Digital ultrasonic flaw detector convenient to maintain

Abstract

The utility model discloses a digital ultrasonic flaw detector convenient to maintain, which relates to the technical field of flaw detectors and comprises a first shell, a second shell, a fixing block, a first buckle component, a second buckle component and a control component. When maintenance is needed, the first buckle component and the second buckle component are reset by removing the control component, so that the fixing block is separated from the first shell and the second shell, and meanwhile, the first shell and the second shell are relatively separated, and therefore, the disassembly work is completed; the first buckle component and the second buckle component are adjusted through the control component, the first shell and the second shell are assembled, the fixing block can be assembled with the first shell and the second shell together, and the first shell, the second shell and the fixing block are tightly fixed by controlling the control component; therefore, the digital ultrasonic flaw detector can be assembled without any auxiliary work, so that the digital ultrasonic flaw detector is more convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of flaw detectors, in particular to a digital ultrasonic flaw detector which is easy to maintain. Background Art

[0002] Digital ultrasonic flaw detector is a portable industrial non-destructive flaw detection instrument, which can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose various defects (cracks, looseness, pores, inclusions, etc.) inside the workpiece. It can be used in laboratories as well as on-site projects. It is widely used in boilers, pressure vessels, aerospace, aviation, electric power, petroleum, chemical industry, offshore oil, pipelines, military industry, shipbuilding, automobiles, machinery manufacturing, metallurgy, metal processing industry, steel structure, railway transportation, nuclear power, colleges and universities and other industries.

[0003] When the existing digital ultrasonic flaw detector is damaged and needs to be repaired, it is usually necessary to disassemble the shell of the digital ultrasonic flaw detector to inspect and repair the inside. However, the shell of the digital ultrasonic flaw detector generally has threaded nails and positioning columns for use. Tools are required to assist in disassembly and assembly. At the same time, a lot of time is required to match the threaded nails and positioning columns during assembly, which prolongs the maintenance time and is very inconvenient. Utility Model Content

[0004] The utility model aims to provide a digital ultrasonic flaw detector which is easy to maintain, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A digital ultrasonic flaw detector that is easy to maintain comprises a first shell and a second shell, wherein the first shell is movably connected to the second shell, a fixing groove and a limiting groove are provided on the first shell and the second shell, a fixing block is provided at one end of the first shell and the second shell, a first buckle component for fixing the first shell and the second shell is connected in the fixing block, a second buckle component for fixing the first shell and the second shell is connected in the fixing block, a control component for controlling the first buckle component and the second buckle component is connected in the fixing block, a movable groove is provided in the fixing block, and the first buckle component and the second buckle component are symmetrically arranged.

[0007] When the damaged ultrasonic flaw detector needs to be repaired, the first snap component and the second snap component are reset by removing the control component, so that the fixing block is disengaged from the first shell and the second shell, and the first shell and the second shell are also relatively disengaged, thereby completing the disassembly work. When assembly is required, the first snap component and the second snap component are adjusted by the control component, and then the first shell and the second shell are assembled. The fixing block will be assembled with the first shell and the second shell through the first snap component and the second snap component, and then the first shell, the second shell and the fixing block are tightly fixed by controlling the control component. In this way, the digital ultrasonic flaw detector can be assembled without any auxiliary work, making the maintenance of the digital ultrasonic flaw detector more convenient.

[0008] A further improvement of the technical solution of the utility model is that: the first snap-fit ​​component includes a rotating shaft, the rotating shaft is fixedly connected to the fixed block, a gear is rotatably connected to the rotating shaft, a first rack and a second rack are arranged in the fixed block, the first rack and the second rack are respectively slidably connected to the fixed block, the first rack and the second rack are respectively meshed with the gear, one end of the first rack is fixedly connected to a torsion block, a side of the torsion block close to the first rack is fixedly connected to a pressure spring, the other end of the pressure spring is fixedly connected to the fixed block, the torsion block is slidably connected to the fixed block, an end of the first rack away from the torsion block is fixedly connected to a card slot, an end of the second rack close to the torsion block is fixedly connected to a connecting rod, an end of the connecting rod away from the second rack is fixedly connected to a fixed column, and the fixed column is slidably connected to the fixed slot.

[0009] The above technical solution is adopted. In this solution, when the first shell and the second shell need to be fixed, the torsion block is pressed. At this time, the pressure spring is in a compressed state. The torsion block will drive the first rack to move, thereby transmitting power to the second rack through the gear. Then, the position of the fixing column is adjusted by moving the second rack, thereby achieving the purpose of fixing the first shell and the second shell. This is not only convenient for operation, but also does not require the use of tools to assist in adjustment, so that the digital ultrasonic flaw detector can be quickly repaired. When disassembly is required, the reverse operation can be performed.

[0010] A further improvement of the technical solution of the utility model is that: the second snap-fit ​​component includes a C-shaped plate, the C-shaped plate is slidably connected to the fixed block, an elastic spring is fixedly connected to the C-shaped plate, the other end of the elastic spring is fixedly connected to the fixed block, one end of the C-shaped plate is provided with an inclined plate, the end of the C-shaped plate away from the inclined plate is fixedly connected to the fixed plate, a number of clamping blocks are evenly arranged on the fixed plate, the fixed plate is slidably connected to the limit groove, a number of limit blocks are evenly arranged in the limit groove, the limit block is fixedly connected to the limit groove, and the clamping block is clamped with the limit block.

[0011] The above-mentioned technical solution is adopted. In this solution, when it is necessary to fix the first shell and the second shell by the second snap-fit ​​component, the control component is started to adjust the position of the fixing plate by squeezing the C-shaped plate. At this time, the disengagement spring is in a stretched state, and then the fixing plate is inserted into the limiting grooves on the first shell and the second shell. Then, the control component is started again to adjust the position of the fixing plate by adjusting the C-shaped plate, so that the clamping block is engaged with the limiting block, thereby fixing the first shell, the second shell and the fixing block, thereby facilitating assembly. When disassembly is required, the reverse operation can be performed.

[0012] A further improvement of the technical solution of the utility model is that: the control component includes a threaded rod, the threaded rod is threadedly connected to the fixed block, the end of the threaded rod away from the fixed block is fixedly connected to a knob, a baffle is slidably connected in the movable groove, the end of the baffle away from the threaded rod is fixedly connected to a reset spring, the other end of the reset spring is fixedly connected to the fixed block, the side of the baffle close to the reset spring is respectively fixedly connected to a limit plate and an insertion rod, the limit plate and the insertion rod are symmetrically arranged, and a movable groove is provided on the limit plate.

[0013] The above-mentioned technical scheme is adopted. In this scheme, when it is necessary to fix the first shell, the second shell and the fixed block, the threaded rod is rotated by the knob, so that the threaded rod contacts the baffle and squeezes the reset spring so that the limit plate squeezes the C-shaped plate, causing the elastic spring to be in a stretched state, and then the position of the fixed column is adjusted by squeezing the torsion block, and the fixed plate and the fixed column are respectively inserted into the fixing groove and the limit groove to achieve the fixing effect, and then the knob is continued to be twisted to make the movable groove movably connected to the inclined plate, and the insertion rod is movably connected to the card slot, thereby achieving the effect of fixing the first shell, the second shell and the fixed block.

[0014] A further improvement of the technical solution of the utility model is that the limiting block and the clamping block are in the shape of a right triangle, and the right-angled sides of the limiting block and the clamping block are in contact.

[0015] The above technical solution is adopted, in which the shape of the limit block and the clamping block is set to be a right triangle and the right-angled sides of the limit block and the clamping block are in contact in order to increase the contact area between the limit block and the clamping block, thereby enhancing the fixing effect during use of the device.

[0016] A further improvement of the technical solution of the utility model is that one end of the first rack close to the slot is fixedly connected to the limiting tooth.

[0017] The above technical solution is adopted, in which a limit tooth is fixedly connected to one end of the first rack because when the rack and the gear are meshed with each other, overload of the first rack movement may cause the rack and the gear to be disengaged, thereby damaging the device.

[0018] A further improvement of the technical solution of the utility model is that a knurled groove is provided on the outer surface of the knob.

[0019] The above technical solution is adopted, in which a knurled groove is provided on the outer side of the knob because the knurled groove can increase the friction of the surface, improve the anti-slip property, and make the knob more reliable during use.

[0020] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0021] 1. The utility model provides a digital ultrasonic flaw detector that is easy to maintain. When the damaged ultrasonic flaw detector needs to be repaired, the first snap component and the second snap component are reset by removing the control component, so that the fixed block is separated from the first shell and the second shell, and the first shell and the second shell are also relatively separated, thereby completing the disassembly work. When assembly is required, the first snap component and the second snap component are adjusted by the control component, and then the first shell and the second shell are assembled. The fixed block is assembled with the first shell and the second shell through the first snap component and the second snap component, and then the first shell, the second shell and the fixed block are tightly fixed by controlling the control component. In this way, the digital ultrasonic flaw detector can be assembled without any auxiliary work, making the maintenance of the digital ultrasonic flaw detector more convenient.

[0022] 2. The utility model provides a digital ultrasonic flaw detector that is easy to maintain. The limit block and the clamping block are shaped as a right triangle and the right-angled sides of the limit block and the clamping block are in contact with each other in order to increase the contact area between the limit block and the clamping block, thereby enhancing the fixing effect during the use of the device.

[0023] 3. The utility model provides a digital ultrasonic flaw detector that is easy to maintain. A limit tooth is fixedly connected to one end of the first rack because when the rack and the gear are meshed with each other, overload of the first rack movement may cause the rack and the gear to be disengaged, thereby damaging the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the closed structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the left-side cross-sectional structure of the utility model;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0028] Figure 4 It is a schematic diagram of the expanded structure of the utility model;

[0029] Figure 5It is a partial structural schematic diagram of the second buckle component of the utility model;

[0030] Figure 6 This is a schematic diagram of the limit block and the clamping block structure of the utility model;

[0031] Figure 7 It is a schematic diagram of the expanded partial structure of the utility model;

[0032] In the figure: 1. first shell; 2. second shell; 3. fixing groove; 4. limiting groove; 5. fixing block; 6. moving groove; 7. rotating shaft; 8. gear; 9. first rack; 10. second rack; 11. torsion block; 12. pressure spring; 13. slot; 14. connecting rod; 15. fixing column; 16. C-type plate; 17. elastic spring; 18. inclined plate; 19. fixing plate; 20. block; 21. limiting block; 22. threaded rod; 23. knob; 24. baffle; 25. reset spring; 26. limiting plate; 27. plug rod; 28. movable groove; 29. ​​limiting tooth; 30. knurled groove. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the embodiments:

[0034] like Figure 1 As shown, the utility model provides a digital ultrasonic flaw detector that is easy to maintain, including a first shell 1 and a second shell 2, the first shell 1 and the second shell 2 are movably connected, the first shell 1 and the second shell 2 are both provided with a fixing groove 3 and a limiting groove 4, one end of the first shell 1 and the second shell 2 is provided with a fixing block 5, a first buckle component for fixing the first shell 1 and the second shell 2 is connected in the fixing block 5, a second buckle component for fixing the first shell 1 and the second shell 2 is connected in the fixing block 5, a control component for controlling the first buckle component and the second buckle component is connected in the fixing block 5, a movable groove 6 is provided in the fixing block 5, and the first buckle component and the second buckle component are symmetrically arranged respectively.

[0035] In this embodiment, when the damaged ultrasonic flaw detector needs to be repaired, the first snap component and the second snap component are reset by removing the control component, so that the fixing block 5 is disengaged from the first shell 1 and the second shell 2, and the first shell 1 and the second shell 2 are also relatively disengaged, thereby completing the disassembly work. When assembly is required, the first snap component and the second snap component are adjusted by the control component, and then the first shell 1 and the second shell 2 are assembled. The fixing block 5 will be assembled with the first shell 1 and the second shell 2 through the first snap component and the second snap component, and then the first shell 1, the second shell 2 and the fixing block 5 are tightly fixed by controlling the control component. In this way, the digital ultrasonic flaw detector can be assembled without any auxiliary work, making the maintenance of the digital ultrasonic flaw detector more convenient.

[0036] like Figure 3 , Figure 7 As shown, in the present embodiment, preferably, the first snap-fit ​​component includes a rotating shaft 7, which is fixedly connected to the fixed block 5, and a gear 8 is rotatably connected to the rotating shaft 7. A first rack 9 and a second rack 10 are arranged in the fixed block 5, and the first rack 9 and the second rack 10 are respectively slidably connected to the fixed block 5, and the first rack 9 and the second rack 10 are respectively meshed with the gear 8, and one end of the first rack 9 is fixedly connected to a torsion block 11, and a pressure spring 12 is fixedly connected to the side of the torsion block 11 close to the first rack 9, and the other end of the pressure spring 12 is fixedly connected to the fixed block 5, and the torsion block 11 is slidably connected to the fixed block 5, and a card slot 13 is fixedly provided at one end of the first rack 9 away from the torsion block 11, and a connecting rod 14 is fixedly connected to one end of the second rack 10 close to the torsion block 11, and a fixing column 15 is fixedly connected to one end of the connecting rod 14 away from the second rack 10, and the fixing column 15 is slidably connected to the fixing groove 3.

[0037] When the first shell 1 and the second shell 2 need to be fixed, the torsion block 11 is pressed. At this time, the pressure spring 12 is in a compressed state. The torsion block 11 will drive the first rack 9 to move, thereby transmitting power to the second rack 10 through the gear 8. Then, the position of the fixing column 15 is adjusted by moving the second rack 10, so as to achieve the purpose of fixing the first shell 1 and the second shell 2. This is not only convenient for operation, but also does not require the use of tools to assist in adjustment, so that the digital ultrasonic flaw detector can be quickly inspected and repaired. When disassembly is required, the reverse operation can be performed.

[0038] like Figure 2 , Figure 5As shown, preferably, the second snap-fit ​​component includes a C-shaped plate 16, which is slidably connected to the fixed block 5, and a spring 17 is fixedly connected to the C-shaped plate 16, and the other end of the spring 17 is fixedly connected to the fixed block 5. An inclined plate 18 is provided at one end of the C-shaped plate 16, and an end of the C-shaped plate 16 away from the inclined plate 18 is fixedly connected to a fixed plate 19, and a plurality of clamping blocks 20 are evenly arranged on the fixed plate 19, and the fixed plate 19 is slidably connected to the limit groove 4, and a plurality of limit blocks 21 are evenly arranged in the limit groove 4, and the limit block 21 is fixedly connected to the limit groove 4, and the clamping block 20 is clamped with the limit block 21.

[0039] When it is necessary to fix the first shell 1 and the second shell 2 by the second snap-fit ​​component, the control component is started at this time to adjust the position of the fixing plate 19 by squeezing the C-shaped plate 16. At this time, the disengagement spring is in a stretched state, and then the fixing plate 19 is inserted into the limiting groove 4 on the first shell 1 and the second shell 2. Then, the control component is started again to adjust the position of the fixing plate 19 by adjusting the C-shaped plate 16, so that the clamping block 20 is clamped with the limiting block 21, thereby fixing the first shell 1, the second shell 2 and the fixing block 5, thereby facilitating assembly. When disassembly is required, the reverse operation can be performed.

[0040] like Figure 2 As shown, preferably, the control component includes a threaded rod 22, the threaded rod 22 is threadedly connected to the fixed block 5, the end of the threaded rod 22 away from the fixed block 5 is fixedly connected to a knob 23, a baffle 24 is slidably connected in the movable groove 6, the end of the baffle 24 away from the threaded rod 22 is fixedly connected to a return spring 25, the other end of the return spring 25 is fixedly connected to the fixed block 5, the side of the baffle 24 close to the return spring 25 is respectively fixedly connected to a limit plate 26 and an insertion rod 27, the limit plate 26 and the insertion rod 27 are symmetrically arranged, and a movable groove 28 is opened on the limit plate 26.

[0041] When it is necessary to fix the first shell 1, the second shell 2 and the fixed block 5, the threaded rod 22 is rotated by the knob 23, so that the threaded rod 22 contacts the baffle 24 and squeezes the return spring 25 so that the limit plate 26 squeezes the C-shaped plate 16, causing the elastic spring 17 to be in a stretched state, and then the position of the fixing column 15 is adjusted by squeezing the torsion block 11, and the fixing plate 19 and the fixing column 15 are respectively inserted into the fixing groove 3 and the limit groove 4 to achieve the fixing effect, and then the knob 23 is continued to be twisted to make the movable groove 28 movably connected with the inclined plate 18, and the insertion rod 27 is movably connected with the card slot 13, thereby achieving the effect of fixing the first shell 1, the second shell 2 and the fixed block 5.

[0042] like Figure 6 As shown, based on Example 1, the utility model provides a technical solution: preferably, the limiting block 21 and the clamping block 20 are in the shape of a right triangle, and the right-angled sides of the limiting block 21 and the clamping block 20 are in contact.

[0043] In this embodiment, the shape of the limit block 21 and the clamping block 20 is set to be a right triangle and the right-angled sides of the limit block 21 and the clamping block 20 are in contact in order to increase the contact area between the limit block 21 and the clamping block 20, thereby enhancing the fixing effect during use of the device.

[0044] like Figure 3 As shown, based on Example 2, the utility model provides a technical solution: preferably, one end of the first rack 9 close to the slot 13 is fixedly connected to the limiting tooth 29 .

[0045] In this embodiment, the limiting tooth 29 is fixedly connected to one end of the first rack 9 because when the rack and the gear 8 are meshed with each other, overload of the first rack 9 may cause the rack and the gear 8 to be disengaged, thereby damaging the device.

[0046] like Figure 1 As shown, based on Example 3, the utility model provides a technical solution: preferably, a knurled groove 30 is provided on the outer surface of the knob 23.

[0047] In this embodiment, the knurled groove 30 is provided on the outer side of the knob 23 because the knurled groove 30 can increase the friction of the surface, improve the anti-slip property, and make the knob 23 more reliable during use.

[0048] The following is a detailed description of the working principle of this easy-to-maintain digital ultrasonic flaw detector.

[0049] like Figure 1-7As shown, when the damaged ultrasonic flaw detector needs to be repaired, the first snap component and the second snap component are reset by removing the control component, so that the fixing block 5 is disengaged from the first shell 1 and the second shell 2, and the first shell 1 and the second shell 2 are also relatively disengaged, thereby completing the disassembly work. When assembly is required, the first snap component and the second snap component are adjusted by the control component, and then the first shell 1 and the second shell 2 are assembled. The fixing block 5 will be assembled with the first shell 1 and the second shell 2 through the first snap component and the second snap component, and then the first shell 1, the second shell 2 and the fixing block 5 are tightly fixed by controlling the control component. In this way, the digital ultrasonic flaw detector can be assembled without any auxiliary work, making the maintenance of the digital ultrasonic flaw detector more convenient. When the first shell 1 and the second shell 2 need to be fixed, by pressing the torsion block 11, the pressure spring 12 is in a compressed state, and the torsion block 11 will drive the first rack 9 to move, thereby transmitting power to the second rack 10 through the gear 8, and then adjust the position of the fixing column 15 by moving the second rack 10, so as to achieve the purpose of fixing the first shell 1 and the second shell 2. This is not only convenient for operation, but also does not require the use of tools to assist in adjustment, so that it is convenient to quickly overhaul the digital ultrasonic flaw detector. When disassembly is required, the reverse operation can be performed. When the first shell 1 and the second shell 2 need to be fixed by the second buckle component, the control component is started at this time to adjust the position of the fixing plate 19 by squeezing the C-type plate 16, and the disengagement spring is in a stretched state, and then the fixing plate 19 is inserted into the limit groove 4 on the first shell 1 and the second shell 2, and then the control component is started again to adjust the position of the fixing plate 19 by adjusting the C-type plate 16, so that the clamping block 20 is clamped with the limit block 21, thereby fixing the first shell 1, the second shell 2 and the fixing block 5, and achieving the purpose of easy assembly, and the reverse operation can be performed when disassembly is required. When it is necessary to fix the first shell 1, the second shell 2 and the fixed block 5, the threaded rod 22 is rotated by the knob 23, so that the threaded rod 22 contacts the baffle 24 and squeezes the reset spring 25 so that the limit plate 26 squeezes the C-shaped plate 16, causing the elastic spring 17 to be in a stretched state, and then the position of the fixed column 15 is adjusted by squeezing the twist block 11, and the fixed plate 19 and the fixed column 15 are respectively inserted into the fixed groove 3 and the limit groove 4 to achieve the fixing effect, and then the knob 23 is continued to be twisted so that the movable groove 28 is movably connected with the inclined plate 18, and the insertion rod 27 is movably connected with the card slot 13, so as to achieve the effect of fixing the first shell 1, the second shell 2 and the fixed block 5. The shape of the limit block 21 and the card block 20 is set to be a right triangle and the right-angled sides of the limit block 21 and the card block 20 are in contact in order to increase the contact area between the limit block 21 and the card block 20, thereby enhancing the fixing effect during the use of the device.The reason why the limiting teeth 29 are fixedly connected to one end of the first rack 9 is that when the rack and the gear 8 are meshed with each other, the first rack 9 may be overloaded and the rack and the gear 8 may be disengaged, thereby damaging the device. The reason why the knurled grooves 30 are provided on the outer side of the knob 23 is that the knurled grooves 30 can increase the friction force of the surface, improve the anti-slip property, and make the knob 23 more reliable during use.

[0050] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A digital ultrasonic flaw detector that is easy to maintain, comprising a first housing (1) and a second housing (2); characterized in that: The first shell (1) and the second shell (2) are movably connected, and the first shell (1) and the second shell (2) are both provided with a fixing groove (3) and a limiting groove (4), and one end of the first shell (1) and the second shell (2) is provided with a fixing block (5), and a first buckle component for fixing the first shell (1) and the second shell (2) is connected inside the fixing block (5), and a second buckle component for fixing the first shell (1) and the second shell (2) is connected inside the fixing block (5), and a control component for controlling the first buckle component and the second buckle component is connected inside the fixing block (5), and a movable groove (6) is provided inside the fixing block (5), and the first buckle component and the second buckle component are symmetrically arranged.

2. The digital ultrasonic flaw detector that is easy to maintain according to claim 1 is characterized in that: The first buckle component comprises a rotating shaft (7), the rotating shaft (7) is fixedly connected to the fixed block (5), a gear (8) is rotatably connected to the rotating shaft (7), a first rack (9) and a second rack (10) are arranged in the fixed block (5), the first rack (9) and the second rack (10) are respectively slidably connected to the fixed block (5), the first rack (9) and the second rack (10) are respectively meshed with the gear (8), one end of the first rack (9) is fixedly connected to a torsion block (11), the torsion block (11) is close to the first rack (9) ) is fixedly connected to one side of the rack (1), the other end of the pressure spring (12) is fixedly connected to the fixed block (5), the torsion block (11) is slidably connected to the fixed block (5), the end of the first rack (9) away from the torsion block (11) is fixedly connected to a slot (13), the end of the second rack (10) close to the torsion block (11) is fixedly connected to a connecting rod (14), the end of the connecting rod (14) away from the second rack (10) is fixedly connected to a fixing column (15), and the fixing column (15) is slidably connected to the fixing slot (3).

3. The digital ultrasonic flaw detector that is easy to maintain according to claim 2 is characterized in that: The second buckle component comprises a C-shaped plate (16), the C-shaped plate (16) is slidably connected to the fixed block (5), an elastic spring (17) is fixedly connected to the C-shaped plate (16), the other end of the elastic spring (17) is fixedly connected to the fixed block (5), one end of the C-shaped plate (16) is provided with an inclined plate (18), the end of the C-shaped plate (16) away from the inclined plate (18) is fixedly connected to the fixed plate (19), a plurality of clamping blocks (20) are evenly arranged on the fixed plate (19), the fixed plate (19) is slidably connected to the limit groove (4), a plurality of limit blocks (21) are evenly arranged in the limit groove (4), the limit block (21) is fixedly connected to the limit groove (4), and the clamping block (20) is clamped with the limit block (21).

4. The digital ultrasonic flaw detector that is easy to maintain according to claim 3 is characterized in that: The control component comprises a threaded rod (22), wherein the threaded rod (22) is threadedly connected to the fixed block (5), and one end of the threaded rod (22) away from the fixed block (5) is fixedly connected to a knob (23), and a baffle (24) is slidably connected in the movable groove (6), and one end of the baffle (24) away from the threaded rod (22) is fixedly connected to a return spring (25), and the other end of the return spring (25) is fixedly connected to the fixed block (5), and a side of the baffle (24) close to the return spring (25) is respectively fixedly connected to a limit plate (26) and an insertion rod (27), and the limit plate (26) and the insertion rod (27) are respectively symmetrically arranged, and a movable groove (28) is provided on the limit plate (26).

5. The digital ultrasonic flaw detector that is easy to maintain according to claim 4 is characterized in that: The limiting block (21) and the clamping block (20) are in the shape of a right triangle, and the limiting block (21) is in contact with the right-angled sides of the clamping block (20).

6. The digital ultrasonic flaw detector that is easy to maintain according to claim 5 is characterized in that: One end of the first rack (9) close to the slot (13) is fixedly connected to a limiting tooth (29).

7. The digital ultrasonic flaw detector that is easy to maintain according to claim 6 is characterized in that: The outer surface of the knob (23) is provided with a knurled groove (30).

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