JPH0384297A - Method for connecting branch connection pipe coupling to pipe with rib - Google Patents

Abstract

PURPOSE:To ensure coupling strength and sealing ability between a piping coupling and a pipe with a rib even in a state to be roughly filled with an adhesive by a method wherein protrusion parts formed on the joining part of a saddle part are pressed in an adhesive on the outer peripheral surface of the pipe with a rub, and a gap between the pipe coupling and the pipe with a rib is filled in a dense state with the adhesive. CONSTITUTION:A connection part 23 of a pipe coupling 2 is mounted to a pipe 1 with a rib in a way that packings 231... are brought into adhesion to the peripheral edge part of a branch hole 12. The joining surface of a saddle part 21 is brought into pressure contact with the surface of an adhesive 3, and is securely fastened from the outside of the saddle part 21 by means of a wire and a lock band. In which case, protrusion bodies 26 formed on the joining surface of the saddle part 21 are pressed in the adhesive 3, and a gap between the saddle part 21 and the pipe 1 with a rib is compression-filled in a dense state with the adhesive 3. Air bubbles are prevented from being drawn in an interface between the joining surface of the saddle part 21 and the surface of the adhesive 3, and so called deaeration, e.g. removal of air bubbles in the adhesive 3, is effected to join between the saddle part 21 and the pipe 1 with a rib.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a branch pipe connecting pipe having a socket for receiving an end of a branch pipe, and a saddle part curved approximately along the outer circumference of a rib of a ribbed pipe. The present invention relates to a connection method for connecting a branch connection pipe joint consisting of the above to the peripheral wall of a ribbed pipe having a large number of annular ribs on its outer peripheral surface.

(Prior Art) Conventionally, a connection structure of this type of branch connection pipe joint is known, for example, as disclosed in Japanese Patent Laid-Open No. 151411/1983.

In this connection structure, as shown in FIG.
At the same time, the saddle part d protruding from the outer periphery of the proximal end is placed on the outer surface of the ribbed tube a, and the protrusion e protruding between the ribs of the saddle part d is inserted into the ribbed tube a. Fitted between each 911 and joined, thereby preventing a gap from forming between the joint surface of the saddle part d and the outer peripheral surface of the ribbed tube a,
The branch connecting pipe joint is designed to be firmly connected to the ribbed pipe a.

(Problems to be Solved by the Invention) However, the above conventional connection structure has the following disadvantages.

That is, it is generally difficult to drill a branch hole in the ribbed pipe a with high precision at the construction site, and the precision of forming the protrusion e of the saddle part d and the ribbed pipe a is not so high.
When the proximal end of the branch pipe connection part C matches the branch hole, the protrusion e and each of the ribs 1 do not necessarily match perfectly, and the spacing between the protrusion e and each rib 1 tends to become uneven. Ta. For this reason, in this type of connection structure, high-viscosity bonding agents with excellent filling effects are often used. It is difficult to apply a thick coating due to the high viscosity of the bonding agent, and therefore there are disadvantages in that the application of the bonding agent is cumbersome and the connection work is troublesome. Further, the saddle part d is pressed against the ribbed tube a to spread out the bonding agent,
Even if an attempt is made to make the coating thickness uniform, it is difficult due to the high viscosity of the bonding agent, and therefore high bonding strength cannot be obtained between the bonding surface of the saddle portion d and the ribbed tube a, and as a result,
There were disadvantages such as poor sealing performance.

The present invention has been made in view of the above circumstances, and provides a method for connecting a branch connection pipe joint to a ribbed pipe, which can reliably and easily fill a bonding agent and obtain stable watertight performance and bonding strength. The purpose is to

(Means for Solving the Problems) The method for connecting a branch connection pipe joint to a ribbed pipe according to the present invention, as set forth in claim 1, includes a socket part for receiving an end of a branch pipe and a hole formed in the ribbed pipe. A branch connection pipe consisting of a branch connection pipe having a connection part connectable to the branch hole, and a saddle part having a connection port connectable to the branch connection pipe and curved to approximately follow the rib outer circumference of the ribbed pipe. A method for joining a joint to a circumferential wall of a ribbed pipe having a large number of annular ribs on the outer circumferential surface, the method comprising: providing a convex body on the bonding surface of a saddle portion along the outer circumference of the ribs to reduce the space between the ribs; At the same time, a branch connecting pipe is inserted into the connection port of the saddle part so that the connecting part of the branch pipe connecting pipe protrudes toward the joint surface side of the saddle part, and a branch pipe bored in the peripheral wall of the ribbed pipe is inserted. Apply a bonding agent to the outer peripheral surface of the ribbed tube near the hole, insert the connection part of the branch pipe connection pipe into this branch hole, and press the joint surface of the saddle part to the surface of the bonding agent to remove the convex body. It is press-fitted into a bonding agent.

Further, the method for connecting a branch connection pipe joint to a ribbed pipe according to the present invention, as described in claim 2, provides a connection that can be connected to a socket part for receiving an end of a branch pipe and a branch hole drilled in a ribbed pipe. A branch connecting pipe joint consisting of a branch connecting pipe having a section, and a saddle part joined to the branch connecting pipe and curved approximately along the rib outer periphery of the ribbed pipe, and having a large number of annular ribs on the outer peripheral surface. This is a method for bonding to the peripheral wall of a ribbed pipe, in which a bonding agent is applied to an appropriate location on the outer periphery of the ribbed tube, and a flexible saddle portion is pressed against the surface of the bonding agent to tightly bond it to the bonding agent. ,
After curing and hardening the saddle part in this state, a branch hole penetrating into the ribbed pipe is drilled from the upper part of the saddle part, a connecting part of the branch pipe connecting pipe is inserted into the branch hole, and this branch pipe connecting pipe is attached to the saddle. It is connected to the part.

(Function) The joining method of the present invention, as set forth in claim 1, first provides a convex body on the joint surface of the saddle portion along the outer periphery of the ribs to reduce the space between the ribs, and Insert the branch pipe connection pipe into the mouth so that the connection part of the branch pipe connection pipe protrudes toward the joint surface side of the saddle part.On the other hand, the ribbed pipe near the branch hole drilled in the peripheral wall of the ribbed pipe Apply a bonding agent to the outer circumferential surface.Then, insert the connection part of the branch pipe connection pipe into this branch hole, and press the bonding surface of the saddle part to the surface of the bonding agent.This causes the convex body to contact the bonding agent. The bonding agent is press-fitted between the saddle portion and the ribbed tube, and the bonding agent is compressed and filled in a dense state between the saddle portion and the ribbed tube, and the saddle portion and the ribbed tube are forcefully joined.

In addition, in the joining method of the present invention as described in claim 2, first, a joining agent is applied to an appropriate location on the outer periphery of a ribbed pipe, and a flexible saddle portion is pressed onto the surface of the joining agent, and cured and hardened. . In this state, the saddle part is flexible, so it adheres tightly to the surface of the bonding agent without creating any gaps, and the bonding agent is tightly compressed and filled between the saddle part and the ribbed tube, and cures and hardens. .

Thereafter, a branch hole penetrating into the ribbed tube is formed from the upper part of the saddle portion, and the connecting portion of the branch pipe connecting tube is inserted into the branch hole and joined. This allows the branch connecting pipe to be easily joined to the ribbed pipe.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIGS. 1 and 2 show a pipe joint 2 for branch connection to a ribbed pipe 1 (hereinafter referred to as a pipe joint at the end). ) is a process diagram illustrating a connection method.

That is, the branch connecting pipe 22 and the saddle member 21 are joined to form an integral branch connecting pipe joint 2 (hereinafter simply referred to as a pipe joint).

), while a branch hole 12 bored in the peripheral wall of the ribbed tube 1
A bonding agent 3 is applied to the outer circumferential surface of the ribbed bamboo tube 1 in the vicinity, and the branch connecting pipe 22 of the pipe fitting 2 is inserted into this branch hole 12, and the bonding surface of the saddle portion 21 of the tube fitting 2 is applied to the surface of the bonding agent 3. The convex body 26 provided on the saddle portion 21 is press-fitted into the bonding agent 3 by pressing the two.

The ribbed tube 1 has a large number of annular ribs 11 on its outer peripheral surface, and is made of synthetic resin, ceramic, metal, or a composite material thereof. Note that the ribbed tube 1 according to the present invention is not limited to a simple collar-shaped annular rib 11 as shown in FIG. It may have a trapezoidal cross-sectional shape as shown in FIG. 10B, or a rectangular cross-sectional shape as shown in FIG.

The pipe joint 2 includes a saddle portion 21 joined to the outer periphery of the rib 11 of the ribbed pipe 1, a branch pipe connecting pipe 22 that receives the end of a branch pipe (not shown) connected to the ribbed pipe 1, and a ribbed pipe 1. It has a convex body 26 interposed between the ribs 11 of 1,
Molded from synthetic resin material.

The saddle portion 21 is curved so as to roughly follow the outer circumference of the rib 11 of the ribbed tube 1, and a connection port 25 into which the branch connection tube 22 is inserted is formed approximately in the center thereof. . Although the saddle portion 21 has a rectangular shape in this embodiment, it is not limited to this, and may be square, circular, oval, or the like.

The branch pipe connection pipe 22 is composed of a connection part 23 connected to the branch hole 12 of the ribbed pipe 1, and a socket part 24 for receiving an end of the branch pipe (not shown). Connection part 2
3 is curved so that its lower end opening surface matches the branch hole 12 when connected to the ribbed tube 1, and has a branch on the outer circumferential surface of the lower end, as shown in FIGS. Hole 1
A gasket 231 is formed that tightly fits around the peripheral edge of 2. Further, the socket portion 24 has an annular groove 241 formed along the circumferential direction on the inner wall surface thereof, and an O-ring (not shown) in contact with the outer circumferential surface of the end of the branch pipe is provided in the annular groove 241. Inserted. In addition, the branch connecting pipe 22 that looks like this
are designed to be joined together by inserting the connecting portion 23 into the connecting port 25 of the saddle portion 21. In this embodiment, a connection port 25 protruding from the saddle portion 21 is used.
Although the configuration is such that the connecting portion 23 of the branch pipe connecting pipe 22 is inserted into the seat, the saddle portion 21 and the branch pipe connecting pipe 22 may be integrally molded from the beginning, as shown in FIG. Also,
As shown in FIG.
The flange portion 28 may be integrally joined by abutting the surface of the saddle portion 21.

The convex body 26 is located between the ribs 11 of the ribbed tube 1, that is, in the area around the branch hole 12 of the ribbed tube 1 and covered by the saddle portion 21 of the pipe fitting 2.・・・
The ribs 11 are interposed between the ribs 11 to reduce the space between them. The convex body 26 is made of a synthetic resin material and protrudes from the joint surface of the saddle portion 21 . Further, the convex body 26 has a triangular cross section, as shown in FIGS. 1 and 2. Such a convex body 26 is provided at multiple locations (three locations in this embodiment) in the circumferential direction of the saddle portion 21 of the pipe joint 2 during use, and has an appropriate length, and its width is as follows: The spacing between the ribs 11 of the ribbed tube 1 is approximately equal to or slightly narrower.The shape of the convex body 26 is not limited to that described above, for example, as shown in FIG. It may have a semicircular cross-section as shown in FIG. 8, or it may have an arrow-shaped cross-section as shown in FIG.

Next, a method of connecting the pipe fitting 2 as described above to the ribbed pipe 1 will be explained.

As shown in FIGS. 1 and 2, first, a branch hole 12 is bored at a predetermined location of the ribbed tube 1. As shown in FIG. The diameter of this branch hole 12 is approximately equal to the outer diameter of the connecting portion 23 of the pipe joint 2.

Next, a filling type bonding agent 3 is placed between the ribs 11 in the area surrounding the branch hole 12 and covered by the saddle portion 21 of the pipe fitting 2.
Fill it. At this time, the bonding agent 3 is applied to the rib 1 of the ribbed tube 1.
Fill it so that it is a little higher than the height of 1. Further, as the bonding agent 3, for example, epoxy-based Nislotite (trade name manufactured by Block Chemical Industry Co., Ltd.) or the like can be used.

Next, connect the connection part 23 of the pipe joint 2 with its packing 231.
. Tighten and fix with a locking band (not shown) or the like.

Then, the convex body 26 provided on the joint surface of the saddle portion 21 is press-fitted into the bonding agent 3, and the bonding agent 3 is compressed and filled in a dense state between the saddle portion 21 and the ribbed tube 1. ,
In addition to preventing the entrapment of air bubbles at the interface between the joining surface of the saddle part 21 and the surface of the joining agent 3, so-called deaeration such as removing the air bubbles contained inside the joining agent 3 is performed, and the saddle part 21 and the ribbed tube 1 are joined together. do.

In addition, on both ends of the saddle part 21 in the circumferential direction, marks shown in FIG.
) and the same figure (as shown in bl), the rib 1 of the ribbed tube l
Hanging wall 20 with a notch 201 that matches 1...
If this is formed, the compression filling between the saddle portion 21 and the ribbed tube 1 will be stronger.

Finally, the bonding agent 3 is aged and hardened to complete the connection work.

In this state, the convex body 26 functions as a so-called anchor, and the pipe joint 2 is firmly joined to the ribbed pipe 1.

[Second example] This embodiment is shown in FIGS. 9 to 11.

In this example, unlike the first embodiment described above, a bonding agent 3 is applied to an appropriate location on the outer periphery of the ribbed tube l, and a flexible saddle portion 21 is pressed onto the surface of the bonding agent 3 to cure and harden. After that, a connection port 25 and a branch hole 12 are drilled through the rib extension pipe 1 from the upper part of the saddle portion 21, and a connection portion 23 of the branch pipe connection pipe 22 is inserted into the connection port 25 and the branch hole 12. The branch pipe connecting pipe 22 is connected to the saddle portion 21 by using the above-described method.

That is, the configuration is the same as that of the first embodiment, except that the connection port 25 of the saddle portion 21 and the branch hole 12 of the ribbed tube 1 are formed after the saddle portion 21 is once joined to the ribbed tube 1. ing. Note that the same components are given the same reference numerals.

The connection method will be explained.

As shown in FIGS. 9 to 11, first, the pipe with spout 1
A filler type bonding agent 3 is applied to a predetermined location. This coating area is approximately equal to the area of the saddle portion 21.

Next, the bonding surface of the saddle portion 21 is pressed against the surface of the bonding agent 3, and the saddle portion 21 is tightened and fixed from the outside using a wire 5, a locking band (not shown), or the like. At this time, the saddle part 21 is flexible so that it can easily adhere to the surface of the bonding agent 3. Further, in the case of the saddle portion 21 having a protruding convex body 26 as in the first embodiment, it is preferable to fill the bonding agent 3 in a dense state. The body 26 may not be protruding and may be in a smooth state, or the convex body 26 may be partially protruding.

Then, the convex body 26 provided on the bonding surface of the saddle portion 21 is press-fitted into the bonding agent 3, and the bonding agent 3 is compressed and filled in a dense state between the saddle portion 21 and the ribbed tube l. ,
The saddle portion 21 and the ribbed tube 1 are joined. At this time, as shown in FIGS. 4(a) and 4(b), the ribs 11 of the ribbed tube 1 are attached to both ends of the saddle portion 21 in the circumferential direction.
If the hanging wall 20 is formed with notches 201 that match the above, the compressive filling between the saddle portion 21 and the ribbed tube 1 will be stronger.

Then, in this state, it is cured and hardened.

Thereafter, a connection port 25 and a branch hole 12 are bored through the rib elongated pipe 1 from the upper part of the saddle portion 21, and the connection port 25
Insert the connecting part 23 of the branch pipe connecting pipe 22 from there.

Then, with the branch hole 12 and the branch pipe connection pipe 22 communicating with each other, the branch pipe connection pipe 22 is joined to the saddle portion 21, and the work is completed.

In this embodiment, as shown in FIGS. 10 and 11, a flange portion 28 is formed on the branch connecting pipe 22, and the flange portion 28 is bonded to the surface of the saddle portion 21 to be integrally joined. The structure is shown in Fig. 12(a).
and (as shown in bl, a connection port 25 is provided in advance on the saddle portion 21, and the connection portion 23 of the branch pipe connection pipe 22 is inserted by drilling the inside of the connection port 25. Furthermore, as shown in FIG. 13, a branch connecting pipe 22 having a flange portion 29 having approximately the same area as the saddle portion 21 is configured to be joined to the saddle portion 21. There may be.

In this case, the saddle portion 21 and the branch pipe connecting pipe 22 can be firmly joined.

In addition, in this embodiment, the saddle portion 2 is simply placed on the surface of the bonding agent 3.
However, as shown in FIGS. 14 to 17, a cut 13 is formed on the surface of the ribbed tube 1.
When pressure welding is performed by inserting the short pipe 4 into the notch 13 and creating a section 14 in which the bonding agent 3 is not filled, this section 14 serves as a place for excess bonding agent 3 to escape, thereby achieving stable bonding. be able to. At this time, as shown in FIGS. 4(a) and 4(b), notches 201 are provided at both ends of the saddle portion 21 in the circumferential direction, which match with the ribs 11 of the ribbed tube 1.
If the hanging wall 20 is formed with ..., the compressed filling between the saddle portion 21 and the ribbed tube 1 will be stronger. Further, at this time, by providing a small hole 15 in the position of the saddle portion 21 corresponding to the section 14, sufficient deaeration can be performed.

Further, when a reactive urethane-based bonding agent 3 is used as the bonding agent 3, this section 14 serves as an escape area for the foaming gas during the reaction, which is preferable for deaeration. However, when the connection port 25 and the branch hole 12 are bored in the saddle part 21 and the ribbed tube 1, the section 14 and the small hole 15 are
-II, it must be provided within a range smaller than the diameters of the connection port 25 and the branch hole 12.

(Effects of the Invention) As described above, according to the present invention, the convex body provided on the joint surface of the saddle portion is press-fitted into the joint agent on the outer peripheral surface of the ribbed tube, so that the joint agent is applied to the joint between the pipe joint and the ribbed tube. Even if the bonding agent is loosely filled, it is possible to easily join the pipe fitting and the ribbed pipe while ensuring the bonding strength and sealing performance. It is possible to ensure quality with simple construction management.

In addition, by pressing the flexible saddle against the surface of the bonding agent, the bonding agent cures and hardens while being densely compressed and filled between the saddle and the ribbed tube. Even in the filled state, the saddle part and ribbed tube can be easily joined while ensuring joint strength and sealing performance.Furthermore, in this state, connection ports and branch holes can be drilled in the saddle part. Since the branch connecting pipe is joined to the ribbed pipe, the branch connecting pipe can be easily joined to the ribbed pipe, and quality can be ensured with simple construction management.

[Brief explanation of drawings]

1 to 8 show drawings according to the first embodiment of the present invention, FIG. ) is a front view of the same, FIG. Figures 3 (fat) to (c) are partially cutaway side views showing other shapes of the ribs of the ribbed tube, Figure 4 (a) is a side view showing other shapes of the saddle part, and Figure 4 (bl is The front view of the same, FIG.
Fig. 6 (Al is a vertical cross-sectional side view showing still another joint state of the saddle portion and the branch pipe connecting pipe, Fig. 6 (b) is a front view of the same, Fig. 7 is a longitudinal cross-sectional view showing another shape of the convex body) 8 is a longitudinal sectional side view showing still another shape of the convex body, FIGS. 9 to 17 are drawings according to the second embodiment of the present invention, and FIG. 9(a) is a side view of the saddle. Fig. 9 is a partially cutaway side view showing the state of connection between the saddle part and the ribbed pipe, and Fig. 9 is a front view of the same, and Fig. 1O (a) is a portion showing the state in which the branch pipe connection pipe is joined to the saddle part and the ribbed pipe. Broken side view, Figure 10 (bl is the same front view, Figure 1
Figure 1 (al is a partially broken side view showing the state in which the pipe joint is joined to the ribbed pipe, Figure 11 (bl is the front view of the same, Figure 11 (
Fig. 12(a) is a partially cutaway side view showing a state in which a saddle portion of another shape is joined to a ribbed tube;
Figure 2 (OD) is a partially cutaway side view showing the connection port and branch hole drilled in the saddle part of Figure 1 (I), and Figure 13 shows a branch connecting pipe of another shape joined to the ribbed pipe. Partially broken side views showing the state, FIGS. 14 to 17 show other embodiments in which the saddle part is joined to the ribbed tube, and FIG. 14(a) shows the state in which a notch is provided in the ribbed tube. Plan, 14th
Figure (b) is a partially cutaway front view of the same part, Figure 15(a) is a plan view showing a ribbed tube with partitions, Figure 5 (bl is a partially broken front view of the same part), Figure 16 (al 16 is a plan view showing the saddle portion with a small hole joined to the ribbed tube, FIG. 16 is a partially cutaway front view of the same portion, and FIG. Fig. 17(b) is a plan view showing the state in which the hole is drilled, and Fig. 17(b) is a partially cutaway front view;
FIG. 8 is a partially cutaway side view showing a conventional example. ... Ribbed pipe 11 ... Rib 12 ... Branch hole ... Branch connection pipe joint 21 ... Saddle section 22 ... Branch connection pipe 23 ... Connection section 24 ... Socket section 25... Connection port 26... Convex body 3... Bonding agent

Claims (1)

[Scope of Claims] 1) A branch pipe connection pipe having a socket part for receiving the end of the branch pipe and a connection part connectable to a branch hole drilled in a ribbed pipe, and a connection port connectable to the branch pipe connection pipe. A method for joining a branch connection pipe joint consisting of a saddle part curved so as to substantially follow the rib outer periphery of a ribbed pipe to the peripheral wall of a ribbed pipe having a large number of annular ribs on the outer peripheral surface. A convex body is provided on the joint surface of the saddle portion along the outer periphery of the ribs to reduce the space between the ribs, and a branch pipe connection pipe is inserted into the connection port of the saddle portion to connect the branch pipe connection pipe. While protruding from the joint surface side of the saddle part, a bonding agent is applied to the outer circumferential surface of the ribbed pipe near the branch hole drilled in the peripheral wall of the ribbed pipe, and the connection part of the branch pipe connection pipe is inserted into this branch hole. Insert
A method for connecting a branch connection pipe joint to a ribbed pipe, characterized in that the convex body is press-fitted into the bonding agent by pressing the bonding surface of the saddle portion against the surface of the bonding agent. 2) A branch connecting pipe that has a socket for receiving the end of the branch pipe and a connecting part that can be connected to a branch hole drilled in the ribbed pipe, and a branch connecting pipe that is connected to the branch pipe and has approximately the outer circumference of the rib of the ribbed pipe. A branch connection pipe joint consisting of a saddle part curved along the
A method for bonding to the peripheral wall of a ribbed tube having a large number of annular ribs on the outer circumferential surface, the method involves applying a bonding agent to an appropriate location on the outer circumference of the ribbed tube, and forming a flexible saddle portion on the surface of the bonding agent. After the saddle part is cured and hardened in this state, a branch hole is drilled through the ribbed pipe from the upper part of the saddle part, and the connection part of the branch pipe connection pipe is inserted into the branch hole. A method for connecting a branch connection pipe joint to a ribbed pipe, characterized by inserting the branch connection pipe into the saddle and joining the branch connection pipe to a saddle portion.