Scanning support for scanning composite material gas cylinder

Abstract

The invention relates to the technical field of engineering detection equipment, and discloses a scanning support for scanning a composite gas cylinder, which comprises a base, a support frame and a rotating mechanism, and is characterized in that the support frame and the rotating mechanism are arranged on the base at an interval along the front-back direction; the supporting frame comprises a bottom plate and a supporting plate, the supporting plate is provided with a supporting surface, and the supporting surface is in linear contact with the gas cylinder; the rotating mechanism comprises a fixed plate, a rotating motor, belt wheels and a friction belt, the rotating motor is fixedly connected with the fixed plate, the rotating motor is in transmission connection with the belt wheels, and the friction belt is wound between the belt wheels and used for supporting the gas cylinder to be detected and driving the gas cylinder to rotate in the front-back direction. The supporting face and the friction belt form a plurality of supporting points to support the gas cylinders at the same time, and the supporting face and the friction belt can be matched with the gas cylinders with different diameters. Meanwhile, the friction belt is a non-metal piece under the normal condition, artifacts cannot be generated after the friction belt makes contact with the gas cylinder, the supporting face of the supporting frame makes linear contact with the gas cylinder, the contact area of the supporting frame and the gas cylinder is reduced while the gas cylinder is supported, and scattering artifacts are reduced.

Description

Technical Field

[0001] This invention relates to the field of engineering testing equipment technology, and in particular to a scanning bracket for scanning composite gas cylinders. Background Technology

[0002] Industrial CT is short for industrial computed tomography. It can clearly, accurately, and intuitively display the internal structure, composition, material, and defects of the object being inspected in the form of two-dimensional tomographic images or three-dimensional stereoscopic images without damaging the object.

[0003] Composite material gas cylinders (such as carbon fiber wound hydrogen storage cylinders) have become an important development direction for new energy (such as hydrogen energy) storage and transportation equipment due to their lightweight and high strength characteristics. However, defects such as the quality of interlayer bonding, fiber distribution uniformity, and microcracks in composite materials directly affect the pressure-bearing performance and safety of the cylinders. Traditional detection methods (such as ultrasonic and visual inspection) are difficult to penetrate the multi-layer structure of composite materials and accurately locate internal defects, while CT technology can clearly show the fiber layer orientation, resin porosity, and delamination interfaces, providing key data support for process optimization and safety assessment. Therefore, CT scanning of composite material gas cylinders is a necessary step to ensure their reliability.

[0004] In existing technologies, gas cylinder fixing devices mostly rely on rigid clamps or manual adjustment mechanisms, which can only accommodate a single size. When inspecting gas cylinders of different specifications, frequent clamp changes or manual intervention are required, resulting in low efficiency and susceptibility to human error. In addition, traditional supports are mostly made of metal, and the contact point between the support and the gas cylinder is prone to scattering artifacts when X-rays penetrate, requiring complex algorithms for correction and increasing the data processing burden. Summary of the Invention

[0005] The purpose of this invention is to provide a scanning bracket for scanning composite gas cylinders, so as to solve the problems of limited bracket compatibility and easy generation of scattering artifacts in the prior art when detecting gas cylinders.

[0006] To achieve the above objectives, the present invention provides a scanning bracket for scanning composite gas cylinders, comprising a base, a support frame, and a rotating mechanism, wherein the support frame and the rotating mechanism are spaced apart from each other on the base in the front-rear direction; The support frame includes a base plate and a support plate connected to the base plate. The support plate has a support surface extending in the left-right direction. The support surface is used to support the gas cylinder to be tested in the height direction. The support surface is in contact with the gas cylinder line. The rotating mechanism includes a fixed plate, a rotary motor, pulleys, and a friction belt. The rotary motor is fixedly connected to the fixed plate and is driven by the pulleys. At least two pulleys are spaced apart along the left-right direction. The friction belt is wound between the pulleys and is used to support the gas cylinder to be tested and drive it to rotate around the front-back direction.

[0007] Optionally, the projection of the support surface along the front-rear direction is an elliptical surface.

[0008] Optionally, the support plate and the base plate are composite material parts, and the density of the composite material part is ρ, which satisfies: ρ < 2 g / cm³ 3 .

[0009] Optionally, there are two support plates, which are spaced apart along the front-rear direction, and both support plates are fixedly connected to the base plate.

[0010] Optionally, there are two rotating mechanisms, which are respectively located on the front and rear sides of the support frame.

[0011] Optionally, the scanning bracket further includes a lifting mechanism. The lifting mechanism is provided between the support frame and the base, and between the rotating mechanism and the base. The base plate and the fixing plate are respectively connected to the lifting mechanism for transmission. The lifting mechanism can drive the support frame and the rotating mechanism to move along the height direction.

[0012] Optionally, the lifting mechanism includes an assembly plate, a lifting motor, a gearbox, and a telescopic rod. The lifting motor is located on the assembly plate, and the gearbox is connected between the lifting motor and the telescopic rod. The base plate and the fixing plate are respectively fixedly connected to the telescopic rod.

[0013] Optionally, the scanning bracket further includes multiple moving mechanisms, each of which is disposed on the base. The moving mechanisms are connected to the assembly plate in a transmission manner, and the moving mechanisms can drive the assembly plate to move in the front-back direction.

[0014] Optionally, the moving mechanism includes a moving motor, a guide rail, a lead screw, a slider, and a nut. The moving motor and the guide rail are both fixedly mounted on the base. The guide rail and the lead screw extend along the front-back direction and are spaced apart along the left-right direction. The moving motor is drivenly connected to the lead screw. The nut is threadedly mounted on the lead screw. The slider is slidably mounted on the guide rail. The slider and the nut are both fixedly connected to the mounting plate.

[0015] Compared with existing technologies, the scanning bracket for scanning composite gas cylinders according to an embodiment of the present invention has the following advantages: A support plate with a support surface is provided on the support frame. The support plate and the friction belt of the rotating mechanism are spaced apart along the front-to-back direction. The support surface and the friction belt form multiple support points to simultaneously support the gas cylinder. The support surface and the gas cylinder are in line contact. Both the support surface and the friction belt support the gas cylinder only in the vertical direction, eliminating the need for clamping structures. Both the support surface and the friction belt can be matched with gas cylinders of different diameters. Simultaneously, the friction belt is typically a non-metallic component, so it does not produce artifacts after contacting the gas cylinder. The line contact between the support surface of the support frame and the gas cylinder reduces the contact area while supporting the gas cylinder, weakening the interference of external structures on imaging, reducing the absorption and scattering effects of X-rays, thereby reducing the generation of scattering artifacts. This significantly reduces the background noise of the scanned image, and qualitatively improves the contrast and recognition of defect features. Furthermore, the rotary motor drives the friction belt to rotate via a pulley. Under the action of friction, the friction belt can drive the gas cylinder to rotate around the front-to-back direction, completing the scanning work of the gas cylinder at different angles. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the scanning bracket for scanning composite gas cylinders according to the present invention; Figure 2 yes Figure 1 An enlarged schematic diagram of the structure at point A of the scanning bracket used for scanning composite gas cylinders; Figure 3 yes Figure 1 An enlarged schematic diagram of the structure at point B of the scanning bracket used for scanning composite gas cylinders; Figure 4 yes Figure 1 A schematic diagram of the lifting mechanism of the scanning bracket used for scanning composite gas cylinders.

[0017] In the diagram, 1. Base, 2. Support frame, 21. Base plate, 22. Support plate, 221. Support surface, 3. Rotating mechanism, 31. Fixed plate, 32. Rotary motor, 33. Pulley, 34. Friction belt, 35. Drive shaft, 4. Lifting mechanism, 41. Assembly plate, 42. Lifting motor, 43. Gearbox, 44. Telescopic rod, 5. Moving mechanism, 51. Moving motor, 52. Guide rail, 53. Lead screw, 54. Slider, 55. Nut. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] A preferred embodiment of the scanning holder for scanning composite gas cylinders according to the present invention, such as... Figures 1 to 4As shown, the scanning bracket for scanning composite material gas cylinders includes a base 1, a support frame 2, and a rotating mechanism 3. The base 1 serves as the supporting foundation for the scanning bracket. Both the support frame 2 and the rotating mechanism 3 are mounted on the base 1. The support frame 2 supports the gas cylinder to be tested along the height direction, and the rotating mechanism 3 supports the gas cylinder and drives it to rotate in the front-back direction. In this embodiment, the base 1 is specifically a plate structure. In other embodiments, the base 1 can also be configured as a frame structure, etc., as needed.

[0020] The support frame 2 includes a base plate 21 and a support plate 22. The base plate 21 and the support plate 22 are perpendicular to each other and fixedly connected. The support plate 22 has a support surface 221 on the side opposite to the base plate 21 along the height direction. The support surface 221 extends in the left-right direction and is used to support the gas cylinder to be tested. The support surface 221 is in line contact with the gas cylinder. Typically, the gas cylinder is cylindrical. In this case, the support surface 221 can be flat or curved. The line contact between the support surface 221 and the gas cylinder reduces the contact area with the gas cylinder, weakens the interference of external structures on imaging, and ensures that the scanning results accurately reflect the internal state of the gas cylinder to be tested. In addition, the support frame 2 supports the gas cylinder to be tested along the height direction through the support surface 221 of the support plate 22, and the line contact between the support surface 221 and the gas cylinder to be tested allows the support surface 221 to be adapted to gas cylinders of different sizes.

[0021] The rotating mechanism 3 includes a fixed plate 31, a rotary motor 32, a pulley 33, and a friction belt 34. The rotary motor 32, pulley 33, and friction belt 34 are all mounted on the fixed plate 31. The rotary motor 32 and the pulley 33 are connected via a drive shaft 35, with the pulley 33 fixedly mounted on the drive shaft 35. In this embodiment, there are two rotary motors 32 and two pulleys 33, with each rotary motor 32 connected to one pulley 33 via the drive shaft 35. The friction belt 34 is wound between two pulleys 33, and the inner wall of the friction belt 34 engages with the outer surface of the pulley 33 through toothed meshing.

[0022] The rotary motor 32 outputs power to the drive shaft 35. When the drive shaft 35 drives the pulley 33 to rotate, the pulley 33 drives the friction belt 34 to rotate through the teeth. The outer wall of the belt supports the gas cylinder to be tested and contacts the outer surface of the gas cylinder to be tested. When the belt rotates, the friction force causes the gas cylinder to rotate at different angles in the front and back directions. While ensuring the dynamic stability of the gas cylinder to be tested during rotation, it can meet the requirement of consistent rotation speed for gas cylinders of different diameters.

[0023] In this embodiment, the scanning bracket also includes a PLC control system, which is electrically connected to the rotary motor 32. The rotation speed of the rotary motor 32 can be adjusted through the PLC control system, thereby adjusting the rotation speed of the gas cylinder to be tested.

[0024] The scanning bracket for scanning composite gas cylinders has a support plate 22 with a support surface 221 on its support frame 2. The support plate 22 and the friction strip 34 of the rotating mechanism 3 are spaced apart in the front-to-back direction. The support surface 221 and the friction strip 34 form multiple support points to support the gas cylinders simultaneously. The support surface 221 and the gas cylinders are in line contact. Both the support surface 221 and the friction strip 34 support the gas cylinders only in the vertical direction, eliminating the need for clamping structures. Both the support surface 221 and the friction strip 34 can be matched with gas cylinders of different diameters. At the same time, the friction strip 34 is usually a non-metallic part and does not become metallic after contacting the gas cylinder. This will produce artifacts. The support surface 221 of the support frame 2 is in line contact with the gas cylinder. While supporting the gas cylinder, it reduces the contact area with the gas cylinder, weakens the interference of external structures on imaging, and reduces the absorption and scattering effects of X-rays, thereby reducing the generation of scattering artifacts. This significantly reduces the background noise of the scanned image and qualitatively improves the contrast and recognition of defect features. In addition, the rotary motor 32 can drive the friction belt 34 to rotate through the pulley 33. Under the action of friction, the friction belt 34 can drive the gas cylinder to rotate in the front and back direction, completing the scanning work of the gas cylinder at different angles.

[0025] Optionally, the projection of the support surface 221 along the front-back direction is an elliptical surface.

[0026] The elliptical surface has a gradually changing curvature, making it universally applicable to existing gas cylinders with diameters of 500-800mm, providing sufficient support while allowing the cylinders to rotate freely. In other embodiments, the support surface 221 can also be a plane, with baffles at both ends of the support plate 22 in the left and right directions to limit the left and right movement of the gas cylinder under test and prevent it from detaching from the support plate 22.

[0027] Optionally, the support plate 22 and the base plate 21 are composite material parts, and the density of the composite material parts is ρ, which satisfies: ρ < 2 g / cm³ 3 .

[0028] Sealing less than 2 g / cm 3 The material has the characteristic of low absorption rate. The support surface 221 is the only interface on the support frame 2 that supports and contacts the gas cylinder to be tested. It uses a density of less than 2 g / cm³. 3 The composite material composition can further reduce X-ray artifacts, directly improve the signal-to-noise ratio of CT images, and enhance the contrast and recognizability of defect features.

[0029] Optionally, there are two support plates 22, which are spaced apart in the front-to-back direction, and both support plates 22 are fixedly connected to the base plate 21.

[0030] Two support plates 22 are spaced apart along the front-to-back direction. The two support plates 22 can increase the support points of the gas cylinder under test and improve the stability of the gas cylinder under test during the scanning process.

[0031] Optionally, there are two rotating mechanisms 3, which are respectively located on the front and rear sides of the support frame 2.

[0032] Two rotating mechanisms 3 are arranged on the front and rear sides of the support frame 2. The two rotating mechanisms 3 drive the gas cylinder under test to rotate, so that the front and rear ends of the gas cylinder under test rotate synchronously. This ensures that the central axis of the gas cylinder under test is always along the front-back direction during the scanning process, reducing the verticality deviation of the gas cylinder and avoiding image layer misalignment caused by the gas cylinder under test being tilted. In this embodiment, the two rotating mechanisms 3 have the same structure, and the rotating motors 32 of the two rotating mechanisms 3 are respectively connected to the PLC control system. The PLC control system ensures that the rotating motors 32 of the two rotating mechanisms in the front-back direction work synchronously.

[0033] Optionally, the scanning bracket also includes a lifting mechanism 4. The lifting mechanism 4 is provided between the support frame 2 and the base 1, and between the rotating mechanism 3 and the base 1. The base plate 21 and the fixed plate 31 are respectively connected to the lifting mechanism 4 for transmission. The lifting mechanism 4 can drive the support frame 2 and the rotating mechanism 3 to move along the height direction.

[0034] Lifting mechanisms 4 are respectively set between the support frame 2 and the base 1, and between the rotating mechanism 3 and the base 1. After the lifting mechanism 4 is connected to the base plate 21 and the fixed plate 31 respectively, it can drive the support frame 2 and the rotating mechanism 3 to move along the height direction, thereby driving the gas cylinder to be tested to move along the height direction, adjusting the height of the gas cylinder to be tested, and facilitating automated detection.

[0035] In this embodiment, two sets of lifting mechanisms 4 are connected between the base plate 21 and the base 1, and the two sets of lifting mechanisms 4 are spaced apart in the left-right direction; two sets of lifting mechanisms 4 are also connected between the fixed plate 31 and the base 1, and the two sets of lifting mechanisms 4 are spaced apart in the left-right direction. The two sets of lifting mechanisms 4 drive the support frame 2 and the rotating mechanism 3 to rise and fall, which can ensure that the left and right ends of the support frame 2 and the rotating mechanism 3 rise and fall synchronously, avoid the support frame 2 and the lifting mechanism 4 from swaying during the rise and fall, significantly improve the system's anti-tipping ability when scanning large-size gas cylinders, and thus increase the fact that the axis of the gas cylinder under test is always perpendicular to the scanning plane of the CT scan during the rise and fall process.

[0036] Optionally, the lifting mechanism 4 includes an assembly plate 41, a lifting motor 42, a gearbox 43, and a telescopic rod 44. The lifting motor 42 is located on the assembly plate 41, and the gearbox 43 is connected between the lifting motor 42 and the telescopic rod 44. The base plate 21 and the fixing plate 31 are respectively fixedly connected to the telescopic rod 44.

[0037] The mounting plate 41 of the lifting mechanism 4 is connected to the base 1. The lifting motor 42, gearbox 43, and telescopic rod 44 are all arranged on the mounting plate 41. The lifting motor 42 is connected to the telescopic rod 44 through the gearbox 43. The gearbox 43 can adjust the output speed of the lifting motor 42, driving the telescopic rod 44 to move. When the telescopic rod 44 extends or retracts, it can drive the support frame 2 and the rotating mechanism 3 to rise or fall. In this embodiment, the lifting motor 42 is electrically connected to the PLC control system. The PLC control system can control each lifting motor 42 to work synchronously, thereby driving each telescopic rod 44 to rise and fall synchronously, reducing the synchronization error of the lifting mechanism 4 and reducing the distortion of the scanned image from the root.

[0038] Optionally, the scanning bracket also includes multiple moving mechanisms 5, each of which is located on the base 1. The moving mechanisms 5 are connected to the assembly plate 41 in a transmission manner, and the moving mechanisms 5 can drive the assembly plate 41 to move in the front-back direction.

[0039] A moving mechanism 5 is set on the base 1. The moving mechanism 5 can drive the assembly plate 41 to move in the front-back direction, so as to drive the lifting mechanism 4 to move in the front-back direction. At the same time, the lifting mechanism 4 can drive the gas cylinder to be tested to move synchronously in the front-back direction, which can cover the full-size scanning needs of gas cylinders of different lengths.

[0040] In this embodiment, each moving mechanism 5 is electrically connected to the PLC control system. The PLC control system adjusts the synchronous movement of each moving mechanism 5 through a dynamic compensation algorithm, thereby achieving precise positioning of the gas cylinder under test along the front-back direction with a positioning accuracy of ±0.1mm.

[0041] Optionally, the moving mechanism 5 includes a moving motor 51, a guide rail 52, a lead screw 53, a slider 54, and a nut 55. The moving motor 51 and the guide rail 52 are both fixedly mounted on the base 1. The guide rail 52 and the lead screw 53 extend in the front-back direction and are spaced apart in the left-right direction. The moving motor 51 and the lead screw 53 are connected in a transmission manner. The nut 55 is threadedly mounted on the lead screw 53. The slider 54 is slidably mounted on the guide rail 52. The slider 54 and the nut 55 are both fixedly connected to the mounting plate 41.

[0042] The assembly plate 41 is slidably mounted on the guide rail 52 via the slider 54. The moving motor 51 is connected to the lead screw 53 for transmission. The moving motor 51 drives the lead screw 53 to rotate. Under the action of the threaded structure, the nut 55 moves on the lead screw 53 in the front-back direction, thereby driving the slider 54 and the assembly plate 41 to slide on the guide rail 52 in the front-back direction, so as to realize the adjustment of the front-back position of the support frame 2, the lifting mechanism 4, and the rotating mechanism 3.

[0043] In this embodiment, the moving motor 51 is a servo motor, which can provide real-time feedback on movement accuracy. Two parallel lead screws 53 are connected to one moving motor 51 that drives the rotating mechanism 3 in the front-to-back direction, forming a double lead screw 53 transmission mechanism. One lead screw 53 is connected to one moving motor 51 that drives the support frame 2 in the front-to-back direction. Four guide rails 52 are spaced apart in the left-to-right direction. The slider 54 that drives the support frame 2 to move back and forth shares the two middle guide rails 52 with the slider 54 that drives the rotating mechanism 3 to move back and forth, reducing the number of guide rails 52. The guide rail 52 has a movement range of 5000mm, achieving precise positioning of the gas cylinder in the horizontal direction with a stroke of 5000mm and a positioning accuracy of ±0.1mm, which can cover the full-size scanning requirements of ultra-long gas cylinders. Furthermore, the rotating mechanism 3 and the support frame 2 are respectively fixed to independent guide rails 52 and sliders 54, achieving physical isolation between the rotation drive and support functions, reducing mutual vibration interference.

[0044] The working process of this invention is as follows: When using this scanning bracket, the gas cylinder is first loaded and adaptively adjusted, placing it horizontally on the support surface 221 of the support frame 2. Then, the rotating mechanism 3 adjusts its position according to the gas cylinder height (500-2200mm), ensuring the friction strip 34 forms a uniform covering contact with the outer wall of the gas cylinder, guaranteeing transmission efficiency while preventing overpressure damage to the gas cylinder's composite material surface. After the rotating mechanism 3 is properly adapted, the lifting mechanism 4 is activated. The lifting motor 42 drives the four telescopic rods 44 to lift synchronously via the gearbox 43. The PLC control system monitors the displacement of each telescopic rod 44 in real time and dynamically compensates for deviations (synchronization error <0.5mm), raising the gas cylinder to the preset height. The rigid guide of the telescopic rods 44 ensures that the gas cylinder axis is perpendicular to the CT scanning plane.

[0045] Each moving mechanism 5 begins to work in concert: the moving motor 51 drives the lead screw 53 to rotate, which in turn moves the nut 55, driving the slider 54 to translate axially along the guide rail 52, so that the support frame 2 and the lifting mechanism 4 move synchronously to the scanning start position, with a maximum stroke of 5000mm covering the full length of the inspection requirements of ultra-long gas cylinders. After entering the scanning stage, the rotary motor 32 drives the friction belt 34 to rotate, using friction to drive the gas cylinder to achieve continuous rotation. At the same time, the lead screw 53 drives the nut 55 to feed axially at a preset speed. The central controller dynamically matches the phase relationship between rotation and translation through a PID algorithm to achieve precise synchronization of the spiral scanning trajectory and eliminate motion artifacts of traditional step scanning. Throughout the process, the support frame 2 made of low-absorption composite material and the low-interference rotating mechanism 3 significantly reduce X-ray scattering and absorption. Combined with closed-loop control of multi-degree-of-freedom motion, efficient, non-destructive, and fully automated CT inspection of gas cylinders of various sizes is finally achieved.

[0046] In summary, this invention provides a scanning bracket for scanning composite material gas cylinders. The bracket has a support plate with a support surface. The support plate and the friction belt of the rotating mechanism are spaced apart along the front-to-back direction. The support surface and the friction belt form multiple support points simultaneously supporting the gas cylinder. The support surface and the gas cylinder are in line contact. Both the support surface and the friction belt support the gas cylinder only in the vertical direction, eliminating the need for clamping structures. Both the support surface and the friction belt can be matched with gas cylinders of different diameters. Furthermore, the friction belt is typically a non-metallic component, so it does not produce artifacts after contacting the gas cylinder. The support surface of the bracket is in line contact with the gas cylinder, reducing the contact area while supporting the cylinder, weakening the interference of external structures on imaging, and reducing the absorption and scattering effects of X-rays, thereby reducing the generation of scattering artifacts. This significantly reduces the background noise of the scanned image and qualitatively improves the contrast and recognizability of defect features. In addition, the rotary motor drives the friction belt to rotate via a pulley. Under the action of friction, the friction belt can drive the gas cylinder to rotate around the front-to-back direction, completing the scanning of the gas cylinder at different angles.

[0047] Meanwhile, the scanning support used for scanning composite gas cylinders significantly improves the clarity of CT imaging and the controllability of the inspection process through the organic combination of innovative material applications and intelligent motion control. Key structural components of the support are manufactured using high-performance composite materials, which significantly reduces X-ray absorption and scattering effects while ensuring load-bearing strength. This results in a significant reduction in background noise in the scanned images, and a qualitative improvement in the contrast and recognizability of defect features. The optimized design of the rotation mechanism and support frame effectively reduces the contact area between the gas cylinder and the support frame, further weakening the interference of external structures on imaging and ensuring that the scan results accurately reflect the internal state of the gas cylinder. The multi-degree-of-freedom motion system, through intelligent coordination with the central controller, achieves precise coordination between gas cylinder rotation and axial feed, not only eliminating motion artifacts generated by traditional step-scanning but also supporting dynamic adjustment of complex trajectories. This closed-loop control mechanism can sense changes in gas cylinder posture in real time and automatically compensate for displacement deviations, ensuring the stability of the scanning process and the consistency of data acquisition. Furthermore, the fully automated operation mode simplifies the inspection process; operators only need to set basic parameters to complete a full-size scan, significantly reducing the risk of human error and providing more reliable technical support for the quality assessment of composite gas cylinders.

[0048] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A scanning bracket for scanning composite gas cylinders, characterized in that, It includes a base (1), a support frame (2) and a rotating mechanism (3), wherein the support frame (2) and the rotating mechanism (3) are spaced apart from each other on the base (1) in the front-back direction; The support frame (2) includes a base plate (21) and a support plate (22) connected to the base plate (21). The support plate (22) has a support surface (221) extending in the left-right direction. The support surface (221) is used to support the gas cylinder to be tested in the height direction. The support surface (221) is in contact with the gas cylinder line. The rotating mechanism (3) includes a fixed plate (31), a rotary motor (32), pulleys (33) and a friction belt (34). The rotary motor (32) is fixedly connected to the fixed plate (31) and is drivenly connected to the pulleys (33). At least two pulleys (33) are spaced apart along the left-right direction. The friction belt (34) is wound between each of the pulleys (33) and is used to support the gas cylinder to be tested and drive it to rotate around the front-back direction.

2. The scanning bracket for scanning composite gas cylinders according to claim 1, characterized in that, The projection of the support surface (221) along the front-back direction is an elliptical surface.

3. The scanning bracket for scanning composite gas cylinders according to claim 1, characterized in that, The support plate (22) and the base plate (21) are composite material parts with a density of ρ, satisfying: ρ < 2 g / cm³. 3 .

4. The scanning bracket for scanning composite gas cylinders according to claim 1, characterized in that, There are two support plates (22), which are spaced apart along the front-back direction, and both support plates (22) are fixedly connected to the base plate (21).

5. The scanning holder for scanning composite gas cylinders according to any one of claims 1-4, characterized in that, There are two rotating mechanisms (3), which are respectively located on the front and rear sides of the support frame (2).

6. The scanning holder for scanning composite gas cylinders according to any one of claims 1-4, characterized in that, The scanning bracket also includes a lifting mechanism (4). The lifting mechanism (4) is provided between the support frame (2) and the base (1) and between the rotating mechanism (3) and the base (1). The base plate (21) and the fixing plate (31) are respectively connected to the lifting mechanism (4) for transmission. The lifting mechanism (4) can drive the support frame (2) and the rotating mechanism (3) to move along the height direction.

7. The scanning bracket for scanning composite gas cylinders according to claim 6, characterized in that, The lifting mechanism (4) includes an assembly plate (41), a lifting motor (42), a gearbox (43), and a telescopic rod (44). The lifting motor (42) is located on the assembly plate (41). The gearbox (43) is connected to the lifting motor (42) and the telescopic rod (44). The base plate (21) and the fixing plate (31) are respectively fixedly connected to the telescopic rod (44).

8. The scanning bracket for scanning composite gas cylinders according to claim 7, characterized in that, The scanning bracket also includes multiple moving mechanisms (5), each of which is located on the base (1). The moving mechanism (5) is connected to the assembly plate (41) in a transmission manner, and the moving mechanism (5) can drive the assembly plate (41) to move in the front-back direction.

9. The scanning bracket for scanning composite gas cylinders according to claim 8, characterized in that, The moving mechanism (5) includes a moving motor (51), a guide rail (52), a lead screw (53), a slider (54), and a nut (55). The moving motor (51) and the guide rail (52) are both fixedly assembled on the base (1). The guide rail (52) and the lead screw (53) extend along the front-back direction and are spaced apart along the left-right direction. The moving motor (51) is connected to the lead screw (53) in a transmission connection. The nut (55) is threadedly assembled on the lead screw (53). The slider (54) is slidably assembled on the guide rail (52). The slider (54) and the nut (55) are both fixedly connected to the assembly plate (41).

Images