Wire tensile fatigue strength detection device

Abstract

The utility model relates to a wire tensile fatigue strength detection device, which comprises a mounting platform, a fastening end, a moving end, a tension output part and an operation and display panel, the fastening end and the moving end are each provided with an annular clamping structure, and the operation and display panel is electrically connected with the fastening end, the moving end and the tension output part. According to the device provided by the utility model, the wire rod is clamped by the clamping structure through operation on the operation and display panel, and then the tension output part pulls the movable end to move along the axis direction of the wire rod, so that a tensile test is carried out on the wire rod, and the tension output part transmits a tension output value of the tension output part to the operation and display panel for display; the clamping structure is simple in structure and convenient for experimenters to observe numerical value changes and record test data, the clamping structure in the embodiment can adapt to wire rods with different diameters, meanwhile, after the wire rods are clamped, the wire rods are not prone to falling off in the test process, the test can be conducted for a long time, more accurate test results can be obtained, and the test efficiency is improved. And the door of the mounting platform can protect the safety of experimenters.

Description

Technical Field

[0001] The utility model relates to the technical field of wire detection devices, and particularly relates to a wire tensile fatigue strength detection device. Background Art

[0002] Grounding wires, overhead transmission wires, lightning protection ground wires, etc. are generally made of stranded steel wires, aluminum-clad steel stranded wires (hereinafter referred to as wires), etc. During operation, stress concentration will occur in the wires, and phenomena such as broken wires and broken strands will occur at the parts with larger stress concentration, affecting normal and safe conduction of electricity. This phenomenon of broken strands and broken wires at the parts with larger stress concentration is called the fatigue failure of the wires.

[0003] As an important index for testing the performance of wires, the wire tensile fatigue test has been paid more and more attention by manufacturers and purchasers. However, the existing extrusion-type fatigue strength detection device cannot quickly and stably position and fix the two ends of wires with different diameters. During the experiment, the wires are likely to fall off, and the stretching structure is not reasonably designed, so it cannot operate stably for a long time. During the stretching process, there is a large jitter, which affects the test results. Content of the Utility Model

[0004] In order to solve the problem that the existing detection device cannot quickly clamp and fix wires with different diameters, the utility model provides a wire tensile fatigue strength detection device, including: an installation platform, a fastening end, a mobile end, a tensile force output part, an operation and display panel;

[0005] The installation platform is a cavity with a door;

[0006] Both the fastening end and the tensile force output part are fixedly installed in the cavity;

[0007] The inner diameter of the annular clamping structure is adapted to the outer diameter of the wire;

[0008] The mobile end is slidably installed in the cavity, located between the fastening end and the tensile force output part, and is connected to the output end of the tensile force output part;

[0009] Both the fastening end and the mobile end are provided with annular clamping structures;

[0010] The two clamping structures are arranged oppositely, and their axes are collinear and parallel to the output tensile force direction of the tensile force output part;

[0011] The operation and display panel is installed outside the cavity and is electrically connected to the fastening end, the mobile end and the tensile force output part.

[0012] Preferably, the clamping structure includes a mounting plate, a fixed arc block, a movable arc block and a movable power unit;

[0013] The mounting plate is perpendicular to the inner surface of the cavity of the mounting platform;

[0014] The fixed arc block is fixedly mounted on the mounting plate;

[0015] The movable arc block is slidably mounted on the mounting plate;

[0016] The fixed arc block and the movable arc block form the ring;

[0017] The movable power unit is mounted on the mounting plate, and its output end is connected to the movable arc block.

[0018] Preferably, a sliding block is provided on the movable arc block;

[0019] A sliding groove is formed in the mounting plate;

[0020] The sliding block is mounted in the sliding groove and moves along the sliding groove.

[0021] Preferably, clamping tips are provided on the arc-shaped inner sides of the fixed arc block and the movable arc block;

[0022] The clamping tips are pyramidal or conical, and the tip ends face the center of the arc.

[0023] Preferably, a force sensor is provided on the arc-shaped inner side of the fixed arc block;

[0024] The force sensor is electrically connected to the operation and display panel.

[0025] Preferably, the movable power unit includes a motor and a threaded rod;

[0026] The output end of the motor is coaxially fixed to one end of the threaded rod, and the other end of the threaded rod is in threaded transmission with the movable arc block.

[0027] Preferably, an auxiliary plate is provided between the motor and the movable arc block;

[0028] The auxiliary plate is perpendicularly mounted on the mounting plate;

[0029] The end of the threaded rod away from the movable arc block is a smooth shaft and is rotatably mounted on the auxiliary plate.

[0030] Preferably, a ratchet and pawl mechanism is provided at the end of the threaded rod away from the movable arc block;

[0031] The ratchet and pawl mechanism is mounted on the side of the auxiliary plate away from the movable arc block;

[0032] The rotation stopping direction of the ratchet and pawl mechanism is the same as the rotation direction of the threaded rod when the movable arc block moves away from the fixed arc block.

[0033] Preferably, a movable cylinder is arranged on the side surface of the auxiliary plate away from the movable arc block;

[0034] The output end of the movable cylinder is rotatably connected to the pawl of the ratchet and pawl mechanism;

[0035] The movable cylinder is electrically connected to the operation and display panel through a wire.

[0036] Preferably, the tensile force output part includes a tensile cylinder and a force sensor;

[0037] The output end of the tensile cylinder, the force sensor and the movable end are connected in sequence;

[0038] Both the tensile cylinder and the force sensor are electrically connected to the operation and display panel.

[0039] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0040] The present utility model provides a wire tensile fatigue strength detection device, including: a mounting platform, a fastening end, a movable end, a tensile force output part, an operation and display panel; the mounting platform is a cavity with a door; both the fastening end and the tensile force output part are fixedly installed in the cavity; the movable end is slidably installed in the cavity and is located between the fastening end and the tensile force output part, and is connected to the output end of the tensile force output part; both the fastening end and the movable end are provided with annular clamping structures; the inner diameter of the annular clamping structure is adapted to the outer diameter of the wire; the two clamping structures are arranged opposite to each other, and their axes are collinear and parallel to the output tensile force direction of the tensile force output part; the operation and display panel is installed outside the cavity and is electrically connected to the fastening end, the movable end and the tensile force output part. The device provided by the present utility model operates on the operation and display panel to clamp the wire with the clamping structure, and then makes the tensile force output part pull the movable end to move along the axis direction of the wire, so as to perform a tensile test on the wire. The tensile force output part transmits its own tensile force output value to the operation and display panel for display, which is convenient for experimental personnel to observe the numerical change and record the test data. The clamping structure in this embodiment can adapt to wires with different diameters. At the same time, after clamping the wire, the wire is not easy to fall off during the experiment, and the experiment can be carried out for a long time to obtain more accurate experimental results. Moreover, the door of the mounting platform can protect the safety of experimental personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic structural diagram of the wire tensile fatigue strength detection device of the present utility model;

[0042] Figure 2 It is a schematic structural diagram of the wire tensile fatigue strength detection device of the present utility model in the open door state;

[0043] Figure 3 It is a schematic front-side structure diagram inside the cavity of the present utility model;

[0044] Figure 4 It is a schematic rear-side structure diagram inside the cavity of the present utility model;

[0045] Figure 5 It is a schematic front-side structure diagram of the mobile end of the present utility model;

[0046] Figure 6 It is a schematic rear-side structure diagram of the mobile end of the present utility model;

[0047] Figure 7 It is a schematic front-side structure diagram of the fixed arc block and the movable arc block of the present utility model;

[0048] Figure 8 It is a schematic rear-side structure diagram of the fixed arc block and the movable arc block of the present utility model;

[0049] Figure 9 It is a schematic front-side structure diagram of the movable power unit of the present utility model;

[0050] Figure 10 It is a schematic rear-side structure diagram of the movable power unit of the present utility model.

[0051] Among them, 1. Installation platform; 2. Fastening end; 3. Mobile end; 4. Installation plate; 5. Fixed arc block; 6. Movable arc block; 7. Motor; 8. Threaded rod; 9. Ratchet and pawl mechanism; 10. Movable cylinder; 11. Pulling cylinder; 12. Tensile force sensor; 13. Door opening; 14. Observation window; 15. Pressure sensor. Specific embodiments

[0052] In order to better understand the present utility model, the content of the present utility model will be further described below in conjunction with the specification drawings and examples.

[0053] The utility model provides a wire tensile fatigue strength detection device. By operating on the operation and display panel, the clamping structure clamps the wire, and then the tensile force output part pulls the mobile end to move along the axis direction of the wire, so as to conduct a tensile test on the wire. The tensile force output part transmits its own tensile force output value to the operation and display panel for display, which is convenient for the experimenter to observe the numerical change and record the test data. The clamping structure in this embodiment can adapt to wires with different diameters. At the same time, after clamping the wire, the wire is not easy to fall off during the experiment, and the test can be carried out for a long time to obtain more accurate test results. Moreover, the opening of the installation platform can protect the safety of the experimenter.

[0054] Embodiment:

[0055] As Figure 1 and Figure 2 shown, a wire tensile fatigue strength detection device includes: an installation platform 1, a fastening end 2, a mobile end 3, a tensile force output part, and an operation and display panel; the installation platform 1 is a cavity with an opening 13; both the fastening end 2 and the tensile force output part are fixedly installed in the cavity; the inner diameter of the annular clamping structure is adapted to the outer diameter of the wire; the mobile end 3 is slidably installed in the cavity and is located between the fastening end 2 and the tensile force output part and is connected to the output end of the tensile force output part; annular clamping structures are provided on both the fastening end 2 and the mobile end 3; the two clamping structures are arranged oppositely, and their axes are collinear and parallel to the output tensile force direction of the tensile force output part; the operation and display panel is installed outside the cavity and is electrically connected to the fastening end 2, the mobile end 3, and the tensile force output part.

[0056] For the convenience of description, in this embodiment, as Figure 3 and Figure 4 shown, the cavity is a cuboid cavity arranged in the horizontal direction. The fastening end 2, the mobile end 3, and the tensile force output part are all installed on the bottom wall of the cuboid cavity, and the fastening end 2 and the tensile force output part are respectively installed at both ends of the cavity. Two parallel guide rails are provided on the bottom wall of the cavity, and the two ends of the guide rails are respectively fixedly connected to both ends of the cavity wall. The mobile end 3 is slidably installed on the guide rails. In this embodiment, the structures of the fastening end 2 and the mobile end 3 are the same, and the parts on the fastening end 2 and the parts on the mobile end 3 are completely symmetrically arranged; in order to prevent the inclination of the mobile end 3 during the experiment, the guide rails are set as T-shaped, and a T-shaped guide groove adapted to the guide rails is provided on the lower side of the mobile end 3.

[0057] As Figure 5 and Figure 6 shown, the clamping structure includes a mounting plate 4, a fixed arc block 5, a movable arc block 6, and a movable power unit; the mounting plate 4 is perpendicular to the inner surface of the cavity of the installation platform 1; the fixed arc block 5 is fixedly installed on the mounting plate 4; the movable arc block 6 is slidably installed on the mounting plate 4; as Figure 7 and Figure 8As shown, the fixed arc block 5 and the movable arc block 6 form a ring; the movable power unit is installed on the mounting plate 4, and its output end is connected to the movable arc block 6. In this embodiment, the arcs of the fixed arc block 5 and the movable arc block 6 are arranged opposite to each other, and the arcs are semi-elliptical arcs. As the distance between the fixed arc block 5 and the movable arc block 6 is different, it can adapt to wire materials with different diameters. Among them, the mounting plate 4 of the fastening end 2 is fixedly connected to the mounting platform 1, and a guide groove is provided on the lower side of the mounting plate 4 of the movable end 3.

[0058] A sliding block is provided on the movable arc block 6; a sliding groove is formed on the mounting plate 4; the sliding block is installed in the sliding groove and moves along the sliding groove. In this embodiment, both the sliding block and the sliding groove are T-shaped. For the convenience of installation, a T-shaped sliding groove is first formed on the mounting plate 4. When the sliding block is installed in the sliding groove, the end of the sliding groove is blocked to prevent the sliding block and the sliding groove from separating during use.

[0059] Clamping tips are provided on the inner arc surfaces of the fixed arc block 5 and the movable arc block 6; the clamping tips are pyramid-shaped or conical, and the tip ends face the center of the arc. A force sensor is provided on the inner arc surface of the fixed arc block 5; the force sensor is electrically connected to the operation and display panel. In this embodiment, the force sensor provided in the fixed arc block 5 is a pressure sensor 15. When clamping the wire material, the wire material will squeeze the pressure sensor 15, causing a pressure change in the pressure sensor 15, so as to output a pressure signal to the operation and display panel, and then know whether the wire material is clamped. If the minimum value of the clamping force when the wire material is clamped is not known, it is necessary to conduct tests first to determine the minimum value of the clamping force, so as to facilitate the formal detection test. In the experimental preparation stage, if the actual clamping force exceeds the minimum value of the clamping force, it can be judged that the wire material is in a clamped state. At the same time, it is necessary to determine the maximum value of the clamping force through experiments in advance. At this time, the maximum value of the clamping force is the value of the destructive force of the wire material.

[0060] As Figure 9 and Figure 10 shown, the movable power unit includes a motor 7 and a threaded rod 8; the output end of the motor 7 is coaxially fixed to one end of the threaded rod 8, and the other end of the threaded rod 8 is in threaded transmission with the movable arc block 6. An auxiliary plate is provided between the motor 7 and the movable arc block 6; the auxiliary plate is vertically installed on the mounting plate 4; the end of the threaded rod 8 away from the movable arc block 6 is a smooth shaft and is rotatably installed on the auxiliary plate. In order to increase the magnitude of the force transmitted between the threaded rod 8 and the movable arc block 6, a threaded transmission block is provided on the side of the movable arc block 6 facing the threaded rod 8. The threaded transmission block is a rectangular block and is integrally formed with the movable arc block 6. In this embodiment, the threaded rod 8 is only in threaded connection with the threaded transmission block.

[0061] In order to prevent the movable arc block 6 and the fixed arc block 5 from moving away from each other during the experiment, a ratchet and pawl mechanism 9 is provided at the end of the threaded rod 8 away from the movable arc block 6; the ratchet and pawl mechanism is installed on the side of the auxiliary plate away from the movable arc block 6; the anti-rotation direction of the ratchet and pawl mechanism is the same as the rotation direction of the threaded rod 8 when the movable arc block 6 moves away from the fixed arc block 5.

[0062] In order to enable reuse, a movable cylinder 10 is provided on the side of the auxiliary plate away from the movable arc block 6; the output end of the movable cylinder 10 is rotatably connected to the pawl of the ratchet and pawl mechanism 9; the movable cylinder 10 is electrically connected to the operation and display panel through a wire. After the experiment is completed, the pawl is pulled by the movable cylinder 10 to separate the pawl from the ratchet, so that the threaded rod 8 can rotate, thereby realizing the separation and replacement of the clamping structure and the wire. In this embodiment, a bevel gear set is provided between the motor 7 and the threaded rod 8 to enable a change in the rotation direction. The ratchet of the ratchet and pawl mechanism 9 and one of the bevel gears in the bevel gear set are concentrically fixed to the end of the optical axis of the threaded rod 8, and the other bevel gear in the bevel gear set is key-connected to the output shaft of the motor 7.

[0063] The tensile force output part includes a tensile cylinder 11 and a force sensor; the output end of the tensile cylinder 11, the force sensor and the movable end 3 are connected in sequence; the tensile cylinder 11 and the force sensor are both electrically connected to the operation and display panel. In this embodiment, the force sensor of the tensile force output part is a tensile force sensor 12, which can transmit the value of the tensile force provided by the tensile cylinder 11 to the operation and display panel in the form of an electrical signal during the experiment, and record the value and change of the above tensile force.

[0064] In this embodiment, the operation and display panel includes an operation panel and a display panel. The operation panel is used to control the start and stop of the movement of the motor 7, the movable cylinder 10 and the tensile cylinder 11, while the display panel is used to receive the electrical signals transmitted by the tensile force sensor 12 and the pressure sensor 15, and convert the electrical signals into force value signals for display, which is convenient for experimental personnel to observe and record. At the same time, a control program is set in the display panel, and thresholds of the minimum clamping force and the maximum clamping force are preset therein. When the clamping force transmitted by the pressure sensor 15 is greater than the minimum clamping force and less than the maximum clamping force, the control program automatically issues a stop signal to stop the operation of the motor 7. If during the actual experiment, although the clamping force meets the above requirements, but does not meet the experimental requirements, the motor 7 can be restarted through the button on the operation panel for wire clamping operation, but the magnitude of the final clamping force cannot exceed the maximum clamping force.

[0065] In this embodiment, the installation platform 1 includes a door 13 on the side and an observation window 14 on the upper side. The door 13 is used to install the fastening end 2, the mobile end 3, and the tensile output part, and at the same time, it is used to protect the safety of the experimenter, preventing the wire from breaking due to excessive tensile force during the experiment, thus causing personal injury. The observation window 14 is used to observe the state changes of the wire during the experiment and the state changes of each structure that may occur during the experiment.

[0066] In order to increase the accuracy of wire clamping and reduce the harm to the experimenter during the process of clamping the wire, a plurality of lifting plates are arranged between the fixed arc block 5 and the movable arc block 6. The upper part of the lifting plate is arc-shaped, and the opening of the arc is upward. The lower half of the lifting plate is rectangular and is fixedly installed in the cavity. The center of the arc of the lifting plate is collinear with the center of the arc of the fixed arc block 5. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0067] The above are only the embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are included in the scope of the claims of the present application.

Claims

1. A wire tensile fatigue strength testing device, characterized in that: include: An installation platform (1), a fastening end (2), a moving end (3), a tension output unit, and an operation and display panel; The installation platform (1) is a cavity having an opening (13); The fastening end (2) and the tension output portion are both fixedly installed in the cavity; The movable end (3) is slidably mounted in the cavity, and is located between the fastening end (2) and the tension output portion, and is connected to the output end of the tension output portion; The fastening end (2) and the movable end (3) are both provided with an annular clamping structure; The inner diameter of the ring of the clamping structure is adapted to the outer diameter of the wire; The two clamping structures are arranged opposite to each other, and their axes are collinear and parallel to the output tension direction of the tension output part; The operation and display panel is installed outside the cavity and is electrically connected to the fastening end (2), the moving end (3) and the tension output portion.

2. A wire tensile fatigue strength testing device according to claim 1, characterized in that: The clamping structure comprises a mounting plate (4), a fixed arc block (5), a movable arc block (6) and a movable power unit; The mounting plate (4) is perpendicular to the inner surface of the cavity of the mounting platform (1); The fixed arc block (5) is fixedly mounted on the mounting plate (4); The movable arc block (6) is slidably mounted on the mounting plate (4); The fixed arc block (5) and the movable arc block (6) form the ring shape; The movable power unit is mounted on the mounting plate (4), and its output end is connected to the movable arc block (6).

3. A wire tensile fatigue strength testing device according to claim 2, characterized in that: The movable arc block (6) is provided with a sliding block; The mounting plate (4) is provided with a sliding groove; The sliding block is installed in the sliding groove and moves along the sliding groove.

4. A wire tensile fatigue strength testing device according to claim 2, characterized in that: The fixed arc block (5) and the movable arc block (6) are both provided with clamping tips on their arc-shaped inner sides; The clamping tip is in a pyramid or cone shape, and the tip portion faces the center of the arc.

5. A wire tensile fatigue strength testing device according to claim 2, characterized in that: A force sensor is provided on the arc-shaped inner side surface of the fixed arc block (5); The force sensor is electrically connected to the operation and display panel.

6. A wire tensile fatigue strength testing device according to claim 2, characterized in that: The movable power unit comprises an electric motor (7) and a threaded rod (8); The output end of the motor (7) is coaxially fixed with one end of the threaded rod (8), and the other end of the threaded rod (8) is threadedly driven with the movable arc block (6).

7. A wire tensile fatigue strength testing device according to claim 6, characterized in that: An auxiliary plate is provided between the motor (7) and the movable arc block (6); The auxiliary plate is vertically mounted on the mounting plate (4); The end of the threaded rod (8) away from the movable arc block (6) is an optical axis and is rotatably mounted on the auxiliary plate.

8. A wire tensile fatigue strength testing device according to claim 7, characterized in that: A ratchet and pawl mechanism (9) is provided at the end of the threaded rod (8) away from the movable arc block (6); The ratchet and pawl mechanism (9) is installed on the side of the auxiliary plate away from the movable arc block (6); The rotation-stopping direction of the ratchet pawl mechanism (9) is the same as the rotation direction of the threaded rod (8) when the movable arc block (6) moves away from the fixed arc block (5).

9. A wire tensile fatigue strength testing device according to claim 8, characterized in that: A movable cylinder (10) is provided on the side of the auxiliary plate away from the movable arc block (6); The output end of the movable cylinder (10) is rotatably connected to the pawl of the ratchet and pawl mechanism (9); The movable cylinder (10) is electrically connected to the operation and display panel via a wire.

10. A wire tensile fatigue strength testing device according to claim 1, characterized in that: The tension output part comprises a tension cylinder (11) and a force sensor; The output end of the tension cylinder (11), the force sensor and the moving end (3) are connected in sequence; The tension cylinder (11) and the force sensor are both electrically connected to the operation and display panel.

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