X-ray filtering device

Abstract

The present invention belongs to the technical field of devices for assisting beam limiters in filtering X-rays, and specifically relates to an X-ray filtering device, including a driving component, a return component, a plurality of parallel mounting plate components, and filters of different filtering levels with the same number of mounting plate components, each filter being movably mounted on a mounting plate component, and the driving component drives the plurality of filters to move to filtering positions in sequence to achieve filtering of different levels of X-rays, and the return component is used to return the plurality of filters to non-filtering positions in sequence. The device absorbs soft rays with a longer wavelength of primary X-rays, improves the quality of perspective imaging, and reduces harm to the human body.

Description

Technical Field

[0001] The invention belongs to the technical field of devices for assisting a beam limiter in filtering X-rays, and in particular relates to an X-ray filtering device. Background Art

[0002] X-rays are widely used in medicine because of their penetrating effects, differential absorption, photosensitivity and fluorescence. When X-rays pass through different parts of the human body, the extent to which X-rays are absorbed by different parts of the human body is different, so the amount of X-rays passing through different parts of the human body is also different, resulting in a large difference in the intensity of the fluorescence or photosensitivity produced on the fluorescent screen or photographic film, which can then display shadows representing different densities, and provide medical personnel with a basis for diagnosis by imaging on the film. However, there are soft rays in X-rays that are harmful to the human body. In order to protect the health of patients, a beam limiter is usually set in the X-ray machine to adjust the size of the human body detection part and filter the soft rays. Usually, a filter is set inside the beam limiter to filter the soft rays. Among them, when the beam limiter responds to different filtering requirements, filters of different thicknesses are needed to filter different amounts of soft rays, so the filters need to be replaced. For example, compared with the detection of adults, thicker filters are needed for the detection of young children. At present, the mainstream choice of traditional beam limiters is to replace the filter through gear transmission, electromagnet transmission, electric control sliding and other methods. The replacement response speed is slow, it occupies a large space, there is noise, and affects the treatment environment. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an X-ray filtering device, which is used in a beam limiter device to absorb soft rays with longer wavelengths of primary X-rays to reduce harm to the human body.

[0004] The present invention is implemented in this way. It provides an X-ray filtering device, including a driving component, a return component, a plurality of parallel mounted plate components and filters of different filtering levels, the number of which is the same as the number of the mounted plate components. Each filter is movably mounted on a mounting plate component. The driving component drives the plurality of filters to move to filtering positions in sequence to achieve filtering of different levels of X-rays. The return component causes the plurality of filters to return to non-filtering positions in sequence.

[0005] Preferably, the mounting plate assemblies include three, namely the first mounting plate assembly, the second mounting plate assembly and the third mounting plate assembly, the filter plates include three, namely the first filter plate, the second filter plate and the third filter plate, the first mounting plate assembly includes a first mounting plate, a first guide rail is fixed to the upper edge of the first mounting plate, a first slider is slidably connected to the first guide rail, and the first slider is connected to the first filter plate, the second mounting plate assembly includes a second mounting plate, a second guide rail is fixed to the upper edge of the second mounting plate, a second slider is slidably connected to the second guide rail, and the second slider is connected to the second filter plate, the third mounting plate assembly includes a third mounting plate, a third guide rail is fixed to the upper edge of the third mounting plate, a third slider is slidably connected to the third guide rail, and the third slider is connected to the third filter plate.

[0006] Further preferably, the driving assembly includes a paddle wheel, the paddle wheel includes a paddle wheel shaft, a first sector gear, a second sector gear and a third sector gear, the paddle wheel shaft passes through the first mounting plate, the second mounting plate and the third mounting plate in sequence, from the radial perspective of the paddle wheel shaft, the three sector gears are evenly distributed on the paddle wheel shaft and the central angles of the three sector gears are equal and the sum is less than 360°, and there is a certain distance between two adjacent sector gears; the lower ends of the first slider, the second slider and the third slider are respectively provided with racks that can mesh with the first sector gear, the second sector gear and the third sector gear.

[0007] Further preferably, the drive assembly also includes a motor, a driving pulley, a driven pulley and a synchronous belt, the motor is connected to the driving pulley, the synchronous belt is sleeved on the driving pulley and the driven pulley, and the axle of the driven pulley is fixedly connected to the paddle wheel shaft to drive the paddle wheel to rotate.

[0008] Further preferably, a first large stopper and a first small stopper are fixed at both ends of the first guide rail, a second large stopper and a second small stopper are fixed at both ends of the second guide rail, and a third large stopper and a third small stopper are fixed at both ends of the third guide rail, for respectively limiting the sliding ranges of the first slider, the second slider, and the third slider.

[0009] Further preferably, the return assembly includes a first tension spring, a second tension spring, and a third tension spring, one end of the first tension spring is connected to one end of the first mounting plate, and the other end is connected to the first slider, one end of the second tension spring is connected to one end of the second mounting plate, and the other end is connected to the second slider, and one end of the third tension spring is intercepted at one end of the third mounting plate, and the other end is connected to the third slider.

[0010] Further preferably, it also includes a limit circuit board and a reset circuit board, the limit circuit board is provided with a first limit sensor, a second limit sensor and a third limit sensor, which are respectively used to sense whether the first filter, the second filter and the third filter are in the filtering position and send signals at the same time, and the reset circuit board is provided with a first reset sensor, a second reset sensor and a third reset sensor, which are respectively used to sense whether the first filter, the second filter and the third filter are in the non-filtering position and send signals at the same time.

[0011] Further preferably, it also includes at least four connecting blocks and at least two mounting seats, the connecting blocks are used to connect the first mounting plate, the second mounting plate and the third mounting plate into a whole, and the mounting seats are used to install the X-ray filtering device in the beam limiter.

[0012] Further preferably, the thicknesses of the first filter plate, the second filter plate and the third filter plate are 0.1 mm, 0.2 mm and 0.3 mm respectively.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] 1. Guided by rails and returned by springs, the three-layer filter slides along the rails, with small movement resistance, fast response speed and short return time;

[0015] 2. Closed-loop control of the filter position. The sensor recognizes the signal and feeds it back to the motor control system, which then controls the motor to drive the corresponding filter to the specified position.

[0016] 3. The three layers of filters are arranged in parallel, with small thickness and high imaging quality;

[0017] 4. The filter and the drive assembly are separated from each other, which is convenient for installation in the beam limiter;

[0018] 5. The driving structure adopts gear rack intermittent transmission, and the transmission is stable and reliable;

[0019] 6. When changing the filter layers, the motor rotates continuously, and there is no need to switch the direction to switch the filter layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure diagram of the X-ray filtering device provided by the present invention;

[0021] Figure 2 This is an overall structural diagram of the X-ray filtering device provided by the present invention from another angle;

[0022] Figure 3 A top view of the X-ray filtering device provided by the present invention;

[0023] Figure 4 A front view of the X-ray filtering device provided by the present invention;

[0024] Figure 5 is a structural diagram of a first mounting plate assembly;

[0025] Figure 6 is a structural diagram of a second mounting plate assembly;

[0026] Figure 7 is a structural diagram of the third mounting plate assembly;

[0027] Figure 8 The overall structure diagram of the thumbwheel;

[0028] Fig. 9 This is the overall structure diagram of the dial from another perspective;

[0029] Fig.10 This is the structure diagram of the radial viewing angle dial;

[0030] Fig.11 A diagram showing the position of the X-ray filter device provided by the present invention in the beam limiter. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 In order to minimize the harm of soft rays with longer wavelengths in X-rays to the human body, the present invention provides an X-ray filtering device, including a driving component, a return component, a plurality of parallel mounting plate components, and filters of different filtering levels, the number of which is the same as the number of mounting plate components. Each filter is movably mounted on a mounting plate component, and the driving component drives the plurality of filters to move to filtering positions in sequence to achieve filtering of different levels of X-rays. The return component is used to return the plurality of filters to non-filtering positions in sequence.

[0033] refer to Figure 1 , Figure 5 , Figure 6 and Figure 7In this embodiment, the mounting plate assembly includes three, namely, a first mounting plate assembly 1, a second mounting plate assembly 2 and a third mounting plate assembly 3, the filter includes three parallel arranged, namely, a first filter 12, a second filter 11 and a third filter 10, the first mounting plate assembly 1 includes a first mounting plate 101, a first guide rail 102 is fixed to the upper edge of the first mounting plate 101, a first slider 103 is slidably connected to the first guide rail 102, and the first slider 103 is connected to the first filter 12, the second mounting plate assembly 2 includes a second mounting plate 201, a second guide rail 202 is fixed to the upper edge of the second mounting plate 201, a second slider 203 is slidably connected to the second guide rail 202, and the second slider 203 is connected to the second filter 11, the third mounting plate assembly 3 includes a third mounting plate 301, a third guide rail 302 is fixed to the upper edge of the third mounting plate 301, a third slider 303 is slidably connected to the third guide rail 302, and the third slider 303 is connected to the third filter 10.

[0034] refer to Fig.11 When the filtering device is used for soft ray filtering, the driving assembly drives the first slider 103, the second slider 203 and the third slider 303 to carry the first filter 12, the second filter 11 and the third filter 10 to move from the non-filtering position to the filtering position in sequence. According to the filtering requirements, it can be selected not to filter or to filter at different levels. After filtering is not required, the return assembly pulls the first filter 12, the second filter 11 and the third filter 10 back to the non-filtering position. Due to the parallel installation, in order to prevent the three filters from interfering with each other, as an improvement, a nylon pad 16 is added between the filter and the slider to raise the height.

[0035] As a specific driving method, refer to Figure 8 , Fig. 9 and Fig.10 The driving component includes a paddle wheel 5, which includes a paddle wheel shaft 501, a first sector gear 502, a second sector gear 503 and a third sector gear 504. The paddle wheel shaft 501 passes through the first mounting plate 101, the second mounting plate 201 and the third mounting plate 301 in sequence. From the radial perspective of the paddle wheel shaft 501, the three sector gears are evenly distributed on the paddle wheel shaft 501 and the central angles of the three sector gears are equal and the sum is less than 360°. There is a certain distance between two adjacent sector gears. The lower ends of the first slider 103, the second slider 203 and the third slider 303 are respectively provided with racks that can mesh with the first sector gear 502, the second sector gear 503 and the third sector gear 504.

[0036] During operation, the dial wheel 5 rotates counterclockwise, first driving the first filter plate 12 to move from the non-filtering position to the filtering position through the first sector gear 502. Due to the continuous rotation of the dial wheel 5, when the first sector gear 502 disengages from the rack under the first slider 103, the first filter plate 12 returns to the non-filtering position driven by the return assembly, and then the second sector gear 503 drives the second filter plate 11 to move from the non-filtering position to the filtering position. Due to the continuous rotation of the dial wheel 5, when the second sector gear 503 disengages from the rack under the second slider 203, the second filter plate 11 returns to the non-filtering position driven by the return assembly, and then the third sector gear 504 drives the third filter plate 10 to move from the non-filtering position to the filtering position. Due to the continuous rotation of the dial wheel 5, when the third sector gear 504 disengages from the rack under the third slider 303, the third filter plate 10 returns to the non-filtering position driven by the return assembly.

[0037] Specifically, the driving assembly further includes a motor 4, a driving pulley 6, a driven pulley 7 and a synchronous belt 18. The motor 4 is connected to the driving pulley 6. The synchronous belt 18 is sleeved on the driving pulley 6 and the driven pulley 7. The axle of the driven pulley 7 is fixedly connected to the paddle wheel shaft 501 to drive the paddle wheel 5 to rotate. The first mounting plate 101 is also provided with an extended section 106 for connecting the motor 4.

[0038] After the motor 4 is started, it drives the driving pulley 6 and the driven pulley 7 to rotate, and the driven pulley 7 drives the dial wheel to rotate.

[0039] In order to prevent the filter from escaping from the range of motion, as an improvement, the first guide rail 102 is respectively fixed with a first large stopper 104 and a first small stopper 105 at both ends, the second guide rail 202 is respectively fixed with a second large stopper 204 and a second small stopper 205 at both ends, and the third guide rail 302 is respectively fixed with a third large stopper 304 and a third small stopper 305 at both ends, which are used to limit the sliding range of the first slider 103, the second slider 203, and the third slider 303, respectively.

[0040] Specifically, the return assembly includes a first tension spring 17, a second tension spring 19, and a third tension spring 15. One end of the first tension spring 17 is connected to one end of the first mounting plate 101, and the other end is connected to the first slider 103. One end of the second tension spring 19 is connected to one end of the second mounting plate 201, and the other end is connected to the second slider 203. One end of the third tension spring 15 is intercepted at one end of the third mounting plate 301, and the other end is connected to the third slider 303.

[0041] When the filter needs to be returned from the filtering position to the non-filtering position, the rack has been separated from the dial wheel 5, and the tension spring pulls it back under the action of tension.

[0042] In order to realize intelligent control, as an improvement, it also includes a limit circuit board 8 and a reset circuit board 9. The limit circuit board 8 is provided with a first limit sensor 801, a second limit sensor 802 and a third limit sensor 803, which are respectively used to sense whether the first filter 12, the second filter 11 and the third filter 10 send signals at the same time in the filtering position; the reset circuit board 9 is provided with a first reset sensor 901, a second reset sensor 902 and a third reset sensor 903, which are respectively used to sense whether the first filter 12, the second filter 11 and the third filter 10 send signals at the same time in the non-filtering position.

[0043] Driven by motor 4, when the filter layer is 0, the first reset sensor 901, the second reset sensor 902 and the third reset sensor 903 send signals; when the filter layer becomes the first filter 12, the first limit sensor 801, the second reset sensor 902 and the third reset sensor 903 send signals; when the filter layer becomes the second filter 11, the second limit sensor 802 and the first reset sensor 901 and the third reset sensor 903 send signals; when the filter layer becomes the third filter 10, the third limit sensor 803 and the first reset sensor 901 and the second reset sensor 902 send signals.

[0044] In order to facilitate connection and installation, as an improvement, it also includes at least four connecting blocks 14 and at least two mounting seats 13. The connecting blocks 14 are used to connect the first mounting plate 101, the second mounting plate 201 and the third mounting plate 301 into a whole, and the mounting seats 13 are used to install the X-ray filtering device in the beam limiter.

[0045] Preferably, the thicknesses of the first filter plate 12, the second filter plate 11 and the third filter plate 10 are 0.1 mm, 0.2 mm and 0.3 mm respectively.

Claims

1. An X-ray filtering device, characterized in that: It comprises a driving assembly, a return assembly, a plurality of parallel mounted plate assemblies and filters of different filtering levels, the number of which is the same as that of the mounted plate assemblies. Each filter is movably mounted on a mounted plate assembly. The driving assembly drives the plurality of filters to move to filtering positions in sequence to achieve filtering of different levels of X-rays. The return assembly enables the plurality of filters to return to non-filtering positions in sequence. The mounting plate assembly comprises three, namely a first mounting plate assembly (1), a second mounting plate assembly (2) and a third mounting plate assembly (3); the filter disc comprises three, namely a first filter disc (12), a second filter disc (11) and a third filter disc (10); the first mounting plate assembly (1) comprises a first mounting plate (101); a first guide rail (102) is fixed to the upper edge of the first mounting plate (101); a first slider (103) is slidably connected to the first guide rail (102); the first slider (103) is connected to the first filter disc (12); and the second The mounting plate assembly (2) comprises a second mounting plate (201), a second guide rail (202) being fixed on the upper edge of the second mounting plate (201), a second slider (203) being slidably connected to the second guide rail (202), and the second slider (203) being connected to the second filter plate (11); the third mounting plate assembly (3) comprises a third mounting plate (301), a third guide rail (302) being fixed on the upper edge of the third mounting plate (301), a third slider (303) being slidably connected to the third guide rail (302), and the third slider (303) being connected to the third filter plate (10); The driving assembly comprises a dial wheel (5), the dial wheel (5) comprising a dial wheel shaft (501), a first sector gear (502), a second sector gear (503) and a third sector gear (504), the dial wheel shaft (501) sequentially passes through the first mounting plate (101), the second mounting plate (201) and the third mounting plate (301), from a radial perspective of the dial wheel shaft (501), the three sector gears are evenly distributed on the dial wheel shaft (501), the central angles of the three sector gears are equal, and the sum of the three sector gears is less than 360 degrees, and in the axial direction of the dial wheel shaft, there is a certain distance between two adjacent sector gears; the lower ends of the first slider (103), the second slider (203) and the third slider (303) are respectively provided with racks that can mesh with the first sector gear (502), the second sector gear (503) and the third sector gear (504).

2. The X-ray filtering device according to claim 1, characterized in that: The driving assembly further comprises a motor (4), a driving pulley (6), a driven pulley (7) and a synchronous belt (18); the motor (4) is connected to the driving pulley (6); the synchronous belt (18) is sleeved on the driving pulley (6) and the driven pulley (7); the axle of the driven pulley (7) is fixedly connected to the thumbwheel shaft (501) to drive the thumbwheel (5) to rotate.

3. The X-ray filtering device according to claim 1, characterized in that: A first large stopper (104) and a first small stopper (105) are fixed at both ends of the first guide rail (102), a second large stopper (204) and a second small stopper (205) are fixed at both ends of the second guide rail (202), and a third large stopper (304) and a third small stopper (305) are fixed at both ends of the third guide rail (302), respectively, for limiting the sliding ranges of the first slider (103), the second slider (203), and the third slider (303), respectively.

4. The X-ray filtering device according to claim 1, characterized in that: The return assembly comprises a first tension spring (17), a second tension spring (19), and a third tension spring (15); one end of the first tension spring (17) is connected to one end of the first mounting plate (101), and the other end is connected to the first slider (103); one end of the second tension spring (19) is connected to one end of the second mounting plate (201), and the other end is connected to the second slider (203); one end of the third tension spring (15) is connected to one end of the third mounting plate (301), and the other end is connected to the third slider (303).

5. The X-ray filtering device according to claim 1, characterized in that: The invention also comprises a limit circuit board (8) and a reset circuit board (9). The limit circuit board (8) is provided with a first limit sensor (801), a second limit sensor (802) and a third limit sensor (803), which are respectively used to sense whether the first filter (12), the second filter (11) and the third filter (10) are in the filtering position and send signals at the same time. The reset circuit board (9) is provided with a first reset sensor (901), a second reset sensor (902) and a third reset sensor (903), which are respectively used to sense whether the first filter (12), the second filter (11) and the third filter (10) are in the non-filtering position and send signals at the same time.

6. The X-ray filtering device according to claim 1, characterized in that: It also comprises at least four connection blocks (14) and at least two mounting seats (13), wherein the connection blocks (14) are used to connect the first mounting plate (101), the second mounting plate (201) and the third mounting plate (301) together to form a whole, and the mounting seats (13) are used to install the X-ray filter device in the beam limiter.

7. The X-ray filtering device according to claim 1, characterized in that: The thicknesses of the first filter plate (12), the second filter plate (11) and the third filter plate (10) are 0.1 mm, 0.2 mm and 0.3 mm respectively.

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