Dual pneumatic valve synchronous control and joint feedback control system, method and terminal

Abstract

The application provides a kind of double pneumatic valve synchronous control and joint feedback control system, method and terminal, set control terminal, contactor, first pneumatic valve, second pneumatic valve, solenoid valve, pressure monitor, pressure sensor and valve control connection device;When pressure monitor determines that pressure data is normal and control terminal controls contactor to be connected, solenoid valve is powered, drives first pneumatic valve to open, second pneumatic valve to close;When pressure data is abnormal or control terminal controls contactor to be disconnected, solenoid valve is powered off, drives first pneumatic valve to close, second pneumatic valve to open;When control terminal detects that valve position feedback signal and control signal do not match, trigger alarm and execute corresponding operation.The application can realize double pneumatic valve synchronous control, synchronous action, synchronous feedback and fault alarm protection, structure layout is reasonable, signal link is clear, safety disposal mode is flexible, effectively improves the precision, reliability and working condition adaptability of marine and land double valve group reverse opening and closing control.

Description

Technical Field

[0001] This invention relates to the field of electrical control technology, and in particular to a control system, method and terminal for synchronous control and joint feedback of dual pneumatic valves. Background Technology

[0002] In marine and land-based industrial fluid transport and pipeline media switching applications, there is a common requirement for a set of pneumatic valves to operate in opposite directions, meaning two pneumatic valves maintain a mutually exclusive linkage state, one open and one closed. To ensure sensitive and reliable valve group operation and to guarantee that a set of valves strictly adheres to the one-on-one opening and closing mechanism, the industry typically adopts an architecture combining pneumatic drive and electric control. This enables fluid flow direction switching, pipeline redundancy switching, and safety isolation under abnormal operating conditions, and is a commonly used basic control configuration in marine pipelines and land-based chemical and energy transport systems.

[0003] While existing dual pneumatic valve control schemes generally employ pneumatic drive and electric control, they still have significant drawbacks. They cannot achieve synchronous control, synchronous action, synchronous feedback, and fault linkage alarm for a set of dual pneumatic valves. The valve group has low mutual exclusion opening and closing accuracy, lacks effective valve position status verification and abnormal alarm mechanisms, and has poor control reliability and adaptability to operating conditions. They are unable to meet the requirements of stable, safe, and precise linkage control of dual pneumatic valves in marine and land-based pipeline systems. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a control system, method and terminal for synchronous control and joint feedback of dual pneumatic valves, which solves the technical problems that existing dual pneumatic valve control schemes cannot achieve synchronous control, synchronous action, synchronous feedback and fault alarm.

[0005] To achieve the above and other related objectives, the present invention provides a control system for synchronous control and joint feedback of dual pneumatic valves. The system includes: a control terminal, a contactor, a first pneumatic valve, a second pneumatic valve, a solenoid valve, a pressure monitor, a pressure sensor, and a valve control connection device. The drive heads of both the first and second pneumatic valves are connected to the solenoid valve via air circuits. The pressure sensor is installed on the pipeline upstream of the first and second pneumatic valves to detect pressure data in the pipeline upstream of the valves. The contactor is electrically connected to both the control terminal and the pressure monitor to receive control signals from the control terminal. The control device connects to the control terminal, pressure monitor, solenoid valve, first pneumatic valve, and second pneumatic valve when the control signal is not received. The contactor, pressure monitor, and solenoid valve form the power supply circuit for the solenoid valve. The pressure monitor, connected to the pressure sensor and control terminal, collects pressure data detected by the pressure sensor and uploads it to the control terminal. The pressure monitor is configured to perform the following operations: when the acquired pressure data is normal, it controls the connection of the power supply circuit for the solenoid valve; when the acquired pressure data is abnormal, it controls the disconnection of the power supply circuit for the solenoid valve. The control terminal outputs control signals and triggers an alarm and performs corresponding operations when the acquired open / closed position feedback signal of the first or second pneumatic valve does not match the control signal. When the contactor is connected and the pressure monitor controls the connection of the power supply circuit for the solenoid valve, the solenoid valve is energized, thereby driving the first pneumatic valve to open and the second pneumatic valve to close.

[0006] When the contactor is disconnected, or when the pressure monitor controls the disconnection of the power supply circuit of the solenoid valve, the solenoid valve is de-energized, thereby driving the first pneumatic valve to close and the second pneumatic valve to open.

[0007] In one embodiment of the present invention, the control terminal is provided with: a first control interface, connected to the pressure monitor, for supplying power to the pressure monitor and acquiring pressure data; and a second control interface, connected to the valve control connection device, for acquiring the opening and closing position feedback signals of the first pneumatic valve and the second pneumatic valve.

[0008] In one embodiment of the present invention, the second control interface is an interface used to acquire the opening and closing position feedback signals of the first pneumatic valve and the second pneumatic valve.

[0009] In one embodiment of the present invention, the second control interface employs two interfaces, one of which is used to acquire the open / closed position feedback signal of the first pneumatic valve; the other interface is used to acquire the open / closed position feedback signal of the second pneumatic valve.

[0010] In one embodiment of the present invention, the pressure monitor includes: a control connection port connected to a first control interface for receiving power and sending pressure data to a control terminal; a sensor connection port connected to a pressure sensor for supplying power to the pressure sensor and acquiring detected pressure data from the pressure sensor; a contactor connection port connected to a contactor for receiving control signals; and a valve control connection port connected to a valve control connection device for outputting control signals. When the pressure monitor determines that the pressure data received through the control connection port is normal, the control contactor connection port is connected to the valve control connection port; when the pressure monitor determines that the pressure data received through the control connection port is abnormal, the control contactor connection port is disconnected from the valve control connection port.

[0011] In one embodiment of the present invention, the valve control connection device is provided with: a pressure monitor access port, a valve control connection port for connecting the pressure monitor and a solenoid valve; and a control access port, a second control interface for connecting the control terminal, a first pneumatic valve and a second pneumatic valve, for feeding back the opening and closing position feedback signals of the first pneumatic valve and the second pneumatic valve to the second control interface.

[0012] In one embodiment of the present invention, the valve control connection device is a junction box.

[0013] In one embodiment of the present invention, when a mismatch is detected between the acquired open / closed position feedback signal of the first or second pneumatic valve and the control signal, an alarm is triggered and a corresponding operation is performed according to a preset safety mechanism. The safety mechanism includes: an over-control mechanism, comprising: maintaining the current energized state of the solenoid valve and continuously acquiring the open / closed position feedback signal; a direct cut-off mechanism, immediately cutting off the control signal output of the control terminal to de-energize the solenoid valve, driving the first pneumatic valve to close and the second pneumatic valve to open; and a delayed cut-off mechanism, starting a preset delay timer, maintaining the current energized state of the solenoid valve during the delay period, and continuously acquiring the open / closed position feedback signal; if the open / closed position feedback signal still does not match the control signal after the delay ends, then the control signal output of the control terminal is cut off; if the signal matches the control signal during the delay period, then the delay is terminated.

[0014] To achieve the above and other related objectives, this invention provides a control method for synchronous control and joint feedback of dual pneumatic valves, applied to the aforementioned control system for synchronous control and joint feedback of dual pneumatic valves. The method includes: when the pressure monitor determines that the acquired pressure data is normal, controlling the connection of the power supply circuit of the solenoid valve and when the contactor is activated, energizing the solenoid valve, thereby driving the first pneumatic valve to open and the second pneumatic valve to close; when the pressure monitor determines that the acquired pressure data is abnormal, controlling the disconnection of the power supply circuit of the solenoid valve, or when the contactor is deactivated, de-energizing the solenoid valve, thereby driving the first pneumatic valve to close and the second pneumatic valve to open; when the control terminal detects a mismatch between the acquired feedback signal of the open / closed position of the first or second pneumatic valve and the control signal, triggering an alarm and executing corresponding operations.

[0015] To achieve the above and other related objectives, the present invention provides an electronic terminal, comprising: one or more memories and one or more processors; the one or more memories being used to store a computer program; and the one or more processors being connected to the memories and used to run the computer program to perform the method described.

[0016] As described above, this invention is a control system, method, and terminal for synchronous control and joint feedback of dual pneumatic valves, which has the following beneficial effects: This invention includes a control terminal, a contactor, a first pneumatic valve, a second pneumatic valve, a solenoid valve, a pressure monitor, a pressure sensor, and valve control connection devices. When the pressure monitor determines that the pressure data is normal and the control terminal controls the contactor to be on, the solenoid valve is energized, driving the first pneumatic valve to open and the second pneumatic valve to close. When the pressure data is abnormal or the control terminal controls the contactor to be off, the solenoid valve is de-energized, driving the first pneumatic valve to close and the second pneumatic valve to open. When the control terminal detects a mismatch between the valve position feedback signal and the control signal, an alarm is triggered and corresponding operations are performed. This invention can achieve synchronous control, synchronous action, synchronous feedback, and fault alarm protection of dual pneumatic valves. It has a reasonable structural layout, clear signal links, and flexible safety handling modes, effectively improving the accuracy, reliability, and adaptability of reverse opening and closing control of marine and land-based dual valve groups. Attached Figure Description

[0017] Figure 1 The diagram shown is a schematic diagram of the air circuit connection between the solenoid valve and the dual pneumatic valve in one embodiment of the present invention.

[0018] Figure 2 The diagram shows the installation position of the pressure sensor in one embodiment of the present invention.

[0019] Figure 3 The diagram shown is a schematic diagram of the connection between the control terminal and the contactor in one embodiment of the present invention.

[0020] Figure 4The diagram shown is a structural schematic of a control system for synchronous control and joint feedback of dual pneumatic valves according to an embodiment of the present invention.

[0021] Figure 5 The diagram shown is a structural schematic of a control system for synchronous control and joint feedback of dual pneumatic valves according to an embodiment of the present invention.

[0022] Figure 6 The diagram shown is a structural schematic of a control system for synchronous control and joint feedback of dual pneumatic valves according to an embodiment of the present invention.

[0023] Figure 7 The diagram shown is a structural schematic of a control system for synchronous control and joint feedback of dual pneumatic valves according to an embodiment of the present invention.

[0024] Figure 8 The diagram shown is a structural schematic of an electronic terminal according to an embodiment of the present invention. Detailed Implementation

[0025] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0026] It should be noted that in the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the invention. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical system, and operation may be made without departing from the spirit and scope of the invention. The following detailed description should not be considered limiting, and the scope of the embodiments of the invention is defined only by the claims of the published patents. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. Spatially related terms, such as “upper,” “lower,” “left,” “right,” “below,” “below,” “lower part,” “above,” “upper part,” etc., may be used herein to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0027] Throughout this specification, when it is said that a part is "connected" to another part, this includes not only "direct connection" but also "indirect connection" by placing other elements in between. Furthermore, when it is said that a part "includes" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather means that other constituent elements may also be included.

[0028] The terms "first," "second," and "third," etc., used herein are for the purpose of describing various parts, components, regions, layers, and / or segments, but are not limiting. These terms are used only to distinguish one part, component, region, layer, or segment from others. Therefore, the "first part," "component," "region," "layer," or "segment" described below may refer to a "second part," "component," "region," "layer," or "segment" without departing from the scope of this invention.

[0029] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0030] This invention provides a control system for synchronous control and joint feedback of dual pneumatic valves. It includes a control terminal, a contactor, a first pneumatic valve, a second pneumatic valve, a solenoid valve, a pressure monitor, a pressure sensor, and valve control connection devices. When the pressure monitor determines the pressure data is normal and the control terminal controls the contactor to be on, the solenoid valve is energized, driving the first pneumatic valve to open and the second pneumatic valve to close. When the pressure data is abnormal or the control terminal controls the contactor to be off, the solenoid valve is de-energized, driving the first pneumatic valve to close and the second pneumatic valve to open. When the control terminal detects a mismatch between the valve position feedback signal and the control signal, an alarm is triggered and corresponding operations are executed. This invention enables synchronous control, synchronous action, synchronous feedback, and fault alarm protection of dual pneumatic valves. It features a reasonable structural layout, clear signal links, and flexible safety handling modes, effectively improving the accuracy, reliability, and adaptability of reverse opening and closing control of dual valve groups for marine and land-based applications.

[0031] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement it. The present invention can be embodied in many different forms and is not limited to the embodiments described herein.

[0032] This invention discloses a control system for synchronous control and joint feedback of dual pneumatic valves, as shown in Figures 1-1. Figure 4As shown, the system mainly consists of a control terminal 1, a contactor 2, a first pneumatic valve 3, a second pneumatic valve 4, a solenoid valve 5, a pressure monitor 6, a pressure sensor 7, and a valve control connection device 8. The system achieves interlocking and mutually exclusive opening and closing of the two pneumatic valves, real-time acquisition of pipeline pressure, interlocked power supply for the circuit, and dual joint feedback control of valve position and pressure. The specific structure and working principle are as follows:

[0033] As shown in Figure 1, the drive heads of the first pneumatic valve 3 and the second pneumatic valve 4 are both connected to the solenoid valve 5 via air passages. The solenoid valve 5 controls the air passage's opening and closing states to achieve mutually exclusive synchronous opening and closing of the two pneumatic valves: When the solenoid valve is de-energized: 1-2 is on, controlling air to synchronously enter the two pneumatic valve drive heads; the first pneumatic valve 3 drive head receives air and compresses the spring, causing the valve shaft to rotate clockwise to close the valve; the second pneumatic valve 4 drive head receives air and compresses the spring, causing the valve shaft to rotate counterclockwise to open the valve. When the solenoid valve is energized: air passage 1-2 is cut off, and the venting end is on; the two pneumatic valve drive heads synchronously vent, and the springs return to their original position and extend; the first pneumatic valve 3 valve shaft rotates counterclockwise to open the valve, and the second pneumatic valve 4 valve shaft rotates clockwise to close the valve.

[0034] As shown in Figure 2, pressure sensors 7 are uniformly installed on the upstream pipelines of the first pneumatic valve 3 and the second pneumatic valve 4. Fluid flows within the pipelines in the direction of the arrows shown, and after being diverted by the first and second pneumatic valves 3 and 4, it is delivered to the target equipment. Pressure sensors 7 collect real-time pipeline pressure data upstream of the first and second pneumatic valves 3 and 4. The opening and closing combination of the two pneumatic valves determines the direction of fluid delivery in the pipeline, providing a data source for subsequent pressure feedback control.

[0035] As shown in Figure 3 and Figure 4 As shown, contactor 2 is electrically connected to control terminal 1 and pressure monitor 6 respectively. Contactor 2 conducts when it receives a control signal from control terminal 1 and disconnects when it does not receive a control signal. It is equivalent to a controlled switch and is uniformly managed by the control terminal, thereby realizing the on / off control of the power supply circuit of solenoid valve 5. The core function of contactor 2 is to isolate strong and weak currents and to electrically isolate the control circuit from the drive circuit: the weak current control signal of control terminal 1 is connected to the base terminal of contactor 2, which energizes the coil of contactor 2 and realizes the closing and opening of the drive power supply circuit. Even without contactor 2, the system can realize basic logic control. Adding contactor 2 can physically isolate the front-end weak current control circuit from the strong current drive circuit used by the back-end solenoid valve 5 and pneumatic valve, improving the electrical safety and anti-interference capability of the system.

[0036] Control terminal 1 provides operating power to pressure monitor 6; contactor 2 is connected to the 24V power grid, providing drive power for the solenoid valve 5 and the pneumatic valve's associated air circuit control; solenoid valve 5 is controlled by the on / off state of this drive power, thereby switching the on / off state of control air to achieve the opening and closing of the first pneumatic valve 3 and the second pneumatic valve 4. Control terminal 1 outputs a 24V positive command control signal through its built-in DO module. This positive signal is connected to the base terminal of contactor 2 and forms a complete circuit with the 24V negative terminal; after the base terminal circuit is turned on, the coil of contactor 2 is attracted, causing the coil terminal to change from normally open to closed and conductive; the coil terminal achieves controllable switching of the external drive power supply circuit based on the on / off state of the base terminal. Contactor 2, pressure monitor 6, and solenoid valve 5 together constitute a dedicated power supply circuit for solenoid valve 5. This power supply circuit is equipped with dual conduction interlock conditions: the power supply circuit for solenoid valve 5 can only be fully connected when contactor 2 is reliably conducting and the passage between contactor 2 and pressure monitor 6 is normal; disconnection at any point will immediately cut off the power supply circuit. Control terminal 1 sends a 24V positive command control signal, which supplies power to solenoid valve 5 through the interlocking passage of contactor 2. After being energized, solenoid valve 5 switches the pneumatic circuit operating state, thereby achieving a mutually exclusive operating state where the first pneumatic valve 3 is open and the second pneumatic valve 4 is closed.

[0037] As shown in Figure 4, the control terminal 1, pressure monitor 6, solenoid valve 5, first pneumatic valve 3, and second pneumatic valve 4 are all connected to the valve control connection device 8 to achieve signal communication; the control terminal 1 supplies power to the pressure monitor 6, the pressure monitor 6 supplies power to the pressure sensor 7 and collects real-time pressure data, and then transmits it back to the control terminal 1.

[0038] The pressure monitor 6 is configured to perform the following operations: Normal pressure data: When the pressure monitor 6 determines that the acquired pressure data is normal, it controls the connection of the power supply circuit of the solenoid valve 5; Abnormal pressure data: When the pressure monitor 6 determines that the acquired pressure data is abnormal, it immediately cuts off the power supply circuit of the solenoid valve 5; When the control terminal 1 detects that the actual opening and closing position feedback signal of the first pneumatic valve 3 or the second pneumatic valve 4 does not match the control command signal issued by the control terminal 1, the system immediately triggers an alarm and executes corresponding safety control operations.

[0039] The control system uses the energized / de-energized state of solenoid valve 5 as the core control node, combined with the on / off state of contactor 2 and the pressure determination result of pressure monitor 6, to achieve mutually exclusive linkage control between the first pneumatic valve 3 and the second pneumatic valve 4, specifically divided into two operating conditions:

[0040] First operating condition (first pneumatic valve open + second pneumatic valve closed): Solenoid valve 5 can only be powered and in an energized state when both of the necessary conditions are met simultaneously: "contactor 2 is on" and "pressure monitor 6 determines that the pipeline pressure is normal and keeps the power supply circuit of solenoid valve 5 connected." After being energized, solenoid valve 5 triggers the pneumatic circuit switching action, which drives the valve shaft of the first pneumatic valve 3 to rotate counterclockwise to open it, and at the same time drives the valve shaft of the second pneumatic valve 4 to rotate clockwise to close it, thus completing the mutual exclusion linkage of the two valves.

[0041] Second operating condition (first pneumatic valve closed + second pneumatic valve open): When any of the following conditions are met, the power supply circuit of solenoid valve 5 is cut off, and solenoid valve 5 is de-energized and reset: ① Contactor 2 does not receive a control signal from control terminal 1 and is in the open state; ② After pressure monitor 6 collects real-time pressure data from pressure sensor 7, it determines that the pipeline pressure is abnormal and actively cuts off the power supply circuit of solenoid valve 5. After solenoid valve 5 is de-energized, the air circuit returns to its initial state, the two pneumatic valve drive heads release air synchronously, the internal springs return to their original position and extend, thereby driving the valve shaft of the first pneumatic valve 3 to rotate clockwise to close, and simultaneously driving the valve shaft of the second pneumatic valve 4 to rotate counterclockwise to open, ensuring that the dual-valve linkage state is mutually exclusive with the first operating condition.

[0042] This control logic, through dual control of "contactor on / off control + pressure abnormality interlocking cut-off", ensures precise matching between the opening and closing status of the dual pneumatic valves and control commands and pipeline conditions, thereby improving the safety and reliability of system operation.

[0043] In one embodiment, as shown in Figure 4, the control terminal 1, pressure monitor 6, solenoid valve 5, first pneumatic valve 3, and second pneumatic valve 4 are all connected to the valve control connection device 8 to achieve signal communication. The control terminal 1 is equipped with a dedicated interface for precise signal interaction.

[0044] First control interface: Control terminal 1 connects to pressure monitor 6 through this interface, providing stable power to pressure monitor 6 on the one hand, and acquiring pipeline pressure data collected by pressure sensor 7 transmitted by pressure monitor 6 in real time on the other hand, forming a pressure signal transmission link: pressure sensor 7 → pressure monitor 6 → control terminal 1 first control interface.

[0045] Second control interface: Control terminal 1 connects to valve control connection device 8 through this interface, which is specifically used to obtain the opening and closing position feedback signals of the first pneumatic valve 3 and the second pneumatic valve 4, clarify the actual working status of the two valves, and provide a basis for the matching and verification of valve position and control signal.

[0046] After the control terminal 1 obtains the actual opening and closing position feedback signal of the first pneumatic valve 3 or the second pneumatic valve 4 through the second control interface, if it determines that the signal does not match the control command signal, the system immediately triggers an alarm and performs corresponding safety control operations.

[0047] In one embodiment, the pressure monitor 6 includes: a control connection port connected to a first control interface for receiving power and sending pressure data to a control terminal 1; a sensor connection port connected to a pressure sensor 7 for supplying power to the pressure sensor 7 and acquiring detected pressure data from the pressure sensor 7; a contactor connection port connected to a contactor 2 for receiving the linkage control signal output by the contactor 2; and a valve control connection port connected to a valve control connection device 8 for outputting a circuit on / off control signal to the valve control connection device 8.

[0048] The pressure monitor 6 has a built-in pressure logic judgment mechanism: when the pressure monitor 6 determines that the acquired pipeline pressure data is within the normal operating range, it controls the contactor connection port and the valve control connection port to maintain a continuous connection; when the pressure monitor 6 determines that the acquired pipeline pressure data exceeds the normal operating range and an abnormal pressure occurs, it immediately controls the contactor connection port and the valve control connection port to disconnect, thereby achieving interlocking cutoff of the power supply circuit.

[0049] In one specific embodiment, such as Figure 5 The pressure monitor 6 has ports 1 to 9, each with a clearly defined function:

[0050] Ports 1, 2, and 3: These serve as control connection ports, connecting to the first control interface of control terminal 1. They are used to receive power from control terminal 1 and transmit pressure data to control terminal 1.

[0051] Ports 6 and 7: These serve as sensor connection ports, connecting to pressure sensor 7, powering pressure sensor 7, and collecting the pipeline pressure data it detects.

[0052] Ports 4 and 5: These are used as contactor connection ports to connect to contactor 2 and receive the linkage control signal output by contactor 2, serving as one of the pre-signal conditions for the power supply circuit to be turned on.

[0053] Ports 8 and 9: These serve as valve control connection ports, connecting to valve control connection device 8. They are used to output circuit on / off control signals to valve control connection device 8, directly affecting the on / off state of the power supply circuit of solenoid valve 5.

[0054] The on / off state of the power supply circuit of solenoid valve 5 is directly determined by the on / off state between ports 4 and 5 and ports 8 and 9 of pressure monitor 6, and this on / off state is precisely controlled by the pressure data judgment result of pressure monitor 6. The specific logic is as follows:

[0055] Normal pressure operation: When the pressure monitor 6 judges the acquired pipeline pressure data and confirms that it is within the preset normal range, it automatically controls the internal switching element to keep the passage between ports 4 and 5 and ports 8 and 9 open. At this time, if the contactor 2 is already in the conducting state, the passage between the contactor 2 and the pressure monitor 6, and between the pressure monitor 6 and the solenoid valve 5 are simultaneously open, and the power supply circuit of the solenoid valve 5 forms a complete conductive link to achieve normal power supply.

[0056] Pressure Abnormal Condition: When the pressure monitor 6 determines that the pipeline pressure data exceeds the preset normal range (i.e., pressure abnormal), it immediately triggers the internal switching element to cut off the passage between ports 4 and 5 and ports 8 and 9; the power supply circuit of solenoid valve 5 is also disconnected due to the critical link being disconnected, realizing the interlocking cutoff of the power supply circuit to ensure system safety.

[0057] In one embodiment, the valve control connection device 8 includes: a pressure monitor access port, which connects to the valve control connection port and the solenoid valve; a control access port, which connects to the second control interface of the control terminal 1, the first pneumatic valve 3 and the second pneumatic valve 4, and is used to feed back the opening and closing position feedback signals of the first pneumatic valve 3 and the second pneumatic valve 4 to the second control interface; and a solenoid valve access port, which connects to the solenoid valve 5 and outputs control signals to the solenoid valve 5.

[0058] The working logic of the valve control connection device 8 is deeply linked with the pressure judgment result of the pressure monitor 6 and the on / off state of the contactor 2 to achieve precise control of the power supply circuit of the solenoid valve 5, as detailed below:

[0059] Normal operating condition: When the pressure monitor 6 determines that the pipeline pressure data is within the preset normal range, its contactor connection port and valve control connection port remain connected; at this time, if the contactor 2 is in the conducting state and outputs a linkage control signal, this signal is transmitted through the pressure monitor 6 to the pressure monitor input port of the valve control connection device 8, the power supply circuit of the solenoid valve 5 forms a complete circuit, the solenoid valve 5 is energized and drives the dual pneumatic valves to perform corresponding opening and closing actions (the first pneumatic valve opens and the second pneumatic valve closes);

[0060] Abnormal protection state: When the pressure monitor 6 determines that the pipeline pressure data exceeds the normal range (pressure abnormality), its contactor connection port and valve control connection port are immediately disconnected. The valve control connection device 8 does not receive a valid control signal, the power supply circuit of the solenoid valve 5 is disconnected, the solenoid valve 5 is de-energized and drives the dual pneumatic valves to return to the safe state (the first pneumatic valve is closed and the second pneumatic valve is open).

[0061] Valve position mismatch response: Control terminal 1 obtains the dual valve opening and closing position feedback signal transmitted by valve control connection device 8 in real time through the second control interface, and compares it with the control command signal issued by itself in real time; if it is determined that the two do not match (i.e. valve position mismatch is abnormal), the system immediately triggers an alarm, records the abnormal information synchronously, and automatically executes preset safety control operations to prevent the fault from escalating.

[0062] In one specific embodiment, such as Figure 5 The valve control connection device 8 has ports 1 to 10, and the port functions are precisely matched with the docking objects:

[0063] Ports 1 and 2 (pressure monitor access ports): corresponding to ports 8 and 9 of the pressure monitor 6 and solenoid valve 5, receive interlock control signals from the pressure monitor 6 and output control signals to the solenoid valve 5;

[0064] Ports 3-10 (control access ports): bidirectional interface to the second control interface of control terminal 1, first pneumatic valve 3, and second pneumatic valve 4. The core function is to transmit the opening and closing position feedback signals of the two pneumatic valves, providing a path for valve position verification.

[0065] After the pressure monitor 6 acquires normal pressure data, it issues a conduction command to control its ports 4 and 5 to connect with ports 8 and 9. At the same time, the valve control connection device 8 outputs control signals at ports 1 and 2, solenoid valve 5 is energized, driving the first pneumatic valve 3 to open and the second pneumatic valve 4 to close.

[0066] When the control terminal detects abnormal pressure data through the first control interface, it sends a cut-off command to the pressure monitor 6, controlling its ports 4 and 5 to disconnect from ports 8 and 9. The valve control connection device 8 stops outputting control signals at ports 1 and 2, solenoid valve 5 is de-energized, driving the first pneumatic valve 3 to close and the second pneumatic valve 4 to open (protection mode).

[0067] Control terminal 1 receives the actual position feedback signal of the dual pneumatic valves transmitted by valve control connection device 8 (ports 3~10) through the second control interface, and performs matching and verification with the control signal it sends out. If the feedback signal does not match the control signal (e.g., the instruction is "first pneumatic valve open" but the feedback is "closed", or the instruction is "second pneumatic valve closed" but the feedback is "open"), the system immediately triggers an alarm (e.g., audible and visual alarm, signal upload) and performs corresponding safety operations.

[0068] In one embodiment, such as Figure 6 The second control interface of control terminal 1 is a single integrated interface, subdivided into two functional branches, which precisely connect to ports 3-12 of valve control connection device 8 to achieve accurate acquisition of valve position feedback signals.

[0069] The second control interface of the control terminal is equipped with two sets of control and feedback channels, corresponding to the two working conditions of "valve 1 open / valve 2 closed" and "valve 1 closed / valve 2 open". It outputs power through the + terminal and receives switch feedback signals through the S terminal. Terminals 3, 10, 5 and 8 are directly connected to the corresponding ports of the valve control connection device, thus constructing a two-way link for command issuance and status feedback.

[0070] Ports 3-10 of the valve control connection device enable signal branching and switching: terminals 3 and 5 are the positive power supply terminals, supplying power to the opening / closing action circuits of the dual valves respectively; terminals 4 and 6 correspond to the opening and closing feedback signals of the first pneumatic valve 3, and terminals 8 and 9 correspond to the opening and closing feedback signals of the second pneumatic valve 4, ultimately converging to the S terminal of the control terminal. The 0 terminal of the first pneumatic valve 3 and the C terminal of the second pneumatic valve 4 are for valve opening position feedback, and the C terminal is for valve closing position feedback. After the valves are in position, the corresponding switching signal is triggered and transmitted back to the control terminal after switching. The opening position feedback terminal of the first pneumatic valve is connected to the closing position feedback terminal of the second pneumatic valve 4 via port 4 to port 9; the closing position feedback terminal of the first pneumatic valve is connected to the opening position feedback terminal of the second pneumatic valve 4 via port 6 to port 7.

[0071] Valve 1 Open / Valve 2 Close: Connects to ports 3 and 8 of the valve control connection device 8; when the first pneumatic valve 3 is open, port 3 is connected and an open position signal is fed back; when the second pneumatic valve 4 is closed, port 8 is connected and a closed position signal is fed back.

[0072] Valve 1 Closed / Valve 2 Open: Connects to ports 10 and 5 of the valve control connection device 8; when the first pneumatic valve 3 is closed, port 10 is open, providing a feedback closed position signal; when the second pneumatic valve 4 is open, port 5 is open, providing a feedback open position signal.

[0073] When control terminal 1 sends a command signal to open the first pneumatic valve 3 and close the second pneumatic valve 4, the preset normal feedback logic is as follows: the second control interface detects that the first pneumatic valve open position feedback is connected (port 3 is on) and the closed position feedback is disconnected (port 10 is disconnected); or, the second pneumatic valve closed position feedback is connected (port 5 is on) and the open position feedback is disconnected (port 8 is disconnected). If the above conditions are not met, the control terminal will immediately trigger an alarm and perform corresponding safety procedures.

[0074] When control terminal 1 sends a command signal to close the first pneumatic valve 3 and open the second pneumatic valve 4, the preset normal feedback logic is as follows: the second control interface detects that the first pneumatic valve is closed (port 10 is on) and open (port 3 is off); or, the second pneumatic valve is open (port 8 is on) and closed (port 5 is off). If the above conditions are not met, the control terminal will immediately trigger an alarm and perform corresponding safety procedures.

[0075] In one embodiment, such as Figure 7 Control terminal 1 has two independent second control interfaces, each dedicated to collecting the opening and closing position feedback signals of two pneumatic valves. These interfaces are precisely connected to ports 5-10 of valve control connection device 8, with independent and clear links.

[0076] Second control interface 1: Only acquires the open / close position feedback signal of the first pneumatic valve 3; docks with ports 3~6 of the valve control connection device 8; ports 3 and 6 are connected → feedback of the open position signal of the first pneumatic valve 3; ports 4 and 5 are connected → feedback of the closed position signal of the first pneumatic valve 3.

[0077] Second control interface 2: Only acquires the open / close position feedback signal of the second pneumatic valve 4; docks with ports 7~10 of valve control connection device 8; ports 7 and 10 are connected → feedback of the open position signal of the second pneumatic valve 4; ports 8 and 9 are connected → feedback of the closed position signal of the second pneumatic valve 4.

[0078] In one embodiment, an alarm is immediately triggered when it is determined that the actual valve position does not match the control command signal;

[0079] Standard alarm handling procedure: After a valve position mismatch alarm is triggered, it is automatically loaded into the system alarm list for permanent display. The operator acknowledges the alarm by responding; if the on-site conditions and valve position status have returned to normal after the response, the alarm is removed from the alarm list and moved to the alarm history archive. If the alarm fault persists, it remains in the alarm list until the fault is completely eliminated before being moved to the history archive. During a reset operation, the system automatically checks whether the alarm fault has been eliminated. If the fault has been eliminated, the alarm is directly removed from the alarm list and moved to the history archive; if the fault still exists, the alarm remains in the alarm list. Alarm silencing: Silencing only disables the audible and visual alarm prompts of the buzzer; it does not eliminate the alarm fault, does not change the system control status, and only eliminates the on-site noise warning.

[0080] It will then perform corresponding operations based on the preset security mechanisms. The three security mechanisms are as follows:

[0081] Override control mechanism: After a valve position mismatch alarm is triggered, the system does not cut off the command signal output of the control terminal, maintaining the current power supply state of solenoid valve 5 and the current open / closed state of the first pneumatic valve 3 and the second pneumatic valve 4. The system program defaults to executing a delayed shutdown logic after a valve position feedback and command mismatch alarm is triggered; however, the override control mechanism allows manual intervention to cancel the subsequent delayed shutdown action. An override control selection pop-up window can be displayed through the human-machine interface; for simpler models, a dedicated override control knob is provided in the control box. After an alarm is triggered, the operator manually activates the override control, and the system will no longer execute the delayed shutdown, avoiding unnecessary forced shutdowns and valve position switching due to false alarms, instantaneous signal disturbances, or minor anomalies that do not affect equipment operation, thus ensuring continuous and stable production operation.

[0082] Direct cut-off mechanism: Once the valve position mismatch alarm is triggered, the control terminal 5 immediately cuts off the control command signal output to the outside and directly disconnects the power supply circuit of the solenoid valve 5, causing the solenoid valve 5 to lose power; according to the initial pneumatic circuit logic of the system, after the solenoid valve loses power, the first pneumatic valve 3 automatically closes and the second pneumatic valve 4 automatically opens, quickly resetting the valve positions of the two valves to the safe initial working condition, realizing immediate safety interlock protection for faults.

[0083] Delay cut-off mechanism: At the moment the alarm is triggered, the system starts a customizable delay timer (such as 3s, 5s, etc.). During the delay period, the current DO command output, the power supply status of solenoid valve 5, and the opening and closing status of the dual valves remain unchanged. After the delay timer ends, if the valve position feedback signal still does not match the control command, the control terminal 1 immediately cuts off the command output, solenoid valve 5 is de-energized, and the dual valves are reset to the safe state of first pneumatic valve 3 closed and second pneumatic valve 4 open. If the valve position feedback recovers and matches the command within the delay period, the delay timer is immediately terminated, and the alarm is still retained in the alarm list. It can only be removed from the alarm list and transferred to the alarm history archive after manual confirmation by the operator.

[0084] This invention, by collecting feedback signals from the opening and closing positions of dual pneumatic valves, can directly verify whether the valves are actually in position as instructed, avoiding false judgments caused by inferring valve positions indirectly based solely on power supply status. It can also quickly identify faults in the feedback path itself, enabling signal link health monitoring and fault location. Furthermore, it provides a precise basis for judgment in multiple safety handling modes such as over-control, delayed cut-off, and direct cut-off. Without blindly shutting down the system, it avoids accidental triggering of protection actions due to momentary signal interference, and ensures the system can be promptly reset to a safe initial state when valve position status cannot be confirmed. Therefore, in marine and land-based dual-valve mutually exclusive linkage operations, it effectively avoids safety risks such as fluid mistransportation and media mixing caused by reverse opening and closing failures.

[0085] In one embodiment, the valve control connection device 8 is a junction box. Specifically, the valve control connection device 8 is a dedicated junction box, which integrates electrical connection terminals and signal busbars for ports 1-10, enabling centralized access and distribution of signals from various components. As a standardized adapter module, the junction box externally only has standard wiring terminals corresponding to the pressure monitor 6, solenoid valve 5, dual pneumatic valve, and control terminal 1, while internally achieving physical connection and electrical isolation between the pressure monitor access port and the control access port. The junction box design of the valve control connection device 8 allows for centralized management of cables for various components, reducing on-site wiring clutter, facilitating troubleshooting and maintenance, and adapting to the installation environment requirements of marine and land-based industrial scenarios.

[0086] Similar in principle to the above embodiments, the present invention provides a control method for synchronous control and joint feedback of dual pneumatic valves. The control method for synchronous control and joint feedback of dual pneumatic valves is applied to the control system for synchronous control and joint feedback of dual pneumatic valves described in the above embodiments; the method includes:

[0087] When the pressure monitor determines that the acquired pressure data is normal, it controls the power supply circuit of the solenoid valve to be connected, and when the contactor is turned on, the solenoid valve is energized, thereby driving the first pneumatic valve to open and the second pneumatic valve to close.

[0088] When the pressure monitor determines that the acquired pressure data is abnormal, it controls to cut off the power supply circuit of the solenoid valve, or the contactor is disconnected, so that the solenoid valve is de-energized, thereby driving the first pneumatic valve to close and the second pneumatic valve to open.

[0089] When the control terminal detects that the acquired feedback signal of the opening or closing position of the first or second pneumatic valve does not match the control signal, it triggers an alarm and performs corresponding operations.

[0090] Since the implementation principle of the dual pneumatic valve synchronous control and joint feedback control method has been described in the previous embodiments, it will not be repeated here.

[0091] The dual pneumatic valve synchronous control and joint feedback control system provided in this embodiment of the invention can be implemented on the terminal side or the server side. For the hardware structure of the electronic terminal, please refer to [link to relevant documentation]. Figure 8 This is a schematic diagram of an optional hardware structure of an electronic terminal 1000 provided in an embodiment of the present invention. The terminal 1000 can be a mobile phone, computer device, tablet device, personal digital processing device, factory back-end processing device, etc. The terminal 1000 includes: at least one processor 1001, a memory 1002, at least one network interface 10010, and a user interface 1009. The various components in the device are coupled together through a bus system 1005. It is understood that the bus system 1005 is used to realize the connection and communication between these components. In addition to a data bus, the bus system 1005 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 8 All buses are labeled as bus systems.

[0092] The user interface 1009 may include a monitor, keyboard, mouse, trackball, clicker, button, touchpad, or touch screen.

[0093] It is understood that memory 1002 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be read-only memory (ROM) or programmable read-only memory (PROM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM) and synchronous static random access memory (SSRAM). The memories described in the embodiments of this invention are intended to include, but are not limited to, these and any other suitable categories of memory.

[0094] In this embodiment of the invention, the memory 1002 is used to store various types of data to support the operation of the terminal 1000. Examples of this data include: any executable program for operation on the terminal 1000, such as the operating system 10021 and application program 10022; the operating system 10021 contains various system programs, such as the framework layer, core library layer, driver layer, etc., for implementing various basic services and handling hardware-based tasks. The application program 10022 may contain various applications, such as a media player, browser, etc., for implementing various application services. The control system for implementing the dual pneumatic valve synchronous control and joint feedback provided in this embodiment of the invention can be included in the application program 10022.

[0095] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by the processor 1001. The processor 1001 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in the processor 1001 or by instructions in the form of software. The processor 1001 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 1001 can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor 1001 may be a microprocessor or any conventional processor, etc. The steps of the accessory optimization method provided in the embodiments of the present invention can be directly reflected as being executed by a hardware decoding processor, or being executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, which is located in a memory. The processor reads the information in the memory and combines it with its hardware to complete the steps of the aforementioned method.

[0096] In an exemplary embodiment, the terminal 1000 may be used to execute the aforementioned method by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), or complex programmable logic devices (CPLDs).

[0097] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented using computer program-related hardware. The aforementioned computer program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0098] In the embodiments provided in this application, the computer-readable and writable storage medium may include read-only memory, random access memory, EEPROM, CD-ROM or other optical disc storage devices, disk storage devices or other magnetic storage devices, flash memory, USB flash drive, portable hard drive, or any other medium capable of storing desired program code in the form of instructions or data structures and accessible by a computer. Additionally, any connection may be appropriately referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. However, it should be understood that computer-readable and writable storage media and data storage media do not include connections, carrier waves, signals, or other transient media, but are intended for non-transient, tangible storage media. The disks and optical discs used in the application include compact optical discs (CDs), laser optical discs, optical discs, digital multifunction optical discs (DVDs), floppy disks, and Blu-ray discs, where disks typically copy data magnetically, while optical discs use lasers to copy data optically.

[0099] In summary, the control system, method, and terminal for synchronous control and joint feedback of dual pneumatic valves of the present invention include a control terminal, a contactor, a first pneumatic valve, a second pneumatic valve, a solenoid valve, a pressure monitor, a pressure sensor, and valve control connection devices. When the pressure monitor determines that the pressure data is normal and the control terminal controls the contactor to be on, the solenoid valve is energized, driving the first pneumatic valve to open and the second pneumatic valve to close. When the pressure data is abnormal or the control terminal controls the contactor to be off, the solenoid valve is de-energized, driving the first pneumatic valve to close and the second pneumatic valve to open. When the control terminal detects a mismatch between the valve position feedback signal and the control signal, an alarm is triggered and corresponding operations are executed. The present invention can achieve synchronous control, synchronous action, synchronous feedback, and fault alarm protection of dual pneumatic valves. It has a reasonable structural layout, clear signal links, and flexible safety handling modes, effectively improving the accuracy, reliability, and adaptability of reverse opening and closing control of dual valve groups for marine and land use. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0100] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A control system for synchronous control and combined feedback of dual pneumatic valves, characterized in that, The system includes: Control terminal, contactor, first pneumatic valve, second pneumatic valve, solenoid valve, pressure monitor, pressure sensor and valve control connection device; The drive heads of the first pneumatic valve and the second pneumatic valve are both connected to the solenoid valve via air passages. The pressure sensor is installed on the pipeline upstream of the first pneumatic valve and the second pneumatic valve, and is used to detect the pressure data of the pipeline before the valve. The contactor is electrically connected to the control terminal and the pressure monitor, respectively, and is used to turn on when a control signal is received from the control terminal and to turn off when no control signal is received; the valve control connection device is connected to the control terminal, the pressure monitor, the solenoid valve, the first pneumatic valve, and the second pneumatic valve; the contactor, the pressure monitor, and the solenoid valve form the power supply circuit of the solenoid valve; The pressure monitor is connected to the pressure sensor and the control terminal, and is used to collect pressure data detected by the pressure sensor and upload it to the control terminal; the pressure monitor is configured to perform the following operations: when it is determined that the acquired pressure data is normal, it controls to connect the power supply circuit of the solenoid valve; when it is determined that the acquired pressure data is abnormal, it controls to disconnect the power supply circuit of the solenoid valve. The control terminal is used to output control signals; it is also used to trigger an alarm and perform corresponding operations when the acquired open / closed position feedback signal of the first pneumatic valve or the second pneumatic valve is detected to be mismatched with the control signal. When the contactor is turned on and the pressure monitor controls the power supply circuit of the solenoid valve to be turned on, the solenoid valve is energized, thereby driving the first pneumatic valve to open and the second pneumatic valve to close. When the contactor is disconnected, or when the pressure monitor controls the disconnection of the power supply circuit of the solenoid valve, the solenoid valve is de-energized, thereby driving the first pneumatic valve to close and the second pneumatic valve to open.

2. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 1, characterized in that, The control terminal is equipped with: The first control interface is connected to the pressure monitor and is used to power the pressure monitor and acquire pressure data. The second control interface is connected to the valve control connection device and is used to obtain the opening and closing position feedback signals of the first pneumatic valve and the second pneumatic valve.

3. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 2, characterized in that, The second control interface uses a single interface to acquire the open / closed position feedback signals of the first pneumatic valve and the second pneumatic valve.

4. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 2, characterized in that, The second control interface uses two interfaces: one interface is used to acquire the open / closed position feedback signal of the first pneumatic valve; the other interface is used to acquire the open / closed position feedback signal of the second pneumatic valve.

5. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 2, characterized in that, The pressure monitor is equipped with: a control connection port, connected to a first control interface, for receiving power and sending pressure data to a control terminal; a sensor connection port, connected to a pressure sensor, for supplying power to the pressure sensor and acquiring detected pressure data from the pressure sensor; and a contactor connection port, connected to a contactor, for receiving control signals. Valve control connection port, connecting to valve control connection device, used to output control signals; When the pressure monitor determines that the pressure data received through the control connection port is normal, the control contactor connection port is connected to the valve control connection port. When the pressure monitor determines that the pressure data received through the control connection port is abnormal, the control contactor connection port is disconnected from the valve control connection port.

6. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 5, characterized in that, The valve control connection device is provided with: a pressure monitor access port, which connects the valve control connection port of the pressure monitor and the solenoid valve; and a control access port, which connects the second control interface of the control terminal, the first pneumatic valve and the second pneumatic valve, and is used to feed back the opening and closing position feedback signals of the first pneumatic valve and the second pneumatic valve to the second control interface.

7. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 6, characterized in that, The valve control connection device uses a junction box.

8. The control system for synchronous control and joint feedback of dual pneumatic valves according to claim 1, characterized in that, When a mismatch is detected between the acquired open / closed position feedback signal of the first or second pneumatic valve and the control signal, an alarm is triggered and a corresponding operation is performed according to a preset safety mechanism; wherein, the safety mechanism includes: The over-control mechanism includes: maintaining the current energized state of the solenoid valve and continuously collecting open / closed position feedback signals; Direct cut-off mechanism: Immediately cut off the control signal output of the control terminal, de-energize the solenoid valve, drive the first pneumatic valve to close and the second pneumatic valve to open; Delay cut-off mechanism: Start a delay timer of preset duration, maintain the current energized state of the solenoid valve during the delay period, and continuously collect the open / close position feedback signal; if the open / close position feedback signal still does not match the control signal after the delay ends, cut off the control signal output of the cut-off control terminal; if it recovers to match the control signal during the delay period, terminate the delay.

9. A control method for synchronous control and combined feedback of dual pneumatic valves, characterized in that, The method, applied to the control system of synchronous control and joint feedback of dual pneumatic valves as described in any one of claims 1 to 8, comprises: When the pressure monitor determines that the acquired pressure data is normal, it controls the power supply circuit of the solenoid valve to be connected, and when the contactor is turned on, the solenoid valve is energized, thereby driving the first pneumatic valve to open and the second pneumatic valve to close. When the pressure monitor determines that the acquired pressure data is abnormal, it controls to cut off the power supply circuit of the solenoid valve, or the contactor is disconnected, so that the solenoid valve is de-energized, thereby driving the first pneumatic valve to close and the second pneumatic valve to open. When the control terminal detects that the acquired feedback signal of the opening or closing position of the first or second pneumatic valve does not match the control signal, it triggers an alarm and performs corresponding operations.

10. An electronic terminal, characterized in that, include: One or more memories and one or more processors; The one or more memories are used to store computer programs; The one or more processors are connected to the memory and are used to run the computer program to perform the method as described in claim 9.

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