Compressor machine|Overview of pneumatic and hydraulic safety valves for air compressors

Sep 06, 2021

The principle of air compressor pneumatic hydraulic safety valve:

The pressure or vacuum value controlled by the hydraulic safety valve is 10% higher than that of the mechanical breathing valve, so it will not operate under normal conditions. The valve uses oil with high boiling point (not easy to volatile in summer), slow evaporation, and low freezing point (not solidified in winter) (such as light diesel, solar oil or transformer oil) as the sealing liquid (referred to as the sealing liquid). This type of valve should generally be installed horizontally in the pipeline.
Hydraulic safety valve is a kind of safety protection valve. Its opening and closing parts are normally closed under the action of external force. When the pressure of the medium in the equipment or pipeline rises and exceeds the specified value, it will automatically open. It is prevented by discharging the medium to the outside of the system. The pressure of the medium in the pipeline or equipment exceeds the specified value. Safety valves belong to the category of automatic valves, which are mainly used in boilers, pressure vessels and pipelines. The control pressure does not exceed the specified value, and it plays an important role in protecting personal safety and equipment operation. According to the opening height of the safety valve disc, it can be divided into a micro-lift safety valve and a full-lift safety valve. The opening stroke height of the micro-lift safety valve is: ≤0.05d0 (minimum discharge throat diameter); the full-lift safety valve is open The height is ≤0.25d0 (minimum discharge throat diameter).Some applications of air compressor pneumatic hydraulic safety valve:
"Pneumatic hydraulic safety valve" is a safety device widely used in hydraulic power systems and hydraulic equipment. It can also be used as a pressure limiting device. It is a special valve. It is different from traditional valves, which use mechanical metal springs as power. , It can only be limited to low and medium pressures. When the pressure limit exceeds 10Mpa, it can only be designed to increase the volume. Therefore, traditional valves must be used for high and ultra-high pressure hydraulic power systems and hydraulic equipment when the pressure is limited. The volume is bulky, the structure is complex, the manufacturing is difficult, and the product cost is high; the fatigue change of the metal spring during use leads to large fluctuations in the pressure limiting parameters, and it must be adjusted frequently to ensure normal use. Due to the high rigidity of the spring material, stainless steel and other anti-corrosion materials cannot be used. Production, the product has poor anti-corrosion ability, and the service life of the valve is not long.
The "pneumatic hydraulic safety valve" uses high-pressure gas as the power source, and uses a design scheme that changes the ratio of the cylinder body and the valve core to the size of the head. The product has a simple structure, small size, and stable pressure limit. It can achieve a pressure from 0.1 Mpa to thousands of Mpa. The pressure is limited, and the product cost is greatly reduced. The specially designed "pneumatic hydraulic safety valve" can also act on the pressure pillar safety valve of the mine hydraulic support system. In the process of bearing the formation pressure, slow pressure relief (that is, the pressure keeps a constant pressure with the change of the formation pressure) and fast pressure relief (that is, the instantaneous pressure relief when the pressure is relieved within one second when the roof is falling) to ensure that the equipment is not damaged and the personnel Safety.
Because the "pneumatic hydraulic safety valve" has two levels (slow and fast) pressure relief function and pressure limiting function from low to super high pressure; it has the advantages of stable and reliable pressure limiting and pressure relief and good anti-corrosion performance. This patented product can Greatly improve and expand the quality and performance of hydraulic power systems and hydraulic equipment and mine support equipment. At the same time, with the development of material technology, better performance and smaller hydraulic product design schemes have become possible. This patented product also has the characteristics of repetitive inflation and repeated use, and its service life is several times that of traditional products.

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