Emergency cut-off system and method for gas quick cut-off valve based on triple collaborative redundancy

Abstract

The invention provides a gas quick switching-off valve emergency switching-off system and method based on triple cooperative redundancy, relates to the field of safety protection of gas pipeline equipment, and aims to solve the problems of operation refusal, response delay, single-point failure risk and the like of an existing quick switching-off valve system under the power-losing working condition. According to the system, through a triple collaborative architecture of a hydraulic system transformation module, an electrical system transformation module and a control program optimization module, a power-on quick-closing type electromagnetic valve is replaced by a power-off quick-closing type electromagnetic valve, an emergency power supply loop of a UPS power supply series sudden stop button is constructed, a DCS direct tripping mechanism is optimized, and a triple redundant link of hydraulic automatic control, electrical emergency and control direct tripping is formed. The corresponding emergency cut-off method is executed according to the processes of fault detection, control response, electrical execution, hydraulic action and valve closing, ultra-fast emergency cut-off smaller than or equal to 0.4 second is achieved, the accident rate is reduced by 90% or above, and the method is suitable for high-risk fluid industrial scenes such as steel, chemical engineering and natural gas conveying and has remarkable safety benefits and popularization value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel plant coal gas pipeline equipment safety protection, and particularly relates to a coal gas quick cut valve emergency cut-off system and method based on triple coordinated redundancy. BACKGROUND

[0002] The quick cut valve is the core safety equipment of the coal gas pipeline, and needs to quickly cut off the coal gas passage within 0.5 seconds in case of failure to avoid leakage and explosion accidents. However, the existing quick cut valve system has the following fatal defects:

[0003] 1. Function defect of the quick cut valve: the traditional system adopts a power-on quick closing electromagnetic valve, and when the control system loses power, the electromagnetic valve cannot conduct the oil circuit, resulting in valve failure, and high-pressure coal gas continues to flow, causing accidents. The total protection time is greater than or equal to 2 seconds, which is far beyond the safety time window.

[0004] 2. Outstanding technical bottleneck: the hydraulic system relies on a single power source or control logic, and there is a single point failure risk; the electrical system has no emergency power supply design, and cannot guarantee valve action after power loss; the control logic needs to be transferred through multiple links, resulting in serious response delay.

[0005] The existing related technologies cannot fully solve the above problems. For example, some solutions rely on pneumatic control or accumulator drive, lack of redundancy design and emergency protection. Some solutions are only suitable for specific working conditions, and the logic is complex and the response speed is slow. SUMMARY

[0006] The present application aims to solve the problems of valve failure, response delay and single point failure risk of the existing quick cut valve system under power loss working condition. Through triple coordinated transformation, ultra-fast and high-reliable emergency cut-off is realized in case of failure, meeting the intrinsic safety requirements of high-risk fluid pipelines.

[0007] In order to achieve the above purpose, the present application provides a coal gas quick cut valve emergency cut-off system based on triple coordinated redundancy, which comprises:

[0008] A hydraulic system transformation module is used to replace the power-on quick closing electromagnetic valve in the original cut-off system with a power-off quick closing electromagnetic valve, based on the design of double power-off quick closing electromagnetic valve parallel oil circuit, so that the hydraulic cylinder quick closing cavity pressure is released when any power-off quick closing electromagnetic valve loses power, and the power-off quick closing electromagnetic valve that loses power completes the closing action;

[0009] An electrical system transformation module is used to construct an emergency power supply circuit of UPS power supply in series with an emergency stop button, which provides emergency power supply for the power-off quick closing electromagnetic valve when any power-off quick closing electromagnetic valve loses power;

[0010] The control program optimization module is used to cancel the signal transfer module in the original cut-off system, and when any de-energized fast closing electromagnetic valve loses power, a direct connection channel of fault signal and tripping instruction is established.

[0011] Preferably, in the hydraulic system modification module, based on the parallel oil path design of the double de-energized fast closing electromagnetic valve, two independent physically isolated oil paths are led out from the hydraulic cylinder fast closing cavity, and are connected to the oil inlet of the 1.2DT and 1.3DT de-energized fast closing electromagnetic valves respectively. When any de-energized fast closing electromagnetic valve loses power, the spring force can be used to conduct the oil leakage oil path, so that the pressure of the hydraulic cylinder fast closing cavity is released, and the de-energized fast closing electromagnetic valve completes the closing action.

[0012] Preferably, the working pressure of the de-energized fast closing electromagnetic valve is 31.5Mpa, and the oil port diameter is The response time is less than or equal to 80ms.

[0013] Preferably, in the electrical system modification module, when any de-energized fast closing electromagnetic valve loses power, the emergency power supply circuit of the UPS power supply series emergency stop button is started, and 300ms emergency power supply is provided to the de-energized de-energized fast closing electromagnetic valve.

[0014] Preferably, the normally closed contact of the relay connected in the emergency power supply circuit of the UPS power supply series emergency stop button is replaced by a normally open contact, and the tripping circuit is reconstructed as: protection signal→intermediate relay KA closed→relay coil powered on→relay normally open contact closed→de-energized fast closing electromagnetic valve loses power→de-energized fast closing electromagnetic valve valve closed.

[0015] Compared with the prior art, the triple synergistic redundancy-based coal gas quick switching valve emergency shutdown system has the following beneficial effects: the original power-on quick closing electromagnetic valve in the original shutdown system is replaced by a power-off quick closing electromagnetic valve by using a hydraulic system reforming module, based on a double power-off quick closing electromagnetic valve parallel oil path design, when any power-off quick closing electromagnetic valve loses power, the spring force can be used to conduct the oil leakage oil path, the hydraulic cylinder quick closing cavity pressure is released, and the power-off quick closing electromagnetic valve that loses power completes the closing action, the double electromagnetic valve parallel oil path design is adopted, any valve failure can still release pressure and close the valve, the spring force automatically releases oil and closes the valve when power is off, and the power-off refusal to act of the traditional valve is solved. An emergency power supply circuit of the UPS power supply series emergency stop button is constructed by using an electrical system reforming module, and when any power-off quick closing electromagnetic valve loses power, the power-off quick closing electromagnetic valve is provided with emergency power supply; a signal transfer module in the original shutdown system is cancelled by using a control program optimization module, when any power-off quick closing electromagnetic valve loses power, a direct connection channel of the fault signal and the trip instruction is established, the signal transmission is compressed to 200 ms without PLC signal transfer, and the efficiency is improved by 80%. The triple synergistic reforming of the hydraulic system reforming module, the electrical system reforming module and the control program optimization module compresses the emergency shutdown time from greater than or equal to 2 seconds to less than or equal to 0.4 seconds, and completely solves the fatal defect of the valve refusal to act under the power-off working condition.

[0016] The application also provides a triple synergistic redundancy-based coal gas quick switching valve emergency shutdown method, which comprises the following steps:

[0017] The original power-on quick closing electromagnetic valve is replaced by a power-off quick closing electromagnetic valve, based on a double power-off quick closing electromagnetic valve parallel oil path design, when any power-off quick closing electromagnetic valve loses power, the spring force can be used to conduct the oil leakage oil path, the hydraulic cylinder quick closing cavity pressure is released, and the power-off quick closing electromagnetic valve that loses power completes the closing action;

[0018] An emergency power supply circuit of the UPS power supply series emergency stop button is constructed, and when any power-off quick closing electromagnetic valve loses power, the power-off quick closing electromagnetic valve is provided with emergency power supply;

[0019] A signal transfer module in the original shutdown system is cancelled, and when any power-off quick closing electromagnetic valve loses power, a direct connection channel of the fault signal and the trip instruction is established.

[0020] Preferably, based on a double power-off quick closing electromagnetic valve parallel oil path design, two independent physically isolated oil paths are led out from the hydraulic cylinder quick closing cavity and are connected to the oil inlet of the 1.2DT and 1.3DT power-off quick closing electromagnetic valves respectively, when any power-off quick closing electromagnetic valve loses power, the spring force can be used to conduct the oil leakage oil path, the hydraulic cylinder quick closing cavity pressure is released, and the power-off quick closing electromagnetic valve that loses power completes the closing action.

[0021] Preferably, when any loss of power quick closing type electromagnetic valve loses power, the electrical system modification module starts the emergency power supply loop of the UPS power series emergency stop button to provide 300 ms emergency power supply to the loss of power quick closing type electromagnetic valve that loses power.

[0022] Preferably, the normally closed contact of the relay connected in the emergency power supply loop of the UPS power series emergency stop button is replaced by a normally open contact, and the tripping loop is reconstructed as: protection signal→intermediate relay KA closed→relay coil powered on→relay normally open contact closed→loss of power quick closing type electromagnetic valve loses power→loss of power quick closing type electromagnetic valve valve closed.

[0023] Compared with the prior art, the beneficial effects of the emergency shutdown method of the coal gas quick switching valve based on triple cooperative redundancy provided by the present application are the same as those of the emergency shutdown system of the coal gas quick switching valve based on triple cooperative redundancy provided by the above technical solution, and are not described here.

[0024] The present application also provides another emergency shutdown method of a coal gas quick switching valve based on triple cooperative redundancy, which comprises:

[0025] Real-time monitoring of loss of power failure signals of loss of power quick closing type electromagnetic valves;

[0026] When the loss of power quick closing type electromagnetic valve loses power;

[0027] The distributed control system (DCS) directly issues a tripping instruction, and the signal transmission time is ≤200 ms;

[0028] The emergency power supply loop of the UPS power series emergency stop button is activated and turned on to form a current path and provide emergency power supply for the loss of power quick closing type electromagnetic valve;

[0029] The loss of power quick closing type electromagnetic valve is triggered by loss of power, and the spool is turned on to release the oil leakage oil circuit under the action of the spring force, and the time is ≤50 ms;

[0030] The pressure of the quick closing cavity of the hydraulic oil cylinder is released, and the loss of power quick closing type electromagnetic valve completes the closing action within ≤0.4 seconds.

[0031] Compared with the prior art, the emergency shutdown method of the coal gas quick switching valve based on triple cooperative redundancy provided by the present application has the following beneficial effects: the present application takes the loss of power of the loss of power quick closing type electromagnetic valve as the trigger condition, controls the emergency shutdown time of the coal gas quick switching valve within 0.4 seconds through the hydraulic self-control oil leakage, the UPS emergency power supply and the distributed control system (DCS) direct tripping three links, greatly improves the shutdown speed and safety, avoids single failure by multiple link protection, and realizes rapid, reliable and seamless shutdown.

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of an emergency shut-off system for a gas quick-cut valve based on triple collaborative redundancy provided in an embodiment of the present invention is shown.

[0035] Figure 2 The flowchart illustrates an emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy provided in an embodiment of the present invention.

[0036] Figure 3 The flowchart of another emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy provided in an embodiment of the present invention is shown.

[0037] Figure 4 A schematic diagram of the fast-switching solenoid valve provided in an embodiment of the present invention is shown;

[0038] Figure 5 The diagram shows the hydraulic circuit schematic of the gas quick-cut valve emergency shut-off system based on triple collaborative redundancy provided in this embodiment of the invention.

[0039] Figure 6 The diagram shows the electrical control principle of the gas quick-cut valve emergency shut-off system based on triple collaborative redundancy provided in the embodiment of the present invention. Detailed Implementation

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically limited.

[0042] Embodiment one

[0043] Figure 1 A structure diagram of a triple coordination redundancy-based coal gas quick switching valve emergency shutdown system is shown, as shown in Figure 1 The system comprises:

[0044] The hydraulic system modification module 1 is used to replace the powered quick closing electromagnetic valve in the original shutdown system with a de-energized quick closing electromagnetic valve, based on the parallel oil path design of double de-energized quick closing electromagnetic valves, and when any de-energized quick closing electromagnetic valve loses power, the spring force can be used to open the oil leakage oil path, so that the hydraulic cylinder quick closing cavity pressure is released, and the de-energized de-energized quick closing electromagnetic valve completes the closing action.

[0045] It should be noted that, as shown in Figure 4 The original powered quick closing electromagnetic valve is replaced with a de-energized quick closing electromagnetic valve, and the model can be 4WE10V33 / CG24N9K4. The modification directly determines the action characteristics of the valve when the power is interrupted, and provides a physical execution terminal for the electrical system.

[0046] Specifically, as shown in Figure 4 The original model 4WE10D33 powered quick closing electromagnetic valve is removed, and the model 4WE10V33 de-energized quick closing electromagnetic valve is installed. The technical parameters of the de-energized quick closing electromagnetic valve can be: working pressure 31.5Mpa, oil port diameter Response time ≤80ms.

[0047] Further, as shown in Figure 5 The oil path connection scheme is,

[0048] (1) The starting point of the main oil path: the hydraulic cylinder quick closing cavity is used as the hydraulic power output end, and constitutes the starting node of the oil path system.

[0049] (2) Parallel shunt structure: two independent oil path channels are drawn from the hydraulic cylinder quick closing cavity to form a parallel architecture. The first oil path channel is connected to the oil inlet of the 1.2DT de-energized quick closing electromagnetic valve, and the second oil path channel is connected to the oil inlet of the 1.3DT de-energized quick closing electromagnetic valve. The two oil paths are physically isolated and have no cross connection.

[0050] (3) Solenoid operating characteristics: 1.2DT and 1.3DT loss of power quick closing solenoid valve are all designed as loss of power on type, normal power on state: block oil leakage oil way, maintain valve opening. Loss of power state: valve core automatically switches to on position under the action of spring force, connects oil leakage channel.

[0051] (4) Oil leakage path: when any loss of power quick closing solenoid valve is on, high pressure oil→loss of power quick closing solenoid valve oil leakage port→oil tank, so that the pressure in the hydraulic cylinder quick closing cavity is rapidly released, and the loss of power quick closing solenoid valve completes the closing action.

[0052] In the hydraulic system modification module, the power-on quick closing solenoid valve is replaced by the loss of power quick closing solenoid valve, so that the valve is automatically closed by using the spring force when power is off, the problem of traditional valve loss of power is solved, the single point failure risk is eliminated by the dual solenoid valve redundancy design, the millisecond level response makes the accident rate reduced by more than 90%, and the loss of power closing time is measured from the original >15 seconds to 0.4 seconds. That is to say, when the loss of power quick closing solenoid valve is opened, it is supported by hydraulic pressure, and if it needs to be quickly closed, the hydraulic oil in the cylinder needs to be quickly discharged, so that the loss of power quick closing solenoid valve can complete the closing action.

[0053] The electrical system modification module 2 is used for constructing an emergency power supply circuit of a UPS power supply series emergency stop button, and provides emergency power supply for the loss of power quick closing solenoid valve when any loss of power quick closing solenoid valve loses power.

[0054] It should be noted that in the electrical system modification module, when any loss of power quick closing solenoid valve loses power, the electrical system modification module starts the emergency power supply circuit of the UPS power supply series emergency stop button, and provides 300 ms emergency power supply for the loss of power quick closing solenoid valve.

[0055] Figure 6 The electrical control principle diagram of the coal gas quick switching valve emergency shutdown system based on triple redundancy provided by the embodiment of the application is shown, which shows the positions and logical relationships of relays, solenoids, and other electrical components. Figure 6 As shown in the figure, an emergency power supply circuit of a UPS power supply series emergency stop button is constructed to provide emergency power supply for the solenoid valve of the hydraulic system modification module 1, and forms a hardware response link with the control program optimization module 3.

[0056] Specifically, the modification process of the electrical system modification module 2 is that an emergency stop button is additionally arranged at the output end of the UPS power supply, the type of the emergency stop button can be LA39-11, and a 6mm 2 flame-retardant cable is connected, and the type of the flame-retardant cable can be ZR-YJV.

[0057] Further, as Figure 6As shown, the modification method of the emergency power supply circuit relay of the UPS power supply series emergency stop button is to replace the normally closed contact of the relay connected in the circuit with a normally open contact. The electromagnetic valve is normally closed in the previous state, and is powered to open in the abnormal state. After modification, the electromagnetic valve is normally open in the previous state, and is powered off to close in the abnormal state. The trip circuit is reconstructed as: protection signal→intermediate relay KA closed→relay coil powered on→relay normally open contact closed→power-off quick closing electromagnetic valve powered off→power-off quick closing electromagnetic valve valve closed.

[0058] The control program optimization module 3 is used to cancel the signal transfer module in the original shutdown system, and when any power-off quick closing electromagnetic valve is powered off, a direct connection channel of the fault signal and the trip instruction is established.

[0059] It should be noted that the control program optimization module 3 is used to cancel the signal transfer module in the original shutdown system, and a direct trip mechanism of the distributed control system DCS is realized. When any power-off quick closing electromagnetic valve is powered off, a direct connection channel of the fault signal and the trip instruction is established, a millisecond level action instruction is sent to the electrical system modification module 2, and the hydraulic system modification module 1 is triggered to perform emergency shutdown.

[0060] It can be understood that the safety redundancy design of the application has a triple redundancy guarantee mechanism, which covers different fault scenarios: when the main power fails, the UPS power supply series emergency stop button emergency power supply circuit is relied on for emergency power supply, when the UPS emergency power supply circuit fails, the electromagnetic valve mechanical action of the hydraulic system modification module 1 is relied on, and when the DCS communication fails, the hard-wired trigger is relied on, so that any link failure does not affect the overall shutdown function.

[0061] Specifically, in the main power failure scenario, the electrical system modification module 2 starts the UPS series emergency stop circuit, and continuously supplies power to the power-off quick closing valve of the hydraulic system modification module 1 for 300 milliseconds; in the UPS failure scenario, the power-off quick closing valve of the hydraulic system modification module 1 is automatically activated, and the mechanical type closing is realized by using the spring force; in the DCS communication failure scenario, the electrical system modification module 2 directly triggers the trip through hard-wired, and the normally open contact of the relay is reconstructed to ensure the positive signal transmission.

[0062] Further, the action chain of the control program optimization module 3 before and after the trip modification is:

[0063] The action chain before the trip modification is: fault signal→PLC logic processing 800ms→relay conversion 400ms→electromagnetic valve response 800ms→valve action→time consumption≥2.0s.

[0064] Post-tripping action chain: Control layer: fault signal → DCS direct trip 200ms; Electrical system upgrade module: UPS activation + emergency stop conduction 150ms; Hydraulic layer: solenoid valve de-energization action 50ms → total time ≤ 0.4 seconds, response efficiency improved to 20% of the original system. In control program optimization module 3, the PLC signal relay link is eliminated, establishing a direct DCS tripping mechanism, compressing the signal transmission time from over 800ms to 200ms, significantly improving response efficiency. Table 1 shows the time optimization verification data before and after the tripping upgrade, and Table 2 shows the time optimization verification data before and after the triple collaborative redundancy upgrade.

[0065] Table 1. Verification data on time optimization before and after tripping modification.

[0066] Stage Signal transmission path Time-consuming Before modification Sensor→PLC→relay→actuator 2.0s After modification Sensor→PLC→actuator 1.0s

[0067] Table 2. Time optimization verification data before and after triple collaborative redundancy modification.

[0068] Test item Before modification After modification Power-off closing time > 15 s (failure) 0.4s Trip response time 2.0s 1.0s Single-point fault tolerance None Dual valve redundancy guarantee

[0069] Compared with the prior art, the emergency shut-off system for gas quick-cut valve based on triple cooperative redundancy provided in this embodiment of the invention has the following beneficial effects:

[0070] 1. The hydraulic system upgrade module replaces the energized fast-closing solenoid valve with a de-energized fast-closing type, enabling automatic oil release and valve closure upon power failure. This solves the problem of traditional valves failing to operate when power is lost. A dual-solenoid valve parallel oil circuit is used, ensuring pressure release and valve closure even if either solenoid valve fails. A hard-wired circuit connecting the UPS power supply to the emergency stop button ensures 300ms of emergency power supply, creating redundancy with the hydraulic system upgrade module. The DCS direct-jump mechanism compresses signal transmission to 200ms, improving efficiency by 80%.

[0071] 2. The entire process from fault detection to valve closure takes ≤0.4 seconds, with seamless coordination between each step. After a fault signal is triggered, the DCS directly issues a trip command, the electrical system simultaneously activates emergency power supply, and the hydraulic system rapidly depressurizes, ultimately achieving ultra-fast closure of the quick-closing valve.

[0072] 3. The total emergency shutdown time is ≤0.4 seconds, which is 80% more efficient than the traditional system response time of ≥2 seconds, far exceeding the safety time window requirement. Triple safety redundancy design eliminates the risk of single point of failure, achieving a 99.99% UPS emergency power supply success rate and reducing the accident rate by over 90%.

[0073] 4. The existing coal gas main pipeline quick cut valve can be seamlessly reformed, the risk of gas leakage and explosion is greatly reduced, it is suitable for the safety field of industrial pipeline related to high-risk fluid such as chemical industry, coking and natural gas transportation, and meets the hard requirement of the key facility "intrinsic safety" in the "industrial safety action plan". The system has the characteristics of double valve redundancy design and millisecond level response, has strong reformation compatibility and controllable implementation cost, can directly replace old equipment, provides a safe cut solution with high reliability and ultra-fast speed for process industry, effectively protects personnel and equipment safety, reduces accident risk, and has great market potential.

[0074] The embodiment of the present application also provides a coal gas quick cut valve emergency cut-off method based on triple cooperative redundancy, Figure 2 The flow chart of the coal gas quick cut valve emergency cut-off method based on triple cooperative redundancy provided by the embodiment of the present application is shown, as shown in the figure, Figure 2 The method comprises the following steps.

[0075] Step S11: the power-on quick closing type electromagnetic valve in the original cut-off system is replaced by a power-off quick closing type electromagnetic valve, based on the parallel oil path design of the double power-off quick closing type electromagnetic valve, when any power-off quick closing type electromagnetic valve loses power, the spring force can be used to conduct the oil leakage oil path, so that the pressure of the hydraulic cylinder quick closing cavity is released, and the power-off quick closing type electromagnetic valve that loses power completes the closing action.

[0076] It should be noted that based on the parallel oil path design of the double power-off quick closing type electromagnetic valve, two independent physically isolated oil paths are led out from the hydraulic cylinder quick closing cavity and are connected to the oil inlet of the 1.2DT and 1.3DT power-off quick closing type electromagnetic valves respectively, when any power-off quick closing type electromagnetic valve loses power, the spring force can be used to conduct the oil leakage oil path, so that the pressure of the hydraulic cylinder quick closing cavity is released, and the power-off quick closing type electromagnetic valve that loses power completes the closing action.

[0077] Step S12: an emergency power supply loop of the UPS power supply in series with the emergency stop button is constructed, and when any power-off quick closing type electromagnetic valve loses power, the power-off quick closing type electromagnetic valve is provided with emergency power supply.

[0078] It should be noted that when any power-off quick closing type electromagnetic valve loses power, the electrical system reforming module starts the emergency power supply loop of the UPS power supply in series with the emergency stop button, and provides 300ms emergency power supply to the power-off power-off quick closing type electromagnetic valve. Further, the normally closed contact of the relay connected in the emergency power supply loop of the UPS power supply in series with the emergency stop button is replaced by a normally open contact. Before the reform, the electromagnetic valve is normally closed, and when there is an abnormal condition, the electromagnetic valve is powered on and then opened. After the reform, the electromagnetic valve is normally open, and when there is an abnormal condition, the electromagnetic valve loses power and then closes. The trip circuit is reconstructed as: protection signal→intermediate relay KA closed→relay coil powered on→relay normally open contact closed→power-off quick closing type electromagnetic valve loses power→power-off quick closing type electromagnetic valve valve closed.

[0079] Step S13: cancel the signal transfer module in the original cut-off system, when any de-energized quick closing electromagnetic valve is de-energized, a direct connection channel of fault signal and tripping instruction is established.

[0080] Compared with the prior art, the beneficial effects of the emergency cut-off method of the gas quick cut valve based on triple synergistic redundancy provided by the embodiments of the application are the same as those of the emergency cut-off system of the gas quick cut valve based on triple synergistic redundancy provided by the above technical solutions, and will not be repeated here.

[0081] Embodiment two

[0082] The embodiments of the application also provide another emergency cut-off method of a gas quick cut valve based on triple synergistic redundancy, Figure 3 The flowchart of another emergency cut-off method of a gas quick cut valve based on triple synergistic redundancy provided by the embodiments of the application is shown, as shown in the figure, Figure 3 The method comprises the following steps:

[0083] Step S21: real-time monitoring of de-energization fault signals of de-energized quick closing electromagnetic valves;

[0084] Step S22: when de-energization faults occur in the de-energized quick closing electromagnetic valves;

[0085] Step S23: the distributed control system (DCS) directly issues a tripping instruction, and the signal transmission time is ≤200 ms;

[0086] Step S24: the emergency power supply loop of the UPS power supply in series with the emergency stop button is activated and turned on, forming a current path and providing emergency power supply for the de-energized quick closing electromagnetic valve;

[0087] Step S25: the de-energized quick closing electromagnetic valve is triggered due to de-energization, and the valve core is turned on under the action of spring force to release the oil drain oil circuit, and the time consumption is ≤50 ms;

[0088] Step S26: the pressure of the quick closing cavity of the hydraulic oil cylinder is released, and the de-energized quick closing electromagnetic valve completes the closing action within ≤0.4 seconds.

[0089] Specifically, the triple synergistic working process is:

[0090] (1) Fault detection stage: when the system detects a de-energization fault signal.

[0091] (2) Control layer response stage: the optimized DCS control program directly issues a tripping instruction within 1 second, and cancels the original system intermediate relay signal conversion link.

[0092] (3) Electrical layer execution stage: the UPS emergency power supply loop is immediately activated, and the emergency stop button circuit is turned on to form a current path.

[0093] (4) Hydraulic layer action stage: the power-off quick closing electromagnetic valve is automatically triggered due to power interruption, and the valve core is guided to the oil drain channel under the action of spring force.

[0094] (5) Valve closing stage: the quick closing cavity pressure of the hydraulic cylinder is released, and the quick cutting valve completes the closing action within 0.4 seconds.

[0095] Compared with the prior art, the emergency shutdown method of the coal gas quick cutting valve based on triple cooperative redundancy provided by the embodiment of the present application has the following beneficial effects: the present application takes power-off of the power-off quick closing electromagnetic valve as a trigger condition, and controls the emergency shutdown time of the coal gas quick cutting valve within 0.4 seconds through triple links of hydraulic self-control oil drain, UPS emergency power supply and distributed control system (DCS) direct jump, which greatly improves the shutdown speed and safety, avoids single failure failure by multi-link protection, and realizes rapid, reliable and seamless shutdown.

[0096] In addition, the embodiment of the present application further provides an electronic device, which comprises a bus, a transceiver, a memory, a processor and a computer program stored in the memory and executable on the processor, the transceiver, the memory and the processor are connected through the bus respectively, the computer program realizes each process of the above-mentioned emergency shutdown method of the coal gas quick cutting valve based on triple cooperative redundancy when the computer program is executed by the processor, and the same technical effects can be achieved, and details are not repeated here to avoid repetition.

[0097] In addition, the embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and each process of the above-mentioned emergency shutdown method of the coal gas quick cutting valve based on triple cooperative redundancy is realized when the computer program is executed by the processor, and the same technical effects can be achieved, and details are not repeated here to avoid repetition.

[0098] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacement technical solutions within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An emergency shut-off system for gas quick-cut valves based on triple collaborative redundancy, characterized in that, include: The hydraulic system modification module is used to replace the energized fast-closing solenoid valve in the original shut-off system with the de-energized fast-closing solenoid valve. Based on the parallel oil circuit design of the dual de-energized fast-closing solenoid valves, when either de-energized fast-closing solenoid valve loses power, the drain oil circuit can be opened by spring force, so that the pressure in the fast-closing chamber of the hydraulic cylinder is released, and the de-energized fast-closing solenoid valve completes the closing action. The electrical system upgrade module is used to construct an emergency power supply circuit for the UPS power supply in series with the emergency stop button, providing emergency power to the fast-closing solenoid valve when any of the fast-closing solenoid valves loses power. The control program optimization module is used to eliminate the signal relay module in the original cut-off system. When any power-off fast-closing solenoid valve loses power, a direct connection channel between the fault signal and the trip command is established.

2. The emergency shut-off system for a gas quick-cut valve based on triple collaborative redundancy according to claim 1, characterized in that, In the hydraulic system modification module, based on the parallel oil circuit design of dual power-off fast-closing solenoid valves, two independent physically isolated oil circuits are led out from the fast-closing chamber of the hydraulic cylinder and connected to the oil inlet of the 1.2DT and 1.3DT power-off fast-closing solenoid valves respectively. When either power-off fast-closing solenoid valve loses power, the drain oil circuit can be opened by spring force, so that the pressure in the fast-closing chamber of the hydraulic cylinder is released, and the power-off fast-closing solenoid valve completes the closing action.

3. The emergency shut-off system for a gas quick-cut valve based on triple collaborative redundancy according to claim 1 or 2, characterized in that, The power-off quick-closing solenoid valve has a working pressure of 31.5 MPa and an oil port diameter of [missing information]. Response time ≤ 80ms.

4. The emergency shut-off system for a gas quick-cut valve based on triple collaborative redundancy according to claim 1, characterized in that, In the electrical system upgrade module, when any power failure fast-closing solenoid valve loses power, the electrical system upgrade module activates the emergency power supply circuit of the UPS power supply connected in series with the emergency stop button to provide 300ms of emergency power supply to the power failure fast-closing solenoid valve.

5. A gas quick-cut valve emergency shut-off system based on triple collaborative redundancy according to claim 1 or 4, characterized in that, In the emergency power supply circuit of the UPS power supply series emergency stop button, the normally closed contact of the relay connected to it is replaced with a normally open contact. The trip circuit is reconfigured as follows: protection signal → intermediate relay KA closes → relay coil is energized → relay normally open contact closes → power failure fast-closing solenoid valve is de-energized → power failure fast-closing solenoid valve closes.

6. An emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy, characterized in that, Replace the energized fast-closing solenoid valve in the original shut-off system with an energized fast-closing solenoid valve. Based on the parallel oil circuit design of the dual energized fast-closing solenoid valves, when either energized fast-closing solenoid valve loses power, the drain oil circuit can be opened by spring force, so that the pressure in the fast-closing chamber of the hydraulic cylinder is released, and the energized fast-closing solenoid valve completes the closing action. Construct an emergency power supply circuit for the UPS power supply in series with the emergency stop button, so as to provide emergency power to the fast-closing solenoid valve when any of the fast-closing solenoid valves loses power; The signal relay module in the original cut-off system is removed, and a direct connection channel between the fault signal and the trip command is established when any power-off fast-closing solenoid valve loses power.

7. The emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy according to claim 6, characterized in that, Based on the parallel oil circuit design of dual power failure fast-closing solenoid valves, two independent physically isolated oil circuits are led out from the fast-closing chamber of the hydraulic cylinder and connected to the oil inlet of the 1.2DT and 1.3DT power failure fast-closing solenoid valves respectively. When either power failure fast-closing solenoid valve loses power, the drain oil circuit can be opened by spring force, so that the pressure in the fast-closing chamber of the hydraulic cylinder is released, and the power failure fast-closing solenoid valve completes the closing action.

8. The emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy according to claim 7, characterized in that, When any of the fast-closing solenoid valves loses power, the electrical system upgrade module activates the emergency power supply circuit of the UPS power supply connected in series with the emergency stop button, providing 300ms of emergency power to the lost fast-closing solenoid valve.

9. An emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy as described in claim 7 or 8, characterized in that, In the emergency power supply circuit of the UPS power supply series emergency stop button, the normally closed contact of the relay connected to it is replaced with a normally open contact. The trip circuit is reconfigured as follows: protection signal → intermediate relay KA closes → relay coil is energized → relay normally open contact closes → power failure fast-closing solenoid valve is de-energized → power failure fast-closing solenoid valve closes.

10. An emergency shut-off method for a gas quick-cut valve based on triple collaborative redundancy, characterized in that, include: Real-time monitoring of power failure fault signals of fast-closing solenoid valves; When a fast-closing solenoid valve fails to operate due to power failure... The distributed control system (DCS) directly issues trip commands, with signal transmission time ≤200ms. The emergency power supply circuit of the UPS power supply connected in series with the emergency stop button is activated and conduction is formed, creating a current path to provide emergency power to the fast-closing solenoid valve in case of power failure. When a power-off quick-closing solenoid valve is triggered by a power failure, the valve core opens the drain oil passage under the action of spring force, with a time ≤50ms. The hydraulic cylinder's quick-closing chamber pressure is released, and the de-energized quick-closing solenoid valve completes the closing action within ≤0.4 seconds.

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