A kind of fixed support for pulse discrimination signal test of photomultiplier tube scintillation detector

Abstract

The utility model discloses a kind of fixed support for pulse discrimination signal test of photomultiplier tube scintillation detector, it is related to photomultiplier tube technical field.The utility model includes support, and further include: fixed part, the fixed part is set on support;Anti-drop part, the anti-drop part is set on fixed part;The fixed part includes fixed assembly, and the fixed assembly is installed on support;Driving assembly, the driving assembly is installed on fixed assembly;The fixed assembly includes the round frame rotationally connected on support, a plurality of rotating frames are rotationally connected on the round frame, a plurality of clamping rods are rotationally connected on the support.The utility model sets up fixed part, solves the problem that it can only realize effective fixing to specific size multiplier due to it, however, in practical application scene, the size of multiplier often exists difference, and this fixed adaptation size design can cause different specifications of multiplier to be incompatible with support, and further affect equipment assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of photomultiplier tube technology, and in particular relates to a fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector. Background Technology

[0002] A scintillator photomultiplier tube (PMT) is a precision optoelectronic device that combines scintillator materials with the core components of a photomultiplier tube for detecting ionizing radiation. Its working principle is as follows: First, the incident ionizing radiation interacts with the scintillator material, causing the scintillator to absorb radiation energy and excite its internal atoms or molecules. These excited particles then release fluorescent photons of specific wavelengths during de-excitation. Next, these fluorescent photons are transmitted to the photocathode of the PMT. Under photon irradiation, the photocathode generates photoelectrons through the photoelectric effect. Finally, the photoelectrons enter the multi-stage dynode structure inside the PMT, undergoing successive multiplication to ultimately form a weak electrical signal that can be detected and recorded by subsequent electronic circuits, thereby achieving precise detection of the presence, intensity, and energy of the incident radiation.

[0003] However, existing brackets can only effectively fix multiplier tubes of a specific size during use. In actual application scenarios, the size of multiplier tubes often varies. This fixed size design will cause multiplier tubes of different specifications to be incompatible with the bracket, thus affecting the equipment assembly efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector. By setting a fixing part, the problem is solved that it can only effectively fix multiplier tubes of a specific size. However, in actual application scenarios, the size of multiplier tubes often varies. This fixed size adaptation design will cause multiplier tubes of different specifications to be incompatible with the bracket, thus affecting the equipment assembly efficiency.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector, comprising a bracket and further comprising: a fixing part disposed on the bracket; an anti-detachment part disposed on the fixing part; the fixing part comprising a fixing component mounted on the bracket; and a driving component mounted on the fixing component; the fixing component comprising a circular frame rotatably connected to the bracket, wherein a plurality of rotating frames are rotatably connected to the circular frame, and a plurality of clamping rods are rotatably connected to the bracket, wherein one end of each clamping rod extends out of the rotating frames and is slidably connected to the rotating frames, and one end of each clamping rod is rotatably connected to a clamping roller, and a photomultiplier tube is disposed on the clamping roller.

[0007] Furthermore, the anti-detachment part includes a limiting component mounted on the bracket; and a configuration component mounted on the limiting component.

[0008] Furthermore, the driving assembly includes a rotating block one rotatably connected to the bracket, a screw rotatably connected to the rotating block one, a rotating block two threadedly connected to the outer wall of the screw, a rotating component on the screw, and a rotating block two rotatably connected to the circular frame. The rotating component includes a knob fixedly connected to the outer wall of the screw, the knob being located on the right side of the screw. The rotating block one on the bracket provides rotational support for the screw. Rotating the knob on the screw can drive the screw to rotate. Through the threaded engagement between the screw and the rotating block two, the rotating block two is driven to push the circular frame to move, thereby achieving precise adjustment of the position of the circular frame.

[0009] Furthermore, the limiting component includes a rotating rod fixedly connected to the outer wall of the screw, a sliding rod fixedly connected to the upper part of the rotating rod, a sliding plate slidably connected to the outer wall of the sliding rod, an insert rod fixedly connected to the left side of the sliding plate, a pull rod fixedly connected to the right side of the sliding plate, and a reset component provided on the outer wall of the sliding rod. The reset component includes a spring wound around the outer wall of the sliding rod, one end of the spring being fixedly connected to the sliding plate, and the other end of the spring being fixedly connected to the sliding rod. The rotating rod on the outer wall of the screw provides an installation carrier for the sliding rod, and the sliding plate on the outer wall of the sliding rod can drive the insert rod to move. The insert rod can be inserted into the corresponding positioning structure to lock the position of the screw, preventing the screw from rotating due to vibration or external force during equipment operation, and ensuring the stability of the circular frame after adjustment.

[0010] Furthermore, the configuration component includes a limiting plate fixedly connected to the right side of the rotating block. The limiting plate has several limiting holes. The right end of the screw extends out of the limiting plate and is rotatably connected to it. The limiting plate on the right side of the rotating block provides additional rotational support for the screw, ensuring that the screw remains stable in both rotational adjustment and locking states, and preventing the positional accuracy of the circular frame from being affected by force deviation. The several limiting holes on the limiting plate can be precisely matched with the plug rods in the limiting component. By inserting the plug rods into different holes, the screw can be locked in different adjustment positions, further refining the limiting point positions and improving the accuracy and reliability of locking.

[0011] This utility model has the following beneficial effects:

[0012] 1. By setting a fixing part, the scintillator multiplier tube needs to be fixed during use. First, place it on the bracket, and then turn the knob at the end of the screw. The knob drives the screw to rotate. The screw is driven by the first rotating block on the bracket, which drives the second rotating block to drive the circular frame that can rotate on the bracket to rotate clockwise. Because multiple rotating frames are connected to the circular frame, and the rotating frames are slidably connected to the clamping rods on the bracket, when the circular frame drives the rotating frames to rotate, the rotating frames slide and drive multiple clamping rods to move synchronously. Finally, the clamping rods drive the clamping rollers to converge towards the center, thereby fixing the scintillator multiplier tube. This structure can flexibly adapt to scintillator multiplier tubes of different sizes to ensure a stable and reliable fixation.

[0013] 2. By setting an anti-detachment part, when the screw needs to be limited after the scintillator multiplier tube is fixed, first pull the pull rod on the slide plate outward. The pull rod drives the slide plate and the insertion rod to slide backward along the outer wall of the slide rod. At the same time, the spring on the outer wall of the slide rod is compressed to accumulate reset energy. After the slide plate and the insertion rod move backward to a suitable position, rotate the slide plate so that the insertion rod is aligned with the insertion hole on the rotating rod. After releasing the slide plate, the spring releases the reset thrust and pushes the slide plate forward, driving the insertion rod to pass through the insertion hole of the rotating rod and insert into the corresponding limit insertion hole of the limit plate, thereby realizing the limit fixation of the rotating rod and the connected screw. This limit setting can effectively prevent the screw from loosening due to accidental rotation, further ensuring the stability of the scintillator multiplier tube during use.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial cross-sectional view of the fixing part of this utility model;

[0018] Figure 3 This is a partial cross-sectional view of the anti-detachment part of the present invention;

[0019] Figure 4 This utility model Figure 2 A magnified structural diagram of A in the middle;

[0020] Figure 5 This utility model Figure 3 A magnified structural diagram of B in the diagram.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Bracket; 2. Fixing part; 21. Fixing assembly; 211. Circular frame; 212. Rotating frame; 213. Clamping rod; 214. Clamping roller; 22. Drive assembly; 221. Rotating block one; 222. Screw; 223. Rotating block two; 224. Knob; 3. Anti-detachment part; 31. Limiting assembly; 311. Rotating rod; 312. Slide rod; 313. Slide plate; 314. Insert rod; 315. Pull rod; 316. Spring; 32. Configuration assembly; 321. Limiting plate; 322. Limiting insertion hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 As shown, this utility model is a fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector, including a bracket 1, and further including: a fixing part 2, which is disposed on the bracket 1; and an anti-detachment part 3, which is disposed on the fixing part 2.

[0025] The fixing part 2 includes a fixing component 21, which is mounted on the bracket 1; and a driving component 22, which is mounted on the fixing component 21. The fixing component 21 includes a circular frame 211 rotatably connected to the bracket 1, a plurality of rotating frames 212 rotatably connected to the circular frame 211, and a plurality of clamping rods 213 rotatably connected to the bracket 1. The ends of the clamping rods 213 that are close to each other extend beyond the rotating frames 212 and are slidably connected to the rotating frames 212. 13. Each of the adjacent ends is rotatably connected to a clamping roller 214. A multiplier tube is installed on each of the clamping rollers 214. The drive assembly 22 includes a rotating block 221 rotatably connected to the support 1. A screw 222 is rotatably connected to the rotating block 221. A rotating block 223 is threaded onto the outer wall of the screw 222. A rotating component is installed on the screw 222. The rotating block 223 is rotatably connected to the circular frame 211. The rotating component includes a knob 224 fixedly connected to the outer wall of the screw 222. The knob 224 is located on the screw 222. On the right side of 2, by setting the fixing part 2, if it is necessary to fix the scintillator multiplier tube during use, it can be placed on the bracket 1 first. After placement, turn the knob 224 at the end of the screw 222. The knob 224 will drive the screw 222 to rotate synchronously. At this time, the screw 222 will be driven by the rotating block 1 221 on the bracket 1, causing the rotating block 223 to drive the circular frame 211 that can rotate on the bracket 1 to rotate clockwise. Since multiple rotating frames 212 are rotatably connected on the circular frame 211, and these rotating... The frame 212 is slidably connected to the multiple clamping rods 213 on the bracket 1. Therefore, as the circular frame 211 drives the multiple rotating frames 212 to rotate, the sliding transmission of the multiple rotating frames 212 will push the multiple clamping rods 213 connected to them to move synchronously. Ultimately, the multiple clamping rods 213 can drive the clamping rollers 214 on them to converge towards the center, thereby fixing the internal scintillator multiplier tube. This structural design can flexibly adapt to scintillator multiplier tubes of different sizes, ensuring that the fixing process is both stable and reliable.

[0026] The anti-detachment part 3 includes a limiting component 31, which is mounted on the bracket 1; and a configuration component 32, which is mounted on the limiting component 31. The limiting component 31 includes a rotating rod 311 fixedly connected to the outer wall of the screw 222. A sliding rod 312 is fixedly connected to the upper part of the rotating rod 311. A sliding plate 313 is slidably connected to the outer wall of the sliding rod 312. An insert rod 314 is fixedly connected to the left side of the sliding plate 313, and a pull rod 315 is fixedly connected to the right side of the sliding plate 313. A reset component is provided on the outer wall of the sliding rod 312. Configuration component 32 includes a limiting plate 321 fixedly connected to the right side of rotating block 221. The limiting plate 321 has several limiting holes 322. The right end of screw 222 extends outside the limiting plate 321 and is rotatably connected to it. The reset component includes a spring 316 wound around the outer wall of slide rod 312. One end of spring 316 is fixedly connected to slide plate 313, and the other end is fixedly connected to slide rod 312. By providing an anti-detachment part 3, after the scintillator multiplier tube is fixedly fixed, further... To limit the screw 222 and prevent accidental rotation that could loosen the clamp, the specific operation is as follows: First, pull the lever 315 on the slide plate 313 outwards. The lever 315 will cause the slide plate 313 and the insert rod 314 on the slide plate to slide backwards along the outer wall of the slide rod 312. At the same time, it will compress the spring 316 fitted on the outer wall of the slide rod 312, allowing the spring 316 to accumulate reset energy. After the lever 315 has moved the slide plate 313 and the insert rod 314 to the appropriate position, rotate the slide plate 313 so that the insert rod 314 is aligned with the rotating rod 311. After aligning the insertion hole on the plate, release the slide plate 313. At this time, the spring 316 will release the reset thrust, pushing the slide plate 313 forward, which in turn drives the insertion rod 314 through the insertion hole of the rotating rod 311 and into the corresponding limiting insertion hole 322 on the limiting plate 321. This achieves the limiting and fixing of the rotating rod 311 and the screw 222 connected to it. Through this limiting setting, the clamping of the screw 222 after fixing can be effectively prevented from loosening due to accidental rotation, further ensuring the stability of the scintillator multiplier tube during use.

[0027] Scintillator photomultiplier tube: This is a detection device that combines a scintillator and a photomultiplier tube. When ionizing radiation rays are incident on the scintillator, the scintillator will produce scintillation light. This light is received by the photomultiplier tube, which converts photons into photoelectrons through the photocathode photoelectric effect. After a multiplication process, the weak light signal is converted into a measurable electrical signal. For example, the CH132 NaI(Tl) scintillation detector from Beijing Hamamatsu Photonics integrates a selected NaI(Tl) crystal and a photomultiplier tube. Its scintillation crystal has a diameter of 27 mm and a thickness of 2 mm, the photomultiplier tube has a diameter of 28 mm, and the minimum effective diameter of the cathode is 25 mm. It can directly output a negative polarity exponentially decaying pulse signal and has the advantages of low noise and stable performance.

[0028] A specific application of this embodiment is as follows: During use, if it is necessary to fix the scintillator multiplier tube, it can be placed on the bracket 1 first. After placement, the knob 224 at the end of the screw 222 is rotated. The knob 224 will synchronously drive the screw 222 to rotate. At this time, the screw 222 will be driven by the first rotating block 221 on the bracket 1, causing the second rotating block 223 to drive the circular frame 211 that can rotate on the bracket 1 to rotate clockwise. Since multiple rotating frames 212 are rotatably connected to the circular frame 211, and these rotating frames 212 are connected to... The multiple clamping rods 213 on the bracket 1 are slidably connected. Therefore, as the circular frame 211 drives the multiple rotating frames 212 to rotate, the sliding transmission of the multiple rotating frames 212 will push the multiple clamping rods 213 connected to them to move synchronously. Ultimately, the multiple clamping rods 213 can drive the clamping rollers 214 on them to converge towards the center, thereby fixing the internal scintillator multiplier tube. This structural design can flexibly adapt to scintillator multiplier tubes of different sizes, ensuring that the fixing process is both stable and reliable. When the scintillator multiplier tube is completed... After fixing, the screw 222 needs to be further limited to prevent accidental rotation that could cause the clamp to loosen. The specific operation is as follows: First, pull the pull rod 315 on the slide plate 313 outward. The pull rod 315 will drive the slide plate 313 and the insert rod 314 on the slide plate to slide backward along the outer wall of the slide rod 312. At the same time, it will compress the spring 316 mounted on the outer wall of the slide rod 312, allowing the spring 316 to accumulate reset energy. After the pull rod 315 drives the slide plate 313 and the insert rod 314 to move backward to the appropriate position, rotate the slide plate 313 so that the insert rod 314 is aligned with the rotation. After aligning the insertion hole on rod 311, release slide plate 313. At this time, spring 316 will release the reset thrust, pushing slide plate 313 forward, which in turn drives insertion rod 314 through the insertion hole of rotating rod 311 and into the corresponding limiting insertion hole 322 on limiting plate 321. Finally, the rotating rod 311 and the screw 222 connected to it are limited and fixed. Through this limiting setting, the screw 222 after fixing can be effectively prevented from loosening due to accidental rotation, further ensuring the stability of scintillator multiplier tube during use.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fixed bracket for testing pulse discrimination signals using a photomultiplier tube scintillation detector, comprising a bracket (1), characterized in that, Also includes: Fixing part (2), the fixing part (2) is disposed on the bracket (1); Anti-detachment part (3), the anti-detachment part (3) is provided on the fixing part (2); The fixing part (2) includes a fixing component (21) which is mounted on the bracket (1); and A drive assembly (22) is mounted on a fixed assembly (21); The fixing component (21) includes a circular frame (211) rotatably connected to the bracket (1), a plurality of rotating frames (212) rotatably connected to the circular frame (211), a plurality of clamping rods (213) rotatably connected to the bracket (1), the ends of the plurality of clamping rods (213) that are close to each other all extend out of the plurality of rotating frames (212) and are slidably connected to the plurality of rotating frames (212), and the ends of the plurality of clamping rods (213) that are close to each other are rotatably connected to clamping rollers (214); Among them, several of the clamping rollers (214) are provided with multiplier tubes.

2. The fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector according to claim 1, characterized in that, The anti-detachment part (3) includes a limiting component (31), which is mounted on the bracket (1); and Configuration component (32) is mounted on limit component (31).

3. The fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector according to claim 2, characterized in that, The drive assembly (22) includes a rotating block one (221) rotatably connected to the bracket (1), a screw (222) rotatably connected to the rotating block one (221), a rotating block two (223) threadedly connected to the outer wall of the screw (222), and a rotating component provided on the screw (222); Among them, the rotating block 2 (223) is rotatably connected to the circular frame (211).

4. The fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector according to claim 3, characterized in that, The limiting component (31) includes a rotating rod (311) fixedly connected to the outer wall of the screw (222), a sliding rod (312) fixedly connected to the upper part of the rotating rod (311), a sliding plate (313) slidably connected to the outer wall of the sliding rod (312), an insert rod (314) fixedly connected to the left side of the sliding plate (313), a pull rod (315) fixedly connected to the right side of the sliding plate (313), and a reset component provided on the outer wall of the sliding rod (312).

5. The fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector according to claim 4, characterized in that, The configuration component (32) includes a limiting plate (321) fixedly connected to the right side of the rotating block (221), and the limiting plate (321) has a plurality of limiting holes (322). The right end of the screw (222) extends to the outside of the limiting plate (321) and is rotatably connected to the limiting plate (321).

6. The fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector according to claim 5, characterized in that, The rotating component includes a knob (224) fixedly connected to the outer wall of the screw (222); The knob (224) is located on the right side of the screw (222).

7. The fixed bracket for pulse discrimination signal testing of a photomultiplier tube scintillation detector according to claim 6, characterized in that, The reset component includes a spring (316) wrapped around the outer wall of the slide bar (312), one end of the spring (316) being fixedly connected to the slide plate (313), and the other end of the spring (316) being fixedly connected to the slide bar (312).

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