JPS5836191Y2 - gas - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in the connection structure of gas-insulated busbars.The purpose of the invention is to improve the connection structure of gas-insulated busbars. The purpose is to enable easy access to one or both sides in a narrow space.

The busbar unit, which houses an internal conductor in a conduit filled with insulating gas and has insulating spacers at both ends, absorbs expansion and contraction due to thermal expansion and dimensional errors, so as shown in Figure 1, the busbar unit 1, An expansion joint 3 is provided between the two pipes, and the two pipes are connected via this.

However, since busbar units have internal conductors, even if an expansion joint is installed between the conduits of the busbar units, in order to remove any connected busbar unit, at least one adjacent busbar unit must be moved. I needed to do it.

Therefore, when a busbar unit is removed due to a busbar accident or the like, it is necessary to stop power transmission over a wide area and disassemble the unit depending on its location.

As one means for solving this problem, a structure shown in FIG. 2 has been proposed.

That is, in addition to the busbar units 1, 2 and the expansion joint 3 to be connected to each other, a connection busbar unit 4 is provided which is made up of a shorter pipe line 4a, an insulating spacer 4b, and an internal conductor 4C.

When separating the bus units l-1 and 2, compress the expansion joint 3 to the right and move the connection bus unit 4 to the right to connect the internal conductor 4C to the internal conductor 1 of the bus unit 1.
C, and then the connection busbar unit 4 is removed from the expansion joint 3.

By the way, it is well known that a T-branch busbar unit is used to supply power in branches.

Here, the T-branch busbar unit that was conventionally considered is
Connecting conductors were protruding and fixed on both sides.

For this reason, when the T-branch busbar unit and the linear busbar units disposed on both sides thereof are brought into contact with and separated from each other, there is a drawback that a large space is required on both sides of the T-branch busbar unit.

In addition, in order to selectively connect and disconnect the T-branch internal conductor and either one of the internal conductors of the both-side busbar units, a connecting busbar unit as shown in FIG. Gas from the busbar unit had to be recovered.

This invention was made to eliminate such drawbacks,
This will be explained in detail below.

FIG. 3 shows an embodiment of the structure of the busbar connection section according to the present invention, and FIG. 4 shows the state of the connection section when the busbar units are separated in the above embodiment.

First, in FIG. 3, the conduit 1a of the bus unit 1 is connected to the T-branch conduit 5a of the T-branch bus unit 5 via an expansion joint 3.

The other end of the conduit 5a of the T-branch bus unit is further connected to the conduit of the next bus unit (not shown) via an expansion joint 6, and the branched end of the conduit 5a is connected to the bus unit 7. It is connected to the conduit 7a.

Each of these busbar units is provided with insulating spacers 1 b , 5 b 1 , 5 b 2 , and 5 b 3 at the ends of the conduit, which airtightly partition the inside of each conduit and also allow the internal conductor 1C1 to move inside the movable interior. It holds conductors 5C1 and 5C2 and a T-branch internal conductor 5C3.

Note that each insulating spacer has a 0-
'Jung A is installed, and each maintains an airtightness with respect to the adjacent section, and as will be explained next, the movable internal conductors 5C1 and 5C2 are designed to be able to slide left and right while maintaining an airtightness. is being done.

That is, the movable internal conductor 5C of the T-branch bus unit 5
1 and 5C2 are connected to the internal conductors 1C and 8C of the adjacent busbar units by sliding them in the left and right direction, respectively.
They can be freely connected or separated via sliding contacts 1d and 8d.

Further, the T-branch internal conductor 5C3 has a cylindrical part B for connecting the movable internal conductors at both ends on the side, and the movable internal conductor 5C1゜5C
Reference numeral 2 denotes a sliding contact portion Bl which has one end inserted into the cylindrical portion B from the left and right sides, and is provided at each entrance of the cylindrical portion A.

B2 respectively connect to the cylindrical portion B, that is, the internal conductor 5C3.

Therefore, by moving the movable internal conductor 5C1 to the right or the movable internal conductor 5C2 to the left, the T-branch internal conductor 5C3 can be separated from the internal conductor 1C or 8C of the adjacent bus bar unit.

Note that the movable internal conductors 5C1 and 5C2 are provided with appropriate holding means (not shown) to prevent them from moving unnecessarily due to vibrations, electromagnetic force, or the like.

The T-branched tip of the T-branch internal conductor 5C3 is further connected to a power transmission/reception line via a switch (not shown).

Therefore, the power is transferred from the above power transmission/reception line via the switch to T.
It is added to the branching bus unit 5, branched from there, and sent to the respective lines from the left and right bus units.

As mentioned above, both ends of the conduit 5a of the T-branch bus unit are connected to the conduit of the right bus unit via the expansion joints 3 and 6, and the movable internal conductors 5C1 and 5C2 are connected to the expansion joint 3. , 6, sliding contacts 1 are connected to internal conductors 1C and 8C of adjacent busbar units, respectively.
d and 8d.

Note that the insulating spacers 5 at both ends of the T-branch bus unit 5
bl and 5b2 are conical in shape and protrude inside the bus bar unit 5 as shown in the figure.

Furthermore, hand holes 5e are provided at both ends of the T-branch conduit 5a.
1, 5e2 are provided.

Here, for example, in order to separate the left line, the gas inside the T-branch busbar units 1-5 and the expansion joint 3 is recovered, respectively, in FIGS. 3 and 4.

Next, open the hand hole 5el as shown in FIG.
By sliding the movable internal conductor 5C1 to the right and moving it to the position shown in the figure, the internal conductor of the bus unit 1 and the internal conductor 5C3 of the T-branch bus unit 5 are separated, and the expansion joint 3 is removed. By compressing it to the left, the interior can be inspected from between it and the insulating spacer 5bl.

Similarly, the right movable internal conductor 5C2 can be moved to separate and inspect the line of the right bus unit.

As described above, according to the present invention, (1) There is no need to provide separate connection conduit busbars, insulating spacers, etc. between the busbar units, and separation and extraction are possible using the conventional connection space.

(2) Since the bus unit is divided into gases for each unit, there is no need to recover the gas from the adjacent bus unit when separating.

There are advantages such as

In addition, both movable internal conductors 5C1 and 5C2 are connected to the hand hole 5.
It is operated separately and independently from el and 5e2, and there is no need to store parts such as gears in the cylindrical part B, so the structure is simple.

Moreover, regardless of the diameter of the cylindrical portion B, both movable internal conductors 5
Strokes of C1 and 5C2 can be selected, and a large disconnection distance can be achieved.

In the above embodiments, the present invention has been explained by taking a single-phase bus as an example, but it can be similarly applied to a three-phase bus, and the present invention is more effective in that case.

As described in detail above, the present invention allows gas insulated busbars to be connected or separated easily and in a narrow space, and has a great effect as a connection structure of this type.

[Brief explanation of the drawing]

FIG. 1, FIG. 2 are all sectional views showing the structure of this type of conventional device, FIG. 3 is a sectional view showing an embodiment of the present invention, and FIG. FIG. 1: bus bar unit, 1a: conduit, 1b: insulating spacer,
1C: Internal conductor, 1d: Sliding contact, 2: Busbar unit, 3: Expansion joint, 4: Connection busbar unit, 4a: Conduit, 4b: Insulating spacer, 4C: Internal conductor, 5: T branch busbar Unit, 5a: Pipeline, 5bl, 5b2.5b3:
Insulating spacer, 5C1, 5C2: Movable internal conductor, 5C3
: T-branch internal conductor, 5el, 5e2: hand hole,
6: Expansion joint, 7: Busbar unit, 7a: Pipeline, 8C:
Internal conductor, 8d: sliding contact, A: O-ring, B: cylindrical part, Bl, B2: sliding contact part.

Claims (1)

[Scope of utility model registration request] A T-branch busbar unit, an expansion joint connected to both ends of the lateral part thereof, and a busbar unit connected to each expansion joint, and the T-branch busbar unit has a cylindrical part formed in the lateral part. A T-branch internal conductor, a T-branch conduit that covers it, an insulating spacer that closes each side end of this conduit and has a protrusion inside, and one end of each insulating spacer. a movable internal conductor that is slidably supported in an airtight manner and has its other end in contact with a sliding contact portion provided at each tip of the cylindrical portion, and a portion of the movable internal conductor is retracted into the cylindrical portion; and the T-branch. and a hand hole provided in a position corresponding to the movable internal conductor in the utility conduit, and each busbar unit is composed of a conduit, an insulating spacer that seals the tip of the conduit, and an internal conductor that passes through the spacer. . A gas-insulated bus connection structure, characterized in that the T-branch internal conductor and the internal conductors of both line units are connected to and separated from each other within the expansion joint by the movable internal conductors.