Cable voltage-withstanding performance detection equipment

Abstract

The invention relates to the technical field of cable detection, and particularly provides cable pressure resistance detection equipment, which comprises a base, a pressing deformation mechanism, an end part clamping pressure resistance detection mechanism and an end part clamping electrifying mechanism. According to the invention, through cooperation of the pressing deformation mechanism, the end part clamping electrification mechanism and the end part clamping pressure-resistant detection mechanism, pressure-resistant performance detection under mechanical stress is carried out on a plurality of cables at the same time, and through cooperation of the pressing surface supplement group and the pressing block, the extruded length of the cables is adjusted. According to the invention, the cable transmission is detected under different extrusion deformation lengths, the pressure-resistant performance detection data of the cable is enriched, the more accurate average value of the detection data is obtained, the accuracy of the detection result is ensured, and the pressure-resistant performance and the electrical stability of the cable in actual use can be comprehensively evaluated.

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 opened at the top of the circular through-hole. A limiting wheel is rotatably connected in the groove, and a wire clamping seat corresponding to the limiting wheel one by one is installed on the supporting seat.

[0008] In a possible implementation manner, the end clamping and energizing mechanism includes energizing wires uniformly arranged along the circumferential direction of the inner ring surface of the fixed seat. Metal clamping pieces corresponding to the energizing wires one by one and connected to the energizing wires are installed on the side wall of the annular groove close to the energizing wires. A pressing rod sliding along the radial direction thereof and corresponding to the metal clamping piece one by one is connected to the other side wall of the annular groove. The pressing rod is made of insulating material, and a metal pressing piece corresponding to the metal clamping piece is installed on the pressing rod. The metal pressing piece has a U-shaped structure. An insertion slot for inserting and mating with the metal pressing piece is opened on the side wall of the annular groove. A clamping driving group for driving a plurality of pressing rods to drive the metal pressing pieces to move towards the metal clamping pieces to clamp the end of the cable is installed on the fixed seat.

[0009] In a possible implementation manner, the clamping driving group includes an installation groove opened on the fixed seat with a diameter larger than that of the annular groove and concentric therewith. A pressing spring sleeved on the pressing rod is connected between the pressing rod passing through the installation groove and the inner wall of the installation groove. A拨动组件 (translation note: a component for toggling) for driving the pressing rod to move away from the metal clamping piece is also installed on the pressing rod. A ball is rotatably connected after the pressing rod penetrates into the installation groove. A rotating ring is rotatably connected in the installation groove. Wedge blocks corresponding to the pressing rods one by one are installed on the inner ring surface of the rotating ring. A rotating and locking component for driving the rotating ring to rotate and locking the rotating ring is installed on the fixed seat.

[0010] In a possible implementation manner, the rotating and locking component includes a supplementary cover installed on the outer wall of the fixed seat and communicating with the installation groove. A locking screw is connected to the supplementary cover in a threaded manner. A gear connected to the locking screw in a spline-mating manner is rotatably connected in the supplementary cover. A tooth ring meshing and driving with the gear is installed on the outer ring surface of the rotating ring.

[0011] In a possible implementation manner, the拨动组件 (translation note: a component for toggling) includes an oblong groove opened at the top of the installation groove corresponding to the pressing rod. A toggle rod penetrating through the oblong groove is installed on the top of the pressing rod.

[0012] In one possible implementation, the end clamping withstand voltage detection mechanism includes an annular cavity opened on the vertical section of the support seat, the inner wall of the vertical section of the support seat is provided with jacks which are evenly arranged along its circumference and connected to the annular cavity, the bottom of the annular cavity is equipped with energized clips which are evenly arranged along its circumference, and the bottom of the energized clips is also equipped with energized wires, the top of the support seat is equipped with a pull rod which is evenly arranged along its circumference and slides up and down into the annular cavity, the lower end of the pull rod is equipped with a metal clip, a downward pressure spring mounted on the pull rod is installed between the metal clip and the top of the annular cavity, and a pressure group for pressing multiple metal clips is also installed in the annular cavity.

[0013] In a possible implementation, the pressing group includes a lifting ring connected to the annular cavity by sliding up and down through a lifting drive 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.

[0014] The downward pressure deformation mechanism includes a support frame installed on the top of the base, a pressure driving source (such as a hydraulic cylinder) is installed on the support frame, a T-shaped push seat is installed at the telescopic end of the pressure driving source, a conical seat with a cavity structure and a diameter that gradually increases downward is installed at the lower end of the vertical section of the push seat, a downward pressure strip evenly arranged along its circumference is installed on the outer wall of the conical seat, an inclined rod is installed between the end of the lower pressure strip away from the conical seat and the vertical section of the push seat, the lower pressure strip, the inclined rod and the vertical section of the push seat form a triangle, and a pressure block corresponding to the limit group is installed on the lower end surface of the lower pressure strip.

[0015] In one possible implementation, the lower end surfaces of multiple lower pressure strips are detachably connected to multiple pressure surface supplementary groups, which cooperate with the pressure blocks to adjust the extrusion length of the cable; a unified locking group is installed on the conical seat to lock the pressure surface supplementary groups and the lower pressure strips.

[0016] In one possible implementation, the pressure surface supplementing 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, and the lower end surface of the lower pressure strip is provided with arc-shaped grooves evenly arranged along its length direction, and the corresponding arc-shaped grooves on the multiple lower pressure strips are used to accommodate the annular frame, and two adjacent pressure blocks distributed along the length of the lower pressure strip are plugged in and matched by a locking assembly; except for the different diameters of the annular frames, the rest of the structures in the multiple pressure surface supplementing groups are the same.

[0017] In one possible implementation, the locking assembly includes, except for the pressure blocks on the lower pressure strip, sockets and strips installed on both sides of the remaining pressure blocks arranged along the length direction thereof, and sockets are installed on both sides of the pressure blocks on the lower pressure strip along the length direction thereof, and 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.

[0018] In one possible implementation, the unified locking group includes a rectangular groove on the lower pressure strip that is connected to multiple arc-shaped slots and passes through 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 is inserted 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.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. The present invention cooperates with the downward pressure deformation mechanism, the end clamping power-on mechanism and the end clamping pressure resistance detection mechanism to simultaneously test the pressure resistance performance of multiple cables under mechanical stress, and adjusts the extruded length of the cable by cooperating with the pressure surface supplementary group and the pressure block, thereby realizing the detection of cable transportation under different extrusion deformation lengths, enriching the pressure resistance performance test data of the cable, and obtaining a more accurate average value of the test data, which not only ensures the accuracy of the test results, but also can comprehensively evaluate the pressure resistance performance and electrical stability of the cable in actual use.

[0020] 2. The lower pressure strip, inclined rod, conical seat and vertical section of the push seat in the present invention form a stable triangular structure, so that each lower pressure strip and push block exert the same pressure on the cable below it, thereby improving the consistency of pressure on multiple cables and further improving the accuracy of cable pressure resistance performance testing.

[0021] 3. In the present invention, multiple cables are dispersed on the supporting seat in a circumferentially uniform arrangement under the limiting action of multiple limiting groups, and then the ends of the multiple cables are quickly clamped and uniformly locked through the cooperation of the end clamping power-on mechanism and the end clamping pressure-resistant detection mechanism, which greatly improves the efficiency of the cable pressure-resistant performance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

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

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

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

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

[0027] Figure 5 yes Figure 3 and Figure 4 Schematic diagram of the three-dimensional structure after assembly and connection.

[0028] Figure 6 yes Figure 5 A partial enlarged view of point A in the figure.

[0029] Figure 7 yes Figure 5 A partial cross-sectional view of .

[0030] Figure 8 yes Figure 2 A top sectional view of .

[0031] Fig. 9 yes Figure 2 Front cross-sectional view.

[0032] Fig.10 yes Fig. 9 A partial enlarged view of point B in FIG.

[0033] Figure numerals: 1, base; 2, fixed seat; 3, supporting leg; 4, supporting seat; 5, downward pressure deformation mechanism; 50, supporting frame; 51, push seat; 52, conical seat; 53, lower pressure strip; 54, inclined rod; 55, pressure block; 56, pressure surface supplementary group; 560, annular frame; 561, arc-shaped card slot; 580, card seat; 581, card strip; 57, unified locking group; 570, rectangular slot; 571, locking strip; 572, lifting rod; 573, swing rod; 6, annular groove; 7, end clamping power supply mechanism; 70, metal The components include a clamping piece; 71, abutment rod; 72, metal pressure piece; 74, clamping drive group; 740, mounting groove; 741, pressure spring; 742, rotating ring; 743, wedge block; 750, supplementary cover; 751, locking screw; 8, end clamping pressure resistance detection mechanism; 80, annular cavity; 81, jack; 82, power-on clamp; 83, pull rod; 84, metal clamp; 85, downward pressure spring; 86, pressure group; 860, lifting ring; 861, pressure strip; 9, limit group; 90, wire holder; 91, limit wheel; 10, cable. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] See also Figure 1 and Figure 2 A cable withstand voltage performance testing device comprises: 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 wall of the fixing seat 2 through a plurality of supporting legs 3, the supporting seat 4 has a concave vertical cross section and a round through hole is opened in the middle, the supporting leg 3 is a hollow structure (the connecting wire can pass through the supporting leg 3, and the internal structure schematic diagram of the supporting leg 3 is not shown in the figure), and a downward pressing deformation mechanism 5 for squeezing the cable 10 is installed on the top of the base 1.

[0037] See also Figure 1 and Figure 2 An annular groove 6 is provided on the top of the fixing seat 2, and an end clamping power-on mechanism 7 is installed in the annular groove 6. An end clamping 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 power-on mechanism 7 and the end clamping 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 is installed on the supporting seat 4 to limit the horizontal sections of multiple cables 10 arranged circumferentially along the supporting seat 4.

[0038] The side wall of the support seat 4 is provided with uniformly arranged voltage detectors (such as voltmeters, oscilloscopes, digital multimeters, etc.). The end clamping power supply mechanism 7 cooperates with the end clamping withstand voltage detection mechanism 8 to fix the two ends of the cable 10 respectively and connect them in series with the power supply and the load to avoid the two ends of the cable 10 being directly connected to the positive and negative poles of the power supply to cause a short circuit. At this time, the voltage detector is connected in parallel with the two ends of the cable 10 to detect the state of the voltage transmitted by the cable 10. Both ends of each cable 10 are connected in series with a separate power supply, load, and a separate voltage detector in parallel. When the downward pressure deformation mechanism 5 applies pressure to the cable 10 to flatten the cable 10, the voltage detector is used to check whether the voltage transmitted by the flattened cable 10 is affected. At the same time, multiple cables 10 are tested to obtain the average value of the test results, thereby ensuring the accuracy of the test results.

[0039] See also Figure 1 and Fig. 9 The limiting group 9 includes a groove opened at the top of the round through hole, and a limiting wheel 91 is rotatably connected in the groove. A wire clamping seat 90 corresponding to the limiting wheel 91 is installed on the supporting seat 4. The limiting wheel 91 is used to support the bending part of the cable 10. The limiting wheel 91 cooperates with the wire clamping seat 90 to limit the cable 10 to avoid the cable 10 from moving when the cable 10 is squeezed and deformed, thereby affecting the detection accuracy.

[0040] Refer to Figure 1 、 Figure 2 、 Figure 8 and Fig. 9 As shown in, the end clamping and energizing mechanism 7 includes energizing wires uniformly arranged along the circumferential direction of the inner ring surface of the fixed seat 2. On the side wall of the annular groove 6 close to the energizing wires, there are metal clamping pieces 70 corresponding to and connected to the energizing wires one by one. On the other side wall of the annular groove 6, there is a push rod 71 sliding along its radial direction and corresponding to the metal clamping piece 70 one by one. The push rod 71 is made of insulating material, and a metal pressing piece 72 corresponding to the metal clamping piece 70 is installed on the push rod 71. The metal pressing piece 72 has a U-shaped structure. An insertion slot for inserting and mating with the metal pressing piece 72 is provided on the side wall of the annular groove 6. A clamping drive group 74 for driving a plurality of push rods 71 to drive the metal pressing piece 72 to move towards the metal clamping piece 70 to clamp the end of the cable 10 is installed on the fixed seat 2.

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

[0042] Refer to Figure 2 、 Figure 8 and Fig. 9 As shown in, the clamping drive group 74 includes an installation groove 740 opened in the fixed seat 2 with a diameter larger than that of the annular groove 6 and concentric with it. A pressing spring 741 sleeved on the push rod 71 is connected between the push rod 71 passing through the installation groove 740 and the inner wall of the installation groove 740. A拨动组件 is also installed on the push rod 71 to drive it to move away from the metal clamping piece 70. After the push rod 71 penetrates into the installation groove 740, it is rotatably connected with a ball. A rotating ring 742 is rotatably connected in the installation groove 740. Wedge blocks 743 corresponding to the push rods 71 one by one are installed on the inner ring surface of the rotating ring 742. A rotating locking component for driving the rotating ring 742 to rotate and locking the rotating ring 742 is installed on the fixed seat 2.

[0043] Refer to Figure 2 、 Figure 8 and Fig. 9 It should be noted that there is an unclear "拨动组件" in the original text which needs to be further clarified for more accurate translation.The 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 Fig. 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 , Fig. 9 and Fig.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] See also Figure 1 , Fig. 9 and Fig.10 The pressing group 86 includes a lifting ring 860 connected to the annular cavity 80 by sliding up and down through a lifting driving source. The inner ring surface of the lifting ring 860 is equipped with pressing strips 861 corresponding to the metal clips 84 one by one, and the pressing strips 861 are made of insulating material.

[0048] The metal clip 84 connected to it is driven upward by the pull rod 83, and the downward pressure spring 85 is contracted. Then, the conductor at one end of the cable 10 is inserted into the jack 81. After the conductor of the cable 10 passes through the jack 81, it enters between the metal clip 84 and the energized clip 82. Then, the pull rod 83 is released, so that the metal clip 84 pre-clamps the end of the cable 10 under the elastic force of the downward pressure spring 85. When the ends of multiple cables 10 are clamped between the corresponding metal clip 84 and the energized clip 82, the lifting ring 860 is driven downward by 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 pressure strip 861, thereby achieving unified compression of the ends of multiple cables 10, further improving the convenience of fixing the cable 10.

[0049] Special note: Among the power-carrying wires connected to the lower end of the power-carrying clip 82 and the power-carrying wires connected to the metal clamping piece 70, one of the power-carrying wires is directly connected to one pole of the power supply, the other power-carrying 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 to both ends of the cable 10.

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

[0051] When multiple cables 10 are fastened and energized, the push seat 51 and the lower pressure strip 53 are driven downward by the pressure driving source, and the lower pressure strip 53 presses the cable 10 against the supporting seat 4 through the pressure block 55 and flattens the cable 10. The stable triangular structure formed by the lower pressure strip 53, the inclined rod 54, the conical seat 52, and the vertical section of the push seat 51 ensures that the pressure applied by each lower pressure strip 53 and the pressure block 55 to the cable 10 thereunder is the same, thereby improving the consistency of the pressure applied to multiple cables 10 and allowing each cable 10 to be tested under the same pressure, thereby improving the accuracy of the pressure resistance performance test of the cable 10.

[0052] See also Figure 1 , Figure 3 and Figure 4 The lower end surfaces of the multiple lower pressure strips 53 are detachably connected with multiple pressure surface supplementary groups 56. The pressure surface supplementary groups 56 cooperate with the pressure blocks 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 detection data for the pressure resistance performance detection of the cable 10, and further improve the accuracy of the pressure resistance performance detection of the cable 10; a unified locking group 57 is installed on the conical seat 52 for installing and locking between the pressure surface supplementary group 56 and the lower pressure strip 53, so as to improve the convenience of adjusting and fixing the compressed length of the cable 10.

[0053] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The pressure surface supplementing group 56 includes an annular frame 560, and the lower end surface of the annular frame 560 is also equipped with pressure blocks 55 evenly arranged along its circumference. The lower end surface of the lower pressure strip 53 is provided with arc-shaped grooves 561 evenly arranged along its length direction. The corresponding arc-shaped grooves 561 on the multiple lower pressure strips 53 are used to accommodate the annular frame 560, and the two adjacent pressure blocks 55 distributed along the length of the lower pressure strip 53 are plugged and matched through a locking component; except for the different diameters of the annular frames 560, the rest of the structures of the multiple pressure surface supplementing groups 56 are the same.

[0054] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The locking assembly includes, except for the pressing block 55 on the lower pressing strip 53, sockets 580 and strips 581 installed on both sides of the other pressing blocks 55 arranged along the length direction thereof. The pressing blocks 55 on the lower pressing strip 53 are installed with sockets 580 on both sides of the pressing blocks 55 arranged along the length direction thereof. The strips 581 on one of the two pressing blocks 55 adjacent to each other and distributed along the length of the lower pressing strip 53 are snap-fitted with the sockets 580 on the other pressing block 55.

[0055] When it is necessary to simulate various cable 10 flattening lengths during testing, the pressure surface supplementing groups 56 are added sequentially from the inside to the outside, and the diameters of the annular frames 560 on the multiple pressure surface supplementing groups 56 are increased sequentially from the inside to the outside. When installing the pressure surface supplementing groups 56, the annular frames 560 are clamped in the corresponding arc-shaped grooves 561 on the multiple lower pressure strips 53. At the same time, the corresponding clamping seats 580 on two adjacent pressure blocks 55 distributed along the length of the lower pressure strip 53 are opposite to the clamping strip 581, so that the annular frame 560 is aligned and clamped with the corresponding arc-shaped grooves 561, and then the unified locking group 57 fixes the annular frame 560 on the lower pressure strip 53.

[0056] See also Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The unified locking group 57 includes a rectangular groove 570 opened on the lower pressure strip 53, which is connected to multiple arc-shaped grooves 561 and penetrates the conical seat 52. The annular frame 560 is provided with slots arranged along its circumference. A locking strip 571 is slidably connected in the rectangular groove 570. The lower end surface of the conical seat 52 is connected to a lifting rod 572 by threaded cooperation. After the lifting rod 572 penetrates into the conical seat 52, it is rotatably connected to a fixed disk. A swing rod 573 is hinged between the fixed disk and the locking strip 571.

[0057] When the annular frame 560 enters the arc-shaped slot 561, the two adjacent pressure blocks 55 are locked by the locking assembly, and the lifting rod 572 is rotated. The lifting rod 572 pulls the fixed plate downward during the rotation by threaded cooperation with the conical seat 52, and the fixed plate pushes the locking strip 571 to move through the swing rod 573. The locking strip 571 is inserted into the slot of the annular frame 560, thereby connecting and locking the annular frame 560 in the arc-shaped slots 561 of the multiple lower pressure strips 53. The unified locking group 57 cooperates with the pressure surface supplementary group 56 to realize the convenient expansion and adjustment of the pressure surfaces of multiple cables 10.

[0058] See also Figure 1-Figure 10When working, the cable 10 is limited on the supporting seat 4 by the limiting group 9, and the multiple cables 10 are dispersed on the supporting seat 4 in a circumferentially uniform arrangement under the limiting action of the multiple limiting groups 9, and then the end clamping power-on mechanism 7 and the end clamping withstand voltage detection mechanism 8 are coordinated to quickly clamp and uniformly lock the ends of the multiple cables 10, which greatly improves the efficiency of the withstand voltage performance detection of the cable 10.

[0059] Afterwards, when multiple cables 10 are fastened and energized, the push seat 51 and the lower pressure bar 53 are driven downward by the pressure driving source, and the lower pressure bar 53 presses the cable 10 against the supporting seat 4 through the pressure block 55 and flattens the cable 10. The stable triangular structure formed by the lower pressure bar 53, the inclined rod 54, the conical seat 52, and the vertical section of the push seat 51 makes each lower pressure bar 53 and the pressure block 55 apply the same pressure to the cable 10 thereunder, thereby improving the consistency of the pressure on multiple cables 10. Then, a voltage detector is used to observe whether the transmission voltage of the flattened cable 10 is affected, and multiple cables 10 are tested at the same time to obtain the average value of the voltage resistance test results of multiple cables 10, thereby ensuring the accuracy of the test results.

[0060] When it is necessary to simulate the withstand voltage value of the cable 10 under different flattening lengths, the extrusion length of the cable 10 is adjusted by cooperating with the pressure surface supplementary group 56 and the pressure block 55, so that the cable 10 can be tested under different extrusion deformation lengths, providing multiple sets of test data for the withstand voltage performance test of the cable 10.

[0061] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as a limitation on the present invention.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in 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 which is installed a fixing seat with a concave vertical cross-section. The outer side wall of the fixing seat is installed with a circular supporting seat above the fixing seat through a plurality of support legs. The supporting seat has a concave vertical cross-section and a circular through-hole is opened in the middle. A downward pressing deformation mechanism for extruding the cable is installed on the top of the base. An annular groove is opened on the top of the fixing seat, and an end clamping and energizing mechanism is installed in the annular groove. An end clamping and withstand voltage detecting mechanism is installed on the supporting seat. The two ends of the cable are respectively fixed on the end clamping and energizing mechanism and the end clamping and withstand voltage detecting mechanism, and the cable is in an inverted L shape after passing through the circular through-hole. A limiting group for limiting a plurality of cable horizontal segments arranged along the circumference of the supporting seat is installed on the supporting seat. The downward pressing deformation mechanism includes a support frame installed on the top of the base. A pressing driving source 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 with a cavity structure whose diameter gradually increases downward. The outer wall of the conical seat is installed with downward pressing strips 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 a pressing block corresponding to the limiting group one by one. The lower end surfaces of a plurality of downward pressing strips are jointly 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. A unified locking group for installing and locking between the pressing surface supplement groups and the downward pressing strips is installed on the conical seat.

2. A cable withstand voltage performance testing device according to claim 1, characterized in that: 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 side wall of the annular groove close to the energizing wires, metal clamping pieces corresponding to the energizing wires one by one and connected to the energizing wires are installed. On the other side wall of the annular groove, a rod is connected which slides radially and corresponds to the metal clamping pieces one by one. The rod is made of insulating material. A metal pressing piece corresponding to the metal clamping piece is installed on the rod. The metal pressing piece has a U-shaped structure. An insertion slot for inserting and matching with the metal pressing piece is opened on the side wall of the annular groove. A clamping driving group for driving a plurality of rods to drive the metal pressing pieces to move towards the metal clamping pieces to clamp the cable end is installed on the fixing seat.

3. A cable withstand voltage performance testing device according to claim 1, characterized in that: The end clamping and withstand voltage detecting mechanism includes an annular cavity opened on the vertical section of the supporting seat. The inner wall of the vertical section of the supporting seat is opened with insertion holes evenly arranged along its circumference and communicated with the annular cavity. On the bottom of the annular cavity, energizing clamping pieces are evenly arranged along its circumference. The bottom of the energizing clamping pieces is also installed with energizing wires. On the top of the supporting seat, pull rods are evenly arranged along its circumference and slide up and down into the annular cavity. A metal clamping piece is installed at the lower end of the pull rod. A downward pressing spring sleeved on the pull rod is installed between the metal clamping piece and the top of the annular cavity. A pressing group for pressing a plurality of metal clamping pieces is also installed in the annular cavity.

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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