Valve dual-control interlocking device and control method thereof

Abstract

The invention relates to a valve dual-control interlocking device and a control method thereof. According to the method, a valve A and a valve B are included, one side end faces of the valve A and the valve B are connected with a valve front pipeline C, and the other side end faces of the valve A and the valve B are connected with a valve rear pipeline D; the valve A and the valve B are respectively connected with a gas source end A and a gas source end B; when the valve A is opened and the valve B is closed, the valve front pipeline C and the valve rear pipeline D are communicated through the valve A; when the valve A is closed and the valve B is opened, the valve front pipeline C and the valve rear pipeline D are communicated through the valve B; under the condition that both the valve A and the valve B receive the closing control signal, the valve A and the valve B form an interlocking state, and the valve front pipeline C and the valve rear pipeline D are communicated through the valve A or the valve B. Therefore, interlocking is formed through interaction of the valves, pressure and temperature accumulation of a high-temperature and high-pressure pipeline is avoided, the safety of field operation is guaranteed, and the stability of the valves is improved.

Description

Technical Field

[0001] The present application relates to the field of valve control technology, and in particular to a valve dual control interlocking device and a control method thereof. Background Art

[0002] Pneumatic control is often used to address valve failures. By altering weak electrical signals, it changes the on / off settings of the valve's pneumatic circuit, enabling the entire device to operate on and off. However, simple pneumatic control often fails to meet the market's requirements for complex valve operation. This necessitates the intervention of multiple control components.

[0003] In traditional technologies, commonly used gas circuit control structures can only function normally on valve switches, controlling the flow in pipelines on both sides through dual valves with accessories, as well as simple reset operations.

[0004] However, the traditional control method cannot control the flow fluid in other parts of the pipeline, resulting in excessive pressure at the front end of the pipeline caused by flow accumulation on both sides of the pipeline, making the valve in an unstable state of high pressure. Summary of the Invention

[0005] Based on this, it is necessary to provide a valve dual control interlocking device and its control method that can solve the above technical problems and maintain the stability, safety and reliability of the flow inside the pipeline under high temperature and high pressure pipelines.

[0006] In a first aspect, the present application provides a valve dual control interlocking device, the device comprising: valve A and valve B, one side end faces of the valve A and the valve B are respectively connected to the valve front pipe C through a flange, and the other side end faces of the valve A and the valve B are respectively connected to the valve rear pipe D through a flange; the valve A is connected to the gas source end A, and the valve B is connected to the gas source end B; the gas source end A and the gas source end B control the switching state of the valve A and the valve B according to the control signal transmitted by the central control end; wherein,

[0007] When the valve A receives an opening control signal and the valve B receives a closing control signal, the valve front pipe C and the valve rear pipe D are connected through the valve A;

[0008] When the valve A receives a closing control signal and the valve B receives an opening control signal, the valve front pipe C and the valve rear pipe D are connected through the valve B;

[0009] When both valve A and valve B receive a closing control signal, valve A and valve B form an interlocking state, and the valve front pipe C and the valve rear pipe D are connected through valve A or valve B.

[0010] In one embodiment, the valve A includes: a first valve body, a first valve bracket, a first cylinder, a first manual reversing valve, a first solenoid valve, a first limit switch, a first contact valve, a first mounting panel, a first filter, a first air-controlled valve, a first stroke mounting plate, a first fan-shaped coupling, and a first telescopic contact;

[0011] wherein, the first valve body is fixed on the first valve bracket, the first air cylinder is provided on the upper side of the first valve body, the first mounting panel is provided on the first cylinder, the first mounting panel is loaded with the first filter, the first air-controlled valve and the first solenoid valve; the first manual reversing valve is provided at the air inlet of the first cylinder, and the air inlet of the first cylinder and the first manual reversing valve are connected by a pair of threads; the first stroke mounting plate is provided on the upper end surface of the first cylinder, the first limit switch is fixedly provided on the upper end surface of the bottom side of the first stroke mounting plate, the first fan-shaped connecting shaft is fixedly provided between the first limit switch and the first cylinder, the first contact valve is fixedly provided on the upper end surface of the upper side of the first stroke mounting plate, the first telescopic contact is provided on the rear side of the first contact valve, and the rear end cylinder of the first telescopic contact is in contact with and connected to the first fan-shaped connecting shaft and is on the same horizontal line;

[0012] When the rotation angle of the first limit switch is below a set angle, the first sector coupling contacts and presses down the first telescopic contact to push the first contact valve to switch the valve position.

[0013] In one embodiment, the first travel mounting plate is a Z-shaped bent plate, and the first travel mounting plate and the first limit switch are fixed via a first limit switch bracket.

[0014] In one embodiment, the valve B includes: a second valve body, a second valve bracket, a second cylinder, a second manual reversing valve, a second solenoid valve, a second limit switch, a second contact valve, a second mounting panel, a second filter, a second air-controlled valve, a second stroke mounting plate, a second fan-shaped coupling, and a second telescopic contact;

[0015] In which, the second valve body is fixed on the second valve bracket, the second air cylinder is provided on the upper side of the second valve body, the second mounting panel is provided on the second cylinder, and the second mounting panel is loaded with the second filter, the second air-controlled valve and the second solenoid valve; the second manual reversing valve is provided at the air inlet of the second cylinder, and the air inlet of the second cylinder and the second manual reversing valve are connected by a pair of threads; the second stroke mounting plate is provided on the upper end surface of the second cylinder, the second limit switch is fixedly provided on the upper end surface of the bottom side of the second stroke mounting plate, the second fan-shaped connecting shaft is fixedly provided between the second limit switch and the second cylinder, the second contact valve is fixedly provided on the upper end surface of the upper side of the second stroke mounting plate, the second telescopic contact is provided on the rear side of the second contact valve, and the rear end cylinder of the second telescopic contact is in contact with the second fan-shaped connecting shaft and is on the same horizontal line;

[0016] When the rotation angle of the second limit switch is below a set angle, the second sector-shaped coupling contacts and presses down the second telescopic contact to push the second contact valve to switch the valve position.

[0017] In one embodiment, the second travel mounting plate is a Z-shaped bent plate, and the second travel mounting plate is fixed to the second limit switch via a second limit switch bracket.

[0018] In one embodiment, when air is supplied from the air source end A, the air is divided into two paths after entering the first filter port. One signal path is connected to the signal port of the first air-controlled valve through the first solenoid valve, and the other path enters the air inlet of the first air-controlled valve from the first filter. The air outlet of the first air-controlled valve is connected to the air inlet of the first contact valve. After the air outlet of the first contact valve is connected to the air inlet of the first manual reversing valve, it enters the first cylinder through the matching thread.

[0019] In one embodiment, when air is supplied from the air source end B, the air is divided into two paths after entering the second filter port. One signal path is connected to the signal port of the second air-controlled valve through the second solenoid valve, and the other path enters the air inlet of the second air-controlled valve from the second filter. The air outlet of the second air-controlled valve is connected to the air inlet of the second contact valve. After the air outlet of the second contact valve is connected to the air inlet of the second manual reversing valve, it enters the second cylinder through the matching thread.

[0020] In a second aspect, the present application further provides a valve dual control interlocking control method, which is applied to the valve dual control interlocking device described in any one of the first aspects, and the method includes:

[0021] The central control terminal transmits the control signal to the gas source terminal A and the gas source terminal B;

[0022] When there is gas at the gas source end A and valve A receives a closing control signal, valve A is closed; or when there is gas at the gas source end B and valve B receives a closing control signal, valve B is closed;

[0023] When there is gas at the gas source end A and valve A receives an opening control signal, valve A opens; or when there is gas at the gas source end B and valve B receives an opening control signal, valve B opens;

[0024] When the gas source end A loses air and the first contact valve is pressed down, the valve A opens; or when the gas source end B loses air and the second contact valve is pressed down, the valve B opens;

[0025] When the opening of valve A is greater than a preset value, the first contact valve switches to ventilation, and valve B can open and close normally; or, when the opening of valve B is greater than a preset value, the second contact valve switches to ventilation, and valve A can open and close normally;

[0026] When the opening of the valve A is not greater than the preset value, the first contact valve switches to exhaust and the valve B opens; or, when the opening of the valve B is greater than the preset value, the second contact valve switches to ventilation and the valve A can be opened and closed normally.

[0027] In one embodiment, the method further comprises:

[0028] When the first manual reversing valve is in the open state, opening the valve A; and / or,

[0029] When the second manual reversing valve is in the open state, the valve B is opened.

[0030] In one embodiment, the method further includes: when both the gas source end A and the gas source end B have gas and both the valve A and the valve B receive a closing control signal, determining the opening of the valve A and the valve B respectively;

[0031] When the opening of valve A is less than the set opening and valve A is closed before valve B, valve B is reopened;

[0032] When the opening of the valve B is less than the set opening and the valve B is closed before the valve A, the valve A is reopened.

[0033] The above-mentioned valve dual control interlocking device and control method thereof are provided by setting valve A and valve B, and one side end faces of the valve A and the valve B are respectively connected to the valve front pipe C through flanges, and the other side end faces of the valve A and the valve B are respectively connected to the valve rear pipe D through flanges; the valve A is connected to the gas source end A, and the valve B is connected to the gas source end B; the gas source end A and the gas source end B control the switching state of the valve A and the valve B according to the control signal transmitted by the central control end; when the valve A receives an opening control signal and the valve B receives a closing control signal, the valve front pipe C and the valve rear pipe D are connected through the valve A; when the valve A receives a closing control signal and the valve B receives an opening control signal, the valve front pipe C and the valve rear pipe D are connected through the valve B; when the valve A and the valve B both receive a closing control signal, the valve A and the valve B form an interlocking state, and the valve front pipe C and the valve rear pipe D are connected through the valve A or the valve B. Thus, the interaction of valves forms an interlock, so that there will be no pressure and temperature accumulation in high-temperature and high-pressure pipelines, ensuring the safety of on-site operations, improving valve stability, and reducing the impact of misoperation in the central control room or damage to gas source accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of a valve dual control interlocking device provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of a valve A provided in an embodiment of the present application Figure 1 ;

[0037] Figure 3 A schematic diagram of the structure of a valve A provided in an embodiment of the present application Figure 2 ;

[0038] Figure 4 A schematic diagram of the structure of a valve B provided in an embodiment of the present application Figure 1 ;

[0039] Figure 5 A schematic diagram of the structure of a valve B provided in an embodiment of the present application Figure 2 ;

[0040] Figure 6 A schematic diagram of the air circuit control principle of a valve dual control interlocking device provided in an embodiment of the present application;

[0041] Figure 7 This is a flow chart of the air circuit control of a valve dual control interlocking device provided in an embodiment of the present application.

[0042] In the figure: A represents valve A, B represents valve B, C represents the pipeline before the valve, and D represents the pipeline after the valve; among them, A+number represents the various components included in valve A, and B+number represents the various components included in valve B.

[0043] Specifically, A1-first valve body, A2-first valve bracket, A3-first cylinder, A4-first manual reversing valve, A5-first solenoid valve, A6-first limit switch, A7-first contact valve, A8-first mounting panel, A9-first filter, A10-first air-controlled valve, A11-first stroke mounting plate, A12-first fan-shaped coupling, A13-first telescopic contact, B1-second valve body, B2-second valve bracket, B3-second cylinder, B4-second manual reversing valve, B5-second solenoid valve, B6-second limit switch, B7-second contact valve, B8-second mounting panel, B9-second filter, B10-second air-controlled valve, B11-second stroke mounting plate, B12-second fan-shaped coupling, B13-second telescopic contact. DETAILED DESCRIPTION

[0044] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the term "connected" can be used for both fixing and circuit connection.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0048] Existing air control devices often use a single air source to control the opening and closing of a valve, thus failing to control the flow of fluid in other pipelines. For example, in petroleum and chemical projects, if both sides of a pipeline cannot be closed simultaneously, the accumulation of fluid on both sides can lead to excessive pressure at the front end, exposing the valve to high pressure and reducing its safety and reliability.

[0049] To address the existing technical issues, the two sides of the pipeline can be interlocked. When one side of the pipeline is closed, the other side is kept open, maintaining a relatively stable internal pressure. In addition, if the gas source is cut off or the solenoid valve loses power, the valves on both sides will reset and open. In an emergency, the valves will release pressure, complete fault identification, and ensure the safety of the valve and pipeline.

[0050] The embodiment of the present application aims to provide a valve dual control interlocking device, which solves the problem of the valve being able to maintain the stability, safety, and reliability of the internal flow of the pipeline under high temperature and high pressure pipelines. For example, under normal conditions, the gas source supplies gas, and when the solenoid valve is energized, the valve solenoid valve receives the gas source model, cooperates with the air control valve to normally intake air, and the valve control opening on one side of the pipeline is normally switched on and off. When the valve opening is less than the set opening, the contact valve on the normal intake side is disconnected from the limit switch, and the valve on the other side of the pipeline is quickly exhausted to ensure that the valve is in a normally open state. When the valve on one side is normally opened from closed to greater than the set opening, the contact valve switches to ventilation, and then the valve on the other side can be closed normally; when the gas source ends lose gas at the same time in an emergency, the pipeline valves on both sides of the device are opened at the same time to ensure that the flow channel medium does not accumulate.

[0051] For example, Figure 1 A schematic diagram of a valve dual control interlocking device provided in an embodiment of the present application is shown in FIG. Figure 1As shown, it may include: valve A and valve B, one side end surface of the valve A and the valve B are respectively connected to the valve front pipe C through a flange, and the other side end surfaces of the valve A and the valve B are respectively connected to the valve rear pipe D through a flange; the valve A is connected to the gas source end A, and the valve B is connected to the gas source end B; the gas source end A and the gas source end B control the switching state of the valve A and the valve B according to the control signal transmitted by the central control end; wherein,

[0052] When the valve A receives an opening control signal and the valve B receives a closing control signal, the valve front pipe C and the valve rear pipe D are connected through the valve A;

[0053] When the valve A receives a closing control signal and the valve B receives an opening control signal, the valve front pipe C and the valve rear pipe D are connected through the valve B;

[0054] When both valve A and valve B receive a closing control signal, valve A and valve B form an interlocking state, and the valve front pipe C and the valve rear pipe D are connected through valve A or valve B.

[0055] For example, Figure 2 A schematic diagram of the structure of a valve A provided in an embodiment of the present application Figure 1 , Figure 3 A schematic diagram of the structure of a valve A provided in an embodiment of the present application Figure 2 ,like Figure 2 、 Figure 3 As shown, the valve A includes: a first valve body A1, a first valve bracket A2, a first cylinder A3, a first manual reversing valve A4, a first solenoid valve A5, a first limit switch A6, a first contact valve A7, a first mounting panel A8, a first filter A9, a first air-controlled valve A10, a first stroke mounting plate A11, a first fan-shaped coupling A12 and a first telescopic contact A13;

[0056] The first valve body A1 is fixed on the first valve bracket A2. The first cylinder A3 is provided on the upper side of the first valve body A1. The first mounting panel A8 is provided on the first cylinder A3. The first filter A9, the first air control valve A10 and the first solenoid valve A5 are mounted on the first mounting panel A8. The first manual reversing valve A4 is provided at the air inlet of the first cylinder A3. The air inlet of the first cylinder A3 and the first manual reversing valve A4 are connected by threading. The first stroke mounting plate A11 is provided on the upper end surface of the first cylinder A3. The first limit switch A6 is fixed on the upper end surface of the bottom side of the first stroke mounting plate A11. The first fan-shaped connecting shaft A12 is fixed between the first limit switch A6 and the first cylinder A3. The first contact valve A7 is fixed on the upper end surface of the first stroke mounting plate A11. The first telescopic contact A13 is provided on the rear side of the first contact valve A7. The rear end cylinder of the first telescopic contact A13 is in contact with the first fan-shaped connecting shaft A12 and is on the same horizontal line.

[0057] When the rotation angle of the first limit switch A6 is below the set angle, the first sector connecting shaft A12 contacts and presses down with the first telescopic contact A13 to push the first contact valve A7 to switch the valve position.

[0058] In this embodiment, a uniform and symmetrical first valve bracket A2 is provided at the bottom end of the valve A. The first valve bracket A2 is used for support and fixation. The first valve body A1 is fixed between the first valve brackets A2 on both sides by bolts. A first cylinder A3 is fixed on the upper side of the first valve body A1, and air circuit accessories are installed on the first cylinder A3.

[0059] In this embodiment, a first mounting panel A8 is fixed to the front of the first cylinder A3 and fixed by bolts and washers. A first filter A9 is fixed to the right side of the front end face of the first mounting panel A8. A first air-controlled valve A10 is fixed to the upper center side of the front end face of the first mounting panel A8. A first solenoid valve A5 is fixed to the left side of the front end face of the first mounting panel A8. The first filter A9, the first air-controlled valve A10 and the first solenoid valve A5 are fixed on the first mounting panel A8 and connected by a sleeve joint.

[0060] In this embodiment, a first stroke mounting plate A11 is fixedly provided on the upper end surface of the first cylinder A3. The first stroke mounting plate A11 is a Z-shaped bent plate. A first limit switch A6 is fixedly provided on the upper end surface of the bottom side of the first stroke mounting plate A11 and is fixed by a first limit switch bracket.

[0061] In this embodiment, a first fan-shaped connecting shaft A12 is fixed between the first limit switch A6 and the first cylinder A3, a first contact valve A7 is fixed on the upper end surface of the upper side of the first stroke mounting plate A11, and a first telescopic contact A13 with a small elastic extension is provided on the rear side of the first contact valve A7. The rear end cylinder of the first telescopic contact A13 is in contact with and connected to the first fan-shaped connecting shaft A12 and is on the same horizontal line. When the first limit switch A6 rotates below the set angle, the first fan-shaped connecting shaft A12 contacts and presses down with the first telescopic contact A13, thereby pushing the valve position of the first contact valve A7 to switch, driving the second cylinder B3 on the other side to exhaust and open.

[0062] For example, Figure 4 A schematic diagram of the structure of a valve B provided in an embodiment of the present application Figure 1 , Figure 5 A schematic diagram of the structure of a valve B provided in an embodiment of the present application Figure 2 ,like Figure 4 、 Figure 5 As shown, the valve B includes: a second valve body B1, a second valve bracket B2, a second cylinder B3, a second manual reversing valve B4, a second solenoid valve B5, a second limit switch B6, a second contact valve B7, a second mounting panel B8, a second filter B9, a second air-controlled valve B10, a second stroke mounting plate B11, a second fan-shaped coupling B12, and a second telescopic contact B13;

[0063] Among them, the second valve body B1 is fixed on the second valve bracket B2, and the second cylinder B3 is provided on the upper side of the second valve body B1. The second mounting panel B8 is provided on the second cylinder B3, and the second mounting panel B8 is loaded with the second filter B9, the second air-controlled valve B10 and the second solenoid valve B5; the second manual reversing valve B4 is provided at the air inlet of the second cylinder B3, and the air inlet of the second cylinder B3 and the second manual reversing valve B4 are connected by threading; the second stroke mounting plate B11 is provided on the upper end surface of the second cylinder B3, and the second limit switch B6 is fixed on the upper end surface of the bottom side of the second stroke mounting plate B11. The second fan-shaped connecting shaft B12 is fixed between the second limit switch B6 and the second cylinder B3; the second contact valve B7 is fixed on the upper end surface of the upper side of the second stroke mounting plate B11, and the second telescopic contact B13 is provided on the rear side of the second contact valve B7. The rear end cylinder of the second telescopic contact B13 is in contact with the second fan-shaped connecting shaft B12 and is on the same horizontal line;

[0064] When the rotation angle of the second limit switch B6 is below the set angle, the second sector connecting shaft B12 contacts and presses down the second telescopic contact B13 to push the second contact valve B7 to switch the valve position.

[0065] In this embodiment, a second stroke mounting plate B11 is fixedly provided on the upper end surface of the second cylinder B3. The second stroke mounting plate B11 is a Z-shaped bent plate. A second limit switch B6 is fixedly provided on the upper end surface of the bottom side of the second stroke mounting plate B11 and is fixed by a second limit switch bracket.

[0066] In this embodiment, a second fan-shaped connecting shaft B12 is fixed between the second limit switch B6 and the second cylinder B3, a second contact valve B7 is fixed on the upper end surface of the second stroke mounting plate B11, and a second telescopic contact B13 with a small elastic extension is provided on the rear side of the second contact valve B7. The rear end cylinder of the second telescopic contact B13 is in contact with and connected to the second fan-shaped connecting shaft B12 and is on the same horizontal line. When the second limit switch B6 rotates below the set angle, the second fan-shaped connecting shaft B12 contacts and presses down with the second telescopic contact B13, thereby pushing the valve position of the second contact valve B7 to switch, driving the second cylinder A3 on the other side to exhaust and open.

[0067] It should be understood that valve B has the same structure as valve A, so the relevant explanations about valve A are also applicable to valve B.

[0068] In this embodiment, the main air circuit A takes in air from the on-site air circuit, and is divided into two paths after taking in air from the port of the first filter A9. One signal path is connected to the signal port of the first air-controlled valve A10 through the first solenoid valve A5, and the other path enters the air inlet of the first air-controlled valve A10 from the first filter A9. The air outlet of the first air-controlled valve A10 is connected to the air inlet of the first contact valve B7. The air outlet of the first contact valve B7 is connected to the air inlet of the first manual reversing valve A4, and then enters the first cylinder A3 through the matching thread.

[0069] In this embodiment, the main air circuit B takes in air from the on-site air circuit. After taking in air from the port of the second filter B9, it is divided into two paths. One signal path is connected to the signal port of the second air-controlled valve B10 through the second solenoid valve B5, and the other path enters the air inlet of the second air-controlled valve B10 from the second filter B9. The air outlet of the second air-controlled valve B10 is connected to the air inlet of the second contact valve A7. The air outlet of the second contact valve A7 is connected to the air inlet of the second manual reversing valve B4, and then enters the second cylinder B3 through the matching thread.

[0070] In this embodiment, when the opening of valve A in main gas circuit A is less than the set opening and is closed, main gas circuit B is always in a disconnected gas circuit, and the exhaust gas from cylinder port B3 of main gas circuit B is discharged through contact valve B7, ensuring that the device is always in a safe state, reducing the excessive pressure difference between the front and back of the valve under high temperature and high pressure, and maintaining the stability of the flow channel.

[0071] In this embodiment, the solenoid valves A5 and B5 of valve A and valve B are energized at the same time. In the event of an erroneous operation in the central control room, the valve that closes first closes normally, and the valve on the other side quickly exhausts air and reopens due to the response of the electric shock valve.

[0072] This embodiment can quickly open the valve in an emergency situation through the manual reversing valve to relieve the pressure in the high-temperature and high-pressure pipeline when the valve cannot be opened and is stuck, so as to quickly relieve the pressure in the pipeline in front of the valve, ensure the safety of on-site operation and production, and solve the problem of valve working under high-temperature and high-pressure conditions through the emergency double pressure relief and double insurance mechanism, thereby reducing the occurrence of safety accidents.

[0073] For example, the present application also provides a valve dual control interlocking control method, which can be applied to the above Figures 1 to 5 In the device shown, the method for valve A may include the following steps:

[0074] Step S11: The central control terminal transmits the control signal to the gas source terminal A and the gas source terminal B;

[0075] Step S12: When there is gas at the gas source end A and the valve A receives a closing control signal, the valve A is closed.

[0076] Step S13: When there is gas at the gas source end A and the valve A receives an opening control signal, the valve A is opened.

[0077] Step S14: When the gas source end A loses air and the first contact valve is pressed down, the valve A opens.

[0078] Step S15: When the opening of the valve A is greater than a preset value, the first contact valve switches to ventilation, and the valve B can open and close normally.

[0079] Step S16: When the opening of the valve A is not greater than the preset value, the first contact valve switches to exhaust and the valve B opens.

[0080] Exemplarily, the method for valve B may include the following steps:

[0081] Step S21: The central control terminal transmits the control signal to the gas source terminal A and the gas source terminal B;

[0082] Step S22: When there is gas at the gas source end B and the valve B receives a closing control signal, the valve B is closed.

[0083] Step S23: When there is gas at the gas source end B and the valve B receives an opening control signal, the valve B is opened.

[0084] Step S24: When the gas source end B loses air and the second contact valve is pressed down, the valve B opens.

[0085] Step S25: When the opening of the valve B is greater than a preset value, the second contact valve switches to ventilation, and the valve A can be opened and closed normally.

[0086] Step S26: When the opening of the valve B is greater than a preset value, the second contact valve switches to ventilation, and the valve A can be opened and closed normally.

[0087] Optionally, when the first manual reversing valve is in the open state, the valve A is opened; and / or when the second manual reversing valve is in the open state, the valve B is opened.

[0088] Optionally, when there is gas at both the gas source end A and the gas source end B, and both valve A and valve B receive closing control signals, the openings of valve A and valve B are respectively determined; when the opening of valve A is less than the set opening and valve A closes before valve B, valve B is reopened; when the opening of valve B is less than the set opening and valve B closes before valve A, valve A is reopened.

[0089] For example, Figure 6 This is a schematic diagram of the air circuit control principle of a valve dual control interlocking device provided in an embodiment of the present application. Figure 7 This is a flow chart of the air circuit control of a valve dual control interlocking device provided in the embodiment of the present application. Figure 6 、 Figure 7 , which can be applied to Figures 1 to 5 In the device shown, for example, when air is flowing through the first filter A9 and the first solenoid valve A5 is energized, the signal port of the first air-controlled valve A10 receives an air source signal to control the valve position. This in turn drives air from the first filter A9 into the first air-controlled valve A10. This in turn drives the air into the second contact valve B7, which then passes through the second contact valve B7 to the first manual reversing valve A4, and finally into the first cylinder A3, which controls the valve closure. When the valve A opening is less than the set opening, the first contact valve A7 and the first fan-shaped coupling A12 are no longer in contact, allowing the second cylinder B3 to be rapidly exhausted through the first contact valve A7. Under high-temperature and high-pressure conditions, only one side of the valve is allowed to close. When air is flowing through the air source A and the first solenoid valve A5 is de-energized, the first air-controlled valve A10 remains in its original position. Consequently, the air from the first cylinder A3 flows along the first manual reversing valve A4 into the first contact valve B7 and is discharged through the first air-controlled valve A10.

[0090] Optionally, when the gas source end A supplies gas and the gas source end B loses gas, if the first solenoid valve A5 is energized, the first filter A9 takes in air, and the signal path air intake drives the first solenoid valve A5 to operate, controlling the first gas control valve A10 to switch the valve position; since the gas source end B loses gas, the second contact valve B7 is always in the passage state, and then the gas path enters the first manual reversing valve A4 through the second contact valve B7; the first manual reversing valve A4 is in the normally open state, and the input gas source enters the first cylinder A3 through the first manual reversing valve A4, pushing the first cylinder A3 to close. At this time, valve A is closed and valve B is in the normally open state.

[0091] Optionally, when the gas source end A supplies gas and the gas source end B loses gas, if the first solenoid valve A5 loses power, the main gas circuit is closed, the exhaust of the gas circuits on both sides is normally open, and the internal gas sources of the first cylinder A3 and the second cylinder B3 are exhausted to the first manual reversing valve A4 and the second manual reversing valve B4 respectively; the gas enters the second contact valve B7 and the first air-controlled valve A10 along the first manual reversing valve A4 for exhaust, or the gas enters the first contact valve A7 and the second air-controlled valve B10 along the second manual reversing valve B4 for exhaust; at this time, valve A and valve B are in a closed state.

[0092] Optionally, when the gas source end B supplies gas and the gas source end A loses gas, if the second solenoid valve B5 is energized, the second filter B9 takes in air, and the signal path air intake drives the second solenoid valve B5 to operate, controlling the second gas-controlled valve B10 to switch the valve position; since the gas source end B supplies gas, the first contact valve A7 is always in the passage state, and then the gas path enters the second manual reversing valve B4 through the first contact valve A7; the second manual reversing valve B4 is in the normally open state, and the input gas source enters the second cylinder B3 through the second manual reversing valve B4, pushing the second cylinder B3 to close. At this time, valve B is closed and valve A is in the normally open state.

[0093] Optionally, when the gas source end B supplies gas and the gas source end A loses gas, if the first solenoid valve A5 loses power, the main gas path is closed, the exhaust of the gas paths on both sides is normally open, and the internal gas sources of the first cylinder A3 and the second cylinder B3 are exhausted to the first manual reversing valve A4 and the second manual reversing valve B4 respectively; the gas enters the first contact valve A7 and the second air-controlled valve B10 along the second manual reversing valve B4 for exhaust, or the gas enters the second contact valve B7 and the first air-controlled valve A10 along the first manual reversing valve A4 for exhaust; at this time, valve A and valve B are in a closed state.

[0094] Optionally, when both the gas source end A and the gas source end B supply gas, and the first solenoid valve A5 and the second solenoid valve B5 are energized (such a situation is an emergency state due to malfunction of the valve at the central control end or a problem with the gas source accessories), due to on-site piping problems, there is a difference in the closing time of the two valves. Therefore, when the opening is less than the preset opening, the valve that closes first controls the other valve to reopen; thereby forming a device interlock, making it impossible for the two valves to close at the same time.

[0095] For example, when excessive pressure in the pipeline creates an emergency, the first and second manual reversing valves A4 and B4 are rotated to rapidly release air, pushing the valves open and depressurizing the pipeline. Because the pipeline is high-temperature and high-pressure, if a central control unit malfunctions, causing both valves to close simultaneously, and one valve opening falls below the set value, the other valve reopens, creating an interlocking mechanism to prevent excessive pressure and temperature in the pipeline.

[0096] This embodiment can maintain the stability, safety, and reliability of the internal flow of the pipeline under high temperature and high pressure. Under normal conditions, the gas source supplies gas, and when the solenoid valve is energized, the valve solenoid valve receives the gas source model, cooperates with the air control valve to normally intake air, and the valve on one side controls the opening and closes normally. When the valve opening is less than the set opening, the contact valve on the normal intake side is disconnected from the limit switch, and the valve on the other side quickly exhausts air to ensure that the valve is in a normally open state; when the valve on one side is normally opened from closed to greater than the set opening, the contact valve switches to ventilation, and the valve on the other side can then be closed normally; when the gas source ends lose gas at the same time in an emergency, the pipeline valves on both sides of the device are opened at the same time to ensure that the flow channel medium does not accumulate.

[0097] In this embodiment, the valves interact to create an interlocking system, preventing pressure and temperature buildup in high-temperature, high-pressure pipelines. This ensures safe on-site operation and overall system stability, minimizing issues arising from misoperation in the central control room or damage to gas source accessories. A limit switch connection ensures that when a valve's opening falls below the set value, the other valve remains open, controlled by the sector valve and contact valve.

[0098] The above is the core idea of ​​the present invention. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0099] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0100] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various variations or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A valve dual control interlocking device, characterized in that: The device comprises: a valve A and a valve B, one end face of each valve A and valve B is connected to a valve front pipe C via a flange, and the other end faces of each valve A and valve B are connected to a valve rear pipe D via a flange; the valve A is connected to an air source end A, and the valve B is connected to an air source end B; the air source end A and the air source end B control the on / off states of the valve A and the valve B according to a control signal transmitted from a central control end; wherein, When the valve A receives an opening control signal and the valve B receives a closing control signal, the valve front pipe C and the valve rear pipe D are connected through the valve A; When the valve A receives a closing control signal and the valve B receives an opening control signal, the valve front pipe C and the valve rear pipe D are connected through the valve B; When both valve A and valve B receive a closing control signal, valve A and valve B form an interlocking state, and the valve front pipe C and the valve rear pipe D are connected through valve A or valve B.

2. The device according to claim 1, characterized in that The valve A comprises: a first valve body, a first valve bracket, a first cylinder, a first manual reversing valve, a first solenoid valve, a first limit switch, a first contact valve, a first mounting panel, a first filter, a first air-controlled valve, a first stroke mounting plate, a first fan-shaped coupling and a first telescopic contact; wherein, the first valve body is fixed on the first valve bracket, the first air cylinder is provided on the upper side of the first valve body, the first mounting panel is provided on the first cylinder, the first mounting panel is loaded with the first filter, the first air-controlled valve and the first solenoid valve; the first manual reversing valve is provided at the air inlet of the first cylinder, and the air inlet of the first cylinder and the first manual reversing valve are connected by a pair of threads; the first stroke mounting plate is provided on the upper end surface of the first cylinder, the first limit switch is fixedly provided on the upper end surface of the bottom side of the first stroke mounting plate, the first fan-shaped connecting shaft is fixedly provided between the first limit switch and the first cylinder, the first contact valve is fixedly provided on the upper end surface of the upper side of the first stroke mounting plate, the first telescopic contact is provided on the rear side of the first contact valve, and the rear end cylinder of the first telescopic contact is in contact with and connected to the first fan-shaped connecting shaft and is on the same horizontal line; When the rotation angle of the first limit switch is below a set angle, the first sector coupling contacts and presses down the first telescopic contact to push the first contact valve to switch the valve position.

3. The device according to claim 2, characterized in that The first travel mounting plate is a Z-shaped bent plate, and the first travel mounting plate is fixed to the first limit switch via a first limit switch bracket.

4. The device according to claim 1, characterized in that The valve B includes: a second valve body, a second valve bracket, a second cylinder, a second manual reversing valve, a second solenoid valve, a second limit switch, a second contact valve, a second mounting panel, a second filter, a second air-controlled valve, a second stroke mounting plate, a second fan-shaped coupling and a second telescopic contact; In which, the second valve body is fixed on the second valve bracket, the second air cylinder is provided on the upper side of the second valve body, the second mounting panel is provided on the second cylinder, and the second mounting panel is loaded with the second filter, the second air-controlled valve and the second solenoid valve; the second manual reversing valve is provided at the air inlet of the second cylinder, and the air inlet of the second cylinder and the second manual reversing valve are connected by a pair of threads; the second stroke mounting plate is provided on the upper end surface of the second cylinder, the second limit switch is fixedly provided on the upper end surface of the bottom side of the second stroke mounting plate, the second fan-shaped connecting shaft is fixedly provided between the second limit switch and the second cylinder, the second contact valve is fixedly provided on the upper end surface of the upper side of the second stroke mounting plate, the second telescopic contact is provided on the rear side of the second contact valve, and the rear end cylinder of the second telescopic contact is in contact with the second fan-shaped connecting shaft and is on the same horizontal line; When the rotation angle of the second limit switch is below a set angle, the second sector-shaped coupling contacts and presses down the second telescopic contact to push the second contact valve to switch the valve position.

5. The device according to claim 4, characterized in that The second stroke mounting plate is a Z-shaped bent plate, and the second stroke mounting plate is fixed to the second limit switch via a second limit switch bracket.

6. The device according to claim 2, characterized in that When air is supplied from the air source end A, the air is divided into two paths after entering the first filter port. One signal path is connected to the signal port of the first air-controlled valve through the first solenoid valve, and the other path enters the air inlet of the first air-controlled valve from the first filter. The air outlet of the first air-controlled valve is connected to the air inlet of the first contact valve. After the air outlet of the first contact valve is connected to the air inlet of the first manual reversing valve, it enters the first cylinder through the matching thread.

7. The device according to claim 4, characterized in that When air is supplied from the air source end B, the air is divided into two paths after entering the second filter port. One signal path is connected to the signal port of the second air-controlled valve through the second solenoid valve, and the other path enters the air inlet of the second air-controlled valve from the second filter. The air outlet of the second air-controlled valve is connected to the air inlet of the second contact valve. After the air outlet of the second contact valve is connected to the air inlet of the second manual reversing valve, it enters the second cylinder through the matching thread.

8. A valve dual control interlocking control method, characterized in that: Applied to the device according to any one of claims 1 to 7, the method comprises: The central control terminal transmits the control signal to the gas source terminal A and the gas source terminal B; When there is gas at the gas source end A and valve A receives a closing control signal, valve A is closed; or when there is gas at the gas source end B and valve B receives a closing control signal, valve B is closed; When there is gas at the gas source end A and valve A receives an opening control signal, valve A opens; or when there is gas at the gas source end B and valve B receives an opening control signal, valve B opens; When the gas source end A loses air and the first contact valve is pressed down, the valve A opens; or when the gas source end B loses air and the second contact valve is pressed down, the valve B opens; When the opening of valve A is greater than a preset value, the first contact valve switches to ventilation, and valve B can open and close normally; or, when the opening of valve B is greater than a preset value, the second contact valve switches to ventilation, and valve A can open and close normally; When the opening of the valve A is not greater than the preset value, the first contact valve switches to exhaust and the valve B opens; or, when the opening of the valve B is greater than the preset value, the second contact valve switches to ventilation and the valve A can be opened and closed normally.

9. The method according to claim 8, characterized in that The method further comprises: When the first manual reversing valve is in the open state, opening the valve A; and / or, When the second manual reversing valve is in the open state, the valve B is opened.

10. The method according to claim 8, characterized in that The method further comprises: When both the gas source end A and the gas source end B have gas, and both the valve A and the valve B receive a closing control signal, the opening of the valve A and the valve B are determined respectively; When the opening of valve A is less than the set opening and valve A is closed before valve B, valve B is reopened; When the opening of the valve B is less than the set opening and the valve B is closed before the valve A, the valve A is reopened.

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