CN216596972U - Horizontal switching mechanism of neutron diaphragm - Google Patents

Abstract

The utility model relates to the technical field of neutron scattering, and discloses a horizontal switching mechanism of a neutron diaphragm, which comprises a main body substrate, a neutron diaphragm plate, an adjusting assembly, a transmission assembly and a monitoring assembly, wherein the main body substrate is arranged on the adjusting assembly, the mounting height and the mounting angle of the main body substrate can be adjusted through the adjusting assembly, the neutron diaphragm plate is arranged on the main body substrate in a sliding manner, a plurality of second through holes for neutron beams to pass through are formed in the neutron diaphragm plate, the neutron diaphragm plate can slide to enable the neutron beams to pass through different second through holes, a first through hole is formed in the main body substrate, and the plurality of second through holes can be sequentially communicated with the first through hole in the sliding process of the neutron diaphragm plate. In addition, the transmission assembly is used for driving the neutron diaphragm plate to move, the monitoring assembly can monitor the position of the neutron diaphragm plate in real time and feed back a position signal to the transmission assembly, so that the neutron diaphragm plate can move accurately, and the horizontal switching mechanism of the neutron diaphragm plate has high adjusting precision.

Description

Horizontal switching mechanism of neutron diaphragm

Technical Field

The utility model relates to the technical field of neutron scattering, in particular to a horizontal switching mechanism of a neutron diaphragm.

Background

The small-angle neutron scattering is an experimental platform for researching the internal micro-scale structure of a substance by using a strictly collimated neutron beam, and has wide application in the aspects of new drug development, new energy, new materials and the like.

On an incident light path of the small-angle neutron scattering spectrometer, a plurality of diaphragm combinations with diameters becoming smaller from front to back are required to be installed to collimate incident neutrons, and the sizes and position accuracies of the front and rear neutron diaphragms directly influence the performance of a final neutron beam spot. For different experimental requirements, different shapes of diaphragm combinations sometimes need to be replaced to obtain different sizes of neutron beam spots. Moreover, for different application scenarios, the installation posture of the neutron diaphragm mechanism also needs to be adjusted, so that the opening on the neutron diaphragm is matched with the beam center.

Therefore, a neutron diaphragm horizontal switching mechanism is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a horizontal switching mechanism of a neutron diaphragm, which not only can realize free switching of different openings of the neutron diaphragm, but also can realize adjustment of different installation postures of the neutron diaphragm, and has the advantages of high adjustment precision, good stability and simple and convenient combination and installation.

As the conception, the technical scheme adopted by the utility model is as follows:

a neutron iris horizontal switching mechanism, comprising:

the main body substrate is provided with a first through hole;

the neutron diaphragm plate is provided with a plurality of second through holes and is arranged on the main body substrate in a sliding manner, so that any one of the second through holes can be communicated with the first through hole;

the adjusting component comprises a support and an adjusting piece, the adjusting piece is arranged on the support and can abut against the main body substrate, and the assembling distance between the adjusting piece and the support is adjustable, so that the relative position of the main body substrate and the support can be changed;

a transmission assembly configured to drive the neutron diaphragm plate to move;

a monitoring assembly in signal connection with the transmission assembly, the monitoring assembly configured to monitor a position of the neutron diaphragm plate.

Optionally, the adjusting part includes a first adjusting part and a second adjusting part, a mounting frame is arranged on the support, the main substrate is located in the mounting frame, the first adjusting part is arranged on the mounting frame relatively along a first direction and can be abutted to the main substrate, the second adjusting part is arranged on the mounting frame relatively along a second direction and can be abutted to the main substrate, the second adjusting part includes at least two groups and is arranged along the first direction at intervals, and the second direction is perpendicular to the first direction.

Optionally, the main body substrate comprises a main body substrate body and a mounting plate which are detachably connected, the main body substrate body and the mounting plate are connected through a mounting piece, the mounting plate can be abutted to the adjusting piece, and the mounting distance between the mounting piece and the mounting plate is adjustable, so that the relative position of the main body substrate body and the mounting plate can be changed.

Optionally, a target seat is further arranged on the neutron diaphragm plate, and the position of the target seat can be acquired by the tracker.

Optionally, the monitoring component includes a linear grating ruler and a reading head, the linear grating ruler is disposed on the neutron diaphragm plate, the reading head is disposed on the main substrate, and the reading head can read a value on the linear grating ruler.

Optionally, the transmission assembly comprises a motor, a screw rod and a screw nut, the motor is arranged on the main body substrate, one end of the screw rod is connected to the output end of the motor, and the other end of the screw rod is connected to the neutron diaphragm plate through the screw nut.

Optionally, a slide rail is further arranged on the main body substrate, a slide block is arranged on the neutron diaphragm plate, and the slide block can slide in the slide rail.

Optionally, the number of the slide rails is two, and the two slide rails are respectively located on two sides of the extending direction of the main body substrate.

Optionally, the neutron diaphragm horizontal switching mechanism further comprises a limiting assembly, and the limiting assembly is located at two ends of the sliding rail.

Optionally, the plurality of second through holes are uniformly distributed along the extending direction of the neutron diaphragm plate.

The utility model has the beneficial effects that:

the neutron diaphragm horizontal switching mechanism comprises a main body substrate, a neutron diaphragm plate, an adjusting assembly, a transmission assembly and a monitoring assembly, wherein the main body substrate is arranged on the adjusting assembly, the mounting height and the mounting angle of the main body substrate are adjusted through the adjusting assembly, the neutron diaphragm plate is arranged on the main body substrate in a sliding mode, a plurality of second through holes for neutron beam current to pass through are formed in the neutron diaphragm plate, the neutron diaphragm plate can pass through different second through holes by sliding the neutron diaphragm plate, a first through hole is formed in the main body substrate, and any second through hole can be communicated with the first through hole in the sliding process of the neutron diaphragm plate so as to prevent the neutron beam current from being blocked by the main body substrate. In addition, transmission assembly and monitoring subassembly are mutually supported, and transmission assembly is used for driving neutron diaphragm plate and removes, and monitoring subassembly real-time supervision neutron diaphragm plate's position to feed back position signal in transmission assembly, in order to realize the accurate removal of neutron diaphragm plate, make neutron diaphragm horizontal switching mechanism have high regulation precision.

Drawings

Fig. 1 is a schematic structural diagram of a first view angle of a neutron diaphragm horizontal switching mechanism according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second view angle of the neutron diaphragm horizontal switching mechanism according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third view angle of the neutron diaphragm horizontal switching mechanism according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fourth view angle of the neutron diaphragm horizontal switching mechanism according to the embodiment of the present invention.

In the figure:

1. a main body substrate; 11. a main body substrate body; 111. a first through hole; 12. mounting a plate; 121. mounting holes; 13. a mounting member; 14. a slide rail;

2. a neutron diaphragm plate; 21. a second through hole; 22. a target holder; 23. a slider;

3. an adjustment assembly; 31. a support; 32. an adjustment member; 321. a first adjustment member; 3211. a first outer hexagonal adjustment screw; 3212. a first socket head cap adjusting screw; 322. a second adjustment member; 3221. a second outer hexagonal adjusting screw; 3222. a second socket head cap adjusting screw;

4. a transmission assembly; 41. a motor; 42. a screw rod; 43. a feed screw nut; 44. a nut mounting seat; 45. a bearing seat; 46. a bearing seat mounting plate;

5. a monitoring component; 51. a linear grating ruler; 52. a reading head; 53. a reading head mounting plate;

6. a limiting component; 61. a limit switch; 62. and a limiting mounting plate.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

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, removably 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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 only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured 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.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

In order to facilitate the switching of different openings on the neutron diaphragm plate 2 and the combination of a plurality of neutron diaphragm plates 2, thereby satisfying various experimental requirements and different application scenarios, the embodiment provides a horizontal switching mechanism of neutron diaphragm, which is convenient to adjust, high in adjustment precision, good in stability and simple and convenient to combine and install.

As shown in fig. 1, the neutron diaphragm horizontal switching mechanism provided in this embodiment includes a main body substrate 1, a neutron diaphragm plate 2, an adjustment assembly 3, a transmission assembly 4, and a monitoring assembly 5. Because the neutron beam current needs to be collimated through the neutron diaphragm plate 2, namely the neutron beam current needs to pass through the opening formed in the neutron diaphragm plate 2, so that different openings are switched for meeting experimental requirements, and the neutron diaphragm plate 2 needs to be arranged to be movable. In this embodiment, the neutron diaphragm plate 2 is slidably disposed on the main body substrate 1, and then the main body substrate 1 is connected to the other components, so as to ensure stable installation of the horizontal switching mechanism of the neutron diaphragm.

In this embodiment, the main substrate 1 is connected to the adjusting assembly 3, wherein the adjusting assembly 3 includes a support 31 and an adjusting member 32, the adjusting member 32 is disposed on the support 31 and can abut against the main substrate 1, that is, when the adjusting member 32 abuts against the main substrate 1, the main substrate 1 can be relatively fixed to the support 31, and when the adjusting member 32 does not abut against the main substrate 1, the main substrate 1 can be separated from the support 31, thereby achieving detachable connection between the main substrate 1 and the adjusting assembly 3. Further, since the assembly distance between the adjusting member 32 and the support 31 is adjustable, even if the adjusting member 32 abuts against the main body substrate 1, the main body substrate 1 and the support 31 are not fixed at the same relative position every time, and it can be understood that the position of the support 31 is not changed, so that the position of the main body substrate 1 can be adjusted to meet the requirements of different experimental scenes.

As shown in fig. 2 and 4, the main substrate 1 is provided with a first through hole 111, the neutron diaphragm plate 2 is provided with a plurality of second through holes 21, the plurality of second through holes 21 are arranged at intervals, and when the neutron diaphragm plate 2 slides relative to the main substrate 1, the second through holes 21 can be communicated with the first through hole 111 one by one. In this embodiment, the neutron diaphragm plate 2 is parallel to the main body substrate 1, and the centers of the plurality of second through holes 21 are located on the same straight line and parallel to the straight line where the center of the first through hole 111 is located. Optionally, five second through holes 21 are provided, and the diameters or shapes of the five second through holes 21 are not consistent, so as to meet the requirements of diaphragm combinations of different experiments, as shown in fig. 1, in this embodiment, the first four second through holes 21 from left to right are round holes, and the diameters thereof are sequentially reduced, but the center distances of adjacent second through holes 21 are kept consistent, the fifth through hole is a square hole, and the setting of the second through holes 21 is mainly selected according to the requirements of actual experiments. The first through holes 111 are mainly disposed to allow neutron beams collimated by the neutron diaphragm 2 to pass through the body substrate 1, and therefore, the size or shape of the first through holes 111 may be set with reference to the second through holes 21, so that when the first through holes 111 communicate with the second through holes 21, the body substrate 1 does not prevent the neutron beams passing through the second through holes 21 from passing through the first through holes 111. Alternatively, the first through hole 111 and the second through hole 21 are formed by slow-cut wire cutting.

Optionally, the neutron diaphragm plate 2 is made of a neutron absorbing material, such as boron-aluminum alloy or cadmium, when the neutron beam stream hits the position of the neutron diaphragm plate 2 where the second through hole 21 is not disposed, the neutron is absorbed by boron or cadmium, and hits the position of the second through hole 21, the neutron can pass through the second through hole 21, so as to achieve the collimation effect of the neutron diaphragm plate 2, and pass through different second through holes 21, so as to form the required neutron beam spot.

In order to realize the sliding of the neutron diaphragm plate 2, the neutron diaphragm horizontal switching mechanism provided by the embodiment further comprises a transmission assembly 4 and a monitoring assembly 5. The transmission assembly 4 can enable the neutron diaphragm plate 2 to automatically move, manual adjustment is not needed, and the neutron diaphragm plate is convenient and fast to use. And monitoring subassembly 5 then is used for monitoring the position at neutron diaphragm plate 2 place, and monitoring subassembly 5 still can feed back the positional information of neutron diaphragm plate 2 to transmission assembly 4 moreover, and both cooperate each other to this realizes the accurate removal of automation of neutron diaphragm plate 2. The specific structure of the transmission assembly 4 and the monitoring assembly 5 will be described in detail below.

Alternatively, in order to adjust the relative position of the adjuster 32 and the main body substrate 1, a mounting frame is provided on the support 31 so that the main body substrate 1 can be located in the mounting frame, and the adjuster 32 is provided on the support 31 and can abut against the main body substrate 1. As shown in fig. 3, in the present embodiment, the support 31 includes a fixing portion and a mounting frame located on the fixing portion, and optionally, the mounting frame is a rectangular frame, and a portion of the main substrate 1 fixed to the support 31 may extend into the mounting frame. The adjusting member 32 includes a first adjusting member 321 and a second adjusting member 322, wherein the first adjusting member 321 is disposed opposite to the main body substrate 1 along the first direction, that is, the first adjusting member 321 is disposed through two opposite frames of the mounting frame in the first direction. Specifically, the first adjusting member 321 includes a first outer hexagonal adjusting screw 3211 and a first inner hexagonal adjusting screw 3212, wherein the first outer hexagonal adjusting screw 3211 is disposed on the lower frame, the first inner hexagonal adjusting screw 3212 is disposed on the lower frame, and is respectively in threaded connection with the upper and lower frames, and the first outer hexagonal adjusting screw 3211 and the first inner hexagonal adjusting screw 3212 are rotated to adjust the position of the main body substrate 1 in the first direction, i.e., the mounting height of the main body substrate 1 can be changed.

Similarly, the second adjusting member 322 is disposed opposite to the main substrate 1 along the second direction, that is, the second adjusting member 322 is disposed through two opposite frames of the mounting frame in the second direction. Specifically, the second adjusting element 322 includes a second outer hexagonal adjusting screw 3221 and a second inner hexagonal adjusting screw 3222, wherein the second outer hexagonal adjusting screw 3221 is disposed through the left side frame, the second inner hexagonal adjusting screw 3222 is disposed through the right side frame, and is respectively in threaded connection with the left and right side frames, and the position of the main body substrate 1 can be adjusted in the second direction by rotating the second outer hexagonal adjusting screw 3221 and the second inner hexagonal adjusting screw 3222. Moreover, the second adjusting members 322 have at least two sets, as shown in fig. 3, the second adjusting members 322 are disposed on the left and right side frames at intervals along the first direction and are divided into an upper second adjusting member and a lower second adjusting member, when the mounting frame is a rectangular frame, if the mounting distances of the upper second adjusting member and the lower second adjusting member to the support 31 are consistent, the main substrate 1 is parallel to the side frame of the support 31, and if the mounting distances of the upper second adjusting member and the lower second adjusting member to the support 31 are inconsistent, the main substrate 1 is not parallel to the side frame of the support 31. It is needless to say that if the mounting inclination angle of the main body substrate 1 is to be changed, the upper second adjustment member and the lower second adjustment member may be adjusted, and if the difference in the length of the upper second adjustment member and the lower second adjustment member on one side is larger, the mounting inclination angle of the main body substrate 1 is larger. The first direction is the ab direction in fig. 3, the second direction is the cd direction in fig. 3, and the first direction and the second direction are perpendicular to each other.

In addition, as shown in fig. 2, the main substrate 1 includes a main substrate body 11 and a mounting plate 12 that are detachably connected, in this embodiment, the main substrate body 11 is mainly used for mounting the neutron diaphragm plate 2, the transmission assembly 4 and the monitoring assembly 5, and the mounting plate 12 is used for mounting the main substrate body 11 and the adjustment assembly 3. Specifically, the mounting plate 12 abuts against the first adjusting member 321 and the second adjusting member 322, in this embodiment, the mounting plate 12 is a rectangular plate, and both the length and the width of the rectangular plate are smaller than the inner length and the inner width of the mounting frame, so that the mounting plate can be completely placed inside the mounting frame, and can be relatively fixed with the mounting frame through the adjusting member 32, and the lengths of the first outer hexagonal adjusting screw 3211 and the first inner hexagonal adjusting screw 3212 abutting against both sides of the mounting plate 12 in the first direction, which extend into the mounting frame, can be changed, when the length of the first outer hexagonal adjusting screw 3211 extending into the mounting frame gradually increases, the mounting position of the main substrate 1 gradually moves upward, and certainly, the length of the first inner hexagonal adjusting screw 3212 extending into the mounting frame, which extends into the mounting frame, is gradually reduced, and the adjusting mode of the second adjusting member 322 is the same. The inclination angle of the main substrate body 11 can be changed by adjusting the assembly distance between the second outer hexagonal adjusting screw 3221 and the second inner hexagonal adjusting screw 3222 and the mounting plate 12, so as to adjust the relative position between the neutron diaphragm plate 2 and the neutron beam. In addition, the mounting plate 12 includes two mounting plates respectively disposed at two ends of the main body 11, and the adjusting components 3 are also disposed opposite to each other at two ends of the main body 11.

After the neutron diaphragm plate 2, the main body substrate 1 and the support 31 are installed, the target seat 22 on the neutron diaphragm plate 2 can be detected by a tracker to ensure that the installation position is correct. Specifically, four target holders 22 are arranged in the circumferential direction of the neutron diaphragm plate 2, and the accurate position of the neutron diaphragm plate 2 on the neutron beam streamline can be reversely deduced by measuring the positions of the four target holders 22 through a tracker.

The position of the neutron diaphragm plate 2 relative to the main body substrate 1 needs to utilize the monitoring component 5, as shown in fig. 4, in this embodiment, the monitoring component 5 includes a linear grating ruler 51 and a reading head 52, the linear grating ruler 51 is disposed on the neutron diaphragm plate 2, and the reading head 52 is disposed on the main body substrate 1, when the linear grating ruler 51 moves along with the neutron diaphragm plate 2, a value on the linear grating ruler 51 monitored by the reading head 52 will also represent the moving position of the neutron diaphragm plate 2. Optionally, during initial setting, the position of each second through hole 21 on the neutron diaphragm plate 2 when concentrically coinciding with the first through hole 111 may be recorded, and when subsequently driving the neutron diaphragm plate 2, which second through hole 21 concentrically coincides with the first through hole 111 or whether the second through hole 21 concentrically coincides with the second through hole 21 may be determined by comparing the monitored value on the linear grating scale 51 with a preset value. Optionally, the monitoring assembly 5 further comprises a reading head mounting plate 53, and the reading head 52 is connected to the main body substrate 1 through the reading head mounting plate 53.

The neutron diaphragm plate 2 is driven by a transmission assembly 4, the transmission assembly 4 comprises a motor 41, a screw rod 42 and a screw rod nut 43, the motor 41 serves as a power component and can drive the screw rod 42 to rotate, one end of the screw rod 42 is connected to the output end of the motor 41, and the other end of the screw rod 42 is matched with the screw rod nut 43 to convert circumferential rotation into horizontal movement. Specifically, as shown in fig. 3, the motor 41 is located below the main body substrate 1, and is connected to one end of the lead screw 42 through a bearing housing 45, and the bearing housing 45 is connected to the main body substrate 1 through a bearing housing fixing plate 46, so that the motor 41 is fixed to the main body substrate 1. In addition, the lead screw nut 43 is connected to the neutron diaphragm 2 through a nut attachment seat 44. With this arrangement, it is realized that when the output end of the motor 41 fixed on the main body substrate 1 rotates circumferentially, the screw rod 42 can convert the circumferential rotation into movement through the screw rod nut 43, and drives the neutron diaphragm plate 2 to move through the nut mounting seat 44. Alternatively, the screw 42 is a ball screw.

In order to facilitate the movement of the neutron diaphragm plate 2, the main body substrate 1 is further provided with a slide rail 14, and the neutron diaphragm plate 2 is provided with a slide block 23. Optionally, the number of the slide rails 14 is two, and the two slide rails are respectively disposed on two sides of the extension direction of the main substrate 1, and the number of the slide blocks 23 is also two, and when the nut mounting base 44 drives the neutron diaphragm plate 2 to move, the slide blocks 23 can slide in the slide rails 14, so as to always ensure that the neutron diaphragm plate 2 and the main substrate 1 are arranged in parallel.

Furthermore, the neutron diaphragm horizontal switching mechanism provided by this embodiment further includes a limiting assembly 6, where the limiting assembly 6 is located at two ends of the slide rail 14. Optionally, the limit component 6 includes a limit switch 61 and a limit mounting plate 62, the limit switch 61 is disposed on the limit mounting plate 62, and the limit mounting plate 62 is fixed relative to the main body substrate 1. The limit switch 61 at least includes a first limit switch and a second limit switch, and when the first limit switch is disposed at one end of one slide rail 14, the second limit switch is disposed at the other end of the slide rail 14, or disposed at a corresponding position of another slide rail 14 at the other end.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the utility model, which changes and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A neutron diaphragm horizontal switching mechanism, comprising:

the device comprises a main body substrate (1), wherein a first through hole (111) is formed in the main body substrate (1);

the neutron diaphragm plate (2) is provided with a plurality of second through holes (21), and the neutron diaphragm plate (2) is arranged on the main body substrate (1) in a sliding mode so that any one of the second through holes (21) can be communicated with the first through hole (111);

the adjusting assembly (3) comprises a support (31) and an adjusting piece (32), the adjusting piece (32) is arranged on the support (31) and can abut against the main body substrate (1), and the assembling distance between the adjusting piece (32) and the support (31) is adjustable, so that the relative position of the main body substrate (1) and the support (31) can be changed;

a transmission assembly (4), wherein the transmission assembly (4) is configured to drive the neutron diaphragm plate (2) to move;

a monitoring assembly (5) in signal connection with the transmission assembly (4), the monitoring assembly (5) being configured to monitor a position of the neutron diaphragm plate (2).

2. The neutron diaphragm horizontal switching mechanism of claim 1, wherein the adjusting member (32) comprises a first adjusting member (321) and a second adjusting member (322), a mounting frame is disposed on the support (31), the main body substrate (1) is disposed in the mounting frame, the first adjusting member (321) is disposed on the mounting frame along a first direction and can abut against the main body substrate (1), the second adjusting member (322) is disposed on the mounting frame along a second direction and can abut against the main body substrate (1), the second adjusting member (322) comprises at least two groups and is disposed along the first direction at an interval, and the second direction is perpendicular to the first direction.

3. The neutron diaphragm horizontal switching mechanism of claim 1, wherein the main body substrate (1) comprises a main body substrate body (11) and a mounting plate (12) which are detachably connected, the main body substrate body (11) and the mounting plate (12) are connected through a mounting piece (13), the mounting plate (12) can be abutted with the adjusting piece (32), and the assembly distance between the mounting piece (13) and the mounting plate (12) is adjustable, so that the relative position of the main body substrate body (11) and the mounting plate (12) can be changed.

4. The neutron diaphragm horizontal switching mechanism according to claim 1, wherein the neutron diaphragm plate (2) is further provided with a target holder (22), and the position of the target holder (22) can be acquired by a tracker.

5. The neutron diaphragm horizontal switching mechanism according to claim 1, wherein the monitoring assembly (5) comprises a linear grating ruler (51) and a reading head (52), the linear grating ruler (51) is disposed on the neutron diaphragm plate (2), the reading head (52) is disposed on the main body substrate (1), and the reading head (52) can read a value on the linear grating ruler (51).

6. The neutron diaphragm horizontal switching mechanism of claim 1, wherein the transmission assembly (4) comprises a motor (41), a lead screw (42) and a lead screw nut (43), the motor (41) is disposed on the main body substrate (1), one end of the lead screw (42) is connected to an output end of the motor (41), and the other end of the lead screw is connected to the neutron diaphragm plate (2) through the lead screw nut (43).

7. The horizontal switching mechanism of neutron diaphragm according to claim 1, wherein a slide rail (14) is further disposed on the main substrate (1), a slide block (23) is disposed on the neutron diaphragm plate (2), and the slide block (23) can slide in the slide rail (14).

8. The neutron diaphragm horizontal switching mechanism of claim 7, wherein there are two slide rails (14), and the two slide rails (14) are respectively located at two sides of the extending direction of the main body substrate (1).

9. The neutron iris horizontal switching mechanism of claim 7, further comprising a limiting assembly (6), wherein the limiting assembly (6) is located at both ends of the slide rail (14).

10. The neutron diaphragm horizontal switching mechanism of claim 1, wherein a plurality of the second through holes (21) are uniformly distributed along the extension direction of the neutron diaphragm plate (2).

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