CN211474924U

CN211474924U - Non-rising stem gate valve

Info

Publication number: CN211474924U
Application number: CN201922125061.1U
Authority: CN
Inventors: 洪钦赐; 洪守用
Original assignee: Quancheng Valve Co ltd
Current assignee: Quancheng Valve Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-09-11
Anticipated expiration: 2029-12-02

Abstract

A non-rising stem gate valve comprises a valve body and a valve seat, wherein the top of the valve body is fixedly connected with the bottom of the valve seat, a valve cavity is arranged in the inner cavity of the valve body, a valve plate is inserted in the inner cavity of the valve cavity, a movable cavity is arranged in the inner cavity of the valve plate along the vertical direction of the valve cavity, a valve rod is rotatably connected with the center of the top of the valve seat, a lifting port is arranged at the joint of the valve rod and the top of the valve body, sealing structures are arranged on the left side and the right side of the inner cavity of the lifting port, one end of the valve rod, which extends out of the top of the valve seat, is fixedly connected with a rotating seat, a hinge column is fixedly connected with the left side of the top of the rotating seat, a support rod is fixedly connected with the top of the right side wall of the valve seat, a piston cylinder is, the leakproofness is good and long service life.

Description

Non-rising stem gate valve

Technical Field

The utility model relates to a gate valve technical field specifically is a non-rising stem gate valve.

Background

The non-rising stem gate valve is also called a rotary stem gate valve or a non-rising stem wedge gate valve, a valve rod is connected on a flashboard, the rising and the falling of the flashboard are realized by rotating a hand wheel arranged at the tail end of the valve rod, namely, the rotary motion is changed into the linear motion, the operating moment of the hand wheel is converted into the operating thrust of the flashboard, thereby controlling the on and off of the non-rising stem gate valve, the non-rising stem gate valve has small full-opening fluid resistance and labor-saving opening and closing, can be used under the condition of bidirectional flow of a medium, has no directivity and short structural length, is not only suitable for being used as a valve with small size, but also suitable for making large-sized valves, but the applicant considers that the sealing performance of the joint of the valve plate and the valve seat of the existing non-rising stem gate valve is insufficient, when the valve plate is opened or closed, fluid media in the valve cavity are easy to leak into the valve seat, damage to the non-rising stem gate valve is caused, and the service life of the non-rising stem gate valve is shortened.

The utility model discloses the content

An object of the utility model is to provide a non-rising stem gate valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a non-rising stem gate valve comprises a valve body and a valve seat, wherein the top of the valve body is fixedly connected with the bottom of the valve seat, a valve cavity is formed in an inner cavity of the valve body, a valve plate is inserted in an inner cavity of the valve cavity, a movable cavity is formed in the inner cavity of the valve plate in the direction perpendicular to the valve cavity, a valve rod is rotatably connected to the center of the top of the valve seat, one end, extending out of the bottom of the valve seat, of the valve rod is rotatably connected with the movable cavity, a lifting port is formed in the joint of the valve rod and the top of the valve body, sealing structures are arranged on the left side and the right side of the inner cavity of the lifting port, a rotating seat is fixedly connected to one end, extending out of the top of the valve seat, a hinge column is fixedly connected to the left side of the top of the rotating seat, and one end of the piston rod extending out of the left side wall of the piston cylinder is hinged with the hinge column.

Preferably, the valve seat comprises an upper valve seat and a lower valve seat, the upper valve seat is fixedly connected with the lower valve through a fixing bolt, so that the valve seat can be conveniently detached and installed, and the whole device can be conveniently maintained and replaced.

Preferably, the meter counter is fixedly connected to the left side of the top of the rotating seat and located on the left side of the hinged column, so that the rising height of the valve plate can be accurately known, and the flow of fluid media in the valve cavity is controlled.

Preferably, a metal sealing ring is arranged on the outer wall between the valve plate and the valve cavity, so that the sealing performance between the valve plate and the valve cavity can be improved, and the possibility of fluid medium leakage is reduced.

Preferably, seal structure includes the storage tank, the inner chamber from the top down of storage tank has set gradually O shape sealing washer, metal seal, corrosion-resistant sealing member and elastic component, metal seal and corrosion-resistant sealing member all be the toper, corrosion-resistant sealing member laminate mutually with the surface of valve rod respectively, the elastic component have the motion trend that drive metal seal and corrosion-resistant sealing member are close to the valve rod, can be automatic like this according to radial pressure's change, the sealing performance of control seal structure and valve rod to reduce the gate valve and leak from the valve plate junction, it is sealed effectual.

Preferably, the end of the valve plate extending into the bottom of the inner cavity of the valve cavity is provided with a bulge, and the left side and the right side of the joint of the bulge and the valve cavity are both provided with sealing structures, so that leakage between the valve plate and the bottom of the valve cavity can be reduced, and vertical limiting of the valve plate can be facilitated.

Preferably, the joint of the piston rod and the piston cylinder is provided with a rubber soft sleeve, so that the abrasion to the piston rod can be reduced, and the piston rod is protected.

Preferably, the distance between the rod bottom of the part, extending into the movable cavity, of the valve rod and the bottom of the movable cavity is the same as the diameter of the valve cavity, so that the valve plate is convenient to completely close and open, and leakage of fluid media in the valve cavity is reduced.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a piston that dark pole gate valve set up moves in the piston cylinder, the piston rod is articulated with the hinge post that rotates the seat, the piston rod of motion drives and rotates the seat rotation, through the meter rice ware that sets up can be accurate know the degree that the valve plate was opened or was closed, metal seal spare and corrosion-resistant sealing member all are the toper simultaneously, corrosion-resistant sealing member laminates with the surface of valve rod respectively mutually, the elastic component has the motion trend that drive metal seal spare and corrosion-resistant sealing member are close to the valve rod, can be automatic according to radial pressure's change like this, the sealing performance of control seal structure and valve rod, thereby it leaks from the valve plate junction to reduce the gate valve, it is sealed effectual.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a sectional view of the overall structure of the present invention;

FIG. 3 is an enlarged schematic view of part B of the present invention;

in the figure, 1-valve body; 2-valve seat; 3-valve cavity; 4-a valve plate; 5-rotating the base; 6-meter counter; 7-a hinged column; 8-a support bar; 9-a piston cylinder; 10-a piston; 11-a piston rod; 12-a rubber soft sleeve; 13-metal sealing ring; 14-a valve stem; 15-a movable cavity; 16-a lifting port; 17-a sealing structure; 171-O-ring seal; 172-metal seal; 173-corrosion resistant seal; 174-a resilient member; 175-a container.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: a non-rising stem gate valve comprises a valve body 1 and a valve seat 2, wherein the valve seat 2 comprises an upper valve seat and a lower valve seat, the upper valve seat and the lower valve seat are fixedly connected through a fixing bolt, so that the valve seat 2 can be conveniently detached and installed, the maintenance and part replacement of the whole device are convenient, the top of the valve body 1 is fixedly connected with the bottom of the valve seat 2, a valve cavity 3 is arranged in an inner cavity of the valve body 1, a valve plate 4 is inserted into an inner cavity of the valve cavity 3, a bulge is arranged at one end, extending into the bottom of the inner cavity of the valve cavity 3, of the valve plate 4, sealing structures 17 are arranged on the left side and the right side of the joint of the bulge and the valve cavity 3, leakage between the valve plate 4 and the bottom of the valve cavity 3 can be reduced, vertical limiting of the valve plate 4 can be conveniently performed, a metal sealing ring 13 is arranged on the outer wall between, the inner cavity of the valve plate 4 is provided with a movable cavity 15 along the vertical direction of the valve cavity 3, the center of the top of the valve seat 2 is rotatably connected with a valve rod 14, the distance between the rod bottom of the part of the valve rod 14 extending into the movable cavity 15 and the bottom of the movable cavity 15 is the same as the diameter of the valve cavity 3, so that the valve plate 4 is convenient to be completely closed and opened, the leakage of fluid media in the valve cavity 3 is reduced, one end of the valve rod 14 extending out of the bottom of the valve seat 2 is rotatably connected with the movable cavity 15, the joint of the valve rod 14 and the top of the valve body 1 is provided with a lifting port 16, the left side and the right side of the inner cavity of the lifting port 16 are provided with sealing structures 17, each sealing structure 17 comprises a containing groove 175, the inner cavity of the containing groove 175 is sequentially provided with an O-shaped sealing ring 171, a metal sealing member 172, a corrosion-resistant, the elastic part 174 has the movement trend of driving the metal sealing part 172 and the corrosion-resistant sealing part 173 to be close to the valve rod 14, so that the sealing performance of the sealing structure 17 and the valve rod 14 can be automatically controlled according to the change of radial pressure, thereby reducing the leakage of the gate valve from the joint of the valve plate 4, the sealing effect is good, one end of the valve rod 14 extending out of the top of the valve seat 2 is fixedly connected with the rotating seat 5, the left side of the top of the rotating seat 5 is fixedly connected with the meter counter 6, the meter counter 6 is positioned at the left side of the hinge post 7, so that the rising height of the valve plate 4 can be accurately known, the flow of a fluid medium in the valve cavity 3 can be controlled, the left side of the top of the rotating seat 5 is fixedly connected with the hinge post 7, the top of the right side wall bulge of the valve seat 2 is fixedly connected with the support rod 8, the top of the support rod 8 is fixedly connected, therefore, abrasion to the piston rod 11 can be reduced, the piston rod 11 is protected, and one end, extending out of the left side wall of the piston cylinder 9, of the piston rod 11 is hinged to the hinge column 7.

The working principle is as follows: when the gate valve needs to be opened, the piston 10 in the piston cylinder 9 drives the piston rod 11 to reciprocate, the moving piston rod 11 drives the hinge post 7 to rotate, the rotating post 7 also drives the rotating seat 5 to rotate, the rotating seat 5 drives the valve rod 14 to rotate, the rotating valve rod 14 rotates in the movable cavity 15 of the valve plate 4, the rotation of the valve rod 14 is converted into the linear motion of the valve plate 4, so that the valve plate 4 ascends along the valve rod 14 and enters the valve seat 2 through the lifting port 16, the sealing structures 17 on the left side and the right side of the lifting port 16 play a sealing role on the contact point of the valve plate 4 and the lifting port 16, each sealing structure 17 comprises a containing groove 175, an O-shaped sealing ring 171, a metal sealing element 172, a corrosion-resistant sealing element 173 and an elastic element 174 are sequentially arranged in an inner cavity of each containing groove 175 from top to bottom, each of the metal sealing element 172 and, the elastic part 174 has the movement trend that the metal sealing part 172 and the corrosion-resistant sealing part 173 are driven to be close to the valve rod 14, so that the sealing performance of the sealing structure 17 and the valve rod 14 can be automatically controlled according to the change of radial pressure, the leakage of the gate valve from the joint of the valve plate 4 is reduced, the sealing effect is good, the rising height of the valve plate 4 in the inner cavity of the valve cavity 3 is accurately known through the meter counter 6, the flow of a fluid medium in the valve cavity 3 is better controlled, the valve seat 2 comprises an upper valve seat and a lower valve seat, the upper valve seat is fixedly connected with the lower valve through a fixing bolt, the valve seat 2 can be conveniently detached and installed, and the maintenance and the part replacement of the whole device are.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a non-rising stem gate valve, includes valve body (1) and disk seat (2), its characterized in that: the top of the valve body (1) is fixedly connected with the bottom of the valve seat (2), the valve cavity (3) is formed in the inner cavity of the valve body (1), the valve plate (4) is inserted into the inner cavity of the valve cavity (3), the movable cavity (15) is formed in the inner cavity of the valve plate (4) in the vertical direction of the valve cavity (3), the valve rod (14) is rotatably connected to the center of the top of the valve seat (2), one end, extending out of the bottom of the valve seat (2), of the valve rod (14) is rotatably connected with the movable cavity (15), a lifting port (16) is formed in the joint of the valve rod (14) and the top of the valve body (1), sealing structures (17) are arranged on the left side and the right side of the inner cavity of the lifting port (16), the rotating seat (5) is fixedly connected to one end, extending out of the top of the valve rod (14), the left side of the top of the rotating seat (5) is fixedly connected with, the top rigid coupling of bracing piece (8) has piston cylinder (9), the inner chamber of piston cylinder (9) is provided with piston (10), piston (10) left side articulates there is piston rod (11), and piston rod (11) stretch out the one end of piston cylinder (9) left side wall and articulate mutually with articulated post (7).

2. A non-rising stem gate valve according to claim 1, wherein: the valve seat (2) comprises an upper valve seat and a lower valve seat, and the upper valve seat is fixedly connected with the lower valve through a fixing bolt.

3. A non-rising stem gate valve according to claim 1, wherein: the top left side rigid coupling of rotating seat (5) has meter rice ware (6), and meter rice ware (6) are located the left side of articulated post (7).

4. A non-rising stem gate valve according to claim 1, wherein: and a metal sealing ring (13) is arranged on the outer wall between the valve plate (4) and the valve cavity (3).

5. A non-rising stem gate valve according to claim 1, wherein: seal structure (17) are including storage tank (175), the inner chamber from the top down of storage tank (175) has set gradually O shape sealing washer (171), metal seal (172), corrosion-resistant sealing member (173) and elastic component (174), metal seal (172) and corrosion-resistant sealing member (173) all be the toper, corrosion-resistant sealing member (173) laminate with the surface of valve rod (14) respectively mutually, elastic component (174) have drive metal seal (172) and corrosion-resistant sealing member (173) and be close to the motion trend of valve rod (14).

6. A non-rising stem gate valve according to claim 1, wherein: the valve plate (4) is provided with a bulge at one end extending into the bottom of the inner cavity of the valve cavity (3), and sealing structures (17) are arranged on the left side and the right side of the joint of the bulge and the valve cavity (3).

7. A non-rising stem gate valve according to claim 1, wherein: and a rubber soft sleeve (12) is arranged at the joint of the piston rod (11) and the piston cylinder (9).

8. A non-rising stem gate valve according to claim 1, wherein: the distance between the rod bottom of the part of the valve rod (14) extending into the movable cavity (15) and the bottom of the movable cavity (15) is the same as the diameter of the valve cavity (3).