JP2014155323A - Interlock device for drawer-type power reception/distribution apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interlock device capable of easily performing alignment at a disconnection position, a test position and a connection position.SOLUTION: The interlock device comprises: a drawer-type power reception/distribution apparatus 2; a freely movable wagon 4 with the power reception/distribution apparatus 2 placed thereon; a screw cradle 5 fixed to the wagon 4; an in/out screw rod 6 which is threaded to the screw cradle 5 for moving the power reception/distribution apparatus 2; a disconnection position hole 20a, a test position hole 20b and a connection position hole 20c which are provided in the in/out screw rod 6; and an interlock pin 10 which is provided in the power reception/distribution apparatus 2 and of which the distal end is fitted into the disconnection position hole 20a, the test position hole 20b and the connection position hole 20c.

Description

  Embodiments of the present invention provide an interlock for a drawer-type power distribution device that cannot be moved once at a predetermined position when a drawer-type power distribution device such as a vacuum circuit breaker or an air switch is put in and out of the box. Relates to the device.

  Conventionally, when a drawer-type power receiving / distribution device is taken in and out of a switchgear box, an interlock device is provided to temporarily disable movement at the disconnection position for disconnecting from the main circuit and the connection position connecting to the main circuit. (For example, refer to Patent Document 1). For the movement of the power receiving / distributing device, a screw base provided in the power receiving / distributing device main body and a screw screw rod which is screwed into the screw receiving base are used (for example, see Patent Document 2).

  An interlock device of this type is shown in FIG. 5, and a vacuum circuit breaker 2 is movably installed on the floor plate 1 of the switchgear box. The vacuum circuit breaker 2 is mounted and fixed on a carriage 4 having wheels 3. Note that the wheel 3 on the left side of the drawing is indicated by a two-dot chain line because the members overlap each other. A screw receiving base 5 is fixed to the front side surface of the carriage 4, and an access screw rod 6 provided with a trapezoidal screw is screwed together. The entrance / exit screw rod 6 passes through the reinforcing member 7 separated from the carriage 4, and the end 6 a is covered with a protective cover 8 having a U-shaped cross section. A handle (not shown) is fitted into the end portion 6a so that the screw rod 6 can be rotated.

  On the front side of the vacuum circuit breaker 2, an interlock pin 10 supported by a support plate 9 so as to be movable in the vertical direction is provided. An interlock plate 11 having a U-shaped cross section is fixed to the floor plate 1, and a disconnect position hole 11a, a test position hole 11b, and a connection position hole 11c into which the tip of the interlock pin 10 is fitted are provided. A front door 12 fixed to the box is provided on the front side, and the handle is fitted from the opening 12a with the front door 12 closed.

  Thereby, the vacuum circuit breaker 2 can be moved to a predetermined position by rotating the access screw rod 6. However, the vacuum circuit breaker 2 does not necessarily move linearly on the floor board 1, and it may be difficult to fit the interlock pin 10 in each hole 11a, 11b, 11c. That is, there is play in the movement of the vacuum circuit breaker 2 from the viewpoint of operability, and the interlock pin 10 is fitted into the holes 11a, 11b, and 11c at a predetermined position while finely adjusting the main body in the front-rear and left-right directions. There was a thing. For this reason, there has been a demand for an apparatus that can easily align and improve workability.

JP 2008-113525 A JP 2012-130199 A

  The problem to be solved by the present invention is to provide an interlock device for a drawer-type power receiving / distributing device that can be easily aligned at a disconnection position, a test position, and a connection position.

  In order to solve the above-described problems, an interlock device for a drawer-type power receiving / distributing device according to an embodiment includes a power receiving / distributing device, a movable carriage on which the power receiving / distributing equipment is mounted, and a screw receiving base fixed to the carriage. And an input / output screw rod for screwing the screw receiving base and moving the power receiving / distributing device, a disconnect position hole, a test position hole, a connection position hole provided in the input / output screw rod, and the power receiving / distributing device. And an interlock pin whose tip is fitted into the disconnection position hole, the test position hole, and the connection position hole.

The principal part expanded side view which shows the structure of the interlock apparatus of the drawer | drawing-type electric power distribution apparatus which concerns on Example 1 of this invention. The top view which shows the structure of the trolley | bogie of the vacuum circuit breaker which concerns on Example 1 of this invention. The figure explaining operation of the interlock apparatus of the drawer | drawing-type electric power distribution apparatus which concerns on Example 1 of this invention. The principal part expanded side view which shows the structure of the interlock apparatus of the drawer | drawing-type electric power distribution apparatus which concerns on Example 2 of this invention. The principal part expanded side view which shows the structure of the interlock apparatus of the conventional drawer | drawing-out type electric power distribution apparatus.

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

  First, an interlock device for a drawer-type power receiving and distributing device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an enlarged side view of a main part showing the configuration of an interlock device for a drawer-type power receiving / distributing device according to Embodiment 1 of the present invention, and FIG. 2 is a configuration of a carriage of a vacuum circuit breaker according to Embodiment 1 of the present invention. FIG. 3 is a diagram for explaining the operation of the interlock device of the drawer type power receiving and distributing device according to the first embodiment of the present invention. In addition, the same code | symbol was attached | subjected to the component similar to the past. The drawer type power distribution device will be described using a vacuum circuit breaker.

  As shown in FIG. 1, a vacuum circuit breaker 2 is movably installed on a floor plate 1 of a switchgear box. The vacuum circuit breaker 2 is mounted and fixed on a carriage 4 having wheels 3. Note that the wheel 3 on the left side of the drawing is indicated by a two-dot chain line because the members overlap each other. A screw receiving base 5 is fixed to the side surface of the front side of the carriage 4, and a rotatable access screw rod 6 provided with a trapezoidal screw is screwed together. The entrance / exit screw rod 6 passes through the reinforcing member 7 separated from the carriage 4, and the end 6 a is covered with a protective cover 8 having a U-shaped cross section. A handle (not shown) is fitted into the end portion 6a so that the screw rod 6 can be rotated. On the front side of the vacuum circuit breaker 2, an interlock pin 10 supported by a support plate 9 so as to be movable in the vertical direction is provided. The interlock pin 10 is disposed in a direction orthogonal to the axial direction of the access screw rod 6.

  As shown in FIG. 2, the access screw rod 6 is provided with a disconnecting position hole 20a into which the tip of the interlock pin 10 is fitted, a test position hole 20b, and a connection position hole 20c. The inner diameter of each hole 20 a, 20 b, 20 c is slightly larger than the outer diameter of the interlock pin 10. The depths of the holes 20a, 20b, and 20c are deeper than the thread valleys. The disconnect position hole 20a is a position where the vacuum circuit breaker 2 is disconnected from the main circuit, the test position hole 20b is a position where the operation of the vacuum circuit breaker 2 is tested, and the connection position hole 20c is a position where the main circuit is connected. The interlock pin 10 is provided with a pressurizing spring 21 urged to press the pin 10 against the entrance / exit screw rod 6 side. Further, a return lever 22 for lifting the interlock pin 10 is provided.

  A front door 12 fixed to the box is provided on the front side of the box, and the handle is fitted from the opening 12a with the front door 12 closed.

  Next, the operation will be described with reference to FIG. As shown in FIG. 3A, the return lever 22 is operated to lift the interlock pin 10 to remove it from the disconnection position hole 20a, and the access screw rod 6 is rotated. Then, the carriage 4 can be moved to the test position in the right direction as shown in FIG. During the movement, the return lever 22 is released, and the tip of the interlock pin 10 is brought into contact with the access screw rod 6 by the spring force of the pressure spring 21. When the test position is reached, the tip of the interlock pin 10 is fitted into the test position hole 20b by the spring force.

  For further movement, the return lever 22 is operated, the interlock pin 10 is removed from the test position hole 20b, and the access screw rod 6 is rotated. Then, as shown in FIG. 3C, the carriage 4 can be moved to the connection position in the right direction in the figure. During the movement, the return lever 22 is released, and the tip of the interlock pin 10 is brought into contact with the access screw rod 6 by the spring force of the pressure spring 21. When the connection position is reached, the tip of the interlock pin 10 is fitted into the connection position hole 20c by the spring force.

  Thereby, the interlock pin 10 can be easily fitted in the disconnection position hole 20a, the test position hole 20b, and the connection position hole 20c. The interlock pin 10 and the entrance / exit screw rod 6 are installed on the same carriage 4 and are not affected by the play associated with movement as in the prior art, and the movement of each part can be made highly accurate. . Moreover, since the front-end | tip of the interlock pin 10 moves on the screw of the entrance / exit screw rod 6 with the spring force of the pressurization spring 21, it can engage | insert reliably. It is more reliable than free fall, and positioning is easy.

  In addition, the diameter of the interlock pin 10 is made larger (about twice) than the thread pitch of the entrance / exit screw rod 6, so that it does not fall into the thread groove. Since the depth of each hole 20a, 20b, 20c is deeper than the valley of the screw, it is securely fitted. The spring force is set so as not to hinder the rotation of the screw rod 6 and the frictional resistance is reduced by applying lubricating oil. A wear-resistant metal is preferable at the tip of the entrance / exit screw rod 6 and the interlock pin 10.

  According to the interlock device of the lead-type power receiving / distributing device of the first embodiment, the disconnecting screw hole 6 is provided with the disconnection position hole 20a, the test position hole 20b, and the connection position hole 20c, and the tip of the interlock pin 10 at each position. , So that the positioning at each position can be facilitated.

  Next, an interlock device for a drawer-type power distribution device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged side view of the main part showing the configuration of the interlock device of the drawer-type power receiving / distributing device according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in that an interlock mechanism for controlling the opening / closing operation is provided. In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, a first link 23 and a second link 24 are connected to the interlock pin 10. In the first link 23, the vacuum circuit breaker 2 can be opened and closed when the interlock pin 10 is fitted in the holes 20a, 20b, and 20c. During movement, for example, a closing paddle (not shown) is covered with the first link 23 to make the opening / closing operation impossible. In the second link 24, when the vacuum circuit breaker 2 is closed, the interlock pin 10 cannot be lifted and cannot be moved.

  According to the interlock device for the drawer-type power receiving and distributing device of the second embodiment, in addition to the effect of the first embodiment, the interlock of the opening / closing operation of the vacuum circuit breaker 2 can be taken.

  According to the embodiment as described above, since the input / output screw rod provided with the disconnection position hole, the test position hole, and the connection position hole and the interlock pin fitted in the hole are provided in the same carriage, the accuracy is high. Assembling can be performed, and positioning of each can be performed easily.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Floor board 2 Vacuum circuit breaker 4 Carriage 5 Screw receiving stand 6 In / out screw rod 10 Interlock pin 11a, 20a Disconnection position hole 11b, 20b Test position hole 11c, 20c Connection position hole 21 Pressure spring

Claims (5)

Power distribution equipment,
A movable carriage on which the power receiving / distributing equipment is mounted;
A screw cradle fixed to the carriage;
A screw rod that is screwed into the screw cradle and moves the power receiving and distributing device; and
Disconnect position hole, test position hole, connection position hole provided in the access screw rod,
An interlock pin that is provided in the power receiving and distributing device, and has a tip fitted into the disconnection position hole, the test position hole, and the connection position hole;
An interlock device for a drawer-type power receiving / distributing device.   2. The interlock device for a drawer-type power distribution device according to claim 1, wherein a pressure spring is provided on the interlock pin, and a tip of the interlock pin is brought into contact with the input / output screw rod.   The interlock device of the lead-type power distribution / distribution device according to claim 1 or 2, wherein a diameter of the interlock pin is larger than a thread pitch of the access screw rod.   The interlock device for a drawer-type power receiving / distributing device according to any one of claims 1 to 3, wherein a link for controlling an opening / closing operation of the power receiving / distributing device is provided on the interlock pin.   The said power receiving / distributing apparatus is a vacuum circuit breaker, The interlock apparatus of the drawer type power receiving / distributing apparatus of any one of Claim 1 thru | or 4 characterized by the above-mentioned.

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