Welded mesh is mainly used on the surface of the rock layer to prevent the rock from falling after being broken. The welded mesh is linked with a large number of bolts to form an integrated support system, which greatly improves the safety of the mine.
ANTO welded wire mesh is made of high-strength steel wire, welded by high-frequency welding machines. the welding are not easy to crack.
In coal mine roadway support,coal mine steel mesh is used in combination with steel mesh, bolts and joists,to form an integral bearing structure with bolts as the mainstay. It can increase the bearing area of the bolts, prevent small turquoises from falling between the bolts, greatly improve the overall supporting performance of the bolt system, and make it possible to apply the bolt support to the conditions where the roof is relatively broken or the joints and cracks are developed. And in the roadway affected by mining. Moreover, it can also be used in the case of a large roadway width, thereby significantly improving the supporting effect of the bolt and further expanding the application range of the bolt supporting.
Advantages of welded mesh:
1. Made of high-strength steel wire
2. High frequency welded, not easy to crack
3. Black or hot-dip galvanized
Mining Welded Mesh,Welded Steel Mesh,Galvanized Welded Wire Mesh,Galvanized Steel Reinforcing Mesh anto mining equipment co.,Ltd , https://www.antobolts.com
What should I pay attention to when using Guangdong hydraulic lifts?
The rail type Guangdong hydraulic lift is an indispensable construction equipment for vertical transportation of construction projects. In recent years, the vicious accidents of fixed-type Guangdong hydraulic lifts have occurred from time to time. The root cause, management measures are not in place, and lack of scientificity is the root cause of the hidden dangers of Guangdong hydraulic lifts. Here, take the Guangdong hydraulic lift as an example, and put forward several issues that need attention. 1. Regular test and inspection of anti-fall safety device Anti-falling safety device is an important part of the rail-type hydraulic lift. It relies on it to eliminate the occurrence of the fall accident of the cage and ensure the safety of the occupant. Therefore, the safety test of the anti-falling safety device is very strict. The torque is measured by the legal inspection unit before the factory, the measurement at the critical speed, the measurement of the spring compression, each with a test report, assembled to the rail hydraulic The fall test under rated load is carried out on the lift, and the lift in use on the construction site must be tested every three months. For the two-year anti-falling safety device (the date of shipment on the anti-falling safety device), it must also be sent to the statutory inspection unit for testing and testing, and once every year. Few people have been sent for inspection so far. Some construction sites do not even test the fall test every three months. They all think that their anti-fall safety device has no problem, but they regret it once they have an accident. Why not test and check regularly according to the system? It is better to use the unit blindly to think that it is not bad. In fact, the safety of the anti-falling safety device can only be judged by good tests and inspections. It is impossible to determine whether it is good or bad in daily operation. For those anti-fall safety devices that are overdue service, it is recommended to check and periodically. The test is good, and only by knowing what is in mind can we prevent a serious accident from happening. (Detection of anti-fall safety device, can be sent: Guangdong Haoxiang Machinery Manufacturing Co., Ltd., etc.) 2. Regularly check the safety and reliability of various safety switches. The safety switches of Guangdong fixed hydraulic lifts are designed according to safety requirements, and there are fenced doors. Limit, cage door limit, top door limit, limit position switch, upper and lower limit switch, counterweight anti-break rope protection switch, etc. In some construction sites, in order to save trouble, some limit switches are manually canceled and short-circuited or damaged, and it is not repaired in time. This is equivalent to canceling these safety lines and planting accidents. Example: The cage should be loaded with long things, and the cage should not be placed outside the cage, and the door limit or the top door limit should be manually removed. If the above safety facilities are imperfect or incomplete, the manned cargo will still be loaded. This kind of illegal operation is a joke of taking people's lives. In order to avoid the occurrence of hidden dangers, it is hoped that the unit leaders will strengthen management and strictly require elevator maintenance and operators to regularly check the safety and reliability of various safety switches to prevent accidents. 3. The wear of gears and racks is changed on the construction site. The working environment is harsh. Cement, mortar and dust cannot be cleaned out. The gears and racks are ground together. The teeth are still sharpened and still in use. . It is well known that the tooth profile should be like a cantilever beam, and when worn to a certain size, the gear (or rack) must be replaced. To what extent is it worn out to stop using the replacement? It can be measured with a 25-50mm common normal micrometer. When the common normal length of the gear is worn from 37.1mm to less than 35.1mm (2 teeth), the new gear must be replaced. When the rack is worn, it is measured by the tooth thickness caliper. When the tooth height is from 8.56mm to less than 10.6mm when the string height is 8mm, the rack must be replaced. However, many "old teeth" gears and racks are suspended on the construction site. Chain lifts are still in service for extended periods of time and new accessories must be replaced for safety reasons. 4. Understand the concept of motor duty cycle, according to the scientific law, the elevators on the construction site frequently operate, the utilization rate is high, but have to consider the intermittent working system of the motor, which is often referred to as the problem of the temporary load rate (sometimes called load) Sustainability) It is defined as FC = duty cycle time / load time x 100%, where duty cycle time is load time and down time. Some hydraulic lifts on the construction site are rented by the leasing company. They always want to make full use of them, and the temporary load rate of the motor is completely ignored. How can the motor not heat up? Some even use a burnt smell and still use it, which is very abnormal operation. If the transmission system is poorly lubricated or the running resistance is too large, overloaded, or frequently started, it is even a small horse-drawn carriage.