CN110718353A - Magnetic anti-resonance oil-immersed transformer - Google Patents
Magnetic anti-resonance oil-immersed transformer Download PDFInfo
- Publication number
- CN110718353A CN110718353A CN201910870321.XA CN201910870321A CN110718353A CN 110718353 A CN110718353 A CN 110718353A CN 201910870321 A CN201910870321 A CN 201910870321A CN 110718353 A CN110718353 A CN 110718353A
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- transformer main
- main body
- stained
- arc
- transformer
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- 238000003466 welding Methods 0.000 claims description 19
- 230000002265 prevention Effects 0.000 claims description 9
- 230000005389 magnetism Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 241000561734 Celosia cristata Species 0.000 claims 1
- 210000001520 comb Anatomy 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 45
- 239000002245 particle Substances 0.000 abstract description 35
- 230000000694 effects Effects 0.000 abstract description 8
- 150000002500 ions Chemical class 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 230000035508 accumulation Effects 0.000 description 4
- 230000030279 gene silencing Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
-
- 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
- B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
- B08B1/143—Wipes
-
- 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
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The invention discloses a magnetic anti-resonance oil immersed transformer, which structurally comprises a mounting seat, an air blower, an anti-magnetic-vibration device, a transformer main body, an upper end frame, a connecting end and a controller. Has the advantages that: the invention utilizes the self-rotation effect of the non-stick structure under the action of the air blower, further scrapes oil and dust particles covered at the included angle of the transformer main body through the zigzag of the arc-shaped plate, further prevents the dust particles from directly covering the surface of the transformer main body, thereby interfering the magnetic field in the transformer main body under the characteristic action that the dust particles are charged with ions, avoiding the failure of heat dissipation due to long-term accumulation, improving the temperature of the transformer main body shell, performing centralized adsorption treatment on the adhesion objects of the arc-shaped plate under the action of the magnetic eliminating mechanism, and utilizing the corresponding meshing of the zigzag of the surfaces of the convex strips and the arc-shaped plate to realize the omnibearing treatment of the adhesion objects and prevent the adhesion objects from covering the surface of the transformer main body again.
Description
Technical Field
The invention relates to the field of oil immersed transformers, in particular to a magnetic resonance prevention oil immersed transformer.
Background
The transformer is one of important devices of a power system, wherein in civil buildings and places with high fire protection requirements and severe environments, such as inflammable places, explosive places and the like, the oil-immersed transformer is mainly used as a power supply device in the power system, but the oil-immersed transformer is placed outdoors for use.
1. The equipment is placed outdoors, and under the action of force inequality of natural factors, more dust particles are easily accumulated at adjacent corners of the transformer main body, and the dust particles are free and charged, so that the magnetic interference phenomenon is caused to the transformer main body when the transformer main body operates.
2. And because this transformer is oil-immersed structure, its when normal operation, the periphery can have more oil thing and adhesion on transformer main part surface for the dust granule is a large amount of accumulations under the effect of oil thing, leads to by the inside heat that gives off of transformer main part then can increase the temperature of transformer main part shell because of the self-character of dust.
Disclosure of Invention
The invention aims to provide a magnetic anti-resonance oil-immersed transformer, aiming at solving the defects that the equipment in the prior art is placed outdoors, more dust particles are easily accumulated at the adjacent corners of a transformer main body under the action of natural factor irresistibility, the dust particles are free and charged, so that the transformer main body has a magnetic interference phenomenon when in operation, and the transformer is of an oil-immersed structure, so that more oil matters exist at the periphery and are adhered to the surface of the transformer main body when in normal operation, so that the dust particles are accumulated in a large amount under the action of the oil matters, and the temperature of the shell of the transformer main body is increased due to the self-characteristic of the dust.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides an oil-immersed transformer of magnetic resonance prevention, its structure includes mount pad, air-blower, anti-magnetic vibration device, transformer main part, upper end frame, link, controller, the air-blower is equipped with six and is three sets of installing in the mount pad left and right sides respectively and is connected through the electric welding, the anti-magnetic vibration device is equipped with two and installs respectively in transformer main part junction, the upper end frame is installed in transformer main part upper surface and is connected through the lock, the link is connected through the electric welding with the upper end frame, the controller is installed in the upper end frame upper surface and is connected through the electric welding, the anti-magnetic vibration device is including exempting from to be stained with structure, clean structure of removing, exempting from to be stained with the structure and be three sets of and be in same water flat line, exempting from to be stained with the structure and be big range of size, exempting from to be stained with the structure.
As a further scheme of the invention, the size of the non-sticky structure arranged in the middle of the three non-sticky structures is 0.8 times that of the non-sticky structures arranged on the two sides.
According to a further scheme of the invention, the non-sticking structure comprises three connecting rods, a connecting rod, a sleeving column, arc-shaped plates and a limiting spring, wherein the three connecting rods are uniformly and equidistantly arranged on the outer surface of the rotating rod and are vertically connected through electric welding, the tail ends of the connecting rods respectively extend into the sleeving column and are connected through the limiting spring, and the three arc-shaped plates are respectively connected with the sleeving column through electric welding, so that the self-rotation effect under the wind power action of a blower is favorably realized, and the included angle wall of the transformer main body is wiped.
As a further scheme of the invention, the surface of the arc-shaped plate is in a sawtooth shape and is meshed with the cleaning structure, and a layer of coarse wiping cloth is sleeved on the outer surface of the arc-shaped plate, so that the wiping treatment on the surface of the transformer main body is favorably realized.
As a further scheme of the invention, the cleaning structure comprises a silencing net, a net frame and a magnetic eliminating mechanism, wherein the net frame is arranged on the upper surface of the silencing net and is connected with the silencing net through gluing, the magnetic eliminating mechanism is arranged on the inner side of the net frame in a three-in-three group mode and corresponds to the non-sticking structure, dust covered between included angles of the transformer main body can be treated, the problem that the dust cannot be radiated due to long-term accumulation is avoided, and the temperature of the transformer main body shell is increased.
According to a further scheme of the invention, the magnetic eliminating mechanism comprises two flat elliptical frames, two grooves, a convex strip, two hollow plates and a strip absorbing plate, the two grooves are arranged on the upper side and the lower side of the flat elliptical frames respectively, the grooves and the flat elliptical frames are of an integrated structure, the two hollow plates are arranged on the inner sides of the grooves respectively and are connected through electric welding, the convex strip is provided with a plurality of strips which are arranged on the surfaces of the hollow plates in a uniform and equidistant mode respectively and are connected through electric welding, and the strip absorbing plate is provided with the inner middle of the flat elliptical frame, so that dust particles cleaned between the main body clamps of the transformer can be further treated, and the influence on a magnetic field caused by electric ions contained in the strip absorbing plate is avoided.
As a further scheme of the invention, the convex strips are arranged on the surfaces of the arc-shaped plates, the saw teeth are correspondingly meshed, and the left side and the right side of each convex strip are respectively attached with the magnetic plates, so that the adsorption of dust particles is favorably realized, and the dust particles are prevented from being in a free state, thereby generating slight magnetic field interference.
Advantageous effects of the invention
Compared with the traditional oil immersed transformer, the invention has the following beneficial effects:
the invention utilizes the self-rotation function of the non-sticky structure under the action of the air blower, further scrapes oil and dust particles covered at the included angle of the transformer main body through the zigzag shape of the arc-shaped plate, further prevents the dust particles from directly covering the surface of the transformer main body, thereby interfering the magnetic field in the transformer main body under the characteristic action that the dust particles are charged ions, avoiding the problem that the heat dissipation cannot be carried out due to long-term accumulation, and improving the temperature of the shell of the transformer main body.
Under the action of the magnetic eliminating mechanism, the invention carries out centralized adsorption treatment on oil and dust particles adhered to the arc-shaped plate, and utilizes the corresponding engagement of the raised lines and the saw-toothed shape of the surface of the arc-shaped plate to realize the omnibearing treatment on the arc-shaped plate and prevent the arc-shaped plate from covering the surface of the transformer main body again.
Drawings
Other features, objects and advantages of the invention will become more apparent from a reading of the detailed description of non-limiting embodiments with reference to the attached drawings.
In the drawings:
fig. 1 is a schematic structural diagram of an oil-immersed transformer for magnetic resonance prevention according to the present invention.
Fig. 2 is a partial structural schematic view of the magnetic vibration prevention device of the present invention.
Fig. 3 is a schematic front view of the non-stick structure of the present invention.
Fig. 4 is a schematic front view of the non-stick structure according to the present invention.
FIG. 5 is a schematic view of a cleaning structure according to the present invention.
FIG. 6 is a schematic side view of a cleaning structure according to the present invention.
In the figure: the transformer comprises a mounting seat-1, a blower-2, a magnetic vibration prevention device-3, a transformer main body-4, an upper end frame-5, a connecting end-6, a controller-7, a non-stick structure-3 a, a cleaning structure-3 b, a rotary rod-3 a1, a connecting rod-3 a2, a nesting column-3 a3, an arc-shaped plate-3 a4, a limiting spring-3 a5, a silencing net-3 b1, a net frame-3 b2, a magnetic eliminating mechanism-3 b3, a flat elliptic frame-3 b31, a groove-3 b32, a convex strip-3 b33, a hollow plate-3 b34 and a strip absorbing plate-3 b 35.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 6, the present invention provides a technical solution of an oil-immersed transformer for magnetic resonance prevention:
as shown in fig. 1-2, a magnetic resonance prevention oil immersed transformer structurally comprises a mounting base 1, a blower 2, a magnetic resonance prevention device 3, a transformer body 4, an upper end frame 5, a connecting end 6 and a controller 7, and is characterized in that: air-blower 2 is equipped with six and is three respectively and installs in the 1 left and right sides of mount pad and be connected through the electric welding, anti-magnetic vibration device 3 is equipped with two altogether and installs respectively in transformer main body 4 junction, upper end frame 5 is installed in transformer main body 4 upper surface and is connected through the lock, link 6 is connected through the electric welding with upper end frame 5, controller 7 is installed in upper end frame 5 upper surface and is connected through the electric welding, anti-magnetic vibration device 3 is including exempting from to be stained with structure 3a, clean structure 3b of removing, exempt from to be stained with structure 3a and be three a set of and be in same water flat line, exempt from to be stained with structure 3a and be big range of size, it is installed in clean structure 3b inboard to be stained with structure 3a and be even equidistance form respectively to be stained.
As shown in fig. 3, the size of the non-stick structure 3a disposed in the middle of the three non-stick structures 3a is 0.8 times that of the non-stick structures 3a disposed on the two sides.
As shown in fig. 2-4, it includes rotary rod 3a1, connecting rod 3a2, registrate post 3a3, arc 3a4, spacing spring 3a5 to exempt from to be stained with structure 3a, connecting rod 3a2 is equipped with three altogether and is installed in rotary rod 3a1 surface and is connected perpendicularly through the electric welding in even equidistance form respectively, connecting rod 3a2 end stretches into respectively and registrate post 3a3 inside and is connected through spacing spring 3a5, arc 3a4 is equipped with three altogether and is connected through the electric welding with registrate post 3a3 respectively, is favorable to realizing doing the autogyration under the wind-force effect of air-blower 2 to do the wiping to transformer body 4 presss from both sides the angle wall.
As shown in fig. 3-4, the surface of the arc-shaped plate 3a4 is zigzag and is engaged with the cleaning structure 3b, and a layer of rough wiping cloth is sleeved on the outer surface of the arc-shaped plate 3a4, which is beneficial to wiping the surface of the transformer body 4.
As shown in fig. 2, the purification structure 3b includes noise damping net 3b1, net frame 3b2, magnetism elimination mechanism 3b3, net frame 3b2 is installed in noise damping net 3b1 upper surface and is connected through the veneer, magnetism elimination mechanism 3b3 is that three are a set of and installs in net frame 3b2 inboard and corresponding with exempting from to be stained with structure 3a, is favorable to realizing doing the processing to the dust that covers between 4 contained angles of transformer body to avoid leading to it can't do the heat dissipation because of long-term piling up, and improve the temperature of transformer body 4 shell.
As shown in fig. 5-6, the magnetism elimination mechanism 3b3 includes flat oval frame 3b31, recess 3b32, sand grip 3b33, fretwork board 3b34, inhale slat 3b35, recess 3b32 is equipped with two altogether and installs respectively in flat oval frame 3b31 downside, recess 3b32 and flat oval frame 3b31 are the integrated structure, fretwork board 3b34 is equipped with two altogether and installs respectively in recess 3b32 inboard and is connected through the electric welding, sand grip 3b33 is equipped with a plurality of and is even equidistance respectively and installs in fretwork board 3b34 surface and is connected through the electric welding, inhale slat 3b35 and be equipped with flat oval frame 3b31 middle part in, be favorable to realizing making further processing with the granule of dust cleaning between transformer body 4 presss from both sides to avoid leading to influencing the magnetic field because of the ion that it self contains.
As shown in fig. 6, the convex strips 3b33 are installed on the surface of the arc-shaped plate 3a4, and the saw teeth are correspondingly engaged with each other, and magnetic plates are attached to the left and right sides of the convex strips 3b33, so that the dust particles are adsorbed and prevented from being dissociated, and slight magnetic field interference is generated.
In conclusion, the dust particles and oil substances covered at the included angle of the transformer main body 4 are prevented from being scratched by the non-staining structure 3a, so that the thick covering of the dust particles and the oil substances on the surface of the transformer main body 4 is avoided, the heat dissipation of the transformer main body is influenced, the temperature of the shell of the transformer main body 4 is gradually increased, meanwhile, the dust particles adhered to the surface of the arc-shaped plate 3a4 are subjected to concentrated adsorption treatment under the action of the cleaning structure 3b, and the interference on the magnetic field inside the transformer main body 4 is avoided under the characteristic action of self electrification.
The specific realization principle is as follows: place equipment outdoors when using, and under the effect of the inequality power of natural factor, the adjacent contained angle department of transformer main part 4 easily appears and has more dust particle to pile up, because of the dust particle is free charged ion, lead to transformer main part 4 when the operation, magnetic interference phenomenon has appeared to it, and because of this transformer is oily formula structure, when it is normally operating, the periphery can appear and have more oil thing and adhesion on transformer main part 4 surface, make the dust particle be a large amount of accumulations under the effect of oil thing, lead to the heat that gives out by transformer main part 4 inside because of the self-character of dust, then can increase the temperature of transformer main part 4 shell.
Therefore, the non-sticky structure 3a is used for rotating under the action of the blower 2, the arc-shaped plate 3a4 is further used for scraping and contacting dust particles covered on the adjacent partition walls of the transformer main body 4 under the rotating action of the rotating rod 3a1, the rough cotton cloth arranged on the surface of the arc-shaped plate 3a4 can effectively treat oil objects to prevent more oil objects from being accumulated at the included angle of the transformer main body 4, so that dust in the air is adhered, the dust particles are free charged ions, when the dust particles are intensively combined with the oil objects and cover the surface of the transformer main body 4, under the characteristic action of the dust particles, the magnetic interference phenomenon can be directly generated when the transformer main body 4 operates, the oil objects and the dust particles adhered on the surface are scraped by the arc-shaped plate 3a4, and when the dust particles rotate to the magnetic eliminating mechanism 3b3, the convex strips 3b33 are correspondingly engaged with the saw teeth on the surface, under the mutual cooperation of the magnetic plates arranged on the left side and the right side of the convex strip 3b33 and the attraction strip plate 3b35, the scraped objects on the surface of the arc-shaped plate 3a4 are intensively treated so as to avoid being adhered to the transformer main body 4 again.
The invention solves the problems that in the prior art, because the equipment is placed outdoors, under the action of the ineffectiveness of natural factors, more dust particles are easily accumulated at the adjacent corners of the transformer main body, and because the dust particles are free and charged, the magnetic interference phenomenon is caused when the transformer main body operates, and because the transformer is of an oil-immersed structure, more oil substances are present at the periphery and are adhered to the surface of the transformer main body when the transformer operates normally, so that the dust particles are accumulated in a large quantity under the action of the oil substances, the heat emitted from the interior of the transformer main body can increase the temperature of the shell of the transformer main body due to the self-characteristic of the dust, and through the mutual combination of the components, the invention utilizes the adhesion-free structure to have the self-rotation action under the action of an air blower, and further conducts scraping and rubbing treatment on the oil substances and the dust particles covered at the corners of the transformer main body through the zigzag shape of the arc-shaped plates, the invention can perform centralized adsorption treatment on oil and dust particles adhered to the arc-shaped plate under the action of the magnetic eliminating mechanism, and utilizes the corresponding engagement of the raised strips and the saw-toothed shape of the surface of the arc-shaped plate to realize omnibearing treatment of the dust particles and prevent the dust particles from covering the surface of the transformer main body again.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics 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 (4)
1. The utility model provides an oil-immersed transformer of magnetic resonance that prevents, its structure includes mount pad (1), air-blower (2), anti-magnetic vibration device (3), transformer main part (4), upper end frame (5), link (6), controller (7), its characterized in that: air-blower (2) are equipped with six and are three respectively a set ofly and install in mount pad (1) the left and right sides and be connected through the electric welding, magnetic vibration prevention device (3) are equipped with two altogether and install respectively in transformer main part (4) department of being connected, upper end frame (5) are installed in transformer main part (4) upper surface and are connected through the lock, link (6) are connected through the electric welding with upper end frame (5), controller (7) are installed in upper end frame (5) upper surface and are linked to each other through the electric welding.
2. A magnetic resonance-proof oil filled transformer according to claim 1, characterized by: prevent that magnetism shakes device (3) is including exempting from to be stained with structure (3a), clean structure (3b) of removing, exempt from to be stained with structure (3a) and be three a set ofly and be in same water flat line, exempt from to be stained with structure (3a) and be big range of size, exempt from to be stained with structure (3a) and be even equidistance respectively and install in clean structure (3b) inboard, three exempt from to be stained with structure (3a) that its size of exempting from to be stained with that structure (3a) middle part was equipped with is 0.8 times of exempting from to be stained with structure (3.
3. A magnetic resonance-proof oil filled transformer according to claim 2, characterized in that: exempt from to be stained with structure (3a) and include rotary rod (3a1), connecting rod (3a2), registrate post (3a3), arc (3a4), spacing spring (3a5), connecting rod (3a2) are equipped with three altogether and are even equidistance form respectively and install in rotary rod (3a1) surface and be connected perpendicularly through the electric welding, connecting rod (3a2) end stretches into respectively and registrate post (3a3) inside and be connected through spacing spring (3a5), arc (3a4) are equipped with three altogether and are connected through the electric welding with registrate post (3a3) respectively.
4. A magnetic resonance-proof oil filled transformer according to claim 3, characterized in that: arc (3a4) surface is the cockscomb structure and meshes mutually with net except that structure (3b), arc (3a4) surface cover is equipped with the cloth is wiped to the one deck is coarse, net except that structure (3b) including noise damping net (3b1), net frame (3b2), magnetism disappear mechanism (3b3), install in noise damping net (3b1) upper surface and be connected through the veneer in net frame (3b2), magnetism disappear mechanism (3b3) be three a set install in net frame (3b2) inboard and with exempt from to be stained with structure (3a) corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870321.XA CN110718353A (en) | 2019-09-16 | 2019-09-16 | Magnetic anti-resonance oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870321.XA CN110718353A (en) | 2019-09-16 | 2019-09-16 | Magnetic anti-resonance oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110718353A true CN110718353A (en) | 2020-01-21 |
Family
ID=69210456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910870321.XA Withdrawn CN110718353A (en) | 2019-09-16 | 2019-09-16 | Magnetic anti-resonance oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110718353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112105190A (en) * | 2020-09-11 | 2020-12-18 | 庄培明 | Electrical box for electrical engineering |
-
2019
- 2019-09-16 CN CN201910870321.XA patent/CN110718353A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112105190A (en) * | 2020-09-11 | 2020-12-18 | 庄培明 | Electrical box for electrical engineering |
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Application publication date: 20200121 |
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