Steel member strength detection device, strength detection system and method

Abstract

The invention discloses a steel member strength detection device, a strength detection system and a strength detection method, and relates to the related technical field of material detection.The steel member strength detection device comprises an operation table, the operation table comprises a fixed table and two movable tables, the fixed table is fixedly installed on the ground, and the two movable tables are slidably installed on the two sides of the fixed table respectively; two telescopic frames are installed in the fixed table, one ends of the telescopic frames extend out of the side edge of the fixed table, the extending ends of the telescopic frames are connected with a movable table, clamps are movably installed at the upper end of the movable table, the two clamps are used for fixing the two ends of a steel component respectively, and the clamps can fix the two ends of the steel component through the sliding movable table. The middle part of the steel member is pressed through the hydraulic machine, so that the stress condition of the steel member under the actual working condition is simulated, and the problems that most of existing steel member detection devices cannot simulate the stress condition of the steel member under the actual working condition, and the accuracy of a detection result is influenced due to the fact that the actual condition is not met are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of material testing, and specifically to a steel member strength detection device, a strength detection system and a method. Background Art

[0002] Steel members are building or structural components made of steel, which are widely used in fields such as buildings, bridges, and industrial equipment. They are assembled into structures through welding, bolt connection or other means to bear, support, connect or transfer forces. Common steel members include steel beams, steel columns, steel pipes, etc. Due to their high strength, corrosion resistance, easy processing and other advantages, they are often used in structures bearing heavy loads. Therefore, the strength of steel members is very important.

[0003] In order to ensure the safety and reliability of steel members and avoid failures or accidents caused by material or structural problems, it is necessary to use a steel member strength detection device to detect steel members and test and evaluate the strength, stability, deformation, fatigue and other properties of steel members. Existing steel member detection methods include material detection, structural detection, non-destructive detection, fatigue detection, corrosion detection, structural health detection, static load detection, etc. Among them, applying pressure to steel members with a hydraulic press belongs to a kind of static load detection, which is usually used to evaluate the bearing capacity, strength, stiffness and deformation performance of steel members. In this process, the hydraulic press simulates the load conditions of steel members in actual use by applying gradually increasing pressure, so as to observe the reactions and performance of steel members.

[0004] When existing steel member detection hydraulic presses are used to detect long strip-shaped structural steel members of different lengths (such as angle steel, channel steel, I-beam, etc.), most of them use fixtures to fix both sides of the middle section of the steel member and apply pressure tests to the middle section of the steel member. However, in the actual application of steel members, the steel members are usually in a state of being fixed at both ends and stressed in the middle. Therefore, most existing steel member detection devices cannot simulate the stress conditions of steel members under actual working conditions, which does not conform to the actual situation and will affect the accuracy of the detection results. To solve the above-mentioned problems, a steel member strength detection device, a strength detection system and a method are provided herein. Summary of the Invention

[0005] The purpose of the present invention is to provide a steel member strength detection device, a strength detection system and a method to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A steel member strength detection device, including an operation table; The operation table includes a fixed table and two moving tables. The fixed table is fixedly installed on the ground, and the two moving tables are respectively slidably installed on both sides of the fixed table; Inside the fixed platform, two telescopic frames are installed. One end of each telescopic frame extends out from the side of the fixed platform, and the extended end of the telescopic frame is connected to the moving platform. A clamp is movably installed at the upper end of the moving platform, and the two clamps are respectively used to fix both ends of the steel member.

[0007] In a further embodiment, the telescopic frame is arranged as a scissor telescopic structure. Two supporting feet are provided at both ends of the telescopic frame. The two upper supporting feet are respectively rotatably installed in the fixed platform and the moving platform, and the two lower supporting feet are respectively slidably installed up and down in the fixed platform and the moving platform.

[0008] In a further embodiment, a side plate is slidably installed on the inner wall of the moving platform. A sliding groove matching the side plate is provided on the inner side wall of the moving platform, and the clamp is rotatably installed between the two side plates.

[0009] In a further embodiment, a sliding rod is fixedly installed in the sliding groove, and one side of the side plate is slidably sleeved on the outer side wall of the sliding rod.

[0010] In a further embodiment, a spring for applying elastic force to the side plate is installed in the sliding groove, and the spring is sleeved on the sliding rod.

[0011] In a further embodiment, the clamp includes a bottom plate, a cover plate and a clamping plate. The bottom plate is rotatably connected between the two side plates. One side of the cover plate is rotatably connected to the bottom plate, the other side of the cover plate is connected to the bottom plate by a buckle, the clamping plate is slidably installed in the cover plate, and a screw rod for controlling the movement of the cover plate is threadedly connected to the cover plate.

[0012] In a further embodiment, a plurality of moving wheels for moving the moving platform are installed at the lower end of the moving platform.

[0013] In a further embodiment, a side bar is fixedly connected to the side of the moving platform, and a support foot for fixing the moving platform is threadedly connected to the side bar.

[0014] The strength detection system includes the above-mentioned steel member strength detection device, and a hydraulic press; The hydraulic press is fixedly connected to the end face of the fixed platform, and the hydraulic cylinder of the hydraulic press is vertically aligned with the fixed platform.

[0015] Preferably, the steel member strength detection method includes the following steps: A1. Slide the two mobile stations to move them away from the fixed station. Rotate and unfold the cover plate. While moving the steel member, adjust the mobile stations to place the two ends of the steel member on the bottom plate respectively. Rotate the cover plate and connect it to the bottom plate. Tighten the screw rod to make the clamping plate slide downward to cooperate with the bottom plate to clamp and fix the steel member. The telescopic frame stabilizes the movement of the mobile station to keep the mobile station and the fixed station in the same vertical plane. Tighten the support feet so that the support feet contact and support on the ground. Start the hydraulic press, and the hydraulic press outputs to apply a downward pressure on the steel member. The pressure gradually increases. Observe or use equipment to monitor whether the steel member bends and breaks.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention relates to a steel member strength detection device, a strength detection system and a method. The fixture can fix the two ends of the steel member through the sliding mobile stations, and then apply pressure to the middle part of the steel member through the hydraulic press, so as to simulate the stress condition of the steel member under actual working conditions, and solve the problem that most of the existing steel member detection devices cannot simulate the stress condition of the steel member under actual working conditions, which does not conform to the actual situation and will affect the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the detection device according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the separated structure of the fixed station and the mobile station according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the sectional structure of the fixed station according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the mobile station according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the sectional structure of the side strip of the mobile station according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the fixture according to an embodiment of the present invention.

[0018] In the figure: 1, operation table; 2, hydraulic press; 3, fixed station; 31, telescopic frame; 4, mobile station; 41, side plate; 42, slide bar; 43, spring; 44, mobile wheel; 45, support foot; 5, fixture; 51, bottom plate; 52, cover plate; 53, clamping plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] See also Figure 1-6 This embodiment provides a steel member strength detection device, strength detection system and method, including an operating table 1 and a hydraulic press 2. The operating table 1 adopts a split structure, such as Figure 1 and Figure 2 As shown, the operating platform 1 includes a fixed platform 3 and a movable platform 4. The fixed platform 3 is preferably fixedly connected to the ground with bolts, and two movable platforms 4 are provided, and the two movable platforms 4 are slidably installed on both sides of the fixed platform 3. The hydraulic press 2 is a CNC hydraulic device with a reference model of Y21S-40. The hydraulic press 2 is fixedly connected to the end face of the fixed platform 3. The hydraulic cylinder of the hydraulic press 2 is located directly above the fixed platform 3 to ensure that the hydraulic cylinder can apply uniform pressure to the steel components located on the operating platform 1 during operation. The design of the hydraulic press 2 uses high-strength steel, which has strong pressure resistance and durability, and can maintain stable performance under long-term high-load working conditions. The hydraulic press 2 is connected to the operating platform 1 through a CNC system, which can accurately control the working parameters of the hydraulic cylinder, such as pressure, displacement and speed, according to different needs.

[0021] During use, the two mobile platforms 4 are slid away from the fixed platform 3. Long steel members such as angle steel, channel steel, or I-beam are moved by means of lifting equipment such as cranes and overhead cranes, so that the ends of the steel members are placed on the two mobile platforms 4, ensuring that the steel members are stably placed on the operating table to avoid deformation or instability due to uneven support. Subsequently, the hydraulic press 2 is started, and the output portion of the hydraulic press 2 contacts the steel member, gradually applying pressure to the middle section of the steel member. The hydraulic press 2 gradually increases the applied pressure according to preset parameters, ensuring that the applied pressure intensity and speed can be accurately controlled during the stress process of the steel member, avoiding excessive impact or uneven stress on the steel member.

[0022] While hydraulic press 2 is applying pressure to the steel structure, strain gauges can be used to measure the minute deformations or strains generated during the pressure application process. The reference strain gauge model is WX-YB1 surface strain gauge. By attaching strain gauges to key locations on the steel structure, such as the stress center, contact points, and areas of significant deformation, the stress state and deformation can be monitored in real time. This real-time data is transmitted to the control system, and through precise data analysis, the stress distribution and deformation of the steel structure at different pressure application stages are evaluated. The strain information recorded by the strain gauges can help analyze the structural strength of the steel structure, determine whether there is local stress concentration, excessive deformation, or critical failure, and thus assess the overall stability and load-bearing capacity of the steel structure.

[0023] Of course, displacement sensors can also be used to monitor the deformation of steel components during the pressure application process. The reference model of the displacement sensor is the WX106 eddy current displacement sensor. The displacement sensor can accurately measure the displacement of steel components at different pressure application stages, thereby understanding their stress conditions and deformation behavior. The displacement sensor can not only monitor the overall deformation of the steel component in real time, but also help determine whether there is local excessive deformation and whether there are structural weaknesses, thereby avoiding instability or rupture of the steel component due to excessive deformation. The device can accurately record the tiny displacements caused by the pressure on the steel component during the pressure application process, providing an important basis for subsequent analysis and ensuring the safety and durability of the steel component when under pressure.

[0024] In addition, an ultrasonic detection device, using the reference model Si2-Pro intelligent acoustic imager, is capable of monitoring internal defects and surface cracks in steel components. During the pressure application process of the hydraulic press 2, the ultrasonic detection device can monitor changes in the internal structure of the steel component in real time, such as cracks, pores, inclusions, and other defects, and determine the type, location, and size of the defect through changes in the echo signal. Ultrasonic detection technology can not only accurately locate potential internal defects, but also assess the impact of these defects on the overall strength of the steel component, ensuring that the steel component does not suffer irreversible damage during the stress process. Especially for some subtle internal defects, ultrasonic testing can conduct in-depth inspections without damaging the workpiece, avoiding structural failure or safety accidents caused by hidden dangers.

[0025] If more precise monitoring of steel component surface deformation is required, optical deformation measurement devices can be used. A reference model for this device is the DPHZ-2 optical distortion meter. These devices utilize advanced optical technologies (such as laser ranging and holographic interferometry) to monitor steel component surface deformation. The advantage of these technologies is that they are non-contact, avoiding direct contact with the steel component and eliminating the potential errors and surface effects of contact sensors. By projecting a laser beam or utilizing image recognition technology, optical deformation measurement devices can accurately and in real time acquire deformation data at every point on the steel component surface, analyzing deformation trends and distribution. This data is particularly important for high-precision deformation detection, especially in high-load, high-precision applications. Optical deformation measurement technology provides more detailed and reliable monitoring results, helping engineers determine the overall structural safety of the steel component and the potential for excessive deformation or fatigue damage during the stress application process, thus providing accurate decision-making support for subsequent work. By combining multiple high-precision detection methods, the condition of the steel component can be comprehensively monitored, ensuring its quality and safety throughout the stress application process.

[0026] like Figure 1 and Figure 2As shown, a concave surface is provided at the upper end of the fixed table 3. When pressing and detecting the steel member, the steel member is located at the concave surface of the fixed table 3 to limit the steel member and ensure that the hydraulic cylinder of the hydraulic press 2 is aligned with the steel member vertically, facilitating the deformation of the steel member under pressure. However, to ensure that the steel member is located at the concave surface of the fixed table 3, it is necessary to ensure that after the moving table 4 moves, the fixed table 3 and the two moving tables 4 are in the same vertical plane. Therefore, two telescopic frames 31 are installed inside the fixed table 3.

[0027] As Figure 2 , Figure 3 and Figure 4 shown, the telescopic frame 31 adopts a scissor telescopic structure, referring to the lifting structure of the middle section of the XDPT mobile lift. The scissor structure has a high load-bearing capacity and stability, and can maintain the rigidity and reliability of the structure while withstanding a large force. The two telescopic frames 31 are symmetrically distributed about the center. One end of the telescopic frame 31 extends from one side of the fixed table 3 and is installed inside the moving table 4. As Figure 2 shown, two feet are provided at both ends of the telescopic frame 31, and the feet on the same side are aligned vertically. Among them, the upper feet at both ends of the telescopic frame 31 are respectively rotatably installed inside the fixed table 3 and the moving table 4, and the lower feet at both ends of the telescopic frame 31 are respectively slidably installed up and down inside the fixed table 3 and the moving table 4. When pulling the moving table 4 to slide away from the fixed table 3, the overall length of the telescopic frame 31 increases and the thickness decreases, that is, the lower feet move upward. The sliding of the moving table 4 is limited by the telescopic frame 31 to ensure that the fixed table 3 and the two moving tables 4 are always in the same vertical plane.

[0028] As Figure 4 shown, moving wheels 44 are installed at the four corners of the lower end of the moving table 4. Through the moving wheels 44, the sliding of the moving table 4 can be facilitated. The moving wheels 44 can be driven by a motor, and the connection between the motor and the moving wheels 44 is realized through a reducer to achieve precise drive control, so that the moving table 4 can be stably and precisely controlled when adjusting the position, avoiding uneven sliding or out-of-control phenomena. This motor drive system can quickly adjust the position of the moving table 4 in a short time to meet the requirements for detecting different steel members. After the position of the moving table 4 is determined, in order to stabilize the moving table 4, a side bar is fixedly connected to the side of the moving table 4, and a support foot 45 is threadedly connected to the side bar. Among them, the side bar and the support foot 45 are preferably set to three, which are respectively located on the other three outer walls except the side where the telescopic frame 31 is installed. By tightening the support foot 45, the lower end of the support foot 45 can be made to contact and firmly support on the ground. The support foot 45 contacts the ground, which can effectively increase the friction coefficient with the ground, thereby providing a stronger fixing force. After the support foot 45 is tightened and in close contact with the ground, the moving table 4 can be effectively fixed through the damping effect generated, preventing it from displacing during the pressing process.

[0029] When a steel component is subjected to a compressive test, the two ends of the steel component are prone to shift on the moving platform 4 after being compressed. To stabilize the steel component, a fixture 5 is installed at the upper end of the moving platform 4. As Figure 4 shown, the fixture 5 includes a bottom plate 51, a cover plate 52 and a clamping plate 53. The bottom plate 51 is rotatably installed at the upper end of the moving platform 4. The bottom plate 51 and the cover plate 52 can be combined into a frame structure. Among them, one side of the cover plate 52 and the bottom plate 51 is rotatably connected, and the other side of the cover plate 52 and the bottom plate 51 is connected by a buckle. The clamping plate 53 is slidably installed up and down in the cover plate 52. A screw rod is rotatably connected to the upper end of the clamping plate 53, and a screw hole matching the screw rod is opened at the upper end of the cover plate 52. During use, rotate the cover plate 52 to expose the bottom plate 51, move the steel component, and place the two ends of the steel component on the bottom plates 51 of the two fixtures 5 respectively. Then rotate the cover plate 52 and connect the cover plate 52 and the bottom plate 51 through the buckle, that is, both ends of the steel component are located in the frame structure formed by the combination of the bottom plate 51 and the cover plate 52. At this time, tighten the screw rod to drive the clamping plate 53 to move downward. After the clamping plate 53 cooperates with the bottom plate 51 to clamp the steel component, the steel component can be fixed and limited to prevent the steel component from shifting after being compressed.

[0030] After the steel component is bent under compression, the distance between the two ends of the steel component is reduced. To compensate for the reduced distance between the two ends after the steel component is bent, the fixture 5 is slidably installed at the upper end of the moving platform 4. Specifically, sliding grooves are opened on both inner side walls at the upper end of the moving platform 4, and side plates 41 are installed at the sliding grooves. As Figure 6 shown, the side plate 41 includes a sliding strip and a connecting disk. The bottom plate 51 is rotatably connected to the connecting disk, that is, the bottom plate 51 is rotatably installed between the two side plates 41. The sliding strip of the side plate 41 is slidably installed in the sliding groove. To stabilize the sliding of the sliding strip of the side plate 41, a sliding rod 42 is fixedly installed in the sliding groove of the moving platform 4. The sliding strip is slidably sleeved on the sliding rod 42. The sliding strip is limited by the sliding rod 42 to prevent the sliding strip from being skewed or disengaging from the sliding groove. The two side plates 41 installed on the moving platform 4 can drive the fixture 5 to slide horizontally at the upper end of the moving platform 4. After the steel component is bent and the two ends approach each other, the steel component can drive the two fixtures 5 to rotate and tilt. At the same time, the two fixtures 5 slide synchronously and approach each other, and the sliding of the fixture 5 compensates for the distance generated by the bending of the steel component.

[0031] After the inspection of the steel component is completed, rotate and open the cover plate 52, and move and remove the steel component by a crane or a hoist. To quickly reset the fixture 5, a spring 43 is installed in the sliding groove of the moving platform 4. Among them, the spring 43 is sleeved on the outer side wall of the sliding rod 42, and one end of the spring 43 contacts the sliding strip of the side plate 41. The elastic force of the spring 43 can push the sliding strip, and then drive the two fixtures 5 to move away from each other and reset.

[0032] Compared with the existing steel component strength detection device, which clamps and fixes both sides of the steel component near the middle section by the fixture 5 and then conducts a pressure test on the steel component, the present invention, through the design of the split operation table 1, can adjust the spacing of the fixture 5 according to the length of the steel component, so as to more flexibly adapt to the detection requirements of steel components of different sizes. This design ensures that the two fixtures 5 can accurately clamp both ends of the steel component, ensuring uniform distribution of force during pressure application and effectively simulating the stress conditions in actual use. Different from traditional detection devices, the present invention can adapt to steel components by adjusting the spacing of the fixture 5 at different steel component lengths, enabling the device to adapt to a wider range of application scenarios. Especially when dealing with long strip steel components, it has better flexibility and adaptability. In actual applications, steel components usually present a state of being fixed at both ends and stressed in the middle. For example, in a building structure, a steel beam is often supported at both ends, while the middle part is subjected to gravity or other external forces, so the middle part needs to bear a large amount of pressure. This structural form of being fixed at both ends and stressed in the middle places higher requirements on the strength and stability of steel components. Therefore, adopting the two-end fixed detection device of the present invention can more realistically simulate the stress state of steel components in the actual working environment, making the detected strength data more reliable and true. In this way, the detection results can not only reflect the bearing capacity of steel components under actual working conditions, but also provide a more accurate basis for design, production and safety assessment.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel component strength detection device, characterized in that, Comprising: Operating table (1); The operating table (1) includes a fixed table (3) and two movable tables (4). The fixed table (3) is fixedly installed on the ground, and the two movable tables (4) are respectively slidably installed on both sides of the fixed table (3); Two telescopic frames (31) are installed inside the fixed table (3). One end of the telescopic frame (31) extends out from the side of the fixed table (3), and the extended end of the telescopic frame (31) is connected to the movable table (4). A clamp (5) is movably installed at the upper end of the movable table (4), and the two clamps (5) are respectively used to fix both ends of the steel member.

2. The strength detection device for steel members according to claim 1, characterized in that: The telescopic frame (31) is set as a scissor telescopic structure. Both ends of the telescopic frame (31) are provided with two support feet. The two support feet located at the upper end are respectively rotatably installed in the fixed table (3) and the movable table (4), and the two support feet located at the lower end are respectively slidably installed up and down in the fixed table (3) and the movable table (4).

3. The steel member strength detection device according to claim 2, characterized in that: A side plate (41) is slidably installed on the inner wall of the movable table (4). A chute matching the side plate (41) is opened on the inner side wall of the movable table (4), and the clamp (5) is rotatably installed between the two side plates (41).

4. A steel member strength detection device according to claim 3, characterized in that: A slide bar (42) is fixedly installed in the chute, and one side of the side plate (41) is slidably sleeved on the outer side wall of the slide bar (42).

5. The strength detection device for steel members according to claim 4, characterized in that: A spring (43) for applying elastic force to the side plate (41) is installed in the chute, and the spring (43) is sleeved on the slide bar (42).

6. The steel member strength detection device according to claim 5, characterized in that: The clamp (5) includes a bottom plate (51), a cover plate (52) and a clamping plate (53). The bottom plate (51) is rotatably connected between the two side plates (41). One side of the cover plate (52) is rotatably connected to the bottom plate (51), and the other side of the cover plate (52) is connected to the bottom plate (51) by a buckle. The clamping plate (53) is slidably installed in the cover plate (52), and a screw rod for controlling the movement of the cover plate (52) is threadedly connected to the cover plate (52).

7. The strength detection device for steel members according to claim 3, characterized in that: A plurality of moving wheels (44) for moving the movable table (4) are installed at the lower end of the movable table (4).

8. The steel member strength detection device according to claim 7, wherein: A side strip is fixedly connected to the side of the movable table (4), and a support foot (45) for fixing the movable table (4) is threadedly connected to the side strip.

9. The strength detection system includes a steel member strength detection device according to any one of claims 1 to 8, characterized in that it further includes a hydraulic press (2); The hydraulic press (2) is fixedly connected to the end face of the fixed table (3), and the hydraulic cylinder of the hydraulic press (2) is vertically aligned with the fixed table (3).

10. Method for detecting the strength of steel members, characterized in that, Comprising the following steps: A1. Slide the two mobile platforms (4) to move the two mobile platforms (4) away from the fixed platform (3). Rotate to unfold the cover plate (52). While moving the steel member, move and adjust the mobile platform (4) so that the two ends of the steel member are respectively placed on the bottom plate (51). Rotate the cover plate (52) and connect the cover plate (52) and the bottom plate (51). Tighten the screw rod to make the clamping plate (53) slide downward to cooperate with the bottom plate (51) to clamp and fix the steel member. The telescopic frame (31) stabilizes the movement of the mobile platform (4) so that the mobile platform (4) and the fixed platform (3) are kept in the same vertical plane. Tighten the support feet (45) so that the support feet (45) contact and support on the ground. Start the hydraulic press (2). The hydraulic press (2) outputs a downward pressure on the steel member, and the pressure gradually increases. Observe or use equipment to monitor whether the steel member bends and breaks.

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