Yearly Archives: 2024

　　Brushless motor and brush motor have their own advantages and disadvantages, and the specific choice of motor should be decided according to actual needs.From some points of view, 電動輪椅價錢 It is the core driving force to better promote the rapid development of the surrounding markets. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Brush motor is a common motor used in early electric wheelchairs. Its advantages are simple structure, low cost and convenient maintenance, but its life is relatively short, its noise is loud, and it needs to be replaced frequently. Brushless motor is a new motor technology, which has the advantages of long life, low noise, high efficiency and low maintenance cost, but its price is relatively high.

　　Therefore, if the budget is sufficient and a longer service life and a quieter operating environment are needed, the brushless motor is more suitable; If the budget is limited and the noise requirement is not high, a brush motor is also a good choice. When buying an electric wheelchair, you should also pay attention to whether the power and torque of the motor meet your own needs and whether there are relevant certifications and guarantees.

　　Is the electric wheelchair as long as possible?

　　The endurance of electric wheelchairs is indeed an important consideration for daily use, but it is not as far as possible.

　　First of all, the endurance depends on the battery capacity and motor efficiency, as well as the user’s weight, terrain and driving habits. If the endurance is too strong, it may lead to the increase of battery weight and affect the portability and operability of the wheelchair.

　　Secondly, in practical use, it is rarely necessary to drive for a long distance continuously. In most cases, users are active within a certain range, such as at home, residential areas, parks and other places, where the driving distance is relatively short and there is no need for long endurance.

　　Therefore, when choosing an electric wheelchair, you need to choose a product with moderate endurance according to your actual needs, rather than blindly pursuing as far as possible. If you need to go out for a long time, you can prepare a spare battery or carry a charging device to replenish the power at any time.

　　Is the electric wheelchair a lead-acid battery or a lithium battery?

　　Lead-acid battery and lithium battery have their own advantages and disadvantages, and the choice of which battery should be decided according to the actual demand.

　　Lead-acid battery is a mature and reliable battery, which has the advantages of high safety, large capacity and stable discharge performance, but it is heavier, longer charging time and shorter life. Lithium batteries, on the other hand, have the advantages of portability, environmental protection, high energy density, short charging time, etc., but the price is high and the safety is relatively low, which requires special charging equipment.

　　Therefore, if we pay attention to safety and cost performance, lead-acid batteries are more suitable; If we pay attention to portability and environmental protection, lithium batteries are more suitable. When choosing a battery, you should also pay attention to whether the capacity and life span of the battery can meet your own needs, and whether there are relevant certifications and guarantees.

　　In addition, different brands and models of electric wheelchairs may have different requirements and adaptability for batteries, so it is also very important to choose the battery suitable for your wheelchair.

　　It is the energy source of electric wheelchairs, which can be divided into lead-acid batteries and lithium batteries. The voltage of electric wheelchairs is generally 24v. The different ah capacity of batteries directly affects the overall weight, endurance and service life of wheelchairs. With the continuous development of lithium battery technology, modern electric wheelchairs usually use lithium batteries as the power source.In addition to these aspects, 電動輪椅價錢 The performance in other aspects is also relatively good, which has attracted everyone’s attention and research. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Lithium batteries have the advantages of high energy density, light weight and fast charging speed, which can provide a longer cruising range. There are also 6AH lithium batteries in the market that meet the standards of air boarding. People with disabilities and mobility difficulties can travel with portable electric wheelchairs and batteries.

　　If the 20ah lead-acid battery is compared with the 20ah lithium battery, the lithium battery has a lighter weight and a longer battery life, and the life of the lithium battery is relatively long, about twice the life of the lead-acid battery, but the cost of lithium battery will be higher. Lead acid, on the other hand, is relatively more economical, and there are many after-sales points of electric vehicles under the domestic battery brands such as Chaowei, which is convenient for maintaining batteries and replacing carbon brushes, and can meet the needs of users for long-term use.

　　At present, lithium battery electric wheelchairs are mainly used in portable electric wheelchairs, which are relatively inferior to lead-acid in battery life. The later replacement cost is also high. Here, you can refer to the approximate cruising range of the battery collected by Xiaobian. The battery life will be different due to different road conditions, different people’s weights and continuous exercise time.

　　The English word for Screw is screw. The meaning of this word has changed greatly in recent hundreds of years. At least in 1725, it means “mating”.With the upsurge of industry development, dome nut The expressive force in the market has also been very good, bringing many brand-new high-quality experiences to users. https://www.chinatianlong.com/

　　The application of the thread principle can be traced back to 220 BC, when the Greek scholar Archimedes created the spiral water lifting tool.

　　In the 4th century A.D., Mediterranean countries began to apply the principle of bolts and nuts to the press for wine making. At that time, the external threads were all wrapped around a cylindrical bar with a rope, and then carved according to this mark, while the internal threads were often formed by hammering with soft materials wrapped around the external threads.

　　Around 1500, in the sketch of thread processing device drawn by Italian Leonardo da Vinci, there was an idea of using mother screw and exchange gear to process threads with different pitches. Since then, the method of mechanical thread cutting has developed in European watch manufacturing industry.

　　In 1760, the British brothers J. Wyatt and W. Wyatt obtained a patent for cutting wooden screws with a special device. In 1778, an Englishman, J. ramsden, made a thread cutting device driven by a worm gear pair, which could process long threads with high precision. In 1797, H. Maudslay, an Englishman, turned metal threads with different pitches on the lathe improved by him, which laid the basic method for turning threads.

　　In the 1820s, Maudslay produced the first batch of taps and dies for thread processing.

　　At the beginning of the 20th century, the development of automobile industry further promoted the standardization of threads and the development of various precise and efficient thread processing methods. Various automatic opening die heads and automatic shrinking taps were invented one after another, and thread milling began to be applied.

　　In the early 1930s, thread grinding appeared.

　　Although the thread rolling technology was patented in the early 19th century, it developed slowly because of the difficulty in mold manufacturing. It was not until the Second World War (1942 ~ 1945) that the demand of ammunition production and the development of thread grinding technology solved the precision problem of mold manufacturing, and it achieved rapid development.

　　Threads are mainly divided into connection threads and transmission threads.

　　For connecting threads, the main processing methods are tapping, threading, turning, rolling and rubbing.

　　For transmission thread, its processing methods are mainly: rough turning-grinding, cyclone milling-rough turning, etc.

　　Today, let’s take a look at the various processing methods of threads with Xiao Bang and see which method is better.

　　With the continuous development of industrial technology, pump equipment plays an increasingly important role in industrial production. In the fields of chemical engineering, medicine, food, etc., pump equipment, as an important tool for conveying media, has a significant impact on production efficiency and quality. In recent years, with the strengthening of environmental awareness and the increasing demand for safety production, enterprises have become more strict in product selection. In the post pandemic era, the global economy is in a downturn, and business operations are facing even more severe challenges. How to reduce costs and increase efficiency, improve production efficiency and product quality has become an urgent problem for enterprises to solve. As one of the important transportation tools, the selection and optimization of pump equipment have also become an important way for enterprises to improve production efficiency and reduce costs.Down-to-earth right Plating filter In-depth research is the only way to pursue development. http://www.luoyuan108.com/

　　The KG series of coaxial acid alkali resistant pumps we have launched are carefully developed to meet the needs of enterprises. This pump has multiple unique design and technological advantages, which can reduce costs, improve production efficiency, and ensure production safety for chemical enterprises. Let’s learn about the features and advantages of this pump together.

　　01 Product Features

　　The KG series coaxial acid alkali resistant pump is a pump designed for the chemical industry, which has the following characteristics:

　　1. Wide applicability: This pump can be applied to media with various chemical properties, and its applicable temperature is below 85 ≧ for FRPP and PVDF, depending on the different chemical properties. At the same time, choosing different pump body materials can resist strong acids and alkalis, as well as the chemical properties used in fluorination series.

　　2. Unique shaft seal design: adopting Teflon Bellows Seal self cooling type, selecting shaft seal materials Sic, Carbon, Ceramic according to various chemical properties. Compared to other similar products, the shaft seal design of this pump is more unique, which can effectively ensure the service life and operational safety of the pump.

　　3. The rear cover is a combination type: easy to assemble, with no cooling circulation circuit design, and cannot be used idle. The rear cover of the pump adopts a combination design, which is easy to assemble and does not require a cooling circulation circuit, ensuring the safe operation of the pump.

　　4. Low noise: The pump is made of high-quality materials and exquisite craftsmanship, with advantages such as low noise and low vibration. It ensures stable operation of the pump while reducing noise interference during the production process.

　　5. High reliability: The pump adopts advanced production technology and precise mechanical processing, and has undergone multiple rigorous tests and verifications to ensure the reliability and stability of the product.

　　02 Product specifications and parameters

　　03 Advantage Comparison

　　Compared with traditional pumps, the advantages of KG series coaxial acid alkali resistant pumps are:

　　Low noise and low vibration: Designed with advanced fluid analysis technology, the pump’s noise and vibration are minimized, ensuring a quiet and stable production site.

　　Low energy consumption: The design and optimization of pumps can greatly reduce energy consumption, thereby saving energy costs.

　　Long lifespan: The shaft seal of the pump adopts a Teflon Bellows Seal self cooling design, which can greatly extend the service life of the pump.

　　No need for additional cooling circulation circuit: The rear cover of the pump is a combination type, easy to assemble, without a cooling circulation circuit design, and cannot be used idle, making the use of the pump more convenient and reliable.

　　04 Application Fields

　　The KG series coaxial acid alkali resistant pumps are widely used in industries such as chemical, pharmaceutical, electronics, and environmental protection for the transportation, filtration, and circulation of acid alkali liquids. For example:

　　Chemical industry: In fields such as organic synthesis and hydrocarbon cracking, acid-base liquids are inevitable, which requires reliable acid-base pumps for transportation.

　　Pharmaceutical industry: In the process of drug synthesis and formulation, a certain amount of acid-base liquid is required, and the role of acid-base pump is particularly important.

　　Electronics industry: In the production of semiconductors, LCD displays, and other products, various corrosive and electroplating solutions are required. These liquids have strong corrosiveness and volatility, and high-quality corrosion-resistant pumps are needed. The FRPP and PVDF materials of KG series pumps can withstand the corrosion of these chemicals, and adopt a unique Teflon Bellows Seal self cooling shaft seal design, effectively avoiding the damage of chemical corrosion to the pump.

　　Overall, the KG series coaxial acid alkali resistant pumps have the advantages of high efficiency, corrosion resistance, safety, and stability, and are widely used in various industries. Our company will continue to be committed to developing high-quality and efficient pumps, providing high-quality products and services for various industries.

　　Wheelchairs are widely used in patients’ rehabilitation training and family life, such as lower limb dysfunction, hemiplegia, paraplegia below the chest and people with mobility difficulties. As patients’ families and rehabilitation therapists, it is very necessary to know the characteristics of wheelchairs, choose the most suitable wheelchairs and use them correctly.In addition to innate advantages, 電動輪椅 Its own product attributes are also extremely high-end, in order to remain unbeaten in the market competition. https://www.hohomedical.com/collections/light-weight-wheelchair

　　First of all, what harm will an inappropriate wheelchair do to the user?

　　Excessive local compression

　　Form a bad posture

　　Induced scoliosis

　　Causing contracture of joints

　　(What are the unsuitable wheelchairs: the seat is too shallow and the height is not enough; The seat is too wide and the height is not enough)

　　The main parts that wheelchair users bear pressure are ischial tubercle, thigh, popliteal fossa and scapula. Therefore, when choosing a wheelchair, we should pay attention to whether the size of these parts is appropriate to avoid skin wear, abrasions and pressure sores.

　　Let’s talk about the choice of wheelchair, which must be kept in mind!

　　Choice of ordinary wheelchair

　　Seat width

　　Measure the distance between two hips or between two legs when sitting down, and add 5cm, that is, there is a gap of 2.5cm on each side after sitting down. The seat is too narrow, it is difficult to get on and off the wheelchair, and the hip and thigh tissues are compressed; The seat is too wide, it is difficult to sit still, it is inconvenient to operate the wheelchair, the upper limbs are easy to get tired, and it is difficult to get in and out of the gate.

　　Seat length

　　Measure the horizontal distance from the hip to the gastrocnemius of the calf when sitting down, and reduce the measurement result by 6.5cm. The seat is too short, the weight mainly falls on the ischium, and the local pressure is easy to be too much; If the seat is too long, it will compress the popliteal fossa, affect the local blood circulation, and easily irritate the skin of this part. It is better to use a short seat for patients with extremely short thighs or flexion and contracture of hips and knees.

　　Seat height

　　Measure the distance from the heel (or heel) to the popliteal fossa when sitting down, and add 4cm. When placing the pedal, the board surface should be at least 5cm from the ground. The seat is too high for the wheelchair to enter the table; The seat is too low and the ischium bears too much weight.

　　seating washer

　　In order to be comfortable and prevent pressure sores, a seat cushion should be placed on the seat, and foam rubber (5~10cm thick) or gel cushion can be used. To prevent the seat from sinking, a piece of plywood with a thickness of 0.6cm can be placed under the seat cushion.

　　Backrest height

　　The higher the backrest, the more stable it is, and the lower the backrest, the greater the range of motion of the upper body and upper limbs. The so-called low backrest is to measure the distance from the seat surface to the armpit (one arm or two arms extend forward horizontally), and subtract 10cm from this result. High backrest: measure the actual height from the seat surface to the shoulder or back pillow.

　　Handrail height

　　When sitting down, the upper arm is vertical and the forearm is flat on the armrest. Measure the height from the chair surface to the lower edge of the forearm, and add 2.5cm. Proper armrest height helps to maintain correct posture and balance, and can make the upper limbs placed in a comfortable position. The armrest is too high, and the upper arm is forced to lift up, which is easy to fatigue. If the armrest is too low, you need to lean forward to maintain balance, which is not only easy to fatigue, but also may affect your breathing.

　　Other auxiliary parts of wheelchair

　　Designed to meet the special needs of patients, such as increasing the friction surface of the handle, extending the brake, anti-shock device, anti-skid device, armrest mounting arm rest, wheelchair table to facilitate patients to eat and write, etc.

　　When choosing the frame material, we should not only consider the material itself, but also pay attention to the design and function of the frame. For example, folding electric wheelchairs bring great convenience to those who are inconvenient to bend over or have disabled hands, so that they no longer have to work hard to fold electric wheelchairs; The conventional electric wheelchair is comprehensive, affordable and stable, suitable for a wider range of users.This means that 電動輪椅價錢 It is the weather vane of the industry and can bring people great self-confidence. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Front wheel and rear wheel: The design of front wheel and rear wheel of electric wheelchair directly affects its flexibility and shock absorption. Usually, an electric wheelchair has four wheels, two of which are front wheels (universal wheels) and the other two are rear wheels (driving wheels). The smaller the front wheel, the more flexible the wheelchair is, which is suitable for turning flexibly in a narrow space. However, the smaller front wheels are easy to fall into ditches or ground cracks when facing them, which affects the driving experience. In addition, the size of the front wheel also affects the climbing ability of the electric wheelchair. The larger front wheel makes it easier for the wheelchair to climb the stairs, which makes it more convenient for users in their daily lives.

　　Shock absorption: the choice of tires is also very important in shock absorption. The tires of electric wheelchairs are usually divided into pneumatic tires and solid tires. Pneumatic tires have good shock absorption, and it is not easy to feel bumpy when passing through ditches and ridges, while solid tires will feel strong shock when facing uneven roads. In addition, some electric wheelchairs are equipped with special shock absorbers, which makes the driving more stable. These designs not only improve the comfort of wheelchairs, but also make users safer when they are outdoors.

　　In modern industrial production, liquid filtration is a crucial step. The performance and quality of filters directly affect production efficiency and product quality. In order to meet the needs of different industries for efficient, durable, and easy to maintain filters, C has launched a professional, efficient, and one-piece filter – the RYF series filter. This is an innovative filtration solution that ensures efficient filtration while featuring a unique integrated design, making installation and maintenance exceptionally easy.in fact Chemical filter Our related products were once praised by users, which is the best self-affirmation of the products. http://www.luoyuan108.com/

　　Product Introduction

　　The RYF series integrated molding filter is an efficient filtration equipment designed by our company for liquid filtration needs in industrial production processes. This device adopts the design concept of integrated molding, with a compact structure, small size, and easy installation and maintenance. At the same time, the product has a simple and elegant appearance, which can adapt to various production environments.

　　Product features and advantages

　　1. The RYF series one-piece filter has a simple and elegant structure, consisting of a main body, a mesh belt, and an upper cover. The main filtering chamber, inlet and outlet flanges, and upper end flange are all made of high-quality plastic material, which is integrated through advanced injection molding technology to form a sturdy and leak free sealing structure.

　　2. The flange bolt hole spacing of the filter is flexible and versatile, and can easily match with national, American, Japanese, and German standard flanges, demonstrating high compatibility and wide applicability. The unique square base design not only enhances the safety and stability of the filter, but also enables it to be easily fixed in different scenarios.

　　3. It is worth noting that the four hole installation method of the square base cleverly raises the bottom, making it convenient for users to clean and discharge the inside of the filter and the filter medium. This clever idea not only reflects the designer’s humanized consideration, but also enhances the overall practicality of the filter.

　　4. The RYF series integrated filter is made of special materials, including high-quality plastics such as PVDF, PPH, PPR, etc., which enable it to withstand high temperature and high concentration strong acid and alkali environments, and even meet the filtration needs of most chemical liquids. This makes this filter have a wide range of application prospects in industries such as chemical, pharmaceutical, food, and environmental protection.

　　Product model and parameters

　　1. Model number: RYF series integrated filter.

　　2. The filtration area ranges from 0.12-0.5m 2, which can meet the filtration needs of different scales. The flow range is between 12-40m 3/h, which can efficiently and quickly filter a large amount of liquid.

　　3. The material adopts advanced plastic materials PPH, PVDF, and PPR, which not only resist corrosion and high temperature, but also resist the erosion of most chemical liquids, ensuring the stability and long life of the filter.

　　4. The temperature range is between 70-90 ≧, allowing this filter to operate normally in a wide range of temperature environments, with strong adaptability and high reliability.

　　Application industry

　　The RYF series integrated filter has the characteristics of simple structure, safe sealing, easy cleaning and discharge, special material, high temperature and high pressure resistance, and corrosion resistance. These characteristics make the filter widely used in the chemical, pharmaceutical, food, environmental protection, and electroplating industries.

　　In the pharmaceutical industry, the RYF series filters are capable of filtering various corrosive drugs and organic solvents. This not only removes impurities and foreign substances, ensuring the purity and safety of the drug, but also has high efficiency in filtering most chemical solutions.

　　In the food industry, the RYF series integrated filters also play an important role. It can filter impurities and foreign substances in various food ingredients such as beverages and alcoholic beverages, ensuring the quality and safety of the products.

　　In the environmental protection industry, the application of RYF series filters can filter impurities such as suspended solids and organic matter in water, ensuring the safety and purity of water quality. This is of great significance for the field of environmental water treatment.

　　In the electroplating industry, the role of RYF series integrated filters cannot be underestimated. During the electroplating process, various waste liquids and wastewater are generated, which require strict filtration and treatment to avoid affecting the environment and production equipment. The RYF series filters can effectively filter and treat these waste liquids and wastewater, ensuring the stability and sustainability of electroplating production.

　　In short, the RYF series one-piece filter is undoubtedly an efficient, durable, and easy to maintain filtering device. It is widely used in industries such as chemical, pharmaceutical, food, and environmental protection to safeguard your production. Choosing our products can not only help you improve production efficiency and reduce costs, but also enhance your business’s competitiveness in the market. If you have any questions or need more information about our products, please feel free to contact us at any time. We will serve you wholeheartedly! At the same time, please follow our official account for more product information and industry information.

　　Bolt looseness is common, but if you don’t pay attention, it will often cause equipment vibration, component damage, and even casualties. How to tighten a small nut has always been a long-lasting topic in mechanical design. Today, let’s talk about the most basic method of fixing nuts in work.among rock bolts It has given great spiritual support to entrepreneurs, and more entrepreneurs will contribute to this industry in the future. https://www.chinatianlong.com/

　　In general, we analyze the bolt fracture from the following four aspects:

　　First, the quality of bolts

　　Second, the pre-tightening torque of bolts

　　Third, the strength of bolts

　　Fourthly, the fatigue strength of bolts.

　　In fact, most cases of bolt fracture are caused by looseness, specifically, it is damaged due to looseness. Because the situation of bolt loosening and breaking is basically the same as that of fatigue fracture, finally, we can always find the reason from the fatigue strength. In fact, the fatigue strength is so great that we can’t imagine it, and the fatigue strength is not used at all in the use of bolts.

　　01

　　The bolt fracture is not due to the tensile strength of the bolt.

　　Take a M20〜80 8.8-grade high-strength bolt as an example. Its weight is only 0.2kg, and its minimum tensile load is 20t, which is as high as 100,000 times its own weight. Under normal circumstances, we only use it to fasten 20kg parts, and only use one thousandth of its maximum capacity. Even under the action of other forces in the equipment, it is impossible to exceed 1,000 times the weight of the parts, so the tensile strength of threaded fasteners is sufficient and it is impossible to damage them because of insufficient strength of bolts.

　　02

　　The fracture of bolts is not due to the fatigue strength of bolts.

　　Threaded fasteners can be loosened only 100 times in the transverse vibration loosening experiment, but they need to be vibrated repeatedly for one million times in the fatigue strength experiment. In other words, the threaded fastener is loose when using one ten thousandth of its fatigue strength, and we only use one ten thousandth of its great capacity, so the loosening of the threaded fastener is not due to the fatigue strength of the bolt.

　　03

　　The real reason for the damage of threaded fasteners is looseness.

　　When the threaded fastener is loosened, it generates huge kinetic energy mv2, which directly acts on the fastener and equipment, causing the fastener to be damaged. After the fastener is damaged, the equipment cannot work in a normal state, further causing the equipment to be damaged.

　　When the fastener is subjected to axial force, the thread is damaged and the bolt is pulled off.

　　When the fastener is subjected to radial force, the bolt is cut and the bolt hole is oval.

　　04

　　Choosing thread locking mode with excellent locking effect is the fundamental solution to the problem.

　　Take hydraulic hammer as an example. The weight of GT80 hydraulic hammer is 1.663 tons, and its side bolts are 7 sets of M42 bolts of grade 10.9. The tensile force of each bolt is 110 tons, and the pre-tightening force is half of the tensile force, and the pre-tightening force is as high as 300 to 400 tons. However, the bolt will break, and now it is ready to be changed to M48 bolt. The fundamental reason is that the bolt locking cannot be solved.

　　When a bolt breaks, it is easy for people to conclude that the strength is not enough, so most of them adopt the method of increasing the strength grade of the bolt diameter. This method can increase the pre-tightening force of the bolt, and its friction force is also increased. Of course, the anti-loosening effect can also be improved, but this method is actually a non-professional method, and its investment is too large and its income is too small.

　　In short, the bolt is: “If you don’t loosen it, it will break.”

　　Cause analysis of bolt looseness

　　The threaded connection is designed according to the self-locking condition: ψ ＋ρv, and the friction pair generated in the threaded pair makes the bolt self-lock to tighten the bolt, so the connection will not loosen automatically under static load. However, under impact, vibration, variable load and great temperature change, the friction force f of the screw pair will decrease or disappear instantly. If this phenomenon occurs repeatedly, the connecting bolt will gradually loosen. After the threaded fastener is loosened, the kinetic energy mv2 is generated, and the fastener subjected to axial force, the thread is destroyed and the bolt is pulled off. Fasteners subjected to radial force, bolts are cut and bolt holes are broken.

　　Bolt locking principle: limit the relative motion between screw pairs or increase the difficulty of relative motion.

　　Introduction of common anti-loosening methods

　　There are three commonly used methods for locking bolts: friction locking, mechanical locking and permanent locking. Among them, mechanical locking and friction locking are called detachable locking, while permanent locking is called non-detachable locking.

　　01

　　Friction locking

　　1. Spring gasket locking

　　The anti-loosening principle of the spring washer is that after the spring washer is flattened, the spring washer will generate a continuous elastic force, so that the threaded connection pair between the nut and the bolt will maintain a friction force continuously and generate a resistance moment, thus preventing the nut from loosening. At the same time, the sharp corner at the opening of the spring washer is embedded into the surface of the bolt and the connected piece respectively, thus preventing the bolt from rotating relative to the connected piece.

　　2. Lock the top nut (double nut)

　　3. Self-locking nut locking

　　One end of the nut is made into a non-circular convergent or radially convergent after being slit. When the nut is tightened, the closure expands, and the screwing threads are pressed by the elastic force of the closure.

　　4. Locking of elastic ring nut

　　Fiber or nylon is embedded in the thread to increase friction. The elastic ring also plays a role in preventing liquid leakage.

　　02

　　Mechanical locking

　　Locking of groove nut and cotter pin

　　2. Stop gasket

　　After the nut is tightened, the single-ear or double-ear stop washer is bent and attached to the side of the nut and the connected part respectively to realize locking.

　　3. Locking of series steel wire

　　Use low-carbon steel wire to penetrate the holes in the head of each screw, and connect the screws in series to brake each other.

　　03

　　Permanent locking

　　Commonly used permanent locking are: spot welding, riveting, bonding, etc. This method mostly destroys threaded fasteners during disassembly and cannot be reused.

　　In addition, there are other ways to prevent loosening, such as: coating liquid adhesive between screwing threads, embedding nylon rings at the end of nuts, riveting and locking. Mechanical locking and friction locking are called detachable locking, while permanent locking is called non-detachable locking.

　　1, punching method to prevent loose

　　After the nut is tightened, the thread is damaged at the end of the thread.

　　2. Adhesive Locking-Nut Locking Solution

　　Apply the nut locking liquid to the bolt tightening position, and then screw on the nut. After self-curing, the locking effect is good.

　　In modern industrial production, liquid filtration is a crucial step. The performance and quality of filters directly affect production efficiency and product quality. In order to meet the needs of different industries for efficient, durable, and easy to maintain filters, C has launched a professional, efficient, and one-piece filter – the RYF series filter. This is an innovative filtration solution that ensures efficient filtration while featuring a unique integrated design, making installation and maintenance exceptionally easy.So, Magnetic pump On the contrary, there is still a lot of room to play. http://www.luoyuan108.com/

　　Product Introduction

　　The RYF series integrated molding filter is an efficient filtration equipment designed by our company for liquid filtration needs in industrial production processes. This device adopts the design concept of integrated molding, with a compact structure, small size, and easy installation and maintenance. At the same time, the product has a simple and elegant appearance, which can adapt to various production environments.

　　Product features and advantages

　　1. The RYF series one-piece filter has a simple and elegant structure, consisting of a main body, a mesh belt, and an upper cover. The main filtering chamber, inlet and outlet flanges, and upper end flange are all made of high-quality plastic material, which is integrated through advanced injection molding technology to form a sturdy and leak free sealing structure.

　　2. The flange bolt hole spacing of the filter is flexible and versatile, and can easily match with national, American, Japanese, and German standard flanges, demonstrating high compatibility and wide applicability. The unique square base design not only enhances the safety and stability of the filter, but also enables it to be easily fixed in different scenarios.

　　3. It is worth noting that the four hole installation method of the square base cleverly raises the bottom, making it convenient for users to clean and discharge the inside of the filter and the filter medium. This clever idea not only reflects the designer’s humanized consideration, but also enhances the overall practicality of the filter.

　　4. The RYF series integrated filter is made of special materials, including high-quality plastics such as PVDF, PPH, PPR, etc., which enable it to withstand high temperature and high concentration strong acid and alkali environments, and even meet the filtration needs of most chemical liquids. This makes this filter have a wide range of application prospects in industries such as chemical, pharmaceutical, food, and environmental protection.

　　Product model and parameters

　　1. Model number: RYF series integrated filter.

　　2. The filtration area ranges from 0.12-0.5m 2, which can meet the filtration needs of different scales. The flow range is between 12-40m 3/h, which can efficiently and quickly filter a large amount of liquid.

　　3. The material adopts advanced plastic materials PPH, PVDF, and PPR, which not only resist corrosion and high temperature, but also resist the erosion of most chemical liquids, ensuring the stability and long life of the filter.

　　4. The temperature range is between 70-90 ≧, allowing this filter to operate normally in a wide range of temperature environments, with strong adaptability and high reliability.

　　Application industry

　　The RYF series integrated filter has the characteristics of simple structure, safe sealing, easy cleaning and discharge, special material, high temperature and high pressure resistance, and corrosion resistance. These characteristics make the filter widely used in the chemical, pharmaceutical, food, environmental protection, and electroplating industries.

　　In the pharmaceutical industry, the RYF series filters are capable of filtering various corrosive drugs and organic solvents. This not only removes impurities and foreign substances, ensuring the purity and safety of the drug, but also has high efficiency in filtering most chemical solutions.

　　In the food industry, the RYF series integrated filters also play an important role. It can filter impurities and foreign substances in various food ingredients such as beverages and alcoholic beverages, ensuring the quality and safety of the products.

　　In the environmental protection industry, the application of RYF series filters can filter impurities such as suspended solids and organic matter in water, ensuring the safety and purity of water quality. This is of great significance for the field of environmental water treatment.

　　In the electroplating industry, the role of RYF series integrated filters cannot be underestimated. During the electroplating process, various waste liquids and wastewater are generated, which require strict filtration and treatment to avoid affecting the environment and production equipment. The RYF series filters can effectively filter and treat these waste liquids and wastewater, ensuring the stability and sustainability of electroplating production.

　　In short, the RYF series one-piece filter is undoubtedly an efficient, durable, and easy to maintain filtering device. It is widely used in industries such as chemical, pharmaceutical, food, and environmental protection to safeguard your production. Choosing our products can not only help you improve production efficiency and reduce costs, but also enhance your business’s competitiveness in the market. If you have any questions or need more information about our products, please feel free to contact us at any time. We will serve you wholeheartedly! At the same time, please follow our official account for more product information and industry information.

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　　I. Overview of Bone Nail

　　Bone nail, also known as fracture fixation screw, is often used as a fixed orthopedic implant in clinic. Bone nails are usually used to fix internal fractures or dislocations. By directly screwing in two different bone blocks or fixing bone plates and other internal implants, the fractures can be fixed, the bones can be positioned and their healing can be promoted. Bone nails are widely used, including shoulder, elbow, hip, knee, spine and other major areas. For example, pedicle screw system is used for spinal fusion, and compression bone screws are usually used for foot and ankle surgery or other fixation of fractures under pressure. Yao Ming, Duran and other famous stars have implanted bone nails.

　　Second, the main structure of bone nail

　　Similar to traditional mechanical screws, the main structure of bone nail also includes nail cap, nail body and nail tip.

　　Schematic diagram of main structure of bone nail

　　Three, according to the screw function classification

　　Bone screws can be divided into plate screws, tension screws, position screws, interlocking screws and reduction screws according to their different functions.

　　Table 1. Function Classification of Screws

　　Several common screws

　　Fourth, bone nail materials change with each passing day

　　Traditional bone nails are mainly made of two materials, stainless steel and titanium. With the advent of new biodegradable biomaterials, more and more materials are used to make bone nails.

　　(1) Bioabsorbable screws

　　At present, although Chinese enterprises still mainly promote basic products, new degradable bone nails are being actively developed and put into the market. In recent years, more bone nails made of absorbable materials have entered the market and achieved good clinical results.

　　Common absorbable screws (left: PLA absorbable screws; Right: magnesium bone nail)

　　(2) Coated screws

　　In addition to manufacturing materials as a whole, many companies have also begun to study the surface coating of screws, thus increasing the surface wear resistance and hardness of bone nails and reducing the effect of material rejection. For example, Nail PROtect, launched by DePuy Synthes, an orthopedic materials giant, claims to have the effect of preventing infection.

　　Nail PROtect

　　(3) Biological bone nail

　　At present, there is no manufacturer producing biological bone material in China, but the excellent biological performance and postoperative rehabilitation effect of biological bone material are better than any artificial implant. The good biocompatibility of biological bone nail does not need to worry about rejection and secondary surgery. Researchers at the University of Graz in Austria have developed an allogenic orthopedic screw and named it shark screw, which has been clinically applied in 14 hospitals in Austria. Although the problem of bone donation needs to be solved in addition to processing technology, with the enhancement of Chinese people’s awareness of donation and the current situation of China’s population base, it is believed that biological bone materials also have huge market potential.

　　Shark screw

　　It is expected that the relevant enterprises in China’s bone nail industry will start from the details, concentrate on research and development, pay attention to innovation, and take advantage of the policy dividend, and small screws can also raise hundreds of millions of markets ~