CN203963206U - Can reduce the Pneumatic gate valve of valve closing pressure - Google Patents
Can reduce the Pneumatic gate valve of valve closing pressure Download PDFInfo
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- CN203963206U CN203963206U CN201420408557.4U CN201420408557U CN203963206U CN 203963206 U CN203963206 U CN 203963206U CN 201420408557 U CN201420408557 U CN 201420408557U CN 203963206 U CN203963206 U CN 203963206U
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- decompression
- piston
- valve closing
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Abstract
The utility model relates to a kind of gate valve, particularly a kind of Pneumatic gate valve that reduces valve closing pressure.Concrete technological scheme is: a kind of Pneumatic gate valve that reduces valve closing pressure, include valve body, valve gap, valve seat, valve rod, flashboard and Pneumatic actuator, Pneumatic actuator includes air pump, cylinder and solenoid valve, in cylinder, be provided with and can be subject to air pump to drive the piston moving along cylinder axial reciprocating, piston and valve rod are connected, between cylinder and air pump, be provided with the valve closing mechanism of decompressor, the valve closing mechanism of decompressor includes decompression cylinder and the decompression piston that diameter is less than cylinder, in cylinder, include valve opening actuator chamber and valve closing actuator chamber, the upper cavity conducting of the space of decompression piston bottom and piston, in upper cavity in cylinder, offer the equalizing orifice with the outside conducting of cylinder.Adopt technique scheme, the Pneumatic gate valve of a kind of anti-wear, leakage, distortion, stable reduced valve closing pressure is provided.
Description
Technical field
The utility model relates to a kind of gate valve, particularly a kind of Pneumatic gate valve that reduces valve closing pressure.
Background technique
Gate valve is a kind ofly by flashboard, to be realized and closed or open, thus the valve of cut-off pipeline medium.The gate valve that adopts pneumatic mode to control need be installed cylinder conventionally on the valve body of gate valve, in cylinder, be provided with the piston that can move along cylinder inner cavity axial reciprocating, the valve rod of piston and valve body is connected, Pneumatic actuator be generally for export the air pump of source of the gas and be located at air pump and cylinder between solenoid valve, the flashboard of gate valve is implemented lifting by piston actuated valve rod in valve body, with this, forms the unlatching of gate valve or closes, yet, gate valve opening force is different from the power of closing, especially for Wedge gate valve, what the power of closing will arrange conventionally is smaller, as long as can guarantee the sealing of flashboard sealing surface, if the power of closing of gate valve is too large, flashboard sealing surface and sealing surface of seat frictional force are excessive on the one hand easily causes that sealing surface scratch damages, second aspect easily causes that valve seat and flashboard sealing surface damage because of excessive deformation, the 3rd aspect shaft length is longer, excessive axial pressure easily produces bending deflection, the 4th aspect even can cause the excessive stretching of flange bolt in gate valve and damage and the seal leakage of middle flange.In order to ensure gate valve, under any circumstance can both open, gate valve need to arrange larger opening force conventionally, and particularly at high temperature, due to the thermal expansion of material, it is tightr that flashboard and valve seat can be fitted, and therefore needs larger opening force.
For common Pneumatic gate valve, it is essentially identical closing power and opening force, and due to the existence of valve rod, the power of closing that the gas medium of Pneumatic gate valve acts on piston is also larger than opening force, therefore, common Pneumatic gate valve, because opening force is less, in using process, gate valve after closing often can not be guaranteed to open, in order to make gate valve, open, normally heighten the bleed pressure of Pneumatic actuator, but, too high bleed pressure, tend to cause that the power of closing of gate valve is excessive, thereby produce a series of problem, therefore, there is the problem of closing power and opening force contradiction in conventional Pneumatic gate valve, cause Pneumatic gate valve often to occur variety of issue.
Summary of the invention
The deficiency existing for prior art, the utility model provides the Pneumatic gate valve of a kind of anti-wear, leakage, distortion, stable reduced valve closing pressure.
For achieving the above object, the utility model provides following technological scheme: a kind of Pneumatic gate valve that reduces valve closing pressure, include valve body, valve gap and Pneumatic actuator, described valve body is provided with medium inlet passage, the connecting passage of medium flow pass and connecting media inlet passage and medium flow pass, the joining place of medium inlet passage and medium flow pass and connecting passage is provided with valve seat, in connecting passage, be provided with can with the flashboard of valve base sealing, valve gap place is provided with one end and extends in connecting passage and be connected with flashboard, the other end extends to outer valve rod, Pneumatic actuator includes air pump, the solenoid valve of the changeable air flue of cylinder and connection cylinder and air pump, in cylinder, be provided with and can be subject to air pump to drive the piston moving along cylinder axial reciprocating, piston and valve rod are connected, it is characterized in that: between described cylinder and air pump, be provided with the valve closing mechanism of decompressor, this valve closing mechanism of decompressor includes the decompression cylinder that diameter is less than cylinder, decompression cylinder and cylinder conducting, and valve rod extends in decompression cylinder, the connectivity part of cylinder and decompression cylinder is provided with and is connected with valve rod and can yearns for along decompression cylinder axis the decompression piston of polyslip, in described cylinder, be positioned at piston bottom and be valve opening actuator chamber towards the lower cavity of valve body, this valve opening actuator chamber place is provided with the entry port being communicated with air pump, the space that is positioned at decompression piston top in decompression cylinder is valve closing actuator chamber, this valve closing actuator chamber is provided with the valve closing suction port being communicated with air pump, the upper cavity conducting of the space of decompression piston bottom and piston, offers the equalizing orifice with the outside conducting of cylinder in the upper cavity in cylinder.
Adopt technique scheme, by the valve closing mechanism of decompressor is set between cylinder and air pump, this valve closing mechanism of decompressor is positioned at the decompression cylinder that cylinder connects, and in decompression cylinder, be provided with the decompression piston with valve rod interlock, after arranging like this, piston and decompression piston link with valve rod respectively, be that piston and decompression piston are synchronous operation, when the source of the gas of air pump is entered in valve opening actuator chamber piston is implemented to compress by the entry port of cylinder, piston rises in cylinder, valve rod also can be along with the rising of piston simultaneously, with the flashboard of valve rod interlock just can be separated with valve seat, make medium inlet passage and the conducting of medium flow pass of valve body, valve is in opening state, when valve need to be closed, the source of the gas of air pump is entered by the suction port place that closes of the cylinder that reduces pressure, air pressure in the valve opening actuator chamber of cylinder is discharged by entry port place, decompression piston in decompression cylinder is subject to compressing of air pressure, towards cylinder direction, move, also can impel valve rod to decline simultaneously, with the flashboard of valve rod interlock can with valve seat combination seal, make valve closing.In said process, because valve opening suffered driving air pressure when closing is consistent, in the time that valve closing can being caused, between flashboard and valve seat, there is friction or collision and valve rod bending deflection, in order to prevent that this type of situation from occurring, the diameter of decompression cylinder is less than the diameter of cylinder, the diameter of the decompression piston in decompression cylinder is also just less than the diameter of piston, air pressure enter into decompression cylinder valve closing actuator chamber in time, because decompression cylinder interior space is less than cylinder, and the stress surface of decompression piston also can be less than piston, as can be seen here, pressure when pressure during valve closing is less than valve opening, thereby to the flashboard in valve, valve seat and valve rod have played protective action, can effectively prevent that valve body from wearing and tearing, leak and distortion.
The utility model is further set to: between the valve closing actuator chamber of the valve opening actuator chamber of solenoid valve and cylinder and decompression cylinder, be provided with the Pneumatic valve by electromagnetic valve, this Pneumatic valve include with the air inlet port of air pump conducting, by solenoid-driven can with the conducting of air inlet port or with valve opening air inlet and outlet end mouth and the valve closing air inlet and outlet end mouth of outside conducting, valve opening air inlet and outlet end mouth and valve closing air inlet and outlet end mouth are respectively by connecting pipeline and cylinder and the conducting of decompression cylinder.
Adopt technique scheme, because the aperture of solenoid valve is mostly less, air inflow is little, driving pressure cannot guarantee, the utility model is separately being established Pneumatic valve, and solenoid valve implements as the port of controlling in Pneumatic valve the switch switching, not only easy to operate, and also the working state when making the unlatching of valve or closing is more stable.
The utility model is further set to: between the outer circumferential face of piston and decompression piston and cylinder and decompression cylinder, be respectively equipped with seal ring.
Adopt technique scheme, setting can make sealing be guaranteed like this, has guaranteed the air pressure of valve when opening or closing, and makes its operation more stable.
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is the structural representation of the valve closing mechanism of decompressor and Pneumatic actuator in the utility model embodiment.
Embodiment
As Fig. 1, a kind of Pneumatic gate valve that reduces valve closing pressure shown in Fig. 2, include valve body 1, valve gap 2 and Pneumatic actuator 3, valve body 1 is provided with medium inlet passage 11, the connecting passage 13 of medium flow pass 12 and connecting media inlet passage 11 and medium flow pass 12, medium inlet passage 11 and medium flow pass 12 are provided with valve seat 14 with the joining place of connecting passage 13, in connecting passage 13, be provided with the flashboard 15 that can seal with valve seat 14, valve gap 2 places are provided with one end and extend in connecting passage 13 and be connected with flashboard 15, the other end extends to outer valve rod 16, Pneumatic actuator 3 includes air pump 31, the solenoid valve 33 of the changeable air flue of cylinder 32 and connection cylinder 32 and air pump 31, in cylinder 32, be provided with and can be subject to air pump 31 to drive the piston 34 moving along cylinder 32 axial reciprocatings, piston 34 is connected with valve rod 16, between cylinder 32 and air pump 31, be provided with the valve closing mechanism of decompressor 4, this valve closing mechanism of decompressor 4 includes the decompression cylinder 41 that diameter is less than cylinder 32, decompression cylinder 41 and cylinder 32 conductings, and valve rod 16 extends in decompression cylinder 41, the connectivity part of cylinder 32 and decompression cylinder 41 is provided with and is connected with valve rod 16 and can be along the decompression piston 42 of decompression cylinder 41 axial reciprocating slippages, in cylinder 32, be positioned at piston 34 bottoms and be valve opening actuator chamber 321 towards the lower cavity of valve body 1, these valve opening actuator chamber 321 places are provided with the entry port 322 being communicated with air pump 31, the space that is positioned at decompression piston 42 tops in decompression cylinder 41 is valve closing actuator chamber 411, this valve closing actuator chamber 411 is provided with the valve closing suction port 412 being communicated with air pump 31, upper cavity 323 conductings of the space of decompression piston 42 bottoms and cylinder 32 inner carriers 34, offer the equalizing orifice 324 with cylinder 32 outside conductings in the upper cavity 323 in cylinder 32.By the valve closing mechanism of decompressor 4 being set between cylinder 32 and air pump 31, this valve closing mechanism of decompressor 4 is positioned at the decompression cylinder 41 that cylinder 32 connects, and in decompression cylinder 41, be provided with the decompression piston 42 with valve rod 16 interlocks, after arranging like this, piston 34 and decompression piston 42 link with valve rod 16 respectively, be that piston 34 is synchronous operation with decompression piston 42, when the source of the gas of air pump 31 is entered into by the entry port 322 of cylinder 32, valve opening actuator chamber 321 is interior to be implemented to compress to piston 34, piston 34 is in the interior rising of cylinder 31, valve rod 16 also can be along with piston 34 rises simultaneously, with the flashboard 15 of valve rod 16 interlock just can be separated with valve seat 14, make the medium inlet passage 11 and 12 conductings of medium flow pass of valve body 1, valve is in opening state, when valve need to be closed, the source of the gas of air pump 31 is entered by valve closing suction port 412 places of the cylinder 41 that reduces pressure, air pressure in the valve opening actuator chamber 321 of cylinder 32 is discharged by entry port 322 places, decompression piston 42 in decompression cylinder 41 is subject to compressing of air pressure, towards cylinder 32 directions, move, also can impel valve rod 16 to decline simultaneously, with 15, the flashboard of valve rod 16 interlocks can with valve seat 14 combination seals, make valve closing.In said process, because valve opening suffered driving air pressure when closing is consistent, in the time that valve closing can being caused, between flashboard 15 and valve seat 14, there are friction or collision and valve rod 16 bending deflections, in order to prevent that this type of situation from occurring, the diameter of decompression cylinder 41 is less than the diameter of cylinder 32, the diameter of the decompression piston 42 in decompression cylinder 41 is also just less than the diameter of piston 34, air pressure enters into the valve closing actuator chamber 411 of decompression cylinder 41 when interior, because decompression cylinder 41 internal space ratio cylinders 32 are little, and the stress surface of decompression piston 42 also can be less than piston 34, the driving pressure that decompression piston 42 is subject to is less than piston 34, as can be seen here, pressure when pressure during valve closing is less than valve opening, thereby to the flashboard 15 in valve body 1, valve seat 14 and valve rod 16 have played protective action, can effectively prevent that valve body 1 from wearing and tearing, leak and distortion.On cylinder 32, be to cause piston 24 to move for fear of the interior formation vacuum of upper cavity 323 of cylinder 32 with equalizing orifice 324 setting of outside conducting.
In the utility model embodiment, because the aperture of solenoid valve 33 is mostly less, air inflow is little, and driving pressure cannot guarantee; If adopt the larger solenoid valve 33 of bore, can make cost of production improve.In order to make the operation that valve can be normally stable, between the valve closing actuator chamber 411 of the valve opening actuator chamber 321 of solenoid valve 33 and cylinder 32 and decompression cylinder 41, be provided with the Pneumatic valve 5 of controlling by solenoid valve 33, this Pneumatic valve 5 include with the air inlet port 51 of air pump 31 conductings, by solenoid valve 33 drive can with 51 conductings of air inlet port or with valve opening air inlet and outlet end mouth 52 and the valve closing air inlet and outlet end mouth 53 of outside conducting, valve opening air inlet and outlet end mouth 52 and valve closing air inlet and outlet end mouth 53 are respectively by connecting pipeline 6 and cylinder 32 and 41 conductings of decompression cylinder.
When the flashboard 15 of valve body 1 need to be opened, 33 pairs of Pneumatic valves of solenoid valve 5 are implemented to control, make the air inlet port 51 and 52 conductings of valve opening air inlet and outlet end mouth of Pneumatic valve 5, simultaneously, valve closing air inlet and outlet end mouth 53 and outside atmosphere conducting, the air pressure that makes to reduce pressure in the valve closing actuator chamber 411 of cylinder 41 can be discharged by valve closing air inlet and outlet end mouth 53, and source of the gas is entered in the valve opening actuator chamber 321 of cylinder 32 by valve opening air inlet and outlet end 52, air pressure is implemented to conflict to piston 34, make piston 34 be in reverse to valve body 1 and move (being that piston 34 is in the interior rising of cylinder 32), piston 34 moves the valve rod 16 that simultaneously can link and moves together, make valve rod 16 drive flashboard 15 to rise, valve is in opening state, and when valve need to be closed, solenoid valve 33 is implemented to control to Pneumatic valve 5 again, make the air inlet port 51 and 53 conductings of valve closing air inlet and outlet end mouth of Pneumatic valve 5, and valve opening air inlet and outlet end mouth 52 and outside atmosphere conducting, air pressure in the valve opening actuator chamber 321 of cylinder 32 is discharged by valve opening air inlet and outlet end mouth 52 places, the source of the gas of air pump 31 is entered into by valve closing air inlet and outlet end mouth 53 that the valve closing actuator chamber 411 of decompression cylinder 41 is interior to be implemented to conflict to decompression piston 42, decompression piston 42 moves towards valve body 1, make flashboard 15 and valve seat 14 sealings in valve body 1, impel valve closing.
In order to guarantee the sealing in cylinder 32 and decompression cylinder 41, make the stable gas pressure of valve when opening or closing, between the outer circumferential face of piston 34 and decompression piston 42 and cylinder 32 and decompression cylinder 41, be respectively equipped with seal ring 7.It should be noted that, sealing circle 7 can be O type or lip, is all feasible.
Claims (3)
1. the Pneumatic gate valve that can reduce valve closing pressure, include valve body, valve gap and Pneumatic actuator, described valve body is provided with medium inlet passage, the connecting passage of medium flow pass and connecting media inlet passage and medium flow pass, the joining place of medium inlet passage and medium flow pass and connecting passage is provided with valve seat, in connecting passage, be provided with can with the flashboard of valve base sealing, valve gap place is provided with one end and extends in connecting passage and be connected with flashboard, the other end extends to outer valve rod, Pneumatic actuator includes air pump, the solenoid valve of the changeable air flue of cylinder and connection cylinder and air pump, in cylinder, be provided with and can be subject to air pump to drive the piston moving along cylinder axial reciprocating, piston and valve rod are connected, it is characterized in that: between described cylinder and air pump, be provided with the valve closing mechanism of decompressor, this valve closing mechanism of decompressor includes the decompression cylinder that diameter is less than cylinder, decompression cylinder and cylinder conducting, and valve rod extends in decompression cylinder, the connectivity part of cylinder and decompression cylinder is provided with and is connected with valve rod and can yearns for along decompression cylinder axis the decompression piston of polyslip, in described cylinder, be positioned at piston bottom and be valve opening actuator chamber towards the lower cavity of valve body, this valve opening actuator chamber place is provided with the entry port being communicated with air pump, the space that is positioned at decompression piston top in decompression cylinder is valve closing actuator chamber, this valve closing actuator chamber is provided with the valve closing suction port being communicated with air pump, the upper cavity conducting of the space of decompression piston bottom and piston, offers the equalizing orifice with the outside conducting of cylinder in the upper cavity in cylinder.
2. the Pneumatic gate valve that reduces valve closing pressure according to claim 1, it is characterized in that: between the valve closing actuator chamber of the valve opening actuator chamber of described solenoid valve and cylinder and decompression cylinder, be provided with the Pneumatic valve by electromagnetic valve, this Pneumatic valve includes the air inlet port with air pump conducting, by solenoid-driven can with the conducting of air inlet port or with valve opening air inlet and outlet end mouth and the valve closing air inlet and outlet end mouth of outside conducting, valve opening air inlet and outlet end mouth and valve closing air inlet and outlet end mouth are respectively by connecting pipeline and cylinder and the conducting of decompression cylinder.
3. the Pneumatic gate valve that reduces valve closing pressure according to claim 1 and 2, is characterized in that: between the outer circumferential face of described piston and decompression piston and cylinder and decompression cylinder, be respectively equipped with seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420408557.4U CN203963206U (en) | 2014-07-23 | 2014-07-23 | Can reduce the Pneumatic gate valve of valve closing pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420408557.4U CN203963206U (en) | 2014-07-23 | 2014-07-23 | Can reduce the Pneumatic gate valve of valve closing pressure |
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| CN203963206U true CN203963206U (en) | 2014-11-26 |
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| CN201420408557.4U Active CN203963206U (en) | 2014-07-23 | 2014-07-23 | Can reduce the Pneumatic gate valve of valve closing pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559439A (en) * | 2017-11-02 | 2018-01-09 | 邵丽娃 | A kind of valve |
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2014
- 2014-07-23 CN CN201420408557.4U patent/CN203963206U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559439A (en) * | 2017-11-02 | 2018-01-09 | 邵丽娃 | A kind of valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170710 Address after: 323000 Nanming road Zhejiang city Lishui province Shuige Industrial Zone No. 772 Patentee after: Lishui Chaoda Valve Group Co. Ltd. Address before: Jiangbei Avenue Oubei town of Yongjia County of Wenzhou City, Zhejiang province 325000 Patentee before: Chaoda Valve Group Co., Ltd. |
|
| TR01 | Transfer of patent right |