CN213685499U - Composite exhaust valve with buffering waterproof hammer structure - Google Patents
Composite exhaust valve with buffering waterproof hammer structure Download PDFInfo
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- CN213685499U CN213685499U CN202022808228.7U CN202022808228U CN213685499U CN 213685499 U CN213685499 U CN 213685499U CN 202022808228 U CN202022808228 U CN 202022808228U CN 213685499 U CN213685499 U CN 213685499U
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Abstract
The utility model discloses a take compound discharge valve of waterproof hammer structure of buffering, this compound discharge valve have abandoned the conventional mode of installing in the valve body below, reducing rivers through the aperture, change and install the buffering valve body in the top of valve body to through the pressure that increases in the valve body, in order to prevent the production of water hammer. Specifically, when the flow rate of the pipeline medium is increased, the buffer plate in the buffer valve cavity senses the air flow rate to timely move upwards to close the buffer large valve port on the upper part of the buffer valve cavity, high-speed air can be discharged only through the throttling hole formed in the buffer plate, the air discharging speed of the pipeline is limited, the pressure in the valve body is increased, therefore, the speed of the medium flowing into the exhaust valve when the air is discharged to the greatest extent is limited, water flow slowly flows into the exhaust valve, and the water hammer generated when the medium impacts the floater at a high speed is prevented.
Description
Technical Field
The utility model relates to a discharge valve field especially relates to a take compound discharge valve of waterproof hammer structure of buffering.
Background
When the water pipe is started to fill water, if the water filling speed is too high, the air is exhausted, and the float of the exhaust valve instantaneously collides and blocks the valve port under the impact of high-speed water flow, so that a water filling hammer is formed. When the pipeline is cut off, water columns can be formed at the upper and lower streams of the turning point of the pipeline and are broken and then closed, when two streams of broken and closed water flow impact the exhaust valve, the float of the exhaust valve instantaneously impacts and blocks the valve port under the impact of high-speed water flow, and a closed water hammer can be formed. The water filling hammer and the closing hammer are pipelines which occur frequently and are difficult to control, and the damage to pipeline facilities is large, which is often the main cause of pipe explosion, and particularly the closing hammer.
The common exhaust valve is difficult to adapt, and a buffering plug valve is often required to be additionally arranged at the inlet end of the exhaust valve so as to reduce the water flow speed entering the exhaust valve.
The invention discloses a composite exhaust valve for preventing a water hammer, which is disclosed in Chinese patent application CN201910743969.0, wherein a valve clack is arranged at the bottom of a valve body, the impact of the water hammer on the valve clack is weakened by utilizing an arc-shaped valve clack, and a through hole capable of forming a correlation water column is arranged on the valve clack to weaken the water hammer. The Chinese utility model patent CN201620937538.X discloses a high-speed air inlet and outlet valve with a waterproof hammer device, wherein a waterproof hammer valve core with a through hole is also arranged at the bottom of a valve body, and when high-pressure fluid passes through the waterproof hammer valve core, effective pressure reduction is carried out through the through holes orderly arranged on the waterproof hammer valve core; the water hammer valve core and the buffer springs on the water hammer valve core slowly absorb the huge energy suddenly generated in the pipeline, thereby effectively preventing the generation of water hammer.
In the two schemes, the valve clack/valve core is soaked in water for a long time, the hole on the valve clack/valve core is easily blocked and loses efficacy due to the influence of water quality, the valve clack/valve core is not easy to clean thoroughly only in a back washing mode, frequent disassembly and maintenance are needed, parts such as a spring are easy to rust, the exhaust valve needs to be integrally disassembled during maintenance, the pipeline is stopped to be used, and the maintenance workload is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a water hammer that produces when can enough having prevented that the medium from assaulting the float at a high speed is provided, the compound discharge valve of the waterproof hammer structure of area buffering of being convenient for maintenance again.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
the utility model provides a take compound discharge valve of waterproof hammer structure of buffering, includes that valve body, cooperation are fixed in the valve gap at valve body top, and are fixed in the exhaust hood at valve gap top, are equipped with the sealing washer between valve body and valve gap, are equipped with the float of activity in the valve body inner chamber, and valve port department in the valve gap is equipped with the annular sealed pair that is used for with the contact of float top that rises, its characterized in that still includes:
the buffer valve body is fixed between the exhaust hood and the valve cover, the exhaust valve port is formed in the top of the buffer valve body, a sliding rod which vertically faces downwards and extends into the buffer valve body is fixed on the exhaust hood, a buffer plate is arranged on the sliding rod in a sliding mode and sleeved with a spring, a plurality of throttling holes are formed in the buffer plate, and the buffer plate rises along the sliding rod to compress the spring and can close the exhaust valve port.
The further technical scheme is that the throttle hole is a threaded hole.
The further technical scheme is that an arc-shaped bracket for supporting the floater is fixed in an inner cavity of the valve body, and a cushion block is arranged on the upper surface of the arc-shaped bracket.
The further technical scheme is that a guide sleeve is arranged at the bottom of the arc-shaped bracket, and a guide rod arranged in the guide sleeve is fixed at the bottom of the floater.
The technical scheme is that a notch is formed in the bottom of the guide sleeve, the guide rod is a conical rod with the small end facing downwards, and a circumferential gap is formed between the guide sleeve and the guide rod.
The technical scheme is that the sealing pair comprises a valve seat and a valve seat sealing ring tightly held on the outer wall of the valve seat, the lower end of the valve seat sealing ring protrudes out of the valve seat, an inner ring at the lower end of the valve seat sealing ring is provided with an inner hook-shaped wedge angle, and an outer ring at the lower end of the valve seat sealing ring is provided with an automatic compensation conical surface, so that an extruded space is reserved between the valve seat sealing ring and the inner wall of the valve cover.
The further technical scheme is that the floater is a hollow ball made of stainless steel, and the valve seat is made of copper.
The further technical scheme is that the inner cavity of the valve body is also connected with a bypass micro-exhaust system, and the bypass micro-exhaust system comprises a micro-exhaust valve and a drainage pipe opening with a valve.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the composite exhaust valve abandons the conventional mode of reducing water flow through small holes and arranged below the valve body, changes the mode of arranging the buffer valve body above the valve body and prevents the production of water hammer by increasing the pressure in the valve body. Specifically, when the flow rate of the pipeline medium is increased, the buffer plate in the buffer valve cavity senses the air flow rate to timely move upwards to close the buffer large valve port on the upper part of the buffer valve cavity, high-speed air can be discharged only through the throttling hole formed in the buffer plate, the air discharging speed of the pipeline is limited, the pressure in the valve body is increased, therefore, the speed of the medium flowing into the exhaust valve when the air is discharged to the greatest extent is limited, water flow slowly flows into the exhaust valve, and the water hammer generated when the medium impacts the floater at a high speed is prevented.
The composite exhaust valve slows down exhaust to increase the pressure in the valve cavity above the floater, thereby increasing the resistance of the floater to rise and preventing water hammer generated when a medium impacts the floater at high speed. The working principle is superior to a mode of reducing water flow through small holes, the blockage caused by impurities in water is avoided, the maintenance cost is low, the reliability is high, and the service life is long.
The buffering valve body is arranged above the valve body, so that the damage of parts caused by the fact that the buffering valve is soaked in a medium for a long time is avoided, and after the buffering valve body is used for a long time and needs to be maintained, the whole exhaust valve does not need to be detached from a pipeline, only the buffering part arranged on the valve cover and the exhaust hood assembly need to be detached together for maintenance, and at the moment, the floater in the cavity of the main valve still blocks the valve port, so that the use is not influenced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic cross-sectional view of the present compound exhaust valve;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, the composite exhaust valve with the buffering waterproof hammer structure comprises a valve body 1, a valve cover 2 fixed on the top of the valve body 1 in a matching manner, and an exhaust hood 3 fixed on the top of the valve cover 2, wherein a sealing ring is arranged between the valve body 1 and the valve cover 2, a movable floater 4 is arranged in an inner cavity of the valve body 1, and a circumferential sealing pair used for contacting with the top end of the ascending floater 4 is arranged at a valve port of the valve cover 2.
The compound exhaust valve also comprises a buffer valve body 5. The buffer valve body 5 is fixed between the exhaust hood 3 and the valve cover 2, the valve body 1, the valve cover 2, the buffer valve body 5 and the exhaust hood 3 can be connected into a whole from bottom to top through fasteners such as bolts, and a cavity for medium circulation is formed on the inner surface. The top of the buffer valve body 5 is provided with an exhaust valve port 51, a slide rod 52 which vertically extends downwards and into the buffer valve body 5 is fixed on the exhaust hood 3, the bottom of the slide rod 52 is provided with a limit position, and a buffer plate 53 is arranged on the slide rod 52 in a sliding manner and is sleeved with a spring 54. The weight of the buffer plate 53 is far less than that of the float 4, a plurality of throttle holes 531 are arranged on the buffer plate 53, the aperture of each throttle hole 531 is far less than that of the exhaust valve port 51, and the lower end surface of the buffer plate 53 is a conical surface so as to increase the lower surface area. When the damping plate 53 rises along the sliding rod 52, it compresses the spring 54 and can block the exhaust valve port 51 to close the exhaust valve port 51.
When the pipeline medium flow rate is low in the initial stage of starting the pump, the pipeline medium pushes pipeline air to enter the main valve cavity through the lower port of the exhaust valve, then enters the buffer valve cavity through the valve seat 61, and then is exhausted from the exhaust hood 3 through the exhaust valve port 51.
When the flow rate of the pipeline medium is increased, the pipeline air is pushed to rapidly flush into the valve cavity, at the moment, the buffer plate 53 in the buffer valve cavity senses the air flow rate, the buffer plate 53 is supported by the air flow and can timely go upwards to close the exhaust valve port 51 at the upper part of the buffer valve cavity, the high-speed air can only be exhausted through the throttling hole 531 formed in the buffer plate 53, the drainage speed of the pipeline air is limited, the pressure in the valve body 1 is increased, the speed of the medium flowing into the exhaust valve when the air is exhausted is limited, the water flow slowly flows into the exhaust valve, the floater 4 in the main valve cavity slowly and stably rises along with the water under the action of the water buoyancy force to block the valve seat 61, the valve seat is sealed with a sealing pair, meanwhile, the buffer plate 53 is reset under the action of the self weight and the reset force.
The conventional mode that the composite exhaust valve is installed below the valve body 1 and reduces water flow through the small holes is abandoned, the buffer valve body 5 is installed above the valve body 1, and the production of water hammer is prevented by increasing the pressure in the valve body 1.
The composite exhaust valve adopts slow exhaust to increase the pressure in the valve cavity above the floater 4, thereby increasing the resistance of the floater 4 to rise and preventing water hammer generated when a medium impacts the floater 4 at high speed. The working principle is superior to a mode of reducing water flow through small holes, the blockage caused by impurities in water is avoided, the maintenance cost is low, the reliability is high, and the service life is long.
The buffer valve body 5 is arranged above the valve body 1, so that the damage of parts caused by the long-time soaking of the buffer valve in a medium is avoided, and after long-term use, when the buffer valve body 5 needs to be maintained, the whole exhaust valve does not need to be detached from a pipeline, only the buffer part arranged on the valve cover 2 and the exhaust hood 3 assembly need to be detached together for maintenance, and at the moment, the float 4 in the main valve cavity still blocks the valve port, so that the use is not influenced.
The throttle hole 531 is a threaded hole, and partial throttle hole 531 can be blocked by bolts according to field conditions, so that the throttling amount can be adjusted.
The inner cavity of the valve body 1 is fixedly provided with the arc-shaped bracket 41 for supporting the floater 4, the arc-shaped bracket 41 is matched with the radian of the floater 4, the contact part of the arc-shaped bracket 41 and the floater 4 is set to be an upward concave arc surface, the streamline design can prevent the floater 4 from being blown up by original air in the valve in the exhaust stage of the valve, and further, the floater floats upwards in advance to form sealing with a sealing pair, an exhaust valve is closed, and the floater 4 is floated and blocked by water level lifting under abnormal conditions. Having a pad, preferably an elastic pad, on the upper surface of the arc-shaped bracket 41, it is possible to completely prevent the float 4 from directly contacting and colliding with the arc-shaped bracket 41, thereby protecting the float 4. In order to allow the medium to pass through, the arc bracket 41 has a gap between its edge and the inner wall of the valve body 1, and the arc bracket 41 also has a notch.
The bottom of the arc-shaped bracket 41 is provided with a guide sleeve 42, the bottom of the floater 4 is fixed with a guide rod 43 arranged in the guide sleeve 42, and the guide sleeve 42 is matched with the guide rod 43 to ensure that the floater 4 ascends and descends approximately vertically. The bottom of the guide sleeve 42 is provided with a notch, and the notch is used for discharging water in the guide sleeve 42 and enabling the guide rod 43 to fall back after no medium exists in the pipeline. The guide rod 43 is a tapered rod with a downward small end, an annular gap is formed between the guide sleeve 42 and the guide rod 43, the guide rod 43 and the guide sleeve 42 are ensured to be matched smoothly, and the guide rod plays a role in guiding and correcting.
As shown in fig. 2, the sealing pair includes a valve seat 61 and a valve seat sealing ring 62 clasped on the outer wall of the valve seat 61. Because the valve port is closed by the float 4 of the exhaust valve, the float 4 bears great pressure, the float 4 presses the valve seat 61 again, if the valve seat 61 is improperly designed in structure, or the material of the valve seat 61 is hard, the float 4 is crushed to deform, or the float 4 directly presses the rubber sealing ring, the sealing ring is over-pressed to accelerate rubber aging, or the rubber sealing ring is partially exposed in the air and corroded and aged by the air, all of which can cause the outward leakage of the valve and influence the service life of the valve.
In the composite exhaust valve, the lower end of the valve seat sealing ring 62 protrudes out of the valve seat 61, an inner ring at the lower end of the valve seat sealing ring 62 is provided with an inner hook-shaped wedge angle 621, an outer ring at the lower end of the valve seat sealing ring 62 is provided with an automatic compensation conical surface 622, so that an extruded space is reserved between the valve seat sealing ring 62 and the inner wall of the valve cover 2, and the lower end of the valve seat sealing ring 62 is extruded by the floater 4 and then is filled in the space and is contacted with the inner wall of. The float 4 is a hollow sphere made of stainless steel, and the valve seat 61 is made of copper.
When the floater 4 floats to the valve seat 61 along with the medium, the floater firstly contacts with a sharp lip edge of a valve seat sealing ring 62 (made of rubber), the lip edge is provided with an inner hook-shaped wedge angle which has a holding effect on the floating ball, the outer side surface of the lip edge is provided with an automatic compensation conical surface 622, when the floating ball continues to rise, the valve seat sealing ring 62 is pressed, the automatic compensation conical surface 622 can provide low-pressure sealing force for the floating ball, after the bottom of the valve seat sealing ring is extruded and deformed, the automatic compensation conical surface is attached to the inner wall of the valve cover, the valve cover support sealing ring is in close contact with the floater, and sealing of a main.
Along with the rising of pipeline pressure, the floater continues to rise, and valve seat sealing washer 62 is right after the pressurized formation soft sealing is vice, and the floater contacts copper valve seat 61 and forms hard sealing vice, and the floater receives water pressure and transmits to valve gap 2 through copper valve seat 61 this moment, and valve seat sealing washer 62 can not the excessive pressure ageing, simultaneously because valve seat 61 is the copper product, the floater is stainless steel product, and this hard sealing is vice can not make the outer sphere excessive pressure that the floater was sealed appear the indentation and influence sealing performance.
When the valve seat sealing ring works, the lip part of the valve seat sealing ring 62 with the sealing function is completely immersed in the medium and cannot be exposed in the air, the medium plays a role in lubricating and cooling the lip part of the sealing ring equivalently, the corrosion of high temperature and oxidation is prevented, and the service life of the sealing ring is prolonged. And valve seat sealing washer 62 inlays the disk seat 61 subassembly of embracing an organic whole with copper valve seat 61, can directly press in disk seat 61 hole, does not need the screw fastening, simple structure.
The inner cavity of the valve body 1 is further connected with a bypass micro-exhaust system 7, the bypass micro-exhaust system 7 comprises a micro-exhaust valve and a water discharge pipe opening with a valve, and preferably, the bypass micro-exhaust system 7 is connected in the valve cavity below the floater 4.
The above is only the preferred embodiment of the present invention, and any person can make some simple modifications, deformations and equivalent replacements according to the present invention, all fall into the protection scope of the present invention.
Claims (8)
1. The utility model provides a take compound discharge valve of waterproof hammer structure of buffering, includes valve body (1), the cooperation is fixed in valve gap (2) at valve body (1) top, and is fixed in exhaust hood (3) at valve gap (2) top, is equipped with the sealing washer between valve body (1) and valve gap (2), is equipped with float (4) of activity in valve body (1) inner chamber, is equipped with the annular sealed pair that is used for with float (4) top contact that rises in the valve port department of valve gap (2), its characterized in that still includes:
the buffer valve body (5) is fixed between the exhaust hood (3) and the valve cover (2), an exhaust valve port (51) is formed in the top of the buffer valve body (5), a vertical downward sliding rod (52) extending into the buffer valve body (5) is fixed on the exhaust hood (3), a buffer plate (53) is arranged on the sliding rod (52) in a sliding mode and is sleeved with a spring (54), a plurality of throttling holes (531) are formed in the buffer plate (53), and the buffer plate (53) rises along the sliding rod (52) to compress the spring (54) and can close the exhaust valve port (51).
2. The compound exhaust valve according to claim 1 characterized in that said throttle hole (531) is a threaded hole.
3. The compound exhaust valve according to claim 1 characterized in that an arc bracket (41) for supporting the float (4) is fixed to the inner cavity of the valve body (1), and a pad is provided on the upper surface of the arc bracket (41).
4. A composite exhaust valve according to claim 3, characterized in that the bottom of the arc-shaped bracket (41) is provided with a guide sleeve (42), and the bottom of the float (4) is fixed with a guide rod (43) placed in the guide sleeve (42).
5. The compound exhaust valve according to claim 4, characterized in that the bottom of the guide sleeve (42) is provided with a notch, the guide rod (43) is a conical rod with a downward small end, and a circumferential gap is formed between the guide sleeve (42) and the guide rod (43).
6. The compound exhaust valve according to claim 1, characterized in that the sealing pair comprises a valve seat (61) and a valve seat sealing ring (62) tightly held on the outer wall of the valve seat (61), the lower end of the valve seat sealing ring (62) protrudes out of the valve seat (61), an inner ring at the lower end of the valve seat sealing ring (62) is provided with an inner hook-shaped wedge angle (621), and an outer ring at the lower end of the valve seat sealing ring (62) is provided with an automatic compensation conical surface (622), so that a squeezed space is left between the valve seat sealing ring (62) and the inner wall of the valve cover (2).
7. Composite degassing valve according to claim 6, characterized in that the float (4) is a hollow sphere made of stainless steel material and the valve seat (61) is made of copper.
8. The compound exhaust valve according to claim 1, characterized in that a bypass micro-exhaust system (7) is further connected to the inner cavity of the valve body (1), and the bypass micro-exhaust system (7) comprises a micro-exhaust valve and a valved exhaust pipe orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022808228.7U CN213685499U (en) | 2020-11-27 | 2020-11-27 | Composite exhaust valve with buffering waterproof hammer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022808228.7U CN213685499U (en) | 2020-11-27 | 2020-11-27 | Composite exhaust valve with buffering waterproof hammer structure |
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| Publication Number | Publication Date |
|---|---|
| CN213685499U true CN213685499U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022808228.7U Active CN213685499U (en) | 2020-11-27 | 2020-11-27 | Composite exhaust valve with buffering waterproof hammer structure |
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| Country | Link |
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| CN (1) | CN213685499U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538369A (en) * | 2023-05-15 | 2023-08-04 | 江苏大学流体机械温岭研究院 | Waterproof hammer safety device with exhaust function |
| CN117128359A (en) * | 2023-10-25 | 2023-11-28 | 江苏特一机械股份有限公司 | Double-plate ball valve with bidirectional pressure monitoring function |
| CN118030859A (en) * | 2024-04-11 | 2024-05-14 | 天津市塘沽第一阀门有限公司 | Combined type air inlet and outlet valve |
-
2020
- 2020-11-27 CN CN202022808228.7U patent/CN213685499U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538369A (en) * | 2023-05-15 | 2023-08-04 | 江苏大学流体机械温岭研究院 | Waterproof hammer safety device with exhaust function |
| CN117128359A (en) * | 2023-10-25 | 2023-11-28 | 江苏特一机械股份有限公司 | Double-plate ball valve with bidirectional pressure monitoring function |
| CN117128359B (en) * | 2023-10-25 | 2024-01-12 | 江苏特一机械股份有限公司 | Double-plate ball valve with bidirectional pressure monitoring function |
| CN118030859A (en) * | 2024-04-11 | 2024-05-14 | 天津市塘沽第一阀门有限公司 | Combined type air inlet and outlet valve |
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