CN218782801U - Neutron collimator structure - Google Patents

Abstract

The utility model belongs to the technical field of the neutron collimater, the neutron collimater structure is disclosed, this neutron collimater structure includes first collimator, the second collimator, limiting plate and diaphragm subassembly, the second end of first collimator is provided with first bulge, the both ends of second collimator are provided with second depressed part and second bulge respectively, the limiting plate is installed to the flange face at the hookup location of first collimator and second collimator, the limiting plate is used for restricting first collimator and second collimator and rotates relatively, first bulge and the cooperation of pegging graft of second depressed part, realize the coaxial butt joint installation of first collimator and second collimator, reach the requirement of higher axiality, and simultaneously, it is spacing to realize the angle direction corner, the end cover sets up in the second collimator, and the end cover is provided with the arc wall, the diaphragm is pegged graft in the arc wall, and the arc surface of diaphragm supports tightly with the inner wall of arc wall, realize higher axiality requirement through the cooperation of arc wall and diaphragm.

Description

Neutron collimator structure

Technical Field

The utility model relates to a neutron collimator technical field especially relates to neutron collimator structure.

Background

The neutron small-angle scattering is an experimental technology for researching mesoscopic scale structures in different substances by utilizing elastic neutron scattering at a low scattering angle, and is widely applied to the aspects of new energy, new materials, new drug development and the like. In order to reduce the stray of air to neutrons on an incident light path before a small-angle neutron scattering spectrometer is close to a sample, a sample front vacuum chamber is generally arranged on the sample front neutron incident light path, and in order to further reduce the neutron loss on a neutron flight light path, neutrons emitted by a neutron source realize a collimation effect through a neutron collimator so as to restrain the longitudinal and transverse angle divergence of the neutrons along an expected direction and form a focused neutron beam.

As the collimation positioning precision of the neutron optical component is very high by the neutron small-angle scattering experimental technology, the inner wall of the conventional neutron collimator is influenced by the structure of the conventional neutron collimator and can reflect neutrons, so that the collimation performance is reduced, the collimation distance is short, the beam divergence is large, and the conventional neutron collimator needs to have high coaxiality with a neutron beam. Meanwhile, a round hole diaphragm is required to be additionally arranged in front of a sample in a scattering test to further restrict the spot size and the divergence of neutrons, and the coaxiality of the round hole diaphragm and neutron beam current is also required to be higher.

Therefore, a neutron collimator structure is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a neutron collimator structure can realize that the corner of angle direction is spacing, improves the axiality between two adjacent collimator to can realize the higher axiality requirement of diaphragm and collimator.

In order to solve the above problems existing in the prior art, the utility model adopts the following technical scheme:

a neutron collimator structure for mounting in a collimation capsule having a vacuum cavity, comprising:

the first collimating tube is connected to the corrugated tube of the collimating cabin in a sealing mode, the first end of the first collimating tube is communicated with the vacuum cavity of the collimating cabin, and the second end of the first collimating tube is provided with a first protruding part;

the second collimator is communicated with the first collimator, a second concave part and a second convex part are respectively arranged at two ends of the second collimator, and the first convex part of the first collimator is in inserting fit with the second concave part of the second collimator;

the limiting plate is arranged on the butt flange surfaces of the first collimator and the second collimator and used for limiting the relative rotation of the first collimator and the second collimator;

the diaphragm assembly comprises a diaphragm plate and an end cover, the end cover is arranged on the second collimator, an arc-shaped groove is formed in the end cover, the diaphragm plate is inserted into the arc-shaped groove, and the arc surface of the diaphragm plate is tightly abutted to the inner wall of the arc-shaped groove.

Preferably, the number of the second collimator is multiple, the second protrusion of one of the second collimators of every two adjacent second collimators is inserted into the second recess of the other second collimator, the second collimator includes a shell and a neutron absorption tube, an outer peripheral wall of the neutron absorption tube is fixedly connected to an inner peripheral wall of the shell, the neutron absorption tube is made of a boron-aluminum alloy material, and the shell is made of an aluminum alloy material.

Preferably, the number of the limiting plates is multiple, and the limiting plates are arranged at intervals along the circumferential direction of the second collimator.

Preferably, the neutron collimator structure still includes locking Assembly, locking Assembly includes locking screw and two mount pads, the mount pad set up in the flange face that docks, the mount pad has the connecting hole, locking screw wears to locate two in proper order the mount pad the connecting hole to make two mount pads will first collimator with the relative position locking of second collimator.

Preferably, the diaphragm subassembly still includes the retaining member, the lateral wall of arc wall is provided with the screw hole, the retaining member passes screw hole and butt in the arc surface of diaphragm plate.

Preferably, the neutron collimator structure further includes a sealing ring, the end cover is provided with a third depressed portion, and the sealing ring is clamped between the second protruding portion and the third depressed portion.

Preferably, the diaphragm assembly further comprises a sapphire window and a pressing plate, wherein the pressing plate is fixed and pressed tightly so that the sapphire window abuts against the sealing ring, and the sapphire window is arranged to be sapphire.

Preferably, the neutron collimator structure still includes fixed establishment, fixed establishment includes sleeve pipe and a plurality of stationary dog, the sleeve pipe cover is located first collimation pipe is followed sheathed tube circumferencial direction, it is a plurality of the stationary dog interval set up in sheathed tube outer peripheral face, just stationary dog fixed connection in on the gusset of collimation cabin.

Preferably, fixed establishment still includes a plurality of adjusting bolt, the sleeve pipe is the rectangular pipe, sheathed tube periphery wall is provided with the mounting hole, the quantity of mounting hole has a plurality ofly, and is a plurality of the mounting hole is followed sheathed tube peripheral direction interval sets up, adjusting bolt passes the mounting hole and support tightly in the periphery wall of first collimator.

Preferably, the fixing mechanism further comprises two limiting assemblies, wherein the two limiting assemblies are respectively arranged at two ends of the sleeve, each limiting assembly comprises an adjusting jackscrew and a mounting plate, the mounting plate is fixedly connected to the outer peripheral surface of the first collimator tube, and the adjusting jackscrew penetrates through the mounting plate and abuts against the sleeve tightly.

The beneficial effects of the utility model are that:

the utility model provides a neutron collimator structure for install in the collimation cabin, first collimation pipe sealing connection is in the bellows in collimation cabin, and the first end of first collimation pipe and the vacuum cavity intercommunication setting in collimation cabin, and the second end of first collimation pipe is provided with first bulge. The second collimator communicates in first collimator, the both ends of second collimator are provided with second depressed part and second bulge respectively, the limiting plate is installed to the flange face at the hookup location of first collimator and second collimator, the limiting plate is used for restricting first collimator and second collimator and rotates relatively, cooperation of pegging graft of first bulge and second depressed part, and realize the coaxial butt joint installation of first collimator and second collimator through the limiting plate of installation on the flange face, reach the requirement of higher axiality, it is spacing to realize the angle direction corner simultaneously under the effect of limiting plate, ensure that first collimator and second collimator aim at and do not have the angle dislocation. The diaphragm assembly comprises a diaphragm plate and an end cover, the end cover is arranged on the second collimator, the end cover is provided with an arc-shaped groove, the diaphragm plate is inserted into the arc-shaped groove, the arc surface of the diaphragm plate is tightly abutted to the inner wall of the arc-shaped groove, and the higher coaxiality requirement is realized through the matching of the arc-shaped groove and the diaphragm plate.

Drawings

Fig. 1 is a schematic diagram of a neutron collimator structure according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a first cross-sectional view of a neutron collimator structure according to an embodiment of the present invention;

fig. 4 is a second cross-sectional view of the neutron collimator structure in the embodiment of the present invention;

fig. 5 is a side view of a neutron collimator structure in an embodiment of the invention;

FIG. 6 is a schematic diagram of a second collimator according to an embodiment of the present invention;

FIG. 7 is a side view of a second collimator according to an embodiment of the invention;

FIG. 8 is a cross-sectional view of a second collimator according to an embodiment of the present invention;

fig. 9 is an exploded view of a diaphragm assembly according to an embodiment of the present invention;

fig. 10 is a cross-sectional view of a diaphragm assembly in an embodiment of the present invention.

Reference numerals:

1. a first collimator;

2. a second collimator; 21. a housing; 22. a neutron-absorbing tube;

3. a limiting plate;

4. a diaphragm assembly; 41. a diaphragm plate; 42. an end cap; 421. an arc-shaped slot; 43. a locking member; 44. a sapphire window; 45. a compression plate; 46. an anti-drop plate;

5. a locking assembly; 51. locking the screw; 52. a mounting base;

6. a fixing mechanism; 61. a sleeve; 62. a fixed jaw; 63. adjusting the bolt; 64. a limiting component; 641. adjusting a jackscrew; 642. and (7) mounting the plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, 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" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As the collimation positioning precision of the neutron optical component is very high by the neutron small-angle scattering experimental technology, the inner wall of the conventional neutron collimator is influenced by the structure of the conventional neutron collimator and can reflect neutrons, so that the collimation performance is reduced, the collimation distance is short, the beam divergence is large, and the conventional neutron collimator needs to have high coaxiality with a neutron beam. Meanwhile, a round hole diaphragm is required to be additionally arranged in front of a sample in a scattering test to further restrict the spot size and the divergence of neutrons, and the coaxiality of the round hole diaphragm and neutron beam current is also required to be higher. To this end, this embodiment provides a neutron collimator structure, can realize that the corner of angular direction is spacing, improves the axiality between two adjacent collimator to can realize the higher axiality requirement of diaphragm and collimator.

As shown in fig. 1 to 10, in the present embodiment, a neutron collimator structure is used to be installed in a collimation cabin, and the neutron collimator structure includes a first collimator tube 1, a second collimator tube 2, a limiting plate 3, and a diaphragm assembly 4. Wherein, first collimator 1 sealing connection is in the bellows in collimation cabin, and the first end of first collimator 1 sets up with the vacuum cavity intercommunication in collimation cabin, and the second end of first collimator 1 is provided with first bulge, and second collimator 2 communicates in first collimator 1, and the both ends of second collimator 2 are provided with second depressed part and second bulge respectively, and the cooperation of pegging graft of the first bulge of first collimator 1 and the second depressed part of second collimator 2. Limiting plate 3 is installed in the flange face of butt joint of first collimator 1 and second collimator 2, and limiting plate 3 is used for restricting first collimator 1 and second collimator 2 relative rotation, and diaphragm subassembly 4 includes diaphragm plate 41 and end cover 42, and end cover 42 sets up in second collimator 2, and end cover 42 is provided with arc wall 421, and diaphragm plate 41 pegs graft in arc wall 421, and the arc surface of diaphragm plate 41 supports tightly with the inner wall of arc wall 421. Specifically, first collimator 1 is stainless steel material, and its inside quad slit that has seted up to install rectangle neutron absorption tube 22 in the quad slit, adopt boron-aluminum alloy material to make, boron-aluminum alloy contains boron carbide and can absorbs the neutron. The front end face and the rear end face of the first collimator 1 are circular flange sealing faces, a first concave portion and a first convex portion are arranged at the first end and the second end of the first collimator 1 respectively, the first collimator 1 is of an integrated processing and forming structure, and an internal rectangular pipe is formed by linear cutting. The circular sealing flange face of preceding terminal surface and the rear end face of second collimator 2 is provided with second depressed part and second bulge respectively, and install limiting plate 3 at the flange face of the hookup location of first collimator 1 and second collimator 2, first bulge and the cooperation of pegging graft of second depressed part, and realize the coaxial butt joint installation of first collimator 1 and second collimator 2 fast through limiting plate 3 of installation on the flange face, reach the requirement of higher axiality, simultaneously, it is spacing to realize the angle direction corner under limiting plate 3's effect, ensure that first collimator 1 and second collimator 2 aim at and do not have the angle dislocation, and only need the collimation once, follow-up change need not realign again, convenient and fast. The end cover 42 is installed at the end of the second collimator 2, and the end cover 42 is provided with a hole for the neutron to pass through, the end cover 42 is provided with an arc-shaped groove 421, wherein the depth of the arc-shaped groove 421 is slightly larger than the thickness of the diaphragm plate 41 by 0.1mm, and simultaneously, the width of the arc-shaped groove 421 and the diameter of the semicircle at the bottom of the arc-shaped groove 421 is slightly larger than the diameter of the diaphragm plate 41 by 0.05mm. The higher coaxiality requirement is realized through the cooperation of the arc-shaped grooves 421 and the diaphragm plates 41.

Further, with reference to fig. 1 to 10, there are a plurality of second collimator tubes 2, the second projection of one of the second collimator tubes 2 of every two adjacent second collimator tubes 2 is inserted into the second recess of the other second collimator tube 2, the second collimator tube 2 includes a shell 21 and a neutron-absorbing tube 22, the outer peripheral wall of the neutron-absorbing tube 22 is fixedly connected to the inner peripheral wall of the shell 21, the neutron-absorbing tube 22 is made of boron-aluminum alloy material, and the shell 21 is made of aluminum alloy material. Specifically, in this implementation, three second collimators 2 are provided, the structures of the second collimators are the same, the specific number of the second collimators is designed into different lengths or sections according to needs, and the second collimators 2 are sequentially connected end to end. In order to lighten the weight, the shell 21 is made of an aluminum alloy material, the inner part of the shell is a square threaded hole, the outer part of the shell is of a cylindrical structure, the diameter of the second protruding part is smaller than that of the second recessed part by 0.1mm, and the coaxiality of two adjacent collimation tubes can be better than 0.2mm through the matching of the two collimation tubes when the two collimation tubes are in butt joint.

Further, with continued reference to fig. 1 to 10, there are a plurality of the position limiting plates 3, and the plurality of the position limiting plates 3 are arranged at intervals along the circumferential direction of the second collimator 2. Specifically, four limiting plates 3 are mounted on the circular sealing flange face at the rear end of each second collimator 2, so that the rotation angle limiting in the angle direction is realized, and the alignment of the inner square holes of two adjacent second collimators 2 is ensured without angle dislocation. The arc 421 of the end cap 42 is matched with the second protrusion of the flange surface of the second collimator 2 via the third recess of the flange surface, and the end cap 42 and the second collimator 2 are coaxially mounted in a butt joint manner via the plurality of limiting plates 3.

Further, with continued reference to fig. 1-10, the neutron collimator structure further includes a locking assembly 5, the locking assembly 5 includes a locking screw 51 and two installation bases 52, the installation bases 52 are disposed on the abutting flange face, the installation bases 52 have connection holes, one installation base 52 is a through hole, the other installation base 52 is a threaded hole, the locking screw 51 sequentially penetrates through the through hole of one installation base 52 and is in threaded connection with the threaded hole of the other installation base 52, so that the two installation bases 52 lock the relative positions of the first collimator 1 and the second collimator 2, all the second collimators 2 and the first collimator 1 are locked by four sets of locking assemblies 5, and the sealing connection of the second collimator 2 and the end cover 42 can be realized. According to the needs of experiments, the second collimator 2 which is not needed can be disassembled, and the disassembly can be realized only by unscrewing the locking component 5.

Further, with continued reference to fig. 1-10, the diaphragm assembly 4 further includes a retaining member 43, a side wall of the arc-shaped slot 421 is provided with a threaded hole, and the retaining member 43 passes through the threaded hole and abuts against the arc surface of the diaphragm plate 41. Specifically, the locking members 43 are provided as screws, and after the diaphragm plate 41 is inserted into the arc-shaped groove 421 of the end cover 42, the locking is realized by the locking members 43 arranged at two sides of the end cover 42.

Further, with continued reference to fig. 1-10, the neutron collimator structure further includes a sealing ring, the end cap 42 is provided with a third recessed portion, and the sealing ring is clamped between the second protruding portion and the third recessed portion. Specifically, the sealing ring is made of rubber materials, and vacuum sealing is achieved through compression of the sealing ring.

Further, with continued reference to fig. 1-10, the diaphragm assembly 4 further includes a sapphire window 44 and a pressing plate 45, wherein the pressing plate 45 is fixed and pressed on the sapphire window 44, so that the sapphire window 44 abuts against the sealing ring, and the sapphire window 44 is set to be sapphire. Specifically, in order to realize holistic vacuum seal, sapphire window 44 and pressure strip 45 are installed to the centre at end cover 42, sapphire window 44 is compressed tightly through pressure strip 45, make sapphire window 44 and the sealing washer in the third depressed part of end cover 42 realize vacuum seal, the square hole has been seted up to the centre of pressure strip 45, the diameter of this square hole is greater than the size of neutron beam spot, pressure strip 45 is made by boron-aluminum alloy material, can absorb stray wearing-out neutron, sapphire material is higher to the transmissivity of neutron, therefore the loss that the sapphire window 44 was worn out to the neutron is very little. The diaphragm assembly 4 further comprises a retaining plate 46, and the retaining plate 46 is fixedly mounted on the outer end face of the end cover through screws.

Further, with continued reference to fig. 1-10, the neutron collimator structure further includes a fixing mechanism 6, the fixing mechanism 6 includes a sleeve 61 and a plurality of fixing claws 62, the sleeve 61 is sleeved on the first collimator 1, the plurality of fixing claws 62 are arranged on the outer circumferential surface of the sleeve 61 at intervals along the circumferential direction of the sleeve 61, and the fixing claws 62 are fixedly connected to the rib plate of the collimator chamber. Specifically, sleeve 61 is enclosed by rectangle pipe bottom plate, rectangle pipe left side board, rectangle pipe right side board and rectangle pipe roof and establishes and forms, all adopts stainless steel, and this sleeve 61 is installed in the positive middle part of first collimation pipe 1, and this sleeve 61 internal dimension is greater than the unilateral 5mm of external dimension of first collimation pipe 1 about slightly, and stationary dog 62 passes through bolt fixed connection with sleeve 61, and stationary dog 62 is used for connecting the gusset in collimation cabin.

Further, with continued reference to fig. 1 to 10, the fixing mechanism 6 further includes a plurality of adjusting bolts 63, the sleeve 61 is a rectangular tube, the peripheral wall of the sleeve 61 is provided with a plurality of mounting holes, the plurality of mounting holes are arranged at intervals along the peripheral direction of the sleeve 61, and the adjusting bolts 63 pass through the mounting holes and abut against the peripheral wall of the first collimator tube 1. Specifically, one adjusting bolt 63 is arranged on the top plate and the bottom plate of the rectangular tube, two adjusting bolts 63 are arranged on the left plate and the right plate of the rectangular tube, and all the adjusting bolts 63 abut against the outer peripheral wall of the first collimator tube 1. A plurality of target seats welded outside the first collimator 1 are measured through an erected tracker, and high-precision positioning of the first collimator 1 on a beam line is achieved through adjustment of the adjusting bolts 63.

Further, with reference to fig. 1 to 10, the fixing mechanism 6 further includes two limiting assemblies 64, the two limiting assemblies 64 are respectively disposed at two ends of the sleeve 61, each limiting assembly 64 includes an adjusting top wire 641 and a mounting plate 642, the mounting plate 642 is fixedly connected to the outer peripheral surface of the first collimator 1, and the adjusting top wire 641 penetrates through the mounting plate 642 and abuts against the sleeve 61. Specifically, one mounting plate 642 is installed respectively on the top surface both sides of first collimator 1, installs adjustment jackscrew 641 on every mounting plate 642, and adjustment jackscrew 641 supports tightly with the rectangular pipe roof, can realize adjusting and fix a position the spatial position of first collimator 1 through a plurality of adjusting bolt 63 and adjustment jackscrew 641.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A neutron collimator structure for mounting in a collimation compartment having a vacuum cavity, comprising:

the first collimating tube (1) is connected to the corrugated tube of the collimating cabin in a sealing mode, a first end of the first collimating tube (1) is communicated with the vacuum cavity of the collimating cabin, and a second end of the first collimating tube (1) is provided with a first protruding part;

the second collimator (2) is communicated with the first collimator (1), a second concave part and a second convex part are respectively arranged at two ends of the second collimator (2), and the first convex part of the first collimator (1) is in inserting fit with the second concave part of the second collimator (2);

the limiting plate (3) is arranged on the butt flange surfaces of the first collimator (1) and the second collimator (2), and the limiting plate (3) is used for limiting the relative rotation of the first collimator (1) and the second collimator (2);

the diaphragm assembly (4) comprises a diaphragm plate (41) and an end cover (42), wherein the end cover (42) is arranged on the second collimator (2), an arc-shaped groove (421) is formed in the end cover (42), the diaphragm plate (41) is inserted into the arc-shaped groove (421), and the arc surface of the diaphragm plate (41) is tightly abutted to the inner wall of the arc-shaped groove (421).

2. The neutron collimator structure of claim 1, wherein the number of the second collimator tubes (2) is multiple, the second protrusion of one of the second collimator tubes (2) of every two adjacent second collimator tubes (2) is inserted into the second recess of the other second collimator tube (2), the second collimator tube (2) comprises a shell (21) and a neutron absorbing tube (22), the outer peripheral wall of the neutron absorbing tube (22) is fixedly connected to the inner peripheral wall of the shell (21), the neutron absorbing tube (22) is made of boron-aluminum alloy material, and the shell (21) is made of aluminum alloy material.

3. The neutron collimator structure of claim 1, wherein the number of the limiting plates (3) is plural, and the plurality of the limiting plates (3) are arranged at intervals along the circumferential direction of the second collimator (2).

4. The neutron collimator structure of claim 1, further comprising a locking assembly (5), wherein the locking assembly (5) comprises a locking screw (51) and two installation seats (52), the installation seats (52) are arranged on the butt flange face, the installation seats (52) have connection holes, the locking screw (51) is sequentially inserted into the connection holes of the two installation seats (52), so that the two installation seats (52) lock the relative positions of the first collimator tube (1) and the second collimator tube (2).

5. The neutron collimator structure according to claim 1, characterized in that the diaphragm assembly (4) further comprises a retaining member (43), the side wall of the arc-shaped slot (421) is provided with a threaded hole, and the retaining member (43) passes through the threaded hole and abuts against the arc surface of the diaphragm plate (41).

6. The neutron collimator structure of claim 1, further comprising a seal ring, the end cap (42) being provided with a third recess, the seal ring being sandwiched between the second protrusion and the third recess.

7. The neutron collimator structure of claim 6, wherein the diaphragm assembly (4) further comprises a sapphire window (44) and a hold-down plate (45), the hold-down plate (45) being fixed and held down to the sapphire window (44) to hold the sapphire window (44) against the seal ring, the sapphire window (44) being provided as sapphire.

8. The neutron collimator structure according to claim 1, further comprising a fixing mechanism (6), wherein the fixing mechanism (6) comprises a sleeve (61) and a plurality of fixing claws (62), the sleeve (61) is sleeved on the first collimating tube (1), the plurality of fixing claws (62) are arranged on the outer circumferential surface of the sleeve (61) at intervals along the circumferential direction of the sleeve (61), and the fixing claws (62) are fixedly connected to rib plates of the collimating chamber.

9. The neutron collimator structure of claim 8, wherein the fixing mechanism (6) further comprises a plurality of adjusting bolts (63), the sleeve (61) is a rectangular tube, the peripheral wall of the sleeve (61) is provided with a plurality of mounting holes, the plurality of mounting holes are arranged at intervals along the peripheral direction of the sleeve (61), and the adjusting bolts (63) penetrate through the mounting holes and abut against the peripheral wall of the first collimator tube (1).

10. The neutron collimator structure of claim 8, wherein the fixing mechanism (6) further comprises two limiting assemblies (64), the two limiting assemblies (64) are respectively arranged at two ends of the sleeve (61), the limiting assemblies (64) comprise an adjusting jackscrew (641) and a mounting plate (642), the mounting plate (642) is fixedly connected to the outer peripheral surface of the first collimator tube (1), and the adjusting jackscrew (641) penetrates through the mounting plate (642) and abuts against the sleeve (61).

Images