JPS6012253Y2 - Pressure release confirmation device for oil-filled appliances - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pressure release confirmation device for storing insulating oil of an oil-filled electrical appliance into a drain oil tank via an oil drain pipe connected to a pressure relief device when an electrical appliance malfunctions.

In recent years, various measures have been taken for oil-filled electrical appliances from the viewpoint of environmental protection.

For example, as shown in Figure 1, when the internal pressure of an oil-filled electrical appliance 1 becomes abnormally high and the pressure relief device 2 is activated, the insulating oil inside the oil-filled electrical appliance 1 will spray out. In order to prevent the insulating oil from scattering around, the pressure relief device 2 is connected to a drain oil tank 4 via an oil drain pipe 3, and the insulating oil is stored in the drain oil tank 4.

The drain oil tank 4 is generally buried in the ground, and is equipped with an exhaust pipe 4a.

In this case, the pressure relief device 2 may malfunction due to its structure and cannot be expected to be completely reliable, so even if the pressure relief device 2 were to operate, it may be due to an abnormality inside the oil-filled electrical appliance 1 or malfunction. You need to check first.

In the case of the above-mentioned structure, the only way to confirm whether or not the oil is injected is through the sight glass of the pressure relief device 2 or by removing the exhaust pipe 4a of the drain oil tank 4 and looking inside.

However, the removal of the pressure relief device 2 and the exhaust pipe 4a requires a surprising amount of time and effort because the pressure relief device 2 is located at a fairly high position and the removal work is troublesome.

Therefore, in view of the above-mentioned shortcomings, the present invention was devised based on a novel idea with the aim of providing a pressure release confirmation device for oil-filled electrical appliances that easily confirms the normal operation or malfunction of the pressure relief device 2. It is.

In order to achieve this objective, the present invention is such that a pressure relief device for an oil-filled electric appliance is connected to an oil drain tank via an oil drain pipe, and one end is connected to a pointer and the other end is cantilevered across the oil drain pipe. A shaft supported by the oil drain pipe is rotatably attached to a visible position in the middle of the oil drain pipe, and a spatula having a size that blocks half of the oil drain pipe is fixed to the shaft, and the spatula is configured to block the oil drain pipe. A thin spiral spring that rotatably supports the shaft is attached to the shaft, and when a predetermined force is applied to the spatula and the shaft rotates against the spiral spring, the spatula attaches to the pipe shaft of the oil drain pipe. Here, an embodiment of the present invention will be described with reference to FIGS. 2 to 4.

In the description of the present embodiment shown in FIG. 2 and subsequent figures, the same parts as in FIG. 1 are given the same reference numerals.

In FIG. 2, a jet flow detector 5 surrounded by a broken line is provided at a visible height in the middle of the oil drain pipe 3.

This jet detector 5 is attached to a protruding part of the oil drain pipe 3 as shown in FIG. It is movably mounted.

A semicircular spatula 5b is fixed to the shaft 5a, and the spatula 5b has a size that blocks half of the oil drain pipe 3.

The base end of the shaft 5a is connected to the pointer of the display section 5c shown in FIG. ing.

Further, at the bottom of the display section 5c, there is a terminal box 5d for displaying the operation of the pointer on a monitoring panel (not shown).

The shaft 5a is provided with a thin coiled spring 5e, which is located inside the oil drain pipe 3 and holds the shaft 5a horizontally, as shown in FIG. has been done.

This attraction plate 5f is fixed and protrudes in the same direction as the spatula 5b, and is adapted to attract the permanent magnet 5g when the shaft 5a rotates.

Therefore, the permanent magnet 5g and the attraction plate 5f attract each other against the biasing force of the thinly wound spring 5e, which has one end fixed to the shaft 5a and the other end fixed to, for example, the case.

When the permanent magnet 5g and the adsorption plate 5f are attracted to each other, the pointer on the display section 5c is held at 1 jet, and the pointer is returned to the 1st direction during operation by manually rotating the shaft 5a. .

In such a configuration, when the oil-filled electrical appliance 1 is operating normally, the pointer on the display section 5c points to ``During operation 1'', and the thin coil spring 5
The spatula 5b blocks the oil drain pipe 3 due to the biasing force e.

When the oil-filled electrical appliance 1 is operating abnormally, the insulating oil that has activated the pressure relief device 2 is discharged into the oil drain tank 4 through the oil drain pipe 3.

At this time, the spatula 5b of the jet flow detector 5 is applied with insulating oil as shown in FIG. Then, the pointer on the display section 5c reaches 1 jet.

The position of the spatula 5b in this one-jet state is shown by the broken line in FIG. 4a.

Furthermore, changes in the pointer may be displayed on the monitoring panel at the same time.

As explained in the embodiments above, according to the present invention, a rotatable shaft is installed in the middle of the oil drain pipe and crosses the oil drain pipe, and a spatula of a size that blocks half of the oil drain pipe is fixed to this shaft. ,
When a predetermined force is applied to the spatula blocking the oil drain pipe, the shaft rotates and aligns the spatula with the axis of the oil drain pipe, thereby removing jets caused by abnormalities in oil-filled appliances from the outside. It can be easily confirmed.

Normal operation or malfunction of the pressure relief device can be easily determined based on the operation of the jet flow detector.

Therefore, there is no longer any troublesome checking work that was required in the past.

[Brief explanation of drawings]

Figure 1 is a simplified configuration diagram of an oil-filled appliance equipped with a conventional pressure relief device, Figures 2 to 4 are an embodiment of the pressure relief confirmation device for an oil-filled appliance according to the present invention, and Figure 2 shows a jet flow. A simplified configuration diagram of an oil-filled electric device equipped with a detector, Figure 3 is a simplified configuration diagram of a jet flow detector,
FIG. 4A is a state diagram showing the operating state of the spatula, FIG. 4 is a configuration diagram showing an example of the display section, and FIG. 4C is a perspective view showing the main parts of the jet flow detector. In the drawing, 1 is an oil-filled electrical appliance, 2 is a pressure relief device, 3 is an oil drain pipe, and 4
5a is a shaft, and 5b is a spatula.

Claims (1)

[Scope of utility model registration request] In a device in which a pressure relief device for an oil-filled appliance is connected to an oil drain tank via an oil drain pipe, a shaft whose one end is connected to a pointer and whose other end is supported in a cantilevered manner across the oil drain pipe is attached midway through the oil drain pipe. A spatula of a size that blocks half of the oil drain pipe is fixed to the shaft, and a thin coiled spring is rotatably supported on the shaft so that the spatula blocks the oil drain pipe. The spatula is attached to the shaft and further includes magnetic attraction means for maintaining the spatula along the pipe axis of the oil drain pipe when a predetermined force is applied to the spatula and the shaft rotates against the thinly coiled spring. A pressure release confirmation device for oil-filled electrical appliances.