Stretching mechanism for weathering steel weld joint test

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The rotating plate and rotating bar structure driven by hydraulic rods, combined with the heater and nozzle design, solves the problem of the single clamping structure of traditional weathering steel weld testing equipment, realizes adaptive clamping and multi-scenario performance testing of weld samples of different sizes, and improves the flexibility and accuracy of the test.

CN223361945UActive Publication Date: 2025-09-19HEBEI JITUO HEAVY IND CO LTD

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Patent Information

Application Number: CN202422562529.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-10-23
Publication Date: 2025-09-19
Estimated Expiration: 2034-10-23

AI Technical Summary

Technical Problem

The clamping structure of the traditional tensile mechanism used for weathering steel weld testing is relatively simple and cannot adapt to weld samples of different sizes, resulting in increased equipment limitations.

Method used

The hydraulic rod-driven rotating plate and rotating bar structure, combined with an adjustable clamping plate design, can achieve stable clamping of welds of different sizes. The heater simulates high temperature environment, and the liquid tank and nozzle spray solution simulates corrosive environment, expanding the testing function.

Benefits of technology

The versatility and functionality of the equipment have been improved, making it adaptable to testing weld samples of different sizes, and capable of simulating high temperature and corrosive environments, providing a more comprehensive performance evaluation.

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Abstract

The utility model relates to the technical field of weathering resistant steel testing, and discloses a tensile mechanism for weathering resistant steel welding seam testing, which comprises a base, the upper surface of the base is fixedly connected with a side plate, the upper surface of the base is fixedly connected with a mounting plate, the interior of the mounting plate is fixedly connected with a hydraulic rod, and the output end of the hydraulic rod is fixedly connected with a connecting block. The upper surface of the mounting plate is fixedly connected with a fixing block, the side wall of the fixing block is rotatably connected with a first rotating strip, one end of the first rotating strip is rotatably connected with a clamping plate, the side wall of the fixing block is rotatably connected with a second rotating strip, one end of the second rotating strip is rotatably connected to the side wall of the clamping plate, and the interior of the connecting block is rotatably connected with a rotating plate. According to the device, the hydraulic rod is started to contract, the connecting block is driven to move to enable the rotating plate to rotate, so that the first rotating strip is pulled to rotate, meanwhile, the second rotating strip is made to rotate, the effect that the clamping plate can clamp steel welding seam test pieces of different sizes is achieved, and the universality of the device is improved through the structure.

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Description

Technical Field

[0001] The utility model relates to the technical field of weathering steel testing, in particular to a stretching mechanism for testing weathering steel welds. Background Art

[0002] Weathering steel, also known as atmospheric corrosion-resistant steel plate, is a low-alloy, high-strength structural steel plate. It improves the steel's atmospheric corrosion resistance by adding small amounts of copper, phosphorus, chromium, nickel, and other elements to form a protective layer on the metal surface. Weathering steel can also refine its grains by adding elements such as molybdenum, niobium, vanadium, titanium, and zirconium to improve the steel's mechanical properties, enhance its strength and toughness, and lower its brittle transition temperature, resulting in better resistance to brittle fracture. The tensile test of weathering steel welds is an important experimental method for evaluating the performance of welded joints. This test typically involves applying a tensile force to the weld area until fracture occurs to determine the weld's mechanical properties.

[0003] Traditional tensile testing systems for weathering steel welds consist of a fixture, loading system, and frame. The loading system applies tensile force to the weld specimen, while a measurement system monitors the force and displacement changes during the tensile process in real time. The control system automatically controls the tensile speed and force increase according to a pre-set test program until the specimen breaks.

[0004] The clamping structure of the traditional tensile mechanism for testing weathering steel welds is relatively simple and cannot adapt to weld samples of different sizes, which increases the limitations of the equipment. Therefore, a tensile mechanism for testing weathering steel welds is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a stretching mechanism for testing weathering steel welds, aiming to improve the problem in the existing technology that the clamping structure is relatively single and cannot adapt to weld samples of different sizes, thereby increasing the limitations of the equipment.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A tensile mechanism for testing weathering steel welds, comprising a base, an upper surface of the base being fixedly connected to a side plate, an upper surface of the base being fixedly connected to a mounting plate, an interior of the mounting plate being fixedly connected to a hydraulic rod, an output end of the hydraulic rod being fixedly connected to a connecting block, an upper surface of the mounting plate being fixedly connected to a fixed block, a side wall of the fixed block being rotatably connected to a first rotating bar, one end of the first rotating bar being rotatably connected to a clamping plate, a side wall of the fixed block being rotatably connected to a second rotating bar, one end of the second rotating bar being rotatably connected to the side wall of the clamping plate, an interior of the connecting block being rotatably connected to a rotating plate, one end of the rotating plate being rotatably connected to the interior of the first rotating bar, a tensile assembly being arranged inside the side plate for tensile testing steel welds;

[0008] As a further description of the above technical solution:

[0009] The side panels are fixedly connected to the side walls with rectangular shells, and the side walls of the rectangular shells are provided with door panels;

[0010] As a further description of the above technical solution:

[0011] The stretching assembly includes a motor, the side wall of the motor is fixedly connected to the upper surface of the side plate, the output end of the motor is fixedly connected to a screw rod, and the side wall of the screw rod is slidably connected to a slider;

[0012] As a further description of the above technical solution:

[0013] The side wall of the screw rod is rotatably connected to the inside of the side plate, and the side wall of the slider is fixedly connected to the side wall of the upper mounting plate;

[0014] As a further description of the above technical solution:

[0015] The side wall of the rectangular shell is fixedly connected to a heater, the side wall of the heater is fixedly connected to a heating rod, and one end of the heating rod is fixedly connected to the inside of the rectangular shell;

[0016] As a further description of the above technical solution:

[0017] The side wall of the rectangular shell is fixedly connected to a liquid storage tank, and a piston is provided on the upper surface of the liquid storage tank;

[0018] As a further description of the above technical solution:

[0019] The side wall of the liquid storage tank is fixedly connected to a delivery pipe 1, one end of the delivery pipe 1 is fixedly connected to a nozzle 1, and a side wall of the nozzle is fixedly connected to the inside of the rectangular shell;

[0020] As a further description of the above technical solution:

[0021] A second delivery pipe is fixedly connected to the upper surface of the liquid storage tank, one end of the second delivery pipe is fixedly connected to a second nozzle, and a side wall of the second nozzle is fixedly connected to the inside of the rectangular shell.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, by starting the hydraulic rod to contract it, the connecting block is driven to move and the rotating plate is rotated, thereby pulling the rotating bar 1 to rotate, and at the same time rotating the rotating bar 2 to rotate, so that the clamping plate can clamp steel weld test pieces of different sizes. This solves the problem that the clamping structure of the tensile mechanism used for some weathering steel weld tests is relatively simple and cannot adapt to weld samples of different sizes, thereby increasing the limitations of the equipment. The above structure improves the versatility of the equipment.

[0024] 2. In the present invention, the heater is activated to heat the heating rod to simulate the performance of the weld sample at high temperature. An alkaline solution is added to the liquid storage tank to evaluate the weld's tolerance in a corrosive environment, or water is added to simulate the effect of a humid environment on the weld. The above structure increases the functionality of the equipment and improves the test effect on the weld sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional schematic diagram of a tensile mechanism for testing weathering steel welds proposed in the present invention;

[0026] Figure 2 This is a schematic structural diagram of a mounting plate of a tensile mechanism for testing weathering steel welds proposed in the present invention;

[0027] Figure 3 This is a schematic structural diagram of a rectangular shell of a tensile mechanism for testing weathering steel welds proposed in the present invention.

[0028] Legend:

[0029] 1. Base; 2. Side panels; 3. Mounting plate; 4. Hydraulic rod; 5. Connecting block; 6. Fixed block; 7. Rotating bar 1; 8. Rotating bar 2; 9. Clamp; 10. Rotating plate; 11. Motor; 12. Screw; 13. Slider; 14. Rectangular housing; 15. Door panel; 16. Heater; 17. Heating rod; 18. Liquid storage tank; 19. Piston; 20. Delivery pipe 1; 21. Nozzle 1; 22. Delivery pipe 2; 23. Nozzle 2. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1 and Figure 2, the utility model provides an embodiment: a tensile mechanism for testing weathering steel welds, including a base 1, the upper surface of the base 1 is fixedly connected to a side plate 2, the upper surface of the base 1 is fixedly connected to a mounting plate 3, the interior of the mounting plate 3 is fixedly connected to a hydraulic rod 4, the output end of the hydraulic rod 4 is fixedly connected to a connecting block 5, the connecting block 5 is used to pull the rotating plate 10 to rotate, the upper surface of the mounting plate 3 is fixedly connected to a fixed block 6, the side wall of the fixed block 6 is rotatably connected to a rotating bar 7, one end of the rotating bar 7 is rotatably connected to a splint 9, the side wall of the fixed block 6 is rotatably connected to a rotating bar 7 Bar 2 8, one end of the rotating bar 2 8 is rotatably connected to the side wall of the splint 9, the connecting block 5 is rotatably connected to the rotating plate 10, one end of the rotating plate 10 is rotatably connected to the inside of the rotating bar 1 7, a tensile assembly is provided inside the side plate 2 for tensile testing the steel weld, the tensile assembly includes a motor 11, the side wall of the motor 11 is fixedly connected to the upper surface of the side plate 2, the output end of the motor 11 is fixedly connected to a screw rod 12, the side wall of the screw rod 12 is slidably connected to a slider 13, the side wall of the screw rod 12 is rotatably connected to the inside of the side plate 2, and the side wall of the slider 13 is fixedly connected to the side wall of the upper mounting plate 3;

[0032] When using this equipment for testing, the operator needs to first position the weld sample between the clamping plates 9 to ensure that the side walls of the weld sample fit together with the rectangular shell 14. Then, the operator will start the hydraulic rod 4 to start contracting, driving the connecting block 5 connected to it to move. The movement of the connecting block 5 prompts the rotating plate 10 to start rotating according to the preset trajectory. As the rotating plate 10 rotates, the rotating bar 1 7 connected to it rotates accordingly, and finally enables the clamping plate 9 to move according to the predetermined path, exerting a controlled force on the weld sample. While the rotating plate 10 rotates, the rotating bar 2 8 starts to rotate until the rotation of the rotating bar 2 8 reaches the predetermined position. The clamping plate 9 also moves to the target position, tightly fitting the weld sample to achieve a firm clamping of it. This fixture improves the flexibility and versatility of the test. The design of this fixture allows it to be quickly adjusted to fix weld samples of different sizes. There is no need to replace a special fixture for each size of sample, thereby expanding the application range of the test.

[0033] Reference Figure 1 and Figure 3The side panel 2 is fixedly connected to a rectangular shell 14, and a door panel 15 is provided on the side wall of the rectangular shell 14. A heater 16 is fixedly connected to the side wall of the rectangular shell 14, and a heating rod 17 is fixedly connected to the side wall of the heater 16. The heating rod 17 is used to heat the inside of the rectangular shell 14, and one end of the heating rod 17 is fixedly connected to the inside of the rectangular shell 14. A liquid storage tank 18 is fixedly connected to the side wall of the rectangular shell 14. The liquid storage tank 18 is used to store different liquids. A piston 19 is provided on the upper surface of the liquid storage tank 18. A delivery pipe 20 is fixedly connected to the side wall of the liquid storage tank 18. One end of the delivery pipe 20 is fixedly connected to a nozzle 1. The side wall of the nozzle 121 is fixedly connected to the inside of the rectangular shell 14. A delivery pipe 22 is fixedly connected to the upper surface of the liquid storage tank 18. One end of the delivery pipe 22 is fixedly connected to a nozzle 2. The side wall of the nozzle 2 23 is fixedly connected to the inside of the rectangular shell 14. Different test agents can be sprayed on the sample surface through the nozzle 1 21 and the nozzle 2 23.

[0034] After the weld sample is fixed, the door panel 15 is then closed, and the heater 16 is activated. The heating rod 17 then starts working, evenly dissipating heat and gradually raising the temperature inside the rectangular housing 14 until the preset high-temperature test condition is reached. When the temperature inside the housing stabilizes, the motor 11 is started. The operation of the motor 11 drives the screw 12 to rotate, thereby causing the slider 13 to move smoothly on the track. The movement of the slider 13 causes the upper clamping plate 9 to gradually apply tension to the weld sample until the weld sample breaks at high temperatures. This process can effectively test the weld under extreme conditions. To further examine the weld sample's ability to withstand corrosive environments, piston 19 can be used to add an appropriate amount of acid or alkaline solution to liquid reservoir 18. The solution is then delivered to nozzles 1 and 2 through delivery pipes 20 and 22. These nozzles evenly spray the solution onto the weld sample surface, simulating a corrosive environment. Subsequently, motor 11 is restarted, rotating screw 12 and slider 13, which slides again. The upper clamping plate 9 again applies tension to the weld sample until it breaks in the corrosive solution. This series of operations not only tests the weld's strength under corrosive conditions but also assesses its performance under chemical attack, providing key data for the selection and optimization of weld materials.

[0035] Working principle: When using the device for testing, the weld sample is placed between the clamps 9 so that the side wall of the weld sample fits the rectangular shell 14. Then the hydraulic rod 4 is started to shrink, which drives the connecting block 5 to move, causing the rotating plate 10 to start rotating, thereby pulling the rotating bar 1 7 to rotate, driving the clamp 9 to move, and at the same time, the rotating bar 2 8 starts to rotate until the clamp 9 fits the weld sample, thereby clamping it. When the weld sample is fixed, the door panel 15 is closed and the heater 16 is started so that the heating rod 17 continues to emit heat, thereby increasing the temperature inside the rectangular shell 14. Then, the motor 11 is started to rotate the screw rod 12, so that the slider 1 3 starts to slide, so that the upper clamping plate 9 stretches the weld sample until the weld sample breaks, and then the performance of the weld sample under high temperature is tested. When it is necessary to test the tolerance of the weld sample in a corrosive environment, an acid or alkaline solution is added to the liquid storage tank 18 by opening the piston 19, and then it is transported to the nozzle 1 21 and the nozzle 2 23 through the delivery pipe 1 20 and the delivery pipe 2 22, so as to spray the surface of the weld sample. Then, the motor 11 is started again to rotate the screw rod 12 and the slider 13 starts to slide, so that the upper clamping plate 9 stretches the weld sample, so as to test it until the weld sample breaks.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tensile mechanism for testing weathering steel welds, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to a side plate (2), the upper surface of the base (1) is fixedly connected to a mounting plate (3), the interior of the mounting plate (3) is fixedly connected to a hydraulic rod (4), the output end of the hydraulic rod (4) is fixedly connected to a connecting block (5), the upper surface of the mounting plate (3) is fixedly connected to a fixed block (6), the side wall of the fixed block (6) is rotatably connected to a rotating bar (7), one end of the rotating bar (7) is rotatably connected to a clamping plate (9), the side wall of the fixed block (6) is rotatably connected to a rotating bar (8), one end of the rotating bar (8) is rotatably connected to the side wall of the clamping plate (9), the interior of the connecting block (5) is rotatably connected to a rotating plate (10), one end of the rotating plate (10) is rotatably connected to the interior of the rotating bar (7), and a tensile component is provided inside the side plate (2) for tensile testing steel welds.

2. The tensile mechanism for testing weathering steel welds according to claim 1, characterized in that: The side wall of the side plate (2) is fixedly connected to a rectangular shell (14), and the side wall of the rectangular shell (14) is provided with a door panel (15).

3. The tensile mechanism for testing weathering steel welds according to claim 1, characterized in that: The stretching assembly comprises a motor (11), a side wall of the motor (11) is fixedly connected to the upper surface of the side plate (2), an output end of the motor (11) is fixedly connected to a screw rod (12), and a side wall of the screw rod (12) is slidably connected to a slider (13).

4. The tensile mechanism for testing weathering steel welds according to claim 3, characterized in that: The side wall of the screw rod (12) is rotatably connected to the inside of the side plate (2), and the side wall of the slider (13) is fixedly connected to the side wall of the upper mounting plate (3).

5. The tensile mechanism for testing weathering steel welds according to claim 2, characterized in that: A heater (16) is fixedly connected to the side wall of the rectangular shell (14), a heating rod (17) is fixedly connected to the side wall of the heater (16), and one end of the heating rod (17) is fixedly connected to the inside of the rectangular shell (14).

6. The tensile mechanism for testing weathering steel welds according to claim 2, characterized in that: A liquid storage tank (18) is fixedly connected to the side wall of the rectangular housing (14), and a piston (19) is provided on the upper surface of the liquid storage tank (18).

7. The tensile mechanism for testing weathering steel welds according to claim 6, characterized in that: The side wall of the liquid storage tank (18) is fixedly connected to a delivery pipe (20), one end of the delivery pipe (20) is fixedly connected to a nozzle (21), and the side wall of the nozzle (21) is fixedly connected to the inside of the rectangular shell (14).

8. The tensile mechanism for testing weathering steel welds according to claim 6, characterized in that: The upper surface of the liquid storage tank (18) is fixedly connected to a second delivery pipe (22), one end of the second delivery pipe (22) is fixedly connected to a second nozzle (23), and the side wall of the second nozzle (23) is fixedly connected to the inside of the rectangular shell (14).