WO2005062325A1

WO2005062325A1 - Disconnector

Info

Publication number: WO2005062325A1
Application number: PCT/JP2003/016314
Authority: WO
Inventors: Eiji Moritoh; Naoyuki Nakatsukasa
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2003-12-19
Filing date: 2003-12-19
Publication date: 2005-07-07
Also published as: CN1802720A; JPWO2005062325A1; TWI260663B; JP4352050B2; TW200522111A; CN100346436C

Abstract

A disconnector comprising a movable conductor (1) for connecting/disconnecting/earthing an electric line, an insulating holder (7) for securing an input terminal part (3), a connecting terminal part (5) and an earthing terminal part (6), an insulating rod (13) for driving the movable conductor (1), and an operating mechanism (10) performing positional control of the movable conductor (1) through the insulating rod (13). The operating mechanism (10) operates the movable conductor (1) to perform linear motion for touching the input terminal part (3) and the connecting terminal part (5) to each other through the movable conductor (1) thus bringing the electric line into connected state. The electric line is brought into earthed state when the input terminal part (3) and the earthing terminal part (6) are touched through the movable conductor (1) and brought into disconnected state when the movable conductor (1) touches the input terminal part (3).

Description

Description Disconnector Technical field

The present invention relates to a structure of a disconnector for connecting, disconnecting, and grounding an electric circuit (also referred to as a three-point disconnector). Background art

For example, Japanese Unexamined Patent Publication No. Heisei 3-2-272529 discloses that a movable blade pivotally connected to a hinge, a fixed contact terminal and a ground terminal that contact the movable blade, and an operation connected to the movable blade. In a three-position disconnection device equipped with a shaft and a bearing for receiving an operation shaft, a disconnection in which a fixed contact terminal, a hinge for pivotally connecting a movable blade, a bearing, and a ground terminal are fixed to the same supporting insulator. The device (disconnector) is shown.

In this conventional disconnecting device, the movable blade, the ground terminal, and the fixed contact terminal, which are members constituting the main circuit, are integrally attached to the supporting insulator.

The operating mechanism is mounted on the outside of the switch gear housing, and connects the main circuit component and the operating mechanism with a link (operating rod). In the disconnecting device described in No. 3-2 7 2 5 292, the main circuit component and the operating mechanism are not integrated, and the main circuit component and the operating mechanism are respectively provided on the switch gear housing. After installation, it is necessary to adjust the connection position, disconnection position, and ground position of the movable blade, and the adjustment time increases because the main circuit component is hidden in the switch gear housing.

In addition, it is necessary to ensure the manufacturing dimensional accuracy of the switchgear housing. There was also a title.

Japanese Patent Application Publication No. 2000-2-161861 discloses that a fixed contact connected to a terminal on the movable contact side of a circuit breaker and a circuit breaker element disposed below the circuit breaker. A first movable contact attached to a conductor supported on a frame fixed to the container via an insulating support, and a first operating mechanism for operating the first movable contact; The operating axis of the mechanism is a circuit breaker that is led out of the element container and is connected to the output shaft of the operating device, a fixed contact attached to the conductor, and a second attached to the frame. A movable contact and a second operating mechanism for operating the second movable contact are provided, and the operating shaft of the second operating mechanism is led out of the circuit breaker element container and connected to the output shaft of the operating device. Gas insulated switchgear with line-side ground switch Location is shown.

That is, a gas insulated switchgear in which the connection 'disconnection' ground is constituted by two different movable electrodes (movable contacts) is shown.

As described above, in the disconnecting switch shown in the gas insulated switchgear of Japanese Patent Application Laid-Open No. 2002-218681, two different movable electrodes (the connecting position, the disconnecting position, and the grounding position) are formed. (Movable contacts), the connection with the operating mechanism becomes complicated, and the number of parts in the main circuit components increases, so that downsizing cannot be achieved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a high productivity three-point disconnector (that is, connecting a circuit, grounding, and disconnecting) which can reduce the time required for assembly and adjustment work. The primary purpose is to provide a disconnecting switch.

It is a second object of the present invention to provide a three-point disconnector that can be downsized by simplifying the device configuration, making the main circuit components compact, and reducing the number of components. Further, a third object is to provide a three-point disconnector capable of improving withstand voltage performance. Disclosure of the invention

In a disconnector according to the present invention, a movable conductor for connecting, disconnecting, and grounding an electric circuit, and an insulating holder for fixing and arranging an input terminal, a connection terminal, and a ground terminal at a predetermined distance from each other are provided. A disconnecting switch including an insulating rod for driving the movable conductor by electrically insulating the movable conductor, and an operation mechanism for controlling the position of the movable conductor via the insulating rod. A linear motion is made to bring the input circuit into a connected state by contacting the input terminal and the connection terminal via the movable conductor.The input circuit is grounded by contacting the input terminal and the ground terminal via the movable conductor. In addition, the electric circuit is configured to be disconnected by the movable conductor contacting only the input terminal section, and the operating mechanism and the insulating holder are fixed to one intermediate plate to be integrated.

Therefore, according to the present invention, any one of the connection state, the disconnection state, and the ground state of the electric circuit can be obtained by a simple configuration in which the movable conductor is simply moved linearly. A disconnector (three-point disconnector) that can reduce the time required for adjustment work can be provided. Furthermore, disconnectors (three-point disconnectors) that are compact by reducing the number of parts and compacting the main circuit components (ie, movable conductors, input terminals, connection terminals, ground terminals, insulating holders, etc.) ) Can be provided. Further, according to the present invention, since the operation mechanism and the insulating holder are fixed and integrated on one intermediate plate, it is easy to confirm the position control status of the movable conductor by the operation mechanism, so that the adjustment work is further simplified. Be converted to Brief Description of Drawings

FIG. 1 is a sectional view showing a configuration of a disconnector according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II of FIG.

FIG. 3 is a diagram for explaining a connection state, a disconnection state, and a ground state of the disconnector according to the first embodiment.

FIG. 4 is a cross-sectional view showing a configuration of an insulating holder used for a disconnector according to a second embodiment.

FIG. 5 is a diagram for explaining a configuration of an insulating holder used for a disconnector according to a third embodiment.

FIG. 6 is a sectional view showing a configuration of a disconnector according to a fourth embodiment. FIG. 7 is a cross-sectional view taken along line VH-W in FIG.

FIG. 8 is a diagram showing another configuration example of the insulating holder used in the disconnector according to the fourth embodiment.

FIG. 9 is a cross-sectional view taken along line IX-IX of FIG.

FIG. 10 is a sectional view showing a configuration of a disconnector according to a fifth embodiment of the present invention.

FIG. 11 is a sectional view showing a configuration of a disconnector according to a sixth embodiment of the present invention.

FIG. 12 is a diagram for explaining a connection state, a disconnection state, and a ground state of the disconnector according to the sixth embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1-FIG. 1 is a sectional view showing a configuration of a disconnector according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG.

As shown in FIG. 1, the main circuit component of the disconnector according to the present embodiment includes a movable conductor 1 for connecting / disconnecting / grounding an electric circuit, an input terminal 3, and a current-carrying contact 31. An input terminal section composed of a cylindrical conductor 2 for maintaining the linear motion of the movable conductor 1 while reliably maintaining electrical contact with the conductor 4, and a conductor 4 for electrically connecting and fixing the cylindrical conductor 2 and the input terminal 3; It is composed of a connection terminal 5 and a conductive contact 3 2, a connection terminal for obtaining a connection state of an electric circuit by contacting the input terminal via the movable conductor 1, a ground terminal 6 and a conductive contact 3. And a ground terminal for contacting the input terminal via the movable conductor 1 to obtain a ground state of the electric circuit.

The input terminal 3, the connection terminal 5, and the ground terminal 6 are fixed to a cylindrical (for example, cylindrical) insulating holder 17 with bolts 9.

That is, the input terminal section, the connection terminal section, and the ground terminal section move the movable conductor 1 in a linear direction, and the input terminal section and the connection terminal section come into contact with each other via the movable conductor 1 so that the electric circuit is connected. When the input terminal and the ground terminal are in contact with each other via the movable conductor, the electric circuit is grounded, and when the movable conductor contacts only the input terminal, the electric circuit is disconnected. It is fixedly arranged on the insulating holder 17 at a predetermined distance. The movable conductor 1 is fixed to an end of the insulating rod 13 on the main circuit side. The rotation of the intermediate shaft 11 of the operating mechanism 10 causes the insulating port 13 to linearly drive, and the movable conductor 1 fixed to the end of the insulating port 13 also moves in the linear direction. .

As is clear from FIGS. 1 and 2, in the disconnector according to the present embodiment, the cylindrical insulating holder 7 for three phases is attached to one intermediate plate 8 and the three-phase Operation mechanism for linearly moving the movable conductor 1 Are also attached to the intermediate plate 8.

That is, the operating mechanism 10 and the three-phase insulating holder 7 are fixed to and integrated with one intermediate plate.

Further, the operation mechanism 10 arranged on the intermediate plate 8 is connected to an operation unit (not shown) by the intermediate shaft 11.

The movable conductor 1 is electrically insulated by an insulating pad 13 and is connected to the operation mechanism 10.

The cylindrical conductor 2, the connection terminal 5, and the ground terminal 6 are respectively provided with current-carrying contacts 31, 32, and 33.

Current-carrying contacts include those in the shape of a band and those in the shape of a coil spring.

FIG. 3 is a diagram for explaining a connection state, a disconnection state, and a grounding state of the disconnector according to the present embodiment. FIG. 3 (a) shows a state when an electric circuit is connected, and FIG. Figure (b) shows the state when the circuit is disconnected, and Figure 3 (c) shows the state when the circuit is grounded.

In order to bring the electric circuit into a connected state, the insulating pad 13 having the movable conductor 1 fixed to the end is linearly driven in the direction of the connection terminal 5 by the operating mechanism 10.

Then, in the connection state of the electric circuit, as shown in FIG. 3 (a), the input terminal 3, the cylindrical conductor 2, the conductor 4, and the current-carrying contact are passed through the movable conductor 1 linearly moved in the direction of the connection terminal 5. The input terminal section composed of 31 and the like and the input connection terminal section composed of the connection terminal 5 and the energizing contact 32 are in contact with each other and are electrically connected.

Further, in order to bring the electric circuit into a ground state, the insulating rod 13 having the movable conductor 1 fixed to the end is linearly driven by the operating mechanism 10 in the direction of the ground terminal 6. Then, in the grounding state, as shown in FIG. 3 (c), the input terminal 3, the cylindrical conductor 2, and the conductor 2 move through the movable conductor 1 linearly moving in the direction of the ground terminal 6. 4, and the input terminal section composed of the current-carrying contact 31 and the ground terminal section composed of the ground terminal 6 and the current-carrying contact 33 are in contact with each other and are electrically connected.

In addition, in order to disconnect the electric circuit, as shown in FIG. 3 (b), the movable conductor 1 does not come into contact with either the connection terminal portion or the ground terminal portion, but comes into contact with only the input terminal portion to connect. What is necessary is just to be in the state which is doing.

That is, in order to obtain the disconnection state of the electric circuit, the insulating rod 13 may be driven linearly by the operating mechanism 10 and stopped at the position where the movable conductor 1 is in contact with only the input terminal.

As described above, in the disconnector according to the present embodiment, the operating mechanism 10 linearly moves the movable conductor 1, and the input terminal and the connection terminal come into contact with each other through the movable conductor 1, thereby forming an electric circuit. In the connection state, the electric circuit is grounded when the input terminal and the ground terminal contact via the movable conductor 1, and the electric circuit is disconnected when the movable conductor 1 contacts only the input terminal. Make up.

Accordingly, since the movable conductor 1 is simply moved linearly to obtain the connection state, the disconnection state, or the ground state of the electric circuit, the time required for the assembly and adjustment work can be reduced.

Furthermore, since the configuration is simple, downsizing can be achieved by making the main circuit configuration part compact and reducing the number of parts.

In addition, by fixing the operating mechanism 10 and the insulating holder 7 to one intermediate plate 8 and integrating them, it is easy to confirm the position control status of the movable conductor 1 by the operating mechanism 10 and the adjustment work is further improved. Simplified.

Embodiment 2

FIG. 4 is a cross-sectional view showing a configuration of an insulating holder 7 used in the disconnector according to the second embodiment. In the disconnector according to Embodiment 1 described above, an insulating holder 17 for fixing and arranging the input terminal, the connection terminal, and the ground terminal at a predetermined distance from each other is provided separately for each phase. However, in the present embodiment, as shown in FIG. 4, three-phase insulating holders are integrally formed.

This eliminates the need to separately attach the individual insulating holders 17 provided for each phase to the intermediate plate 8, and can further improve the assemblability. Embodiment 3.

FIG. 5 is a diagram for explaining the configuration of an insulating holder used in the disconnector according to the third embodiment. FIG. 5 (a) is a cross-sectional view from the side as in FIG. FIG. 5 (b) is a top view.

The disconnector according to the present embodiment is characterized in that, for example, a vent 20 is provided in an insulating holder of the disconnector according to the first embodiment.

As shown in FIG. 5, ventilation holes 20 are provided in the upper and lower portions of the insulating holder 7 on the connection terminal side and the ground terminal side.

The position where the vent 20 is provided is not limited to the position shown in FIG.

In the figure, the arrow indicated by the symbol A indicates the flow of air, and the provision of the vent 20 can further improve the convective cooling efficiency of the movable conductor 1 forming the electric circuit.

In addition, there is also an effect of preventing a conductive foreign substance that may be generated during the connection operation from adhering to the inner surface of the insulating holder 17 and lowering the creeping withstand voltage performance of the insulating holder 7.

Embodiment 4.

FIG. 6 is a sectional view showing a configuration of a disconnector according to a fourth embodiment. FIG. 7 is a cross-sectional view taken along line Vn-νΠ in FIG.

Insulating holder used for disconnector according to Embodiment 1 or 3 described above 17 is cylindrical, but the insulating holder of the disconnector according to the present embodiment has at least two opposing flat supporting structures (plate-like insulating structures) as shown in FIG. 6 or FIG. It is characterized by comprising members 7a and 7b). By making the insulating holder flat, the productivity of the insulating holder can be improved as compared with the case where the insulating holder is cylindrical.

FIG. 8 is a diagram showing another configuration example of the insulating holder used in the disconnector according to the fourth embodiment, and FIG. 9 is a cross-sectional view taken along line IX-IX of FIG.

In the example of FIGS. 6 and 7, the two flat support structures (that is, the plate-shaped insulating members 7a and 7b) are vertically arranged in parallel. In the example shown in the figure, two flat support structures (that is, the plate-shaped insulating members 7a and 7b) are vertically arranged.

8 and 9, the same effects as in the examples of FIGS. 6 and 7 can be obtained.

Embodiment 5

In the disconnector according to Embodiment 1 described above, the input terminal 3 forming the input terminal, the connection terminal 5 forming the connection terminal, and the ground terminal 6 forming the ground terminal are individually cylindrically shaped. However, in the disconnector according to the present embodiment, as shown in FIG. 10, when the insulating holder 17 is formed and manufactured, the input terminal 3, the connection terminal 5, and the connection terminal are connected to each other. The ground terminal 6 is embedded at the same time.

That is, the input terminal portion, the connection terminal portion, and the ground terminal portion are formed integrally with the insulating holder 17.

By embedding the insulation holder at the same time as molding, the input terminal Bolts for attaching the connection terminal portion and the ground terminal portion are not required, and the assemblability can be further improved.

Embodiment 6

FIG. 11 is a sectional view showing a configuration of a disconnector according to a sixth embodiment. In the disconnector according to the above-described first embodiment, the mechanism for linearly moving the movable conductor 1 is configured to linearly move the insulating port 13 by rotation of the intermediate shaft 10 connected to the operation unit (not shown). .

On the other hand, in the disconnector according to the present embodiment, as shown in FIG. 11, a hollow portion is provided in the movable conductor 1, an internal thread is formed on the inner peripheral surface of the hollow portion, and the insulating rod is provided. At the end of the main circuit side of 13, a screw rod 14 with a male screw formed to engage with this female screw is fixed, and this screw rod 14 is fitted into the hollow part of the movable conductor 1. It is characterized by the following.

In the disconnector configured as described above, by rotating the insulating rod 13, the screw rod 14 fixed to the insulating rod 13 also rotates.

Since the male screw formed on the screw rod 14 and the female screw formed on the inner peripheral surface of the hollow portion of the movable conductor 1 are engaged, the movable conductor 1 moves linearly when the screw rod 14 rotates. I do.

As a result, the operation space of the intermediate shaft 10 can be omitted, and the configuration can be made more compact.

FIG. 12 is a diagram for explaining a connection state, a disconnection state, and a grounding state of the disconnector according to the sixth embodiment. FIG. 12 (a) shows a state when an electric circuit is connected. FIG. 12 (b) shows a state when the electric circuit is disconnected, and FIG. 12 (c) shows a state when the electric circuit is grounded.

As is clear from the figure, by rotating the insulating rod 13, the male threaded rod 14 fixed to the end of the insulating rod 13 and the end of the insulating port 13 does not have linear mobility. The movable conductor 1 depends on the rotation direction of the insulating rod 13 Move to connection terminal side or ground terminal side.

Therefore, similarly to the first embodiment, it is possible to obtain the connection state, the ground state, and the disconnection state of the electric circuit.

In the present embodiment, since the operation space of the intermediate shaft 10 can be omitted, the configuration can be made more compact.

Industrial applicability

The present invention is intended to realize a three-point disconnector that can be easily assembled and adjusted and that can be reduced in size (that is, a disconnector that can obtain a connection state, a ground state, and a disconnection state of an electric circuit). It is valid.

Claims

The scope of the claims

1. Fix the movable conductor (1) for connecting / disconnecting / grounding the electric circuit, the input terminal (3), the connection terminal (5) and the ground terminal (6) at a predetermined distance from each other. The insulating holder (7) to be arranged, an insulating port (13) for electrically insulating and driving the movable conductor (1), and the movable conductor (13) via the insulating port (13). A disconnecting switch comprising an operating mechanism (10) for performing the position control of (1), and

The operating mechanism (10) causes the movable conductor (1) to linearly move, and the input terminal section (3) and the connection terminal section (5) come into contact with each other via the movable conductor (1). When the input terminal section (3) and the ground terminal section (6) come into contact with each other via the movable conductor (1), the electric circuit is grounded, and the movable conductor (1) is connected to the input terminal section (1). 3) A disconnector characterized in that the electrical circuit is configured to be in a disconnected state by contacting only with the disconnection switch.

2. The cutting device according to claim 1, wherein the operating mechanism (10) and the insulating holder (7) are fixed to and integrated with one intermediate plate (8).

3. The disconnecting device according to claim 1, wherein the three-phase insulating holder (7) is formed in the body.

4. The disconnector according to claim 1, wherein the insulating holder (7) is cylindrical and has a vent (20) on a side surface.

5. The disconnector according to claim 1, wherein the insulating holder (7) is composed of two plate-shaped insulating members (7a, 7b) arranged to face each other.

6. The above input terminal (3), connection terminal (5) and ground terminal (6) The disconnector according to any one of claims 1 to 4, wherein the disconnector is integrally formed with the insulating holder (7).

7. The movable conductor (1) has a cylindrical shape, a female screw is formed on the inner peripheral surface of the hollow part, and the insulating rod (13) has a male screw formed at the end to engage with the female screw. 7. The movable conductor (1) is linearly moved by rotating the insulating pad (13), the screw rod (14) being fixed thereto. Disconnector according to item 1.