JP4247392B2 - Insertion method of pipe lining material in pipe - Google Patents

Description

  The present invention is an improved invention relating to an aging sewer pipe and a method for inserting a pipe lining material into a pipe line.

As a conventional technique, a method of inserting a pipe lining material into a pipeline is disclosed in Patent Document 1, Patent Document 2, Patent Document 3, and the like.

In the “pipeline repair method” described in Patent Document 1, one end of a liner and a rope is connected to a pre-liner end portion before inversion, and the pre-liner is inverted and inserted into an aging pipe by fluid pressure. Pull the liner in the insertion direction of the liner and pull the liner into the inverted pre-liner, then reverse and insert another pre-liner into the liner by fluid pressure. It is characterized in that the functional resin is cured.

The “method and apparatus for laying a new pipe inside an existing pipe” described in Patent Document 2 describes a thermoplastic member having rigidity whose overall cross-sectional dimension is reduced in proportion to the existing pipe. A method of laying a pipe having a new rigidity in the pipe, the step of sufficiently heating the thermoplastic member to change from a normal rigid state to a flexible state; and A process of inserting a member into an existing pipe under a flexible and reduced size, and inflating the thermoplastic member drawn into the pipe in a flexible state. And a step of forming a shape-retaining lead tubular inner pipe having endurance rigidity.

The “pipe lining material reversal method” described in Patent Document 3 is a method for reversing a pipe lining material into a pipe line, in which a sealed bag body that expands in response to supply of compressed gas is arranged in the pipe line in advance. After installation, a part of the lining material is inverted and inserted into the pipeline by fluid pressure, and after the lining material gets over the sealing bag body, a compressed gas is supplied to the sealing bag body to expand it. At the same time, the bar is lowered at the opening of the pipe line, and a part of the pipe lining material is pressed with the bar to deform the pipe lining material into a substantially horizontal S shape, and the pipe lining material is sequentially moved inside the pipe. It is characterized by being inverted.

However, in Patent Document 1, a pipe lining material that is a liner and a guide liner that is a pre-liner are connected to a rope, the guide liner is inverted by fluid pressure, and the tube lining material is inserted into the inverted guide liner. Although the method is disclosed, since the guide liner and the pipe lining material are not in the same pressure acting space, the pipe lining material is squeezed by the insertion guide portion of the portion entering the pressure acting space, and the pressure (space) working space It was difficult to insert the pipe lining material inside.

Patent Document 2 discloses a method of softening a thermoplastic (polyethylene, PVC, etc.) member (referred to as a pipe lining material in the present invention) with heat and drawing it into the pipe. As the pipe lining material is drawn into the pipe, the softened pipe lining material is cooled and caught by protrusions such as misalignment generated in the joints in the pipe line, so that it is very difficult to insert the pipe lining material.

Moreover, in patent document 3 , in order to make water pressure act on the conditions that a pipe line and the position before insertion of a pipe lining material are near, it was necessary to ensure water head pressure (height). For example, if the pipe opening and pipe lining material (before insertion) are distant from each other, a moving lane or the like must be temporarily installed before the pipe lining material is inserted. To secure this, temporary construction such as Yakura was also necessary on the ground.
JP-A-1-242232 JP-A 64-42220 JP-A-6-262684

The problem to be solved by the present invention is, as in Patent Document 1 , a problem that the guide liner and the pipe lining material are not in the same pressure acting space, so that the insertion into the pressure acting space is difficult, As in Patent Document 2 , the softened pipe lining material is cooled and caught on protrusions such as misalignment generated in the joints in the pipe line. Also, as in Patent Document 3 , the pipe line and the pipe lining material Even if the position before insertion is close, there is a need to ensure water head pressure (height), so it is necessary to solve various problems, such as the problem of temporary construction such as Yakura on the ground .

In order to solve the above-mentioned problems, the present invention is configured such that a guide liner 2 having one end communicating with the pressure vessel 5 and the other end sealed is installed in the pipe line 4 via a seal portion 7a so that air does not leak. After the inserted tow rope 3 is connected to the pipe lining material 1 housed in the pressure vessel 5, fluid pressure is applied to the guide liner 2 to expand it into a tubular shape, and the same fluid as in the guide liner 2 Under the pressure acting space S, the pipe lining material 1 is pulled by the pulling rope 3 and pulled into the guide liner 2, so that the pipe lining material is inserted into the pipe line .

  1stly, the insertion method of the pipe lining material in the pipe line which is this invention is a pipe lining in the same pneumatic action space as the fluid pressure which has acted in the guide liner 2 in order to expand the guide liner 2 Since the material 1 is accommodated, the pipe lining material is not squeezed into the guide liner and can be smoothly inserted into the pipe.

  Secondly, the method of inserting the pipe lining material into the pipe line according to the present invention is a method in which a pipe lining material made of thermoplastic resin such as polyethylene or PCV is softened by heat and inserted into the pipe line. By adjusting the temperature of the same pneumatic working space acting in the guide liner and in the storage pressure vessel, the tube lining material once softened during insertion is cooled, and there is no problem of being caught in the displacement of the pipe joint, etc. .

  Third, when both sides of the guide liner are covered with a plastic film and the inside is formed of a tubular nonwoven fabric, a guide liner having a high heat resistance effect can be obtained, which is more effective.

  Fourth, when the pipe lining material is far away from the pipe lining material before insertion, or when the Yakura is temporarily installed on the ground to secure the reverse pressure, the pipe lining material placement position and the pipe lip Install a guide liner in between, apply fluid pressure in the guide liner, draw pipe lining material into it, close one end of the guide liner, attach a reversing nozzle to the other end, fold one end of the pipe lining material When the placement position of the pipe port and the pipe lining material is far by attaching the reverse nozzle, applying fluid pressure in the guide liner, and inserting the pipe lining material into the pipe reversely by the action of fluid pressure Even so, since the guide liner smoothly moves, the pipe lining material can be transported to the pipe port without any problem.

  Fifth, the guide liner is used as a pressure bag, and the arrow lining for securing the hydraulic head pressure is not required for reversing and inserting the pipe lining material into the pipe line.

In the method of inserting a pipe lining material into a pipe line according to the present invention, fluid pressure is applied to the guide liner to expand it into a tubular shape, and is stored in a pressure vessel under the same fluid pressure acting space as in the guide liner. A traction tool connected to one end of the pipe lining material is pulled.

  Below, based on an accompanying drawing, the insertion method of the pipe lining material in the pipe line which is the present invention is explained in detail. FIG. 1 is a longitudinal sectional view showing that the pipe lining material is drawn into a guide liner disposed in the pipe line in the method of inserting the pipe lining material into the pipe line according to the present invention, and FIG. It is AA longitudinal cross-sectional view of the guide liner which has arrange | positioned pipe lining material in a pipe line by the insertion method of pipe lining material in the pipe line which is.

  The pipe lining material used in the present invention includes a pipe lining material 1 shown in FIGS. 1 to 8 in which a tubular resin absorbent material is impregnated with a curable resin and an outer surface is airtightly covered with a plastic film, and a tubular heat There are two types of pipe lining material 1a shown in FIGS. 9 to 12 in which the plastic resin is deformed to be compact (peripheral direction).

  After the pipe lining material 1 is inserted into the pipe line 4 to be repaired, air pressure is supplied to the pipe lining material 1 to expand the pipe lining material 1 into a tubular shape. In this mechanism, a heating medium such as steam is supplied to cure the curable resin impregnated in the tube lining material 1.

  As shown in FIG. 1, when the pipe lining material 1 is drawn into the guide liner 2, the guide liner 2 is disposed in a predetermined place in advance as in the pipe 4, and the pipe lining material 1 is drawn into the inside thereof. .

Inside the guide liner 2, a tow rope 3 wound around a winch 3a is provided in advance. Then, at the right end portion of the traction rope 3 on the pressure vessel 5 side, the connector 11a and the pipe lining material 1 are connected, the pipe lining material 1 is accommodated in the pressure vessel 5, and the pressure vessel 5 and the guide liner 2 are accommodated. Air pressure is applied inside, the winch 3a is driven, the tow rope 3 is pulled through the seal portion 7a, and the pipe lining material 1 is pulled into the guide liner 2.

As shown in FIG. 1, the pipe lining material 1 is folded and accommodated in a pressure vessel 5 having a substantially square shape or a circular pipe, and is cooled in order to suppress the curing reaction of the curable resin as necessary. The coolant used when cooling the pipe lining material 1 is water, ice, ice water, gas, or the like.

  As shown in the AA longitudinal cross-sectional views of FIGS. 1 and 2, the guide liner 2 has a tubular body formed by sewing woven or non-woven fabric, and the outer surface of the tubular body is covered with a plastic film 2a so that air pressure is applied. Thus, a plastic film 2a is provided on the inner surface.

  The tubular body and the plastic film 2a are firmly coated by heat or welding. As another method, the plastic film 2a may be inserted and arranged inside the tubular body.

  The plastic film used for the guide liner 2 is a composite film containing polyethylene, polypropylene, polyurethane, PVC, and nylon. The woven fabric and the non-woven fabric use polyester or nylon fibers. Next, in order to expand the guide liner 2, the pipe lining material 1 is accommodated in the same air pressure acting space as the fluid pressure acting in the guide liner 2, and the guide liner 2 and the pipe lining material 1 are the same. The pressure vessel 5 capable of adjusting the temperature in the pneumatic working space constituting the fluid pressure working space S will be described in detail.

  The pressure vessel 5 includes a thermometer 5a, a pressure gauge 5b, a compressor 5c, a valve 5d, and an exhaust valve 5e on the surface, and a roller 5f for feeding the pipe lining material 1 to the inside of the pressure vessel 5.

As shown in FIG. 1, a start side guide pipe 6 bent in an L shape with respect to the underground direction is connected to the end of the pressure vessel 5, and the other end of the guide liner 2 passed through the inside of the pipe 4. Is connected to the arrival side guide pipe 7 bent with respect to the ground direction.

  In addition, a U-shaped seal portion 7a is attached to the tip of the arrival side guide pipe 7, and the traction rope 3 extending from the pipe lining material end end 11 is inserted into the seal portion 7a. It is a mechanism wound up by 3a.

  The inside of the pressure vessel 5 becomes a storage container for the guide liner 2 and the pipe lining material 1 and is heated between 50 ° C. and 100 ° C. When the pipe lining material 1 is sufficiently softened, the pulling rope 3 is pulled to obtain the pipe lining material. 1 is inserted into the guide liner 2 installed in the pipe 4.

  That is, an air pressure that is a fluid pressure is applied to the guide liner 2 in the pipe line 4 to expand it into a tubular shape, and the same fluid pressure as that in the guide liner 2 under the same fluid pressure acting space S as in the guide liner 2. The pipe lining material 1 with the traction rope 3 stored in advance in the pressure vessel 5 outside the pipe line 4 in the space is disposed, and the pipe lining material 1 is drawn into the guide liner 2 at a position in the pipe line 4. The pipe lining material is inserted into the pipe line by pulling with a towing tool such as a winch 3a outside the pipe line 4 connected to the pipe.

  In addition, when the fluid pressure applied to the guide liner 2 is increased, the reversing force is increased, and the pipe lining material 1 can be drawn into the guide liner 2 without requiring a traction tool. The fluid pressure working space S is a space in which air pressure or the like is uniformly applied from the inside of the pressure vessel 5 to the starting side guide pipe 6, the guide liner 2, and the reaching side guide pipe 7.

When the pulling rope 3 is used and the pipe lining material 1 is drawn into the guide liner 2, the internal air pressure is set to 0.01 mpa to 0.05 mpa . When the pipe lining material 1 is drawn into the guide liner 2 only by the reversing force of the guide liner 2, an air pressure of 0.03 mpa to 0.2 mpa is applied. Further, when the reversing force and traction force are used in combination, the air pressure sent from the pressure vessel 5 may be 0.01 mpa to 0.15 mpa, and the air pressure can be minimized.

  The diameter of the guide liner 2 is set to be smaller than the diameter of the pipe lining material 1. Specifically, the diameter of the guide liner 2 can be reduced from the diameter of the pipe lining material 1 by a reduction ratio between 30% and 99%. The reduction ratio is not limited, and the ratio can be freely changed according to the thickness of the lining material 1 to be used. The fluid supplied into the guide liner 2 uses air or / and water.

  In the present invention, the guide liner 2 and the pipe lining material 1 are connected, both are accommodated in a pressure sealed space serving as the same fluid pressure acting space, air pressure is applied to the pressure sealed space, and the guide liner 2 It is only necessary that the pipe lining material 1 can be drawn into the guide liner 2 while reversing.

  FIG. 3 is a situation diagram in which the pipe lining material is pulled into the guide liner while the guide liner is inverted and inserted into the pipe line in the method for inserting the pipe lining material into the pipe line according to the present invention. As shown in FIG. 3, a part of the guide liner 2 is reversely inserted into the pipe 4, the guide liner 2 and the pipe lining material 1 are connected while the guide liner 2 is reversed, and the guide liner 2 is drawn into the guide liner 2. It shows how to insert.

In addition, in order to insert the pipe lining material 1 faster and smoothly into the guide liner 2, a winch 3a can be used. Next, in FIG. 4 to FIG. 6, the details will be described according to the construction state diagram in the case where the pipe opening 4 a that is the inlet of the pipe line 4 and the pipe lining material 1 arrangement position are far apart.

  FIG. 4 is a diagram showing a situation in which the pipe lining material is drawn into the guide liner arranged up to the pipe port in the method for inserting the pipe lining material into the pipe line according to the present invention, and FIG. 5 is a pipe according to the present invention. FIG. 6 is a view showing a state in which one end of the pipe lining material is folded and attached to the reversing nozzle in the method of inserting the pipe lining material into the passage. FIG. 6 is a diagram illustrating the method of inserting the pipe lining material into the pipe according to the present invention. It is a situation figure where reversal of material was completed.

  As shown in FIG. 4, first, the guide liner 2 is attached to the reversing nozzle 5g at the tip of the pressure vessel 5, the seal portion 7a is provided at the other end of the guide liner 2, and the pipe lining material 1 is provided inside the pressure vessel 5. Set. Air is sent into the guide liner 2 to form the same pneumatic working space. Then, the tow rope 3 connected to one end of the pipe lining material 1 is pulled by the winch 3a in the direction of the seal portion 7a where the pipe line 4 is located.

  As shown in FIG. 5, the guide liner 2 is provided with a pipe lining material 1, a hot water hose 8, and a hot water hose stop rope 8 a at the end of the pipe lining material 1 that is not open like a petal. Are attached in the order of the hot water hose 8 and the hot water hose stop rope 8a.

  The end portion of the guide liner 2 is closed by the rear closing cup 9, and the other end of the hot water hose stop rope 8 a at the end portion of the guide liner 2 goes out from the guide liner 2. The pipe lining material 1 coming out from the seal portion 7a spreads in a petal shape with respect to the direction of the pipe opening 4a of the pipe line 4 by the air from the compressor 5c.

  Then, as shown in FIG. 6, the pipe lining material 1 can be reversed and advanced from the tip of the guide liner 2 in the form of a petal, and the lining material reverse insertion into the pipe line 4 can be completed. The tip of the pipe lining material 1 is tightened with a bolt and nut 12.

  That is, after drawing the pipe lining material 1 into the guide liner 2, one end of the guide liner 2 is closed by the rear closing cup 9, and the reverse nozzle 5 g is attached to the other end, and the pipe lining material 1 is attached to the reverse nozzle 5 g. One end is attached in a folded manner, and a fluid pressure of air or water is applied to the inside of the guide liner 2 so that the pipe lining material 1 is inverted and inserted into the pipe line 4. Next, the connection between the pipe lining material 1 inside the pressure vessel 5 and the guide liner 2 will be described in detail with reference to FIGS.

  FIG. 7 is a state diagram of inserting the pipe lining material into the pipe line according to the present invention by inverting the guide liner toward the pipe port and drawing the pipe lining material into the guide liner. It is an enlarged view of the connection part A by the insertion method of the pipe lining material in the pipe line which is this invention.

As shown in FIG. 7, when the guide liner 2 is reversed, the pipe lining material 1 is inside the pressure vessel 5. And in A which is a connection part of the guide liner 2 and the pipe lining material 1 as shown in FIG. 8, the tow rope 3 is inserted into the guide liner 2 and the inserted tow rope 3 is used as the pipe lining material 1. It connects with what was tightened with the bolt nut 12 so that it may pinch | pinch from the outside at the edge part .

  In addition, as shown in FIG. 8, in order to connect with the end of the pulling rope 3 extended from the said guide liner 2, the substantially U-shaped pipe lining material end end 11 is provided in the edge part of the pipe lining material 1, and bolt Tighten it with the nut 12.

  Therefore, even when the arrangement position of the pipe lining material 1 before insertion and the pipe lining material 1 before insertion is far, or when an arrow is temporarily installed on the ground to secure the reverse pressure, the fluid pressure is applied to the guide liner 2. Since the pipe lining material 1 can be reversed and inserted into the pipe line 4 by the action of fluid pressure, the guide liner 2 can be inserted even when the pipe port 4a of the pipe line 4 and the pipe lining material 1 are distant from each other. Therefore, the pipe lining material 1 can be carried to the pipe opening 4a of the pipe line 4 without any problem. The guide liner 2 is composed of a plastic film 2 a and a nonwoven fabric 2 b, and the opening from which the tow rope 3 is led is tightened by a fastener 10.

  Next, a method for inserting the pipe lining material into the pipe line using the pipe lining material 1a according to the second embodiment of the present invention instead of the pipe lining material 1 will be described in detail.

  FIG. 9 is a second embodiment of the method for inserting a pipe lining material into a pipe line according to the present invention, and is a perspective view in which the pipe lining material is compactly deformed, and FIG. 10 is a drawing into the pipe line according to the present invention. FIG. 11 is a situation diagram showing the construction status of the pipe lining material in the second embodiment of the method for inserting the pipe lining material, FIG. 11 is a second embodiment of the method for inserting the pipe lining material into the pipe line according to the present invention. It is the front view which closed the pipe lining material with the fastener.

  As shown in FIG. 9, when the pipe lining material 1a used in the present invention is drawn into the pipe line, the cooled pipe lining material is caught by a protrusion such as a deviation generated at a joint or the like in the pipe line. In order to prevent this, the pipe lining material 1a is folded in a substantially C-shape.

  The pipe lining material 1a is formed by extruding a thermoplastic resin such as polyethylene or PVC (polyvinyl chloride) into a tubular shape, deforming it into a compact shape (circumferential direction), and a winder (not shown) in a pressure vessel (not shown). 3)

  As shown in FIGS. 10 and 11, both ends of the pipe lining material 1 a are folded flat so that the longitudinal section is substantially C-shaped, and are closed by a fastening tool 16 provided on the bolt nut 15. And the drain hose 14 is attached to the left end part which is one end of the pipe lining material 1a from the steam hose supply port 13 and the drain hose inlet / outlet 14a.

  A steam hose exhaust port 13a and a drain hose pulling port 14c are provided at the right end, which is the other end of the pipe lining material 1a, and the drain hose 14 is moved from the drain hose pulling port 14c by a drain hose pulling rope 14b. is there.

  That is, when the pipe lining material 1 a is inserted into the pipe line 4, steam as steam is supplied into the pipe lining material 1 from the ground. The temperature of the steam is adjusted from 100 ° C. to 130 ° C., and the condensed steam water accumulated in the pipe lining material 1 a is removed by moving the drain hose 14.

  Then, the pipe lining material 1a is again expanded into a tubular shape by steam pressure and heat. When fully expanded, the pipe lining material 1a is cured by cooling the inside, and the lining construction is completed.

  FIG. 12 shows a second embodiment of the method for inserting a pipe lining material into a pipe line according to the present invention, in which water 17 is stored in the lower part of the inner pipe of the guide liner 2 and the pipe lining material 1a is reversed while the guide liner 2 is reversed. It is the condition figure which floats and draws in the water 17 in the guide liner 2. FIG.

  As shown in FIG. 12, when the pipe lining material 1 having a large diameter and a thick plate lining material 1 a is inserted into the pipe line 4, water 17 is accumulated at the bottom of the pipe inside the guide liner 2 and pulled. By floating the pipe lining material 1a and the non-inverted guide liner 2c connected by the rope 3, it is possible to solve the problem of catching of protrusions caused by traction force or a shift generated in a joint portion in the pipe 4 that has been generated conventionally. The burden related to the insertion of the pipe lining material 1a can be remarkably reduced.

It is a longitudinal cross-sectional view which shows having pulled the pipe lining material in the guide liner arrange | positioned in the pipe line by the insertion method of the pipe lining material in the pipe line which is this invention. It is AA longitudinal cross-sectional view of the guide liner which has arrange | positioned the pipe lining material in the pipe line by the insertion method of the pipe lining material in the pipe line which is this invention. FIG. 5 is a situation diagram in which the pipe lining material is drawn into the guide liner while the guide liner is inverted and inserted into the pipe line in the method for inserting the pipe lining material into the pipe line according to the present invention. It is a situation figure which draws in a pipe lining material in a guide liner arranged to a pipe line mouth by a method for inserting pipe lining material into a pipe line which is the present invention. FIG. 5 is a situation diagram in which one end of the pipe lining material is folded and attached to the reversing nozzle by the method for inserting the pipe lining material into the pipe line according to the present invention. It is the situation figure which the inversion of the pipe lining material was completed by the insertion method of the pipe lining material in the pipe line which is the present invention. It is a situation figure which reverses a guide liner toward a pipe line mouth and draws a pipe lining material into the guide liner by a method for inserting a pipe lining material into a pipe line according to the present invention. It is an enlarged view of the connection part A by the insertion method of the pipe lining material in the pipe line which is this invention. It is the perspective view which deform | transformed the pipe lining material compactly in 2nd Example of the insertion method of the pipe lining material in the pipe line which is this invention. It is the situation figure which showed the construction condition of the pipe lining material in 2nd Example of the insertion method of the pipe lining material in the pipe line which is this invention. It is the front view which closed the pipe lining material with the fastener in 2nd Example of the insertion method of the pipe lining material in the pipe line which is this invention. In the second embodiment of the method of inserting the pipe lining material into the pipe line according to the present invention, water is accumulated in the lower part of the pipe in the guide liner, and the pipe lining material is floated and drawn in the guide liner while reversing the guide liner. It is a situation diagram.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe lining material 1a Pipe lining material 2 Guide liner 2a Plastic film 2b Non-woven fabric 2c Unreversed guide liner 3 Pulling rope 3a Winch 4 Pipe line 4a Pipe port 5 Pressure vessel 5a Thermometer 5b Pressure gauge 5c Compressor 5d Valve 5e Exhaust valve 5f Roller 5g Reverse nozzle 6 Starting side guide pipe 7 Reaching side guide pipe 7a Sealing part 8 Hot water hose 8a Hot water hose stop rope 9 Rear closing cup 10 Fastening tool 11 Pipe lining material end end 11a Connector 12 Bolt nut 13 Steam hose supply port 13a Steam hose exhaust port 14 Drain hose 14a Drain hose inlet / outlet 14b Drain hose traction rope 14c Drain hose traction port 15 Bolt nut 16 Fastener 17 Water S Fluid pressure working space

Claims (5)

  A guide liner with one end communicating with the pressure vessel and the other end sealed is installed in the pipe line, and a tow rope inserted through the seal portion so that air does not leak is attached to the pipe lining material stored in the pressure vessel. After being connected, fluid pressure is applied to the guide liner to expand it into a tubular shape. Under the same fluid pressure acting space as in the guide liner, the pipe lining material is pulled with a tow rope and pulled into the guide liner. A method for inserting a pipe lining material into a pipe line characterized by the above.   The method for inserting a pipe lining material into a pipe line according to claim 1, wherein the inside of the pressure vessel is heated to soften the pipe lining material, and then the pulling rope is pulled.   After drawing the pipe lining material inside the guide liner, close one end of the guide liner and attach the reversing nozzle to the other end, fold one end of the pipe lining material to the reversing nozzle, and then install air or water inside the guide liner. The method of inserting a pipe lining material into a pipe line according to claim 1 or 2, wherein the pipe lining material is inverted and inserted into the pipe line by applying a fluid pressure of. The diameter of the guide liners, methods for inserting the pipe liner bag to claims 1 to according to any one of the three conduit and sets smaller than the diameter of the pipe-lining material. The pipe lining material is folded into a C-shape and deformed into a compact shape , so that the cooled pipe lining material is prevented from being caught by the displacement generated in the joint in the pipe line. method of inserting the pipe lining material to the description of the conduit to any one of claims 1 to 4.

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