1: Installation specifications and tips:
1. The laying of drag chain cables shall not be twisted, violent or rough. The cable shall be smoothly unrolled by rotating drum or cable drum or hung if necessary.
2. The cables in the drag chain shall not touch each other or be tied together. They must be loosely and evenly placed side by side in the drag chain. Spacers shall be used as far as possible to separate or insert into the separation cavity of the support blank. The clearance between cables in the drag chain shall be at least 10% of the cable diameter.
3. Both ends of the cable must be fixed, or at least at the moving end of the drag chain. The distance from the cable moving point to the end of the drag chain shall be 20-30 times of the cable diameter.
4. Ensure that the cable is completely moved within the bending radius and cannot be forcibly moved. The cables can be moved relative to each other or together with the guide device.
5. Scientific methods shall be adopted during installation to ensure reasonable connection of all positions. At the same time, pay attention to the structure of the drag chain cable. It is not allowed to damage the internal structure due to human or machine use. If damaged, dangerous phenomena such as short circuit may occur during use.
6. If the drag chain is broken, the cable also needs to be replaced, because the damage caused by excessive tension is unavoidable.
2: Type selection specifications and tips:
1. Understand the requirements of the installation environment and use scenario of the drag chain, including temperature, humidity, oil resistance, hydrolysis resistance, UV resistance and other environmental factors.
2. Attention must be paid to the minimum bending radius of the cable. (there is a great difference between fixed installation and drag chain installation, please note).
3、 Transportation and storage requirements:
1. Rough loading and unloading are prohibited during transportation, and forklift and other tools shall be used as much as possible. It is prohibited to drag directly on the ground to avoid abrasion of cable sheath.
2. Storage must be placed in a dry / cool environment to prevent exposure to sunlight. Moisture and contact with corrosive liquids / gases must be avoided.
1. When cables are inserted into each other, the high-voltage line shall be under the high-voltage cable. If one of the cables is maintained through the pipeline or separated by a partition within 1m before and after the insertion point, the minimum allowable interval is 0.25m.
2. When the cable is close to or interpenetrated with the heat pipe, if there are thermal insulation measures, the minimum distance between parallel and interpenetration is 0.5m and 0.25m.
3. When the cable crosses the railway or highway, it shall be cured through the pipe, which shall extend 2m beyond the highway or pavement.
4. The distance between the cable and the building foundation shall ensure that the cable is buried outside the building apron; When the cable is led into the building, it shall be maintained through the pipeline, and the maintenance pipeline shall also exceed the parking apron of the building.
5. The distance between the cable indirectly buried underground and the grounding of the common grounding device shall be 0.25-0.5m; The buried depth of cables indirectly buried underground shall not be less than 0.7m and shall be buried below the frozen soil layer.
It has good flexibility and elasticity (the elongation length can reach 3.5-4 times of the original spring length). It has good cold resistance, flame retardancy, oil resistance and wear resistance. We can produce all kinds of spiral spring wires according to different requirements.
Conductor structure: single stranded or glued bare soft copper wire (or tinned copper wire)
Insulation material: PVC, polyethylene, polyethylene or polyethylene can be used to meet the requirements of different occasions.
Sheath material: polyurethane elastic material and PU material are generally used
Working temperature: as required, cold resistant - 65 ℃; Temperature resistance: 80 ℃. 105 degrees. 125 degrees
No matter in communication (telephone, radio) or medical technology, electric locomotive industry, mechanical engineering, or lighting industry, spiral cables are applied everywhere. In addition to the electrical mechanical advantages, spiral cables are often used as excellent optical structural solutions. If you use PVC and pur cables, the color of the spiral cable can be coordinated with the color of the object in most cases. We can also supply: shielded spiral cable. Spiral spring cable series, spiral cable for instruments and meters, spring wire for automobile power supply, spiral cable for transformer power supply, spiral cable for large electromechanical equipment, spiral cable for cleaning machine power supply, 5-core spring wire for automatic billing of electric meters, etc.
1. PVC spiral cable: high economy, low mechanical and chemical resistance. Medium elastic force. Suitable for light industry, computer and other occasions.
2. Pur spiral cable: very good elastic force. It has excellent mechanical and chemical properties, especially cold resistance, oil resistance, weather resistance, abrasion resistance and tear resistance. It is suitable for mechanical manufacturing, electric tools and other occasions. It is the best solution in most fields of application.
3. Pur shielded spiral cable: excellent chemical performance. Especially cold resistant, oil resistant, weather resistant, abrasion resistant and tear resistant. The spiral integral shielding structure can resist various electromagnetic interference, and is especially suitable for medical treatment, semiconductor, chip and other occasions requiring minimal installation space.
The elevator cable is designed with special structure and has a long service life to maximize the operating efficiency of the elevator manufacturer. The elevator control cable can provide overall electrical control and bear mechanical stress when the suspension length is long. The elevator cable can be used for long-distance suspension because it adopts steel wire bearing cable core.
Assembly is an important link in the product life cycle. The assembly of a product directly affects its development time, cost and maintenance cost. It is one of the important performance indicators of a product, and more and more attention is paid by product developers. With the development of modern design concepts such as concurrent engineering and DFX and supporting technologies such as virtual reality technology and CAD technology, virtual assembly technology, which focuses on product assembly, is more and more widely used in product development. Assembly simulation is the basis of virtual assembly technology. It can evaluate the assembly ability of products in the stage of product design and assist assembly process planning.
Assembly simulation includes assembly object modeling, assembly process planning and assembly process simulation. Assembly object determines assembly process, and assembly process is the basis of assembly process simulation With the different properties of assembly objects, the processing methods of the above contents are different According to the deformation of the assembly unit in the assembly process, the assembly unit can be divided into two categories - "rigid components" with relatively fixed shape and "flexible cables" with easy deformation. Accordingly, the assembly object can also be divided into two categories - "multi rigid body system" (only composed of "rigid components") and "rigid flexible hybrid system" (including "rigid components and" flexible cables "). [3]
For the assembly simulation of "multi rigid body system", the corresponding assembly object modeling, assembly process planning and assembly process simulation methods have been relatively mature. However, for the "rigid flexible hybrid system", the corresponding research work is few, and mainly focuses on two aspects: the first aspect is the cable routing method aiming at the research of cable modeling; The second aspect is the cable simulation method aiming at simulating cable deformation. How to plan the assembly process of "rigid flexible hybrid system" from the system level based on the research results of cable routing and cable simulation, and finally form a complete assembly simulation solution of "rigid flexible hybrid system" is an urgent problem to be solved in product assembly simulation. Since most products are "rigid flexible hybrid system" containing both "rigid components" and "flexible cables", the assembly simulation method has great practical value in engineering. Based on the research on cable routing, a complete set of assembly simulation method of "rigid flexible hybrid system" is realized from the perspective of engineering application.
The cable is generally used for 20 years. However, if standard work is not used in the process, its service life will be gradually reduced. The crane cable and drag chain cable will be aged in a certain period of time. When the wire is used for home decoration, it is used in actual use. Because there are many aging, how to extend its service life? Today we will explain its maintenance and service for you.
The length of different periods of use of wires depends on the quality of wires, the installation environment of wire equipment and the network environment. The external insulation layer of the household line is made of plastic and rubber. It is very dangerous to lose the insulation of electric wires. If two wires contact each other, or the live wire contacts something connected to the earth, it will be electrified, thus increasing the temperature of local wires and generating sparks.
Crane cable maintenance skills: do not suffer from moisture, heat, corrosion or collision. Pay attention to the inspection of wires used for a certain service life, and replace them in time if any fault is found. Do not overload the wires. It is often possible to check the use of electrical and wiring in the home, and timely and effectively carry out management, maintenance and repair. If it is found that the lines of old buildings are flooded or wet, especially the lines are in disrepair and aging, the electrician shall be asked to repair them immediately.
The spiral cable is usually a linear cable formed by twisting one or more groups of insulated wires, and the cable is wound and heat treated, and finally cooled to form a retractable spiral state. We call this special cable spiral cable. Spiral cable mainly includes: power spiral cable, mechanical equipment spiral cable, spiral optical cable and communication equipment spiral cable.
Spiral cable consists of insulated wire core and sheath. The inner core of the insulated wire core is a conductor and the outer layer is an insulating layer. The outer layer of the insulating core has a sheath layer. The warpage rate of the joint is less than 12, the twisted insulating core is less than 12, and the outer part is an extruded thermoplastic elastomer sheath layer.
Crane cables are suitable for heavy machinery, such as frequent winding and unwinding with torsional stress, and are commonly used in transportation and conveyor belt systems, cranes, mining and rail motors. The neoprene outer sheath enables the cable to resist ozone and ultraviolet radiation as well as oil, acid and other solvents. The cable can be used in dry or wet rooms and outdoors.
Some requirements for crane cables:
① Soft and good bending performance: meet the requirements of small radius of curvature of mechanical guide wheel;
② Wide range of application: the products are divided into adhesion, semi adhesion and non adhesion types to meet the customer selection requirements of various models;
③ Compact overall structure: meet the requirements of different winding modes of pulley type and cage type construction elevators;
④ High safety and continuous core: during the warranty period, the cable reciprocating operation generally reaches more than 100000 times. The bending test of the finished cable shows that the cable can continuously withstand the reciprocating operation for more than 200000 times, and the conductor does not break the core.
Crane cables are widely used in crane and other occasions, and can provide the crane and crane with functions such as power transmission and signal control. However, the crane and crane will be under great pressure during operation. Therefore, crane cables are required to have very good cable characteristics to ensure normal and long-term working pressure.
Crane cables are widely used in various power devices in lifting and transportation machinery, electrical, iron and steel, metallurgy, port, mine, logistics and storage industries. Indoor and outdoor installation and use, suitable for temperature, acid, alkali and oil salt resistance, and can be protected. Good flexibility, can withstand bending and back and forth movement, stable and non twisting, reliable performance and long service life.
The crane cable shall also adapt to the temperature, be resistant to acid, alkali and oil salt, and be able to be protected. It is particularly soft and moves back and forth by bending resistance, stable and non twisting, reliable performance and long service life.
In the past few years, the crane cable industry has been in a state of continuous growth. With the strengthening of port machinery, crane lifting equipment and other industries in China, there is a huge demand for crane cables. According to the analysis of relevant people, there are many small and medium-sized enterprises producing crane cables in the market. Although the development scale is large, it also creates many obstacles and affects the development of crane cables. The demand for crane cables is rapidly increasing, but the supply and demand do not match. In recent years, the output growth rate of crane cables has gradually slowed down, but after deducting the price of copper and aluminum, the output growth rate actually exceeds 10%. Crane cable polymer products mainly rely on foreign manufacturers, leaving a great development space for domestic manufacturers. Capacity bottlenecks were opened, and cable raw materials broke through the import monopoly. The technical level of the company is in a position in the industry. Many products are in short supply. The lack of early production capacity limits the development of the company. With the rapid development of the domestic cable crane industry, 2021 is still the development year of China's cable crane industry, and quality is still the top priority of the whole industry. Faced with the pressure of overcapacity in the whole industry, the national strategy and the accelerated going out of China's equipment will provide new opportunities for China's crane cable industry. The whole cable industry needs to continue to make efforts in quality.
However, there are many obstacles to the development of domestic crane and cable industry, such as the influence of cable raw material price, market price war, large production scale of small and medium-sized enterprises, and fierce competition for orders among small and medium-sized enterprises. At present, the market environment of China's crane cable industry is very good. The quality of domestic and industrial metal materials has been further improved, replacing imports. This has changed the current situation that only cable varieties in China have reached the acceptable and competitive level in the international market, and 70% of cable varieties need to be improved in production level and grade. The low quality of crane cable products makes the wire and cable industry have many problems. These problems make it difficult for China's crane cable products to compete in the international market, and domestic malicious competition is internal friction.
Therefore, in the development process of China's crane cable industry, China will inevitably face some industrial malpractices or market order problems. This not only requires the government to strengthen supervision, do a good job in guidance and support, but also requires enterprises to consciously maintain market order. By implementing the market price guidance mechanism in the cable crane industry, the government agencies will help the cable crane industry to form a relatively balanced and reasonable market governance mechanism and mode based on the market mechanism, guide the cable crane industry market, and improve the industrial structure including pricing, service and quality, which will fundamentally solve the industrial drawbacks. In addition, integrating industry resources, expanding the market share of advantageous enterprises and enhancing the stability of the industry are also the focus of the development of crane cables in China in the near future. As a matter of fact, it is in China's interest to promote excellent products to the international market. It will certainly play a positive role in promoting the economic growth of the host country, increasing employment opportunities, cultivating technical personnel, maintaining social stability, and enhancing the regional influence and cohesion of the host country. It is a rare opportunity for mutual benefit and win-win results.
The spiral cable is very stable and plays an important role in the control system. It brings great convenience to the operation of the control system and greatly improves the stability and efficiency of the work. It is common that screw cables are used in the control systems of machine tools, pipelines and other industries, and scientists and inventors are also used in the manufacture of robots, playing a great role in the control of robots, which also promotes the invention and creation of many new machines to a certain extent.
Spiral cable plays an important role in the power system, but it is found in common processing equipment, and can greatly improve the safety factor in work. Sometimes it is also used in the fields of cranes and production lines, which greatly saves people, materials and financial resources.
Because spiral cable has excellent transmission performance, it plays a great role in the transmission field.
Commonly used in instruments, the most common is in automobiles, transformers, large electromechanical equipment and other equipment. It can clear the transmission of data and instructions, so that people can use the machine more clearly and conveniently. Sometimes it is also used for electric meters. The display effect of electric meters is faster and more significant, which is also a good performance of transmission.
Spiral cable plays an important role in many large machines. Because of its excellent adaptability, practicability and wear resistance, it has played an important role in the fields of conveyors, conveyors, agricultural equipment, construction machinery and so on, and has played an excellent mechanical property, corrosion resistance and friction resistance.
The spiral cable has good performance. Compared with other types of cables, the competitiveness is higher, so the spiral cable has a good position in the market, and the purchase and use are also good. Everything can not be separated from its own role.
Through the high free lifting spiral cable in the sheath material, it can be classified into: PVC spiral cable, spiral cable pur, PA spiral cable, and four kinds of rubber spiral cables.
PVC spiral cable has low price but poor performance and is not easy to rebound. We do not need other cables in terms of electrical system performance and physical performance research. It can be mainly used in low-end technical equipment, such as telephone lines.
The price of rubber spiral cable is higher than that of PVC spiral cable, but it is not widely used in China because of its poor elasticity and easy adhesion.
PA spiral cable has higher price and superior performance, but due to its high hardness and strong elasticity, it is difficult to control in the process of use, which is not a wide application.
Pur spiral cable is a kind of spiral cable that can be made by developing new cable materials. It is applicable to a wide range of research and has excellent performance. Pur spiral oil hydrolysis, resistance to weak acid and alkali, anti-aging, UV, microbial corrosion and other excellent properties of chemistry, as well as abrasion resistance, tear resistance, good flexibility and other excellent physical properties, has gradually developed into an enterprise led spiral cable.
During the installation and application of flexible cables, special attention must be paid to the bending radius of flexible cables in order to better ensure the normal use and service life of cables.
Mobile flexible cables are different from fixed flexible cables. Please refer to the following installation and common problems during installation:
1. The laying of flexible cables shall not be distorted, i.e. the cables cannot be released from one end of the cable wire rope drum or cable reel. Instead, the cable shall be rotated to the wire rope drum or cable reel first. If necessary, the cables can be carried out or hung up, so that the cables in this place can only be obtained from under the cable reel at the same time;
2. Be sure to pay attention to the minimum bending radius of flexible cable;
3. Flexible cables must be loosely laid in parallel in the drag chain, separated and sequenced as much as possible, separated with spacers or passed through the peeling cracks of the supporting overhead. The clearance between cables in the drag chain shall be at least 10% of the cable diameter;
4. The flexible cables in the drag chain shall not touch each other or be trapped together;
5. Both aspects of the flexible cable need to be fixed, or at least at the movable end of the drag chain. Generally, the distance between the moving point of the cable and the top of the drag chain shall be 20-30 times of the cable diameter;
6. Please ensure that the flexible cable moves completely within the bending radius, that is, it cannot be forced to move. So that the cables can move relative to each other or to the guiding device. After a period of use, it is best to check the cable position. The inspection must be carried out after the sliding door is moved;
7. If the drag chain is broken, its flexible cable must also be replaced, and the damage caused by excessive stretching cannot be prevented.
There are four key types of flexible cables according to their functions: flexible control cables, flexible data information cables, flexible servo motor cables and flexible driving force cables.
Flexible cables are classified into two key types according to the application situation: fixed and fixed flexible cables and mobile flexible cables.
The flexible cable for mobile application is divided into cable drag chain cable, intelligent robot cable, wire rope reel cable, inductor / servo motor cable, AC servo motor cable, etc. according to different applications
Flexible cable is the preferred cable for electric energy transmission raw material and data signal transmission medium, which can be used for sometimes moving applications and reciprocating places. The key to the conductor structure of flexible cable is the stranded copper conductor structure according to DIN VDE 0295 and IEC 228 specifications class 5 and class 6. The wire sheath is made of low viscosity and flexible metal composite materials to alleviate the abrasion of the cable during continuous reciprocating motion.
● Flexible cables are made of high-quality elastomer materials, which have the characteristics of bending resistance, acid and alkali resistance, abrasion resistance and corrosion resistance. Most of them are used in AC servo motors, intelligent robots, lifting equipment, automatic machinery, etc.
● Under the specific conditions of the same electrical equipment, the flexible cable is smaller in outer diameter and lighter in weight than other similar cables. The flexible cable has good bending characteristics, and the Zui small bending half diameter can be 4 times the outer diameter of the cable.
● Flexible cables are widely used as control electrode connecting wires and data signal transmission. In the regulation module with bending regulations, it is dedicated to the cable drag chain system with continuous bending, free movement and compulsory activities, and at the same time, it can maintain the regulation of the place where the cable is soft and moving. The dry or humid indoor air can make the cable service life longer and can also be used outdoors.
Crane refers to the lifting machinery that can complete the vertical lifting and horizontal handling of objects within a certain range. This kind of lifting machinery is also called crown block, crane, gantry crane, tire crane, etc. The installation mode of the cable is divided into reel retraction, reel retraction or suspension. The cable needs to follow the motor for mobile power supply. Ordinary cables can not support the long-term power supply lifting of machinery, or the core is broken, the sheath is cracked, and it is easily worn and broken. Professional mobile cables shall be selected for the crane cables to ensure the continuous power supply of the equipment.
How to choose crane cable
Flat cables have the following characteristics:
1. Tortuosity resistance: it ensures that the cable will not easily break the core and crack the sheath when it completes the retraction, crimping and movement.
2. Cold resistance: it is specially used for the crane equipment in the north or other cold regions. Under the low temperature of the cable, the sheath will lose its original flexibility.
3. Oil resistance: it is suitable for places with severe oil pollution, to avoid the cable from contacting with oil for a long time, which will lead to the failure of the sheath performance.
4. Tensile property: the cable structure is compounded with Tinned Soft steel wire rope or aramid wire, which can greatly enhance the tensile strength of the cable.
5. Wear resistance: even if the crane works 24 hours and 365 days a day, the sheath is not easily damaged by friction.
Under the new moon of today's industrial automation, it not only depends on the sophistication of the equipment, but also a high-quality power supply cable is particularly important. It plays the role of transmitting energy, just like the vein of the human body. The shutdown of the equipment caused by the cable is not durable will cause huge economic losses to the enterprise