JPS6025817Y2 - Busbar branch connection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a busbar branch connection device that connects a core conductor of a busbar and a connection conductor of a branch.

Generally, a connecting device as shown in FIG. 1 is used to connect a power transmission or other relatively thick bus bar to a connecting conductor of a branch.

That is, the exposed end of the core conductor 2 of the busbar 1 and the connecting conductor 4 of the branch 3 are butted together so that they are coaxial, and a large number of metal contacts 5 are provided across both conductors 2 and 4. are mutually energized by.

The connection conductor 4 of the branch 3 is connected to the branch conductor 7 in a T-shape within the insulator 6 of the branch 3, and the bus bar 1 and the branch conductor 7 are connected through the connection conductor 4. electrically connected.

Furthermore, a rubber stress cone 9 is fitted onto the outer peripheral surface of the insulation coating 8 of the bus bar 1, and the stress cone 9 is pushed to the turnout 3 side by a holding fitting 10 and its tightening port 11. When pressed, the truncated conical portion 12 of the stress cone 9 is pushed into the recess 13 of the insulator 6, and the bus bar 1 and the branching conductor 7 are connected via the connecting conductor 4.

By the way, when electrically connecting the core conductor 2 of the bus bar 1 and the connecting conductor 4 of the branch 3, the work is difficult because both conductors 2 and 4 are facing each other and the contact 5 is applied. This is extremely difficult and causes a decline in work efficiency.

In addition, since the stress cone 9 of the recessed part 13 is formed in a shape that follows the outer shape of the truncated conical part 12, the bus bar 1 and the turnout 3 can be adjusted in the axial direction at the connection part of the bus bar 1. Even if it is possible to do so, adjustment movement cannot be performed if a tilted deviation occurs with respect to the axis.

As a result, an air layer is formed between the stress cone 9 and the insulator 6, which may cause dielectric breakdown.

Although not shown, a relatively thick second busbar similar to the left side is connected to the right side of the turnout 3.

This invention was made with the above-mentioned points in mind.Next, the bus bar branch connection device of this invention will be explained in detail along with FIGS. 2 and 3 showing one embodiment thereof. explain.

In FIG. 2, the core conductor 15 of the first bus bar 14 has an exposed portion 17 lacking the insulation coating 16 at its end, and a bolt 18 is screwed into the axial center of the end surface of the core conductor 15. A hole 19 is provided, and a bolt 18 is inserted into the open end of the screw hole 19.
A recess 21 is formed for partially accommodating the hexagonal columnar head 20 of.

On the other hand, a large number of contacts 22 made of metal plates are pressed into contact with the outer periphery of the exposed portion 17, and each of the contacts 22 is connected to a third
As shown in the figure, the projecting edges 23 and 24 are inserted into notch grooves 26 and 27 on the periphery of the annular body 25, and are arranged radially around the axis of the core conductor 15.

Then, the left and right ears 28 and 29 of the contacts 22 are engaged within the frames of the metal annular support frames 30 and 31, and each contact 22
is held in an annular shape and is constantly pressed onto the surface of the exposed portion 17 by tightening by the screw-like springs 32 and 33.

The one support frame 30 is integrally attached to a cylindrical metal fitting 34 for preventing corona discharge, and this support frame 30
The other support frame 31 is screwed onto the support frame 31, and the cylindrical metal fitting 34 is integrally molded within a flare portion 36 of an elastic insulator 35 made of rubber or the like.

The elastic insulator 35 is slidably fitted to the outer circumferential portion of the first bus bar 14, and the open end surface 37 of the flare portion 36 protrudes in a spherical shape.

Further, the outer peripheral surface of the elastic insulator 35 is approximately ICP to icr'
Covered with a conductive rubber coating having a specific resistance of Ωcm,
The ground layer 39 on the outer peripheral surface of the bus bar 14 is energized.

These form a first connector 40 attached to the first bus bar 14.

On the other hand, the branch 41 consists of a connecting conductor 42, a branching conductor 43 connected to the connecting conductor 43 in a T-shape, and a block-shaped insulator 44 such as epoxy resin. Holes 45, 46 are formed.

Further, the block-shaped insulator 44 has spherical recesses 47 and 48 formed on both end faces thereof, with the connection conductor 42 at the center, and one recess 47 serves as an elastic insulator for the first connector 40. It is formed into a spherical shape along the opening end surface 37 of the body 35 .

Then, as shown on the left side of FIG. 2, the first connector 40
Shift to the left from the end face of the first generatrix 14 of the first generatrix 1
4 is placed between the illustrated turnout 41 and an adjacent turnout (not shown), the head 20 of the bolt 18 screwed into the waist screw hole 19 is placed opposite the hole 45 of the connecting conductor 42, and the core conductor 15 and the connecting conductor 42, the head 20 of the bolt 18 is rotated using a thin jig, and the head 20 of the bolt 18 is simply inserted into the hole 45 of the connecting conductor 42. The conductor 15 and the connecting conductor 42 are aligned with each other, and then the first connector 40 fitted to the bus bar 14 is slid to the right.

As a result, each contactor 22 comes to straddle the core conductor 15 and the connecting conductor 42 of the branch 41, as shown on the right side of FIG. 2, thereby energizing them mutually.

Further, the end face of the elastic insulator 35 is connected to the recessed part 4 of the turnout 41.
7.

Next, a rectangular plate-shaped holding fitting 49 is applied to the flare part 36 whose outermost circumference is circular, and the tightening bolts 50 inserted into the four corners of the holding fitting 49 are screwed into the branch 41. is pressed against the branch 41 and fixed.

Further, the second bus bar 51 has the same structure as the first bus bar 14, and the second connector 52, which is slidably fitted to the second bus bar 51, is also connected to the first bus bar 14. The connector 40 has a similar structure.

The second connector 51 is connected to the first connector 40 described above.
It is fixed to the turnout 41 as shown in the figure in the same manner as in the case of .

Note that the other ends of each of the first and second busbars 14.51 are provided with connectors similar to those described above so as to be connected to other branching devices.

As described above, according to the bus bar branch connection device of this invention, the connector is slidably fitted to the outer circumferential surface of the bus bar, the contact is installed inside the connector, and the contact is positioned at the sliding position of the contact. On the other hand, by forming an exposed part in the core conductor part, the position of the connector can be freely shifted with respect to the end face of the core conductor of the bus bar, and the connection between the core conductor of the bus bar and the connecting conductor of the branch or When disconnecting, by shifting the connector away from the branch, it is extremely easy to rotate the bolts around the axes of both conductors, improving work efficiency.

Further, the opening end surface 37 of the elastic insulator 35 of the connector 40 is made to protrude in a spherical shape, and the recessed part 47 of the insulator 44 of the branching device 41 is formed in a spherical shape along the opening end surface 37. The airtightness of the joint surface between the two is improved.

That is, when a tilted deviation with respect to the axis occurs between the core conductor 15 of the bus bar 14 and the connecting conductor 42 of the branch 41, this can be absorbed by the rotation of the spherical joint surface, and the joint surface Since no air layer is formed between the two, a good airtight connection is obtained, and as a result, there is no dielectric breakdown such as flash at the bonding surface. However, in this case, this voltage increased to 25KV, and the dielectric strength increased to approximately 1.5KV.
It has been proven that this can be improved by 4 times.

Further, by aligning the core conductor of the busbar and the connection conductor of the branch with the head of the bolt at the center of their axis, alignment and connection/removal work becomes reliable and easy.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of a conventional busbar branch connection device.
FIG. 2 is a cutaway side view of a bus bar branch connection device according to an embodiment of the invention, and FIG. 3 is a partially enlarged sectional view of FIG. 2. 14...Bus bar, 15...Core conductor, 2
2...Contactor, 35...Elastic insulator,
37...Opening end surface, 40...Connector,
41... Branch, 42... Connection conductor, 47... Recessed portion.

Claims (1)

[Scope of utility model registration request] A busbar branch connection in which the core conductor of the busbar and the connection conductor of the branchout are mutually energized by inserting an elastic insulator of a connector provided at the end of the busbar into a recessed portion of the branchout. In the device, the connector is slidably fitted to the outer circumferential surface of the bus bar, and the contactor is installed inside the connector,
Further, an exposed portion is formed in the core conductor portion on which the contactor slides as the connector slides, and the open end surface of the elastic insulator is made to protrude in a spherical shape, and the recessed portion is formed in the open end surface. Busbar branch connection device formed into a spherical shape.