Control method and circuit for controlling the shutter closure of a pneumatic nuclear source device

Abstract

This invention discloses a control method and circuit for controlling the closing of a shutter in a pneumatic nuclear source device, comprising: setting an emergency stop control valve in the air intake path of a pneumatic control circuit; wherein an action control valve and a pneumatic actuator are sequentially arranged in the air intake path of the pneumatic control circuit along the air intake direction, and the emergency stop control valve is located between the action control valve and the pneumatic actuator; when the action control valve experiences a pneumatic-related fault, the emergency stop control valve is controlled to perform a depressurization operation on the pneumatic control circuit, thereby driving the pneumatic actuator to close the shutter.

Description

Technical Field

[0001] This application relates to pneumatic nuclear source devices, and more particularly to a control method and circuit for controlling the closing of the shutter of a pneumatic nuclear source device. Background Technology

[0002] With the continuous advancement of nuclear technology applications, its use is becoming increasingly widespread in industry and civilian sectors, in addition to military applications. However, due to the inherent radioactive hazards of nuclear energy, shutters are typically installed to shut down pneumatic nuclear source devices in industrial and civilian processes to prevent the harmful effects of nuclear radiation. If the shutter of a pneumatic nuclear source device fails to close, it can lead to a serious nuclear leak accident.

[0003] Therefore, how to induce the shutter to close when a shutter malfunctions in a pneumatic nuclear source device in order to reduce the risk of nuclear leakage is an urgent problem that needs to be solved. Summary of the Invention

[0004] This invention provides a control method and circuit for controlling the closing of the shutter of a pneumatic nuclear source device, in order to solve or partially solve the technical problem of how to cause the shutter to close when a shutter malfunctions in a pneumatic nuclear source device in order to reduce the risk of nuclear leakage.

[0005] To solve the above-mentioned technical problems, the present invention provides a control method for controlling the closing of the shutter of a pneumatic nuclear source device, comprising:

[0006] An emergency stop control valve is installed in the air intake path of the air circuit control circuit; an action control valve and a pneumatic actuator are sequentially arranged in the air intake path of the air circuit control circuit along the air intake direction, and the emergency stop control valve is located between the action control valve and the pneumatic actuator;

[0007] When the actuation control valve experiences a pneumatic circuit-related fault, it controls the emergency stop control valve to depressurize the pneumatic control circuit, thereby causing the pneumatic actuator to close the shutter.

[0008] Preferably, the method further includes: incorporating a second electrical control circuit into the first electrical control circuit of the action control valve, wherein the emergency stop control valve is provided in the second electrical control circuit;

[0009] When the action control valve experiences a circuit-related fault, it controls the second electrical control circuit to be de-energized, causing the emergency stop control valve to open, thereby depressurizing the pneumatic control circuit and driving the pneumatic actuator to close the shutter.

[0010] Preferably, the method further includes: controlling the first electrical control circuit and the second electrical control circuit to jointly connect to the emergency stop triggering device, so as to control both the first electrical control circuit and the second electrical control circuit to be de-energized.

[0011] Preferably, the method further includes: setting an intermediate relay in the second electrical control circuit so that the electromagnetic coil of the emergency stop control valve and the intermediate relay form a parallel circuit, and the contacts of the intermediate relay are connected to the electromagnetic coil of the actuation control valve.

[0012] The present invention also provides a control loop for controlling the closing of the shutter of a pneumatic nuclear source device, comprising:

[0013] Action control valves and pneumatic actuators are sequentially arranged in the air intake path of the air intake control circuit along the air intake direction;

[0014] An emergency stop control valve is disposed between the motion control valve and the pneumatic actuator;

[0015] When the actuation control valve experiences a pneumatic circuit-related fault, it controls the emergency stop control valve to depressurize the pneumatic control circuit, thereby causing the pneumatic actuator to close the shutter.

[0016] Preferably, the emergency stop control valve is a single-acting normally open electromagnetic reversing mechanism.

[0017] Preferably, the control loop includes:

[0018] The circuit control loop includes a first electrical control loop for the action control valve and a second electrical control loop for the emergency stop control valve; wherein the emergency stop control valve is installed in the second electrical control loop.

[0019] When the action control valve experiences a circuit-related fault, the second electrical control circuit is de-energized, causing the emergency stop control valve to open, thereby depressurizing the pneumatic control circuit and driving the pneumatic actuator to close the shutter.

[0020] Preferably, the first electrical control circuit and the second electrical control circuit are both connected to an emergency stop triggering device to control both the first electrical control circuit and the second electrical control circuit to be de-energized.

[0021] Preferably, in the second electrical control circuit, the solenoid coil of the emergency stop control valve and the intermediate relay form a parallel circuit, and the contacts of the intermediate relay are connected to the solenoid coil of the actuation control valve.

[0022] The present invention also provides a pneumatic nuclear source device, including a control circuit as described above for controlling the shutter closure of the pneumatic nuclear source device.

[0023] Through one or more technical solutions of the present invention, the present invention has the following beneficial effects or advantages:

[0024] This invention provides a control method and circuit for controlling the closing of a pneumatic nuclear source device shutter. An emergency stop control valve is additionally installed in the air intake path of the pneumatic control circuit to provide an additional pressure relief path. When the actuation control valve experiences a pneumatic-related fault, the emergency stop control valve is controlled to perform a pressure relief operation on the pneumatic control circuit, thereby driving the pneumatic actuator to close the shutter. This reduces the risk of nuclear leakage caused by the inability to depressurize the air intake path and thus the inability to close the shutter, ensuring nuclear safety.

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 An improved schematic diagram of the pneumatic control loop according to an embodiment of the present invention is shown;

[0028] Figure 2 An improved schematic diagram of a circuit control loop according to an embodiment of the present invention is shown.

[0029] Explanation of reference numerals in the attached drawings: Action control valve Y1, emergency stop control valve Y2, pneumatic actuator 1, elastic element 2, pneumatic power source device 3, first electrical control circuit L1, second electrical control circuit L2, emergency stop button S1, shutter open button S2, shutter close button S3, shutter open limit button S4, intermediate relay KA, contact KA-1 of intermediate relay KA. Detailed Implementation

[0030] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In practical applications, see Figure 1The pneumatic nuclear source device 3 stores a nuclear source, which needs to be exposed during production to utilize its radiation effect for measurement or other purposes. The pneumatic nuclear source device 3 releases the nuclear source via a shutter. Under normal conditions, the shutter of the pneumatic nuclear source device 3 is closed; it opens to release the nuclear source during use. The shutter is primarily controlled by a pneumatic actuator 1 (e.g., a cylinder, motor, etc.). Specifically, an action control valve Y1 and a pneumatic actuator 1 are installed on the air intake path of the air circuit control loop. The action control valve Y1 controls the gas flow in the air intake path and is a single-acting two-position three-way solenoid directional valve. One side of the pneumatic actuator 1 is connected to the shutter, and the other side has a single-acting elastic element 2. When the shutter needs to be opened, the action control valve Y1 is energized, opening the air circuit control loop. Pressurized gas drives the pneumatic actuator 1 through the action control valve Y1, opening the shutter and simultaneously compressing the elastic element 2, causing it to store energy. When the shutter needs to close, the control valve Y1 is de-energized and connected to the outside atmosphere, thereby depressurizing the air intake side of the pneumatic actuator 1. The pneumatic actuator 1 extends under the elastic potential energy of the elastic element 2, thus closing the shutter. However, during the shutter closing process, the control valve Y1 may experience pneumatic-related malfunctions. For example, if a foreign object enters the control valve Y1 and jams the valve core, preventing depressurization on the air intake side of the pneumatic actuator 1, the pneumatic actuator 1 cannot close the shutter through the elastic element 2, resulting in a shutter closing failure and potentially a serious nuclear leak accident.

[0032] Therefore, this application discloses a control method for controlling the shutter closure of a pneumatic nuclear source device, which provides an additional emergency stop control valve Y2 in the air intake path of the air path control circuit to provide an additional pressure relief path.

[0033] In this embodiment, see Figure 1 In the air intake path of the pneumatic control circuit, an action control valve Y1 and a pneumatic actuator 1 are sequentially arranged along the air intake direction. The emergency stop control valve Y2, as described in this application, is located between the action control valve Y1 and the pneumatic actuator 1 to serve as an additional pressure relief path. In this embodiment, the emergency stop control valve Y2 is a single-acting normally open electromagnetic reversing mechanism, for example... Figure 1 The single-acting, two-position normally open solenoid directional valve shown is equipped with a silencer and is closed when energized and open when de-energized.

[0034] Therefore, when the actuation control valve Y1 experiences a gas-related fault, the emergency stop control valve Y2 is controlled to depressurize the gas control circuit, thereby enabling the pneumatic actuator 1 to close the shutter. During the depressurization process, the emergency stop control valve Y2 is opened to connect an additional depressurization path for further depressurization. It is evident that this solution, when faced with the risk of nuclear leakage due to the inability to depressurize the air intake and close the shutter, can quickly depressurize and close the shutter, thus reducing the risk of nuclear leakage and ensuring nuclear safety.

[0035] On the other hand, during the shutter closing process, in addition to air circuit-related faults, the action control valve Y1 may also cause circuit-related faults, such as contact sticking or abnormal grounding of the power supply (line, etc.), which may cause the first circuit control loop L1 where the action control valve Y1 is located to fail to disconnect the power. Since the action control valve Y1 needs to be disconnected to perform the pressure relief operation, if the action control valve Y1 fails to disconnect the power, the air intake side of the pneumatic actuator 1 will not be able to depressurize, which will lead to the shutter closing fault and cause a serious nuclear leak accident.

[0036] Therefore, based on the above embodiments, this application designs a second electrical control circuit L2 for the emergency stop control valve Y2, see [link to relevant documentation]. Figure 2 A second electrical control circuit L2 is connected in parallel to the first electrical control circuit L1 of the action control valve Y1. An emergency stop control valve Y2 is installed in the second electrical control circuit L2. When the action control valve Y1 experiences a circuit-related fault, the second electrical control circuit L2 is de-energized, causing the emergency stop control valve Y2 to open, thereby depressurizing the pneumatic control circuit and driving the pneumatic actuator 1 to close the shutter.

[0037] In this embodiment, the emergency stop control valve Y2 has a power-off opening function. By de-energizing the second electrical control circuit L2, the emergency stop control valve Y2 is brought to the open state to perform pressure relief operation. At this time, whether or not the first electrical control circuit L1 is de-energized will not affect the pressure relief operation of the emergency stop control valve Y2. Therefore, it can solve the nuclear leakage problem faced by the action control valve Y1 when a circuit-related fault occurs, and can quickly depressurize and quickly close the shutter, thereby reducing the risk of nuclear leakage and ensuring nuclear safety.

[0038] To further control the aforementioned two control loops, in this method, the first electrical control loop L1 and the second electrical control loop L2 are both connected to an emergency stop triggering device (e.g., Figure 2The emergency stop button S1 is used to de-energize both the first electrical control circuit L1 and the second electrical control circuit L2. In practice, if the first electrical control circuit L1 cannot be de-energized, simply triggering the emergency stop triggering device (e.g., pressing the emergency stop button S1) will de-energize both control circuits. However, in reality, even pressing the emergency stop button S1 may not de-energize the first electrical control circuit L1. Therefore, a structure using the same emergency stop triggering device to control both electrical control circuits simultaneously is adopted. When the first electrical control circuit L1 cannot be de-energized, de-energizing the second electrical control circuit L2 opens the emergency stop control valve Y2 to perform a pressure relief operation, thereby compensating for the failure caused by the first electrical control circuit L1 not being de-energized. This provides a more reliable guarantee for the rapid closing of the shutter in terms of electrical control circuits.

[0039] As can be seen, the above design not only adds power-off control to the first electrical control circuit L1, but also considers the situation where the first electrical control circuit L1 cannot be powered off. By de-energizing the second electrical control circuit L2, the emergency stop control valve Y2 is brought to the open state to perform pressure relief operation, thereby achieving the purpose of redundant power-off and compensating for the fault caused by the inability to de-energize the first electrical control circuit L1. In addition, since the same emergency stop triggering device controls two control circuits, control costs can also be saved.

[0040] As an optional implementation, an intermediate relay KA is provided in the second electrical control circuit L2 so that the solenoid coil of the emergency stop control valve Y2 and the intermediate relay KA form a parallel circuit. Furthermore, this parallel circuit is simultaneously connected to an emergency stop triggering device, so that the emergency stop triggering device simultaneously controls the emergency stop control valve Y2 and the intermediate relay KA, thereby enabling monitoring of the solenoid coil status of the emergency stop control valve Y2. In the first electrical control circuit L1, the shutter release button S2 and the shutter release limit button S4 are simultaneously connected to the emergency stop triggering device.

[0041] To achieve interlocking control with the actuation control valve Y1, the contact KA-1 of the intermediate relay KA is connected to the solenoid coil of the actuation control valve Y1. In this design, if the second electrical control circuit L2 is de-energized, it will trigger the contact KA-1 of the intermediate relay KA to open, thereby de-energizing the first electrical control circuit L1, achieving the interlocking de-energizing function of the two electrical control circuits. Furthermore, since the contact KA-1 of the intermediate relay KA directly acts on the solenoid coil of the actuation control valve Y1, even if the aforementioned button contacts are stuck together, it will not affect the de-energizing of the actuation control valve Y1; as long as the contact KA-1 of the intermediate relay KA opens, the actuation control valve Y1 will be in a de-energized state.

[0042] Furthermore, the emergency stop control valve Y2 is used to close the shutter when a malfunction occurs; it is not needed during normal shutter operation. Therefore, to ensure normal shutter operation, the contact KA-1 of the intermediate relay KA is connected to the solenoid coil of the action control valve Y1 for interlocking control. In this design, the emergency stop control valve Y2 has an energized-close function. When the second electrical control circuit L2 is energized, the emergency stop control valve Y2 is closed and no pressure relief operation occurs, and the contact KA-1 of the intermediate relay KA is energized and closed. When the second electrical control circuit L2 is energized, it controls the shutter opening and closing via the action control valve Y1. Only when the action control valve Y1 experiences a pneumatic or electrical fault will it de-energize the emergency stop control valve Y2 to quickly close the shutter.

[0043] As can be seen, in the above implementation scheme, the interlocking control of the emergency stop control valve Y2, the intermediate relay KA, and the action control valve Y1 can ensure the normal opening and closing of the shutter when power is applied, and can also ensure the emergency and rapid closing of the shutter when it has a closing failure.

[0044] Based on the same inventive concept as the foregoing embodiments, the following embodiments disclose a control loop for controlling the closing of the shutter of a pneumatic nuclear source device. This control loop is improved in terms of both the pneumatic control loop and the electrical control loop, so as to quickly close the shutter in the event of a shutter malfunction. See also Figure 1 This is an improved schematic diagram of the pneumatic control circuit. In the air intake path of the pneumatic control circuit, an actuation control valve Y1 and a pneumatic actuator 1 are sequentially arranged along the air intake direction. In addition, an emergency stop control valve Y2 is also provided in the pneumatic control circuit, located between the actuation control valve Y1 and the pneumatic actuator 1, as an additional pressure relief path. In this embodiment, the actuation control valve Y1 is a single-acting two-position three-way solenoid valve. When energized, it connects the pneumatic control circuit, thereby opening the shutter of the pneumatic actuator 1; when de-energized, it connects to the outside atmosphere, depressurizing the air intake side of the pneumatic actuator 1, thereby closing the shutter. The emergency stop control valve Y2 is a single-acting normally open solenoid valve, for example... Figure 1 The single-acting, two-position normally open solenoid directional valve shown is equipped with a silencer and is closed when energized and open when de-energized.

[0045] Based on the emergency stop control valve Y2 in the gas circuit control loop, when the actuation control valve Y1 experiences a gas circuit-related fault, the emergency stop control valve Y2 is controlled to depressurize the gas circuit control loop, thereby actuating the pneumatic actuator 1 to close the shutter. It is evident that, when faced with the risk of nuclear leakage due to the inability to depressurize the air intake and close the shutter, the aforementioned loop can quickly depressurize and close the shutter, thus reducing the risk of nuclear leakage and ensuring nuclear safety.

[0046] In some alternative implementations, improvements were made to the circuit control loop to address the issue of shutter malfunctions caused by circuit-related faults in the action control valve Y1. See [link / reference] Figure 2 This is an improved schematic diagram of the circuit control loop. The circuit control loop includes the first electrical control loop L1 for the action control valve Y1 and the second electrical control loop L2 for the emergency stop control valve Y2.

[0047] In the first electrical control circuit L1, there is a shutter open button S2, a shutter close button S3, and a shutter open limit switch S4. The shutter open button S2 and shutter close button S3 are connected to the solenoid coil of the action control valve Y1 to control the opening and closing of the valve, thereby realizing the opening and closing of the shutter. The main function of the shutter open limit switch S4 is to keep the action control valve Y1 in the open state after the shutter is fully open, through a limit locking control circuit. If the open limit switch is lost, for safety reasons, the power will be automatically cut off and the shutter will be closed.

[0048] If the actuation control valve Y1 in the first electrical control circuit L1 cannot be de-energized, the pressure relief operation cannot be performed, resulting in a shutter closure failure. To address this issue, this embodiment includes an emergency stop control valve Y2 in the second electrical control circuit L2. When the actuation control valve Y1 experiences a circuit-related fault, the second electrical control circuit L2 is de-energized, causing the emergency stop control valve Y2 to open, thereby de-energizing the pneumatic control circuit and ultimately closing the shutter via the pneumatic actuator 1.

[0049] It is worth noting that since the emergency stop control valve Y2 has a power-off opening function, the emergency stop control valve Y2 is opened to perform pressure relief operation by de-energizing the second electrical control circuit L2. At this time, whether or not the first electrical control circuit L1 is de-energized will not affect the pressure relief operation of the emergency stop control valve Y2. Therefore, it can solve the nuclear leakage problem faced by the action control valve Y1 when a circuit-related fault occurs, and can quickly depressurize and quickly close the shutter, thereby reducing the risk of nuclear leakage and ensuring nuclear safety.

[0050] To further control the aforementioned two control loops, the first electrical control loop L1 and the second electrical control loop L2 are both connected to an emergency stop triggering device, for example... Figure 2The emergency stop button S1 shown is used to de-energize both the first electrical control circuit L1 and the second electrical control circuit L2. Specifically, if the first electrical control circuit L1 cannot be de-energized, simply triggering the emergency stop triggering device (e.g., pressing the emergency stop button S1) will de-energize both control circuits. However, in practice, even pressing the emergency stop button S1 may not de-energize the first electrical control circuit L1. Therefore, a structure that uses the same emergency stop triggering device to control both electrical control circuits simultaneously is adopted. When the first electrical control circuit L1 cannot be de-energized, de-energizing the second electrical control circuit L2 causes the emergency stop control valve Y2 to open and perform a pressure relief operation, thereby compensating for the failure caused by the inability of the first electrical control circuit L1 to be de-energized. This provides a more reliable guarantee for the rapid closing of the shutter in terms of electrical control circuits.

[0051] As can be seen, the above design not only adds power-off control to the first electrical control circuit L1, but also considers the situation where the first electrical control circuit L1 cannot be powered off. By powering off the second electrical control circuit L2, the emergency stop control valve Y2 is brought to the open state to perform pressure relief, thereby compensating for the fault caused by the inability to power off the first electrical control circuit L1. In addition, since the same emergency stop triggering device controls the two control circuits, control costs can also be saved.

[0052] Specifically, in the second electrical control circuit L2, the solenoid coil of the emergency stop control valve Y2 and the intermediate relay KA form a parallel circuit. This parallel circuit is simultaneously connected to the emergency stop triggering device, so that the emergency stop triggering device can simultaneously control the emergency stop control valve Y2 and the intermediate relay KA, thereby enabling monitoring of the state of the solenoid coil of the emergency stop control valve Y2. In the first electrical control circuit L1, the shutter release button S2 and the shutter release limit button S4 are simultaneously connected to the emergency stop triggering device.

[0053] To achieve interlocking control with the actuation control valve Y1, the contact KA-1 of the intermediate relay KA is connected to the solenoid coil of the actuation control valve Y1. In this design, if the second electrical control circuit L2 is de-energized, it will trigger the contact KA-1 of the intermediate relay KA to open, thereby de-energizing the first electrical control circuit L1, achieving the interlocking de-energizing function of the two electrical control circuits. Furthermore, since the contact KA-1 of the intermediate relay KA directly acts on the solenoid coil of the actuation control valve Y1, even if the aforementioned button contacts are stuck together, it will not affect the de-energizing of the actuation control valve Y1; as long as the contact KA-1 of the intermediate relay KA opens, the actuation control valve Y1 will be in a de-energized state.

[0054] Furthermore, the emergency stop control valve Y2 is used to close the shutter when a malfunction occurs; it is not needed during normal shutter operation. Therefore, to ensure normal shutter operation, the contact KA-1 of the intermediate relay KA is connected to the solenoid coil of the action control valve Y1 for interlocking control. In this design, the emergency stop control valve Y2 has an energized-close function. When the second electrical control circuit L2 is energized, the emergency stop control valve Y2 is closed and no pressure relief operation occurs, and the contact KA-1 of the intermediate relay KA is energized and closed. When the second electrical control circuit L2 is energized, it controls the shutter opening and closing via the action control valve Y1. Only when the action control valve Y1 experiences a pneumatic or electrical fault will it de-energize the emergency stop control valve Y2 to quickly close the shutter.

[0055] As can be seen, in the above implementation scheme, the interlocking control of the emergency stop control valve Y2, the intermediate relay KA, and the action control valve Y1 can ensure the normal opening and closing of the shutter when power is applied, and can also ensure the emergency and rapid closing of the shutter when it has a closing failure.

[0056] Based on the same inventive concept as the foregoing embodiments, the following embodiments disclose a pneumatic nuclear source device 3, including a control circuit for controlling the shutter closure of the pneumatic nuclear source device according to any of the foregoing embodiments. It is worth noting that the specific control circuit in this device has been described in detail in the foregoing embodiments, and therefore will not be repeated here.

[0057] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0058] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A control method for controlling the closing of the shutter of a pneumatic nuclear source device, characterized in that, include: An emergency stop control valve is installed in the air intake path of the air circuit control circuit; an action control valve and a pneumatic actuator are sequentially arranged in the air intake path of the air circuit control circuit along the air intake direction, and the emergency stop control valve is located between the action control valve and the pneumatic actuator; When the actuation control valve experiences a pneumatic circuit-related fault, it controls the emergency stop control valve to perform a depressurization operation on the pneumatic circuit control loop, thereby driving the pneumatic actuator to close the shutter. A second electrical control circuit is connected in parallel to the first electrical control circuit of the actuation control valve, and the emergency stop control valve is installed in the second electrical control circuit; When the action control valve experiences a circuit-related fault, it controls the second electrical control circuit to be de-energized, causing the emergency stop control valve to open, thereby depressurizing the pneumatic control circuit and driving the pneumatic actuator to close the shutter. An intermediate relay is provided in the second electrical control circuit so that the solenoid coil of the emergency stop control valve and the intermediate relay form a parallel circuit, and the contacts of the intermediate relay are connected to the solenoid coil of the actuation control valve. The first electrical control circuit and the second electrical control circuit are connected to the emergency stop triggering device to control both the first electrical control circuit and the second electrical control circuit to be de-energized. The first electrical control circuit is connected to one normally closed contact of the emergency stop triggering device, and the second electrical control circuit is connected to another normally closed contact of the emergency stop triggering device.

2. A control circuit for controlling the closing of the shutter of a pneumatic nuclear source device, characterized in that, include: Action control valves and pneumatic actuators are sequentially arranged in the air intake path of the air intake control circuit along the air intake direction; An emergency stop control valve is disposed between the motion control valve and the pneumatic actuator; The first electrical control circuit of the actuation control valve is connected to the second electrical control circuit, and the emergency stop control valve is installed in the second electrical control circuit; An intermediate relay is provided in the second electrical control circuit so that the solenoid coil of the emergency stop control valve and the intermediate relay form a parallel circuit, and the contacts of the intermediate relay are connected to the solenoid coil of the actuation control valve. The first electrical control circuit and the second electrical control circuit are both connected to the emergency stop triggering device to control both the first electrical control circuit and the second electrical control circuit to be de-energized. The first electrical control circuit is connected to one normally closed contact of the emergency stop triggering device, and the second electrical control circuit is connected to another normally closed contact of the emergency stop triggering device. Specifically, when the action control valve experiences a pneumatic circuit-related fault, the emergency stop control valve is controlled to depressurize the pneumatic circuit control loop, thereby causing the pneumatic actuator to close the shutter. When the action control valve experiences a circuit-related fault, the second electrical control loop is de-energized, causing the emergency stop control valve to open, thereby depressurizing the pneumatic circuit control loop, and causing the pneumatic actuator to close the shutter.

3. The control loop as described in claim 2, characterized in that, The emergency stop control valve is a single-acting normally open electromagnetic reversing mechanism.

4. The control loop as described in claim 2, characterized in that, include: The circuit control loop includes a first electrical control loop for the action control valve and a second electrical control loop for the emergency stop control valve; wherein the emergency stop control valve is installed in the second electrical control loop. When the action control valve experiences a circuit-related fault, the second electrical control circuit is de-energized, causing the emergency stop control valve to open, thereby depressurizing the pneumatic control circuit and driving the pneumatic actuator to close the shutter.

5. The control loop as described in claim 4, characterized in that, The first electrical control circuit and the second electrical control circuit are both connected to an emergency stop triggering device to control both the first electrical control circuit and the second electrical control circuit to be de-energized.

6. The control loop as described in claim 4 or 5, characterized in that, In the second electrical control circuit, the solenoid coil of the emergency stop control valve forms a parallel circuit with the intermediate relay, and the contacts of the intermediate relay are connected to the solenoid coil of the actuation control valve.

7. A pneumatic nuclear source device, characterized in that, Includes the control circuit for controlling the closing of the shutter of the pneumatic nuclear source device as described in any one of claims 2-6.

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