JPH0534916Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a reversal lining device used in the reversal lining method that can be applied to sewerage, water supply, oil pipes, and all other existing piping, and in particular relates to easily obtaining reversal 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, preventing corrosion, 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 British Patent No. 3230129 consists of a flexible resin tube 55 that is folded flat through a slit 54 of a pressure vessel 53 into an existing tube 51 coated with a viscous adhesive 52. One end of the resin tube 55 is inserted, and the end 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 occur 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 its inner surface faces outward. 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, a relatively hard folded resin tube 55 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 advance in the pressure vessel 53. 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 a non-permeable membrane laminated 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. This injection generates water head pressure in the inverted portion 57 of the resin tube 72, and this water head pressure is used to advance the inverted portion 57 into the existing pipe 51.
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 ridges 83 as it advances, thereby preventing the adhesive on the inner surface from being pushed back by the slits.

[Problem to be solved by the invention] However, in the construction method shown in FIG. There is a need. However, slit 54
However, sealing with flexible rubber does not ensure 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 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] The inversion lining device according to this invention includes a pressure vessel, a partition wall attached to the pressure vessel, a pair of sliding plates attached to the partition wall, and a pair of sliding plates attached to each sliding plate. It includes a guide member, rotational drive means, and a hydraulic 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 water supply tank and a lower pressurized water tank.

A pair of sliding plates are respectively attached across the opening of the partition wall, and are slidable in the left and right directions relative to the opening by means of racks and gears. A guide member is vertically attached to each end of the sliding plate on the opening side. Furthermore, a rotational drive means is connected to a gear that moves each sliding plate in opposite directions.

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

Further, if a vertical pipe of a certain length is provided which branches from the pressurized water supply pipe and whose tip opening is disposed above the water supply tank, the pressure of the pressurized water can be easily adjusted.

[Function] In this invention, the pressure vessel is divided into a water supply tank in the upper part and a pressurized water tank in the lower part by a partition wall, a sliding plate, and a guide member, and the opposing guide members are made of a relatively thick container impregnated with a curable resin. While guiding the flexible resin tube, the resin tube is reversed 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 water supply tank, so even if pressurized water leaks from the pressurized water tank to the upper part, the water layer in the upper water supply tank will buffer it. Acts as a layer to prevent 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 pressure control, by using a vertical pipe of a certain length branched from the pressurized water supply pipe, the pressure of the pressurized water can be regulated with a water head pressure that corresponds to the length of the vertical pipe.

[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. 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 is, for example, made of a woven or nonwoven fabric impregnated with a thermosetting resin on the inside, and a double-walled outer surface laminated with a synthetic resin film or coated with an elastic elastomer to make it an impermeable film. It is formed by folding a relatively thick and flexible elongated tube into a flat structure, or having a multi-layered structure or folding glass fiber or nylon fiber into the structure as a reinforcing material.

2 is a simple pressure vessel formed into a rectangular parallelepiped, and a circular tube outlet portion 3 is attached to the bottom of the pressure vessel 2 . The tube outlet portion 3 has an annular fixing portion 4 at its tip end, which fixes 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 10 in the center. 6a and 6b are a pair of sliding plates attached to the partition wall 5 with the central opening 10 in between;
a and 6b have a rack 7 at the bottom thereof, and are moved in the left-right direction in the figure across an opening 10 by rotation of a gear 8 attached to the pressure vessel 2. This sliding plate 6
As shown in the detailed view of FIG. 3, the opening side ends of a and 6b have a guide member 9 made of, for example, hard rubber and provided along the vertical direction.

Reference numerals 11 and 12 indicate drive gears attached to the rotating shaft of the gear 8. The drive gears 11 and 12 are meshed with each other and rotated in opposite directions by rotating the handle 13, and sliding by rotating the left and right gears 8. The moving plates 6a and 6b are moved in opposite left and right directions.

The partition wall 5, the sliding plates 6a, 6b, and the guide member 9 partition the pressure vessel 2 into upper and lower parts, with the upper part serving as a water supply tank 14 and the lower part serving as a pressurized water tank 15.

16 is a water supply pipe provided on the side of the water supply tank 14 of the pressure vessel 2; 17 is a pressurized water supply pipe provided on the side of the pressurized water tank 15;
and pressurized water supply pipe 17 are connected to valves 18 and 19, respectively.
It is connected to the water pressure pump 20 via.

Reference numeral 21 denotes a standpipe that is branched from the pressurized water supply pipe 17 and erected to a predetermined length, and the U-shaped tip opening 21a of the standpipe 21 is connected to a bell mouth pipe 22 provided in the water supply tank 14. It communicates with the upper end of. 23 is an adjustment valve provided in the middle part of the vertical pipe 21.

A sealing lid 24 is provided on the upper part of the pressure vessel 2. A hot water outgoing pipe 25 is fixed to the center of the sealing lid 24, and the lid 24 is attached to the pressure vessel 2 so as to be openable and closable in one direction. 26 is a hot water return pipe attached to the lower part of the pressure vessel 2, and the hot water outward pipe 25 and the hot water return pipe 26 are connected to a heating boiler 29 via valves 27 and 28, respectively.

The operation of forming a synthetic resin pipe on the inner surface of, for example, an existing sewer pipe 30 using the reversing lining device configured as described above will be described.

First, the pressure vessel 2 is installed, for example, right above a sewer manhole. It is also flexible and typically has a thickness of 3 mm.
A long resin tube 1 having a length corresponding to the length of the existing pipe 30 is placed outside the pressure vessel 2 which is erected so as to be convenient for long-distance reversal and insertion.
Keep it folded flat. A hot water circulation hose 31, 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.

Therefore, by operating the handle 13, the sliding plate 6a,
6b to determine the interval between the left and right guide members 9 according to the thickness of the resin tube 1. The distance between the guide members 9 is, for example, larger than the thickness of the resin tube 1.
There is no problem even if it is about 1.5 mm larger.

After setting the interval between the guide members 9, insert the tip of the resin tube 1 into the pressure vessel 2, pull it out through the guide members 9 to the annular fixing part 4 at the bottom of the pressure vessel 2, and then pull the pulled out tip from the inside. It is inverted and fixed to the annular fixing part 4. Then, the annular fixing part 4 to which the distal end of the resin tube 1 is fixed is brought close to the distal end of the existing pipe 30 as shown in FIG.

Next, a considerable amount of water is supplied to the water supply tank 14 located at the upper part of the pressure vessel 2 through a faucet 32 from a water supply source such as a water pipe. At the same time, water supplied to the water supply tank 14 is sent to the water pressure pump 20 from the water supply pipe 16. The water pressure pump 20 pressurizes the sent water to a pressure that matches the diameter and strength of the resin tube 1, and pressure-feeds it to the pressurized water tank 15 through the pressurized water supply pipe 17, setting the water pressure in the pressurized water tank 15 to a predetermined pressure. . While the water in the pressurized water tank 15 is pressurized, water is always stored in the upper water supply tank 14. Therefore, even if pressurized water leaks to the upper part from the gap between the resin tube 1 and the guide member 9,
The water layer in the water supply tank 14 acts as a buffer layer, suppressing pressurized water from blowing out to the outside, and preventing danger from pressurized water blowing out.

When the water in the pressurized water tank 15 is pressurized in this way, the inverted part 1a of the resin tube 1 fixed to the annular fixing part 4 has a differential pressure between the water pressure in the pressurized water tank 15 and the atmospheric pressure in the existing pipe 30. occurs, and the inverted portion 1a expands inward of the existing pipe 30.

In this state, while injecting water into the water supply tank 14, the water pressure pump 20 is operated to supply pressurized water to the pressurized water tank 1.
Supply to 5. The supply of pressurized water causes the resin tube 1 to advance inside the existing pipe 30 while being reversed and expanded, and the resin tube 1 is successively pressed and fixed onto the inner surface of the existing pipe 30.

At this time, the distance between the left and right guide members 9 is, for example, about 1.5 mm larger than the thickness of the resin tube 1.
Even if the cross-sectional area of the gap is 10 ^cm2 , the capacity is 0.05 to 0.23.
Using the water pressure pump 20 of m ³ /min, the advancing speed of the resin tube 1 to the existing pipe 30 with an inner diameter of 250 mm is 1 to 1.
3 m/min, the pressure of the pressurized water acting on the inverted part 1a of the resin tube 1 is 0.4 to 0.5 Kg/cm ² by adjusting the discharge rate of the water pressure pump 20 and the adjustment valve 23.
It can be done. The pressure of this pressurized water is an appropriate state as judged from the properties of the resin tube 1, such as its tensile strength and circular expansion property, and the working speed.

To adjust the pressure of this pressurized water, pressurized water supply pipe 17
Resin tube 1 at the height of vertical pipe 21 branched from
It is a good idea to set the minimum pressure required for reversal.
And, while the resin tube 1 is in progress, the adjustment valve 2
By adjusting the opening degree in step 3, pressurized water is sequentially supplied while adjusting the pressure to a standard setting pressure higher than the minimum setting pressure. In addition, a pressure regulating valve is attached to the bulkhead 5 instead of the vertical pipe 21, so that when the pressure of pressurized water rises above the set pressure, it can be discharged to the water supply tank 14, or a pressure sensor can be installed in the pressurized water tank 15 to control the pressure inside the pressurized water tank 15. The hydraulic pump 20 that detects the pressure may be controlled.

In this way, when reversing and advancing the resin tube 1 while adjusting the pressure of pressurized water, there is no need to press the resin tube 1 with the guide member 9, so that the thermosetting resin impregnated in the resin tube 1 is The distribution can always be inverted in a uniform state.

As described above, the resin tube 1 is inserted into the existing pipe 30 while being inverted and expanded, and the resin tube 1 is pressed and fixed to the entire inner surface of the existing pipe 30. Then, the heat curing process of the thermosetting resin impregnated in the resin tube 1 is started.

When the resin tube 1 is completely inverted, a portion of the hot water circulation hose 31 connected to the rear end of the resin tube 1 remains above the pressure vessel 2, as shown in FIG. Therefore, the rear end of the hot water circulation hose 31 is attached to the hot water outgoing pipe 25 of the airtight lid 24, and the heating boiler 29 is heated.
is operated to send hot water to the hot water circulation hose 31. The hot water sent to the hot water circulation hose 31 is ejected from a plurality of drainage holes provided at the tip of the hot water circulation hose 31 into the resin tube 1 fixed to the inner surface of the existing pipe 30, and passes through the resin tube 1. Return to heating boiler 29.

When the resin tube 1 is maintained at a temperature and time suitable for curing the thermosetting resin by circulating hot water in this way, the thermosetting resin that has permeated into the resin tube 1 is heated and hardened, and the inside of the existing pipe 30 is heated. A new synthetic resin pipe can be formed with a predetermined wall thickness.

[Effects of the invention] As explained above, this invention divides the pressure vessel into a water supply tank in the upper part and a pressurized water tank in the lower part using a partition wall, a sliding plate, and a guide member, and a curable resin is While guiding the impregnated relatively thick and flexible resin tube, the resin tube is reversed and advanced into the existing pipe using pressurized water supplied from a water pressure pump, so there is no need to press the resin tube with the guide member. Since the resin tube is reversed and advanced, the distribution of the thermosetting resin impregnated in the resin tube can be reversed at all times in a uniform state, and a good synthetic resin pipe can be formed in the existing pipe.

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, a water layer for water supply is also provided in the water supply tank, so even if pressurized water leaks from the pressurized water tank to the upper part, the water layer in the upper water supply tank will buffer it. It acts as a 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, by using a vertical pipe of a certain length that branches off from the pressurized water supply pipe, the pressure of the pressurized water can be regulated with a water head pressure that corresponds to the length of the vertical 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 appearance of an embodiment of the present invention, FIG. 2 is a cross-sectional view of the embodiment, FIG. 3 is a detailed view showing a part of the embodiment, FIG. 4 is a cross-sectional view explaining the heat curing process of the embodiment, and FIGS. 5 to 8 are
Each of the figures shows a conventional example, Fig. 5 is a partially cutaway perspective view, and Figs. 6, 7 and 8 are sectional views. 1: resin tube, 2: pressure vessel, 3:
Tube outlet portion, 4... annular fixing portion, 5... partition wall, 6a, 6b... sliding plates, 7... rack, 8...
... gear, 9... guide member, 10... opening, 1
1, 12 ... driving gear, 13 ... handle, 1
4...Water supply tank, 15...Pressurized water tank, 20
...Water pressure pump, 21...vertical pipe, 30...existing pipe.

Claims (1)

[Claims for Utility Model Registration] 1. A tube having 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 standing perpendicular to the ground surface. a pressure vessel provided in the center of the interior of the pressure vessel, a partition wall having a rectangular opening in the center and separating an upper water supply tank and a lower pressurized water tank; a pair of sliding plates that can be slid in the left and right directions with respect to the opening by a gear; a guide member that is attached perpendicularly to the tip of each sliding plate on the opening side; and a guide member that is connected to a gear that moves each sliding plate. It is characterized by comprising a rotation drive means for rotating the gears in opposite directions, and a water pressure pump connected to a pressurized water supply pipe provided on the lower side surface of the partition wall and a water supply pipe provided on the upper part of the partition wall. Inversion lining device. 2. The inversion lining device according to claim 1, further comprising a vertical pipe of a certain length branching from the pressurized water supply pipe and having a tip opening disposed above the water supply tank.