JPS5941541Y2 - conductor support - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conductor support in a reduced type switchgear, etc.

Electrical equipment such as switches and disconnectors are housed in the tank of the reduced-size switchgear, and these electrical equipment are connected by conductors.

This type of conductor is supported by a support device on the tank wall as shown in FIGS. 1 and 2.

To explain Figure 1 and Figure 2, 1 is the tank wall of the reduced type switchgear, 2, 2... are the conductors arranged inside the tank wall, 3, 3... - is a conductor support.

This conductor support is attached to a support plate, side wall, etc., which are not shown in FIGS. 1 and 2.

The conventional support device is shown in Fig. 3a. In the structure shown in b, 4 is the side wall (or support plate) installed inside the tank.
The boss 4a is welded and fixed, and 5 is a molded support insulator (support insulator) that integrally has a mounting bracket 6 at its lower end. ing.

Reference numeral 8 denotes a supporting metal fitting that supports a conductor (bus bar) integrally molded on the upper end of the mold support insulator 5. A holding metal fitting 9 is applied from the upper surface of the supporting metal fitting 8, and the conductor 2 in the support hole 11 is tightened with a bolt 10.

By the way, when attaching a conductor to a support plate, etc. using this conductor support, the position of the conductor itself and the direction in which it extends are often not as designed due to errors in assembly or processing. , it may not be possible to install it as it is, or even if it can be installed forcibly, a large load will be applied to the mounting part and it will break over time.

Therefore, in the conductor support having the above structure, the screwing amount of the mounting bracket 6 screwed into the boss 4 is adjusted, and the support bracket 8 is adjusted.
A method is used to adjust the height of the

However, in this method, the direction in which the conductor extends is constant, and the direction in which the support hole 11 that supports the conductor extends must also match this direction.
It is difficult to install the screws in a way that does not create stress in each part, as it can only be done up to 10% of the screw size.

In addition, since the support holes 11 are made with holes of the same diameter and have a structure in which the conductor is tightened on the entire inner wall of the hole, if the direction in which the conductor extends does not match the direction in which this support hole extends, correction should be made. There is no method for this, and installation causes stress in each part, which is not desirable.

Furthermore, this adjustment work, which is performed without the ability to finely adjust the height or change the direction of the support hole, requires a lot of time and requires advanced adjustment techniques by skilled workers. It was.

Therefore, an object of the present invention is to provide a conductor support whose directionality and mounting position can be freely and easily adjusted.

In order to achieve such an object, the present invention is such that a cylindrical retainer is attached orthogonally to the top of a vertically-adjustable support insulator so that its mounting position can be changed in at least two directions. The holding fitting has a small diameter part on the inner wall of the approximately central part in the axial direction, and the small diameter part can hold the round conductor, so that the round conductor can be held not only in a two-dimensional shape but also in a three-dimensional shape around the small diameter part. It is designed to be able to rotate in the axial direction while also sliding in the axial direction.

Embodiments of the present invention will be specifically described below with reference to the drawings.

An embodiment of the conductor support of the present invention is shown in FIGS. 4 to 7.

As shown in FIG. 4, this conductor support has a mounting bracket 14 at one end that is screwed into the inner wall of a ring-shaped boss 13 fixed by welding to a side wall (support plate) 12 of a tank, etc., and at the other end. It consists of a support insulator 16 having a cylindrical support fitting 15, and a holding fitting 18 consisting of two tightening pieces fixed on the support fitting 15 with two bolts 17 with holes.

A male thread is also cut on the outer periphery of the boss 13, and a locking cap nut 18 is screwed into the boss 13.

After properly screwing the support insulator 16 into the boss 13 through the mounting bracket 14, the cap nut 19 is tightened, and the upper surface of the inner flange 20 of the cap nut 19 is elastically brought into contact with the lower end of the mounting bracket 14. The supporting insulators 16 are brought into contact with each other to prevent them from rotating.

As shown in FIGS. 6 and 7, the holding fitting 18 consists of two disc-shaped fastening pieces 21 and 22, and the lower surface of the upper holding piece 21 has a semicircular shape passing through the center. Groove 23 in cross section
A groove 24 having a semicircular cross section passing through the center is provided on the upper surface of each of the lower supporting and tightening pieces 22.

When the two fastening pieces 21 and 22 are overlapped, the grooves 23 and 24 of both pieces form a support hole 26 with a circular cross section that can hold the conductor 25.

Furthermore, narrow protrusions 27 and 28 are provided along the inner circumferential walls at the center portions of these grooves 23 and 24, and the conductor 25 is held at the small diameter portions of the inner circumferential walls of the protrusions 27 and 28.

In addition, each part other than the protrusions 23 and 24 is tapered,
It is expanding towards the evening H rule.

Furthermore, bolt insertion holes 29 are provided on both sides of the grooves 23 and 24 of the tightening pieces 21 and 22, respectively.

Further, a seat hole 30 is provided in the upper part of the bolt insertion hole 29 of the restraining and tightening piece 21, and the head of the socket bolt 17 is inserted into this seat hole 3°.

On the other hand, four screw holes 31 are provided on the upper surface of the support fitting 15 of the support insulator 16.

These screw holes 31 are arranged at 90 degree intervals along a concentric circle centered on the center line of the threaded portion of the mounting bracket 14, and the diameter of the concentric circle is equal to the diameter of the pair of bolt insertion holes 29 of the retainer 18. Matches the pitch.

The bolt 17 has two screw holes 31 (one set of screw holes) arranged at symmetrical positions with respect to the center of the support fitting 15.
They are designed to be screwed together.

In such a conductor support, the support insulator is suitably screwed onto the boss 13 attached to the support plate 12 via the threaded part of the removable metal fitting 14, and the support insulator is placed over the support metal fitting 15. The position (height) of the groove bottom of the tightening piece 22 is adjusted by changing the degree of screwing.

After that, cover the conductor 25 with the restraining clamping piece 21, insert the socket bolt 17 into the bolt insertion hole 29 of both clamping pieces 21 and 22, and screw the tip into the screw hole 31 of the support fitting 15. The conductor 25 is fixed to the support fitting 15 with the conductor 25 being held between the clamping pieces 21 and 22.

At this time, since two sets of screw holes 31 are provided at 90 degree intervals on the upper surface of the support fitting 15, the height adjustment can be made by finely adjusting the height corresponding to the pitch H of the threads of the mounting fitting 14. It becomes possible.

Therefore, the height of the bottom surface of the inner circumferential wall of the protrusion 28 of the support and tightening piece 22 can be made approximately equal to the height of the conductor 25 in a free state where it is not subjected to external force.

Further, even if the axis of the conductor 25 is slightly inclined with respect to the center line of the support hole 26, the support hole 26 extending on both sides of the protrusion 27, 28 is expanded. If the degree of inclination is within the opening degree, the conductor 25 can be supported without applying any bending force.

Further, even if the degree of inclination is large, the extent to which the conductor 25 is regulated and deformed by the support hole 26 is smaller than that by conventional conductor supports, and each part of the support part is hardly damaged.

According to such an embodiment, it is possible to finely adjust the support height of the conductor, and there is also tolerance for the support posture.

As a result, the conductor can be supported without applying unreasonable force to each part of the support part, and the work becomes easier and the work time can be shortened.

Further, according to this embodiment, since the structure is simple, the number of manufacturing steps and materials can be reduced.

Note that the present invention is not limited to the above embodiments.

For example, the circumference of the screw hole provided in the support bracket is divided into 6 equal parts and 8 equal parts to enable further fine adjustment.
A set or four sets may be provided.

Further, the screw holes do not necessarily need to be arranged at equal intervals.

In addition, as in the second embodiment shown in FIGS. 8a-c, the grooves 23.24 provided in the double-lined pieces 21.22 abut two tapered holes at their central portions, and the inner diameter of the abutting portion is Alternatively, the conductor 25 may be supported by the abutting portion 32 so as to be the smallest.

In this way, the mounting direction of the conductor 25 relative to the holding fitting 18 can be adjusted to some extent.

In addition, in order to obtain the same effect, as shown in the third embodiment of FIG. You can also use it as

Furthermore, since the protrusions 27, 28 and the abutting portions 32 engage with the conductor 25 with a small contact area, by loosening the clamping pressure on the conductor 25, the conductor 25 can be moved in the axial direction.

As described above, according to the conductor support fitting of the present invention, the mounting position of the conductor and the directionality not only two-dimensionally but also three-dimensionally can be easily adjusted, reducing the number of work hours, and the small diameter part allows the conductor to Since the conductor can be held in place with less force, the conductor is movably supported in its axial direction, allowing for easy support of the conductor, which prevents damage to each member and enables highly reliable support. Become.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view of a reduced-sized switchgear equipped with a conductor support, Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. 1, and Figs. 3a and b show conventional conductor supports. Figure a is a partially cutaway front view, and Figure a is a plan view. Fig. 4 is a cross-sectional front view showing the first embodiment of the conductor support of the present invention, Fig. 5 is a plan view of the support metal fitting in the conductor support, and Figs. 6 and 7 are the same pair of fasteners. A cross-sectional view and a plan view of a restraining metal fitting consisting of a piece, FIGS.
The plan view and FIG. 9 are front views, partially in section, according to a third embodiment of the present invention. 1...tank wall, 2...conductor, 3...
...Conductor support, 4...Boss, 4a...
... Side wall (support plate), 5 ... Mold support insulator (support insulator), 6 ... Mounting bracket, 7 ...
...Nut, 8...Support metal fittings, 9...
Holder, 10... Bolt, 11...
Support hole, 12...Side wall (support plate), 13...
...Boss, 14...Mounting bracket, 15...
...Supporting metal fittings, 16...Support insulator, 17...
... Bolt with hole, 18... Holder fitting, 19.
...Fukuro Natsuto, 20...Tsubabe, 21...
...Suppressing tightening piece, 22...Supporting tightening piece, 2
3.24...Groove, 25...Conductor, 26
...Support hole, 27.28 ...Protrusion, 2
9... Bolt insertion hole, 30... Seat hole,
31...screw hole, 32...butting part.

Claims (3)

[Scope of utility model registration request] (1) A holding metal fitting made of a cylindrical body is attached perpendicularly to the top of the support insulator vertically installed so as to be adjustable in height, so that the mounting position can be changed in at least two directions, and the holding metal fitting is installed approximately at the center in the axial direction. A conductor support comprising a small diameter part on an inner wall thereof, the small diameter part being capable of holding a round conductor. (2) The conductor support according to claim 1, wherein the small diameter portion is a protrusion formed to protrude from the inner circumferential wall of the cylindrical body. (3) The conductor support according to claim 1, wherein the small diameter portion is an abutting portion formed by gradually increasing the inner thickness of the inner circumferential wall of the cylindrical body from both ends.