A cable tensioning and monitoring device

Abstract

The utility model belongs to the tensile test technical field of cable, especially relates to a cable tensioning and monitoring device, include: main body frame, the both sides of main body frame all are seted up and opened the opening, are respectively used for passing through the both ends of cable, pressure sensor, set up in one side of main body frame, the one end of cable is as fixed end, passes through corresponding opening and is connected with pressure sensor, the utility model discloses the connection design of main body frame, jacking jack and cable, changed the mode of traditional tension testing machine direct clamping cable. Jacking jack is connected with cable tensioning end through extension screw rod part, when tensioning, force is evenly, stably transmitted to cable along screw rod axial direction, avoids the mutual slip of steel wire in cable such as steel strand, half parallel steel wire bundle because of the unevenness of local clamping force, effectively promotes the success rate of cable tensioning, ensures that the test can be carried out smoothly, avoids the time and resource waste caused by test interruption or failure because of steel wire slip.

Description

Technical Field

[0001] This utility model belongs to the field of cable tensioning test technology, and in particular relates to a cable tensioning and monitoring device. Background Technology

[0002] In engineering tests, cable tensioning is typically performed using a triaxial tensile testing machine. The tensile testing machine applies the initial prestress to the cable by clamping both ends of the cable.

[0003] However, existing triaxial tensile testing machines have the following problems when performing cable tests:

[0004] 1. Due to the special structure of the cable, for cables such as steel strands and semi-parallel steel wire bundles, slippage of the internal steel wires may occur during the tensioning process using a tensile testing machine, which directly leads to the failure of cable tensioning.

[0005] 2. After the cable tensioning is completed, the axial load of the cable is entirely borne by the tensile testing machine. Under the force of long-term operation, the clamping part of the testing machine may slip, resulting in data errors.

[0006] 3. Traditional tensile testing machines can only monitor the axial force of the cable during tensioning, and cannot monitor physical quantities such as cable expansion and contraction and cable head slippage in real time. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned technical problems by providing a cable tensioning and monitoring device.

[0008] In view of this, the present invention provides a cable tensioning and monitoring device, comprising:

[0009] The main frame has openings on both sides for the two ends of the cable to pass through.

[0010] A pressure sensor is installed on one side of the main frame, and one end of the cable serves as a fixed end, passing through the corresponding opening and connecting to the pressure sensor.

[0011] A lifting jack is installed on the main frame. A central screw is vertically and movably connected to the lifting rod of the lifting jack. The central screw extends downward to form an extension screw section. The other end of the cable serves as the tensioning end, passing through a corresponding opening and connecting to the end of the extension screw section. A nut is spirally connected to the upper end of the central screw.

[0012] Preferably, a sleeve is installed on the side of the main frame near the lifting jack, and the sleeve is installed on the outside of the lifting jack.

[0013] Preferably, a first displacement meter is installed on both sides of the main frame, and the two ends of the first displacement meter are respectively connected to the two ends of the side of the main frame to detect whether the main frame is deformed.

[0014] Preferably, a cable displacement gauge is provided in the cable body section, and the two ends of the cable displacement gauge are respectively connected to the two ends of the cable body section to monitor the displacement of the cable body section.

[0015] Preferably, each anchor head of the cable is equipped with a third displacement meter, the two ends of which are connected to the cable body and the corresponding anchor head, respectively, to monitor whether the end of the cable body slips.

[0016] Preferably, the extension screw is fixedly connected to the tensioning end of the cable via a connector.

[0017] Preferably, the main frame is formed by welding four steel pipes arranged in a rectangular shape.

[0018] The beneficial effects of this utility model are:

[0019] 1. By changing the connection design of the main frame, lifting jack and cable, the traditional tensile testing machine directly clamps the cable. During tensioning, the lifting jack pushes the nut, and the extension screw connects to the tensioning end of the cable. The force is transmitted to the cable evenly and stably along the screw axis, avoiding the slippage of the steel wires inside the cable, such as steel strands and semi-parallel steel wire bundles, caused by uneven local clamping force. This effectively improves the success rate of cable tensioning, ensures that the test can be carried out smoothly, and avoids the waste of time and resources caused by the interruption or failure of the test due to steel wire slippage.

[0020] 2. After the cables are tensioned, the main frame of the device bears the axial load of the cables, instead of the tensile testing machine bearing it entirely as in traditional methods. As an independent and stable support structure, the main frame can distribute and bear the load, reducing the stress on the clamping parts of the tensile testing machine. This greatly reduces the risk of slippage of the clamping parts under prolonged stress, thus ensuring the accuracy of data acquisition during the test, avoiding test data errors caused by clamp slippage, and making the test results more realistic and reliable, providing effective data support for subsequent research and analysis.

[0021] 3. The pressure sensor in the device can monitor the axial force of the cable in real time, while the first displacement gauges installed on both sides can monitor the deformation of the main frame. Through indirect correlation analysis, physical quantities such as cable expansion and contraction and cable head slippage can be obtained. This multi-component collaborative monitoring design breaks through the limitation of traditional tensile testing machines that can only monitor axial force, realizing real-time monitoring of multiple key physical quantities during cable testing. This provides more comprehensive and richer data for studying the mechanical properties of cables, helps to deeply analyze the comprehensive performance of cables under stress, and provides a more scientific basis for cable design and application. Attached Figure Description

[0022] Figure 1 This is the front view of this utility model;

[0023] Figure 2 This is an enlarged schematic diagram of the upper part of this utility model.

[0024] The markings in the diagram are as follows:

[0025] 1. Main frame; 2. Sleeve; 3. Connector; 4. Lifting jack; 5. Extension screw section; 6. Third displacement gauge; 7. Pressure sensor; 8. Wire displacement gauge; 9. First displacement gauge; 10. Cable section; 11. Anchor head section; 12. Opening; 13. Tensioning end; 14. Fixed end; 15. Anchor bolt section; 16. Nut; 17. Central screw. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0027] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] like Figure 1 and Figure 2 As shown, a cable tensioning and monitoring device includes:

[0031] The main frame 1 has openings 12 on both sides for the two ends of the cable to pass through.

[0032] The pressure sensor 7, which is an anchor bolt axial force gauge or a through-hole type pressure sensor 7, is set on one side of the main frame 1. One end of the cable serves as a fixed end 14, which passes through the corresponding opening 12 and is connected to the pressure sensor 7.

[0033] A lifting jack 4 is mounted on the main frame 1. A central screw 17 is vertically and movably connected to the lifting rod of the lifting jack 4. The central screw 17 extends downward to form an extension screw section 5. The other end of the cable serves as the tensioning end 13, passing through the corresponding opening 12 and connecting to the end of the extension screw section 5. A nut 16 is screwed to the upper end of the central screw 17. The lifting jack 4 adopts the existing lifting jack 4 technology. The lifting rod is hollow, with an opening directly at the bottom of the lifting jack 4. After welding the central screw 17 to the extension screw section 5, it is inserted into the lifting rod. The tensioning process of the cable is achieved by pushing the nut.

[0034] Before the test, both ends of the cable (anchor bolt portion 15) are passed through the openings 12 on both sides of the main frame 1. One end is connected to the pressure sensor 7 as the fixed end 14, and the other end is connected to the extension screw portion 5 of the lifting jack 4 as the tensioning end 13. During the test, the nut 16 is pushed by the lifting jack 4, so that the extension screw portion 5 of the central screw 17 transmits the axial tension evenly and stably to the cable tensioning end 13. Compared with the traditional tensile testing machine that directly clamps the cable, this connection method avoids local stress concentration. For cables with special structures such as steel strands and semi-parallel steel wire bundles, this method can prevent the internal steel wires from slipping due to uneven stress, ensuring the structural stability of the cable during tensioning, effectively improving the test success rate, avoiding test interruption due to steel wire slippage, and saving time and resource costs.

[0035] Once the cables are tensioned to the target value, the main frame 1 plays a crucial role. As an independent and stable load-bearing structure, it replaces the traditional tensile testing machine in bearing the axial load of the cables. By rationally distributing the load, the stress on the clamping parts of the tensile testing machine is significantly reduced. This design effectively prevents slippage of the clamping parts under prolonged stress, ensuring the accuracy and reliability of data collected by monitoring equipment such as pressure sensor 7. This provides an accurate data foundation for subsequent analysis and research, enhancing the credibility and reference value of the test results.

[0036] As a preferred example of this application, a sleeve 2 is fixedly installed on the side of the main frame 1 near the lifting jack 4. The sleeve 2 is fitted onto the outside of the lifting jack 4, and the lifting jack 4 is movably disposed within the sleeve 2. The sleeve 2 provides precise guidance for the movement of the lifting jack 4, restricting the radial displacement of the jack during tensioning and ensuring that it can only move smoothly along the axial direction, preventing skewing or shaking. This not only helps to ensure uniform stress on the cable and improve the accuracy and stability of cable tensioning, but also reduces the additional stress on other components caused by the unstable movement of the jack, ensuring the reliable operation of the entire device.

[0037] As a preferred example of this application, a first displacement meter 9 is installed on both sides of the main frame 1. The two ends of the first displacement meter 9 are respectively connected to the two ends of the side of the main frame 1 to detect whether the main frame 1 is deformed. The first displacement meters 9 installed on both sides of the main frame 1 can monitor the deformation of the frame in real time and accurately during the tensioning process of the cable. By capturing the minute displacement changes at both ends of the side of the frame and converting them into electrical or digital signals for output, the degree and trend of deformation of the main frame 1 under stress can be intuitively reflected, allowing the test personnel to grasp the working status of the frame in a timely manner.

[0038] As a preferred example of this application, a wire displacement meter 8 is provided on the cable body portion 10. The two ends of the wire displacement meter 8 are connected to the two ends of the cable body portion 10, respectively, for monitoring the displacement of the cable body portion 10. Installing the wire displacement meter 8 on the cable body portion 10 allows for direct and accurate measurement of the expansion and contraction displacement changes of the cable body during tensioning. By recording the relative displacement data at both ends of the cable body in real time, the deformation characteristics of the cable under stress can be intuitively reflected, providing key data for studying the mechanical properties of the cable and facilitating in-depth analysis of parameters such as the elastic modulus and deformation patterns of the cable.

[0039] As a preferred example of this application, each anchor head portion 11 of the cable is equipped with a third displacement meter 6. The two ends of the third displacement meter 6 are connected to the cable body portion 10 and the corresponding anchor head portion 11, respectively, to monitor whether the end of the cable body portion 10 slips. The third displacement meter 6 connects the cable body portion 10 and the anchor head portion 11, enabling real-time monitoring of whether slippage occurs at the cable anchor head during tensioning and load holding. By accurately measuring the relative displacement between the anchor head and the cable body, changes in the anchoring effect of the anchorage can be detected promptly, avoiding cable tension loss due to anchor head slippage and ensuring the accuracy and reliability of the test results.

[0040] As a preferred example of this application, the extension screw portion 5 is fixedly connected to the tensioning end 13 of the cable via a connector 3. The connector 3 consists of an internally threaded sleeve 2 and an externally threaded joint. The externally threaded joint is welded to or integrally formed with the extension screw portion 5. The internally threaded sleeve 2 is fitted onto the tensioning end 13 of the cable (the cable end needs to be machined with external threads, and the connection between the two is achieved by tightening the sleeve 2 (not shown in the figure)). The use of the connector 3 makes the connection operation between the extension screw portion 5 and the tensioning end 13 of the cable simpler and faster, without the need for complex tools and cumbersome installation steps, which can greatly improve the efficiency of test preparation. When changing to different specifications or types of cables for testing, the disassembly and installation of the connecting parts can be completed quickly, saving test time and costs, and improving the flexibility and adaptability of the test work.

[0041] As a preferred example of this application, the main frame 1 is formed by welding four rectangularly arranged steel pipes together. This structural form has good mechanical properties and can effectively resist various loads such as tensile force and bending moment generated during cable tensioning. The rectangular structure can evenly distribute the load under stress, reduce local stress concentration in the frame, improve the overall load-bearing capacity and stability of the frame, and ensure that the main frame 1 can provide reliable support for cable tensioning and monitoring under different working conditions.

[0042] It should be noted that in this application, the sensor data needs to be used in conjunction with an external processing device. That is, the sensor's acquisition signal is sent to the control processor, which processes it and displays it on the terminal device (such as a computer or display screen) to complete the entire monitoring process. In this application, the data is only used for testing and data acquisition, so the processing and display of the monitoring data will not be described in detail.

[0043] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A cable tensioning and monitoring device, characterized in that: include: The main frame (1) has openings (12) on both sides for the two ends of the cable to pass through. A pressure sensor (7) is set on one side of the main frame (1), and one end of the cable serves as a fixed end (14), passing through the corresponding opening (12) and connecting to the pressure sensor (7). A lifting jack (4) is set on the main frame (1). A central screw (17) is vertically and movably connected to the lifting rod of the lifting jack (4). The central screw (17) extends downward to form an extension screw section (5). The other end of the cable serves as the tensioning end (13), passes through the corresponding opening (12), and is connected to the end of the extension screw section (5). A nut (16) is spirally connected to the upper end of the central screw (17).

2. The cable tensioning and monitoring device according to claim 1, characterized in that: A sleeve (2) is installed on the side of the main frame (1) near the lifting jack (4), and the sleeve (2) is installed on the outside of the lifting jack (4).

3. The cable tensioning and monitoring device according to claim 2, characterized in that: The main frame (1) is equipped with a first displacement meter (9) on both sides. The two ends of the first displacement meter (9) are respectively connected to the two ends of the side of the main frame (1) to detect whether the main frame (1) is deformed.

4. The cable tensioning and monitoring device according to claim 3, characterized in that: The main frame (1) is formed by welding four steel pipes arranged in a rectangular shape.

5. The cable tensioning and monitoring device according to claim 4, characterized in that: The cable body (10) is equipped with a cable displacement meter (8), and the two ends of the cable displacement meter (8) are respectively connected to the two ends of the cable body (10) to monitor the displacement of the cable body (10).

6. The cable tensioning and monitoring device according to claim 5, characterized in that: Each anchor head (11) of the cable is equipped with a third displacement meter (6). The two ends of the third displacement meter (6) are connected to the cable body (10) and the corresponding anchor head (11) respectively, and are used to monitor whether the end of the cable body (10) slips.

7. The cable tensioning and monitoring device according to claim 6, characterized in that: The extension screw section (5) is fixedly connected to the tensioning end (13) of the cable via a connector (3).

Images