A cable tensile test apparatus

Abstract

The utility model discloses a kind of cable tensile detection test equipment, belong to cable testing technical field, including detector, mounting rack assembly is provided on the detector, guiding mechanism one and guiding mechanism two are rotatably connected on the mounting rack assembly, locking mechanism for locking cable end is further provided on the mounting rack assembly.The utility model is through the setting of mounting rack assembly, guiding mechanism one, guiding mechanism two, stranding mechanism and drive mechanism, realize by stranding to cable for testing, realize the miniaturization of equipment, without occupying larger space can be to longer cable long-stroke test, and power is sufficient, tension is adjustable, the utility model is through the setting of locking mechanism one and locking mechanism two, staff can conveniently and quickly lock the two ends of cable, to effectively improve the efficiency of test operation.

Description

Technical Field

[0001] The utility model relates to the technical field of cable testing, in particular to a cable tensile detection test device. Background Technique

[0002] Cables are used for power and electrical transmission. Due to requirements such as civil engineering construction burial and engineering erection, rubber tissues such as the insulating layer and shielding layer need to have characteristics such as sufficient tensile strength and elongation. Cable tensile testing is an important means to evaluate the mechanical properties of the insulating layer and sheath layer of cables and is carried out on a dedicated tensile testing machine. First, both ends of the prepared cable sample are firmly clamped in the fixture, and a tensile force is applied at a constant rate until the sample breaks. During the process, the tensile force value and the elongation of the sample are monitored in real time, and the maximum tensile force at the time of fracture is recorded. Then, the tensile strength is calculated in combination with the cross-sectional area of the cable and compared with the standard value. If the actual value meets the standard and the morphology at the fracture is good, the cable's tensile performance is qualified.

[0003] During the cable tensile testing experiment, a tensile detection test device is often used. Existing tensile testing devices mostly use linear stretching, that is, an electric cylinder, a pneumatic cylinder, a hydraulic cylinder or a screw rod is used to linearly stretch the cable to perform tensile detection on the cable. For example, in the existing Chinese utility model patent with the publication number CN222364864U, when this device is used, both ends of the cable are respectively clamped on the fixed seat and the sliding seat, and then the lifting cylinder is opened to stretch the cable through the pull rope. Although this tensile testing device can perform tensile testing on the cable, the detection device in the comparative document has a complex structure, is difficult to debug, has a high failure rate, occupies a large amount of space, and causes congestion in the test room. Content of the Utility Model

[0004] Aiming at the deficiencies in the above-mentioned existing technologies, the utility model provides a cable tensile detection test device with a simple structure, convenient operation, small floor area and high measurement accuracy.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A cable tensile detection test device includes a detector and a mounting frame assembly installed on the detector. The mounting frame assembly includes a frame body, and a tensile sensor is provided on the frame body;

[0007] A first guide wheel, a second guide wheel and a wire winding disc are rotatably connected to the frame body;

[0008] The tensile sensor is connected to a first locking mechanism, and the wire winding disc is connected to a second locking mechanism;

[0009] The frame body is provided with a driving mechanism for driving the wire winding disc;

[0010] The front side of the frame is provided with a tensile detection mechanism, including a slide rail, a first slider and a second slider slidably disposed on the slide rail, the first slider is provided with a distance measuring sensor, and the second slider is provided with a reflector.

[0011] Preferably, the drive mechanism includes a servo motor, a planetary reducer connected to the output shaft of the servo motor, and a right-angle reducer connected to the output end of the planetary reducer. The output end of the right-angle reducer drives the stranded coil through a hexagonal socket.

[0012] Preferably, the first locking mechanism includes a base detachably connected to the tension sensor, and an arc-shaped hoop and a movable hoop are hinged on the base, the arc-shaped hoop and the movable hoop being locked together by bolts.

[0013] Preferably, the side wall of the strand reel has a U-shaped groove.

[0014] Preferably, the ranging sensor is a laser sensor, and the reflector is aligned with the optical path of the ranging sensor.

[0015] Preferably, the first slider and the second slider are respectively provided with a first clamp and a second clamp for holding the cable.

[0016] The advantages of this utility model over the prior art are:

[0017] This utility model discloses a cable tensile strength testing device. Through the arrangement of a mounting frame assembly, a guide mechanism one, a guide mechanism two, a stranding mechanism, and a drive mechanism, this device enables cable testing via stranding, achieving miniaturization and allowing for long-stroke testing of relatively long cables without requiring a large space. It also features sufficient power and adjustable tension. The locking mechanisms one and two allow operators to easily and quickly lock both ends of the cable, effectively improving testing efficiency and enabling non-contact elongation measurement.

[0018] This utility model discloses a cable tensile strength testing device. The stranded coil and the double guide wheels form a spatial zigzag path, which reduces the equipment's footprint. The laser ranging mechanism calculates the elongation rate by measuring the displacement difference between two points, avoiding installation interference from traditional elongation gauges. The quick-release structure of the hexagonal socket and hexagonal prism facilitates the replacement of stranded coils of different diameters. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of a cable tensile strength testing device according to the present invention;

[0020] Figure 2 This is a second-view structural schematic diagram of a cable tensile strength testing device according to the present invention;

[0021] Figure 3This is a schematic diagram of the testing instrument and mounting bracket assembly of a cable tensile strength testing equipment according to this utility model;

[0022] Figure 4 This is a schematic diagram of the locking mechanism of a cable tensile strength testing device according to the present invention;

[0023] Figure 5 This is a schematic diagram of the stranding mechanism and locking mechanism two of the cable tensile strength testing equipment of this utility model;

[0024] Figure 6 This is a schematic diagram of the drive mechanism of a cable tensile strength testing device according to the present invention;

[0025] Figure 7 This is a schematic diagram of the tensile testing mechanism of a cable tensile testing equipment.

[0026] Explanation of symbols for key components in the attached diagram:

[0027] In the diagram: 1. Detector; 101. Main unit housing; 102. Control panel; 103. Display screen; 2. Mounting bracket assembly; 201. Frame; 202. Bearing 1; 203. Bearing 2; 204. Bearing 3; 205. Tension sensor; 3. Guide mechanism 1; 301. Rotating shaft; 302. Guide pulley; 4. Guide mechanism 2; 401. Rotating shaft; 402. Guide pulley; 5. Locking mechanism 1; 501. Base; 502. Arc-shaped hoop; 503. Locking tooth 1; 504. Fixed seat; 505. Movable hoop; 506. Locking tooth 2; 507. Connecting bolt; 5 08. Connecting seat; 509. Threaded hole of fixing seat; 510. Threaded hole of connecting seat; 6. Stranding mechanism; 601. Drive shaft; 602. Hexagonal prism; 603. Stranding reel; 604. Groove; 7. Locking mechanism two; 8. Drive mechanism; 801. Servo motor; 802. Planetary reducer; 803. Right angle reducer; 804. Hexagonal sleeve; 901. Slide rail; 902. Slide groove; 903. First slider; 904. Fixing frame; 905. Distance sensor; 906. First wire clamp; 907. Second slider; 908. Reflector; 909. Second wire clamp. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0029] like Figures 1 to 7A cable tensile strength testing device includes a testing instrument 1, which includes a main housing 101, a control panel 102, and a display screen 103. A mounting frame assembly 2 is mounted on the main housing 101, and a locking mechanism 5 for locking one end of the cable is also mounted on the mounting frame assembly 2. A stranding mechanism 6 for providing tensile force is rotatably connected to the mounting frame assembly 2, and a second locking mechanism 7 is mounted on the stranding mechanism 6. The mounting frame assembly 2 includes a frame body 201 bolted to the top of the main housing 101; a guide mechanism 3 and a second guide mechanism 4 are rotatably connected to the frame body 201; a drive mechanism 8 for providing power is also mounted on the mounting frame assembly 2; a tensile sensor 205 is vertically aligned with the guide mechanism 3; and a tensile testing mechanism 9 is located at the front end of the mounting frame assembly 2. The main unit housing 101 houses a PLC controller, processor, power module, etc. Operators can interact with the device through the control panel 102 and display screen 103. The frame 201 is equipped with bearing 1 202, bearing 203, and bearing 3 204. A tension sensor 205 is also installed on the frame 201. The tension sensor 205 is a spoke-type tension sensor and is electrically connected to the detector 1. The frame 201, bearing 1 202, bearing 203, and bearing 3 204 are all made of stainless steel. The outer rings of bearing 1 202, bearing 203, and bearing 3 204 are fixed to the frame 201, while the inner rings of bearing 1 202, bearing 203, and bearing 3 204 can rotate relative to the frame 201.

[0030] like Figure 1 , Figure 2 and Figure 4As shown, guide mechanism 1 3 and guide mechanism 2 4 are rotatably connected to the mounting bracket assembly 2. Guide mechanism 1 3 includes a rotating shaft 301 fixed to the inner ring of bearing 1 202. One end of the rotating shaft 301 is fixed with a guide pulley 302. Guide mechanism 1 3 is vertically aligned with the tension sensor 205. The guide pulley 302 rotates relative to the frame 201 through the rotating shaft 301 and bearing 1 202. Guide mechanism 2 4 is fixed to bearing 2 203. Guide mechanism 2 4 has the same structure as guide mechanism 1 3, and guide mechanism 2 4 and guide mechanism 1 3 are located at the same horizontal height. The mounting bracket assembly 2 also has a locking mechanism 1 5 for locking one end of the cable. Locking mechanism 1 5 includes a base 501 connected to the force-bearing end of the tension sensor 205. An arc-shaped hoop 502 is provided on the base 501. A locking tooth 503 is provided on the inner side of the arc-shaped hoop 502. A fixing seat 504 is provided on the arc-shaped hoop 502. The fixed seat 504 is provided with a fixed seat threaded hole 509. The curved hoop 502 is hinged with a movable hoop 505. The inner side of the movable hoop 505 is provided with a second locking tooth 506. The movable hoop 505 is provided with a connecting seat 508. The connecting seat 508 is provided with a connecting seat threaded hole 510. The fixed seat threaded hole 509 and the connecting seat threaded hole 510 are connected by a connecting bolt 507. When the operator needs to fix one end of the cable, the cable can be inserted between the curved hoop 502 and the movable hoop 505, and the connecting bolt 507 can be manually tightened. At this time, the curved hoop 502 and the movable hoop 505 will clamp the cable. The first locking tooth 503 and the second locking tooth 506 are staggered in the vertical direction, thereby improving the clamping friction. The curved hoop 502, the first locking tooth 503, the movable hoop 505 and the second locking tooth 506 are all made of metal, which can effectively clamp the cable. Through this structure, the device can conveniently and firmly clamp the cable.

[0031] like Figure 1 and Figure 5 As shown, the mounting bracket assembly 2 is also rotatably connected to a stranding mechanism 6 for providing tension. The stranding mechanism 6 is equipped with a second locking mechanism 7. The stranding mechanism 6 includes a drive shaft 601 fixed to the inner ring of the bearing 204. One end of the drive shaft 601 is fixed with a hexagonal prism 602, and the other end of the drive shaft 601 is fixed with a stranding disc 603. The stranding disc 603 has a slot 604, which is a U-shaped slot 604, which is opened on the side plate of the stranding disc 603. The second locking mechanism 7, which has the same structure as the first locking mechanism 5, is fixed on the stranding disc 603. The stranding mechanism 6 is vertically aligned with the second guiding mechanism 4. When the operator fixes the cable, one end of the cable can be fixed to the first locking mechanism 5, and the cable can be wound upwards around the upper edges of the first guiding mechanism 3 and the second guiding mechanism 4 respectively. The end of the cable is wound downwards around the stranding disc 603, and then passed through the slot 604. It is locked by the second locking mechanism 7, thereby completing the fixation of both ends of the cable.

[0032] like Figure 1 and Figure 6 As shown, the mounting bracket assembly 2 is also equipped with a drive mechanism 8 for providing power. The drive mechanism 8 includes a servo motor 801 mounted on the frame 201. The output shaft of the servo motor 801 is connected to the input shaft of a planetary reducer 802. The output end of the planetary reducer 802 is connected to a right-angle reducer 803. A hexagonal sleeve 804 is provided at the end of the output shaft of the right-angle reducer 803. A hexagonal prism 602 is disposed within the hexagonal sleeve 804. The output end of the right-angle reducer 803 is welded to the hexagonal sleeve 804. The servo motor 801 can precisely control the output speed and torque to achieve adjustment of the tension. The hexagonal prism 602 is inserted into the hexagonal sleeve 804. The planetary reducer 802 and the right-angle reducer 803 can perform two-stage reduction of the servo motor 801. Furthermore, it can steer the power output of the servo motor 801, thereby causing the hexagonal socket 804 to rotate, which in turn causes the stranding mechanism 6 to rotate to take in or release the cable. When the stranding mechanism 6 rotates to take in the cable, it pulls the cable, thus performing a tensile test on the cable. The two-stage reduction mechanism consisting of the planetary reducer 802 and the right-angle reducer 803 ensures that the servo motor 801 can output sufficiently high torque for the tensile test. When the cable is pulled, the tensile sensor 205 can transmit the tensile data to the detector 1 and display it on the display screen 103. Through this structure, the tensile testing equipment is miniaturized, and tensile testing can be performed without a long linear space. Moreover, its testing length is not limited by the stroke and it is suitable for cables of various lengths.

[0033] like Figure 1 and Figure 7As shown, the tensile testing mechanism 9 is mounted on a slide rail 901 on the frame 201. A slide groove 902 is provided on the slide rail 901. A first slider 903 is slidably mounted on the left side of the slide groove 902. A fixed frame 904 is integrally connected to the bottom end of the first slider 903. A distance sensor 905 is mounted on the fixed frame 904. The distance sensor 905 is a laser displacement sensor (such as KEYENCE) with an accuracy of ±0.1mm. LK-G500); A first wire clamp 906 is fixed to the top of the first slider 903, and a second slider 907 is slidably arranged on the right side of the slide groove 902. A reflector 908 is provided at the bottom of the second slider 907, and a second wire clamp 909 is fixed to the top of the second slider 907. The ranging sensor 905 is a high-precision laser sensor. The ranging sensor 905 is electrically and communicatively connected to the detection instrument mechanism 1. Before the detection begins, the operator can clamp the first wire clamp 906 and the second wire clamp 909 at two points on the cable, respectively. At this time, the ranging sensor 905 can reflect the reflector 909. The laser beam 908 emits a laser and detects the initial distance between the first clamp 906 and the second clamp 909. When the detection force of the device reaches the specified value, the cable is stretched, and the distance between the first slider 903 and the second slider 907 increases. The distance sensor 905 can transmit the distance between the first clamp 906 and the second clamp 909 at this time to the detection mechanism 1. The detection mechanism 1 can calculate the stretch ratio of the cable under the specified tension based on the initial distance between the first clamp 906 and the second clamp 909 and the distance after stretching, which effectively improves the diversity and accuracy of the measurement data of the device.

[0034] When using this utility model, the operator first fixes one end of the cable in the locking mechanism 5, then passes the cable upwards around the guide mechanism 3 and the guide mechanism 4, and wraps the end of the cable around the twisting mechanism 6 and fixes it on the locking mechanism 7. Then, the operator turns on the drive mechanism 8 through the control panel 102. At this time, the twisting mechanism 6 will rewind, and the tension sensor 205 will transmit the tension data to the detector 1 and display it on the display screen 103.

[0035] This utility model discloses a cable tensile strength testing device. Through the arrangement of the mounting frame assembly, guide mechanism one, guide mechanism two, stranding mechanism and drive mechanism, this utility model realizes the testing of cables by stranding, achieves the miniaturization of the equipment, and has sufficient power and adjustable tension. Through the setting of locking mechanism one and locking mechanism two, the staff can easily and quickly lock the two ends of the cable, thereby effectively improving the efficiency of the testing operation.

[0036] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the structure of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A cable tensile strength testing device, comprising a testing instrument (1) and a mounting bracket assembly (2) mounted on the testing instrument (1), characterized in that: The mounting bracket assembly (2) includes a frame (201) and a tension sensor (205) is provided on the frame (201). The frame (201) is rotatably connected to a first guide wheel (302), a second guide wheel (402), and a stranding reel (603). The tension sensor (205) is connected to the first locking mechanism (5), and the stranded wire reel (603) is connected to the second locking mechanism (7). The frame (201) is equipped with a drive mechanism (8) for driving the stranded wire reel (603); The frame (201) is provided with a tensile testing mechanism (9) on the front side, including a slide rail (901), a first slider (903) and a second slider (907) slidably disposed on the slide rail (901), the first slider (903) is provided with a distance sensor (905), and the second slider (907) is provided with a reflector (908).

2. The cable tensile strength testing equipment according to claim 1, characterized in that: The drive mechanism (8) includes a servo motor (801), a planetary reducer (802) connected to the output shaft of the servo motor (801), and a right-angle reducer (803) connected to the output end of the planetary reducer (802). The output end of the right-angle reducer (803) drives the stranded coil (603) through a hexagonal socket (804).

3. The cable tensile strength testing equipment according to claim 1, characterized in that: The first locking mechanism (5) includes a base (501) detachably connected to the tension sensor (205). An arc-shaped hoop (502) and a movable hoop (505) are hinged on the base (501). The arc-shaped hoop (502) and the movable hoop (505) are locked together by bolts (507).

4. The cable tensile strength testing equipment according to claim 1, characterized in that: The side wall of the strand reel (603) is provided with a U-shaped groove (604).

5. The cable tensile strength testing equipment according to claim 1, characterized in that: The ranging sensor (905) is a laser sensor, and the reflector (908) is aligned with the optical path of the ranging sensor (905).

6. The cable tensile strength testing equipment according to claim 1, characterized in that: The first slider (903) and the second slider (907) are respectively provided with a first clamp (906) and a second clamp (909) for holding the cable.

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