A sliding type water hammer prevention structure for an intake and exhaust valve

Abstract

This utility model relates to a sliding waterproof hammer structure for an air intake and exhaust valve, belonging to the technical field of composite air intake and exhaust valves. It includes an outer cylinder and an inner cylinder slidably disposed within the outer cylinder. The outer cylinder wall has multiple sets of first through holes, which are equidistantly distributed vertically on the outer cylinder. Multiple first through holes in each set are arranged in a ring array on the outer cylinder wall. The inner cylinder has multiple sets of second through holes. When the inner cylinder is at the top of the outer cylinder, the first and second through holes are connected. When the inner cylinder is at the bottom of the outer cylinder, the first and second through holes located below the top cover are closed. This utility model provides a sliding waterproof hammer structure for an air intake and exhaust valve. It has a simple structure and can change the connection state of the first and second through holes according to the pressure in the water pipeline, thus changing the air communication state between the inside of the air intake and exhaust valve and the external environment.

Description

Technical Field

[0001] This utility model relates to the field of composite intake and exhaust valve technology, and in particular to a sliding waterproof hammer structure for intake and exhaust valves. Background Technology

[0002] In water conveyance pipeline systems, water hammer is one of the main causes of pipeline system failure. The occurrence of water hammer is closely related to the pressure fluctuations of water flow within the pipeline. These fluctuations can be triggered by various factors such as valve operation and pump station start-up and shutdown, leading to rapid changes in pressure within the pipeline and forming destructive water hammer waves.

[0003] Traditional composite air intake and exhaust valves play an important role in exhaust and pressure stabilization in pipeline systems. However, when faced with transient pressure fluctuations, high-speed airflow can easily cause the float inside the composite air intake and exhaust valve to oscillate and become unstable. Pressure shocks can cause structural damage to pipelines, valves and other equipment.

[0004] Therefore, the inventors improved upon the existing composite intake and exhaust valves and designed a sliding waterproof hammer structure, which achieves a smooth transition of pressure fluctuations by matching the intake and exhaust cross-sectional area with the fluid kinetic energy. Utility Model Content

[0005] The purpose of this invention is to provide a sliding water hammer prevention structure for intake and exhaust valves, which aims to match the intake and exhaust cross-sectional area with the fluid kinetic energy according to the working conditions to achieve a smooth transition of pressure fluctuations, thereby effectively suppressing the generation of water hammer.

[0006] This utility model provides a sliding waterproof hammer structure for an intake and exhaust valve, which adopts the following technical solution:

[0007] A sliding waterproof hammer structure for an intake and exhaust valve includes,

[0008] The outer cylinder has multiple sets of first through holes on its wall. The multiple sets of first through holes are equidistantly distributed on the outer cylinder along the vertical direction. Each set of first through holes includes multiple first through holes, and the multiple first through holes in each set are arranged in a ring array on the outer cylinder wall.

[0009] The inner cylinder is slidably disposed inside the outer cylinder in a vertical direction. The inner cylinder includes an inner body and a top cover disposed at the top of the inner body. The inner body has multiple sets of second through holes. The multiple sets of second through holes are equidistantly disposed on the inner body in a vertical direction. Each set of second through holes includes multiple second through holes. The multiple second through holes in each set are arranged in a ring array on the inner body. The top cover has ventilation holes.

[0010] When the inner cylinder is located at the top of the outer cylinder, the first through hole and the second through hole are connected; when the inner cylinder is located at the bottom of the outer cylinder, the first through hole and the second through hole located below the top cover are closed.

[0011] Preferably, the spacing between two adjacent sets of second through holes is consistent with the vertical dimension of the first through hole;

[0012] The spacing between two adjacent sets of the first through holes is consistent with the vertical dimension of the second through hole.

[0013] Preferably, the top end of the outer cylinder is provided with a limiting edge.

[0014] Preferably, the first through hole and the second through hole are strip-shaped holes extending in a horizontal direction.

[0015] Preferably, a fixing ring plate is provided at the bottom end of the outer cylinder, and the fixing ring plate has fixing holes.

[0016] Preferably, the limiting edge and the outer cylinder are integrally formed.

[0017] Preferably, the inner cylinder and the top cover are integrally formed.

[0018] In summary, this utility model has the following beneficial technical effects:

[0019] 1. The sliding waterproof hammer structure in this application is used for the inlet and outlet of the air inlet and outlet valve. An inner cylinder is slidably installed inside the outer cylinder in the vertical direction. The outer cylinder and the inner cylinder are respectively provided with a first through hole and a second through hole. When the pipeline pressure increases, the inner cylinder slides vertically upward to the top of the outer cylinder under the impact of the pressure inside the pipeline. At this time, the first through hole and the second through hole are connected, thereby increasing the ventilation area between the air inlet and outlet valve and the external environment. When the pipeline pressure decreases, the inner cylinder slides to the bottom of the outer cylinder. At this time, the first through hole located below the top cover of the inner cylinder is blocked by the inner cylinder body, and the second through hole is blocked by both the inner and outer cylinders. The exchange of air between the air inlet and outlet valve and the outside air is only carried out through the vent hole provided on the top cover, thereby maintaining the stable operation of the pipeline.

[0020] 2. The outer cylinder in this application has a limiting edge at the top to limit the inner cylinder. At the same time, the limiting edge and the outer cylinder are integrally formed, which not only facilitates processing, but also enhances the connection strength between the limiting edge and the outer cylinder, thereby enhancing the resistance to impact from the inner cylinder. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a sliding waterproof hammer structure for an intake and exhaust valve provided by this utility model;

[0022] Figure 2 This is a structural diagram of a sliding waterproof hammer structure in one of its working states;

[0023] Figure 3 This is a schematic diagram of another working state of the sliding waterproof hammer structure.

[0024] Explanation of reference numerals in the attached drawings: 1. Outer cylinder; 11. First through hole; 12. Limiting edge; 13. Fixing ring plate; 131. Fixing hole; 2. Inner cylinder; 21. Top cover; 211. Vent hole; 22. Inner cylinder body; 221. Second through hole; 3. Inlet and outlet valve. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0026] This utility model provides a sliding waterproof hammer structure for an intake and exhaust valve. (Refer to...) Figure 1 and Figure 2 A sliding waterproof hammer structure for an air intake and exhaust valve includes an outer cylinder 1 and an inner cylinder 2. The inner cylinder 2 is slidably disposed inside the outer cylinder 1 in a vertical direction. The bottom end of the outer cylinder 1 is fixedly connected to the air intake and exhaust port of the air intake and exhaust valve 3. The outer cylinder 1 has multiple sets of first through holes 11 on its cylinder wall, and the multiple sets of first through holes 11 are equidistantly distributed on the outer cylinder 1 in a vertical direction. The inner cylinder 2 has multiple sets of second through holes 221 on its cylinder wall, and the multiple sets of second through holes 221 are equidistantly distributed on the inner cylinder 2 in a vertical direction.

[0027] When the inner cylinder 2 is slid to the top of the outer cylinder 1, the first through hole 11 and the second through hole 221 are connected; when the inner cylinder 2 is slid to the bottom of the outer cylinder 1, the first through hole 11 and the second through hole 221 located below the top cover 21 are closed.

[0028] Reference Figure 1 and Figure 3 The inner cylinder 2 includes an inner cylinder body 22 and a top cover 21. The top cover 21 is located at the top of the inner cylinder body 22, and a vent hole 211 is provided at the top of the top cover 21. That is, when the inner cylinder 2 is located at the bottom of the outer cylinder 1, the air inlet and outlet valve 3 is connected to the external environment only through the vent hole 211.

[0029] Reference Figure 2 and Figure 3Each group of first through holes 11 includes multiple first through holes 11, and the multiple first through holes 11 in each group are arranged in a ring array on the outer cylinder 1 wall; each group of second through holes 221 includes multiple second through holes 221, and the multiple first through holes 11 in each group are arranged in a ring array on the inner cylinder 22. In this embodiment, the first through holes 11 are preferably provided in two groups, and each group of first through holes 11 includes four first through holes 11; in this embodiment, the second through holes 221 are preferably provided in two groups, and each group of second through holes 221 includes four second through holes 221. The spacing between two adjacent sets of second through holes 221 is consistent with the vertical dimension of the first through hole 11, and the spacing between two adjacent sets of first through holes 11 is consistent with the vertical dimension of the second through hole 221. Thus, when the inner cylinder 2 is located at the top of the outer cylinder 1, the first through hole 11 and the second through hole 221 are in a connected state, and when the inner cylinder 2 is located at the bottom of the outer cylinder 1, the first through hole 11 and the second through hole 221 located below the top cover 21 are in a closed state.

[0030] Reference Figure 1 and Figure 2 The first through hole 11 and the second through hole 221 are both horizontally extending strip-shaped holes, thus ensuring that the first through hole 11 and the second through hole 221 are always connected when the inner cylinder 2 is located at the top of the outer cylinder 1.

[0031] Reference Figure 1 and Figure 2 A fixing ring plate 13 is fixedly connected to the bottom end of the outer cylinder 1. The fixing ring plate 13 has fixing holes 131 for bolting the inlet and outlet valves 3. A limiting edge 12 is provided at the top end of the outer cylinder 1. The limiting edge 12 limits the inner cylinder 2 and prevents the inner cylinder 2 from sliding out of the top end of the outer cylinder 1. The limiting edge 12 and the outer cylinder 1 are integrally formed, which not only facilitates processing but also enhances the connection strength between the limiting edge 12 and the outer cylinder 1, thereby enhancing the resistance to the impact force of the inner cylinder 2. At the same time, in this embodiment, the inner cylinder body 22 and the top cover 21 are integrally formed, which facilitates the overall processing of the inner cylinder 2.

[0032] The implementation principle of this utility model for a sliding waterproof hammer structure for an air intake and exhaust valve is as follows:

[0033] When the pipeline pressure increases, the inner cylinder 2 slides vertically upwards to the top of the outer cylinder 1 under the impact of the pressure inside the pipeline. At this time, the first through hole 11 and the second through hole 221 are connected, thereby increasing the ventilation area between the air intake / exhaust valve 3 and the external environment. When the pipeline pressure decreases, the inner cylinder 2 slides to the bottom of the outer cylinder 1. At this time, the first through hole 11 located below the top cover 21 of the inner cylinder 2 is blocked by the inner cylinder body 22 of the inner cylinder 2, and the second through hole 221 is blocked by both the inner and outer cylinders 1. The exchange of air between the air intake / exhaust valve 3 and the outside air is only carried out through the vent hole 211 provided on the top cover 21, thereby maintaining the stable operation of the pipeline. The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made according to the structure, shape, and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A sliding waterproof hammer structure for an intake and exhaust valve, characterized in that, include, The outer cylinder (1) has multiple sets of first through holes (11) on its cylinder wall. The multiple sets of first through holes (11) are equidistantly distributed on the outer cylinder (1) in the vertical direction. Each set of first through holes (11) includes multiple first through holes (11). The multiple first through holes (11) in each set are arranged in a ring array on the cylinder wall of the outer cylinder (1). The inner cylinder (2) is slidably disposed inside the outer cylinder (1) in a vertical direction. The inner cylinder (2) includes an inner cylinder body (22) and a top cover (21) disposed at the top of the inner cylinder body (22). The inner cylinder body (22) has multiple sets of second through holes (221). The multiple sets of second through holes (221) are equidistantly disposed on the inner cylinder body (22) in a vertical direction. Each set of second through holes (221) includes multiple second through holes (221). The multiple second through holes (221) in each set are arranged in a ring array on the inner cylinder body (22). The top cover (21) has a vent hole (211). When the inner cylinder (2) is located at the top of the outer cylinder (1), the first through hole (11) and the second through hole (221) are connected; when the inner cylinder (2) is located at the bottom of the outer cylinder (1), the first through hole (11) and the second through hole (221) located below the top cover (21) are closed.

2. The sliding waterproof hammer structure for an intake and exhaust valve according to claim 1, characterized in that, The spacing between two adjacent sets of the second through holes (221) is consistent with the vertical dimension of the first through hole (11); The spacing between two adjacent sets of the first through holes (11) is consistent with the vertical dimension of the second through hole (221).

3. The sliding waterproof hammer structure for an intake and exhaust valve according to claim 1, characterized in that, The top of the outer cylinder (1) is provided with a limiting edge (12).

4. A sliding waterproof hammer structure for an intake and exhaust valve according to claim 2, characterized in that, The first through hole (11) and the second through hole (221) are strip-shaped holes extending in a horizontal direction.

5. A sliding waterproof hammer structure for an intake and exhaust valve according to claim 3, characterized in that, The bottom end of the outer cylinder (1) is provided with a fixing ring plate (13), and the fixing ring plate (13) has a fixing hole (131).

6. A sliding waterproof hammer structure for an intake and exhaust valve according to claim 3, characterized in that, The limiting edge (12) and the outer cylinder (1) are integrally formed.

7. A sliding waterproof hammer structure for an intake and exhaust valve according to claim 1, characterized in that, The inner cylinder (22) and the top cover (21) are integrally formed.

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