JP2015003470A - Pipe lining method and pipe lining pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe lining method and a pipe lining pipe which enables thorough integration of a pipe port seal member with a pipe lining material to eliminate the possibility of leakage of a pressure fluid.SOLUTION: A pipe lining method includes a step of arranging, at an end part of conduit, a linear pipe-shaped mold in which one end covers a pipe outer peripheral part and the other end protrudes from the end part of conduit, a step of inserting a pipe lining material into the conduit, a step of adhering the pipe lining material onto the inner wall of the conduit by heating and pressure application, a step of hardening the pipe lining material by cooling to form a pipe lining pipe, a step of removing the mold and a step of winding a rubber packing around the conduit serving as the pipe port part and the outer periphery of the pipe lining pipe, attaching an end-part packing which covers the circumferential part of the end part of the pipe lining pipe, attaching a pipe port seal member composed of a fixed flange pipe, a connection flange pipe and a seal flange pipe to the pipe port part and pressing the rubber packing (6) and an end part packing (8) to seal.

Description

  The present invention relates to a pipe lining construction method and a pipe lining pipe, and more particularly to a pipe lining construction method and a pipe lining pipe that can be integrated with a pipe opening sealing material and a pipe lining material to prevent leakage of pressure fluid.

  Conventionally, a pipe lining method has been known as a method for repairing aging agricultural waterways, water pipes, industrial waterways, gas pipes, etc., and Patent Document 1 discloses a sealing method at the mouth of a pressure pipeline. Have been described. The pipe lining pipe refers to a new pipe formed by curing a pipe lining material attached in the pipe line.

  In Patent Document 1, a short tubular resin adsorbent is impregnated with a liquid curable resin, a pipe port sealing member having a flange serving as a flange at one end is installed in the pipe port, and then the same curing is applied to the tubular resin adsorbent. The pipe lining material impregnated with a conductive resin is inverted and inserted into the pipe, and the pipe mouth seal member and the pipe lining material are overlapped at the pipe mouth and cured while pressed against the wall surface of the pipe. Is described. Considering the heat shrinkage that occurs with the hardening of the pipe lining material, a gap is provided between the pipe opening and the flange of the pipe seal member, the hardening of the pipe lining material is completed, and the heat shrinkage of the pipe lining material After that, the gap was filled with resin and glass fiber and sealed.

  However, in the conventional method, since the gap between the pipe port sealing member and the pipe lining material is hardened by embedding the resin on site, there is a problem that workability deteriorates depending on the working environment. In particular, during rainy weather, there has been a problem that the integration of the pipe port sealing member and the pipe lining material is incomplete, and the pressure fluid leaks. In addition, there are cases where it depends on the skill of the operator at the site. Therefore, a pipe lining method that is not affected by the on-site environment and the skill of workers is desired.

JP 2011-25456 A

  An object of the present invention is to provide a pipe lining method and a pipe lining pipe that can completely integrate a pipe port sealing member and a pipe lining material and prevent leakage of pressure fluid.

  The pipe lining method according to the first embodiment of the present invention includes a step of installing a straight pipe-shaped form at one end of a pipe line so that one end covers the pipe outer periphery and the other end projects from the pipe end. And a step of inserting a pipe lining material inside the pipe line, a stage of heating and pressurizing to stick the pipe lining material to the inner wall of the pipe line, and a stage of cooling and hardening the pipe lining material to form a pipe lining pipe And a step of removing the formwork, and an end packing (8) covering the circumference of the end of the pipe lining pipe by wrapping a rubber packing (6) around the outer circumference of the pipe line and pipe lining pipe serving as a pipe opening. A fixed flange pipe that is attached to the outside of the pipe, a connecting flange pipe that is connected to the fixed flange pipe and that covers the pipe and the pipe lining pipe that protrudes from the pipe, and a connecting flange pipe Seals connected to Mounting and Nji tube, in a composed tube opening sealing member to the tube opening, the steps of sealing by pressing the rubber gasket (6) and end packing (8), characterized in that is provided.

  A stage in which a support pipe is inserted into a pipe mouth portion of the pipe lining pipe, or a stage in which a pipe lining material in which the plate thickness of the pipe mouth portion of the pipe lining pipe is made thicker than the plate thickness in the pipe line is prepared. It is further provided.

  The pipe lining method according to the second embodiment of the present invention is a stage in which one end is connected to an end portion of a pipe line by an outer surface band (19) and the other end is expanded in diameter, and a reducer pipe serving as a pipe port sealing member is installed. And a step of inserting a pipe lining material inside the pipe line, a stage of heating and pressurizing to stick the pipe lining material to the inner wall of the pipe line, and a stage of cooling and hardening the pipe lining material to form a pipe lining pipe Connecting a seal flange pipe to the other end of the reducer pipe; and a rubber packing (20) for sealing between the end of the pipe lining pipe and the seal flange pipe, and a tubular protrusion (9 Or a rubber packing (24) for sealing between the end of the pipe lining pipe and the reducer pipe with a stainless inner band (25); Characterized in that it is provided.

  The pipe lining pipe of the first embodiment according to the present invention is a pipe lining pipe that is inserted into a pipe line (1) to be repaired, heated and pressurized, and stuck to the inner wall of the pipe line (1), A fixed flange pipe that is attached to the outside of the pipe line (1) serving as a pipe opening, and is connected to the fixed flange pipe so as to cover the pipe line (1) and the pipe lining pipe that protrudes from the pipe line (1). A fixed flange pipe wound around an outer side of the pipe line (1) of the pipe port portion, and a pipe port sealing member comprising a connection flange pipe provided on the pipe and a seal flange pipe connected to the connection flange pipe And a rubber packing (6a) provided to press the pipe line (1) and the outside of the pipe lining pipe, and between the connection flange pipe and the seal flange pipe, The tube A rubber packing (6) comprising a rubber packing (6b) provided so as to press the inning pipe and an inner flange of the seal flange pipe so as to seal the circumferential portion at the end of the pipe lining pipe And an end packing (8) provided on the front end.

  A support pipe (12) is inserted into the pipe opening of the pipe lining pipe, or the plate thickness of the pipe lining pipe is thicker than the plate thickness in the pipe.

  The pipe lining pipe of the second embodiment according to the present invention is a pipe lining pipe that is inserted into a pipe line (1) to be repaired, heated and pressurized, and stuck to the inner wall of the pipe line (1), A pipe composed of a reducer pipe whose one end is connected to the end of the pipe line (1) by an outer surface band (19) and the other end is enlarged in diameter, and a seal flange pipe connected to the other end of the reducer pipe. To seal between the mouth seal member and the rubber packing (20) provided to seal between the end of the pipe lining pipe and the seal flange pipe, or between the end of the pipe lining pipe and the reducer pipe The rubber packing (24) provided, and the tubular projection (9) of the seal flange tube that presses the rubber packing (20) in the outer peripheral direction or the stainless steel pressing the rubber packing (24) in the outer peripheral direction. A surface band (25), characterized in that it is provided.

According to the pipe lining method according to the present invention (both the first embodiment and the second embodiment), what is a conventional method for sealing a gap between a pipe opening sealing member and a pipe lining material by curing resin on-site? Differently, the rubber packing is pressed against the outer surface of the pipe lining material (first embodiment) or pressed against the inner surface (second embodiment), so there is no on-site resin curing work in either method, and the site such as rain Unaffected by the environment. The pressing is performed by setting the bolts, nuts, tightening torque, and the diameter expansion force of the hydraulic jack, so that little operator skill is required.
According to the pipe lining method of the first embodiment of the present invention, since the support pipe is inserted into the pipe mouth portion of the pipe lining pipe, the buckling pressure resistance of the pipe mouth portion can be increased. It is also possible to increase the buckling pressure resistance of the pipe opening by making the plate thickness of the pipe lining pipe thicker than the thickness in the pipe line.
According to the pipe lining method of the second embodiment of the present invention, since the reduced diameter pipe is used at the pipe opening, the finished inner diameter of the pipe lining material at the pipe end can be increased, and the pipe lining material It is possible to avoid local reduction of the finished inner diameter due to the installation of support pipes, thickening and inner band installation.
According to the pipe lining pipe according to the present invention (both the first embodiment and the second embodiment), the same excellent effects as those of the pipe lining method described above can be obtained.

It is sectional drawing which shows the inside of the lining of the pipe lining material by this invention. It is sectional drawing when the support pipe by this invention is inserted. It is sectional drawing which shows the structure of the pipe opening vicinity by this invention. It is sectional drawing which shows the inside of the lining of the pipe lining material which made thickness thick near the pipe opening by this invention partially. It is sectional drawing which shows the external sealing condition of the pipe lining material which made the thickness near the pipe opening by this invention partially thick. It is sectional drawing which shows the inside of the formwork lining by the reducer pipe | tube by this invention. It is sectional drawing which shows the sealing condition of the formwork by the reducer pipe | tube by this invention. It is sectional drawing which shows the sealing condition by the inner surface band by this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  In the pipe lining material of the present invention, (a) a thermoplastic pipe made of polyethylene or vinyl chloride is deformed, processed into a shape folded in the circumferential direction, and inserted into the pipe by traction, and then thermoplastic. The material used for the pipe rehabilitation method that cools the plastic pipe by pressurizing and heating it while being attached to the inner wall of the pipe, and forms a pipe lining pipe in the pipe, and (b) the plastic film A resin-impregnated tube impregnated with a liquid curable resin in a tubular resin adsorbent covering the surface is inverted and inserted into the pipe, and then the inside of the tube is pressurized and maintained on the wall of the pipe. There are two materials: a material used in a pipe rehabilitation method that heats and cures the curable resin to form a pipe lining pipe in the pipe line. In addition, pipes to be repaired cover water pipes, agricultural water pipes, industrial water pipes, gas pipes and the like.

  As a work procedure, as shown in FIG. 1, a straight pipe-shaped formwork 3 is attached to an end portion of a pipe line 1. Alternatively, as shown in FIG. 6, a reducer pipe 18 is attached to the pipe port of the pipe line 1. The inner diameter of the mold 3 can be substantially the same as the inner diameter dimension of the pipe line 1 or can be substantially the same as the outer diameter dimension of the pipe line 1. For example, the mold 3 may be composed of two molds divided in the axial direction. In FIG. 1, the inner diameter of the mold 3 is set larger than the inner diameter of the pipe line 1 and is set to be substantially the same as the outer diameter dimension of the pipe line 1. As a result, the finished inner diameter of the pipe lining pipe 5 can be increased at the end of the pipe line 1. Thereby, the support pipe 12 is installed on the pipe lining material 2, the thickness of the pipe lining material 2 is increased as shown in FIG. 5, or the inner surface band 25 is installed as shown in FIG. Therefore, local reduction of the finished inner diameter can be avoided.

  As shown in FIG. 1, when the installation of the mold 3 is completed at the end of the pipe line 1, the pipe lining material 2 is inserted into the pipe line 1, the collar 10 is attached to one end of the pipe lining material 2, and tightened Tighten with band 11. Then, hot air, steam or warm water is sent from the air supply pipe to pressurize and heat the thermoplastic pipe lining material 2, and the pipe lining material 2 is softened or hardened so as to stick to the wall surface of the pipe line 1 and the mold 3. As a result, a new pipe lining pipe 5 is formed inside the pipe 1. When the pipe lining pipe 5 which is a plastic pipe is formed in the pipe 1, the pipe 1 is completely repaired.

  When the repair of the pipeline 1 is completed, the next operation to be performed is sealing the end of the pipeline 1. The purpose of sealing the end of the pipe line 1 is softened or hardened by heating the pipe lining material 2 as described above. For this reason, when the work is completed and cooled to room temperature, it shrinks due to the action of heat shrinkage, and a gap is generated between the pipe line 1 and the pipe lining material 2. In order to hermetically seal the gap, the pipe lining material 2 must be connected at the end of the pipe 1 so as to be airtight. That is, even if the pipe line 1 itself can be connected, since the pressure fluid leaks from the gap between the pipe line 1 and the pipe lining material 2, it is necessary to seal and connect the pipe lining material 2.

  As a method of sealing the end portion of the pipe lining material 2, there are methods shown in FIGS. 3, 5, 7, and 8. FIG. 3 and 5 show a method of sealing outside the pipe lining material 2. 7 and 8 show a method of sealing inside the pipe lining material 2. 3 and 5, the rubber packings 6 a and 6 b are respectively arranged outside the pipe line 1 and the pipe lining pipe 5, and the rubber packings 6 a and 6 b are fixed to the fixed flange pipe 13 and the connecting flange pipe 14. In addition, the connecting flange pipe 14 and the seal flange pipe 21 are sandwiched and sealed. Here, the fixed flange tube 13, the connecting flange tube 14, and the seal flange tube 21 are members corresponding to the tube port seal member. These tubes have outer flanges 16 bolted together. A pipe line is further extended to the right end of the seal flange pipe 21 by an extension flange pipe 15. Since a large buckling load acts on the pipe lining material 2, it is necessary to increase the buckling pressure resistance of the seal portion. Therefore, as shown in FIG. 2, a support pipe 12 made of stainless steel is inserted into the pipe lining material 2. As another method, as shown in FIGS. 4 and 5, there is a method of increasing the thickness of the end portion of the pipe lining material 2. As shown in FIG. 4, when the formwork 3 is attached to the end of the pipe line 1, the pipe lining material 2 is inserted into the pipe line 1, the collar 10 is attached to one end of the pipe lining material 2, and the fastening band Tighten with 11. Then, warm water is fed by the water supply hose 7, and the pipe lining material 2 is pressurized and heated to adhere to the entire inner surface of the pipe line 1 and the mold 3 to perform lining.

  As shown in FIG. 2, the end portion of the pipe ringing material 2 is reinforced by the support pipe 12, or the end portion of the pipe lining material 2 is thickened as shown in FIG. The rubber packing 6 is securely brought into close contact with the pipe lining material 2 to maintain a good sealing property. As shown in FIG. 4, the plate thickness t2 is thicker than the plate thickness t1. The support pipe 12 can be used in a pipe rehabilitation method mainly using a thermoplastic plastic as described in the above (a). The method of partially increasing the thickness of the end portion of the pipe lining material 2 is used in a pipe rehabilitation method using a resin-impregnated tube impregnated with a liquid curable resin, as described in (b) above. it can. The support pipe 12 is inserted by setting the temperature of the support pipe 12 to a temperature lower than normal temperature, for example, 0 ° C. to 20 ° C. and heating the pipe lining material 2 to 30 ° C. to 70 ° C. higher than normal temperature. By doing. As the support pipe 12, a stainless steel pipe is usually used.

  The mold 3 is usually a short pipe of iron or stainless steel processed with an inner diameter substantially equal to the outer diameter of the pipe 1. Mainly used is a two-divided pipe (not shown) having a length in the range of 100 to 1000 mm and assembled with bolts and nuts. And a part of one end of the formwork 3 is installed so that it may be inserted in the exterior of the pipe line 1, as shown in FIG. During the lining construction, pressure is applied until the pipe lining material 2 sticks to the inner wall of the mold 3. When the lining is completed, the mold 3 is removed as shown in FIG. The pipe opening 4 is a portion to be sealed at one end of the pipe line 1 and the pipe lining material 2. As shown in FIGS. 3 and 5, a rubber packing 6 and an end packing 8 are installed outside the pipe lining material 2 and sealed. As shown in FIGS. 3 and 5, the end packing 8 is brought into contact with the inner flange 17 of the seal flange pipe 21 to seal the circumferential portion at the end of the pipe lining material 2.

  On the other hand, the method of internal sealing is shown in FIGS. A reducer pipe 18 having one end that is the same as the outer diameter of the pipe line 1 and the other end that is larger than the outer diameter of the pipe line 1 is installed at the end of the pipe line 1. The reducer tube 18 is not removed like the mold 3. Here, the reducer pipe 18 and the seal flange pipe 21 are members corresponding to the pipe opening sealing member. The reducer pipe 18 has a length of 100 to 1000 mm and is usually made of iron or stainless steel. Attachment to the end of the pipe line 1 is carried out by an outer surface band 19 in the examples of FIGS. You may attach not only this but a flange. As shown in FIG. 6, when the reducer pipe 18 and the short pipe form 3 are attached to the end of the pipe 1, the pipe lining material 2 is inserted into the pipe 1, and then hot water is supplied by the water supply hose 7. The pipe lining material 2 is pressurized and heated, and is adhered to the entire inner surface of the pipe line 1, the reducer pipe 18, and the mold 3, thereby performing lining. When the lining is completed, the mold 3 is removed and the pipe lining material 2 is cut near the end of the reducer pipe 18. A seal flange tube 21 is connected to one end of the reducer tube 18 as shown in FIGS. In FIG. 7, the rubber packing 20 is disposed inside the pipe lining material 2 and is pressed in the outer peripheral direction by the tubular protrusion 9 of the seal flange pipe 21. In FIG. 8, the rubber packing 20 is disposed inside the pipe lining material 2 and is pressed in the outer circumferential direction by the inner surface band 25.

  As shown in FIG. 8, the sealing method of the tubular rubber packing 24 arranged inside the pipe lining material 2 is arranged so that the rubber packing 24 is pressed against the inner surface of the pipe lining material 2 and the inner surface of the reducer pipe 18. Then, the diameter is increased in the outer peripheral direction. The inner diameter band 25 (or expanded diameter band) made of stainless steel is used to expand the diameter so as to sandwich the rubber packing 24, and is pressed against the inner surface of the reducer pipe 18 to seal the end. The first inner surface band 25 a is a band that presses the rubber packing 24 against the inner surface of the reducer pipe 18 on the back side. The second inner surface band 25 b is a band that presses the rubber packing 24 against the inner surface of the reducer pipe 18 on the front side. When the installation of the inner surface band 25 is completed, the end seal of the pipe lining material 2 is completely performed, and the pipe rehabilitation becomes a finished product.

  As another means, as shown in FIG. 7, the rubber packing 20 is disposed on the inner surface of the pipe lining material 2 formed on the inner surface of the reducer pipe 18, and the tip of the seal flange pipe 21 is inserted. The end portion is sealed by pressing the rubber packing 20 against the inner surface of the pipe lining material 2. In this case, it is desirable that the sealing portion 26 is performed at the portion of the reducer pipe 18.

  INDUSTRIAL APPLICABILITY The present invention is suitable as a pipe lining method and a pipe lining pipe that can be constructed without being influenced by the weather and can prevent pressure fluid leakage at the pipe opening.

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Pipe lining material 3 Formwork 4 Pipe port part 5 Pipe lining pipe 6 Rubber packing 6a Rubber packing (line side)
6b rubber packing (pipe lining material side)
7 Water supply hose 8 End packing 9 Tubular protrusion 10 Collar 12 Support pipe 13 Fixed flange pipe 14 Connection flange pipe 15 Extension flange pipe 16 Outer flange 17 Inner flange 18 Reducer pipe 19 Outer band 20 Rubber packing 21 Seal flange pipe 24 Rubber packing 25 Inner band 25a First inner band 25b Second inner band 26 Sealing part

Claims (6)

At the end of the pipeline, installing a straight pipe-shaped formwork, one end of which covers the outer circumference of the pipeline and the other end projects from the end of the pipeline;
Inserting a pipe lining material inside the pipe line;
Heating and pressurizing the tube lining material on the inner wall of the pipeline;
Cooling and hardening the pipe lining material to form a pipe lining pipe;
Removing the formwork,
A rubber packing (6) is wound around the outer circumference of the pipe line and the pipe lining pipe, and an end packing (8) covering the circumference of the end of the pipe lining pipe is attached to the outer side of the pipe. A fixed flange pipe to be attached, a connection flange pipe connected to the fixed flange pipe and provided so as to cover the outside of the pipe line and the pipe lining pipe protruding from the pipe line, and a seal flange pipe connected to the connection flange pipe; A pipe lining construction method comprising: attaching a pipe seal member constituted by the above to the pipe mouth portion and pressing and sealing the rubber packing (6) and the end packing (8).
A pipe lining material is prepared in which the support pipe (12) is inserted into the pipe lining pipe, or the thickness of the pipe lining pipe is larger than the thickness of the pipe lining pipe. The pipe lining method according to claim 1, further comprising a step.
One end is connected to the end of the pipe line with an outer surface band (19), the other end is enlarged in diameter, and a reducer pipe serving as a pipe port sealing member is installed
Inserting a pipe lining material inside the pipe line;
Heating and pressurizing the tube lining material on the inner wall of the pipeline;
Cooling and hardening the pipe lining material to form a pipe lining pipe;
Connecting a seal flange tube to the other end of the reducer tube;
The rubber packing (20) for sealing between the end of the pipe lining pipe and the seal flange pipe is pressed by the tubular protrusion (9) of the seal flange pipe, or the end of the pipe lining pipe and the reducer And a step of pressing a rubber packing (24) for sealing between the pipes with an inner band (25) made of stainless steel.
A pipe lining pipe inserted into the pipe (1) to be repaired, heated and pressurized, and stuck to the inner wall of the pipe (1),
A fixed flange pipe that is attached to the outside of the pipe line (1) serving as a pipe opening, and is connected to the fixed flange pipe so as to cover the pipe line (1) and the pipe lining pipe that protrudes from the pipe line (1). A pipe flange sealing member comprising: a connecting flange pipe provided on the sealing flange pipe connected to the connecting flange pipe;
A rubber packing (6a) wound around the outer side of the pipe line (1) of the pipe port portion and provided between the fixed flange pipe and the connecting flange pipe so as to press the pipe line (1) and the pipe lining pipe A rubber packing (6) comprising a rubber packing (6b) provided between the connecting flange pipe and the seal flange pipe and provided to press the pipe lining pipe,
An end packing (8) provided to abut on the inner flange of the seal flange pipe and seal the circumferential portion of the end of the pipe lining pipe.
5. A support pipe (12) is inserted into the tube opening of the tube lining tube, or the plate thickness of the tube lining tube is thicker than the plate thickness in the pipe. Tube lining tube as described in.
A pipe lining pipe inserted into the pipe (1) to be repaired, heated and pressurized, and stuck to the inner wall of the pipe (1),
A pipe composed of a reducer pipe whose one end is connected to the end of the pipe line (1) by an outer surface band (19) and the other end is enlarged in diameter, and a seal flange pipe connected to the other end of the reducer pipe. A mouth seal member;
Rubber packing (20) provided to seal between the end of the pipe lining pipe and the seal flange pipe, or rubber packing (20) provided to seal between the end of the pipe lining pipe and the reducer pipe 24)
A tubular protrusion (9) of the seal flange tube that presses the rubber packing (20) in the outer peripheral direction or a stainless steel inner surface band (25) that presses the rubber packing (24) in the outer peripheral direction. And tube lining tube.

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