CN213685498U - Exhaust valve reliable in sealing - Google Patents
Exhaust valve reliable in sealing Download PDFInfo
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- CN213685498U CN213685498U CN202022801347.XU CN202022801347U CN213685498U CN 213685498 U CN213685498 U CN 213685498U CN 202022801347 U CN202022801347 U CN 202022801347U CN 213685498 U CN213685498 U CN 213685498U
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- valve seat
- sealing
- floater
- sealing ring
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Abstract
The utility model discloses a reliable sealed exhaust valve, wherein a valve port of a valve cover is provided with a circumferential sealing pair which is used for contacting with the top end of a rising floater, and the sealing pair comprises a valve seat and a valve seat sealing ring; the valve seat is embedded in the valve cover, is made of copper, and is provided with a sealing conical surface which is in contact with and sealed with the floater, and the floater is a hollow ball made of stainless steel; the valve seat sealing ring is 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, 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, and the lower end of the valve seat sealing ring is extruded by a floater and then is.
Description
Technical Field
The utility model relates to a discharge valve field especially relates to a reliable sealed discharge valve.
Background
The domestic exhaust valve is basically designed according to CJ/T217 composite high-speed intake and exhaust valve of water supply pipeline, the low-pressure water seal specified in the valve body seal standard is 0.02MPa, the pressure is kept for 1min, no visible leakage exists, the low-pressure seal pressure is not more than 0.02MPa, and the leakage caused by the large amount of water gushing out at low pressure is prevented, and most exhaust valves are difficult to achieve stably.
The float of the exhaust valve closes the valve port, the float bears great pressure, the float presses on the valve seat, if the valve seat structure is improperly designed, or the float is damaged due to the hard material of the valve seat, or the float directly presses on the rubber sealing ring, the rubber aging is accelerated due to the overpressure of the sealing ring, or the rubber sealing ring is aged due to the corrosion of air when being partially exposed in the air, all of the problems can cause the leakage of the valve, and the service life of the valve is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a reliable sealed discharge valve is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
the utility model provides a reliable sealed discharge valve, 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, are equipped with the annular sealed pair that is used for with the contact of the float top that rises in the valve port department of valve gap, its characterized in that: the sealing pair comprises a valve seat and a valve seat sealing ring; the valve seat is embedded in the valve cover, is made of copper and is provided with a sealing conical surface which is in contact sealing with the floater, and the floater is a hollow ball made of stainless steel; the valve seat sealing ring is 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, 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, and the lower end of the valve seat sealing ring is filled in the space and is in contact with.
The further technical scheme is as follows: an arc-shaped bracket for supporting the floater is fixed in the 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 further technical scheme is as follows: the top of valve gap inner chamber is equipped with seal assembly, seal assembly includes:
the upper fixed plate is horizontally fixed in the inner cavity of the valve cover, and a first notch part is formed in the upper fixed plate;
the lower floating plate is horizontally positioned below the upper fixed plate, is connected with the inner cavity of the valve cover in a vertically sliding manner, and is provided with a second notch part staggered with the first notch part;
the permanent magnet sheet I is fixed on the lower surface of the lower floating plate; and
the second permanent magnet sheet is fixed at the top of the floater and has the same magnetic field as the first permanent magnet sheet;
the second permanent magnet sheet and the first permanent magnet sheet keep a set distance under the action of magnetic field repulsion force, so that the lower floating plate moves upwards to be attached to the upper fixed plate after the floater rises and is sealed by the sealing pair.
The further technical scheme is as follows: the sealing assembly also comprises a sealing gasket which is fixed on the edge of the bottom surface of the upper fixed plate or the edge of the upper surface of the lower floating plate.
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:
when the floater floats to the valve seat along with a medium, the floater firstly contacts with a sharp lip edge of the valve seat sealing ring, 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, when the floating ball continuously rises, the valve seat sealing ring is pressed, the automatic compensation conical surface 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 supports the sealing ring to be in close contact with the floater, and low-pressure sealing.
The floating ball continues to rise along with the rise of the pressure of the pipeline, after the valve seat sealing ring is properly pressed to form a soft sealing pair, the floating ball contacts the copper valve seat to form a hard sealing pair, at the moment, the floating ball is subjected to water pressure and is transmitted to the valve cover through the copper valve seat, the valve seat sealing ring cannot be subjected to overpressure aging, and meanwhile, the valve seat is made of copper materials, the floating ball is made of stainless steel materials, and the hard sealing pair cannot enable the outer spherical surface sealed by the floating ball to be subjected to overpressure so as to affect the.
The lip part that the during operation disk seat sealing washer plays the sealed effect is whole to be soaked in the medium, can not expose in the air, and the medium plays lubricated and cooling effect in other words to the sealing washer lip, prevents the erosion of high temperature, oxidation, has prolonged the sealing washer life-span. And the valve seat sealing ring and the copper valve seat are embedded and embraced into an integrated valve seat assembly, so that the valve seat assembly can be directly pressed into a valve seat hole without being fastened by screws, and the structure is simple.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of a vent valve of the present disclosure;
fig. 2 is a partial structural schematic view of a seal pair of the present disclosure.
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 and 2, a reliable sealing exhaust valve includes 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 float 4 is arranged in an inner cavity of the valve body 1, and a circumferential sealing pair for contacting with the top end of the raised float 4 is arranged at a valve port of the valve cover 2.
Wherein, the sealing pair comprises a valve seat 5 and a valve seat sealing ring 6. The valve seat 5 is embedded in the valve cover 2, is made of copper, and is provided with a sealing conical surface 51 which is in contact with and sealed with the floater 4, and the floater 4 is a hollow ball made of stainless steel; the valve seat sealing ring 6 is tightly held on the outer wall of the valve seat 5, the lower end of the valve seat sealing ring protrudes out of the valve seat 5, an inner hook-shaped wedge angle 61 is arranged on an inner ring at the lower end of the valve seat sealing ring 6, an automatic compensation conical surface 62 is arranged on an outer ring at the lower end of the valve seat sealing ring 6, so that an extruded space is reserved between the valve seat sealing ring 6 and the inner wall of the valve cover 2, and the lower end of the valve seat sealing ring 6 is extruded by the floater 4 and then is filled in.
When the pipeline starts the pump in the initial stage, the flow rate of the pipeline medium is low, the pipeline medium pushes the pipeline air to enter the main valve cavity through the lower opening of the exhaust valve, and then the pipeline air is exhausted from the exhaust cover 3 through the valve port.
When the floater 4 floats to the valve seat 5 along with a medium, the floater 4 firstly contacts with a sharp lip edge made of rubber of a valve seat sealing ring 6, 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 62, when the floating ball continuously rises, the valve seat sealing ring 6 is pressed, the automatic compensation conical surface 62 can provide a floating ball low-pressure sealing force, after the bottom of the valve seat sealing ring 6 is extruded and deformed, the automatic compensation conical surface 62 is attached to the inner wall of the valve cover 2, the valve cover 2 supports the sealing ring to be in close contact with the floater 4, and low-pressure sealing.
Along with the pipeline pressure rising, the floater continues to rise, and valve seat sealing washer 6 is after the suitable pressurized formation soft sealing is vice, and the floater contacts copper valve seat 5 and forms hard sealing vice, and the floater receives water pressure and transmits to valve gap 2 via copper valve seat 5 this moment, and valve seat sealing washer 6 can not the excessive pressure ageing, simultaneously because valve seat 5 is the copper product, and the floater is stainless steel product, and this hard sealing is vice can not make the sealed ectosphere of floater excessive pressure appear the indentation and influence sealing performance.
When the valve seat sealing ring works, the lip part of the valve seat sealing ring 6 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 the valve seat seal ring 6 and the copper valve seat 5 are embedded and encircled into an integrated valve seat 5 assembly, and can be directly pressed into a hole of the valve seat 5 without being fastened by screws, so that the structure is simple.
The inner cavity of the valve body 1 is fixedly provided with an arc-shaped bracket 41 used 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 rod 43 is not separated from the guide sleeve 42 at all times, so that the floater 4 can be ensured to ascend and descend 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.
In order to further ensure the sealing performance of the exhaust valve, a sealing assembly is arranged at the top of the inner cavity of the valve cover 2 and is positioned above the valve seat 5, and the sealing assembly comprises an upper fixed plate 71, a lower floating plate 72, a first permanent magnet piece 73 and a second permanent magnet piece 74.
The upper fixed plate 71 is horizontally fixed in the inner cavity of the bonnet 2, and a first gap part is arranged on the upper fixed plate 71. The lower floating plate 72 is horizontally positioned below the upper fixed plate 71 and is connected to the inner cavity of the valve cap 2 in a vertically sliding manner, specifically, the inner wall of the valve cap 2 is subjected to outward expansion processing to form a sliding groove, and the edge of the lower floating plate 72 is arranged in the sliding groove to form a concave-convex matching mode. The lower floating plate 72 is provided with a second notch part staggered with the first notch part, and gas can be discharged through the second notch part and the first notch part during normal exhaust. The first permanent magnet piece 73 is fixed on the lower surface of the lower floating plate 72, and the second permanent magnet piece 74 is fixed on the top of the floater 4 and has the same magnetic field as the first permanent magnet piece 73. The first permanent magnet piece 73 and the second permanent magnet piece 74 both adopt neodymium iron boron permanent magnets, and magnetism is not influenced in a water body.
The second permanent magnet piece 74 and the first permanent magnet piece 73 keep a set distance under the action of magnetic field repulsion force, so that after the floater 4 ascends and is sealed by the sealing pair, the floating plate 72 moves upwards along with the floating plate under the action of the magnetic field repulsion force to be tightly attached to the upper fixed plate 71, and the first gap part and the second gap part are closed to form another sealing structure.
In addition, the sealing assembly further comprises a sealing gasket which is fixed on the bottom edge of the upper fixed plate 71 or the upper edge of the lower floating plate 72, so that the sealing performance of the sealing assembly is further ensured.
The inner cavity of the valve body 1 is further connected with a bypass micro-exhaust system 8, the bypass micro-exhaust system 8 comprises a micro-exhaust valve and a water discharge pipe opening with a valve, and preferably, the bypass micro-exhaust system 8 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 (6)
1. The utility model provides a reliable sealed discharge valve, 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: the sealing pair comprises a valve seat (5) and a valve seat sealing ring (6); the valve seat (5) is embedded in the valve cover (2), is made of copper, and is provided with a sealing conical surface (51) which is in contact sealing with the floater (4), and the floater (4) is a hollow ball made of stainless steel; valve seat sealing washer (6) hug closely in the outer wall of disk seat (5), and its lower extreme protrusion is in disk seat (5), has interior hook shape wedge angle (61) in the inner circle of valve seat sealing washer (6) lower extreme, has automatic compensation conical surface (62) in the outer lane of valve seat sealing washer (6) lower extreme for leave between valve seat sealing washer (6) and valve gap (2) inner wall by extruded space, valve seat sealing washer (6) lower extreme is filled in the space and with valve gap (2) inner wall contact after being extruded by float (4).
2. The discharge valve according to claim 1, wherein: an arc-shaped bracket (41) for supporting the floater (4) is fixed in an inner cavity of the valve body (1), and a cushion block is arranged on the upper surface of the arc-shaped bracket (41).
3. An air vent valve according to claim 2, wherein the bottom of the arc-shaped bracket (41) is provided with a guide sleeve (42), and a guide rod (43) arranged in the guide sleeve (42) is fixed at the bottom of the float (4).
4. The discharge valve according to claim 3, wherein: the top of valve gap (2) inner chamber is equipped with seal assembly, seal assembly includes:
the upper fixed plate (71) is horizontally fixed in the inner cavity of the valve cover (2), and a first gap part is formed in the upper fixed plate (71);
the lower floating plate (72) is horizontally positioned below the upper fixed plate (71) and is connected with the inner cavity of the valve cover (2) in a vertically sliding manner, and a second gap part staggered with the first gap part is formed in the lower floating plate (72);
the first permanent magnet sheet (73) is fixed on the lower surface of the lower floating plate (72); and
the second permanent magnet piece (74) is fixed at the top of the floater (4) and has the same magnetic field as the first permanent magnet piece (73);
the second permanent magnet sheet (74) and the first permanent magnet sheet (73) keep a set distance under the action of magnetic field repulsion, so that the lower floating plate (72) moves upwards to be attached to the upper fixed plate (71) after the floater (4) rises to be sealed with the sealing pair.
5. The discharge valve according to claim 4, wherein: the sealing assembly also comprises a sealing gasket which is fixed on the edge of the bottom surface of the upper fixed plate (71) or the edge of the upper surface of the lower floating plate (72).
6. The exhaust valve according to claim 1, characterized in that a bypass micro-exhaust system (8) is further connected to the inner cavity of the valve body (1), and the bypass micro-exhaust system (8) comprises a micro-exhaust valve and a drain pipe orifice with a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022801347.XU CN213685498U (en) | 2020-11-27 | 2020-11-27 | Exhaust valve reliable in sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022801347.XU CN213685498U (en) | 2020-11-27 | 2020-11-27 | Exhaust valve reliable in sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213685498U true CN213685498U (en) | 2021-07-13 |
Family
ID=76736504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022801347.XU Active CN213685498U (en) | 2020-11-27 | 2020-11-27 | Exhaust valve reliable in sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213685498U (en) |
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2020
- 2020-11-27 CN CN202022801347.XU patent/CN213685498U/en active Active
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