Balanced direct-acting type surge relief valve

Abstract

The invention discloses a balanced direct-acting type surge relief valve. A sleeve (3) is arranged on a valve seat (2) in a valve body (1), the sleeve (3) is positioned by a valve deck (9), an overflow hole for connecting an inlet end (1.1) with an outlet end (1.2) is formed in the side wall, close to one end of the valve seat (2), of the sleeve (3). A sealed adjusting cylinder (4) corresponding to the inlet end (1.1) of the valve body (1) is arranged in the sleeve (3). The inlet end (1.1) and the outlet end (1.2) are connected or disconnected when the adjusting cylinder (4) moves up and down. A piston cylinder (7) is mounted on the inner side, close to the valve body (1), of the valve deck (9). A piston (6) is arranged in the piston cylinder (7). The adjusting cylinder (4) is connected with the piston (6) through a valve rod (5). One end of a communicating pipe (8) is connected with the valve rod (5), and the other end of the communicating pipe (8) penetrates the valve deck (9), extends out of the outer side of the valve deck (9) and is connected with a buffer device. The balanced direct-acting type surge relief valve has the beneficial effects that the surge relief valve is capable of being suitable for the large-calibre high-pressure working conditions, real-time fast opening can be achieved when the water attack happens, stable, controllable and slow closing can be achieved after pressure relief is completed, and safe and effective operation of a pipe network system can be guaranteed.

Description

technical field [0001] The invention relates to a valve, in particular to a water hammer direct-acting discharge valve with a balance sleeve structure. Background technique [0002] In the operation of the pipe network system, especially the long-distance pipe network system, there is a risk of water hammer due to sudden changes in the pressure in the pipe. speed. In the prior art, the valves used for water hammer protection of the pipe network mostly adopt the pilot-operated structure of the main valve and the pilot valve. pressure, it cannot be opened immediately in real time, and there is a risk of water hammer damage. There is also a spring direct acting type, which is sensitive in operation and quick in response. However, since the spring acts directly on the valve plate, it is only suitable for working conditions with low pressure and small caliber. When the system pressure is high and the valve caliber is large, multiple valves are required. Thick springs, bulky st...

AI Technical Summary

Problems solved by technology

In the prior art, the valves used for water hammer protection of the pipe network mostly adopt the pilot-operated structure of the main valve and the pilot valve. pressure, it cannot be opened immediately in real time, and there is a risk of water hammer damage

There is also a spring direct acting type, which is sensitive in operation and quick in response. However, since the spring acts directly on the valve plate, it is only suitable for working conditions with low pressure and small caliber. When the system pressure is high and the valve caliber is large, multiple valves are required. Thick springs, bulky structure, and multi-spring linkage, poor adjustability, and larger calibers are almost impossible to produce

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