JP3295699B2 - Manual three-way valve for hexafluoride sulfur gas storage equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual three-way valve for a gas containing hexafluoride gas used for replenishing or replacing gas enclosed in a container such as a transformer or a circuit breaker.

[0002]

2. Description of the Related Art A transformer, a circuit breaker, or a device for energizing an underground high-voltage cable has a height of 2 m and a depth of 1, for example.
m and a width of about 2 m, and is filled with sulfur hexafluoride gas (SF6), which is a fluorine-based gas having good insulating properties, to maintain an insulating state. In the transformer, the pressure is changed in this gas, for example, from 5000 V to 1000 V, and from 1000 V to 100 V. In the circuit breaker, each switch is operated by air pressure in the gas.
N-OFF operation is being performed.

[0003] Since the insulating gas of the above-mentioned various high-voltage equipment is gradually consumed or the insulating property is degraded due to the decomposition of the gas, it is necessary to replenish the gas as appropriate and perform a gas replacement operation. For that work, a gas is supplied into the above-mentioned container via a valve, and while detecting with a sensor so that the gas density in the container is constant, a predetermined gas is taken into consideration while taking into account climate, temperature, etc. Is filling.

In such a gas replacement operation, conventionally, two two-way valves 51 as shown in FIG. 6 are used and connected to a central manifold 52 as shown in FIG.
That is, the two-way valve 51 houses a valve body 57 which is rotated by a handle 56 and moves up and down in a valve body 55 having a first opening 53 and a second opening 54, and moves the valve body 57 to and from a valve seat 58. To open and close the valve. A first two-way valve 61 and a second two-way valve are provided in a direction perpendicular to the axial direction of the conduit 60 and in a direction opposite to each other with respect to a manifold 52 having a conduit 60 for connecting the two-way valve to a gas filling device (not shown). Connected as valve 62.

The second opening 63 of the first two-way valve 61 communicates with a gas supply device such as a gas cylinder (not shown), and connects the first opening 64 to the manifold 52. Further, the first opening 65 of the second two-way valve 62 is connected to a used gas recovery container (not shown). When the first two-way valve 61 and the second two-way valve 62 are connected to the manifold 52, the flanges 66 and 67 are connected to the flanges 68 and 69 of the manifold 52 by bolts.

[0006] When gas is exchanged using the valve device having the valves connected as described above, first, the second two-way valve 62 is released while the first two-way valve 61 is closed, and the low pressure is released. The gas in the apparatus is sucked and collected into the collection container through the conduit 60 of the manifold 52. Thereafter, the second two-way valve 62 is closed and the first two-way valve 61 is opened, and new gas is supplied and filled into the low-pressure apparatus through the line 60 of the manifold 52.

As another conventional example, two two-way valves 71 as shown in FIG. 8 are used as shown in FIG.
Some are connected to a letter joint 72. That is, the two-way valve 7
1 has the same configuration as the two-way valve shown in FIG. 6 except that the first opening passage and the second opening passage form a right angle, and the T-shaped joint 72 has a first axis that forms the same axis. Opening 7
3 and a second opening 74, and a third opening (not shown) perpendicular to this axis. The third opening is connected to the device side. The first opening 73 has a first two-way valve 75, A second two-way valve 76 is connected to the opening by a flange. The usage of the valve device connected as described above is the same as that of the above-described conventional example, and the description thereof is omitted.

[0008]

As described above, conventionally, two two-way valves are required for gas exchange, and the flanges of each two-way valve are fixed to the manifold or the flange of the T-shaped joint with a large number of bolts. Needed work to connect to. As a result, the structure becomes complicated and the whole device becomes large, and it takes a lot of time to connect two two-way valves,
In addition, a great deal of attention was required for the work to firmly connect each two-way valve.

Accordingly, an object of the present invention is to provide a manual three-way valve for a gas containing sulfur hexafluoride gas which can be easily exchanged with gas with a small and simple structure.

[0010]

According to a first aspect of the present invention, a first opening passage and a second opening passage are provided on the left and right sides of a valve body. A passage is disposed substantially at the center of the valve body at right angles to the first opening passage and the second opening passage, and a third opening passage is provided at right angles to the first opening passage and the second opening passage. The upper and lower ends of the passage are a first valve seat and a second valve seat, and the first valve body and the second valve body are respectively opposed to the first valve seat and the second valve seat so as to be freely separated from and connected to the respective valve seats. In the manual three-way valve for a hexafluoride gas storage device provided in each valve chamber, the second opening passage is connected to the gas storage device side, the internal passage communicates with the second opening passage, and the first opening passage is connected to the first opening passage. The first valve chamber of the valve body communicates with the first opening passage, and the second valve chamber of the second valve body communicates with the third opening passage. In the second invention, a first opening passage and a second opening passage are provided on the left and right sides of the valve body, and an internal passage in the valve body is provided. Is disposed substantially at the center of the valve body at right angles to the first opening passage and the second opening passage, and a third opening passage is provided at right angles to the first opening passage and the second opening passage. The upper and lower ends of the internal passage are a first valve seat and a second valve seat, and the first valve body and the second valve body are respectively movable toward and away from the first valve seat and the second valve seat. In the manual three-way valve for sulfuric acid gas storage equipment provided in each valve chamber, the third opening passage is connected to the gas storage equipment side,
The internal passage communicates with the third opening passage, the first valve chamber of the first valve body communicates with the second opening passage, and the second valve chamber of the second valve body communicates with the first opening passage. The communication forms a manual three-way valve for the hexafluoride sulfur gas storage device.

[0011] Since the present invention is configured as described above,
In the first invention, in use, the first opening passage is connected to a gas supply side of hexafluoride, the second opening passage is connected to a manifold connected to the gas storage device, and the third opening passage is connected to the gas supply device. When the first valve body is closed and the second valve body is opened after connection to the gas recovery side, the manifold of the second opening passage and the gas recovery side of the third opening passage are connected to each other, and the gas in the gas storage device is connected. Fluorine gas is recovered. Thereafter, when the second valve body is closed and the first valve body is opened, the gas supply side of the first opening passage and the manifold side of the second opening passage are connected, and the sulfur hexafluoride gas from the gas supply side is supplied to the manifold. Is filled in. Thereafter, when all the valve bodies are closed, the inside of the gas storage device, the first opening passage, and the third opening passage are shut off. In the second invention, the first opening passage is connected to the gas supply side of hexafluoride, the second opening passage is connected to the gas recovery side, and the third opening passage is connected to the gas storage device. After connecting to the manifold, when the second valve body is closed and the first valve body is opened, the gas recovery side of the second opening passage is connected to the manifold of the third opening passage, and the gas in the gas storage device is Collected. Thereafter, when the first valve body is closed and the second valve body is opened, the gas supply side of the first opening passage is connected to the manifold of the third opening passage, and the sulfur hexafluoride gas from the gas supply side is supplied to the inside of the manifold. Is filled. afterwards,
When all the valve bodies are closed, the inside of the gas storage device, the first opening passage, and the second opening passage are shut off.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a first manual three-way valve for a gas hexafluoride gas storage device according to the invention, on the same axis on the left and right sides of the valve 1, a first open passage 3 having a first flange 2 at the end. And a second opening passage 5 having a second flange 4 at an end.
Is provided. Inside the valve 1, an internal passage 6 is disposed substantially at the center of the valve 1 at right angles to the axis of the first opening passage 3 and the second opening passage 5. The valve 1 has a first opening passage 3 and a second opening passage 5.
A third opening passage 7 having a Z-axis perpendicular to both the X-axis, which is the same axis as the above, and the Y-axis, which is the axis of the internal passage 6, is provided. The upper and lower ends of the internal passage 6 are a first valve seat 8 and a second valve seat 10, and the first valve body 11 and the second valve body 12 are respectively opposed to the first valve seat 8 and the second valve seat 10. The first valve body 11 is provided in each of the valve chambers so as to freely contact and separate from the first valve seat 8 and the second valve seat 10. Open / close the valve by coming and going. In addition, the second valve body 12 contacts and separates from the second valve seat 10 to open and close the valve by rotating the second handle 14. The internal passage 6 communicates with the second opening passage 5, communicates the first valve chamber 15 of the first valve body 11 with the first opening passage 3,
The second valve chamber 16 communicates with the third opening passage 7.

The first valve body 11 is fixed to a lower portion of a rectangular tube 21 guided by a guide 20 by a screw. A female screw 22 is formed in the upper part of the square tube 21, and a spindle 24 having a male screw 23 is screwed to the female screw 22. The first handle 13 is fixed to the upper end of the spindle 24 by a nut 25. A cap nut 26 supporting the spindle 24 is screwed into the valve body 27 and fixed to the spindle 24 via an O-ring O. A bellows 29 is provided in the cap nut 26 so that high-pressure gas from between the guide 20 and the sliding portion 28 of the square tube 21 does not leak to the outside. It is fixed to the cylinder 21 and sealed.

When using the manual three-way valve for hexafluoride gas storage equipment having the above-described configuration, the first opening passage 3 is connected to the gas supply side flange by the first flange 2 at the end, and the second opening passage 5 Is connected to the flange of the manifold connected to the equipment at the second flange 4 at the end, the third opening passage 7 is connected to the gas recovery side, and then the first valve body 11 is closed and the second valve body 1 is closed.
When the opening 2 is opened, the manifold connection passage of the second opening passage 5 and the gas recovery side of the third opening passage 7 are connected, and the gas in the device is recovered.

Thereafter, the second valve body 12 is closed and the first valve body 11 is closed.
Is opened, the gas supply side of the first opening passage 3 and the manifold connection passage side of the second opening passage 5 are connected, and the gas from the gas supply side is filled in the manifold. Thereafter, when all valves are closed, the inside of the device, the first open passage 3 and the third open passage 7 are shut off, and the device is sealed.

FIGS. 4 and 5 show a second manual three-way valve for gas hexafluoride gas storage equipment according to the present invention, in which the first opening passage 31 and the second opening passage 31 are located on the same X axis on the left and right sides of the valve 30.
An opening passage 32 is provided, and flanges 33 and 34 are provided at ends of the opening passages 31 and 32, respectively. The internal passage 35 in the valve 30 is disposed substantially at the center of the valve 30 at right angles to the X-axis that is the axis of the first opening passage 31 and the second opening passage 32.
A third with a flange 36 at the end perpendicular to both axes
An opening passage 37 is provided. The upper and lower ends of the internal passage 35 are a first valve seat 40 and a second valve seat 41, and the first valve body 42 and the second valve body 43 are respectively opposed to the first valve seat 40 and the second valve seat 41. The first valve seat 40 and the second valve seat 41 are provided in each of the valve chambers so as to be able to freely contact and separate from each other. The second valve chamber 46 of the second valve body 43 communicates with the passage 32 and
By communicating with 1, a manual three-way valve 30 for a hexafluoride sulfur gas storage device is formed.

When using the three-way valve having the above configuration, the first
The flange 33 of the opening passage 31 is connected to the gas supply side, the flange 34 of the second opening passage 32 is connected to the gas recovery side,
After connecting the third opening passage 37 to the flange of the manifold connected to the equipment, the second valve body 43 is closed and the first valve body 42 is opened, and the gas recovery side of the second opening passage 32 and the third opening passage 37 are connected. And the gas in the equipment is recovered. Thereafter, when the first valve body 42 is closed and the second valve body 43 is opened, the gas supply side of the first opening passage 31 and the third opening passage 37
And the gas from the gas supply side is charged into the manifold. After that, when all valves are closed,
The inside of the device, the first opening passage 31 and the second opening passage 32 are shut off, and the device is sealed.

[0018]

The present invention is configured as described above.
There is no need to use two two-way valves like the conventional one,
Therefore, it is possible to provide a small-sized and simple structure of a manual three-way valve for hexafluoride sulfur gas storage equipment, and it is possible to easily perform gas exchange in the equipment.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the first invention of the present invention.

FIG. 2 is a partial cross-sectional view near the third passage.

FIG. 3 is a schematic perspective view of a main part of the first embodiment of the present invention.

FIG. 4 is a sectional view of a second embodiment of the present invention.

FIG. 5 is a side view of the same.

FIG. 6 is a cross-sectional view of a two-way valve used for connecting a conventional manifold.

FIG. 7 is a front view connected to a manifold using the two-way valve.

FIG. 8 is a cross-sectional view of a two-way valve used for connecting a conventional T-type joint.

FIG. 9 is a front view connected to a T-shaped joint using the same two-way valve.

[Explanation of symbols]

 1,30 Valve 2,33 First flange 3,31 First opening passage 4,34 Second flange 5,32 Second opening passage 6,35 Internal passage 7,37 Third opening passage 8,40 First valve seat 10 , 41 Second valve seat 11, 42 First valve body 12, 43 Second valve body 13 First handle 14 Second handle 15, 45 First valve chamber 16, 46 Second valve chamber

Continuation of the front page (56) References JP-A-63-9785 (JP, A) JP-A-9-56024 (JP, A) JP-A-61-565 (JP, U) JP-A-49-86439 (JP) , U) Japanese Utility Model Showa 48-58520 (JP, U) Japanese Utility Model Showa 48-100433 (JP, U) Japanese Patent Publication No. 1-36323 (JP, B2) Japanese Utility Model Publication No. 4-38090 (JP, Y2) (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 13/06 H01H 33/70 F16K 11/00-11/24 F16K 27/00-27/12

Claims (2)

(57) [Claims] A first opening passage and a second opening passage are provided on the left and right sides of a valve body, and an internal passage in the valve body is substantially at the center of the valve body at right angles to the first opening passage and the second opening passage. And a third opening passage is provided at right angles to the first opening passage and the second opening passage, and upper and lower ends of the internal passage are defined as a first valve seat and a second valve seat. A manually operated three-way valve for a gas storage apparatus for hexafluoride gas, wherein a first valve body and a second valve body are provided in respective valve chambers so as to be able to approach and separate from the respective valve seats so as to face the second valve seat. An opening passage connected to the gas storage device side, the internal passage communicating with the second opening passage, a first valve chamber of the first valve body communicating with the first opening passage, the second valve body; A second three-way valve communicating with the third opening passage. 2. A first opening passage and a second opening passage are provided on the left and right sides of the valve body, and an internal passage in the valve body is substantially centered at right angles to the first opening passage and the second opening passage. And a third opening passage is provided at right angles to the first opening passage and the second opening passage, and upper and lower ends of the internal passage are defined as a first valve seat and a second valve seat, respectively. The manual three-way valve for a hexafluoride gas storage device, wherein a first valve body and a second valve body are provided in each valve chamber so as to be able to approach and separate from each valve seat so as to face the seat and the second valve seat, respectively. A third opening passage connected to the gas storage device side, the internal passage communicating with the third opening passage, a first valve chamber of the first valve body communicating with the second opening passage, A manual three-way valve for a hexafluoride sulfur gas storage device, wherein a second valve chamber of a valve body communicates with the first opening passage.