CN210510493U - Water hammer-proof air valve - Google Patents
Water hammer-proof air valve Download PDFInfo
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- CN210510493U CN210510493U CN201921411595.4U CN201921411595U CN210510493U CN 210510493 U CN210510493 U CN 210510493U CN 201921411595 U CN201921411595 U CN 201921411595U CN 210510493 U CN210510493 U CN 210510493U
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- water hammer
- exhaust
- filter screen
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Abstract
The utility model discloses a valve technical field's a water hammer air valve, including the valve body, the valve gap, the floater, the filter screen protects a section of thick bamboo, the buffer board, keep off the ring, fly net, the exhaust hood, the micro-exhaust subassembly, the blowdown subassembly, wash the subassembly, the valve body passes through fixing bolt fixed connection with the valve gap, and the buffer board is placed on the step in the valve gap, keeps off the ring and is located the buffer board top, and the baffle passes through screw thread and valve gap connection, and the floater is placed in the filter screen protects a section of thick bamboo, and the blowdown subassembly, wash subassembly and micro-exhaust subassembly and valve body pass through threaded connection. The utility model discloses because set up buffer in the valve gap, with the self-reducing exhaust hole area under the water hammer operating mode, the restriction air discharge slows down the water column and closes speed, effectively absorbs and restricts the undulant range of water hammer.
Description
Technical Field
The utility model relates to the technical field of valves, specifically be a water hammer prevention air valve.
Background
In the prior art, the air valve has the structural form: the valve body is provided with a buffer seat, and the buffer seat is connected with the valve body through a rib, so that a simple water hammer prevention effect is achieved.
But has the following disadvantages: (1) when water conservancy transition occurs in the pipeline, the gas-liquid two phases of the pipeline have complex change states, interference factors cannot be predicted, gas in the pipeline is complex to discharge, and a closure water hammer which is more complex than a general water hammer cannot be eliminated; (2) the exhaust is unstable, which may cause a large amount of water to gush out; (3) the valve body is provided with a buffer seat which can affect the high-speed air suction and micro-exhaust processes, and therefore, a water hammer preventing air valve is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water hammer air valve to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a water hammer prevention air valve comprises a valve body, a valve cover, a floating ball, a filter screen protecting cylinder, a buffer plate, a baffle ring, an insect prevention net, an exhaust hood, a micro exhaust assembly, a pollution discharge assembly and a cleaning assembly, wherein the valve body comprises a medium inlet, a medium outlet, a sewage discharge outlet, a micro exhaust port and a valve cavity, the axial direction of the medium inlet coincides with the axial direction of the medium outlet, the valve cavity is positioned between the medium inlet and the outlet, the drift diameter of the valve cavity is larger than that of the medium inlet, the drift diameter of the medium inlet is equal to that of the medium outlet, a buffer seat is cast at the bottom of the valve cavity, the buffer seat and the valve cavity are coaxial, a small hole is arranged in the middle of the buffer seat, the valve cover and the medium inlet are coaxial, the filter screen protecting cylinder is arranged in the valve cavity of the valve body, the filter screen protecting cylinder and the valve body are coaxial, the filter screen protects a section of thick bamboo and is formed by the filter screen welding of circular flat board, cylindric bottom for the circular arc, and circular flat board height is less than valve body medium export plane, and thickness equals the valve body recess, the filter screen protects a section of thick bamboo height and is higher than the buffing pad, fly net and valve gap are with the axial, fly net is located between exhaust hood and the valve gap, the exhaust hood sets up at fly net top, the buffer board is placed on the step in the valve gap, buffer board and valve gap are with the axial, be provided with the aperture in the middle of the buffer board, the fender ring is located the buffer board top, fender ring and buffer board are with the axial, be provided with the aperture in the middle of the fender ring.
Furthermore, an O-shaped ring is arranged between the bottom of the valve cover and the outlet of the valve body, and the number of the O-shaped rings is one group.
Furthermore, the bottom of the valve cover is provided with an embedded groove for placing a rubber sealing ring.
Furthermore, a seam allowance is arranged between the valve body and the valve cover, a notch is formed in the valve body, and a convex opening is formed in the valve cover.
Further, the valve body is connected with the valve cover through a first bolt, a first nut and a washer.
Furthermore, the inner and outer surfaces of the valve body and the valve cover are covered with epoxy resin coatings.
Furthermore, the micro-exhaust assembly is connected with the valve body through conical threads, the sewage discharge assembly is connected with the valve body through conical threads, and the cleaning assembly is connected with the valve body through conical threads.
Further, the exhaust hood is fixed with the valve cover through a stud bolt and a nut, and the baffle ring is fixedly connected with the valve cover through threads.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model has simple structure, novel and reasonable design and convenient manufacture and use;
2) the utility model integrates a high-speed air inlet and outlet valve, a micro-air outlet valve and an air outlet interception buffer device, and has compact structure and perfect function;
3) the micro exhaust valve adopts a stainless steel framework rubber lining structure, has small sealing contact area and reliable sealing, and ensures the continuous and smooth micro exhaust process;
4) the utility model has the functions of high-speed exhaust without blowing blockage, preventing closing of a water hammer, throttling exhaust and air retention to form a buffer air bag to slow down water column bridging energy, ensuring safe water filling speed, continuously exhausting in trace amount to improve water delivery efficiency, high-speed suction during emptying of a pipeline to prevent negative pressure of the pipeline and the like;
5) the utility model discloses the throttle can not breathe in at a high speed and the trace exhaust causes any influence because increase throttle buffer to the high-speed exhaust that causes the cutout to close the water hammer and throttle, can form the buffering air pocket of guard action in the pipeline, reaches to reduce to close the water hammer energy, subducts the safe purpose of water hammer protection pipeline.
Drawings
Fig. 1 is a schematic structural view of a water hammer prevention air valve according to the present invention in an open state;
fig. 2 is a schematic structural view of the water hammer air valve of the present invention in a closed state.
In the figure: 1. a valve body; 2. a filter screen protecting cylinder; 3. a floating ball; 4. a first bolt; 5. a first nut; 6. a gasket; 7. an O-shaped ring; 8. a seal ring; 9. a valve cover; 10. cleaning the assembly; 11. a buffer plate; 12. a baffle ring; 13. a second bolt; 14. a second nut; 15. a third nut; 16. an insect-proof net; 17. an exhaust hood; 18. a hoisting ring; 19. a micro exhaust assembly; 20. a blowdown assembly; 21. a buffer seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a kind of water hammer air valve, please refer to figure 1, including the valve block 1, the valve bonnet 9, the floating ball 3, the filter screen protects the tube 2, the buffer board 11, the baffle ring 12, the fly net 16, the exhaust hood 17, the micro-exhaust assembly 19, the blow-off assembly 20 and washes the assembly 10, the floating ball 3 can be seen from figure 1, the bottom of the floating ball 3 has guide bars, the guide bar cooperates with aperture on the filter screen protects the tube 2 to make the floating ball 3 do the up-and-down movement with the stroke restriction in the filter screen 2 unimpededly, the bottom of the guide bar is connected with buffer base 21, the valve block 1 includes the medium entrance, the medium outlet, the drain, the micro-exhaust port and the valve chamber, the medium entrance, the medium outlet, the drain, the micro-exhaust port quantity are a series, the axial of the medium entrance coincides with axial of the medium outlet, the valve chamber locates between medium entrance and outlet, the through diameter of the valve chamber is greater than the through diameter, the bottom of the valve cavity is cast with a buffer seat 21, the buffer seat 21 and the valve cavity are in the same axial direction, a small hole is arranged in the middle of the buffer seat 21, a valve cover 9 and a medium inlet are in the same axial direction, a filter screen protective cylinder 2 is arranged in the valve cavity of the valve body 1, the filter screen protective cylinder 2 and the valve body 1 are in the same axial direction, an outlet flange of the valve body 1 is provided with a groove, the filter screen protective cylinder 2 is arranged on the groove at the outlet end of the valve body 1, the filter screen protective cylinder 2 is formed by welding a circular flat plate and a filter screen with an arc-shaped bottom, the height of the circular flat plate is lower than the medium outlet plane of the valve body 1, the thickness of the circular flat plate is equal to that of the groove of the valve body 1, the height of the filter screen protective cylinder 2 is higher than that of the buffer seat 21, the insect-proof net 16 and the valve cover 9 are in the same axial direction, the vertical section of the exhaust hood 17 is in an inverted U shape, the buffer plate 11 is placed on a step in the valve cover 9, the buffer plate 11 is made of rubber, the buffer plate 11 and the valve cover 9 are coaxial, a small hole is formed in the middle of the buffer plate 11, the baffle ring 12 is located above the buffer plate 11, the baffle ring 12 and the buffer plate 11 are coaxial, and a small hole is formed in the middle of the baffle ring 12.
As shown in fig. 1 and 2: o-shaped rings 7 are arranged between the bottom of the valve cover 9 and the outlet of the valve body 1, and the number of the O-shaped rings 7 is one group, so that the sealing property is ensured;
as shown in fig. 1 and 2: an embedded groove for placing a sealing ring 8 is formed in the bottom of the valve cover 9, the sealing ring 8 is installed in the embedded groove, and the sealing ring 8 is a rubber sealing ring, so that the sealing property is ensured;
as shown in fig. 1 and 2: a spigot is arranged between the valve body 1 and the valve cover 9, a notch is arranged on the valve body 1, and a convex opening is arranged on the valve cover 9;
as shown in fig. 1 and 2: the valve body 1 is connected with the valve cover 9 through the first bolt 4, the first nut 5 and the gasket 6, so that the mutual connection tightness between the valve body 1 and the valve cover 9 is ensured, the disassembly and maintenance are convenient, and the long-term use quality is ensured;
as shown in fig. 1 and 2: the inner and outer surfaces of the valve body 1 and the valve cover 9 are covered with epoxy resin coatings, so that the corrosion resistance and other properties of the valve body 1 and the valve cover 9 are improved, and the service lives of the valve body 1 and the valve cover 9 are prolonged;
as shown in fig. 1 and 2: the micro exhaust assembly 19 is connected with the valve body 1 through a taper thread, the sewage discharge assembly 20 is connected with the valve body 1 through a taper thread, the cleaning assembly 10 is connected with the valve body 1 through a taper thread, and the micro exhaust assembly 19, the sewage discharge assembly 20 and the cleaning assembly 10 are all in the prior art, and are not in the technical characteristics of the utility model, and the structures are widely applied in the field, so that the micro exhaust assembly 19, the sewage discharge assembly 20 and the cleaning assembly 10 can be flexibly selected by the technicians in the field, and the detailed description is omitted;
as shown in fig. 1 and 2: the exhaust hood 17 is fixed with the valve cover 9 through a stud bolt and a nut, and the baffle ring 12 is fixedly connected with the valve cover 9 through threads, so that the fixity and the detachability of the interconnection are guaranteed.
The working principle is as follows:
initial state of the valve: the floating ball 3 of the water hammer prevention air valve is positioned at the bottom of the filter screen protection cylinder 2, a guide rod is arranged outside the floating ball 3, so that the sealing surface of the floating ball is always upward, the floating ball 3 can move up and down without hindrance in the filter screen protection cylinder 2 under the action of upward force in the vertical direction, the buffer plate 11 is positioned on a step in the valve cover 9 due to self gravity, and an exhaust passage between the floating ball 3 and the cavity of the valve body 1 is in a maximum flow area state;
a high-speed exhaust state: when the pipeline is flushed with water and exhausted, high-speed airflow enters the valve body 1 through an inlet at the lower part of the valve body 1, enters the upper part of the valve body 1 along an annular flow surface between the valve body 1 and the floating ball 3, then enters the atmosphere through a hole of the valve cover 9, a hole of the buffer plate 11, a hole in the baffle ring 12, an overflow area between the insect-proof net 16 and the exhaust hood 17, a small part of airflow at the inlet of the valve body 1 enters the interior of the protective cylinder through an opening at the bottom of the protective cylinder 2 of the filter screen and moves upwards along a gap between the floating ball 3 and the protective cylinder 2 of the filter screen, but under the action of the gravity of the floating ball 3 and the transverse airflow of the window of the protective cylinder above the floating ball 3, the part of airflow cannot blow up the floating ball 3 to a sealing position;
a throttling exhaust state: when the exhaust speed continues to rise and the exhaust pressure difference is increased to a designed value (namely the shut-off water column moves faster in opposite directions, namely before closing is performed), the buffer plate 11 made of rubber is blown by airflow, contacts the baffle ring 12 and forms sealing, only the exhaust hole between the buffer plate 11 and the baffle ring 12 is left for exhaust, at the moment, the exhaust area is reduced, the exhaust amount of the water hammer exhaust valve is reduced, part of gas trapped in a pipeline is trapped to form a buffer air bag, the closing speed of the water column moving in opposite directions is reduced, the closing kinetic energy is eliminated, at the moment, the exhaust through the holes of the buffer plate 11 and the baffle ring 12 is still performed and is not closed, so the water hammer can not be closed by the exhaust valve, and the formed buffer air bag can still effectively reduce the shut-off water column closing energy in the pipeline;
valve closing and sealing state: when the gas in the pipeline is basically exhausted, the water level rises and enters the inner cavity of the valve body 1, the floating ball 3 floats upwards (is lighter than water) and contacts with the rubber sealing ring 8 on the valve cover 9 to form the sealing of the exhaust port, the specific sealing pressure of the sealing part is increased along with the rise of the water pressure in the valve body 1, the valve is closed, and water and gas cannot be exhausted through the valve;
a micro exhaust state: after the valve is closed, when gas is separated out from the pipeline, the gas is gradually gathered in the valve body 1 of the water hammer prevention air valve, when the gathered gas is increased and the gas pressure is increased to be greater than the pressure of water, the gas pressure keeps the sealing state of the exhaust port on one hand, on the other hand, the water level submerging the floating ball 3 is lowered, the floating ball 3 falls down to open the micro exhaust port of the micro exhaust assembly 19 and start micro exhaust, and as the micro exhaust is carried out, the gas pressure gathered at the position is reduced along with the decrease and the water level is increased, the floating ball 3 seals the valve seat of the micro exhaust assembly 19 along with the rise of the water level, so the micro exhaust valve seat can lead the gas to be exhausted through the micro exhaust assembly, but the water cannot be exhausted, the functions of exhausting the gas immediately after the exhaust, closing after the exhaust, exhausting at intervals, exhausting only without exhausting and;
when the pipeline is in a negative pressure state due to pump stop and drainage emptying, the water level is reduced, the external air pressure is greater than the water pressure of the pipeline, the floating ball 3 falls due to the reduction of the water pressure and the water level by the external air, the exhaust port is opened, and a large amount of external air can be immediately sucked to eliminate the vacuum of the pipeline.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a water hammer prevention air valve, includes valve body (1), valve gap (9), floater (3), filter screen protects a section of thick bamboo (2), buffer board (11), keeps off ring (12), fly net (16), exhaust hood (17), trace exhaust subassembly (19), blowdown subassembly (20) and washing subassembly (10), its characterized in that: the valve body (1) comprises a medium inlet, a medium outlet, a sewage draining outlet, a trace gas exhaust port and a valve cavity, wherein the axial direction of the medium inlet coincides with the axial direction of the medium outlet, the valve cavity is positioned between the medium inlet and the outlet, the drift diameter of the valve cavity is larger than that of the medium inlet, the drift diameter of the medium inlet is equal to that of the medium outlet, a buffer seat (21) is cast at the bottom of the valve cavity, the buffer seat (21) and the valve cavity are coaxial, a small hole is arranged in the middle of the buffer seat (21), a valve cover (9) and the medium inlet are coaxial, a filter screen protection cylinder (2) is arranged in the valve cavity of the valve body (1), the filter screen protection cylinder (2) and the valve body (1) are coaxial, an outlet flange of the valve body (1) is provided with a groove, the filter screen protection cylinder (2) is arranged on the groove at the outlet end of the valve body (1), and the filter screen protection, and circular dull and stereotyped height is less than valve body (1) medium export plane, and thickness equals valve body (1) recess, the filter screen protects a section of thick bamboo (2) highly to be higher than buffer base (21), fly net (16) and valve gap (9) are coaxial, fly net (16) are located between exhaust hood (17) and valve gap (9), exhaust hood (17) set up at fly net (16) top, buffer board (11) are placed on the step in valve gap (9), buffer board (11) and valve gap (9) are coaxial, be provided with the aperture in the middle of buffer board (11), fender ring (12) are located buffer board (11) top, fender ring (12) and buffer board (11) are coaxial, be provided with the aperture in the middle of fender ring (12).
2. The water hammer preventing air valve of claim 1, wherein: o-shaped rings (7) are arranged between the bottom of the valve cover (9) and the outlet of the valve body (1), and the number of the O-shaped rings (7) is one group.
3. The water hammer preventing air valve of claim 1, wherein: the bottom of the valve cover (9) is provided with an embedded groove for placing the rubber sealing ring (8).
4. The water hammer preventing air valve of claim 1, wherein: a spigot is arranged between the valve body (1) and the valve cover (9), a notch is arranged on the valve body (1), and a convex opening is arranged on the valve cover (9).
5. The water hammer preventing air valve of claim 1, wherein: the valve body (1) is connected with the valve cover (9) through a first bolt (4), a first nut (5) and a gasket (6).
6. The water hammer preventing air valve of claim 1, wherein: the inner and outer surfaces of the valve body (1) and the valve cover (9) are covered with epoxy resin coatings.
7. The water hammer preventing air valve of claim 1, wherein: the micro-exhaust assembly (19) is connected with the valve body (1) through conical threads, the sewage discharge assembly (20) is connected with the valve body (1) through conical threads, and the cleaning assembly (10) is connected with the valve body (1) through conical threads.
8. The water hammer preventing air valve of claim 1, wherein: the exhaust hood (17) is fixed with the valve cover (9) through a stud and a nut, and the baffle ring (12) is fixedly connected with the valve cover (9) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921411595.4U CN210510493U (en) | 2019-08-28 | 2019-08-28 | Water hammer-proof air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921411595.4U CN210510493U (en) | 2019-08-28 | 2019-08-28 | Water hammer-proof air valve |
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| Publication Number | Publication Date |
|---|---|
| CN210510493U true CN210510493U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921411595.4U Active CN210510493U (en) | 2019-08-28 | 2019-08-28 | Water hammer-proof air valve |
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| CN (1) | CN210510493U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648431A (en) * | 2020-12-31 | 2021-04-13 | 上海冠龙阀门节能设备股份有限公司 | Ultrahigh pressure exhaust valve |
-
2019
- 2019-08-28 CN CN201921411595.4U patent/CN210510493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648431A (en) * | 2020-12-31 | 2021-04-13 | 上海冠龙阀门节能设备股份有限公司 | Ultrahigh pressure exhaust valve |
| CN112648431B (en) * | 2020-12-31 | 2024-02-02 | 上海冠龙阀门节能设备股份有限公司 | Ultrahigh pressure exhaust valve |
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