JPH01193494A - How to connect pipes - Google Patents

Abstract

PURPOSE:To prevent a filling material from outflow into a space defined by a wall by disposing a hollow annular member on the outer periphery of a pipe end to close a gap between said outer periphery and the wall with fluid poured into the annular member. CONSTITUTION:An annular member 66 is fitted onto the outer periphery of an end of a branch pipe 64 and provided with an expansible annular hollow portion 68. A gap between said outer periphery and a wall 14 is closed by pouring fluid through a pipe 74 into the hollow portion 68 of the annular member 66. Thus, since the gap between the branch pipe 64 and the wall 14 can be closed even if the space is large, filling material or adhesives can be prevented from outflow into the space defined by the wall 14.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for connecting a pipe to a wall defining a space so that a chain pipe communicates with the space, and an auxiliary tool for pipe connection.
In particular, the present invention relates to a method for connecting a branch pipe extending upward from above to a wooden pipe such as a sewage system, and a pipe connecting method suitable as an auxiliary tool, and an auxiliary tool for pipe connection.

(Prior Art) One of the methods of laying a sewage attachment pipe, that is, a branch pipe that communicates with an existing wooden pipe installed underground, is to insert the branch pipe using an excavation mechanism such as an earth auger. Drill a hole in the ground from the ground side toward the main pipe, and at the same time, drill a second hole in the main pipe to receive the tip of the branch pipe, and then insert the tip of the branch pipe into the second hole. Place the branch pipe first so that it can be inserted.
After inserting the main pipe into the first hole and the second hole, there is a method of filling the area around the branch pipe with a filler material such as sand, or prior to this, bonding the main pipe and the branch pipe with an adhesive.

(Problem to be Solved by the Invention) However, in the conventional construction method, if the gap formed between the outer circumferential surface of the tip of the branch pipe and the main pipe is small, the tip of the branch pipe is inserted into the second hole. There is a problem that the insertion work becomes troublesome.

On the other hand, if the gap is large, there is a problem that the filling material or the adhesive flows out from the gap into the main pipe.

The above problems are not limited to sewage facilities, but also waste piping facilities,
This is a great advantage when connecting a new branch pipe to an existing pipe such as in an electric wiring facility, or when connecting a pipe to a wall member that defines a space where workers cannot enter.

The present invention provides a pipe that can prevent filler material or adhesive from flowing into the space even if the gap between the wall defining the space and the pipe connected thereto is large. The purpose is to provide a connection method and an aid for pipe connection.

(Means for Solving the Problems) The pipe connection method of the present invention is a method of connecting a pipe to a wall defining a space such that a chain pipe communicates with the space, and the pipe is connected to the outer periphery of the distal end of the pipe. After arranging a hollow annular member and inserting the distal end of the tube together with the annular member into a hole bored in the wall that communicates the tube and the space, injecting fluid into the annular member. The gap between the outer periphery of the tip end of the tube and the wall is closed by this.

The method for connecting pipes of the present invention is suitably applied to a method for connecting a pipe to a wall provided underground to define a space so that a chain pipe communicates with the space. In this case, by inserting the tube from the tip side into the first hole bored from the ground toward the wall with a hollow annular member arranged around the tip of the tube, the tube can be inserted into the first hole from the tip side. The distal end of the tube is inserted together with the annular member into a second hole bored in the wall that communicates the space with the annular member, and then the fluid is injected into the annular member.

drilling the first hole from the ground toward the wall using a cylindrical casing and an auger disposed within the casing;
At this time, it is preferable that the second hole is bored in the wall using a cutter provided at the tip of the auger. in this case,
After forming the first and second holes, the tube is inserted into the casing from the distal end side and inserted into the second hole together with the annular member.

Preferably, a sealant is injected between the tip of the casing and the outer surface of the wall after or prior to removing the auger and cutter.

When the casing is to be buried, a fluid is injected into the annular member and then a filling material is filled between the casing and the pipe. However, if the casing is not buried, after injecting the fluid into the annular member,
A filler is filled between the pipe and the ground while or after the casing is removed.

Preferably, the fluid is curable. In particular, it is preferable to use an annular member in which an adhesive is used as the fluid and the hollow portion is defined by a knitted or woven fabric.

(Operations and Effects of the Invention) The gap between the outer periphery of the tip end of the tube and the wall is closed by injecting fluid into the annular member. Therefore, according to the present invention,
Even if the space is large, the outflow of filler material or adhesive from the space into the space defined by the wall is prevented.

According to the connection method of claim (2), the pipe is connected to a wall provided underground by making the inner diameter of the hole into which the pipe is received sufficiently larger than the inner diameter of the pipe. Regardless of the method, the tube can be easily inserted into the hole.

According to the connection method of claim (3), since the casing is present when the tube is inserted into the first hole and when the fluid is injected into the annular member, The casing prevents the ground from collapsing when the tube is inserted and when the fluid is injected into the annular member.

According to the connection method of claim (4), since the space between the tip of the casing and the outer surface of the wall is closed with a sealant, when the pipe is inserted into the first hole, earth and sand can be removed from the casing. It is prevented from flowing into the casing through the gap between the wall and the wall.

According to the connection method of claim (5), the casing can be completely buried. On the other hand, according to the connection method of claim (6), the casing can be used repeatedly.

According to the connection method of claim (7), the gap is maintained in a closed state by hardening the fluid.

According to the connection method of claim (8), since a portion of the adhesive leaks from the annular member, the gap is not only maintained in a closed state by the adhesive being cured. , the wall and the tube are bonded together.

(Example) Embodiments of the present invention shown in the drawings will be described below.

As shown in Figure 1, there is an excavator 1 on the ground that excavates a hole.
0 is set. Excavator 10 includes a support platform 12 installed on the ground. The support stand 12 includes a guide 16 extending parallel to an axis extending from the ground toward a main pipe 14 provided underground as shown in FIG. Guide 16 includes
A slider 18 is movably arranged. The slider 18 has a cylinder mechanism 20 attached to the support base 12.
is moved along the guide 16.

An excavation mechanism 22 for boring a hole from the ground toward the main pipe 14 is removably attached to the slider 20 using metal fittings 24 and 26.

In the illustrated example, the excavation mechanism 22 includes a cylindrical casing 28.
It may be an earth auger comprising an auger 30 housed in the casing, and a cutter 32 attached to the tip of the auger, or any other excavation mechanism. The casing 28 and the auger 30 are coupled so that they rotate together and can be separated.

As clearly shown in FIG. 3, the shaft 34 of the auger 30 comprises a cylindrical member with a hollow portion 36 extending along its axis. The hollow portion 36 communicates with the outside through a plurality of holes 38 extending in the radial direction of the shaft 34 at its lower end.

The shaft 34 is rotatably supported by the metal fitting 26. The shaft 34 also has a motor 4 supported on the support base 12.
0 rotation is transmitted through the chain 42. As a result, the casing 28, auger 30 and cutter 32
rotated as a unit.

As shown in FIG. 3, the cutter 32 includes a cylinder 44 removably attached to the lower end of the shaft 34, and a plurality of bits 46 exchangeably attached to the lower end. The shaft 34 is fitted with a cap 48 which closes the hollow portion 36 thereof at the upper end of the shaft 34.

At the time of connection, first, the cylinder mechanism 20 is extended while the motor 40 is operated. As a result, the excavation mechanism 22 is rotated and advanced around the axis extending from the ground toward the main pipe 14, so that the excavation mechanism 84 excavates the ground 52, as shown in FIGS. 1 and 2 (A). is excavated and eventually reaches the tip of the excavation mechanism 22 or the main pipe 14, resulting in the ground 52
A hole is drilled in the main pipe 14, and a portion of the main pipe 14 is cut out using a cutter 32.

Next, as shown in FIG. 2(B), a hose 54 is connected to the nipple 50, and a fluid and hardening sealant is injected into the hollow portion 36 from the hose. As shown in FIG. 3, the sealing agent flows out from the hollow portion 36 through the hole 38 and flows into the casing 28 and the main pipe 1 as shown at 56.
Close the gap between 4 and 4.

Hardenable sealants include cement-based sealants whose main ingredients are portrant cement and additives, sodium silicate, water glass-based sealants whose main ingredients are portrant cement and additives, sodium silicate, and sodium bicarbonate. Alternatively, a material containing an aluminate sorter and additives as main components can be used.

Next, before the sealant 56 dries and hardens, the auger 30
Then, the cutter 32 is removed together with the cut piece 58 of the woodwind 14. The auger 3o and the cutter 32 are mounted on the motor 4 with the casing 28 released from the mounting bracket 24.
0 or simply by retracting the cylinder mechanism 20.

By kneading, the casing 2 is formed as shown in Fig. 2 (C).
hole 60 defined by 8 and the inside of main pipe 14 or woodwind 14
They are completely communicated by a hole 62 drilled in the.

Next, as shown in FIG. 2(C), the hole 62 of the main pipe 14 is opened.
until a branch pipe 64 having an outer diameter smaller than the inner diameter is inserted into the hole 62 of the main pipe 14 with its distal end.
It is inserted into the casing 28. Branch tube 64 can be inserted either manually or mechanically.

As shown in FIGS. 4 and 5, an annular member 66 is fitted around the outer periphery of the distal end of the branch pipe 64. As shown in FIGS. Annular member 66
has an inflatable annular hollow part 68 like a rubber tube for a wheel, and also has a six 62 of the main pipe 14 on the outer periphery of the upper end.
The flange portion 70 has an outer diameter larger than an inner diameter. The annular member 66 is fitted into the branch pipe 64 with the hollow portion 68 contracted.

The annular member 66 may be made of a material with good watertightness and elasticity, such as rubber. However, like the annular member shown in FIG. 7, the annular member 66 is made of a material such as a woven or knitted material, or the portion defining the hollow portion 68 is made of a material such as a woven or knitted material. It is preferable that the flange portion 70 is an annular member 66 made of rubber.

The hollow part 68 of the annular member 66 is connected to the pipe 7 through the check valve 72.
It is connected to 4. Although the tube 74 is sufficiently thinner than the branch tube 64, it has approximately the same length dimension as the branch tube 64. tube 7
4 is inserted into the casing 28 together with the branch pipe 64. The check valve 72 prevents the pipe 7 from being removed when the pipe is finally removed.
4 is removably connected.

When the annular member 66 and the distal end of the branch pipe 64 are inserted into the hole 62 of the main pipe 14 until the flange portion 70 of the annular member 66 contacts the outer circumferential surface of the main pipe 14, fluid flows into the annular member 6.
6 through the tube 74. As a result, the annular member 66 is expanded to close the gap between the wood pipe 14 and the branch pipe 64, as shown in FIG.

As the fluid, if the annular member is made of a material with good airtightness such as rubber, compressed air or liquid may be used, but if a curable slurry is used, the annular member 6
By hardening the slurry while the pipe 6 is expanded, the gap between the main pipe 14 and the branch pipe 64 is maintained in a closed state. Furthermore, in the case where the portion defining the hollow portion 68 is an annular member 66 made of a material such as a woven or knitted material,
The gap between the main pipe 14 and the branch pipe 64 is closed by using a hardening fluid such as an adhesive, so that a part of the fluid leaks out to the outside of the annular member 66 and hardens. Not only is the state maintained, but the main pipe 14 and branch pipe 64 are bonded together by the fluid.

The hardening slurry includes a cement-based slurry mainly composed of Portland cement and additives, a water glass-based slurry mainly composed of sodium silicate, Portland cement and additives, sodium silicate, and sodium bicarbonate. Or there are those whose main ingredients are sodium aluminate and additives.

Next, as shown in FIG. 2(D), after the pipe 76 is inserted between the casing 28 and the branch pipe 64, the casing 2
8. While pipe 72 and pipe 76 are being pulled upwardly or after they are removed, a hardenable or non-hardenable filler 78 is injected from pipe 76 between ground 52 and branch pipe 64. As a result, the space between the ground 52 and the branch pipe 64 is filled, and the branch pipe 64 is fixed to the main pipe 14 and the ground 52. Instead of using the pipe 76, the filler material 78 may be injected from the pipe 74 between the ground 52 and the branch pipe 64 while the pipe 74 is removed.

As hardening fillers, cement-based fillers containing Portland cement and additives as main components, sodium silicate,
A water glass-based material whose main components are Portland cement and additives, or a water glass-based material whose main components are silicate sorter, bicarbonate of soda, or aluminate sorter and additives can be used. - Sand or gravel can also be used as a non-hardening filler.

The casing 28 can be filled. In this case, the filler material 78 may be injected between the ground 52 and the branch pipe 64 from the pipe 76 while removing the pipe 72 and the pipe 76 . Tubes 74 and 76 may also be buried. When the pipe 74 is buried, the check valve 72 and the pipe 74 may be connected inseparably.

[Brief explanation of the drawing]

Figure 7JJ1 is a diagram showing an embodiment of the excavator used in the present invention, Figure 2 is a diagram showing a process for explaining the connection method of the present invention, and Figure 3 is an excavation mechanism in the final process of excavation. FIG. 4 is a diagram showing the state in which the tip of the branch pipe is inserted into the hole in the main pipe, FIG. 5 is a diagram showing the state in which the annular member is expanded, and FIG. It is a figure which shows the Example of an annular member. 10: Excavator, 14: Main pipe, 22: Excavation mechanism, 28: Casing, 30: Auger, 32 Cutter, 52, Ground, 56: Sealing agent, 60.62: Hole, 64: Branch pipe, 66: Annular Member, 68: Hollow part, 78: Filler. Agent Patent Attorney Nobuyuki Matsunaga Figure 4 Figure 5

Claims (9)

[Claims] (1) A method of connecting a tube to a wall that defines a space so that the tube passes through the space, in which a hollow annular member is arranged around the outer periphery of the tip of the tube, and the tube and the space are communicated. After inserting the distal end of the tube together with the annular member into a hole drilled in the wall in order to close the gap between the outer periphery of the distal end of the tube and the wall by injecting fluid into the annular member. , how to connect tubes. (2) A method of connecting a pipe to a wall provided underground to define a space so that the pipe communicates with the space, the method comprising arranging a hollow annular member around the outer periphery of the tip of the pipe. , a first hole drilled in the wall to connect the first hole and the space by inserting the tube from the tip side into the first hole drilled from the ground toward the wall; 2. A method for connecting tubes, wherein the distal end of the tube is inserted into the hole No. 2 together with the annular member, and then a fluid is injected into the annular member to close the gap between the outer periphery of the distal end of the tube and the wall. (3) A method of connecting a pipe to a wall provided underground to define a space so that the pipe communicates with the space, the method comprising a cylindrical casing and an auger disposed within the casing. drilling a first hole in the ground extending from the ground toward the wall, and drilling a second hole in the wall that communicates the first hole with the space using a cutter provided at the tip of the auger; removing the auger and the cutter;
After or prior to this, a hollow annular member is placed around the outer periphery of the distal end of the tube, and the tube is inserted into the casing from the distal end side of the tube, so that the distal end of the tube is inserted into the casing together with the annular member. A method for connecting a tube, the method comprising: inserting into a second hole and injecting a fluid into the annular member to close a gap between the outer periphery of the distal end of the tube and the wall. (4) The method according to claim 3, further comprising injecting a sealant between the tip of the casing and the outer surface of the wall after or before removing the auger and the cutter. How to connect pipes. (5) The method for connecting pipes according to claim 3 or 4, further comprising filling a space between the casing and the pipe with a filler after injecting the fluid into the annular member. (6) After injecting the fluid into the annular member, the method further comprises filling a space between the pipe and the ground with a filler material while or after removing the casing.
) to (5). (7) Claims (1) to 1, wherein the fluid is a curable fluid.
(6) The method for connecting a pipe according to any one of the above. (8) Any one of claims (1) to (7), wherein an adhesive is used as the fluid, and a member in which at least the hollow portion is defined by a knitted fabric or a woven fabric is used as the annular member.
How to connect pipes as described in section. (9) An auxiliary tool for connecting a pipe to a wall defining a space so that the pipe communicates with the space, the auxiliary tool for connecting a pipe including an annular member having an annular hollow part.