JPH03260496A - Lid for blocking pipe end and fluid transport path varying method using it - Google Patents

Abstract

PURPOSE:To suppress increase in the flow path resistance with a simple means by providing a lid for blocking the pipe end wherein the fluid transport path is used to change the path leading to an existing fluid transport pipe and a new fluid transport pipe via a casing, and therein installing a flow baffle member conjugately with the lid body to be fitted at the opening of the fluid transport pipe. CONSTITUTION:A casing B to which a new fluid transport pipe C is connected, is fixed to an existing fluid transport pipe A, and a through hole (a) is formed in the pipe wall in the condition that the stream is not interrupted. One of the flow paths of this existing fluid transport pipe A is blocked with a valve element 9 temporarily, and that part of the existing fluid transport pipe A which was blocked, is cut off to form an opening 11, which is blocked with lid so as to change the fluid transport path. The body 12a of this lid 12 is equipped conjugately with baffle members 12b, 14b which are inserted in the fluid transport pipes A, B to make baffling of the stream. As a result, increase in the flow path resistance can be suppressed simply.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a pipe end blocker that is attached to an opening facing in the longitudinal direction of a fluid transport pipe formed near a branch part of the pipe to close the opening. The casing to which the new fluid transport pipe and the new fluid transport pipe are to be connected is fixed in a liquid-tight or airtight manner to the peripheral wall of the existing fluid transport pipe, and a through hole is formed in the pipe peripheral wall from the inside of the casing to prevent fluid flow. temporarily closing one of the flow paths facing the through hole of the existing fluid transport pipe with a valve body inserted into the existing fluid transport pipe from the through hole; After cutting the existing fluid transport pipe portion on the side of the blocked flow path to form an opening facing in the longitudinal direction of the pipe and closing the opening with a lid, the valve body is removed from the through hole to the casing side. The present invention relates to a fluid transport route changing method for changing the fluid transport route to a route spanning the existing fluid transport pipe and the new fluid transport pipe via the casing.

[Conventional technology]

Conventionally, the above-mentioned lid has a flat pressure-receiving surface (01), and as shown in FIG. It is attached and fixed to the opening (011) formed in the first fluid transport pipe (OK+) facing in the longitudinal direction of the pipe.
1) and connect the fluid transport path to the first fluid transport pipe (OK+
) and the second fluid transport pipe (OK2).

In addition, in the above-mentioned fluid transport route changing method, when changing the fluid transport route in an uninterrupted state while maintaining fluid circulation, as shown in Fig. In contrast, by effectively utilizing a casing (OB) that is fixed in a liquid-tight or air-tight state, the fluid transport path is connected to the existing fluid transport pipe (OA) and the new fluid transport pipe (QC) via this casing (OB). Change the route across the casing (
OB) itself as part of the fluid transport pathway,
For example, a flow path switching valve is connected to the existing fluid transport pipe in the uninterrupted state within a casing surrounding the existing fluid transport pipe, and then the casing is removed and a new fluid transport pipe is connected to the valve. Compared to construction methods that change the fluid transport route, it has the advantage of being easier to construct;
011) and a lid (01) equipped with a flat pressure receiving surface (01).
2) is blocked.

[Problem to be solved by the invention]

For this reason, in both the conventional lid and fluid transport route modification methods mentioned above, the lid and fluid transport route are changed midway through the fluid transport route. ! (01
2) The fluid transport pipe portion (OKi), (Ot+
Since the inner circumferential surface of +) is exposed, there is a drawback that flow path resistance tends to increase.

To solve this drawback, for example, as shown in phantom lines in FIGS. 9 and 10, it is necessary to
), (OA+), it is conceivable to provide a rectifying member (02) at the inlet facing the fluid transport path;
02), a new disadvantage arises in that it takes time and effort to install.

The present invention has been made in view of the above-mentioned circumstances, and focuses on the fact that the lid is attached and fixed to the fluid transport pipe, and the pipe end has a function of easily suppressing an increase in flow resistance. It is an object of the present invention to provide a closure lid and a fluid transport route changing method that can effectively suppress an increase in flow path resistance using this lid.

[Means to solve the problem]

In order to achieve the above object, the characteristic structure of the lid for closing the end of a tube according to the present invention is that, in the aforementioned lid, A. the lid body that is attached and fixed to the opening is inserted into the tube of the fluid transport tube; According to the configuration of A above, a rectifying member for rectifying the flow direction of the fluid at the branch portion is provided in series. Further, in the lid for closing a tube end having the configuration of A above, B: the flow regulating member is movably connected to the lid main body along the longitudinal direction of the tube; As described below, this is suitable for attaching the lid to the opening of the fluid transport pipe and changing the fluid transport route in the non-flow state.

Further, the characteristic structure of the fluid transport route changing method according to the present invention for achieving the above object is as follows: In the fluid transport route changing method, C1 the opening is closed with a pipe end closing lid according to claim 2. After that, the valve body blocking one of the flow paths facing the through hole of the existing fluid transport pipe is removed from the through hole toward the casing side.

[For production]

a. With configuration A above, the rectifying member can be provided within the fluid transport pipe by attaching and fixing the lid body to the opening without performing any special processing or work on the fluid transport pipe.

b. With the configuration of B above, the flow regulating member can be moved after the lid body is attached and fixed to the opening and the opening is closed.

C9 With the configuration of C above, even if one of the flow paths facing the through hole of the existing fluid transport pipe is temporarily blocked by the valve body and the lid is attached and fixed to the opening, the valve body cannot be used to transport the existing fluid. After the valve body is removed from the pipe, the flow regulating member can be inserted into the area where the valve body was removed.

〔Effect of the invention〕

The lid for closing the tube end according to the first aspect of the invention can easily suppress an increase in flow path resistance due to the effect of a.

In the pipe end closing lid according to the second aspect of the present invention, due to the effect of the door, the rectifying member can be easily installed at an optimal position within the fluid transport pipe in the fluid transport route changing method according to the third aspect.

In the fluid transport route changing method according to claim 3, due to the effect of C, the rectifying member can be provided at an optimal position within the fluid transport pipe, thereby effectively suppressing an increase in flow path resistance.

[First Example] Figures 1 to 6 show how tap water flows outside the pipe while maintaining water flow through the existing water pipe (A), which is an existing fluid transport pipe buried underground. A through-hole (a) is formed as a branch part in the peripheral wall of the existing water pipe (^), and a casing (B) is connected to this through-hole (a) in a state of no water outage that prevents leakage of water. A new water pipe (C) as a new fluid transport pipe is connected through the pipe, and one end of the flow path of the existing water pipe (A) is closed with a lid (12) for blocking the end of the pipe, and the tap water is A working device is shown for changing the water flow route to a water flow route that spans the existing water pipe (^) and the new water pipe (C) via the casing (B).

This work device includes a pipe section (B) with a circular cross section as a casing to which a new water pipe (C) is connected, and an opening (b,) at one end of this pipe section (B) to an existing water pipe (B). A connection case (E) that is fixed in a watertight manner to the peripheral wall of the pipe section (B), and a working gate valve (F ) and this gate valve (
A bowl-shaped sealing case (G) for working is detachably attached to the work case (G).

The connection case (E) is composed of a half-cylindrical part (e) that is split in half in the circumferential direction and is fitted onto the existing water pipe (8),
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 a connecting pipe (4) for connecting the new water pipe (C) is connected to this communication connection port (3). They are integrally connected in the radial direction perpendicular to the axis (x1) of the pipe portion (B).

One end opening (b, ) side of the pipe part (B) is integrally connected to one of the half-tube parts (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 axis (X2) of the existing water pipe (A) are almost orthogonal, and furthermore, the pipe part ( By fixing B) with its axis (XI) inclined about 45'' with respect to the vertical, its communication connection port (3) is held in an inclined position facing downward and bent in a dogleg shape. The free end side of the connecting pipe (4) 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 three types: one for perforation, one for installing a valve body, 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, and an operating shaft (7a) with the cutter (7) installed inside. A drive device (8) for rotating and sliding the operating shaft (7a) is mounted on the ceiling.

As shown in Fig. 2, the valve body installation case (G2) has an operating shaft (9a) equipped with a valve body (9) removably at its lower end on the ceiling, and the valve body (9) is installed inside the case (G2). It is held in such a way that it can be slid up and down.

The valve body (9) is connected to an approximately half-circumferential portion of the inner peripheral surface of the through-hole (a) formed in the peripheral wall of the existing water pipe (A) and an existing water pipe (A) that is connected to the circumferential end of this half-circumferential portion. ) A pressure-bonding seal surface (9b) that is crimped across the inner circumferential surface, and is installed into the existing water pipe (A) from the through hole (a), so that the existing water pipe faces the through hole (a). One of the flow paths of the pipe (A) is configured to be closed.

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 the pit (P) that surrounds the existing water pipe (A) that is buried underground, and remove the connection case (E) from the existing water pipe (A). Fit the tube part (B
) with the connecting pipe (4) facing downward.
) is fixed in an inclined position with its axis (xl) inclined at approximately 45 degrees with respect to the vertical, and the connecting pipe (B) is connected to the connecting pipe (B) via a flange joint (10) as a connection part provided at its free end. Connect the new water pipe (C) and connect the flange (5) to the gate valve (
Leave F) connected.

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

Port 9 Next, as shown in FIG. 1, attach the perforation case (G1) to the gate valve (F).

Then, connect the canter (7) to the gate valve (F) and the cylindrical part (B).
Lower the existing water pipe through it to the cutting work position (^)
After drilling the through hole (a) in the drilling case (Gl)
Close the gate valve (F) and open the drilling case (G1).
) from the gate valve (F).

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

C1 Next, as shown in Figure 2, install the valve body installation case (G
Connect 2) to the gate valve (F).

D9 Next, open the gate valve (F) as shown in Figure 3.
Insert the valve body (9) into the existing water pipe (A) through the through hole (a) through the gate valve (F), and temporarily close one of the channels of the existing water pipe (A) facing the through hole (a). occlusion. and,
The existing water pipe (A) part of the temporarily blocked flow path is cut to form an opening (11) facing in the longitudinal direction of the pipe, and the first lid (12) for blocking the pipe end is attached with a sealing ring. (13a) is connected to the connecting case (13).
E) to close the opening (11).

The first lid (12) includes a lid body (12a) that is attached and fixed to the opening (11), and a lid body (12a) that is inserted into the pipe of the existing water pipe (A) to connect the existing water pipe (A) and the pipe section (B). It is configured by providing a cylindrical rectifying member (12b) equipped with a rectifying surface (12c) that rectifies the flow direction of tap water, and the rectifying member (12b) increases its own volume when it comes into contact with water. Hold the water-expandable rubber that expands a certain amount (trade name: Brosper Seal, manufactured by Kowa Rubber Industries Co., Ltd.) (12d) and attach the lid body (12a).
It is configured to be movable along the longitudinal direction of the pipe by expansion of water-expandable rubber (12d).

E9 Next, remove the valve body (9) from the existing water pipe (A) in the same manner as the cutter (7) at the mouth, and replace it with the valve body (9) as shown in Figure 4. Attach the lid installation case (G3) to which the second lid (14) for closing the pipe end is attached to the gate valve (F).

The second lid (14) is inserted into the pipe part (B) and connected to the pipe part (B) and the newly installed water pipe (C) by the lid main body (14a) which is attached and fixed to the connection flange (5). The lid main body (1
4a) is attached and fixed to the connection flange (5), so that the rectifying surface (14c) is dimensioned to face the communication connection port (3).

8 Next, as shown in FIG.
Insert the second lid (14) into the pipe part (B) in the same manner as in step 9), and attach the lid body (14a) to the connecting flange (5) using the bolts (15) that have been screwed into the connecting flange (5) in advance. 5) Temporarily fix.

11 Next, release the lid installation case (G3) from the gate valve (F) and move the lid installation case (G3) to the operating shaft (9a).
) along the operating axis (9a) and the second i
(14), remove the lid installation case (G3), and remove the gate valve (F) from the connecting flange (5), as shown in FIG. Secure <14> to the connection flange (5).

The water flow path of the tap water is changed by the steps A to D above, but the flow regulating member (12b) of the first lid (12) gradually expands due to the water-swellable rubber (12d) coming into contact with water. move,
As shown in FIG. 4, the valve body (9) enters the removed portion and is held at the optimum position where the rectifying surface (12c) faces the through hole (a).

[Second Embodiment] Instead of the first M in the first embodiment, as shown in FIG. It may also be implemented using the 11i (12>) which is connected to (12a).

In the case of this embodiment, after the valve body (9) is removed, the screw member (12) is removed.
e) to move the rectifying member (12b) and remove the valve body (
9) and held at the optimum position where the rectifying surface (12c) faces the through hole (a).

Note that (12f) is an O-ring for sealing.

The other configurations are the same as in the first embodiment.

[Other Examples]

■ As shown in FIG. 8, the lid for closing the pipe end according to the present invention has a branch part formed by connecting the second fluid transport pipe (K2) in the middle of the first fluid transport pipe (K). , when the opening (11) is formed in the second fluid transport pipe (K2), it may be a lid (16) that closes the opening (11).

In addition, (16a) is the lid main body, and (16b) is the lid main body (16a).
) is a rectifying member fixed to the rectifying surface (16c).
is formed in an arcuate surface along the inner circumferential surface of the first fluid transport pipe (K1).

(2) The lid for closing the tube end according to the present invention is not limited to one that is installed and fixed in an uninterrupted state that maintains fluid circulation.

(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) In the fluid transport route changing method according to the present invention, the direction in which the valve body is inserted into and removed from the casing may be different from the direction in which the valve body is inserted into and removed from the casing into the existing fluid transport pipe.

(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 a lid for closing a pipe end according to the present invention and a method for changing a fluid transport route using the lid, and FIG. 1 is a cross-sectional view of the main part, and FIGS. Y-Y in
FIGS. 5 and 6 are cross-sectional views of the main parts as viewed from the arrow direction. FIG. 7 and FIG. 8 are main part sectional views showing different embodiments. FIG. 9 and FIG. 10 are sectional views showing conventional examples, respectively. (9)...Valve body, (11), (b2)...
...Opening, (12) ...Lid, (12a)
, (14a), (16a)...Lid body, (12b), (14b), (L6b)...
--- Rectifying member, (a) -- Through hole, (A), (K,
)...Fluid transport pipe, (B)...Casing (fluid transport pipe), (C)...Newly installed fluid transport pipe.

Claims (1)

[Claims] 1. Openings (11), (b
A lid for closing the tube end that is attached to the opening (11), (b_2) and is attached to the opening (11), (b_2), and the lid body (12a
), (14a), and (16a), the fluid transport pipe (A)
, (B), (K_2) and rectify the flow direction of the fluid at the branch part (12b), (14b).
), (16b) are arranged in series, a lid for closing a tube end. 2. The lid for closing a tube end according to claim 1, wherein the flow regulating member (12b) is movably connected to the lid main body (12a) along the longitudinal direction of the tube. 3. Fix the casing (B) to which the new fluid transport pipe (C) is connected in a fluid-tight or air-tight manner to the peripheral wall of the existing fluid transport pipe (A), and A through hole (a) is formed in the pipe peripheral wall in an uninterrupted state while maintaining fluid circulation, and one of the flow paths facing the through hole (a) of the existing fluid transport pipe (A) is connected to the through hole. (a)
A valve body (9) inserted into the existing fluid transport pipe (A) from
At the same time, the part of the existing fluid transport pipe (A) on the side of the blocked flow path is cut to form an opening (11) facing in the longitudinal direction of the pipe, and the opening (11) is closed with a lid ( 1
2), the valve body (9) is inserted into the through hole (a).
to the casing (B) side, and the fluid transport path is connected to the existing fluid transport pipe (
A) and the new fluid transport pipe (C).
after closing with the tube end closing lid (12) according to claim 2, the valve body closes one of the flow paths facing the through hole (a) of the existing fluid transport pipe (A). (9) A method for changing a fluid transport route, characterized in that the fluid transport route is removed from the through hole (a) to the casing (B) side.