A three-axis radiation-resistant ionization chamber sensor

Abstract

The present invention discloses a three-axis radiation-resistant ionization chamber sensor, which comprises a housing sleeve. Inside the housing sleeve, a high-voltage electrode and a collecting electrode are arranged, and the high-voltage electrode and the collecting electrode are coaxially arranged. The high-voltage electrode comprises an inner high-voltage barrel and an outer high-voltage barrel which are coaxially sleeved, and the inner high-voltage barrel and the outer high-voltage barrel are fixedly and electrically connected. The collecting electrode is a barrel-shaped structure with both ends open, and the collecting electrode is disposed between the inner high-voltage barrel and the outer high-voltage barrel. The front ends of the high-voltage electrode and the collecting electrode are fixedly connected to the housing sleeve through a front-end support assembly. The rear ends of the high-voltage electrode and the collecting electrode are fixedly connected to the housing sleeve through a rear-end support assembly. By respectively arranging a front-end support assembly and a rear-end support assembly between the housing sleeve, the outer high-voltage barrel, the collecting electrode and the inner high-voltage barrel, the present invention can firmly fix the high-voltage electrode and the collecting electrode inside the housing sleeve, avoid the relative movement between the high-voltage electrode and the collecting electrode caused by external vibration, and enhance the seismic resistance of the ionization chamber sensor.

Description

Technical Field

[0001] The present invention belongs to the field of ionization radiation measurement components, and particularly relates to a three-axis radiation-resistant ionization chamber sensor. Background Art

[0002] An ionization chamber sensor is a detector that measures ionization radiation using the ionization effect of ionization radiation, also known as an ion chamber. The ionization chamber consists of electrodes at different potentials and the medium therebetween. Ionization radiation generates ion pairs in the medium, and under the action of an electric field, positive and negative ions drift towards the negative and positive electrodes respectively, forming an ionization current. Since the ionization current is proportional to the intensity of the radiation, measuring this current can obtain the intensity of the ionization radiation.

[0003] Ionization chamber sensors usually work in harsh environments. To avoid being affected by the harsh environment, a housing sleeve is provided outside each component, and then the components are fixed to one end of the housing sleeve by fastening components to achieve the installation and fixation of the entire ionization chamber sensor.

[0004] However, the fastening method of the above ionization chamber sensor is relatively simple, and the seismic resistance is poor. When facing strong vibrations, the internal structure is easily damaged. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-axis radiation-resistant ionization chamber sensor, optimize the seismic mechanism, and optimize the seismic mechanism at both ends of the ionization chamber sensor, which can improve the seismic resistance of the ionization chamber sensor.

[0006] The present invention adopts the following technical solutions: a three-axis radiation-resistant ionization chamber sensor, including a housing sleeve, a high-voltage electrode and a collecting electrode are arranged inside the housing sleeve, and the high-voltage electrode and the collecting electrode are coaxially arranged;

[0007] The high-voltage electrode includes an inner high-voltage barrel and an outer high-voltage barrel coaxially sleeved, and the inner high-voltage barrel and the outer high-voltage barrel are fixedly electrically connected;

[0008] The collecting electrode is a barrel-shaped structure with both ends open, and the collecting electrode penetrates between the inner high-voltage barrel and the outer high-voltage barrel;

[0009] The front ends of the high-voltage electrode and the collecting electrode are fixedly connected to the housing sleeve through a front-end support assembly; the rear ends of the high-voltage electrode and the collecting electrode are fixedly connected to the housing sleeve through a rear-end support assembly.

[0010] Further, the front-end support assembly includes a front-end insulating support ring hermetically arranged between the outer peripheral surface of the outer high-voltage barrel and the inner peripheral surface of the housing sleeve;

[0011] A pressing plate is connected to the front end of the front-end insulating support ring, and a pressing block is arranged on the rear end surface of the pressing plate;

[0012] The front-end support assembly further includes a front-end insulating pressure ring. The rear end of the front-end insulating pressure ring abuts against the front end of the collector, and the front end of the front-end insulating pressure ring is connected to the pressing block.

[0013] Furthermore, the inner wall of the rear end of the front-end insulating support ring has a step for accommodating the front end portion of the outer high-voltage barrel;

[0014] The side surface of the step has an internal thread, and the outer peripheral surface of the front end of the outer high-voltage barrel has an external thread matching the internal thread.

[0015] Furthermore, a high-voltage pole connection pin and a high-voltage pole limiting rod are respectively arranged at the front end of the outer high-voltage barrel;

[0016] An accommodating cavity is arranged inside the front-end insulating support ring, and the accommodating cavity extends from the inner peripheral surface to the outer peripheral surface of the front-end insulating support ring;

[0017] The accommodating cavity is used for accommodating the high-voltage pole connection pin or the high-voltage pole limiting rod, and the accommodating cavity for the high-voltage pole connection pin penetrates through the front end face and the rear end face of the front-end insulating support ring.

[0018] Furthermore, the extension distance of at least one accommodating cavity from the inner peripheral surface to the outer peripheral surface of the front-end insulating support ring is greater than the thickness of the outer high-voltage barrel.

[0019] Furthermore, a collector connection pin and a collector limiting rod are respectively arranged at the front end of the collector;

[0020] The front-end insulating pressure ring has a relief hole for accommodating the collector connection pin and the collector limiting rod;

[0021] The relief hole for accommodating the collector connection pin penetrates through the front end face and the rear end face of the front-end insulating pressure ring.

[0022] Furthermore, a pressure rod is also arranged at the rear end of the pressing plate, a pressure hole is opened at the corresponding position of the front-end insulating pressure ring with respect to the pressure rod, and the depth of the pressure hole is less than the length of the pressure rod.

[0023] Furthermore, the inner high-voltage barrel and the outer high-voltage barrel are connected by a front-end connection reinforcement pipe;

[0024] The front end of the inner high-voltage barrel has an accommodating recess, a through hole for the front-end connection reinforcement pipe to pass through is opened on the collector, and a connection hole for fixedly connecting with the front-end connection reinforcement pipe is opened on the outer high-voltage barrel.

[0025] Furthermore, the rear-end support assembly includes a rear-end insulating pressure ring and a rear-end insulating support ring;

[0026] The rear-end insulating pressure ring is connected to the rear end of the collector, and the rear-end insulating support ring is arranged between the outer high-voltage barrel and the outer shell;

[0027] The rear end of the rear-end insulating support ring and the rear end of the rear-end insulating pressure ring are connected by a rear-end plugging plate. An inner ring and an outer ring are respectively arranged on the front end face of the rear-end plugging plate. The inner ring is used to connect with the rear-end insulating pressure ring, and the outer ring is used to connect with the rear-end insulating support ring;

[0028] The rear-end support assembly further includes a rear-end connection reinforcement pipe, which is used to realize the connection between the inner high-voltage barrel and the outer high-voltage barrel.

[0029] Furthermore, an air injection through-hole is opened on the rear-end plugging plate inside the inner ring, and the air injection through-hole extends from the front end face of the rear-end plugging plate to its rear end face;

[0030] A rear-end cover for plugging the air injection through-hole is further arranged at the rear end of the rear-end plugging plate.

[0031] The beneficial effects of the present invention are as follows: By respectively arranging a front-end support assembly and a rear-end support assembly between the outer shell sleeve, the outer high-voltage barrel, the collector electrode and the inner high-voltage barrel, the present invention can firmly fix the high-voltage electrode and the collector electrode inside the outer shell sleeve, avoid the relative movement between the high-voltage electrode and the collector electrode caused by external vibration, and enhance the seismic resistance of the ionization chamber sensor. Description of the Drawings

[0032] Figure 1 It is a cross-sectional view of a three-axis radiation-resistant ionization chamber sensor according to an embodiment of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the front-end support assembly in the embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the assembly relationship between the front-end insulating support ring and the outer high-voltage barrel in the embodiment of the present invention;

[0035] Figure 4 It is a schematic structural diagram of the accommodation cavity in the embodiment of the present invention;

[0036] Figure 5 It is a schematic structural diagram of the pressing plate in the embodiment of the present invention;

[0037] Figure 6 It is a schematic diagram of the cooperation relationship between the front-end insulating pressure ring and the pressing plate in the embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of the installation position of the connection reinforcement pipe in the embodiment of the present invention;

[0039] Figure 8 It is a schematic structural diagram of the collector electrode in the embodiment of the present invention;

[0040] Figure 9 It is a schematic cross-sectional structural diagram of the rear-end support assembly in the embodiment of the present invention.

[0041] Among them: 310. Electrode connecting piece;

[0042] 320. Adapter;

[0043] 330. Front-end support assembly;

[0044] 331. Front-end insulating support ring; 331A. Accommodating cavity;

[0045] 332. Front-end connection reinforcement tube;

[0046] 333. Pressure plate; 333A. Pressure rod; 333B. Pressure block;

[0047] 334. Front-end insulating pressure ring; 334A. Relief hole;

[0048] 340. Outer housing sleeve;

[0049] 350. High-voltage electrode;

[0050] 351. Outer high-voltage barrel; 351A. High-voltage electrode connection pin; 351B. High-voltage electrode limiting rod; 351C. Fixing hole;

[0051] 352. Inner high-voltage barrel;

[0052] 360. Collector electrode;

[0053] 361. Collector electrode connection pin; 362. Collector electrode limiting rod;

[0054] 370. Rear-end support assembly;

[0055] 371. Rear-end plugging plate; 372. Rear-end insulating support ring; 373. Rear-end insulating pressure ring; 374. Rear-end connection reinforcement tube;

[0056] 380. Rear-end cover;

[0057] 390. Radiation source. Specific embodiments

[0058] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] The present invention discloses a three-axis radiation-resistant ionization chamber sensor, as Figure 1As shown in the figure, it includes a housing sleeve 340. Inside the housing sleeve 340, a high-voltage electrode 350 and a collecting electrode 360 are provided. The high-voltage electrode 350 and the collecting electrode 360 are coaxially arranged. The housing sleeve 340 is in the shape of a cylinder with both ends open, and it is coaxially arranged with the collecting electrode 360. The high-voltage electrode 350 includes an inner high-voltage barrel 352 and an outer high-voltage barrel 351 which are coaxially sleeved, and the inner high-voltage barrel 352 and the outer high-voltage barrel 351 are fixedly and electrically connected; the collecting electrode 360 is in the shape of a barrel with both ends open, and the collecting electrode 360 is disposed between the inner high-voltage barrel 352 and the outer high-voltage barrel 351; the front ends of the high-voltage electrode 350 and the collecting electrode 360 are fixedly connected to the housing sleeve 340 through a front-end support assembly 330; the rear ends of the high-voltage electrode 350 and the collecting electrode 360 are fixedly connected to the housing sleeve 340 through a rear-end support assembly 370.

[0060] In the present invention, by respectively providing a front-end support assembly and a rear-end support assembly between the housing sleeve, the outer high-voltage barrel, the collecting electrode and the inner high-voltage barrel, the high-voltage electrode and the collecting electrode can be firmly fixed inside the housing sleeve, avoiding the relative movement between the high-voltage electrode and the collecting electrode caused by external vibration, and enhancing the seismic resistance of the ionization chamber sensor.

[0061] In the embodiment of the present invention, the fixed electrical connection means that there is a fixed connection between two connected components, and there is electrical conductivity between the two. Specifically in this embodiment, it means that the inner high-voltage barrel 352 and the outer high-voltage barrel 351 have electrical conductivity and are fixedly connected.

[0062] In one embodiment, the front-end support assembly 330 includes a front-end insulating support ring 331 hermetically disposed between the outer peripheral surface of the outer high-voltage barrel 351 and the inner peripheral surface of the housing sleeve 340; a pressing plate 333 is connected to the front end of the front-end insulating support ring 331, and a pressing block 333B is provided on the rear end surface of the pressing plate 333; the front-end support assembly 330 further includes a front-end insulating pressing ring 334, the rear end of the front-end insulating pressing ring 334 abuts against the front end of the collecting electrode 360, and the rear end of the front-end insulating pressing ring 334 is connected to the pressing block 333B.

[0063] In this way, by pressing the front end of the collecting electrode 360 with the front-end insulating pressing ring 334, the fixation of the front end of the collecting electrode 360 is realized. By the front-end insulating support ring 331, the fixation between the housing sleeve 340 and the outer high-voltage barrel 351 is realized. Then, by the pressing plate 333, the fixation between the front-end insulating support ring 331 and the front-end insulating pressing ring 334 is realized. Furthermore, the high-voltage electrode 350 and the collecting electrode 360 can be all fixed inside the housing sleeve 340. Even when the outside of the ionization chamber sensor is vibrated, the whole ionization chamber sensor forms a complete integral structure, avoiding the influence of vibration on the ionization chamber sensor.

[0064] As a specific implementation form, the inner wall of the rear end of the front-end insulating support ring 331 has a step for accommodating the front end of the outer high-voltage barrel 351; the side of the step has an internal thread, and the outer peripheral surface of the front end of the outer high-voltage barrel 351 has an external thread matching the internal thread. In this way, the outer high-voltage barrel 351 and the outer shell 340 are threadedly connected, further increasing the connection firmness between the two. Moreover, through this connection thread, the relative displacement between the two in the front and rear directions can be prevented when subjected to external vibration.

[0065] In addition, in one embodiment, a high-voltage electrode connection pin 351A and a high-voltage electrode limiting rod 351B are respectively arranged at the front end of the outer high-voltage barrel 351. The high-voltage electrode connection pin 351A is used to pass through the pressure plate 333 and then connect to an external electrode through an electrical component. An accommodation cavity 331A is provided inside the front-end insulating support ring 331. The accommodation cavity 331A extends from the front end face to the rear end face of the front-end insulating support ring 331 and from the inner peripheral surface to the outer peripheral surface of the front-end insulating support ring 331; the accommodation cavity 331A is used to accommodate the high-voltage electrode connection pin 351A or the high-voltage electrode limiting rod 351B, and the accommodation cavity 331A for the high-voltage electrode connection pin 351A penetrates through the front end face and the rear end face of the front-end insulating support ring 331. By providing the high-voltage electrode limiting rod 351 and the accommodation cavity 331A, relative rotation between the outer high-voltage barrel 351 and the front-end insulating support ring 331 can be avoided, further improving the connection stability between the two.

[0066] In one embodiment, the extension distance of at least one accommodation cavity 331A from the inner peripheral surface to the outer peripheral surface of the front-end insulating support ring 331 is greater than the thickness of the outer high-voltage barrel 351. By setting it like this, the existence of this accommodation cavity 331A can ensure the interconnection between the inner cavity and the outer cavity of the outer high-voltage barrel 351. Then, when introducing working gas into the ionization chamber sensor cavity, the working pressure at each part is the same, ensuring the accuracy of the ionization chamber sensor.

[0067] Specifically, a collector connection pin 361 and a collector limiting rod 362 are respectively arranged at the front end of the collector 360; a relief hole 334A is provided on the front-end insulating pressure ring 334, and the relief hole 334A is used to accommodate the collector connection pin 361 and the collector limiting rod 362; the relief hole 334A for accommodating the collector connection pin 361 penetrates through the front end face and the rear end face of the front-end insulating pressure ring 334. This setting method is similar to the design method of the above-mentioned outer high-voltage barrel 351, and can also prevent relative rotation between the collector 360 and the front-end insulating pressure ring 334, thereby increasing the integrity of each component and ensuring the working state of the ionization chamber sensor.

[0068] More specifically, the connection between the front-end insulating pressure ring 334 and the front end of the collector 360 can also be set as a threaded connection, further increasing the connection firmness between the two and avoiding relative rotation and front-back displacement.

[0069] In one embodiment, a pressure rod 333A is further provided at the rear end of the pressure plate 333. A pressure hole is formed at a position corresponding to the pressure rod 333A on the front-end insulating pressure ring 334, and the depth of the pressure hole is less than the length of the pressure rod 333A. The number of the pressure rods 333A is at least two and they are symmetrically arranged. By providing the pressure rods 333A, the pressure of the pressure plate 333 on the front-end insulating pressure ring 334 can be made more stable, avoiding the problem of pressure imbalance caused by the uneven contact end faces of the two and ultimately resulting in uneven pressure, and further increasing the relative stability between the pressure plate 333 and the front-end insulating pressure ring 334.

[0070] More specifically, the shape of the pressure plate 333 may not be specifically limited as long as the above conditions are met. In addition, the connection between the pressure plate 333 and the front-end insulating support ring 331 may also use the above-mentioned pressure rods, or threaded holes may be formed at the front end of the front-end insulating support ring 331 and connected by bolts, which can make the connection more stable.

[0071] In the embodiment of the present invention, the inner high-pressure barrel 352 is connected to the outer high-pressure barrel 351 through the front-end connection reinforcement pipe 332; the front end of the inner high-pressure barrel 352 has a receiving recess, and a through hole for the front-end connection reinforcement pipe 332 to pass through is formed on the collecting electrode 360. In this embodiment, the through hole is designed as a waist-shaped hole and is much larger than the interface of the front-end connection reinforcement pipe 332. Furthermore, when the working gas is filled into the ionization chamber sensor, the inner and outer spaces of the collecting electrode 360 are connected, accelerating the diffusion of the working gas.

[0072] A connection hole for fixedly connecting with the front-end connection reinforcement pipe 332 is formed on the outer high-pressure barrel 351. In this embodiment, both ends of the front-end connection reinforcement pipe 332 pass through the two through holes and are finally fixedly connected to the outer high-pressure barrel 351, realizing the fixation between the outer high-pressure barrel 351 and the inner high-pressure barrel 352, making the two a whole. Furthermore, when subjected to external vibration, relative displacement will not occur.

[0073] In addition, in the embodiment of the present invention, the rear-end support assembly 370 includes a rear-end insulating pressure ring 373 and a rear-end insulating support ring 372. The rear-end insulating pressure ring 373 is connected to the rear end of the collecting electrode 360, and the rear-end insulating support ring 372 is arranged between the outer high-pressure barrel 351 and the housing sleeve 340; the rear end of the rear-end insulating support ring 372 and the rear end of the rear-end insulating pressure ring 373 are connected by a rear-end plugging plate 371. An inner ring and an outer ring are respectively arranged on the front-end face of the rear-end plugging plate 371. The inner ring is used for connecting with the rear-end insulating pressure ring 373, and the outer ring is used for connecting with the rear-end insulating support ring 372; the rear-end support assembly 370 further includes a rear-end connection reinforcement pipe 374, and the rear-end connection reinforcement pipe 374 is used to realize the connection between the inner high-pressure barrel 352 and the outer high-pressure barrel 351.

[0074] In this embodiment, the connection method of the rear end insulating support ring 372 is based on the same design concept as the front end insulating support ring 331, the connection method of the rear end insulating pressure ring 373 is based on the same design concept as the front end insulating pressure ring 334, and the connection method of the rear end connection reinforcement tube 374 is based on the same design concept as the front end connection reinforcement tube 332, thereby making the front and rear ends of the ionization chamber sensor firmly connected.

[0075] In one implementation, a gas-increasing through hole is provided on the rear end plugging plate 371, located inside the inner ring, and the gas-increasing through hole extends from the front end surface of the rear end plugging plate 371 to its rear end surface; a rear end cover 380 for sealing the gas-increasing through hole is also provided at the rear end of the rear end plugging plate 371. Preferably, the rear end cover 380 can be designed to be directly fixedly connected to the outer shell 340, so as to improve the aesthetics while ensuring the sealing of the product.

[0076] In addition, an adapter 320 is also provided at the front end of the outer shell 340, and the front end of the outer shell 340 can be sealed, and an electrode connector 310 is installed on the adapter 320. During use, the external electrode is directly inserted into the electrode connector 310, and connected to the high-voltage electrode connecting needle 351A and the collecting electrode connecting needle 361, thereby transmitting the current information collected by the ionization chamber sensor to the predetermined device.

[0077] In addition, since the ionization chamber sensor needs to be activated by the radiation source to work, a radiation source 390 is also provided in the ionization chamber sensor. As a specific implementation form, the radiation source 390 can be installed on the pressing block 333B. Since the pressing block 333B is located in the middle of the ionization chamber sensor, the excitation effect of the radiation source 390 on the entire ionization chamber sensor can be improved.

[0078] In summary, the ionization chamber sensor of the embodiment of the present invention can improve the connection strength of internal components, can maintain the working state and working accuracy when subjected to external vibration, and greatly reduces the impact of external vibration.

Claims

1. A three-axis radiation-resistant ionization chamber sensor, characterized in that, It comprises an outer shell (340), wherein a high-voltage electrode (350) and a collecting electrode (360) are arranged inside the outer shell (340), and the high-voltage electrode (350) and the collecting electrode (360) are arranged coaxially; The high-voltage pole (350) comprises an inner high-voltage barrel (352) and an outer high-voltage barrel (351) which are coaxially sleeved, and the inner high-voltage barrel (352) and the outer high-voltage barrel (351) are fixedly electrically connected; The collecting electrode (360) is a barrel-shaped structure with two open ends, and the collecting electrode (360) is disposed between the inner high-pressure barrel (352) and the outer high-pressure barrel (351); The front ends of the high-voltage pole (350) and the collecting pole (360) are fixedly connected to the outer shell (340) via a front-end support assembly (330); the rear ends of the high-voltage pole (350) and the collecting pole (360) are fixedly connected to the outer shell (340) via a rear-end support assembly (370); The front end support assembly (330) comprises a front end insulating support ring (331) sealingly disposed between the outer circumference of the outer high-pressure barrel (351) and the inner circumference of the outer shell (340); The front end of the front insulating support ring (331) is connected to a pressing plate (333), and a pressing block (333B) is provided on the rear end surface of the pressing plate (333); The front end support assembly (330) further comprises a front end insulating pressure ring (334), the rear end of the front end insulating pressure ring (334) being pressed against the front end of the collector (360), and the front end of the front end insulating pressure ring (334) being connected to the pressure block (333B).

2. The triaxial radiation-resistant ionization chamber sensor according to claim 1, characterized in that The rear end inner wall of the front end insulating support ring (331) has a step for accommodating the front end of the outer high-pressure barrel (351); The side surface of the step has an internal thread, and the outer peripheral surface of the front end of the outer high-pressure barrel (351) has an external thread matching the internal thread.

3. A triaxial radiation-resistant ionization chamber sensor according to claim 1 or 2, characterized in that, The front end of the outer high-pressure barrel (351) is respectively provided with a high-pressure pole connection needle (351A) and a high-pressure limit position rod (351B); An accommodating cavity (331A) is provided on the inner side of the front end insulating support ring (331), and the accommodating cavity (331A) extends from the inner circumference of the front end insulating support ring (331) to the outer circumference; The accommodating cavity (331A) is used to accommodate the high-voltage pole connecting needle (351A) or the high-voltage limit position rod (351B), and the accommodating cavity (331A) for the high-voltage pole connecting needle (351A) penetrates the front end face and the rear end face of the front end insulating support ring (331).

4. The triaxial radiation-resistant ionization chamber sensor according to claim 3, characterized in that, The extension distance of at least one of the accommodating cavities (331A) from the inner circumference of the front end insulating support ring (331) to the outer circumference is greater than the thickness of the outer high-pressure barrel (351).

5. A triaxial radiation-resistant ionization chamber sensor according to claim 1 or 4, characterized in that, The front end of the collector (360) is provided with a collector connection needle (361) and a collector limit rod (362). The front end insulating pressure ring (334) is provided with a clearance hole (334A), and the clearance hole (334A) is used to accommodate the collector connection needle (361) and the collector limit rod (362); The relief hole (334A) for accommodating the collector connection pin (361) penetrates through the front end face and the rear end face of the front end insulating press ring (334).

6. The triaxial radiation-resistant ionization chamber sensor according to claim 5, characterized in that, A press rod (333A) is further provided at the rear end of the press plate (333). A press hole is provided at a position corresponding to the press rod (333A) on the front end insulating press ring (334), and the depth of the press hole is less than the length of the press rod (333A).

7. The triaxial radiation-resistant ionization chamber sensor according to claim 6, wherein, The inner high-voltage barrel (352) is connected to the outer high-voltage barrel (351) through a front end connection and reinforcement pipe (332). The front end of the inner high-voltage barrel (352) has a receiving recess. A through hole for the front end connection and reinforcement pipe (332) to pass through is provided on the collector (360), and a connection hole for fixedly connecting with the front end connection and reinforcement pipe (332) is provided on the outer high-voltage barrel (351).

8. A triaxial radiation-resistant ionization chamber sensor according to claim 1 or 7, characterized in that, The rear end support assembly (370) includes a rear end insulating press ring (373) and a rear end insulating support ring (372). The rear end insulating press ring (373) is connected to the rear end of the collector (360), and the rear end insulating support ring (372) is arranged between the outer high-voltage barrel (351) and the outer shell sleeve (340). The rear end of the rear end insulating support ring (372) and the rear end of the rear end insulating press ring (373) are connected through the rear end plug plate (371). An inner ring and an outer ring are respectively provided on the front end face of the rear end plug plate (371). The inner ring is used for connecting with the rear end insulating press ring (373), and the outer ring is used for connecting with the rear end insulating support ring (372). The rear end support assembly (370) further includes a rear end connection and reinforcement pipe (374), and the rear end connection and reinforcement pipe (374) is used to realize the connection between the inner high-voltage barrel (352) and the outer high-voltage barrel (351).

9. A triaxial radiation-resistant ionization chamber sensor according to claim 8, wherein An air injection through hole is provided on the rear end plug plate (371) and inside the inner ring, and the air injection through hole extends from the front end face of the rear end plug plate (371) to its rear end face. A rear end cover (380) for blocking the air injection through hole is further provided at the rear end of the rear end plug plate (371).

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