JP3447349B2 - Pipe connection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case in which an outer peripheral surface of an existing pipe is surrounded in a liquid-tight or air-tight manner by being divided into a plurality of divided cases which can be mounted on the outer peripheral surface of the existing pipe in a radial direction. together are, new tubing to the case are connected by interposing a sealing material, the existing pipe and the new tubing is directed to tubing connection structure are communicated with each other via an opening formed in the existing pipe in to case .

[0002]

BACKGROUND OF THE INVENTION冒記tubing connecting structure, conventionally, as shown in FIG. 8, the case 01 surrounding the existing pipe A, above
It is divided into two division cases 02 and 03 in the downward direction, and the upper side
The split case 02 has a connecting pipe part with a connecting flange.
04 is projected, and the connecting pipe section 04 is connected.
The connection flange is connected to one end of the new pipe 05.
Flange is sandwiched with sealing material and fixedly connected with bolts and nuts
Has been done .

[0003]

Therefore, with the flange
Since the outer size of the upper split case 02 provided with the pipe connection portion 04 is large , if the excavation volume at the construction site increases.
If other existing pipes or structures are arranged near the pipe connecting portion 04 side of the case 01 , the existing pipes or structures are an obstacle, and the new pipes 05 are cased. 0
1 has the drawback that it is difficult to connect, and on the contrary , newly installed in case 01
After connecting the pipes 05 , the pipe connection part 0 of the case 01
There is a drawback that it is difficult to place another new pipe or structure near the 4th side. Furthermore, the connecting pipe portion projecting from the upper split case 02
04 connecting flange and new pipe 05 connecting flange
However, it is fixed so that it cannot move relative to it via the bolts and nuts.
Since it is connected, it bends due to earthquakes, uneven settlement, etc.
When an external force in the direction is applied, this external force acts on the connecting pipe 04.
There is a possibility of causing damage such as cracks by concentrating on the base part.
It

The present invention has been made in view of the above circumstances, and a first problem is to devise a connection structure of a newly installed pipe to the case, so that the outer shape of the side of the case to which the newly installed pipe is connected. With a simple structure while reducing the size
Improves seismic resistance at the connection between the case and new pipes
The second point is to provide a tubing connection structure that can
The problem with this is to devise a connection structure for the case of new pipes.
The outer shape of the side of the case to which the new pipes are connected
At the same time reducing the dimensions, connecting the case and new tubing
Pipes that can improve the earthquake resistance and durability of parts
The point is to provide a connection structure.

[0005]

According to claim 1 of the present invention
Characterizing construction, the case surrounding the outer peripheral surface of the existing pipe in a liquid-tight or gas-tight state, with being divided into a plurality of divided cases can be mounted in the radial direction with respect to the outer circumferential surface of the existing pipe, Ke
With a pipe connection structure in which a new pipe is connected to the base with a sealing material having elasticity interposed between the existing pipe and the new pipe, and the two are communicated through the opening formed in the existing pipe in the case . there are, across the new tubing from the radial direction between the separate casing which are connected to each other, the connection portion is set to connect the new tubing to casing
The new pipes and case are sealed together
The material is elastically deformed so that it can be relatively swung .

[0006]

[Operation] New pipes are connected to the divided cases that make up the case
If you do so, do not put it in the connection part provided between the divided cases.
The new pipes from the radial direction with a sealing material sandwiched between them.
Since it can be connected in the state of
The connecting pipe with the connecting flange
You don't have to. Moreover, new pipes connected to the case
Is configured to be capable of relative swing by elastic deformation of the sealing material.
Therefore, the external force in the bending direction may be increased due to an earthquake or uneven settlement, etc.
Even if it acts, the external force of the new pipes relative to the case
It can be damped by rocking.

[0007]

Therefore, the connection of the new pipes to the case
Connecting the new pipes by devising the structure as described above
The outer dimensions of the case on the
Continuation of compact construction and improvement of excavation work efficiency at construction sites
At the same time as trying to improve, the connection between the split case and the new pipe
A simple structure that utilizes the elastic deformation of the sealing material interposed between
Due to structural improvements, the resistance of the connection between the case and the new pipes has been improved.
Seismicity can be improved .

[0008]

According to claim 2 of the present invention.
The characteristic structure is that the outer peripheral surface of the existing pipe is enclosed in a liquid-tight or air-tight state.
The case is attached to the outer peripheral surface of the existing pipe from the radial direction.
It is divided into multiple possible split cases and
The new pipes are connected to the base with the sealing material sandwiched between them and the existing pipes.
New pipes are inserted through the opening formed in the existing pipe in the case.
Connected to each other with a pipe connection structure
The new pipes are sandwiched between the divided cases, which are
If there is a connection part that connects the new pipes to the case
In both cases, the new pipes and case are the parts that are formed in the connection part.
The point is that they can be relatively oscillated along a sphere .

[0009]

[Operation] New pipes are connected to the divided cases that make up the case
If you do so, do not put it in the connection part provided between the divided cases.
The new pipes from the radial direction with a sealing material sandwiched between them.
Since it can be connected in the state of
The connecting pipe with the connecting flange
You don't have to. Moreover, new pipes connected to the case
Can be relatively swung along the partial spherical surface formed on the connection part
Because it is composed of
Even if an external force is applied to the case,
It can be damped by the relative swing of the newly installed pipes.
By receiving the load of tubing on the partial spherical surface of the connection,
Damage to the sealing material can also be suppressed.

[0010]

Therefore, the connection of the new pipes to the case
Connecting the new pipes by devising the structure as described above
The outer dimensions of the case on the
Continuation of compact construction and improvement of excavation work efficiency at construction sites
At the same time as trying to improve, the part formed on the connecting part of the split case
The case and new pipes can be swung relative to each other along the sphere.
By configuring it, it can be connected to the case and new pipes.
It is possible to improve earthquake resistance and durability .

[0011]

[First Embodiment] FIG. 1 to FIG. 4 show an example of newly installed pipes in a cast iron tubular case 1 which surrounds an outer peripheral surface of an existing water pipe A made of cast iron in a watertight state. The cast iron flange short pipe B is the sealing material S2.
A pipe connection structure in which the existing water pipe A and the flange short pipe B are connected with each other through the opening 2 and communicated via an opening 2 formed by cutting off a part of the existing water pipe A in the case 1. Show. The case 1 is divided into two upper and lower split cases 3 and 4 with a horizontal plane including the pipe axis X of the existing water pipe A and the pipe axis Y of the flange short pipe B sandwiched between the two cases. The outer peripheral surface of the pipe A is mounted and fixed in the radial direction.

In each of the divided cases 3 and 4, a half-divided cylinder portion 5 surrounding the outer peripheral surface side of the existing water pipe A and a rubber first seal which is annularly adhered to the outer peripheral surface of the existing water pipe A. The first collar portion 6 into which the material S1 is fitted, the second collar portion 8 into which the rubber second seal material S2 that is annularly adhered to the outer peripheral surface of the flange short pipe B is fitted, and the rubber Third sealing material S3
And a flange 9 into which the flange short pipe B is fitted, and the second brim portion 8 is formed with a peripheral groove 7 into which the retaining collar 13 formed in the flange short pipe B enters. Y
The relative water slidable range is regulated along the direction, and the existing water pipe A and the flange short pipe B, in which the pipe axes X and Y are arranged at the same level in the horizontal direction, are divided into upper and lower split cases 3. , 4 are sandwiched between the upper and lower split cases 3 and 4, which are fixed by bolt connection between the flanges 9, and the second flange portions 8 of the upper and lower split cases 3 and 4 are connected to each other. It is configured as a connecting portion that connects the flange short pipe B to the case 1 while sandwiching the pipe B from the radial direction.

As shown in FIG. 1, the inner diameter d of the second collar portion 8
Is formed to have a larger diameter than the outer diameter D of the flange short pipe B in the portion sandwiched by the second flange portion 8, and the inner peripheral surface of the second flange portion 8 is separated from the outer peripheral surface of the flange short pipe B. The flange short pipe B is sandwiched between the upper and lower second brim portions 8 with the second sealing material S2 interposed therebetween, and the flange short pipe B is relatively moved along the pipe axis Y direction of the flange short pipe B. It is connected so that it can slide and can relatively swing due to elastic deformation of the second seal material S2.

The first seal material S2, the second seal material S2, and the third seal material S3 are integrally connected. In the upper divided case 3 of the divided cases 3 and 4, a construction opening 10 for forming an opening 2 in the existing water pipe A,
A flange lid 11 that can open and close the construction opening 10 is provided, and when the lower split case 4 is cut away from a part of the existing water pipe A to form the opening 2, chips and the like are removed from the existing water pipe. A
A drain cock 12 is provided for discharging the tap water leaking from the case to the outside of the case.

Next, the existing water pipe A buried in the ground
The method of branching and connecting the new water pipe C through the case 1 and the flange short pipe B in the uninterrupted water state in which the flow of tap water is not stopped will be described with reference to FIGS. After excavating the pit P at the branch connection point of the new water pipe A to expose the existing water pipe A and cleaning the outer peripheral surface thereof, the lower half of the first seal material S1 and the second seal material S2, and the The lower split case 4 into which the sealing material 3 is fitted is inserted into the lower side of the existing water pipe A, and is attached to the outer peripheral surface of the existing water pipe A as shown in FIG. The upper half of the sealing material S1 is wound around the outer peripheral surface of the existing water pipe A and connected in an annular shape.

Next, the flange short pipe B is fitted into the second collar portion 8 of the lower split case 4, and the retaining collar 13 is fitted into the circumferential groove 7.
After entering, and winding the upper half of the second seal material S2 around the outer peripheral surface of the flange short pipe B and connecting them in an annular shape, the upper half of the first seal material S1 and the second seal material S2 and the third seal material S3. While fitting and on the upper split case 3 side, the upper split case 3 is attached to the outer peripheral surface of the existing water pipe A, the flanges 9 are connected by bolts, and as shown in FIG. Is watertightly connected to the existing water pipe A and the flange short pipe B.

Next, a new water pipe C previously arranged along a predetermined route is connected to the flange short pipe B, and a sluice valve E is provided on the outer peripheral portion of the flange 15 formed on the outer periphery of the construction opening 10. Lock and fix with bolts, and as shown in Fig. 5 (C),
A perforation case G equipped with a perforation device F is fixed to the gate valve E.

Next, the sluice valve E is opened, a cutter H having a cutting diameter larger than the outer diameter of the existing water pipe A is inserted into the case 1, and as shown in FIG. After cutting a part of the pipe A into a ring shape to form the opening 2, the cutter H
6 is pulled up into the perforation case G together with a section of the existing water pipe A, the sluice valve E is closed, and as shown in FIG. The work case K in which the shaft J is held so that it can be raised and lowered is fixed to the gate valve E.

Next, the sluice valve E is opened, and as shown in FIG. 6F, the flange lid 11 is pressed against the flange 15 inside the sluice valve E, and is fixed by a bolt screwed from the lower surface side of the flange 15. Then, turn the operating shaft J to rotate the flange lid 11
When the sluice is removed and the sluice valve E and the work case K are removed, the new water pipe C is branched and connected to the existing water pipe A through the case 1 and the flange short pipe B as shown in FIGS. 1 to 4. To be done.

Second Embodiment FIG. 7 shows an embodiment in which the flange short pipe B is sandwiched between the upper and lower split cases 3 and 4 so as to be relatively movable along the partial spherical surfaces 16 and 17, and the outer circumference is shown. A partial spherical flange 18 whose surface is formed into a ring-shaped partial spherical surface 16 is formed on the connection end side of the flange short pipe B with respect to the case 1, and extends over the second flange portion 8 of both the upper and lower divided cases 3 and 4. , A partial spherical groove 19 whose inner peripheral surface is formed in a ring-shaped partial spherical surface 17 and in which the second sealing material S2 is fitted.
Insert the partial spherical brim 18 in 9 and attach the flange short pipe B.
A connecting portion is configured to be sandwiched between the upper and lower split cases 3 and 4 so as to be relatively swingable along the partial spherical surfaces 16 and 17, and to connect the flange short pipe B to the case 1 in a state where the flange short pipe B is prevented from coming off. Other configurations are similar to those of the first embodiment.

Other Embodiments 1. The pipe connecting structure according to the present invention is not limited to the pipe connecting structure of a water pipe, and may be a pipe connecting structure such as a sewer pipe or a gas pipe, and the application of the fluid transport pipe to be applied is not particularly limited. . 2. The case surrounding the existing pipe is not limited to the case additionally provided with the construction opening as shown in the embodiment, for example,
A perforated case may be fixed to a sluice valve as a new pipe connected to the case, and an opening may be formed in an existing pipe in the case. 3. The case surrounding the existing pipe is not limited to being divided into a plurality of divided cases in the vertical direction, and may be divided into a plurality of divided cases in the horizontal direction. 4. The newly installed pipes may be various valves in addition to various pipes and pipe joints. 5. The new pipes may be connected to take a branch from the existing pipe or may be connected to change the pipeline. 6. The new pipes may be connected so as to be relatively movable only in the axial direction of the flow path axis of the new pipes. 7. The opening formed in the existing pipe may be formed in an uninterrupted state in which the flow of the fluid in the existing pipe is not stopped, or may be formed by stopping the flow of the fluid in the existing pipe. 8. The opening formed in the existing pipe may be a through hole formed in the pipe wall of the existing pipe. 9. A valve body capable of opening and closing the opening formed in the existing pipe may be mounted in the case. 10. The material of the existing pipes, the case, and the new pipes that constitute the pipe connecting structure according to the present invention is not limited to metal, and may be synthetic resin, hard rubber, or the like.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 Partial cross-sectional side view

FIG. 2 is a partially sectional front view.

FIG. 3 is a partially omitted plan view

FIG. 4 is a partial sectional plan view showing a flange surface.

FIG. 5 is a schematic diagram showing a connection construction method.

FIG. 6 is a schematic diagram showing a connection construction method.

FIG. 7 is a partial sectional side view showing a second embodiment.

FIG. 8 is a side view showing a conventional example.

[Explanation of symbols]

1 Case 2 Opening 3 Split Case 4 Split Case 8 Connection 16 Partial Spherical 17 Partial Spherical A Existing Pipe B New Pipe S2 Sealant X Pipe Shaft Core

Claims (2)

(57) [Claims] 1. The outer peripheral surface of the existing pipe (A) is liquid-tight or air-tight
The case (1) that surrounds theExisting pipeOn the outer peripheral surface of (A)
On the other hand, a plurality of split cases (3,
It is divided into 4),CaseNewly installed pipe in (1)
Type (B)ElasticConnection with a sealant (S2) in between
IsExisting pipeWith (A)New pipes(B) isCase
Through the opening (2) formed in the existing pipe (A) in (1)
A tubing connection structure in which Between the split cases (3,4) that are connected to each otherNew pipes
Sandwiching (B) from the radial direction,New pipes (B)ToCase
The connection part (8) connecting to (1)It is provided
The newly installed pipe (B) and the case (1) are
It is configured to be able to relatively swing by the elastic deformation of 2).Pipe connection
Continuation structure. 2. The outer peripheral surface of the existing pipe (A) is liquid-tight or air-tight
The case (1) that surrounds the existing pipe (A) on the outer peripheral surface of the existing pipe (A)
On the other hand, a plurality of split cases (3,
It is divided into 4) and a new pipe is installed in the case (1).
Type (B) is connected with the sealing material (S2) in between, and the existing pipe
(A) and the new pipe (B) are the existing pipes in the case (1)
It is communicated through the opening (2) formed in (A)
A pipe connecting structure, in which new pipes are provided between the split cases (3, 4) connected to each other.
Inserting (B) from the radial direction, the case of the new pipe (B)
A connection part (8) for connecting to (1) is also provided.
The new pipes (B) and the case (1) are connected to each other at the connection part (8).
Relative swing along the partial spherical surface (16, 17) formed on the
A tubing connection structure that is configured to be possible.