JPH0721214Y2 - Hygroscopic reservoir - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture absorbent reservoir for obtaining dry air, and can be used in, for example, a power transformer or an insulating oil tank.

[0002]

2. Description of the Related Art In a power transformer, air slightly flows in and out of a housing due to temperature changes and the like, but water contained in the incoming air is mixed with insulating oil. In order to prevent this, silica is used to remove the moisture in the incoming air.

A conventionally used silica gel reservoir will be described with reference to FIG. 1. This apparatus has a cylindrical container 1 and a silica gel 2 is housed inside. The tubular container 1 is composed of a transparent glass tube 3, an upper lid 4 and a lower lid 5. Reference numeral 6 is a rod that connects the upper and lower lids.

The upper lid 4 has a silica gel charging port 7 and the lower lid 5 has a discharging port 8, both of which are normally closed by stoppers 7a and 8a. Reference numeral 9 is an inclined plate made of wire mesh. The pipe 10 led from the transformer is connected to the connection port 11 of the upper lid.

A breather 12 is added to the lower lid 5. Breather has two independent reservoirs 13,1
4 and an intake pipe 15 and an exhaust pipe 16 extending from the lower lid 5 into the corresponding liquid reservoirs. Liquid pool 1
The sealing liquid 19 is stored at the same level in the Nos. 3 and 14. The intake pipe 15 communicates with the inner lower portion of the cylindrical container through a hole 17 formed in the lower lid 5. The exhaust pipe 16 communicates with the upper space inside the tubular container through a pipe 18 that stands at the center of the tubular container 1.

With such a configuration, when the transformer and therefore the container 1 internal pressure rises as the temperature rises, the sealing liquid 19 in the exhaust pipe 16 is pushed down, and the air passes through the pipe 18 and the exhaust pipe 16. And go out. On the contrary, when the internal pressure of the transformer and thus of the reservoir decreases as the temperature decreases, the sealing liquid 19 of the liquid reservoir 13
Are sucked up into the intake pipe 15, and outside air enters the lower part of the reservoir through the intake pipe 15 and the hole 17. Instead, the dry air previously in the reservoir is drawn into the transformer.

When breathing is repeated in this manner, the hygroscopic capacity of silica gel eventually declines. The decrease in hygroscopic capacity of silica gel begins with the silica gel at the bottom of the container and gradually extends to the silica gel at the top. The fact that the silica gel loses its ability to absorb moisture can be determined by the color change (blue to red) of the silica gel. When changing the silica gel, the stopper 8a is opened and the silica gel in the discharge port 8 is discharged.

By the way, the replacement of silica gel is not normally carried out after all the silica gel in the container loses its hygroscopic ability, but is carried out early with a margin. That is, when the silica gel is replaced, the silica gel having a hygroscopic capacity still remains above the container.

However, when the discharge port 8 at the bottom of the container is opened, the silica gel below does not come out in order, but the upper and lower ones are discharged in a complicated mixture, so only the discolored silica gel is discharged. You cannot do it. For this reason, conventionally, it was unavoidable to discharge all the silica gel from the container and refill a new one.

[00010]

In order to eliminate such waste, the present invention proposes a hygroscopic agent reservoir capable of leaving the hygroscopic agent having the hygroscopic ability at the upper part of the container and discharging the one having lost the hygroscopic property at the lower part of the container. The purpose is to provide.

[0011]

A hygroscopic agent reservoir of the present invention is a vertically long tubular container through which gas is filled with a granular hygroscopic agent, for example, silica gel. A partition plate with spiral cuts is provided for partitioning. A string is tied to the central portion of the partition plate, and when the string is pulled from the outside of the container in the axial direction of the container, the partition plate expands in a spiral shape.

The structure is simplified if one end of the cord is connected to a plug of the hygroscopic agent inlet port opened in the upper part of the container.

[0013]

In the reservoir of the present invention, when replacing the hygroscopic agent, first, the drain port at the bottom of the container is opened, and the hygroscopic agent below the partition plate is discharged. Then, the outlet is closed and the string extending from the partition plate is pulled. Then, the partition plate opens spirally, and the hygroscopic agent on the partition plate falls below the container. In this way, new hygroscopic agent is replenished from the charging port at the top of the container.

[00014]

EXAMPLE A partition plate 20 for partitioning the interior into upper and lower parts is provided in the silica gel reservoir shown in FIG. 2,
As shown in FIG. 3, the partition plate 20 is a thin plastic plate having many small holes, and has spiral cuts. The partition plate 20 actually sits on a support frame 21 attached to the pipe 18, the periphery of which is fixed to the support frame. It should be noted that the partition plate 20 is attached to a level of about two thirds of the height of the container.

A string 22 is tied to the center of the partition plate 20, and the root of the string is tied to the back of the stopper 7a. Reference numeral 23 is a string guide.

The replacement of the silica gel is carried out when the entire silica gel below the partition plate 20 is discolored. When the plug 8a is removed and the discharge port 8 is opened, the silica gel 2 is discharged from the discharge port, but the silica gel above the partition plate 20 (which is not discolored yet) is blocked by the partition plate and falls down. Absent.

When the silica gel under the partition plate 20 has been discharged, the discharge port 8 is closed, the upper stopper 7a is removed, and the string 2
Subtract 2. Then, the partition plate spirally opens as shown in FIG. 3, and the silica gel drops downward and collects on the bottom of the container. Next, new silica gel is put in through the inlet 7 to fill the inside of the container with silica gel, and the stopper 7a is closed to complete the exchange.

[0018]

As described above, since the hygroscopic agent reservoir of the present invention is provided with the partition plate which expands in a spiral shape when the string is pulled, the hygroscopic agent reservoir does not have to wait until all the hygroscopic agent loses its hygroscopic power. If the silica gel is replaced early, there is an effect that the silica gel having a moisture absorption capacity, which remains on the upper portion of the reservoir, is not wasted.

If one end of the string is connected to the stopper of the hygroscopic agent input port opened in the upper part of the container, the string can be pulled by opening the stopper, and the structure is extremely simple.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a silica gel reservoir.

FIG. 2 is an assembly drawing of a partition plate.

FIG. 3 is a perspective view showing a state where a partition plate is opened.

[Explanation of symbols]

 1 Cylindrical container 2 Hygroscopic agent (silica gel) 7 Input port 7a Plug 20 Partition plate 22 String

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Eiji Takahashi Eiji Takahashi 253, Kashima, Furukawa, Furukawa City, Miyagi Prefecture Tohoku Electric Power Co., Inc., Miyagi Branch, Furukawa Technical Center (72) Akira Ogasawara, Kashima, Furukawa City, Furukawa, Miyagi Prefecture 253 Tohoku Electric Power Co., Inc., Miyagi Branch, Furukawa Technology Center (72) Inventor: Takashi Kawajiri Honkashima, Furukawa City, Furukawa City, Miyagi Prefecture 253 Tohoku Electric Power Co., Miyagi Branch, Furukawa Technology Center (72) Creator Shinichi Takahashi, Miyagi 253 Motoshima, Furukawa, Furukawa City, Tohoku Electric Power Co., Inc. Miyagi Branch, Furukawa Technical Center

Claims (2)

[Scope of utility model registration request] 1. A hygroscopic agent reservoir in which a granular hygroscopic agent (2) is packed in a vertically long cylindrical container (1) through which gas passes,
A partition plate (20) that divides the interior of the container into upper and lower parts and is provided with a spiral cut is provided, and a string (2) is provided at the center of the partition plate.
2) is tied together, and the hygroscopic agent reservoir is configured so that when the string is pulled upward from the outside of the container, the partition plate expands in a spiral shape. 2. The hygroscopic agent reservoir according to claim 1, wherein one end of the string is connected to a plug (7a) of a hygroscopic agent input port (7) opened in an upper portion of the container.