A mobile high-energy industrial spiral CT system

Abstract

The present application relates to a kind of mobile high-energy industrial spiral CT systems, belong to CT technical field, solve the problem that existing CT equipment is difficult to carry out the scanning of fixed workpiece.The CT system of the present application includes: scanning system and displacement system;Displacement system can drive scanning system displacement;Scanning system includes: scanning system shell, scanning assembly, drive assembly, workpiece support structure and feeding and discharging gate;Workpiece support structure is used to support and position the workpiece to be measured;Scanning assembly is used to emit ray and scan the workpiece to be measured;Drive assembly is used to drive scanning assembly to carry out rotary motion and linear motion relative to the workpiece to be measured;Feeding and discharging gate can be opened or closed, and then the workpiece to be measured can be placed inside workpiece support structure or taken out from workpiece support structure.The present application realizes the synchronous realization of the rotation and displacement of scanning assembly, can carry out real-time scanning to fixed piece, and overcome the limitation of CT machine use site.

Description

Technical Field

[0001] This invention relates to the field of CT technology, and more particularly to a mobile high-energy industrial spiral CT system. Background Technology

[0002] Most existing CT scanning systems are fixed structures; during use, the CT machine remains stationary while the object being tested is moved to perform the test, thus achieving a spiral scan; the rotational motion of the X-ray source on the CT machine and the linear motion of the object being tested are superimposed to achieve a spiral scan.

[0003] Existing CT scanning systems are bulky and inconvenient to use; moreover, most existing CT scanning systems are fixed structures that remain stationary, requiring the object being scanned to move linearly during scanning; CT scanning cannot be performed on stationary structures / objects, thus limiting practical applications.

[0004] Therefore, there is a need to provide a mobile high-energy industrial spiral CT system to realize automatic spiral scanning of the CT system and overcome the problem that scanning is difficult to achieve due to the fixed workpiece. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a mobile high-energy industrial spiral CT system to solve the problem of limited scanning of fixed workpieces by existing CT systems.

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

[0007] A mobile high-energy industrial spiral CT system includes: a scanning system and a displacement system;

[0008] The scanning system is mounted above the displacement system, and the displacement system is capable of moving the scanning system.

[0009] The scanning system includes: a scanning system housing, a scanning assembly, a drive assembly, a workpiece support structure, and loading / unloading gates;

[0010] The workpiece support structure is used to support and position the workpiece to be tested; the scanning assembly is used to emit rays and scan the workpiece to be tested; the driving assembly is used to drive the scanning assembly to perform rotational and linear motion relative to the workpiece to be tested.

[0011] The loading and unloading gate can be opened or closed, so that the workpiece to be tested can be placed inside the workpiece support structure or taken out from the workpiece support structure.

[0012] Furthermore, the drive assembly includes a rotary drive mechanism and a linear drive mechanism; the rotary drive mechanism is used to drive the scanning assembly to rotate; the linear drive mechanism is used to realize the overall displacement of the rotary drive mechanism.

[0013] Furthermore, the rotary drive mechanism includes: a first rotary motor, a motor gear, a support frame, and a drive gear fixed to the outside of the workpiece support structure; the scanning assembly is rotatably mounted on the support frame via the workpiece support structure and is fixedly connected to the drive gear; the first rotary motor is fixedly mounted on the support frame and can drive the motor gear to rotate; the drive gear meshes with the motor gear for transmission; when the drive gear rotates, the scanning assembly rotates synchronously.

[0014] Furthermore, the support frame is slidably mounted on the bottom of the scanning system housing.

[0015] Furthermore, the linear drive mechanism includes: a sliding positioning plate, a linear track, a base frame, a second rotary motor, a lead screw, and a support slider; the base frame is fixedly mounted on the base plate of the scanning system housing; the linear track is fixedly mounted on the base frame, and the sliding positioning plate slides in conjunction with the linear track; the second rotary motor is fixedly mounted on the base frame and can drive the lead screw to rotate, and when the lead screw rotates, it can drive the support slider to linear displacement.

[0016] Furthermore, both the support slider and the sliding positioning plate are fixedly installed at the bottom of the support frame.

[0017] Furthermore, the workpiece support structure includes: a positioning sleeve, a movable sleeve, and a workpiece positioning tube; two positioning sleeves are provided and are respectively fixedly connected to both sides of the scanning system housing; two movable sleeves are symmetrically provided and are respectively slidably sleeved inside the two positioning sleeves; the workpiece positioning tube is sleeved inside the movable sleeve, and both ends of the workpiece positioning tube are respectively fixedly connected to the two positioning sleeves.

[0018] Furthermore, the workpiece support structure also includes: a fixed cover and a shielding structure; the scanning assembly and the shielding structure are respectively disposed on the upper and lower sides of the workpiece positioning tube, the scanning assembly is used to emit rays to scan the workpiece to be tested; the shielding structure is a semi-enclosed structure used to shield the rays; the fixed cover is disposed outside the workpiece positioning tube, and its upper and lower sides are fixedly connected to the scanning assembly and the shielding structure, and its left and right sides are fixedly connected to the movable sleeve.

[0019] Furthermore, the loading and unloading gate includes two sets of gate mechanisms symmetrically arranged; the gate mechanism includes: a gate plate and a linear push rod; the gate plate is provided with a positioning groove, which is used to clamp and fix the workpiece to be tested; the linear push rod is used to push the gate plate to move linearly, so that the gate plate can clamp or release the workpiece to be tested.

[0020] A spiral CT scanning method for fixing workpieces, employing the aforementioned mobile high-energy industrial spiral CT system.

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

[0022] 1. The present invention provides a mobile high-energy industrial spiral CT system that can be used for defect detection of fixed high-density workpieces; the scanning system of the present invention is a movable and rotatable design, which addresses the problem that the workpiece cannot be disassembled for inspection. The scanning system is driven to rotate and displace relative to the workpiece through a rotation drive mechanism and a linear drive mechanism, so as to realize spiral CT scanning under the condition that the workpiece is fixed.

[0023] 2. The mobile high-energy industrial spiral CT system of the present invention has the scanning system mounted on the mobile system, which can then drive the scanning system to move, realizing flexible transfer of the scanning system's working scene. In addition, the scanning system is compact in size, solving the problem of high site construction costs and the problem of limited use due to the inability to move the equipment.

[0024] 3. The mobile high-energy industrial spiral CT system of the present invention can achieve X-ray self-shielding. When the scanning assembly performs X-ray scanning on the workpiece to be tested in the workpiece positioning tube, it can achieve X-ray self-shielding through the shielding structure, the moving sleeve and the positioning sleeve. While scanning and testing the target workpiece, it can avoid interference of X-rays to other components outside the workpiece.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the mobile high-energy industrial spiral CT system of the present invention;

[0028] Figure 2 A schematic diagram of the structure of the workpiece before it is placed into the mobile high-energy industrial spiral CT system;

[0029] Figure 3 A schematic diagram of the structure of the workpiece to be tested after it is placed into the mobile high-energy industrial spiral CT system;

[0030] Figure 4 A 3D cross-sectional view of the scanning system;

[0031] Figure 5 This is a front view of the cross-section of the scanning system;

[0032] Figure 6 This is a schematic diagram showing the open state of the loading and unloading gates;

[0033] Figure 7 This is a schematic diagram showing the closed state of the loading and unloading gates;

[0034] Figure 8 This is a schematic diagram of the structural components of the workpiece support structure;

[0035] Figure 9 This is a longitudinal sectional view of the workpiece support structure;

[0036] Figure 10 This is a schematic diagram showing the combined state of the scanning assembly and the workpiece support structure.

[0037] Figure 11 This is a schematic diagram of the structural components of the rotary drive mechanism;

[0038] Figure 12 This is a schematic diagram of the structural components of a linear drive mechanism;

[0039] Figure 13 This is a schematic diagram showing the combined state of the drive assembly and the workpiece support structure.

[0040] Figure 14 This is a schematic diagram showing the fit between the movable sleeve and the workpiece positioning tube in Example 2.

[0041] Figure 15 This is a schematic diagram of the structural composition of the rotating support in Example 2.

[0042] Figure label:

[0043] 1- Scanning system housing; 2- Workpiece support structure; 3- Loading / unloading gate; 4- Displacement system; 5- Workpiece to be measured; 6- Rotary drive mechanism; 7- Linear drive mechanism; 8- Scanning assembly;

[0044] 201-Positioning sleeve; 202-Modible sleeve; 203-First limiting ring; 204-Fixed cover; 205-Shielding structure; 206-Workpiece positioning tube; 207-Power supply assembly; 208-Drive gear; 209-Rotary slip ring; 210-Helical slide; 211-Rotary bracket; 212-Support rod; 213-Ball bearing;

[0045] 301 - Linear push rod; 302 - Gate plate;

[0046] 601-Support frame; 602-Mounting ring; 603-Motor gear; 604-First rotary motor;

[0047] 701-Sliding positioning plate; 702-Linear track; 703-Base plate frame; 704-Second rotary motor; 705-Lead screw; 706-Support slider; 707-Positioning block. Detailed Implementation

[0048] 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.

[0049] Example 1

[0050] A specific embodiment of the present invention discloses a mobile high-energy industrial spiral CT system, such as... Figure 1 , Figure 2 , Figure 3 As shown, it includes: a scanning system and a displacement system;

[0051] The scanning system is mounted above the displacement system 4, and the displacement system 4 is capable of moving the scanning system.

[0052] The scanning system includes: a scanning system housing 1, a scanning assembly 8, a drive assembly, a workpiece support structure 2, and a loading / unloading gate 3;

[0053] The workpiece support structure 2 is used to support and position the workpiece to be tested; the scanning assembly 8 is used to emit rays and scan the workpiece to be tested; the driving assembly is used to drive the scanning assembly 8 to perform rotational and linear motion relative to the workpiece to be tested;

[0054] The loading and unloading gate 3 can be opened or closed, so that the workpiece to be tested can be placed inside the workpiece support structure 2 or taken out from the workpiece support structure 2.

[0055] Furthermore, the displacement system 4 can be a trailer assembly or other displacement drive mechanism.

[0056] In this embodiment, the trailer assembly can be an existing robotic trailer, as long as it meets the carrying requirements of the scanning system in this embodiment.

[0057] Alternatively, in this embodiment, the displacement driving mechanism includes a three-degree-of-freedom displacement driving mechanism composed of an X-axis displacement driving mechanism, a Y-axis displacement driving mechanism, and a Z-axis displacement driving mechanism. In practice, the X-axis displacement driving mechanism, the Y-axis displacement driving mechanism, and the Z-axis displacement driving mechanism are connected in series to form a three-degree-of-freedom displacement driving mechanism, and then the scanning system is fixedly installed on the end motion platform.

[0058] Furthermore, when the workpiece 5 to be tested is a horizontally installed workpiece, when the scanning system is installed on the displacement system 4, the scanning assembly 8 is in a vertical state and the workpiece support structure 2 is in a horizontal state. Then, by driving the horizontal displacement of the scanning system through the displacement system 4, the workpiece 5 to be tested (relatively moving) can be extended into the interior of the workpiece support structure 2, and then the workpiece 5 to be tested can be scanned by the scanning assembly 8.

[0059] Similarly, when the workpiece 5 to be tested is a vertically installed workpiece, when the scanning system and the displacement system 4 are installed and fixed, the scanning assembly 8 is in a horizontal state and the workpiece support structure 2 is in a vertical state. Then, the workpiece support structure 2 is driven to move horizontally by the displacement system 4 until it is aligned with the workpiece 5 to be tested. After that, the scanning system and the workpiece support structure are moved up and down as a whole by the displacement system 4 to cover the workpiece 5 to be tested inside the workpiece support structure 2.

[0060] In one specific embodiment of the present invention, such as Figure 4 , Figure 5 As shown, the drive assembly includes a rotary drive mechanism 6 and a linear drive mechanism 7; the rotary drive mechanism 6 is used to drive the scanning assembly 8 to rotate; the linear drive mechanism 7 is used to realize the overall displacement of the rotary drive mechanism 6.

[0061] In one specific embodiment of the present invention, the rotary drive mechanism 6 includes: a first rotary motor 604, a motor gear 603, and a support frame 601.

[0062] Specifically, such as Figure 10 As shown, the scanning assembly 8 is rotatably mounted on the support frame 601 via the workpiece support structure 2 and is fixedly connected to the drive gear 208.

[0063] Furthermore, the drive gear 208 is fixedly connected to the movable sleeve 202 of the workpiece support structure 2.

[0064] Furthermore, the first rotary motor 604 is fixedly mounted on the support frame 601, and its output shaft is fixedly connected to the motor gear 603, which can drive the motor gear 603 to rotate.

[0065] Furthermore, the drive gear 208 meshes with the motor gear 603 for transmission; when the drive gear 208 rotates, the scanning assembly 8 rotates synchronously.

[0066] In other words, when the first rotary motor 604 drives the drive gear 2008 to rotate through the motor gear 603, the movable sleeve 202 and the drive gear 208 rotate synchronously, thereby realizing the rotation drive of the scanning assembly 8.

[0067] Furthermore, a mounting ring 602 is provided in the middle of the support frame 601, such as... Figure 11 As shown.

[0068] Specifically, the drive gear 208 is rotatably mounted in the mounting ring 602 via a slip ring.

[0069] Furthermore, such as Figure 11 As shown, the motor gear 603 is rotatably mounted on the side of the support frame 601 and is driven to rotate by the first rotary motor 604.

[0070] Specifically, the support frame 601 is slidably mounted on the bottom of the scanning system housing 1, such as... Figure 4 , Figure 5 As shown.

[0071] In one specific embodiment of the present invention, such as Figure 12 As shown, the linear drive mechanism 7 includes: a sliding positioning plate 701, a linear track 702, a base frame 703, a second rotary motor 704, a lead screw 705, and a support slider 706.

[0072] Specifically, the base plate frame 703 is fixedly mounted on the base plate of the scanning system housing 1.

[0073] Specifically, such as Figure 12 As shown, the linear track 702 is fixedly mounted on the base frame 703, and the sliding positioning plate 701 is slidably engaged with the linear track 702.

[0074] Furthermore, such as Figure 13 As shown, the bottom of the support frame 601 is fixedly connected to the sliding positioning plate 701.

[0075] Specifically, the support slider 706 is fixedly connected to the bottom of the support frame 601; as shown Figure 13 As shown.

[0076] like Figure 12 As shown, the second rotary motor 704 is fixedly mounted on the base frame 703 and can drive the lead screw 705 to rotate. When the lead screw 705 rotates, it can drive the support slider 706 to move linearly. Specifically, the lead screw 705 and the support slider 706 are connected by threads. That is to say, the support frame 601, the sliding positioning plate 701, and the linear track 702 together limit the movement of the support slider 706 to linear displacement. The lead screw 705 and the support slider 706 form a lead screw and nut pair. When the second rotary motor 704 drives the lead screw 705 to rotate, the support slider 706 can drive the support frame 601 and the sliding positioning plate 701 to slide relative to the linear track 702.

[0077] Furthermore, both the support slider 706 and the sliding positioning plate 701 are fixedly installed at the bottom of the support frame 601.

[0078] In one specific embodiment of the present invention, such as Figure 8 , Figure 9 As shown, the workpiece support structure 2 includes: a positioning sleeve 201, a movable sleeve 202, and a workpiece positioning tube 206.

[0079] like Figure 8 As shown, there are two positioning sleeves 201, which are fixedly connected to both sides of the scanning system housing 1 respectively.

[0080] Furthermore, two movable sleeves 202 are symmetrically provided, and are respectively slidably sleeved inside the two positioning sleeves 201.

[0081] Furthermore, the workpiece positioning tube 206 is sleeved inside the movable sleeve 202, and both ends of the workpiece positioning tube 206 are fixedly connected to the two positioning sleeves 201 respectively.

[0082] Furthermore, a first limiting ring 203 is fixedly installed at the end of the positioning sleeve 201. The inner diameter of the first limiting ring 203 is smaller than the inner diameter of the positioning sleeve 201 and it is sleeved on the outside of the movable sleeve 202. Furthermore, a second limiting ring is fixedly installed at the end of the movable sleeve 202; the outer diameter of the second limiting ring is equal to the inner diameter of the positioning sleeve 201, and the inner diameter of the second limiting ring is equal to the outer diameter of the workpiece positioning tube 206.

[0083] In this embodiment, by fixing a first limiting ring 203 protruding inward to the end of the positioning sleeve 201 and installing a second limiting ring protruding outward to the end of the movable sleeve 202, the displacement stroke of the second limiting ring can be limited by the first limiting ring 203, and the first limiting ring 203 and the second limiting ring form a mutually interlocking structure, which can further ensure the shielding effect of the workpiece support structure 2.

[0084] In this embodiment, by setting up the workpiece positioning tube 206, the movable sleeve 202 and the positioning sleeve 201, a multi-layer nested design of the workpiece support structure 2 is realized. Then, through the relative rotation and relative sliding of the movable sleeve 202 inside the positioning sleeve 201, the rotation and displacement of the scanning assembly 8 can be realized.

[0085] Preferably, the positioning sleeve 201, the movable sleeve 202, the first limiting ring 203, and the second limiting ring are all made of materials capable of shielding X-rays or multi-layer composite materials.

[0086] In one specific embodiment of the present invention, such as Figure 9As shown, the workpiece support structure 2 further includes: a fixing cover 204 and a shielding structure 205.

[0087] Furthermore, the fixed cover 204 is disposed between the two movable sleeves 202, is fixedly connected to the movable sleeves 202, and is slidably sleeved on the outside of the workpiece positioning tube 206.

[0088] Specifically, the scanning assembly 8 and the shielding structure 205 are respectively disposed on the upper and lower sides of the workpiece positioning tube 206, and are both fixedly connected to the fixed cover 204. The fixed cover 204 is fixedly connected to the flange at the end of the movable sleeve 202.

[0089] Furthermore, the scanning assembly 8 is used to emit rays to scan the workpiece under test.

[0090] Furthermore, the shielding structure 205 is used to shield radiation; the fixed cover 204 is installed outside the workpiece positioning tube 206, and its upper and lower sides are fixedly connected to the scanning assembly 8 and the shielding structure 205, and its left and right sides are fixedly connected to the movable sleeve 202.

[0091] Preferably, the shielding structure 205 is made of radiation shielding material.

[0092] Preferably, the shielding structure 205 is a semi-enclosed structure, which is slidably installed below the workpiece positioning tube 206 in a semi-enclosed state; thus, the workpiece support structure 2 composed of the shielding structure 205, the movable sleeve 202 and the positioning sleeve 201 can form a covering shielding tube for the workpiece positioning tube 206, thereby enabling the scanning system to achieve self-shielding of the X-rays emitted by the scanning assembly 8 without the need for an external shielding cover, and the application scenarios of the scanning system of the present invention are also freed from the limitations of the shielded machine room.

[0093] In this embodiment, by symmetrically arranging two movable sleeves 202 slidably fitted onto the outside of the workpiece positioning tube 206, and simultaneously slidably fitted onto the inside of two positioning sleeves 201, not only can the rays emitted by the scanning assembly 8 be shielded, but also, because the movable sleeves 202 and the positioning sleeves 201 can slide and rotate relative to each other, superimposed rotational and displacement movements of the scanning assembly 8 can be achieved under the premise of self-shielding, realizing the spiral scanning of the workpiece 5 to be tested by the scanning assembly 8. The workpiece support structure 2 of the present invention, while having good self-shielding performance, can simultaneously realize spiral movement, achieving a simultaneous improvement in shielding performance and mechanical performance.

[0094] In one specific embodiment of the present invention, such as Figure 6 , Figure 7 As shown, the loading and unloading gate 3 includes two sets of gate mechanisms arranged symmetrically.

[0095] like Figure 6 , Figure 7 As shown, the gate mechanism includes a gate plate 302 and a linear push rod 301; specifically, the gate plate 302 is provided with a positioning groove, which is used to clamp and fix the workpiece to be tested.

[0096] Furthermore, the linear push rod 301 is used to push the gate plate 302 to move linearly. When the linear push rods 301 of the two sets of gate mechanisms drive the gate plate 302 to move linearly, the two gate plates 302 move closer or further away from each other, so that the gate plate 302 can clamp or release the workpiece to be tested.

[0097] During implementation:

[0098] This invention rotates a scanning assembly consisting of a high-energy X-ray emitter and a detector onto a rotary drive mechanism 6, enabling 360° continuous rotation. This allows for spiral scanning of the internal structure of high-density workpieces, generating high-quality structural images and extracting information useful to the user.

[0099] The portable high-energy industrial spiral CT scanning system of the present invention realizes the mobility of the high-energy spiral CT detection system, including the mobility of its overall position and the mobility of the internal scanning assembly 8 relative to the workpiece to be tested. By setting up a dual movement mechanism, the spiral CT scanning system of the present invention can not only complete the scanning function of conventional high-energy detection equipment, but also eliminate its limitations on the state of the workpiece to be tested and the site.

[0100] The spiral CT scanning system of the present invention can perform CT scans on workpieces that cannot be disassembled or moved, without the need to build a large infrastructure, saving high infrastructure costs and fixed land use, and can be flexibly applied without being limited by the site.

[0101] The portable high-energy CT detection system of the present invention, by setting up a multi-layer nested shielding structure composed of a workpiece positioning tube 206, a movable sleeve 202 and a positioning sleeve 201, can shield the high-energy rays emitted by the scanning assembly 8, effectively preventing ray leakage. Moreover, the scanning system can perform high-energy scanning of the workpiece 5 to be tested without being in a shielded room, overcoming the limitation of existing high-energy scanning equipment that can only be scanned in a shielded room, and greatly expanding the application flexibility of the CT scanning system.

[0102] Example 2

[0103] A specific embodiment of the present invention is an improvement upon embodiment 1:

[0104] In this embodiment, as Figure 14 , Figure 15As shown, a rotating bracket 211 is fixedly installed at the end of the movable sleeve 202. One end of the rotating bracket 211 is fixedly connected to the second limiting ring on the outer side of the movable sleeve 202, and multiple support rods 212 are arranged circumferentially on the other side. Ball bearings 213 are nested inside the support rods 212.

[0105] Correspondingly, a spiral slide 210 is provided on the outside of the workpiece positioning tube 206. The ball bearing 213 can be inserted into the spiral slide 210, and the ball bearing 213 can slide or roll along the spiral slide 210. When the ball bearing 213 slides or rolls along the spiral slide 210, the rotating bracket 211 can rotate circumferentially and move axially relative to the workpiece positioning tube 206, thereby driving the movable sleeve 202 and the scanning assembly 8 to rotate and move.

[0106] Furthermore, multiple support rods 212 are provided, and correspondingly, the installation positions of the ball bearings 213 on the multiple support rods 212 are different; specifically, the multiple ball bearings 213 are staggered along the axial direction of the rotating bracket 211.

[0107] In one specific implementation of this embodiment, such as Figure 15 As shown, there are four support rods 212, which are arranged at 90° intervals. Correspondingly, there are also four balls 213, which are arranged at 90° intervals in the circumferential direction. The axial distance between adjacent balls 213 is 1 / 4 of the pitch of the spiral slide 210.

[0108] Specifically, in this embodiment, the support frame 601 is fixedly connected to the sliding positioning plate 701, and is slidably installed on the base frame 703 through the sliding engagement of the sliding positioning plate 701 and the linear track 702.

[0109] In practice, rotating the rotating bracket 211 can sequentially screw multiple balls 213 into the spiral slide 210, so that multiple balls 213 can cooperate with the spiral slide 210; then, when the movable sleeve 202 rotates under the drive of the rotating drive mechanism 6, the balls 213 move along the extension direction of the spiral slide 210, thereby realizing the axial displacement of the rotating bracket 211, and finally driving the scanning assembly 8 and the support frame 601 to slide relative to the base plate frame 703.

[0110] It is worth noting that in this embodiment, there is no need to set up a second rotary motor 704, a lead screw 705 to support the slider 706 and a positioning block 707.

[0111] In this embodiment, the motion drive method of the scanning assembly 8 omits the linear drive mechanism. It only requires the support frame 601 to be slidably installed on the bottom plate of the scanning system housing 1. This achieves linear displacement of the scanning assembly 8 by simply setting the rotary drive mechanism 6 and driving the rotation of the scanning assembly 8 through a first rotary motor 604. In other words, this embodiment realizes the helical drive of the scanning assembly 8. When the scanning assembly 8 emits high-energy rays to perform slice scanning of the workpiece 5 under test, it can synthesize a helical CT scan image of the workpiece under test.

[0112] Example 3

[0113] A spiral CT scanning method for fixing a workpiece, using the mobile high-energy industrial spiral CT system described in Example 1 or Example 2 for scanning;

[0114] The spiral CT scanning method includes the following steps:

[0115] Step S1: Adjust the scanning system to align with the workpiece to be measured by moving the system;

[0116] Step S2: Open the loading and unloading gate 3 of the scanning system, and continue to drive the scanning system to move until the workpiece to be tested extends into the workpiece positioning tube 206.

[0117] Step S3: Close the loading and unloading gate 3, start the scanning assembly 8 and drive the scanning assembly 8 to rotate stably through the rotary drive mechanism 6; start the linear drive mechanism 7 to drive the rotary drive mechanism 6, the movable sleeve 202 and the scanning assembly 8 to move linearly, and the scanning assembly 8 continues to rotate during the linear displacement.

[0118] Step S4: The scanning assembly 8 emits X-rays to achieve a spiral CT scan of the workpiece 5 to be tested.

[0119] Specifically, in step S1, the principle for aligning the scanning system with the workpiece 5 to be tested is that the workpiece 5 to be tested and the opening of the workpiece positioning tube 206 are on the same straight line. It is worth noting that in this invention, it is not required that the axis of the workpiece 5 to be tested and the workpiece positioning tube 206 be aligned. The linear displacement of the scanning system is sufficient to enclose the workpiece 5 to be tested in the workpiece positioning tube 206.

[0120] Furthermore, in step S2, when the loading and unloading gate 3 is opened, both gate plates 302 move to the position furthest from the axis of the workpiece positioning tube 206 under the drive of the linear push rod 301.

[0121] Further, in step S3, the closing method of the loading and unloading gate 3 is as follows: First, the linear push rod 301 of the first group of gate mechanisms drives its corresponding gate plate 302 to move towards the workpiece 5 to be tested until the gate plate 302 contacts one side of the workpiece 5 to be tested; then, the linear push rod 301 of the second group of gate mechanisms drives its corresponding gate plate 302 to move to contact the other side of the workpiece 5 to be tested.

[0122] Furthermore, in step S3, the scanning assembly 8 rotates in the following manner:

[0123] Step S301: The first rotary motor 604 drives the motor gear 603 to rotate;

[0124] Step S302: The motor gear 603 meshes with the drive gear 208 and rotates;

[0125] Step S303: The drive gear 208 is fixedly connected to the scanning assembly 8. When the drive gear 208 rotates, the scanning assembly 8 rotates synchronously. At the same time, since the workpiece 5 to be tested is fixed relative to the scanning system housing 1, the scanning assembly 8 rotates circumferentially relative to the workpiece 5 to be tested.

[0126] Furthermore, in step S3, there are two methods for scanning the linear displacement of the assembly 8:

[0127] The first method is the linear displacement of the scanning assembly 8:

[0128] Step S311: The second rotary motor 704 drives the lead screw 705 to rotate;

[0129] Step S312: The support slider 706 is fixedly connected to the support frame 601, and the support frame 601 is slidably mounted on the base plate frame 703; when the lead screw 705 rotates, it drives the support slider 706 and the support frame 601 to linear displacement.

[0130] Step S313: The scanning assembly 8 is rotatably mounted on the support frame 601 via the movable sleeve 202; when the support frame 601 moves linearly, the scanning assembly 8 moves linearly.

[0131] The second method, another linear displacement method for the scanning assembly 8, is as follows:

[0132] Step S321: Slide the support frame 601 onto the base plate of the scanning system housing 1;

[0133] Step S322: The ball bearing 213 on the rotating bracket 211 at the end of the movable sleeve 202 engages with the spiral slide 210 on the surface of the workpiece positioning tube 206; when the movable sleeve 202 rotates relative to the workpiece positioning tube 206 under the drive of the rotating drive mechanism 6, the rotating bracket 211 rotates around the workpiece positioning tube 206.

[0134] Step S223: When the rotating bracket 211 rotates around the workpiece positioning tube 206, the ball 213 rolls along the spiral slide 210, and at the same time the rotating bracket 211 moves relative to the axial direction of the workpiece positioning tube 206, thereby driving the movable sleeve 202 and the scanning assembly 8 to rotate while moving linearly.

[0135] In step S4, when the scanning assembly 8 performs a spiral CT scan on the workpiece 5 inside the workpiece positioning tube 206, the shielding structure 205 is always facing the ray direction of the scanning assembly 8 and rotates synchronously with the scanning assembly 8, thereby shielding the high-energy rays emitted by the scanning assembly 8.

[0136] Compared with the prior art, the technical solution provided in this embodiment has at least one of the following beneficial effects:

[0137] This invention designs a portable high-energy CT detection system with a compact size, suitable for detecting high-density workpieces with an equivalent steel thickness of no more than 180mm and an outer contour of no more than Ф150mm. It has great advantages, especially for workpieces that require in-situ detection.

[0138] Currently, high-energy CT detection systems on the market are generally installed in shielded rooms at fixed locations, occupying a large area (approximately 100m²). 2 The infrastructure investment is large (approximately 10 million), the workpieces to be inspected need to be moved to a fixed machine room for inspection, and usually the workpieces need to be moved or rotated to complete the inspection. The inspection process is cumbersome and the inspection efficiency is low.

[0139] 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 mobile high-energy industrial helical CT system, characterized by, The utility model relates to a kind of scanning system and displacement system;The scanning system is installed above the displacement system (4), and the displacement system (4) can drive the scanning system displacement;The scanning system includes: scanning system shell (1), scanning assembly (8), drive assembly, workpiece support structure (2) and feeding and discharging gate (3);The workpiece support structure (2) is used to support and position the workpiece (5) to be measured;The scanning assembly (8) is used to emit rays and scan the workpiece (5) to be measured;The drive assembly is used to drive the scanning assembly (8) to rotate and move linearly relative to the workpiece (5) to be measured;The feeding and discharging gate (3) can be opened or closed, so that the workpiece can be placed inside the workpiece support structure (2) or taken out from the workpiece support structure (2). The workpiece support structure (2) includes: positioning sleeve (201), movable sleeve (202), fixed cover (204), shielding structure (205) and workpiece positioning tube (206);The positioning sleeve (201) is provided with two and is fixedly connected with the two sides of the scanning system shell (1) respectively;The movable sleeve (202) is symmetrically provided with two, and is slidably sleeved in the two positioning sleeves (201) respectively;The workpiece positioning tube (206) is sleeved in the movable sleeve (202), and the two ends of the workpiece positioning tube (206) are fixedly connected with the two positioning sleeves (201) respectively;The scanning assembly (8) and the shielding structure (205) are arranged on the upper and lower sides of the workpiece positioning tube (206) respectively, and the scanning assembly (8) is used to emit rays to scan the workpiece to be measured;The shielding structure (205) is used to shield the rays;The fixed cover (204) is covered outside the workpiece positioning tube (206), and the upper and lower sides are fixedly connected with the scanning assembly (8) and the shielding structure (205), and the left and right sides are fixedly connected with the movable sleeve (202). The drive assembly includes: rotary drive mechanism (6) and linear drive mechanism (7);The rotary drive mechanism (6) is used to drive the scanning assembly (8) to rotate;The linear drive mechanism (7) is used to realize the overall displacement of the rotary drive mechanism (6).

2. The mobile high-energy industrial helical CT system of claim 1, wherein, The rotary drive mechanism (6) includes: first rotary motor (604), motor gear (603), support frame (601) and drive gear (208) fixed outside the workpiece support structure (2);The scanning assembly (8) is rotatably installed on the support frame (601) through the workpiece support structure (2), and is fixedly connected with the drive gear (208);The first rotary motor (604) is fixedly installed on the support frame (601), and can drive the motor gear (603) to rotate;The drive gear (208) is engaged with the motor gear (603) to drive;When the drive gear (208) rotates, the scanning assembly (8) rotates synchronously.

3. The mobile high-energy industrial helical CT system of claim 2, wherein, The support frame (601) is slidably installed at the bottom of the scanning system shell (1).

4. The mobile high-energy industrial spiral CT system of claim 3, wherein, ​ 5. The mobile high-energy industrial helical CT system of claim 4, wherein, The straight line driving mechanism (7) comprises a sliding positioning plate (701), a straight line rail (702), a bottom plate frame (703), a second rotary motor (704), a screw rod (705) and a supporting sliding block (706); the bottom plate frame (703) is fixedly arranged on the bottom plate of the scanning system shell (1); the straight line rail (702) is fixedly arranged on the bottom plate frame (703), and the sliding positioning plate (701) is in sliding fit with the straight line rail (702); the second rotary motor (704) is fixedly installed on the bottom plate frame (703) and can drive the screw rod (705) to rotate, and the screw rod (705) can drive the supporting sliding block (706) to linearly displace when rotating.

6. The mobile high-energy industrial helical CT system of claim 5, wherein, The supporting sliding block (706) and the sliding positioning plate (701) are both fixedly installed on the bottom of the supporting frame (601).

7. The mobile high-energy industrial spiral CT system of claim 6, wherein, The feeding and discharging gate (3) comprises two groups of gate mechanisms symmetrically arranged; the gate mechanism comprises a gate plate (302) and a straight line push rod (301); the gate plate (302) is provided with a positioning groove, and the positioning groove is used for clamping and fixing the workpiece to be measured; the straight line push rod (301) is used for pushing the gate plate (302) to linearly displace, and then the gate plate (302) can clamp or release the workpiece to be measured.

8. A helical CT scanning method for immobilizing a workpiece, characterized by, The mobile high-energy industrial spiral CT system of any one of claims 1-7 is adopted.

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