The relationship between the pump valve and the rubber diaphragm

Where there is a pump, the valve is inseparable, and where there is a pump valve, the diaphragm is inseparable. What kind of connection is between the pump, the valve and the diaphragm? Before talking about the connection, it is necessary to popularize it with everyone. The basic knowledge of lower pumps, valves, and rubber diaphragms is like learning arithmetic, you must first understand numbers

There are many kinds of pumps, including water pumps, oil pumps, and air pumps. According to the driving method and working principle, they can also be divided into electric type, power type, centrifugal type, etc. The pumps we often see for watering and irrigation belong to water pumps, and The total output of pumps accounts for more than half of all pumps

Although there are many types of pumps, their functions are all the same: they are used to transport or pressurize fluid (the fluid can be liquid or gas), and when it comes to the machinery used to transport fluid, the Chinese waterwheel has a longer history. It existed in the 1st century AD, and the flow rate, head, and speed are the main criteria to distinguish the performance of the pump.

Pumps are used to transport and pressurize fluids. Yes, the function is relatively simple, but many functions are realized by transporting and pressurizing fluids, such as the hydraulic system of excavators, the opening and closing of aircraft wings, and the ups and downs of submarines. And so on, and said that the understanding of the pump is a little more, and the realization of these functions has higher requirements on the sealing performance of the rubber diaphragm. If the sealing performance is not good, it will affect the performance of the product.

Next, let’s talk about valves, which can be divided into: drain valve, exhaust valve, oil drain valve, and drain valve according to the different conveying medium. According to their functions, they can be divided into: shut-off valve used for opening and closing, which is the simplest one. , but the larger the diameter of the valve, the more difficult it is to open and close. There are also check valves to prevent fluid backflow, and pneumatic vacuum valves and vacuum ball valves used in vacuum systems. According to the driving principle, they can be: manual, pneumatic , electromagnetic, electric, turbine, etc.,

Although there are many kinds, but the functions are similar, they can be summarized as: used to open and close, control the pressure, flow direction and speed, flow and pressure of the fluid

Different types of valves have slightly different structures, but all have the same basic requirements: tightness is an important indicator of valve performance, and fluid cannot overflow when closed, which is more important for flammable, explosive, and toxic media. , the consequences of even a little leakage are unimaginable. Second, it is resistant to wear and tear, and it will be broken if it cannot be switched on and off a few times. This is also the most basic requirement for manufacturers of rubber diaphragms. In addition, in the later use, special attention should be paid to these two points. It is necessary to do frequent sealing tests, and anti-rust treatment,

Before talking about the diaphragm, let's talk about the development trend of the pump valve. Due to the influence of its own material (mostly metal) and the working environment, the pump valve will inevitably experience corrosion, wear and other conditions that affect the performance of the product. Finally, Having to replace the equipment has caused a waste of funds for the enterprise, and also caused a waste of the utilization of resources. In this context, new pump materials such as ceramics and plastics have become a new trend in the development of the industry, which is also a European and American brand. Competitive reasons, not only because of low cost, but also more durable than general pump body materials

Finally, I talked about the diaphragm. I have given you a popular science article about the rubber diaphragm. I believe that everyone has a good understanding of the diaphragm. In fact, the diaphragm is not only used in the pump valve and other mechanical industries, but also in the horn and air purifier. You can also see its shadow, and for the pump valve, no matter what the fluid medium is, as long as there are openings and closings, there must be leakage problems of different degrees, and the existence of the diaphragm, in addition to adjusting the pressure/flow, shock absorption The most basic and most important function is to solve the problem of sealing, and the different materials used, such as nylon, cotton canvas, stretch cloth, polyester cloth, etc., are used to make the diaphragm achieve the same performance in different working environments. Different properties such as flexibility, high pressure resistance, corrosion resistance, tear resistance, etc.