A large-caliber CT scanning device

Abstract

This application discloses a large-aperture CT scanner, relating to the field of CT scanning technology. The device comprises a support frame, a fixed support frame, and a rotating support frame. The fixed support frame is mounted on the support frame, and the rotating support frame is rotatably disposed within the fixed support frame. A scanning aperture is formed within the rotating support frame, and a rotating frame is disposed on the rotating support frame. The rotating frame comprises a connecting plate, an upper plate, a lower plate, and two side plates. This application utilizes a rotating frame with a trapezoidal structure to reduce the distance from the X-ray tube, cooling system, high-voltage box, and control chassis to the center of the scanning aperture, thereby reducing the centrifugal force on the components and improving the operational stability of the large-aperture CT scanner.

Description

Technical Field

[0001] The present application relates to the field of CT scanning technology, and in particular to a large-aperture CT scanning device. Background Art

[0002] CT is a medical device that uses X-rays and a synchronously rotating detector to perform cross-sectional imaging of the human body. Its core components include an X-ray tube, a detector array, a rotating gantry, and a data processing system. Computer-generated high-resolution cross-sectional or three-dimensional images are reconstructed. CT is widely used in disease diagnosis, trauma assessment, and tumor detection.

[0003] Currently, a CT scanner consists of a support frame, a fixed frame, and a rotating frame. The fixed frame is mounted on the support frame, and the rotating frame is rotatably mounted within the fixed frame via bearings. The fixed frame is equipped with a drive mechanism that drives the rotating frame to rotate. Components such as the X-ray tube, detector, cooling system, high-voltage box, control chassis, and counterweights are all mounted on the circular rotating frame. Multiple components are installed at intervals along the circumference of the rotating frame so that the center of gravity of the rotating frame is located at the center of the rotating frame. A scanning aperture is formed within the rotating frame, typically with a diameter ranging from 500 to 700 mm. After the scanning bed inserts the patient into the scanning aperture, the drive mechanism rotates the multiple components via the rotating frame, thereby performing a CT scan.

[0004] When performing CT scans on obese patients, the conventional caliber scanning aperture may cause the patient's body to exceed the scanning field of view, affecting the integrity of the imaging, or even making it impossible for the patient to enter the scanning aperture. Therefore, obese patients need to be scanned using a large-caliber CT scanning device. When the inner diameter of the scanning aperture increases, in order to adapt to the installation of various components, the outer diameter of the rotating bracket will inevitably increase, thereby increasing the distance from each component to the center of the scanning aperture, which increases the centrifugal force on the components during rotation. Excessive centrifugal force will intensify the vibration of the components caused by the offset of the center of gravity, thereby reducing the stability of the CT scanning device. Summary of the Invention

[0005] In order to improve the operational stability of a large-aperture CT scanning device, the present application provides a large-aperture CT scanning device.

[0006] The present application provides a large-aperture CT scanning device that adopts the following technical solutions:

[0007] A large-caliber CT scanning device includes a support frame, a fixed support frame and a rotating support frame, wherein the fixed support frame is mounted on the support frame, the rotating support frame is rotatably arranged in the fixed support frame, a scanning hole is formed in the rotating support frame, and the aperture of the scanning hole is 800-850mm, a driving mechanism for driving the rotating support frame to rotate is provided in the fixed support frame, a rotating frame is fixedly provided on the rotating support frame, and the rotating frame includes a connecting plate, an upper plate, a lower plate and two side plates, the connecting plate is fixedly provided on the side wall of the rotating support frame, the upper plate is fixedly provided on the connecting plate, and the upper plate is away from the scanning hole. An X-ray tube is provided on one side, a front collimator is provided on the side of the upper plate close to the scanning hole, the lower plate is parallel to the upper plate and fixedly provided on the connecting plate, a counterweight is provided on the lower plate, the upper plate and the lower plate are respectively located on both sides of the diameter direction of the scanning hole, the length of the lower plate is greater than the length of the upper plate, a detector is provided on the connecting plate on the side of the scanning hole close to the lower plate, the two side plates are fixedly provided on the connecting plate and are located on both sides of the scanning hole, the two ends of the side plates are fixedly connected to the same side of the upper plate and the lower plate, and a cooling system, a high-voltage box and a control chassis are provided on the side walls of the two side plates away from the scanning hole.

[0008] By adopting this technical solution, the scanning aperture is 800-850mm in diameter, making it easier to perform CT scans on obese patients. The drive mechanism rotates the rotating bracket, which in turn drives the various components through the rotating frame, thereby performing CT scans on patients. The rotating frame has a trapezoidal structure, which reduces the distance between the X-ray tube, cooling system, high-voltage box, and control cabinet and the center of the scanning aperture, reducing the centrifugal force on the components and improving the operational stability of the large-aperture CT scanner.

[0009] Preferably, the two side plates are both arranged along the tangent direction of the scanning hole.

[0010] By adopting the above technical solution, the two side plates are arranged along the tangent direction of the scanning hole, so that the distance between the side plates, the upper plate and the lower plate and the center of the scanning hole is smaller, which can further reduce the distance between each component and the center of the scanning hole, thereby further reducing the centrifugal force on the components.

[0011] Preferably, the lower plate includes a first plate body and two second plate bodies, the first plate body and the two second plate bodies are fixedly connected to the connecting plate, the first plate body is parallel to the upper plate, the two second plate bodies are fixedly arranged at both ends of the length direction of the first plate body, the two second plate bodies are inclined toward the direction close to the upper plate, and the ends of the two second plate bodies away from the first plate body are respectively fixedly connected to the ends of the two side plates away from the upper plate.

[0012] By adopting the above technical solution, the second plate is tilted toward the upper plate, which facilitates the installation of the detector. At the same time, it also reduces the distance from both sides of the lower plate to the scanning hole circle, reducing the centrifugal force on the rotating frame when it rotates.

[0013] Preferably, the driving mechanism includes a driving member, a driving wheel and a driving belt, the driving member is fixedly arranged on a fixed bracket, the driving wheel is arranged at the driving end of the driving member, the driving belt is sleeved on the driving wheel and the rotating bracket, and the fixed bracket is provided with a tensioning mechanism for tensioning the driving belt.

[0014] By adopting the above technical solution, the tensioning mechanism tensions the driving belt, the driving member drives the driving wheel to rotate, and the driving wheel drives the rotating bracket to rotate through the driving belt, thereby driving various components on the rotating frame to rotate.

[0015] Preferably, the tensioning mechanism includes a tensioner, a first tensioning wheel and two second tensioning wheels, the tensioner is fixedly set on a fixed bracket, the first tensioning wheel is rotatably set at the driving end of the tensioner, the two second tensioning wheels are both rotatably mounted on the fixed bracket and are located at the upper and lower ends of the drive belt, and the first tensioning wheel and the second tensioning wheel both abut the outer wall of the drive belt.

[0016] By adopting the above technical solution, the tensioner drives the first tensioning wheel to move toward the direction close to the drive belt, and the first tensioning wheel and the two second tensioning wheels tension the drive belt, making the drive belt less likely to slip, thereby improving the driving effect of the drive mechanism.

[0017] Preferably, a ray port is formed in the upper plate, and the upper plate is located above the ray port and is detachably fixedly provided with a first mounting plate and a second mounting plate stacked thereon, the second mounting plate being located above the first mounting plate, and the X-ray tube is detachably fixedly provided on the second mounting plate through a support, and pull plates are provided on adjacent side walls of the upper plate, and a tensioning member is provided in the pull plate, and the two tensioning members are respectively connected to the first mounting plate and the second mounting plate, and the upper plate is located below the ray port and is detachably fixedly provided with a mounting frame, and the front collimator is detachably fixedly provided in the mounting frame.

[0018] By adopting the above technical solution, the rays emitted by the X-ray tube are projected onto the front collimator through the ray port, and the first mounting plate and the second mounting plate are tightened and reinforced using two tensioning members and two pulling plates, and the first mounting plate and the second mounting plate are firmly mounted on the upper plate, so that the X-ray tube is installed more firmly. At the same time, the front collimator is installed on the upper plate through the mounting frame, so that the front collimator is installed more firmly.

[0019] Preferably, the upper plate is located on the inner side wall of the ray port and is fixed with a reinforcement block, a limit rod is slidably passed through the mounting frame, a limit block is provided at the bottom end of the limit rod, the limit block abuts the bottom wall of the mounting frame, and a connecting block is fixed on the side wall of the bracket, the limit rod slides through the reinforcement block, the first mounting plate, the second mounting plate and the connecting block, a limit pin is slidably provided in the connecting block, a limit slot is provided on the top of the limit rod, the limit pin passes through the limit slot and limits the limit rod.

[0020] By adopting the above technical solution, the limiting rod is inserted into the mounting frame and slid so that it slides sequentially through the reinforcement block, the first mounting plate, the second mounting plate, and the connecting block. The limiting pin in the connecting block is then inserted into the limiting groove of the limiting rod to secure the limiting rod. The limiting rod limits the mounting frame, the reinforcement block, the first mounting plate, the second mounting plate, and the support, thereby ensuring a more secure installation of the mounting frame and the X-ray tube.

[0021] Preferably, a first slide groove and a second slide groove are respectively provided on both sides of the limit rod in the connecting block, the depth of the second slide groove is greater than the depth of the first slide groove, the limit pin is slidably arranged in the first slide groove, the limit groove and the second slide groove, the middle part of the top wall of the limit pin is provided with a second limit ridge, and the first limit ridge and the third limit ridge are provided at both ends of the bottom wall of the limit pin. When the limit pin passes through the limit groove, the first limit ridge is pressed against the bottom wall of the first slide groove, the second limit ridge is pressed against the top wall of the limit groove, and the third limit ridge is pressed against the bottom wall of the second slide groove.

[0022] By adopting the above technical solution, after the limit pin passes through the limit groove, the limit pin presses against the first slide groove, the limit groove and the second slide groove through the first limit ridge, the second limit ridge and the third limit ridge, so that the limit rod is fixed more firmly by the limit pin.

[0023] Preferably, a moving rod is rotatably provided on the side wall of the connecting block, and the moving rod is slidably provided in the connecting block along the sliding direction of the vertical limit pin, and a locking block is provided at one end of the moving rod close to the limit pin, and an elastic member is provided on the connecting block for driving the moving rod to move in the direction away from the limit pin, an inlet groove is provided on the side wall of the limit pin, and a rotating groove connected to the inlet groove is provided in the limit pin, and a locking groove is provided on the side wall of the rotating groove close to the moving rod, the locking block is slidably provided in the inlet groove, and the locking block is rotatably provided in the rotating groove, and the elastic member drives the locking block to be clamped in the locking groove through the moving rod.

[0024] By adopting the above technical solution, after the limit pin passes through the limit slot, the moving rod is pushed toward the limit pin, and the moving rod drives the locking block to enter the inlet slot. Then the moving rod is rotated, and the moving rod drives the locking block to rotate in the rotating slot. Finally, the moving rod is released, and the elastic part drives the locking block to be engaged in the locking slot through the moving rod, thereby fixing the limit pin so that the limit pin will not slip out of the limit slot.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The use of a rotating frame with a trapezoidal structure reduces the distance between the X-ray tube, cooling system, high-voltage box, and control cabinet and the center of the scanning aperture, reducing the centrifugal force on the components and thus improving the operational stability of the large-aperture CT scanner;

[0027] 2. With the side plates installed along the tangent direction of the scanning hole, the distance between the side plates, upper plate and lower plate and the center of the scanning hole is made smaller, which can further reduce the distance between each component and the center of the scanning hole, thereby further reducing the centrifugal force on the components;

[0028] 3. By using two tensioning members and two pulling plates to tighten and reinforce the first mounting plate and firmly install the first mounting plate and the second mounting plate on the upper plate, the X-ray tube is installed more firmly. At the same time, the front collimator is installed on the upper plate through the mounting bracket, so that the front collimator is installed more firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of the large-aperture CT scanning device in Example 1 of the present application;

[0030] Figure 2 This is a partial structural diagram of the large-aperture CT scanning device in Example 1 of the present application, highlighting the driving mechanism;

[0031] Figure 3 This is a partial structural front view of the large-aperture CT scanning device in Example 1 of the present application, highlighting the rotating frame;

[0032] Figure 4 This is an exploded view of part of the structure of the large-aperture CT scanning device in Example 1 of the present application;

[0033] Figure 5 This is a partial structural diagram of the large-aperture CT scanning device in Example 2 of the present application;

[0034] Figure 6 This is a partial structural cross-sectional view of the large-aperture CT scanning device in Example 2 of the present application;

[0035] Figure 7This is a partial structural cross-sectional view of the large-aperture CT scanning device in Example 2 of the present application, highlighting the limit pin;

[0036] Figure 8 This is a partial structural cross-sectional view of the large-aperture CT scanning device in Example 2 of the present application, highlighting the moving rod;

[0037] Figure 9 This is an exploded cross-sectional view of part of the structure of the large-aperture CT scanning device in Example 2 of the present application, highlighting the lock slot.

[0038] Figure numerals: 1, support frame; 2, fixed bracket; 3, rotating bracket; 4, scanning hole; 5, driving mechanism; 51, driving member; 52, driving wheel; 53, driving belt; 6, rotating frame; 61, connecting plate; 62, upper plate; 63, lower plate; 631, first plate body; 632, second plate body; 64, side plate; 7, X-ray tube; 9, counterweight; 10, cooling system; 11, high-voltage box; 12, control chassis; 13, tensioning mechanism; 131, tensioner; 132, first tensioning wheel; 133, second tensioning wheel; 14, ray port; 15, first mounting plate; 16, second mounting plate ;17. Support;181. First pull plate;182. Second pull plate;191. First tensioning member;192. Second tensioning member;20. Mounting frame;21. Reinforcement block;22. Limit rod;23. Limit block;24. Limit groove;25. Limit pin;26. First slide groove;27. Second slide groove;28. First limit rib;29. Second limit rib;30. Third limit rib;31. Moving rod;32. Locking block;33. Elastic member;34. Inlet groove;35. Rotating groove;36. Locking groove;37. Rotating bearing;38. Pull block;39. Pull groove;40. Accommodating groove;41. Connecting block. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1-9 This application is described in further detail.

[0040] The embodiment of the present application discloses a large-aperture CT scanning device.

[0041] Example 1:

[0042] Reference Figure 1 and Figure 2 A large-aperture CT scanning device includes a support frame 1, a fixed support frame 2 and a rotating support frame 3. The support frame 1 is in a U-shape. The two sides of the fixed support frame 2 in the horizontal direction are installed at the top of both sides of the support frame 1. The rotating support frame 3 is rotatably installed in the fixed support frame 2 through a rotating bearing 37. A scanning hole 4 is formed in the rotating bearing 37. The aperture of the scanning hole 4 is 800-850mm.

[0043] A drive mechanism 5 is mounted on the fixed bracket 2. The drive mechanism 5 includes a drive member 51, a drive wheel 52, and a drive belt 53. The drive member 51 is fixedly mounted within the fixed bracket 2. The drive wheel 52 is fixedly mounted on the drive shaft of the drive member 51. The drive belt 53 is sleeved around the drive wheel 52 and the rotating bracket 3. In this application, the drive member 51 can be a servo motor. The drive member 51 rotates the drive belt 53 via the drive wheel 52, and the drive belt 53 in turn rotates the rotating bracket 3.

[0044] A tensioning mechanism 13 is mounted on the fixed bracket 2. The tensioning mechanism 13 comprises a tensioner 131, a first tensioning pulley 132, and two second tensioning pulleys 133. The tensioner 131 is fixedly mounted within the fixed bracket 2. The first tensioning pulley 132 is mounted at the movable end of the tensioner 131 and abuts the outer sidewall of the drive belt 53. The two second tensioning pulleys 133 are rotatably mounted within the fixed bracket 2. The two second tensioning pulleys 133 are located on the upper and lower sides of the drive belt 53, respectively, and both abut the outer sidewalls of the drive belt 53. The tensioning mechanism 13 is used to tension the drive belt 53, preventing it from slipping.

[0045] Reference Figure 1 and Figure 3 A rotating frame 6 is mounted on the side wall of the rotating bracket 3. Rotating the rotating bracket 3 drives the rotating frame 6 to rotate synchronously. The rotating frame 6 comprises a connecting plate 61, an upper plate 62, a lower plate 63, and two side plates 64. A circular hole is formed in the center of the connecting plate 61. The connecting plate 61 is fixedly connected to the side wall of the rotating bracket 3. The upper plate 62, lower plate 63, and two side plates 64 are all fixedly mounted on the side wall of the connecting plate 61 away from the rotating bracket 3.

[0046] The upper plate 62 and the lower plate 63 are respectively located on the upper and lower sides of the scanning hole 4, and the two side plates 64 are respectively located on the left and right sides of the scanning hole 4 and installed along the tangential direction of the scanning hole 4, and the two ends of each side plate 64 are fixedly connected to the ends on the same side of the upper plate 62 and the lower plate 63.

[0047] The lower plate 63 comprises a first plate 631 and two second plates 632 fixedly mounted on the connecting plate 61. The first plate 631 is parallel to the upper plate 62 and is longer than the upper plate 62. The two second plates 632 are symmetrically located on either side of the first plate 631. The ends of the two second plates 632 that are closest to each other are fixedly connected to both ends of the first plate 631. The ends of the two second plates 632 that are away from the first plate 631 are inclined toward the upper plate 62, and the ends of the two second plates 632 that are away from each other are fixedly connected to the ends of the two side plates 64 that are away from the upper plate 62.

[0048] The X-ray tube 7 and the front collimator are respectively installed on the upper and lower sides of the upper plate 62; the cooling system 10, the high-voltage box 11 and the control chassis 12 are respectively installed on the side walls of the two side plates 64 away from each other; a detector is installed on the side of the connecting plate 61 close to the lower plate 63; a plurality of counterweights 9 are detachably fixedly installed on the first plate 631 and the second plate 632.

[0049] When rotating bracket 3 drives rotating frame 6 to rotate, it drives the various components to rotate, thereby performing a CT scan on the patient. The trapezoidal structure of rotating frame 6 reduces the distance between the X-ray tube 7, cooling system 10, high-voltage box 11, and control cabinet 12 and the center of the scanning aperture 4, reducing the centrifugal force on the components and improving the operational stability of the large-aperture CT scanner.

[0050] Reference Figure 4 A rectangular X-ray port 14 is formed in the upper plate 62. A first mounting plate 15 and a second mounting plate 16 are removably mounted to the upper plate 62 above the X-ray port 14 via bolts. The second mounting plate 16 is located above the first mounting plate 15, and the X-ray tube 7 is removably mounted to the second mounting plate 16 via a bracket 17. A mounting bracket 20 is removably mounted to the upper plate 62 below the X-ray port 14 via bolts. The front collimator is mounted within the mounting bracket 20.

[0051] A pull block 38 is fixedly installed at the end of the first mounting plate 15 in the length direction, and a first tensioning member 191 is installed on the internal thread of the pull block 38. A pull groove 39 is opened at one end of the top wall of the upper plate 62 in the length direction, and the first pull plate 181 is placed in the pull groove 39 of the upper plate 62, and the first tensioning member 191 passes through the first pull plate 181.

[0052] A second tensioning member 192 is threadedly mounted in the middle of the second mounting plate 16 in the width direction. A second pull plate 182 is slidably mounted on the second tensioning member 192, and the second pull plate 182 abuts against the side wall in the width direction of the upper plate 62. In this application, both the first tensioning member 191 and the second tensioning member 192 can be bolts.

[0053] After the first mounting plate 15 and the second mounting plate 16 are installed, the first tensioning member 191 and the second tensioning member 192 are rotated. The first tensioning member 191 pulls the pulling block 38 toward the first pulling plate 181. The first pulling plate 181 is pressed against the pulling groove 39. Thus, the first mounting plate 15 is tightened by the first pulling plate 181 and the pulling block 38. The second tensioning member 192 tightens the second mounting plate 16 through the second pulling plate 182, thereby making the X-ray tube 7 more securely installed.

[0054] The operating principle of a large-aperture CT scanner according to an embodiment of the present application is as follows: a driving member 51 rotates a driving belt 53 via a driving wheel 52, which in turn rotates a rotating support 3. The rotating support 3 rotates synchronously with the rotating frame 6, which in turn rotates the various components, thereby performing a CT scan on the patient. Because the rotating frame 6 has a trapezoidal structure, the distance from the X-ray tube 7, cooling system 10, high-voltage box 11, and control chassis 12 to the center of the scanning aperture 4 is shortened, reducing the centrifugal force on the components and improving the operational stability of the large-aperture CT scanner.

[0055] Example 2:

[0056] Reference Figure 5 and Figure 6 This embodiment differs from Embodiment 1 in that reinforcement blocks 21 are fixedly mounted on both inner sidewalls of the upper plate 62 along the length of the radiation port 14. Two limit rods 22 are slidably mounted on both ends of the mounting frame 20 along the length. Connecting blocks 41 are fixedly mounted on both ends of each support 17 along the length. The top of each limit rod 22 slides sequentially through the reinforcement block 21, the first mounting plate 15, the second mounting plate 16, and the connecting block 41. A limit block 23 is fixedly mounted on the bottom end of the limit rod 22. Four receiving slots 40 are defined on the bottom wall of the mounting frame 20, and the four limit blocks 23 are respectively located within the four receiving slots 40.

[0057] Reference Figure 6 and Figure 7 The top of the limit rod 22 defines a limit slot 24 along its width. A first slide slot 26 and a second slide slot 27 are defined on either side of the limit rod 22 within the connecting block 41. The second slide slot 27 is deeper than the limit slot 24, while the first slide slot 26 is less deep than the limit slot 24. The limit pin 25 is slidably mounted within the first and second slide slots 26 and 27 within the connecting block 41, and the limit pin 25 slides through the limit slot 24. A second limit ridge 29 is fixedly mounted on the middle portion of the top wall of the limit pin 25 along its width. A first limit ridge 28 and a third limit ridge 30 are fixedly mounted on both ends of the bottom wall of the limit pin 25 along its width.

[0058] After the limiting rod 22 slides through the reinforcing block 21, the first mounting plate 15, the second mounting plate 16, and the connecting block 41, the limiting pin 25 is inserted into the connecting block 41 from the second chute 27. The end of the limiting pin 25 passes through the second chute 27 and the limiting groove 24 in sequence and enters the first chute 26. At this time, the first limiting protrusion 28, the second limiting protrusion 29, and the third limiting protrusion 30 are respectively located at the notches of the first chute 26, the limiting groove 24, and the second chute 27. Then, the end of the limiting rod 22 is struck, and the limiting rod 22 drives the first limiting protrusion 28, the second limiting protrusion 29, and the third limiting protrusion 30 to enter the first chute 26, the limiting groove 24, and the second chute 27 at the same time.

[0059] At this point, the first limiting protrusion 28 abuts against the bottom wall of the first chute 26, the second limiting protrusion 29 abuts against the top wall of the limiting groove 24, and the third limiting protrusion 30 abuts against the bottom wall of the second chute 27, thereby securing the limiting rod 22. Simultaneously, the second limiting protrusion 29 pushes the limiting rod 22 upward, tightening the limiting block 23 within the accommodating groove 40. The limiting rod 22 reinforces the mounting frame 20, the reinforcement block 21, the first mounting plate 15, the second mounting plate 16, and the support 17, thereby further improving the stability of the installation of the X-ray tube 7 and the front collimator.

[0060] Reference Figure 8 and Figure 9 A moving rod 31 is mounted on the side wall of the connecting block 41. The moving rod 31 is slidably mounted in the connecting block 41 along the moving direction of the vertical stop pin 25, and the moving rod 31 is rotatably mounted in the connecting block 41. An elastic member 33 is sleeved on the moving rod 31. In this application, the elastic member 33 can be a spring, and one end of the elastic member 33 abuts the outer wall of the connecting block 41, and the other end abuts the end of the moving rod 31.

[0061] A locking block 32 is fixedly installed on the end of the moving rod 31 near the limit pin 25, and an inlet groove 34 is opened on the side wall of the limit pin 25 near the locking block 32. A rotation groove 35 is opened in the limit pin 25, and the rotation groove 35 is connected to the inlet groove 34. A locking groove 36 is opened on the inner side wall of the rotation groove 35 near the moving rod 31 in the limit pin 25, and the locking block 32 is slidably installed in the inlet groove 34 and the rotation groove 35.

[0062] After the stop pin 25 is installed, the movable rod 31 is pushed toward the stop pin 25. The movable rod 31 drives the locking block 32 into the inlet groove 34, and the end of the movable rod 31 presses the elastic member 33. After the locking block 32 enters the inlet groove 34, the movable rod 31 is rotated, which drives the locking block 32 to rotate within the rotation groove 35. When the locking block 32 rotates to the end of the rotation groove 35, the movable rod 31 is released. The elastic member 33, via the movable rod 31, drives the locking block 32 into the locking groove 36, locking the stop pin 25. This prevents the stop pin 25 from slipping out of the stop groove 24, thereby further improving the stability of the stop rod 22.

[0063] The implementation principle of Example 2 of the present application is as follows: After the limiting rod 22 slides through the reinforcement block 21, the first mounting plate 15, the second mounting plate 16, and the connecting block 41, the limiting pin 25 is inserted into the connecting block 41 from the second chute 27. The end of the limiting pin 25 passes through the second chute 27 and the limiting groove 24 in sequence and enters the first chute 26. The limiting rod 22 is then struck, causing the first limiting protrusion 28, the second limiting protrusion 29, and the third limiting protrusion 30 to simultaneously enter the first chute 26, the limiting groove 24, and the second chute 27. At this time, the first limiting protrusion 28 abuts against the bottom wall of the first chute 26, the second limiting protrusion 29 abuts against the top wall of the limiting groove 24, and the third limiting protrusion 30 abuts against the bottom wall of the second chute 27, thereby fixing the limiting rod 22. The limiting rod 22 reinforces the mounting frame 20 , the reinforcing block 21 , the first mounting plate 15 , the second mounting plate 16 and the support 17 , thereby further improving the installation stability of the X-ray tube 7 and the front collimator.

[0064] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A large-aperture CT scanning device, characterized in that: The invention comprises a support frame (1), a fixed support frame (2) and a rotating support frame (3), wherein the fixed support frame (2) is mounted on the support frame (1), the rotating support frame (3) is rotatably arranged in the fixed support frame (2), a scanning hole (4) is formed in the rotating support frame (3), and the aperture of the scanning hole (4) is 800-850 mm, a driving mechanism (5) for driving the rotating support frame (3) to rotate is arranged in the fixed support frame (2), a rotating frame (6) is fixedly arranged on the rotating support frame (3), and the rotating frame (6) comprises a connecting plate (61), an upper plate (62), a lower plate (63) and two side plates (64), and the connecting plate (61) is provided with a plurality of connecting plates (62) and a plurality of connecting plates (63). The plate (61) is fixedly arranged on the side wall of the rotating bracket (3), the upper plate (62) is fixedly arranged on the connecting plate (61), the side of the upper plate (62) away from the scanning hole (4) is provided with an X-ray tube (7), the side of the upper plate (62) close to the scanning hole (4) is provided with a front collimator, the lower plate (63) is parallel to the upper plate (62) and fixedly arranged on the connecting plate (61), the lower plate (63) is provided with a counterweight (9), the upper plate (62) and the lower plate (63) are respectively located on both sides of the diameter direction of the scanning hole (4), the length of the lower plate (63) is greater than the length of the upper plate (62), and the connecting plate ( 61) is provided with a detector on one side of the scanning hole (4) close to the lower plate (63), the two side plates (64) are fixedly provided on the connecting plate (61) and are located on both sides of the scanning hole (4), the two ends of the side plates (64) are fixedly connected to the same side of the upper plate (62) and the lower plate (63), the two side plates (64) are both provided along the tangent direction of the scanning hole (4), and the side walls of the two side plates (64) away from the scanning hole (4) are provided with a cooling system (10), a high-voltage box (11) and a control box (12); a ray port (14) is formed in the upper plate (62), and the upper plate (62) is located above the ray port (14) and stacked. A first mounting plate (15) and a second mounting plate (16) are detachably fixedly arranged on the stack, the second mounting plate (16) is located above the first mounting plate (15), the X-ray tube (7) is detachably fixedly arranged on the second mounting plate (16) through a support (17), a pull plate is provided on both adjacent side walls of the upper plate (62), a tensioning member is provided in the pull plate, and the two tensioning members are respectively connected to the first mounting plate (15) and the second mounting plate (16), the upper plate (62) is located below the ray port (14) and is detachably fixedly arranged with a mounting frame (20), and the front collimator is detachably fixedly arranged in the mounting frame (20);The upper plate (62) is fixedly provided with a reinforcement block (21) on the inner side wall of the ray port (14), a limit rod (22) is slidably passed through the mounting frame (20), a limit block (23) is provided at the bottom end of the limit rod (22), and the limit block (23) abuts against the bottom wall of the mounting frame (20), a connecting block (41) is fixedly provided on the side wall of the bracket, the limit rod (22) slides through the reinforcement block (21), the first mounting plate (15), the second mounting plate (16) and the connecting block (41), a limit pin (25) is slidably provided in the connecting block (41), a limit slot (24) is provided at the top of the limit rod (22), and the limit pin (25) passes through the limit slot (24) and limits the limit rod (22).

2. The large-aperture CT scanning device according to claim 1, characterized in that: The lower plate (63) includes a first plate body (631) and two second plate bodies (632), the first plate body (631) and the two second plate bodies (632) are fixedly connected to the connecting plate (61), the first plate body (631) is parallel to the upper plate (62), the two second plate bodies (632) are fixedly arranged at both ends of the first plate body (631) in the length direction, the two second plate bodies (632) are inclined toward the upper plate (62), and the ends of the two second plate bodies (632) away from the first plate body (631) are fixedly connected to the ends of the two side plates (64) away from the upper plate (62).

3. The large-aperture CT scanning device according to claim 1, characterized in that: The driving mechanism (5) comprises a driving member (51), a driving wheel (52) and a driving belt (53); the driving member (51) is fixedly arranged on a fixed bracket (2); the driving wheel (52) is arranged at a driving end of the driving member (51); the driving belt (53) is sleeved on the driving wheel (52) and the rotating bracket (3); and a tensioning mechanism (13) for tensioning the driving belt (53) is provided on the fixed bracket (2).

4. The large-aperture CT scanning device according to claim 3, characterized in that: The tensioning mechanism (13) comprises a tensioner (131), a first tensioning wheel (132) and two second tensioning wheels (133); the tensioner (131) is fixedly arranged on a fixed bracket (2); the first tensioning wheel (132) is rotatably arranged on a driving end of the tensioner (131); the two second tensioning wheels (133) are both rotatably mounted on the fixed bracket (2) and located at the upper and lower ends of the driving belt (53); and the first tensioning wheel (132) and the second tensioning wheel (133) both abut against the outer side wall of the driving belt (53).

5. The large-aperture CT scanning device according to claim 1, characterized in that: A first sliding groove (26) and a second sliding groove (27) are respectively provided on both sides of the limiting rod (22) in the connecting block (41), the depth of the second sliding groove (27) is greater than the depth of the first sliding groove (26), the limiting pin (25) is slidably arranged in the first sliding groove (26), the limiting groove (24) and the second sliding groove (27), the middle part of the top wall of the limiting pin (25) is provided with a second limiting convex strip (29), and the two ends of the bottom wall of the limiting pin (25) are provided with a first limiting convex strip (28) and a third limiting convex strip (30), when the limiting pin (25) passes through the limiting groove (24), the first limiting convex strip (28) is pressed against the bottom wall of the first sliding groove (26), the second limiting convex strip (29) is pressed against the top wall of the limiting groove (24), and the third limiting convex strip (30) is pressed against the bottom wall of the second sliding groove (27).

6. The large-aperture CT scanning device according to claim 1, characterized in that: A moving rod (31) is rotatably provided on the side wall of the connecting block (41), and the moving rod (31) is slidably provided in the connecting block (41) along the sliding direction of the vertical limit pin (25). A locking block (32) is provided at one end of the moving rod (31) close to the limit pin (25). An elastic member (33) is provided on the connecting block (41) for driving the moving rod (31) to move in a direction away from the limit pin (25). An inlet is provided on the side wall of the limit pin (25). The limiting pin (25) is provided with a rotation groove (35) connected with the inlet groove (34), the limiting pin (25) is provided with a locking groove (36) on the side wall of the rotation groove (35) close to the moving rod (31), the locking block (32) is slidably arranged in the inlet groove (34), the locking block (32) is rotatably arranged in the rotation groove (35), and the elastic member (33) drives the locking block (32) to be clamped in the locking groove (36) through the moving rod (31).

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