CN108922378B - 10kV overhead line phase sequence board convenient to distinguish at night - Google Patents
10kV overhead line phase sequence board convenient to distinguish at night Download PDFInfo
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- CN108922378B CN108922378B CN201810726705.XA CN201810726705A CN108922378B CN 108922378 B CN108922378 B CN 108922378B CN 201810726705 A CN201810726705 A CN 201810726705A CN 108922378 B CN108922378 B CN 108922378B
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- phase sequence
- insulating rod
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- card
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
- G09F7/02—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols
- G09F7/08—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols the elements being secured or adapted to be secured by means of grooves, rails, or slits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
- G09F7/18—Means for attaching signs, plates, panels, or boards to a supporting structure
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses a 10kV overhead line phase sequence plate convenient for distinguishing at night, which comprises a phase sequence plate, a cross arm, a first insulating rod and a second insulating rod, wherein the upper end of the phase sequence plate is provided with a cap peak, the upper end of the cap peak is provided with a mounting block, the middle part of the upper end of the mounting block is provided with a mounting groove, the first locking groove and the second locking groove horizontally cross through the locking rod, the outer wall of the cross arm is provided with a mounting through hole corresponding to the locking rod, the outer wall thread of the locking rod is sheathed with an annular clamping block, one side of the outer wall of the annular clamping block is connected with a bevel gear in a meshed manner, the lower end of the bevel gear is connected with a rotary rod, the rotary rod penetrates through the outer wall of the cap peak and extends downwards, the lower end of the phase sequence plate is provided with a supporting groove for the second insulating rod to be inserted, and the outer wall of the phase sequence plate is provided with an identifiable mark; the invention has simple structure, easy operation, electrified operation, convenient night inspection or rush repair, convenient and ingenious installation and suitability for wide popularization.
Description
Technical Field
The invention relates to the technical field of phase sequence cards, in particular to a 10kV overhead line phase sequence card convenient for distinguishing at night.
Background
The phase sequence cards are respectively sprayed with A phase, B phase, C phase and N phase (neutral line) marks by yellow, green, red and blue colors at present, and are fixed on A phase, B phase, C phase and N phase (neutral line) hardware fittings by fasteners on a pole tower, so that operators can clearly separate the phase sequence of each wire, misoperation is prevented, and casualties, line equipment and user motor electric appliances are avoided. The purposes of safe electricity utilization and safe electricity utilization are achieved. When the phase sequence card is used and installed, the power is firstly required to be cut off, then an operator climbs up a telegraph pole to fix the electric power phase sequence card on an iron accessory on the telegraph pole, and the electric power phase sequence card is used for distinguishing a three-phase power sequence number from a neutral line. And the existing phase sequence cards have poor light reflection performance, so that the indication effect of workers operating at night is poor, and the fault phase is difficult to determine.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a 10kV overhead line phase sequence board convenient for distinguishing at night.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a 10kV overhead line phase sequence plate convenient for distinguishing at night, which comprises a phase sequence plate, a cross arm, a first insulating rod and a second insulating rod, wherein the upper end of the phase sequence plate is provided with a cap peak, the upper end of the cap peak is provided with a mounting block, the middle part of the upper end of the mounting block is provided with a mounting groove, the middle part of the bottom wall of the mounting groove is provided with an adsorption magnet, one side of the inner wall of the mounting groove is provided with a first locking groove, the other side of the inner wall of the mounting groove is provided with a second locking groove, locking rods horizontally transversely penetrate through the first locking groove and the second locking groove, the outer wall of the cross arm is provided with a mounting through hole corresponding to the locking rods, the outer wall of the locking rods is sheathed with an annular clamping block in a threaded manner, one side of the outer wall of the annular clamping block is connected with a bevel gear in a meshed manner, the lower end of the bevel gear is connected with a rotary rod, the rotary rod penetrates through the outer wall of the cap peak to extend downwards, the upper end of the first insulating rod is provided with a clamping groove for inserting an extension end, the phase sequence plate is provided with a supporting groove for inserting the second insulating rod, the outer wall of the phase sequence plate is provided with an identifiable label.
Further, a positioning magnet is arranged at the lower end of the cross arm and below the mounting through hole.
Further, an annular limiting groove corresponding to the annular clamping block is formed in the mounting block.
Further, a soft cushion is arranged in the annular limiting groove.
Further, the material of sign is highly reflective material.
Further, the color of the phase sequence cards is any one of red phase sequence cards, yellow phase sequence cards, green phase sequence cards or blue phase sequence cards.
Further, the marks on the phase sequence cards are hollowed-out shapes.
Further, the mark is hollowed-out to form a A, B, C, N hollow pattern.
Further, the materials of the first insulating rod and the second insulating rod are any one of rubber, plastic and plastic.
Further, the cap peak is fixedly connected with the phase sequence plate.
Compared with the prior art, the invention has the beneficial effects that: insert the supporting tank with the second insulating rod in, lift the cross arm below with the phase sequence tablet through the second insulating rod, adsorb to location magnet through attracting magnet, the position of fixing the through-hole can be easily fixed a position, first insulating rod drives the rotary rod and rotates, make the bevel gear drive annular fixture block and rotate, thereby make the locking lever rotate and remove and insert first locking inslot after running through the fixing through-hole, thereby lock installation piece and cross arm together through the locking lever easily, the cap peak plays the guard action to the phase sequence tablet, the damage of rainwater to the phase sequence tablet has been reduced, the material of sign is highly reflective material, the staff of being convenient for is patrolled at night, the inconvenient observation that causes because the mounted position is too high, light is darker has been avoided. The invention has simple structure, easy operation, electrified operation, convenient night inspection or rush repair, convenient and ingenious installation and suitability for wide popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a 10kV overhead line phase sequence board which is convenient for distinguishing at night and provided by the embodiment of the invention;
fig. 2 is a top view of a first insulating rod of a 10kV overhead line phase sequence board, which is convenient for distinguishing at night, according to an embodiment of the present invention.
Icon: 1-a phase sequence card; 2-a cap peak; 3-mounting blocks; 4-mounting grooves; 5-cross arms; 6-mounting through holes; 7-a first locking groove; 8-a second locking groove; 9-locking bar; 10-an annular clamping block; 11-bevel gears; 12-rotating the rod; 13-clamping grooves; 14-a first insulating rod; 15-a second insulating rod; 16-a supporting groove; 17-identification; 18-attracting magnet; 19-positioning magnets.
Detailed Description
Hereinafter, various embodiments of the present invention will be described more fully. The invention is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the various embodiments of the invention to the specific embodiments disclosed herein, but rather the invention is to be understood to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the invention.
Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present invention indicate the presence of the disclosed functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the invention, the terms "comprises," "comprising," and their cognate terms are intended to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, e.g., may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", etc.) used in the various embodiments of the invention may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: in the present invention, unless explicitly specified and defined otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between the interiors of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, it should be understood by those of ordinary skill in the art that the terms indicating an orientation or a positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of description, not to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the invention belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the invention.
Fig. 1 is a schematic structural diagram of a 10kV overhead line phase sequence board provided in the present embodiment and convenient for night distinction; fig. 2 is a top view of a first insulating rod according to this embodiment.
As shown in fig. 1-2, a 10kV overhead line phase sequence card convenient for distinguishing at night provided in this embodiment includes phase sequence card 1, cross arm 5, first insulating rod 14 and second insulating rod 15, the upper end of phase sequence card 1 is equipped with cap peak 2, cap peak 2 plays the guard action to phase sequence card 1, the damage of rainwater to phase sequence card 1 has been reduced, and the upper end of cap peak 2 is equipped with installation piece 3, installation groove 4 has been seted up at the upper end middle part of installation piece 3, the diapire middle part of installation groove 4 is equipped with adsorption magnet 18, first locking groove 7 has been seted up to inner wall one side of installation groove 4, second locking groove 8 has been seted up to the inner wall opposite side of installation groove 4, first locking groove 7 and second locking groove 8 are interior horizontal cross has been equipped with locking lever 9, the outer wall of cross arm 5 has been seted up and has been locked the installation through-hole 6 that corresponds with locking lever 9, annular fixture block 10 has been cup jointed to the outer wall screw thread of locking lever 9, the outer wall one side meshing of annular fixture block 10 is connected with bevel gear 11, the lower extreme connection of bevel gear 11 has rotary rod 12, rotary rod 12 passes the outer wall of cap peak 2 and extends down, the upper end 14 of installation groove has been equipped with adsorption magnet 18, the inner wall opposite end of installation groove 4, first locking groove 8 has been provided with first locking rod 1's of insulation rod has been provided with a second locking groove 8, the first end of insulation rod 13 has been equipped with the first end of insulation rod 13 of rod 13, and is equipped with the insulation rod 13 of label rod is inserted into the first end of the insulation rod 1.
The materials of the phase sequence card 1 can be various, for example: glass phase sequence cards, metal phase sequence cards, polymer phase sequence cards, and the like.
Specifically, all adopt epoxy structure for phase sequence tablet 1, have the quality light, intensity is high, long service life's advantage.
The cross-sectional shape of the phase sequence card 1 may be various, for example: rectangular, circular, oval, etc., and preferably the phase sequence card 1 has a rectangular cross-sectional shape.
In addition, the outer surfaces of the waste heat of the mounting groove 4, the first locking groove 7 and the second locking groove 8 are provided with a rust-proof layer; because of the long exposure to the field, double rust protection is necessary to ensure longer service times.
Specifically, the lower extreme of cross arm 5 just is located the below of installation through-hole 6 and is equipped with positioning magnet 19, adsorbs on positioning magnet 19 through adsorption magnet 18, can be easily fix a position the position of installation through-hole 6, and the locking lever 9 of being convenient for inserts installation through-hole 6 to lock installation piece 3 and cross arm 5 together.
Specifically, the inside of installation piece 3 is equipped with the annular spacing groove that corresponds with annular fixture block 10, and annular fixture block 10 prevents annular fixture block 10 from moving about when annular spacing inslot rotates, plays spacing effect.
A soft cushion is arranged in the annular limiting groove; the friction force of the annular clamping block 10 relative to the annular limiting groove can be increased through the soft cushion, the annular clamping block 10 is more ensured not to move left and right, and the limiting effect is achieved.
Specifically, the sign 17 is made of high-reflection materials, so that workers can conveniently patrol at night, and inconvenience in observation due to overhigh installation position and darker light is avoided.
Further, the color of the phase sequence card 1 is any one of a red phase sequence card, a yellow phase sequence card, a green phase sequence card or a blue phase sequence card.
Further, the marks 17 on the phase sequence cards 1 are hollowed-out.
Further, the mark 17 is hollowed-out to form a A, B, C, N hollow pattern.
The phase sequence cards 1 with different colors are utilized for distinguishing the phase sequences, for example, a yellow phase sequence card is used for the A phase, a green phase sequence card is used for the B phase, a red phase sequence card is used for the C phase, and a glass phase sequence is used for the N phase, so that the distinction is convenient.
The sign 17 on the phase sequence plate 1 is hollowed out to form a A, B, C, N hollow pattern, so that the phase sequence and the neutral line N of the three-phase power supply A, B, C can be distinguished, and meanwhile, the resistance of wind and air flow to the phase sequence plate 1 is greatly reduced.
In addition, the mark 17 can adopt the three-dimensional structure that night light ABS consumptive material 3D printed, adopts 3D printing technique to print, and adopts night light ABS consumptive material, not only has night vision effect, can clearly see clearly the phase place sign at night, moreover, with the phase sequence information plastic envelope of 3D printing in phase sequence tablet 1, whole mark 17 is solid structure, can not fade.
ABS (original name acrylonitrile-butadiene-styrene copolymer) is an ancestor of household Fused Deposition (FDM) wire. ABS resin is the polymer with the largest output and the most wide application at present, and organically unifies the various performances of PS, SAN and BS, and has excellent mechanical properties of toughness, hardness and rigidity. ABS is a terpolymer of acrylonitrile, butadiene and styrene, a represents acrylonitrile, B represents butadiene, S represents styrene.
Further, the materials of the first insulating rod 14 and the second insulating rod 15 are any one of rubber, plastic and plastic.
Preferably, the materials of the first insulating rod 14 and the second insulating rod 15 are rubber; can effectively avoid the occurrence of rusting or the phenomenon of continuous electricity in the rainy days.
Because the 10kV overhead line phase sequence cards convenient to distinguish at night are mostly made of insulating materials, power is not required to be cut off during installation, and an installer can realize safe installation, so that inconvenience brought to industrial production and resident life by a power-off phenomenon in the installation process of the phase sequence cards is effectively avoided, the working intensity of the installer is greatly reduced, the installation efficiency of the phase sequence cards is improved, and the win-win effect of the economic benefit and the social benefit of a power supply system is ensured.
Further, the cap peak 2 is fixedly connected with the phase sequence plate 1.
Specifically, the visor 2 and the phase sequence plate 1 may be connected in various manners, for example: welding, through bolted connection, through buckle connection etc., preferably, the connection mode of brim of a hat 2 and phase sequence tablet 1 is through bolted connection.
Working principle: in the embodiment of the invention, during installation, the second insulating rod 15 is inserted into the supporting groove 16, so that the phase sequence card 1 is lifted below the cross arm 5 through the second insulating rod 15, the cross arm 5 is horizontally placed into the installation groove 4, the position of the installation through hole 6 can be easily positioned through the adsorption magnet 18 and adsorbed onto the positioning magnet 19, the first insulating rod 14 is lifted, the rotating rod 12 is inserted into the clamping groove 13, the first insulating rod 14 is rotated, the bevel gear 11 drives the annular clamping block 10 to rotate, the locking rod 9 is enabled to move in a rotating manner and is inserted into the first locking groove 7 after penetrating through the installation through hole 6, the installation block 3 and the cross arm 5 are easily locked through the locking rod 9, the installation is completed after the first insulating rod 14 and the second insulating rod 15 are removed, the cap 2 is arranged at the upper end of the phase sequence card 1, the cap 2 plays a role in protecting the phase sequence card 1, the damage to the phase sequence card 1 due to rainwater is reduced, the material of the mark 17 is high reflective, and workers can conveniently observe the position at night, and light is prevented from being excessively dark due to the fact that the light is not convenient to observe.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; 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 or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The utility model provides a 10kV overhead line phase sequence tablet convenient to distinguish night, its characterized in that includes phase sequence tablet (1), cross arm (5), first insulating rod (14) and second insulating rod (15), the upper end of phase sequence tablet (1) is equipped with brim of a hat (2), and the upper end of brim of a hat (2) is equipped with installation piece (3), mounting groove (4) have been seted up at the upper end middle part of installation piece (3), the diapire middle part of mounting groove (4) is equipped with adsorption magnet (18), first locking groove (7) have been seted up to inner wall one side of mounting groove (4), second locking groove (8) have been seted up to inner wall opposite side of mounting groove (4), level crossing has locking lever (9) in first locking groove (7) and second locking groove (8), mounting hole (6) corresponding with locking lever (9) have been seted up to the outer wall screw thread of locking lever (9), annular fixture block (10) have been seted up at outer wall one side of annular fixture block (10) meshing is connected with bevel gear (11), the lower extreme that extends down of bevel gear (12) has been seted up and has been supplied bevel gear (12) to extend down, the end (12) of rotating rod (12) has been extended down, the end (12) has been connected down, the lower end of the phase sequence card (1) is provided with a supporting groove (16) for inserting a second insulating rod (15), and the outer wall of the phase sequence card (1) is provided with an identifiable mark (17);
the lower end of the cross arm (5) is provided with a positioning magnet (19) below the mounting through hole (6);
an annular limiting groove corresponding to the annular clamping block (10) is formed in the mounting block (3);
insert supporting slot (16) with second insulating rod (15), lift cross arm (5) below with phase sequence tablet (1) through second insulating rod (15), put into mounting groove (4) with cross arm (5) level, adsorb on location magnet (19) through adsorption magnet (18), can fix a position of installing through-hole (6), lift first insulating rod (14) and make rotary rod (12) insert in draw-in groove (13), rotate first insulating rod (14), make bevel gear (11) drive annular fixture block (10) rotate, make locking lever (9) rotate and remove and insert in first locking groove (7) after running through installation through-hole (6), lock installation piece (3) and cross arm (5) together through locking lever (9), accomplish the installation after taking down first insulating rod (14) and second insulating rod (15).
2. The 10kV overhead line phase sequence card convenient for night distinguishing according to claim 1, wherein a soft cushion is arranged inside the annular limiting groove.
3. The 10kV overhead line phase sequence plate convenient for night distinguishing according to claim 1, wherein the sign (17) is made of a high-reflection material.
4. A 10kV overhead line phase sequence card for facilitating night discrimination according to claim 3, wherein the color of the phase sequence card (1) is any one of a red phase sequence card, a yellow phase sequence card, a green phase sequence card, or a blue phase sequence card.
5. The 10kV overhead line phase sequence card convenient for night distinguishing according to claim 1, wherein the mark (17) on the phase sequence card (1) is hollowed-out.
6. The 10kV overhead line phase sequence card for facilitating night discrimination according to claim 5, wherein the sign (17) is hollowed-out to form a A, B, C, N-shaped hollow pattern.
7. The 10kV overhead line phase sequence card for facilitating night discrimination according to claim 1, wherein the material of the first insulating rod (14) and the second insulating rod (15) is any one of rubber, plastic, and plastic.
8. The 10kV overhead line phase sequence card convenient for night distinguishing according to claim 1, wherein the cap peak (2) is fixedly connected with the phase sequence card (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810726705.XA CN108922378B (en) | 2018-07-04 | 2018-07-04 | 10kV overhead line phase sequence board convenient to distinguish at night |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810726705.XA CN108922378B (en) | 2018-07-04 | 2018-07-04 | 10kV overhead line phase sequence board convenient to distinguish at night |
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| Publication Number | Publication Date |
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| CN108922378A CN108922378A (en) | 2018-11-30 |
| CN108922378B true CN108922378B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810726705.XA Active CN108922378B (en) | 2018-07-04 | 2018-07-04 | 10kV overhead line phase sequence board convenient to distinguish at night |
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Citations (5)
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|---|---|---|---|---|
| CN202662230U (en) * | 2012-05-24 | 2013-01-09 | 邢台供电公司 | Phase sequence board of power transmission line |
| CN104158123A (en) * | 2014-09-05 | 2014-11-19 | 国家电网公司 | Overhead line phase sequence plate hot-line assembly and disassembly method and assembling device |
| CN205788984U (en) * | 2016-05-20 | 2016-12-07 | 国网山东省电力公司枣庄供电公司 | A kind of transmission line of electricity self-retaining formula reflective shaft tower phase-sequence plate |
| CN205831242U (en) * | 2016-05-31 | 2016-12-28 | 象山小花园古典鞋业有限公司 | A kind of device with corase grind and two kinds of functions of fine grinding leather shoes |
| CN207149202U (en) * | 2017-09-13 | 2018-03-27 | 广东电网有限责任公司佛山供电局 | Novel power transmission line Phases sign board |
-
2018
- 2018-07-04 CN CN201810726705.XA patent/CN108922378B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202662230U (en) * | 2012-05-24 | 2013-01-09 | 邢台供电公司 | Phase sequence board of power transmission line |
| CN104158123A (en) * | 2014-09-05 | 2014-11-19 | 国家电网公司 | Overhead line phase sequence plate hot-line assembly and disassembly method and assembling device |
| CN205788984U (en) * | 2016-05-20 | 2016-12-07 | 国网山东省电力公司枣庄供电公司 | A kind of transmission line of electricity self-retaining formula reflective shaft tower phase-sequence plate |
| CN205831242U (en) * | 2016-05-31 | 2016-12-28 | 象山小花园古典鞋业有限公司 | A kind of device with corase grind and two kinds of functions of fine grinding leather shoes |
| CN207149202U (en) * | 2017-09-13 | 2018-03-27 | 广东电网有限责任公司佛山供电局 | Novel power transmission line Phases sign board |
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| CN108922378A (en) | 2018-11-30 |
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