What are the common vibration operations? What is it??
The impact of vibration on human body can be divided into whole body vibration and local vibration. Whole body vibration is mainly caused by the vibration source (vibration machine, vehicle, moving work platform) passing through the support part (foot and hip) of the body, spreading the vibration along the lower limbs or trunk, and then the vibration is transmitted to the operator's hands and arms through the vibration tools, vibration machine or vibration workpiece.
The frequency range of whole body vibration is mainly 1Hz~20Hz. The frequency range of local vibration action is 20Hz~1000Hz. The above division is relative. In a certain frequency range (such as below 100Hz), there are both local vibration and whole body vibration.
1. Local vibration operation: It mainly refers to various types of work using vibration tools, such as sand riveter, forger, driller, tamper, grinder, and users of electric saw and planer.
2. Whole body vibration operation: mainly the operators of vibrating machinery. For example, the source operator of the source truck and the operator of the truck mounted drilling rig; The generator workers in the drilling generator room and the vibration workers on the field mobile equipment such as the tractor operators for seismic operations and pre drilling operations, such as the forgers.
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Laying of buried pipes
1) Grooving on the wall or in the air concrete can be used to embed pipe devices. Grooving on the wall or in the air should be carried out along the direction of pipe laying to meet the needs of laying concealed pipes. The width of the groove shall ensure that the thickness of the pipe cover layer is not less than 20mm on the wall and 100mm in the concrete air.
2) Before laying pipes on the wall and laying buried pipes, use cement nails to fix the pipes in a positive direction (the bayonet faces outward), with the pipe clamp distance of about 200mm, and then push the buried pipes into the pipe clamp for fixation.
3) At the end of the pipeline laying to fill the cover layer, stop the ventilation inspection, use the pressure gauge to pressurize the inspection or use soapy water to coat the joint to check whether the leakage is caused by improper devices. After inspection, if there is no leakage, the materials such as cement can be used to fill the groove and seal the pipeline. The assembly and connection part of the pipeline must be exposed to the wall or the air for easy connection with the appliance.
4) If the buried installation device is not adopted, the exposed pipe device can also be used, and the pipe clamp is also used for isometric connection.