A normal pressure channel irradiation device with autonomous rotation function

Abstract

The present invention relates to the field of research reactor material irradiation technology, and specifically to a normal-pressure channel irradiation device with autonomous rotation capability. The device comprises a remote terminal and a sequentially connected positioning section, a protective tube, and a test section. The positioning section is configured to mate with the normal-pressure channel opening, and comprises a drive shaft, a limit ring assembly, a power transmission assembly, a servo motor, and a controller. The limit ring assembly is sleeved on the drive shaft, the servo motor is mounted laterally to the drive shaft, the controller is electrically connected to the servo motor, the remote terminal is communicatively connected to the controller, the power transmission assembly comprises a drive shaft gear and a motor gear meshing with the drive shaft gear, the drive shaft gear is coaxially keyed to the drive shaft, the motor gear is coaxially keyed to the output shaft of the servo motor, and lead pipes are provided axially along the protective tube and the drive shaft. The present invention utilizes a servo motor for remote control to achieve autonomous rotation of the irradiation device carrying the test piece, thereby improving the accuracy and reliability of the test results.

Description

Technical Field

[0001] The present invention relates to the technical field of research reactor material irradiation, and in particular to a normal pressure channel irradiation device with an autonomous rotation function. Background Art

[0002] In recent years, the domestic nuclear industry has experienced rapid growth. With the vigorous promotion of domestic production of reactors and their supporting components, the demand for various new nuclear materials and in-core detectors has become increasingly urgent. Before these new materials and in-core detectors are put into use, their physical, chemical, and reliability tests must be conducted in research reactors. When a test piece enters a research reactor for irradiation testing, the irradiation device, acting as the carrier for the test piece, not only meets the research reactor's interface requirements but also allows the test piece to be clamped in a specific pattern to meet the requirements of in-core irradiation testing.

[0003] Currently, the material irradiation device used in research reactors is primarily mounted on the reactor top flange during irradiation testing. Due to the reactor's structural characteristics, half of the test specimens within the device face the core, while the other half face away from it. This mounting arrangement results in uneven neutron flux and temperature distribution within the test specimens.

[0004] To address this issue, during irradiation tests across multiple furnace sections, operators manually rotate the irradiator during the shutdown and cooling intervals to ensure consistent cumulative neutron doses for the test pieces. However, this solution has significant shortcomings. If a test piece is irradiated for an odd number of furnace sections, the neutron dose will inevitably vary, affecting the accuracy of the irradiation test results and failing to meet current standards for refined irradiation test control.

[0005] Therefore, in view of the shortcomings of the existing irradiation device, a new irradiation device needs to be designed to solve the problem of uneven neutron flux and temperature distribution of the test piece in the irradiation device. Summary of the Invention

[0006] The purpose of the present invention is to provide a normal-pressure channel irradiation device with an autonomous rotation function to solve the problem of uneven radial neutron flux and temperature distribution of the irradiation device. A servo motor is used for driving, and the test piece is remotely controlled to realize autonomous rotation in the normal-pressure channel along with the irradiation device, thereby ensuring that the test piece receives uniform neutron flux and maintains uniform temperature during the in-pile irradiation test process, thereby improving the accuracy and reliability of the test results.

[0007] The present invention is achieved through the following technical solutions: a normal pressure channel irradiation device with an autonomous rotation function, comprising a distal terminal and a positioning section, a protective tube, and a test section connected in sequence, wherein the positioning section is configured to cooperate with the normal pressure channel opening to retain the protective tube and the test section within the normal pressure channel, and the test section is configured to carry a test piece;

[0008] The positioning section includes a transmission shaft, a first flange, a limiting ring assembly, a second flange, a power transmission assembly, a third flange, a servo motor and a controller. The first flange is arranged on the transmission shaft and is connected to the protective tube. The limiting ring assembly is installed at the first end of the second flange to limit the rotation angle of the transmission shaft. The shape of the second flange is adapted to the normal pressure channel opening and is coaxially clearance-matched with the transmission shaft. The servo motor is installed on the side of the transmission shaft through the third flange. The controller is electrically connected to the servo motor, and the remote terminal is communicatively connected to the controller. The power transmission assembly includes a transmission shaft gear and a motor gear meshing with the transmission shaft gear. The transmission shaft gear is coaxially keyed to the transmission shaft, and the motor gear is coaxially keyed to the output shaft of the servo motor.

[0009] A lead pipeline is provided in the axial direction of the protection tube and the transmission shaft.

[0010] According to a preferred embodiment, the limiting ring assembly includes a limiting outer ring, a limiting ring and a limiting inner ring, the limiting outer ring is fixedly connected to the second flange, and the limiting inner ring is fixedly connected to the transmission shaft;

[0011] In which, a fan-shaped groove is provided on the inner side of the limiting outer ring, the outer diameter of the limiting ring is adapted to the inner diameter of the limiting outer ring, a first protrusion is provided on the outer side of the limiting ring and a second protrusion is provided on the inner side, the first protrusion is embedded in the fan-shaped groove, the limiting inner ring is composed of an annular base and an annular boss, the annular base and the annular boss are integrally formed, the outer diameter of the annular base is larger than the inner diameter of the limiting ring, the outer side of the annular boss is provided with a third protrusion, the outer diameter of the third protrusion is adapted to the inner diameter of the limiting ring.

[0012] According to a preferred embodiment, it also includes a manual rod and a manual rod gear, the manual rod is installed on the side of the transmission shaft through a third flange, and the manual rod gear is coaxially keyed to the first end of the manual rod and meshes with the transmission shaft gear.

[0013] According to a preferred embodiment, a bearing mounting hole is provided on the third flange, a deep groove ball bearing is provided in the bearing mounting hole, and the first end of the manual rod is interference fit with the inner ring of the deep groove ball bearing.

[0014] According to a preferred embodiment, the second end of the manual rod is axially connected to a rotating sleeve.

[0015] According to a preferred embodiment, a bearing box is installed at the second end of the second flange, an angular contact ball bearing is installed in the bearing box, and the transmission shaft is interference fit with the inner ring of the angular contact ball bearing.

[0016] According to a preferred embodiment, a scale plate is coaxially mounted on the transmission shaft, and the scale plate is arranged between the second flange and the third flange.

[0017] According to a preferred embodiment, it further includes a plurality of support columns arranged parallel to the central axis of the transmission shaft, wherein the first end of the support column is connected to the second flange, and the second end of the support column is connected to the third flange.

[0018] According to a preferred embodiment, a motor protection cover is further included, the servo motor is installed in the motor protection cover, and a shielding layer is provided outside the motor protection cover and / or the second flange.

[0019] According to a preferred embodiment, a lifting lug is connected to the motor protective cover.

[0020] The technical solution of a normal pressure channel irradiation device with an autonomous rotation function provided by the present invention has at least the following advantages and beneficial effects: (1) The present invention can be used to carry out material irradiation tests in the normal pressure channel of a research reactor, and the autonomous rotation function of the irradiation device carrying the test piece can be realized by adopting a servo motor remote control method; (2) During the rotation of the irradiation device of the present invention, gear transmission is adopted for power transmission with the servo motor, so that the autonomous rotation function of the irradiation device has higher precision; (3) The rotation function of the irradiation device of the present invention can be realized by manual control, and during the debugging process of the irradiation device, the rotation accuracy of the device can be verified by manual control method; (4) The forward and reverse rotation of the transmission shaft is controlled by the servo motor, and the transmission shaft is limited by the limit ring assembly, and the protection tube and the internal wiring of the transmission shaft are combined to reduce the risk of the leads of the detector on the test section being entangled inside the device during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure of a normal-pressure channel irradiation device with an autonomous rotation function provided in Example 1 of the present invention;

[0022] Figure 2 A schematic structural diagram of a positioning segment provided in Example 1 of the present invention;

[0023] Figure 3 A schematic structural diagram of a limit ring assembly provided in Example 2 of the present invention;

[0024] Figure 4 A schematic diagram of the structure of the limiting inner ring provided in Example 2 of the present invention;

[0025] Figure 5 A schematic diagram of the structure of a limit ring provided in Example 2 of the present invention;

[0026] Figure 6 A schematic diagram of the structure of the limiting outer ring provided in Example 2 of the present invention;

[0027] Figure 7 A schematic diagram of the transmission shaft structure provided in Example 1 of the present invention;

[0028] Figure 8 A schematic diagram of the positioning flange structure provided in Example 1 of the present invention;

[0029] Figure 9 A schematic diagram of the motor flange structure provided in Example 3 of the present invention;

[0030] Figure 10 A schematic diagram of the structure of a motor protection cover provided in Example 1 of the present invention;

[0031] Figure 11 A schematic diagram of the structure of a dial provided in Example 1 of the present invention;

[0032] Figure 12 A schematic diagram of the motor gear structure provided in Example 1 of the present invention;

[0033] Figure 13 A schematic diagram of the manual lever structure provided in Example 3 of the present invention;

[0034] Figure 14 A schematic diagram of the test section structure provided in Example 1 of the present invention;

[0035] Figure 15 A schematic diagram of the structure of a rotating sleeve provided in Example 3 of the present invention;

[0036] Icons: 1-sealing head assembly, 2-positioning section, 21-protection tube flange, 22-drive shaft flange, 23-limiting ring assembly, 2301-limiting outer ring, 2302-limiting ring, 2303-limiting inner ring, 24-positioning flange, 25-bearing box, 26-angular contact ball bearing, 27-bearing box cover, 28-dial, 29-manual rod gear, 210-motor flange, 211-manual rod bearing cover, 212-deep groove ball bearing, 213-manual rod, 214-rotating sleeve, 215-drive shaft, 216-lifting ear, 217-motor protection cover, 218-servo motor, 219-drive shaft gear, 220-motor gear, 221-support column, 3-protective tube, 4-test section. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Example 1

[0039] Figure 1 This is a structural diagram of a normal pressure channel irradiation device with autonomous rotation function provided by an embodiment of the present invention. Figure 1 As shown, the normal pressure channel irradiation device consists of four parts, namely a sealing head assembly 1, a positioning section 2, a protection tube 3 and a test section 4. The sealing head assembly 1, the positioning section 2, the protection tube 3 and the test section 4 are connected in sequence.

[0040] In this embodiment, the positioning section 2 is configured to cooperate with the opening of the atmospheric pressure channel. When the irradiation device is installed, the positioning section 2 is placed on the "bell mouth" of the atmospheric pressure channel of the research reactor to keep the protection tube 3 and the test section 4 inside the atmospheric pressure channel; the test section 4 is configured to carry the test piece, such as the test material and the detector for detecting the test temperature; the protection tube 3 is a long tube with an outer diameter smaller than the inner diameter of the atmospheric pressure channel, and is used to lead out the cable of the detector on the test section 4, such as the cable of the thermocouple used to measure the temperature of the test piece.

[0041] Among them, the positioning section 2 is the core component of the irradiation device to achieve the autonomous rotation function, see Figure 2 As shown, the positioning section 2 includes a transmission shaft 215 , a first flange, a limiting ring assembly 23 , a second flange, a power transmission assembly, a third flange and a servo motor 218 .

[0042] See also Figure 7 As shown, the transmission shaft 215 is a stepped shaft with a central opening, which can be divided into four sections, connecting the inside and outside parts of the irradiation device respectively.

[0043] The first flange is arranged on the transmission shaft 215 and is connected to the protective tube 3; in this embodiment, the first flange refers to the protective tube flange 21 connected to the protective tube 3 and the transmission shaft 215 flange 22 connected to the transmission shaft 215. After the protective tube 3 is welded to the protective tube flange 21, it is fixed to the transmission shaft 215 flange 22 by bolt connection, and the transmission shaft 215 flange 22 is welded and fixed to the first section end of the transmission shaft 215.

[0044] The limiting ring assembly 23 is installed at the first end of the second flange, and is used to limit the rotation angle of the transmission shaft 215. In conjunction with the servo motor 218, the transmission shaft 215 is limited to a forward and reverse rotation between 0° and 360°, thereby reducing the risk of the leads of the detector on the test section 4 getting entangled inside the device during rotation.

[0045] The second flange, namely the positioning flange 24, has an outer shape that matches the normal pressure channel opening and is coaxially fitted with the transmission shaft 215; Figure 8 As shown, the first end of the positioning flange 24 is provided with a conical surface in the circumference, which is adapted to the "bell mouth" of the normal pressure channel in the research reactor; the second end of the positioning flange 24 is installed with a bearing box 25, and the bearing box 25 is fixed to the positioning flange 24 by screws; an angular contact ball bearing 26 is installed in the bearing box 25, and the transmission shaft 215 and the inner ring of the angular contact ball bearing 26 have an interference fit to ensure that the transmission shaft 215 and the inner ring of the angular contact ball bearing 26 do not produce relative movement during rotation; a lead shielding layer is provided on the outside of the positioning flange 24 to reduce the impact of radiation radiation in the normal pressure channel on the servo motor 218.

[0046] The third flange is the motor flange 210. The servo motor 218 is fixed to the motor flange 210 by threaded connection, thereby installing the servo motor 218 on the side of the transmission shaft 215. In this embodiment, it also includes a plurality of support columns 221 arranged parallel to the central axis of the transmission shaft 215. The first end of the support column 221 is connected to the positioning flange 24, and the second end of the support column 221 is connected to the motor flange 210. After the motor flange 210 is installed, see Figure 10 As shown, this embodiment also installs a motor protection cover on the outside of the servo motor 218 to prevent failure caused by collision during use; a lead shielding layer is provided on the outside of the motor protection cover to protect the servo motor 218 in a radiation environment. In addition, a lifting ear 216 is connected to the motor protection cover to facilitate the removal of the irradiation device from the normal pressure channel.

[0047] The transmission shaft 215 is coaxially mounted with a scale plate 28, which is disposed between the positioning flange 24 and the motor flange 210. Figure 11 In this embodiment, the second section of the transmission shaft 215 is assembled with a pair of angular contact ball bearings 26, a scale plate 28, and a transmission shaft gear 219. After the scale plate 28 is assembled with the second section of the transmission shaft 215, it is fixed to the transmission shaft 215 using screws, allowing the scale plate 28 and the transmission shaft 215 to rotate synchronously. The weight of the test section 4 and the protective tube 3 is transferred to the angular contact ball bearing 26 via the transmission shaft 215. The fourth section of the transmission shaft 215 has an interference fit with the inner ring of the corresponding through hole in the motor flange 210, thereby supporting the transmission shaft 215 during rotation and ensuring its rotational accuracy.

[0048] The power transmission assembly includes a transmission shaft gear 219 and a motor gear 220 meshing with the transmission shaft gear 219. The transmission shaft gear 219 is arranged on the third section of the transmission shaft 215. The transmission shaft gear 219 is coaxially keyed to the transmission shaft 215. The motor gear 220 is coaxially keyed to the output shaft of the servo motor 218 to ensure assembly reliability. Figure 12 As shown. During the irradiation test, the power transmission assembly transmits power from the servo motor 218, located on the side of the transmission shaft 215, to the transmission shaft 215, driving the test section 4 to rotate. This not only enables the irradiation device to rotate autonomously, but also ensures a high degree of precision in this autonomous rotation. Furthermore, the servo motor 218 can be remotely controlled, for example by configuring a controller that is electrically connected to the servo motor 218, and enabling remote control of the servo motor 218 by communicating with the controller. This will not be elaborated upon here.

[0049] A guide pipe is provided in the axial direction of the protection tube 3 and the transmission shaft 215. Preferably, the straightness of the protection tube 3 is not greater than 2 mm, and the wall thickness of the protection tube 3 is not less than 5 mm to ensure the rotation accuracy of the irradiation device.

[0050] See also Figure 14 As shown, the structure of the test section 4 is a closed tank, and the internal detector lead passes through the lead pipeline opened by the protective tube 3 and the transmission shaft 215 in sequence, and is led out from the first end of the transmission shaft 215; in addition, when the test piece needs to be isolated from water, silver brazing can be used to seal the end of the lead outlet of the transmission shaft 215 and the upper end of the test section 4.

[0051] A limit plate is provided at the lower end of the test section 4, which is used to limit the central position of the irradiation device in the normal pressure channel; specifically, the outer diameter of the limit plate is smaller than the inner diameter of the normal pressure channel and a hole is opened in the middle; the outer end surface of the limit plate is arc-shaped to prevent the irradiation device from getting stuck in the normal pressure channel when radial displacement occurs.

[0052] After the detector lead of the sealing head assembly 1 passes through the lead pipeline on the test section 4, it is welded to the end of the first section of the transmission shaft 215. While realizing the sealing function of the irradiation device, the lead position can be fixed secondary to reduce the risk of the lead being entangled inside the device during the rotation of the test section 4.

[0053] Example 2

[0054] This embodiment is based on the technical solution provided in Example 1 and further describes the limiting ring assembly 23:

[0055] See also Figure 3As shown, in this embodiment, the limit ring assembly 23 serves as a protective measure for the irradiation device. When the control system of the servo motor 218 fails, the limit ring assembly 23 prevents the transmission shaft 215 from rotating beyond the limit. Specifically, the limit ring assembly 23 includes an outer limit ring 2301, a limit ring 2302, and an inner limit ring 2303. The outer limit ring 2301 is fixedly connected to the positioning flange 24, and the inner limit ring 2303 is fixedly connected to the transmission shaft 215.

[0056] Among them, see Figure 6 As shown, a fan-shaped groove is provided on the inner side of the limiting outer ring 2301, and the outer diameter of the limiting ring 2302 is adapted to the inner diameter of the limiting outer ring 2301; Figure 5 As shown, the outer side of the limiting ring 2302 is provided with a first protrusion and the inner side is provided with a second protrusion, and the first protrusion is embedded in the fan-shaped groove; see Figure 4 As shown, the limiting inner ring 2303 is composed of an annular base and an annular boss, and the annular base and the annular boss are integrally formed. The outer diameter of the annular base is larger than the inner diameter of the limiting ring 2302. A third protrusion is provided on the outer side of the annular boss, and the outer diameter of the third protrusion is adapted to the inner diameter of the limiting ring 2302.

[0057] It should be noted that when the inner limit ring 2303 rotates clockwise with the transmission shaft 215, after one rotation, the third protrusion will drive the limit ring 2302 to rotate. When the inner limit ring 2303 and the limit ring 2302 continue to rotate by a preset angle, for example 10°, the rotation of the first protrusion on the limit ring 2302 will be terminated by the fan-shaped groove on the outer limit ring 2301 to ensure that the rotation angle of the transmission shaft 215 does not exceed the design range.

[0058] Example 3

[0059] This embodiment is based on the technical solution provided in Example 1, and further includes a mechanism for manually controlling the rotation of the irradiation device, which is further described below:

[0060] In this embodiment, the mechanism for manually controlling the rotation of the irradiation device includes a manual rod 213, a deep groove ball bearing 212, and a manual rod gear 29. The manual rod 213 is installed on the side of the transmission shaft 215 through the motor flange 210. Figure 13 shown.

[0061] See also Figure 9As shown, in this embodiment, the motor flange 210 is provided with three holes corresponding to the manual rod 213, the transmission shaft 215 and the output shaft of the servo motor 218, and the spacing of the three holes is distributed according to the center distance of the manual rod gear 29, the transmission shaft gear 219 and the motor gear 220; wherein, a hole opened on the motor flange 210 is used as a bearing mounting hole, the deep groove ball bearing 212 is arranged in the bearing mounting hole and the outer ring is interference fit with the bearing mounting frame, the first end of the manual rod 213 is interference fit with the inner ring of the deep groove ball bearing 212 and is coaxially keyed with the manual rod gear 29, and the manual rod gear 29 is meshed with the transmission shaft gear 219.

[0062] In this embodiment, the manual rod 213 is axially fixed by using a manual rod bearing cover 211 fixed to the outside of the bearing mounting hole, and the end of the manual rod 213 is fixed by screws after key connection.

[0063] See also Figure 15 As shown, the second end of the manual rod 213 is axially connected to the rotating sleeve 214, and the rotating sleeve 214 is fixed to the second end of the manual rod 213 by screws. During the debugging stage of the irradiation device, the rotating sleeve 214 can be rotated to drive the transmission shaft 215 to rotate through the manual rod 213 and the manual rod gear 29 to detect the rotation accuracy of the irradiation device.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A normal pressure channel irradiation device with autonomous rotation function, characterized in that: The invention comprises a remote terminal and a positioning section (2), a protective tube (3) and a test section (4) connected in sequence, wherein the positioning section (2) is configured to cooperate with the opening of the normal pressure channel to keep the protective tube (3) and the test section (4) inside the normal pressure channel, and the test section (4) is configured to carry a test piece; The positioning section (2) comprises a transmission shaft (215), a first flange, a limiting ring assembly (23), a second flange, a power transmission assembly, a third flange, a servo motor (218) and a controller. The first flange is arranged on the transmission shaft (215) and connected to the protective tube (3). The limiting ring assembly (23) is installed at the first end of the second flange and is used to limit the rotation angle of the transmission shaft (215). The shape of the second flange is adapted to the normal pressure channel opening and is coaxially clearance-matched with the transmission shaft (215). The servo motor (218) is installed on the side of the transmission shaft (215) through the third flange. The controller is electrically connected to the servo motor (218). The remote terminal is communicatively connected to the controller. The power transmission assembly comprises a transmission shaft gear (219) and a motor gear (220) meshing with the transmission shaft gear (219). The transmission shaft gear (219) is coaxially key-connected to the transmission shaft (215). The motor gear (220) is coaxially key-connected to the output shaft of the servo motor (218). A lead pipeline is provided in the axial direction of the protection tube (3) and the transmission shaft (215).

2. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 1, characterized in that: The limiting ring assembly (23) comprises a limiting outer ring (2301), a limiting ring (2302) and a limiting inner ring (2303), wherein the limiting outer ring (2301) is fixedly connected to the second flange, and the limiting inner ring (2303) is fixedly connected to the transmission shaft (215); In which, a fan-shaped groove is provided on the inner side of the limiting outer ring (2301), the outer diameter of the limiting ring (2302) is adapted to the inner diameter of the limiting outer ring (2301), the outer side of the limiting ring (2302) is provided with a first protrusion and the inner side is provided with a second protrusion, the first protrusion is embedded in the fan-shaped groove, the limiting inner ring (2303) is composed of an annular base and an annular boss, the annular base and the annular boss are integrally formed, the outer diameter of the annular base is larger than the inner diameter of the limiting ring (2302), the outer side of the annular boss is provided with a third protrusion, the outer diameter of the third protrusion is adapted to the inner diameter of the limiting ring (2302).

3. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 1, characterized in that: The invention also includes a manual rod (213) and a manual rod gear (29). The manual rod (213) is installed on the side of the transmission shaft (215) through a third flange. The manual rod gear (29) is coaxially keyed to the first end of the manual rod (213) and meshes with the transmission shaft gear (219).

4. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 3, characterized in that: A bearing mounting hole is provided on the third flange, a deep groove ball bearing (212) is provided in the bearing mounting hole, and the first end of the manual rod (213) is interference-fitted with the inner ring of the deep groove ball bearing (212).

5. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 3, characterized in that: The second end of the manual rod (213) is axially connected to a rotating sleeve (214).

6. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 1, characterized in that: A bearing box (25) is installed at the second end of the second flange, an angular contact ball bearing (26) is installed in the bearing box (25), and the transmission shaft (215) is interference-fitted with the inner ring of the angular contact ball bearing (26).

7. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 1, characterized in that: A scale plate (28) is coaxially mounted on the transmission shaft (215), and the scale plate (28) is arranged between the second flange and the third flange.

8. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 1, characterized in that: It also includes a plurality of support columns (221) arranged parallel to the central axis of the transmission shaft (215), wherein the first end of the support column (221) is connected to the second flange, and the second end of the support column (221) is connected to the third flange.

9. The atmospheric pressure channel irradiation device with autonomous rotation function according to claim 1, characterized in that: It also includes a motor protection cover, the servo motor (218) is installed in the motor protection cover, and a shielding layer is provided outside the motor protection cover and / or the second flange.

10. The normal pressure channel irradiation device with autonomous rotation function according to claim 9, characterized in that: The motor protection cover is connected with a lifting lug (216).

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