A prestressed steel strand detection device

Abstract

The utility model discloses a kind of prestressed steel strand detection equipment, it is related to pressure test technical field.A kind of prestressed steel strand detection equipment, including fixed base, the top of fixed base is fixedly connected with support plate, two stranded wire clamping plates are relatively moved by the rotation of bidirectional screw rod driven by stepper motor, cooperate the tooth of stranded wire placing groove inner wall and the tooth slot on stranded wire clamping plate, prestressed steel strand can be firmly clamped, simultaneously, by the multiple bending of steel strand in stranded wire placing groove, so as to be able to scatter pulling force on stranded wire fixing plate, its bending part can be better embedded in stranded wire placing groove, form mechanical biting cooperation, this biting cooperation can increase the anchoring force between steel strand and stranded wire fixing plate, so that steel strand can more effectively transmit pulling force, effectively prevent steel strand from sliding or falling off in detection process, guarantee the accuracy and reliability of detection.

Description

Technical Field

[0001] This utility model relates to the field of pressure testing technology, and in particular to a testing device for prestressed steel strands. Background Technology

[0002] In the field of prestressed engineering, prestressed steel strands, with their high strength, good flexibility, and excellent fatigue resistance, have become a key material for constructing prestressed structures and are widely used in many large-scale projects such as bridges, buildings, and water conservancy. Chinese utility model patent, authorized announcement number "CN221199290U", discloses a prestressed steel strand testing device. This device, through the arrangement of a fixing block, through grooves, a tightening block, and anti-slip teeth, facilitates the fixing of the prestressed steel strand body. In use, the two ends of the prestressed steel strand body are passed through the through grooves on both sides. Then, the prestressed steel strand body is tightened, and the handle is turned to the right, causing the screw to move inward on the surface of the fixing block. This, in turn, causes the tightening block to move inward on the inner surface of the through groove, clamping the prestressed steel strand body and fixing both ends, thus achieving the purpose of quickly and easily fixing the steel strand.

[0003] When the above technical solution is used, although anti-slip teeth are added to the surface of the clamp in an attempt to prevent the steel strand from slipping by increasing friction, and although these measures have improved the friction between the clamp and the steel strand to a certain extent and reduced the possibility of slippage, since the steel strand is directly clamped and fixed horizontally, the rough texture of the clamp surface may be worn or corroded in high humidity or corrosive environments, resulting in a decrease in friction and the slippage problem may still occur, thus affecting the reliability of clamping. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a prestressed steel strand testing device. This device can solve the problem that although anti-slip teeth are added to the surface of the clamp to try to prevent the steel strand from slipping by increasing friction, and although these measures improve the friction between the clamp and the steel strand to a certain extent and reduce the possibility of slippage, the rough texture of the clamp surface may be worn or corroded in high humidity or corrosive environments because the steel strand is directly clamped and fixed horizontally. This leads to a decrease in friction and the slippage problem may still occur, thus affecting the reliability of clamping.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a prestressed steel strand testing device, comprising: A fixed base, with a support plate fixedly connected to the top of the fixed base; The stranded wire anti-derailment structure is located on the support plate; The anti-derailment structure for the stranded wire includes a second electric telescopic rod and a stranded wire fixing plate. The second electric telescopic rod is installed on one side of the support plate. The telescopic end of the second electric telescopic rod slides into the interior of the support plate and is fixedly connected to the stranded wire fixing plate. The top of the stranded wire fixing plate is provided with a stranded wire placement groove. The inner wall of the stranded wire placement groove is provided with two storage grooves and a moving groove. Both storage grooves are connected to the interior of the moving groove. The inner wall of the stranded wire placement groove is fixedly connected with multiple teeth.

[0006] Preferably, the stranded wire anti-derailment structure further includes a stepper motor, a bidirectional threaded rod, and two stranded wire clamping plates. The bidirectional threaded rod is rotatably connected inside the moving groove. The stepper motor is installed on the side of the stranded wire fixing plate near the electric telescopic rod. The output end of the stepper motor rotatably extends into the moving groove and is fixedly connected to the bidirectional threaded rod. Both stranded wire clamping plates are threaded onto the outer surface of the bidirectional threaded rod. Both stranded wire clamping plates are slidably connected to the inside of the moving groove. The opposite surfaces of the two stranded wire clamping plates are respectively provided with multiple toothed grooves.

[0007] Preferably, there are two stranded wire anti-derailment structures, which are symmetrically arranged on the support plate.

[0008] Preferably, two reinforcing rods are fixedly connected to the side of the stranded wire fixing plate near the electric telescopic rod two, and the ends of the two reinforcing rods away from the stranded wire fixing plate slide to the outside of the support plate.

[0009] Preferably, two electric telescopic rods are fixedly installed on the inner top wall of the support plate, and pressure sensors are fixedly connected to the telescopic ends of the two electric telescopic rods. Pressure plates are fixedly connected to the bottom of the pressure sensors.

[0010] Preferably, a control box is installed on one side of the support plate.

[0011] Preferably, the stranded wire clamping plate has a "T" shaped structure.

[0012] Preferably, a limiting groove is formed inside the strand placement groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This prestressed steel strand testing equipment uses a stepper motor to drive a bidirectional threaded rod to rotate, causing two strand clamping plates to move relative to each other. This, combined with the teeth on the inner wall of the strand placement groove and the grooves on the strand clamping plates, securely holds the prestressed steel strand. Simultaneously, through multiple bends of the steel strand within the placement groove, the tensile force is distributed across the strand fixing plate. The bent portions better embed into the placement groove, forming a mechanical interlocking effect. This interlocking effect increases the anchoring force between the steel strand and the strand fixing plate, enabling the steel strand to more effectively transmit tension and preventing slippage or detachment during testing, thus ensuring the accuracy and reliability of the testing. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the stranded wire fixing plate of this utility model; Figure 3 This is a schematic diagram of the pressure plate structure of this utility model; Figure 4 This is a schematic diagram of the stranded wire clamping plate structure of this utility model; Figure 5 This is a schematic diagram of the bidirectional threaded rod structure of this utility model.

[0015] Reference numerals in the attached diagram: 1. Fixed base; 2. Support plate; 3. Electric telescopic rod one; 4. Pressure sensor; 5. Wire clamping plate; 6. Stranded wire fixing plate; 7. Electric telescopic rod two; 8. Reinforcing rod; 9. Stepper motor; 10. Stranded wire placement slot; 11. Stranded wire clamping plate; 12. Bidirectional threaded rod; 13. Gear groove; 14. Tooth; 15. Moving slot; 16. Storage slot; 17. Limiting slot; 18. Control box. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Fixed base 1: As the basic support component of the entire testing device, it provides a stable and flat mounting surface for the upper support plate 2 and other structures, ensuring that the entire device remains stable during the testing process and avoiding the impact of shaking or displacement on the accuracy of the test results.

[0021] Support plate 2: "U" shaped structure, providing installation positions for components such as electric telescopic pole 1 3 and electric telescopic pole 2 7; two stranded wire anti-derailment structures are symmetrically arranged on it, facilitating simultaneous operation of two steel strands; reinforcing rod 8 slides on it, enhancing the stability of the stranded wire fixing plate 6.

[0022] Electric telescopic pole 3: Installed on the inner top wall of support plate 2, its telescopic end drives pressure sensor 4 and pressure plate 5 to move downward, thereby applying pressure to the steel strand and completing the performance test of the steel strand in conjunction with pressure sensor 4.

[0023] Pressure sensor 4: Fixed between the telescopic end of the electric telescopic rod 3 and the pressure plate 5, it detects the pressure applied to the steel strand by the pressure plate 5 in real time and transmits the data to the control box 18, providing key data for analyzing the performance of the steel strand.

[0024] Pressure plate 5: Connected to the bottom of pressure sensor 4, it presses against the fixed steel strand under the action of electric telescopic rod 3, and evenly transmits the pressure to the steel strand to assist in the performance test.

[0025] Strand fixing plate 6: A strand placement groove 10 is opened at the top for placing steel strands; a stepper motor 9, a bidirectional threaded rod 12 and other components are installed on it, which work with the strand clamping plate 11 to clamp the steel strands; an electric telescopic rod 7 and a reinforcing rod 8 are connected to one side.

[0026] Electric telescopic pole 27: Installed on one side of support plate 2, the telescopic end slides into the interior of support plate 2 and is fixedly connected to stranded wire fixing plate 6, driving stranded wire fixing plate 6 to move and adjust the tension of steel strand.

[0027] Reinforcing rod 8: One end is fixed to the side of the stranded wire fixing plate 6 near the electric telescopic rod 7, and the other end slides to the outside of the support plate 2. It plays a role in strengthening and stabilizing the stranded wire fixing plate 6 when it moves, preventing it from shaking.

[0028] Stepper motor 9: Installed on the side of the stranded wire fixing plate 6 near the electric telescopic rod 7, the output end rotates and extends into the moving groove 15 and is fixedly connected to the bidirectional threaded rod 12, providing power for the rotation of the bidirectional threaded rod 12.

[0029] Strand placement groove 10: It is opened on the top of the strand fixing plate 6 and is used to place steel strands; the inner wall has teeth 14, storage groove 16, moving groove 15 and limiting groove 17 to help complete the fixing of steel strands.

[0030] The strand clamping plate 11 has a "T" shaped structure, is threaded onto the outer surface of the bidirectional threaded rod 12 and is slidably connected to the inside of the moving groove 15, and has multiple toothed grooves 13 on the opposite side to cooperate with the teeth 14 to clamp the steel strand.

[0031] The bidirectional threaded rod 12 is rotatably connected inside the moving groove 15. The stepper motor 9 drives it to rotate, causing the two strand clamping plates 11 to move in opposite directions along the moving groove 15, thereby achieving steel strand clamping.

[0032] Gutter 13: It is formed on the opposite side of the strand clamping plate 11 and cooperates with the teeth 14 on the inner wall of the strand placement groove 10 to increase the friction with the steel strand and make the clamping more secure.

[0033] Tooth 14: Fixedly connected to the inner wall of the strand placement groove 10, and cooperates with the tooth groove 13 on the strand clamping plate 11 to enhance the clamping effect on the steel strand and prevent the steel strand from slipping.

[0034] Moving groove 15: It is opened on the inner wall of the strand placement groove 10 and communicates with the inside of the storage groove 16. The bidirectional threaded rod 12 is rotatably connected therein, and the strand clamping plate 11 slides inside it.

[0035] Storage slot 16: It is formed on the inner wall of the stranded wire placement slot 10 and communicates with the interior of the moving slot 15. It may be used to store the part of the structure or cable that is not used during the movement of the stranded wire clamping plate 11.

[0036] Limiting groove 17: It is opened inside the strand placement groove 10, where the steel strand is placed to prevent the steel strand from falling off during the inspection process, so that the steel strand can be held in place by the two strand clamping plates 11 and fit against the inner wall of the strand placement groove 10.

[0037] Control box 18: Installed on one side of support plate 2, it receives and analyzes the data transmitted by pressure sensor 4 to realize the detection and control of prestressed steel strand performance.

[0038] Example 1: like Figure 1-5 As shown, the steel strand is first placed in the strand placement groove 10 on the top of the strand fixing plate 6. The stepper motor 9 is started, and its output end rotates and extends into the moving groove 15, driving the bidirectional threaded rod 12 to rotate. Since the two strand clamping plates 11 are threaded onto the outer surface of the bidirectional threaded rod 12 and slidably connected to the inside of the moving groove 15, when the bidirectional threaded rod 12 rotates, the two strand clamping plates 11 will move in opposite directions along the moving groove 15. The strand clamping plates 11 have a "T" shaped structure, and the multiple toothed grooves 13 on their opposite sides will cooperate with the multiple teeth 14 on the inner wall of the strand placement groove 10, tightly clamping the steel strand in the strand placement groove 10 to prevent the steel strand from falling off during the testing process. This allows the steel strand to adhere to the inner wall of the strand placement groove 10 under the clamping of the two strand clamping plates 11, reducing the horizontal tension of the steel strand under multiple bends.

[0039] Example 2: like Figure 5 As shown, the limiting groove 17 can provide a precise placement position for the steel strand. When the steel strand is installed on the equipment, it is embedded in the limiting groove 17 to ensure that the steel strand is in the accurate position specified by the design, avoids offset or misalignment, and prevents the steel strand from sliding out of the strand placement groove 10.

[0040] Furthermore, when using this device, the steel strand is first placed in the strand placement groove 10 on the top of the strand fixing plate 6. The stepper motor 9 is started, and its output end rotates and extends into the moving groove 15, driving the bidirectional threaded rod 12 to rotate. Since the two strand clamping plates 11 are threaded onto the outer surface of the bidirectional threaded rod 12 and slidably connected to the inside of the moving groove 15, when the bidirectional threaded rod 12 rotates, the two strand clamping plates 11 will move in opposite directions along the moving groove 15. The strand clamping plates 11 have a "T" shaped structure, and the multiple toothed grooves 13 on their opposite sides will cooperate with the multiple teeth 14 on the inner wall of the strand placement groove 10, tightly clamping the steel strand in the strand placement groove 10. At the same time, the steel strand is placed inside the limiting groove 17 to prevent the steel strand from falling off during the testing process, so that the steel strand can fit against the inner wall of the strand placement groove 10 under the clamping of the two strand clamping plates 11, so that the horizontal tension of the steel strand can be reduced under multiple bends.

[0041] Subsequently, the electric telescopic rod 7 is activated, and its telescopic end slides into the support plate 2 and drives the strand fixing plate 6 to move, so that the steel strand is at a suitable tension. At the same time, the two reinforcing rods 8 on one side of the strand fixing plate 6 slide on the support plate 2 to enhance stability.

[0042] The two electric telescopic rods 3 on the inner top wall of the support plate 2 are activated, and their telescopic ends drive the pressure sensor 4 and the pressure plate 5 to move downward. The pressure plate 5 presses on the fixed steel strand. The pressure sensor 4 detects the pressure applied to the steel strand by the pressure plate 5 in real time and transmits the data to the control box 18. The control box 18 can analyze and process the received data to complete the test of the prestressed steel strand performance.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A testing device for prestressed steel strands, characterized in that, include: A fixed base (1) is fixedly connected to a support plate (2) on its top. The stranded wire anti-detachment structure is located on the support plate (2); The anti-derailment structure for stranded wire includes an electric telescopic rod (7) and a stranded wire fixing plate (6). The electric telescopic rod (7) is installed on one side of the support plate (2). The telescopic end of the electric telescopic rod (7) slides into the interior of the support plate (2) and is fixedly connected to the stranded wire fixing plate (6). A stranded wire placement groove (10) is provided on the top of the stranded wire fixing plate (6). The inner wall of the stranded wire placement groove (10) has two storage grooves (16) and a moving groove (15). Both storage grooves (16) are connected to the interior of the moving groove (15). The inner wall of the stranded wire placement groove (10) is fixedly connected with multiple teeth (14).

2. The prestressed steel strand testing equipment according to claim 1, characterized in that: The strand anti-detachment structure also includes a stepper motor (9), a bidirectional threaded rod (12) and two strand clamping plates (11). The bidirectional threaded rod (12) is rotatably connected inside the moving groove (15). The stepper motor (9) is installed on the side of the strand fixing plate (6) near the electric telescopic rod (7). The output end of the stepper motor (9) rotatably extends into the moving groove (15) and is fixedly connected to the bidirectional threaded rod (12). Among them, the two stranded wire clamping plates (11) are threaded onto the outer surface of the bidirectional threaded rod (12), and the two stranded wire clamping plates (11) are slidably connected to the inside of the moving groove (15). The opposite surfaces of the two stranded wire clamping plates (11) are respectively provided with multiple toothed grooves (13).

3. The prestressed steel strand testing equipment according to claim 1, characterized in that: The number of strand anti-derailment structures is two, and the two strand anti-derailment structures are symmetrically arranged on the support plate (2).

4. The prestressed steel strand testing equipment according to claim 1, characterized in that: Two reinforcing rods (8) are fixedly connected to the side of the stranded wire fixing plate (6) near the electric telescopic rod (7). The ends of the two reinforcing rods (8) away from the stranded wire fixing plate (6) slide to the outside of the support plate (2).

5. The prestressed steel strand testing equipment according to claim 1, characterized in that: Two electric telescopic rods (3) are fixedly installed on the inner top wall of the support plate (2). Pressure sensors (4) are fixedly connected to the telescopic ends of the two electric telescopic rods (3). Pressure plates (5) are fixedly connected to the bottom of the pressure sensors (4).

6. The prestressed steel strand testing equipment according to claim 1, characterized in that: A control box (18) is installed on one side of the support plate (2).

7. The prestressed steel strand testing equipment according to claim 2, characterized in that: The stranded wire clamping plate (11) has a "T" shaped structure.

8. The prestressed steel strand testing equipment according to claim 1, characterized in that: A limiting groove (17) is provided inside the strand placement groove (10).

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