JPH03260497A - Fluid transport path varying method and baffle member for use in this construction method - Google Patents

Abstract

PURPOSE:To suppress increase in the flow path resistance by incorporating a method for changing the path leading to an existing fluid transport pipe and a new fluid transport pipe, inserting a baffle member to change neatly the flow direction leading to the existing fluid transport pipe and new fluid transport pipe from the opposite end opening of a cylindrical member, and blocking the other end opening with a lid. CONSTITUTION:A cylindrical member B to which a new fluid transport pipe C is connected, is fixed to an existing fluid transport pipe A liquid-tightly, and a through hole (a) is formed in the pipe wall by a cutting device 7 in the condition that the stream is not interrupted. One of the flow paths of this existing fluid transport pipe A and the opposite end opening b2 are blocked to change the fluid transport path to a path leading to the existing pipe A and new pipe C. A baffle member 12 to rectify the fluid stream is formed fast in a single piece with the baffle surface 13 which changes the flow direction neatly, and this baffle member 12 is inserted from the other end opening b2 followed by fixation with a lid which blocks the opposite end opening b2. As a result, increase in the flow path resistance can be suppressed simply.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for connecting an opening at one end of a cylindrical body to which a newly installed fluid transport pipe is connected from the radial direction to a peripheral wall of an existing fluid transport pipe. A cutting device fixed in a liquid-tight or air-tight state in a position where the axial center of the cylindrical body and the axial center of the existing fluid transport pipe intersect or almost intersect, and inserted from the opening on the other end side of the cylindrical body. A through hole is formed in the peripheral wall of the pipe in an uninterrupted state while maintaining fluid circulation, and one side of the flow path of the existing fluid transport pipe facing the through hole and an opening on the other end side of the cylindrical body. A method for changing a fluid transport route, in which the fluid transport route is changed to a route spanning the existing fluid transport pipe and the new fluid transport pipe via the cylindrical body, and the fluid transport route is changed. It relates to a rectifying member used in the construction method.

[Conventional technology]

The above-mentioned fluid transport route modification method changes the fluid transport route in an uninterrupted state while maintaining fluid circulation.
As shown in Fig. 7, a cylindrical body (OB) is fixed to the peripheral wall of the existing fluid transport pipe (OA) in a liquid-tight or air-tight manner.
By effectively utilizing the fluid transport path, the existing fluid transport pipe (OA) and the new fluid transport pipe (QC
), and the cylindrical body (OB) itself is utilized as part of the fluid transport path. This method involves connecting a flow path switching valve to the existing fluid transport pipe within this casing in the above-mentioned uninterrupted state, and then removing the casing and connecting the new fluid transport pipe to the valve to change the fluid transport route. It has the advantage of being easy to construct compared to other models, and it also has the advantage that the cylindrical body (OB) is
Since the cylindrical body (O
B) There is an advantage that it is easy to form a through hole (Oa) in the pipe peripheral wall with a cutting device inserted from the other end side opening (OB2), but conventionally, the existing fluid transport pipe (OA) facing the through hole (Oa) One side of the flow path and the other end side opening (Obz) of the cylindrical body (OB)
In order to close the area, a lid (02) having a flat pressure-receiving surface (01) is used to close the area.

[Problem to be solved by the invention]

For this reason, since the existing fluid transport pipe portion (OA, ) blocked by the lid (02) and the inner peripheral surface of the cylindrical body portion (OB1) are exposed in the middle of the fluid transport route after the change, flow path resistance is reduced. There are drawbacks that tend to increase.

In order to solve this drawback, for example, as shown by the imaginary lines in FIG. Although it is conceivable to provide a rectifying member (012), there is a new drawback that it takes time and effort to install the rectifying member (012) to the existing fluid transport pipe (OAI) and the cylindrical body portion (OB1).

The present invention has been made in view of the above-mentioned circumstances, and focuses on the fact that one of the openings of the cylindrical body is closed with a lid, and a fluid transport path that can suppress an increase in flow resistance through simple construction. The purpose of this invention is to provide a modified construction method and a rectifying member used in the construction method.

[Means to solve the problem]

The characteristic structure of the method of the present invention for achieving the above object is that, in the above-mentioned fluid transport route modification method, A. a rectifying member that rectifies a series of fluid flow directions extending between the existing fluid transport pipe and the new fluid transport pipe; In the configuration of A above, the cylindrical body is inserted through the opening on the other end side and fixed with a lid that closes the opening on the other end side.

Further, the characteristic configuration of the rectifying member used in the above-mentioned fluid transport route modification method is as follows: B. rectifying a series of fluid flow directions extending between the existing fluid transport pipe and the new fluid transport pipe via the cylindrical body; It is in the above structure B that the surface is integrally formed.

[For production]

a. With the configuration of A above, a series of fluid flow directions between the existing fluid transport pipe and the new fluid transport pipe can be rectified without performing any special processing or work on the existing fluid transport pipe portion or the cylindrical body portion. The flow regulating member is fixed with a lid for closing the opening at the other end of the cylindrical body.

b. With the configuration of B above, a rectifying member that rectifies the direction of fluid flow between the existing fluid transport pipe and the cylindrical body, and a rectifying member that rectifies the direction of fluid flow between the cylindrical body and the new fluid transport pipe. They can be fixed more efficiently than when they are fixed separately.

〔Effect of the invention〕

The fluid transport route changing construction method according to claim 1 can suppress an increase in flow path resistance between an existing fluid transport pipe and a newly installed fluid transport pipe with simple construction due to the effect of a.

The fluid transport route changing method according to claim 2 includes inserting the rectifying member into the cylindrical body and blocking one of the channels of the existing fluid transport pipe facing the through hole with the rectifying member.
The flow path can be easily closed by effectively utilizing the rectifying member.

In the flow regulating member according to the third aspect of the present invention, the operation of installing the flow regulating member can be simplified by the action of the slot.

The flow regulating member according to claim 4 is connected to a lid that is attached and fixed to the opening on the other end side of the cylindrical body and closes the opening on the other end side. Can be fixed,
The work of installing the rectifying member can be further simplified.

In the flow regulating member according to claim 5, since the flow regulating surface is formed in a series of cylindrical shapes, for example, a flow regulating member having a flow regulating surface extending between an existing fluid transport pipe and the cylindrical body, and a flow regulating member having a flow regulating surface extending between the existing fluid transport pipe and the cylindrical body, Compared to a system in which a rectifying member having a rectifying surface extending between the cylindrical body and the cylindrical body is connected by a connecting member, and the flow is rectified mainly on the inner peripheral surface of the cylindrical body, the existing fluid transport pipe and the new fluid transport pipe are The flow direction of the fluid can be smoothly rectified.

Since the flow regulating member according to the sixth aspect is provided with a sealing surface portion that closes one of the channels of the existing fluid transport pipe facing the through hole, it is possible to simplify the work of closing the existing fluid transport pipe.

[First Embodiment] Figures 1 to 5 show that while maintaining water flow through the existing water pipe (A), which is an existing fluid transport pipe that has already been buried almost horizontally underground, A cylindrical body that forms a through hole (a) in the peripheral wall of the existing water pipe (A) and is connected to the through hole (a) in a non-water cutoff state that prevents water from leaking out of the pipe. A new water pipe (C), which will be newly buried as a new fluid transport pipe, is connected through (B), and one side of the flow path of the existing water pipe (A) is blocked to create a water flow route for tap water. A working device is shown for changing the water flow route to an existing water pipe (A) and a new water pipe (C) via a cylindrical body (B).

This work device includes a pipe section (8) with a circular cross section as a cylindrical body to which a new water pipe (C) is connected, and this pipe section (B).
) to the connection case (E) that fixes the opening (b1) at one end in a watertight manner to the peripheral wall of the existing water pipe (A), and the opening (b2) at the other end of the pipe (B). A work gate valve (F) that can be detachably attached to the gate, and this gate valve (F)
It is constructed by providing a bowl-shaped sealing case (G) for work that is detachably attached to the workpiece.

The connection case (E) is composed of a half-cylindrical part (e) that is split into two in the circumferential direction and is fitted onto the existing water pipe (A),
A sealing material (2) is interposed between the inner circumferential surface of both ends of the half-tubular part (e) and the outer circumferential surface of the existing water pipe (A), and between the split surfaces of the half-tubular part (e). has been done.

The pipe section (B) is formed with a communication connection port (3) for the newly installed water pipe (C), and has a connecting pipe (4) bent in a dogleg shape for connecting the newly installed water pipe (C). This communication connection port (
3) is integrally connected to the pipe portion (B) from a radial direction perpendicular to the axis (X1) to form a pipe connector (J).

One end opening (bl) side of the pipe portion (6) is integrally connected to one of the half-tube portions (e) of the connection case (E), and the connection case (E) is connected to the existing water pipe ( By fitting onto A), the pipe part (B) is fixed in a position where its axis (XI) and the horizontal axis (x2) of the existing water pipe (A) are almost orthogonal, and By fixing the part (B) in a state where its axis (X1) is inclined by about 45'' with respect to the vertical, the communication connection port (3) is held in an inclined position facing downward,
The free end side of the connecting pipe (4) bent in a dogleg shape is laid almost horizontally.

The gate valve (F) has an opening (b2) on the other end side of the pipe portion (B).
) is mounted on the connecting flange (5) formed on the side, and is connected and fixed to the pipe portion (B) by pressing a bolt (6) against the connecting flange (5).

The sealing case (G) is connected to the gate valve (F) by a flange, and there are two types: one for perforation and one for installing a lid.

As shown in Fig. 1, the drilling case (G1) has an operating shaft (7a) that also serves as a drive and is equipped with a cutter (7) as a cutting device at the lower end on the ceiling. The operating shaft (7a) is mounted on the ceiling with a driving device (8) for rotating and sliding the operating shaft (7a).

The lid installation case (G2), as shown in FIG.
In the ceiling part, an operating shaft (9a) having a lid (9) removably attached to its lower end is held so as to be slidable up and down together with the M (9).

As shown in FIGS. 3 and 5, the lid (9) has a rectifying surface (which rectifies the flow direction of a series of tap water between the existing water pipe (A) and the new water pipe (C)), as shown in FIGS. A rectifying member (12) formed in a series of curved cylindrical shapes is provided in series.

The rectifying member (12) connects the existing water pipe (^) and the pipe section (8
), and a first rectifying member (12a) having a curved tubular first rectifying surface (13a) that rectifies the flow across the pipe section (B) and the new water pipe (C); The second rectifying member (12b) having a second rectifying surface (13b) is connected in series, and each rectifying surface (13a)
, (13b) are connected to each other around the axis (x1) of the tube portion (B) with a phase difference of about 90°.

On the outer periphery of the rectifying member (12), a first sealing material (14a) made of rubber is pressed against the inner peripheral surface of the through hole (a), and a rubber first sealing material (14a) is pressed against the inner peripheral surface of the existing water pipe (A). The second sealing material (14b) made of
A third sealing material (14c) made of rubber is pressed around it, and a fourth sealing material (14d) made of rubber is pressed around the mouth part (b2) on the other end of the inner peripheral surface of the tube part (B). and a sealing surface portion (14) that closes one of the channels of the existing water pipe (A) facing the through hole (a) with the first sealing material (14a) and the second sealing material (14b). configured.

Next, using the work equipment configured as described above, the water supply route is continuously connected to the existing water pipe (A) and the new water pipe (C) via the pipe section (B). The method for changing the fluid transport route depending on the water state will be explained in order.

B. As shown in Figure 1, excavate a pit (P) that surrounds the existing water pipe (A) that is buried underground, and attach a case (E) to the existing water pipe (A). externally, and connect the tube part (B
) with the connecting pipe (4) facing downward, and insert the pipe part (
B) is fixed in an inclined position with its axis (Xl) inclined at approximately 45 degrees with respect to the vertical, with the communication connection port (3) facing downward; The new water pipe (C
) and connect the gate valve (F) to the flange (5).

Note that the newly installed water pipe (C) is laid in advance almost horizontally along a predetermined route.

Port 1 Next, as shown in FIG. 1, a perforation case (G1) is attached to the gate valve (F).

Then, insert the cutter (7) between the gate valve (F) and the cylindrical portion (B).
Lower the existing water pipe (A) to the cutting work position.
After drilling the through hole (a) in the drilling case (G1)
Close the gate valve (F) and open the drilling case (Gl).
) from the gate valve (F).

Note that the cut piece after drilling the through hole (a) in the existing water pipe (A) is pulled up into the drilling case (Gl) together with the cutter (7).

C9 Next, as shown in Figure 2, install the lid installation case (G2
) to the gate valve (F).

20 Next, open the gate valve (F) and as shown in Figure 3,
Lower the lid (9) and insert the rectifying member (12) into the pipe section (B), so that the first rectifying surface (13a) faces the axial direction of the existing water pipe (A), and the second rectifying surface ( 13a) to the connecting pipe (4)
The lid (9) is temporarily fixed to the connecting flange (5) with bolts (15) that have been previously screwed onto the connecting flange (5) while facing in the axial direction of the lid (9).

With this temporary fixation, the first sealing material (14a) is attached to the through hole (a).
The second sealing material (14b) is attached to the inner peripheral surface of the existing water pipe (A
), and a third sealing material (14c) is placed around the communication connection port (3) on the inner peripheral surface of the pipe portion (B).
d) are respectively pressed around the opening (b2) on the other end side of the inner circumferential surface of the pipe portion (B).

E1 Next, release the fixation of the lid installation case (G2) to the gate valve (F) and attach the lid installation case (G2) to the operating shaft (9a).
) along the operating shaft (9a) and in that state! (1
2), remove the lid installation case (G2), remove the gate valve (F) from the connecting flange (5), and remove the lid (12) as shown in Figure 4. Secure it to the connection flange (5).

Next, as shown in Fig. 3, the existing water pipe (A) portion that is blocked by the sealing surface portion (14) is cut to open the opening (1).
1) and a lid (16) that closes this opening (11).
) is attached and fixed to the connection case (E) via the connector (17).

By following the steps from A to A above, the water supply route for tap water is changed, and by backfilling the pinto (P), the new water pipe (C) is buried at a predetermined depth (h), as shown in Figure 4. be done.

[Second Embodiment] As shown in FIG. 6, the rectifying member (12) in the first embodiment is constructed separately from the lid (9), and the rectifying member (12)
may be engaged with the lid (9) in a non-rotating state, and the flow regulating member (12) may be fixed so as to be sandwiched between the connecting flange (5) and the lid (9).

[Other Examples]

(2) The flow regulating member may not be provided with a sealing surface portion that closes one of the flow paths of the existing pipe.

In this case, the flow path is temporarily blocked by inserting a valve body without water interruption using a conventionally known method, and the opening formed by cutting the blocked flow path side of the existing pipe is closed with a lid body. , remove the valve body and insert the flow regulating member.

(2) The fluid transported by the fluid transport pipe is not limited to tap water, but may also be sewage, other known liquids, or gases.

(2) Although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the fluid transport route changing construction method according to the present invention and a flow regulating member used in the construction method, and FIG. 1 is a cross-sectional view of the main part, and FIGS. FIG. 4 is a sectional view of the main part as seen from the viewing direction, FIG. 5 is a sectional view of the main part, and FIG. 5 is a perspective view of the main part. FIG. 6 is a sectional view of a main part showing another embodiment, and FIG. 7 is an explanatory diagram of a conventional example. (7)... Cutting device, (9)... Lid,
(12)... Rectifying member, (13)...
Rectifying surface, (14)... Seal surface part, (a)...
...Through hole, (A) ...Existing fluid transport pipe,
(bl), (bz)...opening, (B)...
...Cylindrical body, (C) ...New fluid transport pipe,
(XI), (X2)... Axis core.

Claims (1)

[Claims] 1. One end side opening (b_1) of the cylindrical body (B) to which the new fluid transport pipe (C) is connected in the radial direction is connected to the pipe peripheral wall of the existing fluid transport pipe (A). Then, the axis of the cylindrical body (B) (
X_1) and the axis (X_2) of the existing fluid transport pipe (A)
A through-hole ( a)
is formed in an uninterrupted state while maintaining fluid circulation, and the existing fluid transport pipe (
A) and the opening at the other end of the cylindrical body (B) (
b_2) in the non-flow condition, and the fluid transport path is connected to the existing fluid transport pipe (A) via the cylindrical body (B).
In the method for changing the fluid transport route to a route spanning the existing fluid transport pipe (A) and the new fluid transport pipe (C),
) and the new fluid transport pipe (C), a rectifying member (12) that rectifies a series of fluid flow directions is inserted from the other end side opening (b_2) of the cylindrical body (B), A fluid transport route changing method characterized by fixing the other end side opening (b_2) with a lid (9) that closes it. 2. Insert the flow regulating member (12) into the cylindrical body (B), and use the flow regulating member (12) to control one of the channels of the existing fluid transport pipe (A) facing the through hole (a). The method of changing the fluid transport route according to claim 1, wherein the fluid transport route is closed. 3. A flow regulating member used in the fluid transport route changing method according to claim 1 or 2, which connects the existing fluid transport pipe (A) and the new fluid transport pipe (C) via the cylindrical body (B). A rectifying member that is integrally formed with a rectifying surface (13) that rectifies a series of fluid flow directions. 4. A lid (which is attached and fixed to the other end opening (b_2) of the cylindrical body (B) and closes the other end opening (b_2).
9) The rectifying member according to claim 3, which is connected to the rectifying member. 5. The flow regulating member according to claim 3 or 4, wherein the flow regulating surface (13) is formed in a series of cylindrical shapes. 6. The existing fluid transport pipe (A) facing the through hole (a)
6. The rectifying member according to claim 3, further comprising a sealing surface portion (14) that closes one of the flow paths.