Scanning inspection apparatus

Abstract

The application relates to a scanning inspection device, which comprises a first rotating frame (1), a first driving device, a ray source (2), a detector (3), a cooling device for cooling the ray source (2) and a second driving device, the center of the first rotating frame (1) is provided with a conveying channel for passing an object (6), the first driving device is drivingly connected with the first rotating frame (1) to drive the first rotating frame (1) to rotate, the ray source (2), the detector (3) and the cooling device for cooling the ray source (2) are all mounted on the first rotating frame (1) and rotate with the first rotating frame (1), and the second driving device is configured to drive the cooling device to rotate in a direction opposite to the rotating direction of the first rotating frame (1) so that the cooling device can keep a fixed posture during the rotation with the first rotating frame (1). The application can realize the cooling of the ray source, and the cooling device can keep a fixed posture during the rotation, and the cooling device is prevented from tilting or inverting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of security inspection, in particular to a scanning inspection device. BACKGROUND

[0002] In the field of container security inspection, most of the inspection equipment used is single-view or double-view transmission equipment. The system uses the intensity change of high-energy X-rays generated by the ray source after passing through the inspected object to reflect the density distribution of the inspected object, and converts the intensity change of the rays into image gray scale to obtain a transmission image. However, when the goods in the container are overlapped and placed, and the texture of the goods is complex, it is difficult to determine the hidden objects in the container through a single-view or double-view transmission image, and the accuracy is not high.

[0003] In order to solve the above problems, there is a container inspection system with CT tomographic scanning function in the related art. The system can perform tomographic scanning on the suspicious parts of the inspected object and reconstruct a two-dimensional image of the cross section of the inspected object. This inspection system can continuously rotate and scan, so it can perform three-dimensional reconstruction on the inspected object and provide more information. However, in container inspection, due to the high energy of the ray source, a large amount of heat is generated, which can easily damage the ray source itself and adjacent components, causing the ray source and adjacent components to malfunction and affecting the normal operation of the inspection system. How to cool the ray source has become an important problem that needs to be solved.

[0004] It should be noted that the information disclosed in the background section of the present application is only intended to increase the understanding of the overall background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0005] The embodiment of the present application provides a scanning inspection device, which can cool the ray source in time and effectively.

[0006] According to one aspect of the present application, a scanning inspection device is provided, comprising:

[0007] a first rotating frame, the center of which is provided with a conveying channel for the inspected object to pass through;

[0008] a first driving device drivingly connected with the first rotating frame to drive the first rotating frame to rotate;

[0009] a ray source, a detector, and a cooling device for cooling the ray source, all of which are installed on the first rotating frame and rotate with the first rotating frame; and

[0010] a second driving device configured to drive the cooling device to rotate in a direction opposite to the rotation direction of the first rotating frame, so that the cooling device maintains a fixed posture during rotation with the first rotating frame.

[0011] In some embodiments, the cooling device is arranged outside the scanning range of the radiation source.

[0012] In some embodiments, the scanning inspection device further comprises a second rotating frame, the cooling device is mounted on the second rotating frame, and the second driving device is drivingly connected with the second rotating frame to drive the second rotating frame to rotate relative to the first rotating frame.

[0013] In some embodiments, the cooling device comprises a refrigeration device and a first conveying pipe, the first conveying pipe is in communication with the refrigeration device and is used to convey heat exchange medium from the refrigeration device to the radiation source for cooling.

[0014] In some embodiments, the cooling device further comprises a second conveying pipe, the second conveying pipe is connected between the outlet of the first conveying pipe and the refrigeration device to send the heat exchange medium back to the refrigeration device after heat exchange with the radiation source.

[0015] In some embodiments, the scanning inspection device further comprises a rotary joint, the rotary joint comprises a first stator and a first rotor rotatably connected with the first stator, the first stator is connected with the first rotating frame, the first rotor is connected with the second rotating frame, the first conveying pipe comprises a first pipe section and a second pipe section, the first pipe section is connected between the refrigeration device and the first stator, the second pipe section is connected on the first rotor, and the first pipe section and the second pipe section are in fluid communication through a first fluid passage between the first stator and the first rotor.

[0016] In some embodiments, the scanning inspection device further comprises a rotary joint, the rotary joint comprises a first stator and a first rotor rotatably connected with the first stator, the first stator is connected with the first rotating frame, the first rotor is connected with the second rotating frame, the first conveying pipe comprises a first pipe section and a second pipe section, the first pipe section is connected between the refrigeration device and the first stator, the second pipe section is connected on the first rotor, and the first pipe section and the second pipe section are in fluid communication through a first fluid passage between the first stator and the first rotor, the second conveying pipe comprises a third pipe section and a fourth pipe section, the third pipe section is connected between the outlet of the second pipe section and the first rotor, the fourth pipe section is connected between the first stator and the refrigeration device, and the third pipe section and the fourth pipe section are in fluid communication through a second fluid passage between the first stator and the first rotor.

[0017] In some embodiments, the scanning inspection device further comprises a first slip ring, a first cable and a second cable, the first slip ring comprises a second stator and a second rotor rotatably connected with the second stator, the second stator is connected with the first rotating frame, the second rotor is connected with the second rotating frame, the first cable is connected between the power supply and the second stator, the second cable is connected between the second rotor and the electrical outlet of the refrigeration device, the first cable and the second cable are electrically connected through an electrical connection circuit between the second stator and the second rotor, the rotation axis of the rotary joint, the rotation axis of the first slip ring and the axis of the second rotating frame relative to the first rotating frame are collinear.

[0018] In some embodiments, the first rotating frame comprises a first support plate and a second support plate connected with the first support plate, the first support plate and the second support plate have a preset distance, the second rotating frame is arranged between the first support plate and the second support plate, the rotary joint is arranged between the second rotating frame and the first support plate, and the first slip ring is arranged between the second rotating frame and the second support plate.

[0019] In some embodiments, the scanning inspection device further comprises a first support body, a second support body, a first rotary support and a second rotary support, the first support body is connected with the first support plate, the first rotary support is supported on the first support body and connected with the second rotating frame, the second support body is connected with the second support plate, and the second rotary support is supported on the second support body and connected with the second rotating frame.

[0020] In some embodiments, the first support body comprises a first hollow cylinder, and the first stator is installed in the first hollow cylinder; and / or, the second support body comprises a second hollow cylinder, and the second stator is installed in the second hollow cylinder.

[0021] In some embodiments, the outer ring of the first rotary support and / or the second rotary support is provided with external teeth, the second driving device comprises a gear and a driving unit, the gear is engaged with the external teeth, and the driving unit is used to drive the gear to rotate.

[0022] In some embodiments, the scanning inspection device further comprises a second slip ring, the second slip ring is connected between the first cable and the power supply, and the rotation axis of the second slip ring is collinear with the rotation axis of the first rotating frame.

[0023] In some embodiments, the scanning inspection device further comprises a detection device for detecting the rotation angle of the second rotating frame, and the second driving device is signal connected with the detection device to adjust the rotation angle of the second rotating frame relative to the first rotating frame according to the detection result of the detection device.

[0024] In some embodiments, the detection device comprises an encoder.

[0025] Based on the above technical solution, the embodiments of the present invention drive the X-ray source and detector to rotate relative to the object being inspected by rotating the first rotating frame, which can achieve 360° scanning inspection of the object being inspected, improving the comprehensiveness and reliability of the scanning inspection; moreover, the first rotating frame is also equipped with a cooling device, which can cool the X-ray source in a timely manner to prevent the X-ray source from overheating due to excessive working time and causing malfunction or damage; it also includes a second driving device, which can drive the cooling device to rotate in the opposite direction to the rotation direction of the first rotating frame, so as to maintain the relatively fixed posture of the cooling device and prevent the cooling device from malfunctioning or failing due to tilting or inversion during the rotation with the first rotating frame, which is conducive to ensuring the normal operation of the cooling device during the rotation process. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of one embodiment of the scanning and inspection device of the present invention.

[0028] Figure 2 This is a diagram showing the changing states of an embodiment of the scanning and inspection device of the present invention during rotation.

[0029] Figure 3 This is a side view of an embodiment of the scanning and inspection apparatus of the present invention.

[0030] Figure 4 This is a schematic diagram of the second rotating frame and its cooperating structure in one embodiment of the scanning and inspection device of the present invention.

[0031] Figure 5 This is a cross-sectional view of the second rotating frame and its cooperating structure in one embodiment of the scanning and inspection device of the present invention.

[0032] In the picture:

[0033] 1. First rotating frame; 1a. First support plate; 1b. Second support plate; 2. X-ray source; 3. Detector; 4. Cooling device; 5. Conveying device; 6. Object under inspection; 7. Second rotating frame; 8. Rotary joint; 81. First stator; 82. First rotor; 9. First conveying pipe; 91. First pipe section; 92. Second pipe section; 10. Second conveying pipe; 101. Third pipe section; 102. Fourth pipe section; 11. First slip ring; 111. Second stator; 112. Second rotor; 12. Connecting cable; 121. First cable; 122. Second cable; 13. First support body; 14. Second support body; 15. First rotary support; 16. Second rotary support; 161. External tooth. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the protection scope of the present application.

[0036] In order to cool the ray source in the rotary scanning inspection system, the inventor has made various attempts and found that the ray source is continuously rotated during the inspection process. If the cooling system is arranged at a fixed position, the connecting device between the cooling system and the ray source will be wound and twisted during the rotation of the ray source, and the connecting line will be broken after a long rotation time, affecting the normal work of the scanning system. If the cooling system rotates together with the ray source, the cooling system will be inclined or inverted relative to the ground, for example, the cooling system includes a compressor, and the compressor will malfunction after being inclined or inverted, so simply setting the cooling system to rotate together with the ray source will also have some problems.

[0037] After further research, the inventor proposes a technical solution of setting the cooling system to rotate together with the ray source and also rotate relative to the ray source, which can effectively solve the problem of malfunction caused by the inclination or inversion of the cooling system, and also can effectively cool the ray source.

[0038] As Figures 1 to 3As shown in some embodiments of the scanning inspection device provided by the present application, the scanning inspection device comprises a first rotating frame 1, a first driving device, a ray source 2, a detector 3, a second driving device and a cooling device for cooling the ray source 2, the center of the first rotating frame 1 is provided with a conveying passage for the passing of an object 6 to be inspected, the first driving device is drivingly connected with the first rotating frame 1 to drive the first rotating frame 1 to rotate, the ray source 2, the detector 3 and the cooling device for cooling the ray source 2 are all mounted on the first rotating frame 1 and rotate with the first rotating frame 1, and the second driving device is configured to drive the cooling device to rotate in a direction opposite to the rotating direction of the first rotating frame 1 so as to keep the posture of the cooling device fixed during the rotation of the first rotating frame 1.

[0039] In the above-mentioned embodiments, the rotation of the first rotating frame 1 drives the ray source 2 and the detector 3 to rotate relative to the object 6 to be inspected, so that the scanning inspection of 360° can be realized for the object 6 to be inspected, and the comprehensiveness and reliability of the scanning inspection are improved; moreover, the cooling device is further provided on the first rotating frame 1 to cool the ray source in time, so as to prevent the ray source from being damaged or malfunctioning due to too much heat caused by too long working time; the scanning inspection device further comprises the second driving device to drive the cooling device to rotate in a direction opposite to the rotating direction of the first rotating frame 1, so as to keep the posture of the cooling device relatively fixed, prevent the cooling device from tilting or inverting during the rotation of the first rotating frame 1, and ensure the normal working of the cooling device during the rotation.

[0040] In some embodiments, the first driving device drives the first rotating frame 1 to rotate relative to the ground, the ray source 2, the detector 3 and the cooling device revolve with the first rotating frame 1, and the cooling device further rotates relative to the first rotating frame 1, the rotating direction of the cooling device is opposite to the revolving direction, so as to keep the posture of the cooling device relatively fixed relative to the ground, for example, keep the cooling device vertical during the revolution, prevent the cooling device from tilting or inverting, and ensure the normal working of the cooling device.

[0041] As shown in some embodiments, the first rotating frame 1 is provided with a conveying passage for the passing of an object 6 to be inspected, the ray source 2 and the detector 3 are arranged on the conveying passage, and the ray source 2 emits rays which are received by the detector 3 after penetrating the object 6 to be inspected, so as to realize the scanning inspection. Figure 2

[0042] In some embodiments, the ray source 2 and the detector 3 have a spacing in the circumferential direction of the first rotating frame 1, the rays emitted by the ray source 2 irradiate the object 6 to be inspected located in the conveying passage, and the rays penetrate the object 6 to be inspected and are received by the detector 3, so as to realize the scanning inspection.

[0043] In some embodiments, the conveying passage is provided with a conveying device 5, the conveying device 5 is used to convey the object 6 to be inspected through the conveying passage, and the scanning inspection is completed during the conveying process. The conveying device 5 can adopt a conveying belt or a conveying chain, etc.​

[0044] In some embodiments, the cooling device is arranged outside the scanning range of the ray source 2. Such arrangement can avoid the cooling device affecting the scanning inspection of the object 6, and improve the accuracy of the scanning inspection.

[0045] In some embodiments, the scanning inspection device further comprises a second rotating frame 7, the second rotating frame 7 is mounted on the first rotating frame 1, the cooling device is mounted on the second rotating frame 7, and the second driving device is drivingly connected with the second rotating frame 7 to drive the second rotating frame 7 to rotate relative to the first rotating frame 1.

[0046] By arranging the second rotating frame 7, the cooling device can be driven to rotate by the rotation of the second rotating frame 7, which facilitates the installation of the cooling device, and can avoid the direct connection between the cooling device and the second driving device, which is conducive to protecting the cooling device.

[0047] In some embodiments, the cooling device comprises a refrigeration device 4 and a first conveying pipe 9, the first conveying pipe 9 is in communication with the refrigeration device 4 and is used to convey heat exchange medium from the refrigeration device 4 to the ray source 2 to cool the ray source 2. A part of the heat exchange medium from the refrigeration device 4 is used to cool the ray source 2, and the heat exchange medium can absorb the heat emitted by the ray source 2, thereby avoiding damage to the ray source 2 or adjacent components caused by the heat emitted by the ray source 2, and improving the service life of the ray source 2 and adjacent components.

[0048] In some embodiments, the cooling device further comprises a second conveying pipe 10, the second conveying pipe 10 is connected between the outlet of the first conveying pipe 9 and the refrigeration device 4 to send the heat exchange medium after heat exchange with the ray source 2 back to the refrigeration device 4.

[0049] By arranging the second conveying pipe 10, the refrigeration device 4, the first conveying pipe 9 and the second conveying pipe 10 form a closed loop, which can realize continuous cooling of the ray source 2, and can also simplify the structure of the cooling device and reduce the connection between the cooling device and other components that do not rotate with the first rotating frame 1.

[0050] In some embodiments, the first conveying pipe 9 is wound around the outer periphery of the ray source 2, and the heat exchange medium in the first conveying pipe 9 exchanges heat with the ray source 2; or the first conveying pipe 9 is in communication with a cooling flow path inside the ray source 2, and the first conveying pipe 9 conveys heat exchange medium to the inside of the ray source 2 to cool the ray source 2.

[0051] In some embodiments, the refrigeration device 4 comprises a compressor, a condenser and a throttling element, and the heat exchange section of the first conveying pipe 9 can be used as an evaporator of the refrigeration device 4 to realize a refrigeration cycle. The heat exchange medium conveyed by the first conveying pipe 9 is refrigerant.

[0052] In some embodiments, the cooling device 4 comprises a compressor, a condenser, a throttling element and an evaporator. The heat exchange medium delivered by the first delivery pipe 9 exchanges heat with the evaporator in the cooling device 4, and the cooled heat exchange medium is delivered to the ray source 2 to cool the ray source 2. The heat exchange medium can be water or the like.

[0053] Since the first delivery pipe 9 is arranged between the cooling device and the ray source 2, the ray source 2 revolves with the first rotating frame 1, and the cooling device revolves and rotates at the same time. In order to avoid the first delivery pipe 9 from being wound and twisted, the first delivery pipe 9 can be connected through the rotary joint.

[0054] In some embodiments, the scanning inspection device further comprises a rotary joint 8, the rotary joint 8 comprises a first stator 81 and a first rotor 82 rotationally connected with the first stator 81, the first stator 81 is connected with the first rotating frame 1, the first rotor 82 is connected with the second rotating frame 7, the first delivery pipe 9 comprises a first pipe segment 91 and a second pipe segment 92, the first pipe segment 91 is connected between the cooling device 4 and the first stator 81, the second pipe segment 92 is connected on the first rotor 82, and the first pipe segment 91 and the second pipe segment 92 are in fluid communication through a first fluid passage between the first stator 81 and the first rotor 82.

[0055] By arranging the rotary joint 8, the second pipe segment 92 can rotate relative to the first pipe segment 91, and the winding of the first delivery pipe 9 caused by the rotation of the cooling device can be avoided on the basis of realizing the delivery of the heat exchange medium.

[0056] For the embodiment in which the scanning inspection device further comprises a second delivery pipe 10, the scanning inspection device further comprises a rotary joint 8, the rotary joint 8 comprises a first stator 81 and a first rotor 82 rotationally connected with the first stator 81, the first stator 81 is connected with the first rotating frame 1, the first rotor 82 is connected with the second rotating frame 7, the first delivery pipe 9 comprises a first pipe segment 91 and a second pipe segment 92, the first pipe segment 91 is connected between the cooling device 4 and the first stator 81, the second pipe segment 92 is connected on the first rotor 82, and the first pipe segment 91 and the second pipe segment 92 are in fluid communication through a first fluid passage between the first stator 81 and the first rotor 82, the second delivery pipe 10 comprises a third pipe segment 101 and a fourth pipe segment 102, the third pipe segment 101 is connected between the outlet of the second pipe segment 92 and the first rotor 82, the fourth pipe segment 102 is connected between the first stator 81 and the cooling device 4, and the third pipe segment 101 and the fourth pipe segment 102 are in fluid communication through a second fluid passage between the first stator 81 and the first rotor 82.

[0057] By adopting the rotary joint 8 with the first fluid passage and the second fluid passage, the winding of the first delivery pipe 9 and the second delivery pipe 10 can be avoided at the same time.

[0058] In some embodiments, the number of first conveying pipes 9 is two or more, and the number of second conveying pipes 10 can also be two or more.

[0059] For the cooling device that needs to be connected with a power supply, the problem of the entanglement of the connecting cable also needs to be solved.

[0060] In some embodiments, the scanning inspection device further comprises a first slip ring 11 and a connecting cable 12, the connecting cable 12 comprises a first cable 121 and a second cable 122, the first slip ring 11 comprises a second stator 111 and a second rotor 112 rotationally connected with the second stator 111, the second stator 111 is connected with the first rotating frame 1, the second rotor 112 is connected with the second rotating frame 7, the first cable 121 is connected between the power supply and the second stator 111, the second cable 122 is connected between the second rotor 112 and the electric socket of the refrigeration device 4, the first cable 121 and the second cable 122 are electrically connected through the electrical connection circuit between the second stator 111 and the second rotor 112, the rotation axis of the rotary joint 8, the rotation axis of the first slip ring 11 and the axis of the rotation of the second rotating frame 7 relative to the first rotating frame 1 are collinear.

[0061] By arranging the first slip ring 11, the second cable 122 can rotate relative to the first cable 121, thereby avoiding the entanglement of the connecting cable caused by the self-rotation of the cooling device.

[0062] By arranging the rotation axis of the rotary joint 8, the rotation axis of the first slip ring 11 and the axis of the rotation of the second rotating frame 7 relative to the first rotating frame 1 to be collinear, the entanglement of the first conveying pipe 9, the second conveying pipe 10 and the connecting cable 12 can be avoided at the same time when the cooling device rotates.

[0063] As shown in Figure 4 and Figure 5 In some embodiments, the first rotating frame 1 comprises a first support plate 1a and a second support plate 1b connected with the first support plate 1a, the first support plate 1a and the second support plate 1b have a preset distance, the second rotating frame 7 is arranged between the first support plate 1a and the second support plate 1b, the rotary joint 8 is arranged between the second rotating frame 7 and the first support plate 1a, and the first slip ring 11 is arranged between the second rotating frame 7 and the second support plate 1b. In this way, the rotation axis of the rotary joint 8, the rotation axis of the first slip ring 11 and the axis of the rotation of the second rotating frame 7 relative to the first rotating frame 1 can be collinear, and the relative independence of the heat exchange medium and the electrical connection can also be realized, thereby avoiding the mutual crossing and mutual influence of the first conveying pipe 9, the second conveying pipe 10 and the connecting cable 12.

[0064] In some embodiments, the scanning inspection device further comprises a first support body 13 connected with the first support plate 1a, a first rotary support 15 supported on the first support body 13 and connected with the second rotary frame 7, a second support body 14 connected with the second support plate 1b, and a second rotary support 16 supported on the second support body 14 and connected with the second rotary frame 7.

[0065] By arranging the first support body 13, the second support body 14, the first rotary support 15 and the second rotary support 16, the second rotary frame 7 can be supported, and sufficient space can be left for the arrangement of the rotary joint 8, the first slip ring 11, the first conveying pipe 9, the second conveying pipe 10 and the connecting cable 12.

[0066] In some embodiments, the first support body 13 comprises a first hollow cylinder, and the first stator 81 is arranged in the first hollow cylinder; and / or the second support body 14 comprises a second hollow cylinder, and the second stator 111 is arranged in the second hollow cylinder.

[0067] The first support body 13 and the second support body 14 comprise hollow cylinders, which can reduce the weight of the first support body 13 and the second support body 14, and facilitate the arrangement of the rotary joint 8 and the first slip ring 11.

[0068] In some embodiments, the first hollow cylinder is provided with a first positioning plate, and the first stator 81 is arranged on the first positioning plate; and / or the second hollow cylinder is provided with a second positioning plate, and the second stator 111 is arranged on the second positioning plate.

[0069] In some embodiments, one side of the second rotary frame 7 is provided with a third positioning plate, and the first rotor 82 is arranged on the third positioning plate; and the other side of the second rotary frame 7 is provided with a fourth positioning plate, and the second rotor 112 is arranged on the fourth positioning plate.

[0070] In some embodiments, the outer ring of the first rotary support 15 and / or the second rotary support 16 is provided with external teeth 161, and the second driving device comprises a gear and a driving unit, the gear is engaged with the external teeth 161, and the driving unit is used to drive the gear to rotate.

[0071] The second driving device drives the first rotary support 15 and / or the second rotary support 16 to rotate through the transmission between the gear and the external teeth 161.

[0072] In some embodiments, the scanning inspection device further comprises a second slip ring connected between the first cable 121 and the power supply, and the rotation axis of the second slip ring is collinear with the rotation axis of the first rotary frame 1.

[0073] By setting the second slip ring, the first cable 121 can rotate relative to the power supply, preventing the first cable 121 from winding during the rotation of the first rotating frame 1.

[0074] The power supply can be a power supply device arranged on the ground, or a city power socket.

[0075] In some embodiments, the scanning inspection device can further include a power supply battery mounted on the first rotating frame 1, so that the first cable 121 remains relatively fixed with the power supply battery, and the second slip ring can be omitted.

[0076] In some embodiments, the scanning inspection device further includes a detection device for detecting the rotation angle of the second rotating frame 7, and the second driving device is signal connected with the detection device to adjust the rotation angle of the second rotating frame 7 relative to the first rotating frame 1 according to the detection result of the detection device.

[0077] By setting the detection device, the rotation angle of the second rotating frame 7 can be detected in real time, and the second driving device controls the rotation angle of the second rotating frame 7 according to the detection result of the detection device, which is beneficial to keep the second rotating frame 7 relatively fixed relative to the ground, thereby keeping the posture of the cooling device fixed relative to the ground, preventing the cooling device from tilting or inverting during the revolution.

[0078] In some embodiments, the detection device includes an encoder. The structure of the encoder is simple, and the detection result is reliable.

[0079] In the above various embodiments, the first driving device and the second driving device can be a motor or other driving device. The second driving device can be mounted on the first rotating frame 1 for driving the second rotating frame 7 to rotate relative to the first rotating frame 1.

[0080] In some embodiments, the first rotating frame 1 is circular ring-shaped.

[0081] In some embodiments, the second rotating frame 7 is a square or rectangular shape, which is beneficial to ensure the stability of the cooling device.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: without departing from the principles of the present application, the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones, these modifications and equivalent replacements should be included in the technical solution range of the present application.

Claims

1. A scanning inspection device, characterized in that, include: The first rotating frame (1) has a conveying channel at its center for the inspection object (6) to pass through; A first driving device is driven to drive the first rotating frame (1) to rotate; The radiation source (2), detector (3), and cooling device for cooling the radiation source (2) are all mounted on the first rotating frame (1) and rotate with the first rotating frame (1); and The second drive device is configured to drive the cooling device to rotate in the opposite direction to the rotation direction of the first rotating frame (1), so that the cooling device maintains a fixed posture as it rotates with the first rotating frame (1). The rotation axis of the cooling device on the first rotating frame (1) is eccentrically set to the rotation axis of the first rotating frame (1).

2. The scanning inspection device according to claim 1, characterized in that, The cooling device is located outside the scanning range of the X-ray source (2).

3. The scanning inspection device according to claim 1, characterized in that, It also includes a second rotating frame (7), which is mounted on the first rotating frame (1), a cooling device is mounted on the second rotating frame (7), and a second driving device is driven to the second rotating frame (7) to drive the second rotating frame (7) to rotate relative to the first rotating frame (1).

4. The scanning inspection device according to claim 3, characterized in that, The cooling device includes a refrigeration device (4) and a first delivery pipe (9), the first delivery pipe (9) being connected to the refrigeration device (4) and used to deliver the heat exchange medium from the refrigeration device (4) to the radiation source (2) for cooling.

5. The scanning inspection apparatus according to claim 4, characterized in that, The cooling device further includes a second delivery pipe (10), which is connected between the outlet of the first delivery pipe (9) and the cooling device (4) to send the heat exchange medium after heat exchange on the radiation source (2) back to the cooling device (4).

6. The scanning inspection apparatus according to claim 4, characterized in that, It also includes a rotary joint (8), which includes a first stator (81) and a first rotor (82) rotatably connected to the first stator (81). The first stator (81) is connected to the first rotating frame (1), and the first rotor (82) is connected to the second rotating frame (7). The first conveying pipe (9) includes a first pipe section (91) and a second pipe section (92). The first pipe section (91) is connected between the refrigeration device (4) and the first stator (81), and the second pipe section (92) is connected to the first stator (81). The first pipe section (91) and the second pipe section (92) are fluidly connected through a first fluid channel between the first stator (81) and the first rotor (82).

7. The scanning inspection apparatus according to claim 5, characterized in that, It also includes a rotary joint (8), which includes a first stator (81) and a first rotor (82) rotatably connected to the first stator (81). The first stator (81) is connected to the first rotating frame (1), and the first rotor (82) is connected to the second rotating frame (7). The first conveying pipe (9) includes a first pipe section (91) and a second pipe section (92). The first pipe section (91) is connected between the refrigeration device (4) and the first stator (81), and the second pipe section (92) is connected to the first stator (81). The first pipe section (91) and the second pipe section (92) are connected to each other. (92) The second delivery pipe (10) is fluidly connected through a first fluid channel between the first stator (81) and the first rotor (82). The second delivery pipe (10) includes a third pipe section (101) and a fourth pipe section (102). The third pipe section (101) is connected between the outlet of the second pipe section (92) and the first rotor (82). The fourth pipe section (102) is connected between the first stator (81) and the refrigeration device (4). The third pipe section (101) and the fourth pipe section (102) are fluidly connected through a second fluid channel between the first stator (81) and the first rotor (82).

8. The scanning inspection apparatus according to claim 6 or 7, characterized in that, It also includes a first slip ring (11), a first cable (121), and a second cable (122). The first slip ring (11) includes a second stator (111) and a second rotor (112) rotatably connected to the second stator (111). The second stator (111) is connected to the first rotating frame (1), and the second rotor (112) is connected to the second rotating frame (7). The first cable (121) is connected between the power supply and the second stator (111), and the second cable (122) is connected between the second rotor (112) and the electrical socket of the refrigeration device (4). The first cable (121) and the second cable (122) are electrically connected through an electrical connection circuit between the second stator (111) and the second rotor (112). The rotation axis of the rotary joint (8), the rotation axis of the first slip ring (11), and the rotation axis of the second rotating frame (7) relative to the first rotating frame (1) are collinear.

9. The scanning inspection apparatus according to claim 8, characterized in that, The first rotating frame (1) includes a first support plate (1a) and a second support plate (1b) connected to the first support plate (1a). There is a preset distance between the first support plate (1a) and the second support plate (1b). The second rotating frame (7) is disposed between the first support plate (1a) and the second support plate (1b). The rotating joint (8) is disposed between the second rotating frame (7) and the second support plate (1b). The first slip ring (11) is disposed between the second rotating frame (7) and the first support plate (1a).

10. The scanning inspection apparatus according to claim 9, characterized in that, It also includes a first support body (13), a second support body (14), a first slewing support (15) and a second slewing support (16). The first support body (13) is connected to the first support plate (1a). The first slewing support (15) is supported on the first support body (13) and connected to the second rotating frame (7). The second support body (14) is connected to the second support plate (1b). The second slewing support (16) is supported on the second support body (14) and connected to the second rotating frame (7).

11. The scanning inspection apparatus according to claim 10, characterized in that, The first support (13) includes a first hollow cylinder, and the second stator (111) is installed in the first hollow cylinder; and / or, the second support (14) includes a second hollow cylinder, and the first stator (81) is installed in the second hollow cylinder.

12. The scanning inspection apparatus according to claim 10, characterized in that, The outer ring of the first slewing support (15) and / or the second slewing support (16) is provided with external teeth (161). The second driving device includes a gear and a driving unit. The gear meshes with the external teeth (161), and the driving unit is used to drive the gear to rotate.

13. The scanning inspection apparatus according to claim 8, characterized in that, It also includes a second slip ring, which is connected between the first cable (121) and the power supply, and the rotation axis of the second slip ring is collinear with the rotation axis of the first rotating frame (1).

14. The scanning inspection apparatus according to claim 3, characterized in that, It also includes a detection device for detecting the rotation angle of the second rotating frame (7), and the second drive device is signal-connected to the detection device to adjust the rotation angle of the second rotating frame (7) relative to the first rotating frame (1) according to the detection result of the detection device.

15. The scanning inspection apparatus according to claim 14, characterized in that, The detection device includes an encoder.

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