Water hammer eliminator

Abstract

The utility model provides a water hammer eliminator, and belongs to the technical field of pipelines. The problem of how to restrain the water hammer phenomenon is solved. The water hammer eliminator comprises a pipe body and a cover body, the pipe body is provided with a branch pipe communicated with an inner cavity of the pipe body, the cover body is detachably connected to the branch pipe, and an abutting edge is arranged in the branch pipe in the circumferential direction. A cushion plate which abuts against the abutting edge is movably connected into the branch pipe, the circumferential side wall of the cushion plate is attached to the circumferential inner wall of the branch pipe, and an elastic piece which enables the cushion plate to abut against the abutting edge is arranged in the cover body. The water hammer eliminator can effectively restrain the water hammer phenomenon.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipelines and relates to a water hammer arrester. Background Art

[0002] In the prior art, the transportation of fluids is often achieved through the cooperation of pipelines with valves, pump bodies and other structures. However, during the transportation process, due to many external factors such as the layout length of the pipeline and the internal space, when the valve is suddenly opened or closed or the pump body is suddenly stopped, the flow rate of the fluid will suddenly change, and the pressure of the fluid will fluctuate greatly, thereby causing water hammer in the pipeline. Due to the existence of the water hammer phenomenon, the pipeline system will cause strong vibration and noise. In the long run, it will cause irreversible damage to the pipeline and valve joints.

[0003] Nowadays, in order to avoid water hammer phenomenon, the commonly used method is to delay the opening and closing time of valves and pump bodies, that is, to open or close slowly. However, the effect of this method is very limited and can only have a suppressive effect, but cannot completely prevent the occurrence of water hammer phenomenon. Summary of the invention

[0004] The purpose of the utility model is to propose a water hammer eliminator in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to suppress the occurrence of water hammer phenomenon.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a water hammer arrester, comprising a tube body and a cover body, characterized in that the tube body is provided with a branch pipe connected to the cavity in the tube body, the cover body is detachably connected to the branch pipe, an abutment edge is circumferentially provided along the inner edge of the branch pipe, and a pad is movably connected in the branch pipe, which abuts against the abutment edge and whose circumferential side wall is in contact with the circumferential inner wall of the branch pipe, and an elastic member is provided in the cover body to press the pad against the abutment edge.

[0006] Compared with the prior art, the advantage of the present water hammer eliminator is that the function of the pipe body in the present case is to be used for docking the pipeline, so that the water hammer eliminator can be integrated into the pipeline as a part of the structure of the pipeline in the later stage, and secondly, the cover body, elastic member, gasket and other structures are installed through the branch pipe formed on the pipe body. Specifically, the gasket is pushed downward by the elastic force of the elastic member, and the gasket is pressed against the abutment edge when the circumferential side wall and the circumferential inner wall of the branch pipe are in contact, and in this state, the elastic member is still in a compressed state, so that the gasket can be pressed against the abutment edge to maintain its position. When the fluid pressure is too high during the subsequent fluid transportation through the pipeline, part of the pressure in the fluid will act on the gasket to push it upward, so that the elastic member is further compressed. In this state, the elastic reaction force of the elastic member can unload the pressure acting on the gasket, thereby achieving the effect of offsetting the water hammer phenomenon. Furthermore, the cover body is specifically installed in a detachable connection manner, so as to ensure that the cover body can be removed and cleaned through the branch pipe when foreign matter appears in the pipe body. In addition, it can also ensure that the gasket, elastic member and other components are easy to replace when they are damaged.

[0007] In the above-mentioned water hammer arrester, the circumferential outer wall of the branch pipe is provided with an external thread, the circumferential inner wall of the cover body is provided with an internal thread, and the cover body and the branch pipe are screwed and locked by the internal and external threads. The cover body and the branch pipe specifically adopt the method of internal and external threads to achieve stable connection of the cover body and easy disassembly. In addition, as an alternative, the cover body can also be directly connected to the branch pipe by a clamping method.

[0008] In the above water hammer arrester, a guide sleeve is vertically arranged on the bottom wall of the cover body, and the elastic member is inserted into the guide sleeve and abuts against the circumferential inner wall of the guide sleeve. Through this arrangement, the spring is limited and guided to ensure that its extension direction will not deviate.

[0009] In the above-mentioned water hammer arrester, a limiting rod having a limiting portion at one end is provided in the branch pipe, the pad is sleeved outside the limiting rod and limited by the limiting portion, one end of the elastic member is tightly pressed against the bottom wall of the cover body, and the other end is sleeved outside the limiting rod and tightly pressed against the pad surface. The setting of the limiting rod ensures that the elastic member acting on the pad will not be offset due to the up and down movement of the pad.

[0010] In the above-mentioned water hammer arrester, a sealing ring is provided at the port of the branch pipe, and the sealing ring is tightly pressed against the circumferential edge of the bottom wall of the cover body, thereby ensuring the sealing between the cover body and the branch pipe.

[0011] In the above-mentioned water hammer arrester, the branch pipe has a joint connected to the cavity in the branch pipe, and the shortest distance from the inner end of the joint to the abutment edge is greater than the thickness of the pad. When the fluid pressure in the pipeline is too high, the pad that slides upward moves to the top of the joint, so that the inner end of the joint is connected to the cavity in the pipe body through the branch pipe, that is, in addition to the buffering effect of the elastic member on the pad, part of the fluid pressure can be leaked outward through the joint, thereby ensuring the compensation of the water hammer phenomenon.

[0012] In the above water hammer arrester, the pad is made of rubber material, which ensures that the manufacturing cost of the pad is lower, and as an alternative, the pad can also be made of silicone material.

[0013] Compared with the existing technology, this water hammer arrester has the following advantages:

[0014] 1. The pad is pressed against the abutment edge in the branch pipe by the elastic member, so that part of the pressure of the fluid acts on the pad to further compress the elastic member. In this state, the elastic reaction force of the elastic member can unload the pressure of this part of the fluid, thereby achieving the effect of counteracting the water hammer phenomenon.

[0015] 2. The cover body is detachably connected to the branch pipe by threaded fitting, which is convenient for cleaning foreign matter in the pipe body and replacing elastic parts, pads and other components.

[0016] 3. Through the setting of the joint, when the pressure in the pipe body is released, the elastic part and the pad can cooperate to release the pressure, and part of the pressure can be released to the branch pipe through the joint, so as to avoid the occurrence of water hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the water hammer eliminator.

[0018] Figure 2 This is an exploded view of the water hammer arrester.

[0019] Figure 3 This is a cross-sectional view of the water hammer arrester.

[0020] Figure 4 It is a cross-sectional view of the tube body.

[0021] In the figure, 1, tube body; 11, branch pipe; 111, abutment edge; 112, sealing ring; 113, joint; 12, pad; 13, limit rod; 131, limit part; 2, cover body; 21, elastic member; 22, guide sleeve. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1-3 As shown, the water hammer arrester comprises a tube body 1 and a cover body 2. The tube body 1 is specifically in the shape of a long strip and has a branch pipe 11 integrally formed on one side of the outer wall. An internal thread is tapped on the circumferential inner wall of the cover body 2, and an external thread is tapped on the circumferential outer wall of the branch pipe 11. The two are fixed by the cooperation of the internal thread and the external thread. A long strip-shaped guide sleeve 22 is integrally formed on the inner bottom wall of the cover body 2, and an elastic member 21 is inserted in the guide sleeve 22 and pressed against the inner bottom wall of the cover body 2. The elastic member 21 is specifically an elastic member. Spring, and the elastic member 21 is fitted with the circumferential inner wall of the guide sleeve 22, a disc-shaped pad 12 made of rubber material is provided in the branch pipe 11, and a limiting rod 13 with a limiting portion 131 formed at one end is also provided in the branch pipe 11, and the limiting portion 131 is specifically in the shape of a circular plate, the pad 12 is connected to the limiting rod 13 by a sleeve connection and is positioned by the limiting portion 131, and the other end of the limiting rod 13 is penetrated into the elastic member 21 so that the elastic member 21 is pressed against the plate surface of the pad 12.

[0024] Combination Figure 4 A resting edge 111 is circumferentially provided in the branch pipe 11, and the circumferential edge of the bottom surface of the pad 12 is in contact with the resting edge 111. Under the elastic action of the elastic member 21, the circumferential edge of the bottom surface of the pad 12 is pressed against the resting edge 111. When the two ends of the pipe body 1 are docked on the pipeline and the valve and the pump body are cooperated to perform fluid transportation, if the pressure of the fluid increases suddenly, the overloaded part of the fluid pressure can be diverted in the pipeline, that is, the overloaded part of the fluid pressure enters the branch pipe 11 and pushes the pad 12 upward. In this process, the pad 12 is separated from the resting edge 111 and continuously squeezes the elastic member 21, so that the elastic member 21 is compressed and forms a reaction force of the elastic member 21 downward. The elastic reaction force and the fluid pressure are offset by each other, thereby eliminating the water hammer phenomenon.

[0025] In addition, if Figure 4 As shown, a joint 113 connected to the cavity in the branch pipe 11 is integrally formed on one side of the branch pipe 11. The setting height of the joint 113 is greater than the thickness of the pad 12. Under normal circumstances, the existence of the pad 12 can block the joint 113 from the cavity in the pipe body 1 to prevent the pressure of the fluid in the pipe body 1 from being lost through the joint 113. When the fluid pressure in the pipe body 1 suddenly increases, the pressure of the fluid acts on the pad 12 to make the pad 12 slide upward and move the pad 12 to the top of the joint 113. At this time, the joint 113 is connected to the pipe body 1 through the branch pipe 11. While the pressure in the pipe body 1 is offset by the elastic member 21, the pressure of the fluid can also be leaked outward through the joint 113, thereby achieving the elimination of water hammer phenomenon.

[0026] In addition, if Figure 2 and Figure 3As shown, a sealing ring 112 is provided at the port of the branch pipe 11. When the cover body 2 is screwed on the branch pipe 11, the sealing ring 112 can be tightly pressed against the circumferential edge of the inner bottom wall of the tube body 1, thereby preventing the fluid from leaking outward from the gap between the branch pipe 11 and the cover body 2 during the transportation process.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0028] Although the terms such as pipe body 1, branch pipe 11, abutting edge 111, sealing ring 112, joint 113, pad 12, limiting rod 13, limiting portion 131, cover body 2, elastic member 21, guide sleeve 22 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A water hammer arrester, comprising a tube body (1) and a cover body (2), characterized in that: The tube body (1) is provided with a branch tube (11) communicating with the inner cavity of the tube body (1); the cover body (2) is detachably connected to the branch tube (11); a circumferentially inner side of the branch tube (11) is provided with a supporting edge (111); a pad (12) is movably connected in the branch tube (11) and is in contact with the supporting edge (111), and the circumferential side wall of the pad is in contact with the circumferential inner wall of the branch tube (11); and an elastic member (21) is provided in the cover body (2) for pressing the pad (12) against the supporting edge (111).

2. The water hammer arrester according to claim 1, characterized in that: The branch pipe (11) is provided with an external thread on its circumferential outer wall, and the cover body (2) is provided with an internal thread on its circumferential inner wall. The cover body (2) and the branch pipe (11) are screwed and locked together by means of the matching internal and external threads.

3. The water hammer arrester according to claim 1 or 2, characterized in that: A guide sleeve (22) is vertically arranged on the inner bottom wall of the cover body (2), and the elastic member (21) is inserted into the guide sleeve (22) and abuts against the circumferential inner wall of the guide sleeve (22).

4. The water hammer arrester according to claim 2, characterized in that: A limiting rod (13) having a limiting portion (131) at one end is provided in the branch pipe (11); the pad (12) is sleeved outside the limiting rod (13) and is limited by the limiting portion (131); one end of the elastic member (21) is tightly pressed against the inner bottom wall of the cover body (2); and the other end is sleeved outside the limiting rod (13) and is tightly pressed against the plate surface of the pad (12).

5. The water hammer arrester according to claim 2 or 4, characterized in that: A sealing ring (112) is provided at the end of the branch pipe (11), and the sealing ring (112) is tightly pressed against the circumferential edge of the inner bottom wall of the cover body (2).

6. The water hammer arrester according to claim 5, characterized in that: The branch pipe (11) is provided with a joint (113) communicating with the inner cavity of the branch pipe (11), and the shortest distance from the inner end of the joint (113) to the abutment edge (111) is greater than the thickness of the pad (12).

7. The water hammer arrester according to claim 5, characterized in that: The pad (12) is made of rubber material.

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