CN112421546A - Switchable electric wire maintenance device for preventing freezing pressure loss in winter - Google Patents
Switchable electric wire maintenance device for preventing freezing pressure loss in winter Download PDFInfo
- Publication number
- CN112421546A CN112421546A CN202011385837.4A CN202011385837A CN112421546A CN 112421546 A CN112421546 A CN 112421546A CN 202011385837 A CN202011385837 A CN 202011385837A CN 112421546 A CN112421546 A CN 112421546A
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- fixedly connected
- cavity
- lifting
- sleeve
- rotating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention discloses a switchable electric wire maintenance device for preventing winter freezing pressure loss, which comprises a connecting sleeve, wherein a rotating connecting shaft is rotationally connected in the connecting sleeve, the rotating connecting shaft is symmetrically and fixedly connected with two connecting plates in the front and back direction, the connecting plates are fixedly connected with a climbing half ring, the outer wall of the right side of the climbing half ring is rotationally connected with a rotating piece, the connecting rods are fixedly connected with a supporting plate, the upper end surface of the supporting plate is fixedly connected with a switching lifting rod, and the tail end of the switching lifting rod is fixedly connected with an iron block; the switchable electric wire maintenance device capable of preventing the pressure loss of the frozen electric wires in winter is provided with the rotary switching device, the movable deicing device can be switched to different electric wires through angle adjustment to perform deicing maintenance, the maintenance work efficiency of a plurality of electric wires is further greatly improved, and meanwhile, the movable deicing device removes the frozen electric wires through the preposed intermittent deicing mechanism in the moving process.
Description
Technical Field
The invention relates to a switchable electric wire maintenance device for preventing freezing pressure loss in winter, and mainly relates to the related technical field of cable equipment.
Background
The electric wire is an important power transmission device, is very important to the maintenance work of electric wire, especially in chilly winter, and the temperature and humidity difference is great in the morning and evening, leads to the electric wire to freeze very easily, and some areas are in the position that the snow falls more in addition for the electric wire freezes snow very easily, and then leads to the electric wire condition that the wire rod pressed down to break even appears in ageing fast. The present invention improves upon the above-mentioned disadvantages.
Disclosure of Invention
The invention aims to provide a switchable electric wire maintenance device for preventing pressure loss caused by freezing in winter, and the switchable electric wire maintenance device overcomes the problems.
The invention is realized by the following technical scheme.
The invention relates to a switchable electric wire maintenance device for preventing pressure loss caused by freezing in winter, which comprises a connecting sleeve, wherein a rotating connecting shaft is rotationally connected in the connecting sleeve, two connecting plates are symmetrically and fixedly connected in front and back of the rotating connecting shaft, a climbing semi-ring is fixedly connected to the connecting plates, a rotating member is rotationally connected to the outer wall of the right side of the climbing semi-ring, a supporting plate is fixedly connected to the connecting rods, a switching lifting rod is fixedly connected to the upper end surface of the supporting plate, an iron block is fixedly connected to the tail end of the switching lifting rod, an icing removing device is fixedly connected to the iron block, the icing removing device comprises a rotating cylinder, two rotating mounting shafts are rotationally connected in the rotating cylinder, a deicing sleeve is fixedly connected to the rotating mounting shafts, an air injection cavity is arranged in the deicing sleeve, thermal nozzles are arranged, the deicing sleeve is internally provided with a suction cavity, the suction cavity is internally provided with absorption nozzles in an annular array, the absorption nozzles are used for absorbing water, the right end face of the deicing sleeve is fixedly connected with a scraping sleeve, the scraping sleeve is internally fixedly connected with a scraping toothed plate, the scraping toothed plate is used for scraping crushed ice, the scraping sleeve is fixedly connected with a fixed plate, the fixed plate is fixedly connected with a reciprocating box, the reciprocating box is internally provided with a reciprocating cavity, the reciprocating cavity is internally and slidably connected with a sliding ring plate, the left side of the sliding ring plate is fixedly connected with a return spring, the right side of the sliding ring plate is fixedly connected with a deicing ring shovel, the deicing ring shovel is used for removing front ice, the inner wall of the reciprocating cavity is fixedly connected with a reciprocating motor, the reciprocating motor is in power connection with a reciprocating cam, the reciprocating cam is used for intermittently pushing the sliding ring plate to realize reciprocating motion, and the, the climbing cavity inner wall annular array is provided with a wheel cavity, the wheel cavity is internally symmetrically and fixedly connected with a mounting frame, the mounting frame is rotatably connected with a rotating shaft, the rotating shaft is fixedly connected with a rotating wheel, the rotating wheel is fixedly connected with an engaging helical gear, the engaging helical gear is fixedly connected with a fixed belt pulley, the upper fixed belt pulley and the lower fixed belt pulley are directly and rotatably connected with a transmission belt, the engaging helical gear at the upper side is engaged and connected with a second-stage helical gear, the upper end surface of the second-stage helical gear is fixedly connected with a transmission shaft, the transmission shaft is fixedly connected with a transmission chain, the transmission chain is rotatably connected with a transmission chain, the upper side of the climbing semi-ring is provided with a power cavity, the power cavity is fixedly connected with a power motor, the power, and the lower end face of the matched helical gear is fixedly connected to the upper end face of the transmission chain wheel.
Further, be equipped with the lift groove in the rotation piece, the semi-ring right side inner wall fixedly connected with installation axle that climbs, installation axle end is arranged in the lift inslot, installation axle fixedly connected with cooperation gear, the rotation top outer wall fixedly connected with lifting box, fixedly connected with lifting electromagnet in the lifting box, sliding connection has a lifting rack in the lifting box, lifting rack is used for driving cooperation gear rotates, and then realizes turning to switching work electric wire.
Further, a rotary cylinder downside fixedly connected with goes up and down to laminate the case, go up and down laminating case left side fixedly connected with adsorption electromagnet, go up and down to laminate the incasement and be equipped with the lift chamber, lift intracavity fixedly connected with transmission electromagnet, lift intracavity sliding connection has the lift connecting rod, the symmetry is rotated around the lift connecting rod end is connected with the connecting rod, the connecting rod end is rotated and is connected with the keysets, keysets fixed connection is in the outer wall of the remove device that freezes.
Further, cover is cleaned to deicing sleeve left side fixedly connected with, clean the cover fixedly connected with clean the pad, clean the pad and be used for the wire rod to wipe futilely, clean two power boards of cover outer wall longitudinal symmetry fixedly connected with, be equipped with the scope chamber in the power board, scope intracavity sliding connection has the link, link fixed connection has power wheelset, power wheelset is used for providing power.
Furthermore, a water tank is fixedly connected to the lower side of the climbing semi-ring, a suction return pump is fixedly connected in the water tank and communicated with a suction return pipe, the tail end of the suction return pipe is communicated with the suction return cavity, a treatment box is fixedly connected to the right side of the water tank, a heater is fixedly connected in the treatment box and used for heating and pressurizing to generate hot steam, a transmission pipe is communicated with the treatment box, the tail end of the transmission pipe is communicated with the air injection cavity, a communication valve is directly connected between the water tank and the treatment box and used for controlling and communicating the two cavities.
Further, the left side of the climbing half ring is fixedly connected with a fitting fixing plate, and the fitting fixing plate is used for fixing and combining the two climbing half rings so as to move up and down around the telegraph pole.
The invention has the beneficial effects that: the switchable electric wire maintenance device capable of preventing the pressure loss of the frozen wires in winter is provided with the rotary switching device, the movable deicing device can be switched to different electric wires through angle adjustment to perform deicing maintenance, and further the maintenance work efficiency of a plurality of electric wires is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the 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, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the ice removing device of FIG. 1;
FIG. 3 is an enlarged schematic view of A in FIG. 1;
fig. 4 is an enlarged structural diagram of B in fig. 2.
Detailed Description
The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The switchable electric wire maintenance device for preventing pressure loss due to freezing in winter, which is described in conjunction with fig. 1-4, includes a connecting sleeve 12, a rotating connecting shaft 13 is rotatably connected in the connecting sleeve 12, two connecting plates 14 are symmetrically and fixedly connected to the front and the rear of the rotating connecting shaft 13, a climbing half ring 11 is fixedly connected to the connecting plates 14, a rotating member 36 is rotatably connected to the outer wall of the right side of the climbing half ring 11, a supporting plate 40 is fixedly connected to the connecting rods 46, a switching lifting rod 41 is fixedly connected to the upper end surface of the supporting plate 40, an iron block 43 is fixedly connected to the end of the switching lifting rod 41, an ice removing device 44 is fixedly connected to the iron block 43, the ice removing device 44 includes a rotating cylinder 61, two rotating mounting shafts 62 are rotatably connected to the rotating cylinder 61, an ice removing sleeve 47 is fixedly connected to the rotating, the inner wall annular array of the air spraying cavity 48 is provided with hot nozzles 49, the hot nozzles 49 are used for hot air spraying to perform deicing operation, an absorption cavity 57 is arranged in the deicing sleeve 47, an absorption nozzle 58 is arranged in the absorption cavity 57, the absorption nozzle 58 is used for absorbing moisture, the end surface of the right side of the deicing sleeve 47 is fixedly connected with a scraping sleeve 63, a scraping toothed plate 64 is fixedly connected in the scraping sleeve 63, the scraping toothed plate 64 is used for scraping crushed ice, the scraping sleeve 63 is fixedly connected with a fixing plate 65, the fixing plate 65 is fixedly connected with a reciprocating box 66, a reciprocating cavity 68 is arranged in the reciprocating box 66, a sliding ring plate 71 is slidably connected in the reciprocating cavity 68, the left side of the sliding ring plate 71 is fixedly connected with a return spring 70, the right side of the sliding ring plate 71 is fixedly connected with an deicing ring shovel 72, and the deicing ring shovel 72 is used for removing front ice, the inner wall of the reciprocating cavity 68 is fixedly connected with a reciprocating motor 67, the reciprocating motor 67 is in power connection with a reciprocating cam 69, the reciprocating cam 69 is used for intermittently pushing a sliding ring plate 71 to realize reciprocating motion, a climbing cavity 15 is arranged in the climbing half ring 11, a wheel cavity 24 is arranged in an annular array on the inner wall of the climbing cavity 15, an installation frame 28 is symmetrically and fixedly connected in the wheel cavity 24, the installation frame 28 is rotatably connected with a rotating shaft 29, the rotating shaft 29 is fixedly connected with a rotating wheel 30, the rotating wheel 30 is fixedly connected with an engaging helical gear 26, the engaging helical gear 26 is fixedly connected with a fixed belt wheel 27, the upper and lower fixed belt wheels 27 are directly and rotatably connected with a transmission belt 31, the engaging helical gear 26 on the upper side is engaged with a second-level helical gear 25, the upper end face of the second-level helical gear, the climbing device is characterized in that a transmission chain 22 is rotatably connected to the transmission chain wheel 21, a power cavity 16 is formed in the upper side of the climbing half ring 11, a power motor 17 is fixedly connected to the power cavity 16, a power shaft 18 is dynamically connected to the power motor 17, a matched helical gear 20 is rotatably connected to the inner wall of the top of the power cavity 16, the matched helical gear 20 is meshed with the transmission helical gear 19, and the lower end face of the matched helical gear 20 is fixedly connected to the upper end face of the transmission chain wheel 21.
Beneficially, a lifting groove 37 is formed in the rotating member 36, an installation shaft 38 is fixedly connected to the inner wall of the right side of the climbing half ring 11, the end of the installation shaft 38 is disposed in the lifting groove 37, a matching gear 39 is fixedly connected to the installation shaft 38, a lifting box 33 is fixedly connected to the outer wall of the top of the rotating member 36, a lifting electromagnet 34 is fixedly connected to the inside of the lifting box 33, a lifting rack 35 is slidably connected to the inside of the lifting box 33, and the lifting rack 35 is used for driving the matching gear 39 to rotate, so as to realize steering switching of working wires.
Beneficially, a lifting fitting box 73 is fixedly connected to the lower side of the rotating cylinder 61, an adsorption electromagnet 77 is fixedly connected to the left side of the lifting fitting box 73, a lifting cavity 74 is arranged in the lifting fitting box 73, a transmission electromagnet 76 is fixedly connected to the inside of the lifting cavity 74, a lifting connecting rod 75 is slidably connected to the inside of the lifting cavity 74, connecting rods 46 are rotatably connected to the front and back ends of the lifting connecting rod 75 in a front-back symmetrical mode, an adapter plate 45 is rotatably connected to the tail end of each connecting rod 46, and the adapter plate 45 is fixedly connected to the outer wall of the freezing removing device 44.
Beneficially, a wiping sleeve 51 is fixedly connected to the left side of the deicing sleeve 47, a wiping pad 52 is fixedly connected to the inside of the wiping sleeve 51, the wiping pad 52 is used for wiping wires, two power plates 53 are fixedly connected to the outer wall of the wiping sleeve 51 in an up-down symmetrical manner, a range cavity 54 is arranged in each power plate 53, a connecting frame 55 is slidably connected to the corresponding range cavity 54, a power wheel set 56 is fixedly connected to the corresponding connecting frame 55, and the power wheel set 56 is used for providing power.
Advantageously, a water tank 78 is fixedly connected to the lower side of the climbing half ring 11, a suction-back pump 79 is fixedly connected in the water tank 78, the suction-back pump 79 is communicated with a suction-back pipe 80, the tail end of the suction-back pipe 80 is communicated with the suction-back cavity 57, a treatment tank 82 is fixedly connected to the right side of the water tank 78, a heater 83 is fixedly connected in the treatment tank 82, the heater 83 is used for heating and pressurizing to generate hot steam, the treatment tank 82 is communicated with a transmission pipe 84, the tail end of the transmission pipe 84 is communicated with the air injection cavity 48, a communication valve 81 is directly connected between the water tank 78 and the treatment tank 82, and the communication valve 81 is used for controlling and communicating the two cavities.
Advantageously, an attaching and fixing plate 32 is fixedly connected to the left side of the climbing half ring 11, and the attaching and fixing plate 32 is used for fixedly combining the two climbing half rings 11 so as to move up and down around the utility pole.
Sequence of mechanical actions of the whole device:
1. during working and installation, the two climbing half rings 11 are closed to enable the attaching fixing plates 32 to be attached, installation and fixing are carried out, then the power motor 17 is started to drive the transmission helical gear 19 to rotate, further drive the matching helical gear 20 to rotate, so that the rotating wheel 30 rotates, further the lower rotating wheel 30 rotates through linkage of the transmission belt 31, and further the function of climbing upwards along the telegraph pole is realized;
2. when climbing to a proper height, the lifting rod 41 is switched to adjust the height, the lifting electromagnet 34 is controlled to control the lifting rack 35 to ascend and descend so as to control the angle of the lifting rod 41 to switch and select the electric wire to be operated, the transmission electromagnet 76 is electrified to drive the lifting connecting rod 75 to be recovered so as to enable the connecting rod 46 to ascend, the two deicing sleeves 47 are attached and fixed to clamp the electric wire in the electric wire cavity 50, the adsorption electromagnet 77 is powered off so as to enable the ice removing device 44 to be separated and fixed, the power wheel set 56 is started to drive the ice removing device 44 to operate along the electric wire, the reciprocating motor 67 is started to drive the reciprocating cam 69 to rotate, the sliding ring plate 71 is intermittently pushed to realize reciprocating motion, the ice removing ring shovel 72 is enabled to carry out the front ice removing operation, meanwhile, the communication valve 81 is communicated to release a part of water to enter the processing box, the heater 83 is used for boosting and heating to form heat steam, the heat steam is conveyed into the air injection cavity 48 through the conveying pipe 84 and is sprayed out through the hot nozzle 49 to remove residual ice on the surface of the wire, the suction-back pump 79 is started, water on the surface of the wire after ice removal is sucked back into the water tank 78 through the suction-back pipe 80 through the suction nozzle 58, the purpose of saving resources is further achieved, finally, in the moving process of the wiping pad 52, the treated wire part is wiped and water is sucked dry, and the problem that the treated wire is fast frozen is solved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a switchable electric wire maintenance device of pressure loss freezes in winter prevents, includes connecting sleeve, its characterized in that: the ice melting device comprises a connecting sleeve, a rotating connecting shaft is rotationally connected in the connecting sleeve, two connecting plates are symmetrically and fixedly connected with the front and the back of the rotating connecting shaft, a climbing half ring is fixedly connected with the connecting plates, a rotating member is rotationally connected with the outer wall of the right side of the climbing half ring, a supporting plate is fixedly connected with the connecting rods, a switching lifting rod is fixedly connected with the upper end surface of the supporting plate, an iron block is fixedly connected with the tail end of the switching lifting rod, an ice removing device is fixedly connected with the iron block, the ice removing device comprises a rotating cylinder, two rotating mounting shafts are rotationally connected in the rotating cylinder, a deicing sleeve is fixedly connected with the rotating mounting shafts, an air injection cavity is arranged in the deicing sleeve, a thermal nozzle is arranged on the annular array of the inner wall of the air injection cavity, the absorption nozzle is used for absorbing water back, the right end face of the deicing sleeve is fixedly connected with a scraping sleeve, a scraping toothed plate is fixedly connected in the scraping sleeve and used for scraping crushed ice, the scraping sleeve is fixedly connected with a fixing plate, the fixing plate is fixedly connected with a reciprocating box, a reciprocating cavity is arranged in the reciprocating box, a sliding ring plate is slidably connected in the reciprocating cavity, the left side of the sliding ring plate is fixedly connected with a return spring, the right side of the sliding ring plate is fixedly connected with a deicing ring shovel, the deicing ring shovel is used for removing frozen ice ahead, the inner wall of the reciprocating cavity is fixedly connected with a reciprocating motor, the reciprocating motor is in power connection with a reciprocating cam, the reciprocating cam is used for intermittently pushing the sliding ring plate to realize reciprocating motion, a climbing cavity is arranged in the climbing half ring, a wheel cavity is arranged in an annular array on the inner wall of the climbing cavity, and a mounting rack is, the mounting rack is rotationally connected with a rotating shaft, the rotating shaft is fixedly connected with a rotating wheel, the rotating wheel is fixedly connected with an engaged helical gear, the engaging helical gear is fixedly connected with a fixed belt wheel, the upper fixed belt wheel and the lower fixed belt wheel are directly and rotatably connected with a transmission belt, the engaging helical gear at the upper side is engaged and connected with a secondary helical gear, the upper end surface of the secondary bevel gear is fixedly connected with a transmission shaft, the transmission shaft is fixedly connected with a transmission chain wheel, the transmission chain wheel is rotationally connected with a transmission chain, the upper side of the climbing semi-ring is provided with a power cavity, the power cavity is fixedly connected with a power motor, the power motor is in power connection with a power shaft, the inner wall of the top of the power cavity is in rotating connection with a matched helical gear, the matched helical gear is meshed with the transmission helical gear, and the lower end face of the matched helical gear is fixedly connected with the upper end face of the transmission chain wheel.
2. The switchable electrical wire maintenance device for preventing pressure loss due to ice in winter according to claim 1, wherein: the electric wire lifting mechanism is characterized in that a lifting groove is formed in the rotating piece, an installation shaft is fixedly connected to the inner wall of the right side of the climbing semi-ring, the tail end of the installation shaft is arranged in the lifting groove, a matching gear is fixedly connected to the installation shaft, a lifting box is fixedly connected to the outer wall of the top of the rotating piece, a lifting electromagnet is fixedly connected to the inner side of the lifting box, a lifting rack is slidably connected to the lifting box, and the lifting rack is used for driving the matching gear to rotate so as to.
3. The switchable electrical wire maintenance device for preventing pressure loss due to ice in winter according to claim 1, wherein: the rotary drum is characterized in that a lifting laminating box is fixedly connected to the lower side of the rotary drum, an adsorption electromagnet is fixedly connected to the left side of the lifting laminating box, a lifting cavity is arranged in the lifting laminating box, a transmission electromagnet is fixedly connected to the lifting cavity, a lifting connecting rod is slidably connected to the lifting cavity, the front end and the rear end of the lifting connecting rod are symmetrically and rotatably connected to the connecting rod, a transfer plate is rotatably connected to the tail end of the connecting rod, and the transfer plate is fixedly connected to the outer wall of the freezing.
4. The switchable electrical wire maintenance device for preventing pressure loss due to ice in winter according to claim 1, wherein: the deicing sleeve is characterized in that a wiping sleeve is fixedly connected to the left side of the deicing sleeve, a wiping pad is fixedly connected to the inside of the wiping sleeve and used for wiping wires, two power plates are fixedly connected to the outer wall of the wiping sleeve in an up-and-down symmetrical mode, a range cavity is formed in each power plate, a connecting frame is connected to the inside of the range cavity in a sliding mode, a power wheel group is fixedly connected to the connecting frame, and the power wheel group is used for providing power.
5. The switchable electrical wire maintenance device for preventing pressure loss due to ice in winter according to claim 1, wherein: the device comprises a climbing semi-ring, a water tank, a suction and return pump, a suction and return pipe, a suction and return cavity, a processing box, a heater, a transmission pipe, a communicating valve and a control valve, wherein the water tank is fixedly connected to the lower side of the climbing semi-ring, the suction and return pump is fixedly connected in the water tank, the suction and return pipe is communicated with the suction and return cavity, the tail end of the suction and return pipe is communicated with the suction and return cavity, the right side of the water tank is fixedly connected with the processing box, the heater is fixedly connected in the processing box and is used for heating and pressurizing to generate hot steam, the processing box is.
6. The switchable electrical wire maintenance device for preventing pressure loss due to ice in winter according to claim 1, wherein: the climbing half ring left side fixedly connected with laminating fixed plate, the laminating fixed plate is used for fixedly combining two the climbing half ring, and then realize reciprocating around the wire pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385837.4A CN112421546A (en) | 2020-12-02 | 2020-12-02 | Switchable electric wire maintenance device for preventing freezing pressure loss in winter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385837.4A CN112421546A (en) | 2020-12-02 | 2020-12-02 | Switchable electric wire maintenance device for preventing freezing pressure loss in winter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112421546A true CN112421546A (en) | 2021-02-26 |
Family
ID=74829495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011385837.4A Withdrawn CN112421546A (en) | 2020-12-02 | 2020-12-02 | Switchable electric wire maintenance device for preventing freezing pressure loss in winter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112421546A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114899780A (en) * | 2022-06-21 | 2022-08-12 | 盛隆电气集团武汉有限公司 | Medium-voltage cable |
-
2020
- 2020-12-02 CN CN202011385837.4A patent/CN112421546A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114899780A (en) * | 2022-06-21 | 2022-08-12 | 盛隆电气集团武汉有限公司 | Medium-voltage cable |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |
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| WW01 | Invention patent application withdrawn after publication |