A construction steel strength detection device that is convenient for switching detection positions

Abstract

The present invention relates to the technical field of strength detection devices, and in particular to a construction steel strength detection device that is convenient for switching detection positions, comprising a base plate, transmission structures are installed on both the left and right sides of the upper surface of the base plate, U-shaped limit plates are installed on both the left and right sides of the upper surface of the base plate, the U-shaped limit plates are located above the transmission structure, a U-shaped fixed plate is installed in the middle of the upper surface of the base plate, a push rod is installed in the middle of the upper surface of the U-shaped fixed plate, a connecting block is installed on the output end of the push rod that movably passes through the U-shaped fixed plate, a pressure sensor is installed on the lower surface of the connecting block, a pressure block is installed on the lower surface of the pressure sensor, and a box body is installed on one side of the upper surface of the base plate. The present invention facilitates the control of uniform deformation during strength detection through mutual cooperation between structures, can make the measurement results more accurate, and improves the reliability of data by performing strength detection on different positions of steel.

Description

Technical Field

[0001] The present invention relates to the technical field of steel strength detection devices, and in particular to a construction steel strength detection device that is convenient for switching detection positions. Background Art

[0002] Steel is a material of certain shape, size and performance made by ingots, billets or steel through pressure processing. Most steel processing is done through pressure processing, which causes plastic deformation of the processed steel. According to the different processing temperatures of steel, it can be divided into cold processing and hot processing. Steel is currently widely used, but the steps for strength testing of existing steel are very cumbersome. Therefore, the strength of steel cannot be tested before construction, which is easy to cause engineering problems.

[0003] The existing steel strength testing device generally has complicated testing steps and is not suitable for testing at construction sites. In addition, the steel strength test is generally performed by applying pressure to the steel until a certain deformation is achieved to evaluate its strength. However, the existing steel strength testing device is not convenient for switching the testing position and performing strength testing on different positions of the steel. In addition, when testing the steel, the deformation of the steel is not easy to control, resulting in a certain deviation in the tested data. For this reason, we propose a construction steel strength testing device that is easy to switch the testing position. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a construction steel strength detection device which is convenient for switching the detection position. The device has a reasonable design and an ingenious structure. Through the mutual cooperation between the structures, it is convenient to control the uniformity of the deformation amount during the strength detection process, which can make the measurement result more accurate. By performing strength detection on different positions of the steel, the reliability of the data is improved. The device has good market competitiveness and is worthy of recommendation.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A construction steel strength detection device that is convenient for detecting position switching is designed, comprising a base plate, transmission structures are installed on the left and right sides of the upper surface of the base plate, U-shaped limit plates are installed on the left and right sides of the upper surface of the base plate, the U-shaped limit plates are located above the transmission structure, a U-shaped fixing plate is installed in the middle of the upper surface of the base plate, a push rod is installed in the middle of the upper surface of the U-shaped fixing plate, the output end of the push rod movably penetrates the U-shaped fixing plate and is installed with a connecting block, a pressure sensor is installed on the lower surface of the connecting block, a pressure block is installed on the lower surface of the pressure sensor, a box body is installed on one side of the upper surface of the base plate, a light-emitting diode is installed through the upper surface of the box body, a DC power supply is installed on the left side of the inner cavity of the box body, a single-chip microcomputer is installed on the right side of the inner cavity of the box body, the single-chip microcomputer and the push rod are connected by a wire, and the single-chip microcomputer and the push rod are connected by a wire. The light-emitting diodes are connected by wires, the single-chip microcomputer and the transmission structure are connected by wires, the single-chip microcomputer and the pressure sensor are connected by wires, the DC power supply and the light-emitting diodes are connected by wires, mounting blocks are installed on both sides of the left and right upper surfaces of the base plate, a pad is installed on the top of the mounting block, a deformation amplitude adjustment device is installed in the middle of the upper surface of the base plate, a limiting structure is movably installed on the upper surface of the base plate, racks are installed on both sides of the left and right sides of the connecting block, a gear is movably installed on the inner side of the U-shaped fixed plate, the rack is meshed with the gear, a swing rod is installed on one side of the gear surface, a limiting hole is provided on the surface of the swing rod, the limiting hole and the swing rod are designed as an integrated whole, and a resistance structure is installed on one side of the upper surface of the U-shaped limiting plate, and the resistance structure passes through the limiting hole.

[0007] Preferably, a groove is provided on the lower surface of one side of the U-shaped limiting plate, a metal sensor is installed inside the groove, and the metal sensor is connected to the single-chip microcomputer through a wire.

[0008] Preferably, the pad on the left is made of copper, and the pad on the left is connected to the DC power supply via a wire.

[0009] Preferably, the deformation amplitude adjusting device includes a threaded rod installed in the middle of the upper surface of the base plate, the outer side of the threaded rod is threadedly connected to a threaded barrel, a fixed block is installed on the top of the threaded barrel, an electrode sheet is movably installed on the upper surface of the fixed block, the light-emitting diode and the electrode sheet are connected by a wire, and the deformation amplitude adjusting device also includes two telescopic rods installed on the upper surface of the base plate, and the upper ends of the telescopic rods are installed on the lower surface of the electrode sheet.

[0010] Preferably, the electrode sheet is made of copper.

[0011] Preferably, the limiting structure includes two L-shaped limiting plates movably installed on the left and right sides of the upper surface of the base plate, a connecting rod is connected between the two L-shaped limiting plates, a spring is installed on one side of the L-shaped limiting plate, the end of the spring away from the L-shaped limiting plate is installed on one side of the upper surface of the base plate, and a U-shaped pressure plate is installed on the top of the two L-shaped limiting plates on the same side.

[0012] Preferably, two stoppers are installed on both left and right sides of the upper surface of the bottom plate.

[0013] Preferably, the interference structure includes a support column installed on one side of the upper surface of the U-shaped limit plate, the support column is provided with a movable groove inside the support column, the movable groove and the support column are designed as an integral whole, a first limit groove is provided on one side of the movable groove, the first limit groove and the support column are designed as an integral whole, a second limit groove is provided on one side of the movable groove, and the second limit groove and the support column are designed as an integral whole, a lifting block is movably installed inside the movable groove, a limiting block is installed on one side of the lifting block, the limiting block and the lifting block are designed as an integral whole, the limiting block passes through the limiting hole, and a plug rod is movably installed on the lower part of the support column, and a support rod is movably installed on one side of the upper surface of the plug rod, the support rod one end of the support rod away from the plug rod is movably installed on one side of the lifting block, the support rod is located inside the second limiting groove, and a push plate is installed at one end of the plug rod, and the push plate and the plug rod are designed as an integral whole.

[0014] The invention proposes a construction steel strength detection device which is convenient for switching detection positions. The beneficial effect is that when the invention performs detection work, the steel whose strength needs to be detected passes through the position between the transmission structure and the U-shaped limit plate, and passes through the position between the two L-shaped limit plates to be placed on the upper surfaces of the two pads. Its position is in a basically fixed state. By turning on the switch of the push rod, the connecting block is driven to move downward. At this time, the connecting block can drive the rack to move downward. The rack is meshed with the gear, which can make the gear rotate, drive the swing rod to rotate, thereby driving the limit block to move upward, and the lifting block slides upward, thereby driving the support rod to rotate, and driving the insertion rod to move, so that the push plate pushes the U-shaped pressing piece, thereby driving the L The L-shaped limit plate rotates as a whole, so that the L-shaped limit plate moves to the upper surface of the pad. At this time, the U-shaped pressure piece presses the steel to be tested, limits and fixes the steel, and presses the steel during the movement of the connecting block. The operation is convenient, and the steel is released during the resetting process of the connecting block. The degree of automation is high, which is convenient for subsequent strength testing of different positions of the steel. When the connecting block moves downward, the connecting block drives the pressure sensor to move downward, thereby causing the pressure block to move downward. The pressure block has a downward pressing force on the steel to be tested, and the pressing force will be transmitted from the pressure sensor to the single-chip microcomputer. When the steel has a certain deformation, the steel will contact the upper surface of the electrode sheet. At this time, there is contact between the pad, DC power supply, light-emitting diode, electrode sheet and steel. A loop is formed, at which time the light-emitting diode lights up, and the single-chip computer receives the information that the light-emitting diode is turned on, records the value of the pressure sensor at this time, and obtains the force required for the steel to produce this amplitude deformation, thereby completing the detection of the steel strength. This method has a low cost, and does not rely on artificial observation of the steel deformation amount, but rather determines whether the steel has produced a certain deformation amount by whether the circuit is turned on or not. The response is timely and rapid, and the detection result is relatively accurate. After the single-chip computer records the result, the single-chip computer controls the output end of the push rod to contract, driving the connecting block and the pressure sensor to reset. At this time, the rack resets the push plate by controlling the gear. At this time, the L-shaped limit plate is bounced up, and the U-shaped pressure plate no longer presses the steel, and then the transmission structure is started, with The steel is moved left and right. It is worth noting that in order to prevent the steel to be tested from moving too much and causing instability during detection, a metal sensor is used to detect its position. When the steel at one end is about to leave the upper surface of the transmission structure, the metal sensor cannot detect the metal signal and can transmit the signal to the single-chip microcomputer. The single-chip microcomputer controls the switch of the push rod and cannot open it, thereby protecting the device. In addition, the device can drive the threaded barrel to rotate by rotating the fixed block, so that the threaded barrel moves up or down, thereby adjusting the height of the electrode sheet. Changing the height of the electrode sheet can change the deformation of the steel when the light-emitting diode is turned on, and then the force exerted on the steel under different deformation amounts is obtained, which can perform a more comprehensive detection and evaluation of the steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A schematic diagram of the cross-sectional structure of a front view of a construction steel strength detection device that is convenient for switching detection positions proposed by the present invention;

[0016] Figure 2 A schematic diagram of the top view of a construction steel strength detection device proposed by the present invention that facilitates switching of detection positions;

[0017] Figure 3 A schematic diagram of the side structure of an L-shaped limit plate of a building steel strength detection device that is convenient for switching detection positions proposed by the present invention;

[0018] Figure 4 A schematic diagram of the inner cavity structure of a box body of a building steel strength testing device that is convenient for switching the testing position, as proposed by the present invention;

[0019] Figure 5 A schematic structural diagram of a cross-sectional view of a support column of a building steel strength detection device that facilitates switching of detection positions proposed by the present invention;

[0020] Figure 6 A schematic diagram of the structure of the light emitting diode circuit connection mode of a building steel strength detection device that is convenient for switching the detection position proposed by the present invention;

[0021] Figure 7 A schematic diagram of the structure of a single-chip circuit connection mode of a building steel strength detection device that is convenient for switching detection positions proposed by the present invention;

[0022] Figure 8 This is a structural schematic diagram of a construction steel strength detection device A proposed by the present invention that is convenient for switching detection positions;

[0023] Fig. 9 This is a schematic structural diagram of a construction steel strength detection device B proposed by the present invention that is convenient for switching detection positions.

[0024] In the figure: base plate 1, transmission structure 2, U-shaped limit plate 3, groove 4, metal sensor 5, U-shaped fixing plate 6, push rod 7, connecting block 8, pressure sensor 9, pressing block 10, box body 11, light emitting diode 12, DC power supply 13, single chip microcomputer 14, mounting block 15, pad 16, threaded rod 17, threaded cylinder 18, fixing block 19, electrode sheet 20, telescopic rod 21, L-shaped limit plate 22, spring 23, connecting rod 24, U-shaped pressure piece 25, block 26, rack 27, gear 28, swing rod 29, limit hole 30, support column 31, movable groove 32, first limit groove 33, second limit groove 34, lifting block 35, limit block 36, plug rod 37, support rod 38, push plate 39. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figure 1-9 A construction steel strength detection device that is convenient for detecting position switching includes a base plate 1, a transmission structure 2 is installed on both sides of the upper surface of the base plate 1, a U-shaped limit plate 3 is installed on both sides of the upper surface of the base plate 1, a groove 4 is opened on the lower surface of one side of the U-shaped limit plate 3, and a metal sensor 5 is installed inside the groove 4. The metal sensor 5 is connected to a single-chip computer 14 through a wire, and its position is detected by the metal sensor 5. When the steel at one end is about to leave the upper surface of the transmission structure 2, the metal sensor 5 cannot detect the metal signal and can transmit the signal to the single-chip computer 14. The single-chip computer 14 controls the switch of the push rod 7 that cannot be opened, thereby protecting the device to prevent the steel to be tested from moving too much, causing it to be unstable during detection.

[0027] The U-shaped limiting plate 3 is located above the transmission structure 2, a U-shaped fixing plate 6 is installed in the middle of the upper surface of the bottom plate 1, a push rod 7 is installed in the middle of the upper surface of the U-shaped fixing plate 6, the output end of the push rod 7 movably penetrates the U-shaped fixing plate 6 and is installed with a connecting block 8, a pressure sensor 9 is installed on the lower surface of the connecting block 8, and a pressing block 10 is installed on the lower surface of the pressure sensor 9, a box body 11 is installed on one side of the upper surface of the bottom plate 1, a light-emitting diode 12 is installed through the upper surface of the box body 11, a DC power supply 13 is installed on the left side of the inner cavity of the box body 11, and a single-chip microcomputer 14 is installed on the right side of the inner cavity of the box body 11, the single-chip microcomputer 14 and the push rod 7 are connected by wires, and the single-chip microcomputer 14 is connected to the light-emitting diode The tubes 12 are connected by wires, the single-chip computer 14 and the transmission structure 2 are connected by wires, the single-chip computer 14 and the pressure sensor 9 are connected by wires, the DC power supply 13 and the light-emitting diode 12 are connected by wires, and mounting blocks 15 are installed on both sides of the left and right sides of the upper surface of the bottom plate 1, and a pad 16 is installed on the top of the mounting block 15. The left pad 16 is made of copper, and the left pad 16 is connected to the DC power supply 13 by a wire, so that when the deformation of the steel reaches a certain degree, a loop is formed between the pad 16, the DC power supply 13, the light-emitting diode 12, the electrode sheet 20 and the steel, and the light-emitting diode 12 emits light at this time.

[0028] A deformation amplitude adjustment device is installed in the middle of the upper surface of the base plate 1, and the deformation amplitude adjustment device includes a threaded rod 17 installed in the middle of the upper surface of the base plate 1, and a threaded barrel 18 is threadedly connected to the outer side of the threaded rod 17, and a fixed block 19 is installed on the top of the threaded barrel 18. An electrode sheet 20 is movably installed on the upper surface of the fixed block 19, and the electrode sheet 20 is made of copper. The light-emitting diode 12 and the electrode sheet 20 are connected by a wire. The deformation amplitude adjustment device also includes two telescopic rods 21 installed on the upper surface of the base plate 1, and the upper end of the telescopic rod 21 is installed on the lower surface of the electrode sheet 20. The threaded barrel 18 is driven to rotate by rotating the fixed block 19, so that the threaded barrel 18 moves upward or downward, thereby adjusting the height of the electrode sheet 20. Changing the height of the electrode sheet 20 can change the deformation amount of the steel when the light-emitting diode 12 is turned on, and then the force exerted on the steel under different deformation amounts is obtained, which can perform a more comprehensive detection and evaluation of the steel.

[0029] A limiting structure is movably installed on the upper surface of the base plate 1, and the limiting structure includes two L-shaped limiting plates 22 movably installed on the left and right sides of the upper surface of the base plate 1, a connecting rod 24 is connected between the two L-shaped limiting plates 22, a spring 23 is installed on one side of the L-shaped limiting plate 22, and one end of the spring 23 away from the L-shaped limiting plate 22 is installed on one side of the upper surface of the base plate 1, and a U-shaped pressing piece 25 is installed on the top of the two L-shaped limiting plates 22 on the same side. The L-shaped limiting plates 22 rotate as a whole, so that the L-shaped limiting plates 22 move to the upper surface of the pad 16. At this time, the U-shaped pressing piece 25 presses the steel to be tested, thereby limiting and fixing the steel.

[0030] Two stoppers 26 are installed on both sides of the upper surface of the bottom plate 1 , and the stoppers can prevent the L-shaped limit plate 22 from rotating too much when resetting and hitting the U-shaped limit plate 3 .

[0031] Racks 27 are installed on both sides of the connecting block 8, and a gear 28 is movably installed on the inner side of the U-shaped fixing plate 6. The rack 27 is meshed with the gear 28. A swing rod 29 is installed on one side of the surface of the gear 28. A limit hole 30 is provided on the surface of the swing rod 29. The limit hole 30 and the swing rod 29 are designed as an integrated whole. A resistance structure is installed on one side of the upper surface of the U-shaped limit plate 3. The resistance structure includes a support column 31 installed on one side of the upper surface of the U-shaped limit plate 3. A movable groove 32 is provided inside the support column 31. The movable groove 32 and the support column The movable groove 32 is provided with a first limiting groove 33 on one side, and the first limiting groove 33 and the support column 31 are designed as a whole. The movable groove 32 is provided with a second limiting groove 34 on one side, and the second limiting groove 34 and the support column 31 are designed as a whole. A lifting block 35 is movably installed inside the movable groove 32, and a limiting block 36 is installed on one side of the lifting block 35. The limiting block 36 and the lifting block 35 are designed as a whole. The limiting block 36 passes through the limiting hole 30, and a plug rod 37 is movably installed at the lower part of the support column 31. The plug rod 37 A support rod 38 is movably mounted on one side of the upper surface of 7, and one end of the support rod 38 away from the insertion rod 37 is movably mounted on one side of the lifting block 35. The support rod 38 is located inside the second limiting groove 34, and a push plate 39 is mounted on one end of the insertion rod 37. The push plate 39 and the insertion rod 37 are designed as an integrated whole. The interference structure passes through the limiting hole 30. The steel material to be tested for strength passes through the position between the transmission structure 2 and the U-shaped limiting plate 3, and passes through the position between the two L-shaped limiting plates 22, so that it is placed on the upper surface of the two pads 16, and its position is In a basically fixed state, by turning on the switch of the push rod 7, the connecting block 8 is driven to move downward. At this time, the connecting block 8 can drive the rack 27 to move downward, and the rack 27 is engaged with the gear 28, which can make the gear 28 rotate, drive the swing rod 29 to rotate, thereby driving the limit block 36 to move upward, and the lifting block 35 slides upward, thereby driving the support rod 38 to rotate, and driving the insertion rod 37 to move, so that the push plate 39 pushes the U-shaped pressure plate 25, and then drives the L-shaped limit plate 22 to rotate as a whole, which is convenient for the subsequent fixation of the steel.

[0032] Working principle: When the present invention is performing the detection work, the steel material whose strength needs to be detected passes through the position between the transmission structure 2 and the U-shaped limit plate 3, and passes through the position between the two L-shaped limit plates 22, so that it is placed on the upper surface of the two pads 16, and its position is in a basically fixed state. By turning on the switch of the push rod 7, the connecting block 8 is driven to move downward. At this time, the connecting block 8 can drive the rack 27 to move downward, and the rack 27 is engaged with the gear 28, which can make the gear 28 rotate, drive the swing rod 29 to rotate, thereby driving the limit block 36 to move upward, and the lifting block 35 slides upward, thereby driving the support rod 38 to rotate, and driving the insertion rod 37 to move, so that the push plate 39 pushes the U-shaped pressure piece 25, thereby driving the L-shaped limit The plate 22 rotates as a whole, so that the L-shaped limit plate 22 moves to the upper surface of the pad 16. At this time, the U-shaped pressure piece 25 presses the steel to be tested, limits and fixes the steel, and presses the steel during the movement of the connecting block 8. The operation is convenient, and the steel is released during the resetting process of the connecting block 8. The degree of automation is high. When the connecting block 8 moves downward, the connecting block 8 drives the pressure sensor 9 to move downward, so that the pressure block 10 moves downward. The pressure block 10 has a downward pressing force on the steel to be tested, and the pressing force will be transmitted from the pressure sensor 9 to the single-chip microcomputer 14. When the steel has a certain deformation, the steel will contact the upper surface of the electrode sheet 20. At this time, the pad 16, the DC power supply 13, the light-emitting diode 12, the electrode sheet 20 and the steel A loop is formed between the steel materials. At this time, the light-emitting diode 12 emits light, and the single-chip computer 14 receives the information that the light-emitting diode 12 is turned on, records the value of the pressure sensor 9 at this time, and obtains the force required for the steel material to produce this amplitude deformation, thereby completing the detection of the strength of the steel material. After the single-chip computer 14 records the result, the single-chip computer 14 controls the output end of the push rod 7 to contract, driving the connecting block 8 and the pressure sensor 9 to reset. At this time, the rack 27 resets the push plate 39 by controlling the gear 28. At this time, the L-shaped limit plate 22 is bounced up, and the U-shaped pressure piece 25 no longer presses the steel material. Subsequently, the transmission structure 2 is started to drive the steel material to move left and right. It is worth noting that in order to prevent the steel material to be tested from moving too much and causing it to be unstable during detection, The metal sensor 5 is used to detect its position. When the steel at one end is about to leave the upper surface of the transmission structure 2, the metal sensor 5 cannot detect the metal signal and can transmit the signal to the single-chip microcomputer 14. The single-chip microcomputer 14 controls the switch of the push rod 7 that cannot be opened, thereby protecting the device. In addition, the device can drive the threaded barrel 18 to rotate by rotating the fixed block 19, so that the threaded barrel 18 moves upward or downward, thereby adjusting the height of the electrode sheet 20. Changing the height of the electrode sheet 20 can change the deformation of the steel when the light-emitting diode 12 is turned on, and then the force exerted on the steel under different deformation amounts is obtained. The present invention has a reasonable design and a clever structure. Through the mutual cooperation between the structures, it has good market competitiveness and is worth recommending.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A construction steel strength detection device that is convenient for switching detection positions, comprising a bottom plate (1), characterized in that: The transmission structure (2) is installed on both the left and right sides of the upper surface of the bottom plate (1), and U-shaped limit plates (3) are installed on both the left and right sides of the upper surface of the bottom plate (1), and the U-shaped limit plates (3) are located above the transmission structure (2). A U-shaped fixing plate (6) is installed in the middle of the upper surface of the bottom plate (1), and a push rod (7) is installed in the middle of the upper surface of the U-shaped fixing plate (6). The output end of the push rod (7) movably passes through the U-shaped fixing plate (6) and is installed with a connecting block (8), and a pressure sensor is installed on the lower surface of the connecting block (8). (9), a pressure block (10) is installed on the lower surface of the pressure sensor (9), a box body (11) is installed on one side of the upper surface of the bottom plate (1), a light-emitting diode (12) is installed through the upper surface of the box body (11), a DC power supply (13) is installed on the left side of the inner cavity of the box body (11), a single-chip computer (14) is installed on the right side of the inner cavity of the box body (11), the single-chip computer (14) and the push rod (7) are connected by a wire, and the single-chip computer (14) and the light-emitting diode (12) are connected by a wire, The single-chip computer (14) and the transmission structure (2) are connected via a wire, the single-chip computer (14) and the pressure sensor (9) are connected via a wire, and the DC power supply (13) and the light-emitting diode (12) are connected via a wire. Mounting blocks (15) are installed on both left and right sides of the upper surface of the base plate (1), and a pad (16) is installed on the top of the mounting block (15). A deformation amplitude adjustment device is installed in the middle of the upper surface of the base plate (1). A limiting structure is movably installed on the upper surface of the base plate (1). The connecting block (8) is provided with a rack (27) on both the left and right sides, a gear (28) is movably provided on the inner side of the U-shaped fixing plate (6), the rack (27) and the gear (28) are meshed with each other, a swing rod (29) is provided on one side of the surface of the gear (28), a limiting hole (30) is provided on the surface of the swing rod (29), the limiting hole (30) and the swing rod (29) are integrally designed, and a resistance structure is provided on one side of the upper surface of the U-shaped limiting plate (3), the resistance structure passes through the limiting hole (30); A groove (4) is provided on the lower surface of one side of the U-shaped limiting plate (3), a metal sensor (5) is installed inside the groove (4), and the metal sensor (5) is connected to the single chip computer (14) via a wire; The pad (16) on the left side is made of copper, and the pad (16) on the left side is connected to the DC power supply (13) via a wire; The deformation amplitude adjustment device comprises a threaded rod (17) mounted on the middle part of the upper surface of the base plate (1), the outer side of the threaded rod (17) is threadedly connected to a threaded cylinder (18), a fixed block (19) is mounted on the top of the threaded cylinder (18), an electrode sheet (20) is movably mounted on the upper surface of the fixed block (19), the light-emitting diode (12) and the electrode sheet (20) are connected via a wire, and the deformation amplitude adjustment device also comprises two telescopic rods (21) mounted on the upper surface of the base plate (1), the upper ends of the telescopic rods (21) are mounted on the lower surface of the electrode sheet (20); The limiting structure comprises L-shaped limiting plates (22) movably mounted on the left and right sides of the upper surface of the bottom plate (1); a connecting rod (24) is connected between the two L-shaped limiting plates (22) on the same side; a spring (23) is mounted on one side of the L-shaped limiting plate (22); an end of the spring (23) away from the L-shaped limiting plate (22) is mounted on one side of the upper surface of the bottom plate (1); and a U-shaped pressing plate (25) is mounted on the top of the two L-shaped limiting plates (22) on the same side; The interference structure comprises a support column (31) installed on one side of the upper surface of the U-shaped limiting plate (3); a movable groove (32) is provided inside the support column (31); the movable groove (32) and the support column (31) are designed as an integral whole; a first limiting groove (33) is provided on one side of the movable groove (32); the first limiting groove (33) and the support column (31) are designed as an integral whole; a second limiting groove (34) is provided on one side of the movable groove (32); the second limiting groove (34) and the support column (31) are designed as an integral whole; a lifting block (35) is movably installed inside the movable groove (32); the lifting block (35) A limiting block (36) is installed on one side of the support column (35), the limiting block (36) and the lifting block (35) are of an integrated design, the limiting block (36) passes through the limiting hole (30), a plug rod (37) is movably installed on the lower part of the support column (31), a support rod (38) is movably installed on one side of the upper surface of the plug rod (37), one end of the support rod (38) away from the plug rod (37) is movably installed on one side of the lifting block (35), the support rod (38) is located inside the second limiting groove (34), a push plate (39) is installed on one end of the plug rod (37), and the push plate (39) and the plug rod (37) are of an integrated design; When the inspection is performed, the steel material whose strength needs to be inspected is passed through the position between the transmission structure (2) and the U-shaped limit plate (3), and through the position between the two L-shaped limit plates (22), so that it is placed on the upper surface of the two pads (16), and its position is in a basically fixed state. By turning on the switch of the push rod (7), the connecting block (8) is driven to move downward. At this time, the connecting block (8) can drive the rack (27) to move downward, and the rack (27) is meshed with the gear (28), so that the gear (28) can be moved downward. The wheel (28) rotates, driving the swing rod (29) to rotate, thereby driving the limit block (36) to move upward, and the lifting block (35) slides upward, thereby driving the support rod (38) to rotate, and driving the insertion rod (37) to move, so that the push plate (39) pushes the U-shaped pressing plate (25), thereby driving the L-shaped limiting plate (22) to rotate as a whole, so that the L-shaped limiting plate (22) moves to the upper surface of the pad (16), and at this time, the U-shaped pressing plate (25) presses the steel to be tested, and limits and fixes the steel; During the movement of the connecting block (8), the steel is pressed, and during the reset of the connecting block (8), the steel is released. While the connecting block (8) moves downward, the connecting block (8) drives the pressure sensor (9) to move downward, thereby causing the pressing block (10) to move downward. The pressing block (10) exerts a downward pressing force on the steel to be tested, and the pressing force is transmitted from the pressure sensor (9) to the single-chip microcomputer (14). When the steel has a certain deformation, the steel will contact the upper surface of the electrode sheet (20). At this time, a loop is formed between the pad (16), the DC power supply (13), the light-emitting diode (12), the electrode sheet (20) and the steel. At this time, the light-emitting diode (12) emits light, and the single-chip microcomputer (14) receives the information that the light-emitting diode (12) is turned on, records the value of the pressure sensor (9) at this time, and obtains the force required for the steel to produce this amplitude deformation, thereby completing the detection of the strength of the steel; After the single chip computer (14) records the result, the single chip computer (14) controls the output end of the push rod (7) to contract, driving the connection block (8) and the pressure sensor (9) to reset. At this time, the rack (27) controls the gear (28) to reset the push plate (39). At this time, the L-shaped limit plate (22) is bounced up, and the U-shaped pressure piece (25) no longer presses the steel. Then, by starting the transmission structure (2), the steel is driven to move left and right. In order to prevent the steel to be tested from moving too much and causing it to be unstable during the test, its position is detected by the metal sensor (5). When one end of the steel is When the metal sensor (5) is about to detach from the upper surface of the transmission structure (2), the metal sensor (5) cannot detect the metal signal and transmits the signal to the single chip computer (14). The single chip computer (14) controls the switch of the push rod (7) so that it cannot be turned on, thereby protecting the device. In addition, the device drives the threaded barrel (18) to rotate by rotating the fixed block (19), so that the threaded barrel (18) moves upward or downward, thereby adjusting the height of the electrode sheet (20). Changing the height of the electrode sheet (20) changes the deformation of the steel when the light-emitting diode (12) is turned on, thereby obtaining the force exerted on the steel under different deformation amounts.

2. The construction steel strength detection device that is convenient for switching detection positions according to claim 1 is characterized in that: The electrode sheet (20) is made of copper.

3. The construction steel strength detection device that is convenient for switching detection positions according to claim 1 is characterized in that: Two stoppers (26) are installed on both left and right sides of the upper surface of the bottom plate (1).

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