CN116255467A - Double-cutoff forced sealing valve and control method thereof - Google Patents
Double-cutoff forced sealing valve and control method thereof Download PDFInfo
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- CN116255467A CN116255467A CN202310520137.9A CN202310520137A CN116255467A CN 116255467 A CN116255467 A CN 116255467A CN 202310520137 A CN202310520137 A CN 202310520137A CN 116255467 A CN116255467 A CN 116255467A
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- 238000007789 sealing Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 34
- 238000011144 upstream manufacturing Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 3
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- 230000033001 locomotion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/12—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
-
- 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
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
- F16K27/047—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members with wedge-shaped obturating members
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Safety Valves (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention relates to a double-cutoff forced sealing valve and a control method thereof, wherein the double-cutoff forced sealing valve is provided with a middle cavity automatic discharging system; the double-cutoff forced sealing valve comprises a valve cover, a valve rod, a supporting valve core, a valve plate, a valve seat sealing ring, a valve body and an end cover; the middle cavity automatic discharging system consists of a first pipe joint, a first communication pipe, a first clamping sleeve angle type needle valve, a second clamping sleeve angle type needle valve, a leakage detection pipe, a second communication pipe, a third communication pipe, a clamping sleeve type one-way valve, a four-way valve, a fourth communication pipe, a second pipe joint and a pressure gauge; the automatic relief system for the middle cavity can realize automatic pressure relief after the middle cavity of the valve is overpressured and can observe the overpressure pressure, so that technicians can process the overpressure in time, and the safe operation of the double-cutoff forced sealing valve is ensured.
Description
Technical Field
The invention belongs to the field of hydraulic valves, and particularly relates to a double-cutoff forced sealing valve and a control method thereof.
Background
The double-cutoff forced sealing valve (usually provided with a forced sealing plug valve, a forced sealing flat gate valve and the like) has a double-cutoff function, and under the thrust of an actuator, an upper valve plate and a lower valve plate of the valve cavity are simultaneously and forcedly sealed with the valve body, and media are forcedly cut off, so that the upper valve plate and the lower valve plate simultaneously have a sealing function. At this time, if the temperature of the valve cavity increases, the medium accumulated in the valve cavity cannot be released because the valve cavity is in a closed space, which may cause damage to the sealing of the valve body and even cracking of the valve body, especially for a liquid medium which is almost incompressible, and there is a great safety risk.
In the prior art, a bypass pipe and a bypass cut-off valve are arranged on a main valve to realize pressure release. In the above scheme, there are the following significant drawbacks:
1. after the valve is installed and used, if the bypass cut-off valve is opened, the sealing of the main valve can only realize the sealing of the downstream valve plate, and the upstream valve plate loses the sealing effect.
2. After the valve is installed and used, if the bypass cut-off valve is closed, the pressure release after the valve cavity pressure is over-pressure cannot be realized, and potential safety hazards exist.
3. Under the condition of valve pressure, sampling of valve cavity media cannot be realized.
4. The structure can not realize automatic pressure relief after the valve cavity is over-pressurized.
In view of the above-mentioned drawbacks of the prior art, there is a need to provide a double-cutoff forced sealing valve to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a double-cutoff forced sealing valve and a control method thereof, which are used for solving the technical problems in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
a double cutoff forced sealing valve having a medium chamber automatic bleed system; the double-cutoff forced sealing valve comprises a valve cover, a valve rod, a supporting valve core, a valve plate, a valve seat sealing ring, a valve body and an end cover; the valve body is characterized in that the valve cover and the end cover are respectively fixedly arranged on the upper side and the lower side of the valve body, one end of the valve rod penetrates through the valve cover and is in transmission connection with the opening valve core, the other end of the valve rod is in transmission connection with the actuator, and the lower side of the opening valve core is in rotary connection with the end cover; the valve seat sealing ring is arranged on the valve plate, one surface of the valve plate is contacted with the valve body, and the other surface of the valve plate has a designated inclination and is in sliding fit with the opening valve core;
the middle cavity automatic discharging system consists of a first pipe joint, a first communication pipe, a first clamping sleeve angle type needle valve, a second clamping sleeve angle type needle valve, a leakage detection pipe, a second communication pipe, a third communication pipe, a clamping sleeve type one-way valve, a four-way valve, a fourth communication pipe, a second pipe joint and a pressure gauge;
the right end of the first pipe joint is provided with pipe threads and is in threaded connection with a valve body of the double-cutoff forced sealing valve, and the left end of the first pipe joint is connected with the first communication pipe through a clamping sleeve; the left end of the first communicating pipe is connected with the right end port of the first cutting ferrule angle type needle valve, and the lower end port of the first cutting ferrule angle type needle valve is connected with the second communicating pipe;
the right end of the second pipe joint is provided with pipe threads and is in threaded connection with the valve body, the left end of the second pipe joint is connected with the fourth communicating pipe through a clamping sleeve, the left end of the fourth communicating pipe is connected with a right end port of the four-way valve, the other three ports of the four-way valve are respectively connected with the clamping sleeve type one-way valve, the third communicating pipe and the pressure gauge, the lower end of the clamping sleeve type one-way valve is connected with the second communicating pipe, and the clamping sleeve type one-way valve is communicated in the direction from the four-way valve to the second communicating pipe;
one port of the second cutting ferrule angle type needle valve is connected with the third communicating pipe, and the other port of the second cutting ferrule angle type needle valve is connected with the leakage detecting pipe.
Preferably, the first pipe joint is connected with the upstream end or the downstream end of the double-cutoff forced sealing valve, and the second pipe joint is connected with the valve middle cavity of the double-cutoff forced sealing valve.
Preferably, the first cartridge angle needle valve is provided with a first operator for opening or closing the first cartridge angle needle valve; the second cutting sleeve angle type needle valve is provided with a second operator, and the second operator is used for opening or closing the second cutting sleeve angle type needle valve; wherein the first and second operators may be both automatically operated or manually operated.
Preferably, the automatic cavity venting system further comprises a control device for controlling the actuation of the actuator, the first manipulator and the second manipulator.
Preferably, the automatic medium cavity discharging system is further provided with a first sensor, a second sensor, a third sensor and an alarm device, and the control device is respectively in communication connection with the first sensor, the second sensor, the third sensor and the alarm device; the first sensor is used for detecting the pressure in the four-way valve; the second sensor is used for detecting the liquid medium existing in the leakage detection pipe; the third sensor is used for detecting the liquid medium in the first communication pipe; the control device receives detection signals of the first sensor, the second sensor and the third sensor and controls the alarm device to work according to the detection signals.
Preferably, the clamping sleeve type one-way valve comprises a one-way valve body, a one-way valve core arranged in the one-way valve body, and a return spring with one end propped against the one-way valve core is arranged in the one-way valve body; the valve core of the one-way valve is provided with a first groove, a sealing ring is arranged in the first groove, the valve core of the one-way valve is also provided with a second groove, and an iron core is arranged in the second groove; and a solenoid is arranged outside the check valve body and used for driving the iron core to reciprocate.
Preferably, the alarm device is provided with a display, and the alarm device can send out an audible and visual alarm signal, and simultaneously display the fault or abnormality existing in the double-cutoff forced sealing valve in a text mode by utilizing the display.
A control method for a double cutoff forced sealing valve comprising the steps of:
step one: when the valve works normally, the control device controls the first manipulator and the second manipulator to act so as to close the first cutting sleeve angle type needle valve and the second cutting sleeve angle type needle valve; when the control device controls the executor to close the double-cutoff forced sealing valve, the control device receives the pressure value in the four-way valve detected by the first sensor in real time, and when the pressure value is larger than a first threshold value, the control device controls the alarm device to be in a first working mode; simultaneously, the control device controls the first manipulator to act so as to open the first cutting sleeve angle type needle valve for automatic pressure relief;
step two: when the pressure of the valve middle cavity is normal, the control device controls the first operator and the second operator to act so as to close the first cutting sleeve angle type needle valve and open the second cutting sleeve angle type needle valve; the control device receives the detection signal of the second sensor in real time to judge whether a liquid medium exists in the leak detection pipe, and if the liquid medium exists in the leak detection pipe, the alarm device is controlled to be in a third working mode; otherwise, executing the third step;
step three: the control device controls the first manipulator to act so as to open the first cutting sleeve angle type needle valve; the control device receives the detection signal of the second sensor in real time to judge whether a liquid medium exists in the leak detection pipe, and if the liquid medium exists in the leak detection pipe, the control device is controlled to be in a fourth working mode; otherwise, the alarm device is controlled to be in a fifth working mode.
Preferably, after automatic pressure relief is started, when the pressure value received by the control device in real time is lower than the first threshold value, executing the second step; when the pressure value received by the control device in real time is continuously increased and is larger than a second threshold value, the alarm device is controlled to be in a second working mode, and when the pressure value received in real time is lower than the first threshold value, the second step is executed; wherein,,
the first working mode is that the alarm device displays red alarm light;
the second working mode is that the alarm device displays flashing red alarm light, gives out alarm sound, and simultaneously controls the alarm device to display the 'cutting sleeve type check valve function fault, please process in time';
the third working mode is that the alarm device displays 'upstream and downstream valve plate sealing faults, and timely maintenance is required';
the fourth working mode is that the alarm device displays the 'clamping sleeve type check valve sealing failure, and timely maintenance is required';
and the fifth working mode is that the alarm device displays that the valve state is good.
Preferably, after the control device controls the alarm device to be in the second operation mode, the method further comprises: the control device controls the solenoid to be electrified so as to drive the check valve core to rapidly reciprocate for a plurality of times in a short time.
Compared with the prior art, the double-cutoff forced sealing valve and the control method thereof provided by the invention have the following beneficial technical effects:
1. the double-cutoff forced sealing valve provided by the invention is provided with a highly integrated middle cavity automatic relief system, and by utilizing the middle cavity automatic relief system, the pressure relief can be automatically carried out after the middle cavity of the valve is overpressured, and the overpressure pressure can be observed, so that technicians can timely process the valve, and the safe operation of the valve is ensured.
2. When the double-cutoff forced sealing valve is in a closed state, the transported liquid medium can be sampled through the sampling port of the middle cavity automatic discharging system, so that technicians can know the quality of the transported liquid medium in time, and the quality of the liquid medium can be analyzed conveniently.
3. The control device of the automatic medium-cavity discharging system can automatically monitor whether the sealing performance and the function of the double-cutoff forced sealing valve are normal or not, and control the alarm device to make different alarm actions according to different monitoring results so as to facilitate a technician to overhaul the double-cutoff forced sealing valve in time.
4. According to the control method provided by the invention, automatic release can be realized when the pressure value of the valve middle cavity of the double-cutoff forced sealing valve is larger than the first threshold value, and the safety of the valve is ensured. If the pressure value of the middle cavity of the valve is continuously increased and is larger than a second threshold value, the functional failure of the clamping sleeve type one-way valve can be automatically checked, and the normal operation of the valve is ensured.
5. According to the control method provided by the invention, after the double-cutoff forced sealing valve finishes normal pressure relief, whether the sealing performance of the upstream valve plate and the downstream valve plate of the double-cutoff forced sealing valve and the sealing performance of the clamping sleeve type one-way valve are normal can be simply and effectively determined, so that a technician can conveniently know the faults or anomalies of the double-cutoff forced sealing valve in time, and the double-cutoff forced sealing valve can be overhauled in time.
Drawings
FIG. 1 is a schematic diagram of a double cutoff positive seal valve according to the present invention;
FIG. 2 is a schematic diagram of the automatic cavity bleed system of the present invention;
FIG. 3 is a general schematic of a double cutoff positive seal valve of the present invention;
fig. 4 is a schematic structural view of a sleeve-type check valve according to the present invention.
Wherein the reference symbols in the figures have the following meanings:
1. a medium cavity automatic relief system; 2. a plug; 3. a double cutoff forced seal valve; 11. a first pipe joint; 12. a first communication pipe; 13. a first ferrule angle needle valve; 14. a second ferrule angle needle valve; 15. a leak detection pipe; 16. a second communicating pipe; 17. a third communicating pipe; 18. a sleeve-type one-way valve; 19. a four-way valve; 20. a fourth communicating pipe; 21. a second pipe joint; 131. a first operator; 141. a second operator; 191. a pressure gauge; 181. a check valve body; 182. a check valve core; 183. a seal ring; 184. a return spring; 185. an iron core; 186. a solenoid; 31. a valve cover; 32. a valve stem; 33. opening the valve core; 34. a valve plate; 35. a valve seat seal ring; 36. a valve body; 37. an end cap; 361. an upstream valve chamber; 362. a valve middle cavity; 363. downstream valve chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of some embodiments of the 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.
It should be noted that, under the condition of no conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the terms "upper", "lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, or an azimuth or a positional relationship conventionally understood by those skilled in the art, such terms are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1 to 3, the present invention provides a double-cutoff forced sealing valve 3, the double-cutoff forced sealing valve 3 is provided with a middle cavity automatic discharging system 1, and further comprises a valve cover 31, a valve rod 32, a supporting valve core 33, a valve plate 34, a valve seat sealing ring 35, a valve body 36 and an end cover 37; the upper side and the lower side of the valve body 36 are respectively fixedly provided with a valve cover 31 and an end cover 37, one end of the valve rod 32 penetrates through the valve cover 31 and is in transmission connection with the expanding valve core 33, the other end of the valve rod 32 is in transmission connection with the actuator, and the lower side of the expanding valve core 33 is in rotation connection with the end cover 37; the valve seat seal 35 is mounted on the valve plate 34, one face of the valve plate 34 is in contact with the valve body 36, and the other face has a certain inclination and is in sliding fit with the valve core 33.
When the valve is in a closed state, the valve rod 32 is pushed downwards by the thrust provided by the actuator, the valve plate 34 and the expanding valve core 33 have a certain inclination, and the larger the thrust provided by the actuator downwards, the larger the acting force of the expanding valve core 33 on the valve plate 34, the larger the sealing pretightening force provided by the valve seat sealing ring 35 between the valve plate 34 and the valve body 36, and the better the sealing effect. At this time, the end cover 37 is arranged at the lower part of the whole valve cavity of the double-cutoff forced sealing valve, the valve cover 31 is arranged at the upper part, the valve plates 34 are arranged at the left and right sides, the middle cavity of the valve forms a closed area and is forced to be closed by the thrust of an actuator, and at this time, the safety use of the valve is ensured by installing the middle cavity automatic discharging system 1 provided by the invention.
The middle cavity automatic discharging system 1 consists of a first pipe joint 11, a first communication pipe 12, a first clamping sleeve angle type needle valve 13, a second clamping sleeve angle type needle valve 14, a leakage detection pipe 15, a second communication pipe 16, a third communication pipe 17, a clamping sleeve type check valve 18, a four-way valve 19, a fourth communication pipe 20, a second pipe joint 21, a pressure gauge 191 and the like;
the right end of the first pipe joint 11 is provided with pipe threads and is in threaded connection with a valve body of the double-cutoff forced sealing valve, and the left end of the first pipe joint is connected with the first communication pipe 12 through a clamping sleeve; the left end of the first communication pipe 12 is connected with the right end port of the first cutting ferrule angle type needle valve 13, and the lower end port of the first cutting ferrule angle type needle valve 13 is connected with the second communication pipe 16.
The right end of the second pipe joint 21 is provided with pipe threads and is in threaded connection with the valve body, the left end of the second pipe joint is connected with the fourth communicating pipe 20 through a clamping sleeve, the left end of the fourth communicating pipe 20 is connected with a right end port of the four-way valve 19, the other three ports of the four-way valve 19 are respectively connected with the clamping sleeve type check valve 18, the third communicating pipe 17 and the pressure gauge 191, the lower end of the clamping sleeve type check valve 18 is connected with the second communicating pipe 16, and the clamping sleeve type check valve 18 is communicated in the direction from the four-way valve 19 to the second communicating pipe 16.
One port of the second sleeve angle needle valve 14 is connected with a third communicating pipe 17, and the other port of the second sleeve angle needle valve 14 is connected with a leak detection pipe 15.
On the valve body of the double cutoff forced seal valve, threaded relief holes are provided corresponding to the positions of the upstream valve cavity 361, the valve middle cavity 362 and the downstream valve cavity 363. The first pipe joint 11 of the middle cavity automatic relief system is connected with a threaded relief hole at an upstream valve cavity 361, the second pipe joint 21 is connected with a threaded relief hole at a valve middle cavity 362, and the threaded relief hole at a downstream valve cavity 363 is plugged by a plug 2.
When in use, the second cutting ferrule angle needle valve 14 is closed, the first cutting ferrule angle needle valve 13 is opened, at the moment, the pressure value of the valve middle cavity 362 can be observed through the pressure gauge 191, and when the pressure of the valve middle cavity 362 exceeds the pressure of the pressure relief end and reaches the relief pressure of the middle cavity automatic relief system 1, the liquid medium in the valve middle cavity 362 can be automatically relieved to the pressure relief end through the cutting ferrule type one-way valve 18. And when the liquid medium at the upstream end of the valve reaches the check valve 18 through the second communication pipe 16, the check valve 18 cuts off the medium, preventing the liquid medium from reaching the valve cavity 362.
Preferably, when the valve is in a closed state, the first cutting sleeve angle type needle valve 13 can be closed, the second cutting sleeve angle type needle valve 14 is opened, the sealing performance of the upstream valve plate 34 and the downstream valve plate 34 of the valve is detected through the leakage detection pipe 15, and if the liquid medium is detected in the leakage detection pipe 15, the sealing leakage of the valve plate 34 is indicated. At the same time, the transported liquid medium can also be sampled via the leak detection pipe 15 for subsequent medium sampling analysis.
Preferably, the first corner-sleeve needle valve 13 is provided with a first operator 131, the first operator 131 being for opening or closing the first corner-sleeve needle valve 13; the second card sleeve angle needle valve 14 is provided with a second operator 141, and the second operator 141 is used for opening or closing the second card sleeve angle needle valve 14; wherein, the first operator 131 and the second operator 141 may be both automatically operated or manually operated.
The invention provides a double-cutoff forced sealing valve which is provided with a high-integration middle cavity automatic relief system with a simple structure, can realize automatic pressure relief after the middle cavity of the valve is overpressured and can observe the overpressure pressure, so that technicians can overhaul the valve in time, and the safe operation of the valve is ensured. Meanwhile, the valve plate can also detect the sealing performance of the valve plate when the valve is in a closed state, and leak detection and medium sampling are performed through a sampling port of the middle cavity automatic discharging system.
Preferably, the automatic hollow space venting system 1 further comprises a control device for controlling the actuation of the actuator, the first manipulator 131 and the second manipulator 141.
Preferably, the automatic middle cavity bleeding system 1 is further provided with a first sensor, a second sensor, a third sensor and an alarm device, and the control device is respectively in communication connection with the first sensor, the second sensor, the third sensor and the alarm device; the first sensor is used for detecting the pressure in the four-way valve 19; the second sensor is used for detecting the medium existing in the leakage detection pipe 15; the third sensor is used for detecting the medium present in the first communication pipe 12; the control device receives detection signals of the first sensor, the second sensor and the third sensor and controls the alarm device to work according to the detection signals. The alarm device can send out an audible and visual alarm signal to prompt technicians of faults or anomalies of the current double-cutoff forced sealing valve.
Preferably, the alarm device is provided with a display, and the alarm device can send out an audible and visual alarm signal, and simultaneously display the fault or abnormality existing in the current double-cutoff forced sealing valve in a text mode by using the display.
Preferably, the alarm device is a terminal device with a remote communication function and can send out an audible and visual alarm signal to prompt a technician that the current double-cutoff forced sealing valve has a fault or abnormality.
According to the preferred embodiment, the automatic medium-cavity discharging system can also automatically monitor whether each sealing performance and function of the double-cutoff forced sealing valve are normal or not, and control the alarm device to make different alarm actions according to different monitoring results so as to enable technicians to overhaul the double-cutoff forced sealing valve in time.
Example two
The invention also provides a control method for the double-cutoff forced sealing valve, and according to the control method, whether each sealing performance and function of the double-cutoff forced sealing valve are normal can be monitored. The control method comprises the following steps:
step one: when the valve works normally, the control device controls the first manipulator 131 and the second manipulator 141 to act so as to close the first clamping sleeve angle type needle valve 13 and the second clamping sleeve angle type needle valve 14; when the control device controls the actuator to close the double-cutoff forced sealing valve, the control device receives the pressure value in the four-way valve 19 detected by the first sensor in real time, and when the pressure value is larger than a first threshold value, the valve is in overpressure in the middle cavity, and the control alarm device is in a first working mode; at the same time, the control device controls the first operator 131 to act so as to open the first cutting ferrule angle needle valve 13 for automatic pressure relief.
In the first step, after the double-cutoff forced sealing valve is closed, the cavity in the valve is pressurized. The working state of the valve middle cavity can be judged according to the detection value of the first sensor, when the pressure value of the valve middle cavity is judged to be larger than the first threshold value, the overpressure of the valve middle cavity is indicated at the moment, and the working state of the valve is timely noticed by a worker through controlling the alarm device to be in the first working mode. Meanwhile, the control device opens the first clamping sleeve angle type needle valve 13 and closes the second clamping sleeve angle type needle valve 14, so that the automatic medium cavity discharging system is in a discharging working condition. At this time, the liquid medium flow path is: valve middle cavity, four-way valve 19, clamping sleeve type one-way valve 18, first clamping sleeve type needle valve 13 and upstream end.
Preferably, after automatic pressure relief is started, the pressure value in the four-way valve 19 detected by the first sensor is received in real time, and if the pressure value in the four-way valve 19 is lower than a first threshold value, the valve cavity pressure is normal, and the step two is started.
Preferably, after automatic pressure relief is started, the pressure value in the four-way valve 19 detected by the first sensor is received in real time, if the pressure value in the four-way valve 19 is detected not to be reduced, but is continuously increased and is larger than the second threshold value, the situation is usually that the valve core of the clamping sleeve type one-way valve is not effectively pushed away due to misplacement, so that the automatic medium cavity relief system does not work normally. At this time, the alarm device is controlled to be in the second operation mode. After the functional failure problem of the clamping sleeve type one-way valve is solved, the pressure value in the four-way valve 19 detected by the first sensor is received in real time, and when the pressure value in the four-way valve 19 is lower than a first threshold value, the normal pressure of a cavity in the valve is indicated, and then the step two is carried out.
Preferably, the first working mode is that the alarm device displays red alarm light.
Preferably, the second working mode is that the alarm device displays flashing red alarm light and gives out alarm sound. Meanwhile, the control device also controls the alarm device to display the 'cutting sleeve type one-way valve function failure, please deal with in time'.
When the pressure value detected in the first step is larger than the first threshold, the overpressure of the middle cavity of the valve is indicated, and the red warning light is displayed by controlling the warning device so as to remind a worker of timely focusing on the working state of the valve. Subsequently, the second sleeve angle needle valve 14 is closed by opening the first sleeve angle needle valve 13, so that the automatic relief system of the middle cavity is in an automatic relief working condition. However, if the pressure value is not detected to be reduced, but is continuously increased and is larger than the second threshold value, the pressure value is usually not effectively pushed away due to the dislocation of the valve core of the clamping sleeve type one-way valve, so that the automatic relief system of the middle cavity does not work normally, and the safe operation of the valve is seriously affected. Therefore, the flashing red warning light is displayed by controlling the warning device, and warning sound is emitted to remind technicians of the valve failure. Meanwhile, the alarm device is controlled to display the 'cutting sleeve type check valve function fault, please deal with in time', so as to prompt technicians to overhaul in time.
In order to solve the problem that the valve core of the clamping sleeve type one-way valve is misplaced and is not effectively pushed away, and therefore the automatic medium cavity discharging system cannot work normally. As shown in fig. 4, the sleeve-type check valve 18 provided by the invention comprises a check valve body 181, a check valve core 182 arranged in the check valve body 181, and a return spring 184 with one end abutting against the check valve core 182 arranged in the check valve body 181; the check valve spool 182 is provided with a first groove, a sealing ring 183 is arranged in the first groove, the sealing ring 183 is in sealing contact with the check valve body 181, the check valve spool 182 is also provided with a second groove, and an iron core 185 is arranged in the second groove; a solenoid 186 is provided outside the check valve body 181, and the solenoid 186 is used to drive the plunger 185 to reciprocate.
According to the embodiment, when the pressure value received by the control device is larger than the second threshold value, it is determined that the clamping sleeve type one-way valve has functional failure. Therefore, the iron core 185 is fixedly arranged on the check valve core 182 and drives the iron core 185 to reciprocate, so that the check valve core 182 can rapidly reciprocate for a plurality of times in a short time, the problem that the valve core of the clamping sleeve type check valve is not effectively pushed open can be effectively solved, and the automatic relief function of the middle cavity relief system can be realized.
To achieve the reciprocating movement of the check valve core 182, a control device may be used to control the solenoid 186 to generate a current in one direction (e.g., clockwise), where a magnetic force is applied to the core 185, so that the core 185 moves in one direction and further drives the check valve core 182 to move; subsequently, a current (e.g., counter-clockwise) is generated in the control solenoid 186 to move the plunger 185 in the opposite direction and further to move the check valve plunger 182 in the opposite direction. Thus, by continuously controlling the change in direction of the current in the solenoid 186, the reciprocating motion of the check valve spool 182 in the axial direction is achieved. Of course, the on-off of the current in the solenoid 186 can be continuously controlled, and the reciprocating motion of the check valve core 182 along the axial direction can be realized by matching with the reset force of the reset spring 184.
Step two: when the pressure of the valve middle cavity is normal, the control device controls the first manipulator 131 and the second manipulator 141 to act so as to close the first cutting sleeve angle needle valve 13 and open the second cutting sleeve angle needle valve 14; the control device receives the detection signal of the second sensor in real time to judge whether the liquid medium exists in the leakage detection pipe 15, and if the liquid medium exists in the leakage detection pipe 15, the alarm device is controlled to be in a third working mode; otherwise, executing the third step;
after the overpressure relief of the valve middle cavity is completed, checking whether each sealing performance and each function of the double-cutoff forced sealing valve are normal or not. Thus, in step two, the first ferrule angle needle valve 13 is closed and the second ferrule angle needle valve 14 is opened. At this time, the liquid medium flow path is: the upstream end of the valve is pressurized, liquid medium enters the valve middle cavity, the four-way valve 19, the second clamping sleeve angle needle valve 14 and the leakage detecting pipe 15. If the liquid medium exists in the leak detection pipe 15, the problem of sealing of the upstream valve plate and the downstream valve plate is indicated, and the alarm device is controlled to be in a third working mode; if no liquid medium is present, it is indicated that the sealing performance of the upstream and downstream valve plates is normal.
Preferably, the third working mode is to display 'upstream and downstream valve plate sealing faults, please repair in time' for the alarm device;
step three: the control device controls the first operator 131 to act so as to open the first cutting ferrule angle type needle valve 13; the control device receives the detection signal of the second sensor in real time to judge whether the liquid medium exists in the leakage detection pipe 15, and if the liquid medium exists in the leakage detection pipe 15, the alarm device is controlled to be in a fourth working mode; otherwise, the alarm device is controlled to be in a fifth working mode.
In step three, by opening the first ferrule angle needle valve 13 and opening the second ferrule angle needle valve 14, the upstream end of the valve is pressurized, and the flow path of the liquid medium is as follows: liquid medium enters the upstream end, the first cutting sleeve angle type needle valve 13, the four-way valve 19, the second cutting sleeve angle type needle valve 14 and the leakage detection pipe 15. If the liquid medium exists in the leak detection pipe 15, the problem of sealing of the clamping sleeve type check valve 18 is indicated, and the alarm device is controlled to be in a fourth working mode; if no liquid medium exists, the sealing performance of the sleeve type one-way valve 18 is normal, namely, all sealing performances and functions of the double-cutoff forced sealing valve are normal, and the alarm device is controlled to be in a fifth working mode.
Preferably, the fourth working mode is that the alarm device displays the 'cutting sleeve type check valve sealing failure, please repair in time'; the fifth mode of operation indicates to the alarm device that the valve condition is good.
According to the control method provided by the invention, automatic relief can be realized when the double-cutoff forced sealing valve is overpressured, whether the sealing performance of the upstream valve plate and the downstream valve plate of the double-cutoff forced sealing valve and the sealing performance and the function of the clamping sleeve type one-way valve are normal can be simply and effectively determined, and when the automatic relief function is abnormal, automatic investigation treatment can be performed, so that the safe and effective operation of the double-cutoff forced sealing valve can be effectively ensured.
The above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail in the present specification with reference to the above embodiments, the present invention is not limited to the above specific embodiments, and thus any modifications or equivalent substitutions are made to the present invention; all technical solutions and modifications thereof that do not depart from the spirit and scope of the invention are intended to be included in the scope of the appended claims.
Claims (10)
1. The utility model provides a two forced seal valves that cut off which characterized in that: the double-cutoff forced sealing valve is provided with a middle cavity automatic discharging system; the double-cutoff forced sealing valve comprises a valve cover, a valve rod, a supporting valve core, a valve plate, a valve seat sealing ring, a valve body and an end cover; the valve body is characterized in that the valve cover and the end cover are respectively fixedly arranged on the upper side and the lower side of the valve body, one end of the valve rod penetrates through the valve cover and is in transmission connection with the opening valve core, the other end of the valve rod is in transmission connection with the actuator, and the lower side of the opening valve core is in rotary connection with the end cover; the valve seat sealing ring is arranged on the valve plate, one surface of the valve plate is contacted with the valve body, and the other surface of the valve plate has a designated inclination and is in sliding fit with the opening valve core;
the middle cavity automatic discharging system consists of a first pipe joint, a first communication pipe, a first clamping sleeve angle type needle valve, a second clamping sleeve angle type needle valve, a leakage detection pipe, a second communication pipe, a third communication pipe, a clamping sleeve type one-way valve, a four-way valve, a fourth communication pipe, a second pipe joint and a pressure gauge;
the right end of the first pipe joint is provided with pipe threads and is in threaded connection with a valve body of the double-cutoff forced sealing valve, and the left end of the first pipe joint is connected with the first communication pipe through a clamping sleeve; the left end of the first communicating pipe is connected with the right end port of the first cutting ferrule angle type needle valve, and the lower end port of the first cutting ferrule angle type needle valve is connected with the second communicating pipe;
the right end of the second pipe joint is provided with pipe threads and is in threaded connection with the valve body, the left end of the second pipe joint is connected with the fourth communicating pipe through a clamping sleeve, the left end of the fourth communicating pipe is connected with a right end port of the four-way valve, the other three ports of the four-way valve are respectively connected with the clamping sleeve type one-way valve, the third communicating pipe and the pressure gauge, the lower end of the clamping sleeve type one-way valve is connected with the second communicating pipe, and the clamping sleeve type one-way valve is communicated in the direction from the four-way valve to the second communicating pipe;
one port of the second cutting ferrule angle type needle valve is connected with the third communicating pipe, and the other port of the second cutting ferrule angle type needle valve is connected with the leakage detecting pipe.
2. The double cutoff positive seal valve as in claim 1 wherein: the first pipe joint is connected with the upstream end or the downstream end of the double-cutoff forced sealing valve, and the second pipe joint is connected with the valve middle cavity of the double-cutoff forced sealing valve.
3. The double cutoff positive seal valve as in claim 2 wherein: the first cutting sleeve angle type needle valve is provided with a first operator, and the first operator is used for opening or closing the first cutting sleeve angle type needle valve; the second cutting sleeve angle type needle valve is provided with a second operator, and the second operator is used for opening or closing the second cutting sleeve angle type needle valve; wherein the first and second operators may be both automatically operated or manually operated.
4. A double cutoff positive seal valve as in claim 3 wherein: the automatic medium cavity drainage system is further provided with a control device, and the control device is used for controlling the actuator, the first manipulator and the second manipulator to act.
5. The double cutoff positive seal valve as in claim 4 wherein: the automatic medium cavity discharging system is further provided with a first sensor, a second sensor, a third sensor and an alarm device, and the control device is respectively in communication connection with the first sensor, the second sensor, the third sensor and the alarm device; the first sensor is used for detecting the pressure in the four-way valve; the second sensor is used for detecting the liquid medium existing in the leakage detection pipe; the third sensor is used for detecting the liquid medium in the first communication pipe; the control device receives detection signals of the first sensor, the second sensor and the third sensor and controls the alarm device to work according to the detection signals.
6. The double cutoff positive seal valve as in claim 5 wherein: the clamping sleeve type one-way valve comprises a one-way valve body, a one-way valve core arranged in the one-way valve body, and a return spring with one end propped against the one-way valve core is arranged in the one-way valve body; the valve core of the one-way valve is provided with a first groove, a sealing ring is arranged in the first groove, the valve core of the one-way valve is also provided with a second groove, and an iron core is arranged in the second groove; and a solenoid is arranged outside the check valve body and used for driving the iron core to reciprocate.
7. The double cutoff positive seal valve as in claim 6 wherein: the alarm device is provided with a display, and can send out an audible and visual alarm signal, and simultaneously, the display is used for displaying the faults or the anomalies existing in the current double-cutoff forced sealing valve in a text mode.
8. A control method for the double cutoff forced sealing valve as recited in claim 7, comprising the steps of:
step one: when the valve works normally, the control device controls the first manipulator and the second manipulator to act so as to close the first cutting sleeve angle type needle valve and the second cutting sleeve angle type needle valve; when the control device controls the executor to close the double-cutoff forced sealing valve, the control device receives the pressure value in the four-way valve detected by the first sensor in real time, and when the pressure value is larger than a first threshold value, the control device controls the alarm device to be in a first working mode; simultaneously, the control device controls the first manipulator to act so as to open the first cutting sleeve angle type needle valve for automatic pressure relief;
step two: when the pressure of the valve middle cavity is normal, the control device controls the first operator and the second operator to act so as to close the first cutting sleeve angle type needle valve and open the second cutting sleeve angle type needle valve; the control device receives the detection signal of the second sensor in real time to judge whether a liquid medium exists in the leak detection pipe, and if the liquid medium exists in the leak detection pipe, the alarm device is controlled to be in a third working mode; otherwise, executing the third step;
step three: the control device controls the first manipulator to act so as to open the first cutting sleeve angle type needle valve; the control device receives the detection signal of the second sensor in real time to judge whether a liquid medium exists in the leak detection pipe, and if the liquid medium exists in the leak detection pipe, the control device is controlled to be in a fourth working mode; otherwise, the alarm device is controlled to be in a fifth working mode.
9. The control method according to claim 8, characterized in that:
after automatic pressure relief is started, executing the second step when the pressure value received by the control device in real time is lower than the first threshold value; when the pressure value received by the control device in real time is continuously increased and is larger than a second threshold value, the alarm device is controlled to be in a second working mode, and when the pressure value received in real time is lower than the first threshold value, the second step is executed; wherein,,
the first working mode is that the alarm device displays red alarm light;
the second working mode is that the alarm device displays flashing red alarm light, gives out alarm sound, and simultaneously controls the alarm device to display the 'cutting sleeve type check valve function fault, please process in time';
the third working mode is that the alarm device displays 'upstream and downstream valve plate sealing faults, and timely maintenance is required';
the fourth working mode is that the alarm device displays the 'clamping sleeve type check valve sealing failure, and timely maintenance is required';
and the fifth working mode is that the alarm device displays that the valve state is good.
10. The control method according to claim 9, characterized in that:
after the control device controls the alarm device to be in the second working mode, the method further comprises the following steps: the control device controls the solenoid to be electrified so as to drive the check valve core to rapidly reciprocate for a plurality of times in a short time.
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Address after: No. 67, Section 1, Xueshan Avenue, Dayi County, Chengdu City, Sichuan Province, 611330 Patentee after: Chengdu Chenggao Valve Co.,Ltd. Patentee after: CHENGDU CHENGFENG VALVE Co.,Ltd. Patentee after: Chengfeng FLOW-TECH Group Address before: 611330 No. 67, Gongye Avenue, Dayi County, Chengdu, Sichuan Patentee before: CHENGDU CHENG GAO VALVE Co.,Ltd. Patentee before: CHENGDU CHENGFENG VALVE Co.,Ltd. Patentee before: Chengfeng FLOW-TECH Group |
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