Pressure limiting valve capable of adjusting pressure

Abstract

The invention discloses a pressure limiting valve capable of adjusting pressure. The valve comprises a shell, a seal part, a piston, a piston fixed part, an adjusting part and a spring; the shell is provided with a water inlet end and a water outlet end, the seal part is fixed into the shell and is provided with a seal hole, the piston comprises a sliding part, a penetrating part, and a seal partwhich are integrally formed, the penetrating part is arranged on the seal hole in a sliding penetrating manner, when the seal part moves to the limit in a manner of facing water inlet end, the seal hole is closed, the side wall of the piston fixed part is fixed to the inner side wall of the shell, a water inlet hole is formed in the radial end face, a penetrating piston cavity is formed in the axial direction, a limiting protrusion is arranged in the piston cavity, the sliding part is in sealed sliding connection into the piston cavity, one end of the adjusting part is in sealed connection with the piston fixed part, the adjusting part moves back and forth in the direction from the water inlet end to the water outlet end, and the length of the movable cavity in the direction from the waterinlet end to the water outlet end can be adjusted. The spring is contained in the movable cavity. The beneficial effect of adjusting the output pressure of the pressure limiting vale is achieved.

Description

technical field [0001] The invention relates to the field of valve bodies. More specifically, the present invention relates to an adjustable pressure pressure limiting valve. Background technique [0002] In the boiler system, chemical industry and daily water supply pipelines, when the water pressure provided by the external water supply system is high, it is often necessary to install a pressure limiting valve on the pipeline before connecting to the user end or equipment end to reduce the water pressure of the user. It can effectively reduce the pressure in the pipeline system and reduce the bursting of the pipeline caused by excessive pressure, causing unnecessary damage. loss. There are three kinds of pressure limiting valves with pressure output of 350kPa, 500kPa and 600kPa, which are commonly used in domestic and foreign markets. The pressure output of existing pressure limiting valves on the market is only a single pressure, and the structures of pressure limiting...

AI Technical Summary

Problems solved by technology

The pressure output of existing pressure limiting valves on the market is only a single pressure, and the structures of pressure limiting valves with different pressure specifications are also different, resulting in high production costs and high inventory pressure, and must be installed before use. Pre-order pressure limiting valves of corresponding specifications, troubles in customer selection and difficulties in marketing

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