JPH1014036A - Gas recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economically superb gas recovery device that is miniaturized, eliminates the need for using a large-scale device, simplifies carry-in/out operation, and can recover gas efficiently. SOLUTION: A pipe 2 for allowing gas to flow from a gas sealing structure 1 to a gas recovery container 5 unit the gas pressure of the gas sealing structure 1 and that of the gas recovery container 5 are balanced each other is connected to the gas sealing structure 1 and the gas recovery container 5. Also, a vacuum pump 4 for recovering gas in the gas sealing structure 1 into the gas recovery container 5 is connected to the pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improved gas recovery apparatus for recovering gas from a gas-filled structure such as a gas-insulated device.

[0002]

2. Description of the Related Art Generally, a gas insulating device for indoor installation such as an underground substation is composed of a gas sealing structure in which gas is sealed in a closed container. When installing, repairing, or inspecting such a gas-enclosed structure, it is necessary to extract gas from the gas-enclosed structure and collect the gas in a gas collection container.

Therefore, a gas recovery device for recovering gas from a gas-filled structure has been conventionally known. For example, FIG.
The gas recovery apparatus shown in FIG. 6 includes a gas recovery compressor 12 and a gas storage cartridge 1 serving as a gas recovery container.
3 and is used when recovering gas from gas-insulated equipment at underground substations. When the compressor 12 and the gas storage curdle 13 are carried into the underground substation, the machine hatch 1 provided on the ground is first used.
0 is released, and it is carried into a predetermined space in the underground substation from here using the tow truck 11. The loaded compressor 12 is connected to the gas-filled structure 1 by the pipe 2. Then, when pressure is applied to the gas in the gas sealing structure 1 by the action of the compressor 12, the gas is liquefied and sealed in the gas storage curdle 13 from the compressor 12.

[0004]

However, the conventional gas recovery apparatus as described above has the following problems. That is, the gas recovery compressor 12 and the gas storage curdle 13 are large in weight and shape, and require a large occupied space. Therefore, in a limited space such as an underground substation, not only the workability of the gas recovery operation itself is low, but also troubles in other operations may occur. Further, when the compressor 12 and the gas storage curdle 13 are carried in and out of the underground substation, the machine hatch 10 on the ground must be opened, which requires a great deal of time and cost, and is economically disadvantageous. there were.

[0005] In general, with regard to a gas recovery operation performed in a narrow space such as an underground substation, not only operability but also safety must be ensured. Therefore, improvement of workability and safety is always required for the gas recovery device.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above problems, and its main purpose is to reduce the size of the apparatus and simplify the carrying-in / out operation without using a large-scale apparatus. It is an object of the present invention to provide an economically excellent gas recovery apparatus that can be used to recover gas with high efficiency.

Another object of the present invention is to provide a gas recovery device which improves workability and safety.

[0008]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a gas is extracted from a gas-filled structure in which a gas is sealed in a sealed container, and the gas is removed from the gas-filled structure. In a gas recovery device for recovering a gas into a gas recovery container having a lower pressure than a gas, the gas-filled structure is connected to the gas recovery container, and the gas pressure of the gas-filled structure and the gas pressure of the gas recovery container are mutually balanced. And a pipe through which the gas flows from the gas-encapsulated structure to the gas recovery container until the intake side is connected to the gas-enclosed structure, and the exhaust side is connected to the gas collection container, respectively. A vacuum pump for collecting gas in the gas recovery container.

According to a second aspect of the present invention, in the gas recovery apparatus according to the first aspect, the gas recovery container is constituted by a deformable container.

According to a third aspect of the present invention, in the gas recovery apparatus according to the first or second aspect, a detecting means for detecting a gas state is attached to the pipe.

According to the first aspect of the present invention, the gas flows from the gas filling structure into the gas recovery container through the pipe until the gas pressures of the two are balanced. This makes it possible to easily recover gas from the gas-enclosed structure into the gas-recovery container without using a special device such as a compressor or cylinder until the gas pressure between the gas-enclosed structure and the gas recovery container reaches equilibrium. it can. Therefore, the size of the gas recovery device can be reduced. As a result,
Even if the gas recovery device is installed in a limited space such as an underground substation, other work is not hindered, and excellent workability can be exhibited. After the gas pressures of the gas filled structure and the gas recovery container reach equilibrium, the gas can be completely recovered from the gas filled structure to the gas recovery container by operating the vacuum pump.

According to the second aspect of the present invention, since the gas recovery container is deformable, if it is crushed and miniaturized, it can be easily carried into a narrow space such as in an underground substation. In addition, since it can be crushed until it is used, the occupied space can be reduced. Further, if the size and shape of the gas recovery container in which the gas is sealed are adjusted to the entrance and exit of the operator, the operator can easily carry out the gas recovery container from this entrance and exit even after gas recovery. Therefore, there is no need to open a machine hatch on the ground and to carry in / out a device such as a crane. In addition, since the gas recovery amount can be visually confirmed by the deformation state of the gas recovery container, it is possible to prevent the gas recovery container from bursting due to overfilling.

According to the third aspect of the present invention, since the detecting means detects the state of the gas in the pipe, the state of the gas being collected can be accurately grasped. Therefore, it is possible to prevent a gas leakage accident, a gas collection container rupture accident, and the like, and it is possible to ensure excellent safety.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. Note that the same members as those in the conventional example shown in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted.

(1) First Embodiment—See FIG. 1 The first embodiment corresponds to the first aspect of the present invention, and is provided with a gas recovery container 5 that is evacuated. This gas recovery container 5 is provided with a gas-filled structure 1 through a pipe 2.
Is connected. The pipe 2 is provided with valves 3 a and 3 b and a vacuum pump 4. When the valve 3 a is “opened” and the valve 3 b is “closed”, the pipe 2 allows gas to flow from the former to the latter due to the pressure difference between the gas-filled structure 1 and the gas recovery container 5. . The vacuum pump 4 is connected to the gas-filled structure 1 on the suction side and connected to the gas recovery container 5 on the exhaust side, and closes the valve 3a.
It operates when the valve 3b is opened.

In the first embodiment having the above-described configuration, first, the valve 3a is opened and the valve 3b is closed, and gas is charged through the pipe 2 until the gas pressures of the two are balanced. Gas flows from the structure 1 into the gas recovery container 5. The inflow of such gas stops when the differential pressure disappears and the two gas pressures are balanced. And the gas filled structure 1
After the gas pressures of the gas and the gas recovery container 5 reach equilibrium, the same operation is repeated by replacing the gas recovery container 5. Thereafter, when the equilibrium gas pressure reaches a predetermined value, the valve 3a is switched to "closed" and the valve 3b is switched to "open" to operate the vacuum pump 4. Thereby, the remaining gas can be completely recovered from the gas filling structure 1 to the gas recovery container 5.

According to the first embodiment, gas filling is performed without using a special device such as a compressor or a cylinder until the gas pressure between the gas filling structure 1 and the gas recovery container 5 reaches equilibrium. The gas can be easily collected from the structure 1 into the gas collection container 5. Therefore, the gas recovery device can be made compact, and even if the device is installed in a limited space such as an underground substation, excellent workability can be exhibited without affecting other work.

Further, even when a gas recovery device is carried in and out of an underground substation, troublesome carrying in and out operations such as releasing a machine hatch on the ground and using a tow truck are unnecessary, thereby improving work efficiency. be able to. Therefore, the time and cost required for the gas recovery operation can be reduced, which is economically advantageous.

(2) Second Embodiment--See FIG. 2 A second embodiment corresponds to the second aspect of the present invention.
a is provided. The vinyl container 6a is connected to a pipe. When the valve 3a is "open" and the valve 3b is "closed", gas flows from the gas filling structure 1 into the vinyl container 6a through the pipe 2. When it is confirmed that the vinyl container 6a has expanded to a predetermined size, the vinyl container 6a is removed from the pipe 2, and the operator carries the vinyl container 6a out of the work place while holding it in his hand. Next, a new vinyl container 6a is connected to the pipe 2, and the same operation is repeated. If the plastic container 6a no longer swells due to the differential pressure, the valve 3a
Is switched to "closed", and the valve 3b is switched to "open". As in the first embodiment, the gas is exhausted from the gas sealing structure 1 by the vacuum pump 4 and collected.

According to the second embodiment, the vinyl container 6a, which is a gas recovery container, is extremely light and deformable.
It is extremely easy to carry in. Further, since the vinyl container 6a can be kept crushed when not in use, the occupied space in the work place may be extremely small. Further, the amount of gas collected in the vinyl container 6a can be visually confirmed by the deformation state of the container 6a. Therefore, it is possible to prevent the vinyl container 6a from being ruptured due to overfilling.

(3) Third Embodiment--See FIG. 3 The third embodiment also corresponds to the second aspect of the present invention. It is characterized in that it is molded according to its dimensions.

In the third embodiment, since the vinyl container 6b filled with gas is set so as to easily pass through the doorway of the worker, the function of the second embodiment is provided. In addition to the effects, there are the following effects. That is, even after the gas is collected in the vinyl container 6b, the operator can very easily carry the vinyl container 6b out of the entrance. Therefore, the gas recovery efficiency can be further improved.

(4) Fourth Embodiment--See FIG. 4 A fourth embodiment corresponds to the invention of claim 3, and uses a compound meter as a detecting means for detecting the state of gas in the pipe 2. The feature of the configuration is that a 7, a flow meter 8 and a gas leak detector 9 are attached.

In the fourth embodiment, the pressure in the pipe 2 at the time of gas recovery is checked by the compound meter 7, the flow rate of the gas is measured by the flow meter 8, and the gas leak detector is used. 9 enables detection of gas leakage. Therefore, gas leakage accidents and gas collection containers 5
This can prevent accidents such as ruptures, and ensure excellent safety.

[0025]

As described above, according to the present invention,
With a very simple structure, such as a pipe that allows gas to flow from the gas-filled structure to the gas recovery container and a vacuum pump that collects the gas in the gas-filled structure into the gas recovery container, this device is compact. Without using large-scale equipment as conventionally done,
It is possible to provide an economically excellent gas recovery device capable of simplifying carrying-in / out operations and performing gas recovery with high efficiency.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a method of loading a conventional gas recovery device.

FIG. 6 is a configuration diagram of a conventional gas recovery device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Gas-filled structure 2 ... Piping 3a, 3b ... Valve 4 ... Vacuum pump 5 ... Gas recovery container 6a, 6b ... Vinyl container 7 ... Compound meter 8 ... Flow meter 9 ... Gas detector 10 ... Machine hatch 11 ... Tow truck 12 ... Gas recovery compressor 13 ... Gas storage curdle

Claims (3)

[Claims] 1. A gas recovery apparatus for extracting gas from a gas-filled structure in which gas is sealed in a closed container and recovering the gas into a gas recovery container having a lower pressure than the gas-filled structure. A pipe for connecting a gas to the gas recovery container and connecting the gas to the gas recovery container until the gas pressure of the gas sealing structure and the gas pressure of the gas recovery container are balanced with each other. A gas pump having a suction side connected to the gas-filled structure, and an exhaust side connected to the gas recovery container, and a vacuum pump for collecting gas in the gas-filled structure into the gas recovery container. Collection device. 2. The gas recovery device according to claim 1, wherein said gas recovery container is formed of a deformable container. 3. The gas recovery device according to claim 1, wherein a detection means for detecting a gas state is attached to the pipe.