JP2000227180A - Pipe connection joint and pipe connecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe connection joint and a pipe connecting method, wherein the end parts of regenerating pipes for lining the inner surface of an existing long pipe bank are connected to each other without any gaps, and there is no need to prepare any additional special materials for making the joint. SOLUTION: In a pipe connection joint 1 for connecting the end parts of regenerating pipes made of long plate-like bodies and formed by spirally winding a profile 3 having a sectional shape, in which a top part 31 and a valley part 32 are alternately formed, to execute a lining layer on the inner surface of an existing pipe bank, the end parts of the regenerating pipes 5 having sectional shapes similar to that of the profile 3 formed in the regenerating pipe are engaged with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting joint and a pipe connecting method for rehabilitating an aging long section of an existing sewer without excavating above the ground and around manholes.

[0002]

2. Description of the Related Art In order to construct a lining layer in an aged section of an existing sewer, a profile made of a long plate-like body is spirally wound using a pipe-forming machine to form a rehabilitated pipe. If the length of the profile is not enough or the ends are to be used effectively, it may be necessary to connect the ends of the rehabilitation pipes with a joint.

[0003] At this time, for example, Japanese Patent Application Laid-Open No.
In the case of the invention described in Japanese Patent No. 54583, since the shape and the diameter at the time of pipe production are different from those of the other rib-shaped parts depending on the lock shape of the fitting part, the rib part of the joint is formed by the rib of the pipe (profile). It may not be possible to pass through the part and as a result the joint may not be able to be inserted. Further, when the profile shape is determined according to the fitting portion, the clearance becomes large in other rib portions, which may cause water leakage as it is, and the amount of use of the filler increases when using a filler. In the case of an in-core joint, an exclusive joint or a profile for making a joint is separately required.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and is intended to remove the ends of a rehabilitation pipe lining the inner surface of an existing long sewer. An object of the present invention is to provide a pipe connection joint and a pipe connection method that can be connected without gaps and do not require a special material to prepare a joint.

[0005]

Means for Solving the Problems The invention of claim 1 of the present application (invention 1) comprises a long plate-like body for forming a lining layer on the inner surface of an existing sewer, and has a sectional shape. A pipe connection joint for connecting ends of a rehabilitated pipe formed by spirally winding a profile in which a peak and a valley are alternately formed by using a pipe making machine, wherein the pipe is formed on the rehabilitated pipe. It has the same cross-sectional shape as the profile provided, and the ends of the rehabilitation pipe can be fitted together.

[0006] The invention of claim 2 of the present application (invention 2) consists of a long plate-like body for forming a lining layer on the inner surface of an existing sewer, and its cross-sectional shape has a peak and a valley. A step of forming a rehabilitated pipe by spirally winding the alternately formed profiles using a pipe making machine and inserting the rehabilitated pipe into an existing pipe; a step of cutting the rehabilitated pipe; A step of winding around the end of the rehabilitation pipe using a pipe connection joint having the same cross-sectional shape as the profile forming the pipe, fitting each crest and valley to produce a pipe, Further, the method includes a step of forming pipes and a step of rotatingly inserting the rehabilitated pipes into the pipe connection joint.

[0007]

The pipe connection joint according to the first aspect of the present invention is formed of a long plate-like body for lining a layer on the inner surface of an existing pipe.
A pipe connection joint for connecting the ends of a rehabilitated pipe whose cross-sectional shape is formed by spirally winding a profile in which peaks and valleys are alternately formed using a pipe-forming machine, Has the same cross-sectional shape as the profile formed on the rehabilitation pipe,
Since the ends of the rehabilitation pipe can be fitted to each other, it is not necessary to prepare a special material separately in order to form a joint. Since rehabilitating pipes and joints are made by the same pipe making machine, no special equipment is required for making joints. The size can be adjusted arbitrarily on site. Since all tubes have the same outer shape (or inner shape of the joint), an arbitrary rib can be selected to set the inner shape of the joint.

According to the pipe connection method of the second aspect of the present invention, the lining layer is applied to the inner surface of the existing sewer, so that the pipe connection method is formed of a long plate-like body, and the cross-sectional shape of the pipe is alternately formed with peaks and valleys. A step of forming a rehabilitated pipe by spirally winding the profile using a pipe making machine, inserting the rehabilitated pipe into an existing pipe, a step of cutting the rehabilitated pipe, and a profile for forming the rehabilitated pipe Winding around the end of the rehabilitation pipe using a pipe connection joint having the same cross-sectional shape as above, and fitting the respective ridges and valleys to produce a pipe, and further producing a rehabilitation pipe similar to the above. And a step of rotatingly inserting the rehabilitated pipes into the pipe connection joint, so that it is not necessary to prepare a special material separately in order to make the joint. Since rehabilitating pipes and joints are made by the same pipe making machine, no special equipment is required for making joints. The size can be adjusted arbitrarily on site. Since all tubes have the same outer shape (or inner shape of the joint), an arbitrary rib can be selected to set the inner shape of the joint. Then, the rehabilitating pipes can be connected to each other without gaps by the joints, and the lining layer of the old pipe, which is deteriorated and long, can be constructed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a pipe connection joint and a pipe connection method of the present invention, and FIG. 2 is an enlarged cross-sectional view of a part of the pipe connection part of FIG. As shown in FIG. 1, in a pipe connecting joint 1, in order to construct a lining layer on an inner surface of a pipe 2 in an existing pipe 2, a profile 3 made of a long plate-like body is used by using a pipe making machine. The ends of the rehabilitation pipe 5 formed by helically winding are connected to each other. As shown in FIG. 2, the pipe joint 1 has the same shape as the profile 3 forming the rehabilitation pipe 5, and the crests 31 having the same outer surface shape in both the fitting portion and the other rib portions are repeated. , The mountain part 3
A profile 3 having a peak 31 and a symmetrical valley 32 between 1 is used, and the profile 3 is turned upside down and spirally wound, and is manufactured in an inner shape equivalent to the outer shape of the rehabilitation pipe 5.

In the pipe connection method of the present invention, as shown in FIG. 1, a tubing machine 4 is used to spirally wind the tubing and rehabilitate the pipe 4 and insert the rehabilitation pipe 4 into an existing pipe. Fig. 2
As shown in the figure, the ridges 31 have the same shape as the profile 3 forming the rehabilitating pipe 5, and the outer surface shape of the fitting portion and the other rib portions is the same. The pipe connection joint 1 having an inner shape equivalent to the outer shape of the rehabilitating pipe 5 is manufactured by turning over the profile 3 having the valley portion 32 symmetrical to the pipe 31, and the rehabilitating pipe 5 similar to the above is further manufactured. The rehabilitation pipes 5 are inserted by rotation.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pipe connection joint and a pipe connection method of the present invention will be described with reference to examples. As the rehabilitating material to be used, a profile, a reinforcing material, and a metal built-in profile were used.
The shape of the profile may be based on any of those shown in FIGS. 3 and 4, but can be mutually fitted with the outer surface of the rehabilitating pipe rib when the joint is made upside down. The ridges 31 having the symmetrical rib shape and the substantially same shape of the rib main body and the fitting portion main body are repeated so that the ridges 31 can be screwed and joined. The one having the portion 32 was used. When a reinforcing material described later was used, the outer shape fitted with the reinforcing material was the same as the outer shape of the other rib / fitting portion. As the material of the profile, a synthetic resin having flexibility such as polyvinyl chloride, polyethylene, polypropylene, and fiber reinforced plastic is generally used, and is integrally formed by extrusion or the like. Seal part is hot melt type adhesive,
It is performed by elastomer coextrusion, adhesion, fusion, welding, and the like.

The reinforcing member can be inserted into the profile T-rib, and at the time of fitting, as shown in FIG. 5, the outer shape of the reinforcing member is the same as that of the other rib portions / fitting portions. The material is preferably a metal such as galvanized steel, stainless steel, iron or the like, and is coated on the surface to prevent corrosion.

The metal built-in profile is a profile in which a flat plate made of metal (iron, stainless steel, aluminum, etc.), a flat plate with projections, and the like are built in the conventional profile and the two-piece profile. As the material of the profile, a synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, and fiber reinforced plastic having flexibility is preferably used, and is integrally formed by extrusion or the like. The sealing portion is formed by hot-melt type adhesive, elastomer coextrusion, adhesion, fusion, welding, or the like.

The pipe forming method may be any of the "former pressing pipe forming method" and the "self-propelled pipe forming method". The profile to be used may be either one-piece type or two-piece type. In the case of the self-propelled pipe-making method, a pipe-making machine is installed inside an existing pipe, and a profile is inserted and fitted into the inside of the pipe sequentially. In the case of two pieces, the main profile is spirally wound, and the fitting-only profile is fitted immediately thereafter. Alternatively, the fitting profile may be fitted to one of the profiles just above the ground and immediately before the pipe lining. When the reinforcing member or the fitting profile of the two-piece type profile is separately fed into the pipe making, it may be fed separately from the profile from the ground, or may be set in a coiled state near the pipe making machine. In the case of the former-push-pipe method, the profile is supplied from the ground to a pipe-making machine installed in a manhole, and the formwork made by the pipe-making machine is inserted into the existing pipe while rotating. In the case of a two-piece profile, connect the connector to the profile body first on the ground and then make a spiral pipe with a pipe making machine,
Alternatively, the profile connector is supplied to the tube making machine, and both are fitted and formed at the same time, and are rotationally inserted into the existing tube.

In the case of the self-propelled pipe manufacturing method, the adjustment of the pipe making size of the rehabilitating pipe is performed after the circumferential length of the link is sequentially adjusted according to the shape and size of the pipe to be formed. The fitting roller includes a joining mechanism for fitting the profile and a guide mechanism for guiding the alignment mechanism in accordance with the profile fitting part, and is fixed to the link. The joining mechanism has a fin-shaped roller on the outer side of the tube that comes into contact with the profile rib so that it can be engaged between the ribs of the profile, and the corresponding roller is a flat-shaped roller coated with rubber or the like having a high frictional resistance. In the case of the former press-pipe-making method, a pipe-forming machine in which a joining mechanism portion is fixedly installed at a plurality of positions of a frame is used. In the size adjustment, the circumference is adjusted by changing the installation position of the joining mechanism. As a driving source to be rotated, a driving unit using hydraulic pressure, electricity, air, or the like may be separately used in addition to manual driving. However, when a drive source is separately added, it is necessary to connect a hose, a cord, and the like by a swivel joint or the like so as not to be affected by rotation.

The method for adjusting the joint size is the same as the method for adjusting the pipe size. However, in order to perform pipe production with the profile turned over, it is necessary to perform the pipe production with the positional relationship between the fin roller and the rubber roller of the joining mechanism section reversed.

After the joint is made, the joint is cut into a predetermined length and screwed into the end face of the rehabilitated pipe that has been made. At the time of screwing, if necessary, a sealing material may be applied in advance in order to secure water stoppage at the joint portion. Further, a similar type of rubber or the like may be interposed. As the water stopping material, a generally used filler or the like is used.

The connection between the joint and the rehabilitation pipe to be subsequently formed is as follows:
In the case where the diameter of the rehabilitation pipe is small, the pipe can be cut after completion of the pipe production and inserted by an operator by screwing. When the rehabilitation pipe is large diameter and long distance, in the case of self-propelled pipe production method, when continuing pipe production further from the joint part in the pipe,
At the initial stage of pipe making, the rotation of the pipe making machine itself is stopped and the rehabilitation pipe is rotated. (In this case, the rehabilitating pipe is rotated and the pipe length is gradually increased while rotating. In this case, the rehabilitating pipe is directly screwed into the joint part by utilizing the rotation and progress. The application of the filler is performed in the same manner as in the case of the small diameter. In the case of the original pressed pipe system, for example, a case is considered in which the pipes are advanced from each of the upstream manhole and the downstream manhole, and connected at the middle part by butt connection.In this case, as in the self-propelled pipe manufacturing method, The rehabilitating pipe is screwed into the joint using the rotational force of the pipe-making machine.

[0019]

The pipe connection joint and the pipe connection method of the present invention are as follows.
As described above, it is not necessary to prepare a special material separately in order to form a joint. Since rehabilitating pipes and joints are made by the same pipe making machine, no special equipment is required for making joints. The size can be adjusted arbitrarily on site. Since all tubes have the same outer shape (or inner shape of the joint), an arbitrary rib can be selected to set the inner shape of the joint. Then, the rehabilitating pipes can be connected to each other without gaps by the joints, and the lining layer of the old pipe, which is deteriorated and long, can be constructed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a pipe connection joint and a pipe connection method of the present invention.

FIG. 2 is an enlarged cross-sectional view of a part of a pipe connection part of FIG.

FIG. 3 is a sectional view showing an example of a profile used in the present invention.

FIG. 4 is a cross-sectional view showing another example of a profile used in the present invention.

FIG. 5 is a cross-sectional view showing an example of a profile with a reinforcing material of a profile used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe connection joint 2 Sewer 3 Profile 4 Pipe-making machine 5 Rehabilitation pipe 31 Mountain part 32 Valley part

Claims (2)

[Claims] A lining layer is constructed on an inner surface of an existing sewer, and a profile formed of a long plate-like body having a cross-sectional shape in which peaks and valleys are alternately formed is used for a pipe-making machine. A pipe connection joint for connecting the ends of a rehabilitation pipe formed by spirally winding using the same, has the same cross-sectional shape as a profile formed on the rehabilitation pipe, and the ends of the rehabilitation pipe are connected to each other. A pipe connection joint, which can be fitted. 2. A pipe-forming machine for forming a lining layer on the inner surface of an existing sewer, which is formed of a long plate-like body, and whose cross-sectional shape is formed with alternating peaks and valleys. A step of forming a rehabilitating pipe by spirally winding the pipe using the same and inserting the rehabilitating pipe into an existing pipe, a step of cutting the rehabilitating pipe, and a pipe having the same cross-sectional shape as a profile forming the rehabilitating pipe Winding around the end of the rehabilitation pipe using a connection joint, fitting each ridge and valley to produce a pipe, a step of further producing a rehabilitation pipe similar to the above, and the pipe connection joint A pipe connection method, comprising a step of rotatingly inserting these rehabilitation pipes.