Automatic shutdown control device and radioactive source system

Abstract

An automatic shutdown control device and a radiation source system are disclosed. 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 directional valve (110), a fluid pressure source (1), a first return line, a fluid control valve (10), and a first accumulator (13). The first pilot-operated one-way throttle valve (11) includes a second one-way throttle valve (112) and a first one-way valve (111). When power is off, the first directional valve (110) switches to a 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 directional valve (110), and the through port of the first one-way throttle valve (6) is connected to the inlet of the first return line through the first directional valve (110). 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 disconnected, the fluid control valve (10) switches to the open position (102), and the outlet of the first accumulator (13) is connected to the closed port (B2) of the first actuator (15) through the fluid control valve (10). This device can automatically complete the shutdown action in the state of power failure and / or flow interruption, without the need for manual shutdown, reducing the risks associated with manual operation.

Description

Technical Field

[0001] This disclosure relates to the field of automatic control technology, and more specifically, to an automatic shutdown control device and a radiation source system. Background Technology

[0002] The radiation measuring equipment is equipped with a radiation source, and the radiation emitted by this source poses a certain risk to the human body. The radiation source automatically turns on when the equipment is running and automatically turns off when not in operation. However, in the event of a sudden power outage or gas interruption, the radiation measuring equipment cannot automatically turn off the radiation source. Personnel must then manually turn off the radiation source, posing a certain radiation safety risk. Furthermore, if the shutdown of the radiation source requires the coordinated action of multiple actuators, the sequence of actions between these actuators must be controlled. Summary of the Invention

[0003] The purpose of this disclosure is to solve one or more technical problems mentioned above. Embodiments of this disclosure can be implemented as follows:

[0004] In a first aspect, this disclosure provides an automatic shutdown control device, comprising:

[0005] First actuator;

[0006] The first one-way throttle valve has its throttle port connected to the opening port of the first actuator.

[0007] The first pilot-operated one-way throttle valve includes a second one-way throttle valve and a first one-way valve. The inlet of the first one-way valve is connected to the throttle port of the second one-way throttle valve and the straight-through port of the first one-way throttle valve, respectively. The outlet of the first one-way valve is connected to the closing port of the first actuator.

[0008] The first reversing valve, 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;

[0009] A fluid pressure source, the outlet of which is connected to the first reversing valve;

[0010] The first return line is connected to the first directional valve at its inlet.

[0011] 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;

[0012] A first energy storage device, the outlet of which is connected to the fluid control valve;

[0013] When energized, the first reversing valve switches to the first working position, the outlet of the fluid pressure source is connected to the straight-through port of the first one-way throttle valve through the first reversing valve, and the straight-through port of the second one-way throttle valve is connected to the inlet of the first return pipeline through the first reversing valve.

[0014] When the power is off, the first reversing valve switches to the second working position, and 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. The straight-through port of the first one-way throttle valve is connected to the inlet of the first return pipeline through the first reversing valve.

[0015] When the fluid pressure source outputs, the fluid control valve switches to the closed position;

[0016] When the fluid pressure source is cut off, the fluid control valve switches to the open position, and the outlet of the first energy storage device is connected to the closed port of the first actuator through the fluid control valve.

[0017] Secondly, this disclosure provides an automatic shutdown control device, comprising:

[0018] First actuator;

[0019] The first one-way throttle valve has its throttle port connected to the opening port of the first actuator.

[0020] The first pilot-operated one-way throttle valve includes a second one-way throttle valve and a first one-way valve. The inlet of the first one-way valve is connected to the throttle port of the second one-way throttle valve and the straight-through port of the first one-way throttle valve, respectively. The outlet of the first one-way valve is connected to the closing port of the first actuator.

[0021] The first reversing valve, 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;

[0022] A fluid pressure source, the outlet of which is connected to the first reversing valve;

[0023] The first return line is connected to the first directional valve at its inlet.

[0024] A delay structure is provided, which is connected to the first reversing valve; the outlet of the fluid pressure source is connected to the delay structure.

[0025] When energized, the first reversing valve switches to the first working position, the outlet of the fluid pressure source is connected to the straight-through port of the first one-way throttle valve through the first reversing valve, and the straight-through port of the second one-way throttle valve is connected to the inlet of the first return pipeline through the first reversing valve.

[0026] 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. The straight-through port of the first one-way throttle valve is connected to the inlet of the first return pipeline through the first reversing valve.

[0027] Thirdly, this disclosure provides a radiation source system, including a radiation device and the aforementioned automatic shutdown control device;

[0028] The radiation device is used to turn the radiation source on or off;

[0029] The first actuator is connected to the radiation device and is used to turn the radiation device on and off.

[0030] The beneficial effects of this disclosure include, for example:

[0031] This disclosure provides an automatic shutdown control device. When powered on, the first directional valve switches to the first operating position, connecting the outlet of the fluid pressure source to the through-port of the first one-way throttle valve via the first directional valve. The through-port of the second one-way throttle valve is connected to the inlet of the first return pipeline via the first directional valve. When powered off, the first directional valve switches to the second operating position, connecting the outlet of the fluid pressure source to the through-port of the second one-way throttle valve via the first directional valve. The through-port of the first one-way throttle valve is connected to the inlet of the first return pipeline via the first directional valve. When the fluid pressure source is outputting, the fluid control valve switches to the closed position. When the fluid pressure source is disconnected, the fluid control valve switches to the open position, connecting the outlet of the first accumulator to the closed port of the first actuator via the fluid control valve. This configuration allows the first actuator to automatically shut down in the event of a power outage and / or flow interruption, eliminating the need for manual operation, improving the automation level of the equipment, ensuring structural reliability, and reducing the risks associated with manual operation.

[0032] This disclosure provides a radioactive source system, including a radioactive device and the aforementioned automatic shutdown control device. The radioactive device is used to turn the radioactive source on or off. A first actuator is connected to the radioactive device and is used to perform the turning on and off of the radioactive device. In the event of a power outage and / or current interruption, the first actuator can automatically shut down the radioactive source without manual operation. This design is reliable, reduces the risk of radiation exposure when manually operating the source, and provides higher safety. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of the automatic shutdown control device provided in the first embodiment of this disclosure, which is normally turned on when powered and ventilated.

[0035] Figure 2 This is a schematic diagram of the automatic shutdown control device provided in the first embodiment of the present disclosure, which shuts off when powered on and ventilated.

[0036] Figure 3 A schematic diagram of the automatic shutdown control device provided in the first embodiment of this disclosure, which suddenly shuts off when the power and air supply are in operation;

[0037] Figure 4 A schematic diagram of the automatic shutdown control device provided in the first embodiment of this disclosure, which shuts off suddenly when power and gas are cut off while the device is powered on and gas is supplied.

[0038] Figure 5 A schematic diagram of the structure of the automatic shutdown control device provided in the second embodiment of this disclosure, which is normally turned on when powered and ventilated.

[0039] Figure 6 A schematic diagram of the automatic shutdown control device provided in the second embodiment of this disclosure, which shuts off when powered on and ventilated;

[0040] Figure 7 A schematic diagram of the automatic shutdown control device provided in the second embodiment of this disclosure, which suddenly shuts off when the power and air supply are on.

[0041] Figure 8 A schematic diagram of the automatic shutdown control device provided in the second embodiment of this disclosure, which shuts off suddenly when power and gas are cut off while the device is powered on and gas is supplied.

[0042] Figure 9 A schematic diagram of the structure of the automatic shutdown control device provided in the third embodiment of this disclosure, which is normally turned on when powered and ventilated.

[0043] Figure 10 A schematic diagram of the automatic shutdown control device provided in the third embodiment of this disclosure, which shuts off when powered on and ventilated;

[0044] Figure 11 A schematic diagram of the automatic shutdown control device provided in the third embodiment of this disclosure, which suddenly shuts off when the power and air supply are in operation;

[0045] Figure 12 A schematic diagram of the automatic shutdown control device provided in the third embodiment of this disclosure, which shuts off suddenly when power and gas are cut off while the device is powered on and gas is supplied.

[0046] Figure 13 A schematic diagram of the structure of the automatic shutdown control device provided in the fourth embodiment of this disclosure, which opens the radiation source in a powered and ventilated state;

[0047] Figure 14 This is a schematic diagram of the automatic shutdown control device provided in the fourth embodiment of the present disclosure, which shuts down suddenly when the device is powered on and ventilated.

[0048] Icons: 1-Fluid pressure source; 2-Second directional 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-operated 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 position Open position; 110-First directional valve; 11-First pilot-operated one-way throttle valve; 111-First check 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 silencer; 17-Second silencer; A1-Upward port; A2-Downward port; B1-Open port; B2-Closed port. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of this disclosure, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0053] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0054] It should be noted that, where there is no conflict, the features in the embodiments of this disclosure can be combined with each other.

[0055] This embodiment provides an automatic shutdown control device that can automatically shut down in the event of power failure, current interruption, or both, without requiring manual operation. It features a high degree of automation, reliable structure, and high safety.

[0056] First Embodiment

[0057] Please combine 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 directional valve 110, a fluid pressure source 1, a first return pipeline, a fluid control valve 10, and a first accumulator 13. The throttling port of the first one-way throttle valve 6 is connected to the opening 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 throttling port of the second one-way throttle valve 112 and the straight-through port of the first one-way throttle valve 6, respectively. The outlet of the first one-way valve 111 is connected to the closing port B2 of the first actuator 15. The straight-through port of the first one-way throttle valve 6 is connected to the first directional valve 110, and the straight-through port of the second one-way throttle valve 112 is connected to the first directional valve 110. The outlet of the fluid pressure source 1 is connected to the first directional valve 110. The inlet of the first return line is connected to the first directional 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.

[0058] When energized, the first directional valve 110 switches to the first operating 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 directional 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 directional valve 110. It can be understood that the fluid from the fluid pressure source 1, after passing through the first operating position 122 of the first directional valve 110, splits into two paths. One part of the fluid reaches the opening port B1 of the first actuator 15 through the first one-way throttle valve 6, and the first actuator 15 performs an opening action. The other part of the fluid reaches the inlet of the first one-way valve 111, keeping the first one-way valve 111 open. The fluid at the closing port B2 of the first actuator 15 returns through the first pilot-operated one-way throttle valve 11, the first directional valve 110, and the first return pipeline.

[0059] When power is off, the first directional valve 110 switches to the second operating 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 directional valve 110. The fluid enters the closed port B2 of the first actuator 15 through the first pilot-operated one-way throttle valve 11, and the first actuator 15 performs a closing action. 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 directional valve 110. The fluid at the open port B1 of the first actuator 15 returns through the first one-way throttle valve 6, the first directional valve 110, and the first return pipeline.

[0060] When fluid pressure source 1 is outputting, fluid control valve 10 switches to the closed position 101. When fluid pressure source 1 is disconnected, fluid control valve 10 switches to the open position 102, and the outlet of the first accumulator 13 is connected to the closed port B2 of the first actuator 15 through fluid control valve 10, thereby closing the first actuator 15.

[0061] The fluid provided by fluid pressure source 1 can be gas or liquid, without specific limitation. This embodiment uses a gaseous medium as an example. It can be understood that the first actuator 15 can be a cylinder or other driving component. The first pilot-operated one-way throttle valve 11, when open, has a stabilizing and venting function, making the cylinder movement smoother. The first one-way throttle valve 6, when closed, has a stabilizing and venting function, making the cylinder movement smoother.

[0062] Optionally, the automatic shutdown control device also includes a second check valve 8. The inlet of the second check valve 8 is connected to the outlet of the fluid pressure source 1, and the outlet of the second check valve 8 is connected to the first accumulator 13. The second check valve 8 can prevent the fluid in the first accumulator 13 from flowing back to the fluid pressure source 1, which is beneficial to the pressure maintenance of the first accumulator 13.

[0063] Optionally, the automatic shutdown control device also includes a solenoid valve 3, which is connected to the outlet of the fluid pressure source 1. When energized, the solenoid valve 3 switches to the third operating 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. The fluid from the fluid pressure source 1 flows to the first energy storage device 13, which stores energy for later use.

[0064] 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 directional valve 110 through the solenoid valve 3, so that the first directional valve 110 switches to the second working position 123, and the first actuator 15 performs the closing action.

[0065] Optionally, the automatic shutdown control device also includes a control valve 20. The control valve 20 can be a check valve, with its inlet connected to the fluid control valve 10 and its outlet connected to the closing port B2 of the first actuator 15. Alternatively, the control valve 20 can also be a one-way throttle valve, with its throttle port connected to the fluid control valve 10 and its through port connected to the closing port B2 of the first actuator 15. When the fluid pressure source 1 is disconnected, the fluid from the first accumulator 13 enters the closing port B2 of the first actuator 15 via the fluid control valve 10 and the control valve 20, thus closing the first actuator 15.

[0066] Optionally, the fluid pressure source 1 includes a gas supply triplet, comprising an air filter, a pressure reducing valve, and an oil mist lubricator. The function of the gas supply triplet is to ensure that the gas at the outlet of the fluid pressure source 1 is purified, filtered, and reduced to a preset pressure, thus ensuring that the working gas in the system is clean and has stable pressure. Silencers are respectively installed on the first and second return lines to reduce the noise generated by the automatic shutdown control device during operation.

[0067] Optionally, the solenoid valve 3 and the second directional valve 2 are each two-position five-way solenoid valves, the first directional valve 110 is a two-position five-way solenoid valve, and the fluid control valve 10 is a two-position three-way pneumatic control valve.

[0068] The automatic shutdown control device provided in this embodiment operates on the following principles under various working conditions:

[0069] Combination Figure 1 The principle behind the activation of the first actuator 15 under normal power and air supply conditions is as follows:

[0070] Under normal power and air supply conditions, the solenoid valve 3 is energized and switches to the third working position 31. The gas from the fluid pressure source 1 flows from branch b through the solenoid valve 3 and the second one-way valve 8 into the first energy storage device 13, and the first energy storage device 13 completes the charging process.

[0071] Simultaneously, the first directional valve 110 is energized and resets to the first working position 122. Gas from fluid pressure source 1 enters the opening port B1 of the first actuator 15 from branch d through the first directional valve 110 and the first one-way throttle valve 6, thus opening the first actuator 15. Gas from the closing port B2 of the first actuator 15 is discharged through the first pilot-operated one-way throttle valve 11, the first directional valve 110, the first return pipeline, and the first silencer 16.

[0072] Combination Figure 2 The principle behind the normal shutdown of the first actuator 15 under normal power and air supply conditions:

[0073] When solenoid valve 3 is de-energized, it switches to the fourth operating position 32, which is closed. When the first directional valve 110 is de-energized, it resets to the second operating position 123. Gas from fluid pressure source 1 enters the closed port B2 of the first actuator 15 from branch d through the first directional valve 110 and the first pilot-operated one-way throttle valve 11, thus 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 directional valve 110, the first return line, and the second silencer 17.

[0074] It should be noted that in the event of a sudden power outage while the device is normally powered and ventilated, the closing principle of the first actuator 15 is the same as the normal closing principle when the first actuator 15 is powered and ventilated. Figure 2 The working status shown.

[0075] Combination Figure 3 The principle behind the shutdown of the first actuator 15 in the event of a sudden gas outage under normal power and air supply conditions:

[0076] When energized, solenoid valve 3 and first directional valve 110 are energized, solenoid valve 3 is in the third working position 31, and first directional valve 110 is in the first working position 122.

[0077] In the event of a sudden gas outage, meaning there is no gas supply at the outlet of fluid pressure source 1, and no gas supply in branches d, b, and c, branch c suddenly disconnects. The control port of fluid control valve 10 experiences no pressure, and fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 releases gas. The gas in the first accumulator 13, after passing through fluid control valve 10, enters the closed port B2 of the first actuator 15 via control valve 20, causing the first actuator 15 to close. At this time, the first pilot-operated one-way throttle valve 11 is closed and there is no gas leakage. The gas from the open port B1 of the first actuator 15 sequentially passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d back to the main gas path.

[0078] It can be understood that the main gas path here refers to the pipeline connected to the outlet of fluid pressure source 1, and the main gas path has three branches: d, b, and c.

[0079] Combination Figure 4 The principle behind the shutdown of the first actuator 15 in the event of a sudden power or gas outage under normal power and gas supply conditions:

[0080] In the event of a sudden power outage, solenoid valve 3 and the first directional valve 110 lose power. Solenoid valve 3 is in the fourth working position 32, and the first directional valve 110 is in the second working position 123.

[0081] Branch c suddenly disconnects, and the control port of fluid control valve 10 has no pressure. Fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 releases gas. The gas in the first accumulator 13 passes through fluid control valve 10 and then through control valve 20 to the closed port B2 of the first actuator 15, and the first actuator 15 closes. At this time, the first pilot-operated one-way throttle valve 11 is in the closed state and there is no gas leakage. The gas in the open port B1 of the first actuator 15 passes through the first one-way throttle valve 6, the first reversing valve 110, the first return pipeline, and the second silencer 17 in sequence before being discharged.

[0082] Second Embodiment

[0083] Optionally, combined 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 pipeline. The control valve 20 includes a fourth one-way 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 straight-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 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. The inlet of the second return pipeline is connected to the second reversing valve 2. The inlet of the fourth check valve 9 is connected to the fluid control valve 10, and the outlet of the fourth check valve 9 is connected to the downcomer port A2. The throttling port of the fifth check valve 7 is connected to the fluid control valve 10, and the straight-through port of the fifth check valve 7 is connected to the shut-off port B2.

[0084] When energized, the second directional valve 2 switches to the fifth operating 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 directional 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 directional valve 2. It can be understood that the fluid from the fluid pressure source 1 splits into two paths after passing through the fifth operating position 21 of the second directional valve 2. One part of the fluid reaches the rising port A1 of the second actuator 14 through the third one-way throttle valve 4, and the second actuator 14 performs a rising action. The other part of the fluid reaches the inlet of the third one-way valve 51, keeping the third one-way valve 51 open. The fluid from the falling port A2 of the second actuator 14 returns through the second pilot-operated one-way throttle valve 5, the second directional valve 2, and the second return pipeline.

[0085] When power is off, the second directional valve 2 switches to the sixth operating 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 directional valve 2. The fluid enters the descending port A2 of the second actuator 14 through the second pilot-operated one-way throttle valve 5, and the second actuator 14 performs a descending action. 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 directional valve 2. The fluid at the ascending port A1 of the second actuator 14 returns through the third one-way throttle valve 4, the second directional valve 2, and the second return pipeline.

[0086] When fluid pressure source 1 is outputting, fluid control valve 10 switches to the closed position 101. When fluid pressure source 1 is disconnected, fluid control valve 10 switches to the open position 102. The outlet of the first accumulator 13 is connected to the closed port B2 of the first actuator 15 via 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 via fluid control valve 10 and the fourth one-way valve 9, thereby lowering the second actuator 14.

[0087] 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 divided into two paths. One path reaches the closed port B2 of the first actuator 15 via the fifth one-way throttle valve 7. The other path reaches the descending port A2 of the second actuator 14 via the fourth one-way valve 9. Since the flow is direct through the fourth one-way valve 9, the fluid takes less time to reach the descending port A2 of the second actuator 14. However, when the fluid enters through the throttle orifice of the fifth one-way throttle valve 7, the fluid takes longer to reach the closed port B2 of the first actuator 15. This creates a time difference between the actions 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. The delay time is approximately 1 to 15 seconds, preferably 5 to 10 seconds, and can be adjusted flexibly according to actual conditions.

[0088] It should be noted that in this embodiment, the second actuator 14 descends first, and then the first actuator 15 closes. Therefore, a fourth one-way valve 9 and a fifth one-way throttle valve 7 are used to achieve the delayed action of the first actuator 15. Optionally, the first actuator 15 is a rotary cylinder, and the second actuator 14 is a lifting cylinder. The first actuator 15 and the second actuator 14 communicate with each other to open and close the radiation device, thereby opening and closing the radiation source.

[0089] 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, with the inlet of the one-way valve connected to the fluid control valve 10 and the outlet of the one-way valve connected to the closing port B2 of the first actuator 15.

[0090] The automatic shutdown control device provided in this embodiment operates on the following principles under various working conditions:

[0091] Combination Figure 5 The working principle of turning on a radiation source under normal power and ventilation conditions:

[0092] Under normal power and air supply conditions, the solenoid valve 3 is energized and switches to the third working position 31. The gas from the fluid pressure source 1 flows from branch b through the solenoid valve 3 and the second one-way valve 8 into the first energy storage device 13, and the first energy storage device 13 completes the charging process.

[0093] When the first directional valve 110 is energized, it switches to the first operating position 122. Gas from fluid pressure source 1 enters the opening port B1 of the first actuator 15 from branch d through the first directional valve 110 and the first one-way throttle valve 6, thus opening the first actuator 15. Gas from the closing port B2 of the first actuator 15 is discharged through the first pilot-operated one-way throttle valve 11, the first directional valve 110, the first return pipeline, and the first silencer 16.

[0094] After the first actuator 15 is activated, at a preset interval, the second directional valve 2 is energized, switching to the fifth operating position 21. Gas from the fluid pressure source 1 enters the rising port A1 of the second actuator 14 from branch a via the second directional valve 2 and the third one-way throttle valve 4, causing the second actuator 14 to rise. Gas from the falling port A2 of the second actuator 14 is discharged via the second pilot-operated one-way throttle valve 5, the second directional valve 2, the second return pipeline, and the first silencer 16. The radiation device activates the radiation source.

[0095] Combination Figure 6 The working principle of shutting off the radiation source normally or in the event of a sudden power outage, under normal power and ventilation conditions:

[0096] When the second directional valve 2 is de-energized, it switches to the sixth operating position 22. Gas from fluid pressure source 1 enters the descending port A2 of the second actuator 14 from branch a via the second directional valve 2 and the second pilot-operated one-way throttle valve 5, causing the second actuator 14 to descend. Gas from the rising port A1 of the second actuator 14 is discharged via the third one-way throttle valve 4, the second directional valve 2, the second return pipeline, and the second silencer 17.

[0097] When solenoid valve 3 is de-energized, it switches to the fourth working position 32 and is in the closed state.

[0098] The first directional valve 110 is de-energized and switches to the second operating position 123. Gas from fluid pressure source 1 enters the closed port B2 of the first actuator 15 from branch d via the first directional valve 110 and the first pilot-operated one-way throttle valve 11, thus closing the first actuator 15. Gas from the open port B1 of the first actuator 15 is discharged via the first one-way throttle valve 6, the first directional valve 110, the first return line, and the second silencer 17. The radiation source is shut off by the radiation device.

[0099] Combination Figure 7 The working principle of the automatic shutdown of the radiation source in the event of a sudden gas outage while the power and gas supply are in operation:

[0100] When energized, the first directional valve 110 is energized and located in the first working position 122, and the second directional valve 2 is energized and located in the fifth working position 21.

[0101] In the event of a sudden gas outage, branch c is abruptly disconnected, and the control port of fluid control valve 10 experiences no pressure. Fluid control valve 10 then switches from the closed position 101 to the open position 102. The first accumulator 13 releases gas, and the gas in the first accumulator 13, after passing through fluid control valve 10, is divided into two paths:

[0102] One path enters the lowering port A2 of the second actuator 14 via the fourth one-way valve 9, causing the second actuator 14 to descend. At this time, the second pilot-operated one-way throttle valve 5 is in the closed state, preventing air leakage. The gas from the rising port A1 of the second actuator 14 returns to the main gas path via the third one-way throttle valve 4, the second reversing valve 2, and branch a.

[0103] Another path leads to the closed port B2 of the first actuator 15 via the fifth one-way throttle valve 7, closing the first actuator 15. At this time, the first pilot-operated one-way throttle valve 11 is closed, preventing gas leakage. The gas from the open port B1 of the first actuator 15 sequentially passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d back to the main gas path. The radiation source is shut off by the radiation device.

[0104] Because the flow is direct through the fourth check valve 9, the gas from the first accumulator 13 takes less time to reach the lowering port A2 of the second actuator 14; however, because the gas enters through the throttling orifice of the fifth check valve 7, the gas from the first accumulator 13 takes longer to reach the closing port B2 of the first actuator 15. This creates a time difference between the actions of the first actuator 15 and the second actuator 14, causing the second actuator 14 to descend first, followed by the first actuator 15 closing.

[0105] Furthermore, due to the check valve function of the first pilot-operated one-way throttle valve 11 and the second pilot-operated one-way throttle valve 5, gas is prevented from reaching the main gas path and silencer through the first pilot-operated one-way throttle valve 11 and the second pilot-operated one-way throttle valve 5, thus preventing gas leakage. The second one-way valve 8 also prevents gas backflow in the first accumulator 13. The first pilot-operated one-way throttle valve 11, the second pilot-operated one-way throttle valve 5, and the second one-way valve 8 maintain pressure in the gas-off state. Therefore, the first accumulator 13 only requires a small gas storage tank of less than 200ml to operate, resulting in a reliable structure, small size, and low cost.

[0106] Combination Figure 8 The working principle of the automatic shutdown of the radiation source in the event of a sudden power or gas outage while the power and gas supply are in operation:

[0107] In the event of a sudden power outage, the first directional valve 110, solenoid valve 3, and second directional valve 2 lose power. Solenoid valve 3 is in the fourth working position 32, the first directional valve 110 is in the second working position 123, and the second directional valve 2 is in the sixth working position 22.

[0108] In the event of a sudden gas outage, branch c is abruptly disconnected, and the control port of fluid control valve 10 experiences no pressure. Fluid control valve 10 then switches from the closed position 101 to the open position 102. The first accumulator 13 releases gas, and the gas in the first accumulator 13, after passing through fluid control valve 10, is divided into two paths:

[0109] One path enters the lowering port A2 of the second actuator 14 via the fourth one-way valve 9, causing the second actuator 14 to descend. At this time, the second pilot-operated one-way throttle valve 5 is in the closed state, preventing air leakage. The gas from the rising port A1 of the second actuator 14 returns to the main gas path via the third one-way throttle valve 4, the second reversing valve 2, and branch a.

[0110] Another path leads to the closed port B2 of the first actuator 15 via the fifth one-way throttle valve 7, closing the first actuator 15. At this time, the first pilot-operated one-way throttle valve 11 is closed, preventing gas leakage. The gas from the open port B1 of the first actuator 15 sequentially passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d back to the main gas path. The radiation source is shut off by the radiation device.

[0111] Other parts not mentioned in this embodiment are similar to those described in the first embodiment and will not be repeated here.

[0112] Third Embodiment

[0113] Optionally, combined Figure 9 Based on the second embodiment, the automatic shutdown control device further includes a delay structure. The delay structure is connected to the solenoid valve 3 and the first directional valve 110, respectively. The first directional valve 110 is a pneumatically controlled valve, and the delay structure and the first directional valve 110 together form a pneumatically controlled delay valve.

[0114] When energized, 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 to replenish fluid to the first energy storage device 13 and maintain the pressure of the first energy storage device 13.

[0115] When power is off, solenoid valve 3 switches to the fourth operating position 32. The outlet of fluid pressure source 1 is connected to the first directional valve 110 through solenoid valve 3 and the delay structure, so that the first directional valve 110 switches to the second operating position 123. Because the fluid passes through the delay structure, the first directional valve 110 switches to the second operating position 123 with a delay. In this way, an operation time is reserved for the second actuator 14 to descend, which can ensure that the first actuator 15 closes after the second actuator 14 descends.

[0116] Optionally, the delay structure includes a sixth one-way throttle valve 121 and / or a second energy storage device 125. That is, the delay structure may only include the sixth one-way throttle valve 121, with its straight-through port connected to the first directional valve 110 and its throttling port connected to the solenoid valve 3. Alternatively, it may only include the second energy storage device 125, with its inlet connected to the solenoid valve 3 and its outlet connected to the first directional valve 110.

[0117] In this embodiment, the delay structure includes a sixth one-way throttle valve 121 and a second energy storage device 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 energy storage device 125, and the outlet of the second energy storage device 125 is connected to the first directional valve 110. When the power is off, the fluid from the fluid pressure source 1 passes through the solenoid valve 3, the sixth one-way throttle valve 121, and the second energy storage device 125 in sequence to reach the first directional valve 110, causing the first directional valve 110 to switch to the second operating position 123. The fluid from the fluid pressure source 1 enters the closing port B2 of the first actuator 15 through the second operating position 123 of the first directional valve 110 and the first pilot-operated one-way throttle valve 11, and the first actuator 15 performs a closing action.

[0118] It is easy to understand that, in the event of a power outage, the gas from fluid pressure source 1 first pressurizes the second accumulator 125 to a preset pressure, such as 0.2 MPa, over a period of time. The speed of this pressurization process can be adjusted using the sixth one-way throttle valve 121. The maximum pressurization time is 15 seconds, but it can also be flexibly set according to actual conditions, achieving a delay of 1 to 15 seconds, preferably 5 to 10 seconds. Only after the second accumulator 125 is pressurized to the preset pressure will the gas act on the first reversing valve 110, causing the first reversing valve 110 to switch from the first operating position 122 to the second operating position 123, achieving a delayed switching effect, thereby delaying the closing of the first actuator 15.

[0119] 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 the radiation source system, with the first actuator 15 and the second actuator 14 respectively connected to the radiation device. The radiation device is used to turn the radiation source on or off.

[0120] When the radiation source needs to be activated, the first actuator 15 first rotates the radiation device to open it, and then the second actuator 14 drives the radiation device to rise. After the radiation device rotates to open, it rises again after a preset time interval. The preset time is 1 to 15 seconds, and can be flexibly set according to actual needs.

[0121] When the radiation source needs to be shut down, the second actuator 14 first lowers the radiation device, and then the first actuator 15 rotates the radiation device to close it. After the radiation device lowers, it rotates to close after a preset time interval. The preset time is 1 to 15 seconds and can be flexibly set according to actual needs.

[0122] The automatic shutdown control device provided in this embodiment operates on the following principles under various working conditions:

[0123] Combination Figure 9 The working principle of the radiation device when it is powered and ventilated:

[0124] Under normal power and air supply 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 the second one-way valve 8 into the first accumulator 13, completing the charging of the first accumulator 13. At this time, solenoid valve 3 and the delay structure are not conducting, and there is no pressure at the pneumatic control end of the first reversing valve 110. The first reversing valve 110 resets to the first working position 122. Gas from fluid pressure source 1 flows from branch d through the first reversing valve 110 and the first one-way throttle valve 6 into the opening port B1 of the first actuator 15, opening the first actuator 15. Gas from the closing port B2 of the first actuator 15 is discharged through the first pilot-operated one-way throttle valve 11, the first reversing valve 110, the first return pipeline, and the first silencer 16.

[0125] After the first actuator 15 is activated, at a preset interval, the second directional valve 2 is energized, switching to the fifth operating position 21. Gas from the fluid pressure source 1 enters the rising port A1 of the second actuator 14 from branch a via the second directional valve 2 and the third one-way throttle valve 4, causing the second actuator 14 to rise. Gas from the falling port A2 of the second actuator 14 is discharged via the second pilot-operated one-way throttle valve 5, the second directional valve 2, the second return pipeline, and the first silencer 16. The radiation device activates the radiation source.

[0126] Combination Figure 10 The working principle of controlling the shutdown of radiation devices under normal power and ventilation conditions:

[0127] When the second directional control valve 2 is de-energized, it switches to the sixth operating position 22. Gas from fluid pressure source 1 enters the lowering port A2 of the second actuator 14 from branch a via the second directional control valve 2 and the second pilot-operated one-way throttle valve 5, causing the second actuator 14 to descend. Gas from the rising port A1 of the second actuator 14 is discharged via the third one-way throttle valve 4, the second directional control valve 2, the second return pipeline, and the second silencer 17.

[0128] After the second actuator 14 descends, the control solenoid valve 3 is de-energized, and the solenoid valve 3 switches to the fourth working position 32. The gas from the fluid pressure source 1 passes through the solenoid valve 3 and the delay structure sequentially from branch b. After the delay structure is fully charged, it reaches the first directional valve 110, causing the first directional valve 110 to delay for a period of time after the solenoid valve 3 is de-energized before switching to the second working position 123. The gas from the fluid pressure source 1 passes through the first directional valve 110 and the first pilot-operated one-way throttle valve 11 from branch d into the closed port B2 of the first actuator 15, and the first actuator 15 closes. The gas from the open port B1 of the first actuator 15 is discharged through the first one-way throttle valve 6, the first directional valve 110, the first return pipeline, and the second silencer 17. The radiation device shuts off the radiation source.

[0129] 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-operated one-way throttle valve 11 from branch d. One path enters the closed port B2 of the first actuator 15, and the other path is blocked by the closed position 101 of the fluid control valve 10 through the fifth one-way throttle valve 7, and blocked by the inlet air path of the second pilot-operated one-way throttle valve 5 through the fifth one-way throttle valve 7 and the fourth one-way valve 9 to prevent air leakage.

[0130] Combination Figure 10 The working principle of the automatic shutdown of the radiation source in the event of a sudden power outage while the power and ventilation are in operation:

[0131] This condition is similar to the second working condition mentioned above.

[0132] In the event of a sudden power outage, solenoid valve 3 and the second directional valve 2 lose power simultaneously. Solenoid valve 3 switches to the fourth working position 32, while the second directional valve 2 switches to the sixth working position 22.

[0133] The second directional valve 2 switches to the sixth working position 22. Gas from fluid pressure source 1 enters the descending port A2 of the second actuator 14 from branch a via the second directional valve 2 and the second pilot-operated one-way throttle valve 5, causing the second actuator 14 to descend. Gas from the rising port A1 of the second actuator 14 is discharged via the third one-way throttle valve 4, the second directional valve 2, the second return pipeline, and the second silencer 17.

[0134] Solenoid valve 3 switches to the fourth operating position 32. Gas from fluid pressure source 1 flows from branch b through solenoid valve 3, the delay structure, and the first directional valve 110. The pneumatic control end of the first directional valve 110 is pressurized, and the first directional valve 110 switches to the second operating position 123. Gas from fluid pressure source 1 flows from branch d through the first directional valve 110 and the first pilot-operated one-way throttle valve 11 into the closed port B2 of the first actuator 15, and the first actuator 15 closes. Gas from the open port B1 of the first actuator 15 is discharged through the first one-way throttle valve 6, the first directional valve 110, the first return line, and the second silencer 17. The radiation device shuts off the radiation source.

[0135] It is understandable that when solenoid valve 3 and the second directional valve 2 are simultaneously de-energized, the second directional valve 2 immediately switches to the sixth operating position 22, and the second actuator 14 immediately descends. Because the first directional valve 110 is connected to a delay structure, after the solenoid valve 3 is de-energized, the first directional valve 110 does not immediately switch direction. Instead, it waits until the second accumulator 125 in the delay structure is fully charged before switching to the second operating position 123, and then the first actuator 15 closes. This time difference between the actions of the first actuator 15 and the second actuator 14 ensures that the first actuator 15 closes only after the second actuator 14 has descended, thus shutting off the radiation source.

[0136] In this state, 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-operated one-way throttle valve 11 from branch d. One path enters the closed port B2 of the first actuator 15, and the other path is blocked by the closed position 101 of the fluid control valve 10 through the fifth one-way throttle valve 7 and by the air inlet path of the second pilot-operated one-way throttle valve 5, so no gas leakage will occur.

[0137] Combination Figure 11 The working principle of the automatic shutdown of the radiation source in the event of a sudden gas outage while the power and gas supply are in operation:

[0138] When energized, solenoid valve 3 and second directional valve 2 are energized, solenoid valve 3 is in the third working position 31, and second directional valve 2 is in the fifth working position 21.

[0139] In the event of a sudden gas outage, meaning there is no gas supply at the outlet of fluid pressure source 1, and no gas supply in branches a, b, c, and d, branch c suddenly disconnects. The control port of fluid control valve 10 experiences no pressure, and fluid control valve 10 switches from the closed position 101 to the open position 102. The first accumulator 13 releases gas, and the gas in the first accumulator 13, after passing through fluid control valve 10, is divided into two paths:

[0140] One path enters the lowering port A2 of the second actuator 14 via the fourth one-way valve 9, causing the second actuator 14 to descend. At this time, the second pilot-operated one-way throttle valve 5 is in the closed state, preventing air leakage. The gas from the rising port A1 of the second actuator 14 returns to the main gas path via the third one-way throttle valve 4, the second reversing valve 2, and branch a.

[0141] Another path leads to the closed port B2 of the first actuator 15 via the fifth one-way throttle valve 7, closing the first actuator 15. At this time, the first pilot-operated one-way throttle valve 11 is closed, preventing gas leakage. The gas from the open port B1 of the first actuator 15 sequentially passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d back to the main gas path. The radiation source is shut off by the radiation device.

[0142] It can be understood that the main gas path here refers to the pipeline connected to the outlet of fluid pressure source 1, and there are four branches a, b, c and d on the main gas path.

[0143] Because the flow is direct through the fourth check valve 9, the gas from the first accumulator 13 takes less time to reach the lowering port A2 of the second actuator 14; however, because the gas enters through the throttling orifice of the fifth check valve 7, the gas from the first accumulator 13 takes longer to reach the closing port B2 of the first actuator 15. This creates a time difference between the actions of the first actuator 15 and the second actuator 14, causing the second actuator 14 to descend first, followed by the first actuator 15 closing.

[0144] Furthermore, due to the check valve function of the first pilot-operated one-way throttle valve 11 and the second pilot-operated one-way throttle valve 5, gas is prevented from reaching the main gas path and silencer through the first pilot-operated one-way throttle valve 11 and the second pilot-operated one-way throttle valve 5, thus preventing gas leakage. The second one-way valve 8 also prevents gas backflow in the first accumulator 13. The first pilot-operated one-way throttle valve 11, the second pilot-operated one-way throttle valve 5, and the second one-way valve 8 maintain pressure in the gas-off state. Therefore, the first accumulator 13 only requires a small gas storage tank of less than 200ml to operate, resulting in a reliable structure, small size, and low cost.

[0145] Combination Figure 12 The working principle of the automatic shutdown of the radiation source in the event of a sudden power or gas outage while the power and gas supply are in operation:

[0146] In the event of a sudden power outage, solenoid valve 3 and the second directional valve 2 lose power. Solenoid valve 3 is in the fourth working position 32, and the second directional valve 2 is in the sixth working position 22.

[0147] In the event of a sudden gas outage, branch c is abruptly disconnected, and the control port of fluid control valve 10 experiences no pressure. Fluid control valve 10 then switches from the closed position 101 to the open position 102. The first accumulator 13 releases gas, and the gas in the first accumulator 13, after passing through fluid control valve 10, is divided into two paths:

[0148] One path enters the lowering port A2 of the second actuator 14 via the fourth one-way valve 9, causing the second actuator 14 to descend. At this time, the second pilot-operated one-way throttle valve 5 is in the closed state, preventing air leakage. The gas from the rising port A1 of the second actuator 14 passes sequentially through the third one-way throttle valve 4, the second reversing valve 2, and the second return pipeline, and is discharged from the second silencer 17.

[0149] Another path leads to the closed port B2 of the first actuator 15 via the fifth one-way throttle valve 7, closing the first actuator 15. At this time, the first pilot-operated one-way throttle valve 11 is closed, preventing gas leakage. The gas from the open port B1 of the first actuator 15 sequentially passes through the first one-way throttle valve 6, the first reversing valve 110, and branch d back to the main gas path. The radiation source is shut off by the radiation device.

[0150] Since the throttling port of the fifth one-way throttle valve 7 is connected to the fluid control valve 10, and 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 a straight-through valve, the gas is delayed in acting on the closing port B2 of the first actuator 15, which means that the second actuator 14 descends first, and then the first actuator 15 closes.

[0151] The automatic shutdown control device provided in this embodiment employs a delayed structure to achieve sequential operation of the first actuator 15 and the second actuator 14 under power failure conditions. Furthermore, by using a structure where the fifth one-way throttle valve 7 and the fourth one-way valve 9 are respectively connected to the first energy storage device 13, sequential operation of the first actuator 15 and the second actuator 14 is achieved under gas failure conditions; that is, the second actuator 14 descends first, and then the first actuator 15 closes, preventing collision interference caused by simultaneous operation of the two actuators.

[0152] Under normal power and air supply conditions, the fourth check valve 9 acts as an isolation device, ensuring that the operation of the first actuator 15 and the second actuator 14 does not affect each other.

[0153] This automatic shutdown control device can adapt to three abnormal situations simultaneously: sudden power outage, sudden gas outage, or sudden power and gas outage. In each abnormal situation, it can realize the shutdown and reset of the first actuator 15 and the second actuator 14. Furthermore, it does not interfere with the operation and reset of the first actuator 15 and the second actuator 14 under normal conditions.

[0154] Other parts not mentioned in this embodiment are similar to those described in the first and second embodiments, and will not be repeated here.

[0155] Fourth embodiment

[0156] Combination Figure 13 This disclosure also provides an automatic shutdown control device suitable for automatic shutdown in the event of a power outage. 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 directional valve 110, a fluid pressure source 1, a first return pipeline, and a delay structure. The throttling port of the first one-way throttle valve 6 is connected to the opening 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 throttling port of the second one-way throttle valve 112 and the straight-through port of the first one-way throttle valve 6, respectively. The outlet of the first one-way valve 111 is connected to the closing port B2 of the first actuator 15. The straight-through port of the first one-way throttle valve 6 is connected to the first directional valve 110, and the straight-through port of the second one-way throttle valve 112 is connected to the first directional valve 110. The outlet of fluid pressure source 1 is connected to the first directional valve 110. The inlet of the first return line is connected to the first directional valve 110. The delay structure is connected to the first directional valve 110, and the outlet of fluid pressure source 1 is connected to the delay structure.

[0157] When energized, the first directional 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 directional 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 directional valve 110. The first actuator 15 is activated.

[0158] When power is off, the outlet of fluid pressure source 1 is connected to the delay structure, causing the first directional valve 110 to switch to the second operating position 123. The outlet of fluid pressure source 1 is connected to the straight-through port of the second one-way throttle valve 112 through the first directional 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 directional valve 110. The first actuator 15 closes after a delay.

[0159] Optionally, the automatic shutdown control device also includes a solenoid valve 3, with the outlet of the fluid pressure source 1 connected to the solenoid valve 3. When energized, the solenoid valve 3 switches to the third operating position 31, and the solenoid valve 3 is not connected to the delay structure. When de-energized, the solenoid valve 3 switches to the fourth operating position 32, and the outlet of the fluid pressure source 1 is connected to the first directional valve 110 through the solenoid valve 3 and the delay structure, so that the first directional valve 110 switches to the second operating position 123 after a delay when de-energized, and the first actuator 15 closes. That is, after de-energization, the first actuator 15 does not close immediately, but closes after a delay.

[0160] Optionally, the delay structure includes at least one of a sixth one-way throttle valve 121 and a second energy storage device 125. In this embodiment, the delay structure includes a sixth one-way throttle valve 121 and a second energy storage device 125. The throttle port of the sixth one-way throttle valve 121 is connected to the solenoid valve 3, the straight-through port of the sixth one-way throttle valve 121 is connected to the inlet of the second energy storage device 125, and the outlet of the second energy storage device 125 is connected to the first reversing valve 110.

[0161] Optionally, 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 directional valve 2, and a second return line. The throttling 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 throttling port of the fourth one-way throttle valve 52 and the straight-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 straight-through port of the third one-way throttle valve 4 is connected to the second directional valve 2, and the straight-through port of the fourth one-way throttle valve 52 is connected to the second directional valve 2. The outlet of the fluid pressure source 1 is connected to the second directional valve 2. The inlet of the second return line is connected to the second directional valve 2.

[0162] When energized, the second directional 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 directional 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 directional valve 2. The second actuator 14 rises.

[0163] When the power is off, the second directional valve 2 switches to the sixth working position 22, the outlet of the fluid pressure source 1 is connected to the straight port of the fourth one-way throttle valve 52 through the second directional valve 2, and the straight port of the third one-way throttle valve 4 is connected to the inlet of the second return pipeline through the second directional valve 2; the second actuator 14 descends.

[0164] The outlet of fluid pressure source 1 is connected to the delay structure. The first directional valve 110 switches to the second working position 123. After the second actuator 14 descends, the first actuator 15 closes.

[0165] Compared to the third embodiment, this embodiment omits the first energy storage device 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 components not mentioned in this embodiment are similar to those described in the third embodiment and will not be repeated here.

[0166] The automatic shutdown control device provided in this embodiment operates on the following principles under various working conditions:

[0167] Combination Figure 13 The working principle of the radiation source when it is powered on and ventilated:

[0168] Under normal power and air supply conditions, solenoid valve 3 is energized and switches to the third working position 31. At this time, solenoid valve 3 and the delay structure are not conductive, and there is no pressure at the pneumatic control end of the first directional valve 110. The first directional valve 110 resets to the first working position 122. Gas from fluid pressure source 1 enters the opening port B1 of the first actuator 15 from branch d through the first directional valve 110 and the first one-way throttle valve 6, and the first actuator 15 opens. Gas from the closing port B2 of the first actuator 15 is discharged through the first pilot-operated one-way throttle valve 11, the first directional valve 110, the first return pipeline, and the first silencer 16.

[0169] After the first actuator 15 is activated, at a preset interval, the second directional valve 2 is energized, switching to the fifth operating position 21. Gas from the fluid pressure source 1 enters the rising port A1 of the second actuator 14 from branch a via the second directional valve 2 and the third one-way throttle valve 4, causing the second actuator 14 to rise. Gas from the falling port A2 of the second actuator 14 is discharged via the second pilot-operated one-way throttle valve 5, the second directional valve 2, the second return pipeline, and the first silencer 16. The radiation device activates the radiation source.

[0170] Combination Figure 14 The working principle of controlling the radiation device to shut down normally or shut down suddenly when power is cut off under normal power and ventilation conditions:

[0171] When the second directional valve 2 is de-energized, it switches to the sixth operating position 22. Gas from fluid pressure source 1 enters the descending port A2 of the second actuator 14 from branch a via the second directional valve 2 and the second pilot-operated one-way throttle valve 5, causing the second actuator 14 to descend. Gas from the rising port A1 of the second actuator 14 is discharged via the third one-way throttle valve 4, the second directional valve 2, the second return pipeline, and the second silencer 17.

[0172] When solenoid valve 3 is de-energized, it switches to the fourth operating position 32. Gas from fluid pressure source 1 flows from branch b through solenoid valve 3 and the delay structure. After the delay structure is fully charged, it reaches the first directional valve 110, causing the first directional valve 110 to delay for a period after solenoid valve 3 is de-energized before switching to the second operating position 123. Gas from fluid pressure source 1 flows from branch d through the first directional 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 directional valve 110, the first return line, and the second silencer 17. The radiation source is shut off by the radiation device.

[0173] 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-operated one-way throttle valve 11 from branch d. One path enters the closed port B2 of the first actuator 15, and the other path is blocked by the closed position 101 of the fluid control valve 10 through the fifth one-way throttle valve 7, and blocked by the inlet air path of the second pilot-operated one-way throttle valve 5 through the fifth one-way throttle valve 7 and the fourth one-way valve 9 to prevent air leakage.

[0174] In this embodiment, other parts not mentioned are similar to those described in the first, second, and third embodiments, and will not be repeated here.

[0175] This disclosure also provides a radioactive source system, including a radioactive device and the aforementioned automatic shutdown control device. The radioactive device is used to turn the radioactive source on or off. A first actuator 15 is connected to the radioactive device and is used to perform the turning on and off of the radioactive device. Applying the aforementioned automatic shutdown control device to a radioactive source system can realize the automatic shutdown of the radioactive device in the event of power failure, gas failure, or other power and gas outages, avoiding manual shutdown operations and eliminating the risk of radiation exposure to operators near the radioactive source, thus improving safety.

[0176] Optionally, the radiation source system includes a first actuator 15 and a second actuator 14, which are respectively connected to the radiation device. When the radiation device needs to be turned on, the first actuator 15 turns on first, and then the second actuator 14 rises. When the radiation device needs to be turned off, the second actuator 14 descends first, and then the first actuator 15 turns off.

[0177] Of course, in addition to being used in radiation source systems, this automatic shutdown control device can also be used in other automatic control fields. It is suitable for scenarios where one actuator operates or scenarios where two actuators operate sequentially, and its application scenarios are wide-ranging.

[0178] In summary, the automatic shutdown control device and radiation source system provided in this disclosure have the following beneficial effects, including:

[0179] The automatic shutdown control device provided in this embodiment 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. Furthermore, it does not interfere with the normal operation and reset of the first actuator 15 and the second actuator 14. The structure is simple and reliable, with low cost. In the event of a sudden abnormality, the first actuator 15 and the second actuator 14 can automatically shut down without manual operation, improving the automation level of the equipment and reducing the risks associated with manual operation.

[0180] This disclosure provides a radioactive source system including a radioactive device and the aforementioned automatic shutdown control device. The radioactive device is used to turn the radioactive source on or 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 radioactive source without manual operation. This system is reliable, reduces the risk of radiation exposure when manually operating the source, and provides higher safety.

[0181] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

[0182] Industrial applicability

[0183] This disclosure provides an automatic shutdown control device. When powered on, the first directional valve switches to the first operating position, and the outlet of the fluid pressure source is connected to the through-port of the first one-way throttle valve via the first directional valve. The through-port of the second one-way throttle valve is connected to the inlet of the first return pipeline via the first directional valve. When powered off, the first directional valve switches to the second operating position, and the outlet of the fluid pressure source is connected to the through-port of the second one-way throttle valve via the first directional valve. The through-port of the first one-way throttle valve is connected to the inlet of the first return pipeline via the first directional valve. When the fluid pressure source is outputting, the fluid control valve switches to the closed position. When the fluid pressure source is disconnected, the fluid control valve switches to the open position, and the outlet of the first accumulator is connected to the closed port of the first actuator via the fluid control valve. This configuration allows the first actuator to automatically shut down in the event of a power outage and / or flow interruption, eliminating the need for manual operation, improving the automation level of the equipment, ensuring structural reliability, and reducing the risks associated with manual operation.

[0184] Embodiments of this disclosure also provide a radioactive source system, including a radioactive device and the aforementioned automatic shutdown control device. The radioactive device is used to turn the radioactive source on or off. A first actuator is connected to the radioactive device and is used to perform the turning on and off of the radioactive device. In the event of a power outage and / or current interruption, the first actuator can automatically shut down the radioactive source without manual operation. This design is reliable, reduces the risk of radiation exposure when manually operating the source, and provides higher safety.

[0185] Furthermore, it is understood that the automatic shutdown control device and radiation source system provided in the embodiments of this 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 in the embodiments of this disclosure can be used in the field of automatic control technology.

Claims

1. An automatic shutdown control device, characterized in that, include: First actuator (15); The first one-way throttle valve (6) has its throttle port connected to the opening 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 straight-through port of the first one-way throttle valve (6), respectively. The outlet of the first one-way valve (111) is connected to the shut-off port (B2) of the first actuator (15). The first reversing valve (110) has a through port of the first one-way throttle valve (6) 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). A fluid pressure source (1) is provided, the outlet of which is connected to the first directional valve (110). The first return line is connected to the first directional valve (110) at its inlet. A fluid control valve (10) is provided, with the shut-off port (B2) of the first actuator (15) connected to the fluid control valve (10), and the control port of the fluid control valve (10) connected to the outlet of the fluid pressure source (1). The first energy storage device (13) has its outlet connected to the fluid control valve (10); When energized, 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 port of the first one-way throttle valve (6) through the first reversing valve (110), and the straight 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 the power is 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 port of the second one-way throttle valve (112) through the first reversing valve (110), and the straight 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) is cut off, the fluid control valve (10) switches to the open position (102), and the outlet of the first energy storage device (13) is connected to the closed port (B2) of the first actuator (15) through the fluid control valve (10).

2. The automatic shutdown control device according to claim 1, characterized in that, It also includes a second check valve (8); The inlet of the second check valve (8) is connected to the outlet of the fluid pressure source (1), and the outlet of the second check valve (8) is connected to the first energy storage device (13).

3. The automatic shutdown control device according to claim 1, characterized in that, It also includes a solenoid valve (3), which is 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 energy storage device (13) through the solenoid valve (3); 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).

4. The automatic shutdown control device according to claim 1, characterized in that, Also includes: Second actuator (14); The third one-way throttle valve (4) has its throttle port 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 straight-through port of the third one-way throttle valve (4), respectively. The outlet of the third one-way valve (51) is connected to the descent port (A2) of the second actuator (14). The second reversing valve (2) is connected to the second reversing valve (2) by the through port of the third one-way throttle valve (4) and the through port of the fourth one-way throttle valve (52). The outlet of the fluid pressure source (1) is connected to the second reversing valve (2); The second return line is connected to the second reversing valve (2) at its inlet. A fourth check valve (9) is provided, the inlet of which is connected to the fluid control valve (10), and the outlet of which is connected to the downcomer port (A2). The fifth one-way throttle valve (7) has its throttle port connected to the fluid control valve (10) and its straight-through port connected to the shut-off port (B2). When energized, 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 port of the third one-way throttle valve (4) through the second reversing valve (2), and the straight 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 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 port of the fourth one-way throttle valve (52) through the second reversing valve (2), and the straight 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) is cut off, the fluid control valve (10) switches to the open position (102), and the outlet of the first energy storage device (13) is connected to the closed port (B2) of the first actuator (15) in sequence through the fluid control valve (10) and the fifth one-way throttle valve (7); the outlet of the first energy storage device (13) is connected to the descending port (A2) of the second actuator (14) in sequence 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 also 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 connected to the solenoid valve (3) and the first directional valve (110) respectively; 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 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 directional valve (110) through the solenoid valve (3) and the delay structure, so that the first directional 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, characterized in that, The delay structure includes: The sixth one-way throttle valve (121) has its straight-through port connected to the first reversing valve (110), and its throttle port connected to the solenoid valve (3). And / or, the delay structure includes a second energy storage device (125), the inlet of which is connected to the solenoid valve (3), and the outlet of which is connected to the first directional valve (110).

7. An automatic shutdown control device, characterized in that, include: First actuator (15); The first one-way throttle valve (6) has its throttle port connected to the opening 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 straight-through port of the first one-way throttle valve (6), respectively. The outlet of the first one-way valve (111) is connected to the shut-off port (B2) of the first actuator (15). The first reversing valve (110) has a through port of the first one-way throttle valve (6) 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). A fluid pressure source (1) is provided, the outlet of which is connected to the first directional valve (110). The first return line is connected to the first directional valve (110) at its inlet. A delay structure is provided, which is connected to the first reversing valve (110); the outlet of the fluid pressure source (1) is connected to the delay structure. When energized, 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 port of the first one-way throttle valve (6) through the first reversing valve (110), and the straight 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 the 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 through port of the second one-way throttle valve (112) through the first reversing valve (110). The 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, characterized in that, Also includes: Solenoid valve (3), the outlet of the fluid pressure source (1) is connected to the solenoid valve (3); When energized, the solenoid valve (3) switches to the third working position (31), and the solenoid valve (3) is not connected to the delay structure; 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) 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, characterized in that, The delay structure includes: The sixth one-way throttle valve (121) has its straight-through port connected to the first reversing valve (110), and its throttle port connected to the solenoid valve (3). And / or, the delay structure includes a second energy storage device (125), the inlet of which is connected to the solenoid valve (3), and the outlet of which is connected to the first directional valve (110).

10. The automatic shutdown control device according to claim 7, characterized in that, Also includes: Second actuator (14); The third one-way throttle valve (4) has its throttle port 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 straight-through port of the third one-way throttle valve (4), respectively. The outlet of the third one-way valve (51) is connected to the descent port (A2) of the second actuator (14). The second reversing valve (2) is connected to the second reversing valve (2) by the through port of the third one-way throttle valve (4) and the through port of the fourth one-way throttle valve (52). The outlet of the fluid pressure source (1) is connected to the second reversing valve (2); The second return line is connected to the second reversing valve (2) at its inlet. When energized, 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 port of the third one-way throttle valve (4) through the second reversing valve (2), and the straight 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 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 port of the fourth one-way throttle valve (52) through the second reversing valve (2), and the straight 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). After the second actuator (14) descends, the first actuator (15) closes again.

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

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