A steel structure weld mechanical property detection device

Abstract

This invention relates to the field of steel structure testing technology and discloses a device for testing the mechanical properties of steel structure welds. The device includes a testing platform and a T-shaped workpiece. An electromagnetic adsorption platform is fixedly connected inside the testing platform, and the T-shaped workpiece is placed above the electromagnetic adsorption platform. A bending and impact mechanism is provided on the upper surface of the testing platform for bending and impact testing of the T-shaped workpiece. A clamping mechanism for holding and limiting the T-shaped workpiece is provided on the lower surface of the testing platform. During the return stroke after completing the bending test, the bending and impact mechanism automatically triggers the impact test through a purely mechanical structure, achieving purely mechanical sequential linkage between bending and impact testing. Both tests can be completed automatically without electrical control. After the T-shaped workpiece is clamped and positioned once, the device can continuously complete the testing of weld bending performance and impact resistance, effectively avoiding positioning deviations and reference drift caused by multiple clamping operations, and significantly improving the consistency and accuracy of the test data.

Description

Technical Field

[0001] This invention relates to the field of steel structure testing technology, and specifically provides a device for testing the mechanical properties of steel structure welds. Background Technology

[0002] This device is a mechanical testing instrument for steel structure welds, mainly used for performance testing of welds at the joints of vertical and horizontal plates in T-shaped steel structures. The equipment performs weld bending tests using a lateral pressing method and is equipped with an impact structure to test the weld's impact resistance. It is a commonly used specialized tooling in steel structure production and quality inspection. This type of equipment is mainly used to verify the connection strength and damage resistance of welds, and to determine whether the welding quality meets engineering standards. It is widely used in various T-shaped steel component factory sampling and incoming inspection scenarios.

[0003] Most existing conventional testing equipment performs bending and impact tests separately and in steps, requiring multiple disassembly and repositioning of the workpiece. This not only makes the testing process cumbersome and time-consuming, making it difficult to meet the needs of rapid quality inspection of batch components, but also leads to positioning deviations due to inconsistent clamping benchmarks, resulting in poor consistency of test data and low reliability of evaluation. Although some integrated testing devices attempt to integrate the two functions, they generally rely on electrical control systems, sensors, or reversing valves to achieve process switching. These devices are complex in structure, costly, lack field stability, are prone to failure, and cannot simulate continuous composite stress of bending followed by impact, resulting in test results that deviate significantly from actual engineering usage conditions. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mechanical property testing device for steel structure welds, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanical property testing device for steel structure welds, comprising a testing table and a T-shaped workpiece. An electromagnetic adsorption platform is fixedly connected inside the testing table, and the T-shaped workpiece is placed above the electromagnetic adsorption platform. A bending and impact mechanism for performing bending and impact testing on the T-shaped workpiece is provided on the upper surface of the testing table, and a clamping mechanism for clamping and limiting the T-shaped workpiece is provided on the lower surface of the testing table. During the return motion after completing the bending test, the bending and impact mechanism automatically triggers the impact test through a purely mechanical structure, realizing the purely mechanical timing linkage of bending and impact testing, and automatically completing the two tests without electrical control.

[0006] Preferably, the bending impact mechanism includes an L-shaped fixing frame and a top fixing frame fixedly connected to the upper surface of the testing platform. A push-pull rod is fixedly connected to the upper end of the top fixing frame. A sliding frame is fixedly connected to one end of the push-pull rod. A first telescopic rod is fixedly connected to one side of the sliding frame. A pressing testing plate is fixedly connected to one end of the first telescopic rod. A first spring is sleeved on the outer surface of the first telescopic rod. A clamping telescopic rod is fixedly connected to one side of the L-shaped fixing frame. A rear clamping plate is fixedly connected to one end of the clamping telescopic rod.

[0007] Preferably, a fixed track is fixedly connected inside the sliding frame, a conversion gear is rotatably connected inside the fixed track, an upper sliding toothed rod is slidably connected inside the fixed track, a second telescopic rod is fixedly connected to one side of the upper sliding toothed rod, a second spring is sleeved on the outer surface of the second telescopic rod, a sliding shell is slidably connected inside the sliding frame, a lower sliding toothed rod is fixedly connected to the upper end of the sliding shell, a third telescopic rod is slidably connected inside the sliding shell, a third spring is sleeved on the outer surface of the third telescopic rod, and an impact detection head is fixedly connected to one end of the third telescopic rod.

[0008] Preferably, a snap-fit ​​telescopic rod is fixedly connected to one side of the pressing detection plate, a snap-fit ​​spring is sleeved on the outer surface of the snap-fit ​​telescopic rod, a snap-fit ​​tongue is fixedly connected to one end of the snap-fit ​​telescopic rod, a fixed connecting block is fixedly connected to the upper end of the snap-fit ​​tongue, a first connecting rod is rotatably connected inside the fixed connecting block, a pressing telescopic rod is fixedly connected inside the pressing detection plate, a pressing spring is sleeved on the outer surface of the pressing telescopic rod, a push plate is fixedly connected to the top end of the pressing telescopic rod, a fixed block is fixedly connected to the upper end of the pressing detection plate, a half-pressing gear is rotatably connected inside the fixed block, a tie rod is fixedly connected to one side of the half-pressing gear, and a toothed block is fixedly connected to the lower surface of the top fixing frame.

[0009] Preferably, the clamping mechanism includes a motor fixedly connected to the lower surface of the testing platform, a threaded rod fixedly connected to the output shaft of the motor, a movable block threadedly connected to the outer surface of the threaded rod, two clamping plates fixedly connected to the upper end of the movable block, a viewing angle detection head fixedly connected to the upper surface of the two clamping plates, a lifting plate slidably connected inside the testing platform, and a protective cover fixedly connected to the upper surface of the lifting plate.

[0010] Preferably, an angled push block is fixedly connected to the lower surface of the lifting plate, a threaded telescopic rod is rotatably connected to the upper end of the lifting plate, a front clamping plate is fixedly connected to one end of the threaded telescopic rod, a first trapezoidal gear is fixedly connected to the other end of the threaded telescopic rod, a telescopic rotating rod is rotatably connected to the inside of the lifting plate, a second trapezoidal gear is fixedly connected to the top end of the telescopic rotating rod, a third trapezoidal gear is fixedly connected to the bottom end of the telescopic rotating rod, a connecting plate is fixedly connected to the lower surface of the moving block, and a push wheel is rotatably connected to the inside of the connecting plate.

[0011] Preferably, a first fixing frame is fixedly connected to the lower surface of the testing platform, a rotating connecting rod is rotatably connected inside the first fixing frame, a fourth trapezoidal gear is fixedly connected to one end of the rotating connecting rod, a sixth trapezoidal gear is fixedly connected to the other end of the rotating connecting rod, a fifth trapezoidal gear is fixedly connected to the outer surface of the threaded rod, and a limit support block is fixedly connected to the lower surface of the testing platform.

[0012] Preferably, the upper sliding gear is meshed with the conversion gear, the conversion gear is meshed with the lower sliding gear, the semi-pressing gear is meshed with the tooth block, the sliding frame and the pressing detection plate are connected by the first telescopic rod, and the first spring is disposed between the sliding frame and the pressing detection plate.

[0013] Preferably, the snap-fit ​​tongue is located at the front end of the impact detection head, the semi-pressing gear and the fixing block are connected by a tie rod, the push plate is slidably connected inside the pressing detection plate, the push plate and the fixing block are rotatably connected by a first connecting rod, and the apex angle at the contact point between the front end of the snap-fit ​​tongue and the rear end of the impact detection head is an arc surface.

[0014] Preferably, the fourth trapezoidal gear is meshed with the fifth trapezoidal gear, the third trapezoidal gear is meshed with the rotating connecting rod, the second trapezoidal gear is meshed with the first trapezoidal gear, the telescopic rotating rod is rotatably connected to the upper surface of the first fixed frame, the push wheel is located below the angled push block, and the limiting support block is located below the lifting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This invention integrates bending and impact testing into a single mechanism and employs a mechanical stroke-linked triggering structure. After a single clamping and positioning of the T-shaped plate, it can continuously complete the testing of weld bending and impact resistance properties, effectively avoiding positioning deviations and reference drift caused by multiple clamping operations, and significantly improving the consistency and accuracy of the test data. The device automatically triggers the impact action through a pressing return motion, eliminating the need for additional electrical control and reversing mechanisms. The overall structure is simple, the operation is stable and reliable, greatly simplifying the testing process, shortening the testing cycle, and improving the overall efficiency of mechanical property testing of steel structure welds. It is more suitable for the rapid quality inspection needs of batch engineering components.

[0017] 2. This invention utilizes a lateral pressing force application method at the weld seam connecting the vertical and horizontal plates of the T-shaped plate. This method can highly replicate the actual service stress state of the component, making the test results more consistent with real-world operating conditions and enhancing the scientific rigor and reference value of quality inspection. The device is equipped with a multi-level elastic buffer and guiding limit structure, which ensures stable force application and powerful instantaneous impact while avoiding rigid damage to the workpiece and weld seam. At the same time, the integrated layout minimizes the equipment's footprint, simplifies debugging and maintenance, and reduces operating costs. It can comprehensively and stably complete the integrated testing of weld seam strength and toughness, meeting the high-quality testing standards of the steel structure industry. Attached Figure Description

[0018] Figure 1 This is a front view of a steel structure weld mechanical property testing device proposed in this invention;

[0019] Figure 2 This is a side sectional view of a steel structure weld mechanical property testing device proposed in this invention;

[0020] Figure 3 For the present invention Figure 2 Enlarged view of point A;

[0021] Figure 4 For the present invention Figure 2 Enlarged view of point B;

[0022] Figure 5 This is a cross-sectional view of the bending impact mechanism of a steel structure weld mechanical property testing device proposed in this invention;

[0023] Figure 6 For the present invention Figure 5 Enlarged view of point C;

[0024] Figure 7 This is a cross-sectional view of the clamping mechanism of a steel structure weld mechanical property testing device proposed in this invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged view of point D.

[0026] Legend:

[0027] 1. Testing table; 100. Electromagnetic adsorption platform; 2. Bending impact mechanism; 201. L-shaped fixing frame; 202. Top fixing frame; 203. Push-pull rod; 204. Sliding frame; 205. First telescopic rod; 206. First spring; 207. Pressing detection plate; 208. Fixed track; 209. Conversion gear; 210. Upper sliding gear; 211. Second telescopic rod; 212. Second spring; 213. Sliding shell; 214. Lower sliding gear; 215. Third telescopic rod; 216. Third spring; 217. Impact detection head; 218. Snap-fit ​​telescopic rod; 219. Snap-fit ​​spring; 220. Snap-fit ​​tongue; 221. Fixed connecting block; 222. First connecting rod; 223. Pressing telescopic rod; 224. Pressing spring; 225. Push plate; 226. Fixed block; 2 27. Semi-pressing gear; 228. Tie rod; 229. Gear block; 230. Clamping telescopic rod; 231. Rear end clamping plate; 3. Clamping mechanism; 301. Motor; 302. Threaded rod; 303. Moving block; 304. Side clamping plates; 305. View detection head; 306. Lifting plate; 307. Protective cover; 308. Angled push block; 309. Threaded telescopic rod; 310. Front end clamping plate; 311. First trapezoidal gear; 312. Telescopic rotating rod; 313. Second trapezoidal gear; 314. Third trapezoidal gear; 315. First fixed frame; 316. Rotating connecting rod; 317. Fourth trapezoidal gear; 318. Fifth trapezoidal gear; 319. Connecting plate; 320. Push wheel; 321. Sixth trapezoidal gear; 322. Limiting support block; 4. T-shaped plate workpiece. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0030] like Figure 1 - Figure 8The device for testing the mechanical properties of welded steel structures includes a testing platform 1 and a T-shaped workpiece 4. An electromagnetic adsorption platform 100 is fixedly connected inside the testing platform 1. The T-shaped workpiece 4 is placed above the electromagnetic adsorption platform 100. A bending and impact mechanism 2 is provided on the upper surface of the testing platform 1 for bending and impact testing of the T-shaped workpiece 4. A clamping mechanism 3 is provided on the lower surface of the testing platform 1 for clamping and limiting the T-shaped workpiece 4. During the return motion after completing the bending test, the bending and impact mechanism 2 automatically triggers the impact test through a purely mechanical structure, realizing the pure mechanical timing linkage of bending and impact testing. The two tests can be completed automatically without electrical control.

[0031] The bending impact mechanism 2 includes an L-shaped fixing frame 201 and a top fixing frame 202 fixedly connected to the upper surface of the testing table 1. A push-pull rod 203 is fixedly connected to the upper end of the top fixing frame 202. A sliding frame 204 is fixedly connected to one end of the push-pull rod 203. A first telescopic rod 205 is fixedly connected to one side of the sliding frame 204. A pressing detection plate 207 is fixedly connected to one end of the first telescopic rod 205. A first spring 206 is sleeved on the outer surface of the first telescopic rod 205. A clamping telescopic rod 230 is fixedly connected to one side of the L-shaped fixing frame 201. A rear clamping plate 231 is fixedly connected to one end of the clamping telescopic rod 230. The interior of the sliding frame 204... A fixed track 208 is fixedly connected, and a conversion gear 209 is rotatably connected inside the fixed track 208. An upper sliding gear 210 is slidably connected inside the fixed track 208. A second telescopic rod 211 is fixedly connected to one side of the upper sliding gear 210. A second spring 212 is sleeved on the outer surface of the second telescopic rod 211. A sliding shell 213 is slidably connected inside the sliding frame 204. A lower sliding gear 214 is fixedly connected to the upper end of the sliding shell 213. A third telescopic rod 215 is slidably connected inside the sliding shell 213. A third spring 216 is sleeved on the outer surface of the third telescopic rod 215. A punch is fixedly connected to one end of the third telescopic rod 215. The detection head 217 is pressed, and a snap-fit ​​telescopic rod 218 is fixedly connected to one side of the detection plate 207. A snap-fit ​​spring 219 is sleeved on the outer surface of the snap-fit ​​telescopic rod 218. A snap-fit ​​tongue 220 is fixedly connected to one end of the snap-fit ​​telescopic rod 218. A fixed connecting block 221 is fixedly connected to the upper end of the snap-fit ​​tongue 220. A first connecting rod 222 is rotatably connected inside the fixed connecting block 221. A pressing telescopic rod 223 is fixedly connected inside the detection plate 207. A pressing spring 224 is sleeved on the outer surface of the pressing telescopic rod 223. A push plate 225 is fixedly connected to the top end of the pressing telescopic rod 223. A push plate 225 is fixedly connected to the upper end of the detection plate 207. A fixed block 226 has a semi-pressing gear 227 rotatably connected inside it. A tie rod 228 is fixedly connected to one side of the semi-pressing gear 227. A toothed block 229 is fixedly connected to the lower surface of the top fixed frame 202. An upper sliding toothed rod 210 meshes with a conversion gear 209, and the conversion gear 209 meshes with a lower sliding toothed rod 214. The semi-pressing gear 227 meshes with the toothed block 229. A sliding frame 204 and a pressing detection plate 207 are connected by a first telescopic rod 205, and a first spring 206 is disposed between the sliding frame 204 and the pressing detection plate 207. A snap-fit ​​tongue 220 is disposed at the front end of the impact detection head 217. The semi-pressing gear 227 and the fixing block 226 are connected by the tie rod 228. The push plate 225 is slidably connected inside the pressing detection plate 207. The push plate 225 and the fixing connecting block 221 are rotatably connected by the first connecting rod 222. The apex of the contact point between the front end of the snap tongue 220 and the rear end of the impact detection head 217 is an arc surface.

[0032] Furthermore, the push-pull rod 203 drives the sliding frame 204 and the pressing detection plate 207 to move laterally, applying lateral pressure to the vertical plate of the shaped workpiece 4 to complete the weld bending detection. Simultaneously, the upper sliding toothed rod 210 is blocked by the front stop, causing the second telescopic rod 211 and the second spring 212 to retract. The second telescopic rod 211 retracts and applies pressure, while the upper sliding toothed rod 210 slides inside the fixed track 208. The conversion gear 209 pushes the lower sliding toothed rod 214 and the sliding shell 213 inward, compressing the third telescopic rod 215 and the third spring 216, which then stores energy. After bending to the correct position, the push-pull rod 203 returns to its original position, and the pressing detection plate 207... Synchronous movement: When the pressing detection plate 207 moves forward, the half-pressing gear 227 is pushed clockwise by the tooth block 229. The half-pressing gear 227 will not push the push plate 225 downward. When the pressing detection plate 207 retracts and moves backward, the half-pressing gear 227 rotates counterclockwise, thereby pushing the push plate 225 downward. Then, through the first connecting rod 222, it pushes the fixed connecting block 221 and the snap-fit ​​tongue 220 to move to both sides, thereby releasing the limiting constraint of the impact detection head 217. The third spring 216 releases elastic potential energy, driving the impact detection head 217 to quickly extend and impact the vertical plate, realizing the mechanical linkage timing control of bending detection and impact detection. The two detections can be completed automatically without additional electrical control.

[0033] The clamping mechanism 3 includes a motor 301 fixedly connected to the lower surface of the inspection table 1. A threaded rod 302 is fixedly connected to the output shaft of the motor 301. A moving block 303 is threadedly connected to the outer surface of the threaded rod 302. Two clamping plates 304 are fixedly connected to the upper end of the moving block 303. An angle detection head 305 is fixedly connected to the upper surface of the two clamping plates 304. A lifting plate 306 is slidably connected inside the inspection table 1. A protective cover 307 is fixedly connected to the upper surface of the lifting plate 306. An angled push block 308 is fixedly connected to the lower surface of the lifting plate 306. A threaded telescopic rod 309 is rotatably connected to the upper end of the lifting plate 306. A front clamping plate 310 is fixedly connected to one end of the threaded telescopic rod 309, and a first trapezoidal gear 311 is fixedly connected to the other end of the threaded telescopic rod 309. A telescopic rotating rod 312 is rotatably connected to the inside of the lifting plate 306. A second trapezoidal gear 313 is fixedly connected to the top end of the telescopic rotating rod 312, and a third trapezoidal gear 314 is fixedly connected to the bottom end of the telescopic rotating rod 312. A connecting plate 319 is fixedly connected to the lower surface of the moving block 303. A push wheel 320 is rotatably connected to the inside of the connecting plate 319. A first fixing frame 315 is fixedly connected to the lower surface of the detection table 1. A rotating connecting rod 316 is rotatably connected to the inside of the first fixing frame 315. A fourth trapezoidal gear 317 is fixedly connected to one end of the rotating connecting rod 316, and a sixth trapezoidal gear 321 is fixedly connected to the other end of the rotating connecting rod 316. A fifth trapezoidal gear 321 is fixedly connected to the outer surface of the threaded rod 302. Gear 318, a limiting support block 322 is fixedly connected to the lower surface of the detection table 1, a fourth trapezoidal gear 317 is meshed with a fifth trapezoidal gear 318, a third trapezoidal gear 314 is meshed with a rotating connecting rod 316, a second trapezoidal gear 313 is meshed with a first trapezoidal gear 311, a telescopic rotating rod 312 is rotatably connected to the upper surface of the first fixed frame 315, a push wheel 320 is located below the angled push block 308, and a limiting support block 322 is located below the lifting plate 306.

[0034] Furthermore, the clamping mechanism 3 is driven by the motor 301 to rotate the threaded rod 302, which drives the moving block 303 and the clamping plates 304 on both sides to move towards each other, thereby achieving the lateral clamping and positioning of the T-shaped workpiece 4. Before clamping on both sides, the threaded rod 302 drives the telescopic rotating rod 312 and the threaded telescopic rod 309 to move through the multi-stage trapezoidal gear transmission, pushing the front clamping plate 310 to push it upward from inside the inspection table 1 and then longitudinally press and position it. When the moving block 303 moves, it drives the connecting plate 319 to move. At the same time, the push wheel 320 pushes the angled push block 308 and the lifting plate 306 upward, which, together with the lifting plate 306 and the protective cover 307, form a multi-directional limit. Then, the clamping telescopic rod 230 pushes the rear clamping plate 231 to position the rear end of the T-shaped workpiece 4, so that the T-shaped workpiece 4 maintains a fixed posture throughout the inspection process and does not shift, shake, or flip.

[0035] Working principle: First, the T-shaped workpiece 4 is placed above the electromagnetic adsorption platform 100, and then fixed by the clamping mechanism 3. The motor 301 drives the threaded rod 302 to rotate, which drives the moving block 303 and the two side clamping plates 304 to move towards each other, realizing the lateral clamping and positioning of the T-shaped workpiece 4. Before clamping on both sides, the threaded rod 302 drives the telescopic rotating rod 312 and the threaded telescopic rod 309 to move through the multi-stage trapezoidal gear transmission, pushing the front clamping plate 310 to push it upward from inside the inspection table 1 and then longitudinally press and position it. As block 303 moves, it drives connecting plate 319 to move. Simultaneously, push wheel 320 pushes block 308 and lifting plate 306 upward at an angle. Lifting plate 306 and protective cover 307 form multi-directional limiting. Then, clamping telescopic rod 230 pushes rear clamping plate 231 to position the rear end of T-shaped workpiece 4, ensuring the T-shaped workpiece 4 maintains a fixed posture throughout the inspection process, preventing displacement, shaking, or flipping. After clamping, push-pull rod 203 drives sliding frame 204 and pressing detection plate 207 to move laterally, applying lateral pressure to the vertical plate of T-shaped workpiece 4. Upon completion of the weld bend inspection, while pressure is applied, the upper sliding rack 210 is blocked by the front stop, causing the second telescopic rod 211 and the second spring 212 to retract. The second telescopic rod 211 retracts and applies pressure, while the upper sliding rack 210 slides inside the fixed track 208. Through the conversion gear 209, it pushes the lower sliding rack 214 and the sliding shell 213 to move inward, thereby compressing the third telescopic rod 215 and the third spring 216, and the third spring 216 stores force. After the bend is in place, the push-pull rod 203 returns to its original position, and the pressing detection plate 207 moves synchronously. When the pressing detection plate 207 moves forward, it partially presses the gear 227. The toothed block 229 will push the push plate 225 to rotate clockwise. The half-pressing gear 227 will not push the push plate 225 downward. When the pressing detection plate 207 retracts and moves backward, the half-pressing gear 227 will rotate counterclockwise, thereby pushing the push plate 225 to move downward. Then, through the first connecting rod 222, the fixed connecting block 221 and the snap-fit ​​tongue 220 will be pushed to move to both sides, thereby releasing the limiting constraint of the impact detection head 217. The third spring 216 releases elastic potential energy, driving the impact detection head 217 to quickly extend and impact the vertical plate, realizing the mechanical linkage timing control of bending detection and impact detection. The two detections can be completed automatically without additional electrical control.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A device for testing the mechanical properties of welded seams in steel structures, comprising a testing table (1) and a T-shaped workpiece (4), characterized in that: An electromagnetic adsorption platform (100) is fixedly connected inside the testing platform (1). The T-shaped workpiece (4) is placed above the electromagnetic adsorption platform (100). A bending impact mechanism (2) for bending and impact testing of the T-shaped workpiece (4) is provided on the upper surface of the testing platform (1). A clamping mechanism (3) for clamping and limiting the T-shaped workpiece (4) is provided on the lower surface of the testing platform (1). During the return motion after completing the bending test, the bending impact mechanism (2) automatically triggers the impact test through a purely mechanical structure, realizing the pure mechanical timing linkage of bending test and impact test. The two tests can be completed automatically without electrical control.

2. The device for testing the mechanical properties of steel structure welds according to claim 1, characterized in that: The bending impact mechanism (2) includes an L-shaped fixing frame (201) and a top fixing frame (202) fixedly connected to the upper surface of the testing table (1). A push-pull rod (203) is fixedly connected to the upper end of the top fixing frame (202). A sliding frame (204) is fixedly connected to one end of the push-pull rod (203). A first telescopic rod (205) is fixedly connected to one side of the sliding frame (204). A pressing detection plate (207) is fixedly connected to one end of the first telescopic rod (205). A first spring (206) is sleeved on the outer surface of the first telescopic rod (205). A clamping telescopic rod (230) is fixedly connected to one side of the L-shaped fixing frame (201). A rear clamping plate (231) is fixedly connected to one end of the clamping telescopic rod (230).

3. The device for testing the mechanical properties of steel structure welds according to claim 2, characterized in that: The sliding frame (204) is internally fixedly connected to a fixed track (208), and the fixed track (208) is internally rotatably connected to a conversion gear (209). The fixed track (208) is internally slidably connected to an upper sliding rack (210), and a second telescopic rod (211) is fixedly connected to one side of the upper sliding rack (210). A second spring (212) is sleeved on the outer surface of the second telescopic rod (211). The sliding frame (204) is internally slidably connected to a sliding shell (213), and a lower sliding rack (214) is fixedly connected to the upper end of the sliding shell (213). The sliding shell (213) is internally slidably connected to a third telescopic rod (215), and a third spring (216) is sleeved on the outer surface of the third telescopic rod (215). An impact detection head (217) is fixedly connected to one end of the third telescopic rod (215).

4. The device for testing the mechanical properties of steel structure welds according to claim 3, characterized in that: A snap-fit ​​telescopic rod (218) is fixedly connected to one side of the pressing detection plate (207). A snap-fit ​​spring (219) is sleeved on the outer surface of the snap-fit ​​telescopic rod (218). A snap-fit ​​tongue (220) is fixedly connected to one end of the snap-fit ​​telescopic rod (218). A fixed connecting block (221) is fixedly connected to the upper end of the snap-fit ​​tongue (220). A first connecting rod (222) is rotatably connected inside the fixed connecting block (221). A pressing telescopic rod (222) is fixedly connected inside the pressing detection plate (207). 23), a pressing spring (224) is sleeved on the outer surface of the pressing telescopic rod (223), a push plate (225) is fixedly connected to the top of the pressing telescopic rod (223), a fixing block (226) is fixedly connected to the upper end of the pressing detection plate (207), a half pressing gear (227) is rotatably connected inside the fixing block (226), a tie rod (228) is fixedly connected to one side of the half pressing gear (227), and a toothed block (229) is fixedly connected to the lower surface of the top fixing frame (202).

5. The device for testing the mechanical properties of steel structure welds according to claim 1, characterized in that: The clamping mechanism (3) includes a motor (301) fixedly connected to the lower surface of the detection table (1). A threaded rod (302) is fixedly connected to the output shaft of the motor (301). A moving block (303) is threadedly connected to the outer surface of the threaded rod (302). Two clamping plates (304) are fixedly connected to the upper end of the moving block (303). An angle detection head (305) is fixedly connected to the upper surface of the two clamping plates (304). A lifting plate (306) is slidably connected inside the detection table (1). A protective cover (307) is fixedly connected to the upper surface of the lifting plate (306).

6. The device for testing the mechanical properties of steel structure welds according to claim 5, characterized in that: An angled push block (308) is fixedly connected to the lower surface of the lifting plate (306). A threaded telescopic rod (309) is rotatably connected to the upper end of the lifting plate (306). A front clamping plate (310) is fixedly connected to one end of the threaded telescopic rod (309). A first trapezoidal gear (311) is fixedly connected to the other end of the threaded telescopic rod (309). A telescopic rotating rod (312) is rotatably connected to the inside of the lifting plate (306). A second trapezoidal gear (313) is fixedly connected to the top end of the telescopic rotating rod (312). A third trapezoidal gear (314) is fixedly connected to the bottom end of the telescopic rotating rod (312). A connecting plate (319) is fixedly connected to the lower surface of the moving block (303). A push wheel (320) is rotatably connected to the inside of the connecting plate (319).

7. The device for testing the mechanical properties of steel structure welds according to claim 6, characterized in that: The lower surface of the testing platform (1) is fixedly connected to a first fixed frame (315), and a rotating connecting rod (316) is rotatably connected inside the first fixed frame (315). One end of the rotating connecting rod (316) is fixedly connected to a fourth trapezoidal gear (317), and the other end of the rotating connecting rod (316) is fixedly connected to a sixth trapezoidal gear (321). The outer surface of the threaded rod (302) is fixedly connected to a fifth trapezoidal gear (318), and a limit support block (322) is fixedly connected to the lower surface of the testing platform (1).

8. The device for testing the mechanical properties of steel structure welds according to claim 4, characterized in that: The upper sliding rack (210) meshes with the conversion gear (209), the conversion gear (209) meshes with the lower sliding rack (214), the semi-pressing gear (227) meshes with the tooth block (229), the sliding frame (204) and the pressing detection plate (207) are connected by the first telescopic rod (205), and the first spring (206) is disposed between the sliding frame (204) and the pressing detection plate (207).

9. The device for testing the mechanical properties of steel structure welds according to claim 8, characterized in that: The snap-fit ​​tongue (220) is located at the front end of the impact detection head (217). The semi-pressing gear (227) and the fixing block (226) are connected by a tie rod (228). The push plate (225) is slidably connected inside the pressing detection plate (207). The push plate (225) and the fixing connecting block (221) are rotatably connected by a first connecting rod (222). The apex of the front end of the snap-fit ​​tongue (220) and the rear end of the impact detection head (217) are both arc surfaces.

10. A device for testing the mechanical properties of steel structure welds according to claim 7, characterized in that: The fourth trapezoidal gear (317) is meshed with the fifth trapezoidal gear (318), the third trapezoidal gear (314) is meshed with the rotating connecting rod (316), the second trapezoidal gear (313) is meshed with the first trapezoidal gear (311), the telescopic rotating rod (312) is rotatably connected to the upper surface of the first fixed frame (315), the push wheel (320) is located below the angled push block (308), and the limiting support block (322) is located below the lifting plate (306).

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