CN110067881B - Double-pilot pressure self-operated regulating valve - Google Patents
Double-pilot pressure self-operated regulating valve Download PDFInfo
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- CN110067881B CN110067881B CN201910452706.4A CN201910452706A CN110067881B CN 110067881 B CN110067881 B CN 110067881B CN 201910452706 A CN201910452706 A CN 201910452706A CN 110067881 B CN110067881 B CN 110067881B
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 36
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a double-pilot pressure self-operated regulating valve. The valve body extension pipeline is provided with a pressure taking port, a self-operated regulating valve arranged on the valve body extension pipeline, a first pilot valve which is kept in a normally open state and a second pilot valve which is kept in a normally closed state are arranged on the valve body extension pipeline, and the pressure set value of the first pilot valve is smaller than the pressure set value of the second pilot valve. The invention can solve the problem of valve surge.
Description
Technical Field
The invention relates to the technical field of pilot valves, in particular to a double-pilot pressure self-operated regulating valve.
Background
The existing pilot pressure self-operated regulating valve is shown in fig. 1, and is characterized in that a pressure spring is arranged on a main valve core and inside the valve, and the working principle of the self-operated pressure regulating valve is as follows:
When the pilot valve is closed, the medium pressure in the pipeline before the valve is P1=Ps (pressure on the membrane), and the valve is in a closed state under the action of the spring force in the main valve. When the pressure P2 of the medium behind the valve is lower than the pressure of the set working condition, the pilot valve is opened, the pressure of PS is reduced, at the moment, the acting force on the diaphragm and the force of the pressure regulating spring are smaller than the force of the medium P1 in the pipeline acting on the surface of the valve core, the valve core moves upwards, and the valve is opened.
The main defects are as follows: the valve is only suitable for occasions with small flow and pressure changes, when the pressure changes slightly fast, the valve surge is serious, the noise is large, and the stable output of gas can not be ensured; the pressure regulating spring is installed in the valve, so that the valve is inconvenient to process and maintain, and takes a long time.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a double-pilot pressure self-operated regulating valve which can solve the problem of valve surge.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The utility model provides a two guide pressure self-operated control valves, includes the valve body extension pipeline that is equipped with the pressure taking port, locates the valve body extension pipeline's self-operated control valve the valve body extension pipeline is equipped with the first pilot valve that keeps normally open state and the second pilot valve that keeps normally closed state, the second pilot valve includes third air inlet, fourth air inlet and second gas vent, the third air inlet intercommunication pressure taking port, pressure taking port is greater than when the pressure setting value of second pilot valve fourth air inlet with the second gas vent intercommunication, fourth air inlet intercommunication pressure taking port in order to admit air to the second pilot valve, the second gas vent intercommunication self-operated control valve's valve port is in order to control self-operated control valve's opening and shutting, the first pilot valve includes first air inlet, second air inlet and first gas vent, the first air inlet intercommunication pressure taking port, pressure taking port pressure is greater than when the pressure setting value of first pilot valve second air inlet and first gas vent disconnection, second air inlet intercommunication pressure valve with the second gas vent is less than the setting value.
Preferably, the first pilot valve comprises a first chamber, a second chamber and a first valve rod penetrating through the first chamber and the second chamber, a first spring and a first diaphragm are arranged in the first chamber, one end of the first spring is connected with the first chamber, the other end of the first spring is connected with the first valve rod, the first diaphragm is connected with the first valve rod, a first valve core is arranged in the second chamber, and the first valve rod is located at one end in the second chamber and connected with the first valve core.
Preferably, the first air inlet is arranged below the first diaphragm in the first cavity, the second air inlet and the first air outlet are arranged on two sides of the first valve core in the second cavity, the first pilot valve is located at an opening position, the first spring drives the first valve rod to drive the first valve core to move downwards, the second air inlet is communicated with the first air outlet, the first pilot valve is located at a closing position, the first diaphragm drives the first valve rod to drive the first valve core to move upwards, and the second air inlet is disconnected with the first air outlet.
Preferably, the second pilot valve comprises a third chamber, a fourth chamber and a second valve rod penetrating through the third chamber and the fourth chamber, a second spring and a second diaphragm are arranged in the third chamber, one end of the second spring is connected with the third chamber, the other end of the second spring is connected with the second valve rod, the second diaphragm is connected with the second valve rod, a second valve core is arranged in the fourth chamber, and the second valve rod is located at one end of the fourth chamber and connected with the second valve core.
Preferably, the third air inlet is arranged below the second diaphragm in the third cavity, the fourth air inlet and the second air outlet are arranged on two sides of the second valve core in the fourth cavity, the second pilot valve is located at a closing position, the second spring drives the second valve rod to drive the second valve core to move downwards, the fourth air inlet and the second air outlet are disconnected, the second pilot valve is located at an opening position, the second diaphragm drives the second valve rod to drive the second valve core to move upwards, and the fourth air inlet is communicated with the second air outlet.
Preferably, the self-operated regulating valve comprises a fifth chamber, a sixth chamber and a third valve rod penetrating through the fifth chamber and the sixth chamber, the fifth chamber is provided with a third spring and a third diaphragm, one end of the third spring is connected with the fifth chamber, the other end of the third spring is connected with the third valve rod, the third diaphragm is connected with the third valve rod, a third valve core is arranged in the sixth chamber, and the third valve rod is located at one end of the sixth chamber and connected with the third valve core.
Preferably, the sixth chamber is communicated with the valve body extension pipeline, the third valve core stretches into the valve body extension pipeline, the self-operated adjusting valve is located at an opening position, the third spring drives the third valve rod to drive the third valve core to move downwards, the valve body extension pipeline is located at the position where the two sides of the self-operated adjusting valve are communicated with each other, the self-operated adjusting valve is located at a closing position, the third diaphragm drives the third valve rod to drive the third valve core to move upwards, and the valve body extension pipeline is located at the position where the two sides of the self-operated adjusting valve are disconnected.
The invention discloses a double-pilot pressure self-operated regulating valve, which has the following advantages:
The pressure regulating range of the valve is increased through the opposite pilot valves of the two inner valve core structures, so that the valve surge is avoided; the valve core is simple in structure, and noise is reduced by adopting a double-layer noise reduction structure; the valve has simple structure and can be maintained on line.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a prior art structure;
Fig. 2 is a block diagram of an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 2, the dual-pilot pressure self-operated regulating valve according to the embodiment of the invention comprises a valve body extension pipeline provided with a pressure taking port, and a self-operated regulating valve arranged in the valve body extension pipeline, wherein the valve body extension pipeline is provided with a first pilot valve which is kept in a normally open state and a second pilot valve which is kept in a normally closed state, and the first pilot valve and the second pilot valve are in a standby state so that the self-operated regulating valve can be kept open. The first pilot valve and the second pilot valve are disposed downstream of the self-operated adjusting valve in the flow direction of the fluid medium. The pressure set point of the first pilot valve is smaller than the pressure set point of the second pilot valve. The valve provided by the invention has two pilot valves, and the valve acts in a certain interval, so that frequent actions can not occur, and the valve surge is avoided. The double-layer noise reduction net is added in the internal structure of the valve, so that the noise of the valve is reduced.
The second pilot valve comprises a third air inlet, a fourth air inlet and a second air outlet, the third air inlet is communicated with the pressure taking port, the fourth air inlet is communicated with the second air outlet when the pressure of the pressure taking port is larger than a pressure set value of the second pilot valve, the fourth air inlet is communicated with the pressure taking port to intake air to the second pilot valve, and the second air outlet is communicated with a valve port of the self-operated regulating valve to control the opening and closing of the self-operated regulating valve.
Specifically, the second pilot valve includes third cavity, fourth cavity, runs through the third cavity with the second valve rod of fourth cavity, be equipped with second spring and second diaphragm in the third cavity, the one end of second spring with third cavity is connected, the other end with the second valve rod is connected, the second diaphragm with the second valve rod is connected, be equipped with the second case in the fourth cavity, the second valve rod is located the one end in the fourth cavity with the second case is connected.
In this embodiment, the third air inlet is disposed below the second diaphragm in the third chamber, the fourth air inlet and the second air outlet are disposed on two sides of the second valve core in the fourth chamber, the second pilot valve is located at a closed position, the second spring drives the second valve rod to drive the second valve core to move downwards, the fourth air inlet and the second air outlet are disconnected, the second pilot valve is located at an open position, the second diaphragm drives the second valve rod to drive the second valve core to move upwards, and the fourth air inlet is communicated with the second air outlet.
In this embodiment, when the air source pressure P2 (connected from the third air inlet) is greater than the pressure set value of the second pilot valve, the second valve element is opened, the fourth air inlet is communicated with the second air outlet, and the air source supplies air to the self-operated valve through the second pilot valve. When the air source pressure P1 (connected from the third air inlet) is smaller than the pressure set value of the second pilot valve, the second valve core is closed, and the fourth air inlet and the second air outlet are disconnected.
The first pilot valve comprises a first air inlet, a second air inlet and a first air outlet, the first air inlet is communicated with the pressure taking port, the second air inlet is disconnected with the first air outlet when the pressure of the pressure taking port is larger than a pressure set value of the first pilot valve, the second air inlet is communicated with a valve port of the self-operated regulating valve, and the first air outlet is connected with the atmosphere to discharge pressure. Specifically, the first pilot valve includes first cavity, second cavity, runs through first cavity with the first valve rod of second cavity, be equipped with first spring and first diaphragm in the first cavity, the one end of first spring with first cavity is connected, the other end with first valve rod is connected, first diaphragm with first valve rod is connected, be equipped with first case in the second cavity, first valve rod is located the one end in the second cavity with first case is connected.
In this embodiment, the first air inlet is disposed below the first diaphragm in the first chamber, the second air inlet and the first air outlet are disposed on two sides of the first valve core in the second chamber, the first pilot valve is located at an open position, the first spring drives the first valve rod to drive the first valve core to move downwards, the second air inlet is communicated with the first air outlet, the first pilot valve is located at a closed position, the first diaphragm drives the first valve rod to drive the first valve core to move upwards, and the second air inlet is disconnected with the first air outlet.
In this embodiment, when the air source pressure P2 (from the first air inlet) is greater than the pressure set point of the first pilot valve, the first valve spool is closed and the second air inlet and the first air outlet are disconnected. When the air source pressure P1 (connected from the first air inlet) is set to the pressure set value of the first pilot valve, the first valve core is opened, and the second air inlet is communicated with the first air outlet.
The self-operated regulating valve comprises a fifth chamber, a sixth chamber and a third valve rod penetrating through the fifth chamber and the sixth chamber, wherein the fifth chamber is provided with a third spring and a third diaphragm, one end of the third spring is connected with the fifth chamber, the other end of the third spring is connected with the third valve rod, the third diaphragm is connected with the third valve rod, a third valve core is arranged in the sixth chamber, and the third valve rod is positioned at one end of the sixth chamber and connected with the third valve core.
The sixth cavity is communicated with the valve body extension pipeline, the third valve core stretches into the valve body extension pipeline, the self-operated regulating valve is located at an opening position, the third spring drives the third valve rod to drive the third valve core to move downwards, the valve body extension pipeline is located at the position where the two sides of the self-operated regulating valve are mutually communicated, the self-operated regulating valve is located at a closing position, the third diaphragm drives the third valve rod to drive the third valve core to move upwards, and the valve body extension pipeline is located at the position where the two sides of the self-operated regulating valve are disconnected.
The original self-operated valve has only one pilot valve, and the valve action point is unique. For example, the design value is 7 kg, when the pipeline pressure is lower than 7 kg, the valve is opened, and when the pipeline pressure is higher than 7 kg, the valve is closed. Because the valve is connected in the production pipeline, the air source pressure fluctuates at 7 kg, so that the valve is always in a switching state, and the valve is caused to surge.
In the embodiment, the pressure of P1 does not affect production under the condition of 7 to 6.8Kg, the pressure of P2 is 7 Kg under the normal working condition, the set pressure of Ps1 is 6.7 Kg, and the valve 1 with P2 > Ps1 is in a closed state. This ensures that the gas is not output to atmosphere through the valve 1. Ps2 is set to be 6.9 kg, P2 is more than Ps2, the second pilot valve is opened, medium gas enters through the fourth air inlet of the second pilot valve, the medium gas is input into the self-operated regulating valve from the second air outlet through the valve port, and when the P2 pressure is larger, the third valve is closed more tightly.
Conversely, when the pressure P1 is reduced from 7kg to below 6.8 kg, P2 is smaller than Ps2, the second pilot valve is closed, the air source cannot supplement air through the second pilot valve, P2 is larger than Ps1, the first pilot valve is still in a closed state, air in the self-operated regulating valve cannot be exhausted through the first pilot valve, the valve is in a pressure shortage state, and at the moment, the self-operated regulating valve does not act. When the pressure of P2 is continuously reduced to below 6.7 kg, P1 is smaller than Ps1, the first pilot valve is opened, the second air inlet is communicated with the first air outlet, air in the self-operated regulating valve is completely exhausted, the third valve core is opened under the acting force of the third spring, and the pressure is fully supplemented.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. The utility model provides a two guide's pressure self-operated control valve, is including being equipped with the valve body extension pipeline that gets the pressure mouth, locates valve body extension pipeline's self-operated control valve, its characterized in that: the valve body extension pipeline is provided with a first pilot valve which keeps a normally open state and a second pilot valve which keeps a normally closed state, the second pilot valve comprises a third air inlet, a fourth air inlet and a second air outlet, the third air inlet is communicated with the pressure taking port, the fourth air inlet is communicated with the second air outlet when the pressure of the pressure taking port is larger than the pressure set value of the second pilot valve, the fourth air inlet is communicated with the pressure taking port to intake air to the second pilot valve, the second air outlet is communicated with the valve port of the self-operated regulating valve to control the opening and closing of the self-operated regulating valve, the first pilot valve comprises a first air inlet, a second air inlet and a first air outlet, the first air inlet is communicated with the pressure taking port, the second air inlet is disconnected from the first air outlet when the pressure of the pressure taking port is larger than the pressure set value of the first pilot valve, the second air inlet is communicated with a valve port of the self-operated regulating valve, the first air outlet is connected with the atmosphere to discharge pressure, a pressure set value of the first pilot valve is smaller than a pressure set value of the second pilot valve, the first pilot valve comprises a first chamber, a second chamber and a first valve rod penetrating through the first chamber and the second chamber, a first spring and a first diaphragm are arranged in the first chamber, one end of the first spring is connected with the first chamber, the other end of the first spring is connected with the first valve rod, the first diaphragm is connected with the first valve rod, a first valve core is arranged in the second chamber, one end of the first valve rod positioned in the second chamber is connected with the first valve core, the first air inlet is arranged below the first diaphragm in the first chamber, the second air inlet and the first air outlet are arranged at two sides of the first valve core in the second cavity, the first pilot valve is positioned at an opening position, the first spring drives the first valve rod to drive the first valve core to move downwards, the second air inlet is communicated with the first air outlet, the first pilot valve is positioned at a closing position, the first diaphragm drives the first valve rod to drive the first valve core to move upwards, the second air inlet is disconnected with the first air outlet, the second pilot valve comprises a third cavity, a fourth cavity and a second valve rod penetrating through the third cavity and the fourth cavity, a second spring and a second diaphragm are arranged in the third cavity, one end of the second spring is connected with the third cavity, the other end of the second spring is connected with the second valve rod, the second diaphragm is connected with the second valve rod, a second valve core is arranged in the fourth chamber, one end of the second valve rod positioned in the fourth chamber is connected with the second valve core, the third air inlet is arranged below the second diaphragm in the third chamber, the fourth air inlet and the second air outlet are arranged on two sides of the second valve core in the fourth chamber, the second pilot valve is positioned at a closing position, the second spring drives the second valve rod to drive the second valve core to move downwards, the fourth air inlet and the second air outlet are disconnected, the second pilot valve is positioned at an opening position, the second diaphragm drives the second valve rod to drive the second valve core to move upwards, the fourth air inlet and the second air outlet are communicated, the self-operated regulating valve comprises a fifth chamber, a sixth chamber and a third valve rod penetrating through the fifth chamber and the sixth chamber, the third valve rod is arranged in the sixth chamber, one end of the third valve rod is positioned in the sixth chamber and connected with the third valve core.
2. The dual pilot pressure self-regulating valve of claim 1, wherein: the sixth cavity is communicated with the valve body extension pipeline, the third valve core stretches into the valve body extension pipeline, the self-operated regulating valve is located at an opening position, the third spring drives the third valve rod to drive the third valve core to move downwards, the valve body extension pipeline is located at the position where the two sides of the self-operated regulating valve are mutually communicated, the self-operated regulating valve is located at a closing position, the third diaphragm drives the third valve rod to drive the third valve core to move upwards, and the valve body extension pipeline is located at the position where the two sides of the self-operated regulating valve are disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910452706.4A CN110067881B (en) | 2019-05-28 | 2019-05-28 | Double-pilot pressure self-operated regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910452706.4A CN110067881B (en) | 2019-05-28 | 2019-05-28 | Double-pilot pressure self-operated regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110067881A CN110067881A (en) | 2019-07-30 |
| CN110067881B true CN110067881B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910452706.4A Active CN110067881B (en) | 2019-05-28 | 2019-05-28 | Double-pilot pressure self-operated regulating valve |
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| Country | Link |
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| CN (1) | CN110067881B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200388668Y1 (en) * | 2005-03-02 | 2005-07-01 | 조찬동 | shut-off valve and pressure reducing valve |
| CN201628005U (en) * | 2010-03-09 | 2010-11-10 | 宁波华成阀门有限公司 | Pilot operated antifouling electromagnetic valve |
| CN103711959A (en) * | 2012-10-01 | 2014-04-09 | 艾默生过程管理调节技术公司 | Pilot-operated regulator with balanced port |
| CN205226564U (en) * | 2015-12-23 | 2016-05-11 | 古棠测控科技（上海）有限公司 | Guide's structure and high -pressure valve |
| CN205260357U (en) * | 2015-11-11 | 2016-05-25 | 广州能动机械制造有限公司 | Centrifugal pump outlet valve |
| CN206246768U (en) * | 2016-12-13 | 2017-06-13 | 广州新星阀门实业有限公司 | A kind of diaphragm pressure reduction valve |
| CN210423868U (en) * | 2019-05-28 | 2020-04-28 | 宁波世纪恒祥自控技术有限公司 | Double-pilot pressure self-regulating valve |
-
2019
- 2019-05-28 CN CN201910452706.4A patent/CN110067881B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200388668Y1 (en) * | 2005-03-02 | 2005-07-01 | 조찬동 | shut-off valve and pressure reducing valve |
| CN201628005U (en) * | 2010-03-09 | 2010-11-10 | 宁波华成阀门有限公司 | Pilot operated antifouling electromagnetic valve |
| CN103711959A (en) * | 2012-10-01 | 2014-04-09 | 艾默生过程管理调节技术公司 | Pilot-operated regulator with balanced port |
| CN205260357U (en) * | 2015-11-11 | 2016-05-25 | 广州能动机械制造有限公司 | Centrifugal pump outlet valve |
| CN205226564U (en) * | 2015-12-23 | 2016-05-11 | 古棠测控科技（上海）有限公司 | Guide's structure and high -pressure valve |
| CN206246768U (en) * | 2016-12-13 | 2017-06-13 | 广州新星阀门实业有限公司 | A kind of diaphragm pressure reduction valve |
| CN210423868U (en) * | 2019-05-28 | 2020-04-28 | 宁波世纪恒祥自控技术有限公司 | Double-pilot pressure self-regulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110067881A (en) | 2019-07-30 |
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