Power cable bending test device

Abstract

The invention discloses a power cable bending test device which comprises a base and a fixing assembly, the fixing assembly is arranged on the base, the fixing assembly comprises an annular frame and a clamping piece, the annular frame is provided with a slide way forming a preset moving path, the clamping piece is movably connected to the slide way along the preset moving path, and the clamping piece is used for a cable to penetrate through; the number of the fixing assemblies is two, at least one fixing assembly is movably arranged on the base along the linear moving path, and when one fixing assembly moves along the linear moving path, one fixing assembly is close to or away from the other fixing assembly. When one set of fixing assembly is close to the other set of fixing assembly, the cable is bent at an unfixed angle and is bent at at least three positions. The bending test device not only can perform bending test on the cable at multiple angles and multiple positions, but also can test the tensile state of the cable, and can comprehensively and accurately perform detection test on the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable bending test equipment, and particularly to a power cable bending test device. Background Art

[0002] The cable bending test is an important test for evaluating the mechanical properties of power cables. The main purpose is to ensure that the cable can withstand bending stress without damage during installation and use. Currently, the cable bending test device usually sets the cable between two bending test wheels, and realizes the cable bending test by rotating the test wheels and adjusting the distance between the two test wheels. However, during the infrastructure construction process of power cables, large bending and twisting phenomena will occur simultaneously. Therefore, the current cable bending test device cannot fully meet the bending requirements of cables during infrastructure construction, and the detection is not accurate enough. Summary of the Invention

[0003] The purpose of the present invention is to provide a power cable bending test device to solve the deficiencies in the prior art, which can meet the bending requirements of cables during infrastructure construction and realize large-angle bending tests on cables.

[0004] To achieve one of the above purposes, the present invention provides a power cable bending test device, including: A base, on which a winding guide is provided for winding and towing the cable; A fixing component, which is arranged on the base. The fixing component includes an annular frame and a clamping member. The annular frame is provided with a slideway forming a preset movement path. The clamping member is movably connected to the slideway along the preset movement path. The clamping member has a clamping through groove penetrating along its length direction for threading the cable. The slideway includes a concave portion close to the center of the annular frame and a convex portion far from the center of the annular frame; There are two sets of the fixing components, and at least one set of the fixing components is movably arranged on the base along a linear movement path. When one set of the fixing components moves along the linear movement path, one set of the fixing components approaches or moves away from the other set of the fixing components; The winding guide is arranged on one side of one set of the fixing components facing away from the other set of the fixing components.

[0005] As a further improvement of an embodiment of the present invention, the slideway further includes a buffer portion connecting the concave portion and the convex portion, and the concave portion, the convex portion, and the buffer portion are all arc-shaped.

[0006] As a further improvement of an embodiment of the present invention, the ratio range between the closest distance between the concave portion and the center of the ring frame and the farthest distance between the convex portion and the center of the ring frame is 1:1.5 to 4.

[0007] As a further improvement of an embodiment of the present invention, the ring frame includes: A support disk fixed to the base, and the outer peripheral edge of the support disk is configured as the slideway; A traction rod rotatably connected to the support disk, one end of the traction rod is connected to the center of the support disk, and the other end is connected to the clamping member. The traction rod is provided as a telescopic rod so that the clamping member always fits against the slideway.

[0008] As a further improvement of an embodiment of the present invention, the traction rod includes an outer rod and an inner rod arranged in the axial direction of the traction rod. One end of the outer rod is connected to the center of the support disk, and the other end is provided with a telescopic groove extending in its axial direction. The inner rod slidably penetrates through the telescopic groove, and a spring is arranged in the telescopic groove. One end of the spring is connected to the end of the inner rod, and the other end is connected to the bottom wall of the telescopic groove.

[0009] As a further improvement of an embodiment of the present invention, the clamping member includes an inner clamping sleeve and an outer ring sleeve. The inner clamping sleeve and the outer ring sleeve are arranged in a concentric ring shape, and the inner clamping sleeve is rotatably connected inside the outer ring sleeve. Along the axial direction of the clamping member, at least one end of the inner clamping sleeve extends to the outside of the outer ring sleeve, and a transmission gear ring is arranged on the outer peripheral edge of the inner clamping sleeve located outside the outer ring sleeve; a driving gear ring is arranged on the outer peripheral edge of the support disk, and the transmission gear ring meshes with the driving gear ring.

[0010] As a further improvement of an embodiment of the present invention, the power cable bending test device further includes an auxiliary component. The auxiliary component is arranged between two groups of the fixing components. The auxiliary component includes a penetrating block rotatably arranged on the base, and a through hole for the cable to pass through is arranged on the penetrating block.

[0011] As a further improvement of an embodiment of the present invention, the penetrating block is arranged as a long strip-shaped prism, and the through hole extends along the length direction of the penetrating block.

[0012] As a further improvement of an embodiment of the present invention, the auxiliary component further includes a fixing block provided with a receiving groove. The penetrating block is rotatably arranged in the receiving groove, and a space for accommodating the cable is left between the outer peripheral edge of the penetrating block and the side wall of the receiving groove on the rotation path of the penetrating block.

[0013] As a further improvement of an embodiment of the present invention, the threading block is connected with a rotating shaft, the threading block is connected to the fixed block through the rotating shaft, a torsion spring is arranged at the mating part of the rotating shaft and the base, a traction rope is connected between the rotating shaft and the movable fixing component, when the fixing component approaches the threading block, the torsion spring is in a natural state, and the outer peripheral edge of the threading block is close to the side wall of the accommodating groove.

[0014] Compared with the prior art, when one fixing component in the present invention approaches another fixing component, the cable is bent at an unfixed angle, and at least three positions of bending occur (the connection parts of the cable and the clamping members in the two fixing components respectively, and any position of the cable between the two fixing components).

[0015] When the clamping member moves to the positions corresponding to the convex part and the concave part of the slideway, the positions of the cable in the two fixing components are different, and the corresponding bending angles of the cable are also different. When the cable moves to the position of the concave part, the bending angle of the cable between the two fixing components is smaller, realizing a small-angle bending test; when the cable moves to the position of the convex part, the bending angle of the cable between the two fixing components is larger, realizing a large-angle bending test, which can meet the bending requirements of the cable during infrastructure construction.

[0016] Furthermore, when one set of fixing components is far away from another set of fixing components, the cable is in a tensile state. Therefore, the bending test device of the present invention can not only perform bending tests on the cable at multiple angles and multiple positions, but also test the tensile state of the cable, and can comprehensively and accurately detect the cable. Description of the Drawings

[0017] Figure 1 is the front view of a power cable bending test device provided by the present invention; Figure 2 is the front view of the fixing component in a power cable bending test device provided by the present invention; Figure 3 is the side view of the fixing component in an embodiment of a power cable bending test device provided by the present invention, wherein the clamping member is in a sectional view; Figure 4 is the side view of the fixing component in another embodiment of a power cable bending test device provided by the present invention; Figure 5 is the sectional view of the clamping member and the traction rod in a power cable bending test device provided by the present invention; Figure 6 is the axonometric view of the auxiliary component in the first state in a power cable bending test device provided by the present invention; Figure 7It is a top view of the auxiliary component in the second state in a power cable bending test device provided by the present invention.

[0018] Reference numerals: 100, cable; 10, base; 20, first fixing component; 21, ring frame; 211, slideway; 2111, concave part; 2112, convex part; 2113, buffer part; 212, support disk; 213, traction rod; 2131, outer rod; 2132, inner rod; 2133, telescopic groove; 2134, spring; 214, connecting seat; 215, driving gear ring; 22, clamping piece; 221, clamping through groove; 222, inner clamping sleeve; 223, outer ring sleeve; 224, transmission gear ring; 30, second fixing component; 40, winding guide frame; 50, auxiliary component; 51, penetrating block; 511, through hole; 52, fixing block; 521, accommodating groove; 53, rotating shaft; 54, traction rope; 55, torsion spring. Detailed implementation manners

[0019] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] Spatial relative position terms such as "upper", "above", "lower", "below", etc. used in this implementation manner are for the purpose of facilitating description to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The spatial relative position terms may be intended to include different orientations of the device in addition to the orientation shown in the drawings during use or operation. For example, "upper", "lower", "left", "right", "horizontal", and "vertical" in this embodiment are all the spatial relative position relationships of the power cable bending test device in the normal use state.

[0021] The terms first, second, third, fourth, etc. in the present invention are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features; in addition, it should be noted that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, connection can be direct connection or indirect connection through an intermediate medium, and can be fixed connection, movable connection, detachable connection or integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the length direction of the bending test device is defined as the first direction, the width direction is defined as the second direction, the height direction is defined as the third direction, the first direction is perpendicular to the second direction, and the first direction and the second direction are perpendicular to the third direction.

[0023] The following will describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings Figures 1 to 7 clearly and completely.

[0024] An embodiment of the present invention provides a power cable bending test device for performing a bending test on a power cable. Of course, it can also be used to test other line products that require a bending test.

[0025] Referring to Figure 1 , the power cable bending test device includes a base 10 and a fixing component, and the fixing component is arranged on the base 10.

[0026] The base 10 is, for example, arranged as a plate-shaped or block-shaped support structure, or can also be arranged as a workbench or the like.

[0027] The fixing component includes a ring frame 21 and a clamping member 22. The ring frame 21 is provided with a slideway 211 forming a preset movement path. The clamping member 22 is movably connected to the slideway 211 along the preset movement path, that is, the clamping member 22 is configured to move on the slideway 211. The clamping member 22 has a clamping through groove 221 penetrating along its length direction, and the clamping through groove 221 is used for threading and fixing the cable 100.

[0028] In some embodiments, the clamping member 22 is arranged as a long cylindrical structure, and the clamping through groove 221 extends along the axial direction of the clamping member 22.

[0029] In some embodiments, the side wall of the clamping through groove 221 or both ends of the clamping member 22 are provided with structures for clamping the cable 100, such as elastic engaging members or clamping plates that are adjustable in position in the radial direction of the clamping member 22.

[0030] There are two sets of fixing components, and the two sets of fixing components are arranged opposite to each other. At least one of the two sets of fixing components is movably arranged on the base 10 along a linear movement path. The two sets of fixing components are respectively called the first fixing component 20 and the second fixing component 30.

[0031] In some embodiments, one of the two sets of fixing components is movably arranged on the base 10 along a linear movement path. When one of the two sets of fixing components moves along the linear movement path, one of the two sets of fixing components approaches or moves away from the other set of fixing components. As an example, the first fixing component 20 is slidably arranged on the base 10, and the second fixing component 30 is fixedly arranged on the base 10.

[0032] In some embodiments, the two sets of fixing components are respectively movably arranged on the base 10 along a linear movement path, and the moving directions of the two sets of fixing components are arranged in opposite directions. As an example, the first fixing component 20 and the second fixing component 30 are respectively slidably arranged on the base 10. The linear movement path extends along the first direction.

[0033] When the first fixed component 20 moves on the linear movement path, the first fixed component 20 reciprocates in the direction of approaching or moving away from the second component. Alternatively, when the first fixed component 20 and the second fixed component 30 move towards or away from each other on the linear movement path, the first fixed component 20 and the second fixed component 30 approach each other or the first fixed component 20 and the second fixed component 30 move away from each other.

[0034] When the first fixed component 20 approaches the second fixed component 30, the cable 100 is bent at an unfixed angle and is bent at least at three positions (the connection between the cable 100 and the clamping member 22 on the first fixed component 20, the connection between the cable 100 and the clamping member 22 on the second fixed component 30, and any position of the cable 100 between the two fixed components). In the present invention, the bending angle of the cable 100 is 180° to 360°. When the bending angle of the cable 100 is 180°, the cable 100 is in a straight shape. When the bending angle of the cable 100 is 360°, the two sides of the cable 100 at the bending position are in contact or infinitely close to being in contact.

[0035] Furthermore, when the first fixed component 20 moves towards the side away from the second fixed component 30, or when the first fixed component 20 and the second fixed component 30 move synchronously in opposite directions, the cable 100 is in a stretched state. Therefore, the bending test device of the present invention can not only perform bending tests on the cable 100 at multiple angles and multiple positions, but also test the stretched state of the cable 100, and can comprehensively and accurately detect and test the cable 100.

[0036] Among them, the driving of the fixed component can adopt a linear driving structure, such as an electric cylinder, a rack and pinion, or a lead screw, etc. Herein, no specific limitation is made in this embodiment.

[0037] A winding guide 40 is provided on the base 10, and the winding guide 40 is used for winding and pulling the cable 100. Among them, the winding guide 40 includes a vertical rod and a winding wheel rotatably provided on the vertical rod, and the cable 100 is wound on the winding wheel. The winding guide 40 is provided on one side of one set of fixed components facing away from the other set of fixed components.

[0038] In some embodiments, only one set of winding guides 40 is provided. Exemplarily, the winding guide 40 is provided on the side of the first fixed component 20 facing away from the second fixed component 30.

[0039] In some embodiments, two sets of winding guides 40 are provided, and the two sets of winding guides 40 are respectively provided on the sides of the two sets of fixed components facing away from each other.

[0040] During the movement of the fixed component, the cable 100 can be released or tightened accordingly, enabling the fixed component to drive the cable 100 to smoothly conduct a winding test.

[0041] Referring to Figure 2 , the ring frame 21 includes a support disk 212 which is fixed on the base 10, and the axial direction of the support disk 212 extends along the first direction. The outer peripheral edge of the support disk 212 is configured as a slideway 211, that is, the clamping member 22 cooperates with the outer peripheral edge of the support disk 212, and the clamping member 22 can move along a preset movement path formed by the outer peripheral edge of the support disk 212. A connecting seat 214 can be slidably arranged on the base 10 along a linear movement path, and the support disk 212 is fixedly connected to the connecting seat 214.

[0042] The support disk 212 can be set as a disk shape or a truncated disk shape.

[0043] In some embodiments, referring to Figure 3 , when the support disk 212 is set as a disk-shaped structure, the slideway 211 extends along the arc direction, and the arc is set as a positive arc.

[0044] In some embodiments, referring to Figure 4 , the support disk 212 is set as a truncated disk shape.

[0045] The so-called truncated disk can be understood as a part of the structure in a perfect circle. At least part of the outer peripheral edge of the truncated disk is inscribed in a perfect circle, and the projection of the remaining part of the outer peripheral edge along the axial direction is located within the perfect circle. The truncated disk is set as a special-shaped structure. Specifically, the shape of the support disk 212 can be specifically set according to the specific bending test angle required for the cable 100.

[0046] As an example, in this embodiment, the support disk 212 is set as a truncated disk. In the radial direction, a part of the support disk 212 bulges outward, and a part of it sinks inward. That is, the slideway 211 includes an inner concave part 2111 close to the center of the ring frame 21, an outer convex part 2112 far from the center of the ring frame 21, and a buffer part 2113 connecting the inner concave part 2111 and the outer convex part 2112. The inner concave part 2111, the outer convex part 2112, and the buffer part 2113 are all arc-shaped.

[0047] The distance between the inner concave part 2111 and the center of the ring frame 21 is less than the distance between the outer convex part 2112 and the center of the ring frame 21. The buffer part 2113 is an arc connecting the inner concave part 2111 and the outer convex part 2112. The ratio range between the shortest distance L1 between the inner concave part 2111 and the center of the ring frame 21 and the farthest distance L2 between the outer convex part 2112 and the center of the ring frame 21 is 1:1.5 - 4.

[0048] The larger the ratio between the shortest distance L1 between the concave portion 2111 and the center of the ring frame 21 and the longest distance L2 between the convex portion 2112 and the center of the ring frame 21, the larger the bending angle of the cable 100 in the state where the two fixing components are away from each other.

[0049] Wherein, the center of the ring frame 21 and the center of the support disc 212 are the same center point, and this center point is set as the geometric center of the support disc 212. If the support disc 212 is set as a regular disc, the geometric center is the center of the circle of the support disc 212; if the support disc 212 is set as a defective disc, the geometric center is the center of the largest circumscribed circle of the support disc 212.

[0050] In some embodiments, the concave portion 2111 and the convex portion 2112 are respectively arranged at two ends in the radial direction of the support disc 212.

[0051] In some embodiments, the orientations of the support discs 212 in the two fixing components are set to be centrosymmetric, that is, in the horizontal direction, the convex portion 2112 of the support disc 212 in the first fixing component 20 corresponds to the concave portion 2111 of the support disc 212 in the second fixing component 30, and the concave portion 2111 of the support disc 212 in the first fixing component 20 corresponds to the convex portion 2112 of the support disc 212 in the second fixing component 30.

[0052] Therefore, when the two clamping members 22 respectively move to the positions of the convex portions 2112 of the two support discs 212, in the state where the first fixing component 20 and the second fixing component 30 are away from each other, the cable 100 can achieve a tensile state at a certain angle, and moreover, the bending angle of the cable is larger, so that the tensile test of the cable 100 in the bent state can be realized, which can meet the bending requirements of the cable during infrastructure construction and achieve a large-angle bending test of the cable. Since the concave portion 2111 is closer to the center point of the ring frame 21, it is convenient for the operator to thread the cable 100.

[0053] In the cable bending test device provided by the present invention, when the two clamping members 22 move to the positions corresponding to the convex portion 2111 and the concave portion 2112 of the slideway 211, the positions of the cable 100 in the two fixing components are different, and the corresponding bending angles of the cable 100 are also different. When the two clamping members 22 move to the position of the concave portion 21122, the bending angle of the cable 100 between the two fixing components is smaller, realizing a small-angle bending test; when the two clamping members 22 move to the position of the convex portion 2111, the bending angle of the cable 100 between the two fixing components is larger, realizing a large-angle bending test, which can meet the bending requirements of the cable 100 during infrastructure construction.

[0054] In some embodiments, the concave portion 2111 and the convex portion 2112 on the support discs 212 in the two fixing components correspond to each other in the horizontal direction.

[0055] Referring to Figure 5 , the ring frame 21 further includes a towing rod 213. The towing rod 213 is rotatably connected to the support disk 212. One end of the towing rod 213 is connected to the center of the support disk 212, and the other end is connected to the clamping member 22.

[0056] In some embodiments, a rotating shaft is rotatably connected to the center position of the support disk 212, and one end of the towing rod 213 is fixedly connected to the rotating shaft. The rotating shaft can be driven to rotate by a driving motor and a gear structure, or other structures for realizing mechanical rotation, which are not described in detail in this embodiment.

[0057] It should be noted that the driving of the towing rods 213 in the two sets of fixing components is independent driving, that is, the rotation angles of the two towing rods 213 can be the same or different, and the specific rotation angle of the towing rod 213 is configured according to the specific test angle required by the cable 100.

[0058] The towing rod 213 is set as a telescopic rod so that the clamping member 22 always fits on the slideway 211. The towing rod 213 is, for example, set as a round rod or a square rod.

[0059] The towing rod 213 includes an outer rod 2131 and an inner rod 2132. The outer rod 2131 and the inner rod 2132 are arranged along the axial direction of the towing rod 213. One end of the outer rod 2131 is connected to the center of the support disk 212, and the other end is provided with a telescopic groove 2133 extending along its axial direction, that is, one end of the outer rod 2131 facing the center of the support disk 212 is fixedly connected to the rotating shaft, and the telescopic groove 2133 at the other end is open towards the inner rod 2132.

[0060] The inner rod 2132 slidably penetrates through the telescopic groove 2133. A spring 2134 is arranged in the telescopic groove 2133. One end of the spring 2134 is connected to the end of the inner rod 2132, and the other end is connected to the bottom wall of the telescopic groove 2133. When the towing rod 213 drives the clamping member 22 to move to the position of the concave portion 2111, the spring 2134 is in the first stretched state. When the towing rod 213 drives the clamping member 22 to move to the position of the convex portion 2112, the spring 2134 is in the second stretched state. The elastic potential energy of the spring 2134 in the second stretched state is greater than the elastic potential energy of the spring 2134 in the first stretched state.

[0061] Under the action of the elastic potential energy of the spring 2134, the clamping member 22 can always fit on the outer peripheral edge of the support disk 212, that is, the towing rod 213 can drive the clamping member 22 to always cooperate with the slideway 211. During the displacement of the two sets of fixing components, the clamping member 22 can displace on the incomplete circular slideway 211 to realize the multi-angle bending test of the cable 100.

[0062] As a further limitation, the clamping member 22 includes an inner clamping sleeve 222 and an outer ring sleeve 223. Both the inner clamping sleeve 222 and the outer ring sleeve 223 are arranged in a long strip shape in a ring. The channel formed by the inner clamping sleeve 222 is the clamping through groove 221. The inner clamping sleeve 222 and the outer ring sleeve 223 are arranged in a concentric ring shape, and the inner clamping sleeve 222 is rotatably connected inside the outer ring sleeve 223. In order to make the connection between the inner clamping sleeve 222 and the outer ring sleeve 223 more reliable, a clamping structure can be provided between the inner clamping sleeve 222 and the outer ring sleeve 223.

[0063] Along the axial direction of the clamping member 22, at least one end of the inner clamping sleeve 222 extends to the outside of the outer ring sleeve 223. As an example, in this embodiment, both ends of the inner clamping sleeve 222 extend to the outside of the outer ring sleeve 223. In an alternative embodiment, only one end of the inner clamping sleeve 222 extends to the outside of the outer ring sleeve 223.

[0064] A transmission gear ring 224 is provided on the outer peripheral edge of the inner clamping sleeve 222 located outside the outer ring sleeve 223, that is, transmission gear rings 224 are respectively fixedly connected to both ends of the inner clamping sleeve 222. A driving gear ring 215 is provided on the outer peripheral edge of the support disk 212, and the transmission gear ring 224 meshes with the driving gear ring 215. Correspondingly, two parallel support disks 212 are provided in each set of fixing components. The two support disks 212 are spaced apart, and the distance between the two transmission gear rings 224 is the same as the distance between the two support disks 212, so that the two transmission gear rings 224 match the transmission gear rings 224 on the two support disks 212.

[0065] During the process of the traction rod 213 driving the clamping member 22 to rotate, the transmission gear ring 224 will rotate under the meshing action of the driving gear ring 215. The transmission gear ring 224 drives the inner clamping sleeve 222 to rotate, and the clamping member 22 realizes self-rotation during the revolution. The inner clamping sleeve 222 drives the cable 100 to rotate.

[0066] In some embodiments, the pitch of the teeth of the transmission gear ring 224 and the driving gear ring 215 in the two sets of fixing components is different, so that the self-rotation angles of the cables 100 in the two sets of fixing components are different, and the cable 100 can be twisted. It is possible to synchronously test whether there are quality problems such as power transmission in the twisted state of the cable 100, and the detection of the cable 100 is more accurate.

[0067] In some embodiments, the pitch of the teeth of the transmission gear ring 224 and the driving gear ring 215 in the two sets of fixing components is the same. When the clamping members 22 on the two sets of fixing components move to different positions, the cable 100 can also be twisted at different angles at the holding positions of the two clamping members 22 to test the twisted state of the cable 100.

[0068] As a further limitation, refer to Figure 1 、 Figures 6 to 7, the power cable bending test device further includes an auxiliary component 50. The auxiliary component 50 is disposed between two sets of fixing components. The auxiliary component 50 includes a threading block 51. The threading block 51 is rotatably disposed on the base 10, and a through hole 511 for the cable 100 to pass through is provided on the threading block 51. The threading block 51 can bend the cable 100 between the two sets of fixing components to perform a more comprehensive and accurate bending test on the cable 100.

[0069] Referring to Figure 6 , the threading block 51 is set as a long strip-shaped prism. The through hole 511 extends along the length direction of the threading block 51. The edges at both ends of the threading block 51 are both folding surfaces. The cable 100 is threaded through the threading block 51. After the threading block 51 rotates, the cable 100 will be bent and wound around the outer peripheral edge of the threading block 51. Since the edge of the threading block 51 is set as a folding surface, the bending angle of the cable 100 is also a continuous right angle, so as to realize the test of the cable 100 under continuous multiple bends.

[0070] The auxiliary component 50 further includes a fixing block 52. The fixing block 52 is fixedly disposed on the base 10. The fixing block 52 is provided with a receiving groove 521. The threading block 51 is rotatably disposed in the receiving groove 521. A space for accommodating the cable 100 is left between the outer peripheral edge of the threading block 51 and the side wall of the receiving groove 521 on the rotation path of the threading block 51. During the process of the threading block 51 driving the cable 100 to rotate, the cable 100 will fit more closely to the outer peripheral edge of the threading block 51 under the limiting action of the receiving groove 521, making the detection test more accurate.

[0071] The threading block 51 is connected with a rotating shaft 53. The threading block 51 is connected to the fixing block 52 through the rotating shaft 53. A torsion spring 55 is disposed at the mating portion of the rotating shaft 53 and the base 10. A support block (not labeled) for supporting the auxiliary component 50 can be provided on the base 10. The rotating shaft 53 is rotatably connected to the support block. A torsion spring 55 is disposed at the mating portion of the rotating shaft 53 and the support block. A traction rope 54 is connected between the rotating shaft 53 and the movable fixing component. When the fixing component approaches the threading block 51, the torsion spring 55 is in a natural state, and the outer peripheral edge of the threading block 51 is close to the side wall of the receiving groove 521.

[0072] A card slot for cooperating with one end of the torsion spring 55 can be provided on the support block, and a clamping protrusion for cooperating with the other end of the torsion spring 55 can be provided on the rotating shaft 53. When the rotating shaft 53 rotates under the traction force of the traction rope 54, the torsion spring 55 is subjected to a torsional force. After the traction rope 54 is released, the rotating shaft 53 rotates and resets under the elastic torsional force of the torsion spring 55. Therefore, during the movement of the fixing component, the threading block 51 can drive the cable 100 to perform reciprocating bending.

[0073] In some embodiments, if only one set of movable fixing components is provided, for example, the first fixing component 20 is set to be movable, one end of the traction rope 54 is fixedly connected to the connecting seat 214 in the first fixing component 20, and the other end is fixedly connected to the side surface of the rotating shaft.

[0074] In some embodiments, if both sets of fixing components are set to be movable, two traction ropes 54 are provided. The two traction ropes 54 are respectively connected between the first fixing component 20 and the rotating shaft 53, and between the second fixing component 30 and the rotating shaft 53. Among them, the winding directions of the two traction ropes 54 around the rotating shaft 53 are opposite to avoid the traction interference of the two traction ropes 54 when the two sets of fixing components are displaced synchronously.

[0075] It should be noted that in the natural state of the torsion spring 55, at least a part of the traction rope 54 is wound around the outer peripheral wall of the rotating shaft 53 so that the fixing component can smoothly drive the rotating shaft 53 to rotate during the movement.

[0076] In some embodiments, the auxiliary component 50 is movably arranged on the base 10. For example, the auxiliary component 50 can be arranged on a bidirectional driving structure extending in the width direction and the height direction so that the auxiliary component 50 can be displaced in the second direction and the third direction. When the auxiliary component 50 is displaced in the second direction, the avoidance of the auxiliary component 50 and the fixing component can be selectively realized. The bending test of the cable 100 can be carried out only by using the two sets of fixing components, or the bending test can be carried out synchronously by using the two sets of fixing components and the auxiliary component 50. When the auxiliary component 50 is displaced in the third direction, the angle between the cable 100 and the clamping member 22 can be adjusted to further realize the multi-angle bending test of the cable 100.

[0077] In some embodiments, the rotation drive of the rotating shaft 53 is independent of the displacement of the fixing component. A driving motor can be arranged on the base 10, and the driving motor drives the rotating shaft 53 to rotate through transmission parts (such as gears, pulleys, etc.).

[0078] The following makes a detailed description of the bending test process of the bending test device for the power cable 100 of the present invention: Adjust the two fixing components to the initial position, and the initial position can be the middle position of the linear movement path. The cable 100 is sequentially passed through and fixed to the clamping member 22 of the first fixing component 20, the passing block 51, and the clamping member 22 of the second fixing component 30. A certain length is reserved on both sides of the cable 100 located on the opposite sides of the two fixing components, and the reserved cable 100 can be wound on the winding wheel.

[0079] Drive the fixed component to move along the straight-line moving path. When the two sets of fixed components approach each other, the cable 100 will bend at the position of the clamping member 22 of the first fixed component 20, at the position of the clamping member 22 of the second fixed component 30, and at the intermediate position between the two sets of fixed components. Bending tests can be performed on multiple positions of the cable 100 simultaneously. When the two sets of fixed components move away from each other, the cable 100 will be stretched under the action of the traction force, and a tensile test can be performed on the cable 100.

[0080] During the process of the displacement of the driving component, synchronously drive the traction rod 213 to rotate. The traction rod 213 drives the clamping member 22 to displace on the slideway 211. During the displacement process, the clamping member 22 will drive the cable 100 to rotate circumferentially. The rotation angles of the two sets of fixed components are different, causing the cable 100 to twist, and a torsion test can be performed on the cable 100.

[0081] When the two sets of fixed components move away from the threading block 51, the traction rope 54 will generate a traction force on the rotating shaft 53, causing the rotating shaft 53 to rotate. The threading block 51 drives the cable 100 to rotate, and the cable 100 cooperates with the outer peripheral edge of the threading block 51 and the receiving groove 521, so as to further perform a bending test on the cable 100 between the two sets of fixed components.

[0082] The structure, features and effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above is only the preferred embodiment of the present invention, but the present invention is not limited to the scope shown in the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, still within the spirit covered by the specification and drawings, shall be within the protection scope of the present invention.

Claims

1. A power cable bending test device, characterized in that: include: A base (10), wherein a winding guide frame (40) is provided on the base (10) for winding and pulling the cable; A fixing assembly, the fixing assembly being arranged on the base (10), the fixing assembly comprising a ring frame (21) and a clamping member (22), the ring frame (21) being provided with a slideway (211) forming a preset moving path, the clamping member (22) being movably connected to the slideway (211) along the preset moving path, the clamping member (22) having a clamping through groove (221) penetrating along its length direction for passing a cable (100), the slideway (211) comprising an inner concave portion (2111) close to the center of the ring frame (21) and an outer convex portion (2112) away from the center of the ring frame (21); The fixing components are provided in two groups, at least one of which is movably provided on the base (10) along a linear moving path, and when one of the fixing components moves along the linear moving path, one of the fixing components approaches or moves away from the other fixing component. The winding guide frame (40) is arranged on a side of one group of the fixing components facing away from the other group of the fixing components.

2. The power cable bending test device according to claim 1, characterized in that: The slideway (211) further comprises a buffer portion (2113) connecting the inner recessed portion (2111) and the outer protruding portion (2112); the inner recessed portion (2111), the outer protruding portion (2112) and the buffer portion (2113) are all arranged in an arc shape.

3. The power cable bending test device according to claim 2, characterized in that: The ratio of the shortest distance between the inner concave portion (2111) and the center of the ring frame (21) to the farthest distance between the outer convex portion (2112) and the center of the ring frame (21) is in the range of 1:1.5-4.

4. The power cable bending test device according to claim 1, characterized in that: The ring frame (21) comprises: A support plate (212) is fixed to the base (10), and the outer periphery of the support plate (212) is configured as the slideway (211); A traction rod (213) is rotatably connected to the support plate (212), one end of the traction rod (213) is connected to the center of the support plate (212), and the other end is connected to the clamping member (22), and the traction rod (213) is configured as a telescopic rod so that the clamping member (22) is always in contact with the slideway (211).

5. The power cable bending test device according to claim 4, characterized in that: The traction rod (213) comprises an outer rod (2131) and an inner rod (2132) arranged in the axial direction of the traction rod (213); one end of the outer rod (2131) is connected to the center of the support plate (212); the other end is provided with a telescopic groove (2133) extending along its axial direction; the inner rod (2132) is slidably inserted into the telescopic groove (2133); a spring (2134) is provided in the telescopic groove (2133); one end of the spring (2134) is connected to the end of the inner rod (2132); and the other end is connected to the bottom wall of the telescopic groove (2133).

6. The power cable bending test device according to claim 4, characterized in that: The clamping member (22) includes an inner sleeve (222) and an outer ring sleeve (223), wherein the inner sleeve (222) and the outer ring sleeve (223) are arranged in a concentric ring shape, and the inner sleeve (222) is rotatably connected to the outer ring sleeve (223). Along the axial direction of the clamping member (22), at least one end of the inner sleeve (222) extends to the outside of the outer ring sleeve (223), and a transmission gear ring (224) is arranged on the outer periphery of the inner sleeve (222) located on the outer side of the outer ring sleeve (223); a drive gear ring (215) is arranged on the outer periphery of the support plate (212), and the drive gear ring (224) is meshed with the drive gear ring (215).

7. The power cable bending test device according to claim 1, characterized in that: The power cable bending test device further comprises an auxiliary component (50), wherein the auxiliary component (50) is arranged between the two groups of the fixed components, and the auxiliary component (50) comprises a penetration block (51), wherein the penetration block (51) is rotatably arranged on the base (10), and the penetration block (51) is provided with a through hole (511) for the cable (100) to pass through.

8. The power cable bending test device according to claim 7, characterized in that: The penetration block (51) is configured as a long strip-shaped prism, and the through hole (511) extends along the length direction of the penetration block (51).

9. The power cable bending test device according to claim 7 or 8, characterized in that: The auxiliary component (50) further comprises a fixing block (52), wherein the fixing block (52) is provided with a receiving groove (521), and the insertion block (51) is rotatably disposed in the receiving groove (521), and on the rotation path of the insertion block (51), a space for receiving the cable (100) is reserved between the outer periphery of the insertion block (51) and the side wall of the receiving groove (521).

10. The power cable bending test device according to claim 9, characterized in that: The penetration block (51) is connected to a rotating shaft (53), and the penetration block (51) is connected to the fixed block (52) through the rotating shaft (53). A torsion spring (55) is provided at the matching position between the rotating shaft (53) and the base (10). A traction rope (54) is connected between the rotating shaft (53) and the movable fixed component. When the fixed component is close to the penetration block (51), the torsion spring (55) is in a natural state, and the outer peripheral edge of the penetration block (51) is close to the side wall of the accommodating groove (521).

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