CN114763846A - Pneumatic control quick exhaust valve capable of preventing opening degree from overshooting - Google Patents
Pneumatic control quick exhaust valve capable of preventing opening degree from overshooting Download PDFInfo
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- CN114763846A CN114763846A CN202210238742.2A CN202210238742A CN114763846A CN 114763846 A CN114763846 A CN 114763846A CN 202210238742 A CN202210238742 A CN 202210238742A CN 114763846 A CN114763846 A CN 114763846A
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- valve
- quick exhaust
- valve body
- overshoot
- opening degree
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- 238000007789 sealing Methods 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 28
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a pneumatic control quick exhaust valve capable of preventing opening overshoot, which comprises a valve body, a valve core, a membrane cover and a membrane assembly used for driving the valve core to move, wherein the membrane cover and the valve body are fixed in a sealing manner, an operation cavity is defined between the membrane cover and the valve body, the membrane assembly is arranged in the operation cavity, a signal interface communicated with the operation cavity is arranged on the membrane cover, an air inlet, an air outlet and a quick exhaust port which are mutually communicated are arranged on the valve body, one end of the valve core penetrates through the valve body and is connected with the valve body in a sliding manner, the other end of the valve core is arranged in the operation cavity and is fixed with the membrane assembly, and one end of the valve core penetrating through the valve body is pressed and seals the quick exhaust port. The invention provides a pneumatic control quick exhaust valve capable of preventing opening degree overshoot, which can solve the problem of opening degree overshoot of an anti-surge regulating valve with the quick exhaust valve in the slow closing process and ensure the working stability and accuracy of the anti-surge regulating valve.
Description
Technical Field
The invention relates to the technical field of anti-surge valves, in particular to a pneumatic control quick-discharge valve capable of preventing opening degree from overshooting.
Background
The anti-surge regulating valve is an important executing element of an anti-surge system of a compressor, the valve is required to have the regulating characteristic of quick opening and full closing, the valve is required to reach a full opening position within 0.5-2S, and at the moment, a quick discharge valve is required to be configured in a control gas circuit of the valve to realize quick opening of the valve. The ordinary quick-discharge valve can cause abnormal fluctuation of the valve in the use process, the working stability and accuracy of the anti-surge regulating valve are seriously influenced, and certain potential safety hazard is brought to the operation of a compressor.
Chinese patent application publication No. CN201620780448.4, publication date is 2017, 01, 04, entitled "quick exhaust valve", and discloses a quick exhaust valve, which comprises a valve body, a valve cavity is provided in the valve body, one end of the valve body is provided with a P port communicated with the valve cavity, the other end of the valve body is provided with a valve seat, a sealing ring is provided between the valve seat and the valve body, and an R port communicated with the valve cavity is provided on the valve seat, the valve body is provided with an a port communicated with the valve cavity corresponding to the valve seat, a sealing gasket is provided in the valve cavity, one end of the valve cavity corresponding to the sealing gasket is provided with an annular clamping table matched with the sealing gasket, and the other end of the sealing gasket is abutted on the valve seat. However, in the quick exhaust valve, when the opening of the anti-surge regulating valve needs to be reduced, the air pressure in the P port 102 will be reduced, and at this time, the high air pressure in the a port 103 will recoil the sealing gasket 13, so that the R port 111 and the a port 103 are temporarily communicated, abnormal exhaust occurs, and the air pressure in the a port 103 is excessively reduced, so that a stroke overshoot phenomenon occurs when the valve is normally adjusted. Therefore, it is necessary to design a pneumatic control quick exhaust valve capable of preventing the opening degree from being overshot so as to solve the above problems.
Disclosure of Invention
The invention provides a pneumatic control quick exhaust valve capable of preventing opening overshoot, aiming at overcoming the problem that an anti-surge regulating valve provided with a common quick exhaust valve in the prior art has an opening overshoot phenomenon in the slow closing process, solving the problem that the anti-surge regulating valve provided with the quick exhaust valve has the opening overshoot in the slow closing process, and ensuring the stability and the accuracy of the operation of the anti-surge regulating valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a can prevent gas accuse quick-release valve that aperture overshot, includes valve body, case, membrane lid and is used for driving the diaphragm subassembly that the case removed, and the membrane lid is fixed with the valve body is sealed, encloses into the operation chamber between membrane lid and the valve body, and the diaphragm subassembly sets up at the operation intracavity, is equipped with the signal interface with operation chamber intercommunication on the membrane lid, be equipped with the air inlet, gas outlet and the quick gas vent of mutual intercommunication on the valve body, the one end of case penetrates the valve body and with valve body sliding connection, the other end setting of case just is fixed with the diaphragm subassembly in the operation intracavity, and the one end that the case penetrated the valve body compresses tightly and seals the quick gas vent.
In the technical scheme, the signal interface is communicated with the output end of the valve positioner to receive an air pressure signal output by the valve positioner, the air inlet is communicated with the main air path, the air outlet is communicated with the actuating mechanism, the quick exhaust port is communicated with the atmosphere, during normal work, the valve positioner outputs the air signal to the signal interface, at the moment, the valve core compresses and seals the quick exhaust port, the air-controlled quick exhaust valve is in a fully-closed state, the air inlet is communicated with the air outlet, and because the air pressure in the valve body is greater than the air pressure in the outside, the air pressure difference can further compress the valve core, and the sealing effect of the valve core is improved. At the moment, if the opening of the anti-surge regulating valve needs to be reduced to 50 percent, the air pressure of the signal interface and the air inlet correspondingly decreases, but as long as the air pressure in the operation cavity is not reduced to be below a critical value, the diaphragm assembly can still press the quick exhaust port, the quick exhaust port cannot be opened, and only the air inlet is communicated with the air outlet all the time, so that the special quick exhaust valve cannot generate abnormal exhaust phenomenon, and the phenomenon of opening overshoot cannot occur. When the anti-surge regulating valve is required to be opened quickly and fully, only the air pressure in the air inlet and the signal interface needs to be reduced, the air pressure in the operation cavity is reduced to be lower than a critical value, the valve core is reset quickly by the membrane assembly, the air inlet, the air outlet and the quick air exhaust port are communicated quickly by the valve core, compressed air in the actuating mechanism can quickly exhaust air from the air outlet to the quick air exhaust port, and the requirement that the anti-surge regulating valve is opened quickly is met.
Preferably, the valve core comprises a guide rod and a sealing plate, the sealing plate is arranged in the valve body and is matched with the quick exhaust port, and the valve core is pressed through the sealing plate and seals the quick exhaust port. The structure can increase the sealing effect of the valve core.
Preferably, the inner end face of the quick exhaust port is provided with a sealing end face, and the sealing end face is provided with a sealing ring. The structure can increase the sealing effect of the valve core.
Preferably, the diaphragm assembly comprises a diaphragm body, a piston, an expansion spring and a nut, the diaphragm body, the piston and the expansion spring are arranged in the operation cavity, the piston and the nut are fixed with the valve core, the diaphragm body is arranged between the piston and the diaphragm cover, the valve body and the diaphragm cover compress and seal the edge part of the diaphragm body, the piston and the nut compress and seal the middle part of the diaphragm body, and two ends of the expansion spring are respectively connected with the piston and the valve body. The structure can realize the movement of the valve core through the air pressure signal received by the signal interface, thereby realizing the control of the opening and closing of the quick exhaust port. When the air pressure of the signal interface is higher than a critical value, the diaphragm body drives the piston and one side of the quick exhaust port to move, so that the valve core compresses the quick exhaust port; when the air pressure of the signal interface is lower than a critical value, the telescopic spring drives the piston to be far away from the quick exhaust port, and the quick exhaust port is opened.
Preferably, the diaphragm body divides the operation cavity into a first cavity and a second cavity, the first cavity is communicated with the signal interface, and the second cavity is communicated with the atmosphere. The structure may reduce the effect of the air pressure within the second chamber on the movement of the diaphragm assembly.
Preferably, the valve body comprises a valve body and a guide sleeve, and the valve core is connected with the guide sleeve in a sliding mode.
Preferably, the guide sleeve is provided with an O-shaped ring.
Preferably, the air inlet is communicated with the signal interface through an external pipeline.
The beneficial effects of the invention are: the problem of opening overshoot of the anti-surge regulating valve with the rapid-discharge valve in the slow-closing process can be solved, and the working stability and accuracy of the anti-surge regulating valve are guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a fully closed state of the pneumatic control quick exhaust valve in the invention;
fig. 2 is a structural schematic diagram of the pneumatic control quick exhaust valve in a full-open state.
In the figure: the high-pressure quick-opening type valve comprises a valve body 1, an air inlet 1.1, an air outlet 1.2, a quick air outlet 1.3, a valve body 1.4, a guide sleeve 1.5, a valve core 2, a guide rod 2.1, a sealing plate 2.2, a membrane cover 3, a signal interface 3.1, a membrane assembly 4, a membrane body 4.2, a piston 4.3, a telescopic spring 4.4, a nut 4.5, an operation cavity 5, a sealing ring 6 and an O-shaped ring 7.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1 and 2, the pneumatic control quick exhaust valve capable of preventing opening degree overshoot comprises a valve body 1, a valve core 2, a membrane cover 3 and a membrane assembly 4 for driving the valve core 2 to move, wherein the valve body 1 comprises a valve body 1.4 and a guide sleeve 1.5 which are fixed in a sealing manner, an O-ring 7 is arranged between the valve body 1.4 and the guide sleeve 1.5, the membrane cover 3 and the valve body 1 are fixed in a sealing manner through screws, an operation cavity 5 is enclosed between the membrane cover 3 and the guide sleeve 1.5, the membrane assembly 4 is arranged in the operation cavity 5, a signal interface 3.1 communicated with the operation cavity 5 is arranged on the membrane cover 3, an air inlet 1.1, an air outlet 1.2 and a quick exhaust port 1.3 which are communicated with each other are arranged on the valve body 1.4, and the air inlet 1.1 is communicated with the signal interface 3.1 through an external pipeline. Case 2 includes guide arm 2.1 and closing plate 2.2 of reciprocal anchorage, and the one end of guide arm 2.1 penetrates uide bushing 1.5 and with uide bushing 1.5 sliding connection, be equipped with O type circle 7 on the uide bushing 1.5, the other end setting of guide arm 2.1 is in operation chamber 5 and fixed with diaphragm subassembly 4, and closing plate 2.2 sets up in valve body 1, closing plate 2.2 and quick gas vent 1.3 adaptation, and closing plate 2.2's terminal surface compresses tightly and seals quick gas vent 1.3. The inner end face of the quick exhaust port 1.3 is provided with a sealing end face, and a sealing ring 6 is arranged on the sealing end face.
The diaphragm assembly 4 comprises a diaphragm body 4.2, a piston 4.3, an extension spring 4.4 and a nut 4.5, the diaphragm body 4.2, the piston 4.3 and the extension spring 4.4 are arranged in the operation cavity 5, the piston 4.3 and the nut 4.5 are fixed with the valve core 2, the diaphragm body 4.2 is arranged between the piston 4.3 and the diaphragm cover 3, the valve body 1 and the diaphragm cover 3 compress and seal the edge part of the diaphragm body 4.2, the piston 4.3 and the nut 4.5 compress and seal the middle part of the diaphragm body 4.2, and two ends of the extension spring 4.4 are respectively connected with the piston 4.3 and the valve body 1. A gasket is arranged between the diaphragm body 4.2 and the nut 4.5.
In the technical scheme, the signal interface 3.1 is communicated with the output end of the valve positioner to receive an air pressure signal output by the valve positioner, the air inlet 1.1 is communicated with a main air path, the air outlet 1.2 is communicated with the actuating mechanism, the quick exhaust port 1.3 is communicated with the atmosphere, during normal work, the valve positioner outputs an air signal to the signal interface 3.1, at the moment, the valve core 2 compresses and seals the quick exhaust port 1.3, the pneumatic control quick exhaust valve is in a fully closed state, the air inlet 1.1 is communicated with the air outlet 1.2, and because the air pressure in the valve body 1 is higher than that in the outside, the air pressure difference can further compress the valve core 2, and the sealing effect of the valve core 2 is improved. At this time, if the opening of the anti-surge regulating valve needs to be reduced from 90% to 50%, the air pressure of the signal interface 3.1 and the air inlet 1.1 correspondingly decreases, but as long as the air pressure in the operation cavity 5 does not decrease below the critical value, the diaphragm assembly 4 can still press the quick air outlet 1.3, the quick air outlet 1.3 cannot be opened, and only the air inlet 1.1 is communicated with the air outlet 1.2 all the time, so that the special quick exhaust valve cannot generate abnormal exhaust phenomenon, and the phenomenon of opening overshoot cannot occur. When the anti-surge regulating valve needs to be quickly and fully opened, only the air pressure in the air inlet 1.1 and the air pressure in the signal interface 3.1 need to be reduced, the air pressure in the operation cavity 5 is reduced to be lower than a critical value, the diaphragm assembly 4 can quickly reset the valve core 2, the air inlet 1.1, the air outlet 1.2 and the quick air exhaust port 1.3 are quickly communicated by the valve core 2, compressed air in the execution mechanism can quickly exhaust air from the air outlet 1.2 to the quick air exhaust port 1.3, and the requirement that the anti-surge regulating valve is quickly opened is met.
The invention has the beneficial effects that: the problem of opening overshoot of the anti-surge regulating valve with the rapid-exhaust valve in the slow closing process can be solved, and the working stability and accuracy of the anti-surge regulating valve are guaranteed.
Claims (8)
1. The pneumatic control quick exhaust valve capable of preventing opening overshoot is characterized by comprising a valve body, a valve core, a membrane cover and a membrane assembly used for driving the valve core to move, wherein the membrane cover is fixed with the valve body in a sealing mode, an operation cavity is defined between the membrane cover and the valve body, the membrane assembly is arranged in the operation cavity, a signal interface communicated with the operation cavity is arranged on the membrane cover, an air inlet, an air outlet and a quick exhaust port which are communicated with each other are formed in the valve body, one end of the valve core penetrates into the valve body and is in sliding connection with the valve body, the other end of the valve core is arranged in the operation cavity and is fixed with the membrane assembly, and one end of the valve core penetrating into the valve body is pressed and seals the quick exhaust port.
2. The pneumatic control quick exhaust valve capable of preventing overshoot of opening degree according to claim 1, wherein the valve core comprises a guide rod and a sealing plate, the sealing plate is arranged in the valve body, the sealing plate is matched with the quick exhaust port, and the valve core is pressed by the sealing plate and seals the quick exhaust port.
3. The pneumatic control quick exhaust valve capable of preventing opening degree overshoot as claimed in claim 1, wherein a sealing end face is arranged on the inner end face of the quick exhaust port, and a sealing ring is arranged on the sealing end face.
4. The pneumatic control quick exhaust valve capable of preventing opening degree overshoot according to claim 1, 2 or 3, wherein the diaphragm assembly comprises a diaphragm body, a piston, a telescopic spring and a nut, the diaphragm body, the piston and the telescopic spring are arranged in the operation cavity, the piston and the nut are fixed with the valve core, the diaphragm body is arranged between the piston and the diaphragm cover, the valve body and the diaphragm cover press and seal the edge part of the diaphragm body, the piston and the nut press and seal the middle part of the diaphragm body, and two ends of the telescopic spring are respectively connected with the piston and the valve body.
5. The pneumatic control quick exhaust valve capable of preventing opening degree overshoot as claimed in claim 4, wherein the diaphragm body divides the operation cavity into a first cavity and a second cavity, the first cavity is communicated with the signal interface, and the second cavity is communicated with the atmosphere.
6. An air-controlled quick exhaust valve capable of preventing opening degree overshoot according to claim 1, 2 or 3, wherein the valve body comprises a valve body and a guide sleeve, and the valve core is in sliding connection with the guide sleeve.
7. The pneumatic control quick exhaust valve capable of preventing overshoot of opening degree as claimed in claim 6, wherein an O-shaped ring is arranged on the guide sleeve.
8. An air control quick exhaust valve capable of preventing overshoot of opening degree as claimed in claim 1, 2 or 3, wherein the air inlet is communicated with the signal interface through an external pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210238742.2A CN114763846A (en) | 2022-03-11 | 2022-03-11 | Pneumatic control quick exhaust valve capable of preventing opening degree from overshooting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210238742.2A CN114763846A (en) | 2022-03-11 | 2022-03-11 | Pneumatic control quick exhaust valve capable of preventing opening degree from overshooting |
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| Publication Number | Publication Date |
|---|---|
| CN114763846A true CN114763846A (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210238742.2A Pending CN114763846A (en) | 2022-03-11 | 2022-03-11 | Pneumatic control quick exhaust valve capable of preventing opening degree from overshooting |
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| CN (1) | CN114763846A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203442275U (en) * | 2013-09-05 | 2014-02-19 | 中联重科股份有限公司 | Pneumatic control stop valve and chassis power takeoff control system |
| CN206539730U (en) * | 2017-03-02 | 2017-10-03 | 浙江永盛科技股份有限公司 | A kind of three-way pressure balance type three-way control valve |
| CN211202961U (en) * | 2019-12-04 | 2020-08-07 | 青岛精锐机械制造有限公司 | Pneumatic control integrated valve |
| CN113217645A (en) * | 2021-04-28 | 2021-08-06 | 纽托克流体控制有限公司 | Anti-surge valve and anti-surge regulating valve control system |
-
2022
- 2022-03-11 CN CN202210238742.2A patent/CN114763846A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203442275U (en) * | 2013-09-05 | 2014-02-19 | 中联重科股份有限公司 | Pneumatic control stop valve and chassis power takeoff control system |
| CN206539730U (en) * | 2017-03-02 | 2017-10-03 | 浙江永盛科技股份有限公司 | A kind of three-way pressure balance type three-way control valve |
| CN211202961U (en) * | 2019-12-04 | 2020-08-07 | 青岛精锐机械制造有限公司 | Pneumatic control integrated valve |
| CN113217645A (en) * | 2021-04-28 | 2021-08-06 | 纽托克流体控制有限公司 | Anti-surge valve and anti-surge regulating valve control system |
Non-Patent Citations (1)
| Title |
|---|
| 吴国良: "调节阀的故障诊断及处理建议(一)", 石油化工自动化, vol. 55, no. 1, 28 February 2019 (2019-02-28), pages 77 - 80 * |
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