Scintillator detection equipment based on photomultiplier

Abstract

The invention relates to the technical field of scintillator detectors, and particularly discloses scintillator detection equipment based on a photomultiplier device, which comprises an electromagnetic shielding shell, a scintillation crystal, a photomultiplier and a rear-end electronic component, the scintillation crystal is arranged in the electromagnetic shielding shell; the photomultiplier is mounted in the electromagnetic shielding shell on one side of the scintillation crystal; the rear-end electronic component is arranged in the electromagnetic shielding shell on one side, far away from the scintillation crystal, of the photomultiplier, and the rear-end electronic component is electrically connected with the photomultiplier; the electromagnetic shielding shell is provided with a beryllium window on the end face of one side of the scintillation crystal away from the photomultiplier. A heat dissipation mechanism capable of dissipating heat in the electromagnetic shielding shell is arranged in the electromagnetic shielding shell; through cooperation of the electromagnetic shielding shell and the heat dissipation mechanism, the equipment has good heat dissipation performance while giving consideration to the electromagnetic shielding effect, and the possibility that the equipment is damaged due to overheating in the long-term use process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of scintillator detectors, and in particular to a scintillator detection device based on a photomultiplier device. Background Art

[0002] As one of the most widely used nuclear radiation detectors, scintillator detectors can detect charged particles or neutral particles, and can meet different physical requirements such as fast time response, high detection efficiency, high sensitivity, high energy resolution and good position resolution. The back end of the scintillation crystal in the scintillator detector is mostly directly connected to the photoelectric device, and the photoelectric device is followed by the back-end electronic components. When the detection environment is in the presence of various electromagnetic phenomena, the electromagnetic signals in the external environment can easily interfere with the equipment, thereby increasing the loss in the light transmission process and reducing the photoelectric conversion efficiency.

[0003] In the existing technology, in order to reduce the interference of external electromagnetic signals on the equipment and reduce the loss during light transmission, the outer shell of the detection equipment is mostly a sealed shell with electromagnetic shielding function. However, during the long-term use of the equipment, the heat dissipation effect of the sealed shell is poor, which can easily cause the equipment to overheat and cause damage. Summary of the Invention

[0004] The present application provides a scintillator detection device based on a photomultiplier device, which has the advantages of ensuring that the device has good heat dissipation performance while taking into account the electromagnetic shielding effect, thereby reducing the possibility of damage to the device due to overheating during long-term use.

[0005] The present application provides a scintillator detection device based on a photomultiplier device, which adopts the following technical solution: A scintillator detection device based on a photomultiplier device comprises an electromagnetic shielding shell, a scintillation crystal, a photomultiplier tube, and rear-end electronic components; the scintillation crystal is mounted inside the electromagnetic shielding shell; the photomultiplier tube is mounted inside the electromagnetic shielding shell on one side of the scintillation crystal; the rear-end electronic components are arranged inside the electromagnetic shielding shell on a side of the photomultiplier tube away from the scintillation crystal, and are electrically connected to the photomultiplier tube; a beryllium window is provided on the end face of the electromagnetic shielding shell on a side of the scintillation crystal away from the photomultiplier tube; and a heat dissipation mechanism is provided inside the electromagnetic shielding shell for dissipating heat inside the electromagnetic shielding shell.

[0006] By adopting the above technical solution, the electromagnetic shielding shell can effectively shield external electromagnetic signals, reduce the possibility of electromagnetic waves in the external environment interfering with optical signal transmission, thereby reducing optical transmission loss during the use of the equipment. When the heat inside the electromagnetic shielding shell is too high, the heat can be quickly dissipated through the heat dissipation mechanism set in the electromagnetic shielding shell, reducing the possibility of damage to the equipment due to overheating during long-term use, and improving the service life of the equipment.

[0007] Preferably, a pair of ventilation ducts connecting the electromagnetic shielding shell with the outside world are provided on the outer wall of the electromagnetic shielding shell; the heat dissipation mechanism includes a pair of rotating shafts and a drive assembly; the pair of rotating shafts are coaxially connected to the inner walls of the two ventilation ducts, and fan blades are provided on the outer walls of the two rotating shafts; the blades of the two fan blades are arranged in opposite rotation directions; the drive assembly is arranged in the electromagnetic shielding shell, and the drive assembly can drive the two rotating shafts to rotate.

[0008] By adopting the above technical solution, when dissipating heat, the driving assembly arranged in the electromagnetic shielding shell drives the two rotating shafts to rotate, causing the fan blades on the two rotating shafts to rotate and draw and exhaust air respectively, thereby increasing the exchange rate between the high-temperature gas in the electromagnetic shielding shell and the external ambient gas, so as to promote the rapid dissipation of heat in the electromagnetic shielding shell.

[0009] Preferably, the drive assembly includes a motor; the motor is installed on the inner wall of the electromagnetic shielding shell, and the output end of the motor is coaxially fixed to the drive shaft; a pair of first bevel gears are coaxially fixed to the outer wall of the drive shaft; the ends of the two rotating shafts away from the fan blades are coaxially fixed with second bevel gears; the two second bevel gears are respectively engaged with the two first bevel gears.

[0010] By adopting the above technical solution, when heat dissipation is performed, the starting motor drives the drive shaft to rotate. Under the engagement of the first bevel gear and the second bevel gear, the drive shaft drives the two rotating shafts to rotate, causing the two fan blades to rotate to draw in and exhaust air respectively.

[0011] Preferably, a temperature sensor and a controller are provided on the inner wall of the electromagnetic shielding shell; the temperature sensor is electrically connected to the controller; and the controller is electrically connected to the motor to control the operation of the motor.

[0012] By adopting the above technical solution, the temperature sensor can detect the temperature inside the electromagnetic shielding shell and transmit data to the controller. When the temperature inside the electromagnetic shielding shell is too high, the controller controls the motor to automatically dissipate the heat inside the electromagnetic shielding shell in a timely manner.

[0013] Preferably, filters are installed on the inner walls of the ends of the pair of ventilation pipes away from the electromagnetic shielding shell.

[0014] By adopting the above technical solution, the filter can block dust and impurities in the external environment, making it difficult for impurities in the external environment to enter the electromagnetic shielding shell through the ventilation pipe, thereby reducing the possibility of dust and impurities interfering with components installed in the electromagnetic shielding shell.

[0015] Preferably, a rotating shaft located in the middle of the two ventilation pipes is rotatably connected to the outer wall of the electromagnetic shielding shell; the rotating shaft is coaxial with the rotation axis, and a brush plate is fixedly connected to the end face of the rotating shaft away from the electromagnetic shielding shell; a cleaning brush that can contact the two filters is provided on the outer wall of the brush plate; a transmission assembly located in the electromagnetic shielding shell is provided at the end of the rotating shaft away from the brush plate; the transmission assembly can enable the drive shaft to drive the rotating shaft to rotate.

[0016] By adopting the above technical solution, the driving shaft can drive the rotating shaft to rotate through the transmission component during the rotation process, so that the cleaning brush set on the brush plate can clean the surface of the filter, reducing the possibility of dust and impurities adhering to the surface of the filter and clogging the mesh holes, thereby ensuring the air permeability of the filter.

[0017] Preferably, the transmission assembly includes a third bevel gear and a fourth bevel gear; the third bevel gear is coaxially fixed to the outer wall of the drive shaft; the fourth bevel gear is coaxially fixed to the end face of the rotating shaft away from the brush plate, and the fourth bevel gear is meshed with the third bevel gear.

[0018] By adopting the above technical solution, during the rotation of the drive shaft, the engagement of the third bevel gear and the fourth bevel gear drives the rotating shaft to rotate, thereby realizing the transmission of kinetic energy of the drive shaft during the rotation process.

[0019] Preferably, the scintillation crystal is provided with electromagnetic shielding glass on a side close to the photomultiplier tube; the electromagnetic shielding glass is located between the scintillation crystal and the photomultiplier tube, and the electromagnetic shielding glass is coupled to the end face of the scintillation crystal using an optical coupling agent.

[0020] By adopting the above technical solution, the electromagnetic shielding glass provided can not only meet the electromagnetic shielding effect, but also the fluorescence generated by the scintillation crystal can be well transmitted to the optoelectronic device. The optical coupling agent provided can exclude the air at the interface, reduce the total reflection of photons at the interface, and enable the light to be effectively transmitted to the optoelectronic device.

[0021] Preferably, the electromagnetic shielding shell is made of aluminum alloy.

[0022] By adopting the above technical solution, the electromagnetic shielding shell made of aluminum alloy not only meets the requirements of good electromagnetic shielding effect, but also has good thermal conductivity and heat dissipation performance, so as to dissipate the heat generated by the electrical components inside the electromagnetic shielding shell.

[0023] Preferably, a plurality of electromagnetic absorption sheets are installed on the inner walls of a pair of the ventilation ducts.

[0024] By adopting the above technical solution, the electromagnetic absorption sheet arranged in the ventilation duct can effectively absorb electromagnetic signals without affecting the air circulation in the ventilation duct, so as to ensure the electromagnetic shielding effect of the electromagnetic shielding shell.

[0025] In summary, this application has the following beneficial effects: 1. The electromagnetic shielding case can effectively shield external electromagnetic signals, reduce the possibility of electromagnetic waves from the external environment interfering with optical signal transmission, and thus reduce optical transmission loss during the use of the device. When the heat inside the electromagnetic shielding case is too high, the heat dissipation mechanism provided in the electromagnetic shielding case can quickly dissipate the heat, thereby reducing the possibility of damage to the device due to overheating during long-term use, thereby increasing the service life of the device, so that the device has good heat dissipation performance while taking into account the electromagnetic shielding effect; 2. The electromagnetic shielding glass placed between the scintillation crystal and the photomultiplier tube not only provides electromagnetic shielding, but also effectively transmits the fluorescence generated by the scintillation crystal to the optoelectronic device. The use of an optical coupling agent to couple the interface between the electromagnetic shielding glass and the scintillation crystal can remove air from the interface, reduce total internal reflection of photons at the interface, and effectively transmit light to the optoelectronic device, further reducing light transmission loss and optimizing photoelectric conversion efficiency. 3. During the rotation process, the driving shaft will drive the rotating shaft to rotate through the meshing cooperation of the third bevel gear and the fourth bevel gear, thereby prompting the cleaning brush set on the brush plate to clean the surface of the filter, reducing the possibility of dust and impurities adhering to the surface of the filter and clogging the mesh, and ensuring the air permeability of the filter so that the heat in the electromagnetic shielding shell can be dissipated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a scintillator detection device based on a photomultiplier device; Figure 2 It is a schematic diagram of the internal structure of the electromagnetic shielding shell in this application; Figure 3 This is a schematic diagram of the coordinated structure of the electromagnetic shielding shell and the heat dissipation mechanism in this application; Figure 4 This is a schematic diagram of the matching structure of the drive assembly and the two rotating shafts in this application; Figure 5 This is a schematic diagram of the transmission matching structure of the drive shaft and the rotating shaft in this application; Figure 6 This is a schematic diagram of the coordinated structure of the ventilation pipe and multiple electromagnetic absorption sheets in this application.

[0027] Explanation of the accompanying drawings: 1. Electromagnetic shielding shell; 11. Beryllium window; 12. Ventilation duct; 121. Filter; 122. Electromagnetic absorption sheet; 13. Temperature sensor; 14. Controller; 15. Rotating shaft; 16. Brush plate; 161. Cleaning brush; 17. Transmission assembly; 171. Third bevel gear; 172. Fourth bevel gear; 2. Scintillator crystal; 21. Electromagnetic shielding glass; 3. Photomultiplier tube; 4. Back-end electronic components; 5. Heat dissipation mechanism; 51. Rotating shaft; 52. Drive assembly; 521. Motor; 522. Drive shaft; 523. First bevel gear; 524. Second bevel gear; 53. Fan blades. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0029] The present invention discloses a scintillator detection device based on a photomultiplier device, such as Figure 1 and Figure 2 As shown, it includes an electromagnetic shielding shell 1, a scintillation crystal 2, an electromagnetic shielding glass 21, a photomultiplier tube 3 and a rear-end electronic component 4. The electromagnetic shielding shell 1 is made of aluminum alloy. A beryllium window 11 is provided on one end face of the electromagnetic shielding shell 1. The scintillation crystal 2 is mounted on the inner wall of the electromagnetic shielding shell 1 close to the beryllium window 11. The electromagnetic shielding glass 21 is mounted on the inner wall of the electromagnetic shielding shell 1 on the side of the scintillation crystal 2 away from the beryllium window 11. The electromagnetic shielding glass 21 is coupled to the end face of the scintillation crystal 2 away from the beryllium window 11 using an optical coupling agent. The photomultiplier tube 3 is mounted on the inner wall of the electromagnetic shielding shell 1 on the side of the electromagnetic shielding glass 21 away from the scintillation crystal 2. The rear-end electronic component 4 is mounted on the inner wall of the electromagnetic shielding shell 1 on the side of the photomultiplier tube 3 away from the electromagnetic shielding glass 21. The rear-end electronic component 4 is electrically connected to the photomultiplier tube 3.

[0030] During the use of the equipment, the electromagnetic shielding shell 1 can shield external electromagnetic waves and reduce the possibility of external electromagnetic waves interfering with the transmission of optical signals. The electromagnetic shielding glass 21 arranged between the scintillation crystal 2 and the photomultiplier tube 3 can not only meet the electromagnetic shielding effect, but also the fluorescence generated by the scintillation crystal 2 can be well transmitted to the optoelectronic device. The optical coupling agent can exclude the air at the interface, thereby reducing the total reflection of photons at the interface, so that light can be effectively transmitted to the optoelectronic device, reducing the light transmission loss of the equipment during use.

[0031] like Figure 3 and Figure 4As shown, a pair of ventilation ducts 12 connecting the external environment and the internal environment of the electromagnetic shielding shell 1 are provided on the outer wall of the electromagnetic shielding shell 1. A heat dissipation mechanism 5 is also provided in the electromagnetic shielding shell 1, which can dissipate the heat in the electromagnetic shielding shell 1 to the external environment through the ventilation ducts 12. The heat dissipation mechanism 5 includes a pair of rotating shafts 51 and a driving assembly 52. ​​The pair of rotating shafts 51 are coaxially connected to the inner walls of the two ventilation ducts 12 through support plates. Fan blades 53 located in the ventilation duct 12 are installed on the outer walls of the two rotating shafts 51. The blades of the fan blades 53 on the two rotating shafts 51 are arranged in opposite rotation directions. The driving assembly 52 is arranged in the electromagnetic shielding shell 1, and the driving assembly 52 can drive the two rotating shafts 51 to rotate.

[0032] When the ambient temperature inside the electromagnetic shielding shell 1 is too high, the driving component 52 drives the two rotating shafts 51 to rotate, causing the fan blades 53 on the two rotating shafts 51 to rotate to draw in and exhaust air respectively, thereby increasing the gas exchange rate between the internal environment of the electromagnetic shielding shell 1 and the external environment, so as to promote the rapid dissipation of heat inside the electromagnetic shielding shell 1 and reduce the possibility of overheating of the equipment during long-term use.

[0033] like Figure 3 and Figure 4 As shown, the drive assembly 52 includes a motor 521, a pair of first bevel gears 523 and a pair of second bevel gears 524. The motor 521 is installed on the inner wall of the electromagnetic shielding shell 1. The output end of the motor 521 is coaxially fixed with the drive shaft 522. The pair of first bevel gears 523 are coaxially fixed to the outer walls of the drive shaft 522 close to the two rotating shafts 51. The pair of second bevel gears 524 are coaxially fixed to the outer walls of the ends of the two rotating shafts 51 close to the drive shaft 522. The two second bevel gears 524 are respectively engaged with the two first bevel gears 523.

[0034] When the starting motor 521 drives the driving shaft 522 to rotate, the driving shaft 522 drives the two rotating shafts 51 to rotate through the engagement of the first bevel gear 523 and the second bevel gear 524, prompting the two fan blades 53 to respectively exhaust and inhale air, thereby quickly dissipating the heat inside the electromagnetic shielding shell 1.

[0035] like Figure 2 and Figure 3 As shown, a temperature sensor 13 and a controller 14 are installed on the inner wall of the electromagnetic shielding shell 1. The temperature sensor 13 can detect the internal ambient temperature of the electromagnetic shielding shell 1. The temperature sensor 13 is electrically connected to the input end of the controller 14, and the output end of the controller 14 is electrically connected to the motor 521. The controller 14 controls the operation of the motor 521.

[0036] The temperature sensor 13 can detect the temperature inside the electromagnetic shielding shell 1 in real time and transmit the detection data to the controller 14. The controller 14 analyzes the received data and controls the motor 521 to perform corresponding work so that when the temperature inside the electromagnetic shielding shell 1 is too high, the motor 521 can respond in time to perform heat dissipation.

[0037] like Figure 3 and Figure 5 As shown, filter screens 121 are installed on the inner walls of the ends of the two ventilation pipes 12 away from the electromagnetic shielding shell 1, and a rotating shaft 15 located in the middle position of the two ventilation pipes 12 is rotatably connected to the outer wall of the electromagnetic shielding shell 1. The rotating shaft 15 is coaxial with the ventilation pipe 12, and a brush plate 16 located outside the filter screen 121 is fixedly connected to the outer wall of the end of the rotating shaft 15 away from the electromagnetic shielding shell 1. A pair of cleaning brushes 161 that can contact the outer surfaces of the two filter screens 121 are provided on the outer wall of the brush plate 16. A transmission assembly 17 located in the electromagnetic shielding shell 1 is provided at the end of the rotating shaft 15 away from the brush plate 16. The transmission assembly 17 can enable the drive shaft 522 to drive the rotating shaft 15 to rotate.

[0038] During the rotation process, the drive shaft 522 will drive the rotating shaft 15 to rotate through the transmission assembly 17, prompting the cleaning brush 161 set on the brush plate 16 to clean the filter 121, reducing the possibility of dust and impurities adhering to the surface of the filter 121 and clogging the mesh, and ensuring the air permeability of the filter 121 to dissipate heat.

[0039] like Figure 3 and Figure 5 As shown, the end of the rotating shaft 15 away from the brush plate 16 passes through the wall of the electromagnetic shielding shell 1 and extends into the interior of the electromagnetic shielding shell 1. The transmission assembly 17 includes a third bevel gear 171 and a fourth bevel gear 172. The third bevel gear 171 is coaxially fixed to the outer wall of the drive shaft 522 close to the rotating shaft 15. The fourth bevel gear 172 is coaxially fixed to the outer wall of the end of the rotating shaft 15 extending into the electromagnetic shielding shell 1. The fourth bevel gear 172 is meshed with the third bevel gear 171.

[0040] Under the meshing cooperation of the third bevel gear 171 and the fourth bevel gear 172 , the driving shaft 522 drives the rotating shaft 15 to rotate during the rotation process, thereby realizing the transmission of kinetic energy during the rotation of the driving shaft 522 and reducing the use of power elements.

[0041] like Figure 3 and Figure 6 As shown, the two ventilation pipes 12 are fixed to multiple electromagnetic absorption sheets 122 on the inner wall of the fan blade 53 near the filter 121. The multiple electromagnetic absorption sheets 122 are arranged in a staggered manner along the axis of the ventilation pipe 12.

[0042] The electromagnetic absorption sheets 122 staggeredly arranged in the ventilation duct 12 at intervals can effectively absorb electromagnetic signals without affecting the normal circulation of gas in the ventilation duct 12, thereby improving the defect of the electromagnetic shielding shell 1 that the electromagnetic shielding effect is reduced due to the arrangement of heat dissipation channels.

[0043] Working principle: When the device is in use, the electromagnetic shielding shell 1 can shield external electromagnetic waves, reduce the possibility of external electromagnetic waves interfering with optical signal transmission, and thus reduce the optical transmission loss of the device during use. The temperature sensor 13 in the electromagnetic shielding shell 1 can detect its internal ambient temperature in real time and transmit the detected data to the controller 14 for analysis and processing. When the internal ambient temperature of the electromagnetic shielding shell 1 is too high, the controller 14 controls the motor 521 to work, and the motor 521 drives the drive shaft 522 to rotate. Under the meshing cooperation of the first bevel gear 523 and the second bevel gear 524, the drive shaft 522 drives the two rotating shafts 51 to rotate, causing the fan blades 53 on the two rotating shafts 51 to rotate to draw and exhaust air respectively, thereby improving the gas exchange rate between the internal environment of the electromagnetic shielding shell 1 and the external environment, thereby causing the internal heat of the electromagnetic shielding shell 1 to be automatically and quickly dissipated, reducing the possibility of overheating of the device during long-term use; During the rotation process, the driving shaft 522 will drive the rotating shaft 15 to rotate through the meshing cooperation of the third bevel gear 171 and the fourth bevel gear 172, prompting the cleaning brush 161 set on the brush plate 16 to clean the filter 121 on the ventilation pipe 12, reducing the possibility of dust and impurities adhering to the surface of the filter 121 and clogging the filter 121, thereby ensuring the air permeability of the filter 121.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A scintillator detection device based on a photomultiplier device, characterized in that: The invention comprises an electromagnetic shielding shell (1), a scintillation crystal (2), a photomultiplier tube (3) and a rear-end electronic component (4); the scintillation crystal (2) is installed inside the electromagnetic shielding shell (1); the photomultiplier tube (3) is installed inside the electromagnetic shielding shell (1) on one side of the scintillation crystal (2); the rear-end electronic component (4) is arranged inside the electromagnetic shielding shell (1) on the side of the photomultiplier tube (3) away from the scintillation crystal (2), and the rear-end electronic component (4) is electrically connected to the photomultiplier tube (3); a beryllium window (11) is provided on the end face of the electromagnetic shielding shell (1) on the side of the scintillation crystal (2) away from the photomultiplier tube (3); and a heat dissipation mechanism (5) capable of dissipating heat inside the electromagnetic shielding shell (1) is provided inside the electromagnetic shielding shell (1).

2. The scintillator detection device based on a photomultiplier device according to claim 1, characterized in that: A pair of ventilation pipes (12) for connecting the electromagnetic shielding shell (1) with the outside world are provided on the outer wall of the electromagnetic shielding shell (1); the heat dissipation mechanism (5) comprises a pair of rotating shafts (51) and a driving assembly (52); the pair of rotating shafts (51) are respectively coaxially connected to the inner walls of the two ventilation pipes (12), and fan blades (53) are provided on the outer walls of the two rotating shafts (51); the blades of the two fan blades (53) are arranged in opposite rotation directions; the driving assembly (52) is provided in the electromagnetic shielding shell (1), and the driving assembly (52) can drive the two rotating shafts (51) to rotate.

3. The scintillator detection device based on a photomultiplier device according to claim 2, characterized in that: The driving assembly (52) includes a motor (521); the motor (521) is mounted on the inner wall of the electromagnetic shielding shell (1), and the output end of the motor (521) is coaxially fixed to the driving shaft (522); a pair of first bevel gears (523) are coaxially fixed to the outer wall of the driving shaft (522); the ends of the two rotating shafts (51) away from the fan blades (53) are coaxially fixed to second bevel gears (524); the two second bevel gears (524) are respectively engaged with the two first bevel gears (523).

4. The scintillator detection device based on a photomultiplier device according to claim 3, characterized in that: A temperature sensor (13) and a controller (14) are provided on the inner wall of the electromagnetic shielding shell (1); the temperature sensor (13) is electrically connected to the controller (14); and the controller (14) is electrically connected to the motor (521) to control the operation of the motor (521).

5. The scintillator detection device based on a photomultiplier device according to claim 3, characterized in that: Filters (121) are installed on the inner walls of the ends of a pair of ventilation pipes (12) away from the electromagnetic shielding shell (1).

6. The scintillator detection device based on a photomultiplier device according to claim 5, characterized in that: A rotating shaft (15) located in the middle of the two ventilation pipes (12) is rotatably connected to the outer wall of the electromagnetic shielding shell (1); the rotating shaft (15) is coaxial with the rotating shaft (51), and a brush plate (16) is fixedly connected to the end surface of the rotating shaft (15) away from the electromagnetic shielding shell (1); a cleaning brush (161) that can contact the two filter screens (121) is provided on the outer wall of the brush plate (16); a transmission assembly (17) located in the electromagnetic shielding shell (1) is provided at the end of the rotating shaft (15) away from the brush plate (16); the transmission assembly (17) can enable the driving shaft (522) to drive the rotating shaft (15) to rotate.

7. The scintillator detection device based on a photomultiplier device according to claim 6, characterized in that: The transmission assembly (17) comprises a third bevel gear (171) and a fourth bevel gear (172); the third bevel gear (171) is coaxially fixed to the outer wall of the drive shaft (522); the fourth bevel gear (172) is coaxially fixed to the end face of the rotating shaft (15) away from the brush plate (16), and the fourth bevel gear (172) is meshed with the third bevel gear (171).

8. The scintillator detection device based on a photomultiplier device according to claim 1, characterized in that: An electromagnetic shielding glass (21) is installed on a side of the scintillation crystal (2) close to the photomultiplier tube (3); the electromagnetic shielding glass (21) is located between the scintillation crystal (2) and the photomultiplier tube (3), and the electromagnetic shielding glass (21) is coupled to the end face of the scintillation crystal (2) using an optical coupling agent.

9. The scintillator detection device based on a photomultiplier device according to claim 1, characterized in that: The electromagnetic shielding shell (1) is made of aluminum alloy.

10. The scintillator detection device based on a photomultiplier device according to claim 2, characterized in that: A plurality of electromagnetic absorption sheets (122) are installed on the inner walls of a pair of ventilation pipes (12).

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