JPS6348718A - Switching operation stroke position detector for switch - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an opening/closing operation stroke position detection device for a switch, and in particular to a non-contact device for displaying opening/closing operations and diagnosing abnormalities during opening/closing operations. Regarding the improvements made.

(Prior art) Switches such as circuit breakers and disconnectors installed in gas-insulated switchgear are equipped with switch indicators and auxiliary switches in easily visible locations on the operating mechanism. It displays the operating status and provides information to the substation switchboard.

(Problems to be Solved by the Invention) These opening/closing indicators and auxiliary switches are configured to operate by being mechanically connected to the operating mechanism section. For this reason, as the number of operations of the gas insulated switch V24 increases, it may cause wear and tear on the mechanical connections, and the contacts of the auxiliary switch may become galled or oxidized, resulting in failure of continuity. be.

Furthermore, due to restrictions such as the number of switches that can be installed on switch indicators and auxiliary switches that are mechanically connected to the drive unit, it is not possible to obtain the large amount of information required to diagnose abnormalities during switch operation. There wasn't.

In order to solve these problems, a method of detecting the opening/closing stroke position of the opening/closing part of a switch without contact using a proximity sensor (Japanese Patent Application No. 61-45231, filed on March 4, 1986, ) has been proposed.

When applying an example of such a proposal to an actual device, installing a proximity sensor to an existing device would require improvements to the actuation mechanism itself, and work such as disassembling and removing the operation mechanism would be required on site. However, there were problems such as a significant increase in working time and the risk of disrupting the power supply.

The present invention has been made in consideration of the above points, and its purpose is to significantly shorten the work time for disassembling and removing the operating mechanism for installing the proximity sensor, and to open and close the operating mechanism without the risk of interfering with the power supply. An object of the present invention is to provide a device for detecting the stroke position of an opening/closing operation of a container.

[Structure of the invention]

(Means and operations for solving the problems) According to the present invention, to achieve this object.

Using bosses for measuring opening and closing operation strokes of the opening/closing operation stroke measuring section of the switch, proximity sensors are attached all at once to members that engage with these bosses.

By attaching it to the boss for measuring the opening/closing operation stroke, there is no need to modify the operating mechanism etc. on site.
The present invention is characterized by providing an opening/closing operation stroke position detecting device for a switch which is easily attachable and detachable.

(Example) Hereinafter, a device for detecting the opening/closing operation stroke position of a switch according to the present invention will be described with reference to FIGS. 1 to 3. In FIG. 3, a switch, for example a vertical circuit breaker 21, is connected to a tank 22.
An opening/closing operation stroke measuring section 23 is provided below. The new road section is provided at the front of the drawing in FIG. 3, and the blocking section is provided at the back (not shown). Hereinafter, this disconnection section will be referred to as, for example, the opening/closing operation stroke measuring section 23 of the opening/closing section. The tank 22 is also connected to an operating mechanism section 25, which is placed on a pedestal 27 having wheels 27a fixed on a rail 26, for example, and the tank 22a houses a connecting section of the operating mechanism of the disconnection section. It is being

As shown in FIG. 2, the opening/closing stroke measuring section 23 is located on the left side of the opening/closing stroke measuring boss 1 in gas, and on the right side in the atmosphere. The rod 2 moves to the left and right in the figure as the opening and closing operations are performed. Further, the rod 2 is slidably inserted into the guide 3 while maintaining a certain degree of airtightness, and a screw hole 2a is formed at one end of the rod 2. A measuring rod (not shown) is attached to this screw hole 2a when measuring the stroke. Furthermore, a cover 4 is fastened to the outside of the opening/closing operation stroke measurement boss 1, that is, on the atmosphere side, with bolts 5 via a sealing member 6 such as an O-ring.

In FIG. 1, the left side of the opening/closing operation stroke side chamber boss 1 is shown in gas, and the right side is shown in the atmosphere. As the switch is opened and closed, the rod 2 is inserted smoothly and airtightly by a guide 3 so as to be able to move quickly from side to side in the drawing. The position detector 7 is screwed into the threaded hole 2a at one end of the rod 2 via one side of the adapter 9. Then, the position detection body 7 is attached to the other side of the adapter 9 with bolts 8. Therefore, in conjunction with the opening/closing operation, the position detecting body 7 moves at high speed from side to side in the drawing. The flange 10 is attached to the boss 1 for measuring the opening/closing operation stroke by bolts 5 via a sealing member 6 such as an O-ring, and the flanges 10.11 are connected by studs 12. A cylindrical insulating member 13 is provided which is hermetically sealed with a backing 14.

The position detector 7 is housed in the cylindrical insulating member 13, and the flange 11 is airtightly covered with a backing 14.
Two non-contact type proximity sensors 15 are attached to the support plate 16 attached by 7 as shown in the figure.

Further, although the guide 3 has a structure that ensures airtightness inside the switch, high-pressure gas slightly leaks to the outside when the rod 2 moves at high speed. Therefore, the inside of the cylindrical insulating member 13 is filled with gas.

The position detecting body 7 is connected to the rod 2 of the opening/closing operation stroke measuring section 23, and as the opening/closing section is opened or closed, the position detecting body 7 moves in the horizontal left and right directions in the drawing. By the way, the rod 2 is installed in the gas, and until now, the cover 4 has been attached together with a sealing member 6 such as an O-ring, as shown in FIG. ing.

Therefore, in the opening/closing operation stroke position detecting device of the present invention, the position detector 7 is placed in the gas, and the proximity sensor 15 for detecting this is placed in the atmosphere. That is, the 5-position detector 7 is installed inside the cylindrical insulating member 13 filled with gas that slowly leaks from the airtight part of the guide 3, and the position detector 7 is installed outside the cylindrical insulating member 13 in the atmosphere. A non-contact type proximity sensor 15 is installed so as to be perpendicular to the moving direction of the sensor 7 .

By the way, this non-contact type proximity sensor 15 is, for example, a non-contact limit switch using a magnetic amplifier or a photoelectric type, and outputs an output when the position detecting body 7, which is an object to be detected, approaches to operate a relay. Also.

Some fast-response proximity sensors are sensitive to a single electrically conductive member made of non-magnetic material, but when such a proximity sensor is used, if a conductive member is used for the cylindrical insulating member 13, Since the conductive member is located closer to the sensor 15 than the position detector 7, the proximity sensor 1
5 will operate continuously, making it impossible to detect the position of the opening/closing operation stroke of the switch. Therefore, in the present invention, a cylindrical insulating member 13 made of synthetic resin such as polyester resin or nipoxy resin is used as a non-magnetic, non-conductive member.

By configuring as described above, the position detection body 7 moving in the gas can be moved without reducing the reliability of gas tightness.
Detection can be performed using the proximity sensor 15 on the atmospheric side. Also, flange 10°11, stud 12.
Proximity sensor 15. Support plate 16. Since the cylindrical insulating member 13 has an integral structure, it can be easily attached to the opening/closing operation stroke measurement boss 1, and the construction period and substation downtime are shortened.

Next, another embodiment of the present invention will be described with reference to FIGS. 4 and 5. The same parts or parts having the same functions as those in FIGS. 1 to 3 are given the same reference numerals. In FIG. 4, a lid 17 is airtightly attached to the flange 11 with bolts 17a via a sealing member 6 such as an O-ring.

As shown in FIG. 5, remove the lid 17 of the flange 11.

By attaching the measuring rod 19 to the position detector 7 attached to the rod 2 through a screw hole, a sliding contact 19a and a sliding resistor 19b are provided as in the conventional case, and the sliding resistor 19b is provided with a sliding contact 19a and a sliding resistor 19b. When a current is applied, the stroke on the movable side of the switch can be measured based on the sliding position of the sliding contact 19a that moves together with the measuring rod 19.

That is, conventional stroke measurement can be performed by removing M17. At this time, some gas leaks to the outside because it is only due to the sliding of the guide 3 and the rod 2, but this gas leakage does not pose a problem because the time is short.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to easily install the opening/closing operation stroke position detection device of a switch on-site without modifying the operation mechanism of the switch such as a circuit breaker or disconnector. .

Furthermore, it is possible to provide an opening/closing operation stroke position detection device for a switch that can perform stroke measurement in the conventional manner.

[Brief explanation of the drawing]

FIG. 1 is an opening/closing operation stroke position detection device for a switch according to the present invention, FIG. 2 is an opening/closing operation stroke measuring section for a switch according to the present invention, FIG. 3 is a side view of the switch according to the present invention, and FIG. FIG. 5 is a sectional view of another embodiment of the present invention. 1... Boss for measuring opening/closing operation stroke. 2...Rod, 2a...Screw hole, 3...Guide. 4...Cover, 5...Bolt, 6...Sealing member. 7... Position detection body, 13... Cylindrical insulating member. 14.1. Backing, 15... Proximity sensor. 16... Support plate, 17... Lid, 18... Cable. 19... Measuring rod. 23... Opening/closing operation stroke measuring section.

Claims (3)

[Claims] (1) An opening/closing operation stroke measuring section having a rod connected to the movable side of the opening/closing section is provided at one end of the tank of the switch, and the rod of the opening/closing operation stroke measuring section is connected to the position detection body, and the A non-contact type proximity sensor is provided that outputs an output in response to the movement of the position detecting body as the movable side moves, and a non-magnetic and non-conductive member is interposed between the position detecting body and the proximity sensor, and the An opening/closing operation stroke position detection device for a switch, characterized in that a portion to which a position detection body is attached has an airtight structure. (2) The opening/closing operation stroke position detecting device for a switch according to claim 1, wherein the non-magnetic and non-conductive member between the position detecting body and the proximity sensor is a cylindrical insulating member made of synthetic resin. (3) Opening/closing operation of the switch according to claim 1, wherein a lid is provided via a sealing member on a flange that is removably attached to the tip of the position detection body and that is opposite to the flange that is attached to the switch. Stroke position detection device.