Automatic shutdown control device and radioactive source system

Abstract

The invention discloses an automatic shutdown control device and a radioactive source system. The automatic shutdown control device comprises a first actuator (15), a first one-way throttle valve (6), a first pilot-operated type one-way throttle valve (11), a first reversing valve (110), a fluid pressure source (1), a first backflow pipeline, a fluid control valve (10) and a first energy storage device (13). The first pilot-operated type one-way throttle valve (11) comprises a second one-way throttle valve (112) and a first one-way valve (111). When power is cut off, the first reversing valve (110) is switched to the second working position (123), an outlet of the fluid pressure source (1) is connected with a straight-through opening of the second one-way throttling valve (112) through the first reversing valve (110), and a straight-through opening of the first one-way throttling valve (6) is connected with an inlet of the first backflow pipeline through the first reversing valve (110). When the fluid pressure source (1) outputs, the fluid control valve (10) is switched to the closing position (101); when the fluid pressure source (1) is cut off, the fluid control valve (10) is switched to the opening position (102), and the outlet of the first energy storage device (13) is connected with the closing port (B2) of the first actuator (15) through the fluid control valve (10). According to the device, the shutdown action can be automatically completed in a power-off and / or current-off state, manual shutdown is not needed, and risks existing in manual operation are reduced.

Description

Automatic shutdown control devices and radiation source systems Technical Field

[0001] The present disclosure relates to the field of automatic control technology, and in particular to an automatic shutdown control device and a radiation source system. Background Art

[0002] Radiation measurement equipment is equipped with a radioactive source. The radiation emitted by this source is potentially harmful to the human body. The device automatically turns the source on when in operation and off when not in operation. However, in the event of a sudden power outage or gas outage, the radiation measurement equipment cannot automatically shut down the source. Workers must manually shut down the source, which poses a radiation safety risk. Furthermore, if the source's shutdown requires the coordination of multiple actuators, the sequence of these actuators must be controlled.

[0003] Summary of the Invention

[0004] The purpose of the present disclosure is to solve one or more of the technical problems mentioned above. The embodiments of the present disclosure can be implemented as follows:

[0005] In a first aspect, the present disclosure provides an automatic shutdown control device, comprising:

[0006] first actuator;

[0007] a first one-way throttle valve, wherein a throttle port of the first one-way throttle valve is connected to an opening port of the first actuator;

[0008] a first pilot-operated one-way throttle valve, comprising a second one-way throttle valve and a first one-way valve, wherein the inlet of the first one-way valve is connected to the throttle port of the second one-way throttle valve and the through port of the first one-way throttle valve, respectively, and the outlet of the first one-way valve is connected to the closing port of the first actuator;

[0009] a first reversing valve, wherein the through port of the first one-way throttle valve is connected to the first reversing valve, and the through port of the second one-way throttle valve is connected to the first reversing valve;

[0010] a fluid pressure source, wherein an outlet of the fluid pressure source is connected to the first reversing valve;

[0011] a first return line, wherein the inlet of the first return line is connected to the first reversing valve;

[0012] a fluid control valve, wherein the closing port of the first actuator is connected to the fluid control valve, and the control port of the fluid control valve is connected to the outlet of the fluid pressure source;

[0013] a first accumulator, wherein an outlet of the first accumulator is connected to the fluid control valve;

[0014] When powered on, the first reversing valve switches to the first working position, the outlet of the fluid pressure source is connected to the through port of the first one-way throttle valve through the first reversing valve, and the through port of the second one-way throttle valve is connected to the inlet of the first return line through the first reversing valve;

[0015] When the power is off, the first reversing valve switches to the second working position, the outlet of the fluid pressure source is connected to the through port of the second one-way throttle valve through the first reversing valve, and the through port of the first one-way throttle valve is connected to the inlet of the first return line through the first reversing valve;

[0016] When the fluid pressure source is output, the fluid control valve is switched to the closed position;

[0017] When the fluid pressure source is cut off, the fluid control valve is switched to the open position, and the outlet of the first accumulator is connected to the closing port of the first actuator through the fluid control valve.

[0018] In a second aspect, the present disclosure provides an automatic shutdown control device, comprising:

[0019] first actuator;

[0020] a first one-way throttle valve, wherein a throttle port of the first one-way throttle valve is connected to an opening port of the first actuator;

[0021] a first pilot-operated one-way throttle valve, comprising a second one-way throttle valve and a first one-way valve, wherein the inlet of the first one-way valve is connected to the throttle port of the second one-way throttle valve and the through port of the first one-way throttle valve, respectively, and the outlet of the first one-way valve is connected to the closing port of the first actuator;

[0022] a first reversing valve, wherein the through port of the first one-way throttle valve is connected to the first reversing valve, and the through port of the second one-way throttle valve is connected to the first reversing valve;

[0023] a fluid pressure source, wherein an outlet of the fluid pressure source is connected to the first reversing valve;

[0024] a first return line, wherein the inlet of the first return line is connected to the first reversing valve;

[0025] a delay structure connected to the first reversing valve; an outlet of the fluid pressure source is connected to the delay structure;

[0026] When powered on, the first reversing valve switches to the first working position, the outlet of the fluid pressure source is connected to the through port of the first one-way throttle valve through the first reversing valve, and the through port of the second one-way throttle valve is connected to the inlet of the first return line through the first reversing valve;

[0027] When the power is off, the outlet of the fluid pressure source is connected to the delay structure so that the first reversing valve switches to the second working position. The outlet of the fluid pressure source is connected to the straight-through port of the second one-way throttle valve through the first reversing valve, and the straight-through port of the first one-way throttle valve is connected to the inlet of the first return pipe through the first reversing valve.

[0028] In a third aspect, the present disclosure provides a radiation source system, comprising a radiation device and the above-mentioned automatic shutdown control device;

[0029] The radiation device is used to turn on or off the radiation source;

[0030] The first actuator is connected to the radiation device and is used to turn the radiation device on and off.

[0031] The beneficial effects of the present disclosure include, for example:

[0032] The present disclosure provides an automatic shutdown control device. When power is on, a first reversing valve switches to a first working position. The outlet of the fluid pressure source is connected to the through port of the first one-way throttle valve through the first reversing valve, and the through port of the second one-way throttle valve is connected to the inlet of the first return line through the first reversing valve. When power is off, the first reversing valve switches to a second working position. The outlet of the fluid pressure source is connected to the through port of the second one-way throttle valve through the first reversing valve, and the through port of the first one-way throttle valve is connected to the inlet of the first return line through the first reversing valve. When the fluid pressure source is outputting, the fluid control valve switches to a closed position. When the fluid pressure source is cut off, the fluid control valve switches to an open position, and the outlet of the first accumulator is connected to the closed port of the first actuator through the fluid control valve. With this arrangement, in the event of a power outage and / or a flow interruption, the first actuator can automatically close without manual operation, thereby improving the automation level of the equipment, ensuring structural reliability, and reducing the risks associated with manual operation.

[0033] The present disclosure provides a radiation source system comprising a radiation device and the aforementioned automatic shutdown control device. The radiation device is used to turn the radiation source on and off. A first actuator is connected to the radiation device and is used to activate and deactivate the radiation device. In the event of a power outage and / or current interruption, the first actuator can automatically shut down the radiation source, eliminating the need for manual operation. This reliable structure reduces the risk of exposure to radiation from proximity to the radiation source during manual operation, providing enhanced safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0035] FIG1 is a schematic structural diagram of an automatic shutdown control device provided by a first embodiment of the present disclosure in a normally open state under power-on and ventilation conditions;

[0036] FIG2 is a schematic structural diagram of the automatic shutdown control device provided by the first embodiment of the present disclosure when the device is powered on and closed;

[0037] FIG3 is a schematic structural diagram of the automatic shutdown control device provided by the first embodiment of the present disclosure in a state of sudden gas shutoff in the power-on and gas-ventilation state;

[0038] FIG4 is a schematic structural diagram of the automatic shutdown control device provided by the first embodiment of the present disclosure when it is shut down suddenly due to power failure or gas outage in the power-on and gas-ventilation state;

[0039] FIG5 is a schematic structural diagram of the automatic shutdown control device provided by the second embodiment of the present disclosure in a normally opened state under power-on and ventilation conditions;

[0040] FIG6 is a schematic structural diagram of the automatic shutdown control device provided by the second embodiment of the present disclosure when the device is powered on and closed;

[0041] FIG7 is a schematic structural diagram of an automatic shutdown control device according to a second embodiment of the present disclosure in which a sudden gas shutoff occurs in an energized and ventilated state;

[0042] FIG8 is a schematic structural diagram of an automatic shutdown control device according to a second embodiment of the present disclosure that is shut down when power is suddenly cut off or gas is shut down in a power-on and gas-ventilation state;

[0043] FIG9 is a schematic structural diagram of the automatic shutdown control device provided by the third embodiment of the present disclosure in a normally opened state under power-on and ventilation conditions;

[0044] FIG10 is a schematic structural diagram of the automatic shutdown control device provided by the third embodiment of the present disclosure in a power-on and ventilation state;

[0045] FIG11 is a schematic structural diagram of an automatic shutdown control device according to a third embodiment of the present disclosure in a state of sudden gas shutoff in an energized and ventilated state;

[0046] FIG12 is a schematic structural diagram of the automatic shutdown control device provided by the third embodiment of the present disclosure when it is shut down suddenly due to power failure or gas outage in the power-on and gas-ventilation state;

[0047] FIG13 is a schematic structural diagram of an automatic shutdown control device according to a fourth embodiment of the present disclosure, in which a radiation source is turned on in a power-on and ventilation state;

[0048] FIG14 is a schematic structural diagram of the automatic shutdown control device provided in the fourth embodiment of the present disclosure in which a sudden power failure occurs when the device is powered on and ventilated.

[0049] Icons: 1-fluid pressure source; 2-second reversing valve; 21-fifth working position; 22-sixth working position; 3-solenoid valve; 31-third working position; 32-fourth working position; 4-third one-way throttle valve; 5-second pilot one-way throttle valve; 51-third one-way valve; 52-fourth one-way throttle valve; 6-first one-way throttle valve; 7-fifth one-way throttle valve; 8-second one-way valve; 9-fourth one-way valve; 10-fluid control valve; 20-control valve; 101-closed position; 102-open Open position; 110-first reversing valve; 11-first pilot-operated one-way throttle valve; 111-first one-way valve; 112-second one-way throttle valve; 121-sixth one-way throttle valve; 122-first working position; 123-second working position; 125-second accumulator; 13-first accumulator; 14-second actuator; 15-first actuator; 16-first muffler; 17-second muffler; A1-rising port; A2-descending port; B1-opening port; B2-closing port. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure as claimed, but merely represents selected embodiments of the present disclosure. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0053] In the description of the present disclosure, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present disclosure.

[0054] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0055] It should be noted that, in the absence of conflict, the features in the embodiments of the present disclosure may be combined with each other.

[0056] This embodiment provides an automatic shutdown control device that can automatically shut down in the event of power outage, current outage, or power outage and current outage without manual operation. It has a high degree of automation, a reliable structure, and high safety.

[0057] First embodiment

[0058] Referring to Figure 1 , the automatic shutdown control device includes a first actuator 15, a first one-way throttle valve 6, a first pilot-operated one-way throttle valve 11, a first reversing valve 110, a fluid pressure source 1, a first return line, a fluid control valve 10, and a first accumulator 13. The throttle port of the first one-way throttle valve 6 is connected to the open port B1 of the first actuator 15. The first pilot-operated one-way throttle valve 11 includes a second one-way throttle valve 112 and a first one-way valve 111. The inlet of the first one-way valve 111 is connected to the throttle port of the second one-way throttle valve 112 and the through port of the first one-way throttle valve 6, respectively. The outlet of the first one-way valve 111 is connected to the closed port B2 of the first actuator 15. The through port of the first one-way throttle valve 6 is connected to the first reversing valve 110, and the through port of the second one-way throttle valve 112 is connected to the first reversing valve 110. The outlet of the fluid pressure source 1 is connected to the first reversing valve 110. The inlet of the first return line is connected to the first reversing valve 110. The closing port B2 of the first actuator 15 is connected to the fluid control valve 10, and the control port of the fluid control valve 10 is connected to the outlet of the fluid pressure source 1. The outlet of the first accumulator 13 is connected to the fluid control valve 10.

[0059] When powered on, the first reversing valve 110 switches to the first operating position 122. The outlet of the fluid pressure source 1 is connected to the through port of the first one-way throttle valve 6 through the first reversing valve 110, while the through port of the second one-way throttle valve 112 is connected to the inlet of the first return line through the first reversing valve 110. It can be understood that after passing through the first operating position 122 of the first reversing valve 110, the fluid from the fluid pressure source 1 is split into two paths. One portion of the fluid flows through the first one-way throttle valve 6 and reaches the open port B1 of the first actuator 15, causing the first actuator 15 to open. The other portion of the fluid flows to the inlet of the first one-way valve 111, keeping the first one-way valve 111 open. The fluid at the closed port B2 of the first actuator 15 then flows back through the first pilot-operated one-way throttle valve 11, the first reversing valve 110, and the first return line.

[0060] When power is off, the first reversing valve 110 switches to the second operating position 123. The outlet of the fluid pressure source 1 is connected to the through port of the second one-way throttle valve 112 through the first reversing valve 110. The fluid flows through the first pilot-operated one-way throttle valve 11 and enters the closed port B2 of the first actuator 15, causing the first actuator 15 to close. The through port of the first one-way throttle valve 6 is connected to the inlet of the first return line through the first reversing valve 110. The fluid in the open port B1 of the first actuator 15 flows back through the first one-way throttle valve 6, the first reversing valve 110, and the first return line.

[0061] When the fluid pressure source 1 is outputting, the fluid control valve 10 switches to the closed position 101. When the fluid pressure source 1 is cut off, the fluid control valve 10 switches to the open position 102. The outlet of the first accumulator 13 is connected to the closing port B2 of the first actuator 15 through the fluid control valve 10, thereby closing the first actuator 15.

[0062] The fluid provided by the fluid pressure source 1 can be either gas or liquid, without specific limitation. This embodiment uses a gas medium as an example. It is understood that the first actuator 15 can be a drive element such as a cylinder. The first pilot-operated one-way throttle valve 11, when open, provides a steady flow and exhaust, ensuring smoother cylinder operation. The first one-way throttle valve 6, when closed, provides a steady flow and exhaust, ensuring smoother cylinder operation.

[0063] Optionally, the automatic shutdown control device further includes a second one-way valve 8. The inlet of the second one-way valve 8 is connected to the outlet of the fluid pressure source 1, and the outlet of the second one-way valve 8 is connected to the first accumulator 13. The second one-way valve 8 can prevent the fluid in the first accumulator 13 from flowing back into the fluid pressure source 1, thereby facilitating pressure maintenance in the first accumulator 13.

[0064] Optionally, the automatic shutdown control device further includes a solenoid valve 3 connected to the outlet of the fluid pressure source 1. When energized, the solenoid valve 3 switches to a third operating position 31, connecting the outlet of the fluid pressure source 1 to the first accumulator 13 via the solenoid valve 3. Fluid from the fluid pressure source 1 flows into the first accumulator 13, which stores energy for standby use.

[0065] When the power is off, the solenoid valve 3 switches to the fourth working position 32, and the outlet of the fluid pressure source 1 is connected to the first reversing valve 110 through the solenoid valve 3, so that the first reversing valve 110 switches to the second working position 123, and the first actuator 15 performs the closing action.

[0066] Optionally, the automatic shutdown control device further includes a control valve 20. This control valve 20 can be a one-way valve, with its inlet connected to the fluid control valve 10 and its outlet connected to the shutoff port B2 of the first actuator 15. Alternatively, the control valve 20 can be a one-way throttle valve, with its throttle port connected to the fluid control valve 10 and its through port connected to the shutoff port B2 of the first actuator 15. When the fluid pressure source 1 is shut off, the fluid in the first accumulator 13 enters the shutoff port B2 of the first actuator 15 through the fluid control valve 10 and the control valve 20, shutting the first actuator 15 off.

[0067] Optionally, the fluid pressure source 1 includes a gas source triplex, comprising an air filter, a pressure reducing valve, and an oil mist collector. This triplex ensures that the gas at the outlet of the fluid pressure source 1 is purified, filtered, and reduced to a preset pressure, thereby ensuring clean, stable pressure for the working gas in the system. Mufflers are provided on both the first and second return lines to reduce noise generated during operation of the automatic shutdown control device.

[0068] Optionally, the solenoid valve 3 and the second reversing valve 2 are respectively two-position five-way solenoid valves, the first reversing valve 110 is a two-position five-way solenoid valve, and the fluid control valve 10 is a two-position three-way air-controlled valve.

[0069] The automatic shutdown control device provided in this embodiment works as follows under various working conditions:

[0070] 1 , under normal power-on and ventilation conditions, the principle of the first actuator 15 opening is as follows:

[0071] Under normal power-on and ventilation conditions, the solenoid valve 3 is energized and switches to the third working position 31 . The gas of the fluid pressure source 1 flows from branch b through the solenoid valve 3 and the second one-way valve 8 into the first accumulator 13 , and the first accumulator 13 is filled.

[0072] At the same time, first reversing valve 110 is energized and resets to first operating position 122. Gas from fluid pressure source 1 flows from branch d through first reversing valve 110 and first one-way throttle valve 6 into open port B1 of first actuator 15, causing first actuator 15 to open. Gas from closed port B2 of first actuator 15 is discharged through first pilot-operated one-way throttle valve 11, first reversing valve 110, first return line, and first muffler 16.

[0073] 2 , in the normal power-on and ventilation state, the principle of the first actuator 15 being normally closed is as follows:

[0074] When power is removed from the control solenoid valve 3, it switches to the fourth working position 32, entering the closed state. Power is removed from the control first reversing valve 110, causing it to return to the second working position 123. Gas from the fluid pressure source 1 flows from branch d through the first reversing valve 110 and the first pilot-operated one-way throttle valve 11 into the closed port B2 of the first actuator 15, closing the first actuator 15. Gas from the open port B1 of the first actuator 15 is discharged through the first one-way throttle valve 6, the first reversing valve 110, the first return line, and the second muffler 17.

[0075] It should be noted that, when power is suddenly cut off in the normal energized and ventilated state, the closing principle of the first actuator 15 is the same as the principle of normally closing the first actuator 15 in the normal energized and ventilated state, both of which are the working states shown in FIG. 2 .

[0076] 3 , the principle of closing the first actuator 15 when the gas is suddenly cut off under normal power-on and ventilation conditions is as follows:

[0077] In the power-on state, the solenoid valve 3 and the first reversing valve 110 are energized, the solenoid valve 3 is located in the third working position 31 , and the first reversing valve 110 is located in the first working position 122 .

[0078] A sudden gas outage occurs, i.e., there is no gas supply at the outlet of the fluid pressure source 1, and no gas is supplied to branches d, b, and c. Branch c is suddenly disconnected, and there is no pressure at the control port of the fluid control valve 10. The fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 is deflated. The gas in the first accumulator 13 passes through the fluid control valve 10 and then the control valve 20 into the closed port B2 of the first actuator 15, and the first actuator 15 is closed. At this time, the first pilot-operated one-way throttle valve 11 is in a closed state and will not leak. The gas at the open port B1 of the first actuator 15 passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d in sequence, returning to the main gas circuit.

[0079] It can be understood that the main gas circuit here refers to the pipeline connected to the outlet of the fluid pressure source 1, and three branches d, b, and c are provided on the main gas circuit.

[0080] 4 , the principle of closing the first actuator 15 when power and air are suddenly cut off in a normal power and air state is as follows:

[0081] In the sudden power failure state, the solenoid valve 3 and the first reversing valve 110 lose power, the solenoid valve 3 is located in the fourth working position 32 , and the first reversing valve 110 is located in the second working position 123 .

[0082] Branch c suddenly disconnects, depressurizing the control port of fluid control valve 10. Fluid control valve 10 switches from closed position 101 to open position 102. The first accumulator 13 is deflated. The gas in the first accumulator 13 passes through fluid control valve 10 and then through control valve 20 into closed port B2 of the first actuator 15, closing the first actuator 15. At this point, the first pilot-operated one-way throttle valve 11 is closed, preventing leakage. The gas at open port B1 of the first actuator 15 is discharged sequentially through the first one-way throttle valve 6, the first reversing valve 110, the first return line, and the second muffler 17.

[0083] Second embodiment

[0084] Optionally, in conjunction with Figure 5 , based on the first embodiment, the automatic shutdown control device further includes a second actuator 14, a third one-way throttle valve 4, a second pilot-operated one-way throttle valve 5, a second reversing valve 2, and a second return line. The control valve 20 includes a fourth one-way throttle valve 9 and a fifth one-way throttle valve 7. The throttle port of the third one-way throttle valve 4 is connected to the rising port A1 of the second actuator 14. The second pilot-operated one-way throttle valve 5 includes a fourth one-way throttle valve 52 and a third one-way valve 51. The inlet of the third one-way valve 51 is connected to the throttle port of the fourth one-way throttle valve 52 and the through port of the third one-way throttle valve 4, respectively. The outlet of the third one-way valve 51 is connected to the falling port A2 of the second actuator 14. The through port of the third one-way throttle valve 4 is connected to the second reversing valve 2, and the through port of the fourth one-way throttle valve 52 is connected to the second reversing valve 2. The outlet of the fluid pressure source 1 is connected to the second reversing valve 2. The inlet of the second return line is connected to the second reversing valve 2. The inlet of the fourth one-way valve 9 is connected to the fluid control valve 10, and the outlet of the fourth one-way valve 9 is connected to the descending port A2. The throttle port of the fifth one-way throttle valve 7 is connected to the fluid control valve 10, and the through port of the fifth one-way throttle valve 7 is connected to the closing port B2.

[0085] When power is applied, the second reversing valve 2 switches to the fifth working position 21. The outlet of the fluid pressure source 1 is connected to the direct port of the third one-way throttle valve 4 through the second reversing valve 2. The direct port of the fourth one-way throttle valve 52 is connected to the inlet of the second return line through the second reversing valve 2. It can be understood that after passing through the fifth working position 21 of the second reversing valve 2, the fluid from the fluid pressure source 1 is split into two paths. One portion of the fluid flows through the third one-way throttle valve 4 to the rising port A1 of the second actuator 14, causing the second actuator 14 to perform an ascending action. The other portion of the fluid flows to the inlet of the third one-way valve 51, keeping the third one-way valve 51 open. The fluid at the descending port A2 of the second actuator 14 flows back through the second pilot-operated one-way throttle valve 5, the second reversing valve 2, and the second return line.

[0086] When power is off, the second reversing valve 2 switches to the sixth operating position 22. The outlet of the fluid pressure source 1 is connected to the through port of the fourth one-way throttle valve 52 through the second reversing valve 2. The fluid then flows through the second pilot-operated one-way throttle valve 5 and into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. The through port of the third one-way throttle valve 4 is connected to the inlet of the second return line through the second reversing valve 2. The fluid at the ascending port A1 of the second actuator 14 flows back through the third one-way throttle valve 4, the second reversing valve 2, and the second return line.

[0087] When the fluid pressure source 1 is outputting, the fluid control valve 10 switches to the closed position 101. When the fluid pressure source 1 is shut off, the fluid control valve 10 switches to the open position 102. The outlet of the first accumulator 13 is connected to the closing port B2 of the first actuator 15 through the fluid control valve 10 and the fifth one-way throttle valve 7, thereby closing the first actuator 15. The outlet of the first accumulator 13 is connected to the descending port A2 of the second actuator 14 through the fluid control valve 10 and the fourth one-way valve 9, thereby descending the second actuator 14.

[0088] It should be noted that when the fluid control valve 10 is switched to the open position 102, the fluid at the outlet of the first accumulator 13 is split into two paths: one path passes through the fifth one-way throttle valve 7 and reaches the closing port B2 of the first actuator 15. The other path passes through the fourth one-way valve 9 and reaches the descending port A2 of the second actuator 14. Since the fluid flows directly through the fourth one-way valve 9, it takes less time to reach the descending port A2 of the second actuator 14. However, since the fluid enters the throttle opening of the fifth one-way throttle valve 7 after passing through the throttle opening, it takes longer to reach the closing port B2 of the first actuator 15. This creates a time difference between the operation of the first actuator 15 and the second actuator 14, causing the second actuator 14 to descend first, followed by a delay before the first actuator 15 closes. This delay is approximately 1 to 15 seconds, preferably 5 to 10 seconds, and can be adjusted flexibly based on actual conditions.

[0089] It should be noted that in this embodiment, the second actuator 14 descends first, followed by the closing of the first actuator 15. Therefore, the fourth one-way valve 9 and the fifth one-way throttle valve 7 are designed to achieve delayed operation of the first actuator 15. Alternatively, the first actuator 15 can be a rotary cylinder, and the second actuator 14 can be a lifting cylinder. The first and second actuators 15 and 14 can communicate with each other to open and close the radiation device, thereby turning the radiation source on and off.

[0090] In some other embodiments, if the actions of the first actuator 15 and the second actuator 14 are not sequential, the fifth one-way throttle valve 7 can also be replaced by a one-way valve, the inlet of the one-way valve is connected to the fluid control valve 10, and the outlet of the one-way valve is connected to the closing port B2 of the first actuator 15.

[0091] The automatic shutdown control device provided in this embodiment works as follows under various working conditions:

[0092] Combined with Figure 5, under normal power and ventilation conditions, the working principle of turning on the radiation source is as follows:

[0093] Under normal power-on and ventilation conditions, the solenoid valve 3 is energized and switches to the third working position 31 . The gas of the fluid pressure source 1 flows from branch b through the solenoid valve 3 and the second one-way valve 8 into the first accumulator 13 , and the first accumulator 13 is filled.

[0094] When first reversing valve 110 is energized, it switches to its first operating position 122. Gas from fluid pressure source 1 flows from branch d through first reversing valve 110 and first one-way throttle valve 6 into open port B1 of first actuator 15, causing first actuator 15 to open. Gas from closed port B2 of first actuator 15 is discharged through first pilot-operated one-way throttle valve 11, first reversing valve 110, first return line, and first muffler 16.

[0095] After first actuator 15 is activated, a preset interval passes, controlling power to second reversing valve 2, which switches to fifth operating position 21. Gas from fluid pressure source 1 flows from branch a through second reversing valve 2 and third one-way throttle valve 4 into rising port A1 of second actuator 14, causing second actuator 14 to rise. Gas from descending port A2 of second actuator 14 is discharged through second pilot-operated one-way throttle valve 5, second reversing valve 2, second return line, and first muffler 16. The radiation device activates the radiation source.

[0096] In conjunction with Figure 6, the working principle of shutting down the radiation source normally or shutting down the radiation source due to sudden power failure under normal power-on and ventilation conditions is as follows:

[0097] When power is removed from the second reversing valve 2, it switches to the sixth operating position 22. Gas from the fluid pressure source 1 flows from branch a through the second reversing valve 2 and the second pilot-operated one-way throttle valve 5 into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. Gas from the ascending port A1 of the second actuator 14 is discharged through the third one-way throttle valve 4, the second reversing valve 2, the second return line, and the second muffler 17.

[0098] The solenoid valve 3 loses power and switches to the fourth working position 32 , being in a closed state.

[0099] The first reversing valve 110 loses power and switches to the second operating position 123. Gas from the fluid pressure source 1 flows from branch d through the first reversing valve 110 and the first pilot-operated one-way throttle valve 11 into the closed port B2 of the first actuator 15, closing the first actuator 15. Gas from the open port B1 of the first actuator 15 is discharged through the first one-way throttle valve 6, the first reversing valve 110, the first return line, and the second muffler 17. The radiation device shuts down the radiation source.

[0100] Combined with Figure 7, the working principle of the radioactive source automatically shutting down when the gas is suddenly cut off in the power-on and ventilation state is as follows:

[0101] In the power-on state, the first reversing valve 110 is energized to be located in the first working position 122 , and the second reversing valve 2 is energized to be located in the fifth working position 21 .

[0102] In the sudden gas outage state, branch c is suddenly disconnected, the control port of the fluid control valve 10 has no pressure, and the fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 is deflated, and the gas in the first accumulator 13 is divided into two paths after passing through the fluid control valve 10:

[0103] The gas flows through the fourth check valve 9 and into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. At this point, the second pilot-operated one-way throttle valve 5 is closed, preventing leakage. The gas at the ascending port A1 of the second actuator 14 flows sequentially through the third one-way throttle valve 4, the second reversing valve 2, and branch a, returning to the main gas path.

[0104] The other path passes through the fifth one-way throttle valve 7 and enters the closed port B2 of the first actuator 15, closing the first actuator 15. At this point, the first pilot-operated one-way throttle valve 11 is closed, preventing leakage. The gas from the open port B1 of the first actuator 15 passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d, returning to the main gas path. The radiation device shuts down the radiation source.

[0105] Because the gas flows directly through the fourth one-way valve 9, it takes less time for the gas in the first accumulator 13 to reach the descending port A2 of the second actuator 14. However, when the gas passes through the fifth one-way throttle valve 7 and enters through the throttle opening of the fifth one-way throttle valve 7, it takes longer for the gas in the first accumulator 13 to reach the closing port B2 of the first actuator 15. This creates a time difference between the operation of the first actuator 15 and the second actuator 14, causing the second actuator 14 to descend first before the first actuator 15 closes.

[0106] Furthermore, the check valves 11 and 5 prevent gas from leaking through the main gas line and muffler. Furthermore, the second check valve 8 prevents backflow of gas from the first accumulator 13. These valves maintain pressure in the shutoff state. Therefore, the first accumulator 13 only requires a small gas tank of less than 200ml, resulting in a reliable structure, compact size, and low cost.

[0107] Combined with Figure 8, the working principle of the radioactive source automatically shutting down when the power and gas are suddenly cut off in the power-on and ventilation state:

[0108] In the sudden power failure state, the first reversing valve 110 , the solenoid valve 3 and the second reversing valve 2 lose power, the solenoid valve 3 is located in the fourth working position 32 , the first reversing valve 110 is located in the second working position 123 , and the second reversing valve 2 is located in the sixth working position 22 .

[0109] In the sudden gas outage state, branch c is suddenly disconnected, the control port of the fluid control valve 10 has no pressure, and the fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 is deflated, and the gas in the first accumulator 13 is divided into two paths after passing through the fluid control valve 10:

[0110] The gas flows through the fourth check valve 9 and into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. At this point, the second pilot-operated one-way throttle valve 5 is closed, preventing leakage. The gas at the ascending port A1 of the second actuator 14 flows sequentially through the third one-way throttle valve 4, the second reversing valve 2, and branch a, returning to the main gas path.

[0111] The other path passes through the fifth one-way throttle valve 7 and enters the closed port B2 of the first actuator 15, closing the first actuator 15. At this point, the first pilot-operated one-way throttle valve 11 is closed, preventing leakage. The gas from the open port B1 of the first actuator 15 passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d, returning to the main gas path. The radiation device shuts down the radiation source.

[0112] Other contents not mentioned in this embodiment are similar to those described in the first embodiment and will not be repeated here.

[0113] Third embodiment

[0114] Optionally, referring to FIG9 , based on the second embodiment, the automatic shutdown control device further includes a delay mechanism. The delay mechanism is connected to the solenoid valve 3 and the first reversing valve 110 . The first reversing valve 110 is an air-controlled valve, and the delay mechanism and the first reversing valve 110 together constitute an air-controlled delay valve.

[0115] When powered on, the solenoid valve 3 switches to the third working position 31 , and the outlet of the fluid pressure source 1 is connected to the first accumulator 13 through the solenoid valve 3 , replenishing fluid to the first accumulator 13 to maintain the pressure of the first accumulator 13 .

[0116] When power is off, the solenoid valve 3 switches to the fourth operating position 32. The outlet of the fluid pressure source 1 connects to the first reversing valve 110 through the solenoid valve 3 and the delay mechanism, causing the first reversing valve 110 to switch to the second operating position 123. Because the fluid passes through the delay mechanism, the first reversing valve 110 delays switching to the second operating position 123. This allows time for the second actuator 14 to descend, ensuring that the first actuator 15 closes after the second actuator 14 descends.

[0117] Optionally, the delay structure includes a sixth one-way throttle valve 121 and / or a second accumulator 125. Specifically, the delay structure may include only the sixth one-way throttle valve 121, with the through port of the sixth one-way throttle valve 121 connected to the first reversing valve 110, and the throttle port of the sixth one-way throttle valve 121 connected to the solenoid valve 3. Alternatively, only the second accumulator 125 may be provided, with the inlet of the second accumulator 125 connected to the solenoid valve 3, and the outlet of the second accumulator 125 connected to the first reversing valve 110.

[0118] In this embodiment, the delay structure includes both a sixth one-way throttle valve 121 and a second accumulator 125. The throttle port of the sixth one-way throttle valve 121 is connected to the solenoid valve 3. The through port of the sixth one-way throttle valve 121 is connected to the inlet of the second accumulator 125, and the outlet of the second accumulator 125 is connected to the first reversing valve 110. When the power is off, the fluid of the fluid pressure source 1 passes through the solenoid valve 3, the sixth one-way throttle valve 121, and the second accumulator 125 in sequence to reach the first reversing valve 110, causing the first reversing valve 110 to switch to the second working position 123. The fluid of the fluid pressure source 1 enters the closing port B2 of the first actuator 15 through the second working position 123 of the first reversing valve 110 and the first pilot one-way throttle valve 11, and the first actuator 15 performs the closing action.

[0119] It is easy to understand that in the event of a power outage, the gas from the fluid pressure source 1 first inflates and pressurizes the second accumulator 125 to a preset pressure, such as 0.2 MPA, over a period of time. The speed of the inflation process can be adjusted by the sixth one-way throttle valve 121. The inflation process is up to 15 seconds, and can also be flexibly set according to actual conditions to achieve a delay of 1 to 15 seconds, preferably 5 to 10 seconds. Only after the second accumulator 125 is inflated to the preset pressure will the gas act on the first reversing valve 110, and the first reversing valve 110 will switch from the first working position 122 to the second working position 123, achieving the effect of delayed switching, thereby achieving delayed closing of the first actuator 15.

[0120] In this embodiment, the first actuator 15 is a rotary cylinder, and the second actuator 14 is a lifting cylinder. The automatic shutdown control device is used in a radiation source system. The first actuator 15 and the second actuator 14 are respectively connected to a radiation device. The radiation device is used to turn the radiation source on and off.

[0121] When the radiation source needs to be activated, the first actuator 15 first rotates the radiation device to open, and the second actuator 14 then raises the radiation device. After the radiation device rotates to open, it then rises again after a preset time interval. The preset time interval ranges from 1 to 15 seconds and can be flexibly adjusted according to actual needs.

[0122] When the radiation source needs to be deactivated, the second actuator 14 first lowers the radiation device, and the first actuator 15 then rotates the radiation device to close. After the radiation device is lowered, a preset time interval passes before the radiation device rotates to close again. The preset time interval ranges from 1 to 15 seconds and can be flexibly adjusted based on actual needs.

[0123] The automatic shutdown control device provided in this embodiment works as follows under different working conditions:

[0124] Combined with Figure 9, the working principle of the radiation device when it is turned on under normal power and ventilation conditions is as follows:

[0125] Under normal power and ventilation conditions, solenoid valve 3 is energized and switches to the third working position 31. Gas from fluid pressure source 1 flows from branch b through solenoid valve 3 and second one-way valve 8 into first accumulator 13, completing the inflation of first accumulator 13. At this point, solenoid valve 3 and the delay mechanism are disconnected, and there is no pressure at the air control end of first reversing valve 110. First reversing valve 110 returns to the first working position 122. Gas from fluid pressure source 1 flows from branch d through first reversing valve 110 and first one-way throttle valve 6 into open port B1 of first actuator 15, causing first actuator 15 to open. Gas from closed port B2 of first actuator 15 is discharged through the first pilot-operated one-way throttle valve 11, first reversing valve 110, first return line, and first muffler 16.

[0126] After first actuator 15 is activated, a preset interval passes, controlling power to second reversing valve 2, which switches to fifth operating position 21. Gas from fluid pressure source 1 flows from branch a through second reversing valve 2 and third one-way throttle valve 4 into rising port A1 of second actuator 14, causing second actuator 14 to rise. Gas from descending port A2 of second actuator 14 is discharged through second pilot-operated one-way throttle valve 5, second reversing valve 2, second return line, and first muffler 16. The radiation device activates the radiation source.

[0127] Combined with Figure 10, the working principle of controlling the shutdown of the radiation device under normal power and ventilation conditions is as follows:

[0128] When the power to the second reversing valve 2 is removed, it switches to the sixth operating position 22. Gas from the fluid pressure source 1 flows from branch a through the second reversing valve 2 and the second pilot-operated one-way throttle valve 5 into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. Gas from the ascending port A1 of the second actuator 14 is discharged through the third one-way throttle valve 4, the second reversing valve 2, the second return line, and the second muffler 17.

[0129] After the second actuator 14 descends, the control solenoid valve 3 loses power, switching to the fourth working position 32. Gas from the fluid pressure source 1 flows from branch b, sequentially through the solenoid valve 3 and the delay mechanism. After the delay mechanism is inflated, it reaches the first reversing valve 110, causing the first reversing valve 110 to delay switching to the second working position 123 after the solenoid valve 3 loses power. Gas from the fluid pressure source 1 flows from branch d, through the first reversing valve 110 and the first pilot-operated one-way throttle valve 11, and into the closed port B2 of the first actuator 15, closing the first actuator 15. Gas from the open port B1 of the first actuator 15 is discharged through the first one-way throttle valve 6, the first reversing valve 110, the first return line, and the second muffler 17. The radiation device shuts off the radiation source.

[0130] It should be noted that the gas from the fluid pressure source 1 is divided into two paths after passing through the second working position 123 of the first reversing valve 110 and the first pilot one-way throttle valve 11 from branch d. One path enters the closing port B2 of the first actuator 15, and the other path is blocked by the closing position 101 of the fluid control valve 10 through the fifth one-way throttle valve 7, and is blocked by the intake air path of the second pilot one-way throttle valve 5 through the fifth one-way throttle valve 7 and the fourth one-way valve 9 to prevent air leakage.

[0131] Combined with Figure 10, the working principle of the automatic shutdown of the radiation source when a sudden power outage occurs in the power-on and ventilation state:

[0132] This state is similar to the second working condition mentioned above.

[0133] When a sudden power outage occurs, the solenoid valve 3 and the second reversing valve 2 lose power at the same time, and the solenoid valve 3 switches to the fourth working position 32 . At the same time, the second reversing valve 2 switches to the sixth working position 22 .

[0134] Second reversing valve 2 is switched to the sixth working position 22. Gas from fluid pressure source 1 flows from branch a through second reversing valve 2 and second pilot-operated one-way throttle valve 5 into descending port A2 of second actuator 14, causing second actuator 14 to descend. Gas from ascending port A1 of second actuator 14 is discharged through third one-way throttle valve 4, second reversing valve 2, the second return line, and the second muffler 17.

[0135] Solenoid valve 3 switches to the fourth working position 32. Gas from fluid pressure source 1 flows from branch b through solenoid valve 3, the delay mechanism, and first reversing valve 110. Pressure is applied to the air control end of first reversing valve 110, causing it to switch to the second working position 123. Gas from fluid pressure source 1 flows from branch d through first reversing valve 110 and the first pilot-operated one-way throttle valve 11, entering closed port B2 of first actuator 15. This closes first actuator 15. Gas from open port B1 of first actuator 15 is discharged through the first one-way throttle valve 6, the first reversing valve 110, the first return line, and the second muffler 17. The radiation device shuts off the radiation source.

[0136] As can be understood, when the solenoid valve 3 and the second reversing valve 2 lose power simultaneously, the second reversing valve 2 immediately switches to the sixth working position 22, and the second actuator 14 immediately descends. Because the first reversing valve 110 is connected to a delay mechanism, after the solenoid valve 3 loses power, the first reversing valve 110 does not immediately reverse direction. Instead, it waits until the second accumulator 125 in the delay mechanism is fully charged before switching to the second working position 123 and closing the first actuator 15. This time difference between the actions of the first actuator 15 and the second actuator 14 ensures that the first actuator 15 closes after the second actuator 14 has completed its descent, thereby deactivating the radiation source.

[0137] In this state, the gas of the fluid pressure source 1 is divided into two paths after passing through the second working position 123 of the first reversing valve 110 and the first pilot one-way throttle valve 11 from the branch d. One path enters the closing port B2 of the first actuator 15, and the other path passes through the fifth one-way throttle valve 7 and is blocked by the closing position 101 of the fluid control valve 10, as well as the air intake path of the second pilot one-way throttle valve 5, so that no air leakage occurs.

[0138] Combined with Figure 11, the working principle of the radioactive source automatically shutting down when there is a sudden gas outage in the power-on and ventilation state:

[0139] In the power-on state, the solenoid valve 3 and the second reversing valve 2 are energized, the solenoid valve 3 is located in the third working position 31 , and the second reversing valve 2 is located in the fifth working position 21 .

[0140] In the sudden gas outage state, there is no gas supply at the outlet of the fluid pressure source 1, and no gas is supplied to branches a, b, c, and d. Branch c is suddenly disconnected, and the control port of the fluid control valve 10 is pressureless. The fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 is deflated. After passing through the fluid control valve 10, the gas in the first accumulator 13 is divided into two paths:

[0141] The gas flows through the fourth check valve 9 and into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. At this point, the second pilot-operated one-way throttle valve 5 is closed, preventing leakage. The gas at the ascending port A1 of the second actuator 14 flows sequentially through the third one-way throttle valve 4, the second reversing valve 2, and branch a, returning to the main gas path.

[0142] The other path passes through the fifth one-way throttle valve 7 and enters the closed port B2 of the first actuator 15, closing the first actuator 15. At this point, the first pilot-operated one-way throttle valve 11 is closed, preventing leakage. The gas from the open port B1 of the first actuator 15 passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d, returning to the main gas path. The radiation device shuts down the radiation source.

[0143] It can be understood that the main gas circuit here refers to the pipeline connected to the outlet of the fluid pressure source 1, and four branches a, b, c, and d are provided on the main gas circuit.

[0144] Because the gas flows directly through the fourth one-way valve 9, it takes less time for the gas in the first accumulator 13 to reach the descending port A2 of the second actuator 14. However, when the gas passes through the fifth one-way throttle valve 7 and enters through the throttle opening of the fifth one-way throttle valve 7, it takes longer for the gas in the first accumulator 13 to reach the closing port B2 of the first actuator 15. This creates a time difference between the operation of the first actuator 15 and the second actuator 14, causing the second actuator 14 to descend first before the first actuator 15 closes.

[0145] Furthermore, the check valves 11 and 5 prevent gas from leaking through the main gas line and muffler. Furthermore, the second check valve 8 prevents backflow of gas from the first accumulator 13. These valves maintain pressure in the shutoff state. Therefore, the first accumulator 13 only requires a small gas tank of less than 200ml, resulting in a reliable structure, compact size, and low cost.

[0146] Combined with Figure 12, the working principle of the radioactive source automatically shutting down when the power and gas are suddenly cut off in the power-on and ventilation state:

[0147] In the sudden power failure state, the solenoid valve 3 and the second reversing valve 2 lose power, the solenoid valve 3 is located in the fourth working position 32 , and the second reversing valve 2 is located in the sixth working position 22 .

[0148] In the sudden gas outage state, branch c is suddenly disconnected, the control port of the fluid control valve 10 has no pressure, and the fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 is deflated, and the gas in the first accumulator 13 is divided into two paths after passing through the fluid control valve 10:

[0149] The gas flows through the fourth one-way valve 9 and into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. At this point, the second pilot-operated one-way throttle valve 5 is closed, preventing leakage. The gas at the ascending port A1 of the second actuator 14 flows sequentially through the third one-way throttle valve 4, the second reversing valve 2, and the second return line, ultimately being discharged from the second muffler 17.

[0150] The other path passes through the fifth one-way throttle valve 7 and enters the closed port B2 of the first actuator 15, closing the first actuator 15. At this point, the first pilot-operated one-way throttle valve 11 is closed, preventing leakage. The gas from the open port B1 of the first actuator 15 passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d, returning to the main gas path. The radiation device shuts down the radiation source.

[0151] Since the throttle port of the fifth one-way throttle valve 7 is connected to the fluid control valve 10, the inlet of the fourth one-way valve 9 is connected to the fluid control valve 10, and the fourth one-way valve 9 is straight-through, the gas acts on the closing port B2 of the first actuator 15 with a delay, that is, the second actuator 14 descends first and then the first actuator 15 closes.

[0152] The automatic shutdown control device provided in the disclosed embodiment utilizes a delay mechanism to achieve sequential operation of the first actuator 15 and the second actuator 14 in a power-off state. Furthermore, the fifth one-way throttle valve 7 and the fourth one-way valve 9 are each connected to the first accumulator 13. This allows for sequential operation of the first actuator 15 and the second actuator 14 in a power-off state, with the second actuator 14 descending first and the first actuator 15 closing later. This prevents simultaneous operation of the two actuators, which could cause interference.

[0153] In the normal power-on and ventilation state, the fourth one-way valve 9 plays a role of isolation, so that the operations of the first actuator 15 and the second actuator 14 do not affect each other.

[0154] The automatic shutdown control device can simultaneously adapt to three abnormal situations: sudden power outage, sudden gas outage, or sudden power and gas outage. In each abnormal situation, the first actuator 15 and the second actuator 14 can be shut down and reset without interfering with the operation and reset of the first actuator 15 and the second actuator 14 under normal conditions.

[0155] Other contents not mentioned in this embodiment are similar to those described in the first and second embodiments and will not be described again here.

[0156] Fourth embodiment

[0157] In conjunction with Figure 13 , an embodiment of the present disclosure further provides an automatic shutdown control device suitable for automatic shutdown in a power-off state. The automatic shutdown control device includes a first actuator 15, a first one-way throttle valve 6, a first pilot one-way throttle valve 11, a first reversing valve 110, a fluid pressure source 1, a first return line, and a delay structure. The throttle port of the first one-way throttle valve 6 is connected to the open port B1 of the first actuator 15. The first pilot one-way throttle valve 11 includes a second one-way throttle valve 112 and a first one-way valve 111. The inlet of the first one-way valve 111 is connected to the throttle port of the second one-way throttle valve 112 and the through port of the first one-way throttle valve 6, respectively. The outlet of the first one-way valve 111 is connected to the closed port B2 of the first actuator 15. The through port of the first one-way throttle valve 6 is connected to the first reversing valve 110, and the through port of the second one-way throttle valve 112 is connected to the first reversing valve 110. The outlet of the fluid pressure source 1 is connected to the first reversing valve 110. The inlet of the first return line is connected to the first reversing valve 110. The delay structure is connected to the first reversing valve 110, and the outlet of the fluid pressure source 1 is connected to the delay structure.

[0158] When powered on, the first reversing valve 110 switches to the first working position 122. The outlet of the fluid pressure source 1 is connected to the through port of the first one-way throttle valve 6 through the first reversing valve 110. The through port of the second one-way throttle valve 112 is connected to the inlet of the first return line through the first reversing valve 110. The first actuator 15 is opened.

[0159] When power is off, the outlet of fluid pressure source 1 is connected to the delay mechanism, causing first reversing valve 110 to switch to second working position 123. The outlet of fluid pressure source 1 is connected to the through port of second one-way throttle valve 112 via first reversing valve 110, while the through port of first one-way throttle valve 6 is connected to the inlet of the first return line via first reversing valve 110. First actuator 15 closes after a delay.

[0160] Optionally, the automatic shutdown control device further includes a solenoid valve 3, to which the outlet of the fluid pressure source 1 is connected. When power is on, the solenoid valve 3 switches to the third working position 31, disconnecting the solenoid valve 3 from the delay mechanism. When power is off, the solenoid valve 3 switches to the fourth working position 32, connecting the outlet of the fluid pressure source 1 to the first reversing valve 110 via the solenoid valve 3 and the delay mechanism. This allows the first reversing valve 110 to switch to the second working position 123 after a delay upon power failure, closing the first actuator 15. Specifically, after power is off, the first actuator 15 does not close immediately, but rather after a delay.

[0161] Optionally, the delay structure includes at least one of a sixth one-way throttle valve 121 and a second accumulator 125. In this embodiment, the delay structure includes the sixth one-way throttle valve 121 and the second accumulator 125. The throttle port of the sixth one-way throttle valve 121 is connected to the solenoid valve 3, the through port of the sixth one-way throttle valve 121 is connected to the inlet of the second accumulator 125, and the outlet of the second accumulator 125 is connected to the first reversing valve 110.

[0162] Optionally, the automatic shutdown control device further includes a second actuator 14, a third one-way throttle valve 4, a second pilot one-way throttle valve 5, a second reversing valve 2, and a second return line. The throttle port of the third one-way throttle valve 4 is connected to the rising port A1 of the second actuator 14. The second pilot one-way throttle valve 5 includes a fourth one-way throttle valve 52 and a third one-way valve 51. The inlet of the third one-way valve 51 is connected to the throttle port of the fourth one-way throttle valve 52 and the through port of the third one-way throttle valve 4, respectively. The outlet of the third one-way valve 51 is connected to the descending port A2 of the second actuator 14. The through port of the third one-way throttle valve 4 is connected to the second reversing valve 2, and the through port of the fourth one-way throttle valve 52 is connected to the second reversing valve 2. The outlet of the fluid pressure source 1 is connected to the second reversing valve 2. The inlet of the second return line is connected to the second reversing valve 2.

[0163] When powered on, the second reversing valve 2 switches to the fifth working position 21. The outlet of the fluid pressure source 1 is connected to the through port of the third one-way throttle valve 4 through the second reversing valve 2. The through port of the fourth one-way throttle valve 52 is connected to the inlet of the second return line through the second reversing valve 2. The second actuator 14 rises.

[0164] When the power is off, the second reversing valve 2 switches to the sixth working position 22, the outlet of the fluid pressure source 1 is connected to the straight-through port of the fourth one-way throttle valve 52 through the second reversing valve 2, and the straight-through port of the third one-way throttle valve 4 is connected to the inlet of the second return line through the second reversing valve 2; the second actuator 14 descends.

[0165] The outlet of the fluid pressure source 1 is connected to the delay structure, the first reversing valve 110 is switched to the second working position 123, and after the second actuator 14 descends, the first actuator 15 is closed again.

[0166] Compared to the third embodiment, this embodiment omits the first accumulator 13, the second one-way valve 8, the fluid control valve 10, the fourth one-way valve 9, and the fifth one-way throttle valve 7. This allows for automatic shutdown in the event of a power outage. Other details not mentioned in this embodiment are similar to those described in the third embodiment and are not further elaborated here.

[0167] The automatic shutdown control device provided in this embodiment works as follows under various working conditions:

[0168] Combined with Figure 13, the working principle of the radiation source when it is powered on and ventilated is as follows:

[0169] Under normal power and ventilation conditions, solenoid valve 3 is energized and switches to its third operating position 31. At this point, there is no conduction between solenoid valve 3 and the delay mechanism, and no pressure is applied to the air-controlled end of first reversing valve 110. First reversing valve 110 returns to its first operating position 122. Gas from fluid pressure source 1 flows from branch d through first reversing valve 110 and first one-way throttle valve 6 into open port B1 of first actuator 15, causing first actuator 15 to open. Gas from closed port B2 of first actuator 15 is discharged through the first pilot-operated one-way throttle valve 11, first reversing valve 110, first return line, and first muffler 16.

[0170] After first actuator 15 is activated, a preset interval passes, controlling power to second reversing valve 2, which switches to fifth operating position 21. Gas from fluid pressure source 1 flows from branch a through second reversing valve 2 and third one-way throttle valve 4 into rising port A1 of second actuator 14, causing second actuator 14 to rise. Gas from descending port A2 of second actuator 14 is discharged through second pilot-operated one-way throttle valve 5, second reversing valve 2, second return line, and first muffler 16. The radiation device activates the radiation source.

[0171] In conjunction with Figure 14, the working principle of controlling the normal shutdown of the radiation device or the sudden power failure shutdown under normal power-on and ventilation conditions is as follows:

[0172] When power is removed from the second reversing valve 2, it switches to the sixth operating position 22. Gas from the fluid pressure source 1 flows from branch a through the second reversing valve 2 and the second pilot-operated one-way throttle valve 5 into the descending port A2 of the second actuator 14, causing the second actuator 14 to descend. Gas from the ascending port A1 of the second actuator 14 is discharged through the third one-way throttle valve 4, the second reversing valve 2, the second return line, and the second muffler 17.

[0173] When solenoid valve 3 loses power, it switches to its fourth operating position 32. Gas from fluid pressure source 1 flows from branch b, sequentially passing through solenoid valve 3 and the delay mechanism. After the delay mechanism is inflated, it reaches first reversing valve 110, causing first reversing valve 110 to delay switching to its second operating position 123 after solenoid valve 3 loses power. Gas from fluid pressure source 1 flows from branch d, passes through first reversing valve 110 and the first pilot-operated one-way throttle valve 11, and enters closed port B2 of first actuator 15, closing first actuator 15. Gas from open port B1 of first actuator 15 is discharged through the first one-way throttle valve 6, first reversing valve 110, the first return line, and the second muffler 17. The radiation device shuts down the radiation source.

[0174] It should be noted that the gas from the fluid pressure source 1 is divided into two paths after passing through the second working position 123 of the first reversing valve 110 and the first pilot one-way throttle valve 11 from branch d. One path enters the closing port B2 of the first actuator 15, and the other path is blocked by the closing position 101 of the fluid control valve 10 through the fifth one-way throttle valve 7, and is blocked by the intake air path of the second pilot one-way throttle valve 5 through the fifth one-way throttle valve 7 and the fourth one-way valve 9 to prevent air leakage.

[0175] In this embodiment, other parts not mentioned are similar to those described in the first embodiment, the second embodiment, and the third embodiment, and are not described again here.

[0176] The disclosed embodiments also provide a radiation source system comprising a radiation device and the aforementioned automatic shutdown control device. The radiation device is used to turn the radiation source on and off. A first actuator 15 is connected to the radiation device and is used to activate and deactivate the radiation device. Application of the aforementioned automatic shutdown control device in the radiation source system can automatically shut down the radiation device in the event of a power outage, gas outage, or both, eliminating manual shutdown operations and the risk of radiation exposure to operators near the radiation source, resulting in increased safety.

[0177] Optionally, the radiation source system includes a first actuator 15 and a second actuator 14, each of which is connected to a radiation device. When the radiation device needs to be turned on, the first actuator 15 is turned on first, and then the second actuator 14 is raised. When the radiation device needs to be turned off, the second actuator 14 is lowered first, and then the first actuator 15 is turned off.

[0178] Of course, in addition to being used in radioactive source systems, the automatic shutdown control device can also be used in other automatic control fields. It is suitable for scenarios where one actuator is in motion, and it is also suitable for scenarios where two actuators are in motion one after another. It has a wide range of application scenarios.

[0179] In summary, the automatic shutdown control device and radiation source system provided by the embodiments of the present disclosure have the following beneficial effects, including:

[0180] The automatic shutdown control device provided by the disclosed embodiments can simultaneously adapt to three abnormal conditions: sudden power outage, sudden gas outage, or sudden power and gas outage. In each abnormal condition, the first actuator 15 and the second actuator 14 can be shut down and reset. This does not interfere with the normal operation and reset of the first and second actuators 15, 14. The device has a simple and reliable structure, low cost, and can automatically shut down the first and second actuators 15, 14 in the event of a sudden abnormality, eliminating the need for manual operation. This improves the automation level of the device and reduces the risks associated with manual operation.

[0181] The disclosed embodiments provide a radiation source system comprising a radiation device and the aforementioned automatic shutdown control device. The radiation device is used to turn the radiation source on and off. In the event of a power outage and / or current interruption, the first actuator 15 and the second actuator 14 can automatically shut down the radiation source, eliminating the need for manual operation. This reliable structure reduces the risk of exposure to radiation when manually operating the device in close proximity to the radiation source, providing enhanced safety.

[0182] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims. Industrial Applicability

[0183] An embodiment of the present disclosure provides an automatic shutdown control device. When power is on, a first reversing valve switches to a first working position. The outlet of the fluid pressure source is connected to the through port of a first one-way throttle valve through the first reversing valve, and the through port of a second one-way throttle valve is connected to the inlet of a first return line through the first reversing valve. When power is off, the first reversing valve switches to a second working position. The outlet of the fluid pressure source is connected to the through port of the second one-way throttle valve through the first reversing valve, and the through port of the first one-way throttle valve is connected to the inlet of the first return line through the first reversing valve. When the fluid pressure source is outputting, the fluid control valve switches to a closed position. When the fluid pressure source is cut off, the fluid control valve switches to an open position, and the outlet of the first accumulator is connected to the closed port of the first actuator through the fluid control valve. This arrangement allows the first actuator to automatically close in the event of a power outage and / or a flow interruption, eliminating the need for manual operation. This improves the automation level of the device, ensures structural reliability, and reduces the risks associated with manual operation.

[0184] Embodiments of the present disclosure also provide a radiation source system comprising a radiation device and the aforementioned automatic shutdown control device. The radiation device is used to turn the radiation source on and off. A first actuator is connected to the radiation device and is used to activate and deactivate the radiation device. In the event of a power outage and / or current interruption, the first actuator can automatically shut down the radiation source, eliminating the need for manual operation. This provides a reliable structure, reduces the risk of exposure to radiation when operating the device in close proximity to the radiation source, and enhances safety.

[0185] Furthermore, it is understood that the automatic shutdown control device and radiation source system provided by the embodiments of the present disclosure are reproducible and can be used in a variety of industrial applications. For example, the automatic shutdown control device and radiation source system provided by the embodiments of the present disclosure can be used in fields related to automatic control technology.

Claims

1. An automatic shutdown control device, characterized in that Comprising: A first actuator (15); A first one-way throttle valve (6), the throttle orifice of the first one-way throttle valve (6) being connected to the opening port (B1) of the first actuator (15); A first pilot-operated one-way throttle valve (11), which includes a second one-way throttle valve (112) and a first one-way valve (111), the inlet of the first one-way valve (111) being respectively connected to the throttle orifice of the second one-way throttle valve (112) and the straight-through port of the first one-way throttle valve (6), and the outlet of the first one-way valve (111) being connected to the closing port (B2) of the first actuator (15); A first reversing valve (110), the straight-through port of the first one-way throttle valve (6) being connected to the first reversing valve (110), and the straight-through port of the second one-way throttle valve (112) being connected to the first reversing valve (110); A fluid pressure source (1), the outlet of the fluid pressure source (1) being connected to the first reversing valve (110); A first return pipeline, the inlet of the first return pipeline being connected to the first reversing valve (110); A fluid control valve (10), the closing port (B2) of the first actuator (15) being connected to the fluid control valve (10), and the control port of the fluid control valve (10) being connected to the outlet of the fluid pressure source (1); A first accumulator (13), the outlet of the first accumulator (13) being connected to the fluid control valve (10); When powered on, the first reversing valve (110) switches to the first working position (122), the outlet of the fluid pressure source (1) is connected to the straight-through port of the first one-way throttle valve (6) through the first reversing valve (110), and the straight-through port of the second one-way throttle valve (112) is connected to the inlet of the first return pipeline through the first reversing valve (110); When powered off, the first reversing valve (110) switches to the second working position (123), the outlet of the fluid pressure source (1) is connected to the straight-through port of the second one-way throttle valve (112) through the first reversing valve (110), and the straight-through port of the first one-way throttle valve (6) is connected to the inlet of the first return pipeline through the first reversing valve (110); When the fluid pressure source (1) outputs, the fluid control valve (10) switches to the closed position (101); When the fluid pressure source (1) cuts off the flow, the fluid control valve (10) switches to the open position (102), and the outlet of the first accumulator (13) is connected to the closing port (B2) of the first actuator (15) through the fluid control valve (10).

2. The automatic shutdown control device according to claim 1, wherein Further comprising a second one-way valve (8); The inlet of the second one-way valve (8) is connected to the outlet of the fluid pressure source (1), and the outlet of the second one-way valve (8) is connected to the first accumulator (13).

3. The automatic shutdown control device according to claim 1, wherein Further comprising a solenoid valve (3), the solenoid valve (3) being connected to the outlet of the fluid pressure source (1); When powered on, the solenoid valve (3) switches to the third working position (31), and the outlet of the fluid pressure source (1) is connected to the first accumulator (13) through the solenoid valve (3); When power is off, the solenoid valve (3) switches to the fourth working position (32), and the outlet of the fluid pressure source (1) is connected to the first reversing valve (110) through the solenoid valve (3), so that the first reversing valve (110) switches to the second working position (123).

4. The automatic shutdown control device according to claim 1, wherein It further includes: A second actuator (14); A third one-way throttle valve (4), the throttle orifice of the third one-way throttle valve (4) is connected to the rising port (A1) of the second actuator (14); A second pilot-operated one-way throttle valve (5), which includes a fourth one-way throttle valve (52) and a third one-way valve (51). The inlet of the third one-way valve (51) is respectively connected to the throttle orifice of the fourth one-way throttle valve (52) and the straight-through port of the third one-way throttle valve (4), and the outlet of the third one-way valve (51) is connected to the descending port (A2) of the second actuator (14); A second reversing valve (2), the straight-through port of the third one-way throttle valve (4) is connected to the second reversing valve (2), and the straight-through port of the fourth one-way throttle valve (52) is connected to the second reversing valve (2); The outlet of the fluid pressure source (1) is connected to the second reversing valve (2); A second return pipeline, the inlet of the second return pipeline is connected to the second reversing valve (2); A fourth one-way valve (9), the inlet of the fourth one-way valve (9) is connected to the fluid control valve (10), and the outlet of the fourth one-way valve (9) is connected to the descending port (A2); A fifth one-way throttle valve (7), the throttle orifice of the fifth one-way throttle valve (7) is connected to the fluid control valve (10), and the straight-through port of the fifth one-way throttle valve (7) is connected to the closing port (B2); When power is on, the second reversing valve (2) switches to the fifth working position (21), the outlet of the fluid pressure source (1) is connected to the straight-through port of the third one-way throttle valve (4) through the second reversing valve (2), and the straight-through port of the fourth one-way throttle valve (52) is connected to the inlet of the second return pipeline through the second reversing valve (2); When power is off, the second reversing valve (2) switches to the sixth working position (22), the outlet of the fluid pressure source (1) is connected to the straight-through port of the fourth one-way throttle valve (52) through the second reversing valve (2), and the straight-through port of the third one-way throttle valve (4) is connected to the inlet of the second return pipeline through the second reversing valve (2); When the fluid pressure source (1) cuts off the flow, the fluid control valve (10) switches to the open position (102), and the outlet of the first energy storage device (13) is sequentially connected to the closing port (B2) of the first actuator (15) through the fluid control valve (10) and the fifth one-way throttle valve (7); the outlet of the first energy storage device (13) is sequentially connected to the descending port (A2) of the second actuator (14) through the fluid control valve (10) and the fourth one-way valve (9).

5. The automatic shutdown control device according to claim 4, characterized in that, It further includes a solenoid valve (3) and a delay structure; The solenoid valve (3) is connected to the outlet of the fluid pressure source (1); The delay structure is respectively connected to the solenoid valve (3) and the first reversing valve (110); When powered on, the solenoid valve (3) switches to the third working position (31), and the outlet of the fluid pressure source (1) is connected to the first energy storage device (13) through the solenoid valve (3); When powered off, the solenoid valve (3) switches to the fourth working position (32), and the outlet of the fluid pressure source (1) is connected to the first reversing valve (110) through the solenoid valve (3) and the delay structure, so that the first reversing valve (110) switches to the second working position (123); after the second actuator (14) descends, the first actuator (15) closes again.

6. The automatic shutdown control device according to claim 5, wherein The delay structure includes: A sixth one-way throttle valve (121), the direct port of the sixth one-way throttle valve (121) is connected to the first reversing valve (110), and the throttle port of the sixth one-way throttle valve (121) is connected to the solenoid valve (3); And / or, the delay structure includes a second energy storage device (125), the inlet of the second energy storage device (125) is connected to the solenoid valve (3), and the outlet of the second energy storage device (125) is connected to the first reversing valve (110).

7. An automatic shutdown control device, characterized in that Comprises: A first actuator (15); A first one-way throttle valve (6), the throttle port of the first one-way throttle valve (6) is connected to the opening port (B1) of the first actuator (15); A first pilot-operated one-way throttle valve (11), which includes a second one-way throttle valve (112) and a first one-way valve (111), the inlet of the first one-way valve (111) is respectively connected to the throttle port of the second one-way throttle valve (112) and the direct port of the first one-way throttle valve (6), and the outlet of the first one-way valve (111) is connected to the closing port (B2) of the first actuator (15); A first reversing valve (110), the direct port of the first one-way throttle valve (6) is connected to the first reversing valve (110), and the direct port of the second one-way throttle valve (112) is connected to the first reversing valve (110); A fluid pressure source (1), the outlet of the fluid pressure source (1) is connected to the first reversing valve (110); A first return pipeline, the inlet of the first return pipeline is connected to the first reversing valve (110); A delay structure, the delay structure is connected to the first reversing valve (110); the outlet of the fluid pressure source (1) is connected to the delay structure; When powered on, the first reversing valve (110) switches to the first working position (122), the outlet of the fluid pressure source (1) is connected to the direct port of the first one-way throttle valve (6) through the first reversing valve (110), and the direct port of the second one-way throttle valve (112) is connected to the inlet of the first return pipeline through the first reversing valve (110); When power is off, the outlet of the fluid pressure source (1) is connected to the delay structure so that the first reversing valve (110) switches to the second working position (123). The outlet of the fluid pressure source (1) is connected to the straight-through port of the second one-way throttle valve (112) through the first reversing valve (110). The straight-through port of the first one-way throttle valve (6) is connected to the inlet of the first return pipeline through the first reversing valve (110).

8. The automatic shutdown control device according to claim 7, wherein It further includes: a solenoid valve (3), the outlet of the fluid pressure source (1) is connected to the solenoid valve (3); When power is on, the solenoid valve (3) switches to the third working position (31), and the solenoid valve (3) is not connected to the delay structure; When power is off, the solenoid valve (3) switches to the fourth working position (32), and the outlet of the fluid pressure source (1) is connected to the first reversing valve (110) through the solenoid valve (3) and the delay structure, so that the first reversing valve (110) switches to the second working position (123).

9. The automatic shutdown control device according to claim 8, wherein The delay structure includes: a sixth one-way throttle valve (121), the straight-through port of the sixth one-way throttle valve (121) is connected to the first reversing valve (110), and the throttle port of the sixth one-way throttle valve (121) is connected to the solenoid valve (3); and / or, the delay structure includes a second energy storage device (125), the inlet of the second energy storage device (125) is connected to the solenoid valve (3), and the outlet of the second energy storage device (125) is connected to the first reversing valve (110).

10. The automatic shutdown control device according to claim 7, wherein It further includes: a second actuator (14); a third one-way throttle valve (4), the throttle port of the third one-way throttle valve (4) is connected to the rising port (A1) of the second actuator (14); a second pilot-operated one-way throttle valve (5), which includes a fourth one-way throttle valve (52) and a third one-way valve (51), the inlet of the third one-way valve (51) is respectively connected to the throttle port of the fourth one-way throttle valve (52) and the straight-through port of the third one-way throttle valve (4), and the outlet of the third one-way valve (51) is connected to the descending port (A2) of the second actuator (14); a second reversing valve (2), the straight-through port of the third one-way throttle valve (4) is connected to the second reversing valve (2), and the straight-through port of the fourth one-way throttle valve (52) is connected to the second reversing valve (2); the outlet of the fluid pressure source (1) is connected to the second reversing valve (2); a second return pipeline, the inlet of the second return pipeline is connected to the second reversing valve (2); When power is on, the second reversing valve (2) switches to the fifth working position (21), the outlet of the fluid pressure source (1) is connected to the straight-through port of the third one-way throttle valve (4) through the second reversing valve (2), and the straight-through port of the fourth one-way throttle valve (52) is connected to the inlet of the second return pipeline through the second reversing valve (2); When power is off, the second reversing valve (2) switches to the sixth working position (22), the outlet of the fluid pressure source (1) is connected to the direct port of the fourth one-way throttle valve (52) through the second reversing valve (2), and the direct port of the third one-way throttle valve (4) is connected to the inlet of the second return pipeline through the second reversing valve (2); The outlet of the fluid pressure source (1) is connected to the delay structure, the first reversing valve (110) switches to the second working position (123), and after the second actuator (14) descends, the first actuator (15) closes again.

11. A radioactive source system, characterized in that, It includes a radiation device and the automatic shutdown control device according to any one of claims 1-10; The radiation device is used to turn on or off a radiation source; The first actuator (15) is connected to the radiation device and is used to execute the opening and closing of the radiation device.

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