JPH1182812A - Multiple thread pipe joint utilizing bag body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collectively connect multiple thread pipes together by bindingly connecting pipe bodies together by means of injecting a liquid filling material into a bag body through a filling hole after inserting the end of the pipe bodies into the through holes and solidifying the filling material. SOLUTION: An externally square bag body 1 lateral face facing the pipe laying direction is formed with numerous round through holes 2 and the lower part of the other lateral face is provided with a filling hole 11 for injecting a filling material 3 into the bag body 1 and has a pressure hose 1c connected to the through hole 11, while its upper surface is provided with an air vent and an exhaust port 12 with a tube 1d connected thereto for checking the filling state of the filling material 3. The through hole 2 has pipe body 4 ends inserted therein from both sides and the outer circumferences of the pipes are bindingly connected to the bag body 1 by the filling material 3. The inside diameter of the through hole 2 is made slightly larger than the outside diameter of the pipe body 4 when the bag body 1 is not filled with the filling material 3 so that insertion of the filling material 3 can be accomplished easily. The through hole 2 diameter contracts by the effect of inflation of the bag body 1 when the filling material 3 is injected therein causing the bag body 1 to tightly connect with the pipe body 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction of a multi-strand pipe for laying a large number of protection pipes for electric wires and other pipes in parallel, and to easily and efficiently connect a plurality of pipes laid in parallel with each other. The present invention relates to a multi-section pipe joint that has made it possible.

[0002]

2. Description of the Related Art Conventionally, when connecting pipes in a multi-strand pipe laying work in which a large number of wire protection pipes are laid in parallel, a socket joint 21 or a pipe 22 with a socket as shown in FIGS. It is used and inserted by inputting one by one. At that time, the connection surface was filled with an adhesive or a rubber ring 23 was used to ensure water stopping. The one using the latter rubber ring 23 may be used as an expansion joint that is slidable by increasing the socket length. Conventionally, the attachment portion between the pipe 4 and the manhole main body 26 is arranged by aligning the end of the pipe 4 with the end of the manhole attachment pipe 24 (wrapper pipe), and then assembling a formwork on the outside. Place mortar, etc., and manhole body 2
8, or as shown in FIG. 8, a concrete panel 25 incorporating a manhole mounting pipe 24 is prepared, and a concrete panel 25 is
Are connected by bolts or the like.

[0003]

In the above-mentioned conventional pipe joint, when connecting multiple pipes, it is necessary to perform pipe connection work for each pipe, and since this work is performed in a narrow space, the work efficiency is low. There was a problem that was bad. In addition, since a relatively large pushing force is required to insert the end of the tube into the socket during the connection operation, there has been a problem that this reaction force must be ensured. Furthermore, in the manhole attachment section, it is necessary to manufacture a complicated formwork and perform concrete placing work, which has a problem that the work is complicated. SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art and to provide a multi-row pipe joint capable of easily and collectively connecting multi-row pipes.

[0004]

As a means for achieving the above object, the present invention has the following constitution. In the present invention, a plurality of through-holes 2 are integrally provided in a bag 1 having an injection hole 11 and a discharge hole 12, and after the end of the tube 4 is inserted into the through-hole 2, the injection hole is formed. This is a multi-tube joint using a bag, characterized in that a filling material 3 in a flowing state is poured into the bag 1 from 11 and the filling 3 is solidified and the tube 4 is restrained and connected. In order to secure the joint strength, it is desirable that the length of the through-hole 2 be twice or more the outer diameter of the tube 4. When a bag made of woven fabric is used for the bag 1a in the through hole, shrinkage deformation of the bag in the through hole 2 can be reliably obtained, and the waterproofness and joint strength of the joint can be increased. A rubber sleeve 6 having an inner diameter substantially equal to the outer diameter of the tube 4 is provided around the outer periphery of the tube 4 inserted into the through hole 2.
When the watertight ring 5 is mounted on the outer periphery of the pipe 4 part inserted into the through hole 2, a watertight expansion joint can be obtained. As the filler 3 to be filled in the bag 1, it is desirable to use an expandable cement-based material such as expanded mortar or expanded mortar. When the multi-section pipe joint of the present invention is applied to a manhole, one of the through-hole surfaces of the bag body 1 can be attached to the side wall of the manhole, and the trumpet tube 10 is inserted into the through-hole 2 on the manhole side. To

[0005]

The multi-pipe joint according to the present invention has an injection hole 11 and a discharge hole 12 manufactured in advance, and has a plurality of through holes 2 on the side surface.
After the bag 1 is brought to the pipe laying site and the end of the tube 4 connected to the through hole 2 of the bag 1 is inserted, the bag 1 is inserted through the injection hole. The filling material 3 (expandable substance) in a fluidized state is injected into the bag body 1 and a large number of pipes 4 are simultaneously connected collectively only by solidifying the filling material 3. That is, the bag 3a filled in the bag 1 expands the bag 1a in each through-hole, the diameter of the through-hole 2 is reduced, and the end of the tube 4 inserted into each of the through-holes 2 The filler 3 is solidified and constrained in a state where the bag body 1 of the through-hole 2 part is in close contact with the outer periphery, and the connection of the pipe body 4 in which the water stoppage and the joint strength are secured is obtained.

If the bag 1a of the through hole is made of a woven fabric and is easily contracted and deformed, the bag 1a can be in good contact with the outer periphery of the tube 4 without wrinkles. . Further, a rubber sleeve 6 having an inner diameter substantially equal to the outer diameter of the tube 4 is attached to the outer periphery of the tube 4 inserted into the through hole 2, or a water blocking ring is attached to the outer periphery of the tube 4 inserted into the through hole 2. When the tube 5 is attached, the elastic function of these members allows the tubular member 4 to exhibit the expansion and contraction function while maintaining the water blocking property. Therefore, expansion and contraction when the temperature of the tube 4 changes, uneven settlement of the ground, The tube 4 can follow the deformation, and can be an expansion joint and a seismic joint. Since the bag 1 has flexibility, the pipe 4 can be inserted into the through-hole 2 into the container without requiring high centering positioning accuracy when connecting the pipe 4. Further, even if an inflatable substance is used for the filler 3 of the bag body 1, no excessive tightening stress is generated in the tube body 4.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multi-tube joint using a bag according to the present invention will be described below. As shown in FIG. 1, the multiple-pipe joint according to the present invention has a large number (9 in the embodiment) on the side face in the pipe laying direction of the bag 1 having a rectangular external shape.
) Are formed, and an injection hole 11 for injecting the filler into the bag 1 and a pressure-resistant hose 1c connected thereto are connected to the lower part of the other side surface, and the upper surface is formed on the upper surface. A discharge hole 12 to which the tube 1d is connected is provided for checking the air release and the filling state of the filler. The ends of the tube 4 are inserted into the through holes 2 from the left and right, and the outer periphery of the tube is connected with the filler 3 filled in the bag 1 while being restrained. The outer shape of the bag 1 may be cylindrical. The bag 1 of the present invention is made of a synthetic resin or cloth impregnated with a resin or the like, or a sheet made of rubber or the like having an appropriate thickness and laminated and bonded or formed by sewing. Here, the appropriate thickness means a thickness which has a pressure resistance against the filler 3 to be filled therein, and has a degree of flexibility such that the bag 1 does not expand excessively and can be folded in a state where the inside air is evacuated. It is about 1 mm. Further, it is preferable that the cloth of the bag body 1 be made of water-impermeable material.
It may have a water permeability such that the moisture of the water oozes out.
In the case of using a cement-based filler, an increase in strength due to a water-reducing action can be expected if there is a slight water permeability.

The through hole 2 of the bag 1 plays an important role in connecting the tube 4. The through hole 2 has an inner diameter slightly larger than the outer diameter of the tube 4 when the filler 3 is not injected into the through hole 2 so that the pipe 4 can be easily inserted.
In the state where the filler 3 is injected, the bag 1 expands and the through-hole 2
It is necessary to reduce the diameter so that it comes into close contact with the outer periphery of the tube 4. If the length of the through hole 2, that is, the connection length at the end of the tube 4 is too short, the connection strength and the water-stopping performance of the tube 4 cannot be sufficiently exhibited, so it is better to make the length as long as possible. The amount of material to be filled into the inside becomes large. Therefore, it is preferable that the length of the through hole 2 is about twice as long as the connection length is the same length as the diameter of the tube 4. Also, if the gap between the bag body 1a of the through hole and the outer periphery of the tube 4 is large, the diameter of the through hole 2 is reduced and wrinkles are likely to occur when the bag 1a comes into close contact with the outer periphery of the tube 4. For this reason, it is desirable to use a woven cloth or the like that has a shrinkage property in the circumferential direction as the material of the bag body 1a in the through hole.

As shown in FIG. 2, when a rubber sleeve 6 or a rubber waterproof ring 5 having an inner diameter substantially equal to the outer diameter of the tube 4 is attached to the outer periphery of the tube 4 inserted into the through hole 2, the tube is inserted. It can enhance the water stopping property of the body connection part and have a function of expansion and contraction, and can be used as an expansion joint and an earthquake-resistant joint. When both the rubber sleeve 6 and the rubber waterproof ring 5 are mounted, the effect is further enhanced. In addition,
In the case of an expansion joint, the length of the through hole 2 needs to ensure the designed expansion and contraction amount. As the filling material 3 to be filled in the bag body 1, a material which solidifies with the passage of time in a flowing state at the time of injection is used. From the viewpoint of increasing the joint strength and the water stopping performance, it is desirable to have a swelling property. From the viewpoint of cost and ease of handling, it is preferable to use expanded cement milk, expanded mortar, and expanded mortar (air mortar) using an expandable cement material as materials suitable for this condition.
Other than the cement type, use of a synthetic resin type material such as urethane foam or a lime type may be considered.

[0010]

【Example】

(Embodiment 1) Next, an embodiment of a multi-row pipe joint using a bag according to the present invention will be described including a construction method. FIG.
In the embodiment shown in FIG. 7, nine parallel multi-walled tubes are connected in series and butt-connected. The multi-row joint shown in this example is shown by the following procedure. First, a large number (9 in the embodiment) of circular through-holes 2 are formed on the side surface of the bag body 1 having a quadrangular shape in the laying direction of the pipe, and the filler 3 is injected into the bag body 1 at the lower part of the other side surface. And a pressure-resistant hose 1c connected thereto, and an upper surface provided with a discharge hole 12 connected to a tube 1d for checking the air release and the filling state of the filler. The airbag 1 is transported to the pipe laying site in a folded state, and air is sent from the inlet 11 or the outlet 12 to lightly inflate the bag 1 with air. Next, the pipes 4 are passed through the through-holes 2 of the bag body, and the water stop ring 5 and an inner diameter substantially equal to the outer diameter of the pipes are formed at the ends of each of the pipes 4 at the same length as the outer diameter of the pipes. After the rubber sleeves 6 are attached and butted, the bag 1 is pulled back so that the end of each tube 4 is substantially at the center of the through hole 2 of the bag 1. At this time, it is preferable to chamfer the inner surface of the end of the rubber sleeve 6 so that the tube 4 can be easily inserted into the rubber sleeve 6. In the case where the telescopic function is not required, the water stop ring 5 and the rubber sleeve 6 may not be provided, and the end of each tube 4 may be merely inserted almost to the center of the through hole 2 of the bag 1. Next, while discharging the air in the bag 1 from the discharge hole 12,
The filling material 3 such as cement milk in a flowing state is injected from a pressure-resistant hose 1c connected to the hose. Exhaust hole 12 on top of bag 1
When the filling material reaches the tube 1d connected to the tube, the filling operation is completed, and the pressure-resistant hose 1c is opened by a valve (not shown).
And the air release tube 1d is closed and sealed. When the curing time of the filler 3 inside the bag 1 has passed and the resin has hardened, each tube 4
Are in a state of being restrictedly connected by the two through holes.

(Embodiment 2) Next, a description will be given of an embodiment in which a multi-row pipe joint using a bag according to the present invention is applied to a manhole portion. FIG. 5 is a perspective sectional view of a multi-tube fitting using a bag attached to one side wall of a manhole. The difference from the first embodiment is that a flange 8 made of a steel plate having a bolt hole or a concrete plate is joined so that one of the through-hole surfaces of the bag body 1 can be attached to the side wall of the manhole. Side through hole 2
Is that the trumpet tube 10 is inserted therein. The trumpet tube 10 has a curved opening at the entrance so as not to damage the electric wire inserted into the tube 4. Except for the above, the configuration is almost the same as that of the first embodiment, and the description is omitted. In the case where the multi-section pipe joint of the present invention is applied to a place where uneven settlement occurs in the pipe body and the manhole as in the second embodiment,
It is necessary to use the water-stop ring 5 and the rubber sleeve 6 because it is necessary to maintain the water-stopping property and to have the expansion / contraction function.

[0012]

According to the multi-joint pipe joint of the present invention, a light and flexible bag is brought to the pipe laying site, and the end of the tube is easily inserted into the through hole of the lightly expanded bag. Injecting a flowable filler (expandable substance) into the bag from the injection hole, and solidifying the filler allows simultaneous connection of a large number of pipes at the same time, making the operation extremely simple and efficient. Good. If the bag material of the through-hole portion is made of a woven fabric that is easily contracted and deformed, it can be in good contact with the outer periphery of the tube without wrinkling. Further, when a rubber sleeve having an inner diameter substantially equal to the outer diameter of the tubular body is attached to the outer periphery of the tubular portion inserted into the through hole, or a waterproof ring is attached to the outer periphery of the tubular portion inserted into the through hole, these The elastic deformation of the members allows the tube to expand and contract while maintaining the water-stopping property, so that the tube can follow the expansion and contraction when the temperature of the tube changes, the uneven settlement of the ground, and the deformation of the ground during an earthquake. Expansion joints and earthquake-resistant joints.
Since the bag body has flexibility, it does not require high centering positioning accuracy when connecting pipes, and can easily insert the pipe body into the through-hole, and does not require a reaction force body as in the prior art. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention in which multiple tubes are connected in series using a bag joint.

FIG. 2 is a perspective sectional view of a bag body joint penetrating portion of FIG. 1;

FIG. 3 is a perspective cross-sectional view of a bag body joint penetrating portion in FIG. 1, which is an example in which a water blocking ring is omitted.

FIG. 4 is a perspective sectional view of a bag body joint penetrating portion in FIG. 1, which is an example in which a water blocking ring and a rubber sleeve are omitted.

FIG. 5 is a perspective sectional view of an example in which the bag joint of the present invention is applied to a manhole connecting portion in Example 2 of the present invention.

FIG. 6 is a perspective sectional view showing a conventional example.

FIG. 7 is a perspective sectional view showing a conventional example.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag body 1a Bag body of a through-hole part 1c Pressure-resistant hose 1d Air bleeding tube 2 Through-hole 3 Filler 4 Tube body 5 Water stop ring 6 Rubber sleeve 8 Flange 10 Wrapper tube 11 Injection hole 12 Discharge hole 21 Socket joint 22 Pipe with socket 23 Rubber ring 24 Manhole mounting pipe 25 Concrete panel 26 Manhole body

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 28, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention in which multiple tubes are connected in series using a bag joint.

FIG. 2 is a perspective sectional view of a bag body joint penetrating portion of FIG. 1;

FIG. 3 is a perspective cross-sectional view of a bag body joint penetrating portion in FIG. 1, which is an example in which a water blocking ring is omitted.

FIG. 4 is a perspective sectional view of a bag body joint penetrating portion in FIG. 1, which is an example in which a water blocking ring and a rubber sleeve are omitted.

FIG. 5 is a perspective sectional view of an example in which the bag joint of the present invention is applied to a manhole connecting portion in Example 2 of the present invention.

FIG. 6 is a perspective sectional view showing a conventional example in which a socket joint is used .

FIG. 7 is a perspective cross-sectional view showing a conventional example using a tube with a socket .

FIG. 8 shows a conventional example in which a concrete panel is mounted on a manhole body.
FIG. 4 is a perspective view showing a case where the screws are joined by bolts or the like .

[Description of Signs] 1 bag body 1a bag body with through hole 1c pressure-resistant hose 1d air vent tube 2 through hole 3 filler 4 tube 5 water stop ring 6 rubber sleeve 8 flange 10 trumpet tube 11 injection hole 12 discharge hole 21 socket Joint 22 Pipe with socket 23 Rubber ring 24 Manhole mounting pipe 25 Concrete panel 26 Manhole body

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takashi Mochizuki Nippon Steel Corporation 2-6-3 Otemachi, Chiyoda-ku, Tokyo

Claims (7)

[Claims] 1. A bag provided with an injection hole and a discharge hole is provided with a plurality of through-holes integrally, and after inserting an end of a tube into the through-hole, the bag is inserted into the bag from the injection hole. A multi-section pipe joint using a bag, characterized by injecting a filler in a flowing state, solidifying the filler, and restricting and connecting the pipe. 2. The multiple tube joint using a bag according to claim 1, wherein the length of the through hole is at least twice the outer diameter of the tube. 3. The bag body according to claim 1, wherein the bag body of the through-hole portion is made of woven cloth, and can be contracted and deformed by the pressure of a filler filling the bag body. Multi-joint fittings using 4. A multi-joint pipe joint using a bag according to claim 1, wherein a rubber sleeve is attached to an outer periphery of a pipe portion inserted into the through hole. 5. A bag body according to claim 1, wherein a water stop ring is attached to an outer periphery of a tubular body portion inserted into the through hole. Multi-section pipe fittings. 6. The method according to claim 1, wherein the filler to be filled in the bag body is an expandable cement-based material.
A multi-tube joint using the bag according to claim 2, 3, 4, or 5. 7. The bag according to claim 1, wherein one of the through-hole surfaces of the bag is attachable to a side wall of the manhole, and a trumpet tube is inserted into the through-hole on the manhole side.
A multi-tube joint using the bag according to claim 2, claim 3, claim 4, claim 5, or claim 6.