Nondestructive testing device for tensile strength of steel

Abstract

The invention relates to the technical field of steel detection, in particular to a steel tensile strength nondestructive testing device which comprises a numerical control machine tool, a placement table is fixedly connected to the surface of the numerical control machine tool, a supporting plate is fixedly connected to the surface of the numerical control machine tool, and a clutch mechanism is arranged in the numerical control machine tool. A disconnection mechanism is mounted on the surface of the numerical control machine tool, a clamping mechanism is slidably connected to the surface of the numerical control machine tool, and a tension mechanism is arranged in the clamping mechanism. According to the device, the groove rotating roller rotates anticlockwise, so that horizontal pulling force can be applied to steel in the clamping plate during detection, the pressure caused by perpendicularity is reduced, the situation that the surface of a steel plate is pressed to be sunken due to the fact that the clamping plate brings too large pressure is avoided, the groove rotating roller has high friction force, meanwhile, the steel can be relatively pulled again, and the detection accuracy is improved. And the toughness detection efficiency can be improved on the original basis.

Description

Technical Field

[0001] The invention relates to the technical field of steel material detection, in particular to a nondestructive detection device for tensile strength of steel material. Background Art

[0002] In the fields of construction, bridges, machinery manufacturing, etc., steel is widely used as a structural material, and steel is the main structural material. For example, in high-rise buildings, the frame structure composed of steel bears the building's own weight and various external loads. Ensuring that the tensile strength of steel meets the design requirements is the key to ensuring building safety. For these installed or in-use steel structures, a non-destructive testing device that can quickly and accurately detect their tensile strength on site is required, so as to promptly discover potential safety hazards and ensure the safety and reliability of the structure.

[0003] The existing patent (publication number: CN111610088A) discloses a steel strength detection device for construction inspection, including a box body, a braking structure, a height adjustment structure, a first driving motor, a first straight plate, a first rotating rod, a first rotating rod having a first thread groove, a slider, a rotating plate on the top of the slider, a driven gear ring, a first driving motor having an active gear ring, the active gear ring is connected to the driven gear ring, a rotating plate has a convex block, a supporting plate has a supporting plate, a guiding mechanism, a second driving motor has a second driving motor, a second rotating rod has a second thread groove, and the second rotating rod has multiple specifications of clamping Structure, the box has a controller and a Z-shaped support plate, the Z-shaped support plate has a cylinder, the cylinder has a connecting plate, and the connecting plate has a pressure plate. When the above-mentioned steel strength detection device for construction inspection is rotated to the lowermost end through the straight clamping plate, the straight clamping plates are suitable for fixing steel sections or steel plates. The hollow tube connecting cone, the solid cylindrical connecting cone and the straight clamping plate are used in combination, so that the device is suitable for fixing steel of different specifications, so that it is suitable for strength detection of steel of different specifications. Although this method is accurate and reliable, it is a destructive detection and will cause damage to the steel. For steel structural parts that have been installed and used or steel products that are not convenient for sampling, the clamping mechanism will cause great pressure on the surface of the steel, which may cause dents on the surface of the steel. Summary of the invention

[0004] The object of the present invention is to provide a nondestructive testing device for the tensile strength of steel to solve the problems raised in the above background technology. To achieve the above object, the present invention provides the following technical solutions: a nondestructive testing device for the tensile strength of steel, comprising a CNC machine tool, a placing table is fixedly connected to the surface of the CNC machine tool, a support plate is fixedly connected to the surface of the CNC machine tool, a clutch mechanism is arranged inside the CNC machine tool, a disconnection mechanism is installed on the surface of the CNC machine tool, a clamping mechanism is slidably connected to the surface of the CNC machine tool, a tension mechanism is arranged inside the clamping mechanism, and a stabilizing mechanism is rotatably connected to the surface of the clamping mechanism.

[0005] Preferably, the clutch mechanism has a T-slot on its surface, the T-slot is opened inside a CNC machine tool, a screw rod is rotatably connected inside the T-slot, a driving spline shaft is rotatably connected inside the CNC machine tool, a sleeve rod is slidably connected to the surface of the driving spline shaft, one end of the sleeve rod is fixedly connected to a first clutch disk, one end of the screw rod is fixedly connected to a second clutch disk, and a ring member is rotatably connected to the surface of the sleeve rod.

[0006] Preferably, the disconnecting mechanism includes a support rod, which is fixedly connected to the surface of the CNC machine tool, the upper end of the support rod is hinged with a ramp rod, the lower end of the ramp rod is fixedly connected with a triangular block, the upper end of the annular member is fixedly connected with a ramp block, the side of the annular member is fixedly connected with a telescopic rod, the surface of the telescopic end of the telescopic rod is provided with a telescopic spring, and the surface of the telescopic rod is fixedly connected with an inclined rod.

[0007] Preferably, the clamping mechanism includes a T-shaped support, which is threaded on the surface of the screw rod and slidably connected inside the T-slot. The upper end of the T-shaped support is fixedly connected to a trapezoidal block, the interior of the trapezoidal block is fixedly connected to a CNC cylinder, one end of the CNC cylinder is fixedly connected to a T-rod, the interior of the trapezoidal block is rotatably connected to a fan gear, a connecting rod is rotatably connected between the fan gear and the T-rod, the interior of the trapezoidal block is slidably connected to a clamping plate, one end of the clamping plate is fixedly connected to teeth, and the interior of the trapezoidal block is fixedly connected to a limited position slide rail.

[0008] Preferably, the pulling mechanism includes a grooved roller, which is rotatably connected inside the clamping plate, a rotating rod is fixedly connected to the side of the main rotating shaft of the grooved roller, an L-shaped rod is fixedly connected to one end of the rotating rod, a pinion is fixedly connected to the surface of the rotating rod, and a bevel groove is provided on the surface of the support plate.

[0009] Preferably, the stabilizing mechanism comprises an arc rod, which is rotatably connected to the surface of the trapezoidal block, the trapezoidal block is rotatably connected to a trigger plate inside, the side of the arc rod main rotating shaft is fixedly connected to a special-shaped clamping rod, a spring 1 is connected between the special-shaped clamping rod and the trapezoidal block, the side of the trapezoidal block is fixedly connected to a slide groove, the slide groove is slidably connected to a clamping block, the surface of the clamping block is provided with an inclined groove, a spring 2 is arranged inside the slide groove, the surface of the trapezoidal block is fixedly connected to a limiting slide groove, the limiting slide groove is slidably connected to an L-shaped rod 2, and a connecting rod 2 is rotatably connected between one end of the main rotating shaft of the trigger plate and the L-shaped rod 2.

[0010] Preferably, the clamping plate is slidably connected to the surface of the limiting slide rail, and the teeth are meshed with the sector gear.

[0011] Preferably, the plane of the special-shaped clamping rod and the plane of the clamping block are in contact with each other in an initial state, thereby blocking each other.

[0012] In the present invention, the grooved roller rotates counterclockwise, so that horizontal pulling force can be applied to the steel in the clamping plate during detection, thereby reducing the vertical pressure and preventing the clamping plate from bringing excessive pressure to cause the surface of the steel plate to be depressed. The grooved roller has a higher friction force and can relatively pull the steel again, thereby increasing the efficiency of toughness detection on the original basis.

[0013] In the present invention, the front end of the telescopic rod is popped out by the telescopic spring, and at the same time, the annular part is pushed to slide inside the T-slot, and the sleeve rod at the lower end is driven to move at the same time. The sleeve rod slides on the surface of the driving spline shaft, and drives the first clutch disk to slide and separate from the second clutch disk. At this time, the screw rod will lose its power source, and the entire device will stop testing, which is regarded as a qualified test, thereby increasing the service life.

[0014] In the present invention, when the L-shaped rod slides, it will slide in the inclined groove opened in the block and squeeze the inclined surface of the inclined groove to drive the block to slide. The block slides inside the slide groove and is separated from the special-shaped clamping rod. The special-shaped clamping rod rotates through the spring, and at the same time drives the arc rod to rotate clockwise. The arc rod on the clamping plate at the lower end rotates counterclockwise to further clamp the broken steel and prevent the broken steel from flying around, thereby causing a safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention; Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the CNC machine tool of the present invention; Figure 4 It is a schematic diagram of the structure of the clutch mechanism of the present invention; Figure 5 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part; Figure 6 It is a schematic diagram of the structure of the disconnection mechanism of the present invention; Figure 7 It is a schematic diagram of the structure of the clamping mechanism of the present invention; Figure 8 It is a schematic diagram of the side cross-sectional structure of the clamping mechanism of the present invention; Fig. 9 It is a schematic diagram of the partial structure of the clamping mechanism of the present invention; Fig.10 It is a schematic diagram of the internal structure of the clamping mechanism of the present invention; Fig.11 It is a schematic diagram of the internal cross-sectional structure of the trapezoidal block of the present invention; Fig.12 This is a schematic diagram of the side structure of the support plate of the present invention; Fig.13 It is a schematic diagram of the structure of the stabilizing mechanism of the present invention; Fig.14 For the present invention Fig.13 Schematic diagram of the enlarged structure of B.

[0016] In the figure: 1, CNC machine tool; 2, placing table; 3, support plate; 4, clutch mechanism; 5, disconnection mechanism; 6, clamping mechanism; 7, tension mechanism; 8, stabilizing mechanism; 41, T-slot; 42, screw rod; 43, driving spline shaft; 44, sleeve rod; 45, first clutch plate; 46, second clutch plate; 47, ring member; 51, support rod; 52, inclined rod; 53, triangular block; 54, inclined block; 55, telescopic rod; 56, telescopic spring; 57, inclined rod; 61, T-shaped support member; 62 , trapezoidal block; 63, CNC cylinder; 64, limit slide; 65, T-bar; 66, sector gear; 67, connecting rod one; 68, clamping plate; 69, teeth; 71, groove roller; 72, rotating rod; 73, L-shaped rod one; 74, small gear; 75, inclined groove; 81, arc rod; 82, trigger plate; 83, special-shaped clamping rod; 84, spring one; 85, slide; 86, clamping block; 87, inclined groove; 88, spring two; 89, limit slide; 810, L-shaped rod two; 811, connecting rod two. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 14 The present invention provides a technical solution: a nondestructive testing device for tensile strength of steel, comprising a numerically controlled machine tool 1, a placing table 2 is fixedly connected to the surface of the numerically controlled machine tool 1, a supporting plate 3 is fixedly connected to the surface of the numerically controlled machine tool 1, a clutch mechanism 4 is arranged inside the numerically controlled machine tool 1, a disconnecting mechanism 5 is installed on the surface of the numerically controlled machine tool 1, a clamping mechanism 6 is slidably connected to the surface of the numerically controlled machine tool 1, a tension mechanism 7 is arranged inside the clamping mechanism 6, and a stabilizing mechanism 8 is rotatably connected to the surface of the clamping mechanism 6.

[0019] A T-slot 41 is provided on the surface of the clutch mechanism 4, and the T-slot 41 is provided inside the CNC machine tool 1. A screw rod 42 is rotatably connected inside the T-slot 41, and a driving spline shaft 43 is rotatably connected inside the CNC machine tool 1. A sleeve rod 44 is slidably connected to the surface of the driving spline shaft 43, and one end of the sleeve rod 44 is fixedly connected to a first clutch disk 45, and one end of the screw rod 42 is fixedly connected to a second clutch disk 46, and a ring member 47 is rotatably connected to the surface of the sleeve rod 44.

[0020] The disconnecting mechanism 5 includes a support rod 51, which is fixedly connected to the surface of the CNC machine tool 1. The upper end of the support rod 51 is hinged with a ramp rod 52, and the lower end of the ramp rod 52 is fixedly connected with a triangular block 53. The upper end of the ring member 47 is fixedly connected with a ramp block 54, and the side of the ring member 47 is fixedly connected with a telescopic rod 55. The surface of the telescopic end of the telescopic rod 55 is provided with a telescopic spring 56, and the surface of the telescopic rod 55 is fixedly connected with an inclined rod 57. The front end of the telescopic rod 55 is ejected by the telescopic spring 56, and the ring member 47 is pushed to slide inside the T-slot 41, and the sleeve rod 44 at the lower end is driven to move at the same time. The sleeve rod 44 slides on the surface of the driving spline shaft 43, and drives the first clutch disk 45 to slide, and separates from the second clutch disk 46. At this time, the screw rod 42 will lose its power source, and the entire device will stop testing, which is regarded as a qualified test, thereby increasing the service life.

[0021] The clamping mechanism 6 includes a T-shaped support 61, which is threaded on the surface of the screw rod 42 and slidably connected inside the T-shaped slot 41. The upper end of the T-shaped support 61 is fixedly connected to a trapezoidal block 62, and the interior of the trapezoidal block 62 is fixedly connected to a CNC cylinder 63, and one end of the CNC cylinder 63 is fixedly connected to a T-shaped rod 65. The interior of the trapezoidal block 62 is rotatably connected to a fan gear 66, and a connecting rod 67 is rotatably connected between the fan gear 66 and the T-shaped rod 65. The interior of the trapezoidal block 62 is slidably connected to a clamping plate 68, and one end of the clamping plate 68 is fixedly connected to a tooth 69. The interior of the trapezoidal block 62 is fixedly connected to a limiting slide rail 64, and the clamping plate 68 is slidably connected on the surface of the limiting slide rail 64, and the tooth 69 is meshed with the fan gear 66.

[0022] The pulling mechanism 7 includes a grooved roller 71, which is rotatably connected inside the clamping plate 68. A rotating rod 72 is fixedly connected to the side of the main rotating shaft of the grooved roller 71, and an L-shaped rod 73 is fixedly connected to one end of the rotating rod 72. A pinion 74 is fixedly connected to the surface of the rotating rod 72. A bevel groove 75 is provided on the surface of the support plate 3. The grooved roller 71 rotates counterclockwise, so that horizontal pulling force can be applied to the steel in the clamping plate 68 during detection, thereby reducing the vertical pressure and preventing the clamping plate 68 from bringing excessive pressure to cause the surface of the steel plate to be depressed. The grooved roller 71 has a higher friction force and can relatively pull the steel again, thereby increasing the efficiency of detecting toughness on the original basis.

[0023] The stabilizing mechanism 8 includes an arc rod 81, which is rotatably connected to the surface of the trapezoidal block 62, and the trapezoidal block 62 is internally rotatably connected to a trigger plate 82, and the side of the main rotating shaft of the arc rod 81 is fixedly connected to a special-shaped clamping rod 83, and a spring 1 84 is connected between the special-shaped clamping rod 83 and the trapezoidal block 62, and the side of the trapezoidal block 62 is fixedly connected to a slide groove 85, and the inside of the slide groove 85 is slidably connected to a clamping block 86, and the surface of the clamping block 86 is provided with an inclined groove 87, and a spring 2 88 is arranged inside the slide groove 85, and the surface of the trapezoidal block 62 is fixedly connected to a limited slide groove 89, and the inside of the limited slide groove 89 is slidably connected to an L-shaped rod 2 810, and one end of the main rotating shaft of the trigger plate 82 is connected to the L-shaped A connecting rod 2 811 is rotatably connected between the rod 2 810. The plane of the special-shaped clamping rod 83 and the plane of the clamping block 86 are in contact with each other in the initial state, thereby blocking each other. When the L-shaped rod 2 810 slides, it will slide in the inclined groove 87 opened in the clamping block 86 and squeeze the inclined surface of the inclined groove 87, driving the clamping block 86 to slide. The clamping block 86 slides inside the slide groove 85 and separates from the special-shaped clamping rod 83. The special-shaped clamping rod 83 rotates through the spring 1 84, and at the same time drives the arc rod 81 to rotate clockwise, and the arc rod 81 on the clamping plate 68 at the lower end rotates counterclockwise to further clamp the broken steel to prevent the broken steel from flying around, thereby causing a safety hazard.

[0024] The use method and advantages of the present invention: When the nondestructive testing device for tensile strength of steel is used, the working process is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 As shown; When in use, first place the annular steel material on the surface of the placing table 2, and then the CNC machine tool 1 drives the CNC cylinder 63 to pull the T-bar 65, and the T-bar 65 pulls the two connecting rods 67. When the two connecting rods 67 are pulled, the two sector gears 66 are driven to rotate. When the sector gears 66 rotate, the two clamping plates 68 are driven by the teeth 69 to slide relative to each other in the limiting slide rail 64 and the trapezoidal block 62, clamping and fixing the two ends of the steel material. At this time, the steel material will be stuck in the position between the groove rollers 71, and the small gears 74 on both sides of the two trapezoidal blocks 62 will mesh with each other at this time, and then the annular member 47 is manually pushed. The annular member 47 slides inside the T-slot 41 and drives the sleeve rod 44 at the lower end to move at the same time. The sleeve rod 44 slides on the surface of the driving spline shaft 43 and drives the first clutch disk 45 to slide until it engages with the second clutch disk 46 at one end of the screw rod 42. At the same time, when the annular member 47 moves, it drives the inclined surface block 54 at the upper end to move at the same time, and squeezes the telescopic rod 55 and the telescopic spring 56 on the surface of the telescopic rod 55. The inclined surface block 54 moves to the back of the triangular block 53. At this time, the plane of the inclined surface block 54 fits with the plane of the triangular block 53 and is stuck to each other. At this time, the telescopic rod 55 is squeezed to an inextensible state.

[0025] After preparation, the CNC machine tool 1 is used to drive the driving spline shaft 43 to rotate. When the driving spline shaft 43 rotates, the first clutch plate 45 and the second clutch plate 46 drive the screw rod 42 to rotate. When the screw rod 42 rotates, it drives the T-shaped support 61 connected with the surface thread to move backward. When the T-shaped support 61 moves, it drives the trapezoidal block 62 at the upper end and the clamping plate 68 to move backward to pull the steel to test the toughness of the steel. When the clamping plate 68 moves, it drives the side L-shaped rod 73 to slide in the inclined groove 75 opened in the support plate 3. When the L-shaped rod 73 moves, it rotates clockwise along the inclined surface of the inclined groove 75. The L-shaped rod 73 passes through The rotating rod 72 rotates, and the rotating rod 72 rotates through the groove roller 71, driving the groove roller 71 to rotate, and at the same time, the small gear 74 is driven to rotate when the rotating rod 72 rotates. When the small gear 74 rotates, it also drives the small gear 74 meshing at the upper end to rotate, and at the same time drives the groove roller 71 at the upper end to rotate counterclockwise, so that horizontal pulling force can be applied to the steel in the clamping plate 68 during detection, thereby reducing the vertical pressure and preventing the clamping plate 68 from bringing excessive pressure to cause the surface of the steel plate to be depressed. The groove roller 71 has a higher friction and can relatively pull the steel again, which can increase the efficiency of toughness detection on the original basis.

[0026] After the clamping plate 68 moves a short distance, the inspection is considered completed to ensure that the non-destructive inspection of the steel is completed. When the T-shaped support 61 moves, it squeezes the telescopic rod 55. At this time, the telescopic rod 55 is in a non-retractable state. The T-shaped support 61 drives the telescopic rod 55 to move at the same time. When the telescopic rod 55 moves, it drives the inclined rod 57 to move. The height of the inclined rod 57 is higher than the inclined plane block 54. After moving, the inclined rod 57 squeezes one end of the inclined plane rod 52. When the inclined plane rod 52 is squeezed, it rotates with the support rod 51 as the center of the circle. At the same time, the triangle The block 53 and the inclined block 54 will be separated. At this time, the telescopic rod 55 will not encounter any resistance, and the front end of the telescopic rod 55 will be ejected through the telescopic spring 56, and at the same time, the annular member 47 will be pushed to slide inside the T-slot 41, and the sleeve rod 44 at the lower end will be driven to move at the same time. The sleeve rod 44 slides on the surface of the driving spline shaft 43, and drives the first clutch disk 45 to slide and separate from the second clutch disk 46. At this time, the screw rod 42 will lose its power source, and the entire device will stop testing, which is regarded as a qualified test, thereby increasing the service life.

[0027] When defective products appear during the detection process, the steel breaks. When the steel breaks, a large reaction force is generated, which causes the steel to vibrate greatly. When the steel vibrates, it hits the trigger plate 82, driving the trigger plate 82 to rotate. When the trigger plate 82 rotates, it drives the second connecting rod 811 to rotate. When the second connecting rod 811 rotates, the other end will pull the second L-shaped rod 810 to slide downward inside the limiting slide groove 89. At the same time, when the L-shaped rod 810 slides, it will slide in the inclined groove 87 opened in the block 86, and squeeze the inclined surface of the inclined groove 87, driving the block 86 to slide. The block 86 slides inside the slide groove 85 and separates from the special-shaped clamping rod 83. The special-shaped clamping rod 83 rotates through the spring 1 84, and at the same time drives the arc rod 81 to rotate clockwise. The arc rod 81 on the clamping plate 68 at the lower end rotates counterclockwise to further clamp the broken steel to prevent the broken steel from flying around, thereby causing a safety hazard.

[0028] Finally, it is only necessary to manually rotate the arc rod 81 , and the arc rod 81 drives the special-shaped clamping rod 83 to rotate, squeezing the clamping block 86 while clamping with the clamping block 86 .

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A non-destructive testing device for tensile strength of steel, comprising a numerically controlled machine tool (1), characterized in that: The surface of the CNC machine tool (1) is fixedly connected to a placing table (2), the surface of the CNC machine tool (1) is fixedly connected to a supporting plate (3), a clutch mechanism (4) is arranged inside the CNC machine tool (1), a disconnection mechanism (5) is installed on the surface of the CNC machine tool (1), a clamping mechanism (6) is slidably connected to the surface of the CNC machine tool (1), a tension mechanism (7) is arranged inside the clamping mechanism (6), and a stabilization mechanism (8) is rotatably connected to the surface of the clamping mechanism (6).

2. A nondestructive testing device for tensile strength of steel according to claim 1, characterized in that: The clutch mechanism (4) comprises a T-slot (41), wherein the T-slot (41) is provided inside the numerically controlled machine tool (1), a screw rod (42) is rotatably connected inside the T-slot (41), a driving spline shaft (43) is rotatably connected inside the numerically controlled machine tool (1), a sleeve rod (44) is slidably connected to the surface of the driving spline shaft (43), one end of the sleeve rod (44) is fixedly connected to a first clutch disc (45), one end of the screw rod (42) is fixedly connected to a second clutch disc (46), and a ring member (47) is rotatably connected to the surface of the sleeve rod (44).

3. A nondestructive testing device for tensile strength of steel according to claim 2, characterized in that: The disconnection mechanism (5) comprises a support rod (51), the support rod (51) being fixedly connected to the surface of the numerically controlled machine tool (1), the upper end of the support rod (51) being hingedly connected to an inclined rod (52), the lower end of the inclined rod (52) being fixedly connected to a triangular block (53), the upper end of the annular member (47) being fixedly connected to an inclined block (54), the side surface of the annular member (47) being fixedly connected to a telescopic rod (55), the surface of a telescopic end of the telescopic rod (55) being provided with a telescopic spring (56), and the surface of the telescopic rod (55) being fixedly connected to an inclined rod (57).

4. A nondestructive testing device for tensile strength of steel according to claim 3, characterized in that: The clamping mechanism (6) comprises a T-shaped support member (61), the T-shaped support member (61) being threadedly connected to the surface of the screw rod (42) and slidably connected inside the T-shaped groove (41); the upper end of the T-shaped support member (61) is fixedly connected to a trapezoidal block (62); the interior of the trapezoidal block (62) is fixedly connected to a numerical control cylinder (63); one end of the numerical control cylinder (63) is fixedly connected to a T-shaped rod (65); the interior of the trapezoidal block (62) is rotatably connected to a sector gear (66); a connecting rod 1 (67) is rotatably connected between the sector gear (66) and the T-shaped rod (65); the interior of the trapezoidal block (62) is slidably connected to a clamping plate (68); one end of the clamping plate (68) is fixedly connected to a tooth (69); and the interior of the trapezoidal block (62) is fixedly connected to a limited position slide rail (64).

5. A nondestructive testing device for tensile strength of steel according to claim 4, characterized in that: The tension mechanism (7) comprises a grooved roller (71), the grooved roller (71) being rotatably connected inside the clamping plate (68), a rotating rod (72) being fixedly connected to the side of the main rotating shaft of the grooved roller (71), an L-shaped rod (73) being fixedly connected to one end of the rotating rod (72), a small gear (74) being fixedly connected to the surface of the rotating rod (72), and a bevel groove (75) being provided on the surface of the support plate (3).

6. The nondestructive testing device for tensile strength of steel according to claim 4, characterized in that: The stabilizing mechanism (8) comprises an arc rod (81), the arc rod (81) being rotatably connected to the surface of the trapezoidal block (62), the trapezoidal block (62) being rotatably connected to a trigger plate (82), a side of the main rotating shaft of the arc rod (81) being fixedly connected to a special-shaped clamping rod (83), a spring 1 (84) being connected between the special-shaped clamping rod (83) and the trapezoidal block (62), a side of the trapezoidal block (62) being fixedly connected to a slide groove (85), a clamping block (86) being slidably connected inside the slide groove (85), an inclined groove (87) being provided on the surface of the clamping block (86), a spring 2 (88) being arranged inside the slide groove (85), a limited slide groove (89) being fixedly connected to the surface of the trapezoidal block (62), an L-shaped rod 2 (810) being slidably connected inside the limited slide groove (89), and a connecting rod 2 (811) being rotatably connected between one end of the main rotating shaft of the trigger plate (82) and the L-shaped rod 2 (810).

7. The nondestructive testing device for tensile strength of steel according to claim 4, characterized in that: The clamping plate (68) is slidably connected to the surface of the limiting slide rail (64), and the teeth (69) are meshed with the sector gear (66).

8. The nondestructive testing device for tensile strength of steel according to claim 6, characterized in that: The plane of the special-shaped clamping rod (83) and the plane of the clamping block (86) are in contact with each other in an initial state, thereby blocking each other.

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