Monthly Archives: September 2024

　　The most basic usage of GPRS DTU is: put a SIM card with GPRS function in DTU, after DTU is powered on, first register to GPRS network, and then establish connection with data processing center through GPRS network. After the GPRS DTU is powered on, first read the working parameters saved in the internal FLASH (including GPRS dialing parameters, serial baud rate, IP address of data center, etc., which have been configured in advance).This shows that, Wireless Module It has a strong development pulse and is an indispensable source of power for the development of the industry. https://www.hkulike.com/

　　GPRS DTU logs into GSM network, and then dials GPRS PPP. After successful dialing, GPRS DTU will get an internal IP address randomly assigned by Mobile. That is to say, GPRS DTU is in the mobile intranet, and its intranet IP address is usually not fixed and changes with each dial. We can understand that GPRS DTU is a mobile device in the internal LAN, and it communicates with the external Internet public network through the mobile gateway. This is similar to the way that computers in a local area network access external networks through gateways.

　　GPRS DTU actively initiates communication connection with data center, and keeps communication connection always existing. Because GPRS DTU is in the mobile intranet and the IP address is not fixed. Therefore, only GPRS DTU can actively connect to the data center, but not the data center. This requires the data center to have a fixed public IP address or a fixed domain name. The public IP address or fixed domain name of the data center is stored as a parameter in the GPRS DTU, so that once the GPRS DTU is powered on and dialed successfully, it can actively connect to the data center.

　　Specifically, GPRS DTU sends TCP or UDP communication requests to the data center through the IP address and port number of the data center. After receiving the response from the center, GPRS DTU thinks that the handshake with the center is successful, and then keeps this communication connection. If the communication connection is interrupted, GPRS DTU will immediately shake hands with the center again.

　　Since the TCP/UDP communication connection has been established, two-way data communication can be carried out.

　　For DTU, as long as the two-way communication with the data center is established, it is relatively simple to complete the conversion between user serial data and GPRS network data packets. Once receiving the user’s serial data, DTU immediately encapsulates the serial data in a TCP/UDP packet and sends it to the data center. Conversely, when DTU receives the TCP/UDP packet from the data center, it takes out the data content and immediately sends it to the user equipment through the serial port.

　　Through the wired data acquisition center, it communicates with many GPRS DTU in two directions at the same time. This is the most commonly used way in GPRS DTU application system at present.

　　The working frequency of the wireless transceiver module is 315MHz or 433MHz (there are other special frequencies), and the SAW resonator is used to stabilize the frequency, so the frequency stability is extremely high. When the ambient temperature changes between-25 and+85 degrees, the frequency drift is only 3ppm/ degree. It is especially suitable for wireless remote control and data transmission system. The frequency stability of acoustic resonator is second only to that of crystal, but the frequency stability and consistency of general LC oscillator are poor. Even if high-quality fine-tuning capacitors are used, it is difficult to ensure that the tuned frequency points will not shift due to temperature difference and vibration.according to Wireless Module Industry veterans said that its development will still be in a good situation. https://www.hkulike.com/

　　So how to use the wireless transceiver module correctly? The following small series of Zhuoxin Technology introduces the following three methods.

　　1. It is used to build a wireless communication network with star topology.

　　It must be a multi-point star topology, and some special places need wireless communication. On the one hand, this kind of transmitting and receiving module is cheap, and the cost of forming a star topology is relatively low; On the other hand, the transmitting and receiving module can adopt modular design, which is small in size, convenient to use and easy to integrate. This transmitting and receiving module is very practical for wireless networks with low communication speed and close distance.

　　2. Used for wireless multi-channel (parallel) control

　　Such as complex remote control robots, some places need multi-channel control. One method is that the receiver module is directly connected to the decoder, and then connected to electronic components such as relays to drive the subsequent controlled objects; Another method is to connect the receiving module with the single chip microcomputer, and then connect the relay and other electronic components with the single chip microcomputer after data processing to drive the subsequent controlled objects. Usually, a pair of transmitting and receiving modules can realize six parallel wireless control at most. If the number of channels required is more than six, multiple pairs of transmitting and receiving modules can be used to work at the same time to meet the actual needs.

　　3. Used for universal serial port (C502B) wireless data transmission.

　　Usually, many control instruments and devices use serial port, and communication with these devices must meet the requirements of serial port. Some extraordinary places, industrial control sites. When it is necessary to use wireless transmission mode, the transmitting and receiving module mentioned in this paper can be naturally selected. However, it must be explained here that in order to adopt this communication method, the corresponding software must be compiled at the transmitter and receiver to realize the file format conversion, so as to achieve the purpose of wireless communication. If the communication system is full duplex, two pairs of transmitter and receiver modules can be used to work at the same time.

　　Of course, there are some precautions when using the wireless transceiver module. The transmitting module should be installed vertically on the edge of the motherboard, and should be more than 5mm away from the surrounding devices to avoid being affected by the distribution parameters. The transmission distance of wireless transceiver module is related to modulation signal frequency and amplitude, transmitting voltage and battery capacity, sensitivity of transmitting antenna and receiver, and receiving and transmitting environment.

　　In today¨s competitive, noisy and complex restaurant industry, the power of first impressions cannot be underestimated. Imagine that when you step into a restaurant, the first thing that catches your eye is a dynamic and visually stunning commercial display, which displays the charm and skills of cooking in a vivid and lively way, and it can instantly catch the customer¨s attention.from led outdoor display Looking at the development prospects, the future will always bring positive effects. https://chestnuter.com/

　　As we move into 2024, the field of commercial display is booming at an unprecedented rate. For restaurants, being at the forefront of this development is no longer just an optional choice, but a necessary move to survive and develop in the fierce market competition.

　　display advertising machines

　　Commercial display advertising machines have reshaped the catering industry from multiple dimensions.

　　First, enhance visual appeal

　　Once, static images and text menus seemed monotonous and boring, but now they have been replaced by dynamic vision, exciting videos and vivid animations. This change has made the menu a visual feast. The exquisite pictures and smooth dynamic effects make the dishes seem to have life, full of vitality and temptation, greatly enhancing the appeal to customers.

　　Second, the real-time update function

　　The restaurant can update the menu content in real time according to the supply of ingredients, seasonal changes and customer needs, and quickly launch the latest dishes. This can not only ensure the accuracy of dish information and let customers know the latest food choices in time, but also show that the restaurant keeps up with the trend and keeps innovating, thereby attracting more customers who pursue freshness.

　　Third, seamless marketing integration

　　The commercial display advertising machine seamlessly integrates with the restaurant¨s marketing efforts. Whether you are promoting limited-time special dishes or showcasing diverse theme activities, you can present them to customers in the most eye-catching way using the commercial display advertising machine. This seamless connection allows marketing information to reach the target audience more accurately and efficiently, effectively increasing the restaurant¨s popularity and customer flow.

　　Fourth, data-driven insights

　　Digital transformation has given restaurants powerful data collection and analysis capabilities. Through in-depth analysis of the performance evaluation of the content displayed on commercial display advertising machines and customer browsing and selection data, restaurants can optimize menu design and marketing strategies more wisely. For example, you can clearly identify which dishes are most favored by customers and which promotional activities best stimulate their desire to consume, allowing you to make targeted adjustments and improvements that significantly enhance operating efficiency.

　　Commercial display advertising machines have undoubtedly brought new development opportunities and competitive advantages to restaurants. They can not only attract customers and enhance the image of restaurants, but also provide strong decision-making support for the operation and management of restaurants. In the future, I believe that more restaurants will use commercial display advertising machines to create a unique and charming dining atmosphere and create more brilliant performance.

　　Cluster tubes have the compressive and tensile strength to protect optical cables and flexibility, and are easy to bend or fix inside cabinets or enclosures. This article will provide some knowledge about cluster tubes.In today’s market background, fiber optic patch cable Still maintain a strong sales data, and constantly beat the competitors in front of us. https://kechengdg.com/

　　cluster tubes

　　What is a cluster tube?

　　Cluster tubes are also called protective microducts. This type of duct includes many micro ducts that are loosely or tightly packed together and with a sheath, much like optical cables without optical fibers. One or more ways to make micro ducts into cluster tubes with outer sheaths in a certain combination sequence can accommodate more pipeline resources in a limited space.

　　cluster tubes

　　Cluster tube types

　　Cluster tubes are divided into DB (direct burial) and DI (direct installation).

　　DB cluster tube: The outer sheath is a strong high-density polyethylene HDPE that provides excellent physical environmental protection. An aluminum layer is added to provide additional strength (silicone-coated pipe, water-blocking tape, aluminum layer or fabric, two sheath layers, tracer wire, and pull rope).

　　cluster tubes

　　DI cluster tube: The micro duct is surrounded by a layer of moisture-proof metal or non-metal tape and a black HDPE flexible sheath. DI ducts can be installed in pre-existing ducts or sub-ducts.

　　cluster tubes

　　Features and Benefits

　　1. Microduct outer diameter 5-18mm

　　2. The inner wall is a smooth structure, and the silicon layer effectively reduces the friction coefficient of the inner wall

　　3. Can be used to expand the existing pipeline to maximize the pipeline capacity

　　4. Compressive strength and tensile strength

　　5. Convenient construction, saving time and engineering cost

　　Applications

　　A thin HDPE sheath surrounds the cluster tube. This design makes the cluster tube suitable for installation in outdoor direct burial or other existing ducts. In addition, cluster tubes are also used in FTTX networks.

　　Summary

　　Cluster tubes are a good way to get the most versatility from your current empty duct system. It has good mechanical properties and can provide adequate protection for optical cables.

　　As we all know, wireless modules have two common performances. The following small series with outstanding skills will introduce the comparison of the two performances.in fact radio Module Our related products were once praised by users, which is the best self-affirmation of the products. https://www.hkulike.com/

　　Firstly, the instantaneous frequency of the FM carrier transmitted by the FM transmitter is that the FM wave that changes with the modulation signal is an equal amplitude wave, and its maximum power is equal to the average power; The amplitude modulation transmitter emits an amplitude signal, and the maximum transmission power is equal to 4 times the average power. If the last stages of AM transmitter and FM transmitter use the same type of power tubes, and both are estimated according to the maximum power, the power emitted by FM transmitter is four times the average power emitted by FM transmitter.

　　The main feature of FM is its strong anti-jamming performance. The so-called strong anti-jamming performance mainly means that the signal-to-noise ratio at the output of FM receiver is greater than the signal-to-noise ratio at the output of FM receiver under the same input signal-to-noise ratio.

　　The reason why FM has stronger anti-jamming ability than AM can be analyzed from the power of the transmitted signals of the two systems. The power of the side frequency component of FM wave is divided from the carrier power. Its sidebands are not only numerous, but also increase in amplitude, which means that the proportion of power converted into sidebands in carrier rate is large, and the maximum power of sidebands of amplitude-modulated waves is equal to that of carrier power. Therefore, FM has more side frequency power than AM, which means it is more capable of overcoming the noise and interference in the channel or the machine.

　　Secondly, we can make a comparative analysis from the mediation of receiving signals. Because the information of amplitude modulation signal is contained in the amplitude of the amplitude modulated signal, the demodulated envelope detector can’t suppress the parasitic amplitude modulation interference, while the information of FM signal contains the frequency change at the moment of high frequency oscillation, so the parasitic amplitude modulation caused by interference can be removed by limiter.

　　Therefore, the anti-interference performance of FM system is better than that of AM system, regardless of the sideband power of the transmitted signal or the demodulation of the received signal.

　　When it comes to building reliable and high-performance communication networks, 900um buffered fiber optic cables stand out as a smart choice. These cables are designed for durability, flexibility, and easy installation, making them ideal for various applications. Whether you’re planning a large-scale deployment or a small network setup, understanding the key benefits of these cables and how to address common issues will help ensure success.In order to facilitate users to have a better experience, fiber optic patch cable Many attempts have been made to upgrade the products, and the results are also very good, and the market performance tends to be in a good state. https://kechengdg.com/

　　Key Benefits of 900um Buffered Fiber Optic Cables

　　1. Enhanced Durability

　　Benefit: The 900um buffered fiber optic cables have an additional protective layer that makes them more robust than standard fiber optic cables.

　　Advantage: This extra buffer provides enhanced resistance to physical damage during installation and handling, reducing the risk of fiber breakage and ensuring longevity in demanding environments.

　　2. Easy Handling and Installation

　　Benefit: These cables are designed with a thicker buffer coating, making them easier to handle and less fragile than thinner fibers.

　　Advantage: The ease of handling reduces the likelihood of damage during installation, saving time and minimizing the need for repairs. This makes them particularly well-suited for installers and technicians who need to work quickly and efficiently.

　　3. Versatile Applications

　　Benefit: 900um buffered fiber optic cables are versatile and can be used in various applications, including indoor installations, data centers, and network connections.

　　Advantage: Their adaptability makes them a reliable choice for a wide range of projects, from long-distance communication networks to high-speed data transfers in office buildings.

　　4. Cost-Effective for Large Deployments

　　Benefit: Purchasing these cables wholesale offers significant cost savings, especially for large-scale deployments.

　　Advantage: Buying in bulk reduces the overall cost per unit, making it more affordable to implement extensive networks without compromising on quality or performance.

　　5. High Performance and Low Signal Loss

　　Benefit: The 900um buffered fiber optic cables maintain high signal integrity, ensuring low attenuation and minimal signal loss over long distances.

　　Advantage: This leads to faster and more reliable data transmission, which is crucial for maintaining high-performance communication networks.

　　900um fiber optic cables

　　Solutions to Common Problems

　　1. Fragility During Installation

　　Problem: Despite their durability, fiber optic cables can still be prone to damage if not handled properly during installation.

　　Solution: Ensure that installation is carried out by experienced professionals who understand the delicate nature of fiber optics. Using the proper tools and techniques, such as bend radius management and careful routing, can prevent damage.

　　2. Environmental Challenges

　　Problem: Harsh environmental conditions, such as extreme temperatures or moisture, can affect the performance of fiber optic cables.

　　Solution: Choose 900um buffered cables with additional environmental protections, such as water-blocking gels or UV-resistant jackets, depending on the installation environment. Regularly inspect and maintain the cables to prevent degradation over time.

　　3. Connector Compatibility

　　Problem: In some cases, the thicker 900um buffered cables may not be compatible with all types of connectors or splicing equipment.

　　Solution: Use connectors and splicing kits specifically designed for 900um buffered cables. Ensure that the equipment used is compatible with the cable specifications to avoid connection issues.

　　4. Signal Attenuation

　　Problem: Over time, signal attenuation can occur, reducing the efficiency of data transmission.

　　Solution: Regularly test the network for signal loss and clean the connectors to prevent dust and dirt from interfering with the signal. If attenuation becomes an issue, consider replacing or upgrading the cables to maintain optimal performance.

　　5. Bulk Storage and Handling

　　Problem: Storing and managing large quantities of fiber optic cables can be challenging, leading to potential damage or tangling.

　　Solution: Store the cables in a controlled environment with proper spooling to prevent tangling and damage. Use protective covers and avoid stacking heavy items on top of the cables to maintain their integrity.

　　Conclusion

　　Wholesale 900um buffered fiber optic cables offer a combination of durability, ease of installation, and cost-effectiveness, making them an excellent choice for various communication network projects. By understanding the key benefits and proactively addressing common issues like installation fragility and environmental challenges, you can ensure that these cables deliver reliable performance and longevity. Investing in high-quality 900um buffered fiber optic cables will not only enhance your network’s efficiency but also provide a robust solution that stands the test of time.

　　Smart advertising machines have long been widely used in the healthcare field. Now let¨s turn our attention to smart advertising machines in clinics. Although clinics are not as busy as hospitals, there is still a lot of information to be conveyed. Smart advertising machines can help clinics provide better services to customers in many ways.The industry believes that, outdoor advertising screen The development of our company marks the rapid and steady progress of the whole industry. https://chestnuter.com/

　　smart advertising machines

　　Ways to Serve Customers

　　1. Daily Health Tips

　　Set up an easily visible screen in the waiting area or consultation room to display daily health tips, including nutrition, chronic disease management, etc. You can also share some interesting content so that customers can gain health knowledge in a relaxed atmosphere.

　　2. Seasonal health alerts

　　Provide corresponding health advice according to different seasons, such as allergy protection in spring, sun protection and moisturizing in summer, and disease prevention in winter.

　　3. Product and service promotion

　　Introduce the products and services provided by the clinic, including basic medicines, new products, etc. By making attractive slides, show the characteristics, efficacy and usage of the products.

　　4. General Medication Information and Guidelines

　　Inform customers of general medication guidelines, such as when to take medication, whether to take with food, and what to do if you forget to take medication or take an overdose. For new or prescribed medications, provide more detailed information, including instructions for use, potential side effects and interactions, etc.

　　5. Scheduling Appointments

　　If the clinic offers additional services, such as health checks, vaccinations, etc., list these services on the smart advertising machine so that customers can learn about them and make appointments.

　　6. Prescription preparation notification

　　Use the screen to notify customers of the prescription preparation status and reduce the waiting time of customers. At the same time, promote online booking services to facilitate customers to start consultations at home and reduce waiting time in the clinic.

　　Notes

　　1. Evaluate customer needs

　　Understand customer interests and needs, display relevant content in a targeted manner, and improve customer engagement and satisfaction.

　　2. Be concise and clear

　　The content should be concise and easy to understand, avoiding overly professional terms and complex sentence structures.

　　3. Update in a timely manner

　　Update the content of the smart advertising machine in a timely manner according to changes in seasons, products and services to keep the information fresh and accurate.

　　4. Interactivity

　　Add interactive elements, such as touch screens, QR codes, etc., so that customers can obtain more information independently.

　　In short, the clinic smart advertising machine is an effective information dissemination tool that can help the clinic improve service quality and enhance customer satisfaction and loyalty. By making reasonable use of smart advertising machines, clinics can provide customers with more personalized, convenient and considerate services.

　　The most basic usage of GPRS DTU is: put a SIM card with GPRS function in DTU, after DTU is powered on, first register to GPRS network, and then establish connection with data processing center through GPRS network. After the GPRS DTU is powered on, first read the working parameters saved in the internal FLASH (including GPRS dialing parameters, serial baud rate, IP address of data center, etc., which have been configured in advance).precisely because Wireless Module The rapid development of, so also brought new opportunities to the industry. https://www.hkulike.com/

　　GPRS DTU logs into GSM network, and then dials GPRS PPP. After successful dialing, GPRS DTU will get an internal IP address randomly assigned by Mobile. That is to say, GPRS DTU is in the mobile intranet, and its intranet IP address is usually not fixed and changes with each dial. We can understand that GPRS DTU is a mobile device in the internal LAN, and it communicates with the external Internet public network through the mobile gateway. This is similar to the way that computers in a local area network access external networks through gateways.

　　GPRS DTU actively initiates communication connection with data center, and keeps communication connection always existing. Because GPRS DTU is in the mobile intranet and the IP address is not fixed. Therefore, only GPRS DTU can actively connect to the data center, but not the data center. This requires the data center to have a fixed public IP address or a fixed domain name. The public IP address or fixed domain name of the data center is stored as a parameter in the GPRS DTU, so that once the GPRS DTU is powered on and dialed successfully, it can actively connect to the data center.

　　Specifically, GPRS DTU sends TCP or UDP communication requests to the data center through the IP address and port number of the data center. After receiving the response from the center, GPRS DTU thinks that the handshake with the center is successful, and then keeps this communication connection. If the communication connection is interrupted, GPRS DTU will immediately shake hands with the center again.

　　Since the TCP/UDP communication connection has been established, two-way data communication can be carried out.

　　For DTU, as long as the two-way communication with the data center is established, it is relatively simple to complete the conversion between user serial data and GPRS network data packets. Once receiving the user’s serial data, DTU immediately encapsulates the serial data in a TCP/UDP packet and sends it to the data center. Conversely, when DTU receives the TCP/UDP packet from the data center, it takes out the data content and immediately sends it to the user equipment through the serial port.

　　Through the wired data acquisition center, it communicates with many GPRS DTU in two directions at the same time. This is the most commonly used way in GPRS DTU application system at present.

　　In the rapidly evolving digital communication landscape, LCD signage has emerged as a vital tool for efficiently and accurately delivering information. Often referred to as LCD advertising displays, electronic displays, or information screens, these devices serve diverse roles across education, business, healthcare, and public spaces.In the long run, outdoor advertising screen The value will be higher and higher, and there will be a great leap in essence. https://chestnuter.com/

　　LCD signage refers to physical or electronic displays designed to convey information to an audience. It is a versatile medium capable of delivering everything from announcements and schedules to interactive content and multimedia presentations.

　　lcd advertising

　　Functions of LCD Signage

　　Traditional bulletin boards, typically found in schools, offices, and community centers, are static displays that rely on physical materials like paper and pins. Updating content on these boards requires manual effort, making the process time-consuming and inflexible. While simple and cost-effective, this method lacks the agility and immediacy needed for frequent information updates.

　　LCD signage, on the other hand, has revolutionized this process by supporting dynamic content updates, multimedia presentations, and remote management. These electronic displays can showcase a wide range of content, including text, images, videos, and real-time data. Their dynamic nature allows for instant updates, and content can be remotely controlled through multimedia messaging software. This is particularly advantageous in environments where information changes frequently or needs to be broadcast across multiple locations simultaneously.

　　Interactive LCD signage takes this a step further by integrating touchscreens or other interactive features, enabling users to engage directly with the content. This interactivity is especially beneficial in settings like shopping malls and airport self-service kiosks, where it helps users quickly access the information they need.

　　Innovative Applications of LCD Signage

　　In corporate settings, LCD screens placed in high-traffic areas can share company news, employee achievements, and important announcements, fostering communication and keeping employees informed and engaged. For example, a display in a company lobby can welcome visitors and provide key organizational information.

　　Educational institutions can leverage LCD signage in classrooms to advertising display daily schedules, event timelines, and important announcements. Interactive signage can also enhance teaching by allowing teachers to access relevant materials with a single click, making the learning experience more engaging and interactive.

　　Healthcare facilities use LCD signage to manage patient flow and alleviate staff workload. Hospital signage can display patient information, visiting hours, health tips, and emergency alerts, keeping patients and visitors well-informed.

　　Retailers utilize LCD signage to promote products, display advertisements, and provide customer information, thereby enhancing the shopping experience and driving sales. For instance, retail stores can use these displays to showcase promotions, new products, and customer reviews to attract shoppers and influence purchasing decisions.

　　Transportation hubs such as airports and train stations rely on LCD screens to provide real-time schedules, delay information, gate details, and travel advisories, helping passengers stay informed and reducing anxiety. Additionally, these screens offer crucial updates, such as emergency instructions.

　　City councils deploy LCD signage in public spaces to broadcast public announcements, weather updates, and emergency alerts, ensuring that vital information reaches a broad audience.

　　Benefits of LCD Signage with Electronic Displays

　　Compared to traditional bulletin boards, LCD signage with electronic advertising displays offers numerous advantages. It enables real-time updates, ensuring that information is always current. The ability to display multimedia content makes information more engaging and easier to comprehend. Remote management allows for quick updates and changes without requiring physical intervention. Over time, LCD signage proves more cost-effective by reducing the need for printed materials and manual updates, thus lowering paper consumption and benefiting the environment.

　　In conclusion, LCD signage is playing an increasingly important role in modern information dissemination. With its diverse functions and significant advantages, it is poised to demonstrate even greater value across various sectors in the future.

　　Cable knowledge, cable people most need the knowledge of fine solutionFor this reason, it can be speculated that network cable The market feedback will get better and better, which is one of the important reasons why it can develop. https://kechengdg.com/

　　cable knowledge

　　1. What requirements should the design of cable joints and intermediate heads meet? The requirements to be met are:

　　(1) High compressive strength, good conductor connection;

　　(2) large mechanical strength, small medium loss;

　　(3) Simple structure, strong sealing.

　　2. Where are the inner shielding layer and outer shielding layer of the power cable? What material is used? What does it do?

　　In order to make the insulation layer and the cable conductor have better contact and eliminate the increase in the electric field strength of the conductor surface caused by the unsmoothness of the conductor surface, the conductor surface is generally covered with an internal shielding layer of metalized paper or semiconductor paper tape. In order to make the insulation layer and the metal sheath have better contact, there is generally an outer shielding layer on the surface of the insulation layer. The outer screen layer is the same material as the inner screen layer, and sometimes copper tape or braided copper wire tape is tied outside.

　　3. Which aspects should be considered in choosing the section of power cable? The following aspects should be considered:

　　(1) The working current allowed through the cable for a long time;

　　(2) Thermal stability once short-circuited;

　　(3) The voltage drop on the line cannot exceed the allowable working range.

　　4. cable in the transportation and loading process should pay attention to what?

　　(1) In the transportation and loading process, the cable and cable tray should not be damaged, it is strictly prohibited to push the cable tray directly from the car, the cable should not be flat transport, flat storage.

　　(2) Before transporting or rolling the cable tray, it must be ensured that the cable tray is firm, the oil pipe between the cable wound and the oil-filled cable and the pressure tank should be fixed and not damaged, the pressure tank should be firm, and the pressure indication should meet the requirements.

　　5. What are the requirements for bending the cable core when making the cable head?

　　When bending the wire core, the paper insulation shall not be damaged, and the bending radius of the core wire shall not be less than 10 times that of the cable core. Special care should be taken when making, and the bending part of the wire core should be evenly stressed, otherwise it is easy to damage the insulation paper.

　　6. briefly describe the plastic cable heat shrink sealing method.

　　The heat shrink method is suitable for the sealing of medium and low voltage rubber and plastic cable joints and terminal heads, and can also be applied to non-dripping and viscous impregnated insulated cables. Two kinds of heat shrinkable tubes, crosslinked polyethylene type and silicone rubber type, which can shrink evenly when exposed to heat, are adopted. The tube is covered in the predetermined adhesive sealing part, and the adhesive part is coated with hot melt adhesive, when heated to a certain temperature, the heat shrink tube will shrink, and the hot melt adhesive will melt, and a good sealing layer will be formed after natural cooling.

　　7. What should be paid attention to when bending cable protection tubes with electric pipe bending machine?

　　(1) The pipe bending machine should be operated by personnel who understand its performance and are familiar with the operation knowledge;

　　(2) It must be checked before use, the button, the operation handle, the stroke switch should be in good condition, and the pipe bender must be reliably grounded;

　　(3) Select the mold that meets the requirements and determine the required bending radius;

　　(4) There should be sufficient scope of activity around the construction site;

　　(5) When the idling is normal, it can work with load. During operation, it is forbidden to touch the rotating part with hands and feet;

　　(6) After the work is completed, the power should be cut off in time to release the oil pressure.

　　For more cable professional information, procurement, supply information please contact us.