JP5723657B2 - Gas replacement device in the gas pipe - Google Patents

Description

  The present invention relates to a gas replacement device in a gas pipe that discharges gas staying in a predetermined section in the gas pipe to the outside and replaces it with another gas.

Conventionally, when a new gas pipe is connected to an existing gas pipe, or when a part of an existing gas pipe is replaced with a new gas pipe, the gas remaining in the gas pipe is discharged to the outside, etc. Or work after replacing the gas.
For example, in Patent Document 1, a partition wall that is movable while partitioning the inside of the gas pipe is installed in the gas pipe, and the partition wall is moved to stay in the gas pipe from a communication hole formed by drilling the gas pipe. A gas replacement device in a gas pipe is disclosed in which the gas to be discharged is discharged and another gas is replaced in the gas pipe.
The partition wall has a bag body that can be expanded and contracted in the gas pipe, and the bag body is inflated by increasing the internal pressure, pressing the gas pipe and closely contacting the inner peripheral surface of the gas pipe. The inside of the gas pipe is partitioned.

JP 2007-198524 A

However, in the gas replacement device in a gas pipe disclosed in Patent Document 1, since the bag body of the partition wall partitions the gas pipe in a state of pressing the gas pipe, the partition wall is a bent portion in a joint portion of the gas pipe or the like. When passing through or a step, it is necessary to adjust the internal pressure of the bag body or adjust the force to move the partition wall.
In addition, since the bag body of the partition wall slides in close contact with the inner peripheral surface of the gas pipe, friction occurs between the bag main body and the inner peripheral surface of the gas pipe, and the inner peripheral surface of the gas pipe is damaged. May occur.
In particular, when the inner peripheral surface of the gas pipe is coated, there is a possibility that the painted surface may be damaged by friction with the partition wall.

  The present invention has been made in view of the above-described circumstances, and can easily discharge the gas staying in the gas pipe to the outside without being affected by the shape of the gas pipe and damaging the inner peripheral surface of the gas pipe. An object of the present invention is to provide a gas replacement device in a gas pipe.

In order to achieve the above object, a gas replacement device in a gas pipe according to the present invention is a gas replacement device in a gas pipe that discharges a gas staying in a predetermined section in the gas pipe and replaces it with another gas,
A diaphragm capable of shielding the inside of the gas pipe when the gas pipe is inserted into the gas pipe from the first communication hole formed in the vicinity of one end of the predetermined section of the gas pipe and expandable and expandable, and the diaphragm is expanded. A biasing member that biases in the direction, an operation unit that operates the biasing force of the biasing member to manipulate the shape of the diaphragm, a diaphragm extraction means that extracts the diaphragm to the outside of the gas pipe, and the first communication A gas for moving the diaphragm is filled into the gas pipe through the hole, the diaphragm moving gas is applied to the expanded diaphragm, and the diaphragm is moved from one end side to the other end side of the predetermined section of the gas pipe. Gas discharge means for discharging gas staying in a predetermined section in the gas pipe from a second communication hole formed in the vicinity of the other end , and the urging member has a plurality of elastically deformable expansions Each of the plurality of extension wires has a wire. One end is fixed to the diaphragm along the outer edge of the diaphragm, spaced apart from each other, and the other end is gathered in one place, from the other end side to the one end side And the operation portion includes an operation ring through which the plurality of extension wires are inserted, and one end portion and the other end portion of the plurality of extension wires. An operation ring support portion that supports the operation ring at a predetermined position between the first and second expansion wires. When the operation ring is supported on one end of the plurality of expansion wires, one of the plurality of expansion wires is supported. The end portions are elastically deformed in a direction approaching each other .

In the present invention, the diaphragm is expanded by operating the operating portion inserted into the gas pipe, and stays in the predetermined section in the gas pipe by moving from one end side to the other end side of the predetermined section in the gas pipe. The gas to be discharged can be easily discharged from the second communication hole.
And since the operation part can operate the shape of a diaphragm, it can be set as the shape which made the diaphragm follow the shape in a gas pipe. In particular, when the gas pipe is bent or has a step in the gas pipe, the shape of the diaphragm can be made to follow the bending or the step, so that the diaphragm can be smoothly moved in the gas pipe. Can do.
In addition, since the urging member urges the diaphragm in the expansion direction and presses the diaphragm into the duct by adjusting the operation section, the inner peripheral surface of the gas pipe is rubbed and damaged when the diaphragm moves. Can be suppressed.

In the gas replacement device in a gas pipe according to the present invention, the diaphragm take-out means has one end connected to the diaphragm and the other end arranged outside the gas pipe through the first communication hole. It is preferable that a cable body and a reel installed outside the gas pipe and capable of winding the cable body from the other end side are provided.
By doing in this way, the diaphragm inserted in the gas pipe can be easily taken out of the gas pipe.

According to the present invention, the diaphragm inserted into the gas pipe is expanded by operating the operating portion, and the predetermined section in the gas pipe is moved from one end side to the other end side of the predetermined section in the gas pipe. The gas staying in the gas can be easily discharged from the second communication hole.
And since the operation part can operate the shape of a diaphragm, it can be set as the shape which made the diaphragm follow the shape in a gas pipe. In particular, when the gas pipe is bent or has a step in the gas pipe, the shape of the diaphragm can be made to follow the bending or the step, so that the diaphragm can be smoothly moved in the gas pipe. Can do.
In addition, since the urging member urges the diaphragm in the expansion direction and presses the diaphragm into the duct by adjusting the operation section, the inner peripheral surface of the gas pipe is rubbed and damaged when the diaphragm moves. Can be suppressed.

It is a figure which shows an example of the gas replacement apparatus in a gas pipe by embodiment of this invention. It is a figure explaining a biasing member and an operation part. It is a figure explaining the diaphragm of a contracted state. It is a figure explaining the gas pipe by which the gas in a gas pipe was substituted. It is a figure explaining the diaphragm which moves the inside of the gas pipe from which a diameter changes on the way.

(First embodiment)
Hereinafter, a gas pipe gas replacement device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1, the gas replacement device 1 according to the present embodiment includes a gas replacement device 1 in a gas pipe 10 that is a construction target when performing a branching work of the gas pipe 10 or a work for replacing a part of the gas pipe 10. It is used when the gas G1 staying in the predetermined section 10a is discharged to the outside.

  Sealing materials 11 and 11 for blocking the flow of the gas G1 are installed at both end portions 10b and 10c in a predetermined section 10a of the gas pipe 10. The sealing materials 11 and 11 are formed in a bag shape with a stretchable material, and are inserted into the gas pipe 10 through holes (not shown) appropriately formed in the gas pipe 10, and air is sealed inside. The outer peripheral surface of the gas pipe 10 is in close contact with the inner peripheral surface 10d of the gas pipe 10.

Further, a first communication hole 12 is formed in the vicinity of one end 10 b of the predetermined section 10 a of the gas pipe 10, and a first communication pipe 13 protruding outward from the gas pipe 10 is formed in the first communication hole 12. It is connected. The inside and outside of the gas pipe 10 communicate with each other through the first communication pipe 13.
Further, a second communication hole 14 is formed in the vicinity of the other end 10 c of the predetermined section 10 a of the gas pipe 10, and a second communication pipe 15 protruding outward from the gas pipe 10 is formed in the second communication hole 14. It is connected. The inside and outside of the gas pipe 10 communicate with each other through the second communication pipe 15.

  The gas replacement device 1 according to the present embodiment includes a diaphragm 2 that is inserted into the gas pipe 10 and can shield the gas pipe 10, and a plurality of expansion wires (biasing members) that can be biased in a direction in which the diaphragm 2 is expanded. 3, an operating portion 4 for operating the urging force of the expansion wire 3 to operate the shape of the diaphragm 2, a diaphragm extracting means 5 for extracting the diaphragm 2 inserted into the gas pipe 10 to the outside of the gas pipe 10, Gas filled in the gas pipe 10 from the communication pipe 13 and the diaphragm 2 is expanded, the predetermined section 10a of the gas pipe 10 is moved, and the gas staying in the predetermined section 10a in the gas pipe 10 from the second communication pipe 15 is moved. And a gas discharge means 6 for discharging.

As shown in FIGS. 1 and 2, the diaphragm 2 is made of a thin film resin having elasticity and flexibility such as polyurethane, and is formed in a substantially circular shape that is slightly larger than the cross-sectional shape in the gas pipe 10.
The expansion wire 3 is a wire formed of metal, resin, or the like, and is configured to be bent and elastically deformed.
One end 3 a of the extension wire 3 is fixed to the outer edge 2 a of the diaphragm 2 at intervals in the circumferential direction of the diaphragm 2, and the other end 3 b is collected at one place by the extension wire fixture 31. ing. As a result, the plurality of extension wires 3 extend obliquely outward from the other end 3b toward the one end 3a. The plurality of expansion wires 3 are biased in the direction in which the diaphragm 2 is expanded.
Further, as shown in FIG. 3, the extension wire 3 is configured to be elastically deformable linearly.

Returning to FIGS. 1 and 2, the operation unit 4 is an operation ring that manipulates the shape of the extension wire 3 by inserting a plurality of extension wires 3 and changing the positions of the extension wires 3 in the extending direction. 41, one end 42a side is connected to the operation ring 41, and the other end 42b (see FIG. 1) side is disposed outside the gas pipe 10 through the first communication pipe 13 (operation ring support part). 42, and an operation tube (operation ring support portion) 43 through which the operation cable 42 is inserted to support the operation cable 42 at a predetermined position.

As shown in FIG. 2, the operation ring 41 is formed in an annular shape. When the operation ring 41 is disposed in the vicinity of the other end 3b of the extension wire 3, the extension wire 3 expands the outer edge 2a of the diaphragm 2 by urging it outward.
On the other hand, as shown in FIG. 3, when the operation ring 41 is arranged in the vicinity of one end 3 a of the extension wire 3, each of the extension wires 3 becomes linear, and the outer edge 2 a of the diaphragm 2 is gathered. The diaphragm 2 is reduced.
As described above, the opening degree of the diaphragm 2 can be adjusted by adjusting the position of the operation ring 41 with respect to the expansion wire 3.

As shown in FIGS. 1 to 3, the operation tube 43 has one end 43 a located in the vicinity of the expansion wire fixture 31 and the other end 43 b (see FIG. 1) located in the vicinity of the first communication pipe 13. doing. The operation tube 43 is fixed to the cord body 51 by being bundled with the cord body 51 of the diaphragm taking-out means 5 described later.
The operation cable 42 is configured to be movable in the extending direction while being inserted through the operation tube 43.
Then, the operation ring 41 attached to the operation cable 42 is extended along the extension wire 3 by pushing or pulling the other end 42 b of the operation cable 42 inserted through the operation tube 43 from the outside of the gas pipe 10. It can move and the diaphragm 2 can be expanded or contracted.

  The diaphragm take-out means 5 has one end 51 a connected to the diaphragm 2 via the expansion wire fixture 31 and the other end 51 b (see FIG. 1) arranged outside the gas pipe 10 through the first communication pipe 13. A cable body 51, a reel 52 installed outside the gas pipe 10 and capable of winding the cable body 51 from the other end 51b side (see FIG. 1), and a reel installed in the vicinity of the first communication pipe 13. And a housing 53 (see FIG. 1) for housing 52.

The reel 52 is configured to be able to wind and unwind the operation tube 43 together with the cable body 51, and is inserted into the gas pipe 10 by rotating the reel 52 to wind the cable body 51 and the operation tube 43. The diaphragm 2, the expansion wire 3, and the operation ring 41 can be easily taken out.
The casing 53 has a part of the first communication pipe 13 inserted therein, and communicates with the inside of the gas pipe 10 via the first communication pipe 13.

The gas discharge means 6 includes a gas cylinder 61 capable of supplying the diaphragm moving gas G <b> 2 into the housing 53. When the gas cylinder 61 supplies the diaphragm moving gas G <b> 2 into the housing 53, the diaphragm moving gas G <b> 2 is supplied into the gas pipe 10 through the first communication pipe 13. When the diaphragm moving gas G2 hits the diaphragm 2 inserted into the gas pipe 10 and expanded to a predetermined size, the diaphragm 2 moves in the gas pipe 10.
At this time, when the diaphragm moving gas G2 hits the diaphragm 2 arranged on the one end 10b side in the gas pipe 10 from the one end 10b side in the gas pipe 10, the diaphragm 2 is placed in the gas pipe 10 The gas G1 staying in the predetermined section 10a in the gas pipe 10 is discharged from the second communication pipe 15 to the outside of the gas pipe 10 in order to move from the one end 10b side to the other end 10c side. The

(Gas replacement method)
Next, a gas replacement method in the gas pipe using the gas replacement device 1 described above will be described.
Here, a method of replacing the gas G1 staying in the predetermined section 10a in the gas pipe 10 with another gas will be described.
First, seal materials 11 and 11 for preventing the flow of the gas G1 inside and outside the predetermined section 10a are installed in the vicinity of both end portions 10b and 10c in the predetermined section 10a of the gas pipe 10, respectively.
Next, the first communication hole 12 is drilled in the vicinity of one end 10 b of the predetermined section 10 a of the gas pipe 10, and the first communication pipe 13 is connected to the first communication hole 12. Further, the second communication hole 14 is drilled in the vicinity of the other end 10 c of the predetermined section 10 a of the gas pipe 10, and the second communication pipe 15 is connected to the second communication hole 14.
Next, the diaphragm 2, the expansion wire 3, and the operation ring 41 are inserted into the gas pipe 10 from the first communication pipe 13. And the housing | casing 53 which accommodated the reel 52 around which the cable body 51 and the operation tube 43 were wound, and the 1st communicating pipe 13 are connected.

Subsequently, the operation cable 42 is operated to adjust the degree of opening of the diaphragm 2 by the extension wire 3. At this time, it is preferable to adjust so that the outer edge part 2a of the diaphragm 2 may not press the inner peripheral surface 10d of the gas pipe 10 strongly.
Subsequently, the diaphragm moving gas G2 is filled into the housing 53 with the gas cylinder 61, and the diaphragm moving gas G2 is supplied into the gas pipe 10 through the first communication pipe.
In the gas pipe 10, the inner pressure of the one end 10 b side in the gas pipe 10 is larger than that of the other end 10 c with the diaphragm 2 as a boundary. Therefore, as shown in FIG. The inside of the tube 10 moves from the one end 10b side to the other end 10c side. At this time, the cable body 51 and the operation tube 43 are unwound from the reel 52.

  Then, in order to move in the gas pipe 10 from the one end 10b side to the other end 10c side in a state where the diaphragm 2 is expanded, it stays in the predetermined section 10a in the gas pipe 10 from the second communication pipe 15. The gas G1 is pushed out to the diaphragm 2 and discharged from the second communication pipe 15 to the outside of the gas pipe 10.

Next, the diaphragm 2 is reduced by operating the operation cable 42.
Then, the cord body 51 and the operation tube 43 are wound up by the reel 52, and the diaphragm 2, the extension wire 3 and the operation ring 41 are taken out from the inside of the gas pipe 10 to the outside.
Next, a new gas is filled in the predetermined section 10 a in the gas pipe 10.
In addition, you may employ | adopt the gas substituted to the gas pipe | tube 10 for the gas G2 for diaphragm movement.
And after taking out the diaphragm 2, the sealing materials 11 and 11 are removed as needed. Moreover, the housing | casing 53 and the reel 52 are removed as needed, and the 1st communicating hole 12 and the 2nd communicating hole 14 are plugged up.

Next, the effect of the gas replacement device in the gas pipe described above will be described with reference to the drawings.
In the gas replacement device 1 according to this embodiment described above, the diaphragm 2 inserted into the gas pipe 10 is expanded and moved from one end 10b side of the predetermined section 10a in the gas pipe 10 to the other end 10c side. By doing so, the gas G1 staying in the predetermined section 10a in the gas pipe 10 can be easily discharged from the second communication pipe 15.
And since the operation part 4 can operate the shape of the diaphragm 2, it can be set as the shape which made the diaphragm 2 follow the shape in the gas pipe | tube 10. FIG. In particular, when the gas pipe 10 is bent, the gas pipe 10 has a step, or the diameter of the gas pipe 10 changes in the middle of the extending direction of the gas pipe 10 as shown in FIG. Since the shape of the diaphragm 2 can be made to follow this bending or step, the movement in the gas pipe 10 can be performed smoothly.
Further, since the expansion wire 3 urges the diaphragm 2 in the expansion direction and presses it into the gas pipe 10 by the operation of the operation unit 4, the inner peripheral surface 10 d of the gas pipe 10 can be adjusted by moving the diaphragm 2. Can be prevented from being damaged by rubbing.

As mentioned above, although embodiment of the gas replacement apparatus 1 in the gas pipe | tube by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the embodiment described above, the cable body 51 and the operation tube 43 inserted into the gas pipe 10 are wound up by the reel 52, but the means for taking out the cable body 51 and the operation tube 43 from the gas pipe 10 is a reel. A configuration other than 52 may be adopted.

1 Gas replacement device 2 Diaphragm 3 Expansion wire (biasing member)
3a One end 3b The other end 4 Operation section 5 Diaphragm extraction means 6 Gas discharge means 10 Gas pipe 10a Predetermined section 10b One end 10c The other end 41 Operation ring 42 Operation cable 43 Operation tube 51 Cable body 51a One end 51b The other end 52 Reel 53 Housing

Claims (2)

A gas replacement device in a gas pipe for discharging a gas staying in a predetermined section in the gas pipe and replacing it with another gas,
A diaphragm capable of shielding the inside of the gas pipe when it is inserted into the gas pipe from the first communication hole formed in the vicinity of one end of the predetermined section of the gas pipe and expands and contracts;
A biasing member that biases the diaphragm in a direction to expand the diaphragm;
An operation unit for operating the urging force of the urging member to manipulate the shape of the diaphragm;
A diaphragm removing means for extracting the diaphragm to the outside of the gas pipe;
Filling the gas pipe into the gas pipe from the first communication hole, and applying the diaphragm movement gas to the expanded diaphragm, the diaphragm from one end side to the other end of the predetermined section of the gas pipe Gas discharge means for discharging gas staying in a predetermined section in the gas pipe from a second communication hole formed in the vicinity of the other end by moving to the side ,
The biasing member has a plurality of expansion wires that can be elastically deformed,
Each of the plurality of extension wires has one end fixed to the diaphragm along the outer edge of the diaphragm and spaced apart from each other, and the other end of each of the extension wires is integrated into one place. It is curved so as to be separated from each other toward one end side from the end side,
The operation unit includes an operation ring through which the plurality of extension wires are inserted, and an operation ring support that supports the operation ring at a predetermined position between one end and the other end of the plurality of extension wires. And
The operation ring, when supported on one end side of the plurality of extension wires, elastically deforms one end side of the plurality of extension wires in a direction approaching each other. Replacement device. The diaphragm take-out means has one end connected to the diaphragm and the other end arranged outside the gas pipe through the first communication hole, and installed outside the gas pipe. The gas replacement device in a gas pipe according to claim 1, further comprising a reel capable of winding the cable body from the other end side.

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