High-energy X-ray multilayer nested shielding device

Abstract

The invention relates to a high-energy X-ray multilayer nested shielding device, belongs to the technical field of CT (Computed Tomography), and solves the problems that in the prior art, a high-energy ray test needs to be carried out in a shielding plant, the occupied space is large, and the test site is limited. The device comprises a fixed shielding tube, a movable shielding tube and a middle scanning tube, the number of the fixed shielding pipes is two, and the two fixed shielding pipes are respectively a first fixed shielding pipe and a second fixed shielding pipe. The two movable shielding pipes are symmetrically arranged and comprise the first movable shielding pipe and the second movable shielding pipe. The first movable shielding tube and the second movable shielding tube are respectively sleeved in the first fixed shielding tube and the second fixed shielding tube in a sliding manner; the middle scanning tube is sleeved with the movable shielding tube, and the two ends of the middle scanning tube are fixedly connected with the first fixed shielding tube and the second fixed shielding tube respectively. According to the invention, self-shielding of high-energy rays is realized.

Description

Technical Field

[0001] The invention relates to the field of CT technology, and in particular to a high-energy X-ray multi-layer nested shielding device. Background Art

[0002] Most existing CT scanning systems are fixed structures. When in use, the CT machine is fixed and the object to be tested is moved to perform a spiral scan. The rotational motion of the radiation source on the CT machine and the linear motion of the object to be tested are superimposed to achieve a spiral scan. Existing CT scanning systems occupy a large area and are inconvenient to use. In addition, most existing CT scanning systems are fixed structures, which are fixed as a whole and require the object to be tested to move linearly during scanning. CT scanning cannot be performed on fixed structures / objects, limiting practical applications.

[0003] Taking into account that the scanning of specific products / equipment parts requires keeping the product / component in place and scanning the measured part without being separated from the original equipment; or, when scanning specific parts, other sensitive components of the equipment need to avoid the influence of scanning rays, this puts higher requirements on the radiation shielding performance of high-energy CT scanning equipment.

[0004] Therefore, it is necessary to provide a high-energy X-ray shielding device to achieve CT scanning while keeping the product under test motionless, and to maintain good ray shielding performance during the process. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a high-energy X-ray multi-layer nested shielding device to solve the problem that the existing CT equipment requires the measured product to move relative to each other to achieve scanning and has poor ray shielding performance during scanning.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A high-energy X-ray multi-layer nested shielding device, comprising: a fixed shielding tube, a movable shielding tube and an intermediate scanning tube;

[0008] The fixed shielding tubes are provided with two, namely a first fixed shielding tube and a second fixed shielding tube;

[0009] The movable shielding tubes are symmetrically provided with two, including: a first movable shielding tube and a second movable shielding tube;

[0010] The first movable shielding tube and the second movable shielding tube are respectively slidably sleeved inside the first fixed shielding tube and the second fixed shielding tube;

[0011] The intermediate scanning tube is sleeved inside the movable shielding tube, and two ends of the intermediate scanning tube are fixedly connected to the first fixed shielding tube and the second fixed shielding tube respectively.

[0012] Furthermore, it also includes: a radiation shielding cover; the radiation shielding cover is arranged in the middle of the first movable shielding tube and the second movable shielding tube, the two sides of the radiation shielding cover are respectively fixedly connected to the first movable shielding tube and the second movable shielding tube, and the radiation shielding cover is slidably sleeved on the outside of the middle scanning tube.

[0013] Furthermore, it also includes: a lower shielding block and a scanning assembly, wherein the scanning assembly and the lower shielding block are respectively arranged on the upper and lower sides of the middle scanning tube, and are both fixedly connected to the ray shielding cover; the scanning assembly is used to emit rays to scan the workpiece to be measured.

[0014] Furthermore, the first fixed shielding tube and the second fixed shielding tube are fixedly connected to two sides of the device housing respectively; and the ends of the first fixed shielding tube and the second fixed shielding tube are both fixedly mounted with a first closed ring.

[0015] Furthermore, the inner diameter of the first closed ring is smaller than the inner diameters of the first fixed shielding tube and the second fixed shielding tube.

[0016] Furthermore, the first movable shielding tube is sleeved inside the first fixed shielding tube, and the second movable shielding tube is sleeved inside the second fixed shielding tube.

[0017] Further, outer diameters of the first movable shielding tube and the second movable shielding tube are smaller than inner diameters of the first fixed shielding tube and the second fixed shielding tube.

[0018] Furthermore, second closed rings are fixedly installed at the ends of the first movable shielding tube and the second movable shielding tube; and the outer diameter of the second closed ring is equal to the inner diameter of the fixed shielding tube.

[0019] Furthermore, a clamping mechanism is provided at the outer end of the first fixed shielding tube for clamping and fixing the object to be tested; a shielding end cover is fixedly installed at the outer end of the second fixed shielding tube, and the shielding end cover is used to close the port of the second fixed shielding tube.

[0020] A high-energy CT system comprises a high-energy X-ray multi-layer nested shielding device.

[0021] The technical solution of the present invention can achieve at least one of the following effects:

[0022] 1. The high-energy X-ray multi-layer nested shielding device of the present invention can achieve self-shielding of X-rays by arranging an intermediate scanning tube, a movable shielding tube and a fixed shielding tube which are installed in sequence from the inside to the outside; since the present invention can achieve self-shielding, compared with the existing solution of testing in a shielding plant or a shielding cabin, it reduces the space occupied by the equipment and saves the high site construction cost of the equipment.

[0023] 2. In the high-energy X-ray multi-layer nested shielding device of the present invention, the ray shielding cover is fixedly connected between the first movable shielding tube and the second movable shielding tube, and the scanning component performs scanning test on the object to be tested at the position of the ray shielding cover; since the movable shielding tube is sleeved inside the fixed shielding tube, the movable shielding tube can undergo relative rotational motion and relative linear displacement relative to the fixed shielding tube, thereby realizing spiral scanning of the object to be tested under the premise that the object to be tested is fixed, and self-shielding can be achieved through the multi-layer nested shielding device.

[0024] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0026] Figure 1 This is a schematic structural diagram of a high-energy X-ray multi-layer nested shielding device according to Example 1 of the present invention;

[0027] Figure 2 This is a front view of a high-energy X-ray multi-layer nested shielding device according to Example 1 of the present invention;

[0028] Figure 3 An exploded view of a high-energy X-ray multi-layer nested shielding device according to Example 1 of the present invention;

[0029] Figure 4 This is one of the schematic diagrams of the installation position of the high-energy X-ray multi-layer nested shielding device in the CT machine according to the first embodiment of the present invention;

[0030] Figure 5 This is a second schematic diagram of the installation position of the high-energy X-ray multi-layer nested shielding device in the CT machine according to the first embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the installation state of the high-energy X-ray multi-layer nested shielding device of Example 2 of the present invention in a high-energy CT system;

[0032] Figure 7 This is a schematic diagram of the coordination state of the movable shielding tube and the central shielding tube of the high-energy X-ray multi-layer nested shielding device according to Example 3 of the present invention;

[0033] Figure 8This is a schematic structural diagram of a driving claw ring of a high-energy X-ray multi-layer nested shielding device according to Example 3 of the present invention;

[0034] Fig. 9 A front view of a driving claw ring of a high-energy X-ray multi-layer nested shielding device according to Example 3 of the present invention;

[0035] Fig.10 This is a schematic structural diagram of a second positioning hoop of a high-energy X-ray multi-layer nested shielding device according to Example 4 of the present invention;

[0036] Fig.11 This is a front view of the second positioning hoop of the high-energy X-ray multi-layer nested shielding device of Example 4 of the present invention.

[0037] Reference numerals:

[0038] 1-first fixed shielding tube; 2-second fixed shielding tube; 3-first movable shielding tube; 4-second movable shielding tube; 5-ray shielding cover; 6-lower shielding block; 7-scanning assembly; 8-clamping mechanism; 9-object to be tested; 10-mounting plate; 11-first closed ring; 12-middle scanning tube; 13-shielding end cover; 14-equipment housing; 15-rotating mechanism; 16-sliding bottom plate; 17-guide ring; 18-arc-shaped guide plate; 19-first ball; 20-guide track groove; 21-second closed ring; 22-second ball. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0040] Example 1

[0041] A specific embodiment of the present invention discloses a high-energy X-ray multi-layer nested shielding device, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes: a fixed shielding tube, a movable shielding tube, and an intermediate scanning tube 12.

[0042] like Figure 8 As shown, two fixed shielding tubes are provided, namely a first fixed shielding tube 1 and a second fixed shielding tube 2 ; and the first fixed shielding tube 1 and the second fixed shielding tube 2 are fixedly connected to two sides of the equipment housing 14 , respectively.

[0043] Specifically, Figure 4As shown, a mounting plate 10 is fixedly installed on the outer side of the first fixed shielding tube 1 and the second fixed shielding tube 2; the first fixed shielding tube 1 or the second fixed shielding tube 2 passes through the left and right sides of the equipment housing 14, and is fixedly connected to the side of the equipment housing 14 through the mounting plate 10.

[0044] Furthermore, if Figure 1 , Figure 2 , Figure 3 As shown, the movable shielding tubes are symmetrically provided with two, including: a first movable shielding tube 3 and a second movable shielding tube 4.

[0045] Specifically, Figure 4 As shown, the first movable shielding tube 3 and the second movable shielding tube 4 are respectively slidably sleeved inside the first fixed shielding tube 1 and the second fixed shielding tube 2. In addition, a radiation shielding cover 5 is fixedly connected to the middle of the first movable shielding tube 3 and the second movable shielding tube 4, and the first movable shielding tube 3 and the second movable shielding tube 4 are symmetrically arranged on both sides of the radiation shielding cover 5.

[0046] Furthermore, the intermediate scanning tube 12 is sleeved inside the movable shielding tube, and two ends of the intermediate scanning tube 12 are fixedly connected to the first fixed shielding tube 1 and the second fixed shielding tube 2 respectively.

[0047] Furthermore, the first movable shielding tube 3 is sleeved inside the first fixed shielding tube 1, and the second movable shielding tube 4 is sleeved inside the second fixed shielding tube 2; and the outer diameters of the first movable shielding tube 3 and the second movable shielding tube 4 are smaller than the inner diameters of the first fixed shielding tube 1 and the second fixed shielding tube 2, such as Figure 4 shown.

[0048] During implementation, the object to be tested 9 is placed in the middle scanning tube 12, and the scanning assembly 7 is driven by the first movable shielding tube 3 and the second movable shielding tube 4 to rotate and move relative to the middle scanning tube 12, so as to scan the object to be tested 9 fixed inside the middle scanning tube 12. Figure 4 , Figure 5 shown.

[0049] In this embodiment, a multi-layer nested design of a multi-layer nested shielding device is realized by setting an intermediate scanning tube 12, a movable shielding tube and a fixed shielding tube, and then the rotation and displacement of the scanning component 7 can be realized through the relative rotation and relative sliding of the movable shielding tube inside the fixed shielding tube.

[0050] Furthermore, first closed rings 11 are fixedly mounted on the ends of the first fixed shielding tube 1 and the second fixed shielding tube 2 , and the inner diameter of the first closed ring 11 is smaller than the inner diameter of the first fixed shielding tube 1 and the second fixed shielding tube 2 .

[0051] Furthermore, a second closed ring 21 is fixedly installed at the end of the movable shielding tube; the outer diameter of the second closed ring 21 is larger than the outer diameters of the first movable shielding tube 3 and the second movable shielding tube 4; the outer diameter of the second closed ring 21 is equal to the inner diameter of the fixed shielding tube, and the inner diameter of the second closed ring 21 is equal to the outer diameter of the intermediate scanning tube 12.

[0052] In this embodiment, by fixing the first closed ring 11 protruding inwardly at the ends of the first fixed shielding tube 1 and the second fixed shielding tube 2, and installing the second closed ring 21 protruding outwardly at the ends of the first movable shielding tube 3 and the second movable shielding tube 4, the displacement stroke of the second closed ring 21 can be limited by the first closed ring 11, and the first closed ring 11 and the second closed ring 21 form a mutually interlocking structure, which can further ensure the shielding effect of the shielding device.

[0053] In a specific embodiment of the present invention, Fig. 9 As shown, the multi-layer nested shielding device further includes: a ray shielding cover 5 and a lower shielding stopper 6.

[0054] Furthermore, the radiation shielding cover 5 is disposed between the first movable shielding tube 3 and the second movable shielding tube 4 , and its two sides are fixedly connected to the first movable shielding tube 3 and the second movable shielding tube 4 respectively, and is slidably sleeved on the outside of the middle scanning tube 12 .

[0055] Specifically, the scanning assembly 7 and the lower shielding block 6 are respectively disposed on the upper and lower sides of the middle scanning tube 12 , and are both fixedly connected to the ray shielding cover 5 .

[0056] Furthermore, the scanning component 7 is used to emit rays to scan the workpiece to be measured.

[0057] Furthermore, the lower shielding block 6 is used to shield radiation; the radiation shielding cover 5 is arranged on the outside of the intermediate scanning tube 12, and the upper and lower sides are fixedly connected to the scanning assembly 7 and the lower shielding block 6, and the left and right sides are fixedly connected to the movable shielding tube.

[0058] Preferably, the lower shielding block 6 is made of radiation shielding material.

[0059] Preferably, the lower shielding stopper 6 is a semi-enclosed structure, and is slidably installed below the middle scanning tube 12 in a semi-enclosed state.

[0060] Preferably, the lower shielding block 6 can achieve a covering range of no less than 120° for the intermediate scanning tube 12 .

[0061] Preferably, the fixed shielding tube, the movable shielding tube, the lower shielding block 6, the radiation shielding cover 5, the shielding end cover 13 and the closed ring are all made of a material capable of shielding X-rays or a multi-layer composite material.

[0062] In this embodiment, the multi-layer nested shielding device composed of the lower shielding block 6, the movable shielding tube and the fixed shielding tube can form an enveloping shielding cover for the intermediate scanning tube 12, so that the scanning system can achieve self-shielding of the X-rays emitted by the scanning component 7 without the need for an external shielding cover. The use scenario of the scanning system of the present invention is also free from the limitation of the shielding room.

[0063] Furthermore, a clamping mechanism 8 is provided at the outer end of the first fixed shielding tube 1 for clamping and fixing the object to be tested 9. A shielding end cap 13 is fixedly installed at the outer end of the second fixed shielding tube 2 for closing the second fixed shielding tube 2.

[0064] In a specific embodiment of the present invention, Figure 6 , Figure 7 As shown, the clamping mechanism 8 includes two groups of gate mechanisms that are symmetrically arranged.

[0065] like Figure 6 , Figure 7 As shown, the gate mechanism includes: a gate plate and a linear push rod; specifically, a positioning groove is provided on the gate plate, and the positioning groove is used to clamp and fix the workpiece to be measured.

[0066] Furthermore, the linear push rod is used to push the gate plate to move linearly. When the linear push rods of the two groups of gate mechanisms drive the gate plates to move linearly, the two gate plates approach or move away from each other, and then the gate plates can clamp or release the workpiece to be measured.

[0067] Specifically, when the two gate plates of the two groups of gate mechanisms are away from each other, the clamping mechanism 8 is in an open state, and the object 9 to be tested can be placed into the interior of the middle scanning tube 12 .

[0068] In this embodiment, by arranging the first movable shielding tube 3 and the second movable shielding tube 4 to be slidably sleeved on the outside of the middle scanning tube 12, and at the same time respectively slidingly sleeved on the inside of the first fixed shielding tube 1 and the second fixed shielding tube 2, not only can the rays emitted by the scanning component 7 be shielded, but also because the first movable shielding tube 3 and the second movable shielding tube 4 can slide and rotate relative to the first fixed shielding tube 1 and the second fixed shielding tube 2, it is possible to achieve superimposed rotational motion and displacement motion of the scanning component 7 under the premise of self-shielding, thereby realizing the spiral scanning of the object 9 to be measured by the scanning component 7.

[0069] The high-energy X-ray multi-layer nested shielding device of the present invention can realize spiral motion while having good self-shielding performance, thereby achieving simultaneous improvement of shielding performance and mechanical performance.

[0070] Example 2

[0071] A specific embodiment of the present invention provides a high-energy CT system, including the high-energy X-ray multi-layer nested shielding device described in Example 1.

[0072] Furthermore, in order to realize the rotational movement of the scanning assembly 7 of the X-ray multi-layer nested shielding device of this embodiment, a rotation mechanism 15 is also provided in this embodiment; Figure 6 shown.

[0073] In a specific embodiment of the present invention, the rotating mechanism 15 includes: a rotating support frame and a rotating drive; the first movable shielding tube 3 and the second movable shielding tube 4 are both rotatably mounted on the rotating support frame and can rotate under the driving of the rotating drive.

[0074] Exemplarily, the rotary drive includes a rotary motor, a driving gear and a driven gear; wherein the output shaft of the rotary motor is fixedly connected to the driving gear, driving the driving gear to rotate; further, the driven gear meshes with the driving gear for transmission, and is fixedly connected to the movable shielding tube, thereby being able to drive the movable shielding tube and the scanning assembly 7 to rotate.

[0075] Furthermore, in order to realize spiral scanning of the object 9 by the scanning assembly 7 , in this embodiment, a sliding bottom plate 16 is fixedly installed at the bottom of the rotating mechanism 15 , and the sliding bottom plate 16 is slidably installed on the bottom plate of the device housing 14 .

[0076] Specifically, the sliding base plate 16 is driven to slide linearly by the linear drive mechanism to realize the synchronous displacement of the rotating mechanism 15 and the scanning component 7; in this embodiment, the scanning component 7 is driven to rotate by the rotating mechanism 15, and at the same time, the rotating mechanism 15 is driven to displace by the linear drive mechanism to realize the superposition of rotational motion and linear displacement, which can realize the spiral motion of the scanning component 7, and then the scanning component 7 can perform spiral CT scanning on the object 9 to be tested.

[0077] It is worth noting that: in this embodiment, the scanning component 7 uses the high-energy X-ray emitter and detector of the spiral CT of the prior art for scanning, which is a mature technology. In this embodiment, the detailed structure and implementation principle of the scanning component 7 are not described in detail.

[0078] During implementation, the present invention integrates the scanning component 7 on the rotating mechanism 15, which can realize 360° continuous rotation. By moving the shielding tube, the scanning component 7 is driven to rotate and displace relative to the object to be tested 9, so that the internal structure of the high-density workpiece can be spirally scanned, high-quality structural images can be generated, and information useful to the user can be extracted.

[0079] Example 3

[0080] A specific embodiment of the present invention is improved on the basis of embodiment 1 or embodiment 2:

[0081] In this embodiment, Figure 7 , Figure 8 , Fig. 9 As shown, guide rings 17 are fixedly installed at the ends of the first movable shielding tube 3 / second movable shielding tube 4, one end of the guide ring 17 is fixedly connected to the second closed ring 21 on the outside of the first movable shielding tube 3 / second movable shielding tube 4, and a plurality of arc-shaped guide plates 18 are circumferentially arranged on the other side, and a first ball 19 is nested and installed on the inner side of the arc-shaped guide plate 18.

[0082] Correspondingly, a guide track groove 20 is provided on the outer side of the middle scanning tube 12 , the first ball 19 can be inserted into the guide track groove 20 , and the first ball 19 can slide or roll along the guide track groove 20 .

[0083] Preferably, the guide track groove 20 is spiral-shaped.

[0084] Specifically, the cross section of the guide track groove 20 is an arc surface, and is spirally arranged along the outer circumferential surface of the middle scanning tube 12 .

[0085] When the first ball 19 slides or rolls along the guide track groove 20, the guide ring 17 can rotate circumferentially and displace in the axial direction relative to the intermediate scanning tube 12, thereby driving the first movable shielding tube 3, the second movable shielding tube 4 and the scanning assembly 7 to rotate and displace. In other words, when the first movable shielding tube 3 and the second movable shielding tube 4 rotate, the first ball 19 drives the guide ring 17 to displace under the guidance of the guide track groove 20, thereby realizing the spiral motion of the first movable shielding tube 3 and the second movable shielding tube 4 relative to the intermediate scanning tube 12.

[0086] Furthermore, the arc-shaped guide pieces 18 are provided in plurality, and correspondingly, the installation positions of the first balls 19 on the plurality of arc-shaped guide pieces 18 are different; specifically, the plurality of first balls 19 are staggered along the axial direction of the guide ring 17 and are equally spaced.

[0087] In a specific implementation of this embodiment, Figure 8 , Fig. 9 As shown, there are four arc-shaped guide plates 18, and the four arc-shaped guide plates 18 are arranged at intervals of 90°. Correspondingly, there are also four first balls 19, and the four first balls 19 are arranged at intervals of 90° in the circumferential direction. At the same time, the axial spacing between adjacent first balls 19 is 1 / 4 of the pitch of the guide track groove 20.

[0088] Specifically, in this embodiment, the rotating mechanism 15 is fixedly connected to the sliding bottom plate 16 , and is slidably mounted on the bottom of the device housing 14 through the sliding bottom plate 16 .

[0089] During implementation, rotating the guide ring 17 can screw multiple first balls 19 into the guide track groove 20 in turn, so that multiple first balls 19 can all cooperate with the guide track groove 20; then when the first movable shielding tube 3 / the second movable shielding tube 4 rotates under the drive of the rotating mechanism 15, the first ball 19 moves along the extension direction of the guide track groove 20, thereby realizing the axial displacement of the guide ring 17, and driving the first movable shielding tube 3 and the second movable shielding tube 4 to rotate and displace at the same time through the guide ring 17, and finally driving the scanning assembly 7 to spirally move relative to the equipment housing 14.

[0090] It is worth noting that: in the present embodiment, there is no need to set up a linear drive mechanism, and the rotational movement of the scanning component 7 can be realized only by sliding the rotating mechanism 15 installed on the device housing 14. At the same time, the first ball 19 can roll along the guide track groove 20 to synchronously realize displacement self-drive, and the spiral movement can be realized by only one rotating motor, thereby realizing the spiral scanning of the object to be tested 9 by the scanning component 7, and the shielding structure can be set up in multiple layers during the scanning process to achieve self-shielding of the rays without the aid of external shielding facilities.

[0091] The motion driving method of the scanning component 7 of this embodiment omits the linear driving mechanism, and only requires the sliding installation of the rotating mechanism 15 and the bottom plate of the equipment housing 14, so that only the rotating mechanism 15 is set, and the scanning component 7 is driven to rotate by a rotating motor while realizing its linear displacement, that is, this embodiment realizes the spiral driving of the scanning component 7, and then when the scanning component 7 emits high-energy rays to perform slice scanning on the object to be tested 9, it can synthesize a spiral CT scanning image of the workpiece to be tested.

[0092] Example 4

[0093] A specific embodiment of the present invention is improved on the basis of embodiment 1 or embodiment 2:

[0094] In this embodiment, Fig.10 , Fig.11As shown, a plurality of second balls 22 are disposed outside the second closed ring 21 ; the plurality of second balls 22 are evenly distributed along the circumferential direction of the second closed ring 21 , and are evenly spaced along the axial direction of the second closed ring 21 .

[0095] Correspondingly, a spiral track groove is processed on the inner surface of the first fixed shielding tube 1 and / or the second fixed shielding tube 2; the second closed ring 21 is fixedly connected to the first movable shielding tube 3 and / or the second movable shielding tube 4, and the second ball 22 can be embedded in the track groove.

[0096] In a specific implementation of this embodiment, Fig.10 , Fig.11 As shown, there are four second balls 22, and the four second balls 22 are arranged at intervals of 90 degrees; at the same time, the spacing between adjacent second balls 22 along the axial direction of the second closed ring 21 is 1 / 4 of the pitch of the spiral track groove. In other words, the four second balls 22 are embedded in the track groove at the same time, and when the first movable shielding tube 3 and the second movable shielding tube 4 rotate, the multiple second balls 22 roll synchronously along the spiral track groove on the inner wall surface of the first fixed shielding tube 1 or the second fixed shielding tube 2.

[0097] In this embodiment, there is no need to set up a linear drive mechanism. The rotational movement of the scanning component 7 can be achieved only by sliding the rotating mechanism 15 installed on the equipment housing 14. At the same time, the second ball 22 rolls along the track groove to synchronously realize displacement self-drive. The spiral movement can be achieved only by a rotating motor, thereby realizing the spiral scanning of the scanning component 7 on the object to be tested 9. In addition, during the scanning process, the shielding structure can be nested in multiple layers to achieve self-shielding of the rays without the aid of external shielding facilities. Therefore, the workpiece to be tested does not need to be moved to a machine room at a fixed location for testing, and the detection flexibility is improved, eliminating site restrictions.

[0098] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-energy X-ray multi-layer nested shielding device, characterized in that: include: A fixed shielding tube, a movable shielding tube and an intermediate scanning tube (12); The fixed shielding tubes are provided with two, namely a first fixed shielding tube (1) and a second fixed shielding tube (2); The movable shielding tubes are symmetrically provided with two of them, including: a first movable shielding tube (3) and a second movable shielding tube (4); The first movable shielding tube (3) and the second movable shielding tube (4) are respectively slidably sleeved inside the first fixed shielding tube (1) and the second fixed shielding tube (2); The intermediate scanning tube (12) is sleeved inside the movable shielding tube, and two ends of the intermediate scanning tube (12) are fixedly connected to the first fixed shielding tube (1) and the second fixed shielding tube (2) respectively.

2. The high-energy X-ray multi-layer nested shielding device according to claim 1, characterized in that: Also includes: A radiation shielding cover (5); the radiation shielding cover (5) is arranged between the first movable shielding tube (3) and the second movable shielding tube (4); two sides of the radiation shielding cover (5) are respectively fixedly connected to the first movable shielding tube (3) and the second movable shielding tube (4); and the radiation shielding cover (5) is slidably sleeved on the outside of the intermediate scanning tube (12).

3. The high-energy X-ray multi-layer nested shielding device according to claim 2, characterized in that: It also comprises: a lower shielding block (6) and a scanning assembly (7), wherein the scanning assembly (7) and the lower shielding block (6) are respectively arranged on the upper and lower sides of the intermediate scanning tube (12), and are both fixedly connected to the ray shielding cover (5); the scanning assembly (7) is used for emitting rays to scan the workpiece to be measured.

4. The high-energy X-ray multi-layer nested shielding device according to claim 3, characterized in that: The first fixed shielding tube (1) and the second fixed shielding tube (2) are respectively fixedly connected to two sides of the equipment housing (14); and first closed rings (11) are fixedly mounted on the ends of the first fixed shielding tube (1) and the second fixed shielding tube (2).

5. The high-energy X-ray multi-layer nested shielding device according to claim 4, characterized in that: The inner diameter of the first closed ring (11) is smaller than the inner diameters of the first fixed shielding tube (1) and the second fixed shielding tube (2).

6. The high-energy X-ray multi-layer nested shielding device according to claim 5, characterized in that: The first movable shielding tube (3) is sleeved inside the first fixed shielding tube (1), and the second movable shielding tube (4) is sleeved inside the second fixed shielding tube (2).

7. The high-energy X-ray multi-layer nested shielding device according to claim 6, characterized in that: The outer diameters of the first movable shielding tube (3) and the second movable shielding tube (4) are smaller than the inner diameters of the first fixed shielding tube (1) and the second fixed shielding tube (2).

8. The high-energy X-ray multi-layer nested shielding device according to claim 7, characterized in that: A second closed ring (21) is fixedly mounted on the ends of the first movable shielding tube (3) and the second movable shielding tube (4); the outer diameter of the second closed ring (21) is equal to the inner diameter of the fixed shielding tube.

9. The high-energy X-ray multi-layer nested shielding device according to claim 8, characterized in that: The outer end of the first fixed shielding tube (1) is provided with a clamping mechanism (8) for clamping and fixing the object to be tested (9); the outer end of the second fixed shielding tube (2) is fixedly installed with a shielding end cover (13), and the shielding end cover (13) is used to close the port of the second fixed shielding tube (2).

10. A high energy CT system, characterized in that: A high-energy X-ray multi-layer nested shielding device comprising the device described in any one of claims 1 to 9.

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