A width depth accuracy standard device for a crack width gauge

Abstract

This application provides a standard device for the width and depth accuracy of a crack width gauge, including a detector and a detection conveyor belt. The upper end of the detection conveyor belt has lateral slots arranged at equal intervals, and the inner end of each lateral slot encloses the crack width gauge. The device also includes a measurement lifting assembly for lifting the crack width gauge at the measurement position. The lower end of the crack width gauge has an arc-shaped plate with a through-slot at its outer end and a positioning shaft at its inner end. The inner end of the arc-shaped plate has a moving slot, and the inner end of the moving slot has a positioning short rod. The outer end of the positioning short rod has a pushing rod, and the outer end of the pushing rod has a pushing slot. The inner end of the pushing slot has a pushing spring, and the outer end of the pushing rod has a pushing long rod. This application solves the problems of the inability to automatically move the crack width gauge up and down and the inability to perform multiple instance measurements of standard cracks, and the tendency for deviations to occur in single-model measurements.

Description

Technical Field

[0001] This invention relates to the field of standard testing technology for crack width gauges, and more specifically, to a standard device for the accuracy of width and depth of crack width gauges. Background Technology

[0002] Currently, crack width gauges often use surface ultrasonic testing when measuring the depth and internal tortuosity of cracks on building surfaces. For such equipment, during factory testing, it is often necessary to measure its standard measurement depth and width using the single-sided flat method so that the equipment can achieve accurate testing results when it is actually used after leaving the factory.

[0003] When using an ultrasonic crack width gauge, before measuring the depth of a concrete crack, a straight positioning line should be placed directly above and to the side of the measurement area. Then, the ultrasonic probe is placed close to the surface of the concrete crack, and the crack depth is measured by controlling the distance between the probe and the crack. To ensure measurement accuracy, the distance between the probe and the crack needs to be measured multiple times, and the average value is taken as the final measurement result. The analysis of the concrete crack depth measurement results can be done using ultrasonic images. For concrete cracks under normal conditions, the ultrasonic image appears as a straight line. For cracks with greater depth, the ultrasonic image will appear as a distinct arc or wave shape. By analyzing the appearance of the ultrasonic image, the depth and condition of the concrete crack can be accurately determined.

[0004] In existing technologies, the crack width gauge cannot automatically move up and down or be attached to the detector during standard testing. Furthermore, it cannot perform multi-case testing on standard cracks, and single-model testing is prone to deviations. Therefore, we propose an improvement to this problem by creating a standard device for the width and depth accuracy of crack width gauges. Summary of the Invention

[0005] The purpose of this invention is to address the problems of current standard crack width measuring instrument designs that cannot automatically move the crack width measuring instrument up and down and perform adsorption detection, and that standard crack measurements cannot be performed on multiple instances, with single-model detection easily leading to deviations.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A standard device for the accuracy of width and depth in crack width measuring instruments is proposed to improve the above-mentioned problems.

[0008] The application is as follows:

[0009] A standard device for the accuracy of width and depth of a crack width gauge includes a measuring instrument and a measuring conveyor belt. Lateral slots are evenly spaced at the upper end of the measuring conveyor belt, and the crack width gauge is wrapped around the inner end of each lateral slot. The device also includes:

[0010] The measuring lifting assembly is used to lift and detect the crack width gauge at the measuring position. The lower end of the crack width gauge is provided with an arc-shaped plate. The outer end of the arc-shaped plate is provided with a through groove. The inner end of the through groove is provided with a positioning shaft. The inner end of the arc-shaped plate is provided with a moving groove. The inner end of the moving groove is provided with a positioning short rod. The outer end of the positioning short rod is provided with a push rod. The outer end of the push rod is provided with a push groove. The inner end of the push groove is provided with a push spring. The outer end of the push rod is provided with a push long rod. The outer end of the push long rod is provided with an arc-shaped extrusion block.

[0011] The couplant circulation assembly is used for the recycling of couplant applied to the upper surface of the crack width measuring instrument. The couplant circulation assembly includes a couplant delivery port, a couplant recovery port, and a couplant circulation pipe. A one-way pump is installed in the couplant circulation pipe for unidirectional transmission from the couplant recovery port to the couplant delivery port. The couplant recovery port is hook-shaped, narrow at the bottom and wide at the top. The upper end of the couplant delivery port is provided with a couplant groove, and the upper end of the couplant groove is provided with a linkage threaded cylinder and a linkage threaded rod. The lower end of the couplant delivery port is provided with a movable opening.

[0012] As a preferred technical solution of this application, the arc plate rotates up and down along the through groove via the positioning shaft. The through groove passes through the outer surfaces of the upper and lower ends of the detection conveyor belt. The moving groove is embedded in the inner surface of one end of the arc plate. The inner end of the moving groove is slidably connected to the positioning short rod, and the outer end of the positioning short rod is fixedly connected to the push rod.

[0013] As a preferred technical solution of this application, the outer end of the push rod moves back and forth along the push groove, the push groove is embedded in the inner end of the detection conveyor belt, and the push groove passes through the transverse through groove and the lateral outer surface of the detection conveyor belt.

[0014] As a preferred technical solution of this application, the outer end of the push rod is fixedly connected to the push rod, the two sets of push rods are fixedly connected to the push rod, the outer end of the push rod is in contact with the arc-shaped extrusion block, and the arc-shaped extrusion block is fixed to the inner end of the detector, and the outer end of the push rod is wrapped with a push spring.

[0015] As a preferred technical solution of this application, it also includes: a crack model replacement component, used to replace models with different width and depth standards, to facilitate testing by the crack width measuring instrument. The crack model replacement component includes a standard crack model and a crack turntable. A spring groove, a spring plate and a connecting spring are provided between the standard crack model and the crack turntable. A positioning rod and a positioning groove are provided in the center of the crack turntable. A through groove is provided on the outer surface of one end of the crack turntable. A linkage rod is provided at the inner end of the through groove. A linkage groove is provided at one end of the linkage rod. The other end of the linkage rod is fixed on the corresponding crack turntable. The linkage groove is a combination of an upper ring and a lower rhombus structure.

[0016] As a preferred technical solution of this application, the standard crack model is slidably connected in the crack turntable. The center of the crack turntable is connected to the positioning rod through the positioning groove. The spring groove is embedded in the tail end of the standard crack model. The inner end of the spring groove is movably connected to the spring plate. The upper end of the spring plate is movably connected to the crack turntable through the connecting spring.

[0017] As a preferred technical solution of this application, the through groove extends through the outer surfaces of both ends of the crack turntable, the linkage rod is wrapped in the through groove and the linkage groove, the linkage groove is embedded in the inner end of the detector, and the outer end of the crack turntable is provided with a trough.

[0018] As a preferred technical solution of this application, the lower end of the linkage threaded rod is provided with an elastic telescopic component, which is used to inject the coupling agent circulating in the coupling agent circulation tube during the downward pressing process.

[0019] As a preferred technical solution of this application, the upper end of the linkage threaded rod is provided with a second bevel gear, the upper end of the second bevel gear is provided with a first bevel gear, and the outer end of the first bevel gear is provided with an electric motor.

[0020] As a preferred technical solution of this application, a material coating structure is also provided between the crack standard model and the crack turntable. The material coating structure is used to coat the four sides of the crack standard model with boundary material during the crack standard model detection. The material coating structure includes a linkage rope located inside the connecting spring. A moving rope is provided at the upper end of the linkage rope. A cable drum is provided between the linkage rope and the moving rope. A positioning ring is provided at the lower end of the moving rope. A material liquid cylinder is provided at the outer end of the positioning ring. A silicone square groove is provided at the head end of the material liquid cylinder. A cylinder rod is provided at the inner end of the material liquid cylinder. A side groove is provided at the outer end of the cylinder rod.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In the scheme of this application:

[0023] By incorporating a pusher arc plate, a through groove, a positioning shaft, a moving groove, a positioning short rod, a pusher rod, a pusher spring, a pusher groove, a pusher long rod, and an arc-shaped extrusion block, the crack width gauge can be easily moved upwards for testing during its movement, eliminating the need for a power component and achieving energy savings. This also avoids damage to the crack width gauge caused by the power component moving it up and down. The detection conveyor belt pushes the pusher long rod into contact with the arc-shaped extrusion block. When the center of the arc-shaped extrusion block contacts the center of the pusher long rod, the two sets of pushers connected to the outer end of the pusher long rod ensure the maximum push distance. The positioning short rod at the end of the pusher rod moves along the moving groove to the bottom, causing the pusher arc plate, linked by the positioning shaft, to rotate upwards at a right angle. The upper end of the pusher arc plate then pushes the corresponding set of crack width gauges to the highest point for testing. After testing, the crack width gauge retracts along the rotation of the pusher arc plate and enters the lateral groove, achieving post-test positioning.

[0024] By using a set of crack standard models, crack turntables, spring grooves, spring plates, connecting springs, positioning rods, positioning slots, bucket slots, linkage slide rods, linkage slides, and through slides, when standard testing of crack width gauges is required, in order to cope with different crack requirements and measurement ranges of width and depth, the positioning rods are connected to the positioning slots. On the outside of the positioning rods, a power component such as a motor drives the positioning rods to rotate. The rotation of the positioning rods drives the crack turntable to rotate. When the crack turntable rotates, the corresponding crack standard models rotate in and out of the crack turntable under the limit of the linkage slide rods along the linkage slides and through slides. When the crack standard models move inward, they can be retracted and positioned by the connecting springs connected by the spring grooves and spring plates, ensuring that multiple sets of standard cracks can be measured, which facilitates the testing of the measurement range of the crack width gauge.

[0025] The system includes a couplant delivery port, a couplant recovery port, a couplant circulation pipe, an electric motor, a first bevel gear, a second bevel gear, a linkage threaded rod, a linkage threaded cylinder, a connecting couplant tank, and a movable opening. When a crack width gauge is used for testing, preparation and cleaning are required beforehand and afterward. The electric motor drives the linkage threaded rod, connected to the first and second bevel gears, to move up and down along the linkage threaded cylinder. This pushes the couplant in the connecting couplant tank along the couplant delivery port, dripping through the movable opening onto the upper outer surface of the crack width gauge. This facilitates convenient transmission when the crack width gauge is measuring its standard value. After the crack width gauge completes the test, the couplant is recovered through the hook-shaped couplant recovery port. The couplant circulation pipe and one-way pump facilitate the recovery of the couplant for future use. The couplant is then directly injected into the connecting couplant tank through the couplant circulation pipe. The elastic telescopic component at the lower end of the linkage threaded rod allows for easy adjustment of the liquid level in the entire chamber. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of a width and depth accuracy standard device for a crack width measuring instrument provided in this application;

[0027] Figure 2 A front-section left-view structural schematic diagram of a standard device for the width and depth accuracy of a crack width measuring instrument provided in this application;

[0028] Figure 3 A cross-sectional enlarged schematic diagram of the detection conveyor belt of a standard device for the width and depth accuracy of a crack width gauge provided in this application;

[0029] Figure 4 This application provides a standard device for the accuracy of width and depth in a crack width measuring instrument. Figure 3 A magnified structural diagram of A in the middle;

[0030] Figure 5 This application provides a standard device for the accuracy of width and depth in a crack width measuring instrument. Figure 2 Schematic diagram of the connection structure between the arc-shaped plate and the crack width measuring instrument;

[0031] Figure 6 A side-section diagram of the coupling agent circulation tube for a standard device for the width and depth accuracy of a crack width gauge provided in this application;

[0032] Figure 7 A side cross-sectional view of the coupling agent delivery port of a standard device for the width and depth accuracy of a crack width gauge provided in this application;

[0033] Figure 8 A partial cross-sectional structural diagram of a linkage slide for a width and depth accuracy standard device for a crack width measuring instrument provided in this application;

[0034] Figure 9 A schematic diagram of the central front section structure of a crack turntable for a standard device for the accuracy of the width and depth of a crack width gauge, provided in this application;

[0035] Figure 10 A cross-sectional plan view of a crack standard model for a crack width and depth accuracy standard device for a crack width gauge provided in this application;

[0036] Figure 11 A schematic diagram of the side cross-section of the linkage rope of a standard device for the width and depth accuracy of a crack width measuring instrument provided in this application;

[0037] Figure 12 This application provides a standard device for the accuracy of width and depth in a crack width measuring instrument. Figure 11 A magnified structural diagram of B in the diagram;

[0038] Figure 13 This application provides a schematic diagram of the cross-sectional structure of a cylinder rod for a standard device for measuring the width and depth accuracy of a crack width gauge.

[0039] The image shows:

[0040] 1. Detector; 2. Detection conveyor belt; 3. Lateral slot; 4. Crack width gauge; 5. Coupling agent delivery port; 6. Coupling agent recovery port; 7. Coupling agent circulation pipe; 18. Electric motor; 19. First bevel gear; 20. Second bevel gear; 21. Linkage threaded rod; 22. Linkage threaded cylinder; 23. Connecting couplant tank; 24. Movable opening; 8. Arc plate; 9. Through slot; 10. Positioning shaft; 11. Moving slot; 12. Positioning short rod; 13. Push rod; 14. Push spring 15. Spring; 16. Push groove; 17. Push rod; 28. Arc-shaped extrusion block; 29. ​​Crack standard model; 20. Crack turntable; 21. Spring groove; 22. Spring plate; 33. Connecting spring; 34. Positioning rod; 35. Positioning groove; 36. Bucket groove; 37. Linkage slide rod; 38. Linkage slide groove; 49. Through slide groove; 40. Linkage rope; 41. Direction rope; 42. Hub drum; 43. Side groove; 44. Cylinder rod; 45. Material liquid cylinder; 46. Silicone square groove; 47. Positioning ring. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to illustrate some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments, features, and technical solutions in the embodiments of the present invention can be combined with each other.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] like Figure 1-5As shown, this embodiment proposes a standard device for the accuracy of the width and depth of a crack width gauge, including a detector 1 and a detection conveyor belt 2. Lateral slots 3 are evenly spaced at the upper end of the detection conveyor belt 2, and a crack width gauge 4 is wrapped around the inner end of each lateral slot 3. The device also includes:

[0045] A measuring lifting assembly is used to lift and detect the crack width measuring instrument 4 at the measuring position. The lower end of the crack width measuring instrument 4 is provided with an arc plate 8. The outer end of the arc plate 8 is provided with a through groove 9. The inner end of the through groove 9 is provided with a positioning shaft 10. The inner end of the arc plate 8 is provided with a moving groove 11. The inner end of the moving groove 11 is provided with a positioning short rod 12. The outer end of the positioning short rod 12 is provided with a push rod 13. The outer end of the push rod 13 is provided with a push groove 15. The inner end of the push groove 15 is provided with a push spring 14. The outer end of the push rod 13 is provided with a push long rod 16. The outer end of the push long rod 16 is provided with an arc-shaped extrusion block 17.

[0046] The arc plate 8 rotates up and down along the through groove 9 via the positioning shaft 10. The through groove 9 passes through the outer surfaces of the upper and lower ends of the detection conveyor belt 2. The moving groove 11 is embedded in the inner surface of one end of the arc plate 8. The inner end of the moving groove 11 is slidably connected to the positioning short rod 12, and the outer end of the positioning short rod 12 is fixedly connected to the push rod 13.

[0047] The outer end of the push rod 13 moves back and forth along the push groove 15, which is embedded in the inner end of the detection conveyor belt 2, and the push groove 15 passes through the transverse through groove 9 and the lateral outer surface of the detection conveyor belt 2.

[0048] The push groove 15 is designed to provide space for the push rod 13 to push.

[0049] The outer end of the push rod 13 is fixedly connected to the push rod 16, and the two sets of push rods 13 are fixedly connected to the push rod 16. The outer end of the push rod 16 is in contact with the arc-shaped extrusion block 17, and the arc-shaped extrusion block 17 is fixed to the inner end of the detector 1.

[0050] The arc-shaped extrusion block 17 is fixed to the inner end of the detector 1, and there are two sets of them, which operate the two crack width measuring instruments 4 in each set simultaneously.

[0051] The push rod 13 is designed to greatly ensure the vertical movement of the crack width measuring instrument 4.

[0052] The outer end of the push rod 13 is wrapped with a push spring 14. The push spring 14 facilitates the rebound of the push rod 16 after it comes into contact with the arc-shaped extrusion block 17.

[0053] When the crack width gauge 4 needs to be moved upwards automatically for testing without the need for a power component, it achieves energy saving and avoids damage to the crack width gauge 4 caused by the power component moving it up and down. At this time, the detection conveyor belt 2 pushes the long push rod 16 to contact the arc-shaped extrusion block 17. When the center of the arc-shaped extrusion block 17 contacts the center of the long push rod 16, the two sets of push rods 13 connected to the outer end of the long push rod 16 ensure the maximum push distance. At this time, the positioning short rod 12 at the tail end of the push rod 13 moves to the lowest point along the moving groove 11, driving the arc plate 8 linked by the positioning shaft 10 to rotate upwards at a right angle. At this time, the upper end of the arc plate 8 pushes the corresponding set of crack width gauges 4 to be tested to the highest point to participate in the test. After the test is completed, the crack width gauge 4 is retracted along the rotation of the arc plate 8 and enters the side groove 3 to achieve post-test positioning.

[0054] like Figure 8-9 As shown, in a preferred embodiment, based on the above method, a further crack model replacement component is provided for replacing models with different widths and depths, facilitating testing by the crack width measuring instrument 4. The crack model replacement component includes a standard crack model 25 and a crack turntable 26. A spring groove 27, a spring plate 28, and a connecting spring 29 are provided between the standard crack model 25 and the crack turntable 26. A positioning rod 30 and a positioning groove 31 are provided in the center of the crack turntable 26. A through groove 35 is provided on the outer surface of one end of the crack turntable 26. A linkage rod 33 is provided at the inner end of the through groove 35. A linkage groove 34 is provided at one end of the linkage rod 33. The other end of the linkage rod 33 is fixed on the corresponding crack turntable 26. The linkage groove 34 is a combination of an upper ring and a lower rhombus structure.

[0055] The standard crack model 25 is slidably connected in the crack turntable 26. The center of the crack turntable 26 is connected to the positioning rod 30 through the positioning groove 31. The spring groove 27 is embedded in the tail end of the standard crack model 25. The inner end of the spring groove 27 is movably connected to the spring plate 28. The upper end of the spring plate 28 is movably connected to the crack turntable 26 through the connecting spring 29.

[0056] The standard crack model 25 slides along the inner end of the crack turntable 26, but the sliding is limited by space and the connecting spring 29.

[0057] The through groove 35 passes through the outer surfaces of both ends of the crack turntable 26. The linkage rod 33 is wrapped in the through groove 35 and the linkage groove 34. The linkage groove 34 is embedded in the inner end of the detector 1. The outer end of the crack turntable 26 is provided with a trough 32.

[0058] For the material selection of the crack width measurement module 25, we used existing C30 and C35 concrete blocks, which are easy to adapt to the existing measurement environment and improve the accuracy of crack width measurement.

[0059] When standard testing is required for the crack width gauge 4, in order to meet different crack requirements and measurement ranges of width and depth, the positioning rod 30 is connected to the positioning groove 31. The positioning rod 30 is rotated by a power component such as a motor on the outside of the positioning rod 30. The rotation of the positioning rod 30 drives the crack turntable 26 to rotate. When the crack turntable 26 rotates, the corresponding crack standard model 25 rotates inside and outside the crack turntable 26 under the limit of the linkage slide rod 33 along the linkage slide groove 34 and the through slide groove 35. When the crack standard model 25 moves inward, it can be retracted and positioned by the connecting spring 29 connected by the spring groove 27 and the spring plate 28, which ensures that multiple sets of standard cracks can be measured, and facilitates the detection of the measurement range of the crack width gauge 4.

[0060] For the detection of different crack widths and depths, based on existing technology and environmental factors, the crack width is ensured to be between 0.02mm and 10mm.

[0061] In the application of the standard crack model 25, the table of crack line spacing data in the standard crack model 25 is as follows:

[0062]

[0063] The dimensions of the standard crack model 25 are set as follows:

[0064]

[0065] In the standard crack model 25, when the crack depth is no greater than 200 mm, the width at the bottom of the crack is no greater than 2 mm, and when the crack depth is greater than 200 mm, the width at the bottom of the crack is no greater than 3 mm.

[0066] In standardized testing, when the length, width, and height data of the standard crack model 25 are consistent, a portion of the test data is as follows:

[0067]

[0068] The overall test data allows for the measurement of extreme values ​​of the standard model of crack width, ensuring that the standard testing performance of the detector 1 is stable when it leaves the factory.

[0069] like Figure 6-7As shown, in a preferred embodiment, based on the above method, a further coupling agent circulation assembly is provided for the recycling of the coupling agent applied to the upper surface of the crack width measuring instrument 4. The coupling agent circulation assembly includes a coupling agent delivery port 5, a coupling agent recovery port 6, and a coupling agent circulation pipe 7. A one-way pump is provided in the coupling agent circulation pipe 7 for one-way transmission from the coupling agent recovery port 6 to the coupling agent delivery port 5. The coupling agent recovery port 6 is configured as a hook shape that is narrow at the bottom and wide at the top. The upper end of the coupling agent delivery port 5 is provided with a coupling agent groove 23. The upper end of the coupling agent groove 23 is provided with a linkage threaded cylinder 22 and a linkage threaded rod 21. The lower end of the coupling agent delivery port 5 is provided with a movable opening 24. The lower end of the linkage threaded rod 21 is provided with an elastic telescopic member for injecting the coupling agent circulating in the coupling agent circulation pipe 7 during the downward squeezing process.

[0070] The upper end of the linkage threaded rod 21 is provided with a second bevel gear 20, the upper end of the second bevel gear 20 is provided with a first bevel gear 19, and the outer end of the first bevel gear 19 is provided with an electric motor 18.

[0071] When the crack width measuring instrument 4 needs to be tested, preparation and cleaning are required. At this time, the operation of the electric motor 18 drives the linkage threaded rod 21 connected to the first bevel gear 19 and the second bevel gear 20 to move up and down along the linkage threaded cylinder 22. This pushes the coupling agent in the coupling agent tank 23 along the coupling agent delivery port 5 and drips onto the upper outer surface of the crack width measuring instrument 4 through the movable opening 24. This facilitates the transmission of the coupling agent when the crack width measuring instrument 4 is testing its standard quantity. After the crack width measuring instrument 4 has completed the test, the coupling agent is recovered through the hook-shaped coupling agent recovery port 6. With the action of the coupling agent circulation pipe 7 and the one-way pump, the coupling agent is easily recovered for the next use. The coupling agent is also directly injected into the coupling agent tank 23 through the coupling agent circulation pipe 7. The elastic telescopic part at the lower end of the linkage threaded rod 21 makes it easy to adjust the liquid level of the entire cavity.

[0072] like Figure 10-13 As shown, in a preferred embodiment, based on the above method, a material coating structure is further provided between the crack standard model 25 and the crack turntable 26. The material coating structure is used to coat the four sides of the crack standard model 25 with boundary material during the detection. The material coating structure includes a linkage rope 36 located in the connecting spring 29. The upper end of the linkage rope 36 is provided with a moving rope 37. A cable drum 38 is provided between the linkage rope 36 and the moving rope 37. The lower end of the moving rope 37 is provided with a positioning ring 43. The outer end of the positioning ring 43 is provided with a material liquid cylinder 41. The head end of the material liquid cylinder 41 is provided with a silicone square groove 42. The inner end of the material liquid cylinder 41 is provided with a cylinder rod 40. The outer end of the cylinder rod 40 is provided with a side groove 39.

[0073] During the testing process of the crack width measuring instrument 4, the four sides of the crack standard model 25 to be measured are coated with a material coating structure. This ensures that the surrounding cracks are blocked by the material during testing, preventing the crack width measuring instrument 4 from detecting gaps not around the crack standard model through sound waves or other means, which would cause inaccurate test results. As the crack standard model 25 to be tested moves downward, the corresponding linkage rope 36 is pulled downward. At this time, the moving rope 37 in the hub 38 pushes the positioning ring 43 upward. The material liquid cylinder 41 driven by the positioning ring 43 rotates downward under the limit of the cylinder rod 40, pushing the silicone square groove 42 to contact the four sides of the crack standard model 25. During the compression process between the two, the corresponding material liquid is squeezed out from the silicone square groove 42 and coated on the four sides of the crack standard model 25, thus ensuring the stability of the test.

[0074] When testing the standard model, the material liquid is coated on the four sides of the crack standard model 25, which can ensure that the measurement range is increased. In the test after coating, the testing device can ensure the model range of the crack standard model 25 and will not produce missed or false detection. Based on the testing range exceeding the national standard, the pass rate of the testing instrument 1 can be increased.

[0075] In use, this application utilizes an electric motor 18 to drive the linkage threaded rod 21, connected to the first bevel gear 19 and the second bevel gear 20, to move up and down along the linkage threaded cylinder 22. This pushes the coupling agent in the coupling agent tank 23 along the coupling agent delivery port 5, dripping through the movable opening 24 onto the upper outer surface of the crack width measuring instrument 4. This facilitates convenient transmission when the crack width measuring instrument 4 is measuring its standard value. When the crack width measuring instrument 4 needs to be moved upwards during operation for testing, it can move automatically without the need for a power component, achieving energy saving and avoiding the need for a power component. When the crack width measuring instrument 4 moves up and down, damage to the crack width measuring instrument 4 is prevented. At this time, the detection conveyor belt 2 pushes the long push rod 16 to contact the arc-shaped extrusion block 17. When the center of the arc-shaped extrusion block 17 contacts the center of the long push rod 16, the two sets of push rods 13 connected to the outer end of the long push rod 16 ensure the maximum push distance. At this time, the positioning short rod 12 at the tail end of the push rod 13 moves to the lowest end along the moving groove 11, causing the arc plate 8, which is linked by the positioning shaft 10, to rotate upward at a right angle. At this time, the upper end of the arc plate 8 pushes the corresponding set of cracks to be detected. The seam width measuring instrument 4 reaches its highest point for detection; it is connected to the positioning groove 31 via the positioning rod 30. A power component, such as a motor, drives the positioning rod 30 to rotate on its outer side. The rotation of the positioning rod 30 drives the rotation of the crack turntable 26. When the crack turntable 26 rotates, the corresponding crack standard model 25 rotates inward and outward along the crack turntable 26, limited by the linkage slide rod 33 along the linkage slide groove 34 and the through slide groove 35. Furthermore, when the crack standard model 25 moves inward, it can be repositioned by the connecting spring 29 connected to the spring groove 27 and the spring plate 28, ensuring... Multiple sets of standard cracks are measured to facilitate the detection of the measurement range of the crack width measuring instrument 4. After the detection is completed, the crack width measuring instrument 4 is retracted along the rotation of the arc plate 8 and enters the lateral slot 3 to achieve post-detection positioning. After the crack width measuring instrument 4 completes the detection, it is retrieved through the hook-shaped couplant recovery port 6. With the action of the couplant circulation pipe 7 and the one-way pump, the couplant is easily retrieved for future use. It is also directly injected into the couplant tank 23 through the couplant circulation pipe 7. The liquid level of the entire cavity can be easily adjusted through the elastic telescopic component at the lower end of the linkage threaded rod 21.

[0076] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A standard device for the accuracy of width and depth of a crack width measuring instrument, comprising a measuring instrument (1) and a measuring conveyor belt (2), characterized in that, The upper end of the detection conveyor belt (2) is provided with lateral slots (3) arranged at equal intervals, and the inner end of the lateral slots (3) is wrapped with a crack width measuring instrument (4). The belt also includes: A measuring lifting assembly is used to lift and detect the crack width measuring instrument (4) at the measuring position. The lower end of the crack width measuring instrument (4) is provided with an arc plate (8). The outer end of the arc plate (8) is provided with a through groove (9). The inner end of the through groove (9) is provided with a positioning shaft (10). The inner end of the arc plate (8) is provided with a moving groove (11). The inner end of the moving groove (11) is provided with a positioning short rod (12). The outer end of the positioning short rod (12) is provided with a push rod (13). The outer end of the push rod (13) is provided with a push groove (15). The inner end of the push groove (15) is provided with a push spring (14). The outer end of the push rod (13) is provided with a push long rod (16). The outer end of the push long rod (16) is provided with an arc-shaped extrusion block (17). The coupling agent circulation assembly is used for the circulation of coupling agent applied to the upper surface of the crack width measuring instrument (4). The coupling agent circulation assembly includes a coupling agent delivery port (5), a coupling agent recovery port (6), and a coupling agent circulation pipe (7). A one-way pump is provided in the coupling agent circulation pipe (7) for one-way transmission from the coupling agent recovery port (6) to the coupling agent delivery port (5). The coupling agent recovery port (6) is configured as a hook shape that is narrow at the bottom and wide at the top. The upper end of the coupling agent delivery port (5) is provided with a connecting coupling agent groove (23). The upper end of the connecting coupling agent groove (23) is provided with a linkage threaded cylinder (22) and a linkage threaded rod (21). The lower end of the coupling agent delivery port (5) is provided with a movable opening (24).

2. The width and depth accuracy standard device for a crack width measuring instrument according to claim 1, characterized in that, The arc plate (8) rotates up and down along the through groove (9) via the positioning shaft (10). The through groove (9) passes through the outer surfaces of the upper and lower ends of the detection conveyor belt (2). The moving groove (11) is embedded in the inner surface of one end of the arc plate (8). The inner end of the moving groove (11) is slidably connected to the positioning short rod (12). The outer end of the positioning short rod (12) is fixedly connected to the push rod (13).

3. The width and depth accuracy standard device for a crack width measuring instrument according to claim 2, characterized in that, The outer end of the push rod (13) moves back and forth along the push groove (15), the push groove (15) is embedded in the inner end of the detection conveyor belt (2), and the push groove (15) extends along the transverse through groove (9) and the lateral outer surface of the detection conveyor belt (2).

4. The width and depth accuracy standard device for a crack width measuring instrument according to claim 3, characterized in that, The outer end of the push rod (13) is fixedly connected to the push rod (16), and the two sets of push rods (13) are fixedly connected to one set of push rods (16). The outer end of the push rod (16) is in contact with the arc-shaped extrusion block (17), and the arc-shaped extrusion block (17) is fixed to the inner end of the detector (1). The outer end of the push rod (13) is wrapped with a push spring (14).

5. The width and depth accuracy standard device for a crack width measuring instrument according to claim 4, characterized in that, Also includes: A crack model replacement component is used to replace models with different width and depth standards, which facilitates the testing of the crack width measuring instrument (4). The crack model replacement component includes a crack standard model (25) and a crack turntable (26). A spring groove (27), a spring plate (28) and a connecting spring (29) are provided between the crack standard model (25) and the crack turntable (26). A positioning rod (30) and a positioning groove (31) are provided in the center of the crack turntable (26). A through groove (35) is provided on the outer surface of one end of the crack turntable (26). A linkage rod (33) is provided at the inner end of the through groove (35). A linkage groove (34) is provided at one end of the linkage rod (33). The other end of the linkage rod (33) is fixed on the corresponding crack turntable (26). The linkage groove (34) is a combination of an upper ring and a lower rhombus structure.

6. The width and depth accuracy standard device for a crack width measuring instrument according to claim 5, characterized in that, The standard crack model (25) is slidably connected in the crack turntable (26). The center of the crack turntable (26) is connected to the positioning rod (30) through the positioning groove (31). The spring groove (27) is embedded in the tail end of the standard crack model (25). The inner end of the spring groove (27) is movably connected to the spring plate (28). The upper end of the spring plate (28) is movably connected to the crack turntable (26) through the connecting spring (29).

7. The width and depth accuracy standard device for a crack width measuring instrument according to claim 6, characterized in that, The through groove (35) passes through the outer surfaces of both ends of the crack turntable (26), the linkage rod (33) is wrapped in the through groove (35) and the linkage groove (34), the linkage groove (34) is embedded in the inner end of the detector (1), and the outer end of the crack turntable (26) is provided with a trough (32).

8. The width and depth accuracy standard device for a crack width measuring instrument according to claim 7, characterized in that, The lower end of the linkage threaded rod (21) is provided with an elastic telescopic component, which is used to inject the coupling agent circulating in the coupling agent circulation pipe (7) during the downward pressing process.

9. A standard device for the accuracy of width and depth in a crack width measuring instrument according to claim 8, characterized in that, The upper end of the linkage threaded rod (21) is provided with a second bevel gear (20), the upper end of the second bevel gear (20) is provided with a first bevel gear (19), and the outer end of the first bevel gear (19) is provided with an electric motor (18).

10. A width and depth accuracy standard device for a crack width measuring instrument according to claim 9, characterized in that, A material coating structure is provided between the crack standard model (25) and the crack turntable (26). The material coating structure is used to coat the four sides of the crack standard model (25) with boundary material during the detection. The material coating structure includes a linkage rope (36) located in the connecting spring (29). The upper end of the linkage rope (36) is provided with a moving rope (37). A cable drum (38) is provided between the linkage rope (36) and the moving rope (37). The lower end of the moving rope (37) is provided with a positioning ring (43). The outer end of the positioning ring (43) is provided with a material liquid cylinder (41). The head end of the material liquid cylinder (41) is provided with a silicone square groove (42). The inner end of the material liquid cylinder (41) is provided with a cylinder rod (40). The outer end of the cylinder rod (40) is provided with a side groove (39).

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