High-energy x-ray multilayer nested shielding device

Abstract

The present application relates to a kind of high-energy X-ray multilayer nested shielding device, belong to CT technical field, solve the problem that the high-energy ray test needs to be carried out in shielding plant in prior art, and the space occupied is large and test site is limited.The present application includes: fixed shielding tube, mobile shielding tube and intermediate scanning tube;The fixed shielding tube is provided with two, and is first fixed shielding tube and second fixed shielding tube respectively;The mobile shielding tube is symmetrically provided with two, including: first mobile shielding tube and second mobile shielding tube;First mobile shielding tube and second mobile shielding tube are respectively slidably connected in the inside of first fixed shielding tube and second fixed shielding tube;The intermediate scanning tube is sleeved in the inside of the mobile shielding tube, and two ends of the intermediate scanning tube are respectively connected with first fixed shielding tube and second fixed shielding tube fixedly.The present application realizes the self-shielding of high-energy ray.

Description

Technical Field

[0001] This invention relates to the field of CT technology, and more particularly to a high-energy X-ray multi-layer nested shielding device. Background Technology

[0002] Most existing CT scanning systems are fixed structures. During use, the CT scanner remains stationary while the object being tested is moved to perform a helical scan. The helical scan is achieved by superimposing the rotational motion of the X-ray source on the CT scanner with the linear motion of the object. However, existing CT scanning systems are bulky and inconvenient to use. Furthermore, their fixed structure, requiring linear movement of the object during scanning, makes them unsuitable for stationary structures / objects, thus limiting their practical applications.

[0003] Considering that scanning a specific product / equipment component requires keeping the product / component in a fixed position and ensuring that the part being scanned is not detached from the original equipment; or that other sensitive components of the equipment need to be protected from the influence of scanning radiation when scanning a specific component, higher requirements are placed on the radiation shielding performance of high-energy CT scanning equipment.

[0004] Therefore, there is a need to provide a high-energy X-ray shielding device that enables CT scanning while keeping the product under test stationary, and maintains good radiation shielding performance during the process. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a high-energy X-ray multi-layer nested shielding device to solve the problems of existing CT equipment requiring relative movement of the tested product to achieve scanning and poor X-ray shielding performance during the scanning process.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

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

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

[0009] Two movable shielding tubes are symmetrically provided, 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 both 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 shield; the radiation shield is disposed between the first movable shield and the second movable shield, the two sides of the radiation shield are fixedly connected to the first movable shield and the second movable shield respectively, and the radiation shield is slidably sleeved on the outside of the intermediate scanning tube.

[0013] Furthermore, it also includes: a lower shielding block and a scanning component, wherein the scanning component and the lower shielding block are respectively disposed on the upper and lower sides of the intermediate scanning tube, and both are fixedly connected to the radiation shield; the scanning component is used to emit radiation to scan the workpiece to be tested.

[0014] Furthermore, the first fixed shielding tube and the second fixed shielding tube are respectively fixedly connected to both sides of the equipment housing; and a first sealing ring is fixedly installed at the ends of both the first fixed shielding tube and the second fixed shielding tube.

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

[0018] Furthermore, a second sealing ring is fixedly installed at the end of the first and second movable shielding tubes; the outer diameter of the second sealing 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 cap is fixedly installed at the outer end of the second fixed shielding tube, and the shielding end cap is used to close the port of the second fixed shielding tube.

[0020] A high-energy CT system includes a multi-layered nested shielding device for high-energy X-rays.

[0021] The technical solution of this 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 setting an intermediate scanning tube, a movable shielding tube and a fixed shielding tube to be installed sequentially from the inside out. Since the present invention can achieve self-shielding, compared with the existing scheme of testing in a shielding factory or shielding chamber, it reduces the space occupied by the equipment and saves the high site construction costs of the equipment.

[0023] 2. The high-energy X-ray multi-layer nested shielding device of the present invention has a radiation shielding cover fixedly connected between a first movable shielding tube and a second movable shielding tube. The scanning component performs scanning tests on the test object at the position of the radiation shielding cover. Since the movable shielding tube is sleeved inside the fixed shielding tube, the movable shielding tube can rotate and linearly displace relative to the fixed shielding tube, thereby enabling spiral scanning of the test object while keeping it stationary. At the same time, self-shielding can be achieved through the multi-layer nested shielding device.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

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

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

[0028] Figure 3 This is an exploded view of the high-energy X-ray multi-layer nested shielding device of Embodiment 1 of the present invention;

[0029] Figure 4 This is one of the schematic diagrams showing the installation position of the high-energy X-ray multi-layer nested shielding device in a CT scanner according to Embodiment 1 of the present invention;

[0030] Figure 5 This is the second schematic diagram showing the installation position of the high-energy X-ray multi-layer nested shielding device in a CT scanner according to Embodiment 1 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 Embodiment 2 of the present invention in a high-energy CT system;

[0032] Figure 7 This is a schematic diagram of the cooperation state between the movable shielding tube and the central shielding tube of the high-energy X-ray multi-layer nested shielding device in Embodiment 3 of the present invention.

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

[0034] Figure 9 This is a front view of the drive claw ring of the high-energy X-ray multi-layer nested shielding device according to Embodiment 3 of the present invention;

[0035] Figure 10 This is a schematic diagram of the second positioning ring of the high-energy X-ray multi-layer nested shielding device in Embodiment 4 of the present invention;

[0036] Figure 11 This is a front view of the second positioning ring of the high-energy X-ray multi-layer nested shielding device according to Embodiment 4 of the present invention.

[0037] Figure label:

[0038] 1-First fixed shielding tube; 2-Second fixed shielding tube; 3-First movable shielding tube; 4-Second movable shielding tube; 5-Radiation shield; 6-Lower shielding block; 7-Scanning assembly; 8-Clamping mechanism; 9-Item to be tested; 10-Mounting plate; 11-First closed ring; 12-Intermediate scanning tube; 13-Shielding end cap; 14-Equipment housing; 15-Rotation mechanism; 16-Sliding base plate; 17-Guide ring; 18-Arc-shaped guide plate; 19-First ball bearing; 20-Guide track groove; 21-Second closed ring; 22-Second ball bearing. Detailed Implementation

[0039] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which 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 intended 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, there are two fixed shielding tubes, 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 respectively fixedly connected to both sides of the equipment housing 14.

[0043] Specifically, such as Figure 4As shown, mounting plates 10 are fixedly installed on the outer sides of both 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 penetrates 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 plates 10.

[0044] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, two movable shielding tubes are symmetrically arranged, including: a first movable shielding tube 3 and a second movable shielding tube 4.

[0045] Specifically, such as Figure 4 As shown, the first movable shielding tube 3 and the second movable shielding tube 4 are slidably sleeved inside the first fixed shielding tube 1 and the second fixed shielding tube 2, respectively. Furthermore, 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 the 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 As shown.

[0048] During implementation, the item to be tested 9 is placed in the intermediate scanning tube 12, and the scanning component 7 is rotated and displaced relative to the intermediate scanning tube 12 by the first moving shielding tube 3 and the second moving shielding tube 4, thereby scanning the item to be tested 9, which is fixed inside the intermediate scanning tube 12. Figure 4 , Figure 5 As shown.

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

[0050] Furthermore, a first sealing ring 11 is fixedly installed at the ends of both the first fixed shielding tube 1 and the second fixed shielding tube 2. The inner diameter of the first sealing 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 sealing ring 21 is fixedly installed at the end of the movable shielding tube; the outer diameter of the second sealing ring 21 is greater than the outer diameter of the first movable shielding tube 3 and the second movable shielding tube 4; the outer diameter of the second sealing ring 21 is equal to the inner diameter of the fixed shielding tube, and the inner diameter of the second sealing ring 21 is equal to the outer diameter of the intermediate scanning tube 12.

[0052] In this embodiment, by fixing a first closed ring 11 protruding inward to the end of the first fixed shielding tube 1 and the second fixed shielding tube 2, and installing a second closed ring 21 protruding outward to the end 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 restricted 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 one specific embodiment of the present invention, such as Figure 9 As shown, the multi-layer nested shielding device also includes: a radiation shielding cover 5 and a lower shielding block 6.

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

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

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

[0057] Furthermore, the lower shielding block 6 is used to shield the radiation; the radiation shielding cover 5 is installed outside the middle scanning tube 12, and its upper and lower sides are fixedly connected to the scanning component 7 and the lower shielding block 6, and its 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 block 6 has 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 shown can cover the intermediate scanning tube 12 with a coverage range of not less than 120°.

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

[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 a covering shielding cover for the intermediate scanning tube 12. Thus, 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 application scenarios of the scanning system of the present invention are also freed from the limitations of the shielded 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 test item 9. A shielding end cap 13 is fixedly installed at the outer end of the second fixed shielding tube 2 for sealing the second fixed shielding tube 2.

[0064] In one specific embodiment of the present invention, such as Figure 6 , Figure 7 As shown, the clamping mechanism 8 includes two sets of gate mechanisms arranged symmetrically.

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

[0066] Furthermore, the linear push rod is used to push the gate plate to move linearly. When the linear push rods of the two sets of gate mechanisms drive the gate plates to move linearly, the two gate plates move closer or further away from each other, thereby enabling the gate plates to clamp or release the workpiece to be tested.

[0067] Specifically, when the two gate plates of the two gate mechanisms are far apart, the clamping mechanism 8 is in the open state, and the item to be tested 9 can be placed into the interior of the intermediate scanning tube 12.

[0068] In this embodiment, by setting the first movable shielding tube 3 and the second movable shielding tube 4 to be slidably sleeved on the outside of the intermediate scanning tube 12, and simultaneously slidably sleeved on the inside of the first fixed shielding tube 1 and the second fixed shielding tube 2 respectively, not only can the rays emitted by the scanning component 7 be shielded, but also, since 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, the scanning component 7 can perform superimposed rotational and displacement movements under the premise of self-shielding, thereby realizing the spiral scanning of the object 9 by the scanning component 7.

[0069] The high-energy X-ray multi-layer nested shielding device of the present invention, while having good self-shielding performance, can simultaneously achieve spiral motion, thus realizing the synchronous improvement of shielding performance and mechanical performance.

[0070] Example 2

[0071] One 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 Embodiment 1.

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

[0073] In one 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 drive of the rotating drive.

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

[0075] Furthermore, in order to enable the scanning component 7 to perform spiral scanning of the test item 9, in this embodiment, a sliding base plate 16 is fixedly installed at the bottom of the rotating mechanism 15, and the sliding base plate 16 is slidably installed on the base plate of the device housing 14.

[0076] Specifically, the sliding base plate 16 is driven to slide linearly by the linear drive mechanism, thereby achieving 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 move by the linear drive mechanism, thereby achieving the superposition of rotational motion and linear displacement, which enables the spiral motion of the scanning component 7, and thus the scanning component 7 can perform spiral CT scanning on the object to be tested 9.

[0077] It is worth noting that in this embodiment, the scanning component 7 uses a high-energy X-ray emitter and detector from a conventional spiral CT scanner, which is a mature technology. The detailed structure and implementation principle of the scanning component 7 will not be elaborated upon in this embodiment.

[0078] In practice, the present invention integrates the scanning component 7 onto the rotating mechanism 15, which can achieve 360° continuous rotation. By moving the shielding tube, the scanning component 7 is driven to rotate and shift relative to the object to be tested 9, which can perform spiral scanning of the internal structure of high-density workpieces, generate high-quality structural images, and extract information useful to the user.

[0079] Example 3

[0080] One specific embodiment of the present invention is an improvement upon embodiment 1 or embodiment 2:

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

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

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

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

[0085] When the first ball bearing 19 slides or rolls along the guide rail groove 20, the guide ring 17 can rotate circumferentially and displace axially 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 bearing 19, guided by the guide rail groove 20, drives the guide ring 17 to displace, thereby enabling the first movable shielding tube 3 and the second movable shielding tube 4 to achieve helical motion relative to the intermediate scanning tube 12.

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

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

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

[0089] In practice, rotating the guide ring 17 can sequentially screw multiple first balls 19 into the guide rail groove 20, so that all the first balls 19 can cooperate with the guide rail groove 20; then, when the first movable shield tube 3 / second movable shield tube 4 rotates under the drive of the rotating mechanism 15, the first balls 19 move along the extension direction of the guide rail groove 20, thereby realizing the axial displacement of the guide ring 17, and through the guide ring 17, the first movable shield tube 3 and the second movable shield tube 4 rotate and move simultaneously, ultimately causing the scanning component 7 to undergo spiral motion relative to the device housing 14.

[0090] It is worth noting that in this embodiment, there is no need to set up a linear drive mechanism. The rotational movement of the scanning component 7 can be realized simply by the rotating mechanism 15 that is slidably mounted on the device housing 14. At the same time, the displacement self-drive can be realized synchronously by the rolling of the first ball 19 along the guide rail groove 20. The spiral movement can be realized by just one rotary motor, thereby enabling the scanning component 7 to perform spiral scanning of the object 9 to be tested. Furthermore, the scanning process can achieve self-shielding of the radiation by setting up a multi-layer nested shielding structure, without the need for external shielding facilities.

[0091] In this embodiment, the motion drive method of the scanning component 7 omits the linear drive mechanism. It only requires the rotating mechanism 15 to be slidably installed on the bottom plate of the device housing 14. This achieves linear displacement of the scanning component 7 by simply setting the rotating mechanism 15 and driving the scanning component 7 to rotate through a rotating motor. In other words, this embodiment realizes the helical drive of the scanning component 7. Thus, when the scanning component 7 emits high-energy rays to perform slice scanning of the test item 9, it can synthesize a helical CT scan image of the test workpiece.

[0092] Example 4

[0093] One specific embodiment of the present invention is an improvement upon embodiment 1 or embodiment 2:

[0094] In this embodiment, as Figure 10 , Figure 11As shown, a plurality of second balls 22 are arranged on the outside of 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 equally spaced along the axial direction of the second closed ring 21.

[0095] Correspondingly, a spiral track groove is machined 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 one specific implementation of this embodiment, such as Figure 10 , Figure 11 As shown, four second ball bearings 22 are provided, and the four second ball bearings 22 are arranged at 90° intervals; at the same time, the distance between adjacent second ball bearings 22 along the axial direction of the second closed ring 21 is 1 / 4 of the pitch of the spiral track groove. That is to say, the four second ball bearings 22 are simultaneously embedded in the track groove, and when the first movable shielding tube 3 and the second movable shielding tube 4 rotate, the multiple second ball bearings 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 realized simply by the rotating mechanism 15 that is slidably mounted on the device housing 14. At the same time, the displacement self-drive can be realized synchronously by the rolling of the second ball 22 along the track groove. The spiral movement can be realized by a single rotary motor, thereby enabling the scanning component 7 to perform spiral scanning of the object to be tested 9. During the scanning process, the X-rays can be self-shielded by setting up a multi-layer nested shielding structure, without the need for external shielding facilities. Therefore, the workpiece to be tested does not need to be moved to a fixed machine room for testing, which improves the flexibility of testing and eliminates site limitations.

[0098] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-energy X-ray multi-layer nested shielding device, characterized in that, include: Fixed shielding tube, movable shielding tube, radiation shield (5) and intermediate scanning tube (12); There are two fixed shielding tubes, namely a first fixed shielding tube (1) and a second fixed shielding tube (2); Two movable shielding tubes are symmetrically provided, 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 the 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. The radiation shield (5) is disposed between the first movable shield tube (3) and the second movable shield tube (4). The two sides of the radiation shield (5) are fixedly connected to the first movable shield tube (3) and the second movable shield tube (4) respectively, and the radiation shield (5) is slidably sleeved on the outside of the intermediate scanning tube (12).

2. The high-energy X-ray multi-layer nested shielding device according to claim 1, characterized in that, It also includes: a lower shielding block (6) and a scanning component (7), wherein the scanning component (7) and the lower shielding block (6) are respectively disposed on the upper and lower sides of the intermediate scanning tube (12) and are both fixedly connected to the radiation shield (5); the scanning component (7) is used to emit radiation to scan the workpiece to be tested.

3. The high-energy X-ray multi-layer nested shielding device according to claim 2, characterized in that, The first fixed shielding tube (1) and the second fixed shielding tube (2) are fixedly connected to both sides of the equipment housing (14); the ends of the first fixed shielding tube (1) and the second fixed shielding tube (2) are each fixedly installed with a first sealing ring (11).

4. The high-energy X-ray multi-layer nested shielding device according to claim 3, characterized in that, 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).

5. The high-energy X-ray multi-layer nested shielding device according to claim 4, 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).

6. The high-energy X-ray multi-layer nested shielding device according to claim 5, characterized in that, The outer diameter of the first movable shielding tube (3) and the second movable shielding tube (4) is smaller than the inner diameter of the first fixed shielding tube (1) and the second fixed shielding tube (2).

7. The high-energy X-ray multi-layer nested shielding device according to claim 6, characterized in that, A second sealing ring (21) is fixedly installed at the ends of the first movable shielding tube (3) and the second movable shielding tube (4); the outer diameter of the second sealing ring (21) is equal to the inner diameter of the fixed shielding tube.

8. The high-energy X-ray multi-layer nested shielding device according to claim 7, 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 test item (9); the outer end of the second fixed shielding tube (2) is fixedly installed with a shielding end cap (13), which is used to close the port of the second fixed shielding tube (2).

9. A high-energy CT system, characterized in that, Includes the high-energy X-ray multi-layer nested shielding device as described in any one of claims 1-8.

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