CN216200662U

CN216200662U - Piston type hydraulic pressure reducing valve

Info

Publication number: CN216200662U
Application number: CN202122663910.6U
Authority: CN
Inventors: 唐卫国
Original assignee: Hunan Quanwei Valve Co ltd
Current assignee: Hunan Quanwei Valve Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-05
Anticipated expiration: 2031-11-03

Abstract

The utility model relates to a novel piston type hydraulic pressure reducing valve, belonging to the field of valves; the valve comprises a valve body, a water inlet and a water outlet, wherein a valve port is arranged between the water inlet and the water outlet, a valve core consists of a valve clack, a piston rod and a piston, the valve core is arranged in a piston seat, and the piston seat is fixedly connected with the valve body; the upper part of the piston and the piston seat form a first cavity which is communicated with the water outlet; the piston seat is characterized in that a piston hole is further formed in one end of the valve clack, the valve clack and the piston hole form a second cavity in the piston hole, and the valve clack is provided with a water through hole communicated with the two ends. The two ends of the valve clack are communicated, so that the pressure reduction ratio can be greatly improved under the condition of large valve diameter, and the theoretical pressure reduction ratio can reach more than 100; the utility model has simple structure, reliable work and low cost, can be widely applied to the industries of water supply, hydropower stations, petroleum, chemical industry and the like, and has good market prospect.

Description

Piston type hydraulic pressure reducing valve

Technical Field

The utility model relates to a novel piston type hydraulic pressure reducing valve, and belongs to the field of valves.

Background

The hydraulic pressure reducing valves commonly used at present mainly comprise two types, namely a proportional pressure reducing valve and a pilot pressure reducing valve; the proportional pressure reducing valve is generally a piston type, has the advantages of large and accurate pressure reducing ratio, long opening and closing stroke, simple structure and low cost, has the defects of small valve diameter, large volume increase when the valve diameter is increased and large cost increase, and is generally used for reducing pressure on a branch pipe; the pilot-operated type pressure reducing valve is generally of a diaphragm type, has the advantages of large valve diameter, quick response and good pressure stability, and has the defects of small pressure reducing ratio, small opening and closing stroke, complex and easy blockage of a pressure regulating pipeline and high cost, and generally adopts pressure reduction on urban main pipe water supply and pressure reduction on high-rise partition water supply.

Disclosure of Invention

The utility model provides a novel hydraulic pressure reducing valve aiming at the defects that the valve diameter and the pressure reducing ratio cannot be considered simultaneously in the prior art and the like.

A novel piston type hydraulic pressure reducing valve comprises a valve body, a water inlet and a water outlet, wherein a valve port is arranged between the water inlet and the water outlet, a valve core consists of a valve clack, a valve rod and a piston, the valve core is arranged in a piston seat, the piston seat is fixedly connected with the valve body, the upper part of the piston and the piston seat form a first cavity, and the first cavity is communicated with the water outlet; the piston seat is characterized in that a piston hole is further formed in one end of the valve clack, the valve clack and the piston hole form a second cavity in the piston hole, and the valve clack is provided with a water through hole communicated with the two ends.

Compared with the prior art, the utility model has the beneficial effects that: the two ends of the valve clack are communicated, the pressure acting forces at the two ends of the valve clack are opposite in direction, acting forces with equal sectional areas are offset, the actual effective acting force is related to the sectional area of the piston rod and is unrelated to the size of the valve clack, so that the valve diameter can be greatly improved, and the decompression ratio can be greatly improved under the condition of equal valve diameter; the decompression precision is good, and the larger the decompression ratio is, the higher the decompression precision is; the piston structure has long opening and closing stroke; the control pipeline has no adjusting element, so that blockage is effectively prevented, and the stability and the reliability are improved; simple structure and low cost.

Drawings

FIG. 1 is a front sectional view of a structure according to an embodiment of the present invention.

Fig. 2 is a front sectional view of a piston seat according to an embodiment of the present invention.

Fig. 3 is a main sectional view of the valve cartridge of the present invention.

FIG. 4 is a front sectional view of a second structure of the embodiment of the present invention.

Fig. 5 is a main sectional view of a valve body according to an embodiment of the present invention.

In the figure: 1-a valve body, 1 a-a water inlet, 1 b-a water outlet, 1 c-a valve port, 1 d-a water through hole II, 2-a piston seat, 2 a-a piston hole I, 2 b-a piston hole II, 2 c-a water through hole I, 3-a valve core, 3 a-a valve clack, 3 b-a piston, 3 c-a piston rod, 3 d-a water through hole III, 4-a bolt, 5-a first cavity, 6-a second cavity and 7-a connecting pipe.

Detailed Description

The utility model is further explained by combining the drawings in the specification and provides an embodiment of the utility model.

The first embodiment is as follows: referring to fig. 1, 2 and 3, the novel piston type hydraulic pressure reducing valve comprises a valve body 1, a water inlet 1a and a water outlet 1b, wherein a valve port 1c is arranged between the water inlet 1a and the water outlet 1b, and a limber hole II 1d is arranged at the end of the water outlet 1 b; the valve core 3 comprises a valve clack 3a, a piston rod 3c and a piston 3b, and a piston hole I2 a, a piston hole II 2b and a water through hole I2 c are arranged in the piston seat 2; the valve core 3 is arranged in the piston seat 2, the piston seat 2 is fixedly connected to the valve body 1 through a bolt 4, the upper end of a piston 3b and a piston hole I2 a form a first cavity 5, and the valve clack 3a and a piston hole II 2b form a second cavity 6; the water through hole I2 c is communicated with a water through hole II 1d on the valve body 1 through a connecting pipe 7; the valve clack 3a is provided with a water through hole III 3d communicated with the two ends.

The working process is as follows: when water is used, the pressure of the water outlet 1b is reduced, the pressure of the first chamber 5 communicated with the water outlet 1b is reduced, the valve clack 3a moves upwards under the pushing of the water pressure of the water inlet 1a, and the valve core 3 is opened; when the water outlet 1b stops using water, the pressure of the water outlet 1b rises under the action of the pressure of the water inlet 1a, the pressure of the first chamber 5 rises, the valve clack 4 is pushed by the piston 3b to move downwards, and the valve core 3 is closed; the opening degree of the valve core 3 is increased when the pressure of the water outlet 1b is reduced, and is reduced when the pressure of the water outlet 1b is increased, so that the water pressure of the water outlet 1b is automatically adjusted.

The second cavity 6 is communicated with the valve port 1c through a limber hole III 3d in the opening and closing states, the directions of pressure acting forces at the two ends of the valve clack are opposite, and the actual acting force is only related to the sectional area difference at the two ends of the valve clack 3a, namely the sectional area of the piston rod 3c and the valve clack 3 a; the ratio of the piston sectional area to the piston rod sectional area is the decompression ratio.

The embodiment is mainly used for horizontal installation in pipelines.

Example two: referring to fig. 3, 4 and 5, the novel piston type hydraulic pressure reducing valve comprises a valve body 1, a water inlet 1a and a water outlet 1b, wherein a valve port 1c is arranged at the inner end of the water inlet 1a, a valve core 3 comprises a valve clack 3a, a piston rod 3c and a piston 3b, and a piston hole I2 a, a piston hole II 2b and a water through hole I2 c are arranged in a piston seat 2; the valve core 3 is arranged in the piston seat 2, and the piston seat 2 is fixedly connected in the valve body 1; the right end of the piston 3b and the piston hole I2 a form a first cavity 5, and the valve clack 3a and the piston hole II 2b form a second cavity 6; the limber hole I2 c is communicated with the water outlet 1 b; the valve clack 3a is provided with a water through hole III 3d communicated with the two ends.

The working process of the embodiment refers to the first embodiment, and the first embodiment is mainly used for pipeline neutral installation.

Claims

1. A novel piston type hydraulic pressure reducing valve comprises a valve body, a water inlet and a water outlet, wherein a valve port is arranged between the water inlet and the water outlet, a valve core consists of a valve clack, a valve rod and a piston, the valve core is arranged in a piston seat, the piston seat is fixedly connected with the valve body, the upper part of the piston and the piston seat form a first cavity, and the first cavity is communicated with the water outlet; the piston seat is characterized in that a piston hole is further formed in one end of the valve clack, the valve clack and the piston hole form a second cavity in the piston hole, and the valve clack is provided with a water through hole communicated with the two ends.