Wire core resistance detection device for cross-linked polyethylene insulated power cable

Abstract

The invention belongs to the technical field of cross-linked polyethylene insulated power cable performance detection, and particularly relates to a cross-linked polyethylene insulated power cable core resistance detection device which comprises a detection table, every two sets of symmetrical sliding assemblies are close to each other, and two conducting strips are installed on one set of symmetrical sliding assemblies. Clamping parts are mounted on the group of symmetrical sliding components; two connecting wires of the direct-current resistance bridge are connected with each group of conducting strips; the lifting conveying mechanism is arranged at the bottom of the detection table, and two groups of staggered connecting rod guide mechanisms are mounted on the lifting conveying mechanism; the two lifting wire assemblies are arranged on the left side and the right side of the detection table and connected with the two staggered connecting rod guiding mechanisms respectively. The resistance detection device can be matched with a cable production line to carry out online resistance detection on the core conductor of the production line, and the situation that the core conductor of the crosslinked polyethylene insulated power cable cannot be continuously processed between a stranding machine and an insulating extruder is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of performance detection of cross-linked polyethylene insulated power cables, and particularly relates to a device for detecting the core resistance of a cross-linked polyethylene insulated power cable. Background Art

[0002] During the production process of cross-linked polyethylene insulated power cables, it is an essential step to detect the resistance of the core conductor. Especially after the core conductor is stranded / bunched, it is necessary to avoid changes in the conductor cross-sectional area or poor contact caused by stranding processes (such as stranding pitch and tightness), which may affect the resistance value.

[0003] Most of the existing devices for detecting the resistance of core conductors cut a section of the core conductor to be detected from the production line as a test sample, and then clamp the test sample onto a core conductor resistance detection instrument for resistance detection. However, since the stranded core conductor is continuously conveyed to the insulation extruder for insulation layer wrapping treatment, obviously, this traditional resistance detection instrument cannot be used on the cable production line, especially for on-line resistance detection of the continuously stranded core conductor. As a result, it is impossible to adjust the stranding parameters or troubleshoot the single wire material problem in a timely manner when abnormalities occur in the stranded core conductor, thus avoiding waste of costs in subsequent processes (such as insulation extrusion). Summary of the Invention

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention provides a device for detecting the core resistance of a cross-linked polyethylene insulated power cable, which includes a detection table and a symmetric sliding component. Four groups of symmetric sliding components are arranged on the top surface of the detection table. Every two groups of symmetric sliding components are close to each other. The two groups of symmetric sliding components on the upper surface near the left end of the detection table and the two groups of symmetric sliding components on the upper surface near the right end of the detection table are symmetrically arranged. Among the two groups of symmetric sliding components that are close to each other, one group of symmetric sliding components is used to drive two conductive sheets to move closer to or away from each other, and one group of symmetric sliding components is used to drive two clamping parts to move closer to or away from each other. The movement trajectories of the two conductive sheets and the two clamping parts are the same; a DC resistance bridge, the two connecting wires of the DC resistance bridge installed on the detection table are connected to each group of conductive sheets; a lifting and conveying mechanism, the lifting and conveying mechanism is arranged at the bottom of the detection table, and two groups of misaligned connecting rod guiding mechanisms are installed on the lifting and conveying mechanism; a lifting wire component, two groups of lifting wire components are arranged on both sides of the detection table in the core moving direction, and the two groups of lifting wire components are respectively connected to the two groups of misaligned connecting rod guiding mechanisms; Wherein, when the lifting and conveying mechanism drives a group of lifting wire components to rise / fall through a group of connecting rod guiding mechanisms, the other group of connecting rod guiding mechanisms will drive the other group of lifting wire components to synchronously fall / rise; Skillfully through the cooperation of the lifting and conveying mechanism, the connecting rod guiding mechanism and the lifting wire assembly, when the lifting wire assembly on the left side of the inspection table descends, it realizes the downward pressing process of the core conductor after stranding by the stranding machine, so that the core conductor after stranding can be temporarily stored and processed on the left side of the inspection table. The lifting wire assembly on the right side will rise synchronously, so that the core conductor pressed and retained on the right side of the inspection table is continuously released and sent into the insulation extruder for insulation layer wrapping treatment.

[0005] In some embodiments, the symmetric sliding assembly includes a bottom plate body fixed on the upper surface of the inspection table. On the top surface of each bottom plate body, a mounting plate for installing a guide rail bar is fixedly provided. The mounting plate is installed on the bottom plate body by countersunk head screws, and the guide rail bar is also installed on the mounting plate by countersunk head screws. Two sliding parts moving away from or approaching each other are slidably installed on the guide rail bars. A ball screw nut pair cooperating with the screw member is installed on each sliding part. The two ends of the screw member are installed on the support bodies fixed on the front and rear side surfaces of the bottom plate body through bearings, and a power unit for driving the screw member to rotate is fixedly provided on one of the support bodies. A group of two sliding parts and two conductive sheets are detachably connected by bolts, and the other group of two sliding parts are connected to two clamping parts, and the clamping parts are located outside the conductive sheets. Through the cooperation of two groups of symmetric sliding assemblies approaching each other, the symmetric conductive sheets come into contact with the core conductor, and the symmetric clamping parts will clamp and fix the core conductor, so that the core conductor located between the two groups of conductive sheets can be stably and safely subjected to resistance detection processing.

[0006] In some embodiments, the lifting and conveying mechanism includes a box body part. The box body part is arranged along the height direction of the inspection table, and the top of the box body part is installed on the bottom surface of the inspection table by welding or bolt fixing. A driving wheel and a driven wheel, the driving wheel and the driven wheel are respectively rotatably installed in the box body part through a shaft rod and a bearing part, and the driving wheel and the driven wheel are respectively located at the inner bottom and the inner bottom of the box body part. A synchronous belt body, the synchronous belt body is sleeved on the driving wheel and the driven wheel, and the shaft rod corresponding to the driving wheel is connected to the power unit fixed on the side surface of the box body part. Skillfully selecting the cooperation of the synchronous belt body, the driven wheel and the driving wheel for the lifting and conveying mechanism can be hiddenly installed under the inspection table and will not occupy a large height space on the left and right sides of the inspection table.

[0007] In some embodiments, the link guiding mechanism includes a connecting block, a bent portion, a guide sleeve, and a guide rod; two connecting blocks are placed in the accommodating cavity formed between the outer side surface of the synchronous belt body and the inside of the box body portion, and the two connecting blocks are installed in a front-back staggered and up-down symmetric manner on the synchronous belt body; when the synchronous belt body rotates, one of the connecting blocks moves upward or downward, and the other connecting block moves downward or upward synchronously; first through cavities are formed in the left and right wall surfaces of the box body portion along its height direction, and the two first through cavities are in a front-back symmetric state and communicate with the two accommodating cavities; the bent portion preferably adopts an L-shaped square rod, so that the left and right horizontal square rods of the bent portion pass through the first through cavity, and one end of the left and right horizontal square rods of the bent portion is connected to the connecting block, and the other end of the left and right horizontal square rods passes through the first through cavity and extends to the left and right side surfaces of the detection table; guide sleeves are fixedly provided on the front and rear bent portions of each bent portion, and the guide sleeves are sleeved on the guide rods fixedly provided on the lower surface of the detection table along the height direction.

[0008] In some embodiments, the link guiding mechanism further includes a positioning pin, a half-thread bolt, a limiting portion, a rolling ball, a T-shaped portion, and a first elastic element; several positioning pins are embedded in the blind holes formed on the surface of the synchronous belt body, and the several positioning pins are arranged in a double-row equidistant array on the synchronous belt body, and a threaded blind hole for connecting with the half-thread bolt is formed at the end of each positioning pin; a through hole for accommodating the half-thread bolt is formed on the connecting block, and a pin hole for cooperating with the positioning pin is formed on the surface of the through hole close to the synchronous belt body, and a thread groove for cooperating with the half-thread bolt is also formed on the hole wall of the through hole close to the pin hole; a moving gap is formed between the side wall of the connecting block away from the synchronous belt body and the inner wall of the box body portion, and the width of the moving gap is the same as the length of the positioning pin protruding from the surface of the synchronous belt body; second through cavities for the screw rod of the half-thread bolt to pass through are formed in the front and rear side surfaces of the box body portion along the height direction, and a limiting portion for limiting the half-thread bolt is slidably attached to the front and rear side surfaces of the box body portion at the second through cavity, so that the hexagonal head of the half-thread bolt is located outside the box body portion; rolling balls that are in rolling contact with the surface of the box body portion are rotatably installed on the surface of the limiting portion close to the box body portion; a T-shaped sliding groove for the T-shaped portion to slide is formed on the side wall of the connecting block connected to the bent portion, and the tail of the T-shaped portion is connected to a first elastic element, and the first elastic element applies a force to the connecting block in the direction close to the synchronous belt body; The insertion and cooperation of the positioning pin and the connecting block are ingeniously combined, and they are connected to each other through the half-thread bolt, so that the position of the connecting block can be quickly adjusted on the outer side surface of the synchronous belt body, thereby enabling the adjustment of the distance between the two front-back and up-down symmetric connecting blocks, which is convenient for the lifting wire assembly to perform wire pressing and wire releasing operations on wire core conductors of different diameters.

[0009] In some embodiments, the lifting wire assembly includes a T-shaped bracket, a U-shaped seat, a pressing roller, a tensioning roller, and a tensioning assembly; the T-shaped bracket is fixedly arranged on the outer side surface of the end of the bending part, so that the T-shaped bracket is used to suspend and support the U-shaped seat on both sides of the wire core moving direction of the detection table; a pressing roller is rotatably arranged at the U-shaped opening of the U-shaped seat through a shaft rod, and a tensioning roller is correspondingly arranged on the inner side of the pressing roller; both ends of the tensioning roller are installed on the U-shaped seat through the tensioning assembly; The pressing roller capable of self-rotation is ingeniously fixed at the U-shaped opening of the U-shaped seat, while the tensioning roller located on the inner side is slidably installed on the U-shaped seat through the tensioning assembly. When the bending part drives the U-shaped seat to descend vertically, only the pressing roller can press the wire core conductor at this time, while the self-rotating tensioning roller only plays a role of tensioning and guiding the wire core conductor.

[0010] In some embodiments, the tensioning assembly includes a sliding block slidably placed in a sliding guide groove opened on the U-shaped seat. A bearing part connected to the shaft rod on the tensioning roller is installed on the sliding block. A regulating screw rod penetrating and extending out of the U-shaped seat is connected to the side wall of the sliding block, and a nut part is connected to the regulating screw rod. A second elastic element is connected between the side wall of the sliding block and the groove wall of the sliding guide groove, and the second elastic element is sleeved on the regulating screw rod.

[0011] In some embodiments, a cover body is detachably installed on the upper surface of the detection table. Threading holes for the wire core to pass through are opened on the left and right side walls of the cover body, and sealing rings are installed in the threading holes. A DC resistance bridge is installed on the upper surface of the cover body, and wire guide wheels are installed on the top surface of the detection table on both sides of the cover body.

[0012] The present invention has the following beneficial effects: Through the cooperation of the lifting transmission mechanism, the connecting rod guiding mechanism, and the lifting wire assembly disclosed in the present invention, when the lifting wire assembly on the left side of the detection table descends, it realizes downward pressing treatment on the wire core conductor after being stranded by the stranding machine, so that the stranded wire core conductor can be temporarily stored and processed on the left side of the detection table. The lifting wire assembly on the right side will rise synchronously, so that the wire core conductor pressed and retained on the right side of the detection table is continuously released and sent into the insulation extruder for insulation layer wrapping treatment. It will not cause the stranding machine and the insulation extruder on both sides of the wire core resistance detection device to stop working when the continuously produced and processed cable conductor is subjected to resistance detection online, and thus there will be no situation where the wire core conductor of the cross-linked polyethylene insulated power cable cannot be continuously processed between the stranding machine and the insulation extruder.

[0013] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 Schematic three-dimensional view of the wire core resistance detection device disclosed by the present invention; Figure 2 Exploded view of the cover body and the detection table disclosed by the present invention; Figure 3 Schematic three-dimensional view of the symmetric sliding assembly disclosed by the present invention; Figure 4 Schematic diagram of the cooperation of the lifting and conveying mechanism, the connecting rod guiding mechanism and the lifting wire assembly disclosed by the present invention; Figure 5 Exploded view of the lifting and conveying mechanism disclosed by the present invention; Figure 6 Exploded view of the synchronous belt body and the connecting block disclosed by the present invention; Figure 7 Exploded view of the connecting block and the half-thread bolt disclosed by the present invention; Figure 8 Assembly diagram of the bending part and the U-shaped seat disclosed by the present invention.

[0016] In the figure: 1. Detection table; 2. Symmetric sliding assembly; 21. Bottom plate body; 22. Installation plate; 23. Guide rail strip; 24. Sliding part; 25. Lead screw part; 26. Bracket body; 27. Clamping part; 3. DC resistance bridge; 31. Connecting wire; 32. Conductive sheet; 4. Lifting and conveying mechanism; 41. Box body part; 411. Accommodation cavity; 412. First through cavity; 413. Moving gap; 414. Second through cavity; 42. Driving wheel; 43. Driven wheel; 44. Synchronous belt body; 5. Connecting rod guiding mechanism; 51. Connecting block; 511. Through hole; 512. Pin hole; 513. T-shaped sliding groove; 52. Bending part; 53. Guide sleeve; 54. Guide rod; 55. Positioning pin; 551. Threaded blind hole; 56. Half-thread bolt; 57. Limiting part; 58. Ball; 59. T-shaped part; 591. First elastic element; 6. Lifting wire assembly; 61. T-shaped bracket; 62. U-shaped seat; 63. Pressing roller; 64. Tensioning roller; 65. Sliding square block; 66. Adjusting screw; 67. Nut part; 68. Second elastic element; 7. Cover body; 71. Sealing ring; 8. Wire wheel; 9. Core conductor. Specific implementation manner

[0017] 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 making creative efforts belong to the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0019] Please refer to Figures 1 - 8 As shown, the present invention is a core resistance detection device for a cross-linked polyethylene insulated power cable, including a detection table 1, a symmetric sliding assembly 2. Four groups of symmetric sliding assemblies 2 are placed on the top surface of the detection table 1, and every two groups of symmetric sliding assemblies 2 are close to each other. The two groups of symmetric sliding assemblies 2 on the upper surface near the left end of the detection table 1 and the two groups of symmetric sliding assemblies 2 on the upper surface near the right end of the detection table 1 are symmetrically arranged. Among the two groups of symmetric sliding assemblies 2 that are close to each other, one group of symmetric sliding assemblies 2 is used to drive two conductive sheets 32 to move closer to or away from each other, and one group of symmetric sliding assemblies 2 is used to drive two clamping parts 27 to move closer to or away from each other. The movement trajectories of the two conductive sheets 32 and the two clamping parts 27 are the same; a DC resistance bridge 3, and two connecting wires 31 of the DC resistance bridge 3 installed on the detection table 1 are connected to each group of conductive sheets 32; a lifting and conveying mechanism 4, the lifting and conveying mechanism 4 is placed at the bottom of the detection table 1, and two groups of misaligned connecting rod guiding mechanisms 5 are installed on the lifting and conveying mechanism 4; a lifting wire assembly 6, two groups of lifting wire assemblies 6 are placed on both sides of the detection table 1 in the core moving direction, and the two groups of lifting wire assemblies 6 are respectively connected to the two groups of misaligned connecting rod guiding mechanisms 5; Among them, when the lifting and conveying mechanism 4 drives a group of lifting wire assemblies 6 to rise / fall through a group of connecting rod guiding mechanisms 5, the other group of connecting rod guiding mechanisms 5 will drive the other group of lifting wire assemblies 6 to synchronously fall / rise; In this embodiment, the resistance detection device of the solution is laid on the cross-linked polyethylene insulated power cable production line, and the resistance detection device is located between the stranding machine and the insulation extruder. That is to say, the inlet direction of the stranded core conductor 9 is on the left side of the detection table 1, and the outlet direction of the core conductor 9 after resistance detection is on the right side of the detection table 1. Four groups of symmetric sliding components 2 with the same structure are ingeniously arranged on the upper surface of the detection table 1, and the two groups of symmetric sliding components 2 on the left side and the two groups of symmetric sliding components 2 on the right side are symmetrically arranged, so that the two groups of symmetric conductive sheets 32 can be synchronously attached to the core conductor 9, and the two clamping parts 27 close to the outside of the conductive sheet 32 approach each other synchronously, and can clamp and fix the core conductor 9, so that the DC resistance bridge 3 works, and is detachably connected to one of the conductive sheets 32 in each group through two connecting wires 31, so as to accurately detect the resistance of the continuously moving core conductor 9 after stranding; The lifting wire assemblies 6 on the left and right sides of the detection table 1 are ingeniously combined with the synchronous belt type lifting and conveying mechanism 4 through two groups of connecting rod guiding mechanisms 5. When the stranded core conductor 9 on the detection table 1 is clamped and fixed for resistance detection, at this time, the lifting wire assembly 6 on the left side will vertically descend from top to bottom under the drive of the lifting and conveying mechanism 4, so as to press down the core conductor 9 stranded by the stranding machine, so that the stranded core conductor 9 can be temporarily stored and processed on the left side of the detection table 1, and it will not cause the stranding machine to be unable to normally strand the core conductor 9 when the resistance of a local position of the cable conductor is detected. When the left lifting wire assembly 6 moves vertically from top to bottom, at this time, the lifting and conveying mechanism 4 will synchronously drive the right lifting wire assembly 6 to vertically rise from bottom to top, so that the core conductor 9 pressed and retained on the right side of the detection table 1 is continuously released and sent into the insulation extruder for insulation layer wrapping treatment, and it will not cause the insulation extruder on the right side of the detection table 1 to be unable to normally wrap the insulation layer on the core conductor 9 when the resistance of a local position of the cable conductor is detected, thus affecting the continuous processing of the core conductor 9 of the cross-linked polyethylene insulated power cable between the stranding machine and the insulation extruder; When the detection of this section of the stranded core conductor 9 is completed and the stranded core conductor 9 continues to operate normally, at this time, the four groups of symmetric sliding components 2 will drive the conductive sheet 32 and the clamping part 27 to disengage from the contact and clamping of the core conductor 9, and at this time, the left and right lifting wire assemblies 6 will only play a role of guiding and conveying the core conductor 9 and will not play a role of clamping the core conductor 9, so that the stranded core conductor 9 can be continuously transported on the lifting wire assembly 6 and the upper surface of the detection table 1 to the insulation extruder for insulation layer wrapping treatment; Before the resistance detection of the normally stranded core conductor 9 is required again, it is necessary to control the lifting and conveying mechanism 4 to work at this time, so that the lifting wire assembly 6 on the left side of the detection table 1 vertically rises from bottom to top. At this time, the core wire pressed down on the left side of the detection table 1 will be released, facilitating the resistance detection of the core conductor 9 again. When the core conductor 9 is detected again, the lifting wire assembly 6 on the left side continues to descend to press and store the stranded core conductor 9, while the lifting wire assembly 6 on the right side of the detection table 1 will synchronously descend vertically from top to bottom, enabling the core conductor 9 on the right side of the detection table 1 to be pressed and stored downward through the lifting wire assembly 6 on the right side. When the core conductor 9 is detected again, the core conductor 9 stored on the right side is released, providing a sufficient amount of core conductor 9 for the insulation extruder to perform the insulation layer wrapping process; Preferably, the rising or falling time and height of the left and right lifting wire assemblies 6 should be greater than the time for the core conductor 9 on the detection table 1 to perform the resistance detection, to prevent all the core conductors 9 pressed and retained on the right side of the detection table 1 from being released. Since the core conductor 9 has not been detected yet, it will affect the normal insulation layer wrapping process of the core conductor 9 by the insulation extruder. At the same time, it is also necessary to prevent the lifting wire assembly 6 on the left side of the detection table 1 from descending to the limit position. Since the core conductor 9 has not been detected yet, it will cause the phenomenon that the core conductors 9 stranded by the stranding machine are stacked on the left side of the detection table 1, which will affect the normal conveying process of the core conductor 9.

[0020] Refer to Figure 2 and Figure 3 As shown, the symmetric sliding assembly 2 includes a bottom plate body 21 fixed on the upper surface of the detection table 1. The top surface of each bottom plate body 21 is fixedly provided with a mounting plate 22 for installing the guide rail strip 23, and the mounting plate 22 is installed on the bottom plate body 21 with countersunk head screws. The guide rail strip 23 is also installed on the mounting plate 22 with countersunk head screws; two sliding parts 24 moving away from or approaching each other are slidably installed on the guide rail strip 23, and a ball screw nut pair cooperating with the screw member 25 is installed on each sliding part 24; both ends of the screw member 25 are installed on the support bodies 26 fixed on the front and rear side surfaces of the bottom plate body 21 through bearings, and a power unit for driving the screw member 25 to rotate is fixedly provided on one of the support bodies 26; a group of two sliding parts 24 and two conductive sheets 32 are detachably connected by bolts, and the other group of two sliding parts 24 is connected to two clamping parts 27, and the clamping parts 27 are located outside the conductive sheets 32; In this embodiment, two clamping parts 27 and two conductive sheets 32 are cleverly and detachably mounted on two symmetrically arranged sliding parts 24. Through the operation of a power unit, preferably a servo motor, the lead screw part 25 rotates on two support bodies 26. Then, the symmetrically arranged sliding parts 24 slide away from or close to each other on the guide rail bars 23 of the mounting plate 22. As a result, the symmetrically arranged conductive sheets 32 come into contact with the core conductor 9, and the symmetrically arranged clamping parts 27 clamp and fix the core conductor 9, enabling the core conductor 9 located between the two sets of conductive sheets 32 to be stably and safely subjected to resistance detection processing. Preferably, the two corresponding conductive sheets 32 before and after are connected by a flexible wire.

[0021] Refer to Figure 4 and Figure 5 As shown, the lifting and conveying mechanism 4 includes a box body part 41. The box body part 41 is arranged along the height direction of the detection table 1, and the top of the box body part 41 is mounted on the bottom surface of the detection table 1 by welding or bolt fixing; a driving wheel 42 and a driven wheel 43. The driving wheel 42 and the driven wheel 43 are respectively rotatably mounted in the box body part 41 through a shaft rod and a bearing member, and the driving wheel 42 and the driven wheel 43 are respectively located at the inner bottom and the inner bottom of the box body part 41; a synchronous belt body 44. The synchronous belt body 44 is sleeved on the driving wheel 42 and the driven wheel 43, and the shaft rod corresponding to the driving wheel 42 is connected to the power unit fixedly arranged on the side surface of the box body part 41. In this embodiment, the power unit is a servo motor, and the box covers on the front and rear sides of the box body part 41 are mounted in a detachable manner, which is convenient for the installation and disassembly of the driving wheel 42, the driven wheel 43, and the synchronous belt body 44. Compared with using a cylinder or a hydraulic cylinder as a power source to drive the two sets of lifting wire assemblies 6 to rise or fall, this solution cleverly selects the cooperation of the synchronous belt body 44, the driven wheel 43, and the driving wheel 42 for the lifting and conveying mechanism 4, which can be installed in a concealed manner under the detection table 1 and will not occupy a large height space on the left and right sides of the detection table 1. Thus, when driving a set of link guiding mechanisms 5 and lifting wire assemblies 6 to rise or fall, the other set of link guiding mechanisms 5 and lifting wire assemblies 6 can move in the opposite direction in a synchronous state.

[0022] Refer to Figures 5 - 8As shown in the figure, the connecting rod guiding mechanism 5 includes a connecting block 51, a bending part 52, a guide sleeve 53 and a guide rod 54; the two connecting blocks 51 are placed in the accommodating cavity 411 formed by the outer side surface of the synchronous belt body 44 and the inside of the box body part 41, and the two connecting blocks 51 are installed in a front-back staggered and up-down symmetric manner on the synchronous belt body 44; when the synchronous belt body 44 rotates, one of the connecting blocks 51 will move upward or downward, and the other connecting block 51 will move downward or upward synchronously; first through cavities 412 are opened in the left and right wall surfaces of the box body part 41 along its height direction, and the two first through cavities 412 are in a front-back symmetric state and communicate with the two accommodating cavities 411; the bending part 52 preferably adopts an L-shaped square rod, so that the left and right horizontal square rods of the bending part 52 pass through the first through cavity 412, and one end of the left and right horizontal square rods of the bending part 52 is connected to the connecting block 51, and the other end of the left and right horizontal square rods passes through the first through cavity 412 and extends to the left and right side surfaces of the detection table 1; guide sleeves 53 are fixedly arranged on the front and rear bending parts 52 of each bending part 52, and the guide sleeves 53 are sleeved on the guide rods 54 fixedly arranged along the height direction on the lower surface of the detection table 1; In this embodiment, the bending part 52 preferably adopts an L-shaped square rod. The cooperation of the vertically fixed guide rod 54 and the guide sleeve 53 can play a role in guiding and supporting the horizontally extending bending part 52 in the vertical direction. At the same time, the horizontal square rod of the bending part 52 and the cavity wall of the first through cavity 412 are in mutual contact and fit, so that it can play a role in front-back limiting swing for the end part of the bending part 52 close to the synchronous belt body 44 that slides up and down. When the synchronous belt body 44 is running, it will only drive the bending part 52 to move vertically up and down through the connecting block 51, and will not cause the bending part 52 to deviate or skew during the vertical movement when the synchronous belt body 44 jumps during operation in the box body part 41.

[0023] Refer to Figure 6 and Figure 7As shown, the connecting rod guiding mechanism 5 further includes positioning pins 55, half-thread bolts 56, limiting parts 57, rolling balls 58, T-shaped parts 59 and first elastic elements 591; several positioning pins 55 are embedded in blind holes formed on the surface of the synchronous belt body 44, and the several positioning pins 55 are arranged in a double-row equidistant array on the synchronous belt body 44, and a threaded blind hole 551 for connecting with the half-thread bolt 56 is formed at the end of each positioning pin 55; a through hole 511 for accommodating the half-thread bolt 56 is formed on the connecting block 51, and a pin hole 512 for cooperating with the positioning pin 55 is formed on the surface of the through hole 511 close to the synchronous belt body 44, and a thread groove for cooperating with the half-thread bolt 56 is also formed on the hole wall of the through hole 511 close to the pin hole 512; a moving gap 413 is formed between the side wall of the connecting block 51 away from the synchronous belt body 44 and the inner wall of the box body part 41, and the width of the moving gap 413 is the same as the length of the positioning pin 55 protruding from the surface of the synchronous belt body 44; second through cavities 414 for the screw rod of the half-thread bolt 56 to pass through are formed in the front and rear sides of the box body part 41 along the height direction, and a limiting part 57 for limiting the half-thread bolt 56 is slidably attached to the front and rear sides of the box body part 41 at the second through cavities 414, so that the hexagonal head of the half-thread bolt 56 is located outside the box body part 41; rolling balls 58 that are in rolling contact with the surface of the box body part 41 are rotatably installed on the surface of the limiting part 57 close to the box body part 41; a T-shaped sliding groove 513 for the T-shaped part 59 to slide is formed on the side wall of the connecting block 51 connected to the bending part 52, the tail of the T-shaped part 59 is connected with a first elastic element 591, and the first elastic element 591 applies a force to the connecting block 51 in the direction close to the synchronous belt body 44; In this embodiment, since the detection times of the stranded wire core conductors 9 with different diameters are different during resistance detection, it is necessary to adjust the height of the lifting wire assembly 6 moving vertically on the side of the detection table 1 according to the diameter of the detected wire core conductor 9; Therefore, when the distance between the upper and lower connecting blocks 51 is increased, the moving distance of the lifting wire assembly 6 in the height direction on both sides of the detection table 1 is increased; taking the adjustment of the connecting block 51 on the front side of the synchronous belt body 44 inside the box body part 41 as an example, at this time, the two half-thread bolts 56 on the outer front side of the box body part 41 can be loosened, so that the screw end of the half-thread bolt 56 withdraws from the threaded blind hole 551 of the corresponding connected positioning pin 55, and at this time, the half-thread bolt 56 continues to be threadedly connected to the connecting block 51, and then the half-thread bolt 56 is pulled outwards, so that the connecting block 51 moves towards the inner front side of the box body part 41, so that the two positioning pins 55 are disengaged from the pin holes 512. When the connecting block 51 slides, the T-shaped part 59 connected to the bending part 52 will slide relatively in the T-shaped chute 513, and preferably the first elastic element 591 of the spring will be compressed. After the positioning pin 55 is completely disengaged from the connecting block 51, at this time, the limiting part 57 is pushed downwards, so that the half-thread bolt 56 drives the connecting block 51 to slide downwards inside the box body part 41, and at this time, the bending part 52 will synchronously drive the lifting wire assembly 6 to descend to a suitable height. When the two pin holes 512 opened on the descending connecting block 51 are aligned with the other two positioning pins 55, at this time, the half-thread bolt 56 is twisted, so that the connecting block 51 slides towards the surface of the synchronous belt body 44, and at this time, the first elastic element 591 will apply a force to the connecting block 51 to slide towards the synchronous belt body 44, so that the connecting block 51 can be accurately inserted and matched with the positioning pin 55, and then the half-thread bolt 56 is continuously twisted, so that the half-thread bolt 56 is connected to the positioning pin 55, thereby facilitating the quick and accurate connection of the adjusted connecting block 51 to the synchronous belt body 44. The connecting block 51 located at the rear side of the synchronous belt body 44 can be adjusted synchronously in the above manner, thereby facilitating the quick adjustment of the distance between the two connecting blocks 51, so that the lifting wire assembly 6 can perform wire pressing and wire releasing operations on wire core conductors 9 with different diameters; In this solution, the connecting block 51 inside the box body 41 and the synchronous belt body 44 are ingeniously connected by the protruding half-thread bolt 56. When the synchronous belt body 44 operates to drive the connecting block 51 to slide, since the limiting part 57 is in rolling friction contact with the outer wall of the box body 41 through the rolling ball 58, and the half-thread bolt 56 can slide up and down in the second through cavity 414, it will not interfere with the synchronous belt body 44 to drive the bending part 52 to slide up and down under the detection table 1 through the connecting block 51. The positioning pin 55 and the connecting block 51 are inserted and matched, and are connected to each other by the half-thread bolt 56, so that the connecting block 51 can quickly adjust its position on the outer side of the synchronous belt body 44, thereby being able to adjust the distance between the two connecting blocks 51 that are symmetrical before and after and up and down, facilitating the lifting wire assembly 6 to perform wire pressing and wire releasing operations on wire core conductors 9 with different diameters; when the connecting block 51 slides on the outer side of the synchronous belt body 44, since the bending part 52 is connected to the T-shaped chute 513 through the sliding fit of the T-shaped part 59, the bending part 52 limited by the second through cavity 414 before and after will not interfere with the disconnection of the insertion connection between the connecting block 51 and the positioning pin 55, and when the connecting block 51 slides up and down, the cooperation connection between the T-shaped part 59 and the T-shaped chute 513 can also make the bending part 52 slide up and down synchronously, enabling the lifting wire assembly 6 to accurately perform wire pressing or wire releasing operations on the wire core conductor 9.

[0024] Refer to Figure 8 As shown, the lifting wire assembly 6 includes a T-shaped bracket 61, a U-shaped seat 62, a pressing roller 63, a tension roller 64 and a tensioning assembly; the T-shaped bracket 61 is fixedly arranged on the outer side of the end of the bending part 52, so that the T-shaped bracket 61 is used to suspend and support the U-shaped seat 62 on both sides of the wire core moving direction of the detection table 1; a pressing roller 63 is rotatably arranged on the U-shaped seat 62 near the U-shaped opening through a shaft rod, and a tension roller 64 is correspondingly arranged inside the pressing roller 63; both ends of the tension roller 64 are installed on the U-shaped seat 62 through the tensioning assembly; In this embodiment, the wire core conductor 9 is passed through between the pressing roller 63 and the tension roller 64, and the rotatable pressing roller 63 is ingeniously fixed at the U-shaped opening of the U-shaped seat 62, while the inner tension roller 64 is slidably installed on the U-shaped seat 62 through the tensioning assembly. When the bending part 52 drives the U-shaped seat 62 to vertically descend, at this time only the pressing roller 63 can play a role in pressing the wire core conductor 9, and the rotatable tension roller 64 only plays a role in tensioning and guiding the wire core conductor 9, so that when the wire core conductor 9 is pressed downward, the wire core conductor 9 will not contact the U-shaped seat 62, and the tensioning assembly can also adjust the distance between the tension roller 64 and the pressing roller 63. The cooperation between the pressing roller 63 and the tension roller 64 can perform downward wire pressing or upward wire releasing operations on wire core conductors 9 with different diameters.

[0025] Refer to Figure 8As shown in the figure, the tensioning assembly includes a sliding block 65 slidably placed in a sliding guide groove formed on the U-shaped seat 62. A bearing member connected to the shaft rod of the tensioning roller 64 is installed on the sliding block 65. A regulating screw 66 penetrating and protruding from the U-shaped seat 62 is connected to the side wall of the sliding block 65, and a nut member 67 is connected to the regulating screw 66. A second elastic element 68 is connected between the side wall of the sliding block 65 and the groove wall of the sliding guide groove, and the second elastic element 68 is sleeved on the regulating screw 66; In this embodiment, by twisting the nut member 67 located on the back of the U-shaped seat 62, the regulating screw 66 can adjust the sliding distance of the sliding block 65 in the sliding guide groove, and the second elastic element 68 preferably in the form of a spring can apply a force to the sliding block 65, thereby facilitating the adjustment of the distance between the tensioning roller 64 and the pressing roller 63, and facilitating the downward pressing or upward unwinding of the wire core conductor 9 with different diameters.

[0026] Refer to Figure 1 and Figure 2 As shown in the figure, a cover 7 is detachably installed on the upper surface of the detection table 1. Thread through holes for the wire core to pass through are formed on the left and right side walls of the cover 7, and sealing rings 71 are installed in the thread through holes. A DC resistance bridge 3 is installed on the upper surface of the cover 7, and wire guide wheels 8 are installed on the top surface of the detection table 1 on both sides of the cover 7; In this embodiment, the installation of the cover 7 enables the wire core conductor 9 to be subjected to resistance detection in a constant temperature environment on the detection table 1, thereby improving the accuracy of the resistance detection of the wire core conductor 9 after stranding. The setting of the wire guide wheels 8 facilitates the stable entry of the wire core conductor 9 from the lifting wire guiding assembly 6 into the cover 7, or the stable transition of the wire core conductor 9 output from the cover 7 to the lifting wire guiding assembly 6.

[0027] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A device for detecting the core resistance of a cross-linked polyethylene insulated power cable, comprising a detection table, characterized in that: Symmetrical sliding components, four groups of the symmetrical sliding components are placed on the top surface of the detection table and every two groups of the symmetrical sliding components are close to each other. In two groups of the symmetrical sliding components close to each other, one group of the symmetrical sliding components is used to drive two conductive sheets to move closer to or away from each other, and one group of the symmetrical sliding components is used to drive two clamping parts to move closer to or away from each other; DC resistance bridge, two connecting wires of the DC resistance bridge installed on the detection table are connected to each group of conductive sheets; Lifting and conveying mechanism, the lifting and conveying mechanism is placed at the bottom of the detection table, and two groups of misaligned connecting rod guiding mechanisms are installed on the lifting and conveying mechanism; Lifting wire components, two groups of the lifting wire components are placed on both sides of the detection table in the core moving direction, and the two groups of lifting wire components are respectively connected to the two groups of misaligned connecting rod guiding mechanisms.

2. The core resistance detection device of a cross-linked polyethylene insulated power cable according to claim 1, characterized in that, The symmetrical sliding component includes a bottom plate body fixed on the upper surface of the detection table, and an installation plate for installing a guide rail bar is fixedly arranged on the top surface of each bottom plate body; Two sliding parts moving away from or close to each other are slidably installed on the guide rail bars, and a ball screw nut pair cooperating with a screw member is installed on each sliding part; Both ends of the screw member are installed on the support bodies fixedly arranged on the front and rear side surfaces of the bottom plate body through bearings, and a power unit for driving the screw member to rotate is fixedly arranged on one of the support bodies; One group of two sliding parts is connected to two conductive sheets, and the other group of two sliding parts is connected to two clamping parts, and the clamping parts are located on the outer side direction of the conductive sheets.

3. The core resistance detection device for a cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The lifting and conveying mechanism includes a box body part, the box body part is arranged along the height direction of the detection table, and it is connected to the bottom surface of the detection table; A driving wheel and a driven wheel, the driving wheel and the driven wheel are respectively rotatably installed in the box body part through a shaft rod and a bearing member, and the driving wheel and the driven wheel are respectively located at the inner bottom and the inner bottom of the box body part; A synchronous belt body, the synchronous belt body is sleeved on the driving wheel and the driven wheel, and the shaft rod corresponding to the driving wheel is connected to the power unit fixedly arranged on the side surface of the box body part.

4. The wire core resistance detection device for a cross-linked polyethylene insulated power cable according to claim 3, characterized in that, The connecting rod guiding mechanism includes a connecting block, a bending part, a guide sleeve and a guide rod; Two connecting blocks are placed in the accommodating cavity formed by the outer side surface of the synchronous belt body and the inside of the box body part, and the two connecting blocks are installed in a front and rear staggered and upper and lower symmetrical manner on the synchronous belt body; When the synchronous belt body rotates, one of the connecting blocks will move up or down, and the other connecting block will move down or up synchronously; First through cavities are respectively opened on the left and right wall surfaces of the box body part along its height direction, and the two first through cavities are in a front and rear symmetrical state and communicate with the two accommodating cavities; The bending part passes through the first through cavity, and one end of the bending part is connected to the connecting block, and the other end of the bending part extends to the left and right side surfaces of the detection table along the length direction of the detection table; A guide sleeve is fixedly arranged at the extending end of each bending part, and the guide sleeve is sleeved on the guide rod for guiding along the height direction on the lower surface of the detection table.

5. The core resistance detection device for a cross-linked polyethylene insulated power cable according to claim 4, characterized in that, The connecting rod guiding mechanism further includes a positioning pin, a half-thread bolt, a limiting part, a rolling ball, a T-shaped part and a first elastic element; A plurality of the positioning pins are embedded in blind holes formed on the surface of the synchronous belt body, and the plurality of the positioning pins are arranged in a rectangular array on the synchronous belt body, and a threaded blind hole for connecting with a half-thread bolt is formed at the end of each positioning pin; A through hole for accommodating the half-thread bolt is formed on the connecting block, and a pin hole for cooperating with the positioning pin is formed on the surface of the through hole close to the synchronous belt body, and a thread groove for cooperating with the half-thread bolt is also formed on the hole wall of the through hole close to the pin hole; A moving gap is formed between the side wall of the connecting block far from the synchronous belt body and the inner wall of the box body part, and the width of the moving gap is the same as the length of the positioning pin protruding from the surface of the synchronous belt body; Second through cavities for facilitating the screw rod of the half-thread bolt to pass through are formed in the front and rear side surfaces of the box body part in the height direction, and a limiting part for limiting the half-thread bolt is slidably attached to the front and rear side surfaces of the box body part at the position of the second through cavity, so that the hexagonal head of the half-thread bolt is located outside the box body part; A rolling ball that is in rolling contact with the surface of the box body part is rotatably installed on the surface of the limiting part close to the box body part; A T-shaped sliding groove for the T-shaped part to slide is formed on the side wall of the connecting block connected to the bending part, and a first elastic element is connected to the tail of the T-shaped part, and the first elastic element applies a force to the connecting block in the direction close to the synchronous belt body.

6. The core resistance detection device for a cross-linked polyethylene insulated power cable according to claim 4, characterized in that, The lifting wire assembly includes a T-shaped bracket, a U-shaped seat, a pressing roller, a tensioning roller and a tensioning assembly; The T-shaped bracket is fixedly arranged on the outer side surface of the end of the bending part, so that the T-shaped bracket is used to suspend and support the U-shaped seat on both sides of the wire core moving direction of the detection table; A pressing roller is rotatably arranged at the position of the U-shaped seat close to the U-shaped opening through a shaft rod, and a tensioning roller is correspondingly arranged inside the pressing roller; Both ends of the tensioning roller are installed on the U-shaped seat through a tensioning assembly.

7. The core resistance detection device for a cross-linked polyethylene insulated power cable according to claim 6, characterized in that: The tensioning assembly includes a sliding square block slidably placed in a sliding guide groove formed on the U-shaped seat, a bearing part connected to the shaft rod of the tensioning roller is installed on the sliding square block, an adjusting screw rod penetrating and extending out of the U-shaped seat is connected to the side wall of the sliding square block, and a nut part is connected to the adjusting screw rod. A second elastic element is connected between the side wall of the sliding square block and the groove wall of the sliding guide groove, and the second elastic element is sleeved on the adjusting screw rod.

8. The wire core resistance detection device for a cross-linked polyethylene insulated power cable according to claim 1, characterized in that, A cover body is detachably installed on the upper surface of the detection table. Thread through holes for the wire core to pass through are formed on the left and right side walls of the cover body, and sealing rings are installed in the thread through holes. A DC resistance bridge is installed on the upper surface of the cover body, and wire guide wheels are installed on the top surface of the detection table on both sides of the cover body.

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