Inflation device of electron linear accelerator

Abstract

The utility model provides an air charging device of an electron linear accelerator, which comprises a protection component, an air charging component and a control component, and is characterized in that the protection component is provided with a protection channel communicated with a waveguide pipeline in the electron linear accelerator; the gas supply assembly comprises a gas supply channel communicated with the protection channel so as to introduce protection gas into the protection channel; the air supply electromagnetic valve is arranged on the air supply channel so as to control connection and disconnection of the air supply channel; one end of the exhaust pipeline is communicated with the protection channel, and the other end of the exhaust pipeline is connected with the external environment; and the exhaust electromagnetic valve is arranged on the exhaust pipeline so as to control connection or disconnection of the exhaust pipeline. The inflating device solves the technical problem that the pressure of the waveguide pipeline in the electron linear accelerator is inconvenient to monitor and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of electron accelerators, in particular to an inflator for an electron linear accelerator. Background Art

[0002] The FLASH instantaneous high-dose rate electron linear accelerator uses a klystron to generate microwaves. The microwaves pass through the klystron ceramic window, transmission waveguide, four-terminal circulator, and accelerating tube ceramic window in sequence and then enter the accelerating tube to accelerate the electrons generated by the electron gun in the accelerating tube, thereby realizing an instantaneous high-dose rate accelerator. Because microwaves are prone to high-voltage sparking in the transmission waveguide and four-terminal circulator, in order to avoid high-voltage sparking and ensure stable operation of the system, the density of gas molecules in the transmission waveguide and four-terminal circulator is increased. Therefore, it is necessary to fill the microwave transmission channel composed of the klystron ceramic window, transmission waveguide, four-terminal circulator, and accelerating tube ceramic window with SF 6 Gas. Considering the pressure resistance of the four-end circulator, the ceramic window of the accelerator tube and the ceramic window of the klystron tube, the general filling pressure range is between 0.1MPa and 0.2MPa. However, as the accelerator runs, the gas pressure in the microwave transmission channel will gradually decrease, so gas must be replenished regularly or irregularly.

[0003] However, the SF 6 Gas replenishment is mostly done manually. Artificial gas replenishment is prone to overpressure or untimely gas replenishment. Once the pressure exceeds the ceramic window pressure resistance value, the ceramic window will rupture, or untimely gas replenishment will lead to high-voltage ignition, which cannot guarantee the safe operation and work efficiency of the electron linear accelerator.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The utility model aims to overcome the above technical deficiencies and provide a gas filling device for an electron linear accelerator to solve the technical problem in the related art that the pressure of the protective gas filled into the microwave transmission channel of the electron linear accelerator is inconvenient to control.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: an inflation device for an electron linear accelerator is provided, comprising: a protection component, the protection component having a protection channel connected to a microwave transmission channel; an air supply assembly, the air supply assembly comprising an air supply channel connected to the protection channel to introduce a protective gas into the protection channel; an air supply solenoid valve, the air supply solenoid valve is arranged on the air supply channel to control the connection and disconnection of the air supply channel; an exhaust pipeline, one end of the exhaust pipeline is connected to the protection channel, and the other end of the exhaust pipeline is connected to the external environment; an exhaust solenoid valve, the exhaust solenoid valve is arranged on the exhaust pipeline to control the connection or disconnection of the exhaust pipeline.

[0007] Furthermore, one end of the exhaust pipeline away from the protection channel is connected to the gas supply component to pass the protection gas in the channel into the gas supply component.

[0008] Furthermore, the inflation device of the electron linear accelerator includes: a driving power supply for power supply; a first relay, connected to the driving power supply, the first relay is connected to the air supply solenoid valve to control the opening or closing of the air supply solenoid valve; a second relay, connected to the driving power supply, the second relay is connected to the exhaust solenoid valve to control the opening or closing of the exhaust solenoid valve.

[0009] Furthermore, the inflation device of the electron linear accelerator also includes: an air supply pressure gauge connected to the protection component to measure the air pressure in the protection channel, and the air supply pressure gauge is connected to the first relay signal.

[0010] Furthermore, the inflation device of the electron linear accelerator also includes a control module, which is signal-connected to the air supply pressure gauge, the first relay, the pressure relief pressure gauge, and the second relay. The control module is provided with a first pressure threshold for triggering the first relay and a second pressure threshold for disconnecting the first relay; the control module is also provided with a third pressure threshold for triggering the second relay and a fourth pressure threshold for disconnecting the second relay; wherein the first pressure threshold < the third pressure threshold < the second pressure threshold < the fourth pressure threshold.

[0011] Further, the first pressure threshold is 0.10 MPa, and / or the second pressure threshold is 0.18 MPa, the third pressure threshold is 0.12 MPa, and / or the fourth pressure threshold is 0.20 MPa.

[0012] Furthermore, the inflation device of the electron linear accelerator also includes: a pressure relief valve, which is arranged on the protection component and is used to automatically relieve pressure when the protection channel exceeds a fifth pressure threshold, wherein the fourth pressure threshold < the fifth pressure threshold < the pressure resistance value of the microwave transmission channel.

[0013] Furthermore, there are multiple pressure relief valves, and the multiple pressure relief valves are arranged on the protection component at intervals.

[0014] Furthermore, the protection channel is a cylindrical structure.

[0015] Furthermore, the gas supply assembly includes: a gas cylinder for storing protective gas, the gas cylinder is connected to the gas supply channel; a valve, the valve is arranged on the gas supply channel to control the connection and closing of the gas supply channel; the pressure reducing valve, the pressure reducing valve is arranged on the gas supply channel, and the pressure reducing valve is located downstream of the valve.

[0016] Beneficial effects:

[0017] 1. The charging device of the electron linear accelerator of the utility model is improved with respect to the protective gas charging system, and can realize automatic charging and replenishing of the electron linear accelerator, thereby saving labor costs and improving the safety of operation.

[0018] 2. The inflation device of the electron linear accelerator of the utility model has multiple protection mechanisms, and radiation protection is also performed on the control system, thereby avoiding economic losses caused by overpressure due to operating errors or failure of the pressure indicating device.

[0019] 3. The multiple pressure relief valves of the inflation device of the electronic linear accelerator of the utility model ensure that pressure relief can be achieved when overpressure is caused by operating errors or failure of the pressure indicating device, thereby avoiding overpressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the inflation device of the electron linear accelerator adopted in the embodiment of the utility model.

[0021] The above drawings include the following reference numerals:

[0022] 01. Gas cylinder; 02. Valve; 03. Pressure reducing valve; 30. Gas supply assembly; 31. Gas supply channel; 40. Exhaust pipeline; 41. First relay; 42. Second relay; 05. Gas supply solenoid valve; 06. Exhaust solenoid valve; 08. Gas supply pressure gauge; 09. Pressure relief valve; 11. Pressure relief pressure gauge; 12. Protective components. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] According to an embodiment of the utility model, an inflatable device for an electron linear accelerator is provided. Figure 1, including: a protection component 12, the protection component 12 has a protection channel connected to the microwave transmission channel composed of a klystron ceramic window, a transmission waveguide, a four-terminal circulator, and an accelerating tube ceramic window; a gas supply component 30, including a gas supply channel 31 connected to the protection channel to introduce a protective gas into the protection channel; a gas supply solenoid valve 05, the gas supply solenoid valve 05 is arranged on the gas supply channel 31 to control the connection and disconnection of the gas supply channel 31; an exhaust pipeline 40, one end of the exhaust pipeline 40 is connected to the protection channel, and the other end of the exhaust pipeline 40 is connected to the external environment; an exhaust solenoid valve 06, the exhaust solenoid valve 06 is arranged on the exhaust pipeline 40 to control the connection or disconnection of the exhaust pipeline 40.

[0025] With the above arrangement, when the microwave transmission channel is transmitting microwaves, if there is insufficient gas in the protection channel, the gas supply component 30 controls the gas supply solenoid valve 05 on the gas supply channel 31 to introduce protective gas into the protection channel; when there is excessive gas in the protection channel, the gas discharge in the protection channel is controlled by the exhaust pipeline 40 and the exhaust solenoid valve 06. The gas supply solenoid valve 05 and the exhaust solenoid valve 06 can be automatically opened or closed according to the gas pressure in the protection channel, thereby solving the technical problem in the related art that the pressure of the protective gas filled into the electron linear accelerator is inconvenient to control.

[0026] Specifically, the microwave transmission channel refers to the microwave transmission space composed of the klystron ceramic window, the transmission waveguide, the four-terminal circulator, and the accelerating tube ceramic window.

[0027] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 The charging device of the electron linear accelerator includes: a driving power supply for power supply; a first relay 41 connected to the driving power supply, the first relay 41 is connected to the air supply solenoid valve 05 to control the opening or closing of the air supply solenoid valve 05; a second relay 42 connected to the driving power supply, the second relay 42 is connected to the exhaust solenoid valve 06 to control the opening or closing of the exhaust solenoid valve 06. In this way, the driving power supply is connected to the first relay 41 and the second relay 42, and the first relay 41 and the second relay 42 control the opening and closing of the air supply solenoid valve 05 and the exhaust solenoid valve 06 respectively by turning on and off the power, and further control the opening and closing of the air supply channel 31 and the exhaust pipeline 40.

[0028] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 The charging device of the electron linear accelerator further includes: an air supply pressure gauge 08, which is connected to the protection component 12 to measure the air pressure in the protection channel, and the air supply pressure gauge 08 is signal-connected to the first relay 41. In this way, the first relay 41 controls the on-off of the air supply channel 31 through the voltage signal measured by the air supply pressure gauge 08, so that the air pressure value in the protection component 12 is maintained within a stable range to achieve a protective effect.

[0029] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 The inflation device of the electron linear accelerator also includes a control module, which is connected to the air supply pressure gauge 08 and the first relay 41 by signals. The control module is provided with a first pressure threshold for triggering the first relay 41 and a second pressure threshold for triggering the second relay 42; wherein the first pressure threshold is less than the second pressure threshold. In this way, when the air supply pressure gauge 08 detects that the pressure value of the protection component 12 is lower than the first pressure threshold, the first relay 41 is closed, the driving power supply starts to supply power to the air supply solenoid valve 05, the air supply solenoid valve 05 opens after being energized, the air supply channel 31 opens, and the air supply component 30 starts to supply air to the protection channel; when the air supply pressure gauge 08 detects that the air pressure reaches the second pressure threshold, the first relay 41 is disconnected, the driving power supply stops supplying power to the air supply solenoid valve 05, the air supply channel 31 is closed, and the gas stops entering the protection channel.

[0030] When the pressure relief barometer 11 detects that the pressure value of the protection component 12 is higher than the fourth pressure threshold, the second relay 42 is closed, the driving power supply starts to supply power to the exhaust solenoid valve 06, the exhaust solenoid valve 06 opens after being powered on, the exhaust pipeline 40 opens, and the protection channel discharges the gas through the exhaust pipeline 40; when the pressure relief barometer 11 detects that the pressure value reaches the third pressure threshold, the second relay 42 is disconnected, the driving power supply stops supplying power to the exhaust solenoid valve 06, the exhaust solenoid valve 06 closes after being powered off, the exhaust pipeline 40 closes, and stops exhausting to the external environment so that the gas pressure value in the protection channel is maintained within a stable range. The first pressure threshold < the third pressure threshold < the second pressure threshold < the fourth pressure threshold.

[0031] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 , the first pressure threshold is 0.10Mpa; and / or, the second pressure threshold is 0.18Mpa; the third pressure threshold is 0.12Mpa; and / or, the fourth pressure threshold is 0.20Mpa.

[0032] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 The inflation device of the electron linear accelerator also includes: a pressure relief valve 09, which is arranged on the protection component 12; when the air supply solenoid valve 05 or the exhaust solenoid valve 06 fails and the air pressure value in the protection channel exceeds the set fifth pressure threshold, the pressure relief valve 09 automatically opens to release the pressure. Among them, the fourth pressure threshold < the fifth pressure threshold < the withstand pressure value of the microwave transmission channel. The withstand pressure value of the microwave transmission channel is determined by the smallest withstand pressure value among the klystron ceramic window, the transmission waveguide, the four-terminal circulator, and the accelerator ceramic window.

[0033] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1There are multiple pressure relief valves 09, and the multiple pressure relief valves 09 are arranged on the protection component 12 at intervals.

[0034] In order to ensure the safety of the accelerator, the pressure relief valve 09 is interlocked with the accelerator. When the pressure relief valve 09 is triggered, the accelerator stops emitting beams.

[0035] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 , the protection channel is a cylindrical structure. In this way, the pressure at each position in the cylindrical channel is similar, avoiding inaccurate data of the pressure relief barometer 11 caused by excessive local pressure.

[0036] In the inflation device of the electron linear accelerator of this embodiment, see Figure 1 The gas supply assembly 30 includes: a gas cylinder 01 for storing protective gas, the gas cylinder 01 is connected to the gas supply channel 31; a valve 02, the valve 02 is arranged on the gas supply channel 31 to control the connection and closing of the gas supply channel 31; a pressure reducing valve 03, the pressure reducing valve 03 is arranged on the gas supply channel 31, and the pressure reducing valve 03 is located downstream of the valve 02. In this way, after the valve 02 is opened, the protective gas flows out from the gas cylinder 01, and after being reduced in pressure by the pressure reducing valve 03, it smoothly enters the gas supply channel 31.

[0037] Preferably, the protective gas is SF6 gas, and other gases such as nitrogen, oxygen, helium, etc. can also be automatically filled.

[0038] Embodiment 1:

[0039] Turn valve 02 to release the compressed SF6 gas in gas cylinder 01, and observe whether the pressure gauge at the inlet end of pressure reducing valve 03 is normal. If it is normal, turn the regulating device of pressure reducing valve 03 to control the outlet pressure below 0.2MPa. The first relay 41 and the second relay 42 respectively control the gas supply solenoid valve 05 and the exhaust solenoid valve 06 according to the actual air pressure measured by the gas supply pressure gauge 08. When the measured air pressure is lower than the set 0.10MPa, the first relay 41 supplies power to the gas supply solenoid valve 05, and the gas supply solenoid valve 05 will operate, and SF6 gas will enter the microwave transmission channel. When the air pressure value measured by the gas supply pressure gauge 08 reaches the set 0.18MPa, the first relay 41 cuts off the power to the gas supply solenoid valve 05, and the gas supply solenoid valve 05 will close, and SF6 gas will stop entering the transmission waveguide. When the air pressure value measured by the pressure relief pressure gauge 11 is higher than the set 0.20MPa, the second relay 42 will energize the exhaust solenoid valve 06, and the exhaust solenoid valve 06 will open the circuit to relieve pressure until it drops to the safe air pressure of 0.12MPa. The second relay 42 will de-energize the exhaust solenoid valve 06, and the exhaust solenoid valve 06 will close.

[0040] If the gas supply solenoid valve 05 and the exhaust solenoid valve 06 malfunction, causing the gas pressure in the microwave transmission channel to exceed the set value of the pressure relief valve 09, the pressure relief valve 09 will automatically open to release the pressure to protect the safety of the microwave transmission channel.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0043] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0044] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0045] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An inflator for an electron linear accelerator, characterized in that: include: A protection component (12), the protection component (12) having a protection channel communicating with the waveguide tube; A gas supply component (30), the gas supply component (30) comprising a gas supply channel (31) in communication with the protection channel, so as to introduce protection gas into the protection channel; An air supply solenoid valve (05), the air supply solenoid valve (05) being arranged on the air supply passage (31) to control the connection and disconnection of the air supply passage (31); an exhaust pipeline (40), one end of the exhaust pipeline (40) being in communication with the protection channel, and the other end of the exhaust pipeline (40) being in communication with the outside of the protection channel; An exhaust solenoid valve (06), wherein the exhaust solenoid valve (06) is arranged on the exhaust pipeline (40) to control the connection or disconnection of the exhaust pipeline (40).

2. The inflation device for an electron linear accelerator according to claim 1, characterized in that: One end of the exhaust pipeline (40) away from the protection channel is connected to the gas supply component (30) so as to pass the protection gas in the channel into the gas supply component (30).

3. The inflation device for an electron linear accelerator according to claim 1, characterized in that: The inflation device of the electron linear accelerator also includes: A pressure relief valve (09), wherein the pressure relief valve (09) is arranged on the protection component (12); A pressure relief air pressure gauge (11), wherein the pressure relief air pressure gauge (11) is arranged on the protective component (12).

4. The inflation device for an electron linear accelerator according to claim 3, characterized in that: There are a plurality of pressure relief valves (09), and the plurality of pressure relief valves (09) are arranged on the protection component (12) at intervals.

5. The inflation device for an electron linear accelerator according to claim 1, characterized in that: The charging device of the electron linear accelerator comprises: A driving power source for supplying power; A first relay (41) connected to the driving power supply, the first relay (41) being connected to the air supply solenoid valve (05) to control the opening or closing of the air supply solenoid valve (05); A second relay (42) is connected to the driving power supply, and the second relay (42) is connected to the exhaust solenoid valve (06) to control the exhaust solenoid valve (06) to open or close.

6. The inflation device for an electron linear accelerator according to claim 5, characterized in that: The inflation device of the electron linear accelerator also includes: An air supply pressure gauge (08) is connected to the protection component (12) to measure the air pressure in the protection channel, and the air supply pressure gauge (08) is signal-connected to the first relay (41).

7. The inflation device for an electron linear accelerator according to claim 6, characterized in that: The electron linear accelerator also includes a control module, the control module is signal-connected to the air supply pressure gauge (08), the first relay (41), the second relay (42) and the pressure relief pressure gauge (11), and the control module is provided with a first pressure threshold for triggering the first relay (41), a second pressure threshold for disconnecting the first relay, a third pressure threshold for triggering the second relay and a fourth pressure threshold for disconnecting the second relay; wherein the first pressure threshold is less than the third pressure threshold, less than the second pressure threshold and less than the fourth pressure threshold.

8. The inflation device for an electron linear accelerator according to claim 7, characterized in that: The first pressure threshold is 0.10 MPa; and / or the second pressure threshold is 0.18 MPa.

9. The inflation device for an electron linear accelerator according to claim 1, characterized in that: The protection channel is a cylindrical structure.

10. The charging device for an electron linear accelerator according to any one of claims 1 to 9, characterized in that: The air supply assembly (30) comprises: A gas cylinder (01) for storing the protective gas, the gas cylinder (01) being connected to the gas supply channel (31); A valve (02), the valve (02) being arranged on the air supply channel (31) to control the connection and closing of the air supply channel (31); A pressure reducing valve (03), the pressure reducing valve (03) being arranged on the air supply channel (31), the pressure reducing valve (03) being located downstream of the valve (02).

Images