Hot-rolled H-shaped steel fatigue detection device and method

Abstract

The invention discloses a hot-rolled H-shaped steel fatigue detection device and method.The detection device comprises a base, a fixed table and a fixed seat, the fixed table is arranged at one end of the base, and a clamping assembly is arranged on the fixed table and used for clamping one end of H-shaped steel; the fixed seat is fixedly arranged at the other end of the base; a movable seat is arranged on the fixed seat in a sliding mode, a lower hydraulic cylinder is fixedly arranged on the movable seat, a fixed frame is fixedly arranged on the movable seat, an upper hydraulic cylinder is arranged on the fixed frame, the upper hydraulic cylinder is located above the lower hydraulic cylinder, and a clamping assembly is arranged between the upper hydraulic cylinder and the lower hydraulic cylinder. The two ends of the H-shaped steel are fixedly clamped on the two clamping assemblies, the clamping assembly arranged on the fixing table is fixedly arranged, and the clamping assembly at the other end swings and shakes under the driving of the upper hydraulic cylinder and the lower hydraulic cylinder, so that the H-shaped steel shakes, the fatigue of the H-shaped steel is detected, the fatigue detection of the whole H-shaped steel can be realized, and the detection result is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of fatigue detection, and in particular to a hot-rolled H-beam fatigue detection device and method. Background Art

[0002] H-shaped steel is an economical and efficient profile with an optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. It is named because its cross-section resembles the English letter "H". With the rapid construction of infrastructure, H-shaped steel has been widely used due to its advantages such as strong load-bearing capacity and short construction period. However, H-shaped steel is generally produced using a hot-rolling process. After being used as a pillar, H-shaped steel will produce slight swings in windy and rainy weather due to the complex and changeable outdoor environment. In extreme weather, the swing amplitude will increase. After prolonged swinging, the H-shaped steel may crack or break. Changes in ambient temperature will also have a certain impact on the H-shaped steel. Therefore, H-shaped steel needs to undergo fatigue testing before leaving the factory to meet design requirements. However, H-shaped steel is relatively long after production. H-shaped steel used as a pillar is generally used in a universal length of 12 meters. However, the conventional fatigue testing method is to cut a sample of a portion of the H-shaped steel for testing. It cannot be used for fatigue testing of the entire H-shaped steel. Therefore, the test results may be biased, reducing accuracy. Summary of the Invention

[0003] The object of the present invention is to provide a hot-rolled H-beam fatigue detection device and method to address the deficiencies of the prior art.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: A hot-rolled H-beam fatigue detection device comprises a base; A fixing platform is provided at one end of the base, and a clamping assembly is provided on the fixing platform for clamping one end of the H-shaped steel; A fixed seat, fixedly arranged at the other end of the base; A movable seat is slidably arranged on the fixed seat, and a lower hydraulic cylinder is arranged on the movable seat; The fixed frame is fixedly arranged on the movable seat. The fixed frame is provided with an upper hydraulic cylinder. A clamping assembly is provided between the upper hydraulic cylinder and the lower hydraulic cylinder.

[0005] Preferably, the clamping assembly includes a fixed block, a mounting groove is provided on the fixed block, a clamping hydraulic cylinder is fixedly installed in the mounting groove, and there are multiple clamping hydraulic cylinders, which are evenly arranged along the circumferential direction for clamping and fixing the H-shaped steel.

[0006] Preferably, a reinforcement ring is fixedly provided on the outer wall of the fixing block to enhance the strength of the fixing block.

[0007] Preferably, a translation hydraulic cylinder is fixedly provided on the base, and two translation hydraulic cylinders are provided. The two translation hydraulic cylinders are symmetrically arranged on both sides of the movable seat, and the piston rods of the translation hydraulic cylinders are fixedly connected to the movable seat.

[0008] Preferably, a support assembly is slidably provided on the base, and the support assembly is located between the fixed platform and the fixed seat. The support assembly includes a support platform, a connecting groove is provided on the support platform, a lower support roller is rotatably provided at the bottom of the connecting groove, and an upper support roller is rotatably provided at the top of the connecting groove, and the H-shaped steel is located between the lower support roller and the upper support roller.

[0009] Preferably, side rollers are rotatably provided in the connecting groove, and two side rollers are provided, and the two side rollers are located on both sides of the H-shaped steel.

[0010] Preferably, a slide groove is provided on the base, the slide groove is located between the fixed platform and the fixed seat, and the support platform is slidably arranged in the slide groove.

[0011] Preferably, a temperature regulating component is also provided, which includes an upper insulation cover and a lower insulation cover. The upper insulation cover and the lower insulation cover are fixedly connected by a snap fastener. When the upper insulation cover and the lower insulation cover are closed, the H-shaped steel is wrapped. The upper insulation cover and the lower insulation cover are both connected to an air inlet duct.

[0012] Preferably, the upper heat-insulating cover and the lower heat-insulating cover are both made of flexible materials, and a plurality of semicircular steel ring frames are provided in the upper heat-insulating cover and the lower heat-insulating cover.

[0013] A hot-rolled H-beam fatigue detection method comprises the following steps: S1. One end of the H-beam is fixed to the clamping assembly of the fixed table, and the other end is fixed to the clamping assembly of the fixed frame; S2. Move the support assembly to the measurement position of the H-beam, so that the support assembly can support the H-beam; S3. Close the upper and lower insulation covers and wrap them around the H-shaped steel. The air inlet duct blows air inside to regulate the internal temperature. S4. Perform fatigue testing on the H-beam by moving the clamping assembly by extending and retracting the upper hydraulic cylinder, the lower hydraulic cylinder, or the translation hydraulic cylinder.

[0014] The beneficial effects of adopting the above technical solution are: 1. In the present invention, fatigue testing can be performed on an entire H-beam. The two ends of the H-beam are respectively fixed to the clamping assembly of the fixed platform and the clamping assembly of the fixed frame. The upper hydraulic cylinder, the lower hydraulic cylinder, and the translation hydraulic cylinder on the fixed frame are extended and retracted to drive the clamping assembly to shake, thereby causing the H-beam to sway. This allows fatigue testing of the H-beam to be performed, and the data obtained can be more accurate. 2. In the present invention, the support assembly can slide on the base and support the H-beam. When the H-beam is shaken, fatigue detection can be performed on different positions of the H-beam by moving the support assembly. 3. In the present invention, the upper insulation cover and the lower insulation cover can wrap the H-shaped steel after being closed. After wrapping, cold air or hot air is blown into the interior through the air inlet duct to adjust the internal temperature, so that the fatigue life of the H-shaped steel under different temperature environments can be detected, making the detection results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the support assembly of the present invention; Figure 3 yes Figure 2 A magnified view of part A; Figure 4 It is a schematic structural diagram of the clamping assembly of the present invention; Figure 5 is a schematic structural diagram of a clamping assembly according to another embodiment of the present invention; Figure 6 It is a three-dimensional schematic diagram of the temperature adjustment component of the present invention.

[0016] In the figure: 1 is the base, 2 is the fixed platform, 3 is the fixed seat, 4 is the movable seat, 5 is the lower hydraulic cylinder, 6 is the upper hydraulic cylinder, 7 is the fixed block, 8 is the mounting groove, 9 is the clamping hydraulic cylinder, 10 is the reinforcement ring, 11 is the translation hydraulic cylinder, 12 is the support platform, 13 is the connecting groove, 14 is the lower support roller, 15 is the upper support roller, 16 is the side roller, 17 is the slide, 18 is the upper insulation cover, 19 is the lower insulation cover, 20 is the air inlet duct, 21 is the fixed frame, 22 is the web hydraulic cylinder, 23 is the first wing plate hydraulic cylinder, 24 is the second wing plate hydraulic cylinder, 25 is the connecting rod, 26 is the adjusting hydraulic cylinder, 27 is the connecting block, 28 is the baffle, and 29 is the vent. DETAILED DESCRIPTION

[0017] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] like Figure 1 As shown, a hot-rolled H-beam fatigue detection device includes a base 1, a fixed platform 2 and a fixed seat 3. The base 1 is fixedly set on the ground, the fixed platform 2 is fixedly set at one end of the base 1, and a clamping assembly is set on the fixed platform 2. The clamping assembly is used to clamp and fix one end of the H-beam. The fixed seat 3 is fixedly set at the other end of the base 1. A movable seat 4 is horizontally slidably set on the fixed seat 3. The sliding direction of the movable seat 4 is perpendicular to the length direction of the H-beam. A fixed frame 21 is fixed on the movable seat 4. The fixed frame 21 is "7". The H-shaped structure includes a vertical rod and a horizontal rod. The vertical rod of the fixed frame 21 is vertically fixed on the upper end surface of the movable seat 4, and the horizontal rod is horizontally fixed on the upper end of the vertical rod. An upper hydraulic cylinder 6 is fixed on the horizontal rod of the fixed frame 21, and a lower hydraulic cylinder 5 is fixed on the upper end surface of the movable seat 4. A clamping assembly is provided between the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5. The clamping assembly is connected to the piston rods of the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5. The two clamping assemblies have the same structure and are respectively used to clamp and fix the two axial ends of the H-shaped steel.

[0021] In the present invention, one end of the H-shaped steel is fixed on the clamping assembly of the fixed platform 2, and the other end is fixed on the clamping assembly between the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5. After clamping, the piston rods of the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5 are continuously extended and retracted, driving the clamping assembly to continuously swing up and down, causing one end of the H-shaped steel to swing up and down, thereby allowing fatigue detection of the H-shaped steel. The movable seat 4 continuously slides back and forth horizontally on the fixed seat 3, which can also cause the H-shaped steel to continuously swing in the horizontal direction, thereby detecting fatigue of the H-shaped steel in the left and right directions.

[0022] Furthermore, the cylinder barrel of the upper hydraulic cylinder 6 is hinged to the cross bar of the fixed frame 21, the piston rod of the upper hydraulic cylinder 6 is hinged to the clamping assembly, the cylinder barrel of the lower hydraulic cylinder 5 is hinged to the upper end surface of the movable seat 4, and the piston rod of the lower hydraulic cylinder 5 is hinged to the clamping assembly. The clamping assembly can be driven to swing up and down by the extension and contraction of the piston rod of the upper hydraulic cylinder 6 and the piston rod of the lower hydraulic cylinder 5, while the clamping assembly arranged on the fixed platform 2 is fixed. Therefore, one end of the H-shaped steel can be fixed and the other end can be swung up and down, thereby performing fatigue detection on the H-shaped steel in the up and down directions until the H-shaped steel cracks or breaks; similarly, after the piston rods of the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5 are fixed, the H-shaped steel can be swung left and right by swinging the movable seat 4 left and right on the fixed seat 3, thereby detecting the fatigue of the H-shaped steel in the left and right directions.

[0023] Furthermore, if Figure 4 As shown, the clamping assembly includes a fixed block 7, a mounting groove 8 is opened on the fixed block 7, a clamping hydraulic cylinder 9 is fixedly arranged in the mounting groove 8, a plurality of clamping hydraulic cylinders 9 are provided, and the plurality of clamping hydraulic cylinders 9 are evenly arranged along the circumferential direction for clamping and fixing the H-shaped steel. In this embodiment, four clamping hydraulic cylinders 9 are provided, and the four clamping hydraulic cylinders 9 are respectively used to clamp and fix the four sides of the H-shaped steel to clamp the H-shaped steel.

[0024] It should be noted that the fixed block 7 located on the fixed platform 2 is fixedly connected to the fixed platform 2, so that the H-shaped steel is fixed at one end of the fixed platform 2, and the fixed block 7 located between the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5 is hinged to the piston rods of the upper hydraulic cylinder 6 and the lower hydraulic cylinder 5 respectively, so that the other end of the H-shaped steel can swing.

[0025] Furthermore, a reinforcement ring 10 is fixedly provided on the outer wall of the fixing block 7 to enhance the strength of the fixing block 7 .

[0026] In another embodiment, Figure 5As shown, the clamping assembly includes a fixed block 7, a mounting groove 8 is opened on the fixed block 7, the H-shaped steel is inserted into the mounting groove 8, the web of the H-shaped steel is placed horizontally, and the wing plates at both ends of the web are set vertically. Two web hydraulic cylinders 22 are provided in the mounting groove 8, and the two web hydraulic cylinders 22 are respectively located above and below the web of the H-shaped steel. The piston rod of the web hydraulic cylinder 22 abuts against the web of the H-shaped steel and clamps it. A first wing hydraulic cylinder 23 is fixed on the piston rod of the web hydraulic cylinder 22, and the piston rod of the web hydraulic cylinder 22 is in contact with the first wing hydraulic cylinder. The cylinder barrels of 23 can be fixedly connected by welding. Two first wing plate hydraulic cylinders 23 are provided on the piston rod of each web plate hydraulic cylinder 22. The piston rods of the two first wing plate hydraulic cylinders 23 are respectively in contact with a wing plate. At the same time, four second wing plate hydraulic cylinders 24 are also provided in the mounting groove 8. The four second wing plate hydraulic cylinders 24 are evenly distributed on both sides of the H-shaped steel. The piston rods of the second wing plate hydraulic cylinders 24 are in contact with the wing plates of the H-shaped steel. The second wing plate hydraulic cylinders 24 and the first wing plate hydraulic cylinders 23 work together to clamp and fix the wing plates of the H-shaped steel.

[0027] Furthermore, a translation hydraulic cylinder 11 is fixedly provided on the base 1. There are two translation hydraulic cylinders 11, which are symmetrically arranged on both sides of the mobile seat 4. The piston rod of the translation hydraulic cylinder 11 is fixedly connected to the mobile seat 4, and the cylinder barrel of the translation hydraulic cylinder 11 is fixedly connected to the base 1. The piston rod of the translation hydraulic cylinder 11 can be extended and retracted to drive the mobile seat 4 to swing left and right on the fixed seat 3.

[0028] It should be noted that a T-slot is provided on the upper end surface of the fixed seat 3, and the lower part of the movable seat 4 is clamped in the T-slot. The movable seat 4 can slide in the T-slot of the fixed seat 3 during the sliding process, making the sliding of the movable seat 4 more stable and avoiding vibration interference.

[0029] Furthermore, if Figure 2 and Figure 3The support rail 12 is provided with a support assembly which is slidably mounted on the base 1 and is located between the fixed platform 2 and the fixed seat 3. The support assembly includes a support platform 12 which is slidably mounted on the base 1. The sliding direction of the support platform 12 is parallel to the length direction of the H-shaped steel. A connecting groove 13 is provided on the support platform 12. The connecting groove 13 passes through the support platform 12, and the H-shaped steel can pass through the connecting groove 13. A lower supporting roller 14 is rotatably mounted at the bottom of the connecting groove 13, and an upper supporting roller 15 is rotatably mounted at the top of the connecting groove 13. The H-shaped steel is located between the lower supporting roller 14 and the upper supporting roller 15. The lower supporting roller 14 and the upper supporting roller 15 are in rolling contact with the lower end face and the upper end face of the H-shaped steel and can clamp the H-shaped steel. When the H-shaped steel swings up and down, the lower supporting roller 14 and the upper supporting roller 15 can support the upper and lower end faces of the H-shaped steel. At this time, fatigue detection can be performed on the supporting points of the upper supporting roller 15 and the lower supporting roller 14. Fatigue detection of any position of the H-shaped steel can be achieved by sliding the support assembly on the base 1.

[0030] Furthermore, side rollers 16 are rotatably arranged in the connecting groove 13. There are two side rollers 16, which are located on both sides of the H-shaped steel. The side rollers 16 are in rolling contact with the side plates of the H-shaped steel and can clamp the H-shaped steel. Similarly, when the H-shaped steel swings left and right, the two side rollers 16 can support the H-shaped steel and perform fatigue detection on the contact position between the side rollers 16 and the H-shaped steel.

[0031] Furthermore, connecting rods 25 are provided at both ends of the lower support roller 14, the upper support roller 15 and the side rollers 16. The lower support roller 14, the upper support roller 15 and the side rollers 16 are all rotatably connected to the connecting rods 25. An adjusting hydraulic cylinder 26 is fixedly connected to the connecting rod 25. The connecting rod 25 is fixedly connected to the piston rod of the adjusting hydraulic cylinder 26. The adjusting hydraulic cylinder 26 is fixedly arranged in the connecting groove 13. The position of the lower support roller 14, the upper support roller 15 and the side rollers 16 can be adjusted by extending and retracting the piston rod of the adjusting hydraulic cylinder 26, so that the H-shaped steel can be clamped and can adapt to H-shaped steels of different sizes.

[0032] Furthermore, a slide groove 17 is provided on the base 1, and the slide groove 17 is a T-shaped groove. The slide groove 17 is located between the fixed platform 2 and the fixed seat 3. The lower part of the support platform 12 is slidably set in the slide groove 17, so that the support assembly can slide on the base 1, thereby realizing position adjustment and being able to perform fatigue detection on any part of the H-shaped steel.

[0033] Furthermore, if Figure 6As shown, a temperature regulating component is also provided, and the temperature regulating component includes an upper insulation cover 18 and a lower insulation cover 19. The upper insulation cover 18 and the lower insulation cover 19 are both semicircular structures. The upper insulation cover 18 and the lower insulation cover 19 are fixedly connected by a buckle. The buckle and the buckle connection method of the upper insulation cover 18 and the lower insulation cover 19 are all existing technologies and will not be repeated here. After the upper insulation cover 18 and the lower insulation cover 19 are closed, the H-shaped steel is wrapped. The upper insulation cover 18 and the lower insulation cover 19 are both connected to an air inlet duct 20. In this embodiment, when fatigue testing is performed on the H-shaped steel, the upper insulation cover 18 and the lower insulation cover 19 can be closed and fixedly connected. After the connection, hot air or cold air is blown into the interior through the air inlet duct 20, so as to regulate the temperature inside the upper insulation cover 18 and the lower insulation cover 19, simulating the ambient temperature of the H-shaped steel under use. Fatigue testing is performed after the temperature adjustment is completed, which can make the test results more accurate.

[0034] In another embodiment, connecting blocks 27 are fixedly provided on the upper thermal insulation cover 18 and the lower thermal insulation cover 19. When the upper thermal insulation cover 18 and the lower thermal insulation cover 19 are closed, the connecting blocks 27 on the upper thermal insulation cover 18 and the connecting blocks 27 on the lower thermal insulation cover 19 abut against each other, and the two connecting blocks 27 are fixedly connected by bolts, so that the upper thermal insulation cover 18 and the lower thermal insulation cover 19 are fixedly connected.

[0035] It should be noted that one end of the air inlet duct 20 is connected to a hot air blower and the other end is connected to a refrigeration device. The equipment can be switched according to the detection requirements. The hot air blower belongs to the existing technology, and the refrigeration equipment can adopt air conditioning. The air outlet of the air conditioner is connected to the air inlet duct 20. The air conditioner also belongs to the existing technology and will not be repeated here. When hot air needs to be blown in, turn on the hot air blower and turn off the air conditioner at the same time, so that the hot air blown out by the hot air blower is sent into the upper insulation cover 18 and the lower insulation cover 19 through the air inlet duct 20; similarly, when cold air needs to be blown in, turn on the air conditioner and turn off the hot air blower at the same time, and blow the cold air into the upper insulation cover 18 and the lower insulation cover 19 to cool down.

[0036] Furthermore, the upper insulation cover 18 and the lower insulation cover 19 are both made of flexible materials, and multiple semicircular steel ring frames are provided in the upper insulation cover 18 and the lower insulation cover 19, so that the upper insulation cover 18 and the lower insulation cover 19 can be extended and retracted to adjust the length; since the support component needs to be positioned on the base 1, two groups of temperature adjustment components are provided, and the two groups of temperature adjustment components are respectively located on both sides of the support component. When the position of the support component is adjusted, the upper insulation cover 18 and the lower insulation cover 19 are extended and retracted to adjust the position, so that the upper insulation cover 18 and the lower insulation cover 19 can wrap most of the H-shaped steel, making the ambient temperature of the H-shaped steel more stable, thereby improving the detection accuracy.

[0037] Furthermore, the structure and manufacturing method of the upper insulation cover 18 and the lower insulation cover 19 are the same. The outside is wrapped with a polymer plastic cloth, and the inside of the polymer plastic cloth is filled with slag wool or pearl cotton to play a role in thermal insulation. A semicircular steel ring frame is provided inside the slag wool or pearl cotton. There are multiple steel ring frames arranged in parallel. The steel ring frames can play a supporting role, so that the upper insulation cover 18 and the lower insulation cover 19 can maintain a semicircular structure. The steel ring frame can be made of 65Mn spring steel flat wire with a cross-section of 4mm*2.5mm. The semicircular arc diameter of the steel ring frame is 450mm.

[0038] Furthermore, baffles 28 are fixedly provided at both ends of the upper insulation cover 18 and the lower insulation cover 19, and slots are provided on the baffles 28. Vents 29 are also provided on the baffles 28. When the upper insulation cover 18 and the lower insulation cover 19 are closed, the H-shaped steel is clamped in the slots of the baffles 28. After the two baffles 28 abut against each other, they support the upper insulation cover 18 and the lower insulation cover 19. When the air inlet duct blows air into the interior, the air inside the upper insulation cover 18 and the lower insulation cover 19 can be discharged from the vents 29, thereby realizing air circulation.

[0039] A hot-rolled H-beam fatigue detection method comprises the following steps: S1. One end of the H-beam is fixed to the clamping assembly of the fixed table, and the other end is fixed to the clamping assembly of the fixed frame; S2. Move the support assembly to the measurement position of the H-beam, so that the support assembly can support the H-beam; S3. Close the upper and lower insulation covers and wrap them around the H-shaped steel. The air inlet duct blows air inside to regulate the internal temperature. S4. Perform fatigue testing on the H-beam by moving the clamping assembly by extending and retracting the upper hydraulic cylinder, the lower hydraulic cylinder, or the translation hydraulic cylinder.

[0040] Furthermore, when fatigue testing is performed on H-beams, it can be divided into conventional fatigue testing and low-temperature fatigue testing. During conventional fatigue testing, the H-beams are regularly shaken at temperatures of 25°C and 0°C until cracks or fractures appear on the H-beams, and the number of shakes when cracks or fractures appear is recorded. During low-temperature fatigue testing, the H-beams are irregularly shaken at temperatures of -20°C and -40°C until cracks or fractures appear on the H-beams, and the number of shakes when cracks or fractures appear is recorded.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hot-rolled H-beam fatigue detection device, characterized in that: including a base (1); A fixing platform (2) is arranged at one end of the base (1), and a clamping assembly is provided on the fixing platform (2) for clamping one end of the H-shaped steel; A fixed seat (3) is fixedly arranged at the other end of the base (1); A movable seat (4) is slidably arranged on the fixed seat (3), and a lower hydraulic cylinder (5) is arranged on the movable seat (4); A fixed frame (21) is fixedly arranged on the movable seat (4); an upper hydraulic cylinder (6) is arranged on the fixed frame (21); and a clamping assembly is provided between the upper hydraulic cylinder (6) and the lower hydraulic cylinder (5).

2. A hot-rolled H-beam fatigue detection device according to claim 1, characterized in that: The clamping assembly comprises a fixed block (7), a mounting groove (8) is provided on the fixed block (7), a clamping hydraulic cylinder (9) is fixedly provided in the mounting groove (8), a plurality of the clamping hydraulic cylinders (9) are provided, and the plurality of clamping hydraulic cylinders (9) are evenly arranged along the circumferential direction for clamping and fixing the H-shaped steel.

3. The hot-rolled H-beam fatigue detection device according to claim 2, characterized in that: A reinforcement ring (10) is fixedly provided on the outer wall of the fixing block (7) to enhance the strength of the fixing block (7).

4. The hot-rolled H-beam fatigue detection device according to claim 1, characterized in that: A translation hydraulic cylinder (11) is fixedly provided on the base (1), and two translation hydraulic cylinders (11) are provided. The two translation hydraulic cylinders (11) are symmetrically arranged on both sides of the movable seat (4), and the piston rods of the translation hydraulic cylinders (11) are fixedly connected to the movable seat (4).

5. The hot-rolled H-beam fatigue detection device according to claim 1, characterized in that: A support assembly is slidably provided on the base (1), and the support assembly is located between the fixed platform (2) and the fixed seat (3). The support assembly includes a support platform (12), and the support platform (12) is slidably provided on the base (1). A connecting groove (13) is provided on the support platform (12), and a lower supporting roller (14) is rotatably provided at the bottom of the connecting groove (13), and an upper supporting roller (15) is rotatably provided at the top of the connecting groove (13), and the H-shaped steel is located between the lower supporting roller (14) and the upper supporting roller (15).

6. The hot-rolled H-beam fatigue detection device according to claim 5, characterized in that: A side roller (16) is also rotatably provided in the connection groove (13), and two side rollers (16) are provided. The two side rollers (16) are located on both sides of the H-shaped steel.

7. The hot-rolled H-beam fatigue detection device according to claim 5, characterized in that: The base (1) is provided with a slide groove (17), the slide groove (17) is located between the fixed platform (2) and the fixed seat (3), and the support platform (12) is slidably arranged in the slide groove (17).

8. The hot-rolled H-beam fatigue detection device according to claim 1, characterized in that: A temperature regulating assembly is also provided, the temperature regulating assembly comprising an upper heat-insulating cover (18) and a lower heat-insulating cover (19), the upper heat-insulating cover (18) and the lower heat-insulating cover (19) being fixedly connected by a buckle, the upper heat-insulating cover (18) and the lower heat-insulating cover (19) being closed to wrap the H-shaped steel, and the upper heat-insulating cover (18) and the lower heat-insulating cover (19) being connected to an air inlet duct (20).

9. The hot-rolled H-beam fatigue detection device according to claim 8, characterized in that: The upper heat-insulating cover (18) and the lower heat-insulating cover (19) are both made of flexible materials, and a plurality of semicircular steel ring frames are provided inside the upper heat-insulating cover (18) and the lower heat-insulating cover (19).

10. A hot-rolled H-beam fatigue detection method, characterized in that: The fatigue detection device according to any one of claims 1 to 9 comprises the following steps: S1. One end of the H-beam is fixed to the clamping assembly of the fixed table, and the other end is fixed to the clamping assembly of the fixed frame; S2. Move the support assembly to the measurement position of the H-beam, so that the support assembly can support the H-beam; S3. Close the upper and lower insulation covers and wrap them around the H-shaped steel. The air inlet duct blows air inside to regulate the internal temperature. S4. Perform fatigue testing on the H-beam by moving the clamping assembly by extending and retracting the upper hydraulic cylinder, the lower hydraulic cylinder, or the translation hydraulic cylinder.

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