CN110932210A - Bus duct and bus duct joint thereof - Google Patents
Bus duct and bus duct joint thereof Download PDFInfo
- Publication number
- CN110932210A CN110932210A CN201910960250.2A CN201910960250A CN110932210A CN 110932210 A CN110932210 A CN 110932210A CN 201910960250 A CN201910960250 A CN 201910960250A CN 110932210 A CN110932210 A CN 110932210A
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- CN
- China
- Prior art keywords
- bus duct
- fixing
- fastening bolt
- sides
- joint
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Classifications
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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
- H02G5/00—Installations of bus-bars
- H02G5/007—Butt joining of bus-bars by means of a common bolt, e.g. splice joint
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
-
- 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
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
-
- 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
- H02G5/00—Installations of bus-bars
- H02G5/10—Cooling
Landscapes
- Installation Of Bus-Bars (AREA)
Abstract
The invention belongs to the technical field of cable installation, and particularly relates to a bus duct and a bus duct joint thereof, aiming at the problems that the bus duct has large resistance at a joint and is easy to generate heat, particularly the temperature of a core-through bolt is easy to increase, and some core-through bolts need to be fastened regularly, the bus duct and the bus duct joint provide the following scheme. According to the invention, the movable plate is moved through the fastening bolt, the insulating sheet is moved until the two sides of the conductive sheets contact the conductive bar, the fastening bolt is continuously twisted, so that the conductive sheets start to bend and are tightly attached to the inclined plane openings of the conductive bar, the contact area is increased, the conductive bar is clamped by the two adjacent conductive sheets, the fastening bolt is positioned on the two sides of the protective sleeve, the temperature of the fastening bolt is not easily increased, and the stability of the fastening bolt is improved.
Description
Technical Field
The invention relates to the technical field of cable installation, in particular to a bus duct and a bus duct joint thereof.
Background
The bus duct is a new circuit connection mode, can provide great power for the disperse system, but the bus duct is great in resistance at the junction, easily generates heat, produces harm, especially the temperature of the bolt that pierces through increases easily, and some bolt that pierces through still need regularly fasten.
Through retrieval, a patent with the Chinese patent application number of CN201720135572.X discloses a heat dissipation structure of a bus duct joint, which comprises a connecting plate group, wherein the connecting plate group comprises a plurality of connecting plates which are arranged in parallel, and an insulating plate is arranged between every two adjacent connecting plates; two sides of the connecting plate group are respectively provided with a heat dissipation plate, and the opposite outer side surfaces of the two heat dissipation plates are respectively provided with a plurality of heat dissipation bulges; the connecting piece is used for connecting and fixing the connecting plate group and the radiating fins; connecting holes are formed in the connecting plate, the insulating plate and the heat dissipation plate, the connecting piece comprises a connecting rod penetrating through the connecting holes and nuts arranged at two ends of the connecting rod, and gaskets are further arranged between the nuts and the heat dissipation fins. The heat radiation structure of a bus duct joint in the above-mentioned patent has following shortcoming: when the device generates heat, the temperature of the connecting rod penetrating through the device is easy to rise, so that nuts at two ends of the connecting rod are heated, and the nuts may need to be fastened regularly after being used for a long time.
Disclosure of Invention
The invention provides a bus duct and a bus duct joint thereof based on the technical problems that the bus duct is high in resistance at a connecting part and easy to generate heat, particularly the temperature of core penetrating bolts is easy to increase, and some core penetrating bolts need to be fastened regularly.
The invention provides a bus duct and a bus duct joint thereof, which comprise two main bodies, wherein the insides of the two main bodies are respectively provided with a conductive bar, the top end and the bottom end of one side of the conductive bar are respectively provided with an inclined plane opening, the outsides of the two main bodies are provided with a protective sleeve, the top end and the bottom end of the protective sleeve are respectively provided with a circular through hole, the protective sleeve is respectively provided with a fastening bolt at the two circular through holes, one end of each fastening bolt is in threaded connection with a movable plate, fixed rods are respectively welded at the two sides of the movable plate, a movable rod is welded between the two fixed rods, the top end of each movable.
Preferably, springs are arranged on the sides, far away from each other, of the two moving plates, and the springs are located outside the fastening bolts.
Preferably, the top of carriage release lever is planar, the bar groove has been seted up to the bottom of insulating piece, the top of carriage release lever is in the inside of bar groove, the top of carriage release lever with the insulating piece bonds.
Preferably, first fixing plates are welded at the top end and the bottom end of the main body, second fixing plates are welded at the top end and the bottom end of the protective sleeve, first through holes are formed in the middle portions of the first fixing plates and the second fixing plates, and fixing bolts are arranged at the first through holes of the first fixing plates and the second fixing plates.
Preferably, limiting plates are welded on two sides of the inner wall of the protecting sleeve, a sealing ring is bonded on one side, away from each other, of the two limiting plates, a trapezoidal groove is formed in one side of the sealing ring, and one end of the main body is located inside the trapezoidal groove.
Preferably, the top and the bottom of main part all weld the stationary blade, and the welding of one side that the stationary blade is close to each other has the fixed block, and the fixed block is the U-shaped, and the fixed block is equipped with insulating pad in U-shaped inslot portion, it is in to lead electrical drainage inside the opening of fixed block.
Preferably, the sealing ring is provided with a water-swelling water stop at the inner wall of one side of the trapezoidal groove.
The beneficial effects of the invention are as follows:
1. through setting up fastening bolt, the movable plate, the dead lever, inclined plane open-ended electrically conducts the row is seted up to carriage release lever and one end, fastening bolt makes the movable plate remove, drive the carriage release lever and remove, make the insulating piece remove, the row is conducted in the both sides contact of up to the conducting strip, continue wrench movement fastening bolt, make the insulating piece continue to remove, the conducting strip begins the bending this moment, and closely laminate with the inclined plane opening of electrically conducting the row, area of contact has been increased, two adjacent conducting strips will lead the electrically conductive row and press from both sides tightly, fastening bolt is in the both sides of lag, make fastening bolt be difficult for rising temperature, fastening bolt's stability has been improved, possess certain distance between the insulating piece simultaneously.
2. Through setting up the spring, after fastening bolt screwed up, the spring can be compressed, provides an axial force for fastening bolt, avoids the movable plate to drop easily.
3. Through setting up the carriage release lever of seting up the bar recess, the bar recess makes carriage release lever and insulating piece difficult separation, can guarantee simultaneously that the movable plate can remove along fastening bolt, rather than following its rotation.
4. Through setting up fixing bolt, first fixed plate and second fixed plate, fixing bolt can make main part and fixed cover fixed, drives simultaneously through the main part and leads the electrical drainage and insert between two conducting strips, makes conducting strip and the inclined plane opening of leading electrical drainage closely laminate.
5. Through setting up the sealing washer of seting up trapezoidal recess and meeting water inflation waterstop, when fixing bolt made main part and fixed cover be close to fixedly, the one end of main part can with the trapezoidal recess in close contact with of sealing washer, make sealing washer and main part contact inseparabler through the limiting plate simultaneously, prevent that the device is inside to intake, inside the trapezoidal recess of sealing washer is infiltrated in to water, meet water inflation waterstop and meet water inflation, make the sealing performance of device promote.
Drawings
Fig. 1 is a schematic cross-sectional structural diagram of a bus duct and a bus duct joint thereof provided in embodiment 1;
fig. 2 is a side sectional view of a bus duct and a bus duct joint thereof provided in embodiment 1;
fig. 3 is a front view of a movable plate structure of a bus duct and a bus duct joint thereof provided in embodiment 1;
fig. 4 is a front view of a housing seal ring structure of a bus duct and a bus duct joint thereof provided in embodiment 2.
In the figure: the water-swelling type water-stopping device comprises a main body 1, a conductive bar 2, a first fixing plate 3, a fixing bolt 4, a second fixing plate 5, a protecting sleeve 6, a sealing ring 7, a limiting block 8, a spring 9, a fastening bolt 10, a moving plate 11, a fixing rod 12, a moving rod 13, a fixing plate 14, a fixing block 15, an insulating pad 16, an insulating sheet 17, a conductive sheet 18, a fixing sheet.
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.
Example 1
Referring to fig. 1-3, a bus duct and a bus duct joint thereof, comprising two main bodies 1, wherein the two main bodies 1 are internally provided with a conductive bar 2, the top end and the bottom end of one side of the conductive bar 2 are provided with inclined plane openings, the two main bodies 1 are externally provided with a protective sleeve 6, the top end and the bottom end of the protective sleeve 6 are provided with circular through holes, the protective sleeve 6 is provided with fastening bolts 10 at the two circular through holes, one end of each fastening bolt 10 is in threaded connection with a movable plate 11, both sides of the movable plate 11 are welded with fixed rods 12, a movable rod 13 is welded between the two fixed rods 12, the top end of the movable rod 13 is provided with an insulating sheet 17, the top end of the insulating sheet 17 is bonded with a conductive sheet 18, during installation, the two fastening bolts 10 are twisted to move the movable plate 11, the two movable plates 11 are away, the movable rod 13 drives the insulating piece 17 and removes, the electrically conductive row 2 of both sides contact of conducting strip 18 on the insulating piece 17, continue to wrench movement fastening bolt 10, make insulating piece 17 continue to remove, conducting strip 18 on the insulating piece 17 begins the bending this moment, and closely laminate with the inclined plane opening of electrically conductive row 2, area of contact has been increased, make two adjacent conducting strips 18 will conduct that row 2 presss from both sides tightly, conducting strip 18 makes two electrically conductive rows 17 switched on, fastening bolt 10 is located the both sides of lag 6, make fastening bolt 10 be difficult for rising the temperature, fastening bolt 10's stability has been improved, possess certain distance between the insulating piece 17 simultaneously, can strengthen the heat dissipation.
According to the invention, the springs 9 are arranged on the sides, away from each other, of the two moving plates 11, the springs 9 are positioned outside the fastening bolts 10, and after the fastening bolts 10 are screwed down, the springs 9 are compressed to provide an axial force for the fastening bolts 10, so that the moving plates 11 are prevented from falling off easily.
Wherein, the top of carriage release lever 13 is planar, and the bar groove has been seted up to the bottom of insulating piece 17, and the top of carriage release lever 13 is in the inside of bar groove, and the top of carriage release lever 13 bonds with insulating piece 17, and the bar groove makes carriage release lever 13 and insulating piece 17 difficult separation, can guarantee simultaneously that movable plate 11 can remove along fastening bolt 10, rather than following its rotation.
Wherein, first fixed plate 3 has all been welded on the top of main part 1 and bottom, second fixed plate 5 has all been welded on the top and the bottom of lag 6, first through-hole has all been seted up at the middle part of first fixed plate 3 and second fixed plate 5, first fixed plate 3 and second fixed plate 5 are equipped with fixing bolt 4 in first through-hole department, can make main part 1 fixed with fixed cover 6 through fixing bolt 4, it inserts between two conducting strips 18 to drive electrically conductive row 2 through main part 1 simultaneously, make conducting strip 18 closely laminate with the inclined plane opening of electrically conductive row 2.
Wherein, limiting plate 8 has all been welded to the both sides of lag 6 inner wall, and the sealing washer 7 has all been bonded to one side that two limiting plates 8 kept away from each other, and trapezoidal recess has been seted up to one side of sealing washer 7, and the one end of main part 1 is in the inside of trapezoidal recess, and when fixing bolt 4 made main part 1 and fixed cover 6 be close to fixedly, the one end of main part 1 can with the trapezoidal recess in close contact with of sealing washer 7, makes sealing washer 7 inseparabler with the contact of main part 1 through limiting plate 8 simultaneously, prevents to install inside intaking.
Wherein, the top and the bottom of main part 1 all weld have a stationary blade 14, and the welding of one side that stationary blade 14 is close to each other has a fixed block 15, and fixed block 15 is the U-shaped, and fixed block 15 is equipped with insulating pad 16 in the U-shaped inslot portion, and electrically conductive row 2 is in inside the opening of fixed block 15.
When the device is installed, the two fastening bolts 10 are twisted, the fastening bolts 10 move the movable plates 11, the two movable plates 11 are far away from each other, the spring 9 is compressed to provide an axial force for the fastening bolts 10, the movable plates 11 are prevented from easily falling off, the two movable plates 11 drive the movable rod 13 on the fixed rod 12 to move, the movable rod 13 drives the insulating sheet 17 to move until the two sides of the conducting sheet 18 on the insulating sheet 17 contact the conducting bars 2, the fastening bolts 10 are continuously twisted to enable the insulating sheet 17 to continuously move, at the moment, the conducting sheet 18 on the insulating sheet 17 begins to bend and is tightly attached to the inclined plane openings of the conducting bars 2, the contact area is increased, the conducting bars 2 are clamped by the two adjacent conducting sheets 18, the conducting sheets 18 enable the two conducting bars 17 to be connected, the fastening bolts 10 are positioned on the two sides of the protective sleeve 6, the fastening bolts 10 are not easy, meanwhile, a certain distance is reserved between the insulating sheets 17, so that heat dissipation can be enhanced;
the main body 1 and the fixing sleeve 6 can be fixed through the fixing bolt 4, and the main body 1 drives the conductive bar 2 to be inserted between the two conductive sheets 18, so that the conductive sheets 18 are tightly attached to the inclined plane openings of the conductive bar 2;
when fixing bolt 4 made main part 1 and fixed cover 6 be close to fixedly, the one end of main part 1 can be with the trapezoidal recess in close contact with of sealing washer 7, and it is inseparabler to make sealing washer 7 and main part 1 contact through limiting plate 8 simultaneously, prevents to install inside intaking.
Example 2
Referring to fig. 4, a bus duct and bus duct joint thereof, this embodiment compares in embodiment 1, and in order to increase the waterproof performance of device, sealing washer 7 is equipped with water-swelling waterstop 20 in one side inner wall department of trapezoidal recess, and inside water seeped into the trapezoidal recess of sealing washer 7, water-swelling waterstop 20 met water-swelling, made the sealing performance of device promote.
When the device is installed, the two fastening bolts 10 are twisted, the fastening bolts 10 move the movable plates 11, the two movable plates 11 are far away from each other, the spring 9 is compressed to provide an axial force for the fastening bolts 10, the movable plates 11 are prevented from easily falling off, the two movable plates 11 drive the movable rod 13 on the fixed rod 12 to move, the movable rod 13 drives the insulating sheet 17 to move until the two sides of the conducting sheet 18 on the insulating sheet 17 contact the conducting bars 2, the fastening bolts 10 are continuously twisted to enable the insulating sheet 17 to continuously move, at the moment, the conducting sheet 18 on the insulating sheet 17 begins to bend and is tightly attached to the inclined plane openings of the conducting bars 2, the contact area is increased, the conducting bars 2 are clamped by the two adjacent conducting sheets 18, the conducting sheets 18 enable the two conducting bars 17 to be connected, the fastening bolts 10 are positioned on the two sides of the protective sleeve 6, the fastening bolts 10 are not easy, meanwhile, a certain distance is reserved between the insulating sheets 17, so that heat dissipation can be enhanced;
the main body 1 and the fixing sleeve 6 can be fixed through the fixing bolt 4, and the main body 1 drives the conductive bar 2 to be inserted between the two conductive sheets 18, so that the conductive sheets 18 are tightly attached to the inclined plane openings of the conductive bar 2;
when fixing bolt 4 made main part 1 and fixed cover 6 be close to fixedly, the one end of main part 1 can make sealing washer 7 inseparabler with the trapezoidal recess in close contact with of sealing washer 7 through limiting plate 8 simultaneously, and the prevention device is inside to intake, and inside as the trapezoidal recess of water infiltration sealing washer 7, water-swelling waterstop 20 water-swelling was met, made the sealing performance of device promote.
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. The utility model provides a bus duct and bus duct joint thereof, includes two main parts (1), its characterized in that, two the inside of main part (1) all is equipped with electrically conductive row (2), and the inclined plane opening has all been seted up to the top and the bottom of electrically conductive row (2) one side, two the outside of main part (1) is equipped with lag (6), and circular through-hole has all been seted up to the top and the bottom of lag (6), lag (6) all are equipped with fastening bolt (10) in two circular through-hole departments, and the one end of fastening bolt (10) is equipped with movable plate (11), and the both sides of movable plate (11) all are equipped with dead lever (12), are equipped with between two dead levers (12) movable rod (13), and the top of movable rod (13) is equipped with insulating piece (17), and the top of insulating piece (.
2. The bus duct and the bus duct joint thereof according to claim 1, wherein springs (9) are arranged on the sides of the two moving plates (11) far away from each other, and the springs (9) are arranged outside the fastening bolts (10).
3. The bus duct and the bus duct joint thereof according to claim 1, wherein the top end of the moving rod (13) is planar, the bottom end of the insulation sheet (17) is provided with a strip-shaped groove, the top end of the moving rod (13) is positioned in the strip-shaped groove, and the top end of the moving rod (13) is fixedly connected with the insulation sheet (17).
4. The bus duct and the bus duct joint thereof according to claim 1, wherein a first fixing plate (3) is arranged at the top end and the bottom end of the main body (1), a second fixing plate (5) is arranged at the top end and the bottom end of the protective sleeve (6), a first through hole is formed in the middle of each of the first fixing plate (3) and the second fixing plate (5), and a fixing bolt (4) is arranged at the first through hole of each of the first fixing plate (3) and the second fixing plate (5).
5. The bus duct and the bus duct joint thereof according to claim 1, wherein two sides of the inner wall of the protective sleeve (6) are respectively provided with a limiting plate (8), one sides of the two limiting plates (8) far away from each other are respectively provided with a sealing ring (7), one side of each sealing ring (7) is provided with a trapezoidal groove, and one end of the main body (1) is positioned inside the trapezoidal groove.
6. The bus duct and the bus duct joint thereof as claimed in any one of claims 1 to 5, wherein fixing pieces (14) are arranged at the top end and the bottom end of the main body (1), a fixing block (15) is arranged at one side of the fixing pieces (14) close to each other, the fixing block (15) is U-shaped, an insulating pad (16) is arranged inside the U-shaped groove of the fixing block (15), and the conductive bar (2) is arranged inside an opening of the fixing block (15).
7. The bus duct and the bus duct joint thereof according to claim 5, wherein the sealing ring (7) is provided with a water-swelling water stop (20) at the inner wall of one side of the trapezoidal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910960250.2A CN110932210A (en) | 2019-10-10 | 2019-10-10 | Bus duct and bus duct joint thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910960250.2A CN110932210A (en) | 2019-10-10 | 2019-10-10 | Bus duct and bus duct joint thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110932210A true CN110932210A (en) | 2020-03-27 |
Family
ID=69848789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910960250.2A Pending CN110932210A (en) | 2019-10-10 | 2019-10-10 | Bus duct and bus duct joint thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110932210A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969527A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Novel intelligent bus duct |
| CN111969526A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Mineral fire-resistant bus duct |
| CN111969525A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Bus duct special for data center |
| CN111969528A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Intelligent bus duct and jack box |
| CN112018694A (en) * | 2020-08-31 | 2020-12-01 | 曾繁强 | Bus duct with temperature rise monitoring system |
| CN112881920A (en) * | 2021-04-12 | 2021-06-01 | 国网山东省电力公司莱芜供电公司 | Energy management device special for return transportation lead-acid storage battery of energy storage power station |
| CN112928633A (en) * | 2021-03-18 | 2021-06-08 | 安徽长龙电气集团有限公司 | Novel distribution cabinet |
| CN114243607A (en) * | 2022-02-25 | 2022-03-25 | 徐州拓发电力器材有限公司 | Adjustable bus duct |
| CN117977256A (en) * | 2024-03-28 | 2024-05-03 | 山东泰开电力开关有限公司 | Bus butt joint device |
-
2019
- 2019-10-10 CN CN201910960250.2A patent/CN110932210A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018694B (en) * | 2020-08-31 | 2021-09-07 | 曾繁强 | Bus duct with temperature rise monitoring system |
| CN111969528B (en) * | 2020-08-31 | 2021-11-09 | 曾繁强 | Jack box of intelligence bus duct |
| CN111969525A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Bus duct special for data center |
| CN111969528A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Intelligent bus duct and jack box |
| CN111969527A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Novel intelligent bus duct |
| CN111969526B (en) * | 2020-08-31 | 2021-09-07 | 曾繁强 | Mineral fire-resistant bus duct |
| CN111969526A (en) * | 2020-08-31 | 2020-11-20 | 曾繁强 | Mineral fire-resistant bus duct |
| CN111969525B (en) * | 2020-08-31 | 2021-11-09 | 曾繁强 | Bus duct special for data center |
| CN112018694A (en) * | 2020-08-31 | 2020-12-01 | 曾繁强 | Bus duct with temperature rise monitoring system |
| CN112928633A (en) * | 2021-03-18 | 2021-06-08 | 安徽长龙电气集团有限公司 | Novel distribution cabinet |
| CN112928633B (en) * | 2021-03-18 | 2022-10-21 | 安徽长龙电气集团有限公司 | Power distribution cabinet |
| CN112881920A (en) * | 2021-04-12 | 2021-06-01 | 国网山东省电力公司莱芜供电公司 | Energy management device special for return transportation lead-acid storage battery of energy storage power station |
| CN112881920B (en) * | 2021-04-12 | 2022-07-26 | 国网山东省电力公司莱芜供电公司 | Energy management device special for return transportation lead-acid storage battery of energy storage power station |
| CN114243607A (en) * | 2022-02-25 | 2022-03-25 | 徐州拓发电力器材有限公司 | Adjustable bus duct |
| CN117977256A (en) * | 2024-03-28 | 2024-05-03 | 山东泰开电力开关有限公司 | Bus butt joint device |
| CN117977256B (en) * | 2024-03-28 | 2024-06-25 | 山东泰开电力开关有限公司 | Bus butt joint device |
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Application publication date: 20200327 |