JPH0717208Y2 - Gas insulated electrical equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gas-insulated electric device in which an insulating gas is filled in an internal space of a hermetically-sealed container containing electric parts.

Conventional technology For gas-insulated electrical equipment in which an insulating gas is enclosed in a closed container to achieve ground-to-ground and phase-to-phase insulation of circuit breakers, disconnectors, busbars, etc., when the moisture content of the insulating gas exceeds the allowable range, insulation There is a problem that the performance is significantly reduced. Therefore, the gas-insulated electric equipment is provided with the water adsorption means as shown in FIG. This moisture adsorbing means is one in which an opening 51 protruding outward is formed in a closed container 50, and a container 54 accommodating an adsorbent 53 is fixed to the back surface of a lid 52 that closes the opening 51. The container 54 is formed with an opening 55 through which the insulating gas in the closed container 50 can flow, and the moisture in the insulating gas is adsorbed by the adsorbent 53 made of zeolite or the like, and the moisture content of the insulating gas is within an allowable range. It is kept below.

Problems to be Solved by the Invention In the above-mentioned conventional example, the adsorbent 53 absorbs moisture to some extent, and therefore the adsorbing ability deteriorates. Therefore, it is necessary to periodically remove the lid 52 and replace the adsorbent 53 in the container 54. . However, when replacing the adsorbent 53 in the conventional example, there is a problem that when the lid 52 is removed, the insulating gas in the closed container 50 flows out and external air is mixed into the insulating gas. . If a large amount of insulating gas flows out, the insulating gas must be reinjected. When the insulating gas is reinjected, the amount of insulating gas used increases and
Since it takes time to re-inject the insulating gas and the energization stop period becomes long, there is a problem that a large loss occurs on the load side, and it is desired to reduce the number of times of re-injecting the insulating gas.

An object of the present invention is to provide a gas-insulated electric device which is easy to work and in which the loss of insulating gas is reduced.

Means for Solving the Problems A gas-insulated electric device of the present invention is a gas-insulated electric device in which an insulating gas is enclosed in an internal space of a hermetically-sealed container containing electric parts, and an opening provided on a side wall of the hermetically-sealed container. , A pair of O's mounted in a cylindrical portion provided in the opening and a pair of peripheral grooves formed at a predetermined interval on the inner peripheral surface of the cylindrical portion.
A ring, an adsorbent-filled cylinder that has end plates at both ends and that penetrates the cylindrical portion so that the outer peripheral surface is inscribed in the pair of O-rings, and the adsorbent-filled cylinder is pushed in A fixture that is fixed to the side wall, and is located inside the airtight container with the adsorbent-filled cylinder being pushed in, and is located outside the airtight container with the adsorbent-filled cylinder being pulled out. The axial length is the same as the pair of O
It is provided with an adsorbent filling / extracting port formed on the peripheral wall of the adsorbent filling cylinder so as to be shorter than the ring interval.

Operation According to the configuration of the present invention, the adsorbent replacement work can be performed as follows. First, pull out the adsorbent filling cylinder to the position where the adsorbent filling / extracting port reaches the outside of the closed container, and rotate it to insert / insert the adsorbent placed outside the closed container.
Unnecessary adsorbent is taken out with the outlet facing downward. Then, the adsorbent filling cylinder is rotated, the adsorbent filling / extracting port is directed upward, and a new adsorbent is filled in the adsorbent filling cylinder, and the adsorbent filling / extracting port is placed inside the closed container until the adsorbent is filled. Push the filling cylinder inward and fix it in the closed container with a fixture. Therefore, the work of replacing the adsorbent becomes very easy, and even if the work of pulling out / pushing the adsorbent-filled cylinder is performed, the O-ring keeps the airtightness of the airtight container, and the loss of the insulating gas is reduced. Since it only needs to be filled in the filling cylinder, the loss is extremely small.

Embodiment FIG. 1 is a sectional view showing the structure of an embodiment of the present invention. The gas-insulated electrical equipment of this embodiment has an opening 1b provided in the side wall 1a of the closed container 1 and a cylindrical portion provided in the opening 1b.
1c, a pair of O-rings 2 and 3 mounted in a pair of circumferential grooves 1d and 1e formed on the inner peripheral surface of the cylindrical portion 1c at a predetermined interval,
The end plates 4a and 4b are provided at both ends, and the outer peripheral surface 4c has the pair of O-rings.
An adsorbent-filled cylinder 4 penetrating through the cylindrical portion 1c so as to be inscribed in the second and third parts so that the adsorbent-filled cylinder 4 is pushed in and fixed to the side wall 1a; It is located inside the closed container 1 with the adsorbent-filled cylinder 4 pushed in, and is located outside the closed container 1 with the adsorbent-filled cylinder 4 pulled out and the length L ₁ in the cylinder axis direction. Is shorter than the interval L ₂ between the pair of O-rings 2 and 3 and is formed in the cylindrical portion 4d of the adsorbent filling cylinder 4 with an adsorbent filling / extracting port 4e.

In this embodiment, the closed container 1 is an electric component (not shown).
The inside space 1f is filled with insulating gas. An adsorbent-filled cylinder 4 is provided at the outer end of a cylindrical portion 1c provided so as to vertically project outward from the side wall 1a of the closed container 1.
A flange portion 1h having an insertion hole 1g through which the bolt of the fixture 5 is inserted is formed to facilitate fixing.

The adsorbent-filled cylinder 4 has an external appearance as shown in the second, and the length L of the cylindrical portion is set to 2l + L ₁ or more, where the length of the cylindrical portion 1c of the closed container 1 is ₁ . . Further, as shown in FIG. 1, the arrangement position of the adsorbent filling / extracting port 4e is set so as to come inside the closed container 4 with the adsorbent filling cylinder 4 fixed. With this setting, the granular adsorbent 6 filled in the adsorbent filling cylinder 4 can be taken out as shown in FIG. 4 can be filled. A locking plate 7 is screwed into the inner end plate 4a of the adsorbent-filled cylinder 4, and an insertion hole 4f through which the bolt of the fixture 5 is inserted is provided in the outer end plate 4b. The shape of the outer end plate 4b is set to the same size as the flange portion 1h so that the adsorbent filling cylinder 4 can be easily fixed to the closed container 1.

Next, the replacement operation of the adsorbent 6 will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, when the fixture 5 is removed, the adsorbent-filled cylinder 4 can be pulled out. In this pull-out operation, at least one O-ring 2,
3 is completely pressed against the outer peripheral surface 4c of the adsorbent-filled cylinder 4,
The airtightness of the closed container 1 is always maintained. As shown in FIG. 4, when the locking plate 7 is pulled out until it comes into contact with the side wall 1a of the closed container 1, the adsorbent filling / extracting port 4e is arranged outside the closed container 1 and the adsorbent filling cylinder 4 is rotated. , Adsorbent filling / outlet 4e
Is directed downward, the adsorbent 6 spontaneously falls and is taken out. At this time, since the locking plate 7 is in contact with the side wall 1a, the adsorbent filling cylinder 4 does not pop out due to the pressure of the insulating gas. The adsorbent 6 is filled by rotating the adsorbent filling cylinder 4 with the adsorbent filling / extracting port 4e facing upward. When the filling of the adsorbent 6 is completed, the adsorbent filling cylinder 4 is pushed inward, and the adsorbent filling cylinder 4 is fixed to the closed container 1 by the fixture 5, whereby the replacement work of the filler 6 is completed.

As described above, in this embodiment, since the replacement work of the adsorbent 6 can be easily performed in a short time, the labor for this work can be largely saved. Further, since the airtightness of the closed container 1 is always maintained during the replacement work of the adsorbent 6, a large amount of insulating gas does not flow out, so that it is not necessary to re-inject the insulating gas for this work, and the usage cost of the insulating gas is reduced. The power consumption can be greatly reduced, and it is not necessary to stop the power supply for this work.

In the above-described embodiment, the engaging plate 7 is attached to the adsorbent filling cylinder 4 so that the adsorbent filling cylinder 4 does not pop out due to the pressure of the insulating gas during the replacement work of the adsorbent 6. It is also possible for an operator to hold the agent filling cylinder 4 so that it does not pop out, and in the present invention, the locking plate 7 may not be particularly provided. Further, in the above-described embodiment, the cylindrical portion 1c is provided so as to project outward from the side wall 1a.
It may be provided so as to project inward from 1a. The adsorbent 6 used in this invention is not limited to one that adsorbs only water,
It also includes those that adsorb impurities in the insulating gas.

Effect of the Invention According to the gas-insulated electric device of the present invention, the fixing tool is removed, the adsorbent-filled cylinder is pulled outward, and the adsorbent is loaded with the adsorbent filling / extracting port facing downward, and the adsorbent is filled / removed. After filling the adsorbent with the outlet facing upward, push the adsorbent-filling cylinder and fix it with the fixture.The adsorbent can be replaced with a very easy operation, and the adsorption in the adsorbent replacement work Even when the agent-filled cylinder is pulled out / pushed in, the airtightness of the closed container is always maintained by the O-ring, so that the loss of insulating gas is extremely reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view showing the external appearance of the adsorbent-filled cylinder, FIGS. 3 and 4 are views for explaining the adsorbent replacement operation, and FIG. 5 is a sectional view showing the structure of a conventional example. 1 ... closed container, 1a ... side wall, 1b ... opening, 1c ... cylindrical part, 1d, 1e ... circumferential groove, 2,3 ... O ring, 4 ... adsorbent filling cylinder, 4a, 4b …… End plate, 4c …… Outer peripheral surface, 4d …… Cylinder part, 4e …… Adsorbent filling / extracting port, 5 …… Fixing tool, 6 ……
filler

Claims (1)

[Scope of utility model registration request] 1. A gas-insulated electric device in which an insulating gas is enclosed in an internal space of a hermetically-sealed container containing electric parts, an opening provided on a side wall of the hermetically-sealed container, a cylindrical part provided at the opening, and A pair of O-rings mounted in a pair of circumferential grooves formed at a predetermined interval on the inner peripheral surface of the cylindrical portion and end plates at both ends, and the outer peripheral surface is inscribed in the pair of O-rings. Adsorbent-filling cylinder that penetrates the part so that it can be pushed and pulled out freely, a fixture that fixes the adsorbent-filling cylinder to the side wall in the pushed-in state, and the adsorbent-filled barrel in the closed container while it is pushed in. Formed on the peripheral wall of the adsorbent-filled cylinder such that the adsorbent-filled cylinder is positioned and is located outside the airtight container in a state where the adsorbent-filled cylinder is pulled out and the axial length of the cylinder is shorter than the interval between the pair of O-rings With adsorbent filling / outlet It is insulated electrical equipment.