JPH0679119U - Oil leak monitoring device for oil-filled electrical equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] A monitoring window for monitoring oil leakage from the pressure relief device attached to the oil-filled electrical equipment is installed in the pipe that connects the oil reservoir tank and the pressure relief equipment on the side of the electrical equipment. Even if the height of the monitoring window from the ground is restricted when installed, it is an object of the present invention to reduce the size of the entire device. [Structure] A lower end of a pipe connected to a pressure release device is inserted into an oil reservoir tank. The monitoring pipe is connected to a part of the inserted pipe. The tip of the monitoring pipe is led out to the outside of the oil reservoir tank, and a monitoring window is provided at the tip of the monitoring pipe led to the outside. Even if the height of the oil sump tank from the ground is increased, the monitoring window can be set to any height. By increasing this height, the depth of the oil sump tank can be made shallow. As a result, the size of the entire device can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil leakage monitoring device for oil-filled electrical equipment.

[0002]

[Prior art]

 In oil-filled electrical equipment such as transformers, shunt reactors, and capacitors, oil sump tanks will be prepared to prevent the expansion of gas, oil, etc. generated by internal accidents from flowing out into the premises. Normally, a pressure relief device is interposed between this oil reservoir tank and the oil-filled electrical equipment, and the pressure relief device is operated by the pressure that increases due to the occurrence of an internal accident, and the expanded gas and oil are stored in the oil reservoir tank. I try to flush it inside.

FIG. 2 shows the conventional configuration thereof, 1 is a tank of an oil-filled electric device or a soundproof wall, and 2 is an oil sump tank provided along the side wall of the tank or the soundproof wall 1. The tank 1 and the oil sump tank 2 are connected via a pipe 3, and a pressure relief device 4 is provided in the middle of the pipe 3. The pressure relief device 4 is provided with a pressure relief plate, and the middle of the pipe 3 is normally partitioned by this pressure relief plate.

When the pressure relief device 4 having such a configuration is provided in the pipe 3, it is necessary to monitor the oil leakage from the pressure relief device 4 due to a cause other than an internal accident. A monitoring window 5 for monitoring oil leakage is installed between the oil tank 4 and the oil sump tank 2. That is, the partition member 7 of a round bar is fixed to the inner wall surface of the pipe 6 between the pressure release device 4 and the oil sump tank 2 along its peripheral wall with a slight inclination. Then, the oil leaking and flowing from the pressure release device 4 along the inner wall surface of the pipe 6 is once partitioned by the partition member 7.

A part of the wall surface of the pipe 6 is opened, and one end of a monitoring pipe 9 for monitoring oil leakage is opened at this opening 8 and a monitoring window 5 is provided at the other end. The monitoring window 5 is composed of translucent glass and a flange that seals the periphery with a gasket, and the inside of the monitoring pipe 9 can be seen from the outside through the monitoring window 5. I can do it.

The oil once partitioned by the partition member 7 travels along the surface of the partition member 7 into the monitoring pipe 9, and the oil reservoir 1 between the wall surface of the pipe 6 and one end of the monitoring pipe 9 Enter within 0. Therefore, by observing the oil that has entered the oil reservoir 10 through the monitoring window 5, it is possible to know whether or not oil leakage from the pressure release device 4 has occurred.

However, when such a monitoring window 5 is provided in the pipe 6 that communicates with the upper surface of the oil sump tank 2, there are the following problems. That is, the monitoring window 5 must be at a height that can be seen by the operator. On the other hand, the volume of the oil sump tank 2 is determined by the amount of oil in the electric device 1.

Therefore, when a large-capacity oil reservoir tank 2 is required, in order to make the height of the monitoring window 5 a predetermined height, the height of the oil reservoir tank 2 from the ground should be too high. Inevitably, the depth must be deep in order to avoid it becoming too high. However, if the oil reservoir 2 with a deep depth is used, it will be projected from the side wall of the electric device 1 to that extent, and the size of the entire device will be increased.

[0009]

[Problems to be solved by the device]

 In the present invention, when a monitoring window for monitoring oil leakage from the pressure relief device attached to the oil-filled electrical equipment is installed in the pipe that connects the oil reservoir tank and the pressure relief equipment provided on the side of the electrical equipment, , Even if the height of the monitoring window from the ground is restricted, the purpose is to configure the oil storage tank without making it deep.

[0010]

[Means for Solving the Problems]

 According to the present invention, the lower end of the pipe connected to the pressure relief device is inserted into the oil reservoir tank, and a monitoring pipe for monitoring oil leakage is connected to a part of the inserted pipe, and the tip of the monitoring pipe is connected. It is characterized in that it is led out to the outside of the oil sump tank, and a monitoring window is provided at the tip of the monitoring pipe led out to the outside.

[0011]

[Action]

 Even if a monitoring window is provided in the monitoring pipe connected to the pipe by inserting the pipe communicating with the pressure relief device into the oil reservoir tank, the height position of the monitoring window from the ground Can be arbitrary. Therefore, even if the depth is shallow and the depth (length in the height direction) is deep so that the volume of the oil storage tank does not change, the monitoring window can be installed at a predetermined height. By making the depth of the oil reservoir tank shallow, the protruding length from the side of the electric device can be shortened, and the entire device can be made smaller.

[0012]

【Example】

 An embodiment of the present invention will be described with reference to FIG. In addition, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions. As described above, the pressure release device 4 is provided with the pressure release plate 11 and is interposed between the pipe 3 and the pipe 6. An insulating oil 12 communicates with the inside of the electric device 1. According to the present invention, the lower end of the pipe 6 is inserted even inside the oil sump tank 2.

Then, the monitoring pipe 9 is connected to the pipe 6 inserted into the oil reservoir tank 6, and the monitoring pipe 9 is led out from the side surface of the oil reservoir tank 2 to the outside. The installation of the monitoring window 5 at the tip of the derived monitoring pipe 9 is similar to the conventional configuration.

According to this structure, the connecting position of the monitoring pipe 9 to the pipe 6, that is, the height position of the monitoring window 5 is arbitrarily set according to the insertion length of the pipe 6 into the oil reservoir tank 2. Can be set. Therefore, even if the height of the oil sump tank 2 above the ground is sufficiently high, the monitoring window 5 can be installed at a predetermined height position.

As the height of the oil sump tank 2 above the ground is increased as described above, the depth of the oil sump tank 2 is reduced to obtain the same volume. If this depth becomes shallower, the protruding length from the side surface of the electric device 1 becomes shorter, and the entire device becomes smaller accordingly.

[0016]

[Effect of device]

 As described above in detail, according to the present invention, even if the monitoring window for monitoring the oil leakage from the pressure relief device is installed at any position from the ground, the oil reservoir tank with a shallow depth can be provided. It has the effect of being usable, and thus reducing the overall size of the device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Electrical Equipment 2 Oil Storage Tank 4 Pressure Release Device 5 Monitoring Window 6 Pipe 9 Monitoring Pipe

Claims (1)

[Scope of utility model registration request] 1. A lower end of a pipe connected to a pressure release device communicating with an oil-filled electrical device is inserted into an oil reservoir tank provided on a side surface of the oil-filled electrical device. A monitoring pipe for monitoring oil leakage is connected to a part of the pipe, the tip of the monitoring pipe is led to the outside of the oil reservoir tank, and the leading end of the derived monitoring pipe is
An oil leakage monitoring device for oil-filled electrical equipment, comprising a monitoring window for monitoring oil leakage from the pressure release device.