Water hammer eliminating device

Abstract

The utility model provides a water hammer eliminating device, and belongs to the technical field of pipeline conveying equipment. The problems that on one hand, an existing water hammer eliminating device is high in manufacturing cost, engineering economic benefits are reduced, and on the other hand, the water hammer eliminating capacity of some devices is limited are solved. The pressure relief device comprises a pipe body, a first pressure relief device and a second pressure relief device, a water inlet and a water outlet are formed in the two ends of the pipe body respectively, a barrel is arranged on the pipe body, the first pressure relief device is arranged in the barrel, branch pipes are arranged on the two sides of the barrel, one end of each branch pipe is communicated with the barrel, the other end of each branch pipe is communicated with the pipe body, and the other end of each branch pipe is communicated with the pipe body. A second pressure relief device is arranged in the branch pipe, the first pressure relief device comprises a spring, a pressure relief cavity and a baffle plate, the pressure relief cavity is arranged in the cylinder body, the bottom of the pressure relief cavity is communicated with the pipe body, the spring is arranged in the pressure relief cavity, and the second pressure relief device comprises a rectifying grid and a pressure relief cylinder. The device is mainly used for eliminating the water hammer of the pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline conveying equipment, and particularly relates to a water hammer elimination device. Background Technique

[0002] In daily life and industrial production, water supply pipelines play an important role and also account for a relatively large proportion of the investment. During the rapid closing of the valves in the water supply pipeline, due to the rapid change in the velocity of the transported fluid, a large shock wave is formed, causing damage to the valves and pipelines. Especially for long-distance, high-lift, and high-flow water conveyance pipelines, the water hammer generated by the sudden closing of the valves can cause the pipeline to burst and even result in personal injuries. On the one hand, the existing water hammer elimination devices are relatively expensive, reducing the economic benefits of the project. On the other hand, some devices have limited water hammer elimination capabilities and are not sufficient for use in projects. Content of the Utility Model

[0003] In view of this, the utility model aims to propose a water hammer elimination device to solve the problems that on the one hand, the existing water hammer elimination devices are relatively expensive, reducing the economic benefits of the project, and on the other hand, some devices have limited water hammer elimination capabilities.

[0004] To achieve the above object, the utility model adopts the following technical solutions: A water hammer elimination device, which includes a pipe body, a first pressure relief device, and a second pressure relief device. The two ends of the pipe body are respectively provided with a water inlet and a water outlet. A cylinder body is arranged on the pipe body. The first pressure relief device is arranged inside the cylinder body. Branch pipes are arranged on both sides of the cylinder body. One end of the branch pipe is communicated with the cylinder body, and the other end of the branch pipe is communicated with the pipe body. The second pressure relief device is arranged inside the branch pipe. The first pressure relief device includes a spring, a pressure relief chamber, and a baffle. The pressure relief chamber is arranged inside the cylinder body. The bottom of the pressure relief chamber is communicated with the pipe body. The spring is arranged inside the pressure relief chamber. One end of the spring is connected to the top of the pressure relief chamber, and the other end of the spring is connected to the baffle. The edge of the baffle is fitted with the inner wall of the pressure relief chamber. The second pressure relief device includes a flow rectifying grid and a pressure relief cylinder. Both the flow rectifying grid and the pressure relief cylinder are arranged inside the branch pipe. The flow rectifying grid is arranged at one end of the pressure relief cylinder close to the cylinder body.

[0005] Furthermore, the branch pipe is a bent pipe, which includes an inclined pipe section and a vertical pipe section. The bottom end of the vertical pipe section is connected to the pipe body, and the top end of the vertical pipe section is connected to the cylinder body through the inclined pipe section.

[0006] Furthermore, both the flow rectifying grid and the pressure relief cylinder are arranged inside the inclined pipe section of the branch pipe.

[0007] Furthermore, a first valve is arranged at the connection between the branch pipe and the pipe body.

[0008] Furthermore, the first valve is a one-way valve.

[0009] Further, a second valve is provided at the connection between the branch pipe and the cylinder body.

[0010] Further, a plurality of S-shaped grid plates are arranged side by side and equidistantly spaced in the pressure relief cylinder.

[0011] Further, a plurality of partition plates are arranged side by side and equidistantly spaced in the rectifying grid, and the plurality of partition plates are arranged in one-to-one correspondence with the plurality of S-shaped grid plates.

[0012] Further, a circular leakage hole is provided on one side of the partition plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model provides a water hammer elimination device, which is provided with a first pressure relief device and a second pressure relief device. The fluid impacts the baffle in the first pressure relief device, and the kinetic energy is converted into elastic potential energy through the spring to eliminate part of the water hammer pressure. Then the water flows into the branch pipe, and under the combined action of the rectifying grid and the pressure relief cylinder in the second pressure relief device, the remaining pressure is continuously eliminated;

[0015] 2. The water hammer elimination device of the present utility model provides a buffer pressure area for the high-pressure fluid through the deformation of the spring and the S-shaped grid plate flow channel, eliminates the high pressure in sequence, not only brings protection to the device itself, but also finally the fluid after pressure elimination can flow back through the one-way valve without causing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a water hammer elimination device according to the present utility model;

[0018] Figure 2 is an enlarged view of the pressure relief cylinder in a water hammer elimination device according to the present utility model;

[0019] Figure 3 is an enlarged view of the rectifying grid structure in a water hammer elimination device according to the present utility model.

[0020] 1 - pipe body, 2 - water inlet, 3 - water outlet, 4 - first valve, 5 - pressure relief cylinder, 6 - rectifying grid, 7 - second valve, 8 - cylinder body, 9 - spring, 10 - pressure relief chamber, 11 - baffle, 12 - branch pipe, 13 - S-shaped grid plate, 14 - circular leakage hole, 15 - partition plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely elaborate on the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Refer to Figures 1-3 In this embodiment, a water hammer elimination device is described. It includes a pipe body 1, a first pressure relief device, and a second pressure relief device. Water inlets 2 and outlets 3 are respectively arranged at both ends of the pipe body 1. A cylinder body 8 is arranged on the pipe body 1. The first pressure relief device is arranged inside the cylinder body 8. Branch pipes 12 are arranged on both sides of the cylinder body 8. One end of each branch pipe 12 is communicated with the cylinder body 8, and the other end of each branch pipe 12 is communicated with the pipe body 1. The second pressure relief device is arranged inside the branch pipes 12. The first pressure relief device includes a spring 9, a pressure relief chamber 10, and a baffle 11. The pressure relief chamber 10 is arranged inside the cylinder body 8. The bottom of the pressure relief chamber 10 is communicated with the pipe body 1. The spring 9 is arranged inside the pressure relief chamber 10. One end of the spring 9 is connected to the top of the pressure relief chamber 10, and the other end of the spring 9 is connected to the baffle 11. The edge of the baffle 11 is fitted with the inner wall of the pressure relief chamber 10. The second pressure relief device includes a flow rectifying grid 6 and a pressure relief cylinder 5. The flow rectifying grid 6 and the pressure relief cylinder 5 are both arranged inside the branch pipes 12. The flow rectifying grid 6 is arranged at one end of the pressure relief cylinder 5 close to the cylinder body 8. The cylinder body 8 is cylindrical. The pressure relief chamber 10 is coaxial with the cylinder body 8. The baffle 11 can freely move up and down along the wall surface of the pressure relief chamber 10. The baffle 11 has good sealing with the pressure relief chamber 10 and there will be no fluid leakage. The spring 9 only deforms along the axial direction of the cylinder body 8. The cylinder body 8 is fixedly connected to the pipe body 1.

[0023] In this embodiment, the first pressure relief device and the second pressure relief device are provided. The fluid impacts the baffle 11 in the first pressure relief device, and the kinetic energy is converted into elastic potential energy through the spring 9 to eliminate a part of the water hammer pressure. Then the water flows into the branch pipes 12, and under the combined action of the flow rectifying grid 6 and the pressure relief cylinder 5 in the second pressure relief device, the remaining pressure is continuously eliminated.

[0024] In this embodiment, the branch pipes 12 are bent pipes. The branch pipes 12 include an inclined pipe section and a vertical pipe section. The bottom end of the vertical pipe section is connected to the pipe body 1, and the top end of the vertical pipe section is connected to the cylinder body 8 through the inclined pipe section.

[0025] In this embodiment, the flow rectifying grid 6 and the pressure relief cylinder 5 are both arranged inside the inclined pipe section of the branch pipes 12. After the fluid is pressure relieved by the flow rectifying grid 6 and the pressure relief cylinder 5, it flows back into the pipe body 1 under the action of gravity.

[0026] In this embodiment, a first valve 4 is provided at the connection between the branch pipe 12 and the pipe body 1, and the first valve 4 is a check valve.

[0027] In this embodiment, a second valve 7 is provided at the connection between the branch pipe 12 and the cylinder body 8.

[0028] In this embodiment, a plurality of S-shaped grid plates 13 are arranged side by side at equal intervals in the pressure relief cylinder 5. The S-shaped grid plates 13 are thin plates, and fluid can pass between the S-shaped grid plates 13 to fully relieve the pressure of the fluid.

[0029] In this embodiment, a plurality of partition plates 15 are arranged side by side at equal intervals in the flow rectifying grid 6. The plurality of partition plates 15 are arranged in one-to-one correspondence with the plurality of S-shaped grid plates 13. The cross sections of the pressure relief cylinder 5 and the flow rectifying grid 6 are both circular. The S-shaped grid plates 13 are in close contact with the partition plates 15. A circular leakage hole 14 is provided on one side of the partition plate 15. Fluid can be aggregated by gravity through the circular leakage hole 14, and after eliminating the velocity circulation, it flows into the pressure relief cylinder 5.

[0030] In this embodiment, through the deformation of the spring 9 and the flow channels of the S-shaped grid plates 13, a buffer pressure area is provided for the high-pressure fluid, and the high pressure is eliminated in turn, which not only protects the device itself, but also finally allows the fluid after pressure elimination to flow back through the check valve without causing waste.

[0031] In this embodiment, the water hammer elimination device is installed at the front end of the downstream valve. With the above structure, when the flow rate in the pipe body 1 suddenly changes in a short time, the pressure in the pipe body 1 surges, and the fluid flows back towards the water inlet 1 due to the closing of the water outlet 3. After passing through the first pressure relief device, the high-pressure fluid acts on the baffle 11, and the baffle 11 moves upward and compresses the spring 9. The spring 9 converts the kinetic energy into elastic potential energy, thereby eliminating a part of the water hammer. If the water hammer pressure is too high for the first pressure relief device to completely eliminate the high pressure of the fluid, the baffle 11 is pushed above the second valve 7, and the second valve 7 opens. The fluid flows into the branch pipe 12 and first enters the flow rectifying grid 6 to eliminate the velocity circulation, then flows into the pressure relief cylinder 5, is fully relieved by the flow channels between the S-shaped grid plates 13, then enters below the branch pipe 12 under the action of gravity, the first valve 4 opens, and the fluid flows back into the pipe body 1 to realize the recycling of water resources.

[0032] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. A water hammer elimination device, characterized in that: It comprises a pipe body (1), a first pressure relief device and a second pressure relief device. The two ends of the pipe body (1) are respectively provided with a water inlet (2) and a water outlet (3). The pipe body (1) is provided with a cylinder (8). The first pressure relief device is provided in the cylinder (8). Branch pipes (12) are provided on both sides of the cylinder (8). One end of the branch pipe (12) is connected to the cylinder (8). The other end of the branch pipe (12) is connected to the pipe body (1). The second pressure relief device is provided in the branch pipe (12). The first pressure relief device comprises a spring (9), a pressure relief chamber (10) and a baffle (11). The pressure relief chamber (10) is provided with a spring (9). The pressure relief chamber (10) is arranged inside the cylinder (8), the bottom of the pressure relief chamber (10) is connected to the tube body (1), the spring (9) is arranged in the pressure relief chamber (10), one end of the spring (9) is connected to the top of the pressure relief chamber (10), and the other end of the spring (9) is connected to the baffle (11), and the edge of the baffle (11) is arranged in contact with the inner wall of the pressure relief chamber (10), and the second pressure relief device includes a rectifying grid (6) and a pressure relief cylinder (5), the rectifying grid (6) and the pressure relief cylinder (5) are both arranged in the branch pipe (12), and the rectifying grid (6) is arranged at one end of the pressure relief cylinder (5) close to the cylinder (8).

2. A water hammer elimination device according to claim 1, characterized in that: The branch pipe (12) is a curved pipe, and comprises an inclined pipe section and a vertical pipe section, wherein the bottom end of the vertical pipe section is connected to the pipe body (1), and the top end of the vertical pipe section is connected to the cylinder body (8) via the inclined pipe section.

3. A water hammer elimination device according to claim 2, characterized in that: The rectifying grid (6) and the pressure relief cylinder (5) are both arranged in the inclined pipe section of the branch pipe (12).

4. A water hammer elimination device according to claim 1, characterized in that: A first valve (4) is provided at the connection between the branch pipe (12) and the pipe body (1).

5. A water hammer elimination device according to claim 4, characterized in that: The first valve (4) is a one-way valve.

6. A water hammer elimination device according to claim 1, characterized in that: A second valve (7) is provided at the connection between the branch pipe (12) and the cylinder (8).

7. A water hammer elimination device according to claim 1, characterized in that: A plurality of S-shaped grid plates (13) are arranged side by side and at equal intervals in the pressure relief cylinder (5).

8. A water hammer elimination device according to claim 1, characterized in that: A plurality of partitions (15) are arranged side by side and spaced evenly in the rectifying grid (6), and the plurality of partitions (15) are arranged in a one-to-one correspondence with the plurality of S-shaped grid plates (13).

9. A water hammer elimination device according to claim 8, characterized in that: A circular leak hole (14) is provided on one side of the partition (15).

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