Self-operated high-pressure pressure relief waterproof hammer valve
By designing a self-operated high-pressure relief water hammer valve, and utilizing a multi-stage buffering mechanism consisting of an air chamber, a pressure relief chamber, and a buffer structure, the problem of existing water hammer valves being unable to completely eliminate water hammer impact force is solved, achieving effective buffering and pressure relief of water hammer impact force.
Patent Information
- Application Number
- CN202520201725.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-10
AI Technical Summary
Existing water hammer valves have limited piston travel during water hammer events, resulting in insufficient gas pressure in the gas chamber to completely eliminate the impact of water hammer, making it difficult to effectively buffer the effects of water hammer.
A self-operated high-pressure relief valve for water hammer prevention was designed, comprising an air chamber, a pressure relief chamber, and a buffer structure. Multiple buffers are formed by the air pressure in the air chamber, the space of the pressure relief chamber, and the elasticity of the buffer structure. Water is introduced into the pressure relief chamber through the water passage for further buffering, thereby eliminating the impact force of water hammer to the greatest extent.
In the event of water hammer, multiple buffering mechanisms effectively buffer the impact of water hammer, ensuring the effectiveness of water hammer prevention and avoiding incomplete depressurization caused by insufficient air pressure when the piston moves upward.
Smart Images
Figure CN223648722U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waterproof hammer valves, and in particular to a self-operated high-pressure relief waterproof hammer valve. Background Technology
[0002] A water hammer valve is a type of valve installed in a pipeline system to prevent water hammer. When water hammer occurs, the water impacts the piston of the valve, causing it to move towards the gas chamber. This compresses the gas in the chamber, increasing its pressure. Under the combined action of the pressurized gas and the irregular water hammer, the piston moves up and down, creating a dynamic balance that effectively eliminates the impact.
[0003] Therefore, it can be seen that the dynamic balance depends on the fact that the gas pressure and the impact force of water hammer are not too far apart. However, in actual use, the piston's stroke has a limit, and the gas pressure in the gas chamber depends on the piston's stroke, resulting in a limited gas pressure in the gas chamber. The impact force of water hammer depends on the momentum of the water at that time. Therefore, when water hammer occurs, the impact force of water hammer is very likely to be greater than the gas pressure, making it difficult for the water hammer valve to completely eliminate the influence of water hammer. Summary of the Invention
[0004] The present invention aims to solve the existing technical problem by providing a self-operated high-pressure relief water hammer valve, which can eliminate the impact force of water hammer to the greatest extent. Even if the impact force of water hammer is much greater than the gas pressure in the gas chamber, it can effectively buffer the impact force of water hammer and eliminate the influence of water hammer phenomenon.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0006] This utility model discloses a self-operated high-pressure relief valve for preventing water hammer, comprising a valve body and an air chamber located inside the valve body. A water inlet connector communicating with the air chamber is located at the center of the lower end face of the valve body. A matching piston is located in the lower part of the air chamber, with the lower end of the piston sealing the upper end of the water inlet connector. The valve body is fitted with a tubular shell. A coaxial connecting seat is located below the shell. A positioning groove is located at the center of the upper end face of the connecting seat. An installation connector communicating with the bottom of the positioning groove is located at the center of the lower end face of the connecting seat. The water inlet connector is screwed into the installation connector, and the lower end face of the valve body is aligned with the bottom of the positioning groove. The positioning groove has an annular threaded groove on its inner wall, and the lower end of the housing is threaded into the threaded groove. The upper end face of the housing is higher than the upper end face of the valve body. A sealing cap is threaded onto the upper end of the housing. A pressure relief chamber is formed by the lower wall of the threaded groove, the inner wall of the housing, the inner wall of the sealing cap, and the outer wall of the valve body. A buffer structure matching the sealing cap is provided on the upper part of the pressure relief chamber. The lower part of the valve body has several water passage holes evenly distributed in a circle, and the pressure relief chamber communicates with the air chamber through the water passage holes. The position of the water passage holes is lower than the upper end face of the piston, and the outer circumferential surface of the piston covers and seals the inner end opening of the water passage holes.
[0007] The buffer structure includes a locking step located on the inner wall of the upper end of the pressure relief chamber, the locking step being annular; the inner wall of the upper side of the sealing cover is provided with an annular fastening part, the outer circumferential surface of the fastening part being in contact with the inner wall of the shell; a buffer diaphragm is provided between the lower surface of the fastening part and the upper surface of the locking step.
[0008] The upper part of the fastening part is provided with a matching rubber pad; the center of the upper inner wall of the sealing cover is provided with an embedding hole; the center of the upper surface of the rubber pad is provided with an embedding part that matches the embedding hole; there is a deformation gap between the lower surface of the rubber pad and the upper surface of the buffer diaphragm.
[0009] The inner wall of the lower end port of the fastening part is provided with an annular notch; a matching anti-wear washer is provided in the notch, the anti-wear washer is made of rubber; the inner edge of the lower end port of the anti-wear washer has rounded corners.
[0010] The lower surface of the fastening part is provided with an annular sealing groove; a matching sealing ring is provided in the sealing groove.
[0011] The upper part of the air chamber is provided with a matching limiting pad; the upper inner wall of the air chamber is provided with an annular limiting groove; the upper outer wall of the limiting pad is provided with a limiting protrusion that matches the limiting groove; the limiting pad and the limiting protrusion are integrally formed and are both made of rubber.
[0012] The piston outer wall is provided with several annular grooves evenly distributed axially; an O-ring is provided in the annular groove to match it.
[0013] The beneficial effects of this utility model are:
[0014] Compared with the prior art, the self-operated high-pressure relief water hammer valve with the structure of this utility model can form a first buffer through the air pressure in the air chamber when water hammer occurs, a second buffer through the space of the pressure relief chamber, and a third buffer through the elasticity of the buffer structure. Even if the piston moves up and the air pressure in the air chamber rises, it still cannot completely buffer the impact force generated by water hammer. Water can be introduced into the pressure relief chamber through the water passage, and the pressure relief effect of the pressure relief chamber and the elasticity of the buffer structure can be used to further buffer the impact force, thus maximizing the water hammer prevention effect. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of the self-operated high-pressure relief and water hammer valve of this utility model;
[0016] Figure 2 yes Figure 1 An enlarged view of part A;
[0017] Figure 3 This is a schematic diagram of the structure of the self-operated high-pressure relief water hammer valve of this utility model. Detailed Implementation
[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0019] Please see Figures 1 to 3 This utility model provides a self-operated high-pressure relief valve for water hammer prevention, including a valve body 1, an air chamber 2 inside the valve body 1, a water inlet connector 3 communicating with the air chamber 2 at the center of the lower end face of the valve body 1, a matching piston 5 in the lower part of the air chamber 2, the lower end of the piston 5 blocking and sealing the upper end of the water inlet connector 3, a tubular shell 6 covering the valve body 1, a coaxial connecting seat 7 at the bottom of the shell 6, a positioning groove 8 at the center of the upper end face of the connecting seat 7, and an installation connector 9 communicating with the bottom of the positioning groove 8 at the center of the lower end face of the connecting seat 7, the water inlet connector 3 being screwed into the installation connector 9, and the lower end face of the valve body 1 fitting against the bottom of the positioning groove 8; the positioning groove 8 being screwed into the mounting connector 9, the lower end face of the valve body 1 fitting against the bottom of the positioning groove 8; the positioning groove 8 being screwed into the mounting connector 9, the lower end face of the valve body 1 fitting against the bottom of the positioning groove 8; the positioning groove 8 being screwed into the air chamber 1 ... A ring-shaped threaded groove 10 is provided on the inner wall of the upper groove opening of the slot 8, and the lower end of the housing 6 is threaded into the threaded groove 10; the upper end face of the housing 6 is higher than the upper end face of the valve body 1; a sealing cap 11 is threaded onto the upper end of the housing 6; a pressure relief chamber 12 is formed by the lower groove wall of the threaded groove 10, the inner wall of the housing 6, the inner wall of the sealing cap 11, and the outer wall of the valve body 1; a buffer structure matching the sealing cap 11 is provided on the upper part of the pressure relief chamber 12; a number of water passage holes 13 are provided on the lower part of the valve body 1 in a circularly evenly distributed manner, and the pressure relief chamber 12 communicates with the air chamber 2 through the water passage holes 13; the position of the water passage holes 13 is lower than the upper end face of the piston 5, and the outer peripheral surface of the piston 5 covers and seals the inner end opening of the water passage hole 13.
[0020] The buffer structure includes a locking step 14 located on the inner wall of the upper end of the pressure relief chamber 12, the locking step 14 being annular; the inner wall of the upper side of the sealing cover 11 is provided with an annular fastening part 15, the outer peripheral surface of the fastening part 15 being in contact with the inner wall of the housing 6; a buffer diaphragm 16 is provided between the lower surface of the fastening part 15 and the upper surface of the locking step 14.
[0021] The upper part of the fastening part 15 is provided with a matching rubber pad 17; the center of the upper inner wall of the sealing cover 11 is provided with an embedding hole 18; the center of the upper surface of the rubber pad 17 is provided with an embedding part 19 that matches the embedding hole 18; there is a deformation gap 20 between the lower surface of the rubber pad 17 and the upper surface of the buffer diaphragm 16.
[0022] The inner wall of the lower end port of the fastening part 15 is provided with an annular notch 21; a matching anti-wear washer 22 is provided in the notch 21, the anti-wear washer 22 is made of rubber; the inner edge of the lower end port of the anti-wear washer 22 has a rounded corner 23.
[0023] The lower surface of the fastening part 15 is provided with an annular sealing groove 24; a matching sealing ring 25 is provided in the sealing groove 24.
[0024] The upper part of the air chamber 2 is provided with a matching limiting pad 26; the upper inner wall of the air chamber 2 is provided with an annular limiting groove 27; the upper outer wall of the limiting pad 26 is provided with a limiting protrusion 28 that matches the limiting groove 27; the limiting pad 26 and the limiting protrusion 28 are integrally formed and are both made of rubber.
[0025] The piston 5 has several annular grooves 29 evenly distributed axially on its outer wall; and an O-ring 30 matching the grooves 29 is provided inside the annular grooves 29.
[0026] The method of using this utility model is as follows:
[0027] The presence of the mounting connector 9 facilitates the installation of the water hammer valve on the piping system. When water hammer occurs in the pipeline, the impact force generated by the water hammer will directly impact the lower surface of the piston 5 through the water inlet connector 3. At this time, the piston 5 moves upward. After the piston 5 moves upward, the actual volume of the gas chamber 2 becomes smaller, and the gas pressure in the gas chamber 2 continues to rise. The high pressure formed in the gas chamber 2 can effectively buffer the impact force acting on the piston 5.
[0028] If the impact force generated by the water hammer is too large, it will continuously push the piston 5 upwards until the lower end of the piston 5 is higher than the position of the water passage hole 13. At this point, the outer circumference of the piston 5 no longer blocks and seals the inner end of the water passage hole 13. A portion of the water that was originally impacting the piston 5 through the water inlet connector 3 will be diverted and enter the pressure relief chamber 12 through the water passage hole 13. The existence of the pressure relief chamber 12 effectively increases the actual volume of the air chamber 2, achieving a pressure relief effect and allowing the impact force generated by the water hammer to be effectively released. As water continues to flow into the pressure relief chamber, the space inside the pressure relief chamber 12 will eventually be completely filled. If water continues to flow into the pressure relief chamber 12 at this point, it will cause the water pressure inside the pressure relief chamber 12 to rise. The pressure will be pushed upward by the lower surface of the buffer diaphragm 16. The buffer diaphragm 16 is an elastic element and can be made of rubber or other elastic materials. When the buffer diaphragm 16 deforms upward, it will generate elastic force, which will effectively buffer the water pressure and thus buffer the impact force of water hammer. When the water pressure in the pipeline returns to normal, not only will the piston 5 move down and reset under the action of the air pressure in the air chamber 2, but the water flow that entered the pressure relief chamber 12 will also flow back to the water inlet connector 3 through the water passage 13 under the action of gravity and the elastic force of the buffer diaphragm 16. Even if some water flow remains in the pressure relief chamber 12, it will not affect the pressure relief effect in the pressure relief chamber 12 or the buffering effect of the buffer diaphragm 16.
[0029] In summary, when water hammer occurs, the present invention can form a first buffer through the air pressure in the air chamber 2, a second buffer through the space of the pressure relief chamber 12, and a third buffer through the elasticity of the buffer structure. Even if the piston 5 moves upward and the air pressure in the air chamber 2 increases, it still cannot completely buffer the impact force generated by water hammer. Water can also be introduced into the pressure relief chamber 12 through the water passage 13. The pressure relief effect of the pressure relief chamber 12 and the elasticity of the buffer structure can be used to further buffer the impact force, thus maximizing the water hammer prevention effect.
[0030] The upper part of the fastening part 15 is provided with a matching rubber pad 17. The center of the upper inner wall of the sealing cover 11 is provided with an embedding hole 18. The center of the upper surface of the rubber pad 17 is provided with an embedding part 19 that matches the embedding hole 18. There is a deformation gap 20 between the lower surface of the rubber pad 17 and the upper surface of the buffer diaphragm 16. The existence of the deformation gap 20 ensures that the buffer diaphragm 16 has enough space to deform upward when it is compressed. When the buffer diaphragm 16 deforms upward to a certain extent, it will contact the lower surface of the rubber pad 17. When the rubber pad 17 is compressed, the elasticity of the rubber pad 17 will be added to the buffer diaphragm 16, thereby indirectly increasing the elasticity of the buffer diaphragm 16 and further improving the buffering effect of the buffer diaphragm 16.
[0031] The inner wall of the lower end port of the fastening part 15 is provided with an annular notch 21. A matching anti-wear washer 22 is provided in the notch 21. The anti-wear washer 22 is made of rubber. The inner edge of the lower end port of the anti-wear washer 22 has a rounded corner 23. The rubber material of the anti-wear washer 22 and its own rounded corner 23 can effectively prevent the buffer diaphragm 16 from directly contacting the sharp inner edge of the lower end port of the fastening part 15 when it deforms upward, thus avoiding damage.
[0032] The lower surface of the fastening part 15 is provided with an annular sealing groove 24, and a matching sealing ring 25 is provided in the sealing groove 24. The presence of the sealing ring 25 can effectively buffer the sealing between the outer edge of the upper surface of the diaphragm 16 and the lower surface of the fastening part 15, and prevent water leakage.
[0033] The upper part of the air chamber 2 is provided with a matching limiting pad 26. The upper inner wall of the air chamber 2 is provided with an annular limiting groove 27. The upper outer wall of the limiting pad 26 is provided with a limiting protrusion 28 that matches the limiting groove 27. The limiting pad 26 and the limiting protrusion 28 are integrally formed and are both made of rubber. The presence of the limiting pad 26 can effectively limit the upward stroke of the piston 5. By controlling the upward stroke of the piston 5, it can effectively ensure that the increase of air pressure in the air chamber 2, the space of the pressure relief chamber 12 and the elasticity of the buffer structure can all play a buffering role, while facilitating the backflow of water in the pressure relief chamber 12.
[0034] The outer wall of the piston 5 is provided with several annular grooves 29 evenly distributed in the axial direction. The annular grooves 29 are provided with matching O-rings 30. The presence of O-rings 30 can effectively ensure the sealing between the outer circumferential surface of the piston 5 and the inner wall of the gas chamber 2, and prevent water leakage and air leakage.
Claims
1. A self-operated high-pressure relief valve for water hammer prevention, comprising a valve body, an air chamber disposed inside the valve body, a water inlet connector communicating with the air chamber at the center of the lower end face of the valve body, and a matching piston disposed in the lower part of the air chamber, the lower end of the piston blocking and sealing the upper end of the water inlet connector, characterized in that: The valve body is fitted with a tubular shell; a coaxial connecting seat is located below the shell; a positioning groove is located at the center of the upper end face of the connecting seat; an installation joint communicating with the bottom of the positioning groove is located at the center of the lower end face of the connecting seat; the water inlet connector is screwed into the installation joint, and the lower end face of the valve body is in contact with the bottom of the positioning groove; an annular threaded groove is located on the inner wall of the upper opening of the positioning groove, and the lower end of the shell is screwed into the threaded groove; the upper end face of the shell is higher than the upper end face of the valve body; a sealing cap is screwed onto the upper end of the shell; a pressure relief chamber is formed by the lower wall of the threaded groove, the inner wall of the shell, the inner wall of the sealing cap, and the outer wall of the valve body; a buffer structure matching the sealing cap is located at the upper part of the pressure relief chamber; several circumferentially distributed water passages are located at the lower part of the valve body, and the pressure relief chamber communicates with the air chamber through the water passages; the position of the water passages is lower than the upper end face of the piston, and the outer circumferential surface of the piston covers and seals the inner end opening of the water passages.
2. The self-operated high-pressure relief valve for preventing water hammer according to claim 1, characterized in that: The buffer structure includes a locking step located on the inner wall of the upper end of the pressure relief chamber, the locking step being annular; the inner wall of the upper side of the sealing cover is provided with an annular fastening part, the outer circumferential surface of the fastening part being in contact with the inner wall of the shell; a buffer diaphragm is provided between the lower surface of the fastening part and the upper surface of the locking step.
3. The self-operated high-pressure relief valve for preventing water hammer according to claim 2, characterized in that: The upper part of the fastening part is provided with a matching rubber pad; the center of the upper inner wall of the sealing cover is provided with an embedding hole; the center of the upper surface of the rubber pad is provided with an embedding part that matches the embedding hole; there is a deformation gap between the lower surface of the rubber pad and the upper surface of the buffer diaphragm.
4. A self-operated high-pressure relief valve for preventing water hammer according to claim 2, characterized in that: The inner wall of the lower end port of the fastening part is provided with an annular notch; a matching anti-wear washer is provided in the notch, the anti-wear washer is made of rubber; the inner edge of the lower end port of the anti-wear washer has rounded corners.
5. A self-operated high-pressure relief valve for preventing water hammer according to claim 2, characterized in that: The lower surface of the fastening part is provided with an annular sealing groove; a matching sealing ring is provided inside the sealing groove.
6. A self-operated high-pressure relief valve for preventing water hammer according to claim 1, characterized in that: The upper part of the air chamber is provided with a matching limiting pad; the upper inner wall of the air chamber is provided with an annular limiting groove; the upper outer wall of the limiting pad is provided with a limiting protrusion that matches the limiting groove; the limiting pad and the limiting protrusion are integrally formed and are both made of rubber.
7. A self-operated high-pressure relief valve for preventing water hammer according to claim 1, characterized in that: The piston outer wall is provided with several annular grooves evenly distributed axially; an O-ring is provided in each annular groove.