CN113775795A

CN113775795A - One-way back pressure valve

Info

Publication number: CN113775795A
Application number: CN202111050985.5A
Authority: CN
Inventors: 朱宏亮; 马正光; 蒋欣; 邵向涛
Original assignee: Wuxi Rich Intelligent Equipment Co Ltd
Current assignee: Wuxi Rich Intelligent Equipment Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-12-10

Abstract

The invention relates to the technical field of control valves, in particular to a one-way back pressure valve which is simple and compact in structure and low in use cost and comprises a shell with two open ends, wherein one open end of the shell is an inlet, the other open end of the shell is an outlet, and a movable valve core is arranged in the shell.

Description

One-way back pressure valve

Technical Field

The invention relates to the technical field of control valves, in particular to a one-way back pressure valve.

Background

The back pressure valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, when the pressure exceeds the force for opening and closing the valve core, the valve core is jacked open to allow gas or liquid to flow through, the guiding and opening force of the valve core is an important part, and in order to ensure the normal use of the back pressure valve, a relatively complex guiding and resetting mechanism is generally arranged, so that the whole back pressure valve is complex in structure and high in use cost.

Disclosure of Invention

In order to solve the problems of complex structure and high use cost of the existing back pressure valve, the invention provides a one-way back pressure valve which is simple and compact in structure and low in use cost.

The technical scheme is as follows: the one-way back pressure valve is characterized in that the valve core is a guide sleeve with a counter bore opened at the back, a base is inserted in the counter bore of the guide sleeve, a spring is arranged between the base and the inner bottom surface of the counter bore, the base is fixed on a bottom plate, the bottom plate is fixed at one end close to the outlet, a circle of through hole is formed in the bottom plate, the front surface of the valve core faces towards the inlet, and a sealing seat matched with the end face of the valve core is installed at the inlet.

The sealing device is further characterized in that a convex ring is arranged at the inlet of the shell, one end of the sealing seat props against the convex ring, and the other end of the sealing seat props against a sealing gasket pressed by the snap spring;

a sealing ring is arranged between the peripheral surface of the base and the inner wall of the counter bore of the guide sleeve;

the base is provided with steps, one end of the spring is connected with the guide sleeve, and the other end of the spring is connected with the step surface of the base;

the bottom plate is pressed tightly through a clamp spring.

After the valve core guiding device is adopted, the valve core is guided through the guide sleeve and the base in a matched mode, the valve core is opened and closed through the spring in the guide sleeve, the valve core guiding device is integrated into a whole, the structure is simple and compact, and the use cost is low.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a base plate.

Detailed Description

See fig. 1, as shown in fig. 2, a one-way back pressure valve, it includes casing 1 with two open ends, the open end of casing 1 is import 2, the open end of the other end is export 3, install movable case in the casing 1, the case is the guide pin bushing 5 that the back opened counter bore 4, base 6 is equipped with in the counter bore 4 interpolation of guide pin bushing 5, be provided with spring 7 between the interior bottom surface of base 6 and counter bore 4, base 6 is fixed in on the bottom plate 8, bottom plate 8 is fixed in and is close to export 3 one end, round through-hole 9 has been seted up on the bottom plate 8, the front of case is towards import 2, import 2 department installs with case terminal surface complex seal receptacle 10.

The inlet 2 of the shell 1 is provided with a convex ring 11, one end of the sealing seat 10 is abutted against the convex ring 11, the other end of the sealing seat is abutted against a sealing gasket 12 pressed by a clamp spring, the clamp spring is not shown in the figure, and only a clamp spring mounting groove I13 is provided.

A sealing ring 14 is arranged between the peripheral surface of the base 6 and the inner wall of the counter bore 4 of the guide sleeve 5, so that gas or liquid is prevented from flowing into the counter bore 4 to influence the spring 7, and the valve core is ensured to be normally opened and closed.

The base 6 is provided with steps, one end of the spring 7 is connected with the guide sleeve 5, and the other end of the spring is connected with the step surface of the base 6, so that the structure is more compact

The bottom plate 8 is also compressed through a clamp spring, the clamp spring is not shown in the figure, only the second clamp spring mounting groove 15 is provided, the bottom plate 8 is in interference fit with the inner wall of the shell 1, one end of the bottom plate abuts against the clamp spring, and the other end of the bottom plate is subjected to the elastic force of the spring 7 to realize position fixing.

The working principle is as follows: in the initial state, the guide sleeve 5 props against the sealing seat 10 under the action of the spring 7 to realize the closing of the valve; when liquid or gas enters from the inlet 2 and the pressure on the end face of the guide sleeve 5 is greater than the elastic force of the spring 7, the liquid or the gas pushes the guide sleeve 5 to move leftwards, a gap appears between the guide sleeve 5 and the sealing seat 10, the gas or the liquid enters the shell 1 from the gap and flows through the through hole 9 on the bottom plate 8, the gas or the liquid goes out from the outlet 3 of the shell 1 to realize conduction, and when the pressure is insufficient, the guide sleeve 5 resets under the elastic force action of the spring 7 to abut against the sealing seat 10 to realize closing. The distance the guide sleeve 5 moves is limited by the bottom plate 8.

Claims

1. A one-way back pressure valve comprises a shell with openings at two ends, wherein one end of the shell is provided with an inlet, the other end of the shell is provided with an outlet, a movable valve core is arranged in the shell, it is characterized in that the valve core is a guide sleeve with a counter bore on the back surface, a base is inserted in the counter bore of the guide sleeve, a spring is arranged between the base and the inner bottom surface of the counter bore, the base is fixed on the bottom plate, the bottom plate is fixed at one end close to the outlet, a circle of through holes are arranged on the bottom plate, the front surface of the valve core faces the inlet, a sealing seat matched with the end face of the valve core is arranged at the inlet, a convex ring is arranged at the inlet of the shell, one end of the sealing seat props against the convex ring, the other end of the sealing seat props against a sealing gasket pressed by the clamp spring, and a sealing ring is arranged between the outer peripheral surface of the base and the inner wall of the counter bore of the guide sleeve.

2. The one-way back pressure valve according to claim 1, wherein the base is provided with a step, one end of the spring is connected with the guide sleeve, and the other end of the spring is connected with the step surface of the base.

3. A one-way back pressure valve according to claim 1, wherein the base plate is compressed by a circlip.