JPH0736436Y2 - Busbar / lightning arrester connection device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the gas-insulated switchgear according to the present invention, the end of the busbar and the end of the arrester, which are fixed to each other, are connected by a connecting body, and The present invention relates to a busbar / lightning arrester connecting device in which a connecting body is removed to be in an open state.

[Conventional technology]

In this type of conventional busbar / lightning arrester connecting device, as shown in FIG. 3, a busbar 4 penetrates and is supported by an insulating spacer 3 which is interposed between pipelines 1 and 2 in the vertical direction. An end conductor 5 at the end of the bus bar 4 which is fixed to the upper part, and an end conductor 7 at the end of the lightning arrester 6 which is fixedly arranged in the lower part of the pipeline 2.
A connecting body A that detachably connects the bus bar 4 and the lightning arrester 6 is provided between and.

An operation port 8 for attaching and detaching the connector A is formed in the conduit 2, and the operation port 8 is airtightly closed by a lid 9. Further, an insulating gas such as SF ₆ gas is sealed inside the pipelines 1 and 2.

The connecting body A is constructed as shown in FIGS. 4 and 5, and is an upper connection in which an end conductor 5 on the bus bar 4 side integrally has a connecting guide rod 10 extending downward in the center. conductor
11 is connected by two detachable bolts 12 with hexagonal holes,
A lower connecting conductor 14 having a guide hole 13 into which the guide rod 10 is slidably fitted in the end conductor 7 on the side of the arrester 6
Are connected by two detachable bolts 15 with hexagonal holes.

Further, on the upper surface of the lower connecting conductor 14, a plurality of split type contactors 16 that come into contact with the outer peripheral surface of the guide rod 10 fitted into the guide hole 13 are supported by hexagon socket mounting bolts 17, respectively. A shield cap 18 covering the outside of the contact 16 is attached by fastening the plurality of attachment pieces to the lower connecting conductor 14 simultaneously with each contact 16 by the attachment bolts 17, and the inner surface of the cap 18 Contact pressure springs 19 are respectively interposed between the contactor 16 and each contactor 16. 20
Is a guide ring fixed to the inner peripheral surface of the guide hole 13 of the lower connecting conductor 14.

Therefore, in the connection body A, the upper connecting conductor 11 connected to the end conductor 5 of the bus bar 4 and the lower connecting conductor 14 connected to the end conductor 7 of the lightning arrester 6 are connected to the guide rod 10 and each contact. The bus bar 4 and the lightning arrester 6 are connected to each other via the connector 16, and the connecting body A connects them.

When removing the connection body A, first, the upper connection conductor
Loosen the two attachment / detachment bolts 12 of 11 until the tip detaches from the end conductor 5, and loosen the two attachment / detachment bolts 15 of the lower connecting conductor 14 until the tip detaches from the end conductor 7. After that, the upper connecting conductor 11
The lower connection conductor 14 and the lower connection conductor 14 are laterally pulled out in a state in which both the conductors 11 and 14 are connected.

On the other hand, Japanese Patent Application No. 54-147784 (Japanese Utility Model Publication No. 55-69816) discloses the following as a gas-insulated bus bar.

A busbar conductor that serves as a current-carrying path is placed in the center of the busbar jacket
This busbar conductor is held in its position by an insulating spacer fixedly arranged on the busbar jacket, and this busbar conductor is
A connecting conductor that is connected to the spacer internal busbar conductor provided in the center of the insulating spacer, and a flexible conductor that is fixed to this connecting conductor by bolting or welding, and that is provided between the connecting conductors and serves as the main current path. And a hollow tube slidably fitted in the connection conductor and accommodating and supporting the flexible conductor therein.

Then, assembling, a flexible conductor is fixed to the connecting conductor by bolts or the like, and a busbar conductor inserted into the hollow pipe is prepared. One of the fixed connection conductors is fixed by a bolt, and the busbar jacket is coaxially connected to the busbar conductor to the insulating spacer.

Next, the connection conductor at the other end to which the flexible conductor lengthened by the connection section is fixed is extracted from the hollow tube and fixed to the spacer inner busbar conductor of the insulating spacer which is not yet attached.

Thereafter, the insulating spacer is connected to the busbar jacket and, at the same time, the flexible conductor and the connecting conductor are inserted into the hollow tube, thereby completing the connection of one section. In this way, the busbar jacket, the busbar conductor, and the insulating spacer are sequentially assembled to assemble the gas-insulated busbar.

[Problems to be solved by the invention]

In the case of the conventional busbar / lightning arrester connecting device shown in FIGS. 4 and 5, a plurality of split contacts 16 are provided for connecting the upper connecting conductor 11 and the lower connecting conductor 14 to the outer circumference of the guide rod 10. Not only requires a plurality of contacts 16 and a plurality of mounting bolts 17 for individually supporting each contact 16, but also a shield cap 18 and a plurality of contact springs 19 However, there is a problem that the number of parts is increased, the structure is very complicated, and the cost is high.

In the case of the gas-insulated busbar of Japanese Utility Model Application No. 54-147784, a busbar conductor including a connecting conductor, a flexible conductor and a hollow tube, a busbar jacket, and an insulating spacer are sequentially assembled. However, it is not applicable to the case where the end of the busbar and the end of the arrester, which are in a fixed state with each other, are brought into a connected state by a connecting body or in a released state.

The present invention has been made in consideration of the above points, and an object thereof is to provide a busbar / lightning arrester connecting device which has a simple structure and is inexpensive.

[Means for solving problems]

In order to solve the above-mentioned problems, a busbar / lightning arrester connecting device of the present invention is provided with an end portion of a busbar fixed in an upper part in a vertical pipe line and a lightning arrester in a fixed state in a lower pipe line. The end portion of the busbar / lightning arrester connecting device, in which the connecting body is connected by a connecting body from an operation port for attachment / detachment of the pipeline, and the connecting body is removed to be in an open state. The body is a disk-shaped upper substrate, an upper cylindrical portion integrally formed downward from the peripheral edge of the upper substrate and having a curved outer peripheral surface, and a circular body integrally formed in the central portion of the bottom surface of the upper substrate. An upper connecting conductor consisting of a columnar protrusion, a disk-shaped lower substrate, a lower cylindrical portion integrally formed upward from the peripheral edge of the lower substrate and having a curved outer peripheral surface, and an upper surface of the lower substrate. A cylindrical sheath integrally formed in the center and slidably fitted in the protrusion. A lower connecting conductor consisting of a lead body, an S-shaped band-shaped flexible connecting lead, and a through hole at the upper end of the lead, and screwed into the projecting portion, A connecting bolt having an upper end connected to the end face of the protrusion, and a through hole at the lower end of the lead, which is screwed into the inner bottom of the shield body, and the lower end of the lead is attached to the inner bottom surface of the shield body. A connecting bolt connected to the connecting bolt, and the connecting body is inserted between the end of the busbar and the end of the lightning arrester in a direction orthogonal to the line connecting the both ends, Inserting into the through hole between the upper cylindrical portion of the upper substrate and the protruding portion and screwing into the end of the bus bar, the upper connecting conductor is detachably connected to the end of the bus bar, The lower attachment / detachment bolt is used as a through hole between the lower tubular portion of the lower substrate and the shield body. Inserted and screwed into the ends of the arrester, in which the lower connection conductor is connected detachably to the end of the lightning arrester.

[Action]

The busbar / lightning arrester connecting device of the present invention configured as described above is provided at the upper and lower parts of the pipeline, and the end of the busbar and the end of the arrester, which are in a fixed state, are attached to and detached from the pipeline. From the operation port for operation, in the direction orthogonal to the line connecting the both ends, the connecting body can be inserted and brought into the connected state, and the connecting body can be removed into the released state, and The number of parts is small, the structure is simple and the cost can be reduced.

〔Example〕

Next, the present invention will be described in detail with reference to FIGS. 1 and 2 showing one embodiment thereof.

In these figures, the connector A'is configured as follows.

21 is an upper connecting conductor, 22 is a disc-shaped upper substrate of the conductor 21,
Reference numeral 23 denotes an upper cylindrical portion integrally formed downward from the peripheral edge of the upper substrate 22, the outer peripheral surface thereof is a curved upper cylindrical portion, and 24 is a cylindrical protrusion integrally formed at the central portion of the bottom surface of the upper substrate 22, The upper connection conductor 21 is formed by these.

25 is a lower connecting conductor, 26 is a disk-shaped lower substrate of the conductor 25,
27 is integrally formed upward from the peripheral edge of the lower substrate 26, the outer peripheral surface is a curved lower cylindrical portion, and 28 is integrally formed in the central portion of the upper surface of the lower substrate 26, and is slidable on the protrusion 24. The reference numeral 29 denotes a cylindrical shield body fitted to the guide ring, and 29 denotes a guide ring fitted to the inner circumference of the tip end portion of the shield body 28. The guide ring is in sliding contact with the outer peripheral surface of the protrusion 24, thereby forming the lower connecting conductor 25.

Reference numeral 30 is a band-shaped flexible connecting lead bent in an S shape, 31 is inserted into a through hole at the upper end of the lead 30, and is screwed into the protrusion 24.
An upper connecting bolt that connects the upper end of the lead 30 to the end face of the protrusion 24, and 32 is inserted into a through hole at the lower end of the lead 30 and screwed into the inner bottom of the shield body 28 to shield the lower end of the lead 30. A lower connection bolt connected to the inner bottom surface of the body 28, electrically connecting the upper connection conductor 21 and the lower connection conductor 25, and after connecting the upper connection conductor 21 and the lower connection conductor 25 by the connection lead 30, By fitting the shield body 28 of the lower connecting conductor 25 to the projection 24 of the upper connecting conductor 21, a connecting body A'is formed.

Then, the lid 9 of the conduit 2 shown in FIG. 3 is opened, and the connector A ′ is connected to the end conductor 5 at the end of the bus bar 4 and the end conductor 7 at the end of the lightning arrester 6 from the operation port 8 for attachment / detachment. Inserted from a direction orthogonal to the line connecting the both end conductors 5 and 7, between the two upper hexagon socket attachment / detachment bolts 33, the upper tubular portion 23 of the upper substrate 22 and the protrusion 24. The upper connecting conductor 21 is detachably connected to the end portion of the bus bar 4 by being inserted into the through hole 34 and screwed into the end conductor 5 of the bus bar 4.

Next, the two lower attachment / detachment bolts 35 with hexagonal holes are inserted into the through holes 36 between the lower tubular portion 27 of the lower substrate 26 and the shield body 28, and screwed into the end conductors 7 of the lightning arrester 6. And lower connection conductor 25
Is detachably connected to the end conductor 7 of the lightning arrester 6.

At this time, the connecting lead 30 serving as a connecting portion between the upper connecting conductor 21 on the bus bar 4 side and the lower connecting conductor 25 on the lightning arrester 6 side has the protrusion 24.
Since it is housed in the shield body 28 whose upper end opening is closed, the connecting portion is mechanically and electrically shielded.

By the way, the protrusion 24 and the shield body 28 fitted to the protrusion 24 are formed to have a relatively large diameter in order to accommodate the connection lead 30 inside the shield body 28.
By increasing the diameter of the sliding guide portion between the lower connecting conductor 25 and the lower connecting conductor 25, an effect of increasing seismic strength can be obtained.

In the above-described embodiment, the case where the projection 24 is integrally formed on the upper connecting conductor 21 on the bus bar 4 side and the shield body 28 is integrally formed on the lower connecting conductor 25 on the lightning arrester 6 side is shown. It may be.

The upper connecting conductor 21 and the lower connecting conductor 25 may be directly connected to the ends of the bus bar 4 and the arrester 6, respectively.

Further, it is needless to say that the present invention can be applied to the case where the pipeline 2 is located in the horizontal direction and the bus bar 4 and the lightning arrester 6 are arranged on one side and the other side of the pipeline 2.

[Effect of device]

Since this device is constructed as described above,
The following effects are achieved.

The busbar / lightning arrester connecting device of the present invention is located at an upper portion and a lower portion in the pipeline 2, and has an end portion of the busbar 4 and an end portion of the arrester 6 which are in a fixed state, respectively, for connecting and disconnecting the pipeline 2. From the operation port 8 in a direction orthogonal to the line connecting the both ends,
The connecting body A'can be inserted to bring it into a connected state, and the connecting body A'can be removed to bring it into a released state. Moreover, the number of parts is small, and the structure can be simple and inexpensive. .

Moreover, since the flexible connecting lead 30 is in the shape of a band bent in an S shape, the axial lengths of the bus bar 4 and the arrester 6 can be shortened, and the overall size can be reduced. The withstand voltage test of the bus bar 4 can be performed by removing the bus bar.

[Brief description of drawings]

1 and 2 show an embodiment of the busbar / lightning arrester connecting device of the present invention. FIG. 1 is a cut-away front view, and FIG.
Fig. 3 is a plan view taken along the line YY ', Fig. 3 is a partially cut front view of a gas-insulated switchgear to which the conventional busbar / arrester connection device is applied, and Fig. 4 is a cutaway front view of the conventional busbar / arrester connection device. 5 and 5 are plan views taken along the line XX 'in FIG. 2 ... pipe, 4 ... bus bar, 6 ... lightning arrester, 21 ... upper connecting conductor, 22 ... upper substrate, 23 ... upper cylindrical portion, 24 ... projection, 25 ... lower connecting conductor, 26 …… Lower substrate, 27 …… Lower tubular part, 28 …… Shield body, 30 …… Connection lead, 31 ……
Upper connection bolt, 32 …… Lower connection bolt, 33 …… Upper attachment / detachment bolt, 35 …… Lower attachment / detachment bolt.

Claims (1)

[Scope of utility model registration request] 1. An upper end of a busbar fixed in an upper part of a pipeline in the vertical direction and an end part of a lightning arrester fixed in a lower part of the conduit for attaching and detaching the conduit. A busbar / lightning arrester connecting device in which a connection body is connected by an operation port and the connection body is removed to open the connection body, wherein the connection body is a disc-shaped upper substrate and the upper substrate. An upper connecting conductor, which is integrally formed downward from the peripheral edge of the upper peripheral portion and has a curved outer peripheral surface, and a cylindrical protrusion integrally formed in the central portion of the bottom surface of the upper substrate, -Shaped lower substrate, a lower cylindrical portion integrally formed upward from the peripheral edge of the lower substrate and having a curved outer peripheral surface, and integrally formed in the central portion of the upper surface of the lower substrate and slidable on the protrusion A lower connecting conductor consisting of a cylindrical shield body fitted to the A strip-shaped flexible connecting lead, a connecting bolt that is inserted into a through hole at the upper end of the lead, is screwed into the protrusion, and connects the upper end of the lead to the end face of the protrusion, Is formed through a through hole at the lower end of the shield body, is screwed into the inner bottom portion of the shield body, and is constituted by a connecting bolt that connects the lower end portion of the lead to the inner bottom surface of the shield body. Between the end portion and the end portion of the lightning arrester, inserted from a direction orthogonal to a line connecting the both end portions, and an upper attaching / detaching bolt is provided between the upper cylindrical portion of the upper substrate and the protruding portion. The lower connecting bolt is inserted into the through hole and screwed into the end of the bus bar, the upper connecting conductor is detachably connected to the end of the bus, and the lower attaching / detaching bolt is attached to the lower tubular portion of the lower substrate and the shield. Insert it into the through hole between the body and screw it into the end of the arrester, The arrester bus-arrester connection apparatus detachably connected to an end of the.