JPH0534917Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an inversion lining device used in an inversion lining method that can be applied to sewerage, water supply, oil pipes, and all other existing piping, and in particular relates to easily obtaining inversion pressure. It is something.

[Conventional technology] In recent years, the inner surfaces of existing pipes have been lined with synthetic resin, and the inner surfaces of existing pipes have been lined with synthetic resin for the purpose of reinforcing the strength of existing pipes, such as sewerage and water supply pipes, taking anti-corrosion measures, preventing water leaks and flooding, and improving flow rates. The inverted lining method for forming pipes is attracting attention. This construction method is disclosed in, for example, US Pat. No. 3,230,129, US Pat.

As shown in FIG. 5, the inverted lining construction method disclosed in U.S. Pat. One end of the resin tube 55 is inserted, and the end portion 55a of the resin tube 55 is folded back and fixed to the inner surface of the existing tube 51 in an annular shape. If compressed air is injected from the fluid supply pipe 56 of the pressure vessel 53 in this state, a pressure difference will be generated between the inner and outer surfaces of the inverted portion 57 of the resin tube 55, so the folded resin tube 55 will be inverted so that the inner surface is on the outside. Meanwhile, the reversing section 57 advances inside the existing pipe 51. As the reversing section 57 advances, the inverted resin tube 55 is transferred to the existing pipe 51.
expands and adheres to the inner surface of the membrane to form a new lining layer. In this construction method, the resin tube 55 in a relatively tightly folded state is attached to the pressure vessel 53.
It is sent from an external supply reel (not shown) and used.

Further, as shown in FIG. 6, in the construction method disclosed in US Pat. No. 2,794,758, a tubular liner 61 having a length necessary and sufficient for lining is stored in the pressure vessel 53 in advance. After the tip of the liner 61 is folded back and fixed to the inner surface of the existing pipe 51 in an annular shape, fluid, mainly water, is injected into the pressure vessel 53 to expand the reversible part 57 while advancing the inside of the existing pipe 51. A liner 61 is crimped onto the inner surface of the tube. This liner 61 is made of a relatively thin and flexible material.

In addition, the construction method disclosed in British Patent No. 1449455 is
This construction method uses a relatively thick and flexible resin tube with an asbestos material (needle felt, fabric, etc.) impregnated with hardening resin on the inside and laminated with an impermeable membrane on the outside.

As shown in FIG. 7, in this construction method, an outer cylinder hose 71 is vertically erected using means such as a tower to obtain reverse pressure, and the tip of a resin tube 72 passing through this outer cylinder hose 71 is attached to the inner surface of the existing pipe 51. After fixing in an annular shape, water is injected into the inside of the outer cylinder hose 71 using a pump 73. Since water head pressure is generated in the inverted portion 57 of the resin tube 72 by this water injection, the inverted portion 57 is advanced into the existing pipe 51 using this water head pressure.
After the resin tube 72 has been reversed and advanced, a synthetic resin pipe is formed within the existing pipe 51 by curing the curable resin while the resin tube 72 remains in close contact with the inner wall of the existing pipe 51. It is a construction method.

Other inversion lining construction methods are appropriate combinations or improvements of these construction methods. For example, the construction method disclosed in Japanese Patent Application Laid-Open No. 57-38114 uses a lining material whose inner surface is coated with an adhesive. In place of the slit 54 of the pressure vessel 53 shown in FIG. 5, a pair of rotating drums 82 are provided which have a plurality of protrusions 83 made of an elastic material at the opening 81 of the pressure vessel 53, as shown in FIG.
a, 82b are provided, and the lining material 84 is pressed at at least two places by the protrusions 83 as it advances, thereby preventing the adhesive on the inner surface from being squeezed out by the slits.

[Problem to be solved by the invention] In the conventional construction method shown in FIG. There is a need. However, sealing the slit 54 with flexible rubber does not maintain airtightness, and it is relatively difficult to control the pressure of air, which is a compressible fluid.

Furthermore, if a relatively thick and flexible resin tube impregnated with a hardening resin used in the method shown in FIG. 7 is used in this construction method, when the resin tube passes through the slit 54, the slit 5
4, the impregnated curable resin is squeezed out before the slit 54, and after passing through the slit 54, the thickness of the resin tube becomes thinner, and the distribution of the curable resin becomes uneven, resulting in impregnation. There is also the disadvantage that defects occur and a good synthetic resin pipe cannot be formed.

In addition, in the construction method shown in FIG. 6, since the tubular liner 61 is housed in the pressure vessel 53, there is no problem with airtightness, but the length of the liner 61 that can be housed in the pressure vessel 53 is There is a limit to For this reason, the construction distance is limited, and long-distance construction requires a large-capacity pressure vessel, which is disadvantageous in that it is inconvenient to handle.

In addition, the construction method using water head pressure shown in Figure 7 does not cause problems such as airtightness or squeezing out the hardening resin, but the cross-sectional area is small, especially in the case of small-diameter pipes with a diameter of 150 mm to 200 mm. Therefore, in order to obtain the required reversal pressure, it is necessary to increase the water head pressure. For this reason, a tower or the like on which the outer cylinder hose 71 is erected has to be raised, and when construction is carried out in an urban area, electric wires, street trees, etc. may become obstacles, and a large area of work space must be taken up.

Furthermore, in the case of long-distance construction, it was necessary to make the tower higher as well, which had the disadvantage of prolonging the construction period and increasing the risk.

In addition, as shown in FIG. 8, a pair of rotating drums 8
When a relatively thick and flexible resin tube impregnated with a curable resin is squeezed using the protrusions 83 provided on 2a and 82b, the distance between the protrusions 83 is short, so that the impregnated curable resin will leak into the pressure vessel. Squeezed out to the front,
The disadvantage was that the distribution of the curable resin became uneven, making it impossible to form a good synthetic resin pipe.

This invention was devised to solve these shortcomings, and the object is to provide an inversion lining device that has a simple structure and can safely form a good synthetic resin pipe inside an existing pipe.

[Means for Solving the Problems] An inversion lining device according to this invention moves a pressure vessel, a partition wall attached to the pressure vessel, a pair of guide members provided perpendicularly to the partition wall, and the guide member. Equipped with a sliding plate and a water pressure pump.

The pressure vessel has an annular fixing part at its bottom tip that fixes annularly by folding back one end of a flattened flexible resin tube from the inside, and is erected perpendicularly to the ground surface.

The partition wall is provided at the center of the interior of the pressure vessel, has a rectangular opening in the center, and partitions an upper storage water tank and a lower pressurized water tank.

A pair of guide members are provided vertically within the opening of the partition wall and guide the resin tube.

The sliding plate is attached to one or both of the guide members, has a movable membrane between it and the partition wall, and is moved along the partition wall by differential transmission means.

The water pressure pump is connected to a pressurized water supply pipe provided on the lower side of the partition wall.

Furthermore, if a relief pipe is provided that branches off from the pressurized water tank and is connected to the reservoir tank via a safety valve, the pressure of the pressurized water can be easily adjusted.

Furthermore, by providing an overflow pipe on the upper side of the water tank, overflow from the water tank can be prevented.

[Function] In this invention, the pressure vessel is divided into a storage water tank in the upper part and a pressurized water tank in the lower part by the partition wall, the guide member, and the movable membrane attached between the sliding plate and the partition wall, and the opposing guide member While guiding a relatively thick and flexible resin tube impregnated with a curable resin, the resin tube is inverted and advanced into the existing pipe using pressurized water supplied from a hydraulic pump.

When this resin tube is reversed and advanced, a water layer for water supply is also provided in the reservoir tank, so even if pressurized water leaks from the pressurized water tank to the upper part, the water layer in the upper reservoir tank is Acts as a buffer layer,
Prevents pressurized water from blowing out.

Further, by using water, which is an incompressible fluid, as the pressure medium for the reversal pressure of the resin tube, pressurization and control can be easily performed. For this pressure control, the pressure of the pressurized water can be regulated by providing a relief pipe branching from the pressurized water tank and having a safety valve.

Furthermore, by providing an overflow pipe on the upper side of the water storage tank, overflow of the water storage tank is reliably prevented.

[Example] Figures 1 and 2 show an example of this invention,
FIG. 1 is a perspective view showing the appearance of the inversion lining device, and FIG. 2 is a sectional view of the pressure vessel. In the figure, 1 is a resin tube that is formed on the inner surface of an existing tube and becomes a synthetic resin tube. The resin tube 1 has an inner surface made of a woven or nonwoven fabric impregnated with a thermosetting resin such as an epoxy resin or a polyester resin, or a photocurable resin such as a polyester resin, and a synthetic resin film laminated on the outer surface. , or a relatively thick and flexible long tube made of an impermeable membrane coated with an elastic elastomer, or a double structure or multilayer structure, or a relatively thick and flexible long tube with glass fiber or nylon fiber folded into it as a reinforcing material. It is formed by folding it flat.

2 is a simple pressure vessel formed into a rectangular parallelepiped, and a circular guide tube 3 is attached to the bottom of the pressure vessel 2. A bent tube 4 is attached to the tip of the guide tube 3 and has an annular fixing portion 4a for fixing one end of the resin tube 1 in an annular shape by folding it back from the inside and inverting it.

Reference numeral 5 denotes a partition wall attached to the center of the interior of the pressure vessel 2, and the partition wall 5 has a rectangular opening 6 in the center. Reference numerals 7a and 7b are guide members provided vertically within the opening 6, and one guide member 7a is attached to the partition wall 5.
The guide member 7b is fixed to a sliding plate 8 provided on the lower surface of the guide member 7b and is movable in the left-right direction.
is fixed to the partition wall 5.

Reference numeral 9 denotes a movable membrane whose ends are fixed to the upper surface of the sliding plate 8 and the lower surface of the partition wall 5, respectively, as shown in the partial cross-sectional view of FIG. A strong and chemically stable material, such as glass cloth coated with fluororesin, is used.

Reference numeral 10 denotes a guide plate provided integrally with the sliding plate 8 at the lower part of the sliding plate 8, and the end of the guide plate 10 is fitted into a guide groove (not shown) provided on the side wall of the pressure vessel 2. This prevents the sliding plate 8 from shifting vertically and horizontally. 11 is a sliding plate 8 that rotates with a handle 12;
The rotation axis 11 is a rotation axis that moves in the left and right direction.
A differential screw mechanism 13 is provided between the pressure vessel 2 and the side wall of the pressure vessel 2 .

The partition wall 5, guide members 7a, 7b, and movable membrane 9 partition the pressure vessel 2 into upper and lower parts, with the lower part serving as a pressurized water tank 14 and the upper part serving as a reservoir tank 15.

16 is a water pressure pump, the discharge port of the water pressure pump 16 is connected to the pressurized water tank 14 of the pressure vessel 2 via a water supply hose 17 and a water supply valve 18, and the suction port is connected to a water supply tank 20 via a water supply hose 19. ing. The water supply tank 20 and the pressurized water tank 14 are connected by a pressure regulating valve 21 and a flow rate/pressure regulating hose 22. On the other hand, the reservoir tank 15 and the water supply tank 20 of the pressure vessel 2 are operated by an overflow valve 23.
and is connected by an overflow hose 24.

25 is a relief pipe provided between the pressurized water tank 14 and the reservoir tank 15, and a safety valve 26 is attached to the relief pipe 25.

Next, the operation of forming a synthetic resin pipe using the resin tube 1 in which the inner surface of an existing sewer pipe 27 is impregnated with a thermosetting resin using the inversion lining apparatus configured as described above will be described.

First, the pressure vessel 2 is installed vertically to the ground surface near the manhole or the mouth of the existing pipe 27. At the same time, a water supply tank 20 and a hydraulic pump 16 are installed near the pressure vessel 2. After that, the water tank 20
The water pressure pump 16 and the water supply valve 18 of the pressurized water tank 14 are connected by water supply hoses 19 and 17, and the pressure adjustment valve 21 and the water supply tank 20 are connected by a flow rate/pressure adjustment hose 22. Further, an overflow hose 24 is connected to the overflow valve 23 of the water storage tank 15, and the tip of the overflow hose 24 is put into the water supply tank 20. Further, a water supply hose 28 connected to a water source such as a water pipe is arranged above the water supply tank 20.

In addition, the existing pipes are flexible and usually have a thickness of 3 mm or more.
A long resin tube 1 having a length corresponding to the length of 7 is conveniently placed for long-distance reversal and insertion.
It is placed in a flat folded state outside the upright pressure vessel 2. A hot water circulation hose 30, which is slightly longer than the resin tube 1 and has a plurality of drainage holes at its tip, is fastened to the rear end of the resin tube 1.

The tip of this resin tube 1 is inserted between a pair of guide rollers 29 provided at the upper end of the pressure vessel 2. Thereafter, the distal end of the resin tube 1 is drawn through the water storage tank 15, between the guide members 7a and 7b, through the pressurized water tank 14 and the guide tube 3 to the bent pipe 4. The tip of the resin tube 1 that has been drawn into the bent tube 4 is folded back from the inside as shown in the partial sectional view of FIG. 4, and the folded portion 1a is fixed to the annular fixing portion 4a of the bent tube 4. Then, the folded portion 1a is brought close to the tip of the existing pipe 27.

Next, the handle 12 is rotated to move the sliding plate 8 to which the movable membrane 9 is attached toward the center of the pressure vessel 2, thereby moving the guide member 7a toward the guide member 7b. Then, as shown in FIG. 3, the guide member 7
a, 7b are slightly in contact with the resin tube 1,
Alternatively, the spacing may be adjusted to 2 mm or less to prevent the resin from squeezing out of the flexible resin tube 1. When the guide member 7a is moved, the curved portion 9a of the movable membrane 9 moves toward the center to seal the opening formed between the guide member 7a and the partition wall 5.

In this state, the water pressure pump 16 is driven while supplying water from the water supply hose 28 to the water supply tank 20. Pressurized water is sent to the pressurized water tank 14 by driving the water pressure pump 16 . When the pressurized water tank 14 is filled with pressurized water, a portion of the pressurized water leaks into the water storage tank 15 through the gap between the resin tube 1 and the guide members 7a and 7b to form a water layer. On the other hand, since the discharge amount of the water pressure pump 16 is larger than the amount of water leaking into the water storage tank 15, the pressure of the pressurized water filled in the pressurized water tank 14 increases, and this pressurized water is sent to the inverted portion 1b of the resin tube 1. It will be done. Since the inverted portion 1b of the resin tube 1 is a free end, it enters the existing pipe 27 due to the pressure difference between atmospheric pressure and pressurized water, and the resin tube 1 is inverted and inserted into the existing pipe 27.

When this resin tube 1 is reversed and inserted into the existing pipe 27, if the diameter of the existing pipe 27 is 250 mm, it can be easily reversed and inserted with a reversing pressure of 0.5 Kgf/cm ² or less. In order to maintain this reverse pressure, pressurized water is pumped by the water pressure pump 16, but from the relationship between the discharge amount and the total head of the water pressure pump 16, the narrower the interval between the guide members 7a, 7b and the resin tube 1, the more the pressurized water tank. The pressure within 14 increases. Therefore, in order to prevent an excessive increase in pressure and obtain an appropriate reverse insertion pressure and insertion speed, the opening degree of the pressure regulating valve 21 is adjusted to return a portion of the pressurized water to the water supply tank 20 while keeping the pressure of the pressurized water at a constant pressure. Control. By continuously supplying pressurized water controlled to a constant pressure to the pressurized water tank 14 in accordance with the insertion speed of the resin tube 1, the resin tube 1 can be reversed and inserted into the existing gap 27 over a long distance.

When this resin tube 1 is reversed and inserted into the existing space 27, the resin tube 1 is inserted into the guide member 7.
Since it passes between a and 7b with light contact or non-contact, the thermosetting resin impregnated in the resin tube 1 is not squeezed, and the thermosetting resin is always inverted in a uniform distribution state. Can be done.

In addition, pressurized water spouts out into the water storage tank 15 from the gap between the guide members 7a, 7b and the resin tube 1, but the water layer in the water storage tank 15 acts as a buffer layer, suppressing the pressurized water from blowing out to the outside. There is.
Therefore, dangers caused by pressurized water blowing out can be prevented.

Furthermore, since a relief pipe 25 having a safety valve 26 is provided between the pressurized water tank 14 and the stored water tank 15, the set pressure of the pressurized water is, for example, 0.5 kg.
If the pressure rises from f/cm ² for some reason, the safety valve 26 operates and the increased pressure is transferred to the water tank 15.
to escape. Therefore, an abnormal pressure increase in the pressurized water tank 14 occurs, that is, the inverted portion 1 of the resin tube 1
This can prevent high pressure from being applied to b.

On the other hand, when water accumulates in the water tank 15 above a certain level, the water flows through the overflow valve 23 and the overflow hose 2.
4, the water is returned to the water supply tank 20, and is again sent to the pressurized water tank 14 by the water pressure pump 16 for use.

In this way, the resin tube 1 is connected to the existing pipe 27.
After inserting the resin tube 1 into the interior while inverting and expanding it, and pressing and fixing the resin tube 1 on the entire inner surface of the existing pipe 27,
Resin tube 1 using hot water circulation hose 30 etc.
The thermosetting resin impregnated in the pipe is heated and cured, and the existing pipe 27 is heated and cured.
A synthetic resin tube having a predetermined wall thickness is formed inside.

[Effects of the invention] As explained above, this invention divides the pressure vessel into a reservoir tank at the top and a pressurized water tank at the bottom using a partition wall, a guide member, and a movable membrane, and a curable resin is divided into a tank at the bottom by a partition wall, a guide member, and a movable membrane. While guiding the impregnated, relatively thick and flexible resin tube with light contact or non-contact, the resin tube is reversed and advanced into the existing pipe using pressurized water supplied from a hydraulic pump, so the guide member can easily guide the resin tube. Since the resin tube is reversed and advanced without pressing, the distribution of the thermosetting resin impregnated in the resin tube can be reversed in a uniform state at all times, and a good synthetic resin pipe can be formed inside the existing pipe. can do.

In addition, since the space between the partition wall and the guide member is sealed by a movable membrane, the water-stopping effect can be improved, pressure retention can be ensured, and the movement of the guide member can be adjusted with high precision. be able to.

In addition, since the resin tube is reversed and advanced into the existing pipe using pressurized water supplied from a water pressure pump, there is no need to erect towers or other structures to obtain reverse pressure, so there is no need to erect power lines, street trees, or other obstacles. It is not affected by the problem, and the area occupied by the work can be reduced, making it easy to perform construction in urban areas or in narrow spaces.

When this resin tube is reversed and advanced, there is also a layer of water in the reservoir tank, so even if pressurized water leaks from the tank to the upper part, the water layer in the upper reservoir tank will still remain. acts as a buffer layer and prevents pressurized water from blowing out to the outside, making it possible to safely form synthetic resin pipes.

Further, by using water, which is an incompressible fluid, as the pressure medium for the reversal pressure of the resin tube, pressurization and control can be easily performed.

For pressure control, pressurized water can be regulated to a predetermined pressure by using a pressure regulating valve or a safety valve attached to the relief pipe.

Further, since the resin tube can be supplied from outside the pressure vessel and the reversal pressure can be easily adjusted, long-distance construction can be carried out at once, and construction efficiency can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the external appearance of an embodiment of this invention, Fig. 2 is a perspective view showing a cutaway part of the pressure vessel of the above embodiment, and Fig. 3 shows a part of the above embodiment. A detailed view, FIG. 4 is a sectional view showing the inverted part of the resin tube of the above embodiment, FIGS. 5 to 8 each show a conventional example, and FIG. 5 is a partially cutaway perspective view. 6, 7 and 8 are cross-sectional views. 1...Resin tube, 2...Pressure vessel, 3...
Guide chain, 4... Bent pipe, 5... Bulkhead, 6
...Opening, 7a, 7b...Guide member, 8...Sliding plate, 9...Movable membrane, 13...Differential screw mechanism, 1
4... Pressurized water tank, 15... Storage water tank, 16
...Water pressure pump, 20...Water tank, 21...
Pressure adjustment valve, 23... Overflow valve, 25...
Relief pipe, 26... Safety valve, 27... Existing pipe.

Claims (1)

[Claims for Utility Model Registration] 1. A pressure vessel which has an annular fixing part at the bottom tip for fixing annularly by folding back one end of a flatly folded flexible resin tube from the inside, and which is installed on the ground surface. , a partition wall provided in the center of the interior of the pressure vessel and having a rectangular opening in the center to partition an upper reservoir water tank and a lower pressurized water tank; and a partition wall provided vertically within the opening of the partition wall, and including the resin tube. a pair of guide members having a passage in the center; a sliding plate attached to one or both of the guide members and having a movable membrane between the partition wall; and a differential transmission for moving the sliding plate. and a water pressure pump connected to a pressurized water supply pipe provided on a lower side surface of the partition wall. 2 Claim 1 comprising a relief pipe branched from the pressurized water tank and connected to the reservoir tank via a safety valve.
Inversion lining device as described. 3. The inversion lining device according to claim 1 or 2, further comprising an overflow pipe on an upper side surface of the water storage tank.