Liquid two-stage constant pressure supply station

Abstract

The invention discloses a liquid two-level constant voltage supplying station which comprises a liquid storage bank and a pressure tank provided with a high-pressure chamber and a low-pressure chamber. A booster pipeline provided with a booster pump and a pressure-regulating pipeline provided with a pressure-regulating valve are connected between the liquid storage bank and the high-pressure chamber of the pressure tank. A piston constant pressure valve is arranged on the portion, at the low-pressure chamber side, of a separating board in the pressure tank. A valve hole is formed in one end, close to the separating board, of a valve body. A pressure spring is located between a piston and a spring seat provided with a through hole. Pressure releasing adjustment of the whole set of system can be achieved only through single level adjustment by the high-pressure chamber, so that fluid impact vibration of the device is avoided and the liquid two-level constant voltage supplying station is simple in structure, stable in pressure and flexible in pressure adjustment.

Description

technical field [0001] The invention relates to a liquid double-stage constant pressure supply station, which belongs to the technical field of hydraulic pressure. Background technique [0002] In the maintenance process of locomotives, it is often necessary to clean the whole or part of the locomotives. In the cleaning equipment, it is necessary to equip a liquid two-stage constant pressure supply station. Existing technology solutions such as figure 1 As shown, its working principle is that when it is necessary to provide liquid supply with two pressures, the liquid in the liquid storage reservoir is drawn from the liquid suction port through the cleaning liquid supply pump, and the liquid in the cleaning liquid pressure tank is pumped through two one-way check valves respectively. The high-pressure chamber and low-pressure chamber supply pressure liquid, and the pressure is adjusted by the pressure regulating valve, and the liquid supply of two different pressures can b...

AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is not only that there are many valves used, but also that the pressure difference between the inlet pressure of the low-pressure chamber and the low-pressure chamber is too large, because the liquid pressure of the liquid supply pump is directly distributed into the low-pressure chamber. If the pressure difference is large, the pressure regulating valve will have a large impact on pressure regulation, and the energy loss will be large. In some cases, it will cause shock and vibration; because the pressure difference between the liquid inlet and the need to be adjusted is too large, the safety valve will also frequently participate in the work, resulting in reduced working life. High failure rate

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