Wire elongation testing device

Abstract

The utility model relates to the technical field of wire rod mechanical performance detection devices, in particular to a wire rod elongation testing device which comprises a detector, a sliding rail is fixedly installed on the detector, a sliding block is installed on the sliding rail in a sliding mode, and clamping mechanisms are arranged on the detector and the sliding block and used for independently clamping cable cores of a multi-core cable. And an auxiliary mechanism is arranged among the detector, the sliding block and the sliding rail and is used for pre-fixing a multi-core cable or clamping a common cable. According to the utility model, through the arrangement of the clamping mechanism, each cable core of the multi-core stranded cable can be independently clamped, and the multi-core stranded cable can be twisted tightly again, so that the problem of uneven stress of the stranded cable during a tensile test can be effectively avoided, and the accuracy during tensile test detection is effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of wire mechanical property testing devices, specifically a wire elongation testing device. Background Technology

[0002] Cables are a general term for items such as optical fibers and electrical cables. Cables have many uses, primarily for control installation, equipment connection, and power transmission, making them a common and indispensable item in daily life. A cable mainly consists of a conductor and a protective layer surrounding it. After production, various data points of the cable need to be tested to ensure product quality and safe use.

[0003] When testing cables, elongation is one of the important indicators for measuring the cable's mechanical properties. It reflects the degree of deformation that the cable can withstand when subjected to tensile force. By testing the elongation, we can understand the cable's flexibility and tensile strength, and determine whether it meets the usage requirements.

[0004] However, when testing the elongation of stranded cables, the removal of the protective layer at both ends after sampling leads to increased gaps in the stranded cable, resulting in a looser overall structure and decreased measurement accuracy. Furthermore, ordinary clamps are ineffective at holding stranded cables, causing uneven stress distribution and affecting the measurement results. Therefore, we propose a wire elongation testing device. Utility Model Content

[0005] The purpose of this invention is to provide a wire elongation testing device that solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wire elongation testing device includes a detector, a slide rail fixedly mounted on the detector, a slider slidably mounted on the slide rail, and a clamping mechanism provided on both the detector and the slider for individually clamping the wire cores of a multi-core cable.

[0008] An auxiliary mechanism is provided between the detector, the slider, and the slide rail for pre-fixing multi-core cables or clamping ordinary cables.

[0009] Preferably, the clamping mechanism includes two fixing blocks, which are respectively fixedly installed on the slider and the surface of the detector. A housing is fixedly installed on the fixing blocks, and a sliding cavity is opened in the housing. A sliding seat is slidably installed in the sliding cavity.

[0010] Preferably, a rotating block is rotatably installed inside the sliding cavity, and a conical block is fixedly installed at one end of the rotating block, and an inner cavity is formed inside the sliding seat.

[0011] Preferably, the housing has a locking cavity, the sliding seat has a locking groove, a locking block is slidably installed in the locking cavity, and the locking block and the locking groove are adapted to each other.

[0012] Preferably, the conical block is located inside the inner cavity, the inner cavity has a frustum structure, and the distance between the outer surface of the conical block and the inner surface of the inner cavity is always consistent.

[0013] Preferably, the surface of the rotating block is threaded, and the rotating block is threadedly connected to the sliding seat.

[0014] Preferably, the auxiliary mechanism includes two sets of connecting rods, which are respectively fixedly installed on the surface of the slider and the detector. Each connecting rod is fixedly connected to an adjusting seat, and a bidirectional lead screw is rotatably installed inside the adjusting seat. A movable block is threaded onto the surface of the bidirectional lead screw, and a clamping block is fixedly installed at the top of the movable block.

[0015] By employing the above technical solution, this utility model provides a wire elongation testing device that has at least the following beneficial effects:

[0016] (1) By setting up a clamping mechanism, this utility model can clamp each core of the multi-core stranded cable individually and can re-twist the multi-core stranded cable, thereby effectively avoiding the problem of uneven stress in the stranded cable during tensile testing, and effectively improving the accuracy of tensile testing.

[0017] (2) By setting up an auxiliary mechanism, this utility model can not only fix and clamp ordinary wires, but also pre-fix the stranded cable before fixing and clamping it, so as to avoid the cable being too loose and causing deviations when re-stretching, which would affect the test results. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of the clamping mechanism of this utility model;

[0022] Figure 4 This is a partial disassembly diagram of the present invention;

[0023] Figure 5 This is a schematic diagram of the auxiliary mechanism of this utility model.

[0024] In the diagram: 1. Detector; 2. Slide rail; 3. Slider; 4. Clamping mechanism; 5. Auxiliary mechanism;

[0025] 41. Fixed block; 42. Housing; 43. Sliding seat; 44. Inner cavity; 45. Conical block; 46. Sliding cavity; 47. Rotating block; 48. Locking block; 49. Locking cavity; 410. Locking groove;

[0026] 51. Connecting rod; 52. Adjusting seat; 53. Two-way lead screw; 54. Moving block; 55. Clamping block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5 A wire elongation testing device includes a tester 1 for controlling and processing data from tensile tests. A slide rail 2 is fixedly connected to the tester 1, and a slider 3 is slidably mounted on the slide rail 2. The slider 3 can slide along the slide rail 2, thereby performing tensile testing on the cable. A clamping mechanism 4 is provided at one end of both the slider 3 and the slide rail 2 for clamping the cable.

[0029] Please see Figures 2-4 The clamping mechanism 4 includes two fixed blocks 41. One fixed block 41 is fixedly connected to the slider 3, and the other fixed block 41 is fixedly connected to the surface of the detector 1. A housing 42 is fixedly installed on the fixed block 41. A sliding cavity 46 is opened inside the housing 42. A sliding seat 43 is slidably installed on the housing 42 through the sliding cavity 46. The sliding seat 43 has a "T" shaped structure, which makes the sliding seat 43 more stable when it moves along the sliding cavity 46 and will not detach from the sliding cavity 46.

[0030] A rotating block 47 is rotatably mounted inside the sliding cavity 46. A motor is mounted on one end of the rotating block 47, and a conical block 45 is mounted on the other end. The conical block 45 is used to break up the stranded cables, so that each cable is completely separated. An inner cavity 44 is opened inside the sliding seat 43. The inner cavity 44 has a frustum structure. The inner cavity 44 and the conical block 45 form a frustum space with a uniform inner diameter, which facilitates the storage of stranded cables.

[0031] The rotating block 47 has threads on its surface and is adapted to the sliding seat 43. The housing 42 has a fixed cavity 49, and the sliding seat 43 has a slot 410. A locking block 48 is slidably installed in the cavity 49 and is adapted to the slot 410. When the locking block 48 is engaged in the slot 410, it acts as a limit, so that the sliding seat 43 can only slide and cannot rotate. At this time, when the rotating block 47 rotates, it can drive the sliding seat 43 to move along the sliding cavity 46, so that the sliding seat 43 is displaced relative to the conical block 45, so that the distance between the inner cavity 44 and the conical block 45 is reduced until each core of the stranded cable is clamped.

[0032] After the cable is clamped, the locking block 48 is removed, which releases the limit of the sliding seat 43. The sliding seat 43 can rotate with the rotating block 47, which allows the stranded cable to be re-tightened. At the same time, since each cable core is clamped individually, the problem of uneven stress can be effectively avoided, and the accuracy of tensile test can be effectively improved.

[0033] Please see Figure 5 An auxiliary mechanism 5 is provided on the slide rail 2. The auxiliary mechanism 5 includes two adjustment seats 52. One adjustment seat 52 is fixedly connected to the slider 3 through a connecting rod 51, and the other adjustment seat 52 is fixedly connected to one side of the detector 1 through a connecting rod 51. The adjustment seat 52 is slidably connected to the slide rail 2, so that the adjustment seat 52 can follow the slider 3 to move.

[0034] A bidirectional lead screw 53 is rotatably mounted inside the adjusting seat 52. A movable block 54 is threaded onto the surface of the bidirectional lead screw 53, and a clamping block 55 is fixedly mounted on the top of the movable block 54. A handle is fixedly mounted on one end of the bidirectional lead screw 53 to facilitate rotation of the bidirectional lead screw 53. The rotation of the bidirectional lead screw 53 causes the two movable blocks 54 to move relative to or towards each other. The movable blocks 54 cause the clamping block 55 to move synchronously, thereby enabling the clamping block 55 to stably clamp the wire.

[0035] The surface of clamp 55 features a serrated structure and is inlaid with rubber or polyurethane pads to prevent cable slippage or crushing, effectively enhancing stability during clamping. This serves to secure ordinary cables and also pre-fix stranded cables before fixing them, preventing excessive slack that could lead to deviations during re-twisting.

[0036] It should be noted that the working principle of a wire elongation testing device is as follows:

[0037] When the cable to be tested is a common single-core cable, place both ends of the cable between two clamping blocks 55. By turning the handle, the handle drives the bidirectional lead screw 53 to rotate. The rotation of the bidirectional lead screw 53 drives the two movable blocks 54 to move relative to or towards each other. The movable blocks 54 drive the clamping blocks 55 to move synchronously, so that the clamping blocks 55 can stably clamp the cable.

[0038] After the wire is clamped and fixed, the detector 1 is started, causing the slider 3 to move along the slide rail 2, thereby stretching the cable until the cable breaks, and the elongation rate of the wire can be calculated.

[0039] When the cable to be tested is a multi-core twisted cable, insert both ends of the cable into the sliding cavity 46 respectively, so that they contact the conical block 45 and the multi-core twisted cable spreads out on the surface of the conical block 45. By turning the handle, the handle drives the bidirectional lead screw 53 to rotate. The rotation of the bidirectional lead screw 53 drives the two movable blocks 54 to move relative to or towards each other. The movable blocks 54 drive the clamping block 55 to move synchronously, so as to pre-fix the multi-core twisted cable and prevent the twisted cable from spreading out.

[0040] When the motor is started, it drives the rotating block 47 to rotate. Since the locking block 48 is engaged in the locking slot 410, it plays a limiting role, so that the sliding seat 43 can only slide and cannot rotate. At this time, when the rotating block 47 rotates, it can drive the sliding seat 43 to move along the sliding cavity 46, so that the sliding seat 43 is displaced relative to the conical block 45, thereby reducing the distance between the inner cavity 44 and the conical block 45 until each core of the stranded cable is clamped.

[0041] After clamping, release clamping block 55, start the motor to drive rotating block 47 to drive conical block 45 and sliding seat 43 to rotate synchronously, thereby re-twisting the stranded cable and avoiding stress dispersion caused by loose twisting between cables. Finally, start the testing instrument 1 to perform a tensile test on the stranded cable. Since each cable core is clamped individually, the problem of uneven stress can be effectively avoided, and the accuracy of tensile test can be effectively improved.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wire elongation testing device, comprising a detector (1), wherein a slide rail (2) is fixedly mounted on the detector (1), and a slider (3) is slidably mounted on the slide rail (2), characterized in that: Both the detector (1) and the slider (3) are equipped with clamping mechanisms (4) for individually clamping the cores of the multi-core cable. An auxiliary mechanism (5) is provided between the detector (1), the slider (3) and the slide rail (2) for pre-fixing multi-core cables or clamping ordinary cables.

2. The wire elongation testing device of claim 1, wherein: The clamping mechanism (4) includes two fixing blocks (41), which are respectively fixedly installed on the surface of the slider (3) and the detector (1). A housing (42) is fixedly installed on the fixing block (41), and a sliding cavity (46) is opened in the housing (42). A sliding seat (43) is slidably installed in the sliding cavity (46).

3. A wire elongation testing device according to claim 2, wherein: A rotating block (47) is rotatably installed inside the sliding cavity (46), and a conical block (45) is fixedly installed at one end of the rotating block (47). An inner cavity (44) is opened inside the sliding seat (43).

4. The wire elongation testing device of claim 2, wherein: The housing (42) has a card cavity (49), the sliding seat (43) has a card groove (410), and a card block (48) is slidably installed in the card cavity (49). The card block (48) and the card groove (410) are compatible with each other.

5. The wire elongation testing device of claim 3, wherein: The conical block (45) is located inside the inner cavity (44), which is a frustum structure, and the distance between the outer surface of the conical block (45) and the inner surface of the inner cavity (44) is always consistent.

6. A wire elongation testing device according to claim 5, wherein: The rotating block (47) has threads on its surface, and the rotating block (47) is threadedly connected to the sliding seat (43).

7. The wire elongation testing device of claim 1, wherein: The auxiliary mechanism (5) includes two sets of connecting rods (51), which are fixedly installed on the surfaces of the slider (3) and the detector (1), respectively. The connecting rods (51) are fixedly connected to the adjusting seat (52), and a bidirectional lead screw (53) is rotatably installed inside the adjusting seat (52). A movable block (54) is threaded on the surface of the bidirectional lead screw (53), and a clamping block (55) is fixedly installed at the top of the movable block (54).

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