CN114325050A - High-voltage cable sheath circulating current prediction system - Google Patents
High-voltage cable sheath circulating current prediction system Download PDFInfo
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- CN114325050A CN114325050A CN202111630862.9A CN202111630862A CN114325050A CN 114325050 A CN114325050 A CN 114325050A CN 202111630862 A CN202111630862 A CN 202111630862A CN 114325050 A CN114325050 A CN 114325050A
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Abstract
The invention relates to a high-voltage cable sheath circulating current prediction system, which comprises: a connection box and a prediction mechanism. The prediction mechanism is mounted to the connection frame. The prediction mechanism includes: the device comprises a conductive top bolt, an insulating box, a connecting guide rail, an electromagnet, a telescopic cylinder, an iron sheet, a pressure sensing switch and a GPS (global positioning system) positioner. The conductive top bolt is vertically connected to the connecting frame in a penetrating mode through threads. The insulating box is fixedly connected to the conductive top bolt. The connecting guide rails are connected into the insulating box, and the electromagnets are connected between the connecting guide rails in a sliding mode. The electromagnet is electrically connected with the conductive top bolt. The telescopic cylinder is provided with a plurality of telescopic cylinders, the telescopic cylinders are vertically connected into the insulating box, and the telescopic cylinders are sequentially connected in a sliding and penetrating manner from top to bottom. And each telescopic cylinder is horizontally and fixedly connected with an iron sheet. The invention has the advantages that the circulating current in the cable metal sheath can be conveniently fed back to the background signal before exceeding the withstand voltage tolerance value, the crisis can be predicted in advance, the maintenance treatment can be conveniently carried out in time, and the damage can be avoided.
Description
Technical Field
The invention relates to the technical field of high-voltage cable sheath circulation, in particular to a high-voltage cable sheath circulation prediction system.
Background
The metal sheath of the cable is typically grounded either single-ended or cross-connected and double-ended. Normally, the metal sheath has only a few tens of volts of induced circulating current voltage, but the cable is damaged by external force, grounding wire theft, biological damage, chemical corrosion and other reasons, the circulating current voltage of the sheath becomes a suspension voltage, and the voltage value is likely to rise above the withstand voltage tolerance value of the outer sheath of the cable. In this case, the sheath will be punctured or even burned. Although a circulating current monitoring device is generally installed on the cable metal sheath, a signal is generally fed back to a background only when the circulating current voltage exceeds an allowable value, and a crisis signal cannot be fed back in advance, so that the cable metal sheath cannot be prevented from being damaged due to circulating current in time.
Disclosure of Invention
The present invention is directed to a system for predicting sheath circulating current of high voltage cable, so as to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a high voltage sheath circulating current prediction system comprising: a connection box and a prediction mechanism. The prediction mechanism is mounted to the connection frame. The prediction mechanism includes: the device comprises a conductive top bolt, an insulating box, a connecting guide rail, an electromagnet, a telescopic cylinder, an iron sheet, a pressure sensing switch and a GPS (global positioning system) positioner. The conductive top bolt is vertically connected to the connecting frame in a penetrating mode through threads. The insulating box is fixedly connected to the conductive top bolt. The connecting guide rails are connected into the insulating box, and the electromagnets are connected between the connecting guide rails in a sliding mode. The electromagnet is electrically connected with the conductive top bolt. The telescopic cylinder is provided with a plurality of telescopic cylinders, the telescopic cylinders are vertically connected into the insulating box, and the telescopic cylinders are sequentially connected in a sliding and penetrating manner from top to bottom. Equal horizontal fixedly connected with iron sheet on every telescopic cylinder, pressure-sensitive switch installs to connecting in the guide rail, and the GPS locator is installed to insulating box on, and pressure-sensitive switch is connected with the GPS locator electricity.
As a further scheme of the invention: a high voltage sheath circulating current prediction system further comprising: and a fixing mechanism. The fixing mechanism includes: arc frame, connection bulge loop and fixing bolt. The arc frame is movably connected to the connecting frame. The connecting frame and the arc-shaped frame are fixedly connected with connecting convex rings. The fixing bolt is connected with the convex ring in a threaded fit manner.
As a further scheme of the invention: the arc-shaped frame and the connecting frame are insulators.
As a further scheme of the invention: the outer wall of the arc-shaped frame is provided with anti-skid grains.
As a further scheme of the invention: the prediction mechanism further comprises: and the convex handle is used for rotating the insulating box. The convex handle is fixedly connected to the insulating box.
As a further scheme of the invention: a high voltage sheath circulating current prediction system further comprising: a corrugated telescopic sheath. The corrugated telescopic sheath is sleeved on the conductive top bolt and penetrates through the connecting frame. One end of the corrugated telescopic sheath is connected to the insulating box, and the other end of the corrugated telescopic sheath is an opening end.
As a further scheme of the invention: the end department that is close to the insulating box of flexible sheath of ripple is connected with the sliding ring, and the sliding ring sets annular spout. The annular sliding groove is formed at the position of the insulating box, and the sliding ring is embedded in the annular sliding groove in a sliding mode.
As a further scheme of the invention: the inner wall of the annular chute is coated with a smoothing agent for reducing friction.
As a further scheme of the invention: a high voltage sheath circulating current prediction system further comprising: and a grounding mechanism. The grounding mechanism includes: receiver, earth connection, metal ball, driving motor, dog and sealed commentaries on classics board. Receiver fixed connection to insulating box. The metal ball is connected to the end of the grounding wire. The metal ball is in the containing box. The bottom of receiver is the opening. The closed rotating plate is horizontally arranged at the opening at the bottom of the storage box and is movably connected with the storage box. The driving motor is installed to receiver department, dog fixed connection to driving motor's main shaft end. The driving motor is electrically connected with the pressure induction switch.
As a further scheme of the invention: a high voltage sheath circulating current prediction system further comprising: and the conductive binding ring is used for binding and connecting the ground wire.
Compared with the prior art, the invention has the beneficial effects that: the method and the device have the advantages that the circulation current in the cable metal sheath can be conveniently fed back to the background signal before exceeding the withstand voltage tolerance value, crisis prediction is realized in advance, timely maintenance processing is convenient, and damage is avoided.
The electric power that exists in the conductive top bolt conduction cable metal sheath of main dependence gets into the circuit that the electro-magnet belongs to, then relies on electric power stronger, and the principle that the magnetic force of electro-magnet is big makes the electro-magnet rise gradually. And before the circulating current in the cable metal sheath exceeds an allowable value, the electromagnet moves to act on a switch device for triggering the GPS positioner, so that a signal is sent to a background, and background personnel can know the signal in advance conveniently.
Meanwhile, when the circulating current of the connecting wire at the bottom of the insulating box in the cable metal sheath is about to exceed an allowable value, the metal ball falls down to contact the ground, so that the grounding of the cable metal sheath is realized. The current on the cable metal sheath is led into the ground, so that the cable metal sheath is protected before background workers arrive at the site for overhauling conveniently.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a high voltage cable sheath circulating current prediction system according to the present invention.
Fig. 2 is an enlarged structural view at a in fig. 1.
Fig. 3 is a left side view of the distributed iron sheets in the high voltage cable sheath circulating current prediction system of fig. 1.
Fig. 4 is a left side view schematic diagram of the connection frame and the fixing mechanism in the high voltage cable sheath circulating current prediction system of fig. 1.
Fig. 5 is a schematic top view of the slip ring and the insulation box of the high voltage cable sheath circulating current prediction system of fig. 2.
List of reference numerals: a high voltage cable sheath circulating current prediction system 100; a connection frame 10; a prediction mechanism 20; a conductive plug 21; an insulating case 22; a connecting rail 23; an electromagnet 24; a telescopic cylinder 25; an iron piece 26; a pressure sensitive switch 27; a GPS locator 28; a background receiving terminal 281; a signal lamp 282; a lug 29; a fixing mechanism 30; an arc frame 31; a connecting convex ring 32; a fixing bolt 33; a corrugated expansion sheath 40; a slip ring 41; an annular chute 411; a grounding mechanism 50; a storage box 51; a ground line 52; the metal balls 53; a drive motor 54; a stopper 55; a closing flap 56; conductive strapping 57.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, in an embodiment of the present invention, a system 100 for predicting sheath circulating current includes: a connection box 10 and a prediction mechanism 20. The connection frame 10 is used to fixedly secure the cable metal sheath 200 to the outside. The prediction mechanism 20 is mounted to the bottom of the connection frame 10. The prediction means 20 includes: the device comprises a conductive top bolt 21, an insulating box 22, a connecting guide rail 23, an electromagnet 24, a telescopic cylinder 25, an iron sheet 26, a pressure sensing switch 27 and a GPS positioner 28. The conductive top bolt 21 is vertically connected to the bottom of the connecting frame 10 in a penetrating mode through threads, and the conductive top bolt 21 is made of conductive materials and is convenient to conduct electricity. The insulating case 22 is fixedly connected to the lower end of the conductive head pin 21. The connecting guide rails 23 are vertically and fixedly connected to two sides of the inner bottom of the insulating box 22 in a left-right paired mode, the electromagnets 24 are connected between the connecting guide rails 23 in a sliding mode, and the electromagnets 24 conveniently slide up and down along the connecting guide rails 23. The electrified conduction on the electromagnet 24 and the lower end of the conductive top bolt 21 are electrically connected on a closed loop circuit through a lead, namely when the conductive top bolt 21 is electrified, the electromagnet 24 is electrified to generate magnetic force, and the larger the current electrified by the conductive top bolt 21 is, the larger the current transmitted to the electromagnet 24 is. The telescopic tube 25 sets up a plurality ofly, and the vertical interior top that is connected to insulating box 22 of telescopic tube 25 simultaneously to telescopic tube 25 slides from last to inserting in proper order down and links together, and telescopic tube 25 that combines together promptly can carry out concertina movement in vertical direction. Equal horizontal fixedly connected with iron sheet 26 on the lower extreme outer wall of every telescopic cylinder 25, diminishes one by one from the width of the iron sheet 26 that distributes down, and pressure-sensitive switch 27 fixed mounting is to the upper end inside wall department of connecting guide rail 23, and on GPS locator 28 installed to insulating box 22, pressure-sensitive switch 27 was connected with GPS locator 28 electricity to GPS locator 28 set independent power source. Meanwhile, the GPS locator 28 is provided with a background receiving terminal 281, the background receiving terminal 281 is provided with a signal lamp 282, the background receiving terminal 281 is installed in a background of the control monitoring cable, when the GPS locator 28 starts to emit a position signal, the background receiving terminal 281 receives the signal, and the signal lamp 282 is started, so that a person in the background can be prompted as to where the cable body sheath 200 is abnormal in circulating voltage.
The connection frame 10 is sleeved on the cable metal sheath 200 with the insulation box 22 in the bottom position. Then the insulating box 22 rotates to drive the conductive top bolt 21, so that the conductive top bolt 21 rotates and rises upwards relative to the connecting frame 10, and finally the conductive top bolt 21 abuts against the cable metal sheath 200. If the circulating voltage and current in the cable metal sheath 200 at the current position are increased, a larger current is applied to the electromagnet 24 electrically connected to the conductive plug 21, and the generated magnetic force is larger. Then, the magnetic force generated between the electromagnet 24 and the iron piece 26 closest to the upper side is increased to be larger than the gravity applied to the electromagnet 24. The electromagnet 24 then slides up the connecting rail 23 to be lifted up and attracted to the iron piece 26 at the closest position. If the circulating current in the cable metal sheath 200 continuously increases, the magnetic force generated by the electromagnet 24 increases, and meanwhile, the widths of the iron sheets 26 distributed from top to bottom decrease one by one, that is, the iron sheets 26 on a certain layer are prevented from being completely shielded, so that the electromagnet 24 which conveniently increases the magnetic force continuously slides upwards along the connecting guide rail 23 to lift when being adsorbed on the iron sheet 26 at the lower position, and adsorbs another iron sheet 26 on the upper layer. If the circulation current in the cable metal sheath 200 is only changed for a short time and then returns to normal, the magnetic force of the electromagnet 24 is reduced, and then the electromagnet slides down to reset by means of gravity. When the circulation in the cable metal sheath 200 continuously increases, i.e. the circulation is about to exceed the withstand voltage tolerance of the cable metal sheath 200, the electromagnet 24 just slides up to the top of the connecting guide rail 23 to trigger the pressure sensing switch 27, so that the background receiving terminal 281 is enabled to receive signals by the pressure sensing switch 27, and the signal lamp 282 is enabled to be started at the same time, thereby conveniently prompting the circulation value in the cable body sheath 200 at what position the background personnel are about to exceed the tolerance, thereby realizing the function of predicting the circulation abnormality in advance and arranging the maintenance in time.
A high voltage sheath circulating current prediction system 100 further comprising: and a securing mechanism 30. The fixing mechanism 30 includes: an arc frame 31, a connecting convex ring 32 and a fixing bolt 33. The arc frame 31 is hinge-movably connected to the upper side of the rear end of the connection frame 10. The front end of the connecting frame 10 and the front end of the arc-shaped frame 31 are both fixedly connected with a connecting convex ring 32. The fixing bolt 33 is connected to the connection collar 32 by screw-fitting. When the connection frame 10 needs to be fixedly connected to the cable metal sheath 200, the connection frame 10 is located at the bottom of the cable metal sheath 200, and the arc-shaped frame 31 rotates to be located at the upper side of the cable metal sheath 200, at this time, the arc-shaped frame 31 and the connection convex ring 32 at the end of the connection frame 10 are aligned up and down, and then the fixing bolt 33 is penetrated between the connection convex rings 32, so that the arc-shaped frame 31 and the connection frame 10 are sleeved on the cable metal sheath 200.
The arc frame 31 and the connection frame 10 are insulators.
The outer wall of the arc-shaped frame 31 is provided with anti-slip lines, so that the arc-shaped frame 31 can be stably contacted with the outer wall of the cable metal sheath 200.
The prediction mechanism 20 further includes: for rotating the lug 29 of the insulating cartridge 22. The lug 29 is fixedly connected to the outer wall of the insulating box 22. When the conductive top bolt 21 needs to be rotated through the insulating box 22, the convex handle 29 is rotated to avoid electric shock.
A high voltage sheath circulating current prediction system 100 further comprising: a corrugated expansion sheath 40. The corrugated expansion sheath 40 is fitted over the conductive header 21, and the corrugated expansion sheath 40 passes through the connection frame 10. The corrugated expansion sheath 40 is connected to the insulating case 22 at one end and is open at the other end. The corrugated telescopic sheath 40 prevents external foreign matters from being attached to the conductive top bolt 21 and affecting normal conduction of the conductive top bolt, and meanwhile, the corrugated telescopic sheath 40 is telescopic and prevents the conductive top bolt 21 from being affected to move relative to the connecting frame 10.
The corrugated telescopic sheath 40 is connected with a slip ring 41 at the end close to the insulating box 22, and the slip ring 41 is provided with an annular sliding chute 411. The annular sliding groove 411 is arranged at the upper end face of the insulating box 22, the sliding ring 41 is embedded in the annular sliding groove 411 in a sliding mode, the sliding ring 41 and the annular sliding groove 411 are connected in a matched mode, the corrugated telescopic sheath 40 can rotate relative to the insulating box 22 conveniently, and the insulating box 22 is prevented from being hindered from rotating.
The inner wall of the annular chute 411 is coated with a friction-reducing smoothing agent.
A high voltage sheath circulating current prediction system 100 further comprising: a grounding mechanism 50. The grounding mechanism 50 includes: the device comprises a storage box 51, a grounding wire 52, a metal ball 53, a driving motor 54, a stop 55 and a sealing rotating plate 56. The storage case 51 is fixedly connected to the bottom of the insulation case 22. One end of the ground wire 52 is connected to the outer wall of the cable metal sheath 200, and the other end is inserted into the storage case 51. The metal ball 53 is connected to the ground wire 52 at the end inside the housing case 51. The metal balls 53 are in the storage case 51. The bottom of storage case 51 is open. Closed rotating plate 56 is horizontally arranged at the bottom opening of storage box 51, and the right end of closed rotating plate 56 is movably connected with storage box 51 through a hinge. A driving motor 54 is installed at the outside of the receiving case 51, a stopper 55 is fixedly connected to a spindle end of the driving motor 54, and the stopper 55 is positioned at the lower side of the closing rotating plate 56, and the driving motor 54 is electrically connected to the pressure sensing switch 27, when the circulation current in the cable metal sheath 200 is continuously increased, when the withstand voltage tolerance of the cable metal sheath 200 is exceeded, the electromagnet 24 just slides up to the top of the connecting rail 23, the pressure-sensitive switch 27 is triggered, the pressure-sensitive switch 27 causes the driving motor 54 to drive the stopper 55 to rotate, the stopper 55 is separated from the closed-off rotating plate 56, so that the metal ball 53 falls out from the bottom of the storage box 5, and the earth wire 52 is stretched and unfolded, and finally the metal ball 53 contacts the ground, so that the earth wire 52 is connected with the ground and the cable metal sheath 200, the current on the cable metal sheath 200 is led into the ground, so that the cable metal sheath 200 is protected before background workers arrive at the site for overhauling conveniently.
A high voltage sheath circulating current prediction system 100 further comprising: and a conductive binding ring 57 for binding and connecting the ground wire 52. The conductive binding ring 57 is used to be fixedly connected to the outer wall of the cable metal sheath 200, so as to facilitate the connection of the end of the grounding wire 52 to the cable metal sheath 200.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A high voltage cable sheath circulating current prediction system, comprising: a connection frame and a prediction mechanism; the predictive mechanism is mounted to the junction box; the prediction mechanism includes: the device comprises a conductive top bolt, an insulating box, a connecting guide rail, an electromagnet, a telescopic cylinder, an iron sheet, a pressure sensing switch and a GPS (global positioning system) positioner; the conductive top bolt is vertically penetrated to the connecting frame through threads; the insulating box is fixedly connected to the conductive top bolt; the connecting guide rails are connected into the insulating box, and the electromagnets are connected between the connecting guide rails in a sliding manner; the electromagnet is electrically connected with the conductive top bolt; the number of the telescopic cylinders is multiple, the telescopic cylinders are vertically connected into the insulating box, and the telescopic cylinders are sequentially connected in a sliding and penetrating manner from top to bottom; every equal horizontal fixedly connected with on the telescopic cylinder the iron sheet, pressure-sensitive switch install extremely in the connecting guide rail, the GPS locator install extremely on the insulating box, pressure-sensitive switch with the GPS locator electricity is connected.
2. The system of claim 1, wherein the system further comprises a controller for controlling the power converter,
the high voltage sheath circulating current prediction system further comprises: a fixing mechanism; the fixing mechanism includes: the connecting convex ring is connected with the arc frame; the arc-shaped frame is movably connected to the connecting frame; the connecting convex ring is fixedly connected with the connecting frame and the arc-shaped frame; the fixing bolt is connected with the connecting convex ring in a threaded fit mode.
3. The system of claim 2, wherein the system further comprises a controller for controlling the power converter,
the arc-shaped frame and the connecting frame are both insulators.
4. The system of claim 2, wherein the system further comprises a controller for controlling the power converter,
and anti-skid grains are arranged on the outer wall of the arc-shaped frame.
5. The system of claim 1, wherein the system further comprises a controller for controlling the power converter,
the prediction mechanism further comprises: a lug for rotating the insulating cartridge; the convex handle is fixedly connected to the insulating box.
6. The system of claim 1, wherein the system further comprises a controller for controlling the power converter,
the high voltage sheath circulating current prediction system further comprises: a corrugated telescopic sheath; the corrugated telescopic sheath is sleeved on the conductive top bolt and penetrates through the connecting frame; one end of the corrugated telescopic sheath is connected to the insulating box, and the other end of the corrugated telescopic sheath is an opening end.
7. The system of claim 6, wherein the system further comprises a controller for controlling the power converter,
the end, close to the insulating box, of the corrugated telescopic sheath is connected with a slip ring, and the slip ring is provided with an annular sliding groove; the annular sliding groove is formed at the position of the insulating box, and the sliding ring is embedded in the annular sliding groove in a sliding mode.
8. The system of claim 7, wherein the system further comprises a controller for controlling the power converter,
and a smoothing agent for reducing friction is coated on the inner wall of the annular sliding chute.
9. The system of claim 1, wherein the system further comprises a controller for controlling the power converter,
the high voltage sheath circulating current prediction system further comprises: a grounding mechanism; the grounding mechanism includes: the device comprises a storage box, a grounding wire, a metal ball, a driving motor, a stop block and a sealing rotating plate; the storage box is fixedly connected to the insulating box; the metal ball is connected to the end of the grounding wire; the metal ball is positioned in the containing box; the bottom of the storage box is provided with an opening; the closed rotating plate is horizontally arranged at an opening at the bottom of the storage box and is movably connected with the storage box; the driving motor is installed at the storage box, and the stop block is fixedly connected to a spindle end of the driving motor; the driving motor is electrically connected with the pressure induction switch.
10. The system of claim 9, wherein the system further comprises a controller for controlling the power converter,
the high voltage sheath circulating current prediction system further comprises: and the conductive binding ring is used for binding and connecting the grounding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111630862.9A CN114325050A (en) | 2021-12-28 | 2021-12-28 | High-voltage cable sheath circulating current prediction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111630862.9A CN114325050A (en) | 2021-12-28 | 2021-12-28 | High-voltage cable sheath circulating current prediction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114325050A true CN114325050A (en) | 2022-04-12 |
Family
ID=81014920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111630862.9A Withdrawn CN114325050A (en) | 2021-12-28 | 2021-12-28 | High-voltage cable sheath circulating current prediction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114325050A (en) |
-
2021
- 2021-12-28 CN CN202111630862.9A patent/CN114325050A/en not_active Withdrawn
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Application publication date: 20220412 |
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