Diaphragm pumps have been used in petroleum, chemical, food, electronics, ceramics, textile and other system units. According to various special occasions, Xuan is used to extract media that cannot be pumped by conventional pumps. Satisfactory results have been achieved. However, the application potential of the development of pneumatic diaphragm pumps is not known to many people. Diaphragm pump is also called pneumatic double diaphragm pump or pneumatic pump. It is a new type of conveying machine. It uses compressed air as the power source. It is a kind of corrosive liquid, liquid with particles, high viscosity, volatile, flammable and highly toxic liquid. , can be exhausted and exhausted.
Diaphragm pumps are available in four materials: plastic (polypropylene, Kynar and conductive acetal), aluminum alloy, cast iron, and stainless steel. According to different liquid medium, nitrile rubber, neoprene rubber, fluororubber, polytetrafluoroethylene and polytetraethylene ethylene are respectively used. 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.
Due to the remarkable characteristics of pneumatic diaphragm pumps, they have been gradually invading the market of other pumps and occupying some of them. Such as: paints, coatings and other fine chemical industries and ceramics in the diaphragm pump has occupied an absolute dominant position, while in other industries, such as environmental protection, wastewater treatment, construction, sewage and other industries are expanding its market share, and Has an irreplaceable position with other pumps.
The working principle of the diaphragm pump:
The diaphragm pump is driven by compressed air. Directional air distribution valves and pilot valves, referred to as "air chambers", are located at the center of the pump. The medium flows through the two manifolds and the outer diaphragm chamber, called the "media chamber." Usually a check valve (ball or sheet) is placed at the top or bottom of each outer diaphragm chamber or shares a manifold. The two outer diaphragm chambers are connected by a suction port and an outlet joint, and the pump is self-priming.
In operation, the air distribution valve alternately controls the boost of each diaphragm. After each stroke, the valve will automatically change position, allowing air to be switched to another diaphragm chamber, causing alternating aspiration and pressure feed strokes on both diaphragm chambers, diaphragm moving in parallel path, air valve oil-free lubricant demand This is the preferred mode of operation; clean, dry air improves pump performance.
When the medium passes through the diaphragm pump, the check valve opens and closes, which causes each outer diaphragm chamber to be alternately filled and discharged, and the check valve reacts to the pressure difference. The ball valve check valve handles media with small particles, while the plate valve check valve handles media with soft particles close to the pipe size.
When the air distribution valve allows compressed air to enter the left diaphragm chamber, the diaphragm is pushed out to form a pressure feed stroke, and the medium in the pressure feed portion is forced to leave the left outer diaphragm chamber, the check valve, the manifold, and then the pump. The outlet flows out, and the discharge port position can be the top, the bottom, or the side. When the left diaphragm chamber is pushed out, the diaphragm connecting rod is internally dragged and the right diaphragm is retracted inwardly to return the check valve to be filled with fluid. After this cycle is completed, the air distribution valve will automatically change position to switch the air to another In a diaphragm chamber, the above-mentioned cyclic action is repeated in the reverse direction, that is, the diaphragm chambers on both sides will thus exhibit alternating pressure and absorption liquid actions.
Advantages of diaphragm pumps:
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, diaphragm pump can be used to transport fluids with relatively unstable chemical properties, such as: photosensitive materials, flocculation liquids, etc. This is because the pneumatic pump has a low shear force and a small physical impact on the material.
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 diaphragm pump can pass through the particles and the flow rate is adjustable, and the pipe will automatically stop to be unobstructed when the pipe is blocked.
4. In addition, the pneumatic diaphragm pump is small in size and easy to move. It does not require 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 materials can be completely separated from the outside, or in some tests, no impurities will be contaminated.
6. In the flammable and explosive environment, the diaphragm pump is reliable and low in cost, such as the transportation of fuel, gunpowder and explosive. Because: first, it is impossible to generate spark 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.
Our Heterocyclic Compounds has been developing from 2015 year, it is a relatively new class of compounds in our company. Our heterocyclic compounds conducted by a dedicated research and development teams. The R & D team focused on researching heterocyclic compounds, other products are performed by other technical team. Our goal is to catch up with the industry's professional heterocyclic manufacturer. At present our products are mainly composed of pyridine, pyrimidine, thiazole. In addition to our regular products, we accept any form of customized services, to undertake from grams to tons of production. After receiving inquiry, we will give a quotation within 2 working days with coa specifications,If you have special requirements, please provide details in the mail, we will combine the specific requirements and provide an accurate accounting of the costs of the offer. Under normal circumstances, we have the longest production cycle is not more than 45 days.
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