CN217653238U - High-pressure stop emptying valve - Google Patents

Abstract

The application relates to a high-pressure stop emptying valve which is applied to the field of valves and comprises a valve body, wherein a valve cavity is formed in the valve body, a water inlet and a water outlet are formed in the valve body, the water inlet is communicated with the valve cavity through a water inlet groove, the water outlet is communicated with the valve cavity through a water outlet groove, the water inlet and the water outlet are positioned on the same horizontal plane, the height of the communication position of the water inlet groove and the valve cavity is lower than that of the communication position of the water outlet groove and the valve cavity, a water stop groove is communicated between one end of the water inlet groove, which is back to the water inlet, and one end of the water outlet groove, which is back to the water outlet, and a valve seat is fixed on the wall of the water stop groove in a surrounding manner; the valve cavity is provided with a valve rod in a sliding mode, the top of the valve rod extends upwards to form a valve body along the vertical direction, the bottom of the valve rod is fixed with a water stop block, one end, back to the valve rod, of the water stop block is fixed with a valve clack, one end, back to the water stop block, of the valve clack is fixed with a plugging column, and the water stop block, the valve clack, the plugging column and the valve rod are arranged coaxially. This application has the sealed face's of protection valve clack and disk seat effect.

Description

High-pressure stop emptying valve

Technical Field

The application relates to the technical field of valves, in particular to a high-pressure stop emptying valve.

Background

The high-pressure stop emptying valve is a new type valve with throttling, stopping and emptying functions, and can be extensively used as closed-circuit device on the pipelines of petroleum, natural gas, coal gas, liquefied petroleum gas and oil refining, airport, chemical industry and oil gas storage and transportation, etc..

In the related technology, the high-pressure stop emptying valve adopts a pressure self-sealing structure, the valve clack is abutted against a boss of the valve seat to form a hard seal, meanwhile, a soft seal embedded on the valve clack is tightly pressed with the end face of the valve seat to form a second seal, and the valve clack is driven by the valve rod to leave the valve seat when the high-pressure stop emptying valve is opened.

Aiming at the related technologies, the inventor finds that the valve seat and the valve clack are positioned in the area with the sharply changed cross section of the flow passage, the conditions of flash evaporation and high scouring often occur, the sealing surface of the valve seat is easily eroded and damaged, and the sealing performance of the high-pressure stop blow-down valve can be reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that high-speed rivers destroy the sealed face of valve seat and lead to the sealing performance to reduce, this application provides a high pressure and ends emptying valve.

The application provides a high pressure is by emptying valve adopts following technical scheme:

a high-pressure stop emptying valve comprises a valve body, wherein a valve cavity is formed in the valve body, a water inlet and a water outlet are formed in the valve body, the water inlet is communicated with the valve cavity through a water inlet groove, the water outlet is communicated with the valve cavity through a water outlet groove, the water inlet and the water outlet are positioned on the same horizontal plane, the height of the communication position of the water inlet groove and the valve cavity is lower than that of the communication position of the water outlet groove and the valve cavity, a water stop groove is communicated between one end of the water inlet groove, which is back to the water inlet, and one end of the water outlet groove, which is back to the water outlet, and a valve seat is fixed on the wall of the water stop groove in a surrounding manner;

a valve rod is arranged in the valve cavity in a sliding mode, the top of the valve rod extends upwards out of the valve body along the vertical direction, a water stop block is fixed at the bottom of the valve rod, a valve clack is fixed at one end, back to the valve rod, of the water stop block, a plugging column is fixed at one end, back to the water stop block, of the valve clack, and the water stop block, the valve clack, the plugging column and the valve rod are arranged coaxially;

when the valve rod drives the blocking column to abut against the communication position of the water inlet groove and the valve cavity, the valve clack abuts against the valve seat, and the water stop block abuts against the communication position of the water outlet groove and the valve cavity.

By adopting the technical scheme, water enters the valve body from the water inlet and then flows out from the water outlet. When the high-pressure stop emptying valve is opened, the valve rod drives the water stop block, the valve clack and the plugging column to move upwards, the water inlet and the water outlet are communicated with the water outlet groove through the water inlet groove, and the flow velocity of water flow which enters the valve cavity and impacts the plugging column is reduced, so that the situation that the sealing surface of the valve seat is eroded and damaged due to overlarge flow velocity of the water flow can be reduced; when the high-pressure stop emptying valve is closed, the water stop block is plugged at the water outlet groove, and the plugging column is plugged at the water inlet groove to block water together with the valve clack and the valve seat, so that the sealing performance of the high-pressure stop emptying valve can be improved, and the possibility that the valve clack is damaged by continuous washing of water flow can be reduced.

Optionally, the diameter of the valve flap near one end of the water inlet groove is smaller than the diameter of the valve flap near one end of the water outlet groove, the diameter of the valve seat near one end of the water inlet groove is larger than the diameter of the valve seat near one end of the water outlet groove, and when the valve rod drives the plugging column to abut against the communicating part between the water inlet groove and the valve cavity, the valve flap is embedded into the valve seat.

Through adopting above-mentioned technical scheme, the shape of valve clack is the little round platform of bottom diameter and big top diameter, and the shape of disk seat then corresponds the shape setting of valve clack, and this makes the sealed face of disk seat for having domatic cascaded sealed face, compares in the sealed face of vertical formula, and the water impact can reduce the impact force of rivers to the sealed face of disk seat in the bottom of valve clack to reduce the sealed face of disk seat and receive the rivers erosion and the circumstances of damaging.

Optionally, a first water stop ring is fixed on the valve flap in a surrounding manner, a second water stop ring is fixed in the valve seat in a surrounding manner, and when the valve flap is embedded into the valve seat, the first water stop ring is attached to the second water stop ring.

By adopting the technical scheme, when the high-pressure stop emptying valve is closed, the valve clack is embedded into the valve seat, the first water stop ring and the second water stop ring are attached to each other, the first water stop ring and the second water stop ring are tightly abutted between the valve clack and the valve seat, the sealing performance of the valve clack and the valve seat can be improved, water flow impacts on the valve clack and then flows to the first water stop ring and the second water stop ring, and the possibility that the first water stop ring and the second water stop ring are damaged due to water flow impact can be reduced.

Optionally, a self-sealing cover is fixed in the valve cavity, the self-sealing cover is arranged on one side of the water stopping groove, which is opposite to the water outlet groove, and the self-sealing cover is sleeved on the valve rod;

when the plugging column abuts against the communication position of the water inlet groove and the valve cavity, a space is reserved between the water stop block and the self-sealing cover;

when the valve rod drives the water stop block to move towards the direction far away from the water inlet groove, the self-sealing cover is abutted between the water stop block and the valve cavity.

Through adopting above-mentioned technical scheme, when this high pressure is closed by emptying the valve, there is the interval between stagnant water piece and the self-sealing lid, and this makes through valve rod drive stagnant water piece back of moving up, has the interval between valve clack and the stagnant water groove, and the valve clack is raised and is washed the interval between the region with rivers promptly, and reducible valve clack is arranged rivers in and is washed the regional circumstances that receives the erosion and damage.

Optionally, the self sealss are covered and are overlapped and are equipped with sealing ring and clamping ring, the sealing ring supports tightly the valve body with between the self-sealing lid, the clamping ring supports tightly the valve body with between the sealing ring, just the clamping ring is arranged in the sealing ring dorsad one side of stagnant water groove.

Through adopting above-mentioned technical scheme, the sealing ring supports tightly between valve body and self-sealing lid, can reduce the possibility that the water oozes out between stagnant water piece and the self-sealing lid, promotes this high pressure and ends the sealing performance of atmospheric valve. The clamping ring is limited to the sealing ring, and the situation that the sealing ring slides on the self-sealing cover to cause water leakage is favorably reduced.

Optionally, an accommodating groove is formed in the sealing column along the length direction, the accommodating groove extends through the sealing column in a direction back to the valve clack, a pushing spring is fixed at the bottom of the accommodating groove, a speed reducer is fixed at one end of the pushing spring back to the valve clack, and the speed reducer is slidably arranged in the accommodating groove;

when the valve rod drives the plugging column to move upwards along the vertical direction, the speed reducing part extends out of the accommodating groove and is arranged in the water stop groove.

Through adopting above-mentioned technical scheme, when this high pressure is closed by the atmospheric valve, the gear reducer is accomodate in accomodating the inslot, when this high pressure is opened by the atmospheric valve, the shutoff post moves up, and the gear reducer then supports the tank bottom of pasting at the stagnant water groove all the time under the top of top push spring, and place in the intake chamber and keep away from the one end of water inlet, when rivers flow to the stagnant water groove by the intake chamber, the gear reducer forms the buffering to rivers, make the velocity of flow of rivers reduce, the too big condition that leads to the sealed face of disk seat to receive the erosion and damage of the velocity of flow of this reducible rivers.

Optionally, the speed reduction part includes the extension rod, the extension rod is fixed push up on the spring, just the extension rod with the axis coincidence of holding the groove, be fixed with a plurality of air brake on the extension rod, the air brake encircles and fixes on the outer wall of extension rod, the air brake is followed the length direction setting of extension rod.

Through adopting above-mentioned technical scheme, when rivers to the stagnant water groove, the speed reduction plate absorbs the partial impact of rivers, a plurality of speed reduction plates encircle the extension rod setting, and the speed reduction plate is all laid along the length direction of extension rod, this makes the speed reduction plate use the axis of extension rod to be radially laying as the center, this makes the speed reduction plate can carry out the absorption of certain degree to the rivers impact of arbitrary direction, thereby reduce the velocity of flow of rivers, be favorable to reducing the too big condition that leads to the sealed face of disk seat to receive the erosion and damage of the velocity of flow of rivers.

Optionally, a speed reducing net is arranged between the adjacent speed reducing plates, and the speed reducing net is fixed at one end, far away from the extension rod, of the speed reducing plate.

Through adopting above-mentioned technical scheme, the speed reduction net sets up between adjacent speed reduction board, and the speed reduction net encircles the gear reducer setting promptly, forms cage-like structure with the gear reducer, and the impact energy of speed reduction net absorbable water flow, this is favorable to promoting the speed reduction effect of gear reducer to rivers, and then reduces the condition that the velocity of flow is too big to lead to the sealed face of valve seat to receive the erosion and damage of rivers.

In summary, the present application includes at least one of the following beneficial technical effects:

1. water enters the valve body from the water inlet and then flows out from the water outlet. When the high-pressure cut-off emptying valve is opened, the valve rod drives the water stop block, the valve clack and the blocking column to move upwards, the water inlet and the water outlet are communicated with the water outlet groove through the water inlet groove, and the flow velocity of water flow which enters the valve cavity and impacts on the blocking column is reduced, so that the situation that the sealing surface of the valve seat is eroded and damaged due to overlarge flow velocity of the water flow can be reduced; when the high-pressure cut-off emptying valve is closed, the water stop block is blocked at the water outlet groove, and the blocking column is blocked at the water inlet groove and blocks water together with the valve clack and the valve seat, so that the sealing performance of the high-pressure cut-off emptying valve can be improved, and the possibility that the valve clack is damaged by continuous washing of water flow can be reduced;

2. the valve clack is a circular truncated cone with a small bottom diameter and a large top diameter, and the valve seat is arranged in a shape corresponding to that of the valve clack, so that the sealing surface of the valve seat is a stepped sealing surface with a slope, and compared with a vertical sealing surface, the impact force of water flow on the sealing surface of the valve seat can be reduced by the water impact on the bottom of the valve clack, and the damage of the sealing surface of the valve seat due to the water flow erosion is reduced;

3. when the high-pressure cut-off emptying valve is closed, a distance exists between the water stop block and the self-sealing cover, so that after the water stop block is driven by the valve rod to move upwards, a distance exists between the valve clack and the water stop groove, namely the valve clack is lifted and has a distance with a water flow scouring area, and the situation that the valve clack is damaged due to erosion when the valve clack is arranged in the water flow scouring area can be reduced.

Drawings

FIG. 1 is a schematic diagram of a high pressure stop vent valve in an embodiment of the present application.

Fig. 2 is an enlarged view of a portion a in the embodiment of the present application.

Fig. 3 is a schematic structural view of a speed reducer in the embodiment of the present application.

Reference numerals: 1. a valve body; 101. a valve cavity; 102. a water inlet; 103. a water outlet; 104. a water inlet tank; 105. a water outlet groove; 106. a water stopping tank; 2. a valve seat; 3. a valve stem; 4. a wheel handle; 5. a water stop block; 6. a valve flap; 7. plugging the column; 701. a receiving groove; 8. a first water stop ring; 9. a second water stop ring; 10. a self-sealing cover; 11. a seal ring; 12. pressing a ring; 13. pushing a spring; 14. a speed reduction member; 141. an extension rod; 142. a speed reduction plate; 15. a speed reducing net.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses high pressure stops atmospheric valve. Referring to fig. 1, a high-pressure stop emptying valve comprises a valve body 1, wherein a water inlet 102 and a water outlet 103 are formed in the valve body 1, a valve cavity 101 is formed in the valve body 1, the water inlet 102 is communicated with the valve cavity 101 through a water inlet groove 104, the water outlet 103 is communicated with the valve cavity 101 through a water outlet groove 105, and when the high-pressure stop emptying valve is opened, water flows into the valve cavity 101 through the water inlet 104 from the water inlet 102 and then flows out through the water outlet groove 105 from the water outlet 103. The heights of the water inlet 102 and the water outlet 103 are consistent, so that the situation that water is difficult to flow out and stays in the valve cavity 101 due to the height difference between the water inlet 102 and the water outlet 103 can be reduced.

The water inlet tank 104 is communicated with the water outlet tank 105 through the water stop tank 106, and the connection between the water inlet tank 104 and the water outlet tank 105 can be blocked by plugging the water stop tank 106, so that the high-pressure stop emptying valve is closed. The end of the inlet channel 104 remote from the inlet 102 is lower than the end of the outlet channel 105 remote from the outlet 103, which facilitates the flow of water into the outlet channel 105 out of the outlet 103, and also reduces the flow of water into the outlet channel 105 under the force of gravity when the water stop channel 106 is blocked to close the high pressure stop vent valve. The water stop groove 106 is communicated with the valve cavity 101, and the diameter of the water stop groove 106 is smaller than that of the valve cavity 101. A valve seat 2 is fixed on the inner wall of the valve cavity 101 at the water stop groove 106 in a surrounding manner, and the valve seat 2 is arranged at one end of the water stop groove 106 far away from the water inlet groove 104. The valve cavity 101 is provided with a valve rod 3 in a sliding manner, the valve rod 3 can be operated by a rotating wheel handle 4 to move up and down in the valve cavity 101 along the vertical direction, and the top of the valve rod 3 extends upwards to form the valve body 1 along the vertical direction. Referring to fig. 2, a water stop block 5 is fixed at the bottom of the valve rod 3, a valve flap 6 is fixed at one side of the water stop block 5, which is back to the valve rod 3, and a plugging column 7 is fixed at one side of the valve flap 6, which is back to the water stop block 5.

Referring to fig. 1 and 2, when the high-pressure stop emptying valve is closed, the valve rod 3 moves downward along the length direction of the valve body 1, and drives the water stop block 5, the valve flap 6 and the blocking column 7 to move downward along the length direction of the valve body 1, at this time, the water stop block 5 abuts against one end of the water outlet tank 105 far away from the water outlet 103, the valve flap 6 is attached to the valve seat 2, and the blocking column 7 abuts against one end of the water inlet tank 104 far away from the water inlet 102, so that three blocks of water flow are formed in the water stop tank 106, compared with the case that water is blocked only by the valve flap 6 and the valve seat 2, the sealing performance of the high-pressure stop emptying valve can be improved, and the structure disperses the impact force of the water flow on the valve seat 2 and the valve flap 6, and is beneficial to forming protection on the valve seat 2, and reducing the damage of the sealing surface of the valve seat 2 due to erosion of the water flow.

Referring to fig. 2, valve clack 6 is the round platform shape, and is concrete, and valve clack 6 is by the one end of keeping away from valve rod 3 towards the one end diameter that is close to valve rod 3 crescent, and valve seat 2 then corresponds valve clack 6 setting, and valve seat 2 is the annular, and valve clack 6's diameter is by the one end of keeping away from valve rod 3 towards the one end crescent that is close to valve rod 3, and this makes the sealed face of valve seat 2 have the radian, can form the guide to the impact force of rivers and unload the power. When valve clack 6 supports and pastes on disk seat 2, the one end of valve clack 6 stagnant water piece 5 dorsad stretches into in the stagnant water groove 106, valve clack 6 embedding disk seat 2 promptly, and this makes valve clack 6 and disk seat 2 can closely laminate, and cascaded disk seat 2 sealed face can avoid the region of flash distillation and runner cross-section sudden change when rivers erode to avoid strong washing area, and then reduce the disk seat 2 sealed face and receive the impact and damage and lead to this high pressure to end the possibility of emptying valve seepage.

And the valve clack 6 is sleeved with a first water stop ring 8, the first water stop ring 8 is fixed on the cambered surface of the valve clack 6 in a surrounding manner, and a second water stop ring 9 is fixed in the valve seat 2 in a surrounding manner. When valve clack 6 embedding disk seat 2 in, first seal ring 8 supports tightly with second seal ring 9, and first seal ring 8 and second seal ring 9 are made by rubber, consequently have elasticity, when rivers entered this high pressure and end the blow-off valve and produce vibrations, first seal ring 8 and second seal ring 9 can produce certain elastic deformation and support tightly all the time and seal between valve clack 6 and disk seat 2, and this can promote this high pressure and end the leakproofness of blow-off valve.

Referring to fig. 1 and 2, a self-sealing cover 10 is sleeved on a valve rod 3, the self-sealing cover 10 is fixed in a valve cavity 101, the cross section of the self-sealing cover 10 is circular, the outer wall of the valve rod 3 is attached to the inner wall of the self-sealing cover 10, the valve rod 3 can slide in the self-sealing cover 10 along the length direction of a valve body 1, and the diameter of the valve rod 3 is smaller than that of a water stop block 5, namely the water stop block 5 cannot slide into the self-sealing cover 10. On one hand, the self-sealing cover 10 limits the valve rod 3, so that the valve rod 3 can only slide up and down along the length direction of the valve body 1, and the situation that the sealing performance of the high-pressure stop emptying valve is influenced by deviation generated when the water stop block 5, the valve clack 6 and the sealing block slide is favorably reduced; on the other hand, when the high-pressure cut-off emptying valve is opened, the valve rod 3 slides upwards along the length direction of the valve body 1, and then the water stop block 5 abuts against the self-sealing cover 10, so that the condition that the high-pressure cut-off emptying valve fails due to the fact that the valve rod 3 slides out of the valve body 1 can be reduced, and the possibility that water flows out from the space between the self-sealing cover 10 and the valve rod 3 can be reduced.

In order to reduce the situation that water flows out from the position between the self-sealing cover 10 and the valve rod 3, the self-sealing cover 10 is sleeved with a sealing ring 11 and a pressing ring 12, wherein the sealing ring 11 is tightly propped between the valve body 1 and the self-sealing cover 10 to block leaked water, the pressing ring 12 is tightly propped between the valve body 1 and the sealing ring 11, and the pressing ring 12 is arranged on one side, back to the water stop groove 106, of the sealing ring 11, namely the pressing ring 12 presses the sealing ring 11 on the valve body 1 to reduce the situation that the sealing ring 11 is loosened and fails.

Referring to fig. 2 and 3, when the high-pressure stop and release valve is opened, the valve flap 6 is lifted away from a high-speed flushing area of water flow, which can reduce the damage of the valve flap 6 caused by the erosion of the water flow, and the blocking column 7 moves to a position between the valve seats 2, water flows into the water stop groove 106 along the water inlet groove 104 and then impacts on the blocking column 7, and the blocking column 7 decelerates the water flow, so that the damage of the valve seat 2 caused by the erosion of the water flow is reduced.

The plugging column 7 is provided with a containing groove 701 along the length direction, the containing groove 701 penetrates through the end face, back to the valve rod 3, of the plugging column 7, and the central axis of the containing groove 701 coincides with the central axis of the plugging column 7. The reduction part 14 is arranged in the accommodating groove 701 in a sliding mode, the pushing spring 13 is connected between the reduction part 14 and the bottom of the accommodating groove 701, when the valve clack 6 is embedded in the valve seat 2, the pushing spring 13 contracts, the reduction part 14 is accommodated in the accommodating groove 701, when the high-pressure cut-off emptying valve is opened, the blocking column 7 moves towards the direction of the self-sealing cover 10, the reduction part 14 is always arranged at one end, away from the water inlet 102, of the water inlet groove 104 under the pushing action of the pushing spring 13, water flows into the reduction part 14 and then impacts the reduction part 14, and the reduction part 14 absorbs impact energy of water flow, so that the flow rate of the water is reduced, and a sealing surface of the valve seat 2 is protected.

Referring to fig. 3, the decelerating element 14 includes an extension rod 141 and a plurality of decelerating plates 142, wherein the extension rod 141 is fixed at an end of the pushing spring 13 far away from the bottom of the accommodating groove 701, a central axis of the extension rod 141 coincides with the central axis of the accommodating groove 701, and an end of the extension rod 141 far away from the extension rod 141 abuts against the bottom of the water stopping groove 106. The speed reduction plate 142 is arranged along the length direction of the extension rod 141, the speed reduction plate 142 is vertically fixed on the outer wall of the extension rod 141, and the plurality of speed reduction plates 142 are uniformly distributed on the extension rod 141, so that the plurality of speed reduction plates 142 are radially fixed on the extension rod 141 by taking the central axis of the extension rod 141 as the center. When water is impacted after flowing into the water inlet tank 104, the speed reduction plates 142 absorb the impact energy of the water flow, so that the flow velocity of the water flow is reduced, and then the water flows upwards from the space between the adjacent speed reduction plates 142 along the length direction of the water stop tank 106.

The cover is equipped with the reduction mesh 15 on the gear reducer 14, and is concrete, all is equipped with the reduction mesh 15 between the adjacent retarder 142, and the one end that the extension rod 141 was kept away from at the reduction mesh 15 is fixed to the reduction mesh 15, and the length of reduction mesh 15 is the same with the length of retarder 142, and this makes up the structure with the formation "cage" of gear reducer 14 for the reduction mesh 15, can help slowing down the velocity of flow to the further absorption of impact energy of rivers to the velocity of flow of rivers, thereby forms the protection to disk seat 2 and valve clack 6.

The implementation principle of the high-pressure stop emptying valve in the embodiment of the application is as follows: when the high-pressure cut-off emptying valve is closed, the sealing block abuts against the water inlet groove 104, the valve clack 6 abuts against the valve seat 2, and the water stop block 5 abuts against the water outlet groove 105 to jointly form sealing to stop water flow; when the high-pressure stop emptying valve is opened, the valve rod 3 drives the water stop block 5, the valve clack 6 and the sealing block to move upwards, the water stop block 5 is attached to the self-sealing cover 10, the valve clack 6 is lifted to be away from a water flow impact area in the water stop groove 106, the pushing spring 13 supports the speed reducer 14 to be placed at the communication position of the water inlet groove 104 and the water stop groove 106, water flows into the water stop groove 106 from the water inlet groove 104 and then impacts the speed reducer plate 142 and the speed reducer net 15, and water flows into the water outlet groove 105 along the water stop groove 106 after being decelerated.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a high pressure is by emptying valve, includes valve body (1), has valve chamber (101) in valve body (1), has seted up water inlet (102) and delivery port (103) on valve body (1), and water inlet (102) are linked together through intake chamber (104) and valve chamber (101), and delivery port (103) are linked together its characterized in that through play basin (105) and valve chamber (101): the water inlet (102) and the water outlet (103) are positioned on the same horizontal plane, the height of the communication position of the water inlet groove (104) and the valve cavity (101) is lower than that of the communication position of the water outlet groove (105) and the valve cavity (101), a water stop groove (106) is communicated between one end of the water inlet groove (104) facing away from the water inlet (102) and one end of the water outlet groove (105) facing away from the water outlet (103), and a valve seat (2) is fixed on the wall of the water stop groove (106) in a surrounding manner;

a valve rod (3) is arranged in the valve cavity (101) in a sliding mode, the top of the valve rod (3) extends upwards to form the valve body (1) along the vertical direction, a water stop block (5) is fixed at the bottom of the valve rod (3), a valve clack (6) is fixed at one end, back to the valve rod (3), of the water stop block (5), a plugging column (7) is fixed at one end, back to the water stop block (5), of the valve clack (6), and the water stop block (5), the valve clack (6), the plugging column (7) and the valve rod (3) are arranged coaxially;

when the valve rod (3) drives the plugging column (7) to abut against the communication position of the water inlet groove (104) and the valve cavity (101), the valve clack (6) abuts against the valve seat (2), and the water stop block (5) abuts against the communication position of the water outlet groove (105) and the valve cavity (101).

2. A high pressure stop vent valve as defined in claim 1, wherein: valve clack (6) are close to the diameter of intake antrum (104) one end is less than valve clack (6) are close to go out the diameter of basin (105) one end, valve seat (2) are close to the diameter of intake antrum (104) one end is greater than valve seat (2) are close to go out the diameter of basin (105) one end, work as valve rod (3) drive shutoff post (7) are supported and are pasted intake antrum (104) with during the intercommunication department of valve pocket (101), valve clack (6) embedding in valve seat (2).

3. A high pressure stop vent valve as defined in claim 2, wherein: first stagnant water ring (8) are fixed around on valve flap (6), valve seat (2) interior encirclement is fixed with second stagnant water ring (9), works as valve flap (6) embedding when valve seat (2), first stagnant water ring (8) with second stagnant water ring (9) are laminated mutually.

4. A high pressure stop vent valve as defined in claim 1 wherein: a self-sealing cover (10) is fixed in the valve cavity (101), the self-sealing cover (10) is arranged on one side, back to the water outlet groove (105), of the water stop groove (106), and the self-sealing cover (10) is sleeved on the valve rod (3);

when the plugging column (7) abuts against the communication position of the water inlet groove (104) and the valve cavity (101), a space exists between the water stop block (5) and the self-sealing cover (10);

when the valve rod (3) drives the water stop block (5) to move towards the direction far away from the water inlet groove (104), the self-sealing cover (10) is abutted between the water stop block (5) and the valve cavity (101).

5. A high pressure stop vent valve as defined in claim 4 wherein: from sealed lid (10) go up the cover and be equipped with sealing ring (11) and clamping ring (12), sealing ring (11) support tightly valve body (1) with between self-sealing lid (10), clamping ring (12) support tightly valve body (1) with between sealing ring (11), just clamping ring (12) are arranged in sealing ring (11) dorsad one side of stagnant water groove (106).

6. A high pressure stop vent valve as defined in claim 1, wherein: a containing groove (701) is formed in the blocking column (7) along the length direction, the containing groove (701) extends through the blocking column (7) in the direction back to the valve clack (6), a pushing spring (13) is fixed at the bottom of the containing groove (701), a speed reducer (14) is fixed at one end, back to the valve clack (6), of the pushing spring (13), and the speed reducer (14) is arranged in the containing groove (701) in a sliding mode;

when the valve rod (3) drives the plugging column (7) to move upwards along the vertical direction, the speed reducer (14) extends out of the accommodating groove (701) and is placed in the water stop groove (106).

7. A high pressure stop vent valve as defined in claim 6, wherein: reduction member (14) are including extension rod (141), extension rod (141) are fixed push up on spring (13), just extension rod (141) with the axis coincidence of accomodating groove (701), be fixed with a plurality of air brake (142) on extension rod (141), air brake (142) encircle to be fixed on the outer wall of extension rod (141), air brake (142) are followed the length direction setting of extension rod (141).

8. A high pressure stop vent valve as defined in claim 7 wherein: it is adjacent be equipped with speed reduction net (15) between speed reduction board (142), speed reduction net (15) are fixed speed reduction board (142) are kept away from the one end of extension rod (141).

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