JPH11183336A - Gas adsorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To respond to a outside diamter change of an adsorption pipe by providing a flow passage for detection gas in the central part, a pair of seal members, the respective end faces of which are respectively abutted against both end faces of an adsorption pipe, one seal member being to close to and separate from the adsorption pipe, and pressing one seal member to the end face of the adsorption pipe with designated force. SOLUTION: A sliding member 29 is moved to the left and an adsorption pipe 33 is pressed in between both seal members 31,32. After that, when the sliding member 29 is put in the free state, the sliding member 29 is moved to the original position by a spring member 36, and both end faces of the adsorption pipe 33 are held with designated pressure by the spring member 36 at the conical end faces 31b, 32b of the seal members 31,32. Thus, it is possible to respond even to a change in outside diameter of the adsorption pipe 33. The respective end faces 31b, 32b of the seal members 31, 32 are formed to be conical, thereby guiding the adsorption pipe 33 to the central part. Accordingly, the adsorption pipe can be always held in a stable attitude, and the occurrence of leak can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulating apparatus, such as a gas-insulated transformer, which is provided with an adsorbing pipe filled with a decomposition component in an insulating gas derived from a container of a gas-insulated apparatus. The present invention relates to a gas adsorbing device for detecting an abnormality of an insulating gas by being adsorbed by an adsorbent, and more particularly to a holding structure of an adsorption tube.

[0002]

2. Description of the Related Art FIG. 3 is a schematic diagram showing the structure of a conventional gas adsorption device disclosed in, for example, Japanese Patent Application Laid-Open No. H8-110333. In the drawing, reference numeral 1 denotes a collection container for storing an insulation gas collected from inside a gas insulation device filled with an insulation gas, such as a gas insulation transformer, and 2 denotes a collection container provided on a side wall of the collection container 1. Stop valves 3, 4 are cylindrical holding members having one end closed, and the other end openings 3a, 4
They are arranged so that a side faces each other.

[0003] Reference numerals 5 and 6 denote hose fittings attached to one end of the holding members 3 and 4, reference numerals 7 and 8 denote O-rings fitted into the holding members 3, 4, and reference numeral 9 denotes these O-rings 7, An adsorption tube 10 whose both ends are fitted to and held by 8 is an adsorbent such as silica gel or activated carbon filled in the adsorption tube 9;
Reference numeral 1 denotes a suction device comprising a cylinder 11a and a piston 11b, which is connected to a hose fitting 6 via a hose 12, and the inside of the cylinder 11a communicates with the inside of the holding member 4. Reference numeral 13 denotes a hose that connects between the stop valve 2 and the hose fitting 5 to communicate between the collection container 1 and the holding member 3.

[0004] Next, the operation of the conventional gas adsorbing device configured as described above will be described. First, a gas to be detected is sampled from the gas insulating device and stored in the sampling container 1 by a predetermined amount. Next, the stop valve 2 is opened, and the piston 11b of the suction device 11 is moved rightward in FIG.
a, the gas to be detected in the collection container 1 is sucked and guided through the hose 13 into the holding member 3.
It passes through the inside of the suction pipe 9 and is introduced into the cylinder 11 a of the suction device 11 through the holding member 4 and the hose 12.

When a gas to be detected contains a decomposed gas while passing through the inside of the adsorption tube 9, the gas to be detected is adsorbed by the filled adsorbent 10 and stays in the adsorption tube 9. Therefore, after that, a coloring reaction reagent that changes color due to, for example, a decomposition gas flows into the adsorption tube 9 and the decomposition gas is detected based on the degree of the color change to determine an abnormality inside the gas-insulated electric device.

[0006]

Since the conventional gas adsorber is constructed as described above, when the outer diameter of the adsorption tube 9 is different, the holding members 3, 4 having the inner diameter corresponding to the outer diameter each time. Is required. Further, since the suction pipe 9 is held via the O-rings 7 and 8, the posture becomes unstable, and leakage or the like is likely to occur. Further, since the gas to be detected is temporarily stored in the collection container 1, a part of the decomposed gas may adhere to the inner wall of the collection container 1 and may not reach the inside of the adsorption pipe 9, which may cause a problem. However, there is a problem that abnormal detection cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to hold the suction tube with the same holding member even if the outside diameter of the suction tube is different. It is another object of the present invention to provide a gas adsorbing device that can hold a posture in a fixed position to prevent the occurrence of leakage and that can accurately detect an abnormality.

[0008]

According to a first aspect of the present invention, there is provided a gas adsorbing apparatus, comprising: an adsorbing tube filled with an adsorbent; a detection gas flow passage in a central portion; A pair of seal members each of which is movable in a direction in which at least one of the seal members comes into contact with and separates from the suction tube, and a pressing member that presses one of the movable sides of the seal member against the end surface of the suction tube with a predetermined force. It is provided with.

According to a second aspect of the present invention, there is provided a gas adsorbing apparatus according to the first aspect, wherein one end face of the sealing member which comes into contact with the end face of the suction pipe is formed in a conical shape.

Further, a gas adsorbing device according to claim 3 of the present invention is the gas adsorbing device according to claim 1 or 2, wherein the seal member is formed of a fluorine-based polymer material.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a gas adsorption device according to Embodiment 1 of the present invention, and FIG. 2 is a front view showing a configuration of a gas adsorption unit in FIG.

In FIG. 1, reference numeral 14 denotes a container of a gas insulating device filled with an insulating gas, such as a gas insulating transformer.
15 is a stop valve arranged on the side wall of the container 14, 16 is a flow meter whose inlet side is connected to the stop valve 15 via a flange connecting portion 17, and 18 and 19 are an inlet side and an outlet of a gas adsorbing section described later. One stop valve 18 is connected to the outlet side of the flow meter 16 via a hose 20. 2
Reference numeral 1 denotes a waste gas container provided with a stop valve 22 on the inlet side, and reference numeral 23 denotes a hose connecting between the stop valves 19 and 22.

Reference numeral 24 denotes a base plate, and reference numerals 25 and 26 denote a pair of support frames which are arranged on the upper surface of the base plate 25 with a predetermined interval therebetween, and are fixed to the base plate 24 by bolting or the like. 27, 28 are guide members fixedly penetrating both support frames 25, 26, and a guide hole 2 penetrating coaxially in the center.
7a and 28a are respectively formed. Reference numeral 29 denotes a guide hole 27a of the guide member 27 in which a through hole 29a is formed
A large diameter portion 29b and a concave portion 29c having an open end in the large diameter portion 29b are provided at one end, and a stop valve 18 is provided at the other end. And a connecting portion 29d connected to the connecting portion 29d and a screw portion 29e connected to the connecting portion 29d.

Reference numeral 30 denotes a fitting member which has a through hole 30a formed in the center thereof and is fitted in the guide hole 28a of the guide member 28, and has a large-diameter portion 30b and a large-diameter portion 30b at one end.
A concave portion 30c having one end opened therein, and a connecting portion 30d connected to the stop valve 19 and a screw portion 30e connected to the connecting portion 30d are formed on the other end side. Reference numerals 31 and 32 denote sealing members made of, for example, a fluoropolymer material such as fluororubber which are fitted and embedded in the recesses 29c, 30c.
Flow passages 31a and 32a communicating with a are formed, and end surfaces 31b and 32b on opposite sides are formed in a conical shape.

Reference numeral 33 denotes an adsorption tube whose both end surfaces are in contact with the respective end surfaces 31b and 32b of the seal members 31 and 32, and 34 denotes an adsorbent filled in the adsorption tube 33, for example, silica gel, activated carbon, or the like. Have been. Numeral 35 is a nut screwed into the screw portion 29e of the sliding member 29, and numeral 36 is the guide member 27.
And a large-diameter portion 29b of the sliding member 29, which presses the sliding member 29 to the right in the drawing with a predetermined force, thereby causing the suction pipe 33 to be sealed with the two sealing members 31, 32. Hold in between. Numeral 37 denotes a nut for fixing the fitting member 30 to the guide member 28 by being screwed into the screw portion 30e of the fitting member 30.
8.

Next, the operation of the gas adsorption device according to Embodiment 1 of the present invention configured as described above will be described. First, after moving the sliding member 29 to the left in FIG. 2 and inserting the suction tube 33 between the two seal members 31 and 32,
When the sliding member 29 is set in a free state, the sliding member 29 is moved to its original position by the force of the spring member 36, that is, until the nut 35 contacts the end face of the guiding member 27 in the right direction in FIG. The suction tube 23 slides and moves within the guide hole 27a, and the suction tube 23 has a predetermined force due to the spring pressure of the spring member 36 by the conical end surfaces 31b and 32b of the both seal members 31 and 32. Pressed and held.

Next, one end of the suction section 38 is connected to the stop valve 18, the hose 20, the flow meter 16,
7 and a stop valve 15 connected to the container 14 of the gas insulated equipment, and the other end is connected to a stop valve 19, a hose 23 and a stop valve 22 to a waste gas container 21.
When the stop valves 18, 19, and 22 are opened and the stop valve 15 is opened little by little, the insulating gas in the container 14 of the gas insulating device flows out as the gas to be detected.

Accordingly, by adjusting the degree of opening of the stop valve 15 while watching the flow meter 16, a predetermined amount of the gas to be detected is supplied to the stop valve 15 and the flange connecting portion 1.
7, flow meter 16, hose 20, stop valve 18, sliding member 29, sealing member 31, suction tube 33, sealing member 32, sliding member 30, stop valve 19, hose 2
3. The gas flows in the order of the stop valve 22 and is discharged into the waste gas container 21. When the gas to be detected contains a decomposed gas while passing through the inside of the adsorption tube 33, the gas is adsorbed in the filled adsorbent 34 and stays in the adsorption tube 33. Thereafter, for example, a coloring reaction reagent that changes color due to the decomposed gas is caused to flow into the adsorption tube 33, and the presence of the decomposed gas in the gas to be detected is detected based on the degree of the discoloration. Is determined.
In addition, as a method of detecting that the decomposition gas is contained, a method of thermally desorbing the adsorbed decomposition gas and then analyzing it by a gas chromatograph, a gas chromatograph mass spectrometer, or the like is employed. .

As described above, according to the first embodiment, the seal member 31 can be moved in the axial direction of the suction tube 33, and the end face of the suction tube 33 is moved by the predetermined force of the spring member 36. , 32 are pressed air-tightly by the end surfaces 31b, 32b, so that it is possible to cope with a change in the outer diameter of the suction pipe 33 and to hold the outer circumference of the suction pipe 33. Since it is not performed, the possibility that the suction tube 33 is damaged due to a biased force is also prevented.

Each of the end surfaces 31 of the sealing members 31 and 32
b and 32b are formed in a conical shape, and the conical portion forms
3 is guided to the center, so that it is possible to prevent the occurrence of leakage by always holding it in a stable posture, and furthermore, the both seal members 31, 32 have excellent durability against chemicals. Since it is formed of a fluorine-based polymer material such as fluororubber, accurate abnormality detection can be performed without being affected by, for example, active decomposition components in the sampled gas.

In the above construction, both seal members 31, 32 are used.
The case where both end surfaces 31b and 32b are formed in a conical shape has been described. Needless to say, even if both end surfaces are formed flat, it is possible to cope with a change in the outer diameter of the adsorption tube 33.
Further, by changing the tightening position of the nut 35, the holding force of the suction tube 33 can be adjusted.
And not shown in the configuration in FIG.
If you make it foldable by dividing it into two in the longitudinal direction and connecting it with, for example, a hinge, it will be easy to carry,
Furthermore, for example, the mounting holes of the bolts that fix one of the support frames 26 are long holes in the longitudinal direction of the suction tube 33 so that the mounting position of the support frame 26 can be adjusted. Many practical effects can be exerted, for example, it is easier to cope with a change in the length.

[0022]

As described above, according to the first aspect of the present invention, the adsorption tube filled with the adsorbent, the detection gas flow path in the center portion, and one end surface at the both end surfaces of the adsorption tube. A pair of seal members that can move in a direction in which at least one of the seal members comes into contact with and separates from the suction tube, and a pressing member that presses one of the movable sides of the seal member against the end surface of the suction tube with a predetermined force. Therefore, it is possible to provide a gas adsorption device that can cope with a change in the outer diameter of the adsorption tube.

According to a second aspect of the present invention, in the first aspect, the one end face of the seal member that comes into contact with the end face of the suction pipe is formed in a conical shape, so that it is possible to cope with a change in the outer diameter of the suction pipe. As a matter of course, it is possible to provide a gas adsorption device capable of holding the adsorption tube in a stable posture and preventing leakage.

Still further, according to claim 3 of the present invention,
3. A gas adsorption device according to claim 1 or 2, wherein the seal member is formed of a fluorine-based polymer material, so that an accurate abnormality can be detected without being affected by an active decomposition component or the like in a sampled gas. Can be.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a gas adsorption device according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing a configuration of a gas adsorption unit in FIG.

FIG. 3 is a schematic diagram showing a configuration of a conventional gas adsorption device.

[Explanation of symbols]

14 container, 21 waste gas container, 31, 32 seal member, 31b, 32b end face, 33 suction tube, 34 adsorbent, 36 spring member (pressing member), 38 suction section.

Claims (3)

[Claims] 1. An adsorption tube filled with an adsorbent, a detection gas flow path at a central portion, one end surface of which is in contact with both end surfaces of the adsorption tube, and at least one of which is in contact with or separated from the adsorption tube. A gas adsorbing device comprising: a pair of seal members movable in a direction; and a pressing member for pressing one of the movable sides of the seal member against an end face of the adsorption tube with a predetermined force. 2. An end face of the seal member, which is in contact with an end face of the suction tube, is formed in a conical shape.
The gas adsorption device as described in the above. 3. The gas adsorption device according to claim 1, wherein the sealing member is formed of a fluorine-based polymer material.