A magnetic shielding sleeve for end-window type photomultiplier tube

Abstract

The present application relates to the technical field of photomultiplier tubes, and in particular to a magnetic shielding sleeve for an end-window type photomultiplier tube, which comprises a base, a sleeve is arranged at the upper end of the base, the sleeve is a high-magnetic-permeability nickel-iron alloy sheet, a pin is arranged at the lower end of the base, a protective shell is arranged on the outer side of the sleeve, and a quick-release assembly is arranged between the protective shell and the base. The utility model is provided with a high-magnetic-permeability nickel-iron alloy sheet, the nickel alloy has good oxidation resistance, can work stably at high temperatures, the nickel alloy has good high-temperature strength and high-temperature creep resistance, has good application effect at high temperatures, and achieves the effect of improving the performance of the device. The base and the protective shell component can be conveniently connected through the cooperation between the ball component, the slide component and the drive block component, thereby greatly improving the practicality of the device.

Description

Technical Field

[0001] The present application relates to the technical field of photomultiplier tubes, and in particular to a magnetic shielding sleeve for an end-window type photomultiplier tube. Background Art

[0002] Photomultiplier tubes are vacuum electronic devices that convert weak light signals into electrical signals. Photomultiplier tubes are used in optical measuring instruments and spectral analysis instruments.

[0003] Through searching, Chinese patent announcement number CN214068689U discloses CN214068689U. The utility model protects the photomultiplier tube through the mutual cooperation of the protective cover, the through groove, the slide bar, the movable plate, the buffer spring, the limit plate, the pull block, the connecting plate, the card block, the card groove, the stopper, the slide bar and the slider. When the photomultiplier tube is not in use or moved, it can avoid the phenomenon of collision with external objects and thus damage, and avoid affecting the accuracy of the photomultiplier tube during detection. Moreover, the protective cover is easy to disassemble, which brings great convenience to the user.

[0004] With respect to the above-mentioned related technologies, the inventors found the following defects: However, common photomultiplier tubes are made of glass materials, and the performance of the photomultiplier tubes is poor. At the same time, it is not convenient to remove the transparent cover of the protective shell of the photomultiplier tube, which greatly reduces the practicality and brings great inconvenience to the users. Utility Model Content

[0005] In order to improve the practicability of the device, the present application provides a magnetic shielding sleeve for an end-window type photomultiplier tube.

[0006] The present application provides a magnetic shielding sleeve for an end-window type photomultiplier tube, which adopts the following technical solution: it includes a base, a sleeve is arranged on the upper end of the base, the sleeve is a high magnetic permeability nickel-iron alloy sheet, a pin is arranged on the lower end of the base, a protective shell is arranged on the outside of the sleeve, and a quick-release assembly is arranged between the protective shell and the base.

[0007] Optionally, the quick-release assembly includes a slide cylinder, the slide cylinder is sleeved on the protective shell, a driving block is arranged on the inner side of the slide cylinder, a ball bearing is arranged on the protective shell, a fixing groove is arranged on the base, and a reset assembly is arranged between the sleeve and the protective shell.

[0008] Optionally, the reset assembly includes a spring, one end of the spring is arranged on the driving block, and the other end of the spring is arranged on the protective shell.

[0009] Optionally, a slide groove is provided on the protective shell, the driving block is slidably disposed in the slide groove, and the spring is sleeved on the slide groove.

[0010] Optionally, a guide groove is horizontally arranged on the protective shell, and the ball is slidably arranged in the guide groove. A plurality of the balls are arranged, and the plurality of the balls are evenly distributed.

[0011] Optionally, a limiting plate is disposed on the outer side of the base, a limiting groove is disposed on the inner side of the protective shell, and the limiting plate and the limiting groove are slidably disposed.

[0012] Optionally, the limiting plate is configured to be in an "L" shape, a positioning groove is provided at the lower end of the limiting groove, and the limiting groove is connected to the positioning groove.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. The utility model is provided with a high magnetic permeability nickel-iron alloy sheet. The nickel alloy has good oxidation resistance and can work stably at high temperatures. The nickel alloy has good high temperature strength and high temperature creep resistance and has a good application effect at high temperatures, thereby achieving the effect of improving the performance of the device. The ball component, the slide component and the drive block component cooperate with each other, so that the base and the protective shell component can be conveniently connected, greatly improving the practicality of the device.

[0015] 2. The utility model is provided with components such as a slide groove, a spring, and a limit plate. During the working process, the slide groove and the spring component cooperate with each other, so as to drive the slide cylinder to slide on the protection and limit the moving direction of the slide cylinder. The limit plate component and the limit groove cooperate with each other, so as to limit the position of the protective shell and prevent the protective shell from rotating on the base. The position of the limit groove is prompted by the positioning groove, so as to facilitate the connection between the limit plate and the limit groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of an embodiment of the present application;

[0017] Figure 2 This is an embodiment of the present application Figure 1 The enlarged schematic diagram at A in the middle;

[0018] Figure 3 This is a schematic diagram of the protective shell structure in an embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure numerals: 1. base; 2. sleeve; 3. pin; 4. high magnetic permeability nickel-iron alloy sheet; 5. protective shell; 6. fixing groove; 7. slide cylinder; 8. driving block; 9. slide groove; 10. spring; 11. ball; 12. guide groove; 13. limit plate; 14. limit groove; 15. positioning groove. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0022] The present application embodiment discloses a magnetic shielding sleeve for an end-window type photomultiplier tube. Figure 1 As shown, it includes a base 1, a sleeve 2 is arranged on the upper end of the base 1, and the sleeve 2 is a high magnetic permeability nickel-iron alloy sheet 4. The nickel alloy has excellent corrosion resistance, especially in harsh environments such as high temperature and high pressure, it has excellent stability. The nickel alloy also has good oxidation resistance and can work stably at high temperature. At the same time, the nickel alloy has good high temperature strength and high temperature creep resistance, which greatly improves the practicality of the device.

[0023] See also Figure 1 , Figure 4 As shown, a pin 3 is provided at the lower end of the base 1, a protective shell 5 is provided on the outside of the sleeve 2, a limiting plate 13 is provided on the outside of the base 1, the limiting plate 13 is set in an "L" shape, and a positioning groove 15 is provided at the lower end of the limiting groove 14. When the protective shell 5 is connected to the base 1, the positioning groove 15 can be used to position the position between the limiting plate 13 to achieve convenient connection between the base 1 and the protective shell 5.

[0024] See also Figure 1 , Figure 3 As shown, a limiting groove 14 is arranged on the inner side of the protective shell 5, the limiting groove 14 is connected with the positioning groove 15, the limiting plate 13 is slidingly arranged with the limiting groove 14, and the limiting plate 13 is restricted on the base 1 to prevent the protective shell 5 from rotating on the base 1, and a quick release assembly is arranged between the protective shell 5 and the base 1, and the quick release assembly includes a slide cylinder 7.

[0025] See also Figure 1 , Figure 2 , Figure 3 As shown, the slide 7 is sleeved on the protective shell 5, a driving block 8 is arranged on the inner side of the slide 7, a ball 11 is arranged on the protective shell 5, a guide groove 12 is horizontally arranged on the protective shell 5, and the ball 11 is slidably arranged in the guide groove 12. The moving direction of the ball 11 is limited by the guide groove 12 to improve the stability of the movement of the ball 11. The ball 11 is pushed to slide in the guide groove 12 by the driving block 8, and the position of the ball 11 is limited by one side of the driving block 8 to prevent the ball 11 from sliding.

[0026] See also Figure 1 , Figure 3 As shown, a plurality of balls 11 are provided, and the plurality of balls 11 are evenly distributed, so that the force between the base 1 and the protective shell 5 is evenly applied, thereby improving the connection stability between the protective shell 5 and the base 1. A fixing groove 6 is provided on the base 1, and a reset assembly is provided between the sleeve 2 and the protective shell 5, and the reset assembly includes a spring 10.

[0027] See also Figure 1 , Figure 2 As shown, one end of the spring 10 is arranged on the driving block 8, and the other end is arranged on the protective shell 5. The protective shell 5 is provided with a slide groove 9. When the slide cylinder 7 moves, the slide cylinder 7 drives the driving block 8 to compress and accumulate force on the spring 10, and the spring 10 releases the force to push the driving block 8 to reset. The driving block 8 is slidably arranged in the slide groove 9, and the spring 10 is sleeved on the slide groove 9.

[0028] The implementation principle of a magnetic shielding sleeve for an end-window type photomultiplier tube in an embodiment of the present application is as follows: the high magnetic permeability nickel-iron alloy sheet 4 has good corrosion resistance and heat resistance, especially in harsh environments such as high temperature and high pressure, and has excellent stability to improve the practicability of the device. When the protective shell 5 needs to be removed, the staff drives the slide 7 to slide on the protective shell 5. While the slide 7 moves, it drives the drive block 8 to follow the movement and compresses the spring 10. When the drive block 8 is separated from the ball 11, the protective shell 5 is lifted up. The protective shell 5 drives the ball 11 to follow the movement and drives the ball 11 to move toward the slide 7 under the action of the fixing groove 6, thereby conveniently releasing the fixation. The staff reverses the operation and aligns the positioning groove 15 with the limit plate 13, so that the protective shell 5 can be quickly connected to the base 1.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic shielding sleeve for an end-window type photomultiplier tube, comprising a base (1), characterized in that: The upper end of the base (1) is provided with a sleeve (2), the sleeve (2) is a high-magnetic-permeability nickel-iron alloy sheet (4), the lower end of the base (1) is provided with a pin (3), the outer side of the sleeve (2) is provided with a protective shell (5), and a quick-release assembly is provided between the protective shell (5) and the base (1).

2. A magnetic shielding sleeve for an end-window type photomultiplier tube according to claim 1, characterized in that: The quick-release assembly comprises a slide cylinder (7), the slide cylinder (7) is sleeved on the protective shell (5), a driving block (8) is arranged on the inner side of the slide cylinder (7), a ball (11) is arranged on the protective shell (5), a fixing groove (6) is arranged on the base (1), and a reset assembly is arranged between the sleeve (2) and the protective shell (5).

3. A magnetic shielding sleeve for an end-window type photomultiplier tube according to claim 2, characterized in that: The reset assembly comprises a spring (10), one end of the spring (10) being arranged on the driving block (8) and the other end being arranged on the protective shell (5).

4. The magnetic shielding sleeve for an end-window type photomultiplier tube according to claim 3, characterized in that: The protective shell (5) is provided with a slide groove (9), the driving block (8) is slidably arranged in the slide groove (9), and the spring (10) is sleeved on the slide groove (9).

5. The magnetic shielding sleeve for an end-window type photomultiplier tube according to claim 2, characterized in that: A guide groove (12) is horizontally arranged on the protective shell (5), and the ball (11) is slidably arranged in the guide groove (12). A plurality of the ball (11) are arranged, and the plurality of the ball (11) are evenly distributed.

6. The magnetic shielding sleeve for an end-window type photomultiplier tube according to claim 1, characterized in that: A limiting plate (13) is arranged on the outside of the base (1), a limiting groove (14) is arranged on the inside of the protective shell (5), and the limiting plate (13) and the limiting groove (14) are slidably arranged.

7. A magnetic shielding sleeve for an end-window type photomultiplier tube according to claim 6, characterized in that: The limiting plate (13) is arranged in an "L" shape, a positioning groove (15) is arranged at the lower end of the limiting groove (14), and the limiting groove (14) is connected to the positioning groove (15).

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