CN218728059U

CN218728059U - Neutron detector coupling fixing device

Info

Publication number: CN218728059U
Application number: CN202222685275.6U
Authority: CN
Inventors: 韦舒泉; 张高龙; 马琳琳; 李�浩
Original assignee: Suzhou Ruiduosi Technology Co ltd
Current assignee: Suzhou Ruiduosi Technology Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-03-24
Anticipated expiration: 2032-10-12

Abstract

The utility model discloses a neutron detector coupling fixing device, including flange, flange's the outside is run through to peg graft and is had first stud, and first stud's downside runs through the outside of grafting at first link, the outside of first link is run through to peg graft and is had second stud, second stud's sub-unit connection has probe container. Through the overall structure of equipment, the positioning flange has been designed to probe container upper end part, first double-end screw, first connecting ring and second double-end screw, through twisting the nut of moving first double-end screw and second double-end screw tip, can fasten and fix a position the photomultiplier of putting into, and in order to satisfy the suitability of screw length on the market, still designed a first connecting ring between probe container and the positioning flange, probe container upper end can the direct insertion to the gap of photomultiplier end window department simultaneously, consequently can carry out the light-resistant effectively.

Description

Neutron detector coupling fixing device

Technical Field

The utility model belongs to the technical field of the neutron detector coupling technique and specifically relates to a neutron detector coupling fixing device is related to.

Background

Neutrons are uncharged radiation particles and the information of the neutrons is usually obtained by detecting the interaction products of the neutrons and the substances in an indirect manner. The EJ276 scintillator is rich in H element, has a large neutron cross section, can effectively slow fast neutrons, and can emit photoelectrons when interacting with radiation, so that the EJ276 scintillator is often used as a neutron detection material. Because the intensity of the fluorescence photons generated by the interaction of the scintillator and the radiation particles is low, the signals are weak, and the signals cannot be analyzed, the fluorescence photons need to be amplified and converted into electric signals, so that the analysis requirements can be met. In the field of nuclear radiation detection, commonly used optoelectronic components are, for example, photodiodes, avalanche Photodiodes (APDs), multi-pixel photon counters (MPPC/SiPM), photomultiplier tubes (PMTs), etc. However, the scintillator material and the photoelectric conversion element used as the detector probe are often purchased separately, and then the scintillator material and the photoelectric conversion element are coupled in a certain way and can be protected from light effectively to form a measuring instrument for radiation detection, so that a neutron detector coupling and fixing device is provided

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a neutron detector coupling fixing device to solve the technical problem among the prior art.

The utility model provides a neutron detector coupling fixing device, including flange, flange's the outside is run through to peg graft and is had first stud, and first stud's downside runs through the outside of grafting at first connecting ring, the outside of first connecting ring is run through to peg graft and is had second stud, second stud's sub-unit connection has probe container.

Preferably, a second connecting ring is fixedly welded to the upper portion of the outer side of the probe container, and four first inserting holes are formed in the outer side of the second connecting ring in an annular array.

Preferably, the number of the second double-headed screws is four, the lower parts of the four second double-headed screws correspondingly penetrate through and are inserted into the first inserting holes, and the upper parts of the second double-headed screws are in an annular array and penetrate through and are inserted into second inserting holes formed in the outer side of the first connecting ring.

Preferably, the number of the first stud bolts is four, and the upper side and the lower side of the first stud bolts are respectively inserted into a third insertion hole formed in the outer side of the positioning flange and a fourth insertion hole formed in the outer side of the first connecting ring.

Preferably, the upper side and the lower side of the first double-thread screw and the second double-thread screw are sleeved with nuts through threads.

Preferably, the probe container is an aluminum shell wall container, the lower side wall of the probe container at the second connecting ring is 0.8mm, and the upper side wall of the probe container at the second connecting ring is 1.5mm.

Preferably, the lower part of the inner side of the positioning flange is provided with a positioning cavity, and the upper end of the inner cavity of the positioning cavity is fixedly connected with a rubber gasket.

Compared with the prior art, the beneficial effects of the utility model reside in that:

through the overall structure of equipment, probe container and photomultiplier do not have the adhesion, in order to be in the same place bottom probe container is fixed with photomultiplier, the flange has been designed at probe container upper end part, first double-end screw, first connecting ring and second double-end screw, through twisting the nut of first double-end screw and second double-end screw tip, can fasten and fix a position the photomultiplier of putting into, and in order to satisfy the suitability of screw length on the market, still designed a first connecting ring between probe container and the flange, probe container upper end can the direct insertion in the gap of photomultiplier end window department simultaneously, consequently can carry out the light-resistant effectively.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an overall structure diagram of the present invention;

FIG. 2 is an overall structure diagram of the probe container of the present invention;

FIG. 3 is a cross-sectional view of the positioning flange of the present invention;

fig. 4 is a schematic diagram of an H7195 end-window photomultiplier tube structure.

Reference numerals:

1 probe container, 11 second connecting rings, 2 second double-threaded screws, 3 first connecting rings, 4 first double-threaded screws, 5 positioning flanges, 51 positioning cavities and 52 rubber gaskets.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of 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 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 present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the embodiment of the present invention provides a neutron detector coupling fixing device, which includes a positioning flange 5, the outside of the positioning flange 5 is penetrated and connected with a first stud 4, and the lower side of the first stud 4 is penetrated and connected with the outside of the first connection ring 3, the outside of the first connection ring 3 is penetrated and connected with a second stud 2, and the lower portion of the second stud 2 is connected with a probe container 1.

As shown in fig. 2: the upper part of the outer side of the probe container 1 is fixedly welded with a second connecting ring 11, four first inserting holes are formed in the outer side of the second connecting ring 11 in an annular array, and the second connecting ring 11 is used for connecting a second stud bolt 2.

As shown in fig. 1: the number of the second double-head screws 2 is four, the lower portions of the second double-head screws 2 correspondingly penetrate through and are connected with the first inserting holes in an inserting mode, and the upper portions of the second double-head screws 2 are in an annular array and penetrate through and are connected with the second inserting holes formed in the outer side of the first connecting ring 3 in an inserting mode.

As shown in fig. 1: the number of the first stud bolts 4 is four, and the upper side and the lower side of the first stud bolts 4 are respectively inserted into a third insertion hole formed in the outer side of the positioning flange 5 and a fourth insertion hole formed in the outer side of the first connecting ring 3.

As shown in fig. 2: the upper and lower sides of the first double-head screw rod 4 and the second double-head screw rod 2 are sleeved with nuts through threads, and the length of each of the first double-head screw rod 4 and the second double-head screw rod 2 can be adjusted through the nuts.

As shown in fig. 1 and 2: the probe container 1 is an aluminum shell container, the side wall of the probe container 1 at the lower part of the second connecting ring 11 is 0.8mm, and the side wall of the probe container 1 at the upper part of the second connecting ring 11 is 1.5mm.

As shown in fig. 3: the inboard lower part of locating flange 5 is equipped with location chamber 51, and the inner chamber upper end fixedly connected with rubber packing ring 52 of location chamber 51, and rubber packing ring 52 can protect the photomultiplier of installation, and location chamber 51 can block the photomultiplier upper end outside.

Examples 1,

The probe container 1 is made of aluminum materials, in order to reduce the blocking of the wall thickness of an aluminum shell to rays, the bottom of the probe container 1 needs to be thinned as much as possible, the deformation possibly caused by the processing of the aluminum shell is considered, the processing size of the outer wall of the probe part at the bottom of the probe container 1 is designed to be 0.8mm, the emission direction of fluorescence photons generated in an EJ276 scintillation crystal is random, the cylindrical surface and the bottom surface of the crystal probe need to be subjected to reflection treatment, the generated fluorescence photons enter a photomultiplier after being totally reflected, the loss of the fluorescence photons in the transmission process is reduced, the thickness of a reflection film and a Teflon material for packaging the fluorescence photons is considered during design, and the diameter of the inner wall of the probe container 1 is designed to be slightly larger than the diameter of the crystal by 2-3mm; the H7195 type photomultiplier consists of a photoelectric tube and a tube shell (the H7195 type photomultiplier tube structure is shown in figure 4), the diameter of the photoelectric tube is about 53 +/-1.5 mm, the outer diameter of the photoelectric multiplier tube shell is 60mm, the thickness of the photoelectric multiplier tube shell is 0.8mm, a circular ring gap with the width of 2.5 +/-0.75 mm and the depth of 13mm is arranged between the two end windows of the photoelectric multiplier tube, and therefore the inner diameter of 27.5mm, the thickness of 1.5mm and the height of 12mm of the second connecting ring 11 are designed at the upper end of the probe container 1 and protrude, so that the photoelectric multiplier tube and the probe container 1 can be well matched together. The upper end of the probe container 1 can be directly inserted into the gap at the end window of the photomultiplier, so that the light can be effectively shielded.

And the design of the probe container 1 can ensure that the upper bottom surface of the EJ276 scintillation crystal placed in the probe container is just jointed with the end window of the photomultiplier. The optical silicone grease is uniformly coated on the upper bottom surface of the scintillation crystal, so that the coupling between the optical silicone grease and the end window of the photomultiplier can be tighter, and the permeability of fluorescence photons is ensured.

However, the probe container 1 and the photomultiplier have no adhesiveness, in order to fix the bottom probe container 1 and the photomultiplier together, a positioning flange 5, a first stud 4, a first connecting ring 3 and a second stud 2 are designed at the upper end part of the probe container, nuts at the ends of the first stud 4 and the second stud 2 are screwed, the inserted photomultiplier can be fastened and fixed and positioned, and in order to meet the applicability of the length of the screws on the market, a first connecting ring 3 is also designed between the probe container 1 and the positioning flange 5, and the size and the position of a through hole of the first connecting ring correspond to the probe container 1 and the positioning flange 5 one by one.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A neutron detector coupling fixing device, includes positioning flange (5), its characterized in that: the outer side of the positioning flange (5) is penetrated and inserted with a first double-threaded screw (4), the lower side of the first double-threaded screw (4) is penetrated and inserted at the outer side of the first connecting ring (3), the outer side of the first connecting ring (3) is penetrated and inserted with a second double-threaded screw (2), and the lower part of the second double-threaded screw (2) is connected with a probe container (1).

2. The neutron detector coupling and fixing device of claim 1, wherein: the upper part of the outer side of the probe container (1) is fixedly welded with a second connecting ring (11), and four first inserting holes are formed in the outer side of the second connecting ring (11) in an annular array.

3. The neutron detector coupling and fixing device of claim 2, wherein: the number of the second double-head screws (2) is four, the lower parts of the second double-head screws (2) correspondingly penetrate through and are connected into the first inserting holes in an inserting mode, and the upper parts of the second double-head screws (2) are in an annular array and penetrate through and are connected into second inserting holes formed in the outer side of the first connecting ring (3) in an inserting mode.

4. The neutron detector coupling and fixing device of claim 1, wherein: the number of the first double-head screws (4) is four, and the upper side and the lower side of each first double-head screw (4) are respectively inserted into a third inserting hole formed in the outer side of the positioning flange (5) and a fourth inserting hole formed in the outer side of the first connecting ring (3).

5. The neutron detector coupling and fixing device of claim 4, wherein: the upper side and the lower side of the first double-head screw rod (4) and the second double-head screw rod (2) are sleeved with nuts through threads.

6. The neutron detector coupling and fixing device of claim 1, wherein: the probe container (1) is an aluminum shell wall container, the side wall of the probe container (1) on the lower portion of the second connecting ring (11) is 0.8mm, and the side wall of the probe container (1) on the upper portion of the second connecting ring (11) is 1.5mm.

7. The neutron detector coupling and fixing device of claim 1, wherein: the lower part of the inner side of the positioning flange (5) is provided with a positioning cavity (51), and the upper end of the inner cavity of the positioning cavity (51) is fixedly connected with a rubber gasket (52).