The working principle of the pneumatic diaphragm pump is that the power end slams the hydraulic cylinder and completes the pleasure of the slurry. The crank mechanism of the power end is one of the key components of the plastic pneumatic diaphragm pump. The level of design directly affects the performance of the town machine. At present, the widely used diaphragm pump product design method is a planar simplified mechanism design method, which simplifies the three-dimensional space device structure into a two-dimensional plane problem. Since many of the considerations in the simplification are the linear dimensions of the device, the spatial shape cannot be well depicted.
The diaphragm should have good flexibility and good corrosion resistance. It is usually made of PTFE, rubber and other materials. The bottom part of the diaphragm with mesh holes on both sides of the diaphragm is provided to prevent excessive deformation of the diaphragm, and is generally called a diaphragm limiter. The pneumatic diaphragm pump has good sealing performance, can easily achieve leak-free operation, and can be used to transport corrosive liquids such as acid, alkali, salt and high viscosity liquid.
Pneumatic diaphragm pumps are used more and more in the chemical industry because of their performance. However, many customers can't get liquids when purchasing pneumatic pumps. Now the use of pneumatic diaphragm pumps is more and more common, so the amount used. It is getting bigger and bigger, but many people buy it and find that many diaphragm pumps can't get liquid. If they are not insiders, they will not be able to repair them. Here I summarize the reasons why the pneumatic diaphragm pump can't get the liquid:
1. Be careful not to reverse the inlet and outlet of the pump. The pump is imported and the outlet is on. The wearing parts of the pneumatic diaphragm pump body are worn out. In this case, it is easier to solve and replace the wearing parts.
2, the origin of the air compressor is too low, the gas volume is insufficient (normal pressure is 5-7 kg); the liquid specific gravity is too large, or the concentration is too large, the pump's suction can not reach, so in this case, the pump is working, But there is no liquid.
3. The air supply pressure of the air inlet is not enough. Generally, the air source pressure range of the domestic pneumatic diaphragm pump is generally 2-7kg. If the pump is larger or smaller than this value, the pump can not work normally; the inlet pipe is not sealed well, so the pump It is normal work, but because the liquid cannot be sucked, the pump can't get liquid.
4. The valve ball and the ball seat of the pneumatic diaphragm pump body are not well sealed, and the liquid that is pumped out is immediately returned to the air. In this case, the pump body is liquid, but the flow rate is small and the lift is very low.
The pneumatic diaphragm pump is a new type of conveying machine that uses compressed air as the power source. It can exhaust all kinds of corrosive liquids, liquid with particles, high viscosity, volatile, flammable and highly toxic liquid. .
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