CN117080968A

CN117080968A - Bus duct power transmission device and multi-layer bus duct electric connection method

Info

Publication number: CN117080968A
Application number: CN202311092535.1A
Authority: CN
Inventors: 胡国雄
Original assignee: Guangdong Shifu Electric Industrial Co ltd
Current assignee: Guangdong Shifu Electric Industrial Co ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2023-11-17
Anticipated expiration: 2043-08-28
Also published as: CN117080968B

Abstract

The application relates to the field of bus ducts, in particular to a bus duct power transmission device and a multilayer bus duct power connection method. The multilayer bus duct electric connection method comprises the following steps: s1, firstly placing the bus duct body between the first protective shell and the second protective shell, and then rotating the operating rod according to the length of the bus duct body, so that the telescopic ring stretches out of the telescopic groove. The application solves the problem of poor connection stability of the first protective shell and the second protective shell.

Description

Bus duct power transmission device and multi-layer bus duct electric connection method

Technical Field

The application relates to the field of bus ducts, in particular to a bus duct power transmission device and a multilayer bus duct electric connection method.

Background

At present, with the rapid development of cities, high-rise buildings are more and more, building electricity loads are rapidly increased along with the rapid increase of the buildings, original electric wires and cables are gradually replaced by bus ducts with large capacity, convenient branching, convenient bundling management and the like due to small capacity, inconvenient branching, inconvenient bundling management and the like, and a plurality of groups of bus ducts are needed for connection and use, and the types of connection of the bus ducts are more and more, so that the bus duct power transmission devices can be quickly connected during site construction.

The related art can refer to chinese application with publication number CN115513875a, which discloses a bus duct power transmission device, including first protective housing and second protective housing, first protective housing and second protective housing inner chamber block are equipped with bus duct body, and be equipped with ripple seal cover between first protective housing and the second protective housing, the opposite side of the lateral wall of first protective housing and second protective housing is fixed and is provided with the engaging lug, through fastening bolt fixed connection between the engaging lug, the equal fixed mounting in top and the bottom of bus duct body has the insulation board, fixed mounting has dampproofing pad on the lateral wall of one side that the bus duct body was kept away from to the insulation board, fixed mounting is equipped with the limiting plate on the lateral wall of one side that the dampproofing pad kept away from the insulation board, the top fixed mounting of upside limiting plate has the last electrical connection sleeve that extends first protective housing, the bottom fixed mounting of downside limiting plate is equipped with the lower electrical connection sleeve that extends the second protective housing, and go up electrical connection sleeve and lower electrical connection sleeve grafting assembly, and the top and the bottom of bus duct body all are fixed and be provided with the electrical connection post, and two sets of electrical connection posts all pass in proper order behind the insulation board and the limiting plate and the upper electrical connection sleeve and lower electrical connection.

To the above-mentioned related art, only fix first protective housing and second protective housing through the bolt, the bolt appears becoming flexible easily after long-time use, leads to first protective housing and second protective housing to be connected stability relatively poor.

Disclosure of Invention

In order to solve the problem of poor connection stability of the first protective shell and the second protective shell, the application provides a bus duct power transmission device and a multilayer bus duct power connection method.

In a first aspect, the present application provides a bus duct power transmission device, which adopts the following technical scheme:

the bus duct power transmission device comprises a first protective shell and a second protective shell, wherein a telescopic ring is arranged on the end face, facing the second protective shell, of the first protective shell, the center of the telescopic ring coincides with the center of the first protective shell, a mounting block is fixedly connected on the end face, facing the first protective shell, of the second protective shell, a mounting groove for the mounting block to be inserted is formed in the side wall, facing the second protective shell, of the telescopic ring, and a locking part for locking the mounting block is arranged on the telescopic ring;

the mounting groove is characterized in that a placing groove is formed in the side wall of the mounting groove, the locking part comprises a locking block which is installed in the placing groove in a sliding mode, a locking groove for the locking block to be inserted is formed in the side wall of the mounting block, an insert used for driving the locking block to move towards one side close to the mounting block is arranged in the placing groove, and a pulling-out piece used for driving the locking block to move towards one side far away from the mounting block is arranged in the placing groove.

Through adopting above-mentioned technical scheme, when needs are connected first protective housing and second protective housing, insert the installation piece at first in the mounting groove, extract piece drive locking piece this moment and move towards one side of keeping away from the installation piece, after the installation piece inserts the mounting groove, insert piece drive locking piece moves towards one side that is close to the installation piece for the locking piece inserts in the locking groove, and the locking piece locks the installation piece, has accomplished the connection to first protective housing and second protective housing, has improved the relatively poor problem of stability that first protective housing and second protective housing are connected.

Preferably, the insert comprises a fixed block arranged on the inner wall of the placing groove, a fixed hole is formed in the side wall of the locking block, the fixed block is arranged in the fixed hole in a penetrating mode and can slide along the fixed hole, an insertion spring is fixedly connected to the side wall of the fixed block, and one end, far away from the fixed block, of the insertion spring is fixedly connected with the inner wall of the fixed hole.

Through adopting above-mentioned technical scheme, in the in-process that the installation piece inserted the mounting groove, insert the spring and be compressed form, after the installation piece inserts the mounting groove, insert the spring and promote the locking piece and remove for the locking piece inserts in the locking groove, thereby has accomplished the connection to first protective housing and second protective housing, the staff of being convenient for operates.

Preferably, the pulling-out piece comprises a pulling-out block fixedly connected to the side wall of the locking block on one side facing the installation block, a pulling-out inclined surface is formed on the end surface of the pulling-out block far away from the locking block, and the distance from one side close to the installation block to one side far away from the installation block to the second protective shell is gradually reduced.

Through adopting above-mentioned technical scheme, at the in-process that the installation piece inserted the mounting groove, the installation piece at first with extract the inclined plane contact, then the installation piece promotes and extracts the piece and remove, extracts the piece and drives the locking piece and move towards the one side of keeping away from the installation piece, inserts the spring simultaneously and is compressed form, has reduced staff's operation step.

Preferably, a rotating shaft rotationally connected with the fixed block is arranged in the fixed block in a penetrating way, the rotating shaft is fixedly connected on the inner wall of the placing groove, and a limiting part for limiting the locking block is arranged on the telescopic ring.

Through adopting above-mentioned technical scheme, when needs dismantle first protective housing and second protective housing, only need remove spacing part and remove the second protective housing to the spacing of locking piece, the second protective housing drives the installation piece and removes, and the installation piece drives the locking piece and rotates, when the locking piece breaks away from in the locking groove, can dismantle first protective housing and second protective housing, the staff of being convenient for operates.

Preferably, the limiting component comprises an operating rod penetrating through the inner wall of the placing groove and a limiting block arranged on the operating rod, the operating rod extends to the outer side of the telescopic ring, and the side wall of the limiting block is in butt joint with the side wall of the locking block.

Through adopting above-mentioned technical scheme, remove the action bars, the action bars drives the stopper and removes, and when stopper and locking piece separation, the locking piece can rotate, and the staff of being convenient for operates.

Preferably, the expansion groove for placing the expansion ring is formed in the end face of the first protective shell, the side wall of the expansion ring is attached to the inner wall of the expansion groove, the expansion ring can move in the expansion groove and extends to the outer side of the expansion groove, and the expansion part for driving the expansion ring to move is arranged in the expansion ring.

Through adopting above-mentioned technical scheme, start telescopic part, telescopic part drives the expansion collar and removes for the expansion collar stretches out from the expansion tank, can adjust the interval between first protective housing and the second protective housing according to the length of bus duct body, and the expansion collar can seal the clearance between first protective housing and the second protective housing, has increased the application range of first protective housing and second protective housing.

Preferably, the telescopic component comprises a screw rod rotatably installed on the end face of the telescopic ring, the screw rod penetrates through the inner bottom face of the telescopic groove and is in threaded connection with the first protective shell, and the screw rod extends into the installation groove; the operation rod is fixedly connected with a first bevel gear, the screw is fixedly connected with a second bevel gear meshed with the first bevel gear, the operation rod is rotationally connected with the limiting block, and the limiting block is slidably mounted on the inner wall of the placing groove.

Through adopting above-mentioned technical scheme, rotate the action bars, the action bars drive first bevel gear and rotate, and first bevel gear drives second bevel gear and rotates, and second bevel gear drives the screw rod and rotates, and the screw rod drives the expansion collar and removes for the expansion collar stretches out from the expansion tank, and the staff of being convenient for operates.

Preferably, the mounting block is provided with a positioning part for limiting the screw, the side wall of the mounting block is provided with a first transmission groove, the inner wall of the first transmission groove is provided with a second transmission groove communicated with the locking groove, and the positioning part comprises a positioning block placed in the first transmission groove and a transmission block placed in the second transmission groove; the end face of the screw is provided with a positioning groove for the insertion of the positioning block, one end of the transmission block is in contact with the locking block, the other end of the transmission block is provided with a transmission inclined plane in a molding mode, and the transmission inclined plane is in contact with the side edge of the positioning block.

Through adopting above-mentioned technical scheme, at the in-process that the locking piece inserted the locking groove, the locking piece promoted the transmission piece and removes, and the transmission piece promotes the locating piece through the transmission inclined plane and removes for the locating piece inserts in the constant head tank, and the locating piece is spacing to the screw rod, has reduced the mistake and has touched the emergence that the action bars moved the expansion ring.

Preferably, the sealing ring is fixedly connected to the end face of the second protective shell, which faces the first protective shell.

By adopting the technical scheme, the tightness between the second protective housing and the telescopic ring is improved.

In a second aspect, the present application provides a multi-layer bus duct electrical connection method, which adopts the following technical scheme.

The multilayer bus duct electric connection method comprises the following steps:

s1, firstly, placing a bus duct body between a first protective shell and a second protective shell, and then rotating an operating rod according to the length of the bus duct body to enable a telescopic ring to extend out of a telescopic groove;

s2, when the telescopic ring stretches out to a preset position, the second protective shell moves towards one side close to the first protective shell, so that the locking block locks the mounting block, and meanwhile, the positioning block positions the screw rod, so that the mounting between the first protective shell and the second protective shell is completed;

and S3, when the plurality of groups of bus duct bodies are used for electric connection, the upper electric connecting sleeve and the lower electric connecting sleeve on the other group of bus duct power transmission devices are assembled in a plugging mode, and signals are transmitted through the contact pins and the electric connecting optical fibers.

Through adopting above-mentioned technical scheme, use locking piece and installation piece to be connected first protective housing and second protective housing, the staff of being convenient for operates to the relatively poor problem of stability of first protective housing and second protective housing connection has been improved.

In summary, the application has at least the following beneficial technical effects:

1. according to the application, the locking block, the inserting piece and the extracting piece are arranged, when the first protective shell and the second protective shell are required to be connected, the mounting block is firstly inserted into the mounting groove, the extracting piece drives the locking block to move towards one side far away from the mounting block, after the mounting block is inserted into the mounting groove, the inserting piece drives the locking block to move towards one side close to the mounting block, so that the locking block is inserted into the locking groove, the locking block locks the mounting block, the connection of the first protective shell and the second protective shell is completed, and the problem of poor connection stability of the first protective shell and the second protective shell is solved;

2. according to the application, the fixed block and the insertion spring are arranged, the insertion spring is compressed in the process of inserting the installation block into the installation groove, and after the installation block is inserted into the installation groove, the insertion spring pushes the locking block to move, so that the locking block is inserted into the locking groove, the connection of the first protective shell and the second protective shell is completed, and the operation of workers is facilitated;

3. according to the application, the pull-out block is arranged, the installation block is firstly contacted with the pull-out inclined surface in the process of inserting the installation block into the installation groove, then the installation block pushes the pull-out block to move, the pull-out block drives the locking block to move towards one side far away from the installation block, and meanwhile, the insertion spring is compressed, so that the operation steps of workers are reduced.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a bus duct power transmission device according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional structure of a first protective case and a second protective case according to an embodiment of the application.

Fig. 3 is a schematic structural view of a telescopic member according to an embodiment of the present application.

Fig. 4 is a schematic structural view of a locking member according to an embodiment of the present application.

Fig. 5 is a schematic structural view of an insert according to an embodiment of the present application.

Reference numerals illustrate: 1. a first protective case; 11. a telescopic slot; 2. a second protective case; 21. a mounting block; 211. a locking groove; 212. a first transmission groove; 213. a second transmission groove; 22. a seal ring; 3. a telescopic ring; 31. a mounting groove; 32. a placement groove; 4. a locking member; 41. a locking block; 411. a fixing hole; 42. an insert; 421. a fixed block; 422. inserting a spring; 423. a rotating shaft; 43. pulling out the piece; 431. pulling out the block; 4311. pulling out the inclined plane; 5. a limiting member; 51. an operation lever; 511. a first bevel gear; 52. a limiting block; 6. a telescopic member; 61. a screw; 611. a second bevel gear; 612. a positioning groove; 7. a positioning member; 71. a positioning block; 72. a transmission block; 721. and a transmission inclined plane.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses a bus duct power transmission device and a multilayer bus duct power connection method. Referring to fig. 1 and 2, the bus duct power transmission device comprises a first protective shell 1, a second protective shell 2, a telescopic ring 3 and a locking component 4, wherein a telescopic groove 11 is formed in the end face of the first protective shell 1 facing the second protective shell 2, the telescopic groove 11 is a circular groove, and the center of the telescopic groove 11 is overlapped with the center of the first protective shell 1; the telescopic ring 3 is placed in the telescopic groove 11, the shape of the telescopic ring 3 is the same as that of the telescopic groove 11, the telescopic part 6 is installed in the telescopic ring 3, and the telescopic part 6 can drive the telescopic ring 3 to move in the telescopic groove 11 so as to extend out of the telescopic groove 11, and the length of the first protective shell 1 is increased so as to adapt to bus duct bodies with different sizes; the locking part 4 is installed on the expansion ring 3, and the locking part 4 can be connected with the expansion ring 3 and the second protective housing 2, so that the first protective housing 1 and the second protective housing 2 are connected, and the problem that the stability of the connection of the first protective housing 1 and the second protective housing 2 is poor is solved.

Referring to fig. 3 and 4, the end surface of the second protective housing 2 facing the first protective housing 1 is fixedly connected with a mounting block 21, the end surface of the telescopic ring 3 facing the second protective housing 2 is provided with a mounting groove 31, the mounting block 21 is inserted into the mounting groove 31, four side walls of the mounting block 21 are attached to four inner walls of the mounting groove 31, and the locking component 4 can lock the mounting block 21, so that the telescopic ring 3 is connected with the second protective housing 2; the second protective housing 2 is fixedly connected with sealing ring 22 on towards the terminal surface of first protective housing 1, and sealing ring 22 is the shape of returning, and sealing ring 22 and the terminal surface contact of expansion ring 3 have improved the leakproofness between second protective housing 2 and the expansion ring 3.

Referring to fig. 4 and 5, a receiving groove 32 is formed in a sidewall of the mounting groove 31, and the locking member 4 includes an insert 42, a locking block 41, and a withdrawal piece 43; the insert 42 includes a rotation shaft 423, a fixed block 421, and an insertion spring 422, where the rotation shaft 423 is fixedly connected to the inner wall of the placement groove 32 and is horizontally disposed, the fixed block 421 is sleeved on the rotation shaft 423 and is rotationally connected to the rotation shaft 423, and the insertion spring 422 is fixedly connected to the side wall of the fixed block 421 and is horizontally disposed; the locking block 41 is horizontally placed in the placing groove 32, a fixing hole 411 is horizontally formed in the side wall of the locking block 41, the fixing block 421 is arranged in the fixing hole 411 in a penetrating mode and can slide along the fixing hole 411, one end, away from the fixing block 421, of the insertion spring 422 is fixedly connected with the inner wall of the fixing hole 411, a locking groove 211 is formed in the side wall of the mounting block 21, and the locking block 41 can be inserted into the locking groove 211; the extracting member 43 comprises an extracting block 431, the extracting block 431 is fixedly connected to the side wall of the locking block 41, which faces the mounting block 21, an extracting inclined surface 4311 is formed on the end surface of the extracting block 431, which is far away from the locking block 41, and the distance from the extracting inclined surface 4311 to the mounting block 21 from top to bottom is gradually reduced; during the process of inserting the mounting block 21 into the mounting groove 31, the mounting block 21 is firstly contacted with the pull-out inclined surface 4311, then the mounting block 21 pushes the pull-out block 431 to move, the pull-out block 431 drives the locking block 41 to move towards the side far away from the mounting block 21, meanwhile, the inserting spring 422 is compressed, and when the locking block 41 is opposite to the locking groove 211, the inserting spring 422 pushes the locking block 41 to move, so that the locking block 41 is inserted into the locking groove 211, and the mounting block 21 is locked.

Referring to fig. 4, a limiting member 5 is mounted on the expansion ring 3, and the limiting member 5 includes an operation rod 51 and a limiting block 52; the operation rod 51 horizontally penetrates through the inner wall of the placement groove 32 and extends to the outer side of the telescopic ring 3, and the operation rod 51 can rotate and move; the limiting block 52 is sleeved on the operating rod 51 and is rotationally connected with the operating rod 51, the limiting block 52 is slidably mounted on the inner wall of the placing groove 32, and the top of the limiting block 52 is abutted with the bottom of the locking block 41; when the first protective shell 1 and the second protective shell 2 need to be disassembled, the operation rod 51 is only required to be moved, the operation rod 51 drives the limiting block 52 to move, when the limiting block 52 is separated from the locking block 41, the second protective shell 2 moves, the second protective shell 2 drives the mounting block 21 to move, the mounting block 21 drives the locking block 41 to rotate, and when the locking block 41 is separated from the locking groove 211, the first protective shell 1 and the second protective shell 2 can be disassembled.

Referring to fig. 3 and 4, the telescopic member 6 includes a screw 61 rotatably installed at the bottom of the telescopic ring 3 in a vertical arrangement, the bottom of the screw 61 penetrating through the inner bottom surface of the telescopic groove 11 and being screw-coupled with the first protective case 1, and the top of the screw 61 extending into the installation groove 31; the operating rod 51 is sleeved with a first conical gear 511 fixedly connected with the operating rod 51, the screw 61 is sleeved with a second conical gear 611 fixedly connected with the screw 61, and the second conical gear 611 is meshed with the first conical gear 511; the operation rod 51 is rotated, the operation rod 51 drives the first conical gear 511 to rotate, the first conical gear 511 drives the second conical gear 611 to rotate, the second conical gear 611 drives the screw 61 to rotate, and the screw 61 drives the telescopic ring 3 to move, so that the telescopic ring 3 extends out of the telescopic groove 11.

Referring to fig. 4, a positioning part 7 is mounted on the mounting block 21, a first transmission groove 212 is vertically formed at the bottom of the mounting block 21, a second transmission groove 213 which is communicated with the locking groove 211 is horizontally formed on the inner wall of the first transmission groove 212, and the positioning part 7 comprises a positioning block 71 and a transmission block 72; the positioning block 71 is vertically arranged in the first transmission groove 212 and extends to the outer side of the first transmission groove 212, the top of the screw 61 is provided with the positioning groove 612, the positioning block 71 can be inserted into the positioning groove 612, the positioning block 71 limits the screw 61, and the situation that the error touch operation rod 51 moves the telescopic ring 3 is reduced; the transmission block 72 is horizontally placed in the second transmission groove 213, one end of the transmission block 72 is in contact with the locking block 41, a transmission inclined plane 721 is formed at the other end of the transmission block 72, the transmission inclined plane 721 is in contact with the side edge of the top of the positioning block 71, in the process that the locking block 41 is inserted into the locking groove 211, the locking block 41 pushes the transmission block 72 to move, and the transmission block 72 pushes the positioning block 71 to move through the transmission inclined plane 721, so that the positioning block 71 is inserted into the positioning groove 612.

The bus duct power transmission device of the embodiment of the application has the implementation principle that: when the first protective shell 1 and the second protective shell 2 need to be connected, the operating rod 51 is rotated at first, the operating rod 51 drives the first conical gear 511 to rotate, the first conical gear 511 drives the second conical gear 611 to rotate, the second conical gear 611 drives the screw 61 to rotate, the screw 61 drives the telescopic ring 3 to move, so that the telescopic ring 3 stretches out of the telescopic groove 11, the distance between the first protective shell 1 and the second protective shell 2 can be adjusted according to the length of the bus duct body, the telescopic ring 3 can seal the gap between the first protective shell 1 and the second protective shell 2, and the application range of the first protective shell 1 and the second protective shell 2 is enlarged; then the installation block 21 is inserted into the installation groove 31, when the installation block 21 is in contact with the pull-out inclined surface 4311, the installation block 21 pushes the pull-out block 431 to move, the pull-out block 431 drives the locking block 41 to move towards one side far away from the installation block 21, at the moment, the insertion spring 422 is compressed, when the locking block 41 is opposite to the locking groove 211, the insertion spring 422 pushes the locking block 41 to move, so that the locking block 41 is inserted into the locking groove 211, the locking block 41 locks the installation block 21, so that the telescopic ring 3 is connected with the second protection shell 2, the first protection shell 1 is connected with the second protection shell 2, and the problem of poor stability of connection between the first protection shell 1 and the second protection shell 2 is solved; and in the process of inserting the locking block 41 into the locking groove 211, the locking block 41 pushes the transmission block 72 to move, and the transmission block 72 pushes the positioning block 71 to move through the transmission inclined plane 721, so that the positioning block 71 is inserted into the positioning groove 612, the positioning block 71 limits the screw 61, and the situation that the error touch operation rod 51 moves the telescopic ring 3 is reduced.

When the first protective housing 1 and the second protective housing 2 need to be disassembled, the operation rod 51 only needs to be moved, the operation rod 51 drives the limiting block 52 to move, when the limiting block 52 is separated from the locking block 41, the second protective housing 2 moves, the second protective housing 2 drives the mounting block 21 to move, the mounting block 21 drives the locking block 41 to rotate, and when the locking block 41 is separated from the locking groove 211, the first protective housing 1 and the second protective housing 2 can be disassembled, so that the operation of workers is facilitated.

s1, firstly, placing the bus duct body between the first protective shell 1 and the second protective shell 2, and then rotating the operation rod 51 according to the length of the bus duct body, so that the expansion ring 3 extends out of the expansion groove 11.

S2, when the telescopic ring 3 stretches out to a preset position, the second protective housing 2 moves towards one side close to the first protective housing 1, the locking block 41 locks the mounting block 21, and meanwhile the positioning block 71 positions the screw 61, so that the mounting between the first protective housing 1 and the second protective housing 2 is completed, the operation by workers is facilitated, and the problem of poor stability of connection between the first protective housing 1 and the second protective housing 2 is solved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. Bus duct transmission of electricity device, including first protective housing (1) and second protective housing (2), its characterized in that: the telescopic ring (3) is arranged on the end face, facing the second protective shell (2), of the first protective shell (1), the center of the telescopic ring (3) coincides with the center of the first protective shell (1), the end face, facing the first protective shell (1), of the second protective shell (2) is fixedly connected with a mounting block (21), a mounting groove (31) for the mounting block (21) to be inserted is formed in the side wall, facing the second protective shell (2), of the telescopic ring (3), and a locking part (4) for locking the mounting block (21) is arranged on the telescopic ring (3);

the utility model discloses a locking device for the automobile, including installation groove (31), standing groove (32) have been seted up on the lateral wall of installation groove (31), locking part (4) including slidable mounting locking piece (41) in standing groove (32), offer on the lateral wall of installation piece (21) and supply locking piece (41) male locking groove (211), be provided with in standing groove (32) and be used for driving locking piece (41) towards insert (42) that are close to installation piece (21) one side and remove, be provided with in standing groove (32) and be used for driving locking piece (41) towards pull out piece (43) that are kept away from installation piece (21) one side and remove.

2. The busway power transmission apparatus of claim 1, wherein: the insert (42) comprises a fixed block (421) arranged on the inner wall of the placing groove (32), a fixed hole (411) is formed in the side wall of the locking block (41), the fixed block (421) is arranged in the fixed hole (411) in a penetrating mode and can slide along the fixed hole (411), an insert spring (422) is fixedly connected to the side wall of the fixed block (421), and one end, far away from the fixed block (421), of the insert spring (422) is fixedly connected with the inner wall of the fixed hole (411).

3. The busway power transmission apparatus of claim 1, wherein: the pull-out piece (43) comprises a pull-out block (431) fixedly connected to the side wall of the locking block (41) on one side towards the mounting block (21), a pull-out inclined surface (4311) is formed on the end face, far away from the locking block (41), of the pull-out block (431), and the distance from one side, close to the mounting block (21), to one side, far away from the mounting block (21), of the pull-out inclined surface (4311) is gradually reduced from the distance from the second protective shell (2).

4. The busway power transmission apparatus of claim 2, wherein: the fixed block (421) is internally penetrated with a rotating shaft (423) which is rotationally connected with the fixed block (421), the rotating shaft (423) is fixedly connected on the inner wall of the placing groove (32), and the telescopic ring (3) is provided with a limiting component (5) for limiting the locking block (41).

5. The busway power transmission apparatus of claim 4, wherein: the limiting component (5) comprises an operating rod (51) penetrating through the inner wall of the placing groove (32) and a limiting block (52) arranged on the operating rod (51), the operating rod (51) extends to the outer side of the telescopic ring (3), and the side wall of the limiting block (52) is in butt joint with the side wall of the locking block (41).

6. The busway power transmission apparatus of claim 5, wherein: the telescopic ring is characterized in that a telescopic groove (11) for placing the telescopic ring (3) is formed in the end face of the first protective shell (1), the side wall of the telescopic ring (3) is attached to the inner wall of the telescopic groove (11), the telescopic ring (3) can move in the telescopic groove (11) and extends to the outer side of the telescopic groove (11), and a telescopic component (6) for driving the telescopic ring (3) to move is mounted in the telescopic ring (3).

7. The busway power transmission apparatus of claim 6, wherein: the telescopic component (6) comprises a screw rod (61) rotatably installed on the end face of the telescopic ring (3), the screw rod (61) is arranged on the inner bottom face of the telescopic groove (11) in a penetrating mode and is in threaded connection with the first protective shell (1), and the screw rod (61) extends into the installation groove (31); the operation rod (51) is fixedly connected with a first bevel gear (511), the screw rod (61) is fixedly connected with a second bevel gear (611) meshed with the first bevel gear (511), the operation rod (51) is rotationally connected with a limiting block (52), and the limiting block (52) is slidably mounted on the inner wall of the placement groove (32).

8. The busway power transmission apparatus of claim 7, wherein: the positioning component (7) for limiting the screw (61) is arranged on the mounting block (21), a first transmission groove (212) is formed in the side wall of the mounting block (21), a second transmission groove (213) communicated with the locking groove (211) is formed in the inner wall of the first transmission groove (212), and the positioning component (7) comprises a positioning block (71) placed in the first transmission groove (212) and a transmission block (72) placed in the second transmission groove (213); the end face of the screw rod (61) is provided with a positioning groove (612) for inserting the positioning block (71), one end of the transmission block (72) is in contact with the locking block (41), the other end of the transmission block (72) is provided with a transmission inclined plane (721), and the transmission inclined plane (721) is in contact with the side edge of the positioning block (71).

9. The busway power transmission apparatus of claim 1, wherein: and a sealing ring (22) is fixedly connected to the end face, facing the first protective shell (1), of the second protective shell (2).

10. A multi-layer bus duct electric connection method using the bus duct electric transmission device according to any one of claims 1 to 9, characterized by comprising the steps of:

s1, firstly, placing a bus duct body between a first protective shell (1) and a second protective shell (2), and then rotating an operating rod (51) according to the length of the bus duct body to enable a telescopic ring (3) to extend out of a telescopic groove (11);

s2, when the telescopic ring (3) stretches out to a preset position, the second protective shell (2) moves towards one side close to the first protective shell (1), so that the locking block (41) locks the mounting block (21), and meanwhile the positioning block (71) positions the screw (61), so that the mounting between the first protective shell (1) and the second protective shell (2) is completed;