A cable withstand voltage performance detection device

Abstract

The present invention relates to the technical field of cable detection, and specifically provides a cable withstand voltage performance detection device, including: a base, a downward pressing and deforming mechanism, an end clamping and withstand voltage detection mechanism, and an end clamping and energizing mechanism. Through the cooperation of the downward pressing and deforming mechanism, the end clamping and energizing mechanism, and the end clamping and withstand voltage detection mechanism, the present invention simultaneously performs the withstand voltage performance detection of multiple cables under mechanical stress, and adjusts the length of the cables under extrusion through the cooperation of the pressure-supplementing surface group and the pressure block, so as to detect the cable transmission under different extrusion deformation lengths, enrich the withstand voltage performance detection data of the cables, and obtain a more accurate average value of the detection data, which not only ensures the accuracy of the detection results, but also can comprehensively evaluate the withstand voltage performance and electrical stability of the cables in actual use.

Description

Technical Field

[0001] The invention relates to the technical field of cable detection, and specifically proposes a cable withstand voltage performance detection device. Background Art

[0002] A cable is a wire used to transmit electrical energy or signals. It is usually composed of one or more conductors (such as copper or aluminum) and is wrapped in insulating materials. In certain environments, such as airplanes, trains, ships and other transportation vehicles, cables may be vibrated, bent and squeezed. The conductor of the cable (usually copper or aluminum) is easily flattened under the action of the squeezing force, and the change in the shape of the conductor may change the path of the current, which may increase the voltage drop of the cable and affect the conductivity, especially in long-distance transmission or high-resistance conditions. It is easy to have a negative impact on the voltage transmission capacity of the cable. In addition, the different lengths of flattening of the cable have different effects on the voltage transmission capacity of the cable. Therefore, there is an urgent need for a cable withstand voltage performance testing device to comprehensively evaluate the withstand voltage performance and electrical stability of the cable when it is subjected to mechanical force during actual use. Summary of the invention

[0003] In view of the above problems, an embodiment of the present application provides a cable voltage withstand performance testing device to solve the technical problems in the related art.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: a cable pressure resistance performance testing device, comprising: a base, a fixing seat with a concave vertical cross-section is installed on the top of the base, and a circular supporting seat located above the fixing seat is installed on the outer wall of the fixing seat through a plurality of supporting legs, the supporting seat has a concave vertical cross-section and a circular through hole in the middle, the supporting legs are a hollow structure, and a downward pressure deformation mechanism for squeezing the cable is installed on the top of the base.

[0005] An annular groove is provided on the top of the fixing seat, an end clamping power-on mechanism is installed in the annular groove, an end clamping withstand voltage detection mechanism is installed on the supporting seat, two ends of the cable are respectively fixed on the end clamping power-on mechanism and the end clamping withstand voltage detection mechanism, and the cable is in an inverted L shape after passing through the circular through hole, and a limiting group is installed on the supporting seat for limiting multiple horizontal sections of the cables arranged along the circumference of the supporting seat.

[0006] The side wall of the supporting seat is provided with evenly arranged voltage detectors (such as voltmeter, oscilloscope, digital multimeter, etc.), and the end clamping power-on mechanism cooperates with the end clamping withstand voltage detection mechanism to fix the two ends of the cable respectively and connect them in series with the power supply and the load (to avoid short circuit caused by direct connection of the two ends of the cable with the positive and negative poles of the power supply. At this time, the voltage detector is connected in parallel with the two ends of the cable to detect the state of the transmission voltage of the cable). The two ends of each cable are connected in series with a separate power supply and load, and in parallel with a separate voltage detector.

[0007] The limiting group includes a groove formed at the top of the round through hole, a limiting wheel is rotatably connected in the groove, and a wire clamping seat corresponding to the limiting wheel is installed on the supporting seat.

[0008] In one possible implementation, in one possible implementation, the end clamping power-carrying mechanism includes a power-carrying wire installed on the inner ring surface of a fixed seat and arranged evenly along its circumference, and a metal clamping plate corresponding to and connected to the power-carrying wire is installed on the side wall of the annular groove close to the power-carrying wire, and the other side wall of the annular groove is connected to a push rod that slides along its radial direction and corresponds to the metal clamping plate one by one, the push rod is made of insulating material, and a metal pressure plate corresponding to the metal clamping plate is installed on the push rod, the metal pressure plate is in a 匚-shaped structure, and an insertion groove is provided on the side wall of the annular groove for plugging and cooperating with the metal pressure plate, and a clamping drive group is installed on the fixed seat for driving multiple push rods to drive the metal pressure plate to move toward the metal clamping plate to clamp the cable end.

[0009] In one possible implementation, the clamping drive group includes a mounting groove with a diameter larger than the annular groove and concentric with the fixed seat. After the push rod passes through the mounting groove, a pressure spring mounted on the push rod is connected to the inner wall of the mounting groove. The push rod is also equipped with a toggle assembly that drives it to move away from the metal clamping plate. After the push rod passes through the mounting groove, it is rollingly connected to a ball, and a rotating ring is rotatably connected in the mounting groove. The inner ring surface of the rotating ring is equipped with wedge blocks corresponding to the push rod one by one, and a rotating locking assembly that drives the rotating ring to rotate and locks the rotating ring is installed on the fixed seat.

[0010] In one possible implementation, the rotary locking assembly includes a supplementary cover installed on the outer wall of the fixed base and connected to the mounting groove, the supplementary cover is connected to a locking screw by a threaded fit, a gear is rotatably connected inside the supplementary cover and is connected to the locking screw by a spline fit, and a gear ring that meshes with the gear is installed on the outer ring surface of the rotating ring.

[0011] In a possible implementation, the toggle assembly includes a waist-shaped groove opened at the top of the mounting groove and corresponding to the push rod, and a toggle rod penetrating the waist-shaped groove is installed at the top of the push rod.

[0012] In a possible implementation manner, the end clamping and pressure-resistant detection mechanism includes an annular cavity formed in the vertical section of the supporting seat. The inner wall of the vertical section of the supporting seat is provided with insertion holes that are evenly arranged along its circumference and communicate with the annular cavity. The bottom of the annular cavity is installed with energized clips that are evenly arranged along its circumference. The bottom of the energized clips is also installed with energized wires. The top of the supporting seat is installed with pull rods that are evenly arranged along its circumference and slide vertically into the annular cavity. The lower end of the pull rod is installed with metal clips. A compression spring sleeved on the pull rod is installed between the metal clip and the top of the annular cavity. An abutting group for abutting against multiple metal clips is also installed in the annular cavity.

[0013] In a possible implementation manner, the abutting group includes a lifting ring that is slidably connected up and down in the annular cavity through a lifting driving source. The inner ring surface of the lifting ring is installed with abutting strips corresponding to the metal clips one by one. The abutting strips are made of insulating materials.

[0014] The downward pressing and deforming mechanism includes a support frame installed on the top of the base. A pressing driving source (such as a hydraulic cylinder) is installed on the support frame. The telescopic end of the pressing driving source is installed with a T-shaped pushing seat. The lower end of the vertical section of the pushing seat is installed with a conical seat whose diameter gradually increases downward and is a cavity structure. The outer wall of the conical seat is installed with downward pressing strips that are evenly arranged along its circumference. An inclined rod is installed between the end of the downward pressing strip far from the conical seat and the vertical section of the pushing seat. The downward pressing strip, the inclined rod and the vertical section of the pushing seat form a triangle. The lower end surface of the downward pressing strip is installed with pressing blocks corresponding to the limiting group one by one.

[0015] In a possible implementation manner, the lower end surfaces of multiple downward pressing strips are jointly and detachably connected with multiple abutting surface supplement groups. The abutting surface supplement groups cooperate with the pressing blocks to adjust the extrusion length of the cable; a unified locking group for installing and locking between the abutting surface supplement groups and the downward pressing strips is installed on the conical seat.

[0016] In a possible implementation manner, the abutting surface supplement group includes an annular frame. The lower end surface of the annular frame is also installed with abutting blocks that are evenly arranged along its circumference. The lower end surface of the downward pressing strip is provided with arc-shaped card slots that are evenly arranged along its length direction. The corresponding arc-shaped card slots on multiple downward pressing strips cooperate to accommodate the annular frame. The abutting blocks along the length distribution of the downward pressing strip and adjacent to each other are inserted and matched through locking components; except for the different diameters of the annular frames, the other structures of multiple abutting surface supplement groups are the same.

[0017] In a possible implementation manner, the locking component includes card seats and card strips installed on both sides of the abutting blocks (except for the abutting blocks on the downward pressing strips) along their length directions. Card seats are installed on both sides of the abutting blocks on the downward pressing strip along their length directions. The card strip on one of the abutting blocks adjacent to each other along the length distribution of the downward pressing strip is clamped and matched with the card seat on the other abutting block.

[0018] In a possible implementation manner, the unified locking group includes a rectangular groove formed in the pressing strip and communicating with a plurality of arc-shaped clamping grooves and penetrating through the conical seat. Slots arranged along the circumferential direction are formed in the annular frame. A locking insert is slidably connected in the rectangular groove. The lower end surface of the conical seat is connected with a lifting rod by means of thread fitting. After the lifting rod penetrates into the conical seat, it is rotatably connected with a fixed disk. A swing rod is hinged between the fixed disk and the locking insert.

[0019] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. By cooperating the downward pressing deformation mechanism with the end clamping and energizing mechanism and the end clamping and voltage withstand detection mechanism, the present invention simultaneously performs the voltage withstand performance detection of multiple cables under mechanical stress, and adjusts the length of the cables under extrusion through the cooperation of the pressing surface supplement group and the pressing block, so as to detect the cable transmission under different extrusion deformation lengths, enrich the voltage withstand performance detection data of the cables, and obtain a more accurate average value of the detection data, which not only ensures the accuracy of the detection results, but also can comprehensively evaluate the voltage withstand performance and electrical stability of the cables in actual use.

[0020] 2. In the present invention, the pressing strip, the inclined rod, the conical seat and the vertical section of the pushing seat form a stable triangular structure, so that the pressure exerted by each pressing strip and the pressing block on the cable below it is the same, thereby improving the consistency of the pressure on multiple cables and further improving the accuracy of the cable voltage withstand performance detection.

[0021] 3. Under the limiting action of multiple limiting groups, multiple cables of the present invention are dispersed on the supporting seat in a circumferentially uniformly arranged manner, and then the ends of the multiple cables are quickly clamped and uniformly locked through the cooperation of the end clamping and energizing mechanism and the end clamping and voltage withstand detection mechanism, greatly improving the efficiency of the cable voltage withstand performance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 2 is a three-dimensional structural schematic diagram of the end clamping and energizing mechanism of the present invention.

[0025] Figure 3 is a three-dimensional structural schematic diagram of the pushing seat, the conical seat, the pressing strip, the inclined rod and the pressing block of the present invention.

[0026] Figure 4 It is a schematic three-dimensional structure diagram of the pressing surface supplement group of the present invention.

[0027] Figure 5 It is Figure 3 and Figure 4 a schematic three-dimensional structure diagram after being assembled and connected.

[0028] Figure 6 It is Figure 5 a partial enlarged view of part A in

[0029] Figure 7 It is Figure 5 a partial cross-sectional view of

[0030] Figure 8 It is Figure 2 a cross-sectional view taken from the top of

[0031] Figure 9 It is Figure 2 a front cross-sectional view of

[0032] Figure 10 It is Figure 9 a partial enlarged view of part B in

[0033] Reference numerals: 1, base; 2, fixed seat; 3, support leg; 4, supporting seat; 5, downward deformation mechanism; 50, support frame; 51, pushing seat; 52, conical seat; 53, downward pressing strip; 54, inclined rod; 55, pressing block; 56, pressing surface supplement group; 560, annular frame; 561, arc-shaped card slot; 580, card seat; 581, card strip; 57, unified locking group; 570, rectangular groove; 571, locking insertion bar; 572, lifting rod; 573, swing rod; 6, annular groove; 7, end clamping and energizing mechanism; 70, metal clamping piece; 71, abutting rod; 72, metal pressing piece; 74, clamping driving group; 740, installation groove; 741, pressing spring; 742, rotating ring; 743, wedge block; 750, supplementary cover; 751, locking screw; 8, end clamping and pressure-resistant detection mechanism; 80, annular cavity; 81, jack; 82, energizing clamping piece; 83, pull rod; 84, metal clamping piece; 85, downward pressing spring; 86, pressing group; 860, lifting ring; 861, pressing strip; 9, limiting group; 90, wire clamping seat; 91, limiting wheel; 10, cable. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Refer to Figure 1 and Figure 2 , a cable withstand voltage performance detection device, comprising: a base 1, a fixing seat 2 with a concave vertical cross-section is installed on the top of the base 1, a circular supporting seat 4 located above the fixing seat 2 is installed on the outer side wall of the fixing seat 2 through a plurality of support legs 3, the supporting seat 4 has a concave vertical cross-section and a circular through-hole is opened in the middle, the support legs 3 are of a hollow structure (connecting wires can pass through the support legs 3, and the internal structure schematic diagram of the support legs 3 is not shown in the figure), and a downward pressing deformation mechanism 5 for pressing the cable 10 is installed on the top of the base 1.

[0037] Refer to Figure 1 and Figure 2 , a circular groove 6 is opened on the top of the fixing seat 2, an end clamping and power-on mechanism 7 is installed in the circular groove 6, an end clamping and withstand voltage detection mechanism 8 is installed on the supporting seat 4, both ends of the cable 10 are respectively fixed on the end clamping and power-on mechanism 7 and the end clamping and withstand voltage detection mechanism 8, and the cable 10 is in an inverted L shape after passing through the circular through-hole. A limiting group 9 for respectively limiting the horizontal sections of a plurality of cables 10 arranged circumferentially along the supporting seat 4 is installed on the supporting seat 4.

[0038] Voltage detectors (such as voltmeters, oscilloscopes, digital multimeters, etc.) are uniformly arranged on the side wall of the supporting seat 4. The end clamping and power-on mechanism 7 and the end clamping and withstand voltage detection mechanism 8 cooperate to respectively fix both ends of the cable 10 and connect them in series with the power supply and the load, avoiding direct connection of both ends of the cable 10 to the positive and negative poles of the power supply to cause a short circuit. At this time, the voltage detectors are connected in parallel with both ends of the cable 10 to detect the voltage transmission state of the cable 10. A separate power supply, load, and a separate voltage detector are connected in series at both ends of each cable 10. When the downward pressing deformation mechanism 5 applies pressure to the cable 10 to flatten it, check whether the voltage transmitted by the flattened cable 10 is affected through the voltage detectors. At the same time, multiple cables 10 are detected, and the average value of the detection results is obtained to ensure the accuracy of the detection results.

[0039] Refer to Figure 1 and Figure 9 , the limiting group 9 includes a groove opened at the top of the circular through-hole, a limiting wheel 91 is rotatably connected in the groove, a wire clamping seat 90 corresponding to the limiting wheel 91 one by one is installed on the supporting seat 4, the limiting wheel 91 is used to support the bending part of the cable 10, and the limiting wheel 91 and the wire clamping seat 90 cooperate to limit the cable 10, avoiding the cable 10 from moving during the extrusion deformation of the cable 10 and affecting the detection accuracy.

[0040] See also Figure 1 , Figure 2 , Figure 8 and Figure 9 The end clamping power-carrying mechanism 7 includes a power-carrying wire installed on the inner ring surface of the fixing seat 2 and arranged uniformly along its circumference. A metal clamping piece 70 corresponding to and connected to the power-carrying wire is installed on the side wall of the annular groove 6 close to the power-carrying wire. The other side wall of the annular groove 6 is connected to a push rod 71 that slides along its radial direction and corresponds to the metal clamping piece 70 one by one. The push rod 71 is made of insulating material. A metal pressing piece 72 corresponding to the metal clamping piece 70 is installed on the push rod 71. The metal pressing piece 72 is in a 匚-shaped structure. An insertion groove that is plugged into and matched with the metal pressing piece 72 is opened on the side wall of the annular groove 6. A clamping drive group 74 that drives multiple push rods 71 ​​to drive the metal pressing piece 72 to move toward the metal clamping piece 70 to clamp the end of the cable 10 is installed on the fixing seat 2.

[0041] The exposed conductor at the end of the cable 10 is inserted between the metal clamping piece 70 and the corresponding metal pressing piece 72. The metal pressing piece 72 pre-clamps and limits the conductor under the elastic pushing action of the clamping drive group 74. After the ends of multiple cables 10 are all clamped and limited by the metal clamping piece 70 and the corresponding metal pressing piece 72, the clamping drive group 74 is used to press the push rod 71, so that the metal pressing piece 72 presses and fixes the conductor of the cable 10 on the metal clamping piece 70. The clamping drive group 74 cooperates with the push rod 71 to achieve unified clamping and locking of the ends of multiple cables 10, thereby improving the convenience of fixing the ends of the cables 10.

[0042] See also Figure 2 , Figure 8 and Figure 9 The clamping drive group 74 includes a mounting groove 740 with a diameter larger than the annular groove 6 and concentric with the mounting seat 2. After the push rod 71 passes through the mounting groove 740, a pressure spring 741 sleeved on the push rod 71 is connected between the push rod 71 and the inner wall of the mounting groove 740. The push rod 71 is also equipped with a toggle assembly that drives it to move away from the metal clamping piece 70. After the push rod 71 passes through the mounting groove 740, it is rollingly connected with a ball. A rotating ring 742 is rotatably connected in the mounting groove 740. The inner ring surface of the rotating ring 742 is equipped with a wedge block 743 corresponding to the push rod 71. A rotating locking assembly for driving the rotating ring 742 to rotate and locking the rotating ring 742 is installed on the fixed seat 2.

[0043] See also Figure 2 , Figure 8 and Figure 9The rotary locking assembly includes a supplementary cover 750 installed on the outer wall of the fixed seat 2 and connected to the mounting groove 740. The supplementary cover 750 is connected to a locking screw 751 by threaded cooperation. A gear connected to the locking screw 751 by spline cooperation is rotatably connected inside the supplementary cover 750. A gear ring that meshes with the gear is installed on the outer ring surface of the rotating ring 742.

[0044] When inserting the conductor of the cable 10, the push rod 71 is first pulled by the toggle assembly to drive the metal pressing piece 72 to move away from the metal clamping piece 70, so that the distance between the metal pressing piece 72 and the metal clamping piece 70 is increased, and then the conductor at the end of the cable 10 is inserted between the two, and then the toggle assembly is released, so that the push rod 71 drives the metal pressing piece 72 to press the conductor of the cable 10 against the metal clamping piece 70 under the elastic force of the pressing spring 741. After the ends of multiple cables 10 are pre-fixed, the lock is turned The fixed screw 751 and the locking screw 751 drive the gear to rotate and move along the axial direction of the gear during the rotation process through the threaded cooperation with the supplementary cover 750. The gear and the gear ring are always meshed. The gear drives the rotating ring 742 to rotate through the meshing transmission with the gear ring during the rotation process. The rotating ring 742 drives the wedge block 743 to press against the ball on the push rod 71 during rotation, thereby realizing unified pressing and locking of multiple push rods 71 ​​and the metal pressing plate 72, which greatly improves the convenience of fixing the conductor of the cable 10.

[0045] See also Figure 2 and Figure 9 The toggle assembly includes a waist-shaped groove corresponding to the push rod 71 opened at the top of the installation groove 740, and a toggle rod penetrating the waist-shaped groove is installed on the top of the push rod 71. The toggle rod pulls the push rod 71 to drive the metal pressing plate 72 to move away from the metal clamping plate 70, so that the distance between the metal pressing plate 72 and the metal clamping plate 70 is increased, so as to facilitate the insertion of the conductor at the end of the cable 10 between the two.

[0046] See also Figure 1 , Figure 9 and Figure 10 The end clamping withstand voltage detection mechanism 8 includes an annular cavity 80 opened on the vertical section of the supporting seat 4, and the inner wall of the vertical section of the supporting seat 4 is provided with jacks 81 which are evenly arranged along its circumference and connected to the annular cavity 80. The bottom of the annular cavity 80 is equipped with energized clips 82 which are evenly arranged along its circumference, and the bottom of the energized clips 82 is also equipped with energized wires. The top of the supporting seat 4 is equipped with a pull rod 83 which is evenly arranged along its circumference and slides up and down into the annular cavity 80, and the lower end of the pull rod 83 is equipped with a metal clip 84, and a downward pressure spring 85 which is sleeved on the pull rod 83 is installed between the metal clip 84 and the top of the annular cavity 80, and a pressing group 86 for pressing multiple metal clips 84 is also installed in the annular cavity 80.

[0047] Refer to Figure 1 、 Figure 9 and Figure 10 Figure 10 , the pressing group 86 includes a lifting ring 860 that is vertically slidably connected in the annular cavity 80 through a lifting drive source. A pressing strip 861 corresponding to the metal clip 84 one by one is installed on the inner ring surface of the lifting ring 860, and the pressing strip 861 is made of insulating material.

[0048] Drive the metal clip 84 connected thereto to move upward through the pull rod 83, the pressing spring 85 contracts, and then insert the conductor at one end of the cable 10 into the jack 81. The conductor of the cable 10 enters between the metal clip 84 and the energized clip 82 through the jack 81. Then release the pull rod 83, so that the metal clip 84 pre-clamps the end of the cable 10 under the elastic force of the pressing spring 85. When the ends of multiple cables 10 are all clamped between the corresponding metal clip 84 and the energized clip 82, drive the lifting ring 860 to move downward through a lifting drive source (such as an electric slider). The lifting ring 860 presses the metal clip 84 and the conductor of the cable 10 through the pressing strip 861, thereby realizing the unified pressing and fixing of the ends of multiple cables 10, and further improving the convenience of fixing the cable 10.

[0049] Special note: Among the energized wires connected to the lower end of the energized clip 82 and the energized wires connected to the metal clamping piece 70, one of the energized wires is directly connected to one pole of the power supply, the other energized wire is connected to the load, the load is connected to the other pole of the power supply, and the voltage detector is connected in parallel at both ends of the cable 10.

[0050] Refer to Figure 1 、 Figure 3 、 Figure 5 and Figure 7 Figure 7 , the downward deformation mechanism 5 includes a support frame 50 installed on the top of the base 1. A pressing drive source (such as a hydraulic cylinder) is installed on the support frame 50. The telescopic end of the pressing drive source is installed with a T-shaped pushing seat 51. A conical seat 52 with a cavity structure and a diameter gradually increasing downward is installed at the lower end of the vertical section of the pushing seat 51. A pressing strip 53 is installed on the outer wall of the conical seat 52 and is evenly arranged along its circumference. An inclined rod 54 is installed between the end of the pressing strip 53 far from the conical seat 52 and the vertical section of the pushing seat 51. The pressing strip 53, the inclined rod 54, the conical seat 52 and the vertical section of the pushing seat 51 form a triangular structure. A pressing block 55 corresponding to the limiting group 9 is installed on the lower end surface of the pressing strip 53.

[0051] After multiple cables 10 are all clamped and energized, the pressing drive source drives the pushing seat 51 and the pressing bar 53 to move downward. The pressing bar 53 presses the cable 10 against the supporting seat 4 through the pressing block 55 and flattens the cable 10. The stable triangular structure formed by the pressing bar 53, the inclined rod 54, the conical seat 52, and the vertical section of the pushing seat 51 makes the pressure exerted by each pressing bar 53 and the pressing block 55 on the cable 10 below it the same, improving the consistency of the pressure on multiple cables 10, enabling each cable 10 to be tested under the same pressure, and thus improving the accuracy of the withstand voltage performance test of the cable 10.

[0052] Refer to Figure 1 、 Figure 3 And Figure 4 ., a plurality of pressing surface supplement groups 56 are detachably connected to the lower end surfaces of the plurality of pressing bars 53 together. The pressing surface supplement group 56 cooperates with the pressing block 55 to adjust the extrusion length of the cable 10, so as to detect the voltage transmitted by the cable 10 under different extrusion deformation lengths, provide multiple groups of test data for the withstand voltage performance test of the cable 10, and further improve the accuracy of the withstand voltage performance test of the cable 10; a unified locking group 57 for installing and locking between the pressing surface supplement group 56 and the pressing bar 53 is installed on the conical seat 52, thereby improving the convenience of adjusting and fixing the flattening length of the cable 10.

[0053] Refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 And Figure 7 ., the pressing surface supplement group 56 includes an annular frame 560. The lower end surface of the annular frame 560 is also provided with pressing blocks 55 arranged uniformly along its circumference. Arc-shaped card slots 561 arranged uniformly along the length direction are formed on the lower end surface of the pressing bar 53. The corresponding arc-shaped card slots 561 on the plurality of pressing bars 53 cooperate to accommodate the annular frame 560, and the adjacent two pressing blocks 55 along the length distribution of the pressing bar 53 are plugged and matched through a locking component; except for the different diameters of the annular frames 560, the other structures of the plurality of pressing surface supplement groups 56 are the same.

[0054] Refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 And Figure 7, the locking assembly includes card seats 580 and card strips 581 installed on both sides of the remaining pressure blocks 55 arranged along their length directions except for the pressure block 55 on the lower pressing strip 53. Card seats 580 are installed on both sides of the pressure block 55 on the lower pressing strip 53 arranged along its length direction. The card strip 581 on one of the two adjacent pressure blocks 55 distributed along the length of the lower pressing strip 53 is in snap-fit connection with the card seat 580 on the other pressure block 55.

[0055] When it is necessary to simulate various flattened lengths of the cable 10 during detection, the pressure surface supplement groups 56 are sequentially added from the inside to the outside. The diameters of the annular frames 560 on the multiple pressure surface supplement groups 56 increase sequentially from the inside to the outside. When installing the pressure surface supplement groups 56, the annular frames 560 are stuck in the corresponding arc-shaped slots 561 on the multiple lower pressing strips 53. At the same time, the corresponding card seats 580 and card strips 581 on the two adjacent pressure blocks 55 distributed along the length of the lower pressing strip 53 are opposite to each other, so as to facilitate the alignment and snap-fit connection of the annular frame 560 and the corresponding arc-shaped slot 561, and then the unified locking group 57 fixes the annular frame 560 on the lower pressing strip 53.

[0056] Refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the unified locking group 57 includes a rectangular slot 570 opened on the lower pressing strip 53 and communicating with and penetrating through the conical seat 52 for all the arc-shaped slots 561. Slots are opened on the annular frame 560 arranged along its circumferential direction. A locking insert 571 is slidably connected in the rectangular slot 570. The lower end surface of the conical seat 52 is connected with a lifting rod 572 by a threaded fit. After the lifting rod 572 penetrates into the conical seat 52, it is rotatably connected with a fixed disk. A swing rod 573 is hinged between the fixed disk and the locking insert 571.

[0057] After the annular frame 560 enters the arc-shaped slot 561, when the two adjacent pressure blocks 55 are locked by the locking assembly, rotate the lifting rod 572. The lifting rod 572 drives the fixed disk to move downward during rotation through the threaded fit with the conical seat 52. The fixed disk pushes the locking insert 571 to move through the swing rod 573. The locking insert 571 is inserted into the slot of the annular frame 560, so as to connect and lock the annular frame 560 in the arc-shaped slots 561 of the multiple lower pressing strips 53. The unified locking group 57 cooperates with the pressure surface supplement group 56 to realize the convenient expansion and adjustment of the pressure surfaces of the multiple cables 10.

[0058] Refer to Figures 1 - 10, during operation, the cable 10 is limited on the supporting seat 4 by the limiting group 9. Under the limiting action of multiple limiting groups 9, multiple cables 10 are dispersed on the supporting seat 4 in a circumferentially uniform arrangement. Then, through the cooperation of the end clamping and energizing mechanism 7 and the end clamping and withstand voltage detecting mechanism 8, the ends of multiple cables 10 can be quickly clamped and uniformly locked, greatly improving the efficiency of the withstand voltage performance detection of the cable 10.

[0059] After multiple cables 10 are all clamped and energized, the pressing drive source drives the pushing seat 51 and the pressing strip 53 to move downward. The pressing strip 53 presses the cable 10 against the supporting seat 4 through the pressing block 55 and flattens the cable 10. The stable triangular structure formed by the pressing strip 53, the inclined rod 54, the conical seat 52, and the vertical section of the pushing seat 51 makes the pressure exerted by each pressing strip 53 and the pressing block 55 on the cable 10 below the same, improving the consistency of the pressure on multiple cables 10. Then, the voltage detector is used to observe whether the transmitted voltage of the flattened cable 10 is affected, and multiple cables 10 are detected simultaneously to obtain the average value of the withstand voltage performance detection results of multiple cables 10, thereby ensuring the accuracy of the detection results.

[0060] When it is necessary to simulate the withstand voltage values of the cable 10 at different flattened lengths, the pressing surface supplement group 56 and the pressing block 55 cooperate to adjust the extrusion length of the cable 10, realizing the detection of the cable 10 at different extrusion deformation lengths and providing multiple groups of detection data for the withstand voltage performance detection of the cable 10.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0062] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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.

[0063] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A cable withstand voltage performance testing device, characterized in that: Including: A base, on the top of the base is installed a fixing seat with a concave vertical cross-section. On the outer sidewall of the fixing seat, a circular supporting seat located above the fixing seat is installed through a plurality of support legs. The vertical cross-section of the supporting seat is concave and a circular through-hole is provided in the middle. On the top of the base is installed a downward pressing deformation mechanism for extruding the cable. On the top of the fixing seat is provided an annular groove, and an end clamping and energizing mechanism is installed in the annular groove. On the supporting seat is installed an end clamping and voltage withstand detection mechanism. After passing through the circular through-hole, the cable is in an inverted L shape. On the supporting seat is installed a limiting group for respectively limiting a plurality of horizontal cable segments arranged along the circumference of the supporting seat. The downward pressing deformation mechanism includes a support frame installed on the top of the base. On the support frame is installed a pressing driving source. The telescopic end of the pressing driving source is installed with a T-shaped pushing seat. At the lower end of the vertical section of the pushing seat is installed a conical seat with a cavity structure whose diameter gradually increases downward. On the outer wall of the conical seat are installed downward pressing strips evenly arranged along its circumference. Between the end of the downward pressing strip far from the conical seat and the vertical section of the pushing seat is installed an inclined rod. The downward pressing strip, the inclined rod and the vertical section of the pushing seat form a triangle. On the lower end surface of the downward pressing strip is installed a pressing block corresponding to the limiting group one by one. The lower end surfaces of a plurality of downward pressing strips are jointly and detachably connected with a plurality of pressing surface supplement groups. The pressing surface supplement groups cooperate with the pressing blocks to adjust the extrusion length of the cable. On the conical seat is installed a unified locking group for locking the installation between the pressing surface supplement groups and the downward pressing strips. The end clamping and energizing mechanism includes energizing wires evenly arranged along the circumference of the inner ring surface of the fixing seat. On the sidewall of the annular groove close to the energizing wires is installed a metal clamping piece corresponding to and connected with the energizing wire one by one. In the annular groove is provided a metal pressing piece corresponding to the metal clamping piece one by one. On the fixing seat is installed a clamping driving group for driving a plurality of metal pressing pieces to move towards the metal clamping pieces to clamp the end of the cable. The end clamping and voltage withstand detection mechanism includes an annular cavity opened on the vertical section of the supporting seat. At the bottom of the annular cavity are installed energizing clamping pieces evenly arranged along its circumference. The bottom of the energizing clamping piece is also installed with an energizing wire. In the annular cavity is provided a metal clamping piece evenly arranged along its circumference. In the annular cavity is also installed a pressing group for pressing a plurality of metal clamping pieces and the end of the cable.

2. A cable withstand voltage performance testing device according to claim 1, characterized in that: On the other sidewall of the annular groove is connected a resisting rod sliding radially and corresponding to the metal clamping piece one by one. The resisting rod is made of insulating material. The metal pressing piece is installed on the corresponding resisting rod. The metal pressing piece is in a U-shaped structure. On the sidewall of the annular groove is provided an insertion slot in plug-in fit with the metal pressing piece. The clamping driving group drives a plurality of resisting rods to drive the metal pressing pieces to move towards the metal clamping pieces to clamp the end of the cable.

3. A cable withstand voltage performance testing device according to claim 1, characterized in that: On the inner wall of the vertical section of the supporting seat are provided insertion holes evenly arranged along its circumference and communicated with the annular cavity. On the top of the supporting seat are installed pull rods evenly arranged along its circumference and sliding up and down into the annular cavity. The metal clamping piece is installed at the lower end of the corresponding pull rod. Between the metal clamping piece and the top of the annular cavity is installed a downward pressing spring sleeved on the pull rod.

4. A cable withstand voltage performance testing device according to claim 2, characterized in that: The clamping drive group includes a mounting groove with a diameter larger than the annular groove and concentric with the fixed seat. After the push rod passes through the mounting groove, a pressure spring mounted on the push rod is connected to the inner wall of the mounting groove. The push rod is also equipped with a toggle assembly that drives it to move away from the metal clamping piece. After the push rod passes through the mounting groove, it is rollingly connected to a ball, and a rotating ring is rotatably connected in the mounting groove. The inner ring surface of the rotating ring is equipped with wedge blocks corresponding to the push rod one by one. The fixed seat is equipped with a rotating locking assembly that drives the rotating ring to rotate and locks the rotating ring.

5. The cable withstand voltage performance testing device according to claim 1, characterized in that: The pressure surface supplementary group includes an annular frame, and the lower end surface of the annular frame is also equipped with pressure blocks evenly arranged along its circumference. The lower end surface of the lower pressure strip is provided with arc-shaped card slots evenly arranged along its length. The corresponding arc-shaped card slots on the multiple lower pressure strips cooperate to receive the annular frame, and two adjacent pressure blocks distributed along the length of the lower pressure strip are plugged and matched through a locking assembly. The structures of the plurality of pressure surface supplementary groups are the same except that the diameters of the annular frames are different.

6. A cable withstand voltage performance testing device according to claim 5, characterized in that: The unified locking group includes a rectangular groove on the lower pressure strip, which is connected to multiple arc-shaped slots and penetrates the conical seat. The annular frame is provided with slots arranged along its circumference. A locking strip is slidably connected in the rectangular groove. The lower end surface of the conical seat is connected to a lifting rod by threaded cooperation. After the lifting rod penetrates into the conical seat, it is rotatably connected to a fixed disk. A swing rod is hinged between the fixed disk and the locking strip.

7. A cable withstand voltage performance testing device according to claim 3, characterized in that: The pressing group includes a lifting ring connected to the annular cavity by sliding up and down through a lifting driving source, and the inner ring surface of the lifting ring is equipped with pressing strips corresponding to the metal clips one by one, and the pressing strips are made of insulating material.

8. A cable withstand voltage performance testing device according to claim 4, characterized in that: The shifting assembly comprises a waist-shaped groove corresponding to the push rod and opened at the top of the installation groove, and a shifting rod penetrating the waist-shaped groove is installed on the top of the push rod.

9. The cable withstand voltage performance testing device according to claim 5, characterized in that: The locking assembly includes, except for the pressure blocks on the lower pressure strip, sockets and strips installed on both sides of the other pressure blocks arranged along the length direction thereof; the pressure blocks on the lower pressure strip are installed on both sides of the pressure blocks arranged along the length direction thereof; the strip on one of the two pressure blocks adjacent to each other and distributed along the length of the lower pressure strip is engaged with the socket on the other pressure block.

10. The cable withstand voltage performance testing device according to claim 1, characterized in that: The limiting group includes a groove formed at the top of the round through hole, a limiting wheel is rotatably connected in the groove, and a wire clamping seat corresponding to the limiting wheel is installed on the supporting seat.

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