CN212584338U

CN212584338U - Slow-closing check valve

Info

Publication number: CN212584338U
Application number: CN202021161044.XU
Authority: CN
Inventors: 项有钤; 项光宽; 项光远; 梁鸿铭
Original assignee: Zhejiang Longzhu Valve Technology Co ltd
Current assignee: Zhejiang Longzhu Valve Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-02-23
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a slowly close formula check valve, including valve body and valve gap, its characterized in that: the valve body is internally provided with a valve rod, a spring and a valve clack which are axially movable relative to the valve body, and is also provided with a buffer cylinder for slowly opening and slowly closing; the utility model discloses the valve, simple structure, the speed of opening and closing of buffer valve rod restriction valve clack through installing the cushion chamber on the valve body realizes slowly opening and slowly closing of valve, alleviates the valve clack and strikes the valve body and produce wearing and tearing, the utility model valve no matter to slowly opening or slowly close all has fabulous control effect, and the structure is very simple, and operational mode is also very convenient, can adapt to the requirement of various differences, has very big spreading value.

Description

Slow-closing check valve

Technical Field

The utility model relates to the technical field of valves, more specifically say that it relates to a slowly-closed check valve.

Background

The check valve (also called check valve) is a valve which automatically opens and closes a valve flap by the flow of a medium and is used for preventing the medium from flowing backwards, and is also called a check valve, a one-way valve, a counter-flow valve and a back pressure valve. The structure of current check valve is introduced as the chinese utility model patent of the name "a novel slowly-closed check valve" of patent number "201420340866.2", this valve is by the main valve, one-way check valve, needle type governing valve and ball valve are constituteed, the main valve is including the valve body, the valve clack, valve rod and valve gap, valve rod one end is connected with the valve clack, valve clack upper end and valve gap lower part space are the main valve control room, the valve clack upper end is provided with the diaphragm, it is provided with one-way check valve and needle type governing valve to be connected between valve body import and main valve control room, it is provided with the ball valve to be connected between valve body export and main valve control room. The check valve achieves the aim of slow closing by controlling the water pressure in the control chamber of the main valve. However, the pipeline of the valve structure is complex, and the valve structure relates to a pipeline communication structure of the main valve inlet, the main valve control chamber and the main valve outlet, and the control of slow opening is not good in the actual operation process.

SUMMERY OF THE UTILITY MODEL

The utility model provides a slowly close formula check valve, its simple structure, safe and reliable, no matter to slowly opening or slowly close all have fabulous control effect, the mode of operation is also very convenient, can adapt to the requirement of various differences, has very big spreading value.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a slowly close formula check valve, includes valve body and valve gap, its characterized in that: a valve rod is arranged in the valve body, an I-shaped valve clack for sealing is arranged on the valve rod, and a spring for resetting the valve clack is arranged between the valve clack and the valve cover in a butting manner; the valve body is provided with an opening in the axial direction of the valve rod, the buffering cylinder is arranged in the threaded connection mode, the inner cavity of the buffering cylinder is a buffering cavity and is arranged right on the end face of the valve rod, the buffering valve rod and the piston are fixedly connected with the valve rod, the piston is arranged in the buffering cavity on the buffering valve rod in a sleeved mode, the buffering cylinder is provided with a pressure relief hole right in the opening direction of the inner cavity of the valve body, and a plurality of small holes used for pressure relief are formed in the.

As a further arrangement of the above scheme, the valve rod and the buffer valve rod are in threaded connection.

As a further arrangement of the scheme, at least two pressure relief holes are formed, and when the piston rises, the medium in the valve body can be injected into the buffer cavity through the pressure relief holes.

As a further arrangement of the above scheme, the diameter of the small hole is smaller than the pressure relief hole and is at least one smaller than the pressure relief hole.

As a further arrangement of the scheme, the buffer cylinder can be detached, replaced and quickly maintained through threads.

Through the setting, the utility model discloses the valve, simple structure, through the opening and closing speed of the buffer valve rod restriction valve clack of installing the cushion chamber on the valve body, realize slowly opening and slowly closing of valve, alleviate the valve clack and strike the valve body and produce wearing and tearing, the utility model valve has fabulous control effect no matter to slowly opening or slowly closing, and the structure is very simple, and operational mode is also very convenient, can adapt to the requirement of various differences, has very big spreading value.

Drawings

FIG. 1 is a schematic view of the valve closing state of the embodiment of the present invention;

fig. 2 is a schematic view of the valve opening state according to the embodiment of the present invention.

Reference numerals: 1. a valve body; 2. a valve cover; 3. a valve stem; 31. a cushion valve stem; 4. a valve flap; 5. a buffer chamber; 51. a cushion cylinder; 6. a piston; 7. a spring; 8. a pressure relief vent.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a slow-closure check valve, as shown in fig. 1-2, a slow-closure check valve, including valve body 1 and valve gap 2, its characterized in that: a valve rod 3 is arranged in the valve body 1, an I-shaped valve clack 4 for sealing is arranged on the valve rod 3, and a spring 7 for resetting the valve clack 4 is arranged between the valve clack 4 and the valve cover 2 in a butting manner;

the valve body 1 is equipped with the opening on the valve rod 3 axial, and threaded connection is provided with cushion cylinder 51, the inner chamber of cushion cylinder 51 is buffer chamber 5 and just to 3 terminal surfaces of valve rod setting, still including the buffer valve rod 31 with 3 fixed connection of valve rod and establish the piston 6 that is located buffer chamber 5 on the buffer valve rod 31 with the cover, the cushion cylinder 51 is just being equipped with pressure release hole 8 to 1 inner chamber opening direction of valve body, be provided with a plurality of apertures that are used for the pressure release on the piston 6.

As a further arrangement of the above solution, the valve rod 3 and the buffer valve rod 31 are connected by screw threads.

As a further arrangement of the above scheme, there are at least two pressure relief holes 8, and when the piston 6 rises, the medium in the valve body 1 can be injected into the buffer cavity 5 through the pressure relief holes 8.

As a further arrangement of the above scheme, the diameter of the small hole is smaller than that of the pressure relief hole 8, and is at least one smaller than that of the pressure relief hole 8.

As a further arrangement of the above solution, the cushion cylinder 51 can be replaced by screw-threaded removal for quick maintenance.

Through the arrangement, when water comes from the water inlet end of the valve, the pressurized water flows into the buffer cavity and impacts the valve clack through the pressure relief hole, when the water pressure is greater than the self weight of the spring and the valve clack, the valve clack moves upwards to relieve the sealing of the valve, and the pressure relief hole drains water and relieves pressure based on the buffer cavity, the piston with the hole moves upwards at a constant speed, so that the slow opening is realized;

when the water inlet end loses pressure, the force applied to the valve clack is reduced, the valve clack is driven to return and seal the valve by the resilience force of the spring and the gravity of the valve clack, water below the piston slowly flows out based on the small hole of the piston, and the valve rod is limited by the uniform motion of the piston and is slowly closed under the resilience force of the spring.

This practical valve is to slowly opening or slowly closing all has fabulous control effect, and the structure is very simple, and the mode of operation is also very convenient, can adapt to the requirement of various differences, has very big spreading value.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a slow-closure check valve, includes valve body (1) and valve gap (2), its characterized in that: a valve rod (3) is arranged in the valve body (1), an I-shaped valve clack (4) used for sealing is arranged on the valve rod (3), and a spring (7) used for resetting the valve clack (4) is arranged between the valve clack (4) and the valve cover (2) in a butting manner;

the valve body (1) is equipped with the opening on valve rod (3) axial, and threaded connection is provided with cushion cylinder (51), the inner chamber of cushion cylinder (51) is cushion chamber (5) and just to valve rod (3) terminal surface setting, still including with valve rod (3) fixed connection's cushion valve rod (31) and cover establish piston (6) that lie in cushion chamber (5) on cushion valve rod (31), cushion cylinder (51) just are equipped with pressure release hole (8) to valve body (1) inner chamber opening direction, be provided with a plurality of apertures that are used for the pressure release on piston (6).

2. A slow closing check valve as defined in claim 1, wherein: the valve rod (3) is in threaded connection with the buffer valve rod (31).

3. A slow closing check valve as defined in claim 1, wherein: the number of the pressure relief holes (8) is at least two, and when the piston (6) rises, a medium in the valve body (1) can be injected into the buffer cavity (5) through the pressure relief holes (8).

4. A slow closing check valve as defined in claim 3, wherein: the diameter of the small hole is smaller than that of the pressure relief hole (8) and is at least one less than that of the pressure relief hole (8).

5. A slow closing check valve as defined in claim 1, wherein: the buffer cylinder (51) can be disassembled and replaced through threads for quick maintenance.