Radiation leakage testing device for testing shielding effect of accelerator

Abstract

The utility model relates to a radiation leakage testing device for testing the shielding effect of an accelerator. The radiation leakage testing device comprises a testing support assembly, an optical distance plate and a testing probe. The testing support assembly comprises an adjusting stand column and a horizontal supporting plate, a leveling plate is installed above the horizontal supporting plate through a plurality of leveling bolts, testing probe supports are symmetrically installed on the two sides of the upper surface of the leveling plate, and the light distance plate is vertically and detachably installed on the upper surface of the leveling plate. A reflecting groove is formed in the middle of the side face, back to the testing probe, of the light distance plate, a center point light source is installed in the reflecting groove, three point laser lamps are evenly distributed on the periphery of the center point light source on the side face of the light distance plate, and the three point laser lamps and the surface of the light distance plate are installed at a certain angle. The convergent point of laser beams emitted by the three point-shaped laser lamps is equal to the center line of the test probe in height, and the horizontal distance between the convergent point and the center line of the test probe is 1 m. According to the utility model, the accuracy and convenience of the light distance during testing are improved, the testing time is shortened, and the safety is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical device detection, in particular to a radiation leakage testing device for testing the shielding effect of an accelerator. Background Art

[0002] The helical tomotherapy system is equipped with a linear accelerator. According to the requirements of GB 9706.201-2020, it is necessary to test the X-radiation leakage outside the patient plane. In view of the radiation leakage test requirements of the accelerator, it is necessary to place a radiation probe at a distance of 1m from the center of the accelerator and at the same height as the center of the accelerator to collect the leakage charge and compare it with the maximum radiation at the center of the equipment.

[0003] The current method of testing for leaks is to manually adjust the height by placing ladders and foam, etc. For the 1m distance measurement from the accelerator, a 1m steel ruler is currently used for identification, and the radiation probe is placed directly on the foam.

[0004] Current technical deficiencies:

[0005] 1. Use a 1m steel ruler to measure the distance. Because the steel ruler itself is flexible, the operator needs to use an additional hard plate to ensure the level of the steel ruler, which can easily lead to inaccurate measurement and inconvenience in operation, and it takes too long, increasing the test time.

[0006] 2. Using ladders and foam matching heights is extremely unstable and requires the operator to check multiple times.

[0007] 3. The expensive test probe is placed directly on the foam, which is extremely unstable and requires additional fixation by the operator. At the same time, the matching acquisition cable will droop. If you are not careful, touching the cable will cause the probe to fall to the ground, causing the cost of the test tool to increase. Utility Model Content

[0008] The utility model aims to solve the deficiencies of the prior art and provides a radiation leakage testing device for testing the shielding effect of an accelerator.

[0009] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0010] A radiation leakage test device for testing the shielding effect of an accelerator, comprising a test bracket assembly, an optical distance plate and a test probe;

[0011] The test bracket assembly includes an adjustment column, a horizontal support plate is provided on the top of the adjustment column, an adjustment plate is installed above the horizontal support plate through a number of leveling bolts, test probe brackets are symmetrically installed on both sides of the upper surface of the adjustment plate, the test probes are mounted on the two test probe brackets, the optical distance plate is detachably installed on the upper surface of the adjustment plate, the optical distance plate is installed vertically to the upper surface of the adjustment plate, a reflection groove is provided in the middle position of the side of the optical distance plate facing away from the test probe, and a central point light source is installed in the reflection groove, the central point light source is arranged flush with the center line of the test probe, three point laser lights are evenly distributed on the side of the optical distance plate on the outer circumference of the central point light source, the three point laser lights are installed at a certain angle to the surface of the optical distance plate, the convergence point of the laser beams emitted by the three point laser lights is at the same height as the center line of the test probe and the horizontal distance from the center line of the test probe is 1m.

[0012] An extension plate is arranged on the upper surface of the leveling plate, a slide groove is arranged on the upper surface of the extension plate, and a U-shaped cover plate is arranged on the extension plate above the slide groove.

[0013] A vertical plate is arranged at the lower end of the optical distance plate, a horizontal plug plate is arranged at the bottom of the vertical plate, and the horizontal plug plate is inserted in a slide groove below the cover plate.

[0014] The test probe bracket comprises a horizontal beam, oblique beams are arranged between the two ends of the bottom of the horizontal beam and the adjustment plate, an arc-shaped slot is arranged on the top of the horizontal beam, and the test probe is arranged between the arc-shaped slots of the two test probe brackets.

[0015] A central limiting column is arranged on the top of the horizontal supporting plate, and the central limiting column is passed through the adjusting plate.

[0016] The adjusting column comprises a plurality of adjusting cylinders which are connected in sequence from top to bottom, and adjacent adjusting cylinders are connected by threads.

[0017] The beneficial effects of the utility model are as follows: the utility model improves the accuracy and convenience of the optical distance during the test, shortens the test time, and improves the safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the test bracket assembly;

[0020] Figure 3 It is a structural schematic diagram of the optical distance board;

[0021] Figure 4 is a schematic diagram of a calibration ruler;

[0022] Figure 5 It is a schematic diagram of the first situation when calibrating the calibration ruler;

[0023] Figure 6It is a schematic diagram of the second situation when calibrating the calibration ruler;

[0024] Figure 7 It is a schematic diagram of the third situation when calibrating the calibration ruler;

[0025] Figure 8 It is a schematic diagram of the fourth situation when calibrating the calibration ruler;

[0026] In the figure: 1-test bracket assembly; 2-light distance board; 3-test probe; 4-reflection slot; 5-center point light source; 6-point laser light;

[0027] 101-adjusting column; 102-horizontal support plate; 103-leveling bolt; 104-leveling plate; 105-test probe bracket; 106-extension plate; 107-slideway; 108-U-shaped cover plate; 109-center limit column;

[0028] 201-vertical board; 202-horizontal plug board;

[0029] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0034] A radiation leakage test device for testing the shielding effect of an accelerator, such as Figure 1 As shown, it includes a test bracket assembly 1, an optical distance board 2, a test probe 3, a reflection groove 4, a central point light source 5 and a point laser light 6.

[0035] Test bracket assembly 1 Figure 2 As shown, it includes an adjusting column 101, a horizontal supporting plate 102 is provided on the top of the adjusting column 101, an adjusting plate 104 is installed above the horizontal supporting plate 102 through a plurality of leveling bolts 103, test probe brackets 105 are symmetrically installed on both sides of the upper surface of the adjusting plate 104, an extension plate 106 is provided on the upper surface of the adjusting plate 104, a slide groove 107 is opened on the upper surface of the extension plate 106, a U-shaped cover plate 108 is provided on the extension plate 106 above the slide groove 107, a center limiting column 109 is provided on the top of the horizontal supporting plate 102, and the center limiting column 109 is penetrated on the adjusting plate 104.

[0036] The test probe 3 is mounted on two test probe brackets 105 , and the optical distance plate 2 is detachably mounted on the upper surface of the adjustment plate 104 , and the optical distance plate 2 is vertically mounted to the upper surface of the adjustment plate 104 .

[0037] The test probe bracket 105 comprises a horizontal beam, with inclined beams arranged between the two ends of the bottom of the horizontal beam and the adjustment plate 104 , and an arc-shaped slot arranged on the top of the horizontal beam. The test probe 3 is mounted between the arc-shaped slots of the two test probe brackets 105 .

[0038] The adjustment column 101 includes a plurality of adjustment cylinders connected in sequence from top to bottom, and adjacent adjustment cylinders are connected via threads.

[0039] like Figure 3 As shown, a reflection groove 4 is provided in the middle position of the side surface of the optical distance plate 2 facing away from the test probe 3, and a central point light source 5 is installed in the reflection groove 4. The central point light source 5 is arranged flush with the center line of the test probe 3, and three point laser lamps 6 are evenly distributed on the side surface of the optical distance plate 2 on the outer circumference of the central point light source 5. The three point laser lamps 6 are installed at a certain angle to the surface of the optical distance plate 2, and the convergence point of the laser beams emitted by the three point laser lamps 6 is at the same height as the center line of the test probe 3 and the horizontal distance from the center line of the test probe 3 is 1m.

[0040] A vertical plate 201 is provided at the lower end of the optical distance plate 2 , a horizontal plug plate 202 is provided at the bottom of the vertical plate 201 , and the horizontal plug plate 202 is inserted into the slide groove 107 below the cover plate 108 .

[0041] The utility model needs to be used when in use Figure 4 Calibrate the calibration scale shown in the figure and make sure it meets the requirements before testing.

[0042] The optical distance plate 2 is designed with three fixed-angle point laser lights 6 to determine the optical distance to be 1 m, and a central point light source 5 to determine the verticality of the optical distance plate 2 .

[0043] The positions of the three point-shaped laser lights 6 are fixed and installed according to the design angle.

[0044] The central point light source 5 is a parabolic surface, and the central point light source 5 is installed at the focus of the parabola, and circular parallel light is generated by reflection without deformation due to distance.

[0045] When the calibration scale projection surface appears Figure 5 When shown, it means the light distance is 1m and vertical.

[0046] When the calibration scale projection surface appears Figure 6 When shown, it means the light distance is 1m, but not vertical.

[0047] When the calibration scale projection surface appears Figure 7 When shown, it means that the light distance is not 1m, but vertical.

[0048] When the calibration scale projection surface appears Figure 8 When shown, it means that the light distance is not 1m and is not vertical.

[0049] Only when Figure 5 In the case shown, it is proved that the device is installed in place and can be tested. Otherwise, it is necessary to adjust the level of the adjustment plate 104 and the position of the optical distance plate 2.

[0050] The utility model improves the accuracy and convenience of the optical distance during the test, shortens the test time and improves the safety.

[0051] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A radiation leakage test device for testing the shielding effect of an accelerator, characterized in that: It comprises a test bracket assembly (1), an optical distance plate (2) and a test probe (3); The test bracket assembly (1) comprises an adjustment column (101), a horizontal support plate (102) is arranged on the top of the adjustment column (101), an adjustment plate (104) is installed above the horizontal support plate (102) via a plurality of leveling bolts (103), test probe brackets (105) are symmetrically installed on both sides of the upper surface of the adjustment plate (104), the test probe (3) is mounted on the two test probe brackets (105), the optical distance plate (2) is detachably installed on the upper surface of the adjustment plate (104), the optical distance plate (2) is vertically installed on the upper surface of the adjustment plate (104), and the optical distance plate (104) is vertically installed on the upper surface of the adjustment plate (104). 2) A reflection groove (4) is provided in the middle of the side facing away from the test probe (3), and a central point light source (5) is installed in the reflection groove (4), the central point light source (5) is arranged flush with the center line of the test probe (3), three point laser lights (6) are evenly distributed on the side of the optical distance plate (2) on the outer circumference of the central point light source (5), the three point laser lights (6) are installed at a certain angle to the surface of the optical distance plate (2), and the convergence point of the laser beams emitted by the three point laser lights (6) is at the same height as the center line of the test probe (3) and the horizontal distance from the center line of the test probe (3) is 1m.

2. A radiation leakage test device for testing the shielding effect of an accelerator according to claim 1, characterized in that: An extension plate (106) is provided on the upper surface of the leveling plate (104), a slide groove (107) is provided on the upper surface of the extension plate (106), and a U-shaped cover plate (108) is provided on the extension plate (106) above the slide groove (107).

3. A radiation leakage testing device for testing the shielding effect of an accelerator according to claim 2, characterized in that: A vertical plate (201) is provided at the lower end of the optical distance plate (2), a horizontal plug plate (202) is provided at the bottom of the vertical plate (201), and the horizontal plug plate (202) is inserted into a slide groove (107) below the cover plate (108).

4. A radiation leakage testing device for testing the shielding effect of an accelerator according to claim 3, characterized in that: The test probe bracket (105) comprises a horizontal beam, oblique beams are provided between the two ends of the bottom of the horizontal beam and the adjustment plate (104), an arc-shaped slot is provided on the top of the horizontal beam, and the test probe (3) is mounted between the arc-shaped slots of two test probe brackets (105).

5. A radiation leakage testing device for testing the shielding effect of an accelerator according to claim 4, characterized in that: A central limiting column (109) is provided on the top of the horizontal supporting plate (102), and the central limiting column (109) is passed through the leveling plate (104).

6. A radiation leakage testing device for testing the shielding effect of an accelerator according to claim 5, characterized in that: The adjustment column (101) comprises a plurality of adjustment cylinders connected in sequence from top to bottom, and adjacent adjustment cylinders are connected via threads.

Images