JPH0324397A - Construction method for connecting drain pipe to sewerage main pipe and its connecting device - Google Patents

Abstract

PURPOSE:To ensure sealing by inserting a balloon-shaped inside supporting body into a sewerage main pipe and expanding it by means of air and the like to block a lower opening and then taking it out, in a construction method wherein a supporting pipe is inserted into the connecting hole of the sewerage main pipe and sealed by mortar to connect a drain pipe. CONSTITUTION:A supporting pipe 4 is inserted into the connecting hole 2 of a sewerage main pipe 1 and also mortar 20 is injected therein. To connect the supporting pipe 4 to a drain pipe, a flange portion 6 to be made to abut against the sewerage main pipe 1 is provided around the outer periphery of the inserted portion 5 of the supporting pipe 4 and is used for blocking the space between the connecting hole 2 and the supporting pipe 4. A balloon-shaped inside supporting body 14 is inserted into the sewerage main pipe 1 and is expanded by fluids such as air, water and the like and thus the pace 25 is blocked by the inside supporting body 14, and mortar 20 is injected therein and solidified. Thereafter, the inside supporting body 14 is taken out. As a result, sealing of the connecting portion is ensured and sealing work is extremely simplified.

Description

[Detailed Description of the Invention] "Field of Industrial Application" The present invention relates to a connection method and a device for connecting a drain pipe to a main sewer pipe, and particularly relates to a connection method for connecting a drain pipe to a main sewer pipe, and in particular, a support pipe is connected to a connection hole formed in a main sewer pipe. The present invention relates to a connection method and a device for connecting a drain pipe to the support pipe by inserting the drain pipe into the support pipe and injecting mortar into the gap between the support pipe and the support pipe to seal the gap. ``Prior art'' Conventionally, when connecting a drainage pipe made of plastic or the like to a sewer main pipe laid horizontally underground, a support pipe is inserted into a connection hole formed in the main pipe of the lower wooden path, and the support pipe is inserted into the connection hole. There is a construction method in which mortar is injected into the gap between the drain and the support pipe to seal it, and a drainage pipe is connected to this support pipe. ``Problem to be solved by the invention'' In the above-mentioned connection method, when mortar is injected into the gap between the connection hole and the support pipe, conventionally the mortar flows down into the inside and outside of the main sewer pipe, making it impossible to ensure a secure seal. The disadvantage was that it was not possible to connect the drain pipe to an existing sewer main pipe, and the workability was particularly poor when connecting the drain pipe to an existing sewer main pipe. The first object of the present invention is to solve the above-mentioned drawbacks of the conventional method of connecting drain pipes to sewer main pipes, and to ensure that mortar can be injected reliably without flowing into the inside and outside of the main sewer pipe, and that it has good sealing properties. The purpose of this invention is to provide a drainage pipe connection method that improves the quality of water. A second object of the present invention is to provide a connecting device that is optimal for implementing the above-mentioned construction method. "Means for Solving the Problem" The method for connecting a drain pipe to a main sewer pipe according to the present invention includes inserting a support pipe into a connection hole formed in the main sewer pipe when connecting the drain pipe to the main sewer pipe. At the same time, in the method of connecting a drain pipe to the main pipe, mortar is injected into the gap between the connection hole and the support pipe to seal it, and the drain pipe is connected to the support pipe. A flange portion that comes into contact with the outer surface of the sewer main pipe is provided on the outer periphery of the insertion pipe portion of the support pipe, and the upper side of the gap between the connection hole and the support pipe is closed with the flange portion,
A balloon-shaped internal support is inserted into the interior of the sewer main pipe via an attachment pipe, and a fluid such as air or water is injected into the internal support to expand it, so that the skin of the internal support is inserted into the lower part of the gap. This method is characterized by closing the opening, injecting mortar through the injection hole formed in the flange of the support pipe, and after the mortar hardens, the fluid is removed and the internal support is taken out. Also, the connection of the drain pipe to the water main according to the present invention'! A
When connecting a drain pipe to a main sewer pipe, a support pipe is inserted into a connection hole formed in the main sewer pipe, and mortar is injected into the gap between the connection hole and the support pipe to seal the support pipe. This is a connection device for a drain pipe to a main sewer pipe, which connects a drain pipe to a main sewer pipe. A support pipe that is provided with a contacting flange and a mortar injection hole formed in the flange, and a balloon that is inserted into the sewer pipe through the support pipe and expands by injecting air or a fluid such as wood. The upper side of the gap between the connection hole and the support tube is closed with the flange part of the support tube, and the lower opening of the gap is closed with the expanded skin of the internal support, thereby forming a mortar. This is a connecting device that allows mortar to be injected through the injection hole. "Sakugawa" The length of the insertion tube at the tip of the support tube corresponds to the wall thickness of the connection hole formed in the sewer main pipe, and when the single core insertion tube section is inserted into the connection hole formed in the sewer main pipe, The flange provided on the outer periphery of the insertion pipe comes into contact with the outer surface of the sewer main pipe. This allows the tip of the insertion pipe to be set in place without protruding into the main sewer pipe, and the flange closes the upper part of the gap between the connection hole and the support pipe. In this case, if an adhesive sealant is pasted on the lower outer surface of the flange portion in advance, the support pipe can be temporarily fixed to the sewer main pipe, and the bondability between the flange portion and the outer surface of the sewer main pipe can be improved. Can be done. Next, the balloon-shaped internal support is lowered from the support pipe into the inside of the sewer main pipe, and when a fluid such as air or water is injected from the hose connected to the rear of the internal support, the internal support expands. The epidermis closes the lower opening of the gap. Therefore, the L side of the gap is closed by the flange of the support tube, and the lower opening is closed by the skin of the inner support. In this state, when mortar is injected through the injection hole formed in the flange of the support tube, the mortar fills the annular gap and seals it securely. In addition, as mentioned above, if the gap is highly occluded due to pasting a sealant on the flange, etc., it is advisable to provide an air vent hole in the flange. After the mortar has solidified, the fluid is removed from the internal support and it is pulled up through the support pipe in a deflated state, and a drain pipe is connected to the support pipe and the material is backfilled. ``Example'' An example of the method of connecting a drain pipe to a main sewer pipe according to the present invention will be explained together with the connecting device shown in Figs. 1 to 3. Figure 1 is an exploded perspective view showing the drain pipe and support pipe, Figure 2 is a perspective view of the internal support, and Figure 3 is an exploded view showing how the support pipe is connected to the main sewer pipe. In the figure, l is the main sewer pipe, 2 is a connection hole formed in the main sewer pipe l, and 3 is a drain pipe for draining sewage and rainwater, which is connected to the main sewer pipe l via a support pipe 4. Connected. The support tube 4 includes an insertion tube section 5 to be inserted into the connection hole 2 and a flange section 6 provided on its outer periphery. When the part 5 is inserted into the connection hole 2, a gap 25 is formed between the connection hole 2 and the insertion pipe part 5, but the flange part 6 comes into contact with the outer surface 1a of the sewer main pipe l, and this flange part 6 Two parts of the gap 25 are closed. A mortar injection hole 7 is formed in this flange portion 6. To explain in detail the structure of the support pipe 4, the support pipe 4 is made of synthetic wood 1.
It consists of a main pipe 8 and a flange pipe l1 shaped by rl'1 etc., and the rear part of the main pipe 8 has a large diameter part 9 for inserting and connecting the drain pipe 3, and the front part has a small diameter part 9. The flange part 11 is provided with the flange part 6 at the lower end of the collar part 12, and is fixed by inserting the small diameter part 10 of the main pipe 8 into the collar part l2. The insertion tube section 5 is formed by projecting the tip of the small diameter section 10 below the flange section 6. This insertion tube part 5
The length is the wall thickness Is of the sewer main pipe l in the connection hole 2
Furthermore, a rubber packing l3 is arranged on the inner periphery of the rear end of the large diameter part 9 to seal the inserted drain pipe 3. l4 is a balloon-shaped internal support, and the rear hose l7
It is constructed so that when a fluid L such as air or wood is injected into it, it expands by 1. This internal support body 14 is constructed by sandwiching the opening of the balloon body 15 between upper and lower supporting disks 1B, and the hose 17 is attached to this supporting disk 51B.
This internal support body 14 is inserted into the sewer main pipe l through the support pipe 4 in a deflated state, and by injecting fluid L and expanding it, the lower opening of the gap 25 is closed with its skin l8. It is designed to do so. In the illustrated example, the balloon body 15 is shown to have a size that covers the inner wall surface of the sewer main pipe 1 when inflated, but the size is not limited to this. -E The shape of the balloon body 15 can be made into a shape of a biased F balloon, in short, when it is inflated, L
It is sufficient if the lower opening of the gap 25 is closed. Next, to explain a usage example, when inserting the insertion pipe part 5 of the support pipe 4 into the connection hole 2 formed in the sewer main pipe l, a gap 25 is formed between the connection hole 2 and the insertion pipe part 5. The upper part of the gap 25 is closed by the flange part 6 coming into contact with the outer wall 1a of the sewer main pipe 1. By abutting the flange portion 6 against the outer surface of the sewer main pipe 1, the tip of the insertion pipe portion 5 is set in a predetermined position without protruding into the interior of the sewer main pipe l. In this case, by pasting a sealing material l9 that can be bonded on both sides to the outer circumference of the flange portion 6, the support pipe 4 can be temporarily fixed to the sewer main pipe 1, and the flange 16 can be temporarily fixed.
It is possible to improve the connection between the pipe and the outside surface of the sewer main pipe. Next, the deflated internal support l4 is lowered into the interior of the sewer main pipe l from the support pipe 4, and when fluid L is injected from the hose l7, the internal support l4 expands, and its skin l8 forms the above-mentioned gap 2.
The lower opening of No. 5 is closed. Therefore, the gap 25 is closed at the upper side by the flange portion 6 of the support tube 4, and at the same time, the lower opening is closed by the skin 18 of the internal support body 14. In this state, when resin mortar 20 is injected through the injection hole 7 formed in the flange portion 6, the mortar 20 is filled into the annular gap 25 and is securely sealed. Note that a breathable material can be used as the sealing material 19 pasted on the flange portion 6, but by pasting the sealing material 19, the sealing property of the gap 25 becomes high, making it difficult for air to escape. In some cases, an air vent hole may be provided in the flange portion 6. After the mortar 20 has solidified, the internal support 14 is pulled out through the support tube 4 by removing the fluid L and leaving it in a deflated state. Connect the drain pipe 3 to the large diameter part 9 of the support pipe 4 and backfill. Of course, the drain pipes 3 can be added one after another. "Effects of the Invention" According to the method for connecting a drain pipe to a sewer main pipe according to the present invention, it is possible to reliably set the support pipe used when connecting a drain pipe to a lower main pipe, and The mortar injected into the gap between the connection hole formed in the main pipe and the support pipe will not leak into the inside or outside of the main sewer pipe, making it possible to seal reliably and making the work extremely easy. Furthermore, according to the connecting device according to the present invention, it is easy to construct and operate, the drain pipe can be reliably supported by the support pipe, and the internal support can be used repeatedly. effective.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the connection device d for a drain pipe to a sewer main pipe according to the present invention, FIG. 1 is an exploded perspective view showing the drain pipe and the support pipe, and FIG. Figure 3 is a perspective view of the support and a sectional view showing how the support pipe is connected to the main sewer pipe. 1: Lower wooden path main pipe, 2: Connection hole, 3: Drain pipe, 4: Support pipe 5: Insertion pipe part, B: Flange part, 7: Mortar injection hole 8
: Main pipe, 11: Flange pipe, 14: Internal support, 17: Hose 18: Skin, L: Fluid, 20: Mortar, 25: Gap 1 Figure-62 Figure 2 Figure 3

Claims (1)

[Claims] 1. When connecting a drain pipe to a main sewer pipe, a support pipe is inserted into a connection hole formed in the main sewer pipe, and mortar is injected into the gap between the connection hole and the support pipe. In a method of connecting a drain pipe to a sewer main pipe by sealing the support pipe and connecting the drain pipe to the support pipe, a flange that contacts the outer surface of the sewer main pipe is attached to the outer periphery of the insertion pipe part of the support pipe inserted into the connection hole. A balloon-shaped internal support is inserted into the sewer main pipe through the support pipe, and air is injected into the internal support. Alternatively, by injecting and expanding a fluid such as water, the lower opening of the gap is closed with the skin of the internal support, and mortar is injected through the injection hole formed in the flange of the support tube, and after the mortar has solidified, the A connection method characterized by removing the internal support by removing the fluid. 2. When connecting the drain pipe to the main sewer pipe, insert the support pipe into the connection hole formed in the main sewer pipe, and inject mortar into the gap between the connection hole and the support pipe to seal it. A connecting device for a drain pipe to a main sewer pipe, which connects a drain pipe to a main sewer pipe, the insertion pipe being inserted into a connection hole in the main sewer pipe having a flange part on the outer periphery thereof that comes into contact with the outer surface of the main sewer pipe. A support pipe having a mortar injection hole formed in the flange portion thereof, and a balloon-shaped interior that is inserted into the sewer pipe through the support pipe and inflates by injecting fluid such as air or water. The upper side of the gap between the connection hole and the support tube is closed with the flange part of the support tube, and the lower opening of the gap is closed with the expanded skin of the internal support, so that the mortar injection hole can be opened from the mortar injection hole. A connecting device characterized by being adapted to inject mortar.