CN219035712U

CN219035712U - Butterfly valve expansion joint

Info

Publication number: CN219035712U
Application number: CN202223129163.9U
Authority: CN
Inventors: 张军; 钱炯; 何洁; 张小茜; 陆计良
Original assignee: Anji Guoyuan Water Group Co ltd
Current assignee: Anji Guoyuan Water Group Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-05-16
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a butterfly valve expansion joint, which comprises an expansion joint body arranged at the rear of a butterfly valve along the water flow direction; the telescopic joint body comprises a sleeve disc, a connecting pipe and a gland, wherein the sleeve disc is sleeved on the outer side of the connecting pipe, the gland is pressed on the outer side of the sleeve disc to enable the sleeve disc to seal the connecting pipe, and the sleeve disc is fixedly connected with the gland through a stud and a nut. The telescopic joint body is arranged at the rear of the butterfly valve, so that water flow is prevented from directly impacting the telescopic joint body.

Description

Butterfly valve expansion joint

Technical Field

The utility model relates to the technical field of water supply, in particular to a butterfly valve expansion joint.

Background

At present, in municipal engineering, foundation concrete is poured or embedded in pipelines, in the process that the pipelines are subjected to settlement of building foundations, equipment resonance, geological change and pipeline medium change, the pipeline distribution positions start to be stressed, deform and distort to damage the pipelines, even the embedded pipelines are broken, great inconvenience is brought to construction units, in order to overcome the difficulties, the safe operation of the pipelines is ensured, the problems are generally solved in the prior art by arranging expansion joints on the pipelines, and the expansion joints can axially expand and contract within a certain range, so that various angular displacement, non-concentricity, expansion and expansion of the pipelines are overcome. However, the sealing performance of the expansion joint is generally poor due to the fact that the expansion joint has certain expansion and deformation quantity; meanwhile, the telescopic part is the weakest link, and is easy to pull off and damage due to water flow impact.

As shown in fig. 1, the expansion joint is described in the following in the "05S 502 outdoor water supply pipeline auxiliary structure", wherein the expansion joint is located in the water supply direction, but in actual use, the expansion joint is arranged in front of the butterfly valve and is easily broken or dropped off due to the impact of water flow.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a butterfly valve expansion joint, which is characterized in that an expansion joint body is arranged at the rear of a butterfly valve, so that water flow is prevented from directly impacting the expansion joint body; meanwhile, the gland is pressed on the outer side of the sleeve disk to enable the sleeve disk to seal the connecting pipe, so that the sealing effect of the sleeve disk is improved.

The utility model adopts the following technical scheme:

a butterfly valve expansion joint comprises an expansion joint body arranged behind a butterfly valve along the water flow direction; the telescopic joint body comprises a sleeve disc, a connecting pipe and a gland, wherein the sleeve disc is sleeved on the outer side of the connecting pipe, the gland is pressed on the outer side of the sleeve disc to enable the sleeve disc to seal the connecting pipe, and the sleeve disc is fixedly connected with the gland through a stud and a nut.

Preferably, the sleeve comprises a diagonally extending pinch head, the pinch head end abutting against the rounded outer surface of the adapter.

Preferably, the compaction head comprises a first inner surface arranged obliquely, a first outer surface arranged obliquely and a first transition surface connected between the first inner surface and the first outer surface.

Preferably, the transition angle at the connection of the first transition surface and the first inner surface is an acute angle.

Preferably, the first transition surface is an arc surface, and the first transition surface and the first outer surface are in smooth transition.

Preferably, the gland includes a second inner surface that mates with the first outer surface, a second transition surface that mates with the first transition surface.

Preferably, a sealing ring is arranged between the sleeve disc and the connecting pipe.

Compared with the prior art, the utility model has the following advantages: the utility model provides a butterfly valve expansion joint, which is characterized in that an expansion joint body is arranged at the rear of a butterfly valve, so that water flow is prevented from directly impacting the expansion joint body, the impact force of the water flow passing through the butterfly valve is reduced, and the possibility of damage of the expansion joint body due to water flow impact is reduced; meanwhile, the gland is pressed on the outer side of the sleeve disk to enable the sleeve disk to seal the connecting pipe, so that the sealing effect of the sleeve disk is improved.

Drawings

Fig. 1 is a schematic view of the installation of a prior art expansion joint.

Fig. 2 is a cross-sectional view of the expansion joint.

Fig. 3 is a cross-sectional view of the sleeve disk.

Fig. 4 is a partial enlarged view of a portion a of fig. 3.

Fig. 5 is a cross-sectional view of the gland.

Fig. 6 is a partial enlarged view of the portion B of fig. 5.

Fig. 7 is a schematic view of the expansion joint installation of the present utility model.

In the figure, the expansion joint body 1, the sleeve disk 2, the tightening head 21, the first inner surface 211, the first outer surface 212, the first transition surface 213, the adapter 3, the gland 4, the second inner surface 41, the second transition surface 42 and the seal ring 5 are shown.

Detailed Description

In order to facilitate understanding of the technical scheme of the present utility model, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 2-7, a butterfly valve expansion joint comprises an expansion joint body 1 arranged behind a butterfly valve along the water flow direction;

specifically, the butterfly valve is arranged on a pipeline, the expansion joint body 1 is arranged at the rear of the butterfly valve, and water flow firstly passes through the butterfly valve and then enters the expansion joint body 1; according to the utility model, the expansion joint body 1 is arranged at the rear of the butterfly valve, so that water flow is prevented from directly impacting the expansion joint body 1, the impact force of the water flow passing through the butterfly valve is reduced, and the possibility of damage of the expansion joint body 1 due to water flow impact is reduced.

The telescopic joint body 1 comprises a sleeve disc 2, a connecting tube 3 and a gland 4, wherein the connecting tube 3 is connected to a pipeline, one end of the sleeve disc 2 is connected to a butterfly valve, the other end of the sleeve disc 2 is sleeved on the outer side of the connecting tube 3, the gland 4 is pressed on the outer side of the sleeve disc 2 to enable the sleeve disc 2 to seal the connecting tube 3, and the sleeve disc 2 is fixedly connected with the gland 4 through a stud and a nut.

As shown in fig. 2, the sleeve disc 2 comprises a diagonally extending compacting head 21, and the end part of the compacting head 21 is abutted against the round outer side surface of the adapter tube 3; the closer the tightening head 21 extends to the right, the smaller its diameter, as seen in the position shown, until it abuts against the circular outer surface of the nipple 3. The gland 4 is positioned on the outer surface of the compacting head 21 and can move left and right on the compacting head 21; specifically, if the water pressure in the pipeline is smaller or the liquid temperature is lower, the diameter of the connecting pipe 3 is slightly smaller than the original diameter, so that the connecting pipe 3 needs to be moved leftwards by a smaller length, and because the body of the connecting pipe 3 is of a cylindrical structure, the space between the connecting pipe 3 and the compressing head 21 can be increased, so that the gland 4 needs to be moved leftwards by a certain distance and compressed on the compressing head 21, and the compressing head 21 can still seal the connecting pipe 3 after a certain deformation. If the water pressure in the pipeline is large or the liquid temperature is high, the diameter of the connecting pipe 3 is slightly larger than the original diameter, so that the connecting pipe 3 needs to be moved rightwards by a small length, the space between the connecting pipe 3 and the compacting head 21 is reduced, the gland 4 needs to be moved rightwards by a certain distance, the compacting head 21 is prevented from being broken due to overlarge pressure between the gland 4 and the compacting head 21, and the compacting head 21 can still seal the connecting pipe 3. The position of the gland 4 only needs to be determined according to the sealing effect of the pressure head 21 and the adapter tube 3, for example, when the gland 4 moves leftwards, the movement of the gland 4 can be stopped as long as no water leakage exists between the pressure head 21 and the adapter tube 3 for a certain time.

One end of the stud is connected to the threaded hole of the sleeve disc 2, the other end of the stud passes through the connecting hole of the gland 4, the nut is in threaded fit with the stud, when the gland 4 needs to be moved leftwards, the nut only needs to be moved leftwards, the nut abuts against the right surface of the connecting hole of the gland 4 and pushes the gland 4 leftwards, so that the gland 4 moves leftwards on the gland 21 and is tightly pressed on the gland 21, and the gland 21 still can seal the connecting pipe 3 after a certain deformation occurs.

The connecting hole of the gland 4 may be slightly larger than the diameter of the stud in order to facilitate the movement of the gland 4.

In this embodiment, the compacting head 21 includes a first inner surface 211 disposed obliquely, a first outer surface 212 disposed obliquely, and a first transition surface 213 connected between the first inner surface 211 and the first outer surface 212.

The transition angle at the junction of the first transition surface 213 and the first inner surface 211 is acute, so that the length of the first inner surface 211 can be increased as much as possible when the length of the pressure head 21 is the same, because once the transition angle is obtuse, the vertex position of the first outer surface 212 is behind the vertex position of the first inner surface 211, and the length of the first inner surface 211 is shortened when the length of the pressure head 21 is the same, so that the possible movement range of the adapter 3 is increased.

The first transition surface 213 is an arc surface, and the first transition surface 213 and the first outer surface 212 are in smooth transition, so that the gland 4 can move on the first outer surface 212 conveniently.

The gland 4 includes a second inner surface 41 that mates with the first outer surface 212, and a second transition surface 42 that mates with the first transition surface 213. The second transition surface 42 is an arc surface that mates with the first transition surface 213.

When it is necessary to move the gland 4 to the left, it is only necessary to move the nut to the left, the nut abuts against the right surface of the connection hole of the gland 4 and pushes the gland 4 to the left, and the second inner surface 41 of the gland 4 moves along the first outer surface 212. The second transition surface 42 of the gland 4 abuts the first transition surface 213 after moving to the left to the extreme position.

A sealing ring 5 is arranged between the sleeve disc 2 and the connecting pipe 3, so that the sealing effect between the sleeve disc 2 and the connecting pipe 3 is improved.

The foregoing is merely a preferred embodiment of the present utility model, and the scope of the utility model is defined by the claims, and those skilled in the art should also consider the scope of the present utility model without departing from the spirit and scope of the utility model.

Claims

1. The butterfly valve expansion joint is characterized by comprising an expansion joint body (1) arranged at the rear of the butterfly valve along the water flow direction; the telescopic joint is characterized in that the telescopic joint body (1) comprises a sleeve disc (2), a connecting pipe (3) and a gland (4), the sleeve disc (2) is sleeved on the outer side of the connecting pipe (3), the gland (4) is pressed on the outer side of the sleeve disc (2) to enable the sleeve disc (2) to seal the connecting pipe (3), and the sleeve disc (2) is fixedly connected with the gland (4) through a stud and a nut.

2. A butterfly valve expansion joint according to claim 1, characterized in that the bushing (2) comprises a diagonally extending tightening head (21), the end of the tightening head (21) abutting against the circular outer surface of the adapter tube (3).

3. A butterfly valve expansion joint according to claim 2, characterized in that the compression head (21) comprises a first inner surface (211) arranged obliquely, a first outer surface (212) arranged obliquely and a first transition surface (213) connected between the first inner surface (211) and the first outer surface (212).

4. A butterfly valve expansion joint according to claim 3, characterized in that the transition angle at which the first transition surface (213) joins the first inner surface (211) is acute.

5. A butterfly valve expansion joint according to claim 3, characterized in that the first transition surface (213) is an arc surface, the first transition surface (213) being in smooth transition with the first outer surface (212).

6. A butterfly valve expansion joint according to claim 3, characterized in that the gland (4) comprises a second inner surface (41) cooperating with the first outer surface (212), a second transition surface (42) cooperating with the first transition surface (213).

7. A butterfly valve expansion joint according to claim 3, characterized in that a sealing ring (5) is arranged between the sleeve (2) and the adapter tube (3).