Beam limiting device for X-ray machine with C-shaped arm

Abstract

The utility model discloses a beam limiting device for a C-shaped arm X-ray machine, and relates to the technical field of beam limiting devices, the beam limiting device for the C-shaped arm X-ray machine comprises a bottom plate, a filtering assembly, a main board assembly and a shell assembly, the filtering assembly is installed on the bottom plate, and the main board assembly is fixedly installed on the bottom plate through a bi-pass hexagonal stud; the filtering assembly comprises a filtering gear and a plurality of filtering pieces, the main plate assembly comprises a mounting plate and two groups of shading parts, the two groups of shading parts are mounted on the upper side and the lower side of the mounting plate respectively, and each shading part comprises an optical axis, a sliding seat and a lead hinge; the motion mode of the lead page of the mainboard assembly is redesigned, that is, the lead page and the filtering gear are remotely controlled to reciprocate through the motor control system, the original circular X-ray irradiation range is changed, the filtering pieces of different materials and thicknesses can be replaced by controlling the filtering gear to rotate to directly face the light inlet holes in the bottom plate, and therefore the light emitting efficiency is improved. And altered aluminum equivalent filtration is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of beam limiters, in particular to a beam limiter used for a C-arm X-ray machine. Background Art

[0002] A C-arm X-ray machine is a mobile X-ray generating device. It has a C-shaped frame, a tube that generates X-rays, an image intensifier that collects images, and an image processing workstation. The beam limiter is usually located under the tube. The X-rays emitted by the tube are irradiated onto the object being examined through the beam limiter.

[0003] Beam limiter, also called "line blocker", "light shrinker" or "beam limiter", is used to limit the irradiation range of X-rays emitted from the tube, so as to minimize the dose of X-rays received by the inspection object. The beam limiter generally includes a bottom plate, an additional filter assembly, a main assembly and a shell. The bottom plate, the additional filter assembly and the opening limit structure are installed in the shell. The additional filter assembly can be rotated by the program to automatically select different aluminum equivalent filters. The main assembly is used to control the size of the beam limiter opening, thereby determining the irradiation range of X-rays.

[0004] However, the X-ray irradiation range formed by the existing beam limiter in the C-arm is circular in shape, which does not match the square imaging screen shape of the existing image receiver, resulting in image loss. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a beam limiter for a C-arm X-ray machine. The structure of the beam limiter currently used in the C-arm is designed to change the original circular X-ray irradiation range into a square X-ray irradiation range, which can be matched with the square imaging screen shape of the existing image receiver to ensure that the image will not be lost.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions: a beam limiter for a C-arm X-ray machine, comprising a bottom plate, a filter assembly, a main board assembly, and a shell assembly, wherein the filter assembly is mounted on the bottom plate, and the main board assembly is fixedly mounted on the bottom plate using a double-pass hexagonal stud;

[0007] The filter assembly includes a filter gear and multiple filter plates. The filter gear is rotatably mounted on the bottom plate. A neutral opening is provided on the filter gear. The materials and thicknesses of the multiple filter plates are different and they are fixedly mounted on the filter gear. A light inlet is provided on the bottom plate. Different filter plates or neutral openings can be aligned with the light inlet by rotating the filter gear.

[0008] The main board assembly includes a mounting plate and two groups of shading parts, the two groups of shading parts are respectively mounted on the upper and lower sides of the mounting plate, the shading part includes an optical axis, a slide seat, and a lead sheet, the optical axis is fixedly mounted on the mounting plate through an optical axis bracket, the slide seat is a pair and slides on the optical axis, and each slide seat is fixedly mounted with the lead sheet;

[0009] The two pairs of slide seats in the two groups of shading parts are cross-arranged in a tic-tac-toe shape, and linkage parts are provided on the mounting plates located on one side of the two groups of shading parts, and the positions of the slide seats in the two groups of shading parts are adjusted by the two groups of linkage parts.

[0010] Preferably, the linkage part includes a synchronous pulley 1, a synchronous pulley 2, a long connecting plate assembly, a short connecting plate assembly, and a synchronous belt. The synchronous pulley 1 is rotatably arranged on the mounting plate, and the synchronous belt is sleeved on the synchronous pulley 1 and the synchronous pulley 2. One ends of the long connecting plate assembly and the short connecting plate assembly are respectively fixedly connected to two side edges of the synchronous belt, and the other ends of the long connecting plate assembly and the short connecting plate assembly are respectively connected to a pair of the sliding seats.

[0011] Preferably, a second stepper motor and a third stepper motor are fixedly arranged on the mounting plate, and the second synchronous pulleys in the two groups of linkage parts are respectively connected to the driving ends of the second stepper motor and the third stepper motor.

[0012] Preferably, a slot-type optical coupler is fixedly provided on the mounting plate located on the other side of each group of the shading parts, and an optical coupler baffle is fixedly installed on one of the pair of slides, and the optical coupler baffle can slide across the notch in the slot-type optical coupler when the slide moves.

[0013] Preferably, the filter assembly further includes a second optical coupling baffle and an optical coupler, wherein the second optical coupling baffle is fixedly connected to the filter gear, and the optical coupler is fixed to the bottom plate, and the second optical coupling baffle can pass through the optical coupling notch in the optical coupler by rotating the filter gear.

[0014] Preferably, a stepper motor 1 is fixedly mounted on the bottom plate via a motor bracket 1, a filter motor gear is fixedly mounted on the driving end of the stepper motor 1, and the filter motor gear is meshed with the filter gear.

[0015] Preferably, the long connecting plate assembly comprises a long connecting plate, a clamping block and a top block, wherein the long connecting plate is fixed to the clamping block by countersunk screws, and the top block is fixed to the clamping block by pan head screws.

[0016] Preferably, the short connecting plate assembly comprises a short connecting plate, a clamping block and a top block, the short connecting plate is fixed to the clamping block by countersunk screws, and the top block is fixed to the clamping block by pan head screws.

[0017] Preferably, the shell assembly includes a back cover, a shell and a front cover, and the inner walls of the back cover, the shell and the front cover are all adhered with a 1 mm thick lead plate, the shell is fixed to the base plate by pan head screws, the back cover is fixed to the shell by pan head screws, and the front cover is fixed to the base plate assembly by pan head screws.

[0018] Preferably, the base plate is fixedly connected to a hanging plate, and the hanging plate is fixedly connected to the base plate via a connecting ring.

[0019] Beneficial Effects

[0020] The utility model provides a beam limiter for a C-arm X-ray machine, which has the following beneficial effects: by redesigning the movement mode of the lead sheet of the mainboard assembly, that is, by remotely controlling the reciprocating movement of the lead sheet and the filter gear through a motor control system, the original circular X-ray irradiation range is changed to form a square X-ray irradiation range, and by controlling the rotation of the filter gear, filters of different material thicknesses can be replaced to face the light inlet hole on the bottom plate, thereby changing the aluminum equivalent filtration and realizing automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the main internal structure diagram of the utility model;

[0022] Figure 2 is a three-dimensional diagram of a filter assembly;

[0023] Figure 3 A three-dimensional diagram of a filter disc assembly;

[0024] Figure 4 is a three-dimensional diagram of a stepper motor 1;

[0025] Figure 5 Three-dimensional motherboard assembly Figure 1 ;

[0026] Figure 6 is a three-dimensional diagram of the slide;

[0027] Figure 7 is a three-dimensional diagram of a long connecting plate assembly;

[0028] Figure 8 is a three-dimensional diagram of a short connecting plate assembly;

[0029] Fig. 9 Three-dimensional motherboard assembly Figure 2 ;

[0030] Fig.10 is a three-dimensional diagram of stepper motor 2;

[0031] Fig.11 It is a three-dimensional diagram of the shell assembly.

[0032] In the figure: 1, bottom plate assembly; 11, bottom plate; 12, connecting ring; 13, hanging plate; 14, filter shaft; 15, light inlet; 2, filter assembly; 21, filter plate assembly; 22, optical coupling baffle plate 2; 23, optical coupler; 24, filter motor assembly; 211, filter gear; 212, filter plate; 213, filter sleeve; 214, neutral opening; 241, stepper motor 1; 242, motor bracket 1; 243, filter motor gear; 3, double-pass hexagonal stud; 4, main board assembly; 41, mounting plate; 42, optical axis bracket; 43, Optical axis; 45, synchronous pulley one; 46, synchronous pulley shaft; 47, long connecting plate assembly; 48, short connecting plate assembly; 49, synchronous belt; 410, synchronous pulley two; 411, stepper motor two; 412, optical coupler baffle one; 413, slotted optical coupler; 414, stepper motor three; 441, slide seat; 442, lead sheet; 443, linear bearing; 4141, machine bracket two; 471, long connecting plate; 472, clamping block; 473, top block; 481, short connecting plate; 5, housing assembly; 51, rear cover; 52, housing; 53, front cover. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] See also Figure 1-11 The utility model provides a technical solution: a beam limiter for a C-arm X-ray machine comprises: a bottom plate assembly 1, a filter assembly 2, a main board assembly 4, and a shell assembly 5.

[0035] As an embodiment of the present utility model, Figure 1 , Figure 2 As shown, the base plate assembly 1 includes a base plate 11, a connecting ring 12, a hanging plate 13, a filter shaft 14, and a light inlet 15. The filter shaft 14 is welded on the base plate 11 and is used for rotating the filter assembly 2. The connecting ring 12 is connected to the base plate 11 by a countersunk screw to fix the hanging plate 13. One end of the hanging plate 13 is connected to the tube component by four M6 screws, and the other end is inserted into the connecting ring 12. The four set screws are tightened to fix the hanging plate 13. The light inlet 15 is opened on the base plate 11.

[0036] As an embodiment of the present utility model, Figure 2 As shown, the filter assembly 2 includes a filter disc assembly 21, an optical coupling baffle 22, an optical coupler 23, and a filter motor assembly 24. Figure 3As shown, the filter assembly 21 is composed of a filter gear 211, a plurality of filter plates 212, a filter sleeve 213, and an intermediate opening 214. The three filter plates 212 made of different materials and thicknesses are fixed to the filter gear 211 by metal glue and hollow rivets. The intermediate opening 214 is provided on the gear 211. The filter sleeve 213 is fixed to the filter gear 211 by a pan head screw. The filter assembly 21 passes the center hole of the filter sleeve 213 through the filter shaft 14, and the upper end is fixed with a copper gasket and an open retaining ring, so that the filter assembly 21 can rotate freely on the shaft without falling off. The optical coupling baffle 22 is fixed to the filter gear 211 by a pan head screw, and the optical coupler 23 is fixed to the bottom plate 11. When the filter gear 211 is rotated, the optical coupling baffle 22 can pass through the optical coupling notch in the optical coupler 23. As shown Figure 4 As shown, the filter motor assembly 24 is composed of a stepper motor 241, a motor bracket 242, and a filter motor gear 243. The stepper motor 241 is fixed to the motor bracket 242 by a countersunk screw, and the motor bracket 242 is fixed to the base plate 11 by a hexagon socket head screw. The additional filter gear 243 is fixed to the driving end of the stepper motor 241 by a set screw. The filter motor gear 243 is meshed with the filter gear 211, and the filter gear 211 is driven to rotate by the stepper motor 241. The stepper motor 241 is connected to the motor control system through electrical control. The filter assembly 2 is automatically controlled by the motor control system.

[0037] In this embodiment, an electric signal is given through the motor control system, the filter disc assembly 21 is reset, the optical coupling baffle 22 passes the optical coupler 23, and the idle opening 214 in the filter disc assembly 21 is aligned with the light inlet hole 15 in the bottom plate 11. When a signal is given, the filter disc assembly 21 rotates, and according to the number of signal pulses, the filter 212 makes the filter of the corresponding material thickness face the light inlet hole 15 on the bottom plate 11, thereby changing the aluminum equivalent filtering.

[0038] As an embodiment of the present utility model, Figure 1 As shown, four double-pass hexagonal studs 3 are fixed to the bottom plate 11 by countersunk screws, and the main plate assembly 4 is fixed to the double-pass hexagonal studs 3 by countersunk screws.

[0039] As an embodiment of the present utility model, Figure 5 , Figure 6 , Fig. 9As shown, the main board assembly 4 includes a mounting plate 41, a stepper motor 2 411, a stepper motor 3 414, an optical coupler baffle 1 412, a slotted optical coupler 413, and two groups of shading parts. The two groups of shading parts are respectively mounted on the upper and lower sides of the mounting plate 41. The shading part includes an optical axis bracket 42, an optical axis 43, a pair of slides 441, a lead sheet 442, and a linear bearing 443. The two pairs of slides 441 in the two groups of shading parts are cross-arranged in a tic-tac-toe shape. The linear bearing 443 is installed in the two end holes of the slide 441, the lead sheet 442 is riveted to the slide 441 by lead wire, and the slide 441 is installed with the optical axis 43 through the middle hole of the linear bearing 443 to ensure that the slide 441 slides freely on the optical axis 43. A linkage part is provided on the mounting plate 41 located on one side of the two groups of shading parts. The linkage part includes a synchronous pulley 45, a synchronous pulley shaft 46, a long connecting plate assembly 47, a short connecting plate assembly 48, a synchronous belt 49, and a synchronous pulley 410. The synchronous pulley shaft 46 is welded on the mounting plate 41. A ball bearing is installed inside the synchronous pulley 45 and is installed on the synchronous pulley shaft 46 through a bearing hole. A flat gasket and an open retaining ring are used on the upper end to ensure that the synchronous pulley 45 can rotate freely on the synchronous pulley shaft 46. The stepper motor 411 and the stepper motor 413 are connected to the synchronous pulley shaft 414. 14 are fixedly mounted on the mounting plate 41, the stepper motor 3 414 is fixed to the motor bracket 2 4141 by countersunk screws, the motor bracket 2 4141 is fixed to the mounting plate 41 by pan head screws, the synchronous pulley 2 410 in the two sets of linkage parts are respectively connected to the driving end of the stepper motor 2 411 and the driving end of the stepper motor 3 414, and the synchronous belt 49 is sleeved on the synchronous pulley 1 45 and the synchronous pulley 2 410 to ensure that the synchronous belt 49 can rotate freely. Figure 7 As shown, the long connecting plate assembly 47 includes a long connecting plate 471, a clamping block 472, and a top block 473. The long connecting plate 471 is fixed to the clamping block 472 by countersunk screws, and the top block 473 is fixed to the clamping block 472 by pan head screws. One end of the long connecting plate 471 with a long hole is used for fixed connection with the slide 441, and the other end is used for fixed connection with the synchronous belt 49, so as to ensure that the slides 441 on both sides can move relative to each other in a mirror image when the synchronous belt 49 moves. Figure 8 As shown, the short connecting plate assembly 48 includes a short connecting plate 481, a clamping block 472, and a top block 473. The short connecting plate 481 is fixed to the clamping block 472 by countersunk screws, and the top block 473 is fixed to the clamping block 472 by pan head screws. One end of the short connecting plate 481 with a long hole is used for fixed connection with the slide 441, and the other end is used for fixed connection with the synchronous belt 49, so as to ensure that the slides 441 on both sides can move relative to each other in a mirror image when the synchronous belt 49 moves. Figure 5 , Fig. 9As shown, a slot-type optical coupler 413 is fixedly installed on the mounting plate 41 located on the other side of each group of the shading parts by using pan head screws, and an optical coupler baffle 412 is fixedly installed on one of the pair of slides 441 by using pan head screws, and when the slide 441 moves, the optical coupler baffle 412 can slide through the gap in the slot-type optical coupler 413.

[0040] In this embodiment, the stepper motor 2 411 is connected to the motor control system through a cable. In the X direction, the control system gives a signal, the stepper motor 2 411 rotates, drives the synchronous belt 49 to move, and makes the slides 441 at both ends move relative to each other in mirror image. According to the number of electrical signal pulses, the slide 441 moves according to the relative number of steps until it is completely closed. The electrical signal is reoriented to make the slide 441 run to the farthest end, the optical coupling baffle 1 412 passes through the notch of the slot-type optical coupling 413, and the lead sheet 442 in the X direction is reset to the maximum. In the Y direction, the control system gives a signal, the stepper motor 3 414 rotates, drives the synchronous belt 49 to move, and makes the slides 441 at both ends move relative to each other in mirror image. According to the number of electrical signal pulses, the slide 441 moves according to the relative number of steps until it is completely closed. The electrical signal is reoriented to make the slide 441 run to the farthest end, the optical coupling baffle 1 412 passes through the notch of the slot-type optical coupling 413, and the lead sheet 442 in the Y direction is reset to the maximum.

[0041] As an embodiment of the present utility model, Fig.11 As shown, the shell assembly 5 is composed of a rear cover 51, a shell 52, and a front cover 53. The inner walls of the rear cover 51, the shell 52, and the front cover 53 are all adhered with 1 mm thick lead plates to prevent X-ray leakage. The shell 52 is fixed to the bottom plate assembly 1 by pan head screws, the rear cover 51 is fixed to the shell 52 by pan head screws, and the front cover 53 is fixed to the bottom plate assembly 1 by pan head screws.

[0042] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A beam limiter for a C-arm X-ray machine, characterized in that: It comprises a bottom plate (11), a filter assembly (2), a main plate assembly (4), and a shell assembly (5), wherein the filter assembly (2) is mounted on the bottom plate (11), and the main plate assembly (4) is fixedly mounted on the bottom plate (11) using a double-through hexagonal stud (3); The filter assembly (2) comprises a filter gear (211) and a plurality of filter plates (212); the filter gear (211) is rotatably mounted on the bottom plate (11); a neutral opening (214) is provided on the filter gear (211); the materials and thicknesses of the plurality of filter plates (212) are different and they are fixedly mounted on the filter gear (211); a light inlet (15) is provided on the bottom plate (11); different filter plates (212) or neutral openings (214) can be aligned with the light inlet (15) by rotating the filter gear (211); The main board assembly (4) comprises a mounting plate (41) and two groups of light shielding parts, the two groups of light shielding parts are respectively mounted on the upper and lower sides of the mounting plate (41), the light shielding parts comprise an optical axis (43), a sliding seat (441), and a lead sheet (442), the optical axis (43) is fixedly mounted on the mounting plate (41) via an optical axis bracket (42), the sliding seats (441) are a pair and slide on the optical axis (43), and each of the sliding seats (441) is fixedly mounted with the lead sheet (442); The two pairs of slide seats (441) in the two groups of light-shielding parts are cross-arranged in a tic-tac-toe shape, and linkage parts are arranged on the mounting plates (41) located on one side of the two groups of light-shielding parts, and the positions of the slide seats (441) in the two groups of light-shielding parts are adjusted by the two groups of linkage parts.

2. A beam limiter for a C-arm X-ray machine according to claim 1, characterized in that: The linkage part comprises a synchronous pulley 1 (45), a synchronous pulley 2 (410), a long connecting plate assembly (47), a short connecting plate assembly (48), and a synchronous belt (49); the synchronous pulley 1 (45) is rotatably arranged on the mounting plate (41); the synchronous belt (49) is sleeved on the synchronous pulley 1 (45) and the synchronous pulley 2 (410); one end of the long connecting plate assembly (47) and the short connecting plate assembly (48) are respectively fixedly connected to two side edges of the synchronous belt (49); the other ends of the long connecting plate assembly (47) and the short connecting plate assembly (48) are respectively connected to a pair of slide seats (441).

3. A beam limiter for a C-arm X-ray machine according to claim 2, characterized in that: The mounting plate (41) is fixedly provided with a second stepper motor (411) and a third stepper motor (414), and the second synchronous pulleys (410) in the two sets of linkage parts are respectively connected to the driving ends of the second stepper motor (411) and the third stepper motor (414).

4. The beam limiter for a C-arm X-ray machine according to claim 1, characterized in that: A slot-type optical coupler (413) is fixedly arranged on the mounting plate (41) located at the other side of each group of the light-shielding portions, and an optical coupler baffle piece 1 (412) is fixedly mounted on one of the pair of slide seats (441); when the slide seat (441) moves, the optical coupler baffle piece 1 (412) can slide across the notch in the slot-type optical coupler (413).

5. The beam limiter for a C-arm X-ray machine according to claim 1, characterized in that: The filter assembly (2) further comprises a second optical coupling baffle (22) and an optical coupler (23); the second optical coupling baffle (22) is fixedly connected to the filter gear (211); the optical coupler (23) is fixed to the bottom plate (11); and when the filter gear (211) is rotated, the second optical coupling baffle (22) can slide through the optical coupling notch in the optical coupler (23).

6. A beam limiter for a C-arm X-ray machine according to any one of claims 1 or 5, characterized in that: A stepper motor 1 (241) is fixedly mounted on the bottom plate (11) via a motor bracket 1 (242); a filter motor gear (243) is fixedly mounted on the driving end of the stepper motor 1 (241); and the filter motor gear (243) is meshed with the filter gear (211).

7. The beam limiter for a C-arm X-ray machine according to claim 2, characterized in that: The long connecting plate assembly (47) comprises a long connecting plate (471), a clamping block (472), and a top block (473); the long connecting plate (471) is fixed to the clamping block (472) by countersunk screws, and the top block (473) is fixed to the clamping block (472) by pan head screws.

8. The beam limiter for a C-arm X-ray machine according to claim 2, characterized in that: The short connecting plate assembly (48) comprises a short connecting plate (481), a clamping block (472) and a top block (473). The short connecting plate (481) is fixed to the clamping block (472) by countersunk screws, and the top block (473) is fixed to the clamping block (472) by pan head screws.

9. The beam limiter for a C-arm X-ray machine according to claim 1, characterized in that: The shell assembly (5) comprises a rear cover (51), a shell (52) and a front cover (53). The inner walls of the rear cover (51), the shell (52) and the front cover (53) are all adhered with a 1 mm thick lead plate. The shell (52) is fixed to the bottom plate (11) by pan head screws, the rear cover (51) is fixed to the shell (52) by pan head screws, and the front cover (53) is fixed to the bottom plate assembly (1) by pan head screws.

10. The beam limiter for a C-arm X-ray machine according to claim 1, characterized in that: The bottom plate (11) is fixedly connected to a hanging plate (13), and the hanging plate (13) is fixedly connected to the bottom plate (11) via a connecting ring (12).

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