Water hammer-resistant constant-pressure pressure reducing valve

Abstract

The invention discloses a water hammer-resistant constant-pressure pressure reducing valve, characterized in that the water hammer-resistant constant-pressure pressure reducing valve is provided with a valve body 1 and a valve body 2 connected with the valve body 1 as a whole. Valve cores are respectively arranged in the inner cavities of the two valve bodies; the valve 1 is a step cylinder with an inner step hole; a valve seat sleeve is screwed in the water inlet at the upstream end; cylinder barrels are respectively arranged in the inner holes at the upstream side and the middle section of the valve body 2; the inner holes at the downstream side are water outlets; the valve core is a sleeve drilled with blind holes at the centre; a piston with the larger diameter is arranged in the middle of the sleeve; a plunger is arranged on the downstream end; the upstream end is provided with a valve clack; the external circle of the sleeve glidingly coordinates with the centre hole corresponding to the valve body 1; the external circle of the middle piston glidingly coordinates with the cylinder barrel at the upstream side of the valve body 2; the outer diameter of the plunger at the downstream end of the sleeve coordinates with the inside diameter of the cylinder barrel at the middle section of the valve body 2 at interval; and a spring is arranged between the middle piston and the valve body 1. The pressure reducing valve does no have a pressure regulating structure, so the pressure reducing valve has simple structure and is maintained conveniently; meanwhile, a damping structure is arranged at the downstream side of the pressure reducing valve so as to effectively control the moving speed of the valve core and prevent the pressure reducing valve damaging when the water hammers occur.

Description

Technical field

[0001] The invention relates to a pressure reducing valve, in particular to a water hammer resistant constant pressure pressure reducing valve. Background technique

[0002] Pressure reducing valves have been widely used in high-rise buildings and other water supply projects, effectively solving the pressure adjustment problem of the water supply system. In recent years, it has rapidly expanded to pipeline direct drinking water systems and municipal water supply projects. The current national "Water supply and drainage design code 》It is stipulated that the inlet pipe with hydrostatic pressure greater than 0.35MPa should be equipped with a pressure reducing valve or a pressure regulating device, such as adding a pressure reducing valve between the direct drinking water or domestic water supply appliance and the water supply pipeline to control the output pressure and flow. The pressure reducing valves currently available on the market have the following problems w...

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