CN111495810B - Cleaning device for bird droppings on surface of high-altitude insulator - Google Patents
Cleaning device for bird droppings on surface of high-altitude insulator Download PDFInfo
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- CN111495810B CN111495810B CN202010403436.0A CN202010403436A CN111495810B CN 111495810 B CN111495810 B CN 111495810B CN 202010403436 A CN202010403436 A CN 202010403436A CN 111495810 B CN111495810 B CN 111495810B
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- 239000012212 insulator Substances 0.000 title claims abstract description 69
- 238000004140 cleaning Methods 0.000 title claims abstract description 56
- 210000003608 fece Anatomy 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- 210000000225 synapse Anatomy 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Insulators (AREA)
Abstract
The invention belongs to the technical field of power grid maintenance, and particularly relates to a cleaning device for bird droppings on the surface of an overhead insulator, which aims at the problem that the existing cleaning device can only wash stains attached to the surface of the existing cleaning device and now provides the following scheme. When the insulator cleaning device is used for cleaning the insulator, a user only needs to hold the straight rod shell at the far end, then the insulator to be cleaned is sleeved on the inner wall of the arc-shaped cleaning ring, and then the ejector rod is pulled back and forth to conduct physical contact brushing on the outer wall of the rubber brush hair insulator, so that stubborn stains are removed.
Description
Technical Field
The invention relates to the technical field of power grid maintenance, in particular to a cleaning device for bird droppings on the surface of a high-altitude insulator.
Background
The insulator is a special insulating control part and can play an important role in an overhead transmission line, the insulator is generally arranged on a telegraph pole, and an existing cleaning device is high in difficulty when the insulator is cleaned due to the fact that the telegraph pole is high, so that technical innovation needs to be conducted on the basis of the existing cleaning device aiming at the problems.
However, in the prior art, most of the insulators are cleaned by climbing high towers by workers and carrying out high-pressure water washing on the insulators by a heavy sprayer, and although the mode can wash dust just falling on the surfaces of the insulators to a certain extent, the device has the following defects that the water pressure of the washer is related to the distance, the washing effect is poorer when the water pressure is smaller when the distance is longer, and finally, the wastes such as stubborn dirt of bird dung and the like which are attached to the surfaces of the insulators earlier cannot be washed clean, and finally, the cleaning mode wastes too much water and is undoubtedly manual labor for high-altitude cleaning operation.
Disclosure of Invention
Based on the technical problem that the existing cleaning device can only wash stains which are not hard to adhere to the surface, the invention provides a cleaning device for bird droppings on the surface of a high-altitude insulator.
The invention provides a cleaning device for bird droppings on the surface of an overhead insulator, which comprises a first shell with a C-shaped cross section and an overall arc-shaped structure, wherein a straight rod shell is welded at one end of the first shell, the inner size of the straight rod shell is the same as that of the first shell, an arc-shaped fixing ring is connected in a sliding groove of the first shell in a sliding way, an inner clamping groove is formed in the middle of one side of an inner arc of the arc-shaped fixing ring, an arc-shaped cleaning ring with an inner cavity and an arc-shaped structure is clamped in the inner clamping groove, jacks distributed equidistantly are formed in the inner arc side of the arc-shaped cleaning ring, rubber bristles are inserted in the jacks, synapses distributed in an equidistant and staggered manner are arranged on the circumferential outer wall of each rubber bristle, the diameter of the inner side of the arc-shaped cleaning ring is larger than the maximum outer diameter of the insulators, the upper height and the lower height of the arc-shaped cleaning ring are larger than the distance between the two adjacent insulators, and ejector rods are fixed at the end parts of the arc-shaped fixing ring, and the ejector rod is made of a material with certain toughness.
According to the preferable scheme, ball grooves distributed at equal intervals are formed in the side, close to the edge, of the arc-shaped fixing ring, close to the bottom of the groove, and balls are clamped in the ball grooves.
Preferably, the arc-shaped cleaning ring is composed of a C-shaped ring, a spring piece, a rubber layer, a compression spring and rubber bristles fixed on the surface of the rubber layer, the C-shaped ring is clamped in the inner clamping groove, the spring piece is fixed at the opening of the C-shaped ring through a bolt, and the rubber layer is fixed on the surface of the spring piece.
As a preferable scheme in the invention, fixed columns distributed at equal intervals are fixed at the bottom of the C-shaped ring, the end part of the compression spring is sleeved on the circumferential outer wall of each fixed column, and a T-shaped support block is inserted at one end of the compression spring, which is far away from each fixed column.
As the preferable scheme of the invention, the arc-shaped back surface of the arc-shaped fixing ring is provided with the annular clamping groove, the end part of the annular clamping groove is clamped with the fixing block, and one end of the fixing block, which is close to the ejector rod, is provided with the screw hole matched with the fixing block.
According to the preferable scheme of the invention, a steel wire rod core is embedded in the middle of the ejector rod, a steel ball is fixed at one end, far away from the fixed block, of the steel wire rod core, and a handle is arranged at one end, far away from the fixed block, of the circumferential outer wall of the ejector rod.
According to the preferable scheme, the clamping plate is welded on the outer wall of the support rod shell close to the top end, two self-locking screw holes are formed in the horizontal plate of the clamping plate, and fastening bolts are screwed in the self-locking screw holes.
As a preferable scheme in the invention, clamping rings which are distributed at equal intervals are fixed on the circumferential inner wall of the first shell close to the top end of the first shell through bolts, and the same spray pipe is clamped in the clamping rings.
In a preferred embodiment of the present invention, the wall of the nozzle is fixed with a centrally distributed atomizer near the obliquely lower side, and the axis of the atomizer faces the insulator in the middle.
The beneficial effects of the invention are as follows:
1. this kind of belt cleaning device to high altitude insulator surface bird droppings cleans the ring through setting up fixed ring of arc and the arc of sliding connection in shell one inside, can be when wasing the insulator, only need the user to hold the straight-bar shell in the distal end, later will treat abluent insulator cup joint the inner wall that cleans the ring at the arc again can, later make a round trip to draw the ejector pin again and drag and carry out the physical contact brush to the outer wall that lets rubber brush hair insulator and wipe to clear away mummified bird droppings.
2. This kind of belt cleaning device to high altitude insulator surface bird excrement through setting up the ball of joint in the ball inslot, can reduce frictional force when the inside gliding of shell one when needs promote the solid fixed ring of arc, and gliding is more smooth and easy, and then reduces the resistance to the operator when promoting.
3. This kind of belt cleaning device to high altitude insulator surface bird excrement through spring leaf and the compression spring that sets up, can have certain resilience space when the rubber brush hair receives the thrust that comes from the insulator when using to can let the perpendicular contact of rubber brush hair and the insulator surface of different angles, let the sunken degree on rubber layer and the convexity looks adaptation on insulator surface promptly, thereby improved the cleaning performance.
4. This kind of belt cleaning device to high altitude insulator surface bird excrement through the spray tube that sets up and the atomizer that distributes entad, can spray the washing liquid in order diluting the softening to attaching to the dry bird excrement on insulator surface to the surface of insulator earlier before the use, has reduced the washing degree of difficulty.
The device has the same or can be realized by adopting the prior art, and has the advantages of simple structure, light weight and capability of being contacted with a farther place.
Drawings
FIG. 1 is a schematic cross-sectional structural view of a cleaning device for bird droppings on the surface of an overhead insulator, which is provided by the invention;
FIG. 2 is a schematic perspective view of an arc-shaped fixing ring of the cleaning device for bird droppings on the surface of the high-altitude insulator, which is provided by the invention;
FIG. 3 is an enlarged schematic structural view of a part A in FIG. 1 of the cleaning device for bird droppings on the surface of the high-altitude insulator, which is provided by the invention;
FIG. 4 is a schematic perspective view of a casing of a cleaning device for bird droppings on the surface of an overhead insulator according to the present invention;
fig. 5 is a schematic perspective view of an arc-shaped cleaning ring of a cleaning device for bird droppings on the surface of an overhead insulator.
In the figure: 1 shell I, 2 arc-shaped fixing rings, 201 inner clamping grooves, 3 spray pipes, 4 atomizing nozzles, 5 clamping rings, 6 arc-shaped cleaning rings, 7 compression springs, 8 fixing columns, 9 fixing blocks, 10 ejector rods, 1001 handles, 1002 steel wire rod cores, 1003 steel balls, 11T-shaped supporting blocks, 12 insulators, 13 rubber bristles, 1301 synapses, 14 ball grooves, 15 balls, 16 annular clamping grooves I, 17 straight rod shells, 1701 clamping plates and 1702 self-locking bolts.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, a cleaning device for bird droppings on the surface of an overhead insulator comprises a first shell 1 with a C-shaped cross section and an arc-shaped structure as a whole, wherein a straight rod shell 17 is welded at one end of the first shell 1, the inner size of the straight rod shell 17 is the same as that of the first shell 1, an arc-shaped fixing ring 2 is connected in a sliding chute of the first shell 1 in a sliding manner, an inner clamping groove 201 is formed in the middle of one side of an inner arc of the arc-shaped fixing ring 2, an arc-shaped cleaning ring 6 with a cavity in an arc-shaped structure is clamped in the inner clamping groove 201, jacks distributed equidistantly are formed in the inner arc side of the arc-shaped cleaning ring 6, rubber bristles 13 are inserted in the jacks, synapses 1301 distributed equidistantly in a staggered manner are arranged on the circumferential outer wall of the rubber bristles 13, the inner diameter of the arc-shaped cleaning ring 6 is larger than the maximum outer diameter of the insulators 12, and the upper and lower height of the arc-shaped cleaning ring 6 is larger than the distance between two adjacent insulators 12, the tip of the fixed ring 2 of arc is fixed with ejector pin 10, and ejector pin 10 is for having the material of certain toughness to make, can be when wasing the insulator, only need the user to hand straight-bar shell 17 at the distal end, later will treat that abluent insulator cup joints the inner wall that the ring 2 was cleaned in the arc again can, later draw ejector pin 10 back and forth again and can carry out the physical contact brush to the outer wall that lets rubber brush hair 13 insulator 12 and wipe, thereby clear away stubborn spot.
According to the invention, the ball grooves 14 distributed equidistantly are formed in the side, close to the edge, of the arc-shaped fixing ring 2 close to the bottom of the groove, and the balls 15 are clamped in the ball grooves 14, so that when the arc-shaped fixing ring 2 is required to be pushed to slide in the shell 1 in use, the friction force is reduced, the sliding is smoother, and the resistance to an operator is reduced when the arc-shaped fixing ring 2 is pushed to slide in use.
The arc-shaped cleaning ring 6 is composed of a C-shaped ring, a spring piece, a rubber layer, a compression spring 7 and rubber bristles 13 fixed on the surface of the rubber layer, the C-shaped ring is clamped in the inner clamping groove 201, the spring piece is fixed at the opening of the C-shaped ring through a bolt, and the rubber layer is fixed on the surface of the spring piece.
Wherein, the tank bottom that the C encircled is fixed with the fixed column 8 that the equidistance distributes, and compression spring 7's tip cup joints on fixed column 8's circumference outer wall, compression spring 7 is kept away from the one end of fixed column 8 and is pegged graft and have T shape tray 11, thereby can be when using, there is certain resilience space when rubber brush hair 13 receives the thrust of the reaction from insulator 12, thereby can let rubber brush hair and the perpendicular contact in surface of insulator 12 of different angles, let the sunken degree on rubber layer and the convexity looks adaptation on insulator 12 surface promptly, thereby improved the cleaning performance.
The arc-shaped back surface of the arc-shaped fixing ring 2 is provided with an annular clamping groove 16, the end part of the annular clamping groove 16 is clamped with a fixing block 9, and one end, close to the ejector rod 10, of the fixing block 9 is provided with a screw hole matched with the fixing block for fixing the ejector rod 10.
Wherein, the middle of ejector pin 10 is inlayed and is equipped with steel wire pole core 1002, and the one end that the fixed block 9 was kept away from to steel wire pole core 1002 is fixed with steel ball 1003, and the one end that the circumference outer wall of ejector pin 10 kept away from fixed block 9 is provided with handle 1001.
Wherein, the outer wall of branch shell 17 is close to the top welding and has cardboard 1701, and opens on the horizontal plate of cardboard 1701 has two auto-lock screws, and all the spiro union has fastening bolt in the auto-lock screw for fixed ram prevents that the user from reaching the insulator 12 of distal end, thereby can touch the insulator 12 of more distant place when letting the use.
Wherein, the circumference inner wall of shell 1 is close to the top and is fixed with the snap ring 5 that the equidistance distributes through the bolt, and has same spray tube 3 in the snap ring 5 joint.
Wherein, the pipe wall of spray tube 3 is close to and is fixed with atomizer 4 that the centripetal distributes to oblique below, and atomizer 4's axial lead is towards middle insulator 12 to can spray the washing liquid in order to dilute the softening to the bird excrement that adheres to insulator 12 surface to the surface of insulator 12 in advance before the use, reduce the washing degree of difficulty.
The working principle is as follows: when the surface of insulator 12 needs to be cleaned, the inlet pipe is connected to the water inlet end of the spray pipe 3, the cleaning liquid is sprayed on the surface of the insulator 12 to dilute and soften the bird dung attached to the surface of the insulator 12, and the cleaning difficulty in the later period is reduced. Then, a user only needs to hold the straight rod shell 17 at the far end, then the insulator to be cleaned is sleeved on the inner wall of the arc-shaped cleaning ring 2, and then the ejector rod 10 is pulled back and forth, so that the outer wall of the insulator 12 with the rubber bristles 13 can be subjected to physical contact brushing, and stubborn stains are removed; if the user does not reach the insulator 12 at the far end, the ram is fixed in the chuck plate 1701 with a fastening bolt, so that the insulator 12 at a further far end can be touched in use.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A cleaning device for bird droppings on the surface of an overhead insulator comprises a first shell (1) with a C-shaped structure in section and an arc-shaped structure as a whole, wherein a straight rod shell (17) is welded at one end of the first shell (1), the inner size of the straight rod shell (17) is the same as that of the first shell (1), the cleaning device is characterized in that an arc-shaped fixing ring (2) is connected in a sliding groove of the first shell (1) in a sliding manner, an inner clamping groove (201) is formed in the middle of one side of an inner arc of the arc-shaped fixing ring (2), an arc-shaped cleaning ring (6) with a cavity in an arc-shaped structure is clamped in the inner clamping groove (201), jacks distributed equidistantly are formed in the inner arc side of the arc-shaped cleaning ring (6), rubber bristles (13) are inserted in the jacks, synapses (1301) distributed equidistantly and staggered in a staggered manner are arranged on the outer wall of the circumference of the rubber bristles (13), and the inner diameter of the arc-shaped cleaning ring (6) is larger than the maximum outer diameter of the insulator (12), the upper and lower heights of the arc-shaped cleaning ring (6) are greater than the distance between two adjacent insulators (12), an ejector rod (10) is fixed at the end part of the arc-shaped fixing ring (2), and the ejector rod (10) is made of a material with certain toughness;
annular groove (16) are opened to the bow-shaped back of arc-shaped fixed ring (2), and the tip joint of annular groove (16) has fixed block (9), and the one end that fixed block (9) are close to ejector pin (10) is opened has the screw of looks adaptation with it, the centre of ejector pin (10) is inlayed and is equipped with steel wire rod core (1002), and steel wire rod core (1002) keep away from the one end of fixed block (9) and be fixed with steel ball (1003), and the one end that fixed block (9) were kept away from to the circumference outer wall of ejector pin (10) is provided with handle (1001).
2. The cleaning device for bird droppings on the surface of the high-altitude insulator is characterized in that ball grooves (14) distributed at equal intervals are formed in the side, close to the bottom of the groove, of the arc-shaped fixing ring (2) close to the edge, and balls (15) are clamped in the ball grooves (14).
3. The cleaning device for bird droppings on the surface of the high-altitude insulator is characterized in that the arc-shaped cleaning ring (6) is composed of a C-shaped ring, a spring leaf, a rubber layer, a compression spring (7) and rubber bristles (13) fixed on the surface of the rubber layer, the C-shaped ring is clamped in an inner clamping groove (201), the spring leaf is fixed at an opening of the C-shaped ring through a bolt, and the rubber layer is fixed on the surface of the spring leaf.
4. The cleaning device for bird droppings on the surface of the high-altitude insulator is characterized in that fixing columns (8) distributed equidistantly are fixed at the bottom of the C-shaped ring, the end part of a compression spring (7) is sleeved on the outer circumferential wall of each fixing column (8), and a T-shaped support block (11) is inserted into one end, far away from the fixing columns (8), of the compression spring (7).
5. The cleaning device for bird droppings on the surface of the high-altitude insulator is characterized in that a clamping plate (1701) is welded to the outer wall of the straight rod casing (17) close to the top end, two self-locking screw holes are formed in a horizontal plate of the clamping plate (1701), and fastening bolts are screwed in the self-locking screw holes.
6. The cleaning device for bird droppings on the surface of the high-altitude insulator is characterized in that snap rings (5) which are distributed at equal intervals are fixed on the circumferential inner wall of the first shell (1) close to the top end of the first shell through bolts, and the same spray pipe (3) is clamped in the snap rings (5).
7. The cleaning device for bird droppings on the surface of an overhead insulator is characterized in that atomizing nozzles (4) which are distributed centripetally are fixed on the pipe wall of the spray pipe (3) close to the obliquely lower part, and the axial lines of the atomizing nozzles (4) face to the insulator (12) in the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403436.0A CN111495810B (en) | 2020-05-13 | 2020-05-13 | Cleaning device for bird droppings on surface of high-altitude insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010403436.0A CN111495810B (en) | 2020-05-13 | 2020-05-13 | Cleaning device for bird droppings on surface of high-altitude insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111495810A CN111495810A (en) | 2020-08-07 |
| CN111495810B true CN111495810B (en) | 2022-07-05 |
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| CN202010403436.0A Active CN111495810B (en) | 2020-05-13 | 2020-05-13 | Cleaning device for bird droppings on surface of high-altitude insulator |
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| CN (1) | CN111495810B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370564B (en) * | 2020-10-15 | 2023-10-27 | 中国移动通信集团浙江有限公司 | Communication base station system convenient to overhaul |
| CN112886473B (en) * | 2021-03-25 | 2022-04-19 | 江苏安泰输变电工程有限公司 | Special maintenance equipment for high-voltage electric power outdoor severe environment |
| CN116967173B (en) * | 2023-09-22 | 2023-12-12 | 江苏中鹏电气有限公司 | Electrical equipment cleaning device |
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| CN104984940A (en) * | 2015-06-05 | 2015-10-21 | 国家电网公司 | Automatic cleaning device for dirt on surface of insulator |
| CN206535794U (en) * | 2017-02-08 | 2017-10-03 | 国网山东省电力公司莱州市供电公司 | A kind of insulator cleaning device conveniently cleaned |
| CN107257103A (en) * | 2017-06-12 | 2017-10-17 | 国网山东省电力公司平原县供电公司 | Voltage for Insulators on HV Lines automatic cleaning instrument |
| CN109107929A (en) * | 2018-08-24 | 2019-01-01 | 芜湖市凯鑫避雷器有限责任公司 | A kind of cleaning device of insulator |
| CN208800428U (en) * | 2018-09-21 | 2019-04-30 | 昆明和玘电力设备有限公司 | Hand-held live insulator cleaning apparatus |
| CN210253212U (en) * | 2019-07-31 | 2020-04-07 | 国网河南省电力公司西峡县供电公司 | Upright post insulator cleaning tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11148177B2 (en) * | 2018-08-23 | 2021-10-19 | Venkata Rama Subba Rao Chundi | Insulator cleaner |
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2020
- 2020-05-13 CN CN202010403436.0A patent/CN111495810B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984940A (en) * | 2015-06-05 | 2015-10-21 | 国家电网公司 | Automatic cleaning device for dirt on surface of insulator |
| CN206535794U (en) * | 2017-02-08 | 2017-10-03 | 国网山东省电力公司莱州市供电公司 | A kind of insulator cleaning device conveniently cleaned |
| CN107257103A (en) * | 2017-06-12 | 2017-10-17 | 国网山东省电力公司平原县供电公司 | Voltage for Insulators on HV Lines automatic cleaning instrument |
| CN109107929A (en) * | 2018-08-24 | 2019-01-01 | 芜湖市凯鑫避雷器有限责任公司 | A kind of cleaning device of insulator |
| CN208800428U (en) * | 2018-09-21 | 2019-04-30 | 昆明和玘电力设备有限公司 | Hand-held live insulator cleaning apparatus |
| CN210253212U (en) * | 2019-07-31 | 2020-04-07 | 国网河南省电力公司西峡县供电公司 | Upright post insulator cleaning tool |
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| CN111495810A (en) | 2020-08-07 |
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Effective date of registration: 20220613 Address after: 100032 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: Shiyan power supply company of State Grid Hubei Electric Power Co., Ltd Address before: 350108 No.2, wulongjiang North Avenue, Fuzhou University Town, Fuzhou City, Fujian Province Applicant before: Jin Jun |
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