JP3764027B2 - Pipe lining material reversing device and pipe lining material reversal method using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for inserting a pipe lining material into a pipe line so that the inner circumferential surface of the pipe line is lined with a pipe lining material, and in particular, for smoothly inverting a pipe lining material for small and medium-diameter pipes. Relates to the apparatus and method.
[0002]
[Prior art]
When sewer pipes and other pipes buried in the ground are aged, a method of repairing by forming a hard coating on the inner peripheral surface without digging out those pipes is already known and put into practical use .
[0003]
This type of pipe lining method uses a pipe lining material made by impregnating a thermosetting resin into a resin absorbent material such as a non-woven fabric whose surface is coated with a film, and the pipe lining material is piped with a fluid pressure such as water or air. The thermosetting resin impregnated in the pipe lining material is cured by, for example, replacing the fluid with warm water while pressing it against the inner peripheral surface of the pipe line with fluid pressure. Then, a hard coating is formed by a pipe lining material on the inner peripheral surface of the pipe.
[0004]
Here, in this type of pipe lining method, a base (reversing nozzle) that connects one end of the pipe lining material is used for reversing the pipe lining material, but when the base is installed inside or outside the manhole. There is.
[0005]
FIG. 12 shows an example in which a base is installed in a manhole . In this case, for example, a bend B (bent pipe, elbow) bent into an L shape is used as the base. As shown in the figure, one end of a pipe lining material L is attached to the outer periphery of one end of the bend B by folding it outward, and an extension tube T is connected to the other end. Then, for example, water is injected as a fluid into the extension tube T drawn from the manhole M to the ground in a state where the connection side of the pipe lining material L is repaired, and the pipe lining material L is caused by the water pressure. Is introduced into the pipe line K1.
[0006]
According to this type of construction method, the length of the pipe line for repairing the pipe lining material can be used without waste, but when the pipe diameter becomes larger, the base applied to this is used. Since (Bend B) cannot be introduced into the manhole, pipe repair by this method is limited to small and medium diameter.
[0007]
Therefore, when repairing a pipe having a large diameter (for example, a manhole having an inlet diameter of 600 mm and a diameter of 400 mm or more), a method as shown in FIG. 13 is applied. In the figure, N is a cylindrical base, and this base N is supported by a gantry (not shown) provided on a manhole M. As shown in the figure, one end of the pipe lining material L is folded and connected to one end opening edge of the base N, and the pipe lining material L is inverted by pouring water into the base N in this state. It can be introduced into the conduit K2 through the manhole M.
[0008]
[Problems to be solved by the invention]
However, according to the construction method applied to the repair of large-diameter pipes as described above, after the pipe lining material is hardened, the pipe lining material extending from the ground base to the inlet of the pipe is cut off, resulting in a lot of wasted material. appear. For this reason, in the repair of small and medium-diameter pipes, the base is installed in the manhole and the pipe lining material is inverted and inserted into the pipe as described above. In this case, the lining material is smoothly inserted into the pipe. Therefore, when water is used as the fluid for reversal, the extension tube is lengthened to obtain the required water head pressure, and the upper end is supported at a high position. Yes. However, this requires construction of a high platform on the manhole, which requires a lot of work to be done at high altitude and is dangerous.
[0009]
Therefore, air may be used together as the fluid for reversal or only air may be used, but in order to smoothly reverse the pipe lining material, a large amount of high-pressure compressed air must be generated using a large compressor. .
[0010]
In addition, after the reverse insertion of the pipe lining material into the pipe line, the pipe lining material is hardened while being in close contact with the inner peripheral surface of the pipe line by its internal pressure, but if the internal pressure is insufficient, the pipe lining material will be It does not adhere to the inner peripheral surface, and as a result, a high-quality lining cannot be formed.
[0011]
The present invention has been made in view of the circumstances as described above, and its object is to allow smooth and well-inverting inserted into conduit in small, tubular liner for medium diameter pipe.
[0012]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is a pipe lining material reversing device used for reversing and inserting a pipe lining material into a pipe line, and a bend-shaped base having different diameters at one end and the other end. A tubular joint corresponding to the large-diameter portion, and the large-diameter portion of the base and the joint are detachably coupled by a tightening force between a latch and a hook-shaped protrusion corresponding to the latch, and A flexible extension tube is connected to the joint, and one end of the pipe lining material is attached to the outer periphery of one end on the small diameter side of the base by folding back outward .
[0013]
In particular, preferably one small diameter portion of the base is set to the diameter of 100 mm to 400 mm, the other end large-diameter portion is set to diameter of 300 mm to 600 mm.
[0014]
In addition, using the pipe lining material reversal device as described above, the pipe lining material impregnated with thermosetting resin is passed through the extension tube and the base, and one end of the pipe lining material is folded outward and the outer periphery of the small diameter portion of the base And connecting the extension tube to the large-diameter portion of the base via the joint, and then introducing the base into the manhole and directing the small-diameter portion toward the inlet of the pipeline, and starting up on the ground in that state extension tube and liquids supplied from the large-diameter portion in the interior of the mouthpiece through which is to provide a method of inversion of the tube lining, characterized in that inverted insertion toward the pipe lining material into conduit by the hydraulic .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, application examples of the present invention will be described in detail with reference to the drawings. First, in FIG. 1, 1 is a manhole, 2 is a pipe such as a sewer connected to the bottom of the manhole 1, 3 is a pipe lining material for lining (lining) the pipe 2, and this pipe lining material 3 is As is well known, a tubular resin absorbent material formed of a nonwoven fabric such as polyester or the like is used as a support, and this is impregnated with a thermosetting resin such as an epoxy resin or an unsaturated polyester, and its outer peripheral surface or both inner and outer peripheral surfaces are covered. Coated with a plastic film such as polyethylene or polyurethane.
[0016]
The pipe lining material 3 is folded in a band shape before use and is kept cold, and is inserted while being inverted inside the pipe line 2 by fluid pressure as will be described later. In addition, the longitudinal direction one end is open | released as a connection part, and the other end is closed so that the fluid may not leak.
[0017]
On the other hand, 4 is a bend-shaped base for connecting one end on the open side of the pipe lining material 3, the pipe lining material 3 is connected to one end opening of the base 4, and a tubular joint is connected to the other end opening. A flexible extension tube 6 having a tubular shape made of a nonwoven fabric having a film coated on the peripheral surface is connected via 5 (connection tube). A cylindrical metal fitting 7 having a flange on the outer periphery is attached to one end on the upper side of the extension tube 6, and the pipe lining material 3 is drawn out from the portion of the metal fitting 7 attached to the one end through the extension tube 6. A hot water hose 8 is connected to the end of the pipe lining material 3 in advance by a string or the like.
[0018]
Here, the base 4 is a hard bend in which a metal is formed in an L-shaped tube as shown in FIG. 2, for example, and the diameters at both ends thereof are different, and the diameter d of the small diameter portion 4A is the pipe 2 to be repaired. Corresponding to the diameter, for example, it is set to 100 mm to 400 mm, and the large diameter portion 4B is set to a larger diameter D (for example, 300 mm to 600 mm). And the coupling | bond part 9 (saddle-shaped protrusion ) for coupling | bonding with the coupling 5 is provided in the outer periphery of the large diameter part 4B. In particular, there are a plurality of types of bases 4 corresponding to the pipes 2 having various diameters, and only the diameters of the small diameter parts 4A are different, and the large diameter parts 4B of the bases 4 are unified to a constant diameter. The For example, a large number of bases having a diameter D of the large diameter part 4B of 350 mm and a diameter d of the small diameter part 4A of 100, 120, 150, 200, 250, 300 mm, etc. are prepared. Similarly, when the diameter D of the large-diameter portion 4B is 500 mm, a large number of bases in which the diameter d of the small-diameter portion 4A changes in the range of, for example, 100 to 450 mm are prepared. However, the diameters d and D are not limited to the above numerical values.
[0019]
In order to enable the introduction of the base 4 into the manhole 1, the diameter D of the large diameter portion 4B is preferably about the same as or smaller than the diameter of the entrance of the manhole 1 (generally 600 mm) The total length L of the base 4 is set to be smaller than the inner diameter of the manhole 1 (generally 900 mm). Here, even when the diameter D of the large-diameter portion 4B is equal to the inlet diameter of the manhole 1, the whole manhole can be obtained by inclining the base 4 and introducing the manhole 1 first from the small-diameter portion 4A side as shown in FIG. 1 can be introduced.
[0020]
And according to the nozzle | cap | die 4 comprised as mentioned above, as shown in FIG. 4, the end of the pipe lining material 3 is connected to the small diameter part 4A, and the large diameter part 4B is connected via the cylindrical coupling 5 to it. One end of the extension tube 6 is connected. Here, the joint 5 is a hard tube made of metal or the like, the diameter of the joint 5 corresponds to the large diameter portion 4B of the base 4, and the outer periphery of the joint 5 is a ring-shaped flange 10 that covers the opening edge of the large diameter portion 4B of the base 4. And a coupling portion 11 (a buckle having a U-shaped latch 11A) corresponding to the coupling portion 9 of the base 4 is provided. A ring-shaped sealing material 12 (gasket) is interposed between the flange 10 and the base 4. And the large diameter part 4B of the nozzle | cap | die 4 fits into the end of this coupling 5, and both are firmly couple | bonded by the tightening force by the coupling parts 9 and 11. The base 4 has a small diameter portion 4A having a diameter suitable for the pipe lining material 3. After passing through one end of the pipe lining material 3 on the open side, the one end is folded outward, and the folded portion 3A. Is fastened to the outer periphery of the small-diameter portion 4A of the base 4 with a band 13. The extension tube 6 is adapted to the diameter of the joint 5 and one end thereof is fastened to the outer periphery of the joint 5 with a band 14.
[0021]
Here, in order to reversely insert the pipe lining material 3 into the pipe line 2 using such a base 4, first, as described above, the pipe lining material 3 is passed through the base 4, and one end on the open side is outside. And the extension tube 6 is connected to the large-diameter portion 4B of the base via the joint 5 while being attached to the outer periphery of the small-diameter portion 4A of the base. A hot water hose 8 is connected to one end (terminal) of the tube lining material 3 on the sealing side. Then, as shown in FIG. 1, the base 4 is lowered from the ground to the bottom of the manhole 1, and the small diameter part 4 </ b> A to which one end of the pipe lining material 3 is attached is directed to the inlet of the pipe 2, while the large diameter of the base is An extension tube 6 connected to the portion 4B via a joint 5 is raised from the manhole 1 to the ground, and a cylindrical metal fitting 7 attached to one end on the upper side thereof is horizontally supported by a frame portion (not shown). In this state, water is poured into the extension tube 6 from the ground, and is supplied from the large diameter portion 4 </ b> B to the inside of the base 4 through the extension tube 6.
[0022]
Then, as shown in FIG. 5, the pipe lining material 3 is inserted into the pipe line 2 while being inverted by receiving the water pressure, and the hot water hose 8 connected to the end of the pipe lining material 3 is also inside the pipe lining material 3. It is drawn into the pipeline 2 while scolding. In particular, the pipe lining material 3 receives a very large pressure from the large-diameter portion 4B side by a large amount of water supplied into the extension tube 6, so that the reversal of the pipe lining material 3 is smoothly inserted into the pipe line 2 without delay. When the reversal is completed, the hot water hose 8 passes from the ground to the reversal end of the pipe lining material 3.
[0023]
The pipe lining material 3 is firmly adhered to the inner peripheral surface of the pipe line 2 while receiving a large water pressure from the large-diameter portion 4B side of the base, but preferably the internal pressure of the pipe lining material 3 using air pressure is also used. Will be further increased. Specifically, as shown in FIG. 5, a pressure lid 15 through which the hot water hose 8 passes is attached to the upper surface opening of the metal fitting 7 to form a sealed space S on the water surface of the extension tube 6, and the sealed space S Compressed air is supplied from the compressor C through the pressure lid 15, whereby the pipe lining material 3 is strongly pressed against the inner peripheral surface of the pipe line 2 by water pressure and air pressure.
[0024]
Therefore, warm water is supplied to the inside of the lining material 3 through the hot water hose 8 while maintaining this state. At this time, the pressure of the hot water flowing out from the tip of the hot water hose 8 and the water filling the pipe lining material 3 are filled. The water stored in the lining material 3 is sent to the boiler B through the drain pipe 16 due to the pressure with the air in the sealed space S, heated by the boiler B, and the hot water obtained thereby is supplied from the pump P to the hot water hose 8. Through the pipe lining material 3 . The lining material 3 is heated by the circulating hot water, and the thermosetting resin impregnated therein is cured, so that a hard coating is formed by the lining material 3 on the inner peripheral surface of the pipe line 2.
[0025]
As shown in FIG. 6, the hot water hose 8 has a hard tube 8A made of metal, heat-resistant plastic or the like in the portion that penetrates the pressure lid 15, and the pressure lid 15 has a cylindrical shape in the portion that penetrates the hard tube 8A. Packing 17 is provided. The packing 17 is a so-called omni seal made by Huron in the United States, which is a metal spring 17B made of a coil spring or a U-shaped leaf spring in a cover 17A formed of an elastic body such as rubber or resin. Is built in. And according to this packing 17, the inner peripheral surface closely_contact | adheres to the outer peripheral surface of hard tube | pipe 8A, the airtightness of sealed space S can be maintained, and the hard tube | pipe 8A is the axis | shaft with the packing 17 supporting it. Can be slid in the direction.
[0026]
On the other hand, according to the reversing device composed of the base 4 and the joint 5 as described above, not only can a large fluid pressure (hydraulic pressure) be generated in the pipe lining material 3 to smoothly reverse it, The base 4 can be easily exchanged according to the diameter of the pipeline 2 to be repaired, and the joint 5, the extension tube 6, the metal fitting 7 and the pressure lid 15 are common parts regardless of the diameter of the pipeline 2 to be repaired. It can be used repeatedly while connected.
[0027]
Having described the preferred example of the present invention, the structure of the ferrule, as shown in FIG. 7, it may be formed drain outlet 23 to the site. A drain pipe 16 for circulating hot water shown in FIG. 5 is connected to the drain port 23 of the base 41 through the outside of the base 41.
[0028]
On the other hand, as a form of the base, a base 42 as shown in FIG. 8 may be used. The base 42 is composed of a bottomed cylindrical main pipe 42A having one end closed and a communication pipe 42B connected to the outer wall at a right angle, and the mutual connection portion is fixed by welding or the like. . The main pipe 42A is made of a pipe having a larger diameter than the communication pipe 42B, and an opening at one end thereof is a large diameter part 4B for connecting the extension tube 6. The communication pipe 42B is made of a pipe having a smaller diameter than the main pipe 42A, and an opening at one end thereof is a small diameter part 4A for attaching one end of the pipe lining material 3. The base 42 also generates a high pressure from a large amount of fluid (mainly liquid such as water) from the large diameter portion 4B side to the small diameter portion 4A side, and the pipe lining material 3 connected to the small diameter portion 4A is smoothed by the pressure. Even after the pipe lining material 3 is reversed, the inner pressure can be kept high and can be brought into close contact with the inner peripheral surface of the pipe line 2. In this example, the extension tube 6 is connected to the large diameter portion 4B of the base 42 via the joint 5 as in the above example .
[0029]
Further , as shown in FIG. 9 , a base 43 integrally formed in a bend shape by a die-cast method or the like can be used. In this example as well, one end of the pipe lining material 3 is attached to the small diameter portion 4A of the base 43, and the extension tube 6 is connected to the large diameter portion 4B via the joint 5 as in the above example .
[0030]
【The invention's effect】
As apparent from the above description, according to the present invention, a pipe lining material is used by supplying a liquid from the large diameter side to the inside of the base using a base having a larger diameter at the other end than one end to which the pipe lining material is attached. can so that reversing et al., by the action of atmospheric kina fluid pressure to the pipe lining material, which can be smoothly reversed inserted conduit, yet the height of the liquid level as in the prior art Sufficient pressure can be obtained to reverse the pipe lining material without increasing the size, so that a series of operations can be performed efficiently in a low place.
[0031]
In addition, since the inner pressure of the pipe lining material can be kept high even after reverse insertion of the pipe lining material into the pipe line, the pipe lining material is cured while closely contacting the inner peripheral surface of the pipe line to form a good lining. can do.
[0032]
Furthermore, since the extension tube is connected to the large diameter part of the base through a tubular joint, only the base is made compatible while the joint and the extension tube are connected corresponding to the diameter of the pipe to be repaired. In addition, the joint and the extension tube can be repeatedly used while being connected as a common part regardless of the pipe diameter.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an example of pipe lining construction. FIG. 2 is a perspective view showing a base used for reversing pipe lining material. FIG. 3 is a schematic view showing an example of introducing the base into a manhole. FIG. 4 is a cross-sectional view showing a state in which a pipe lining material is connected to the base. FIG. 5 is a schematic cross-sectional view showing a state in which the pipe lining material is inverted and inserted into the pipe using the base. FIG. 7 is an enlarged cross-sectional view showing a part of a system for supplying hot water to be hardened. FIG. 7 is a cross-sectional view showing another embodiment of the base. FIG. 8 is a cross-sectional view showing another embodiment of the base. FIG. 10 is a schematic view showing a conventional method for reversing a pipe lining material . FIG . 11 is a schematic diagram showing a conventional method for reversing a pipe lining material.
DESCRIPTION OF SYMBOLS 1 Manhole 2 Pipe line 3 Pipe lining material 4, 41, 42, 43 Base 4A Small diameter part 4B Large diameter part 5 Joint 6 Extension tube 7 Metal fitting 8 Hot water hose 9 Joint part (saddle-shaped protrusion)
11A hasp

Claims (3)

A pipe lining material reversing device used for reversing and inserting a pipe lining material into a pipe line, a bend-shaped base having different diameters at one end and the other end, and a tubular joint corresponding to the large-diameter portion of the base The large-diameter portion of the base and the joint are detachably coupled by a tightening force between the latch and the hook-shaped protrusion corresponding to the latch, and a flexible extension tube is connected to the joint A pipe lining material reversing device characterized in that one end of the pipe lining material is folded and attached to the outer periphery of one end of the base on the small diameter side. 2. The pipe lining material reversing device according to claim 1, wherein the small diameter part at one end of the die is set to a diameter of 100 mm to 400 mm , and the large diameter part at the other end is set to a diameter of 300 mm to 600 mm . It has a bend-shaped base having different diameters at one end and the other end, and a tubular joint corresponding to the large-diameter portion of the base. The large-diameter portion and the joint of the base are a latch and a hook-shaped protrusion corresponding to the latch. Using a pipe lining material reversing device constructed by connecting a flexible extension tube to the joint while being detachably coupled by a tightening force with a piece,
A pipe lining material impregnated with a thermosetting resin is passed through the extension tube and the base, and one end of the pipe lining material is folded outward and attached to the outer periphery of the small diameter portion of the base, and the joint is attached to the large diameter portion of the base. After connecting the extension tube through the tube, the base is introduced into the manhole and the small diameter portion is directed to the inlet of the conduit, and in this state, the extension tube is raised from the large diameter portion side to the inside of the base. A pipe lining reversal method characterized in that a liquid is supplied and a pipe lining material is reversely inserted into a pipe line by the liquid pressure.

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