Hand-held phased array scanning rack

Abstract

According to the hand-held phased array scanning frame provided by the utility model, the distance measuring mechanism is arranged, so that the distance measuring purpose can be achieved under the mutual matching action of the second measuring scale and the first measuring scale, further, a distance measuring reference is provided in the moving process of the frame body, and the deviation condition is reduced; meanwhile, a worker can check the distance between the probe and the welding seam in real time, so that the error of an actual detection image is reduced, and the problems of missing detection and misjudgment of defects are reduced. The device is further provided with a positioning mechanism, when the scanning frame is moved for detection, a positioning rule can be always kept in the same level with a welding seam, when the device deviates, the positioning rule deviates from the welding seam, and then a worker can find and adjust the position of the device in time. Besides, through the arrangement of the storage mechanism, the purpose of stable limiting is achieved, the distance measurement mechanism can be stored when distance measurement is not needed, excessive occupied space is reduced, and the practicability of the device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of scanning frames, in particular to a portable phased array scanning frame with a distance measurement function. Background Art

[0002] In the field of industrial non-destructive testing, the scanning frame is a crucial auxiliary equipment. Its original design purpose is to provide a stable and precise support and fixing platform for the detection probe, ensuring efficient and comprehensive detection of workpieces or complex structures (especially welds, internal defects and other subtle areas). This type of detection is of great significance for ensuring product quality and preventing safety hazards.

[0003] In the specific application scenario of weld inspection, the scanning frame plays a particularly critical role. It needs to work in conjunction with detection equipment such as ultrasonic probes to achieve comprehensive scanning and detailed analysis of the weld by precisely controlling the scanning path. However, in actual operation, a technical challenge that cannot be ignored is how to ensure that the scanning frame always maintains precise alignment with the center line of the weld during movement.

[0004] Traditionally, technicians rely on simple tools such as scales to initially set the distance between the probe and the weld centerline, and remove the scale once the initial calibration is completed. The limitation of this method is that it cannot provide a continuous, visual reference standard for the movement of the scanning frame. As the scanning work progresses, due to the lack of an effective trajectory tracking and correction mechanism, the scanning frame is prone to offset due to external factors (such as improper operation, equipment vibration, etc.), thereby deviating from the predetermined inspection trajectory.

[0005] This offset phenomenon not only causes a deviation between the preset sound beam coverage area in the detection process and the actual detection area, but may also affect the focusing effect of the ultrasonic probe, reducing the accuracy and reliability of defect detection. More specifically, the offset may cause calculation errors in the defect location, resulting in missed detection or misjudgment of defects, ultimately affecting product quality assessment and safety performance judgment. Utility Model Content

[0006] In order to solve the deficiencies of the prior art, the utility model aims to provide a portable phased array scanning frame, comprising:

[0007] The frame has magnetic rollers at both ends, which are used to move along the weld during the inspection process.

[0008] A U-shaped mounting frame is provided at the front end of the frame, and a probe is connected to the opening of the mounting frame, and the probe is used to detect whether there are defects in the weld;

[0009] The distance measuring mechanism is arranged at one end of the frame, and comprises:

[0010] Support frame, a plate-shaped hollow structure, with a first long groove provided on one side of its inner wall, and a first bolt is also provided at one end of the surface of the support frame;

[0011] Measuring ruler, with scales provided on one side, nested within the support frame, including a first measuring ruler and a second measuring ruler,

[0012] The first measuring ruler is fixedly connected with a first slider on the same side of the first long groove, and through the cooperation of the first slider and the first long groove, the first measuring ruler slides and extends in the support frame along the scale direction, and the first bolt is used to lock and fix the relative position of the first measuring ruler in the support frame;

[0013] The first measuring ruler is a plate-shaped hollow structure, with a second long groove provided on its inner wall, and a second bolt is also provided at one end of the surface of the first measuring ruler,

[0014] The second measuring ruler is fixedly connected with a second slider on the same side of the second long groove, and through the cooperation of the second slider and the second long groove, the second measuring ruler slides and extends in the first measuring ruler along the scale direction, and the second bolt is used to lock and fix the relative position of the second measuring ruler on the first measuring ruler;

[0015] Positioning mechanism, including:

[0016] Positioning ruler, whose length extension direction is the same as that of the second measuring ruler, and is fixedly connected and rotatably connected to the second measuring ruler through a connecting shaft;

[0017] Connecting shaft, passing through one end of the positioning ruler, and having threads on its outer wall for realizing the rotation of the positioning ruler relative to the connecting shaft in the vertical plane,

[0018] Threaded sleeve, cooperating with the connecting shaft, for fixing the position of the positioning ruler;

[0019] Receiving mechanism, fixedly installed on the frame body, and the receiving mechanism is slidably connected to the distance measuring mechanism for receiving the distance measuring mechanism.

[0020] In a preferred embodiment, the receiving mechanism includes:

[0021] Fixed slot, a hollow structure, with one end located at the front end of the scanning frame and the other end located at the rear end of the scanning frame,

[0022] Convex block, fixedly connected to the support frame, located at the rear end of the support frame, and through the cooperation of the convex block and the fixed slot, the support frame slides back and forth within the scanning frame,

[0023] Magnetic blocks, including magnetic block A, magnetic block B, magnetic block C and magnetic block D,

[0024] The magnetic block A is nested at the rear end of the convex block.

[0025] The magnetic block B is nested at the rear end of the fixing groove.

[0026] The magnetic block C is nested at the front end of the fixing groove.

[0027] The magnetic block D is nested at the front end of the convex block.

[0028] The magnetic block A and the magnetic block B are magnetic poles with opposite polarities.

[0029] The magnetic block C and the magnetic block D are magnetic poles with opposite polarities.

[0030] When the support frame slides to the front end of the scanning frame, the magnetic block C and the magnetic block D come into contact with each other.

[0031] When the support frame slides to the rear end of the scanning frame, the magnetic block A and the magnetic block B come into contact with each other, realizing the stable fixation and storage of the ranging mechanism.

[0032] In a preferred embodiment, the connection method between the probe and the mounting frame is selected from one or a combination of several of the following: bolt connection, welding connection, snap connection, magnetic attraction connection.

[0033] In a preferred embodiment, the detection method of the probe is selected from one or a combination of several of the following: ultrasonic detection, penetrant testing, magnetic particle testing, X-ray testing.

[0034] In a preferred embodiment, the connection method between the first bolt and the support frame includes one or a combination of several of the following: bolt connection, welding, tenon connection, plug-in connection.

[0035] Preferably, the connection method between the first bolt and the support frame is bolt connection, and a certain pre-tightening force is also set for the bolt connection to prevent relative sliding between the support frame and the first measuring scale.

[0036] More preferably, the setting method of the pre-tightening force is selected from one or a combination of several of the following: tightening torque method, nut rotation angle method, hydraulic stretching method.

[0037] In a preferred embodiment, the scanning frame further includes an encoder for recording the moving distance of the scanning frame.

[0038] In a preferred embodiment, the first long groove and the second long groove are arranged on the same side or different sides of the support frame.

[0039] In a preferred embodiment, the positioning scale and the second long groove are arranged on the same side or different sides of the first measuring scale.

[0040] In a preferred embodiment, the outer shape of the second slider matches the inner wall shape of the second long groove, and the second slider is slidably connected to the inner wall of the second long groove.

[0041] In a preferred embodiment, the outer shape of the first slider matches the inner wall shape of the first long groove, and the first slider is slidably connected to the inner wall of the first long groove.

[0042] In a preferred embodiment, the bottom end of the first bolt is in close contact with the top of the first measuring scale.

[0043] In a preferred embodiment, the bottom end of the second bolt is in close contact with the top of the second measuring scale.

[0044] In a preferred embodiment, the support frame is fixedly connected to the right side of the bump.

[0045] In a preferred embodiment, during the sliding process of the support frame, the back surface of the magnet A contacts the front surface of the magnet B.

[0046] In a preferred embodiment, during the sliding process of the support frame, the front surface of the magnet D contacts the back surface of the magnet C.

[0047] In a preferred embodiment, the left side of the threaded sleeve is in close contact with the right side of the positioning scale, and the positioning scale is rotatably connected to the outer wall of the connecting shaft, so that the threaded sleeve can stably press the positioning scale.

[0048] In a preferred embodiment, a roller is further provided at one end of the positioning scale away from the threaded sleeve, which facilitates the sliding of the positioning scale.

[0049] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0050] The present invention provides a portable phased array scanning frame. By setting a distance measuring mechanism, the purpose of distance measurement can be achieved under the mutual cooperation of the second measuring scale and the first measuring scale, and thus a reference for distance measurement can be provided during the movement of the frame body to reduce the situation of deviation. At the same time, the staff can view the distance between the probe and the weld in real time, reduce the error of the actual detection image, and reduce the problems of missed detection and misjudgment of defects. Moreover, the present invention is also provided with a positioning mechanism. When detecting by moving the scanning frame, the positioning scale can always be kept in the same horizontal plane as the weld. When the device deviates, at this time, the positioning scale will deviate from the weld, and thus the staff can timely discover and adjust the position of the device. In addition, through the provided storage mechanism of the present invention, the purpose of stable limiting is achieved. When distance measurement is not required, the distance measuring mechanism can be stored to reduce the occupation of too much space and enhance the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0052] Figure 1 Schematic diagram of the front-end structure of the embodiment of the present invention.

[0053] Figure 2 Schematic diagram of the rear-end structure of the embodiment of the present invention.

[0054] Figure 3 Schematic diagram of the structure at the support frame of the embodiment of the present invention.

[0055] Figure 4 Partial cross-sectional view of the top of the support frame of the embodiment of the present invention.

[0056] Figure 5 Partial cross-sectional view of the top of the first measuring scale in the embodiment of the present invention.

[0057] Figure 6 Schematic diagram of the structure at the second measuring scale in the embodiment of the present invention.

[0058] Figure 7 For Figure 2 Enlarged schematic diagram of the structure at position A in

[0059] Figure 8 Left view of the support frame in the embodiment of the present invention.

[0060] Figure 9 For Figure 8 Enlarged schematic diagram of the structure at position B in

[0061] Figure 10 Schematic diagram of the connection relationship between the connecting shaft and the second measuring scale in the embodiment of the present invention.

[0062] Explanation of the reference numerals is as follows: 1-1, frame body; 1-2, encoder; 1-3, magnetic roller; 1-4, mounting bracket; 1-5, probe; 2-1, ranging mechanism; 2-2, storage mechanism; 2-11, support frame; 2-12, first long groove; 2-13, first bolt; 2-14, slider A; 2-15, first measuring scale; 2-16, second long groove; 2-17, slider B; 2-18, second measuring scale; 2-19, second bolt; 2-21, fixing groove; 2-22, convex block; 2-23, magnetic block A; 2-24, magnetic block B; 2-25, magnetic block C; 2-26, magnetic block D; 2-31, connecting shaft; 2-32, threaded sleeve; 2-33, positioning scale. Detailed implementation mode

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0064] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0065] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0067] Embodiment

[0068] This embodiment provides a portable phased array scanning frame, as Figures 1 to 9 shown, including:

[0069] The frame body 1-1 is provided with magnetic rollers 1-3 inside, a storage mechanism 2-2 is arranged on one side of the frame body 1-1, a distance measuring mechanism 2-1 is arranged on one side of the storage mechanism 2-2, an encoder 1-2 and a mounting bracket 1-4 are respectively arranged inside the frame body 1-1, and a probe 1-5 is arranged inside the mounting bracket 1-4.

[0070] The distance measuring mechanism 2-1 includes a support frame 2-11, the support frame 2-11 is arranged on one side of the storage mechanism 2-2, and one end of the upper surface of the support frame 2-11 is threadedly connected with a first bolt 2-13. The support frame 2-11 is a plate-shaped hollow structure, and a first long groove 2-12 is opened on its inner wall. A first measuring scale 2-15 is slidably connected to the inner wall of the support frame 2-11, and a slider A 2-14 is fixedly connected to the outside of the first measuring scale 2-15. One end of the upper surface of the first measuring scale 2-15 is threadedly connected with a second bolt 2-19. The first measuring scale 2-15 is a plate-shaped hollow structure, and a second long groove 2-16 is opened on its inner wall. A second measuring scale 2-18 is slidably connected to the inner wall of the first measuring scale 2-15, and a slider B 2-17 is fixedly connected to the outside of the second measuring scale 2-18.

[0071] Further, the outer shape of the slider B 2-17 matches the inner shape of the inner wall of the second long groove 2-16, and the slider B 2-17 is slidably connected to the inner wall of the second long groove 2-16.

[0072] Further, the outer shape of the slider A 2-14 matches the inner shape of the inner wall of the first long groove 2-12, and the slider A 2-14 is slidably connected to the inner wall of the first long groove 2-12, so as to stably slide and limit the first measuring scale 2-15.

[0073] Further, the bottom end of the first bolt 2-13 is in close contact with the top of the first measuring scale 2-15, and the bottom end of the second bolt 2-19 is in close contact with the top of the second measuring scale 2-18, so as to achieve the purpose of stable pressing and limiting.

[0074] The storage mechanism 2-2 includes: a fixed groove 2-21, the fixed groove 2-21 is fixedly connected to the inside of the frame body 1-1, a convex block 2-22 is slidably connected to the inner wall of the fixed groove 2-21, the convex block 2-22 is fixedly connected to the support frame 2-11 and is located at the rear end of the support frame 2-11. A magnetic block A 2-23 is fixedly connected to the back of the convex block 2-22, a magnetic block B 2-24 is fixedly connected to the back of the inner wall of the fixed groove 2-21, a magnetic block C 2-25 is fixedly connected to the front of the inner wall of the fixed groove 2-21, and a magnetic block D 2-26 is fixedly connected to the front of the convex block 2-22, which is convenient for storing the distance measuring mechanism 2-1 and reducing the occupied space.

[0075] Further, the front of the magnetic block D 2-26 and the back of the magnetic block C 2-25 are opposite magnetic poles, and the support frame 2-11 is fixedly connected to the right side of the convex block 2-22 to achieve the purpose of stable movement.

[0076] Further, the back surface of the magnetic block A 2-23 is in contact with the front surface of the magnetic block B 2-24. The back surface of the magnetic block A 2-23 and the front surface of the magnetic block B 2-24 are opposite magnetic poles to each other. Under the mutual cooperation of the magnetic block A 2-23 and the magnetic block B 2-24, the bump 2-22 can be adsorbed and limited.

[0077] The positioning mechanism is arranged on one side of the second measuring scale 2-18 and includes: a connecting shaft 2-31, a threaded sleeve 2-32 and a positioning scale 2-33. Among them, the connecting shaft 2-31 is fixedly connected to one side of the second measuring scale 2-18. The outer wall of the connecting shaft 2-31 is threadedly connected with the threaded sleeve 2-32, which is convenient for positioning the weld seam. The left side of the threaded sleeve 2-32 is in close contact with the right side of the positioning scale 2-33. One end of the positioning scale 2-33 is rotatably installed on the outer wall of the connecting shaft 2-31, so that the positioning scale 2-33 can rotate relative to the connecting shaft 2-31 in the vertical plane; by pressing the positioning scale 2-33 with the threaded sleeve 2-32, the position of the positioning scale 2-33 is fixed. A roller is also provided at the end of the positioning scale 2-33 far from the threaded sleeve, which is convenient for the sliding of the positioning scale.

[0078] The usage steps of the portable phased array scanning frame in this embodiment include:

[0079] Pull out the support frame 2-11 towards the front (the so-called "front" in this application refers to the direction facing the user), so that the bump 2-22 moves towards the front. Then, the magnetic block C 2-25 and the magnetic block D 2-26 will be adsorbed and limited to each other. Then rotate the second bolt 2-19 so that the second bolt 2-19 no longer presses and limits the second measuring scale 2-18. At this time, the second measuring scale 2-18 can be pulled out from the inside of the first measuring scale 2-15. At the same time, the slider B 2-17 can slide and be limited on the inner wall of the second long groove 2-16. The second measuring scale 2-18 can be used for preliminary distance measurement. When the measurement distance of the second measuring scale 2-18 is not enough, at this time, the first bolt 2-13 can be rotated to make the first bolt 2-13 no longer press and limit the first measuring scale 2-15. At this time, pull the first measuring scale 2-15 towards the front so that the first measuring scale 2-15 is pulled out from the inside of the support frame 2-11. At the same time, the slider A 2-14 can slide and be limited on the inner wall of the first long groove 2-12. Thus, the distance measurement can be achieved under the mutual cooperation of the second measuring scale 2-18 and the first measuring scale 2-15. Furthermore, a reference for distance measurement can be provided during the movement of the frame body 1-1, reducing the deviation. At the same time, the staff can view the distance between the probe 1-5 and the weld seam in real time, reducing the error of the actual detection image and reducing the problems of missed detection and misjudgment of defects.

[0080] When the detection work is completed, the support frame 2-11 can be pushed backward (in this application, the so-called "rear side" refers to the direction away from the user). The support frame 2-11 drives the bump 2-22 to move, making the magnet A 2-23 and the magnet B 2-24 approach each other. Since the front surface of the magnet B 2-24 and the back surface of the magnetic roller 1-3 of the mounting frame 1-4 are opposite magnetic poles, when the front surface of the magnet B 2-24 contacts the back surface of the magnet A 2-23, the magnet A 2-23 and the magnet B 2-24 will adsorb each other, thus achieving the purpose of stable positioning. When ranging is not required, the ranging mechanism 2-1 can be stored to reduce the occupation of too much space and enhance the practicability of the device.

[0081] When the ranging of the weld seam and the probe 1-5 is completed, the threaded sleeve 2-32 can be rotated at this time, so that the threaded sleeve 2-32 no longer presses and positions the positioning ruler 2-33. At this time, the positioning ruler 2-33 can rotate in the vertical plane relative to the outer wall of the connecting shaft 2-31, and the positioning ruler 2-33 makes a 90-degree circular motion along the center point of the connecting shaft 2-31, so that the positioning ruler 2-33 can be aligned with the weld seam. Then, the threaded sleeve 2-32 is rotated in the reverse direction again, so that the threaded sleeve 2-32 can press the positioning ruler 2-33, and further the positioning ruler 2-33 cannot move. When the mobile device is detected, the positioning ruler 2-33 can always be kept in the same horizontal plane as the weld seam. When the device deviates, at this time, the positioning ruler 2-33 will deviate from the weld seam, and then the staff can timely discover and adjust the position of the device to ensure that the detection work can be carried out stably, and further improve the stability of the detection.

[0082] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A portable phased array scanning frame, characterized in that Including: A frame body with magnetic rollers provided at both ends, and the magnetic rollers are used to move along the weld during the detection process. A U-shaped mounting frame is provided at the front end of the frame body, and a probe is connected to the opening of the mounting frame. The probe is used to detect whether there are defects in the weld. A ranging mechanism is provided at one end of the frame body, including: A support frame, which is a plate-shaped hollow structure. One side of the inner wall is provided with a first long groove, and a first bolt is also provided at one end of the surface of the support frame. A measuring scale, with a scale on one side, is nested in the support frame and includes a first measuring scale and a second measuring scale. A first slider is fixedly connected to the first measuring scale on the same side of the first long groove. Through the cooperation of the first slider and the first long groove, the first measuring scale slides and expands along the scale direction in the support frame, and the first bolt is used to lock and fix the relative position of the first measuring scale in the support frame. The first measuring scale is a plate-shaped hollow structure, and a second long groove is provided on the inner wall. A second bolt is also provided at one end of the surface of the first measuring scale. A second slider is fixedly connected to the second measuring scale on the same side of the second long groove. Through the cooperation of the second slider and the second long groove, the second measuring scale slides and expands along the scale direction in the first measuring scale, and the second bolt is used to lock and fix the relative position of the second measuring scale on the first measuring scale. A positioning mechanism, including: A positioning scale, whose length extension direction is the same as that of the second measuring scale, and is fixedly connected and rotatably connected to the second measuring scale through a connecting shaft. A connecting shaft penetrates through one end of the positioning scale, and a thread is provided on its outer wall to realize the rotation of the positioning scale relative to the connecting shaft in the vertical plane. A thread sleeve is matched with the connecting shaft to fix the position of the positioning scale. A storage mechanism is fixedly installed on the frame body. The storage mechanism is slidably connected to the ranging mechanism and is used to store the ranging mechanism.

2. The scanning frame according to claim 1, wherein The storage mechanism includes: A fixed slot, which is a hollow structure. One end is located at the front end of the scanning frame, and the other end is located at the rear end of the scanning frame. A convex block is fixedly connected to the support frame and is located at the rear end of the support frame. Through the cooperation of the convex block and the fixed slot, the support frame slides back and forth in the scanning frame. Magnetic blocks, including magnetic block A, magnetic block B, magnetic block C, and magnetic block D. Magnetic block A is nested at the rear end of the convex block. Magnetic block B is nested at the rear end of the fixed slot. Magnetic block C is nested at the front end of the fixed slot. Magnetic block D is nested at the front end of the convex block. Magnetic block A and magnetic block B are magnetic poles with opposite polarities. Magnetic block C and magnetic block D are magnetic poles with opposite polarities. When the support frame slides to the front end of the scanning frame, magnetic block C and magnetic block D are in contact with each other. When the support frame slides to the rear end of the scanning frame, magnetic block A and magnetic block B are in contact with each other, realizing the stable fixation and storage of the ranging mechanism.

3. The scanning frame according to claim 1, characterized in that, The detection method of the probe is selected from one or a combination of several of the following: ultrasonic detection, penetrant detection, magnetic particle detection, and X-ray detection.

4. The scanning frame according to claim 1, characterized in that, The connection mode of the first bolt and the support frame is bolt connection, and a certain pre-tightening force is also set for the bolt connection to prevent relative slippage between the support frame and the first measuring scale.

5. The scanning frame according to claim 1, characterized in that, The scanning frame further includes an encoder for recording the moving distance of the scanning frame.

6. The scanning frame according to claim 1, characterized in that The outer shape of the second slider matches the inner wall shape of the second long groove, and the second slider is slidably connected to the inner wall of the second long groove.

7. The scanning frame according to claim 1, characterized in that, The outer shape of the first slider matches the inner wall shape of the first long groove, and the first slider is slidably connected to the inner wall of the first long groove.

8. The scanning frame according to claim 1, characterized in that, The bottom end of the first bolt is in close contact with the top of the first measuring scale.

9. The scanning frame according to claim 2, wherein, During the sliding process of the support frame, the back surface of the magnet A contacts the front surface of the magnet B; and / or During the sliding process of the support frame, the front surface of the magnet D contacts the back surface of the magnet C.

10. The scanning frame according to claim 1, characterized in that, A roller is further arranged at one end of the positioning scale far from the threaded sleeve to facilitate the sliding of the positioning scale.

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