Movable high-energy industrial spiral CT system

Abstract

The invention relates to a movable high-energy industrial spiral CT system, belongs to the technical field of CT, and solves the problem that existing CT equipment is difficult to scan a fixed workpiece. The CT system comprises a scanning system and a displacement system, the displacement system can drive the scanning system to move; the scanning system comprises a scanning system shell, a scanning assembly, a driving assembly, a workpiece supporting structure and a feeding and discharging gate. The workpiece supporting structure is used for supporting and positioning a to-be-detected workpiece; the scanning assembly is used for emitting rays and scanning a to-be-detected workpiece; the driving assembly is used for driving the scanning assembly to rotate and linearly move relative to the workpiece to be detected; the feeding and discharging gate can be opened or closed, so that a to-be-detected workpiece can be placed in the workpiece supporting structure or taken out of the workpiece supporting structure. According to the invention, rotation and displacement of the scanning assembly are realized synchronously, a fixed part can be scanned in real time, and the limitation of a use site of a CT machine is overcome.

Description

Technical Field

[0001] The present invention relates to the field of CT technology, and in particular to a mobile high-energy industrial spiral CT system. 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 achieve spiral scanning. The spiral scanning is achieved by superimposing the rotational motion of the radiation source on the CT machine and the linear motion of the object to be tested.

[0003] Existing CT scanning systems occupy a large area and are inconvenient to use. In addition, most existing CT scanning systems are fixed structures that are fixed as a whole and require the object to move in a straight line during scanning. CT scanning cannot be performed on fixed structures / objects, limiting practical applications.

[0004] Therefore, it is necessary 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 fixation of the workpiece. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide a mobile high-energy industrial spiral CT system to solve the problem that the existing CT system is limited in scanning fixed workpieces.

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

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

[0008] The scanning system is installed above the displacement system, and the displacement system can drive the scanning system to move;

[0009] The scanning system comprises: a scanning system housing, a scanning assembly, a driving assembly, a workpiece support structure and a loading and unloading gate;

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

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

[0012] Furthermore, the driving assembly includes: a rotation driving mechanism and a linear driving mechanism; the rotation driving mechanism is used to drive the scanning assembly to rotate; and the linear driving mechanism is used to achieve the overall displacement of the rotation driving mechanism.

[0013] Furthermore, the rotary drive mechanism includes: a first rotary motor, a motor gear, a support frame and a driving gear fixedly mounted on the outside of the workpiece support structure; the scanning assembly is rotatably mounted on the support frame through the workpiece support structure and is fixedly connected to the driving gear; the first rotary motor is fixedly mounted on the support frame and can drive the motor gear to rotate; the driving gear is meshed with the motor gear for transmission; when the driving 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 rail, a base frame, a second rotating motor, a screw and a supporting slider; the base frame is fixedly arranged on the base plate of the scanning system housing; the linear rail is fixedly arranged on the base frame, and the sliding positioning plate is slidably matched with the linear rail; the second rotating motor is fixedly installed on the base frame, and can drive the screw to rotate, and when the screw rotates, it can drive the supporting slider to move linearly.

[0016] Furthermore, the supporting sliding block and the sliding positioning plate are both fixedly mounted on the bottom of the supporting frame.

[0017] Furthermore, the workpiece supporting structure includes: a positioning sleeve, a movable sleeve, and a workpiece positioning tube; two positioning sleeves are provided and are respectively fixedly connected to the two 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 the two ends of the workpiece positioning tube are respectively fixedly connected to the two positioning sleeves.

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

[0019] Furthermore, the loading and unloading gate includes two groups of gate mechanisms symmetrically arranged; the gate mechanism includes: a gate plate and a linear push rod; a positioning groove is provided on the gate plate, and the positioning groove is used to clamp and fix the workpiece to be measured; 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 measured.

[0020] A spiral CT scanning method for a fixed workpiece adopts the above-mentioned mobile high-energy industrial spiral CT system.

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

[0022] 1. The present invention provides a mobile high-energy industrial spiral CT system, which can be used for defect detection of fixed high-density workpieces; the scanning system of the present invention is designed to be movable and rotatable. In order to solve the problem that the workpiece to be tested cannot be disassembled for inspection, the scanning system is driven to rotate and displace relative to the workpiece to be tested by a rotary drive mechanism and a linear drive mechanism, thereby realizing spiral CT scanning under the condition that the workpiece to be tested is fixed.

[0023] 2. In the mobile high-energy industrial spiral CT system of the present invention, the scanning system is integrally mounted on the mobile system, and the scanning system can be moved by the mobile system, thereby realizing flexible transfer of the working scene of the scanning system. The scanning system is compact in size, which solves the problem of high site construction costs for the equipment 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 self-shielding of X-rays. When the scanning assembly performs radiation scanning on the workpiece to be tested in the workpiece positioning tube, it can achieve self-shielding of radiation through the shielding structure, the movable sleeve and the positioning sleeve. While scanning and testing the target workpiece to be tested, it can avoid interference of radiation with other components outside the workpiece.

[0025] 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

[0026] 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.

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

[0028] Figure 2 This is a schematic diagram of the structure before the workpiece to be tested is placed in the mobile high-energy industrial spiral CT system;

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

[0030] Figure 4 A three-dimensional diagram showing the cross-sectional effect of the scanning system;

[0031] Figure 5 It is a front view of the cross-sectional effect of the scanning system;

[0032] Figure 6 This is a schematic diagram of the opening state of the loading and unloading gate;

[0033] Figure 7 It is a schematic diagram of the closed state of the loading and unloading gate;

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

[0035] Fig. 9 is a longitudinal sectional view of the workpiece support structure;

[0036] Fig.10 It is a schematic diagram of the combined state of the scanning assembly and the workpiece support structure;

[0037] Fig.11 It is a schematic diagram of the structural composition of the rotary drive mechanism;

[0038] Fig.12 It is a schematic diagram of the structural composition of the linear drive mechanism;

[0039] Fig.13 It is a schematic diagram of the combined state of the drive assembly and the workpiece support structure;

[0040] Fig.14 It is a schematic diagram of the matching state of the movable sleeve and the workpiece positioning tube of Example 2;

[0041] Fig.15 Schematic diagram of the structural composition of the rotating bracket in Example 2.

[0042] Reference numerals:

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

[0044] 201-positioning sleeve; 202-movable sleeve; 203-first limiting ring; 204-fixed cover; 205-shielding structure; 206-workpiece positioning tube; 207-power supply assembly; 208-driving gear; 209-rotating slip ring; 210-spiral slideway; 211-rotating bracket; 212-support rod; 213-ball;

[0045] 301- linear push rod; 302- gate plate;

[0046] 601-support frame; 602-mounting ring; 603-motor gear; 604-first rotating motor;

[0047] 701-sliding positioning plate; 702-linear rail; 703-bottom plate frame; 704-second rotating motor; 705-screw rod; 706-supporting slider; 707-positioning block. DETAILED DESCRIPTION

[0048] 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.

[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 installed above the displacement system 4, and the displacement system 4 can drive the scanning system to move;

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

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

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

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

[0056] In this embodiment, the trailer assembly can select an existing robot trailer that meets the load-bearing requirements of the scanning system of this embodiment.

[0057] Alternatively, in this embodiment, the displacement drive mechanism includes: a three-degree-of-freedom displacement drive mechanism consisting of an X-axis displacement drive mechanism, a Y-axis displacement drive mechanism and a Z-axis displacement drive mechanism; during implementation, the X-axis displacement drive mechanism, the Y-axis displacement drive mechanism and the Z-axis displacement drive mechanism are connected in series in sequence to form a three-degree-of-freedom displacement drive mechanism, and then the scanning system is fixedly installed on the end motion platform.

[0058] Furthermore, when the workpiece 5 to be measured 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, and then the horizontal displacement of the scanning system is driven by the displacement system 4, so that the workpiece 5 to be measured (relative motion) can be extended into the interior of the workpiece support structure 2, and then the workpiece 5 to be measured is scanned by the scanning assembly 8.

[0059] Similarly, when the workpiece 5 to be measured 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 displacement system 4 drives the workpiece support structure 2 to be horizontally displaced until the workpiece 5 to be measured is aligned. Then, the displacement system 4 drives the scanning system and the workpiece support structure to move up and down as a whole to cover the workpiece 5 to be measured into the interior of the workpiece support structure 2.

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

[0061] In a specific implementation 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, Fig.10 As shown, the scanning assembly 8 is rotatably mounted on the support frame 601 through the workpiece supporting structure 2 and is fixedly connected to the driving gear 208 .

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

[0064] Furthermore, the first rotating motor 604 is fixedly mounted on the supporting frame 601 , and the output shaft is fixedly connected to the motor gear 603 , so as to drive the motor gear 603 to rotate.

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

[0066] That is to say, when the first rotary motor 604 drives the driving gear 2008 to rotate via the motor gear 603 , the movable sleeve 202 and the driving 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. Fig.11 shown.

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

[0069] Furthermore, if Fig.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 rotating motor 604 .

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

[0071] In a specific embodiment of the present invention, Fig.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 supporting slider 706 .

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

[0073] Specifically, Fig.12 As shown, the linear track 702 is fixedly arranged on the bottom plate frame 703 , and the sliding positioning plate 701 is slidably matched with the linear track 702 .

[0074] Furthermore, if Fig.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; Fig.13 shown.

[0076] like Fig.12 As shown, the second rotary motor 704 is fixedly mounted on the bottom plate frame 703 and can drive the screw rod 705 to rotate. When the screw rod 705 rotates, it can drive the support slider 706 to move linearly; specifically, the screw rod 705 and the support slider 706 are screwed together by threads. In other words, the support frame 601, the sliding positioning plate 701 and the linear track 702 jointly limit the movement of the support slider 706 to linear displacement, and the screw rod 705 and the support slider 706 form a screw nut pair. When the second rotary motor 704 drives the screw rod 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, the supporting slider 706 and the sliding positioning plate 701 are both fixedly mounted on the bottom of the supporting frame 601 .

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

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

[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 two 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 mounted on 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 is sleeved on the outside of the movable sleeve 202. Furthermore, a second limiting ring is fixedly mounted on 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, a first limiting ring 203 protruding inwardly is fixedly installed at the end of the positioning sleeve 201, and a second limiting ring protruding outwardly is installed at 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 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, and then the rotation and displacement of the scanning assembly 8 can be realized through the relative rotation and relative sliding of the movable sleeve 202 inside the positioning sleeve 201.

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

[0086] In a specific embodiment of the present invention, Fig. 9As shown, the workpiece supporting structure 2 further includes: a fixed cover 204 and a shielding structure 205 .

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

[0088] Specifically, the scanning assembly 8 and the shielding structure 205 are respectively arranged on the upper and lower sides of the workpiece positioning tube 206 , and are both fixedly connected to the fixed cover 204 , and 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 radiation to scan the workpiece to be measured.

[0090] Furthermore, the shielding structure 205 is used to shield radiation; the fixed cover 204 is arranged on the outside of the workpiece positioning tube 206, and the upper and lower sides are fixedly connected to the scanning assembly 8 and the shielding structure 205, and the 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 in a semi-enclosed state under the workpiece positioning tube 206; thus, the workpiece support structure 2 composed of the shielding structure 205, the movable sleeve 202 and the positioning sleeve 201 can form an enveloping shielding tube for the workpiece positioning tube 206, and thus the scanning system can achieve self-shielding of the X-rays emitted by the scanning assembly 8 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.

[0093] In this embodiment, by symmetrically setting two movable sleeves 202 to be slidably sleeved on the outside of the workpiece positioning tube 206, and at the same time, the two movable sleeves 202 are respectively slidably sleeved on the inside of the two positioning sleeves 201, not only can the rays emitted by the scanning assembly 8 be shielded, but also because the movable sleeve 202 and the positioning sleeve 201 can slide and rotate relative to each other, it is possible to achieve superimposed rotational motion and displacement motion of the scanning assembly 8 under the premise of self-shielding, and realize the spiral scanning of the workpiece 5 to be measured by the scanning assembly 8. The workpiece support structure 2 of the present invention can realize spiral motion at the same time while having good self-shielding performance, thereby achieving the simultaneous improvement of shielding performance and mechanical performance.

[0094] In a specific embodiment of the present invention, Figure 6 , Figure 7 As shown, the loading and unloading gate 3 includes two groups of gate mechanisms that are symmetrically arranged.

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

[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 groups of gate mechanisms drive the gate plates 302 to move linearly, the two gate plates 302 move closer to or farther away from each other, and then the gate plates 302 can clamp or release the workpiece to be measured.

[0097] When implementing:

[0098] The present invention rotatably mounts a scanning assembly consisting of a high-energy X-ray emitter and a detector on a rotating drive mechanism 6, which can achieve 360° continuous rotation, can perform spiral scanning on the internal structure of a high-density workpiece, generate high-quality structural images, and extract information useful to the user.

[0099] The movable 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 detected. By setting a dual moving mechanism, the spiral CT scanning system of the present invention can complete the scanning function of conventional high-energy detection equipment and eliminate its limitations on the state and site of the workpiece to be detected.

[0100] The spiral CT scanning system of the present invention can realize CT scanning of the workpiece to be inspected which is not allowed to be disassembled and moved, and does not need to build a huge infrastructure, thus saving high infrastructure costs and fixed land, and can realize flexible application without being restricted by the site.

[0101] The movable high-energy CT detection system of the present invention can shield the high-energy rays emitted by the scanning assembly 8 by setting a multi-layer nested shielding structure composed of a workpiece positioning tube 206, a movable sleeve 202 and a positioning sleeve 201, and can effectively avoid the leakage of rays. The scanning system can realize high-energy scanning of the workpiece 5 to be tested without being in a shielded room, overcoming the limitation that the existing high-energy scanning equipment can only scan 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 improved on the basis of embodiment 1:

[0104] In this embodiment, Fig.14 , Fig.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 a plurality of support rods 212 are circumferentially arranged on the other side, and a ball 213 is nested and installed on the inner side of the support rod 212.

[0105] Correspondingly, a spiral slide 210 is arranged on the outer side of the workpiece positioning tube 206, and the ball 213 can be inserted into the spiral slide 210, and the ball 213 can slide or roll along the spiral slide 210; when the ball 213 slides or rolls along the spiral slide 210, the rotating bracket 211 can rotate circumferentially and displace in the axial direction relative to the workpiece positioning tube 206, thereby driving the movable sleeve 202 and the scanning assembly 8 to rotate and displace.

[0106] Furthermore, the support rods 212 are provided in plurality, and correspondingly, the installation positions of the balls 213 on the plurality of support rods 212 are different; specifically, the plurality of balls 213 are staggeredly arranged along the axial direction of the rotating bracket 211 .

[0107] In a specific implementation of this embodiment, Fig.15 As shown, there are four support rods 212, and the four support rods 212 are arranged at intervals of 90°. Correspondingly, there are also four balls 213, and the four balls 213 are arranged at intervals of 90° in the circumferential direction. At the same time, the axial spacing 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 cooperation between the sliding positioning plate 701 and the linear track 702 .

[0109] During implementation, rotating the rotating bracket 211 can screw multiple balls 213 into the spiral slide 210 in turn, 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 frame 703.

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

[0111] The motion driving method of the scanning assembly 8 of the present embodiment omits the linear driving mechanism, and only requires sliding installation of the support frame 601 and the bottom plate of the scanning system housing 1, so that only the rotation driving mechanism 6 is set, and the scanning assembly 8 is driven to rotate by a first rotation motor 604 while realizing its linear displacement, that is, the present embodiment realizes the spiral driving of the scanning assembly 8, and then when the scanning assembly 8 emits high-energy rays to perform slice scanning on the workpiece 5 to be measured, it can synthesize a spiral CT scanning image of the workpiece to be measured.

[0112] Example 3

[0113] A spiral CT scanning method for a fixed 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 comprises the following steps:

[0115] Step S1: adjusting 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 by the moving system until the workpiece to be measured extends into the interior of 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 process;

[0118] Step S4: the scanning assembly 8 emits X-rays to perform a spiral CT scan on the workpiece 5 to be measured.

[0119] Specifically, in step S1, the principle for aligning the scanning system with the workpiece 5 to be measured is that the workpiece 5 to be measured and the tube mouth of the workpiece positioning tube 206 are located in the same straight line; it is worth noting that, in the present invention, it is not required that the axis of the workpiece 5 to be measured and the workpiece positioning tube 206 be aligned, and the linear displacement of the scanning system can cover the workpiece 5 to be measured into the workpiece positioning tube 206.

[0120] Furthermore, in the step S2 , when the loading and unloading gate 3 is opened, the two gate plates 302 are driven by the linear push rod 301 to move to the position farthest from the axis of the workpiece positioning tube 206 .

[0121] Furthermore, 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 toward the direction of the workpiece 5 to be measured until the gate plate 302 contacts one side of the workpiece 5 to be measured; 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 measured.

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

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

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

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

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

[0127] First, the linear displacement mode of the scanning assembly 8 is:

[0128] Step S311: the second rotary motor 704 drives the screw rod 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 bottom frame 703; when the screw rod 705 rotates, the support slider 706 and the support frame 601 are driven to move linearly;

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

[0131] Second, another linear displacement mode of the scanning assembly 8 is:

[0132] Step S321: Slidingly mounting the support frame 601 on the bottom plate of the scanning system housing 1;

[0133] Step S322: the ball 213 on the rotating bracket 211 at the end of the movable sleeve 202 cooperates with the spiral slideway 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 the rotating bracket 211 is displaced relative to the axial direction of the workpiece positioning tube 206, thereby driving the movable sleeve 202 and the scanning assembly 8 to rotate and displace linearly at the same time.

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

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

[0137] The present invention designs a movable high-energy CT detection system with compact size, which is suitable for detecting high-density workpieces with equivalent steel thickness not greater than 180mm and outer contour not greater than Ф150mm, and has great advantages especially for workpieces that need in-situ detection.

[0138] The current high-energy CT detection system on the market is generally installed in a shielded room at a fixed location, occupying a large area (about 100m 2 ), the infrastructure investment is large (about 10 million), the workpiece to be inspected needs to be moved to a fixed location in the machine room for inspection, and the workpiece usually needs 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 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 mobile high-energy industrial spiral CT system, characterized in that: include: Scanning system and displacement system; The scanning system is installed above the displacement system (4), and the displacement system (4) is capable of driving the scanning system to move; The scanning system comprises: a scanning system housing (1), a scanning assembly (8), a driving assembly, a workpiece support structure (2) and a loading and unloading 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 radiation and scan the workpiece (5) to be measured; and the driving assembly is used to drive the scanning assembly (8) to perform rotational motion and linear motion relative to the workpiece (5) to be measured; The loading and unloading gate (3) can be opened or closed, so that the workpiece to be measured can be placed into the workpiece support structure (2) or taken out from the workpiece support structure (2).

2. The mobile high-energy industrial spiral CT system according to claim 1, characterized in that: The driving assembly comprises: a rotary driving mechanism (6) and a linear driving mechanism (7); the rotary driving mechanism (6) is used to drive the scanning assembly (8) to rotate; and the linear driving mechanism (7) is used to achieve the overall displacement of the rotary driving mechanism (6).

3. The mobile high-energy industrial spiral CT system according to claim 2, characterized in that: The rotary drive mechanism (6) comprises: a first rotary motor (604), a motor gear (603), a support frame (601) and a driving gear (208) fixedly mounted on the outside of the workpiece support structure (2); the scanning assembly (8) is rotatably mounted on the support frame (601) via the workpiece support structure (2) and is fixedly connected to the driving gear (208); the first rotary motor (604) is fixedly mounted on the support frame (601) and is capable of driving the motor gear (603) to rotate; the driving gear (208) is meshed with the motor gear (603) for transmission; when the driving gear (208) rotates, the scanning assembly (8) rotates synchronously.

4. The mobile high-energy industrial spiral CT system according to claim 3, characterized in that: The support frame (601) is slidably mounted on the bottom of the scanning system housing (1).

5. The mobile high-energy industrial spiral CT system according to claim 4, characterized in that: The linear drive mechanism (7) comprises: a sliding positioning plate (701), a linear track (702), a base frame (703), a second rotating motor (704), a lead screw (705) and a supporting slider (706); the base frame (703) is fixedly arranged on the base plate of the scanning system housing (1); the linear track (702) is fixedly arranged on the base frame (703), and the sliding positioning plate (701) and the linear track (702) are slidably matched; the second rotating motor (704) is fixedly installed on the base frame (703) and can drive the lead screw (705) to rotate, and when the lead screw (705) rotates, it can drive the supporting slider (706) to move linearly.

6. The mobile high-energy industrial spiral CT system according to claim 5, characterized in that: The supporting slide block (706) and the sliding positioning plate (701) are both fixedly mounted on the bottom of the supporting frame (601).

7. The mobile high-energy industrial spiral CT system according to claim 5, characterized in that: The workpiece support structure (2) comprises: a positioning sleeve (201), a movable sleeve (202), and a workpiece positioning tube (206); two positioning sleeves (201) are provided and are respectively fixedly connected to two sides of the scanning system housing (1); two movable sleeves (202) are symmetrically provided and are respectively slidably sleeved inside the two positioning sleeves (201); the workpiece positioning tube (206) is sleeved inside the movable sleeve (202), and two ends of the workpiece positioning tube (206) are respectively fixedly connected to the two positioning sleeves (201).

8. The mobile high-energy industrial spiral CT system according to claim 7, characterized in that: The workpiece support structure (2) further comprises: a fixed cover (204) and a shielding structure (205); the scanning assembly (8) and the shielding structure (205) are respectively arranged on the upper and lower sides of the workpiece positioning tube (206); the scanning assembly (8) is used to emit radiation to scan the workpiece to be measured; the shielding structure (205) is used to shield the radiation; the fixed cover (204) is arranged outside the workpiece positioning tube (206), and the upper and lower sides are fixedly connected to the scanning assembly (8) and the shielding structure (205), and the left and right sides are fixedly connected to the movable sleeve (202).

9. The mobile high-energy industrial spiral CT system according to claim 8, characterized in that: The loading and unloading gate (3) comprises two groups of gate mechanisms which are symmetrically arranged; the gate mechanism comprises: a gate plate (302) and a linear push rod (301); a positioning groove is arranged on the gate plate (302), and the positioning groove is used to clamp and fix the workpiece to be measured; the linear push rod (301) is used to push the gate plate (302) to move linearly, so that the gate plate (302) can clamp or release the workpiece to be measured.

10. A spiral CT scanning method for a fixed workpiece, characterized in that: A mobile high-energy industrial spiral CT system is used as described in any one of claims 1 to 9.

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