Polyethylene stepped hole image quality indicator

Abstract

The utility model belongs to the technical field of ray detection, and particularly relates to a polyethylene stepped hole image quality indicator. Comprising a module supporting frame, a module containing groove, a module and an adjusting mechanism, and the module supporting frame is in a regular polygon shape; the module placing grooves are uniformly distributed around the center of the hole type image quality indicator; the module placing groove is in sliding connection with the module supporting frame through the sliding groove; the module is placed in the module placing groove; the module containing grooves are slidably connected with the inner walls of the adjusting mechanisms through guide sliding blocks, the number of the adjusting mechanisms is equal to that of the module containing grooves, spiral lead screws are arranged in the adjusting mechanisms, the spiral lead screws penetrate through the guide sliding blocks, and the spiral lead screws are slidably connected with the guide sliding blocks through threads. The polyethylene stepped hole image quality indicator provided by the utility model is strong in applicability, and the height difference between adjacent modules is convenient to adjust.

Description

Technical Field

[0001] The utility model belongs to the technical field of ray detection, and in particular relates to a polyethylene step hole image quality meter. Background Art

[0002] In order to facilitate the quantitative evaluation of radiographic sensitivity, artificial structures such as metal wires, holes, and slots that have a certain percentage relationship with the inspected workpiece or weld are often used to form the so-called image quality meter. The image quality meter (image quality indicator, penetrometer) is a device for measuring the radiographic sensitivity of radiographs. According to the image of the image quality meter displayed on the film, the quality of the film image can be judged, and the transillumination technology, film darkroom processing, defect detection capability, etc. can be evaluated.

[0003] At present, there are three main types of image quality meters that are most widely used: wire-type image quality meters, step-hole-type image quality meters, and flat-plate-type image quality meters. In addition, there are slot-type image quality meters and double-wire image quality meters. Various image quality meters have designed their own specific structures and details, and have stipulated their own methods for measuring radiographic sensitivity. The step-hole-type image quality meter is made by machining a hole with a diameter equal to the step thickness on a step test block made of the same or similar material as the workpiece being inspected. Due to the different materials and thicknesses of the workpieces, different types of image quality meters need to be selected, which makes the image quality meter inconvenient to use.

[0004] The prior art discloses a stepped hole type image quality meter (2017203923652), which includes a plurality of module placement slots and a plurality of stepped modules, and the plurality of stepped modules can be partially or completely placed in the module placement slots. According to the material and thickness of the workpiece, a suitable stepped module is selected and placed in the module placement slot to form a stepped hole type image quality meter to measure the radiographic sensitivity of the radiograph. Only a certain number of stepped modules are required to form an image quality meter module system, and there is no need to purchase different models of image quality meters to adapt to workpieces of different materials and thicknesses, which saves costs and has high flexibility.

[0005] However, when this type of image quality meter is used to detect X-ray photographic films obtained with the aid of a step-hole image quality meter, the image quality meter's imaging result is: on a white background, there are several circular hole images of different grayscales. The image of the workpiece being measured on the film is also a white background, and the defects appear as areas of different grayscales. It can be seen that the step-hole image quality meter is consistent with the measured imaging background, which can avoid observation errors caused by different background colors. By comparing the optical density at the circular holes of the image quality meter with different step grayscales with the optical density at the defect on the workpiece being measured, and then based on the corresponding relationship between the optical density on the image quality meter and the thickness of the image quality meter base plate, the thickness of the defect can be obtained.

[0006] In order to complete the above work, it is necessary to determine the height difference of the step module at the beginning of the design. If you want to adjust the height difference between two adjacent step holes, you need to set a metal plate at the bottom of the step hole. Therefore, it will cause the height difference between two adjacent step holes to be adjusted. It is more troublesome to adjust the height difference between two adjacent step holes, which also leads to poor practicality of the entire device.

[0007] To this end, we propose a polyethylene step hole image quality meter. Utility Model Content

[0008] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a polyethylene step hole image quality meter to solve the problem of poor practical performance of the step hole image quality meter in the prior art.

[0009] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0010] A polyethylene stepped hole image quality meter comprises a module support frame, a module placement slot, a module and an adjustment mechanism, wherein the module support frame is in the shape of a regular hexagon; six module placement slots are evenly distributed around the center of the hole-type image quality meter; the module placement slot is slidably connected to the module support frame through a slide slot; the module is placed in the module placement slot; the module placement slot is slidably connected to the inner wall of the adjustment mechanism through a guide slider, the number of the adjustment mechanism is equal to the number of the module placement slots, a spiral screw is arranged in the adjustment mechanism, the spiral screw passes through the guide slider, and the spiral screw is slidably connected to the guide slider through a thread.

[0011] Furthermore, in order to facilitate the removal of the module, a convenient hole for taking the step module is provided at the center of the stepped hole type image quality meter, and the module is provided with several stepped holes of different sizes.

[0012] Furthermore, in order to improve the service life of the adjustment mechanism, a sleeve is provided at the connection between the guide slider and the spiral screw, an internal thread is provided on the inner side of the sleeve, and the sleeve is threadedly connected to the spiral screw.

[0013] Furthermore, in order to facilitate the rotation of the spiral screw, anti-slip grooves are provided on the bottom of the spiral screw.

[0014] Furthermore, in order to measure the moving height of the module placement slot, a pointer is provided on the sleeve away from the module support frame. The pointer passes through the side wall of the height adjustment mechanism. The upper surface of the adjustment mechanism is provided with a scale, and the scale is located directly below the pointer.

[0015] Furthermore, the minimum measurement unit of the scale is 0.1 mm.

[0016] In summary, due to the adoption of the above technical solution, the beneficial technical effects of the utility model are:

[0017] A polyethylene stepped hole image quality meter module placement slot is slidably connected to the inner wall of the adjustment mechanism through a guide slider. The number of adjustment mechanisms is equal to the number of module placement slots. A spiral screw is provided in the adjustment mechanism, which passes through the guide slider and is slidably connected to the guide slider through a thread. When adjusting the height difference between two adjacent module placement slots, the spiral screw is rotated to drive the module placement slot to move through the guide slider to adjust the height difference between the two adjacent modules. The adjustment mechanism avoids the need to set a metal sheet at the bottom of the stepped hole during the detection process, and the adjustment mechanism can be directly adjusted, thereby improving the practicality of the entire device.

[0018] A polyethylene step hole image quality meter, a pointer is provided on the side of the metal sleeve away from the module support frame, the pointer penetrates the side wall of the adjustment mechanism, and a scale is provided on the surface of the adjustment mechanism below the pointer, and the minimum measurement unit of the scale is mm. The height of the module placement slot movement can be quantified through the cooperation of the adjustment mechanism and the scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model.

[0020] Figure 2 For this utility model Figure 1 Top view of the .

[0021] Figure 3 For this utility model Figure 2 Schematic diagram of the cross section along the AA direction.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.

[0023] In the figure: module support frame 1, module placement slot 2, module 3, adjustment mechanism 4, slide slot 5, scale 6, handy hole 7, metal sleeve 8, pointer 9, guide slider 10, spiral screw 11, anti-slip pattern 12. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model content, and are not used to limit the utility model content.

[0025] Example 1

[0026] In this embodiment, Figure 1-4As shown, a polyethylene stepped hole image quality meter comprises a module support frame 1, a module placement slot 2, a module 3 and an adjustment mechanism 4, wherein the module support frame 1 is in the shape of a regular hexagon; 6 module placement slots 2 are evenly distributed around the center of the hole-type image quality meter; the module placement slot 2 is slidably connected to the module support frame 1 through a slide slot 5; the module 3 is placed in the module placement slot 2; the module placement slot 2 is slidably connected to the inner wall of the adjustment mechanism 4 through a guide slider 10, the number of the adjustment mechanisms 4 is equal to the number of the module placement slots 2, and a spiral screw 11 is provided in the adjustment mechanism 4, the spiral screw 11 passes through the guide slider 10, and the spiral screw 11 is slidably connected to the guide slider 10 through a thread, when adjusting the height difference between two adjacent module placement slots 2, the height difference between two adjacent modules 3 can be adjusted by rotating the spiral screw 11 to drive the module placement slot 2 to move through the guide slider 10.

[0027] In order to facilitate taking the module 3, a convenient hole 7 for taking the stepped module is provided in the center of the stepped hole type image quality meter, and the module 3 is provided with several stepped holes of different sizes.

[0028] In order to improve the service life of the adjustment mechanism 4 , a metal sleeve 8 is provided at the connection between the guide slider 10 and the spiral screw 11 . An internal thread is provided inside the metal sleeve 8 , and the metal sleeve 8 is threadedly connected to the spiral screw 11 .

[0029] In order to facilitate the rotation of the spiral screw 11 , an anti-slip pattern 12 is provided at the bottom of the spiral screw 11 .

[0030] Example 2

[0031] In this embodiment, Figure 1-4 As shown, a polyethylene step hole image quality meter, in order to measure the moving height of the module placement slot 2, a pointer 9 is provided on the metal sleeve 8 away from the module support frame 1, and the pointer 9 penetrates the side wall of the adjustment mechanism 4. The upper surface of the adjustment mechanism 4 is provided with a scale 6, and the scale 6 is located directly below the pointer 9. Among them, the minimum measurement unit of the scale 6 is 0.1mm. The height of the module placement slot 2 can be quantified through the scale 6.

[0032] The above description is a preferred embodiment of the utility model content and is not intended to limit the utility model content. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model content should be included in the protection scope of the utility model content.

Claims

1. A polyethylene step hole image quality meter, characterized in that: The invention comprises a module support frame (1), a module placement slot (2), a module (3) and an adjustment mechanism (4), wherein the module support frame (1) is in the shape of a regular hexagon; six module placement slots (2) are evenly distributed around the center of the hole-type image quality meter; the module placement slot (2) is slidably connected to the module support frame (1) via a slide slot (5); the module (3) is placed in the module placement slot (2); the module placement slot (2) is slidably connected to the inner wall of the adjustment mechanism (4) via a guide slider (10); the number of the adjustment mechanisms (4) is equal to the number of the module placement slots (2); a spiral screw (11) is provided in the adjustment mechanism (4) The spiral screw (11) passes through the guide slider (10), and the spiral screw (11) is slidably connected to the guide slider (10) through a thread; a metal sleeve (8) is provided at the connection between the guide slider (10) and the spiral screw (11), an internal thread is provided on the inner side of the metal sleeve (8), and the metal sleeve (8) is threadedly connected to the spiral screw (11); a pointer (9) is provided on the side of the metal sleeve (8) away from the module support frame (1), and the pointer (9) passes through the side wall of the adjustment mechanism (4), and a scale (6) is provided on the surface of the adjustment mechanism (4), and the scale (6) is located directly below the pointer (9).

2. A polyethylene step hole image quality meter according to claim 1, characterized in that: The center of the stepped hole type image quality meter is provided with a convenient hole (7) for taking the stepped module, and the module (3) is provided with a plurality of stepped holes of different sizes.

3. The polyethylene step hole image quality meter according to claim 1, characterized in that: The bottom of the spiral screw (11) is provided with anti-slip grooves (12).

4. The polyethylene step hole image quality meter according to claim 1, characterized in that: The minimum measurement unit of the scale (6) is 0.1 mm.

Images