CN216848164U

CN216848164U - Photomultiplier light-shielding packaging device

Info

Publication number: CN216848164U
Application number: CN202123024210.9U
Authority: CN
Inventors: 董翀; 韩昕彤; 王佳渊
Original assignee: Beijing Nuc Safe Technology Co ltd
Current assignee: Beijing Nuc Safe Technology Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-06-28
Anticipated expiration: 2031-12-02

Abstract

The utility model relates to a nuclear radiation detection technology field provides a photomultiplier light-resistant packaging hardware, include: the first shielding component forms a first accommodating cavity with a first opening; the second shielding assembly is provided with a first end and a second end which are opposite, a second accommodating cavity is formed in the second shielding assembly, the first shielding assembly is clamped on the end face of the first end, and the first accommodating cavity is communicated with the second accommodating cavity along the first opening; the third shielding subassembly forms the third chamber that holds that has the second open-ended, and third shielding subassembly joint in the terminal surface of second end, the third hold the chamber along the second opening communicate in the second holds the chamber. The photomultiplier light-resistant packaging device can place radioactive source, crystal, photomultiplier and reading device in proper order in first holding the chamber, the second holds the chamber and the third holds the chamber, need not be in the same place crystal and photomultiplier encapsulation, and it is more convenient to dismantle, is favorable to not unidimensional photomultiplier and crystal combination to use, and detection efficiency is higher.

Description

Light-shading packaging device for photomultiplier

Technical Field

The utility model relates to a nuclear radiation detection technology field especially relates to a photomultiplier light-resistant packaging hardware.

Background

In the field of nuclear radiation detection, a photomultiplier tube (PMT) is an important electronic component, and the application field thereof is very wide, and in order to make the nuclear radiation detection result more accurate, the PMT generally needs to be tested before being mounted to a nuclear radiation detection apparatus. Since the sensitivity of the PMT is high, the PMT cannot be irradiated with strong light after being energized, or it will be damaged, it is necessary to put the PMT in a dark place when testing the photomultiplier tube. However, the shading packaging structure of the traditional photomultiplier only uses the black adhesive tape and the metal to carry out shading packaging, and the photomultiplier and the crystal need to be packaged together during use, so that the shading effect is poor and the disassembly is difficult, and further, the measurement result is inaccurate, and the test efficiency is low.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the technical problems existing in the related art. Therefore, the utility model provides a photomultiplier light-resistant packaging hardware, including the first shielding subassembly, second shielding subassembly and the third shielding subassembly of mutual joint, photomultiplier need not the encapsulation with the crystal and is in the same place, and it is convenient to dismantle, and efficiency of software testing is higher.

According to the utility model provides a pair of photomultiplier light-resistant packaging hardware that provides, include:

a first shielding component forming a first accommodating cavity with a first opening;

the second shielding assembly is provided with a first end and a second end which are opposite, a second accommodating cavity is formed in the second shielding assembly, the second accommodating cavity is communicated with the outside along the first end and the second end, the first shielding assembly is clamped on the end face of the first end, and the first accommodating cavity is communicated with the second accommodating cavity along the first opening;

and the third shielding assembly forms a third accommodating cavity with a second opening, the third shielding assembly is clamped on the end surface of the second end, and the third accommodating cavity is communicated with the second accommodating cavity along the second opening.

According to the utility model discloses an embodiment, the terminal surface of first end is followed first annular slot has been seted up to first open-ended periphery, first shielding component joint in first annular slot.

According to the utility model discloses an embodiment, the second end with one of them of two adjacent terminal surfaces of third shielding subassembly is equipped with the annular slot of second, and another is provided with the annular protruding edge of second, the annular protruding edge activity of second is inserted and is established in the annular slot of second.

According to the utility model discloses an embodiment, the second annular slot with the quantity on the annular protruding edge of second is two at least.

According to the utility model discloses an embodiment, first shielding component includes that shading inner tube, cover establish the shading urceolus outside the shading inner tube and connect in the shading inner tube with the top cap of shading urceolus, the quantity of first cyclic annular slot is two, the shading inner tube with the shading urceolus is kept away from the one end of top cap is inserted in proper order and is established two in the first cyclic annular slot.

According to the utility model discloses an embodiment, follow first end to the direction that the second end extends, second shielding subassembly includes a plurality of shielding section of thick bamboo, and is a plurality of shielding section of thick bamboo is followed first end to the direction that the second end extends is piled up the setting, and adjacent two can dismantle the connection between the shielding section of thick bamboo.

According to the utility model discloses an embodiment, third shielding component keeps away from second open-ended one end is equipped with the third opening, third opening department is provided with the base.

According to the utility model discloses an embodiment, the third holds the intracavity and is formed with annular step, the base include the bottom plate and connect in the connecting cylinder of bottom plate, the connecting cylinder is kept away from the terminal surface butt of the one end of bottom plate in annular step.

According to the utility model discloses an embodiment, the connecting cylinder is kept away from the terminal surface of the one end of bottom plate with be provided with the sealing washer between the cyclic annular step.

According to the utility model discloses an embodiment, be provided with first through-hole on the connecting cylinder, first through-hole is suitable for installation cable joint.

The utility model provides an above-mentioned one or more technical scheme has one of following technological effect at least:

the embodiment of the utility model provides a photomultiplier light-resistant packaging hardware, including first shielding subassembly, second shielding subassembly and third shielding subassembly, first shielding subassembly forms to have the first chamber that holds of first open-ended, and second shielding subassembly is the hollow structure that both ends link up, is equipped with relative first end and second end, and second shielding subassembly is inside to be formed with the second and holds the chamber, and the second holds the chamber and communicates in the outside along first end and second end. First shielding component joint holds the chamber in the second along first opening intercommunication in the terminal surface of first end, the first chamber that holds. The third shielding subassembly forms the third that has the second open-ended and holds the chamber, and third shielding subassembly joint holds the chamber and communicates in the second along the second opening and hold the chamber in the terminal surface of second end, third. During photomultiplier light-resistant packaging hardware during operation, can place radiation source, crystal, photomultiplier and reading device in proper order and hold the chamber at first, the second holds the chamber and the third holds the chamber, need not be in the same place crystal and photomultiplier encapsulation, and it is more convenient to dismantle, is favorable to not unidimensional photomultiplier and crystal to use in combination, and detection efficiency is higher. Meanwhile, the photomultiplier light-shading packaging device is assembled in a modularized mode, the light-shading effect is good, and external interference is avoided.

Drawings

Fig. 1 is a side view of a light-shielding packaging apparatus for a photomultiplier according to an embodiment of the present invention;

fig. 2 is a sectional view of the photomultiplier tube light-shielding packaging apparatus according to an embodiment of the present invention.

Reference numerals:

110. a first shield assembly; 112. a first accommodating chamber; 114. an inner shading cylinder; 116. a light-shielding outer cylinder; 118. a top cover; 120. a second shielding assembly; 122. a first end; 124. a second end; 126. a second accommodating chamber; 128. a shielding cylinder; 1220. a first annular slot; 1240. a second annular slot; 130. a third shielding assembly; 132. a third accommodating chamber; 134. an annular step; 136. a seal ring; 138. a second through hole; 1310. a second annular ledge; 140. a base; 142. a base plate; 144. a connecting cylinder; 1440. a first through hole; 146. and (4) a cable joint.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the utility model.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

According to the embodiment of the present invention, please refer to fig. 1 to fig. 2, the light-shielding packaging apparatus for a photomultiplier includes a first shielding assembly 110, a second shielding assembly 120, and a third shielding assembly 130.

The first shielding member 110 has a first receiving cavity 112 formed therein for receiving a radioactive source, a crystal, etc.

The volume of the first accommodating cavity 112 is adapted to the volumes of the crystal and the radioactive source, so that not only can various common crystals and radioactive sources be placed in the first accommodating cavity 112, but also the crystal and the radioactive source can be preliminarily positioned, and shaking or dislocation of each element is avoided. When the radioactive source is arranged in the radioactive source box, the volume of the radioactive source box needs to be considered.

In some embodiments, a positioning structure for mounting the crystal and the radiation source cassette is disposed within the first receiving cavity 112.

In order to avoid interference of external light and environmental radiation to the elements inside the light-shielding packaging device of the photomultiplier tube, the first shielding assembly 110, the second shielding assembly 120 and the third shielding assembly 130 are all made of lead, and lead has high density and atomic number and good shielding effect.

It is understood that the first shielding element 110, the second shielding element 120 and the third shielding element 130 are cylindrical structures as much as possible, although other structures are not excluded in practical applications.

The first receiving chamber 112 has a first opening through which communication with the outside is possible. The second shielding assembly 120 has a first end 122 and a second end 124 opposite to each other, and a second accommodating cavity 126 is formed inside the second shielding assembly, and the second accommodating cavity 126 is communicated with the outside along the first end 122 and the second end 124 and is a hollow structure with two through ends.

The first shielding element 110 is clamped to an end surface of the first end 122, and the first accommodating cavity 112 is communicated with the second accommodating cavity 126 along the first opening.

The second accommodating cavity 126 is used for accommodating elements such as a photomultiplier tube, and when the first shielding assembly 110 is clamped on the end face of the first end 122, the photomultiplier tube is in contact connection with the crystal.

A third accommodating chamber 132 is formed in the third shielding member 130 for accommodating a reader or the like, and the third accommodating chamber 132 has a second opening. The third shielding member 130 is clamped to the end surface of the second end 124, the third accommodating cavity 132 is communicated with the second accommodating cavity 126 along the second opening, and the reading device is connected to the photomultiplier tube.

The embodiment of the utility model provides an among the photomultiplier light-resistant packaging hardware, first shielding component 110 joint is in the terminal surface of first end 122, and third shielding component 130 joint is in the terminal surface of second end 124, and photomultiplier light-resistant packaging hardware is comparatively convenient when the installation and dismantle.

When it is desired to replace the crystal or radiation source cassette, the first shield assembly 110 is removed along the end face of the first end 122 and a new crystal or radiation source cassette can be removed and replaced along the first opening.

When the photomultiplier tube needs to be replaced, the first shield assembly 110 is removed along the end surface of the first end 122, and the third shield assembly 130 is removed along the end surface of the second end 124, so that the photomultiplier tube can be replaced with a new photomultiplier tube.

It can be understood that the embodiment of the utility model provides a photomultiplier light-resistant packaging hardware can place radiation source, crystal, photomultiplier and reading device in proper order and hold the chamber, the second holds the chamber and the third holds the chamber in first holding, need not be in the same place crystal and photomultiplier encapsulation, and it is more convenient to dismantle, is favorable to not unidimensional photomultiplier and crystal combination to use, and detection efficiency is higher. Meanwhile, the photomultiplier light-shading packaging device is assembled in a modularized mode, the light-shading effect is good, and external interference is avoided.

In order to improve the accuracy of the detection result, it is necessary to improve the sealing performance and the anti-interference capability of the photomultiplier tube light-shielding packaging device.

In some embodiments, the end surface of the first end 122 defines a first annular slot 1220 along a periphery of the first opening. The first annular slot 1220 may be formed by an end surface of the first end 122 being inwardly recessed, may be outwardly protruding, or may be a separate member.

The first shielding element 110 is inserted into the first annular slot 1220 along the edge of the first opening, and is engaged with the first annular slot 1220.

In some embodiments, an annular step is formed at an end surface of first end 122, and first shield assembly 110 is snapped onto the annular step along the first opening, so that the first shield assembly 110 and the second shield assembly 120 can be snapped together.

In some embodiments, one of the adjacent two end surfaces of the second end 124 and the third shielding assembly 130 is provided with a second annular slot 1240, and the other is provided with a second annular protruding edge 1310, and the second annular protruding edge 1310 is movably inserted into the second annular slot 1240.

When the end surface of the second end 124 is provided with the second annular slot 1240, the end surface of the third shielding assembly 130 facing the end of the second shielding assembly 120 is provided with a second annular convex edge 1310, the second annular convex edge 1310 is distributed outside the second opening, and the second annular convex edge 1310 is movably inserted into the second annular slot 1240.

When the end surface of second end 124 is provided with second annular protruding edge 1310, the end surface of third shielding assembly 130 facing the end of second shielding assembly 120 is provided with second annular insertion slots 1240, the second annular insertion slots 1240 are distributed outside the second opening, and the second annular protruding edge 1310 is movably inserted in the second annular insertion slots 1240.

In some embodiments, the second end 124 and two adjacent end faces of the third shielding assembly 130 are each provided with a plurality of second annular protruding edges 1310, and a second annular slot 1240 is formed between two adjacent second annular protruding edges 1310. The second annular protruding edges 1310 on the two end faces are arranged in a staggered manner, so that the second shielding assembly 120 and the third shielding assembly 130 can be clamped.

It should be noted that, no matter which end surface the second annular slot 1240 and the second annular protruding edge 1310 are disposed on, the number of the second annular slot 1240 and the second annular protruding edge 1310 may be multiple, which may increase the sealing performance and the anti-interference capability of the light-shielding packaging device for the photomultiplier tube.

In order to improve the light shielding performance of the light shielding packaging device for the photomultiplier, the light shielding capability of the first shielding assembly 110 needs to be improved.

In some embodiments, first shield assembly 110 includes a shade inner barrel 114, a shade outer barrel 116, and a top cap 118.

The outer shading cylinder 116 is sleeved outside the inner shading cylinder 114, and a space is formed between the outer shading cylinder and the inner shading cylinder. The top cover 118 is connected to the shade inner cylinder 114 and the shade outer cylinder 116, the top cover 118 is used for sealing one end of the shade inner cylinder 114 and the shade outer cylinder 116, and the end without the top cover 118 forms a first opening.

Two concentric annular end parts (namely, first annular convex edges) are formed at one ends of the shading inner cylinder 114 and the shading outer cylinder 116, which are far away from the top cover 118, the number of the first annular slots 1220 is two, and the ends of the shading inner cylinder 114 and the shading outer cylinder 116, which are far away from the top cover 118, are sequentially inserted into the two first annular slots 1220.

The shading inner cylinder 114 and the shading outer cylinder 116 can generate double shielding effects on the radioactive source and the crystal, and the shading effect is good.

It can be understood that the shading inner cylinder 114 and the shading outer cylinder 116 are made of lead, and have strong interference resistance.

In order to improve the applicability of the photomultiplier light-shielding packaging device, different crystals and photomultipliers can be placed into the photomultiplier light-shielding packaging device for combination. As the model of the photomultiplier tube changes, the size of the photomultiplier tube may change, requiring replacement of the second shield assembly 120 of the appropriate size.

In some embodiments, the second shielding assembly 120 includes a plurality of shielding cylinders 128 along a direction extending from the first end 122 to the second end 124, the plurality of shielding cylinders 128 are stacked along a direction extending from the first end 122 to the second end 124, and adjacent shielding cylinders 128 are detachably connected.

It is understood that when a plurality of shielding cylinders 128 are connected in series, the overall size is increased, and the photomultiplier tube can be used for a long photomultiplier tube. When a shorter photomultiplier tube is used, one or more of the shield cans 128 may be removed to shorten the length of the second shield assembly 120.

The second shielding assembly 120 formed by connecting the shielding cylinders 128 can be suitable for photomultiplier tubes of different models and sizes, and has strong applicability.

In order to ensure that the first shielding assembly 110, the second shielding assembly 120 and the third shielding assembly 130 can be smoothly connected after the shielding cylinder 128 is added or reduced, the shielding cylinder 128 can adopt a standard structure, the two ends of the shielding cylinder 128 are provided with annular convex edges or annular slots with the same specification, and the connection structure of the end faces is the same after the shielding cylinder 128 is disassembled or assembled.

In some embodiments, an end of the third shielding assembly 130 distal from the second opening is provided with a third opening at which the base 140 is provided.

The base 140 can support the light-shielding photomultiplier packaging device, which is beneficial to maintaining the stability of the light-shielding photomultiplier packaging device and maintaining the position relationship among the radiation source box, the crystal and the photomultiplier.

In some embodiments, the base 140 includes a base plate 142 and a connector barrel 144, the connector barrel being connected to the base plate 142.

An annular step 134 is formed in the third accommodating cavity 132, and one end of the connecting cylinder 144 away from the bottom plate 142 abuts against the annular step 134, so that leakage of radioactive materials can be avoided.

A fourth receiving cavity is formed in the connector barrel 144 for routing communication lines and associated electronics. The connecting cylinder 144 and the third shielding assembly 130 can form a double protection function for the reading device, so that the radioactive substance is prevented from leaking along the reading device, and the safety of the photomultiplier light-shielding packaging device is improved.

In some embodiments, a sealing ring 136 is disposed between an end surface of the end of the connector barrel 144 remote from the base plate 142 and the annular step 134. The sealing ring 136 further increases the sealing performance of the base 140 and the third shielding assembly 130, and the safety is high.

A reader is disposed within the third housing chamber 132 and, in use, requires a signal from the reader to be transmitted to the control apparatus.

In some embodiments, a first aperture 1440 is disposed in the connector barrel 144, and a second aperture 138 is disposed in the third shield assembly 130, the second aperture 138 corresponding to the first aperture 1440.

To avoid leakage of radioactive materials, the fourth cavity in the connector barrel 144 is not in direct communication with the outside, and the first through hole 1440 is adapted to receive the cable connector 146.

To sum up, the embodiment of the utility model provides a photomultiplier light-resistant packaging hardware, including first shielding subassembly, second shielding subassembly and third shielding subassembly, first shielding subassembly forms and has the first chamber that holds of first open-ended, and the hollow structure that second shielding subassembly is link up for both ends is equipped with relative first end and second end, and second shielding subassembly is inside to be formed with the second and holds the chamber, and the second holds the chamber and communicates in the outside along first end and second end. First shielding component joint holds the chamber in the second along first opening intercommunication in the terminal surface of first end, the first chamber that holds. The third shielding subassembly forms the third that has the second open-ended and holds the chamber, and third shielding subassembly joint holds the chamber and communicates in the second along the second opening and hold the chamber in the terminal surface of second end, third. During photomultiplier light-resistant packaging hardware during operation, can place radiation source, crystal, photomultiplier and reading device in proper order and hold the chamber at first holding the chamber, the second holds the chamber and the third holds the chamber, need not be in the same place crystal and photomultiplier encapsulation, and it is more convenient to dismantle, is favorable to not unidimensional photomultiplier and crystal combination to use, and detection efficiency is higher. Simultaneously, photomultiplier light-resistant packaging hardware modularized assembly, the shading is effectual, has avoided external interference.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a photomultiplier is encapsulating device that keeps away light which characterized in that includes:

2. The light-shielding photomultiplier tube package according to claim 1, wherein a first annular slot is formed in an end surface of the first end along a periphery of the first opening, and the first shield assembly is clamped in the first annular slot.

3. The light-shielding photomultiplier tube encapsulation device according to claim 2, wherein one of the two adjacent end surfaces of the second end and the third shielding assembly is provided with a second annular slot, and the other end surface of the second end and the third shielding assembly is provided with a second annular protruding edge, and the second annular protruding edge is movably inserted into the second annular slot.

4. The light-shielding photomultiplier encapsulation device according to claim 3, wherein the number of the second annular slots and the second annular rims is at least two.

5. The photomultiplier tube light-shielding packaging device according to any one of claims 2 to 4, wherein the first shielding assembly includes a light-shielding inner cylinder, a light-shielding outer cylinder sleeved outside the light-shielding inner cylinder, and a top cover connected to the light-shielding inner cylinder and the light-shielding outer cylinder, the number of the first annular slots is two, and ends of the light-shielding inner cylinder and the light-shielding outer cylinder, which are away from the top cover, are sequentially inserted into the two first annular slots.

6. The light-shielding apparatus for photomultiplier according to claim 5, wherein the second shielding assembly comprises a plurality of shielding cylinders along a direction extending from the first end to the second end, the plurality of shielding cylinders are stacked along a direction extending from the first end to the second end, and two adjacent shielding cylinders are detachably connected to each other.

7. The light-shielding photomultiplier tube encapsulation device according to claim 5, wherein a third opening is disposed at an end of the third shielding assembly away from the second opening, and a base is disposed at the third opening.

8. The light-shielding packaging apparatus for photomultiplier according to claim 7, wherein an annular step is formed in the third accommodating chamber, the base includes a bottom plate and a connecting cylinder connected to the bottom plate, and an end surface of one end of the connecting cylinder away from the bottom plate abuts against the annular step.

9. The light-shielding packaging device for photomultiplier according to claim 8, wherein a sealing ring is disposed between an end surface of the end of the connecting cylinder away from the bottom plate and the annular step.

10. The light-shielding photomultiplier encapsulation device according to claim 8, wherein a first through hole is provided in the connector, and the first through hole is adapted to receive a cable connector.