The hydraulic system is composed of various hydraulic components. The hydraulic components are organically connected by pipes, joints and integrated valve blocks to form a complete hydraulic system. Therefore, whether the hydraulic pipeline is installed correctly, firmly and neatly will have an important impact on the performance of the hydraulic system. 1. Check the quality of the tube. It is necessary to find out whether the material, size and quality of the pipe meet the design requirements; check whether the appearance of the pipe is severely flattened or bent; check whether there is corrosion on the inner and outer wall surfaces of the pipe, and whether there are defects such as cracks on the outer wall. If there is a tube that does not meet the requirements of the regulations or has a serious defect, it cannot be used. 2. Measure the piping size. The position of hydraulic pump station, hydraulic valve table, main engine, auxiliary engine and related parts should be carefully measured and strive for perfection. For pipes with many bending parts and complex shapes between two joints, a sample should be made first, and then the pipe should be cut according to the size or template. 3. The installation pipeline must be reasonably arranged according to the design drawings or the actual location. 4. Air blow the pipes that have been pickled during installation. 5. The joints of the pipes must be connected firmly, and the joint surfaces must be tightly sealed, and there must be no leakage. 6. The pressure oil pipe installation must be firm, safe and stable. The quality of the seals should be carefully checked during installation. Seals that do not meet the requirements are not allowed to be used. When installing the seal, pay attention to the lip direction, and install it carefully. Do not scratch or damage the seal, let alone miss the installation. 7. The welds of butt-welded pipes must undergo a pressure test.

The reliability of hydraulic support has a great influence on the safety production of fully mechanized working face. If the reliability of the support is poor and the failure occurs frequently in use, it is necessary to invest a lot of manpower and material resources for repair and maintenance. However, in the underground repair of the support, especially the replacement of parts, there are many disturbing factors in the poor working environment. Therefore, the hydraulic support in the well overhaul must ensure the quality of overhaul, and the support in the well before overhaul, the most important step is to clean the surface of the residual slime and rust. At present, the support repair units in our country generally use the method of manual cleaning and water washing to clean the hydraulic support. This method must have 2-5 people working together, and has the disadvantages of high labor intensity, large water consumption and low efficiency. Some enterprises try to use emulsion pump as power, although the cleaning efficiency has been improved, but the emission pollution is very serious, which will have a great impact on the environment. Based on the above reasons, the industry urgently needs to find a better way to clean the hydraulic support, which has a very urgent need and practical significance for the repair of coal mine hydraulic support. Therefore, after repeated demonstration, the technicians finally decided to use the high-pressure circulating water cleaning system developed and produced by Beijing degaojie Cleaning Equipment Co., Ltd. to clean the hydraulic support.

What is a USB Cable? The term USB stands for "Universal Serial Bus". USB cable assemblies are some of the most popular cable types available, used mostly to connect computers to peripheral devices such as cameras, camcorders, printers, scanners, and more! USB Cable Construction The USB cable standard allows for these advantages over serial cable types: USB cables are "Hot Pluggable", in other words you can connect and disconnect the cables while the computer is running without fear of freezing the computer USB cables are fast, transferring up to 480Mbps. Compare that to serial communication which transfers data at about 20Kbps USB cables carry power as well as signals. This allows for "USB powered" gadgets as well as recharging batteries in cameras and other USB peripherals USB cables are designed with several distinct connector types, making it easy to identify which plug goes into the computer and which plug goes into the peripheral device USB cables are a universal standard and are fairly easy to find and to afford

WEBOWT has successfully developed a number of weighing instruments that support Siemens Industrial Ethernet (PROFINET) interfaces, such as ID510, ID511, and ID551PN these three instruments Siemens Industrial Ethernet (PROFINET), Rockwell Industrial Ethernet EtherNet/IP , Schneider's MODBUS-TCP, standard TCP/IP communication.

Fabric edge weave distinction: To judge whether the fabric is a sword woven fabric or an air-jet fabric, you can see from the weave of the fabric: (1) Normally, polyester-cotton thread is rapier (locking device), and filament is air-jet weaving (planetary gear device). (2) Air-jet double-split fabric, one side is thread and the other side is filament. (In the middle is a seaming device, and the two sides are equipped with planetary gears). (3) Rapier double-open fabric, both sides of yarn are polyester cotton thread (both are seaming devices). Weaving machine distinction: Rapier looms: use rigid or flexible rapier heads and belts to hold and guide the weft. In addition to being suitable for weaving plain and textured fabrics, rapier looms are characterized by easy color change, suitable for multi-color weft fabrics, and suitable for the production of yarn-dyed, double-layered fleece fabrics, loop fabrics and decorative fabrics. Air-jet loom: The weft yarn is drawn by the compressed air jet, and the weft yarn is brought through the shed. The biggest feature of the air jet loom is fast speed and high labor productivity. It is suitable for plain weave and grain fabrics, fine extra-high-density fabrics and bulk fabrics. The advantages and disadvantages of grey cloth: (1) Air jets generally produce more fine-count yarns, with higher grades, mainly light and thin fabrics; rapier machines generally have more coarse yarns with lower grades, mainly heavy and heavy fabrics. (2) From the equipment point of view, air jet and rapier are nothing more than weft insertion. (3) Weaving grey fabrics of the same organization, the raw material cost is the same, the weaving cost is low, such as twill, the jet speed can be up to 800 revolutions or more, the rapier is only about 180-200 revolutions, and the air jet blocker can look at 10-12 units per person. The maximum number of arrow shafts is 4-6. The commonality and oppositeness of fabrics Commonness: All edges are rough, and they can be of the same specification. Opposite sex: Under the premise of the same yarn count and specifications: ① The jet weight is slightly lighter. ② The flatness of air-jet plain grey cloth is better than that of rapier production. ③ The fabric shrinkage rate of the air-jet loom will be correspondingly larger. ④ The quality of air jet yarn is better than that of rapier.