JPH1064380A - Solid insulating switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an outside diametrical dimension of a polar column part. SOLUTION: A lever 33 is turnably supported between an end part of a movable lead bar of a vacuum interrupter and an insulating rod perpendicular to the movable lead bar, and a groove passing through the axis is formed in the end part of the movable lead bar, and a second arm 35b is joined by a pin in a condition of being fitted in the groove, on the one hand, a special bolt 30 screw-fitted to the insulating rod and a pair of first arms 35a and 35a are joined together by a pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-state insulated switchgear, in which the outer diameter of a pole is reduced.

[0002]

2. Description of the Related Art As a switchgear, there is a solid insulated switchgear in which a charged portion is molded and insulated from a resin. As shown in FIG. 6, the solid insulated switchgear includes a portion in which a charging unit is molded with resin as a resin, an operation unit for operating a vacuum interrupter, and the like. As shown in FIG. 6, the solid insulated switchgear is divided into a fixed part 1 and a movable part 2, and the movable part 2 is provided with wheels 3 and can be carried in and out.

First, the fixing section 1 will be described. In the figure,
4 is a three-phase cable, 5 is a cable-side disconnection portion connected to the cable 4, 6 is a ground shaft, 7 is a grounding switch, 8 is a three-phase bus, and 9 is a bus-side disconnection.

Next, the movable section 2 will be described. Reference numeral 16 denotes a pole, 10 denotes a three-phase true-phase interrupter, 11 and 12 denote external conductors that are led out of the vacuum interrupter 10 and are connected to the cable-side disconnection portion 5 and the bus-side disconnection portion 9, and 13 operates the vacuum interrupter 10 Operating unit, 14 is a control unit, 1
Reference numeral 5 designates the movable part 2 as the fixed part 1 by screwing the screw shaft 15a.
An operation unit 17 for rotating the screw shaft 15a for coupling to or separating from the unit is a current transformer.

Here, the structure of the pole 16 will be described in detail with reference to FIG. The vacuum interrupter 10 has a state in which a fixed lead bar 37 and a movable lead bar 38 project from above and below a container 36. The upper conductor 18 integral with the outer conductor 11 is connected to the fixed lead rod 37 via the bolt 19. The movable lead rod 38 is slidably provided on the contact case 22 via the ring contact 23. In order to drive the movable lead rod 38, a lever 25 rotatably supported by the contact case 22 via the pin 24 is coupled to the movable lead rod 38 via the pin 26, while being insulated via the pin 27. It is connected to one end of a rod 28. Note that 32
Is a hole for connecting the end of the external conductor 12 to the contact case 22.

The upper conductor 1 coupled as described above
An internal assembly including a vacuum interrupter 10, a contact case 22, and the like is molded by a resin 29.

As shown in FIG. 8, the lever 25 has two sets of arms 25a and 25b which are substantially perpendicular to each other. The lever 25 is inserted into the hole 20 at the center of the lever 25. It is rotatably supported by the contact case 22 via the pin 24. Lever 25 and movable lead rod 38
As shown in FIG. 9, the pin 26 is inserted into the pair of elongated holes 21 via the collar 31 to connect the pair of arms 2 to each other.
The pin 26 is inserted into a through-hole 38a that passes through the movable lead rod 38 disposed between 5a and 25a in the diameter direction. On the other hand, the connection between the lever 25 and the insulating rod 28 is made by a special bolt 30 sandwiched between the pair of arms 25b, 25b.
And a pair of arms 25b, 25b are rotatably connected by a pin 27, and a special bolt 30 is screwed onto an insulating rod 28.

[0008]

However, the lever 25
Is a pair of arms 2 with a movable lead rod 38 having a large outer diameter.
5A and 25A, the dimension A in FIG. 9 is increased, and the contact case 22 and the resin 29 are further enlarged.
The outside diameter of the pole column 16 also becomes large, which hinders miniaturization of the pole 16.

Therefore, an object of the present invention is to provide a solid insulated switchgear which solves the above-mentioned problem.

[0010]

According to a first aspect of the present invention for achieving the above object, when the movable lead rod and the lever are connected to each other by a pair of arms sandwiching the movable lead rod, Since the inner diameter of the contact case must be increased by the amount of the arm of
On the other hand, the present invention is characterized in that a groove passing through the axis is formed in the end face of the movable lead rod, and the arm is fitted in the groove and rotatably pin-coupled.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment, since a part of the conventional solid insulated switchgear is improved, the same reference numerals are given to the same parts as the conventional one, and the description thereof will be omitted, and only different parts will be described.

(A) Embodiment 1 FIGS. 1 and 2 show the configuration of a solid insulated switchgear according to the present invention. In the present invention, a lever having the shape shown in FIG. 1 is used for connecting the movable lead rod of the vacuum interrupter to the insulating rod. The lever 33 includes a cylindrical shaft portion 34, a pair of first arms 35a, 35a, and first arms 35a, 35a.
And a single second arm 35b perpendicular to the second arm 35b. A hole 53 is formed in the first arms 35a, 35a, while a long hole 52 is formed in the second arm 35b.

As shown in FIG. 2, the lever 33 is
Is rotatably attached to the contact case 22 via a pin 39 inserted into the contact case 22. At the end of the movable lead rod 38 of the vacuum interrupter, a groove 40 is formed radially and passing through the axis, and a hole 41 penetrating the movable lead rod 38 in the radial direction is formed at right angles to the groove 40. . After the collar 42 is inserted into the long hole 52, the second arm 35b is fitted into the groove 40, and the pin 43 is inserted into the hole 41 and the collar 42, thereby connecting the movable lead rod 38 and the lever 33. Have been. A pair of first arms 35a, 3
The connection between 5a and special bolt 30 is almost the same as before,
Description is omitted.

When a groove is formed at the end of the movable lead rod, the cross-sectional area of the movable lead rod is reduced, and when the operating force is large, the movable lead rod made of soft copper may cause tensile failure. In such a case, it is preferable to braze the stainless metal fitting 44 at a position not in contact with the ring contact 23 as shown in FIG. 3 and form the groove and the hole 41 in the stainless steel fitting 44.

In such a solid insulated switchgear, FIGS.
Since the second arm 35b does not exist outside the movable lead rod 38, when the thickness of the contact case 22 and the like is constant, the outer diameters of the contact case 22 and the resin 29 are reduced. It can be smaller than before.

(B) Embodiment 2 The movable lead rod has a large outer diameter in order to secure a current-carrying area, and has a large mass since the material is copper. Therefore, an operation unit having a large operation force is required to obtain the shutoff and injection speed required for the vacuum interrupter.

In the second embodiment, the weight of the movable lead rod is reduced by forming a part of the movable lead rod with a lightweight metal.

FIG. 4 shows that a female screw part 47 is formed upward from the end face of the lower end of the movable lead rod 38 while a screw part 4 is formed at one end of a cylindrical auxiliary rod 46 made of aluminum.
9 is formed, and a screw portion 49 is screwed into the female screw portion 47 to lengthen the entire length of the movable lead rod. Auxiliary rod 46
The material may be duralumin instead of aluminum, and the members forming the male screw portion and the female screw portion may be interchanged and reversed. The movable lead rod 38 and the vacuum interrupter 1
A spline 51 is formed in a sliding portion with the end plate 50 constituting the container No. 0.

FIG. 5 shows a structure in which the auxiliary rod 46 shown in FIG. 4 is fixed to the movable lead rod 38 via an adhesive without being screw-connected.

In the solid insulated switchgear constructed as shown in FIGS. 4 and 5, the mass of the entire movable lead rod is light, so that the operating force for obtaining a constant vacuum circuit breaker closing / closing speed can be reduced. it can. Therefore, the operation unit can be downsized.

[0021]

As can be seen from the above description, claim 1
According to the solid insulated switchgear according to the above, the second arm is fitted into the groove formed at the end of the movable lead rod and is rotatably supported by the pin. Occupy the contact case, and the entire contact case and further the entire pole can be reduced in size.

Also, if the contact cases are the same,
Since the energizing area can be increased by increasing the outer diameter of the movable lead rod, heat generation is suppressed and the energizing capability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lever according to a first embodiment of a solid insulated switchgear according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of a pole according to the first embodiment of the solid insulated switchgear according to the present invention.

FIG. 3 is a configuration diagram of a vacuum circuit breaker according to Embodiment 1 of the solid insulated switchgear according to the present invention.

FIG. 4 is a configuration diagram of a vacuum interrupter according to a second embodiment of the solid insulated switchgear according to the present invention.

FIG. 5 is a configuration diagram of a vacuum interrupter according to a second embodiment of the solid insulated switchgear according to the present invention.

FIG. 6 is a configuration diagram of a conventional solid insulated switchgear.

FIG. 7 is a sectional view of a pole in a conventional solid insulated switchgear.

FIG. 8 is a perspective view of a lever in a conventional solid insulated switchgear.

FIG. 9 relates to a conventional solid insulated switchgear, and FIG.
Arrow view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Vacuum interrupter 13 ... Operation part 28 ... Insulating rod 35a ... First arm 35b ... Second arm 38 ... Movable lead rod 40 ... Groove 41 ... Hole 43 ... Pin 52 ... Slot

Claims (1)

[Claims] An opening / closing section and an operating section for operating the opening / closing section are provided, and a movable lead rod whose opening / closing section is opened / closed by reciprocating movement is arranged substantially at a right angle to the movable lead rod to be linked to the operating section. And a reciprocatingly driven rod is rotatably connected to a pair of substantially perpendicular arms of a rotatably supported lever via respective pins so as to be rotatably connected to each other in a solid insulated switchgear. A groove is formed at the end of the movable lead rod so as to pass through the axis, and one arm of the lever is formed as a single arm, and the movable lead rod and the arm are fitted with one arm fitted into the groove. A solid insulated switchgear, characterized in that the pin is passed through the switch.