CN113324096A - Water hammer valve with two-stage spring and air cavity - Google Patents
Water hammer valve with two-stage spring and air cavity Download PDFInfo
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- CN113324096A CN113324096A CN202110537741.3A CN202110537741A CN113324096A CN 113324096 A CN113324096 A CN 113324096A CN 202110537741 A CN202110537741 A CN 202110537741A CN 113324096 A CN113324096 A CN 113324096A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a waterproof hammer valve with two-stage springs and air cavities, which comprises two groups of springs, air cavities, buffer cavities, pistons, partition plates and valve covers, wherein the two groups of springs are connected with the air cavities; the two groups of springs are selected, wherein the first group of springs are springs with smaller stiffness coefficient, and the second group of springs are springs with larger stiffness coefficient; the air cavity is a section of air space between the partition plate and the piston; the buffer cavity is designed into a spherical structure, wherein the lower part of the buffer cavity is narrow and the upper part of the buffer cavity is wide; a damping gasket and two sealing rings are sequentially arranged at the position where the piston is contacted with the valve body; the partition plate is also provided with a sealing ring and a damping gasket; the valve cover is designed to be provided with a thread surface and is in threaded connection with the valve body. The invention adopts the combination of two stages of springs and air cavities to adapt to different operating environments, thereby improving the applicability of the waterproof hammer valve; by adopting the idea of multiple barriers, three sealing barriers are constructed, and the leakage rate of the valve is effectively reduced.
Description
Technical Field
The invention relates to a waterproof hammer valve with two-stage springs and an air cavity, and belongs to the technical field of pipeline valves.
Background
The water hammer phenomenon is a transient phenomenon which is widely existed in a pressure pipeline system, and the flow speed is changed sharply due to the pipeline being subjected to some external reason, so that the pressure intensity in the pipeline is changed alternately. During the process, pipeline vibration and huge noise are generated, and the pipeline is deformed and even damaged, so that the pipeline system is greatly damaged.
Many of the existing waterproof hammer valves adopt a combination mode of a spring and a piston to buffer and absorb pressure fluctuation and pipeline vibration caused by a water hammer, and the mode has a gap between a moving part and a static part, so that a medium in a pipeline leaks into the valve body and even into the environment under the condition of pressure difference between the interior of the valve body and the pipeline, and especially when corrosive, radioactive and other media are conveyed, the leakage rate is controlled to be very important. Meanwhile, when the pressure of the water hammer is too large, the spring and the cavity cannot be deformed continuously when being compressed to a certain degree, so that the applicable pressure range is limited.
Disclosure of Invention
The invention aims to solve the problems of leakage between a moving part and a static part of the existing waterproof hammer valve and small applicability, and provides the waterproof hammer valve with the two-stage spring-air cavity.
The purpose of the invention is realized as follows: the valve comprises a three-way valve body connected with a water delivery pipeline, a main pipeline delivers a pipeline medium, a narrow and wide valve water inlet channel is connected with the main pipeline, the water inlet channel is provided with a limiting inner shoulder, and a piston is arranged above the limiting inner shoulder; the valve is characterized in that a first group of springs are connected above the piston, the space where the first group of springs are located is a section of air cavity, the end parts of the first group of springs are connected with a partition plate, a second group of springs are connected above the partition plate, the space where the second group of springs are located is a spherical buffer cavity, the end parts of the second group of springs are connected with a valve cover, the valve cover is connected with the valve body, a valve rod is arranged on the valve cover, and a handle is arranged on the valve rod.
The invention also includes such structural features:
1. the second set of springs has a greater stiffness than the first set of springs.
2. The diameter of the partition is larger than that of the piston.
3. A sealing ring is arranged on the piston, and a rubber damping gasket is arranged at the contact position of the piston and the limiting inner shoulder; the contact position of the partition plate and the valve body is provided with a rubber damping gasket and a sealing ring.
Compared with the prior art, the invention has the beneficial effects that: 1. the two groups of springs used in the invention have different stiffness coefficients and different operating conditions. In the normal transient operation process of the pipeline, the second group of springs play a role in compressing the partition plate and isolating the air cavity from the buffer cavity, and at the moment, the first group of springs and the air cavity play a role in buffering and absorbing pipeline pressure fluctuation; in the process of severe pressure fluctuation of the pipeline, when the pressure of gas in the first group of springs and the gas cavity reaches the limit, the partition board is bounced off, the buffer cavity plays a role of providing a gas inlet space and a gas outlet space for the gas cavity, the energy in the first-stage spring-gas cavity is transferred to the second-stage spring-gas cavity, and the second group of springs and the buffer cavity play a role of buffering and absorbing the pressure of the pipeline, so that the operation interval of the water hammer valve is enlarged, and the applicability is improved. 2. The invention adopts the idea of multiple barriers to reduce the leakage of the pipeline medium from the valve to the external environment. The first barrier is two sealing rings arranged on the piston; the second barrier is a closed partition plate in the normal transient operation process and isolates the air cavity from the buffer cavity, and when pipeline media leak into the air cavity due to the pressure difference between the valve and the pipeline, the air cavity is small in size and is easy to reach a state of being balanced with the pressure in the pipeline, so that the leakage is reduced; the third barrier is that the valve cover is in threaded connection with the valve body, so that leakage to the environment is reduced. The low leakage rate of the waterproof hammer valve can expand the application range, so that the waterproof hammer valve is suitable for being used in a pipeline system for conveying harmful media such as corrosive media, radioactive media and the like. 3. The operation condition of the second-stage spring-air chamber can be adjusted through a valve cover connected with the second-stage spring-air chamber, and the compressed state of the second group of springs is changed through a handle. For the high requirement on pressure control but low requirement on leakage, the preset stress of the second group of springs can be reduced, so that the two stages of spring-air cavities jointly participate in working, and the buffering and absorbing capacity of the waterproof hammer valve is improved; for the low requirement on pressure control but high requirement on leakage, the preset stress of the second group of springs can be increased, so that the second group of springs cannot participate in pressure wave buffering and absorption under the non-extreme working condition, and a second leakage-proof barrier is established.
Drawings
FIG. 1 is a schematic cross-sectional structural view of the present invention;
as shown in fig. 1, a valve body 1, a main flow passage 2, a limiting inner shoulder 3, a damping gasket 4, a flange 5, a valve water inlet passage 6, a sealing ring 7, a piston 8, a first group of springs 9, an air cavity 10, a partition plate 11, a buffer cavity 12, a second group of springs 13, a thread surface 14, a handle 15, a valve rod 16 and a valve cover 17.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention adopts a first group of springs 9, a second group of springs 13, a piston 8, a partition plate 11, an air cavity 10, a buffer cavity 12 and a threaded valve cover 17. The first group of springs 9 are springs with low stiffness coefficient, the running space of the springs is an air cavity 10 between a partition plate 11 and the piston 8, the springs are relaxed in the initial state, and the first group of springs and the air cavity form a first-stage spring-air cavity. The second group of springs (13) adopt high-stiffness-coefficient springs, the operation space of the springs is a buffer cavity 12 between the partition plate 11 and the valve cover 17, and the initial state of the springs is under the action of preset stress; the space where the spring is located is a spherical buffer chamber, and the second group of springs and the buffer chamber form a second-stage spring-air cavity. The piston is located at the limiting inner shoulder 3, a damping gasket 4 is arranged between the piston and the limiting inner shoulder, and two rings of sealing rings 7 are arranged at the position contacted with the valve body 1. The air chamber 10 is filled with air and is a relatively sealed air space having the same pressure as the buffer chamber 12. The buffer cavity is designed into a spherical structure, the radius of an upper outlet is the same as that of the partition plate 11, the radius of a lower inlet is the same as that of the piston 8, and the interior of the buffer cavity is filled with air. The piston is movable up and down. And a sealing ring 7 and a damping gasket 4 are arranged at the contact part of the partition plate 11 and the valve body. The valve cover 17 is provided with threads and is connected with the valve body 1 through threads, and a valve rod 16 and a handle 15 are arranged on the valve cover. The radius of the clapboard is slightly larger than the radius of the water inlet pipeline of the valve.
Referring to fig. 1, the invention is a water hammer valve with two-stage spring-air cavity, comprising a valve body 1, wherein the valve body 1 is connected with a water pipeline through a flange 5, the valve body 1 adopts a three-way valve body, a main pipeline 2 conveys a pipeline medium, a valve water inlet channel 6 is connected with the main pipeline 2, and when pressure fluctuation occurs in the pipeline, pressure waves can be transmitted into the valve through the valve water inlet channel 6. The valve inlet channel 6 is narrow and wide, pressure wave damping is increased, and the limiting inner shoulder 3 is used for limiting the piston 8 to move in the valve inlet channel 6 and preventing fluid in the main channel 2 from being blocked.
Have set up damping washer 4 between piston 8 and the spacing interior shoulder 3, reduce piston and interior shoulder striking noise, piston 8 has set up two sealing washer 7 with valve body contact department, reduces the leakage of pipeline medium to air cavity 10 under the effect of pressure differential, and piston 8 top is connected with first group spring 9, and the coefficient of stiffness of first group spring 9 is less, can carry out the pressure wave in the deformation dissipation absorption pipeline with air cavity 10 gas under the small pressure fluctuation.
The first group of springs 9 are connected with a partition plate 11, a sealing ring 7 is arranged at the contact position of the partition plate 11 and the valve body 1, and the partition plate 11 isolates an air cavity 10 from a buffer cavity 12 to enable the air cavity 10 to be in a relatively sealed state. When the pipeline medium leaks into the air cavity 10 due to the pressure difference, the air cavity 10 is small in size and is easily in a state of being balanced with the pressure inside the pipeline, so that the leakage is reduced. The shock absorption gasket 4 is arranged on the partition board to reduce impact noise.
The partition plate 11 is connected with a second group of springs 13, and the upper ends of the second group of springs 13 are connected with a valve cover 17. The second set of springs 13 has a higher stiffness coefficient and is tightly pressed against the diaphragm 11 under the action of the valve cover 17, so that the second set of springs 13 do not participate in the operation when the pressure fluctuation of the pipeline is small, and the second set of springs 13 participate in the operation only when the diaphragm 11 is bounced off when the water hammer pressure reaches a threshold value. The space in which the second set of springs 13 is located is a spherical buffer chamber 12, the pressure of the buffer chamber 12 is the same as that of the air chamber 10, and the buffer chamber 12 can provide air outlet and air inlet spaces for the air chamber 10, so that pressure wave damping is improved.
The valve cover 13 is connected with the valve body 1 through threads 14, a valve rod 16 is arranged on the valve cover 13 and is connected with a handle 15, and the second group of springs 13 can be pressurized through the handle 15 so as to change the working state of the springs. The thread flanks 14 reduce leakage of medium from the valve body into the environment.
The principle of the waterproof hammer valve with the two-stage spring-air cavity is as follows:
in use, the valve is flanged to a pipe to allow the pipe medium to flow through the valve internal passage, communicating with the valve inlet passage 6. When the pipeline takes place the water hammer phenomenon because of stopping the pump or closing the valve and leading, when the pressure wave propagated to the water hammer valve in the pipeline, because first group spring 9 and piston 8 produced deformation under the effect of pressure, played the effect of water hammer wave damping. Under normal pressure fluctuation, only the first group of springs 9 and the air cavity 10 participate in the work of the first-stage spring-air cavity, and at the moment, the air cavity and the buffer cavity 12 are isolated by the partition plate 11 to form a second barrier for reducing leakage; when the pressure fluctuation exceeds the operating pressure of the first-stage spring-air cavity, the partition plate 11 is bounced open, the compressed air in the air cavity 10 enters the buffer cavity 12 and exchanges air with the buffer cavity, the energy absorbed by the air in the air cavity 10 due to elastic deformation is released into the buffer cavity 12, and at the moment, the second-stage spring-air cavity of the second group of springs 13 and the buffer cavity 12 participates in work to buffer and absorb the pipeline pressure fluctuation together.
The operating pressure of the second group of springs 13 can be controlled by the preset spring stress through the valve cover 17 connected with the second group of springs, the preset stress of the second group of springs 13 can be reduced for high pressure control requirement and low leakage requirement, so that the first group of springs 9 and the second group of springs 13 participate in the work together, and the buffering and absorbing capacity of the waterproof hammer valve is improved; for the low requirement on pressure control but the high requirement on leakage, the preset stress of the second group of springs 13 can be increased, so that the second group of springs can not participate in pressure wave buffering and absorption under the non-extreme working condition, and at the moment, three barriers for reducing leakage exist, namely the piston 8, the sealing ring 7 on the piston, the partition plate 11 and the valve cover 17 in threaded connection with the valve body 1, so that the leakage rate at the valve is effectively reduced.
In summary, the invention discloses a waterproof hammer valve with two-stage spring-air cavities, which comprises two groups of springs 9 and 13, an air cavity 10, a buffer cavity 12, a piston 8, a partition plate 11 and a valve cover 17; the two groups of springs are selected, wherein the first group of springs 9 are springs with smaller stiffness coefficient, and the second group of springs 13 are springs with larger stiffness coefficient; the air cavity 10 is a section of air space between the partition plate 11 and the piston 8; the buffer cavity 12 is designed into a spherical structure, wherein the lower part is narrow and the upper part is wide; a damping gasket 4 and two sealing rings 7 are sequentially arranged at the position where the piston 8 is contacted with the valve body; the partition plate 11 is also provided with a sealing ring 7 and a damping gasket 4; the valve cover 17 is designed with a threaded surface and is screwed to the valve body. The invention adopts the combination of two stages of springs and air cavities to adapt to different operating environments, thereby improving the applicability of the waterproof hammer valve; by adopting the idea of multiple barriers, three sealing barriers are constructed, and the leakage rate of the valve is effectively reduced.
Claims (5)
1. The utility model provides a water hammer valve with two-stage spring and air cavity which characterized in that: the valve comprises a three-way valve body connected with a water delivery pipeline, a main pipeline delivers a pipeline medium, a narrow and wide valve water inlet channel is connected with the main pipeline, the water inlet channel is provided with a limiting inner shoulder, and a piston is arranged above the limiting inner shoulder; the valve is characterized in that a first group of springs are connected above the piston, the space where the first group of springs are located is a section of air cavity, the end parts of the first group of springs are connected with a partition plate, a second group of springs are connected above the partition plate, the space where the second group of springs are located is a spherical buffer cavity, the end parts of the second group of springs are connected with a valve cover, the valve cover is connected with the valve body, a valve rod is arranged on the valve cover, and a handle is arranged on the valve rod.
2. The watertight hammer valve with a two-stage spring and air chamber according to claim 1, wherein: the second set of springs has a greater stiffness than the first set of springs.
3. The watertight hammer valve with a two-stage spring and air chamber according to claim 1 or 2, wherein: the diameter of the partition is larger than that of the piston.
4. The watertight hammer valve with a two-stage spring and air chamber according to claim 1 or 2, wherein: a sealing ring is arranged on the piston, and a rubber damping gasket is arranged at the contact position of the piston and the limiting inner shoulder; the contact position of the partition plate and the valve body is provided with a rubber damping gasket and a sealing ring.
5. The watertight hammer valve with a two-stage spring and air chamber according to claim 1 or 2, wherein: a sealing ring is arranged on the piston, and a rubber damping gasket is arranged at the contact position of the piston and the limiting inner shoulder; the contact position of the partition plate and the valve body is provided with a rubber damping gasket and a sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537741.3A CN113324096B (en) | 2021-05-18 | 2021-05-18 | Water hammer valve with two-stage spring and air cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537741.3A CN113324096B (en) | 2021-05-18 | 2021-05-18 | Water hammer valve with two-stage spring and air cavity |
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| Publication Number | Publication Date |
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| CN113324096A true CN113324096A (en) | 2021-08-31 |
| CN113324096B CN113324096B (en) | 2023-01-03 |
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| CN202110537741.3A Active CN113324096B (en) | 2021-05-18 | 2021-05-18 | Water hammer valve with two-stage spring and air cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2818615C1 (en) * | 2023-03-15 | 2024-05-03 | Федеральное государственное автономное образовательное учреждение высшего образования "Омский государственный технический университет" | Method of piston compressor operation and device for implementation thereof (embodiments) |
| CN118462879A (en) * | 2024-07-11 | 2024-08-09 | 泰伦机械(苏州)有限公司 | Large-caliber high-pressure check valve with buffer device |
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| CN118462879A (en) * | 2024-07-11 | 2024-08-09 | 泰伦机械(苏州)有限公司 | Large-caliber high-pressure check valve with buffer device |
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| CN113324096B (en) | 2023-01-03 |
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