JP2010267520A - Operation check device for disconnector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation check device for a disconnector with improved detection accuracy of an opening and closing position of the disconnector by reducing an operating range of a magnetic proximity switch. <P>SOLUTION: A turntable 8 is horizontally fixed to a lower part of a main shaft 2 of the disconnector 1, an opening magnetic terminal 9 and a closing magnetic terminal 10 are mounted on both ends of a bottom surface of the turntable 8, and an opening magnetic proximity switch 12 and a closing magnetic proximity switch 13 are mounted on a pedestal 3 using a mounting stay 11 at respective positions immediately below the opening magnetic terminal 9 and the closing magnetic terminal 10 in a state where the disconnector 1 is opened and closed. The opening magnetic terminal 9 is configured such that an operation check magnet and an interlock magnet are adjacent to a protection case, and an iron piece is mounted on rear parts of the operation check magnet and the interlock magnet, and these are sealed. The opening magnetic proximity switch 12 is configured such that an operation check switch and an interlock switch are adjacent to the protection case, and these are sealed. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an operation check device for a disconnector that uses a magnetic proximity switch to check an open / close operation of the disconnector.

  As a conventional operation check device, a structure using a mechanical limit switch is known. In this technology, a rotating disk is fixed to the lower part of the main shaft for rotating the disconnector of the power transmission path, two position detection devices are attached to the rotating disk, and the position in the open and closed state of the disconnector is detected. Can be used to check the open / closed state.

  By the way, in the above technique, the detection accuracy of the opening / closing position is gradually lowered due to generation of rust in a mechanical part and attenuation of spring stress due to a severe environment, and the reliability is not satisfactory. On the other hand, a non-contact type operation confirmation device using a magnetic proximity switch is also known. However, since the magnetic proximity switch has a relatively wide magnetic field, the operation confirmation device may operate before the disconnector is completely turned to the open or closed position, and the detection accuracy is not satisfactory.

JP 2002-324464 A

  The problem to be solved by the present invention is to solve the problems of the prior art and reduce the operating range of the magnetic proximity switch to improve the detection accuracy of the open / close position of the disconnect switch. Is to provide.

The configuration of the present invention that solves this problem is as follows.
1) A rotating disk is fixed to the lower part of the main shaft for rotating the disconnector of the power transmission path, two magnets are attached to the rotating disk at a predetermined interval, and the nearest positions of the magnets when the disconnector is open and closed In the device for confirming the operation of the disconnector, the magnetic proximity switch is provided so that the open / close state of the disconnector can be confirmed by detecting the magnetism of the magnet close to the magnetic proximity switch. The operation check device for the disconnector, characterized in that the operating range of the magnetic proximity switch is reduced to increase the accuracy of the open / close position 2) The magnet and the magnetic proximity switch are each housed in a protective case and sealed 1) The disconnector operation confirmation device described in 1) 3) Two opening magnets and two magnetic proximity switches are provided close to each other, and one magnet and the magnetic proximity switch are used for operation confirmation, and the other magnet. In the disconnector according to 1) or 2), the magnetic proximity switch is used as an interlock for maintaining an open circuit state, and the magnets and the magnetic proximity switches are housed in a protective case and integrally sealed. Operation Confirming Device 4) The disconnection according to any one of the above 1) to 3), in which the vertically long lines that are marked on the side surfaces of the upper and lower protective cases are displayed in a straight line when the disconnector is open and closed In the device operation check device.

  According to the present invention, since the magnetic field of the magnet on the side facing the magnetic proximity switch is narrowed by the iron piece, the operating range of the magnetic proximity switch is reduced, and it is detected that the magnet is not close to the magnetic proximity switch on the same line. The detection accuracy of the open / close position of the disconnector is improved. Further, when the interlock magnets are adjacent to each other, the operation range of the magnetic proximity switch is narrow, so that it can be adjacent to the nearest position, and the apparatus can be downsized.

It is an external view of the disconnector of an Example. It is a front view of the operation check apparatus of an Example. It is explanatory drawing of the magnetic terminal and magnetic proximity switch of an Example. It is explanatory drawing which shows operation | movement of the operation confirmation apparatus of an Example. It is a comparison figure which shows the detection range of the magnetic proximity switch of an Example and a prior art example. It is a front view of the operation check apparatus of the other example of an Example. It is a right view of the operation check apparatus of the other example of an Example.

  In the present invention, when the magnet and the magnetic proximity switch are accommodated in the protective case and sealed, the attachment to the disconnector is facilitated, and the durability and water resistance are excellent. When the disconnector is in the open and closed state, if the vertically long lines that are marked on the side surfaces of the upper and lower protective cases are displayed in a straight line, the open / closed state can be easily confirmed visually. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 is an external view of the disconnector of the embodiment, FIG. 2 is a front view of the operation check device of the embodiment, FIG. 3 is an explanatory diagram of the magnetic terminal and the magnetic proximity switch of the embodiment, and FIG. 4 is an operation check device of the embodiment. FIG. 5 is a comparison diagram showing the detection range of the magnetic proximity switch of the embodiment and the conventional example.

  In the figure, 1 is a disconnector, 2 is a main shaft, 3 is a stand, 4 is a contact, 5 is a fixed contact, 6 is a lever, 7 is an operation check device, 8 is a rotating disk, 9 is a magnetic terminal for opening, 9a Is an operation confirmation magnet, 9b is an interlock magnet, 9c is an iron piece, 9d is a nut, 9e is a protective case, 10 is a magnetic terminal for closing, 10a is a line, 11 is a mounting stay, 12 is a magnetic proximity switch for opening, 12a is an operation confirmation switch, 12b is an interlock switch, 12c is a protective case, 12d is a line, 13 is a magnetic proximity switch for closing, and 13a is a line.

  As shown in FIGS. 1 and 2, the operation check device 7 of the present embodiment has a rotating disk 8 horizontally fixed to the lower part of the main shaft 2 of the disconnector 1, and an opening magnetic terminal at both ends of the lower surface of the rotating disk 8. 9 and a closing magnetic terminal 10 are attached, and an opening magnetic proximity switch 12 and a closing magnetic proximity switch 13 are attached immediately below the opening magnetic terminal 9 and the closing magnetic terminal 10 when the disconnector 1 is open and closed. The stay 11 is attached to the gantry 3.

  The open-circuit magnetic terminal 9 has an operation check magnet 9a and an interlock magnet 9b adjacent to a protective case 9e made of a corrosion-resistant aluminum alloy, and has a disk shape at the rear of the operation check magnet 9a and the interlock magnet 9b. Iron pieces 9c are arranged, and these are fixed and sealed with nuts 9d. The closing magnetic terminal 10 has the same structure as the opening magnetic terminal 9, but the interlock magnet is omitted.

  The opening magnetic proximity switch 12 has an operation check switch 12a and an interlock switch 12b sealed adjacent to a protective case 12c made of corrosion-resistant aluminum alloy. The closing magnetic proximity switch 13 has the same structure as that of the opening magnetic proximity switch 12, but the interlock switch is omitted. The clearance between the opening magnetic terminal 9 and the opening magnetic proximity switch 12 and between the closing magnetic terminal 10 and the closing magnetic proximity switch 13 is set to 5 mm.

  On the side surfaces of the protective case of the opening magnetic terminal 9, closing magnetic terminal 10, opening magnetic proximity switch 12, and closing magnetic proximity switch 13, a vertically long mark is provided when the disconnect device 1 is open and closed. The red lines 10a, 12d, and 13a (the line of the opening magnetic terminal 9 does not appear in the figure) are displayed so as to coincide with a straight line. As each magnetic proximity switch, a nitrogen-filled cylindrical magnetic proximity switch PSMS-RV type (product name) was used.

  In this embodiment, when the disconnector 1 rotates in the closing direction as shown in FIG. 4A, the closing magnetic terminal 10 approaches the closing magnetic proximity switch 13 as shown in FIG. Then, the closed state is confirmed. When the disconnector 1 rotates in the opening direction as shown in FIG. 4B, the opening magnetic terminal 9 comes close to the opening magnetic proximity switch 12 to detect magnetism, and the opening state is confirmed. At the same time, the interlock switch 12b is operated by the magnetism of the interlock magnet 9b, and the open circuit state is locked.

  As shown in FIG. 5, in this embodiment, the magnetic field of the magnet facing the magnetic proximity switch is narrow with an iron piece, so the operating range of the magnetic proximity switch is reduced, and the magnet is almost collinear with the magnetic proximity switch. If it does not come close to, it will not be detected, and the detection accuracy of the open / close position of the disconnector will be improved. In the conventional example having no iron piece, the operating point was 15 to 20 mm. However, in this example, the operating point was 3 to 5 mm and operated at the same position as the mechanical limit switch, and the operating point was greatly improved.

  FIGS. 6 and 7 show another example of the embodiment in which the operation check device of the present invention is attached to the grounding device. FIG. 6 is a front view of another example of the operation check apparatus according to the embodiment, and FIG. 7 is a right side view of another example of the operation check apparatus according to the embodiment. In the figure, 9f is a line, 14 is a grounding device, 15 is a support shaft, 16 is a grounding wire, and 17 is a mounting stay. In other respects, the reference numeral, the configuration, and the operational effects are the same as in the embodiment.

  The technology of the present invention is used in power plants, substations, and the like.

DESCRIPTION OF SYMBOLS 1 Disconnector 2 Spindle 3 Base 4 Contact 5 Fixed contact 6 Insulator 7 Operation check device 8 Turntable 9 Opening magnetic terminal 9a Operation check magnet 9b Interlock magnet 9c Iron piece 9d Nut 9e Protective case 9f Line 10 For circuit closing Magnetic Terminal 10a Line 11 Mounting Stay 12 Opening Magnetic Proximity Switch 12a Operation Check Switch 12b Interlock Switch 12c Protective Case 12d Line 13 Closing Magnetic Proximity Switch 13a Line 14 Grounding Device 15 Support Shaft 16 Grounding Line 17 Mounting Stay

Claims (4)

  A rotating disk is fixed to the lower part of the main shaft for rotating the disconnector of the power transmission path, two magnets are attached to the rotating disk at a predetermined interval, and the magnets are magnetized at the closest positions of the magnets when the disconnector is open and closed. In the operation check device for the disconnector, which is provided with a proximity switch, and the magnetic proximity switch detects the magnetism of the magnet close to the switch, so that the open / close state of the disconnector can be confirmed. A device for confirming the operation of a disconnector, wherein the operation range of the proximity switch is reduced to improve the accuracy of the open / close position.   2. The disconnector operation confirmation device according to claim 1, wherein the magnet and the magnetic proximity switch are each accommodated in a protective case and sealed.   Two magnets for magnetic opening and magnetic proximity switches are provided close to each other, one magnet and magnetic proximity switch are used for operation confirmation, and the other magnet and magnetic proximity switch are used for interlocking to maintain the open circuit state. The operation check device for a disconnector according to claim 1 or 2, wherein the magnets and the magnetic proximity switches are accommodated in a protective case and sealed together.   The operation check device for a disconnector according to any one of claims 1 to 3, wherein a vertically long line which is a mark on the side surfaces of the upper and lower protective cases is displayed so as to coincide with a straight line when the disconnector is open and closed.

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