CN119620213A - Radiographic inspection system - Google Patents

Abstract

The embodiment of the disclosure provides a radiation inspection system, which comprises a radiation source device (1) comprising a first fixed platform (11) and a radiation source (10), wherein the first fixed platform (11) is configured to support the radiation source (10), the radiation source (10) is configured to emit a radiation beam, the installation position and/or the installation posture of the radiation source (10) relative to the first fixed platform (11) are adjustable, and a detection device (2) comprising a second fixed platform (21) and a detection assembly (28), the second fixed platform (21) is configured to support the detection assembly (28), the detection assembly (28) is configured to receive the radiation beam, the installation position and/or the installation posture of the detection assembly (28) relative to the second fixed platform (21) are adjustable, wherein the detection assembly (28) and the radiation source (10) are oppositely arranged along a first direction (x), and an inspection channel for an inspected object (6) to pass is formed between the radiation source device (1) and the detection device (2).

Description

Radiographic inspection system

Technical Field

The present disclosure relates to the field of radiation detection technology, and in particular, to a radiation inspection system.

Background

A radiation inspection system for performing radiation inspection of a container, cargo or other item within a vehicle includes a radiation source for emitting radiation through an object to be inspected and a detector for receiving a radiation beam for imaging, an inspection path being formed between the radiation source and the detector for passing the object to be inspected. The objects such as containers and vehicles pass through the fan-shaped ray beam surface formed by rays in the process of passing through the inspection channel, and the ray beams continuously scan the objects such as the containers and the vehicles.

In the current radiographic inspection system, the distance between the radiographic source and the detector and the distance between the radiographic source and the detector are generally fixed, and cannot meet the detection requirements of diversity.

Disclosure of Invention

The present disclosure provides a radiographic inspection system that can accommodate more detection conditions.

The present disclosure provides a radiographic inspection system comprising:

A radiation source device comprising a first fixed platform and a radiation source, wherein the first fixed platform is configured to support the radiation source, the radiation source is configured to emit a radiation beam, the mounting position and/or mounting posture of the radiation source relative to the first fixed platform are adjustable, and

The detection device comprises a second fixed platform and a detection assembly, wherein the second fixed platform is configured to support the detection assembly, the detection assembly is configured to receive the ray beam, and the installation position and/or the installation posture of the detection assembly relative to the second fixed platform are adjustable;

the detection assembly and the ray source are oppositely arranged along the first direction, and an inspection channel for the checked object to pass through is formed between the ray source device and the detection device.

In some embodiments, the radiation source device further comprises:

the first movable platform is movably arranged above the first fixed platform along the first direction;

the ray source is arranged on the first movable platform.

In some embodiments, the radiation source device further comprises:

and the first guiding mechanism is connected between the first fixed platform and the first movable platform and is configured to provide guiding for the movement of the first movable platform.

In some embodiments, the first guide mechanism comprises:

At least two first guide rails arranged at intervals along a second direction, the first guide rails extending along a first direction and the second direction being perpendicular to the first direction, and

The first sliding parts are matched with the at least two first guide rails in a one-to-one correspondence manner, and can slide along the first guide rails;

the first movable platform is connected with at least two first sliding pieces.

In some embodiments, the radiation source device further comprises a first drive mechanism comprising:

the first power piece is arranged on the first fixed platform and is configured to provide a rotary driving force;

a first screw rod extending along a first direction and rotatably arranged on the first fixed platform around the axis thereof, one end of the first screw rod being connected with the output end of the first power member, and

The first nut is screwed on the first lead screw and connected with the first movable platform.

In some embodiments, the radiation source device further includes a base, the base is disposed on the first movable platform, and the radiation source is mounted on the first movable platform through the base.

In some embodiments, the radiation source device further comprises a first mount through which the radiation source is mounted to the base.

In some embodiments, the first bracket comprises:

a carrier configured to mount the radiation source, and

The support legs are connected between the base and the bearing part.

In some embodiments, the base extends beyond the first movable platform in a first direction proximate an end of the examination path, and at least a portion of the first support is located on the extended portion of the base.

In some embodiments, the radiation source device further comprises a collimator disposed on the first support, and the alignment accuracy of the radiation source and the collimator is configured to be ensured by the machining accuracy of the first support.

In some embodiments, a guide pin may be disposed on the base, with an axis of the guide pin extending in a height direction and passing through a target point of the radiation source, and the first bracket is positioned by the guide pin and rotatable about the axis of the guide pin to adjust a rotation angle of the radiation source.

In some embodiments, the radiation source apparatus further comprises a collimator and a shield disposed between the collimator and the radiation source, the shield configured to shield the radiation beam.

In some embodiments, the source device further comprises a first bracket, and the source is mounted to the first bracket and the pitch angle is adjustable.

In some embodiments, the radiation source device further comprises a collimator comprising:

mounting plate, and

The two collimating plates are arranged on the mounting plate, a gap extending along the height direction is formed between the two collimating plates, and the mounting positions of the two collimating plates along the second direction relative to the vertical central plane of the ray bundle can be synchronously adjusted so as to adjust the width of the gap, and the second direction is perpendicular to the first direction.

In some embodiments, the detection device further comprises:

the second movable platform is movably arranged above the second fixed platform along the first direction;

Wherein, the detection component is arranged on the second movable platform.

In some embodiments, the detection device further comprises:

And the second guiding mechanism is connected between the second fixed platform and the second movable platform and is configured to provide guiding for the movement of the second movable platform.

In some embodiments, the second guide mechanism comprises:

At least two second guide rails arranged at intervals along a second direction, the second guide rails extending along a first direction, the second direction being perpendicular to the first direction, and

The second sliding parts are matched with the second guide rails one by one and can slide along the second guide rails;

The second movable platform is connected with at least two second sliding pieces.

In some embodiments, the detection device further comprises a second drive mechanism comprising:

The second power piece is arranged on the second fixed platform and is configured to provide a rotary driving force;

A second screw rod extending along the first direction and rotatably arranged on the second fixed platform around the axis thereof, one end of the second screw rod being connected with the output end of the second power member, and

The second nut is screwed on the second lead screw and is connected with the second movable platform.

In some embodiments, the detection device further comprises:

the second support is arranged on the second movable platform and is configured to bear the detection assembly.

In some embodiments, the detection device further comprises:

a connecting seat arranged on the second bracket and

The second driving mechanism is configured to drive the second bracket to move along a second direction, and the second direction is perpendicular to the first direction.

In some embodiments, the detection device further comprises:

a connecting seat arranged on the second bracket and

The third driving mechanism is arranged on the connecting seat and is provided with an output shaft, the output shaft extends along the first direction, the output shaft is connected with the detecting assembly along the middle area of the length direction of the detecting assembly, and the third driving mechanism is configured to drive the detecting assembly to rotate around the axis of the output shaft in a vertical plane so as to align the strip-shaped detecting assembly with the ray bundle.

In some embodiments, the third drive mechanism comprises:

the third power piece is arranged on the connecting seat and is configured to provide a rotation driving force;

the speed reducer is connected to the output end of the third power piece and outputs rotary motion through the output shaft.

In some embodiments, the detection assembly comprises:

Mounting arm support, and

The detectors are arranged on the mounting arm support along the height direction and are detachable.

According to the ray inspection system, the ray source and the detection assembly are both arranged to be of a structure with adjustable installation positions and/or installation postures, and the positions of the ray source and the detection assembly can be conveniently adjusted according to detection requirements, so that the range of ray beams is suitable for different inspected objects, or better detection indexes are obtained for different inspected objects. Therefore, the ray inspection system can adapt to different detection working conditions and has stronger universality.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a side view of some embodiments of the radiographic inspection system of the present disclosure.

Fig. 2 is a top view of some embodiments of the radiographic inspection system of the present disclosure.

Fig. 3 is a side view of some embodiments of a radiation source device in a radiation inspection system of the present disclosure.

Fig. 4 is a top view of some embodiments of a radiation source device in a radiation inspection system of the present disclosure.

Fig. 5 is a schematic view of the mounting structure of the radiation source, the shield box and the collimator.

Fig. 6 is a side view of some embodiments of a detection device in a radiographic inspection system of the present disclosure.

Fig. 7 is a top view of some embodiments of a detection device in a radiographic inspection system of the present disclosure.

Description of the reference numerals

1. A radiation source device; 10, a ray source, 11, a first fixed platform, 12, a first guide rail, 13, a first lead screw, 14, a first sliding piece, 15, a first power piece, 16, a first movable platform, 17, a base, 18, a first bracket, 181, a bearing part, 182, a supporting leg, 19, a protective piece, 20, a collimator, 201, a mounting plate, 202 and a collimation plate;

2. a detection device; 21, a second fixed platform, 22, a second guide rail, 23, a second lead screw, 24, a second sliding piece, 25, a second movable platform, 26, a second bracket, 27, a connecting seat, 28, a detection assembly, 281, an installation arm support, 282, a detector, 29, a second power piece, 40, a third power piece, 41, a speed reducer and 50, a second driving mechanism;

3. 31, a supporting platform;

x, a first direction, y, a second direction, and z, a height direction.

Detailed Description

Embodiments of the present disclosure are described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the disclosure and are not intended to limit the scope of the disclosure, i.e., the disclosure is not limited to the embodiments described.

In the description of the embodiments of the present disclosure, the term "plurality" refers to two or more (including two), and similarly, "plurality of sets" refers to two or more (including two).

The description of the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outer", etc. is used for convenience of description of the present disclosure only, and is not intended to indicate or imply that the apparatus referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present disclosure.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the disclosure.

In the description of the present disclosure, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, or may be directly connected or indirectly connected via an intermediary. The specific meaning of the terms in the present disclosure may be understood as appropriate by those of ordinary skill in the art.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least some embodiments of the disclosure. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

As shown in fig. 1-7, in some embodiments, the radiographic inspection system of the present disclosure includes:

The radiation source device 1 comprises a first fixed platform 11 and a radiation source 10, wherein the first fixed platform 11 is configured to support the radiation source 10, the radiation source 10 is configured to emit a radiation beam, the installation position and/or installation posture of the radiation source 10 relative to the first fixed platform 11 are adjustable, and

The detection device 2 comprises a second fixed platform 21 and a detection assembly 28, wherein the second fixed platform 21 is configured to support the detection assembly 28, the detection assembly 28 is configured to receive the ray beam, and the installation position and/or the installation posture of the detection assembly 28 relative to the second fixed platform 21 are adjustable;

Wherein the detection assembly 28 and the radiation source 10 are oppositely arranged along the first direction x, and an inspection channel for the object 3 to pass through is formed between the radiation source device 1 and the detection device 2.

In particular, the radiation beam emitted by the radiation source 10 is gradually spread outwards in a direction away from the radiation source 10 to form a fan-shaped radiation beam, i.e. the cross-section of the fan-shaped radiation beam is gradually increased in a direction away from the emission end. The radiation source device 1 further comprises a collimator 20 arranged at a radiation emission end of the radiation source 10, the collimator 20 having a strip slit allowing radiation to pass through, only radiation of the radiation beam emitted by the radiation source 10, which is opposite to the strip slit of the collimator 20, being outwardly emitted, whereby the radiation beam passing through the collimator 20 forms a fan shape, which fan shape lies in a vertical plane and which projection in a horizontal plane is a straight line, which straight line extends in the first direction x.

The first stationary platform 11 may be disposed on the ground and include a platform plate and a plurality of legs disposed at the bottom of the platform plate for supporting the platform plate, and the radiation source 10 may be mounted to the first stationary platform 11 directly or indirectly through other means. Or the first fixed platform 11 may be a flat plate structure. The mounting position of the radiation source 10 relative to the first stationary platform 11 is adjustable in the first direction x, the second direction y, the height direction z and/or other directions to change the mounting position of the radiation source 10 on the first stationary platform 11. Or the mounting posture of the radiation source 10 is adjustable to change the beam-out state of the radiation beam in the case that the mounting position of the radiation source 10 is fixed.

As shown in fig. 6, the detecting assembly 28 may include a mounting arm 281 and a plurality of detectors 282, and the plurality of detectors 282 are disposed on the mounting arm 281 along a height direction z. The detecting element 28 is in the shape of a strip extending in the height direction z, and when the beam is aligned with the detectors 282, that is, the projection of the fan-shaped beam on the plurality of detectors 282 coincides with the length direction of the plurality of detectors 282, and when the width direction of the detectors 282 is aligned with the plurality of detectors 282, the intensity of the radiation detected by the plurality of detectors 282 is the largest, and accordingly, the detection effect is the best. In some embodiments, the detector 282 includes a plurality of crystals of the inductive rays arranged in an array.

The second stationary platform 21 may be a flat plate or a bracket structure, and the mounting position of the detection assembly 28 relative to the second stationary platform 21 may be adjustable in the first direction x, the second direction y, the height direction z, and/or other directions to change the mounting position of the detection assembly 28 on the second stationary platform 21. Or the mounting posture of the detection assembly 28 can be adjusted to change the alignment state with the radiation beam with the mounting position of the detection assembly 28 fixed.

At the time of the radiation inspection, as shown in fig. 1 and 2, the radiation source device 1 and the detecting device 2 are arranged at intervals along the first direction x, an inspection channel for the object 3 to pass through is formed between the radiation source device 1 and the detecting device 2, the object 3 moves relatively in the inspection channel, and the detector 282 is used for receiving the radiation emitted by the radiation source 10 to image the object 3. The object 3 may be a cargo in a vehicle, a container, or the like. The subject 3 can be carried by the support platform 31. For example, such a radiographic inspection apparatus may be used for performing security inspection on the subject 3.

In one embodiment, the first fixed platform 11 and the second fixed platform 21 may be fixed on the ground, where the object 3 is carried by a support platform 31 that is movable along a second direction y, and the second direction y is perpendicular to the first direction x, so that the object 3 moves relatively to the radiation source 10 and the detecting component 28, and the support platform 31 may be, for example, a truck chassis, an automatic guided vehicle, or a trolley capable of running along a rail. This configuration more easily ensures the accuracy of the alignment of the radiation source 10 with the detection assembly 28.

In another structural form, the first fixed platform 11 and the second fixed platform 21 can move along the second direction y, and at this time, the object 3 can be in a static state or a moving state, so that the object 3, the radiation source 10 and the detection assembly 28 can move relatively.

In this embodiment, the radiation source 10 and the detection assembly 28 are both configured with an adjustable installation position and/or an adjustable installation posture, so that the positions of the radiation source 10 and the detection assembly 28 can be conveniently adjusted according to the detection requirements, so that the range of the radiation beam is adapted to different objects 3 to be detected, or better detection indexes are obtained for different objects 3 to be detected. Therefore, the radiation inspection system can adapt to different detection working conditions and has stronger universality.

In some embodiments, as shown in fig. 3 and 4, the radiation source device 1 further comprises a first movable platform 16 movably arranged above the first fixed platform 11 along the first direction x, wherein the radiation source 10 is arranged on the first movable platform 16.

Specifically, the first fixed platform 11 and the first movable platform 16 may be rectangular or other shaped platforms, the first movable platform 16 may be disposed above the first fixed platform 11 at intervals to reduce friction force during movement, and the first movable platform 16 may be moved by manual force applied by an operator, or preferably, the position of the first movable platform 16 is automatically adjusted by means of electric driving. The first movable platform 16 is generally smaller in area than the first fixed platform 11, and in particular, the first movable platform 16 is smaller in size in both the first direction x and the second direction y than the first fixed platform 11.

As shown in fig. 1, a first distance L1 is provided between the center of the radiation source 10 (e.g., the target point of the radiation source 10) and the side of the object 3 near the radiation source 10, which is referred to as the source object distance, and a second distance L2 is provided between the center of the radiation source 10 and the detection surface of the detector 282, which is referred to as the source probe distance. When the radiation source 10 moves the adjustment position along the first direction x, the first distance L1 can be changed, when the first distance L1 increases, that is, the radiation source 10 is far away from the object 3, the height range of the beam at the position of the object 3 increases, and a higher object 3 can be detected, and when the first distance L1 decreases, that is, the radiation source 10 is close to the object 3, the imaging quality is improved. Thus, during the actual examination, the position of the first movable platform 16 may be adjusted as desired to bring the radiation source 10 into a suitable position in the first direction x.

In this embodiment, the position of the radiation source 10 is adjusted in the first direction x by setting the first movable platform 16, so that the first distance L1 between the radiation source 10 and the object 3 can be changed, in the actual detection process, the position of the radiation source 10 can be quickly and conveniently adjusted according to the detection requirement, the range of the radiation beam can be adapted to the height of the object 3, and better detection indexes can be obtained for different objects 3, and in addition, when the radiation source 10 of different types or sizes is replaced, the position of the radiation source 10 along the first direction x can be adjusted to adapt to the detection requirement. Therefore, the radiation source device can adapt to different detection working conditions and has stronger universality.

In some embodiments, the radiation source device 1 further comprises a first guiding mechanism coupled between the first stationary platform 11 and the first movable platform 16, configured to provide guiding of the movement of the first movable platform 16.

In this embodiment, by providing the guide mechanism between the first fixed platform 11 and the first movable platform 16, the first movable platform 16 can be prevented from shaking during the movement along the first direction x, so that the position adjustment precision of the radiation source 10 is improved, and even if the position of the radiation source 10 is adjusted along the first direction x, the radiation source 10 can be aligned with the detection assembly 28, so that the imaging precision is ensured, and the radiation detection precision is improved.

In some embodiments, as shown in fig. 4, the first guiding mechanism comprises:

At least two first guide rails 12 arranged at intervals along a second direction y, the first guide rails 12 extending along a first direction x, the second direction y being perpendicular to the first direction x, and

At least two first sliding members 14, which are matched with at least two first guide rails 12 in a one-to-one correspondence manner, wherein the first sliding members 14 can slide along the first guide rails 12;

wherein the first movable platform 16 is connected to at least two first slides 14.

As shown in fig. 3, for the same first rail 12, at least two first sliders 14 may be disposed at intervals along the first direction x to improve the support stability.

The embodiment realizes the guiding of the first movable platform 16 through the cooperation of the first sliding piece 14 and the first guide rail 12, has simple structure, stable sliding, difficult clamping stagnation occurrence and strong bearing capacity, can adapt to the bearing of various types of ray sources, and can realize stable bearing effect on heavy-duty ray sources.

In some embodiments, as shown in fig. 4, the radiation source device 1 further comprises a first driving mechanism comprising:

a first power member 15 provided to the first fixed platform 11 and configured to provide a rotational driving force;

a first screw rod 13 extending in a first direction x and rotatably provided to the first fixed platform 11 about its own axis, one end of the first screw rod 13 being connected to an output end of the first power member 15, and

The first nut is screwed on the first screw rod 13 and is connected to the first movable platform 16.

The first power element 15 may be a motor or a motor, and may be disposed at an end of the first fixed platform 11 near the object 3 along the first direction x. The two ends of the first screw rod 13 can be supported on the first fixed platform 11 through mounting seats, and the first nut can be connected to the bottom of the first movable platform 16.

For example, the first guide rails 12 may be arranged in two at intervals along the second direction y, and the first lead screw 13 is arranged between the two first guide rails 12 along the second direction y, and more preferably, is located at a middle position of the two first guide rails 12, so that not only can stable guiding be provided by the two first guide rails 12 in a region of the first movable platform 16 near two ends along the second direction y, but also the first movable platform 16 can be driven to move by a ball screw mechanism formed by the middle first lead screw 13 and the first nut, so that the first movable platform 16 is prevented from deflecting in the moving process, the position adjustment precision of the radiation source 10 is improved, and clamping stagnation is not easy to occur.

In this embodiment, the first power member 15 drives the ball screw mechanism to move, so that the position of the radiation source 10 is adjusted, and the first distance L1 between the radiation source 10 and the object 3 can be automatically adjusted, so that the adjustment accuracy is high, and the operation is convenient. Moreover, the ball screw mechanism has the advantages of high transmission precision, good running stability, high transmission efficiency, strong load bearing capacity, high reliability, difficult occurrence of faults and the like.

In some embodiments, as shown in fig. 3, the radiation source device 1 further includes a base 17, where the base 17 is disposed on the first movable platform 16, and the radiation source 10 is mounted on the first movable platform 16 through the base 17.

The base 17 may also have a rectangular shape, and the area of the base 17 may be smaller than that of the first movable platform 16. For example, the base 17 may be fixedly arranged on the first movable platform 16, or the base 17 may be movable relative to the first movable platform 16 along the first direction x, so that the position of the radiation source 10 along the first direction x can be doubly adjusted by the first movable platform 16 and the base 17, when in use, the position of the radiation source 10 is preliminarily adjusted by the first movable platform 16, so that the first power member 15 can operate at a faster speed, the position adjustment efficiency is improved, and the position of the radiation source 10 is adjusted by moving the base 17 at a lower speed even if the position is adjusted in place, and the position adjustment precision is improved.

This embodiment can improve the mounting accuracy of the radiation source 10 by improving the processing accuracy of the base 17 by providing the base 17 on the first movable platform 16 in consideration of the difficulty in securing high processing accuracy of the upper surface of the first movable platform 16. In addition, for the radiation sources 10 with different types and sizes, different mounting interfaces can be arranged on the base 17 so as to meet the mounting universality of the radiation sources 10, and the first movable platform 16 does not need to be replaced at this time, so that the universality of the first movable platform 16 can be improved.

In some embodiments, the radiation source device 1 further comprises a first support 18, by means of which first support 18 the radiation source 10 is mounted to the base 17.

Since the radiation source 10 is generally required to be matched with the collimator 20, the first bracket 18 is provided in this embodiment, so that the radiation source 10 and the collimator 20 are conveniently mounted on the first bracket 18, and the alignment accuracy after mounting is conveniently improved.

In some embodiments, the first bracket 18 comprises:

A carrier portion 181 configured to mount the radiation source 10, and

The plurality of support legs 182 are connected between the base 17 and the carrying portion 181.

The carrying portion 181 may be a plate structure, and a bottom portion thereof may be connected to a plurality of supporting legs 182, for example, the carrying portion 181 is rectangular, and four corner positions are respectively provided with one supporting leg 182. Alternatively, the first support 18 can also be designed as a plate-like structure.

This embodiment can reduce the height of the first support 18 on the basis of satisfying the installation height of the radiation source 10, or by providing a plurality of support legs 182, it is more convenient to finish the bottom surfaces of the support legs 182, so as to improve the positioning accuracy of the first support 18 on the base 17, thereby improving the installation accuracy of the radiation source 10.

In some embodiments, as shown in fig. 1, the base 17 extends beyond the first movable platform 16 in the first direction x near an end of the examination path, and at least a portion of the first support 1 is located on the extended portion of the base 17.

For example, an end of the base 17 adjacent to the examination path in the first direction x exceeds the outer edge of the first movable platform 16, and an end of the base 17 remote from the examination path in the first direction x is retracted inwardly with respect to the first movable platform 16, corresponding to biasing the base 17 in the first direction x with respect to the first movable platform 16 towards one side of the examination path.

According to the embodiment, on the basis that a certain adjustment distance of the radiation source 10 is realized through movement of the first movable platform 16, the base 17 is offset relative to the first bracket 1, so that the radiation source 10 is closer to an inspection channel, radiation inspection of a smaller inspected object 3 is facilitated, and the universality of a radiation inspection system for the volume of the inspected object 3 is improved.

In some embodiments, the radiation source device 1 further comprises a collimator 20, the collimator 20 is disposed on the first support 18, and the alignment accuracy of the radiation source 10 and the collimator 20 is configured to be ensured by the machining accuracy of the first support 18.

The collimator 20 has a strip-shaped slit allowing the radiation to pass through, which slit extends in the height direction z, and only radiation of the radiation beam opposite to the strip-shaped slit of the collimator 20 can be emitted outwards, so that the radiation beam passing through the collimator 20 forms a fan shape, which fan shape lies in a vertical plane and which projection in a horizontal plane is a straight line, which straight line extends in the first direction x. When the radiation source 10 is coplanar with the collimator 20, the beam with the strongest energy in the center of the radiation source 10 can be transmitted through the slit of the collimator 20, so as to obtain better imaging effect.

The embodiment ensures the coplanarity of the radiation source 10 and the collimator 20 through the processing precision of the first bracket 18, directly installs the radiation source 10 and the collimator 20 without adjusting the position, has simple structure and convenient use, and can ensure the coplanarity of the radiation source 10 and the collimator 20 even if different radiation sources 10 are replaced.

In some embodiments, as shown in fig. 3, the radiation source device 1 further comprises a collimator 20 and a shielding 19, the radiation source 10 being arranged spaced apart from the collimator 20 along the first direction x, the shielding 19 being arranged between the collimator 20 and the radiation source 10, the shielding 19 being configured to shield the radiation beam. The guard 19 may also be mounted to the first bracket 18. For example, the guard 19 may be a box-like structure or a plate-like structure, or the like.

This embodiment, by providing the shielding member 19, can prevent the radiation beam emitted from the radiation source 10 from radiating outwards in the process of reaching the collimator 20, and thus can play a protective role to protect the safety of an operator.

In some embodiments, the radiation source device 1 further comprises a first support 18, and the radiation source 10 is mounted on the first support 18 with an adjustable pitch angle.

In this embodiment, the radiation source 10 is rotatably mounted on the first bracket 18, and the rotation axis extends along the second direction y, so that the pitch angle of the radiation source 10 can be adjusted, and the mounting posture of the radiation source 10 can be adjusted. The installation mode can integrally change the position of the fan-shaped ray beam in the vertical plane, so that the ray beam can entirely cover the top and the top of the object 3, and the ray beam can be received by the detector 282 to perform radiographic inspection on the whole object 3.

The fan-shaped beam passing through the collimator 20 has an opening angle, and a part of the beam located in the vicinity of the angular bisector of the opening angle is called a main beam, so that the energy of the main beam in the radiation source 10 is highest, and therefore, a better imaging quality can be obtained in the radiation inspection, and the focus inspection can be performed on different areas of the object 3 by changing the pitch angle of the radiation source 10.

In some embodiments, as shown in fig. 5, the radiation source device 1 further comprises a collimator 20, the collimator 20 comprising:

A mounting plate 201, the mounting plate 201 being disposed on the first bracket 18, and

Two collimation plates 202 are disposed on the mounting plate 201, and a gap extending along the height direction z is formed between the two collimation plates 202, and the installation position of the two collimation plates along the second direction y relative to the vertical center plane of the ray bundle can be synchronously adjusted to adjust the width of the gap, and the second direction y is perpendicular to the first direction x, for example, the collimation plates 202 can be disposed on one side of the mounting plate 201 away from the ray source 10, so as to conveniently adjust the width.

According to the embodiment, on the basis of aligning the ray source 10 with the slit, when the slit is adjusted, the two collimating plates can be synchronously moved away from or close to each other, the centering of the ray source 10 and the slit can still be ensured in the process, the link of adjusting the centering is omitted, the operation is simple and convenient, and the performance of a ray inspection system can be ensured.

In some embodiments, a guide pin may be provided on the base 17, with an axis of the guide pin extending in the height direction z and passing through a target point of the radiation source 10, and the first bracket 18 is positioned by the guide pin and rotatable about the axis of the guide pin to adjust the rotation angle of the radiation source 10.

For example, the rotation angle has a positive and negative adjustment angle with respect to the central vertical plane, such as an adjustment range of ±5°.

By providing the first support 18, this embodiment allows the collimator 20 to be provided on the first support 18 and rotated synchronously with the radiation source 10 as the radiation source 10 rotates, thereby adjusting the angle of oscillation of the fan beam to adjust the accuracy of alignment with the detector assembly 28.

In some embodiments, as shown in fig. 6 and 7, the detecting device 2 further includes a second movable platform 25 movably disposed above the second fixed platform 21 along the first direction x, wherein the detecting component 28 is disposed on the second movable platform 25.

Wherein the bottom of the detecting assembly 28 is higher than the second fixed platform 21 so as not to interfere with the second fixed platform 21 during the movement of the detecting assembly 28 in the first direction x. The dimension of the second movable platform 25 along the first direction x is smaller than the dimension of the second fixed platform 21 along the first direction x, so as not to increase the occupied space of the detecting device 2 along the first direction x in the position adjustment process.

In this embodiment, by setting the second movable platform 25 to adjust the position of the detecting component 28 in the first direction x, the second distance L2 between the detecting component 28 and the radiation source 10 can be changed, in the actual detection process, the position of the detecting component 28 in the first direction x can be quickly and conveniently adjusted according to the detection requirement, so that the detecting component 28 can comprehensively receive the radiation beam in the height direction z, so as to comprehensively inspect each region in the object 3, obtain better imaging quality, and the closer the detecting component 28 is to the object 3, the higher the imaging quality is. Therefore, the detection device 2 can adapt to different detection working conditions and has stronger universality.

In some embodiments, the detection device 2 further comprises a second guiding mechanism coupled between the second stationary platform 21 and the second movable platform 25 and configured to provide guiding for movement of the second movable platform 25.

In this embodiment, by providing the second guiding mechanism between the second fixed platform 21 and the second movable platform 25, the second movable platform 25 can be prevented from shaking during the movement along the first direction x, so as to improve the position adjustment precision of the detection assembly 28, and even when the position of the detection assembly 28 is adjusted, the detection assembly 28 can be aligned with the radiation source 10, so that the imaging precision is ensured, and the radiation detection precision is improved.

In some embodiments, the second guide mechanism comprises:

At least two second guide rails 22 arranged at intervals along a second direction y, the second guide rails 22 extending along a first direction x, the second direction y being perpendicular to the first direction x, and

At least two second sliding members 24, which are engaged with at least two second guide rails 22 in a one-to-one correspondence, the second sliding members 24 being slidable along the second guide rails 22;

wherein the second movable platform 25 is connected to at least two second slides 24.

As shown in fig. 6, at least two second sliders 24 may be provided at intervals in the first direction x for the same second rail 22 to improve support stability.

The embodiment realizes the guiding of the second movable platform 25 through the cooperation of the second sliding piece 24 and the second guide rail 22, has simple structure, stable sliding and strong bearing capacity, can adapt to the detection assembly 28 with larger weight, realizes stable bearing effect, can adapt to the detection assembly 28 with different weight, and can stably bear even if the number of the detectors 282 is increased.

In some embodiments, the detection device 2 further comprises a second drive mechanism comprising:

a second power member 29 provided to the second fixed platform 21 and configured to provide a rotational driving force;

A second screw rod 23 extending in the first direction x and rotatably provided to the second fixed platform 21 about its own axis, one end of the second screw rod 23 being connected to the output end of the second power member 29, and

The second nut is screwed on the second screw rod 23, and the second nut is connected to the second movable platform 25.

The second power element 29 may be a motor or a motor, and may be disposed at an end of the second fixed platform 21 away from the object 3 along the first direction x. Both ends of the second screw rod 23 may be supported on the second fixed platform 21 through a mounting seat, and the second nut may be connected to the bottom of the second movable platform 25.

For example, the second guide rails 22 may be arranged two at intervals along the second direction y, and the second lead screw 23 is arranged between the two second guide rails 22 along the second direction y, and more preferably, is located at a middle position of the two second guide rails 22, so that not only can the two second guide rails 22 provide stable guidance in a region of the second movable platform 25 near two ends along the second direction y, but also the second movable platform 25 can be driven to move by a ball screw mechanism formed by the middle second lead screw 23 and the second nut, so that the second movable platform 25 is prevented from deflecting in the moving process, the position adjustment precision of the detection assembly 28 is improved, and the clamping stagnation is not easy to occur.

Alternatively, the second movable platform 25 may be moved by manually applying a driving force.

In this embodiment, the second power member 29 drives the ball screw mechanism to move, so as to adjust the position of the radiation source 10, and thus, the second distance L2 between the detection assembly 28 and the radiation source 10 can be automatically adjusted, so that the adjustment accuracy is high, and the operation is convenient. Moreover, the ball screw mechanism has the advantages of high transmission precision, good running stability, high transmission efficiency, strong load bearing capacity, high reliability, difficult occurrence of faults and the like.

In some embodiments, the detection device 2 further comprises:

a second support 26, the second support 26 being provided on the second movable platform 25 and configured to carry a detection assembly 28.

Because the height dimension of the detecting component 28 is larger, the detecting component 28 can be installed at a proper height by arranging the second bracket 26, and the detecting component 28 can be connected at a proper height position, so that the stability of installation and position adjustment is improved.

In some embodiments, the detection device 2 further comprises:

A connecting seat 27 provided on the second bracket 26, and

The second driving mechanism 50 is configured to drive the second bracket 26 to move along a second direction y, which is perpendicular to the first direction x.

Since the adjustment amount of the detecting assembly 28 along the second direction y is small, the second driving mechanism 50 may be an electric push rod or a linear motor, so as to simplify the structure of the second driving mechanism 50. Alternatively, a motor outputting rotational movement may be used in conjunction with the ball screw structure to drive the movement of the connection block 27 in the second direction y relative to the second bracket 26. The detecting component 28 is mounted on the second fixed platform 21 through the connecting seat 27, the second bracket 26 and the second movable platform 25 in sequence.

Alternatively, the connection holder 27 may be moved by manually applying a driving force.

According to the embodiment, on the basis that the detection assembly 28 can adjust the installation position along the first direction x, the detection assembly 28 can also adjust the installation position along the second direction y, because the second fixed platform 21 is directly installed on the ground, the positioning accuracy is low, the high-accuracy alignment of the detection assembly 28 and the radiation source 10 is difficult to ensure, the alignment coplanarity degree of the detection assembly 28 and the radiation source 10 can be automatically adjusted by adjusting the position of the detection assembly 28 along the second direction y, the projection of the radiation beam on the detection assembly 28 is in the width range of the detector 282, and the intensity of the radiation received by the detector 282 and the detection accuracy of a radiation inspection system are improved.

In some embodiments, the detection device 2 further comprises:

A connecting seat 27 provided on the second bracket 26, and

The third driving mechanism is arranged on the connecting seat 27, and is provided with an output shaft, the output shaft extends along the first direction x, the output shaft is connected with the middle area of the detection assembly 28 along the length direction of the output shaft, and the third driving mechanism is configured to drive the detection assembly 28 to rotate around the axis of the output shaft in a vertical plane so as to align the strip-shaped detection assembly 28 with the ray bundle.

For example, the connection seat 27 may be disposed on the second support 26 near one end of the detection assembly 28 along the first direction x, so as to reduce the length of the output shaft of the third driving mechanism as much as possible, so as to improve the connection strength with the detection assembly 28, make the connection between the detection assembly 28 and the connection seat 27 more stable, reduce the amount of shake during the position adjustment process, and improve the adjustment accuracy.

According to the embodiment, the detection assembly 28 is driven to rotate through the output shaft by the third driving mechanism, the installation posture of the detection assembly 28 is correspondingly changed, the included angle between the projection of the ray beam on the detection assembly 28 and the length direction of the detection assembly 28 is adjustable, and the included angle is zero to be in an ideal adjustment state, so that the detection assembly 28 and the ray beam are aligned fast and efficiently to ensure the accuracy of the position of the aligned detection assembly 28, and the intensity of rays received by the detection assembly 28 and the detection accuracy of a ray inspection system are improved. Moreover, the output shaft is connected to the middle area of the detecting component 28 along the length direction thereof, so that the free end of the detecting component 28 can be prevented from shaking due to longer rotation process, and the stability of angle adjustment is improved.

Optionally, the second driving mechanism 50 is used for adjusting the deviation between the projection of the ray beam on the detecting component 28 and the length direction of the detecting component 28 in the second direction y, the third driving mechanism is used for adjusting the included angle between the projection of the ray beam on the detecting component 28 and the length direction of the detecting component 28, and the detecting component and the ray beam can be aligned quickly and efficiently through combination adjustment, so that the accuracy of the aligned position of the detecting component 28 is ensured, and the intensity of rays received by the detecting component 28 and the detection accuracy of a ray inspection system are improved.

In some embodiments, as shown in fig. 6 and 7, the third drive mechanism includes:

A third power element 40, disposed on the connection base 27, configured to provide a rotational driving force;

and a speed reducer 41 connected to the output end of the third power element 40, the speed reducer 41 outputting rotational motion through an output shaft.

For example, the third power element 40 may be a motor or a motor, the speed reducer 41 may be a gear speed reducer, and an output shaft of the speed reducer 41 may be connected to a side of the detection assembly 28 away from the object 3, so that the connection seat 27 and the second support 26 are both located behind the detection assembly 28.

In this embodiment, the rotation speed of the third power element 40 can be reduced to a proper rotation speed by the third power element 40 and the speed reducer 41, so as to accurately adjust the angle of the detection assembly 28 in the vertical plane, reduce the included angle between the projection of the ray beam on the detection assembly 28 and the length direction of the detection assembly 28 as much as possible, and improve the detection precision of the ray inspection system.

In some embodiments, as shown in fig. 6, the detection assembly 28 includes:

mounting arm rest 281, and

The plurality of detectors 282 are detachably disposed on the mounting arm 281 along the height direction z.

In this embodiment, the detector 282 is configured to be detachable, and when the first distance L1 between the radiation source 10 and the object 3 is increased, the projection length of the radiation source 10 on the detector 282 in the height direction z is increased, so that the number of the detectors 282 can be increased in the height direction z to expand the receiving range of the receiving radiation beam. Therefore, in actual detection, if the first distance L1 is increased by moving the radiation source 10 backward, the number of detectors 282 is increased accordingly, and the detection range is increased, and the height of the object 6 to be detected is allowed to be increased, and if the first distance L1 is decreased by moving the radiation source 10 forward, the number of detectors 282 to be used is also decreased accordingly, and the image quality is improved. Therefore, the radiation inspection system can be provided with a proper number of detectors 282 according to actual detection requirements, and is convenient to replace and install so as to adapt to the requirements of different working conditions.

Optionally, the mounting arm rest 281 is designed according to the maximum height required in actual detection, the detectors 282 are also covered according to the maximum height, and if the number of the required detectors 282 is small in actual detection, only part of the detectors 282 is used for receiving the ray bundle, and the other detectors 282 are in a state of not receiving the ray bundle.

In some specific embodiments, as shown in fig. 1, the positions of the radiation source 10 and the detection component 28 can be adjusted along the first direction x, a certain adjustment range can be realized for the first distance L1 and the second distance L2, detection requirements of more working conditions can be adapted through combination adjustment, the adjustment requirements on the adjustment amount of a single object in the radiation source 10 or the detection component 28 can be reduced by matching the two, the detection requirements of a target can be more easily achieved, the adjustment difficulty can be reduced, the operation is rapid and convenient, the detection efficiency is improved, and no influence is caused on key detection indexes such as penetration and resolution.

The adjustment distance range of the radiation source 10 and the detection assembly 28 along the first direction x may be determined according to the actual field requirement, for example, in fig. 1, the adjustment range of the radiation source 10 along the first direction x is greater than the adjustment range of the detection assembly 28 along the first direction x, because the detection assembly 2 is usually further provided with a wall on a side far from the object 3, and a channel needs to be left between the detection assembly 28 and the wall for an operator to pass through.

The structure of carrying the radiation source 10 by the first fixed platform 11 and carrying the detection assembly 28 by the second fixed platform 21 has higher fixing precision, better stability and lower cost than the structure of carrying by a movable vehicle.

Specifically, as shown in fig. 1, the first movable platform 16 is mounted on the top of the first fixed platform 11 through a first guiding mechanism, the base 17 is disposed on the top of the first movable platform 16, the first support 18 is disposed on the top of the base 17, the radiation source 10 and the collimator 20 are mounted on the first support 18 at intervals along the first direction x, and the shielding member 19 is disposed between the radiation source 10 and the collimator 20. The first power piece 15 is used for driving the first lead screw 13 to rotate, and the first lead screw 13 enables the first nut matched with the first lead screw to move, so that the first movable platform 16 is driven to move along the first direction x, and the position of the radiation source 10 along the first direction x is adjusted.

As shown in fig. 2, the second movable platform 25 is mounted on the top of the second fixed platform 21 through a second guiding mechanism, the second bracket 26 is disposed on the top of the second movable platform 25, the connecting seat 27 is disposed on the top of the second bracket 26, the third power member 40 is disposed on the connecting seat 27 and configured to provide a rotational driving force, the speed reducer 41 is connected to an output end of the third power member 40, the speed reducer 41 outputs a rotational motion through an output shaft, and the output shaft is connected to a middle area of a rear side of the mounting arm 281 in the detecting assembly 28 along a length direction, and a plurality of detectors 282 are disposed on a side surface of the mounting arm 281 facing the detected object 3.

While the present disclosure has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (23)

1. A radiographic inspection system, comprising:

Radiation source arrangement (1) comprising a first stationary platform (11) and a radiation source (10), the first stationary platform (11) being configured to support the radiation source (10), the radiation source (10) being configured to emit a radiation beam, the mounting position and/or mounting posture of the radiation source (10) relative to the first stationary platform (11) being adjustable, and

A detection device (2) comprising a second stationary platform (21) and a detection assembly (28), the second stationary platform (21) being configured to support the detection assembly (28), the detection assembly (28) being configured to receive the radiation beam, the detection assembly (28) being adjustable in mounting position and/or mounting attitude relative to the second stationary platform (21);

wherein the detection assembly (28) and the ray source (10) are arranged oppositely along a first direction (x), and an inspection channel for the passage of an inspected object (3) is formed between the ray source device (1) and the detection device (2).

2. The radiation inspection system according to claim 1, characterized in that the radiation source device (1) further comprises:

A first movable platform (16) movably arranged above the first fixed platform (11) along a first direction (x);

wherein the radiation source (10) is arranged on the first movable platform (16).

3. The radiation inspection system according to claim 2, characterized in that the radiation source device (1) further comprises:

A first guiding mechanism connected between the first stationary platform (11) and the first movable platform (16) and configured to provide guiding for movement of the first movable platform (16).

4. A radiation inspection system according to claim 3 wherein said first guide mechanism comprises:

At least two first guide rails (12) arranged at intervals along a second direction (y), the first guide rails (12) extending along the first direction (x), the second direction (y) being perpendicular to the first direction (x), and

At least two first sliding pieces (14) which are matched with at least two first guide rails (12) in a one-to-one correspondence manner, wherein the first sliding pieces (14) can slide along the first guide rails (12);

wherein the first movable platform (16) is connected with at least two first sliding pieces (14).

5. The radiation inspection system according to claim 2, characterized in that the radiation source device (1) further comprises a first drive mechanism comprising:

a first power member (15) provided to the first stationary platform (11) and configured to provide a rotational driving force;

A first screw (13) extending in the first direction (x) and rotatably provided on the first fixed platform (11) about its own axis, one end of the first screw (13) being connected to the output end of the first power member (15), and

The first nut is screwed on the first lead screw (13), and the first nut is connected with the first movable platform (16).

6. The radiation inspection system according to claim 2, characterized in that the radiation source device (1) further comprises a base (17), the base (17) being arranged on the first movable platform (16), the radiation source (10) being mounted on the first movable platform (16) via the base (17).

7. The radiation examination system according to claim 6, characterized in that the radiation source device (1) further comprises a first support (18), the radiation source (10) being mounted to the base (17) by means of the first support (18).

8. The radiographic inspection system according to claim 7, characterized in that the first rack (18) comprises:

A carrier (181) configured to mount the radiation source (10), and

And a plurality of support legs (182) connected between the base (17) and the carrying portion (181).

9. The radiation inspection system according to claim 7, characterized in that the end of the base (17) adjacent to the inspection channel in the first direction (x) extends beyond the first movable platform (16), at least part of the first support (1) being located on the exceeding part of the base (17).

10. The radiation inspection system according to claim 7, characterized in that the radiation source device (1) further comprises a collimator (20), the collimator (20) being arranged to the first support (18), the alignment accuracy of the radiation source (10) and the collimator (20) being configured to be ensured by the machining accuracy of the first support (18).

11. The radiation inspection system according to claim 7, characterized in that a guide pin is provided on the base (17), the axis of which guide pin extends in the height direction (z) and passes through the target point of the radiation source (10), and the first support (18) is positioned by the guide pin and is rotatable about the axis of the guide pin to adjust the rotation angle of the radiation source (10).

12. The radiation inspection system according to claim 7, characterized in that the radiation source device (1) further comprises a collimator (20) and a shielding (19), the shielding (19) being provided between the collimator (20) and the radiation source (10), the shielding (19) being configured to shield the radiation beam.

13. The radiation inspection system according to claim 1, characterized in that the radiation source device (1) further comprises a first support (18), the radiation source (10) being mounted to the first support (18) with an adjustable pitch angle.

14. The radiation inspection system according to claim 1, characterized in that the radiation source device (1) further comprises a collimator (20), the collimator (20) comprising:

mounting plate (201)

The two collimating plates (202) are arranged on the mounting plate (201), a gap extending along the height direction (z) is formed between the two collimating plates (201), the mounting positions of the two collimating plates along the second direction (y) relative to the vertical central plane of the ray bundle can be synchronously adjusted, so that the width of the gap can be adjusted, and the second direction (y) is perpendicular to the first direction (x).

15. The radiation inspection system according to any one of claims 1-14, wherein the detection device (2) further comprises:

a second movable platform (25) movably arranged above the second fixed platform (21) along the first direction (x);

Wherein the detection assembly (28) is arranged on the second movable platform (25).

16. The radiation inspection system according to claim 15, characterized in that the detection device (2) further comprises:

and a second guiding mechanism connected between the second fixed platform (21) and the second movable platform (25) and configured to provide guiding for the movement of the second movable platform (25).

17. The radiographic inspection system of claim 16, wherein the second guide mechanism comprises:

at least two second guide rails (22) arranged at intervals along a second direction (y), the second guide rails (22) extending along the first direction (x), the second direction (y) being perpendicular to the first direction (x), and

At least two second sliding pieces (24) which are matched with at least two second guide rails (22) in a one-to-one correspondence manner, wherein the second sliding pieces (24) can slide along the second guide rails (22);

wherein the second movable platform (25) is connected with at least two second sliding pieces (24).

18. The radiation inspection system according to claim 15, characterized in that the detection device (2) further comprises a second drive mechanism comprising:

A second power member (29) provided to the second stationary platform (21) and configured to provide a rotational driving force;

A second screw (23) extending in the first direction (x) and rotatably provided on the second fixed platform (21) about its own axis, one end of the second screw (23) being connected to the output end of the second power member (29), and

And the second nut is screwed on the second lead screw (23) and is connected with the second movable platform (25).

19. The radiation inspection system according to claim 15, characterized in that the detection device (2) further comprises:

-a second support (26), said second support (26) being provided on said second mobile platform (25) and configured to carry said detection assembly (28).

20. The radiation inspection system according to claim 19, characterized in that the detection device (2) further comprises:

a connecting seat (27) arranged on the second bracket (26), and

-A second driving mechanism (50) configured to drive the movement of the connection seat (27) along a second direction (y), which is perpendicular to the first direction (x).

21. The radiation inspection system according to claim 19, characterized in that the detection device (2) further comprises:

a connecting seat (27) arranged on the second bracket (26), and

The third driving mechanism is arranged on the connecting seat (27), and is provided with an output shaft, the output shaft extends along the first direction (x), the output shaft is connected with the detecting component (28) along the middle area of the length direction of the output shaft, and the third driving mechanism is configured to drive the detecting component (28) to rotate around the axis of the output shaft in a vertical plane so as to align the strip-shaped detecting component (28) with the ray bundle.

22. The radiology examination system of claim 21, wherein the third drive mechanism comprises:

A third power element (40) provided to the connection base (27) and configured to provide a rotational driving force;

And the speed reducer (41) is connected to the output end of the third power piece (40), and the speed reducer (41) outputs rotary motion through the output shaft.

23. The radiation inspection system according to any one of claims 1-14, wherein the detection assembly (28) comprises:

mounting arm support (281); and

The detectors (282) are arranged on the mounting arm support (281) along the height direction (z) and are detachable.