CN210218897U

CN210218897U - Gate valve backflow preventer

Info

Publication number: CN210218897U
Application number: CN201920203315.4U
Authority: CN
Inventors: Cheng Che; 车骋; Mingfei Li; 李明飞; Yingxu Zhang; 张迎旭
Original assignee: TIELING FANATICISM VALVE Co Ltd
Current assignee: TIELING FANATICISM VALVE Co Ltd
Priority date: 2019-02-17
Filing date: 2019-02-17
Publication date: 2020-03-31
Anticipated expiration: 2029-02-17

Abstract

The utility model discloses a gate valve anti-return device, which comprises a pipe, equal fixed mounting has first flange on the lateral wall at pipeline both ends, fixed mounting has fixed pipe on the roof of pipeline, the top flange joint of fixed pipe has the installing frame, and fixed pipe and installing frame communicate each other, be equipped with the movable rod in the fixed pipe, fixed mounting has the valve plate on the diapire of movable rod, and the valve plate runs through the roof of pipeline and extends to in the pipeline, it is equipped with the bull stick to insert on the roof of movable rod, and the bull stick runs through the roof of installing frame and extends to the upside of installing frame, the top fixed mounting of bull stick has the carousel, fixed mounting has sealing device on the lateral wall on movable rod top. The utility model discloses can prevent that the gate valve from being in the outside that flows to the gate valve through movable groove when opening fluid backward flow, improved the leakproofness of gate valve, fixed pipe and installing frame installation are dismantled conveniently, can be convenient carry out maintenance and maintenance to valve plate, seal cover and seal ring, have prolonged the life of gate valve.

Description

Gate valve backflow preventer

Technical Field

The utility model relates to a gate valve technical field especially relates to a gate valve anti-return device.

Background

The gate valve is a valve which is opened and closed by a gate plate and moves along the vertical direction of the axis of a valve seat so as to realize opening and closing actions. The main advantages of the gate valve are smooth flow passage, small fluid resistance and small opening and closing torque. The application of the gate valve on pipelines is wide, the gate valve is suitable for being manufactured into a large-caliber valve, the gate valve is usually used for cutting off fluid, and the gate valve is not suitable for regulating flow.

When the gate valve is in a sealing state, the sealing performance of the gate valve can be ensured mostly, but when the valve plate moves upwards and the gate valve is in an opening state, fluid can flow outwards through a notch at the position of the valve rod, so that the fluid can leak outwards.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the backflow easily occurs when the gate valve is opened in the prior art and leading to fluid leakage, and providing a gate valve backflow preventer.

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

the utility model provides a gate valve anti-reflux device, includes the pipeline, equal fixed mounting has first flange on the lateral wall at pipeline both ends, fixed mounting has fixed pipe on the roof of pipeline, the top flange joint of fixed pipe has the installing frame, and fixed pipe and installing frame communicate each other, fixed intraductal movable rod that is equipped with, fixed mounting has the valve plate on the diapire of movable rod, and the valve plate runs through the roof of pipeline and extends to in the pipeline, insert on the roof of movable rod and be equipped with the bull stick, and the bull stick runs through the roof of installing frame and extends to the upside of installing frame, the top fixed mounting of bull stick has the carousel, fixed mounting has sealing device on the lateral wall on movable rod top.

Preferably, the outer side wall of the opposite side of the fixed pipe and the installation frame is respectively and fixedly provided with a second flange and a third flange, the top wall of the third flange is evenly inserted with a plurality of threaded rods, the threaded rods penetrate through the third flange and the second flange and extend to the lower side of the second flange, and each outer side wall of each threaded rod is in threaded connection with a nut.

Preferably, the top wall of the mounting frame is provided with a movable groove matched with the rotating rod, the outer side wall of the rotating rod is fixedly provided with an annular convex plate, and one end, far away from the rotating rod, of the annular convex plate is inserted into the inner side wall of the movable groove.

Preferably, sealing device includes the annular plate of fixed mounting on the movable rod top lateral wall, fixed mounting has the seal cover on the roof of annular plate, set up the seal groove of mutually supporting with the seal cover on the roof of installing frame inboard.

Preferably, the outer side wall of the rotating rod is uniformly provided with threads, and the top wall of the movable rod is provided with threaded holes in which the rotating rods are meshed with each other.

Preferably, a sealing washer is fixedly mounted on the inner side wall of the sealing groove.

Compared with the prior art, the utility model discloses there is following beneficial effect:

1. when the gate valve is in an open state, the sealing sleeve can seal the movable groove at the top end of the mounting frame, and fluid backflow is prevented from flowing to the outer side of the gate valve through the movable groove when the gate valve is opened, so that the sealing performance of the gate valve is improved, and the practicability of the gate valve is improved;

2. the fixed pipe and the mounting frame are connected through flanges, and the mounting and dismounting are convenient, so that the valve plate, the sealing sleeve and the sealing washer can be maintained and repaired conveniently, and the service life of the gate valve is prolonged.

Drawings

Fig. 1 is a schematic front structural view of a gate valve backflow prevention device provided by the present invention;

fig. 2 is a plan view of a sealing sleeve part structure of a gate valve backflow preventer.

In the figure: the sealing groove comprises a pipeline 1, a first flange 2, a fixed pipe 3, a mounting frame 4, a second flange 5, a third flange 6, a threaded rod 7, a nut 8, a movable rod 9, a valve plate 10, a rotating rod 11, a rotating disk 12, a movable groove 13, an annular convex plate 14, an annular plate 15, a sealing sleeve 16 and a sealing groove 17.

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.

Referring to fig. 1-2, a gate valve backflow preventer comprises a pipeline 1, wherein first flanges 2 are fixedly mounted on outer side walls at two ends of the pipeline 1, the pipeline 1 is convenient to connect, a fixed pipe 3 is fixedly mounted on a top wall of the pipeline 1, a mounting frame 4 is connected to a top end flange of the fixed pipe 3, and the fixed pipe 3 and the mounting frame 4 are communicated with each other.

Fixed pipe 3 and the relative lateral wall of installing frame 4 on respectively fixed mounting have second flange 5 and third flange 6, evenly insert on the roof of third flange 6 and be equipped with a plurality of threaded rods 7, and threaded rod 7 runs through third flange 6 and second flange 5 and extends to the downside of second flange 5, equal threaded connection has nut 8 on the lateral wall of every threaded rod 7, rotate every nut 8 respectively and rotate nut 8 from the lateral wall of threaded rod 7, every threaded rod 7 is taken out respectively to the subdividing, thereby can pull down the installing frame 4 from the top of fixed pipe 3, the installation is dismantled conveniently, thereby can be convenient to valve plate 10, seal cover 16 and seal ring maintain and repair, thereby the life of gate valve has been prolonged.

Be equipped with the movable rod 9 in the fixed pipe 3, fixed mounting has valve plate 10 on the diapire of movable rod 9, and valve plate 10 runs through pipeline 1's roof and extends to in the pipeline 1, it is equipped with bull stick 11 to insert on the roof of movable rod 9, and bull stick 11 runs through the roof of installing frame 4 and extends to the upside of installing frame 4, evenly be equipped with the screw thread on the lateral wall of bull stick 11, set up bull stick 11 intermeshing's screw hole on the roof of movable rod 9,

bull stick

11 and 9 threaded engagement of movable rod, the top fixed mounting of bull stick 11 has carousel 12, set up the movable groove 13 with 11 mutually supporting of bull stick on the roof of installing frame 4, fixed mounting has annular flange 14 on the lateral wall of bull stick 11, and the one end that annular flange 14 kept away from bull stick 11 is inserted and is established on the inside wall of movable groove 13, make bull stick 11 can only rotate.

Fixed mounting has sealing device on the lateral wall on movable rod 9 top, sealing device includes annular plate 15 of fixed mounting on the lateral wall of movable rod 9 top, fixed mounting has seal cover 16 on the roof of annular plate 15, set up the seal groove 17 of mutually supporting with seal cover 16 on the roof of installing frame 4 inboard, remove seal cover 16 to in the seal groove 17, can seal movable groove 13, fixed mounting has seal ring on the inside wall of seal groove 17, can improve the leakproofness, prevent that the fluid from leaking outward because of the backward flow.

In the utility model, the rotary table 12 is rotated, the rotary rod 11 rotates along with the rotary table 12, the rotary rod 11 is in threaded engagement with the movable rod 9, so that the movable rod 9 can be driven to freely move up and down, the valve plate 10 moves along with the movable rod 9, the valve plate 10 is moved to the upper side of the pipeline 1, the pipeline 1 is in an open state, the movable rod 9 and the sealing sleeve 16 are continuously moved upwards, the sealing sleeve 16 is moved into the sealing groove 17, and the movable groove 13 is sealed; when valve plate 10, seal cover 16 and seal ring need be maintained and maintained, rotate each nut 8 respectively and go out nut 8 from the lateral wall of threaded rod 7, take out each threaded rod 7 respectively again to can follow the top of fixed pipe 3 with installing frame 4 and pull down.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A gate valve backflow preventer, comprising a pipe (1), characterized in that: the outer side walls of the two ends of the pipeline (1) are fixedly provided with first flanges (2), a fixed pipe (3) is fixedly arranged on the top wall of the pipeline (1), the top end of the fixed pipe (3) is connected with an installation frame (4) through a flange, the fixed pipe (3) is communicated with the mounting frame (4), a movable rod (9) is arranged in the fixed pipe (3), a valve plate (10) is fixedly mounted on the bottom wall of the movable rod (9), the valve plate (10) penetrates through the top wall of the pipeline (1) and extends into the pipeline (1), a rotating rod (11) is inserted on the top wall of the movable rod (9), the rotating rod (11) penetrates through the top wall of the mounting frame (4) and extends to the upper side of the mounting frame (4), the top end of the rotating rod (11) is fixedly provided with a turntable (12), and the outer side wall of the top end of the movable rod (9) is fixedly provided with a sealing device.

2. The gate valve backflow preventer of claim 1, wherein: fixed pipe (3) and installing frame (4) are fixed mounting respectively on the lateral wall of one side relatively have second flange (5) and third flange (6), evenly insert on the roof of third flange (6) and be equipped with a plurality of threaded rods (7), and threaded rod (7) run through third flange (6) and second flange (5) and extend to the downside of second flange (5), every equal threaded connection has nut (8) on the lateral wall of threaded rod (7).

3. The gate valve backflow preventer of claim 1, wherein: the mounting frame is characterized in that a movable groove (13) matched with the rotating rod (11) is formed in the top wall of the mounting frame (4), an annular convex plate (14) is fixedly mounted on the outer side wall of the rotating rod (11), and one end, far away from the rotating rod (11), of the annular convex plate (14) is inserted into the inner side wall of the movable groove (13).

4. The gate valve backflow preventer of claim 1, wherein: sealing device includes annular plate (15) of fixed mounting on movable rod (9) top lateral wall, fixed mounting has seal cover (16) on the roof of annular plate (15), set up seal groove (17) of mutually supporting with seal cover (16) on the roof of installing frame (4) inboard.

5. The gate valve backflow preventer of claim 1, wherein: the outer side wall of the rotating rod (11) is uniformly provided with threads, and the top wall of the movable rod (9) is provided with threaded holes in which the rotating rods (11) are mutually meshed.

6. The gate valve backflow preventer of claim 1, wherein: and a sealing washer is fixedly arranged on the inner side wall of the sealing groove (17).