Working principle of pneumatic diaphragm pump

The pneumatic diaphragm pump is a new type of conveying machine and is the most innovative type of pump in China. Using compressed air as the power source, for various corrosive liquids, liquid with particles, high viscosity, volatile, flammable, highly toxic liquid, can be exhausted. The pneumatic diaphragm pump is available in four materials: plastic, aluminum alloy, cast iron, and stainless steel. The diaphragm pump uses nitrile rubber, neoprene rubber, fluororubber, polytetrafluoroethylene, and polytetraethylene ethylene according to different liquid media. To meet the needs of different users. It is placed in various special occasions to pump the medium that can not be pumped by conventional pumps, and has achieved satisfactory results.

Pneumatic diaphragm pump working principle:

1. Compressed air is the power.

2. It is a volumetric pump caused by the reciprocating deformation of the diaphragm. The working principle is similar to that of the plunger pump. Due to the working principle of the pneumatic diaphragm pump, the pneumatic diaphragm pump has the following characteristics:

(1) The diaphragm pump will not overheat: the compressed air is used as the power, and it is a process of expansion and heat absorption when exhausting. The temperature of the pneumatic pump is reduced when working, and no harmful gas is discharged.

(2) No sparks will be generated: Lishen pneumatic diaphragm pump does not use electric power for power, and prevents static sparks after grounding.

(3) It can pass through the liquid containing particles: because it is volumetric and the inlet is a ball valve, it is not easy to be blocked.

(4) The shearing force on the material is extremely low: how to suck in when working, so the agitation of the material is minimal, suitable for the transport of unstable materials.

(5) The flow rate can be adjusted, and a throttle valve can be added at the material outlet to adjust the flow rate.

(6) It has the function of self-priming.

(7) It can be run empty without danger.

(8) You can work diving.

(9) The fluids that can be transported are extremely wide, from low viscosity to high viscosity, and viscous from corrosive.

(10) There is no complicated control system, no cables, fuses, etc.

(11) Small size, light weight and easy to move.

(12) It is easy to maintain without lubrication, and it will not pollute the working environment due to dripping.

(13) Diaphragm pumps are always efficient and will not be degraded by wear.

(14) 100% energy utilization, when the outlet is closed, the pump automatically stops, equipment moves, wears, overloads, heat

(15) There is no dynamic seal, and maintenance is easy to avoid leakage. There is no dead point when working.

Pneumatic diaphragm pump for occasions

Due to the above characteristics of the pneumatic diaphragm pump, the diaphragm pump in the world has gradually invaded the market of other pumps since its birth and occupied a part of it. For example, diaphragm pumps in the paint and ceramic industries have taken an absolute dominant position, while in other industries, environmental protection, wastewater treatment, construction, sewage, fine chemicals are expanding their market share, and other pumps are irreplaceable. Status. The advantages of pneumatic diaphragm pumps are:

1. Due to the use of air as the power, the flow rate is automatically adjusted with changes in back pressure (outlet resistance) and is suitable for medium to high viscosity fluids. The working point of the centrifugal pump is set on the basis of water. If it is used for a fluid with a slightly higher viscosity, a reducer or a frequency converter is required, and the cost is greatly improved. The same is true for the gear pump.

2. The use of pneumatic pumps in flammable and explosive environments is reliable and low cost, such as the transportation of fuel, gunpowder and explosives, because: first, it is impossible to generate sparks after grounding; second, no heat is generated during work, the machine does not Will overheat; third, the fluid will not overheat because the diaphragm pump has minimal agitation of the fluid.

3. In places with poor construction sites, such as construction site, industrial and mining wastewater discharge, due to the impurities in the sewage and complex components, the pipeline is prone to blockage, so that the load on the electric pump is too high, the motor is hot and vulnerable. The pneumatic diaphragm pump can pass through the particles and the flow rate is adjustable, and the pipe is automatically stopped to be unobstructed when the pipe is blocked.

4. In addition, the diaphragm pump is small in size and easy to move. It does not require a foundation, and it occupies a very small ground. It is simple and economical to install. Can be used as a mobile material transfer pump.

5. In the treatment of hazardous and corrosive materials, the diaphragm pump can completely separate the material from the outside world.

6, or in some tests to ensure that no impurities contaminated raw materials.

7, can be used to transport fluids with relatively unstable chemical properties, such as: photosensitive materials, flocculation liquids, etc. This is because the diaphragm pump has a low shear force and a small physical impact on the material.

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