JP3133527B2 - Pipe cut covering - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for providing a fluid transport pipe having a fluid in the pipe, for example, a water pipe buried underground with a branch pipe, a valve or the like interposed in the middle thereof. The present invention relates to a pipe cut cover for covering a cut cut of the water pipe when a part of the water pipe is cut and removed in a state where water is not cut off and the inclusion is installed at the removal mark.

[0002]

2. Description of the Related Art Heretofore, a pipe cut cut by a fluid uninterrupted state of a fluid transport pipe has been left open, and there is no such pipe cut cover.

[0003]

The above-mentioned pipe cut in the pipe cutting in the state where the fluid in the pipe is not interrupted remains in the cut-off state, so that it cannot be avoided that it comes into direct contact with the fluid in the pipe. For example, in a fluid transport pipe that may corrode such as a water pipe, corrosion of the pipe starts from the pipe cut end that has not been subjected to any lining treatment, and rust is mixed with the fluid in the pipe, or the durability of the pipe itself is reduced. There is a problem of lowering.

Accordingly, it is an object of the present invention to solve the above-mentioned problems and to make it difficult to corrode a cut end of a pipe cut in a state where the flow of the fluid in the pipe is not stopped.

[0005]

In order to achieve this object, the pipe cut cover according to the present invention is characterized in that the pipe cut cover can be closely contacted along the annular cut of the fluid transfer pipe without interrupting the flow of the fluid in the pipe. An annular contact member for pressing the flexible annular seal member against the cut, the annular seal member is provided on a pressing surface of the annular contact member, and the annular contact member is provided on the cut side. A reaction force receiving member for receiving a reaction force accompanying the pressing is provided on the opposite side to the pressing surface of the annular contact member so that the reaction force receiving member can be close to and separated from the annular contact member, and the annular contact member and the reaction force receiving member are provided. A connecting mechanism is provided for connecting the annular contact member and the reaction force receiving member along the connecting direction so as to be capable of being separated from each other.

[0006] In order to constitute the connecting mechanism, a pair of flexible connecting members are provided so as to be opposed to each other from the annular contact member to each end of the reaction force receiving member.
The concave portions may be formed in curved shapes facing each other.

[0007]

According to the characteristic structure of the pipe cut cover according to the present invention, the pipe cut cover is arranged in a state where the annular seal member faces the cut of the fluid transport pipe cut in a state where the fluid in the pipe is not interrupted. By separating the annular contact member and the reaction force member, the annular seal member is pressed against the pipe cut in close contact with the pipe cut in a state where the reaction force is secured by the reaction force member, and covers the pipe cut so as to cover the fluid in the pipe. Can be disconnected. That is, by covering the pipe cut with the annular seal member, it is possible to suppress corrosion from the pipe cut.

[0008] In order to constitute the connecting mechanism, a pair of flexible connecting members are provided so as to face each other from the annular contact member to each end of the reaction force receiving member.
If the concave portions are formed in a curved shape facing each other, the pressing force is applied in a direction in which the curved top portions of both the connecting members are brought closer to each other, so that the elastic force of the two connecting members causes the annular contact member to react with the annular contact member. Both ends of the connecting member connected to the member are displaced in a direction away from each other, so that the annular seal member can be pressed against the tube cut and brought into close contact, while the structure of the tube cut cover is simplified. So you can
The resistance to the fluid in the pipe is reduced, and the pipe cut can be covered in a state where the flow of the fluid in the pipe is not hindered.

[0009]

Thus, according to the pipe cut covering device of the present invention, the pipe cut can be lined without stopping the flow of the fluid in the pipe, and the corrosion from the pipe cut can be suppressed. Can be improved in durability.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a pipe cut cover according to the present invention.

FIG. 3 shows a water pipe 1 as an example of a fluid transport pipe.
And a connection case 3 attached and fixed so as to form a closed space 2 with the outer peripheral surface of the water pipe 1.
Connection between the closed space 2 and the inside of the water pipe 1, a branch port 4 formed by piercing the water pipe 1, and the connection case 3 connected to the closed space 2 in a communicable state with the closed space 2. And another water pipe 1A attached and fixed to the mouth 5.

[0012] The pipe cut cover C of the present invention comprises the branch port 4
Before the detailed description, an operation procedure for forming the above-mentioned branch portion in the water pipe 1 in a water-free state will be described.

[1] As shown in FIG. 4A, the connection case 3 is attached to the water pipe 1 and the connection case 3
Then, the perforating work case 6 in which the cutter 7 is installed and the branch water pipe 1A are connected. (The drilling work case 6
Is a cylindrical case 6b with a lid, and the case 6b with the lid.
A gate valve 6a for opening and closing the inner space of the connection case 3 and the connection case 3 so as to be freely circulated is provided. )

[2] As shown in FIG. 4B, the cutter 7 is inserted and moved into the connection case 3 while rotating about the axis thereof to cut and remove the water pipe portion 1a.
Drilling. (The cut pieces are held and collected in the inner space of the cutter 7.)

[3] From connection case 3 to case 6 with lid
After the cutter 7 is pulled up to b, the gate valve 6a is closed, and as shown in FIG. 5C, the cutter 7 is replaced with the pipe cut cover C of the present embodiment, the gate valve 6a is opened, and the rotary shaft is opened. 9 is slid downwardly to push the lid 10 and the pipe cut cover C to a predetermined position of the connection case 3, and further press the pipe cut cover C in contact with the bottom of the connection case 3, thereby causing elasticity. The lid 10 is deformed and pressed against the pipe cut 4a to cover it, and the lid 10 is temporarily fixed by the temporary fixing bolts 8 provided in the connection case 3.

[4] As shown in FIG. 5D, after the perforating work case 6 is removed from the connection case 3, the lid 10 is fixed to the connection case 3 by the fixing ring 11, thereby completing the pipe connection.

The pipe cut cover C will now be described with reference to FIG.
As shown in FIGS. 2, 3, and 6, an annular contact member 13 for pressing an annular seal member 12 that can be closely contacted along the annular cut 4a of the water pipe 1 against the cut 4a is provided. The annular seal member 12 is attached to the pressing surface 13a of the annular contact member 13, and the annular contact member 13 is provided.
A reaction force receiving member 14 for receiving a reaction force caused by pressing against the cut 4a side is provided on the opposite side to the pressing surface 13a of the annular contact member 13 and is provided so as to be close to and separated from the annular contact member 13. A connecting mechanism J is provided to connect the contact member 13 and the reaction force receiving member 14 and to separate the annular contact member 13 and the reaction force receiving member 14 along the connection direction. .

The annular contact member 13 is provided with a curved pressing surface 13a along the cut 4a of the water pipe 1, and is provided between both curved end portions of the pressing surface 13a to connect the pressing surface 13a to each other. A first reinforcing portion 13b for reinforcing against deformation is provided integrally with the pressing surface 13a, and is formed of stainless steel. In addition, the pressing surface 13a and the first reinforcing portion 13 opposing the branch 4 of the water pipe 1 in a state where the pressing surface 13a is pressed against the cut 4a.
The opening b for circulation which allows the water of the water pipe 1 and another water pipe 1A to flow is separately provided at the part b. Also,
The annular sealing member 1 made of rubber is provided on the pressing surface 13a.
2 is attached.

The reaction force receiving member 14 is connected to the connection case 3.
A pair of curved receiving portions 14a that can freely contact the state along the inner peripheral surface
Is provided, between the curved end portions of each of the curved receiving portions 14a, and
The second reinforcing portion 1 which is located between the two curved receiving portions 14a and which is connected to each other to reinforce the bending receiving portion 14a against deformation.
4b is provided integrally with the two curved receiving portions 14a, and is formed of stainless steel. Further, the pressing surface 1 is also provided on the curved receiving portion 14a and the second reinforcing portion 14b.
As in the case of 3a and the first reinforcing portion 13b, the flow openings H are separately provided so that the branch flow path can be secured.

The connecting mechanism J includes the annular contact member 13
And two pairs of flexible connecting members 15 which are opposed to each other between the ends of the reaction force receiving member 14. Each of the connecting members 15 is formed in a curved shape by stainless steel, and in a state where the pipe cut cover C is arranged in the connection case 3, the concave portions of the respective connecting members 15 face each other along the up-down direction. So that the annular contact member 13
Both ends are fixed to the reaction force receiving member 14. The connecting member 15 disposed above has a convex portion fixed to the back surface of the lid 10 installed in the connection case 3.

According to the pipe cut cover C of the present embodiment, as the pipe cut cover C is lowered into the connection case 3 together with the lid 10, the projection of the lower connecting member 15 is connected. By contacting the bottom of the case 3 and further lowering the lid 10, the connecting members 15 at opposing positions are elastically deformed in a direction close to each other, and with the elastic deformation, the annular contact member 13 and the reaction force are deformed. The receiving member 14 can be separated from the other, and the reaction force receiving member 14 can be brought into contact with the inner peripheral surface of the connection case 3, and the annular contact member 13 can be brought into contact with the annular cut 4 a of the water pipe 1. The member 12 can be covered in close contact with the annular cut 4a.

[Another embodiment] Another embodiment will be described below.

<1> The pipe cut cover C is not limited to the shape described in the previous embodiment.
As shown in (a), the annular contact member 13 and the reaction force receiving member 1
The connecting structure of the connecting mechanism J to the connecting mechanism 4 may be a link structure, or the connecting mechanism J may be formed by a link structure as shown in FIG.

<2> Further, as another embodiment of the connecting mechanism J, as shown in FIG. 8A, a female member whose screw direction is opposite to each other Screw part 1
6 are formed, and bolts 17 for approaching / separating operation which can be screwed into the female screw portions 16 (each provided with a forward / reverse threading portion corresponding to the female screw portion 16) are screwed. By rotating the bolt 17 about its axis, the female screw portions 16 may be screwed in opposite directions to move the connecting members 15 closer to or away from each other. In this case, by providing another pair of connecting mechanisms J in the depth direction of the drawing, it becomes possible to prevent the pipe cut cover C from rotating together with the rotation of the bolt 17. Further, the tip of the bolt 17 is projected below the annular contact member 13 and the reaction force receiving member 14 so that the tip of the bolt 17 contacts the bottom of the connection case 3 to cover the pipe cut. The lower limit position of the tool C can be defined, and the fluid transport pipe 1
In a state where the vertical position of the pipe cut cover C with respect to the cut 4a is not changed, the annular contact member 13 and the reaction force receiving member 14 are separated from each other to cover the cut 4a. The positioning of the seal member 12 becomes easy.

<3> Therefore, the connecting mechanism J is not limited to the two connecting members 15 which are opposed to each other, and the concave portions are formed in curved shapes which are opposed to each other.
As shown in (b), the concave and convex portions of both connecting members 15 may be formed in a curved shape in which they are opposed to each other, and a bar-shaped body 18 that presses down both convex portions may be provided. According to this, the lower end portions of the annular contact member 13 and the reaction force receiving member 14 are brought into contact with the bottom of the connection case 3 so that the vertical position of the pipe cut cover C can be determined.

<4> The pipe cut cover C can be applied not only to the water pipe described in the previous embodiment but also to other pipes that need to cover the cut of the pipe. Are collectively referred to as a fluid transport pipe 1. It is also possible to install the fluid transport pipe 1 at a pipe cut 4a other than the T-shaped branch portion. As an example of the installation, as shown in FIG. When the valve V or the like is provided without stopping the pipe cutting, the pipe cut cover C may be arranged side by side so as to be able to be in close contact with the pair of pipe cuts 4a facing each other.

[0027] In the claims, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fluid cut-off pipe representing a pipe-cut covering device according to an embodiment, as viewed in a direction of an axis of a fluid transport pipe.

FIG. 2 is a cross-sectional view of a fluid cut-away pipe representing a pipe-cut covering device according to an embodiment, as viewed in the axial direction of the fluid transport pipe.

FIG. 3 is a sectional view taken along the line XX in FIG. 2 showing the pipe cut cover of the embodiment.

FIG. 4 is a process diagram showing a water pipe connection operation.

FIG. 5 is a process diagram showing a water pipe connection operation.

FIG. 6 is a perspective view showing a pipe cut cover of the embodiment.

FIG. 7 is a sectional view taken along the axis of a fluid transport pipe showing a pipe cut cover according to another embodiment.

FIG. 8 is a cross-sectional view of a fluid-transporting pipe axial direction showing a pipe-cut covering device of another embodiment.

FIG. 9 is a cross-sectional view of a fluid transport pipe as viewed from the side, showing another installation example of the pipe cut covering device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid transport pipe 4a Cut 12 Annular seal member 13 Annular contact member 13a Pressing surface 14 Reaction force receiving member 15 Connection member J Connection mechanism

Claims (2)

(57) [Claims] 1. An annular seal member (12) which can be closely contacted along an annular cut (4a) of a fluid transport pipe (1) without interrupting the flow of fluid in the pipe, with respect to the cut (4a). An annular contact member (13) for pressing is provided, and the annular seal member (12) is attached to a pressing surface (13a) of the annular contact member (13). A reaction force receiving member (14) for receiving a reaction force caused by pressing against the cut (4a) side is opposed to the annular contact member (13) on the side opposite to the pressing surface (13a), and is freely movable close to and away from the annular contact member (13). And connects the annular contact member (13) and the reaction force receiving member (14), and
A coupling mechanism (J) that can freely separate the annular contact member (13) and the reaction force receiving member (14) along the coupling direction.
A pipe cut covering device provided with. 2. A coupling mechanism (J) comprising a pair of opposed flexible connecting members (13) extending from the annular contact member (13) to each end of the reaction force receiving member (14). 1
5) The pipe cut cover according to claim 1, wherein 5) is provided, and the two connecting members (15) are formed in a curved shape in which the concave portions face each other.