CN219692294U

CN219692294U - Stop valve

Info

Publication number: CN219692294U
Application number: CN202321207760.0U
Authority: CN
Inventors: 李志朋; 羊山百; 谢奎; 代富阳; 周德胜; 曾燕; 余应洪
Original assignee: Chengdu Xinsanye Technology Co ltd
Current assignee: Chengdu Xinsanye Technology Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-09-15
Anticipated expiration: 2033-05-18

Abstract

The utility model provides a stop valve, and belongs to the technical field of stop valves. The valve rod and the upper valve body are in vertical threaded connection and penetrate through the upper valve body to extend into the lower valve body, the valve clack is arranged at the bottom end of the valve rod and is used for switching on and off a medium runner in the lower valve body, a sealing ring is arranged between the upper valve body and the lower valve body, the sealing ring is connected with the lower valve body through the upper valve body to be pressed and fixed, and the inner wall of the sealing ring is in sealing contact with the outer wall of the valve rod. The advantage that the specific heat capacity of the medium flowing in the stop valve is reached is utilized, the influence of the external environment temperature difference to which the sealing ring is subjected is reduced, and the effect of improving the connection tightness between the valve rod of the stop valve and the upper valve body is greatly achieved.

Description

Stop valve

Technical Field

The utility model relates to the technical field of stop valves, in particular to a stop valve.

Background

The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so that when the valve is closed, pressure must be applied to the valve clack so as to force the sealing surface not to leak. The opening and closing part of the stop valve is a plug-shaped valve clack, the sealing upper surface is a plane or an inclined conical surface, and the valve clack moves through a valve rod which vertically and axially moves on the valve to linearly move along the central line of the valve seat.

The patent of the bulletin number CN207648249U of authorizing discloses a stop valve, which comprises a main body, one side of main part is provided with the water inlet, and the one end fixed mounting of water inlet has the water inlet flange, the opposite side of main part is provided with the delivery port, the one end fixed mounting of delivery port has the delivery port flange, and the one end fixed surface of delivery port installs connection pad, the upper end of main part is provided with the connecting seat No. one, and the upper end fixed surface of the connecting seat No. one installs the connecting seat No. two, be equipped with the ethylene propylene diene monomer rubber pad between connecting seat No. one and the connecting seat No. two.

At present, a flexible graphite gasket is embedded at the top of a valve cover to seal a gap between a valve rod and the valve cover, but the flexible graphite gasket and the valve cover are exposed to the outside and are influenced by temperature difference between day and night, so that the gap is easy to appear among the valve cover, the valve rod and the flexible graphite gasket, and the valve rod also can cause abrasion influence on the flexible graphite gasket after repeated actions.

Disclosure of Invention

In view of the above, the present utility model provides a shut-off valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a stop valve, including last valve body, lower valve body, valve rod and valve clack, go up valve body and lower valve body and pass through bolt fixed connection in order to form the cavity that inside medium flows, valve rod and last valve body vertical threaded connection and pass the valve body and extend into the valve body down, the valve clack setting is used for the medium runner of the internal valve body down of break-make in the bottom of valve rod, upward is provided with the sealing washer between valve body and the lower valve body, is connected in order to hold the sealing washer with lower valve body through last valve body and fixes, the inner wall of sealing washer and the outer wall sealing contact of valve rod.

Further, at least two positioning holes are formed in the sealing ring at intervals along the axial direction of the sealing ring, positioning columns and positioning grooves corresponding to the positioning holes in the sealing ring are respectively arranged on the bottom wall of the upper valve body and the top wall of the lower valve body, and the positioning columns penetrate through the positioning holes and are inserted into the positioning grooves when the upper valve body is connected with the lower valve body.

Further, a relief ring groove is arranged on the top wall of the lower valve body and positioned on the outer side of the cavity, and a protruding ring matched with the relief ring groove is arranged on the bottom wall of the upper valve body in a protruding mode.

Further, the inner ring of the sealing ring is coaxially provided with a divergent part, and the longitudinal section of the divergent part is in a shape of a plurality of sheets with one end integrally connected with the sealing ring and the other end divergently extending.

Further, one side of the sealing ring, which is close to the valve clack, is also provided with a telescopic sealing piece, the telescopic sealing piece is in a bucket shape with a plurality of steps, the outer edge of the telescopic sealing piece is fixedly arranged between the sealing ring and the top wall of the lower valve body, the telescopic sealing piece is made of flexible rubber, and the bottom of the valve rod is provided with a clamping groove for clamping the inner edge of the telescopic sealing piece.

Further, a step is arranged on the outer wall of the valve rod, which is close to the bottom end, a mounting ring is sleeved on the step of the valve rod and is fixed through a bolt, a T-shaped clamping groove is formed by the mounting ring and the step on the valve rod, and a clamping connector with two sides in the shape of an inverted ratchet is fixedly arranged on the inner edge of the telescopic sealing piece, and the telescopic sealing piece is matched with the clamping groove through the clamping connector so as to be connected with the valve rod.

The beneficial effects of the utility model are as follows:

1. the sealing ring in the inner cavity of the stop valve is tightly contacted with the outer wall of the valve rod, the influence of the external environment temperature difference on the sealing ring is reduced by utilizing the advantage that the specific heat capacity of the medium flowing in the stop valve is reached, and the connection tightness between the valve rod of the stop valve and the upper valve body is greatly improved;

2. the telescopic sealing piece is arranged between the bottom end, close to the valve rod, of the stop valve and the joints of the upper valve body and the lower valve body, so that the part, which is used for the relative contact sliding of the upper valve body, of the valve rod can be protected, the part is prevented from being directly contacted with media flowing in the stop valve, and the service life of the valve rod is prolonged.

Drawings

Fig. 1 is a schematic plan sectional structure of a shut-off valve according to an embodiment of the present utility model.

Fig. 2 is an enlarged partial schematic view of the portion a in fig. 1.

Fig. 3 is a schematic diagram of the overall structure of a seal ring according to an embodiment of the utility model.

Fig. 4 is a schematic view of the overall structure of the telescopic sealing member according to the embodiment of the present utility model.

Wherein, 1, upper valve body; 11. a positioning groove; 12. a protruding ring; 2. a lower valve body; 21. positioning columns; 22. a relief ring groove; 3. a valve stem; 31. a clamping groove; 32. a mounting ring; 4. a valve flap; 5. a chamber; 6. a seal ring; 61. positioning holes; 62. a divergent section; 7. a telescoping seal; 71. and a clamping joint.

Detailed Description

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

The embodiment of the utility model discloses a stop valve, referring to figures 1 and 2, comprising an upper valve body 1, a lower valve body 2, a valve rod 3 and a valve clack 4, wherein one end of the lower valve body 2 is provided with a water inlet, the other end is provided with a water outlet, a medium flow passage communicated with the water inlet and the water outlet is arranged in the lower valve body 2, an opening communicated into the medium flow passage is downwards penetrated and arranged on the top wall of the lower valve body 2, the upper valve body 1 is detachably connected onto the top wall of the lower valve body 2 through bolts, a mounting hole for the valve rod 3 to penetrate is vertically penetrated and arranged on the upper valve body 1, and a cavity 5 for medium flow is formed inside after the upper valve body 1 is connected with the lower valve body 2. The valve rod 3 is arranged in the mounting hole in a penetrating way and is in threaded connection with the upper valve body 1, the bottom end of the valve rod 3 extends into the cavity 5 and is in rotary connection with the valve clack 4, and the valve rod 3 is enabled to move along the axial direction by rotating the valve rod 3, so that the valve clack 4 in the cavity 5 is driven to lift, and a medium flow passage in the lower valve body 2 is opened and closed.

A sealing ring 6 is arranged between the upper valve body 1 and the lower valve body 2, the sealing ring 6 is clamped between the upper valve body 1 and the lower valve body 2, and the sealing ring 6 is clamped and fixed between the upper valve body 1 and the lower valve body 2 by means of bolts connected with the upper valve body 1 and the lower valve body 2. The inner wall of the sealing ring 6 is in sealing contact with the outer wall of the valve rod 3, namely, the inner diameter of the sealing ring 6 is not larger than the diameter of the valve rod 3 at the installation position of the sealing ring 6, and the sealing ring 6 is tightly attached to the outer wall of the valve rod 3 in an interference fit mode. The sealing ring 6 can be made of rubber, has a telescopic effect of micro-bullets, and can be used for the valve rod 3 to penetrate through the sealing ring 6 during installation.

Referring to fig. 3, further, in order to ensure that the inner ring of the sealing ring 6 can be accurately positioned with the position of the valve rod 3 to be installed when the sealing ring 6 is installed, at least two positioning holes 61 are formed in the sealing ring 6 at intervals along the axial direction of the sealing ring 6, positioning columns 21 and positioning grooves 11 corresponding to the positioning holes 61 on the sealing ring 6 are respectively formed in the bottom wall of the upper valve body 1 and the top wall of the lower valve body 2, and the positioning columns 21 penetrate through the positioning holes 61 and are inserted into the positioning grooves 11 when the upper valve body 1 is connected with the lower valve body 2. In the embodiment of the present utility model, three positioning holes 61 are provided, the positioning columns 21 are specifically located on the top wall of the lower valve body 2, and the positioning grooves 11 are located on the bottom wall of the upper valve body 1. When the stop valve is installed, the sealing ring 6 is positioned and installed on the lower valve body 2, and after the alignment of the sealing ring 6 is determined, the upper valve body 1 and the valve rod 3 are installed. The sealing ring 6 is arranged in the cavity 5 of the stop valve, and the temperature in the cavity 5 can be maintained stably by utilizing the large specific heat capacity of the medium passing through the stop valve, so that the sealing ring 6 can better seal the installation gap between the valve rod 3 and the upper valve body 1, and the overall sealing performance of the stop valve is improved.

Further, in the embodiment of the present utility model, a relief ring groove 22 is provided on the top wall of the lower valve body 2 at the outer side of the chamber 5, and a protruding ring 12 adapted to the relief ring groove 22 is provided on the bottom wall of the upper valve body 1. The ring groove 22 of stepping down is established on lower valve body 2, when installing sealing washer 6, can not lead to the fact the influence to the location of sealing washer 6, is connecting back with upper valve body 1 and lower valve body 2, utilizes bulge loop 12 to extrude sealing washer 6, improves sealing washer 6 at the area of contact between upper valve body 1, lower valve body 2 to reinforcing is to the centre gripping installation stability of sealing washer 6.

In order to reduce the possibility of gaps between the sealing ring 6 and the valve rod 3 during the movement of the valve rod 3, in the embodiment of the utility model, the inner ring of the sealing ring 6 is coaxially provided with the diverging part 62, the longitudinal section of the diverging part 62 is in a shape of a plurality of sheets, one end of which is integrally connected with the sealing ring 6, and the other end of which divergently extends, and when the valve rod 3 moves, the multi-layer sheets of the diverging part 62 are contacted with the outer wall of the valve rod 3, so that medium gas and the like can be prevented from penetrating into the gaps between the upper valve body 1 and the valve rod 3 due to the larger gaps between the valve rod 3 and the sealing ring 6.

With reference to fig. 4, further, a telescopic seal 7 is provided in the chamber 5 of the shut-off valve between the valve stem 3 and the opening of the top chamber 5 of the lower valve body 2. Specifically, the telescopic sealing piece 7 is made of flexible rubber, the telescopic sealing piece 7 is in a bucket shape with a plurality of steps, and the larger end of the telescopic sealing piece 7 is turned outwards to form a lap joint flanging and is clamped between the upper valve body 1 and the lower valve body 2, and is specifically positioned between the lower valve body 2 and the sealing ring 6. One end of the valve rod 3, which is close to the valve clack 4, is provided with a clamping groove 31 for clamping the inner edge of the inner ring of the smaller end of the telescopic sealing piece 7.

Specifically, a step is formed on the outer wall of the valve rod 3, which is close to the bottom end, a mounting ring 32 is sleeved at the step of the valve rod 3 and fixed through bolts, a T-shaped clamping groove 31 is formed by the mounting ring 32 and the step on the valve rod 3, and a clamping head 71 with two sides in the shape of an inverted ratchet is fixedly arranged on the inner edge of the telescopic sealing piece 7. After the telescopic sealing element 7 and the sealing ring 6 are installed between the upper valve body 1 and the lower valve body 2, the valve rod 3 is installed downwards from the upper valve body 1, after the valve rod 3 passes through the inner ring of the telescopic sealing element 7, the valve rod 3 is pulled reversely, the clamping connector 71 is clamped into the clamping groove 31 on the valve rod 3, and then the connection installation between the telescopic sealing element 7 and the valve rod 3 is completed. When the valve rod 3 moves, the telescopic sealing element 7 can be pulled to be in a bucket shape by utilizing the matching between the clamping groove 31 and the clamping connector 71, and when the valve rod 3 is lifted upwards, the telescopic sealing element 7 can be compressed at each step. Through flexible sealing member 7, can prevent effectively that medium from contacting valve rod 3 and last valve body 1 relative sliding's part, play the guard action to valve rod 3, improve stop valve practical life to the installation is swift convenient.

The implementation principle of the stop valve of the embodiment of the utility model is as follows: by additionally arranging the sealing ring 6 at the joint between the upper valve body 1 and the lower valve body 2 of the stop valve, the sealing ring 6 utilizes the advantage that the specific heat capacity of the flowing medium in the chamber 5 of the stop valve can be reached, the influence of the external environment temperature difference suffered by the sealing ring 6 is reduced, and meanwhile, the sealing ring 6 is tightly contacted with the outer wall of the valve rod 3, so that the connection tightness between the valve rod 3 of the stop valve and the upper valve body 1 is greatly improved.

It will be apparent to those skilled in the art that while preferred embodiments of the present utility model have been described, additional variations and modifications may be made to these embodiments once the basic inventive concepts are known to those skilled in the art. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The utility model provides a stop valve, includes valve body (1), lower valve body (2), valve rod (3) and valve clack (4), go up valve body (1) and lower valve body (2) and pass through bolt fixed connection in order to form inside medium flowing cavity (5), valve rod (3) and last valve body (1) vertical threaded connection and pass in valve body (1) extend into lower valve body (2), valve clack (4) set up in the bottom of valve rod (3) and are used for the medium runner in valve body (2) under break-make, its characterized in that: the valve is characterized in that a sealing ring (6) is arranged between the upper valve body (1) and the lower valve body (2), the sealing ring (6) is pressed and fixed by being connected with the lower valve body (2) through the upper valve body (1), and the inner wall of the sealing ring (6) is in sealing contact with the outer wall of the valve rod (3).

2. The stop valve according to claim 1, wherein the sealing ring (6) is provided with at least two positioning holes (61) at intervals along the axial direction of the sealing ring (6), the bottom wall of the upper valve body (1) and the top wall of the lower valve body (2) are respectively provided with positioning columns (21) and positioning grooves (11) corresponding to the positioning holes (61) on the sealing ring (6), and the positioning columns (21) penetrate through the positioning holes (61) and are inserted into the positioning grooves (11) when the upper valve body (1) is connected with the lower valve body (2).

3. A shut-off valve according to claim 2, characterised in that the top wall of the lower valve body (2) is provided with a relief ring groove (22) on the outside of the chamber (5), and the bottom wall of the upper valve body (1) is provided with a protruding ring (12) protruding therefrom, which is adapted to the relief ring groove (22).

4. A shut-off valve according to claim 1, characterized in that the inner ring of the sealing ring (6) is coaxially provided with a divergent portion (62), the longitudinal section of the divergent portion (62) is in the shape of a plurality of sheets, one end of which is integrally connected with the sealing ring (6) and the other end of which divergently extends.

5. The stop valve according to claim 1, wherein a telescopic sealing piece (7) is further arranged on one side, close to the valve clack (4), of the sealing ring (6), the telescopic sealing piece (7) is in a bucket shape with a plurality of steps, the outer edge of the telescopic sealing piece (7) is fixedly arranged between the sealing ring (6) and the top wall of the lower valve body (2), the telescopic sealing piece (7) is made of flexible rubber materials, and a clamping groove (31) for clamping the inner edge of the telescopic sealing piece (7) is formed in the bottom of the valve rod (3).

6. The stop valve according to claim 5, wherein the outer wall of the valve rod (3) close to the bottom end is provided with a step, a mounting ring (32) is sleeved at the step of the valve rod (3) and fixed by a bolt, a T-shaped clamping groove (31) is formed by the mounting ring (32) and the step on the valve rod (3), and a clamping head (71) with two sides in the shape of an inverted ratchet is fixedly arranged on the inner edge of the telescopic sealing piece (7), and the telescopic sealing piece (7) is connected with the valve rod (3) by matching the clamping head (71) with the clamping groove (31).