Industrial CT arc linear array X-ray detection device

Abstract

The utility model discloses an industrial CT (Computed Tomography) arc linear array X-ray detection device which comprises a horizontal filtering automatic adjusting mechanism unit, a vertical filter unit, a detector system unit, a shielding shield unit and a base unit, and the horizontal filtering automatic adjusting mechanism unit is positioned at the right front end of the whole device; the vertical filter unit is located at the middle end of the device, the detector system unit is located at the rear end of the device, the shielding shield unit shields the top face and the side face of the periphery of the device, and all the units are connected and fixed to the base unit. The X-ray shielding device has the advantages that the structure is compact, the horizontal filtering gap can be automatically adjusted, and good X-ray shielding capability is provided; the PD module and the vertical gap of the vertical filter are limited through a standard plug gauge measuring tool, so that efficient alignment of the scintillator and the vertical gap is ensured; the shielding shield and the base provide a good electromagnetic shielding environment, a high-rigidity and high-precision structural carrier and the like.

Description

Technical Field

[0001] The utility model relates to a detection device, in particular to an industrial CT arc line array X-ray detection device. Background Art

[0002] In the industrial CT detection industry, the conventional structure of the arc line array detection device is: horizontal filter device, vertical filter, and detector device. The three are independent of each other and are placed horizontally from front to back in the principle order of ray collimation and detection.

[0003] The conventional structure of the horizontal filter device is: the linear rails on both sides serve as the guide components for the moving tungsten bar, and the moving tungsten bar is driven by a single set of worm screw screw elevators in the middle with a servo motor to achieve automatic lifting and lowering control of the moving tungsten bar. However, this structure is relatively complex, has high requirements for installation and adjustment, and occupies a large height space;

[0004] The conventional structure of vertical filter is: tungsten block blank (or blank formed by 3D printing and powder metallurgy) is processed by slow wire cutting to produce high-precision alignment seams and fine machining to produce the overall shape and mounting base. However, this structure is an integral tungsten block, the effective utilization rate of tungsten is low, the material cost is high, and the economic efficiency is relatively poor;

[0005] The conventional structure of the detector device is: PD module, detection board and acquisition board, which are encapsulated into an integral module through an aluminum alloy shielding shell to ensure good anti-electromagnetic interference effect. However, when the integral module is aligned with the collimation slit on the vertical filter, the angle and position of the integral module and the PD module need to be adjusted repeatedly, and the alignment of the scintillator in the PD module and the collimation slit on the vertical filter cannot be completed efficiently in a short time;

[0006] The structure of the conventional arc-shaped linear array detection device as a whole occupies a large space in height and width, resulting in a large overall load. When in use, it requires a larger detector slide, a longer effective lifting stroke, and a larger effective lifting load capacity, which is an unreasonable design. Utility Model Content

[0007] The purpose of the utility model is to solve the problems in the prior art that the structure of the arc line array detection device as a whole occupies a large space, resulting in a large overall load and unreasonable design, and thus propose an industrial CT arc line array X-ray detection device.

[0008] To achieve the above object, the utility model adopts the following technical solutions: An industrial CT arc-shaped linear array X-ray detection device, which includes a horizontal filtration automatic adjustment mechanism unit, a vertical filter unit, a detector system unit, a shielding cover unit, and a base unit; the horizontal filtration automatic adjustment mechanism unit is located at the front end of the entire device, the vertical filter unit is located at the middle end of the device, the detector system unit is located at the rear end of the device, and the shielding cover unit shields the top surface and side surfaces of the periphery of the device. The above units are all connected and fixed to the base unit.

[0009] Furthermore, the base unit includes a filter base and a linear array base plate; the filter base is fixed on the top of the linear array base plate. The two mainly serve as the installation foundation for the above 4 units, and also serve to fix and adjust the position of the entire device and the detector lifting platform.

[0010] Furthermore, the horizontal filtration automatic adjustment mechanism unit includes: moving tungsten bars, fixed tungsten bars, lifting cross beams, guide columns, oil-free bushings, sliding inclined blocks, fixed inclined blocks, electric cylinder seats, motor shielding blocks, electric push rods, planetary reducers, servo motors, locking nuts, rectangular springs, guide keys, and floating joints;

[0011] The fixed tungsten bars are fixed on the filter base; the moving tungsten bars are located directly above the fixed tungsten bars and are fixed to the lower end of the lifting cross beam; the guide columns are in interference fit with the filter base; the guide columns, oil-free bushings, rectangular springs, and locking nuts are combined to form a guide preloading mechanism at both ends of the lifting cross beam; the fixed inclined blocks are fixed to the lower ends on both sides of the lifting cross beam; the fixed inclined blocks, sliding inclined blocks, guide keys, and filter base are combined from top to bottom to form a sliding lifting mechanism; the electric cylinder seat is fixed on the filter base; the electric push rod is fixed on the electric cylinder seat; the servo motor, planetary reducer, electric push rod, and floating joint are sequentially connected and combined to form a lifting drive mechanism; the two sides of the lifting drive mechanism are synchronously controlled to push the sliding lifting mechanism, and the sliding lifting mechanism drives the lifting cross beam again to realize the relative movement between the moving tungsten bars and the fixed tungsten bars, playing the role of automatically adjusting the horizontal filtration gap.

[0012] Furthermore, the vertical filter unit includes a filter tungsten grid, a grid stainless steel base, and a positioning pin;

[0013] The filter tungsten grid and the grid stainless steel base are positioned by the positioning pin and fixed by screws.

[0014] Furthermore, the detector system unit includes a PD module, a detection board, a collection board, and a Core mounting board;

[0015] The PD module is fixed on the filter base, and the detection board is fixed above the linear array base plate through copper columns; the collection board is fixed above the Core mounting board through copper columns.

[0016] Furthermore, the shielding cover unit includes an incident guard plate, an incident baffle, side guard plates, a top guard plate, a rear guard plate, a shielding bottom plate, a first motor shielding plate, a second motor shielding plate, reinforcing plates, lifting rings, handles, detector cable connectors, motor cable connectors, and corner columns;

[0017] The incident guard plate, the incident baffle, the side guard plates, the top guard plate, the rear guard plate, 4 corner columns, the reinforcing plates, the detector cable connectors, and the motor cable connectors are connected to each other by screws to form a shielding cover frame; the incident baffle has a wall thickness of 0.5 mm, the shielding bottom plate contacts the side plates of the shielding cover frame, the lifting rings are connected to the filter base by screws, and the handles are connected to the top guard plate.

[0018] The beneficial effects of the present utility model are:

[0019] (1) Simplify the structure of the horizontal filter device, reduce the installation and adjustment difficulty, and greatly reduce the occupation of height space;

[0020] (2) Improve the effective utilization rate of tungsten and reduce the material cost;

[0021] (3) Efficiently complete the alignment work between the scintillator in the PD module and the collimation slit on the vertical filter within a short time;

[0022] (4) Reduce the overall space occupation rate and overall weight of the detection device, shorten the effective lifting stroke, and reduce the difficulty of the effective lifting load. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 2 It is an internal sectional view of the overall structure of the present utility model;

[0025] Figure 3 It is a schematic diagram of the structural connection of the horizontal filter automatic adjustment mechanism unit, the detector system unit, and the base unit in the present utility model;

[0026] Figure 4 It is a schematic diagram of the partial structure of the vertical filter unit in the present utility model;

[0027] Figure 5 It is a schematic diagram of the partial structure of the shielding cover unit in the present utility model;

[0028] Figure 6 It is a schematic diagram of the partial structure of the shielding cover unit in the present utility model Figure 2 .

[0029] In the figure: Automatic adjustment mechanism unit 1, moving tungsten bar 101, fixed tungsten bar 102, lifting crossbeam 103, guiding column 104, oil-free bushing 105, sliding inclined block 106, fixed inclined block 107, electric cylinder base 108, motor shielding block 109, electric push rod 110, planetary reducer 111, servo motor 112, locking nut 113, rectangular spring 114, guiding key 115, floating joint 116;

[0030] Vertical filter unit 2, filter tungsten grille 201, grille stainless steel base 202, positioning pin 203;

[0031] Detector system unit 3, PD module 301, detection board 302, acquisition board 303, Core mounting board 304;

[0032] Shielding cover unit 4, incident protection plate 401, incident baffle 402, side protection plate 403, top protection plate 404, rear protection plate 405, shielding bottom plate 406, motor shielding plate one 407, motor shielding plate two 408, reinforcement plate 409, lifting ring 410, handle 411, detector cable connector 412, motor cable connector 413, corner column 414;

[0033] Base unit 5, filter base 501, linear array bottom plate 502. Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Referring to Figures 1 to 6 , this embodiment provides an industrial CT arc linear array X-ray detection device, which includes a horizontal filtration automatic adjustment mechanism unit 1, a vertical filter unit 2, a detector system unit 3, a shielding cover unit 4, and a base unit 5; the horizontal filtration automatic adjustment mechanism unit 1 is located at the front end of the whole device, the vertical filter unit 2 is located at the middle end of the device, the detector system unit 3 is located at the rear end of the device, the shielding cover unit 4 shields the top and side surfaces of the periphery of the device, and the above units are all connected and fixed to the base unit 5.

[0036] Furthermore, the base unit 5 includes a filter base 501 and a linear array bottom plate 502; the filter base 501 is fixed on the top of the linear array bottom plate 502, and the two mainly serve as the installation bases for the above 4 units, and also serve to fix and adjust the position of the whole device and the detector lifting platform.

[0037] Furthermore, the horizontal filtration automatic adjustment mechanism unit 1 includes: a moving tungsten bar 101, a fixed tungsten bar 102, a lifting crossbeam 103, a guiding column 104, an oil-free bushing 105, a sliding inclined block 106, a fixed inclined block 107, an electric cylinder base 108, a motor shielding block 109, an electric push rod 110, a planetary reducer 111, a servo motor 112, a locking nut 113, a rectangular spring 114, a guiding key 115, and a floating joint 116;

[0038] The fixed tungsten bar 102 is fixed on the filter base 501; the moving tungsten bar 101 is located directly above the fixed tungsten bar 102 and is fixed to the lower end of the lifting crossbeam 103; the guiding column 104 is in interference fit with the filter base 501; the guiding column 104, the oil-free bushing 105, the rectangular spring 114, and the locking nut 113 are combined with each other to form a guiding and preloading mechanism at both ends of the lifting crossbeam 103; the fixed inclined block 107 is fixed to the lower ends on both sides of the lifting crossbeam 103; the fixed inclined block 107, the sliding inclined block 106, the guiding key 115, and the filter base 501 are combined from top to bottom to form a sliding and lifting mechanism; the electric cylinder base 108 is fixed on the filter base 501; the electric push rod 110 is fixed on the electric cylinder base 108; the servo motor 112, the planetary reducer 111, the electric push rod 110, and the floating joint 116 are connected in sequence to form a lifting drive mechanism; the two sides of the lifting drive mechanism are synchronously controlled to push the sliding and lifting mechanism, and the sliding and lifting mechanism drives the lifting crossbeam 103 to realize the relative movement between the moving tungsten bar 101 and the fixed tungsten bar 102, playing the role of automatically adjusting the horizontal filtration gap.

[0039] Furthermore, the vertical filter unit 2 includes a filter tungsten grid 201, a grid stainless steel base 202, and a positioning pin 203;

[0040] The filter tungsten grid 201 and the grid stainless steel base 202 are positioned by the positioning pin 203 and fixed by screws, and then the high-precision collimation seams are machined by wire electrical discharge machining with slow feed rate and the overall shape and installation base are machined by finish machining.

[0041] Furthermore, the detector system unit 3 includes a PD module 301, a detection board 302, a collection board 303, and a Core mounting board 304;

[0042] The PD module 301 is fixed on the filter base 501, and the front end of the PCB board of the PD module 301 is in tangential contact with the vertical filter unit 2 in an arc shape. Based on the collimation seams on the corresponding vertical filter unit 2 on both sides of the PD module 301, a combination feeler gauge is used to accurately position each PD module 301, reducing the need for repeated adjustment of the angle and position in the later stage; the detection board 302 is fixed above the linear array base plate 502 through copper columns; the collection board 303 is fixed above the Core mounting board 304 through copper columns.

[0043] Furthermore, the shielding cover unit 4 includes an incident protection plate 401, an incident baffle 402, side protection plates 403, a top protection plate 404, a rear protection plate 405, a shielding bottom plate 406, a first motor shielding plate 407, a second motor shielding plate 408, a reinforcing plate 409, a lifting ring 410, a handle 411, a detector cable connector 412, a motor cable connector 413, and corner columns 414;

[0044] The incident protection plate 401, the incident baffle 402, the side protection plates 403, the top protection plate 404, the rear protection plate 405, four corner columns 414, the reinforcing plate 409, the detector cable connector 412, and the motor cable connector 413 are connected to each other by screws to form a shielding cover frame; among them, the incident baffle 402 has a wall thickness of 0.5 mm, which does not affect the penetration of rays and shields external electromagnetic waves; the shielding bottom plate 406 is in contact with the side plate of the shielding cover frame to form a good conductive circuit, facilitating the good conductive grounding of the detector system unit 3 and shielding external electromagnetic interference; the first motor shielding plate 407 and the second motor shielding plate 408 mainly shield the electromagnetic interference between the servo motor 112 and the detector system unit 3; the lifting ring 410 is connected to the filter base 501 through a screw rod and is mainly used for overall lifting; the handle 411 is connected to the top protection plate 404 and is used for loading and unloading the top protection plate 404 during debugging.

[0045] Working principle:

[0046] In the present utility model, during use, according to the actual usage requirements, through remote control by the host computer software, the appropriate size of the horizontal collimation slit is selected, and then the scanning detection work is carried out. The X-ray forms a horizontal fan-shaped ray with an equal thickness cut layer after passing through the horizontal filter. The horizontal fan-shaped ray is then divided into an arc-shaped array of rays with equal spacing and thickness by the filter tungsten gratings 201 with equal spacing and thickness of the vertical filter unit 2. The ray is absorbed by the scintillator inside the PD module 301 of the detector system corresponding to each vertical slit. The scintillator converts the X-ray into an analog signal, and the detection board 302 converts the analog signal into a corresponding digital signal; the acquisition board 303 controls the detection board 302 to perform image acquisition, receives relevant encoder signals through the external trigger interface, combines and processes the image data information of all detection boards 302, and communicates with the PC end through the gigabit network interface. Through a large number of calculations, the relevant information of the cut layer plane of the workpiece to be inspected is obtained, and the image of this plane is reconstructed therefrom, intuitively showing the nature, shape, position, and size of the detected defects. Even after multi-layer scanning, through software calculation, the multi-layer plane images are constructed into a three-dimensional image to display the internal structure and defects of the workpiece.

[0047] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. An industrial CT arc-shaped linear array X-ray detection device, which comprises a horizontal filtration automatic adjustment mechanism unit (1), a vertical filter unit (2), a detector system unit (3), a shielding cover unit (4) and a base unit (5); characterized in that: The horizontal filtration automatic adjustment mechanism unit (1) is located at the very front end of the entire device, the vertical filter unit (2) is located at the middle end of the device, the detector system unit (3) is located at the rear end of the device, and the shielding cover unit (4) shields the top and side surfaces of the periphery of the device. The above units are all connected and fixed to the base unit (5).

2. The industrial CT arc-shaped linear array X-ray detection device according to claim 1, characterized in that: The base unit (5) includes a filter base (501) and a linear array base plate (502); the filter base (501) is fixed on the top of the linear array base plate (502).

3. The industrial CT arc-shaped linear array X-ray detection device according to claim 2, characterized in that: The horizontal filtration automatic adjustment mechanism unit (1) includes: a moving tungsten bar (101), a fixed tungsten bar (102), a lifting cross beam (103), a guide post (104), an oil-free bushing (105), a sliding inclined block (106), a fixed inclined block (107), an electric cylinder seat (108), a motor shielding block (109), an electric push rod (110), a planetary reducer (111), a servo motor (112), a locking nut (113), a rectangular spring (114), a guide key (115) and a floating joint (116); The fixed tungsten bar (102) is fixed on the filter base (501); the moving tungsten bar (101) is located directly above the fixed tungsten bar (102) and is fixed to the lower end of the lifting cross beam (103); the guide post (104) is in interference fit with the filter base (501); the guide post (104), the oil-free bushing (105), the rectangular spring (114) and the locking nut (113) are combined with each other to form a guide preloading mechanism at both ends of the lifting cross beam (103); the fixed inclined block (107) is fixed to the lower ends on both sides of the lifting cross beam (103); the fixed inclined block (107), the sliding inclined block (106), the guide key (115) and the filter base (501) are combined from top to bottom to form a sliding lifting mechanism; the electric cylinder seat (108) is fixed on the filter base (501); the electric push rod (110) is fixed on the electric cylinder seat (108); the servo motor (112), the planetary reducer (111), the electric push rod (110) and the floating joint (116) are connected and combined in sequence to form a lifting drive mechanism.

4. The industrial CT arc-shaped linear array X-ray detection device according to claim 1, wherein: The vertical filter unit (2) includes a filter tungsten grille (201), a grille stainless steel base (202), and a positioning pin (203); The filter tungsten grille (201) and the grille stainless steel base (202) are positioned by the positioning pin (203) and fixed by screws.

5. The industrial CT arc-shaped linear array X-ray detection device according to claim 3, characterized in that: The detector system unit (3) includes a PD module (301), a detection board (302), a collection board (303), and a Core mounting board (304); The PD module (301) is fixed on the filter base (501), and the detection board (302) is fixed above the linear array base plate (502) through copper posts; the collection board (303) is fixed above the Core mounting board (304) through copper posts.

6. The industrial CT arc-shaped linear array X-ray detection device according to claim 5, wherein: The shielding cover unit (4) includes an incident guard plate (401), an incident baffle (402), side guard plates (403), a top guard plate (404), a rear guard plate (405), a shielding bottom plate (406), a first motor shielding plate (407), a second motor shielding plate (408), a reinforcing plate (409), a lifting ring (410), a handle (411), a detector cable connector (412), a motor cable connector (413), and a corner post (414); The incident guard plate (401), the incident baffle (402), the side guard plates (403), the top guard plate (404), the rear guard plate (405), four corner posts (414), the reinforcing plate (409), the detector cable connector (412), and the motor cable connector (413) are connected to each other by screws to form a shielding cover frame; the incident baffle (402) has a wall thickness of 0.5 mm, the shielding bottom plate (406) is in contact with the side plate of the shielding cover frame, the lifting ring (410) is connected to the filter base (501) through a screw rod, and the handle (411) is connected to the top guard plate (404).

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