CN116593783A - High-voltage cable insulation resistance detection device and detection method - Google Patents
High-voltage cable insulation resistance detection device and detection method Download PDFInfo
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- CN116593783A CN116593783A CN202310878574.8A CN202310878574A CN116593783A CN 116593783 A CN116593783 A CN 116593783A CN 202310878574 A CN202310878574 A CN 202310878574A CN 116593783 A CN116593783 A CN 116593783A
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- 238000001514 detection method Methods 0.000 title claims abstract description 94
- 238000009413 insulation Methods 0.000 title claims abstract description 54
- 238000001125 extrusion Methods 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to the technical field of high-voltage cables, in particular to a high-voltage cable insulation resistance detection device and a detection method, wherein the high-voltage cable insulation resistance detection device comprises a detection main body and a stabilizing mechanism fixedly arranged on the surface of the detection main body, and a plurality of groups of elastic contact pieces are fixedly arranged on the inner wall of an outer shell at equal intervals; the extrusion mechanism comprises connecting rods symmetrically arranged on the bottom surface of the outer shell, and one end of each connecting rod penetrates through the limiting plate and is connected with a trapezoid block; the detection mechanism comprises an inner shell which is connected inside the outer shell in a sliding way and one end of which is provided with a notch. According to the invention, through the matched use of all parts, when the insulation resistance of the high-voltage cable is detected, the position of the deflector rod is adjusted, so that the extrusion mechanism is triggered to clamp and keep stable the wire cores of the high-voltage cable, simultaneously, the wire cores of three groups of the wire cores of the high-voltage cable are clamped in pairs and the insulation resistance is detected, the high-efficiency detection is realized, and the workload of detection personnel is reduced.
Description
Technical Field
The invention relates to the technical field of high-voltage cables, in particular to a high-voltage cable insulation resistance detection device and a detection method.
Background
A high voltage cable is one of power cables, and is used for transmitting between 1kv and 1000kv, and is mostly used for power transmission and distribution. And the high-voltage cable needs to be detected before being put into use, such as detection of conductivity, insulation resistance and the like, so as to judge whether the produced high-voltage cable is qualified or not.
However, when the insulation resistance of the high-voltage cable is detected, the insulation resistance of the high-voltage cable is usually detected manually by adopting a rocking meter, namely three wire cores are clamped in sequence by wire clamps, and then the rocking meter is rocked to start to measure the insulation resistance of the high-voltage cable. However, in the detection process, the chuck needs to be manually replaced, so that the phenomenon of frequent chuck replacement occurs in the measurement process, the detection efficiency is low, and the workload of detection personnel is increased.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects existing in the prior art, the invention provides a high-voltage cable insulation resistance detection device and a detection method, which can effectively solve the problems of low efficiency and increased workload of detection personnel when the insulation resistance of a high-voltage cable is detected in the prior art.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the invention provides a high-voltage cable insulation resistance detection device which comprises a detection main body, wherein the upper surface of the detection main body is penetrated and provided with a first chute which is continuously bent, a limiting plate which is symmetrically arranged on the inner wall of the first chute, and a deflector rod which is in sliding fit with the first chute, and the high-voltage cable insulation resistance detection device is characterized by also comprising a stabilizing mechanism which is fixedly arranged on the surface of the detection main body, wherein an outer shell is in sliding fit inside the detection main body, and a plurality of groups of elastic contact pieces are arranged on the inner wall of the outer shell at equal intervals; the extrusion mechanism is arranged in the detection main body and comprises a connecting rod, one end of the connecting rod is connected with a trapezoid block, the trapezoid block is elastically connected with the limiting plate through a reset spring, a bump is arranged on one side of the trapezoid block, and an inclined plane is formed in the surface of the bump; the detection mechanism is used for measuring cable resistance and comprises an inner shell which is connected with the inner part of the outer shell in a sliding way and provided with a notch at one end, a first extrusion rod is fixedly arranged on the outer surface of the inner shell, a sliding rod is connected with the inner part of the inner shell in a sliding way, and a second extrusion rod arranged in the notch is fixedly arranged on the outer surface of the sliding rod.
Further, stabilizing mean includes equidistant fixed mounting at the first arc of detecting the main part upper surface, first arc has the second arc through spacing post sliding connection, just first arc with the intrados of second arc is all fixed bonding has the abrasionproof pad, the montant is installed to the lower extreme symmetry of second arc, the lower extreme of montant pierces through first arc and detects the main part and fixedly connected with diaphragm, the montant is fixed with the surface connection who detects the main part through the connecting spring that its surface cover was established.
Further, the outer part of the deflector rod is sleeved with a disc, and a plurality of groups of bulges are fixedly arranged on the surface of the disc at equal intervals.
Further, a plurality of groups of through holes are formed in the surface of the outer shell in an equidistant penetrating manner, and a second chute with the same shape as the first chute is formed in the upper surface of the outer shell in a penetrating manner.
Further, the elastic contact piece is in a Z-shaped structure, and a convex ring is fixedly arranged on one side, close to the through hole, of the elastic contact piece.
Further, the surface of the inner shell is provided with a bar-shaped groove in a penetrating mode, the bar-shaped groove is in sliding fit with the deflector rod, and the inner shell is connected with the inner wall of the outer shell through an elastic piece.
Further, the tail ends of the first extrusion rod and the second extrusion rod are positioned on the same horizontal line, and the tail ends are in extrusion fit with the elastic contact pieces.
Further, the jack is offered to the upper surface of slide bar, and the slide bar is fixed with the inner wall connection of interior casing through circular spring.
Further, the elastic piece comprises a strip-shaped plate which is in sliding fit with the sliding groove formed in one side of the inner shell, and the strip-shaped plate is fixedly connected with the inner wall of the outer shell through symmetrically arranged compression springs.
A method for detecting insulation resistance of a high-voltage cable, the method comprising the steps of:
s1, firstly, pulling off an external insulating material of a high-voltage cable to be subjected to insulation resistance detection, and then sequentially arranging three inner wire cores and peeling the end parts to enable copper wires inside the wire cores to be exposed outside;
s2, respectively placing the three wire cores which are finished in arrangement on a first arc-shaped plate, and inserting copper wires exposed outside into detection holes formed in the surface of the detection main body;
s3, pushing the deflector rod in a fixed state, driving the extrusion mechanism to start to act through the action of the outer shell, enabling the transverse plate to start to drive the second arc plate to start to press down, clamping and fixing the wire cores, simultaneously driving the inner shell to start to act, driving the first extrusion rod and the second extrusion rod to start to extrude the first group and the second group of elastic contact pieces, enabling a convex ring arranged on one side of the elastic contact pieces to be in closer contact with copper wires, and starting to measure insulation resistance of the first group and the second group of wire cores, so that accuracy of measurement results is ensured;
s4, after the measurement of the first wire core and the second wire core is completed, the deflector rod is pulled upwards, so that the deflector rod is separated from the jack, the second extrusion rod can leave the second group of elastic contact pieces under the action of the round spring to start extrusion of the third group of elastic contact pieces, insulation resistance of the first group of wire cores and the third group of wire cores is measured, after the measurement of the first group of wire cores and the third group of wire cores is completed, the deflector rod is pulled to move transversely, the first extrusion rod fixedly mounted on the surface of the inner shell is driven to leave the first group of elastic contact pieces, and the second group of elastic contact pieces are extruded, and insulation resistance between the second group of wire cores and the third group of wire cores is measured.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
according to the invention, the extrusion mechanism and the detection mechanism are arranged, so that when the insulation resistance of the high-voltage cable is detected, the deflector rod can be pushed firstly, so that the deflector rod drives the outer shell to act and simultaneously starts to trigger the extrusion mechanism, the stabilizing mechanism starts to clamp the wire cores of the high-voltage cable, the wire cores are in a stable state, then the positions of the deflector rod are regulated, the wire cores of three groups of the high-voltage cable are clamped and detected in pairs, the high-efficiency detection is realized, and the workload of detection personnel is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic elevational view of the overall structure of the present invention;
FIG. 2 is a side view of the overall structure of the present invention;
FIG. 3 is a schematic front view of the stabilizing mechanism of the present invention;
FIG. 4 is a schematic cross-sectional view of a planar structure of a test body according to the present invention;
FIG. 5 is a schematic elevational view of the outer housing structure of the present invention;
FIG. 6 is an enlarged schematic view of the structure A in FIG. 4 according to the present invention;
FIG. 7 is a schematic view of an extrusion structure of the present invention;
FIG. 8 is a schematic cross-sectional view of an outer housing of the present invention;
FIG. 9 is a schematic view of an elastic contact structure according to the present invention;
FIG. 10 is a schematic view showing the structural cooperation between the inner housing and the elastic member according to the present invention;
FIG. 11 is an exploded view of the detection mechanism of the present invention;
fig. 12 is an enlarged schematic view of the structure B in fig. 11 according to the present invention.
Reference numerals in the drawings represent respectively: 1. a detection body; 101. a first chute; 102. a limiting plate; 2. a stabilizing mechanism; 201. a first arcuate plate; 202. a second arcuate plate; 203. an abrasion-proof pad; 204. a vertical rod; 205. a cross plate; 206. a connecting spring; 3. a deflector rod; 301. a disc; 302. a protrusion; 4. an outer housing; 401. a through hole; 402. a second chute; 5. an extrusion mechanism; 501. a connecting rod; 502. a trapezoid block; 503. a return spring; 504. a bump; 505. an inclined plane; 6. an elastic contact; 601. a convex ring; 7. a detection mechanism; 701. an inner housing; 702. a first extrusion rod; 703. a slide bar; 7031. a jack; 704. a circular spring; 705. a second extrusion rod; 8. an elastic member; 801. a strip-shaped plate; 802. compressing the spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Examples: a high voltage cable insulation resistance detection device, referring to fig. 1-12; the high-voltage cable detecting device comprises a detecting main body 1, and is used for detecting the insulation resistance of the high-voltage cable and judging whether the high-voltage cable is qualified or not. The upper surface of the detection main body 1 is provided with a continuously bent first chute 101 in a penetrating way, and the first chute 101 can play a role in guiding and limiting and can play a role in fixing at the same time; and the limiting plates 102 are symmetrically arranged on the inner walls of the limiting plates 102, and are used for limiting the parts, so that the parts can be ensured to move according to the fixed track.
The deflector rod 3 is in sliding fit with the first chute 101, and the deflector rod 3 is arranged, so that connection among all wire cores in the high-voltage cable detection process can be controlled, and the aim of rapidly detecting insulation resistance is fulfilled;
referring to fig. 1-3, the wire core detection device further comprises a stabilizing mechanism 2 fixedly mounted on the surface of the detection main body 1, and the wire core can be clamped and kept stable in the detection process by arranging the stabilizing mechanism 2, so that the situation that the wire core falls off due to rotation of a handle in the detection process of the detection main body 1 and the detection result and the detection efficiency are affected is avoided.
Wherein, stabilizing mean 2 includes equidistant fixed mounting at the first arc 201 that detects main part 1 upper surface, and first arc 201 has second arc 202 through spacing post sliding connection, through setting up first arc 201 and second arc 202, and then can adapt to the shape of sinle silk better through both combinations for the sinle silk keeps stable constantly in the testing process. The inner cambered surfaces of the first arc-shaped plate 201 and the second arc-shaped plate 202 are fixedly adhered with the anti-abrasion pad 203, and the clamped wire core can be further protected through the anti-abrasion pad 203, so that abrasion is avoided.
Wherein, the lower end of the second arc plate 202 is symmetrically provided with a vertical rod 204, and the vertical rod 204 is arranged, so that the second arc plate 202 can be guided and driven to lift; the lower end of the vertical rod 204 penetrates through the first arc-shaped plate 201 and the detection main body 1 and is fixedly connected with a transverse plate 205, and a plurality of groups of second arc-shaped plates 202 can be connected into a whole through the transverse plate 205, so that the second arc-shaped plates 202 can be synchronously driven to act; the connecting spring 206 sleeved on the surface of the vertical rod 204 is fixedly connected with the surface of the detection main body 1, and when the connecting spring 206 is arranged and the second arc-shaped plate 202 is driven to act through the vertical rod 204, the connecting spring 206 can be driven to deform, so that a reaction force is generated, and the subsequent automatic resetting of the second arc-shaped plate 202 is facilitated.
The disc 301 is sleeved outside the deflector rod 3, and the disc 301 is arranged, so that the deflector rod 3 is prevented from being directly pulled out of the detection main body 1; a plurality of groups of protrusions 302 are fixedly arranged on the surface of the disc 301 at equal intervals, and the protrusions 302 are arranged to play a role of clamping;
referring to fig. 4-5, 8 and 9, an outer casing 4 is slidably fitted in the detection main body 1, and a clamping groove is formed in the inner top surface of the outer casing 4 corresponding to the position of the protrusion 302, so as to be in clamping fit with the protrusion 302, thereby driving the outer casing 4 to move; a plurality of groups of through holes 401 are formed in the surface of the outer shell 4 at equal intervals, and three groups of through holes 401 are formed in the surface of the outer shell 4 in a penetrating manner, so that the three groups of through holes can correspond to the wire cores one by one, and accuracy of an insulation resistance detection result is realized; the upper surface of the outer shell 4 is provided with a second chute 402 which has the same shape as the first chute 101 in a penetrating way, and the second chute 402 has the same function as the first chute 101, thereby being convenient for the movement of the deflector rod 3 and guiding and limiting the deflector rod 3;
the inner wall of the outer shell 4 is fixedly provided with a plurality of groups of elastic contact pieces 6 at equal intervals, the elastic contact pieces 6 are in a Z-shaped structure, and the elastic contact pieces 6 can be in contact with copper wires in the wire cores, so that insulation resistance detection of the high-voltage cable is facilitated; a convex ring 601 is fixedly arranged on one side of the elastic contact 6, which is close to the through hole 401, and the convex ring 601 is arranged, so that the elastic contact can be fully contacted with a copper wire of a wire core, and the accuracy of a detection result is ensured;
referring to fig. 4 and fig. 6-fig. 7, by arranging the extrusion mechanism 5 and arranging the extrusion mechanism in the detection main body 1, the extrusion mechanism is used for driving the stabilizing mechanism 2 to act, so as to realize clamping of the wire core and ensure that the wire core is kept stable in the process of detecting the insulation resistance;
the extruding mechanism 5 comprises two groups of connecting rods 501, wherein the connecting rods 501 are symmetrically arranged on the bottom surface of the outer shell 4, the connecting rods 501 are of an L-shaped structure and play a role in connection, one end of each connecting rod 501 is connected with a trapezoid block 502, and it is worth to say that each trapezoid block 502 is a right-angled trapezoid block 502, and one end of each connecting rod 501 penetrates through the inside of the limiting plate 102 and is fixedly connected with each trapezoid block 502; the trapezoid block 502 is arranged, so that extrusion can be achieved, the trapezoid block 502 is elastically connected with the limiting plate 102 through the reset spring 503, the reset spring 503 is sleeved on the surface of the connecting rod 501, and the trapezoid block 502 can be driven to move through the characteristic that the reset spring 503 can generate a reaction force;
referring to fig. 6-7, a bump 504 is disposed on one side of the trapezoid block 502, the bump 504 is fixedly connected with an end of the transverse plate 205, an inclined plane 505 is disposed on a surface of the bump 504, and the bump 504 with the inclined plane 505 is disposed on the surface of the bump, so that the inclined plane 505 contacts with an inclined long surface of the trapezoid block 502 to form a sliding fit relationship, and when the trapezoid block 502 is moved by a reaction force generated by the return spring 503, the inclined long surface of the trapezoid block 502 starts to be matched with the inclined plane 505, so that the transverse plate 205 moves downwards, and further the second arc plate 202 is driven to move downwards synchronously, so as to clamp a wire core.
Referring to fig. 8 and 11, through setting up detection mechanism 7, make it set up in the inside of shell body 4, and then can realize the two-by-two combination of different sinle silk through adjusting its action, be convenient for carry out insulation resistance's detection to high-voltage cable fast for detection efficiency reduces staff's work load.
The detection mechanism 7 comprises an inner shell 701 which is slidably connected inside the outer shell 4 and one end of which is provided with a notch, and the inner shell 701 is arranged to facilitate the installation of part of parts; the surface of the inner shell 701 is provided with a bar-shaped groove in a penetrating way, the bar-shaped groove is in sliding fit with the deflector rod 3, and the deflector rod 3 can conveniently move in a short distance through the bar-shaped groove, so that the deflector rod 3 can be conveniently fixed subsequently;
the inner housing 701 is connected with the inner wall of the outer housing 4 through an elastic piece 8, and the inner housing 701 can be driven to move back and forth in the outer housing 4 through the elastic piece 8; the first extrusion rod 702 is fixedly arranged on the outer surface of the inner shell 701, and the first extrusion rod 702 is arranged, so that the first extrusion rod is extruded with the first elastic contact piece 6 in the initial state, and the elastic contact piece 6 is contacted with copper wires in the wire core;
meanwhile, a sliding rod 703 is slidably connected in the inner casing 701, the sliding rod 703 is fixedly connected with the inner wall of the inner casing 701 through a circular spring 704, and the sliding rod 703 is driven to move through the reaction force generated by the circular spring 704 due to the fact that the circular spring 704 is arranged and the initial state of the circular spring 704 is in a compressed state; the jack 7031 is formed in the upper surface of the sliding rod 703, and through the jack 7031, plug-in fit with the shift rod 3 can be formed, so that the shift rod 3 can fix the sliding rod 703.
The outer surface of the sliding rod 703 is fixedly provided with a second extrusion rod 705 arranged in the notch, the tail ends of the first extrusion rod 702 and the second extrusion rod 705 are positioned on the same horizontal line, and the tail ends are in extrusion fit with the elastic contact pieces 6, and the second extrusion rod 705 is arranged so as to extrude the second group of elastic contact pieces 6, so that two groups of three groups of wire cores are connected, and insulation resistance is measured.
The elastic piece 8 comprises a strip-shaped plate 801 in sliding fit with a sliding groove formed in one side of the inner shell 701, and the strip-shaped plate 801 is arranged to further perform sliding fit with the inner shell 701, so that the limiting and guiding functions are achieved, and deviation of the inner shell 701 in the moving process is avoided; the strip-shaped plate 801 is fixedly connected with the inner wall of the outer casing 4 through symmetrically arranged compression springs 802, and the inner casing 701 can be driven to move through the arrangement of the compression springs 802.
Specifically, when the insulation resistance of the high-voltage cable needs to be detected, three groups of wire cores in the high-voltage cable are arranged, placed corresponding to the positions of the first arc plates 201 one by one, one end of each wire core is inserted into a detection port formed in the detection main body 1, then the deflector rod 3 matched with the first chute 101 in a clamping manner is stirred, when the deflector rod 3 is in a clamping-released state, the wire cores on the first arc plates 201 start to move forwards under the action of the compressed compression spring 802, and then the whole outer shell 4 is driven to move synchronously, in the synchronous moving process of the outer shell 4, the trapezoidal blocks 502 connected through the connecting rods 501 are driven to start to act, the inclined planes 505 start to extrude, the protrusions 302 drive the transverse plates 205 to move downwards, and then the second arc plates 202 are driven to move downwards integrally and compress the connection springs 206, so that the wire cores on the first arc plates 201 start to clamp and fix, and the stability of the wire cores in the detection process is ensured.
In the process of clamping the wire core, the first extrusion rod 702 and the second extrusion rod 705 fixedly mounted on the surface of the inner housing 701 start to synchronously extrude the first group of elastic contact pieces 6 and the second group of elastic contact pieces 6, the elastic contact pieces 6 deform, the convex ring 601 fixedly mounted on one side of the elastic contact pieces fully contacts copper wires in the wire core, the first two groups of the three groups of wire cores are connected together so as to detect insulation resistance, after the detection of the first two groups of wire cores is completed, the deflector rod 3 is lifted upwards, when the deflector rod 3 starts to move out of the jack 7031, the slide rod 703 drives the second extrusion rod 705 to move under the reaction force generated by the circular spring 704 to start to extrude the third group of elastic contact pieces 6, and the second group of elastic contact pieces 6 recover to be original, at this moment, the wire cores of the first group and the third group of wire cores are connected, and then the handle on one side of the detection main body 1 is rotated to start to detect the insulation resistance.
After the detection of the first and third groups of wire cores is completed, the deflector rod 3 is lifted, the protrusions 302 are clamped with the clamping grooves, the deflector rod 3 is pulled to slide in the first sliding groove 101, when the inner shell 701 and the sliding rod 703 form an initial state again, the deflector rod 3 is pressed into the jack 7031 again, the inner shell 701 extrudes the second group of elastic contact pieces 6, the first group of elastic contact pieces 6 are restored to the original position, the second and third groups of wire cores are connected at the moment, and then the insulation resistance is measured by repeating the previous steps. After the measurement is completed, the deflector rod 3 is directly pulled to reset.
The method for detecting the insulation resistance of the high-voltage cable comprises the following steps:
s1, firstly, pulling off an external insulating material of a high-voltage cable to be subjected to insulation resistance detection, and then sequentially arranging three inner wire cores and peeling the end parts to enable copper wires inside the wire cores to be exposed outside;
s2, respectively placing the three wire cores which are finished in arrangement on a first arc-shaped plate 201, and inserting copper wires exposed outside into detection holes formed in the surface of a detection main body 1;
s3, pushing the deflector rod 3 in a fixed state, driving the extrusion mechanism 5 to start to act through the action of the outer shell 4, enabling the transverse plate 205 to start to drive the second arc plate 202 to start to press down, clamping and fixing the wire cores, driving the inner shell 701 to start to act, driving the first extrusion rod 702 and the second extrusion rod 705 to start to extrude the first group and the second group of elastic contact pieces 6, enabling the convex ring 601 arranged on one side of the elastic contact pieces 6 to be in closer contact with copper wires, and starting to measure insulation resistance of the first group and the second group of wire cores, so that accuracy of measurement results is ensured;
s4, after the measurement of the first wire core and the second wire core is completed, the deflector rod 3 is pulled upwards, so that the deflector rod 3 is separated from the jack 7031, the second extrusion rod 705 can leave the second group of elastic contact pieces 6 under the action of the round spring 704 to start to extrude the third group of elastic contact pieces 6, the insulation resistance of the first group of wire cores and the third group of wire cores is measured, after the measurement of the first group of wire cores and the third group of wire cores is completed, the deflector rod 3 is pulled to move transversely, the first extrusion rod 702 fixedly installed on the surface of the inner shell 701 is started to leave the first group of elastic contact pieces 6, and the second group of elastic contact pieces 6 is started to be extruded, so that the insulation resistance between the second group of wire cores and the third group of wire cores is measured.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The high-voltage cable insulation resistance detection device comprises a detection main body (1), wherein the upper surface of the detection main body (1) is penetrated and provided with a first chute (101) which is continuously bent, a limiting plate (102) which is symmetrically arranged on the inner wall of the first chute, and a deflector rod (3) which is in sliding fit with the first chute (101), and the high-voltage cable insulation resistance detection device is characterized by further comprising a stabilizing mechanism (2) which is fixedly arranged on the surface of the detection main body (1), an outer shell (4) is in sliding fit inside the detection main body (1), and a plurality of groups of elastic contact pieces (6) are arranged on the inner wall of the outer shell (4) at equal intervals;
the extrusion mechanism (5) is arranged in the detection main body (1), the extrusion mechanism (5) comprises a connecting rod (501), one end of the connecting rod (501) is connected with a trapezoid block (502), the trapezoid block (502) is elastically connected with the limiting plate (102) through a return spring (503), a lug (504) is arranged on one side of the trapezoid block (502), and an inclined plane (505) is formed in the surface of the lug (504);
the detection mechanism (7) is used for measuring cable resistance, the detection mechanism (7) comprises an inner shell (701) which is connected inside an outer shell (4) in a sliding mode and provided with a notch at one end, a first extrusion rod (702) is fixedly arranged on the outer surface of the inner shell (701), a sliding rod (703) is connected inside the inner shell (701) in a sliding mode, and a second extrusion rod (705) arranged inside the notch is fixedly arranged on the outer surface of the sliding rod (703).
2. The high-voltage cable insulation resistance detection device according to claim 1, wherein the stabilizing mechanism (2) comprises a first arc plate (201) which is fixedly installed on the upper surface of the detection main body (1) at equal intervals, the first arc plate (201) is slidably connected with a second arc plate (202) through a limiting column, the inner cambered surfaces of the first arc plate (201) and the second arc plate (202) are fixedly adhered with anti-wear pads (203), vertical rods (204) are symmetrically installed at the lower ends of the second arc plates (202), the lower ends of the vertical rods (204) penetrate through the first arc plate (201) and the detection main body (1) and are fixedly connected with transverse plates (205), and the vertical rods (204) are fixedly connected with the surface of the detection main body (1) through connecting springs (206) sleeved on the surfaces of the vertical rods.
3. The high-voltage cable insulation resistance detection device according to claim 2, wherein a disc (301) is sleeved outside the deflector rod (3), and a plurality of groups of protrusions (302) are fixedly arranged on the surface of the disc (301) at equal intervals.
4. A high voltage cable insulation resistance detection device according to claim 3, wherein a plurality of groups of through holes (401) are formed in the surface of the outer casing (4) at equal intervals, and a second chute (402) having the same shape as the first chute (101) is formed in the upper surface of the outer casing (4).
5. The high-voltage cable insulation resistance detection device according to claim 4, wherein the elastic contact piece (6) is in a Z-shaped structure, and a convex ring (601) is fixedly arranged on one side, close to the through hole (401), of the elastic contact piece (6).
6. The high-voltage cable insulation resistance detection device according to claim 5, wherein a strip-shaped groove is formed in the surface of the inner housing (701) in a penetrating manner, the strip-shaped groove is in sliding fit with the deflector rod (3), and the inner housing (701) is connected with the inner wall of the outer housing (4) through an elastic piece (8).
7. The high voltage cable insulation resistance detection device according to claim 6, wherein the ends of the first extrusion rod (702) and the second extrusion rod (705) are on the same horizontal line, and the ends are in press fit with the elastic contact piece (6).
8. The high-voltage cable insulation resistance detection device according to claim 7, wherein the upper surface of the sliding rod (703) is provided with an insertion hole (7031), and the sliding rod (703) is connected and fixed with the inner wall of the inner housing (701) through a circular spring (704).
9. The high-voltage cable insulation resistance detection device according to claim 8, wherein the elastic piece (8) comprises a strip-shaped plate (801) which is in sliding fit with a sliding groove formed in one side of the inner shell (701), and the strip-shaped plate (801) is fixedly connected with the inner wall of the outer shell (4) through symmetrically arranged compression springs (802).
10. A high-voltage cable insulation resistance detection method applied to the high-voltage cable insulation resistance detection device according to claim 9, characterized by comprising the steps of:
s1, firstly, pulling off an external insulating material of a high-voltage cable to be subjected to insulation resistance detection, and then sequentially arranging three inner wire cores and peeling the end parts to enable copper wires inside the wire cores to be exposed outside;
s2, respectively placing the three wire cores which are finished in arrangement on a first arc-shaped plate (201), and inserting copper wires exposed outside into detection holes formed in the surface of a detection main body (1);
s3, pushing a deflector rod (3) in a fixed state, driving an extrusion mechanism (5) to start to act through the action of an outer shell (4), enabling a transverse plate (205) to start to drive a second arc plate (202) to start to press down, clamping and fixing a wire core, simultaneously driving an inner shell (701) to start to act, driving a first extrusion rod (702) and a second extrusion rod (705) to start to extrude a first group and a second group of elastic contact pieces (6), enabling a convex ring (601) arranged on one side of the elastic contact pieces (6) to be in closer contact with copper wires, and starting to measure insulation resistance of the wire cores of the first group and the second group, so that accuracy of measurement results is ensured;
s4, after the measurement of the first wire core and the second wire core is completed, the deflector rod (3) is pulled upwards, so that the deflector rod (3) is separated from the jack (7031), the second extrusion rod (705) is separated from the second group of elastic contact pieces (6) under the action of the round spring (704), the third group of elastic contact pieces (6) are extruded, the insulation resistance of the first group of wire cores and the third group of wire cores is measured, after the measurement of the first group of wire cores and the third group of wire cores is completed, the deflector rod (3) is pulled to transversely move, the first extrusion rod (702) fixedly installed on the surface of the inner shell (701) is started to be separated from the first group of elastic contact pieces (6), and the second group of elastic contact pieces (6) are extruded, and the insulation resistance between the second group of wire cores and the third group of wire cores is measured.
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