Pressure-regulating device of high-pressure water pump

Abstract

The invention belongs to the technology field of pumps, more particularly relates to a pressure regulating mechanism of a high-pressure pump; the pressure regulating mechanism of the high-pressure pump is provided with a water inlet pipeline and a high-pressure pipeline on a pump shell; an water channel of an opening valve, which is communicated with the bottom of a backwater valve core is arranged on the high-pressure pipeline at the back of a water outlet valve; a top rod on the upper part of the backwater valve core supports the bottom of a backwater valve; the upper part of the backwater valve is communicated with the high-pressure pipeline; the lower part of the backwater valve is pressed on a backwater valve seat; after the backwater valve is opened, the high-pressure pipeline can be communicated with the water inlet pipeline; a lower spring seat, a big pressure regulating spring and a small pressure regulating spring which are sleeved inside and outside, and an upper spring seat, a pressure regulating bolt and a pressure regulating handle are arranged on the upper part of the backwater valve in sequence. The mechanism uses the big pressure regulating spring and the small pressure regulating spring which are sleeved inside and outside, and therefore causes the pump body structure to be compact, greatly enhances the sealing performance of the pump as gaps among each part are provided with sealing rings, improves the convenience of the operation and use of the pump, has quite strong creativity and practicality, and is suitable to be popularized in and applied to the pump-typed products.

Description

Technical field: [0001] The invention belongs to the technical field of high-pressure water pumps, in particular to a pressure regulating mechanism of a high-pressure water pump. Background technique: [0002] At present, in the high-pressure water pump, in order to prevent the high-pressure water pump from being damaged due to the high water pressure in the pump during use, a pressure regulating mechanism is set in the high-pressure water pump to control the rated working pressure or the maximum pressure of the high-pressure water pump. The working pressure is to protect the safety of the high-pressure water pump. The high-pressure water pump adopts a conical or arc surface sealing structure. The seals in the conical or arc surface sealing structure are specially designed and manufactured. This sealing structure is based on years of use. It is found that there are certain defects. First, it is easy to cause leakage in the pressure regulating overflow system. Second, the man...

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Problems solved by technology

[0002] At present, in the high-pressure water pump, in order to prevent the high-pressure water pump from being damaged due to the high water pressure in the pump during use, a pressure regulating mechanism is set in the high-pressure water pump to control the rated working pressure or the maximum pressure of the high-pressure water pump. The working pressure is to protect the safety of the high-pressure water pump. The high-pressure water pump adopts a conical or arc surface sealing structure. The seals in the conical or arc surface sealing structure are specially designed and manufactured. This sealing structure is based on years of use. It is found that there are certain defects. First, it is easy to cause leakage in the pressure regulating overflow system. Second, the manufacturing cost of the pressure regulating and overflow system is relatively high. At the same time, the structure of the pressure regulating mechanism of the high pressure water pump on the market is different. There are built-in and external pressure-regulating springs. The pressure-regulating spring is set according to the needs of use. The volume is relatively large, which makes the overall structure of the high-pressure water pump not compact enough. The pump body is large and inconvenient to carry and operate.

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