JP5934525B2 - Hose laying method - Google Patents

Description

  The present invention relates to a hose laying method, and more particularly to a hose laying method that is particularly suitable for conditions in which laying work is difficult, such as when the ground surface of the laying place is bad.

  Conventionally, it is sometimes required to quickly lay hoses for various purposes such as water supply hoses, fire hoses, or drainage hoses at disaster-affected sites such as earthquakes, fires, and typhoons. .

  For example, when a nuclear power plant or chemical plant is damaged by an earthquake or a fire, the supply of industrial water is stopped, and as a result, the equipment may be greatly damaged. Therefore, when such an emergency situation occurs, it is necessary to reconstruct a system for supplying water as soon as possible by competing for one hour a day. However, in a general plant, water taken from a river flowing in the vicinity is supplied by an industrial water pipe, and such an industrial water pipe is embedded in the ground. In many cases, when an industrial water pipe is damaged due to an earthquake or the like and water supply is stopped, it takes a considerable time to recover. In such a case, it is possible to construct a water supply system at a disaster site at an early stage by laying a hose from a water source to a water supply destination such as a plant.

  In addition, when a landslide due to an earthquake or heavy rain occurs, a dammed lake may be formed if the flowing sediment accumulates and the river water is dammed. And if the water level of the dam lake rises due to further heavy rain or river increase, the portion that dams up the water (the levee portion of the dam lake) will break down, which may cause great damage downstream. In such a case, in order to quickly drain the water of the dam lake, it is possible to construct a drainage channel by laying a drainage hose quickly from the opposite side of the dam to the dam lake. Desired.

  Regarding the laying of the hose in such an emergency, Patent Document 1 discloses a self-propelled device for laying a fire hose or the like. The device disclosed in Patent Document 1 includes a cart that can be self-propelled, a reel that is rotatably installed on the cart, and a reel drive mechanism that rotationally drives the reel. Then, in a state where the reel around which the hose is wound is installed on the carriage, the carriage is caused to travel to the destination while the reel is rotated and the hose is pulled out. This makes it possible to easily and quickly lay a heavy hose up to a destination away from the water source.

JP 2006-289 A

  Although the self-propelled device of Patent Document 1 is certainly suitable for laying a heavy hose quickly, it is only required to lay on a flat ground where such a device can run. It is assumed. Therefore, the hose while running such a self-propelled device when the ground condition of the laying place is bad, such as when unevenness or debris exists due to the occurrence of an earthquake, etc., or when the laying place is a steep slope It is quite difficult to lay. In that case, the hose is laid by human power. However, it is actually difficult to lay a heavy hose manually at the disaster site.

  For example, at the time of a disaster such as an earthquake, unevenness or cracks may be generated due to the rising or sinking of the ground at the hose laying place, or many debris generated by the collapse of the building may be scattered. In such a case, it is necessary to perform laying work while avoiding unevenness and cracks on the ground and removing rubble. For this reason, it takes a considerably long time to lay the hose, which is several days, sometimes several months.

  Moreover, when laying a drainage hose for draining from a dammed lake, it is necessary to lay a hose along the steep slope of the bank. In addition, on the slope of the dam of the dam lake, there are usually rocks and fallen trees that have fallen down due to landslides, and the ground surface is usually not flat and uneven. In addition, landslides are likely to occur. Under such conditions, it is impossible to lay a heavy hose in a short time by human power.

  An object of the present invention is to provide a hose laying method capable of quickly laying a hose even in an environment where laying work has been difficult in the past.

Means for Solving the Problems and Effects of the Invention

A hose laying method according to a first aspect of the present invention is a method of laying a hose at a laying place where an obstacle exists, wherein the hose is arranged at one of a water source and a water supply destination, A guide is installed at a position, one end of the hose is turned upside down and fixed, and the front end of the hose is turned upside down by applying pressurized air to the inside of the turned upside of the hose . The hose is laid from the one of the water source and the water supply destination to the other by moving over the obstacle while changing the direction by the guide or by moving forward while avoiding the obstacle. Is.

When one end of the hose is turned over and fixed, and pressurized air is applied to the inside of the turned over part, the front and back of the part connected to the fixed one end of the hose are reversed in turn, and the inversion position (The tip of the reversal) moves forward.

  In the present invention, it is not necessary to pull the hose because it is installed by reversing the front and back of the hose while continuously advancing the tip portion of the inversion, and a device for laying the hose is installed There is no need to run in the car. In addition, the hose can be laid so as to get over even when the ground condition is bad or there is an obstacle, and the hose can be laid quickly and easily. Further, since the non-inverted portion of the hose is drawn out inside the inverted hose, there is no friction between the hose and the hose is hardly damaged.

  In addition, even if it is unavoidable to avoid parts with poor ground conditions or obstacles, the direction of hose laying can be easily changed by simply changing the direction of the tip of the hose. . The hose can be bent or crushed flat. Therefore, in places where there are large obstacles such as trees, it is not possible to secure a large space for laying the hose, and even if there is only a relatively small space, the hose may be bent or flattened. It is possible to pass through a small space and lay a hose without avoiding obstacles.

  As described above, according to the present invention, when the ground state of the laying place where there is unevenness or debris is bad, when there is an obstacle, or when the laying place is a steep slope, Even in an environment where laying work is difficult, the hose can be laid easily and quickly.

  When reversing the hose with the pressure of pressurized air, the weight of the hose being reversed does not increase compared to the case of using a liquid such as water, and the laying direction is changed by changing the direction of the tip of the reversal. Or, the hose can be easily routed such that it is lifted when the tip of the reversal hits an obstacle or the like. In addition, when the laying place is a slope, water head pressure does not act, so it is easy to lay the slope above.

  According to the present invention, by installing a guide in advance, it becomes easier to lay while bending the hose with this guide, and the hose can be routed along a predetermined path while avoiding parts with poor ground conditions and obstacles. It becomes easy to lay.

Laying method of the hose of the second invention, in the first to third any one of the, two of the hose connecting, the reversal while one of the hose, by inverting the front and back by pressurized air The tip part is advanced, and when the connecting portion between the one hose and the other hose reaches the tip part of the reversal, the reversal of the one hose by the pressurized air is stopped, and then the reversal of the one hose is performed. After cutting the tip part and disconnecting the two hoses, and connecting the separated ends of the two hoses so that the fluid does not leak when the pressurized air acts in the hoses The reversal of the other hose is started by the pressurized air .

  According to the present invention, it is possible to construct a long distance by connecting two or more hoses one after another. Further, when one hose is inverted and laid, the other hose that is pulled and connected to the next hose has moved to the connection position, so that it is not necessary to transport the next hose separately.

The hose laying method according to a third aspect of the present invention is the first or second aspect of the invention, in which the protective cylinder having a diameter larger than that of the hose is laid while inverting the front and back with pressurized air , After laying the cylindrical body, the hose is inserted into the protective cylindrical body while inverting the front and back with pressurized air inside the protective cylindrical body.

  In the present invention, when the hose is inserted into the protective cylinder, the hose is protected by the protective cylinder and the hose is prevented from being damaged. Further, since the protective cylinder is laid while being reversed by the fluid pressure, the laying work of the protective cylinder having a larger diameter than the hose is facilitated. Also, it may be difficult to insert a long hose into the long protective cylinder by pulling it in, but in the present invention, the hose is inverted by pressurized air inside the protective cylinder. Therefore, since it is inserted into the protective cylinder, it is very easy to insert the same long hose into the long protective cylinder.

A hose laying method according to a fourth aspect of the present invention is the method according to any one of the first to third aspects, wherein a belt is inserted into the hose before inversion, and the front and back of the hose are reversed while pulling the belt. Thus, the tip end portion of the reversal is guided in the pulling direction of the belt.

  According to the present invention, the leading end portion of the inversion of the hose is guided by the belt, so that the direction in which the hose advances can be controlled. Further, by performing reversal while pulling the belt, it is possible to control the reversal speed (that is, laying speed) of the hose.

The hose laying method according to a fifth aspect of the present invention is the hose laying method according to any one of the first to fourth aspects, wherein the inversion of the hose is temporarily stopped and then the non-inversion portion of the hose is pulled and the tip end portion of the inversion is retracted. Then, the direction of the tip portion of the inversion is changed.

  According to the present invention, even if the hose has been laid in the wrong direction, the reversing is temporarily stopped and the reversing tip portion is retracted, and then the direction of the reversing tip portion is changed, thereby laying direction. Can be corrected in the correct direction.

It is a figure which shows the laying process of the hose for water supply based on 1st Embodiment of this invention. It is a figure which shows the state in the middle of laying a hose by inversion. It is sectional drawing of the hose at the time of inversion. It is a figure which shows the water supply process using a submersible pump. It is a figure which shows the water supply process using a pump vehicle. It is a figure which shows the laying process of the hose based on the modification of 1st Embodiment. It is sectional drawing of the hose which concerns on another modified form, and is a figure explaining the process of laying down connecting two hoses. It is sectional drawing of the protection cylinder and hose at the time of hose reversal insertion based on another modification. It is a figure which shows the laying process of the hose to the dam lake based on 2nd Embodiment of this invention. It is a figure which shows the drainage process from the dam lake after laying a hose. It is a figure which shows the connection of a hose and a submersible pump based on the modification of 2nd Embodiment. It is a figure which shows the laying process of the hose which concerns on another modified form.

(First embodiment)
Next, a first embodiment of the present invention will be described. In the first embodiment, when the supply of water to the factory is stopped due to the occurrence of a disaster such as an earthquake, a water supply hose is laid in the factory site in order to construct a water supply system temporarily. Drawing 1 is a figure showing the laying process of the hose for water supply concerning a 1st embodiment. As shown in FIG. 1, in the first embodiment, a water supply hose 5 is laid from a water source 100 (for example, a river or the sea) adjacent to a factory site toward a building 200 in the factory site.

A hose laying device 1 is disposed near the water source 100. The hose laying device 1 includes a cart 2 that can be self-propelled and a reel 3 that is rotatably mounted on the cart 2. Then, the hose laying device 1 pulls out the hose 5 wound around the reel 3 by rotating the reel 3. The structure of the hose 5 is not particularly limited as long as it has airtightness and flexibility necessary for inversion described later. The outer surface can be used with a synthetic resin coating. Moreover, although the diameter of the hose 5 depends on the amount of water required in the building 200, for example, a diameter of 200 to 1000 mm is used. Furthermore, since it is necessary to send a large amount of water in a short time, for example, it is preferable to use one having a relatively large diameter of 500 to 1000 mm. In addition, if industrial water is supplied to the building 200, it is preferable to use the hose 5 having a pressure resistance of 1 MPa or more.
Moreover, as a jacket which consists of a cylindrical fabric, the thing of the following specifications can be used.
Warp: Polyester yarn 1220 dtex / 10 yarn x 600 weft yarn: Polyester yarn 1100 dtex / 10 yarn x 2 x 23 P / 10 cm

  Since the hose laying device 1 is a self-propelled type, the hose 5 can be laid by running the hose laying device 1 itself in the site during normal times. However, when a disaster occurs, unevenness of the ground or scattering of rubble occurs in the site, so that it is difficult to allow the hose laying device 1 to enter the site. Keep it. And the hose 5 pulled out from the hose laying apparatus 1 is laid by inverting the front and back as follows.

  In front of the hose laying device 1, a reversing metal fitting 10 for reversing the front and back of the hose 5 drawn from the hose laying device 1 and an air pump 11 for supplying pressurized air for reversal to the reversing metal fitting 10 are installed. .

  FIG. 2 is a diagram showing a state in the middle of laying the hose. Moreover, FIG. 3 is sectional drawing of the hose 5 at the time of inversion. As shown in FIG. 3, the reverse fitting 10 includes a disk-shaped plate member 12 and a cylindrical member 13 connected to the outer peripheral portion of the plate member 12 with a bolt.

  An insertion hole 12 a through which the hose 5 is inserted is formed at the center of the plate member 12. The plate member 12 is also formed with an air inlet 12b connected to the air pump 11. The hose 5 drawn out from the hose laying device 1 is inserted into the insertion hole 12a of the plate member 12 in a state of being flatly folded. Further, the tip of the hose 5 that has passed through the insertion hole 12 a is turned over and fixed to the outer peripheral surface of the cylindrical member 13 with a band 14. In addition, a seal member 15 is attached to the central portion of the plate member 12 to keep the insertion hole 12a and the hose 5 airtight while allowing passage of the hose 5 in the insertion hole 12a.

  As shown in FIG. 3, the sealed space 16 is formed inside the hose 5, the plate member 12, and the cylindrical member 13 in a state where the tip of the hose 5 is turned over and fixed to the cylindrical member 13. When pressurized air is supplied into the space 16 from the air pump 11 connected to the air inlet 12b, air pressure (fluid pressure) acts on the inner side of the tip of the hose 5 turned upside down. Due to the pressure of the air, the front and back sides of the hose 5 are reversed while being drawn out from the insertion hole 12a. At this time, as shown in FIG. 2, the portion where the hose 5 is reversed (the tip portion 5a of the reverse) advances forward.

  In the present embodiment, the hose 5 is laid in the site by utilizing the advance of the tip portion 5a when the hose 5 is turned upside down. That is, as the pressurized air is supplied to the hose 5 and the reversal proceeds, the reversal tip portion 5a advances forward, so that the laying of the hose 5 proceeds naturally.

Next, a series of operations from the laying of the hose 5 in the site to the water supply to the building 200 will be described in order.
First, in order to lay the hose 5 in the site, as shown in FIG. 1, the hose laying device 1 equipped with the reel 3 around which the hose 5 is wound is installed near a water source 100 such as a river or the sea. In addition, lay the hose 5 at a predetermined position in the area where the hose 5 is laid in the site, avoiding large obstacles and rubble (hatched areas in FIG. 1) or large obstacles such as trees. A plurality of guides 20 are installed along the planned installation route. The guide 20 may be installed, for example, by placing a pile on the ground, or by placing water in a factory fixture such as a drum can to increase its weight.

  Next, as shown in FIGS. 2 and 3, the hose 5 is fixed to the reversing metal fitting 10 with the tip end portion turned upside down. Then, while rotating the reel 3 of the hose laying device 1 and pulling out the hose 5 from the reel 3, the pressure of the pressurized air supplied from the air pump 11 reverses the front and back of the hose 5 and advances the inverted tip portion 5 a. Then, laying of the hose 5 is started. In addition, the pressure of the pressurized air supplied to the reverse fitting 10 is determined according to the specification of the hose 5 to be laid. For example, as described above, in the case of a hose having a diameter of 200 to 1000 mm and a pressure resistance of about 1 MPa, the pressure of the appropriate pressurized air is 0.05 to 0.3 MPa. Even a fairly long hose 5 can be laid by inversion.

  In this way, the hose 5 is reversed by reversing the front and back surfaces of the hose 5 with the pressure of the pressurized air, and the reversing tip portion 5a is continuously advanced, so there is no need to pull the hose 5, and the hose There is no need to run the laying device 1 in the laying. Moreover, even if there are unevenness, cracks, debris, or the like on the ground, the hose 5 can be quickly laid over the surface without avoiding unevenness, cracks, or removal of debris. As can be seen from FIGS. 2 and 3, since the non-inverted portion 5b of the hose 5 is fed out inside the inverted portion at the time of reversal, the unreversed portion 5b that is fed out and the ground Friction does not occur between the hose 5 and the hose 5 is less likely to be damaged than when pulled and laid.

  However, there are unavoidable places on the premises, such as large unevenness, cracks, or debris (hatched area in Fig. 1), or various obstacles such as trees and facilities are installed. When it exists, it is necessary to change the laying direction of the hose 5. Even in such a case, the operator can easily change the laying direction of the hose 5 only by changing the direction of the tip portion 5a of the inversion of the hose 5. Moreover, by installing the guide 20 in a predetermined position in the site in advance, the hose 5 can be easily bent when changing the laying direction. Thereby, it becomes easy to lay the hose 5 along a predetermined route while avoiding a portion having a bad ground state, an obstacle, or the like.

  Also, if the hose 5 is laid in the wrong direction because the hose 5 is bent in the wrong position or bent in the wrong direction, the hose 5 is The laying direction can be easily corrected. First, the pressure of the pressurized air is reduced to a pressure that can maintain the expanded state of the hose 5, and the advancement of the reversal tip portion 5a is temporarily stopped (reversal is stopped). Next, the non-inverted portion 5b of the hose 5 is pulled from the reel 3 side to retract the inverted tip portion 5a. And if the front-end | tip part 5a is returned to the position which bends the hose 5, the direction of the front-end | tip part 5a will be changed to the correct direction again in that position, the pressure of pressurized air will be raised, and reversal will be restarted. Thus, even if the hose 5 has been laid in the wrong direction, the direction of laying can be changed by reducing the pressure of the pressurized air and retracting the tip portion 5a of the reversal and then changing the direction. It can be corrected in the right direction.

  Moreover, the hose 5 has flexibility and can be bent or flattened. Therefore, in a place where a large obstacle exists, a large space for laying the hose 5 cannot be secured, and even when there is only a relatively small space, the hose 5 is bent or crushed flatly to make such a small space. By passing through the space, the hose 5 can be laid without avoiding an obstacle.

  In addition, when laying the hose 5 in an environment in which it is difficult for an operator to enter a laying place that is dangerous to human life, using a machine or a robot that runs in parallel with the reversing tip portion 5a, The laying direction of the hose 5 may be changed.

  As described above, it has been difficult to lay the work in the past, such as when the ground condition in the site where there is unevenness, cracks, debris, etc. is bad, or when there are obstacles in the site. However, the hose 5 can be laid easily and quickly. For example, if the laying distance is several hundred meters, it can be laid in several hours, and even if it is several kilometers, it can be laid in a few days.

  Moreover, in this 1st Embodiment, the front and back of the hose 5 are reversed with the pressure of pressurized air. The fluid used for the reversal may be a liquid such as water, but the use of pressurized air does not increase the weight of the hose 5 during the reversal compared to the case where the liquid is used. Therefore, it is easy to handle the hose 5 such as changing the laying direction by changing the direction of the inverted tip portion 5a or lifting when the inverted tip portion 5a is caught by an obstacle or the like.

  When the laying of the hose 5 up to the building 200 is completed as described above, the hose 5 is connected to a water supply pump that draws water from the water source 100. As shown in FIG. 3, the plate member 12 of the reversing metal fitting 10 is connected to the cylindrical member 13 to which the end of the hose 5 is fixed by a bolt, and the plate member 12 is easily detached from the cylindrical member 13. Be able to. Therefore, the plate member 12 can be removed from the cylindrical member 13 while the end of the hose 5 is fixed to the cylindrical member 13, and a metal fitting for connecting to the water supply pump can be attached to the cylindrical member 13 instead. The connection between the hose 5 and the water supply pump is easy. Specifically, for example, as shown in FIG. 4, the submersible pump 17 is connected to the reverse fitting 10. Alternatively, as shown in FIG. 5, a pump car 18 equipped with a submersible pump is connected to the reversing metal fitting 10. Thus, after connecting the hose 5 to the water supply pump, the water from the water source 100 is pumped up by the water supply pump and supplied to the building 200 through the hose 5.

  In the above description, the case where the hose 5 for supplying water to the building 200 is laid is described as an example. However, when a fire occurs in the building 200, a fire hose is laid on the building 200. Can be realized by performing the same operation.

  Next, a modified form of the first embodiment will be described. However, components having the same configuration as in the first embodiment are denoted by the same reference numerals and description thereof is omitted as appropriate.

1] As shown in FIG. 6, a belt 6 longer than the hose 5 is inserted into the hose 5 folded flat, and the belt 6 may be in close contact with the entire length of the hose 5. In this case, when the hose 5 is reversely laid, the operator can reverse the hose 5 while pulling the belt 6, and the reverse tip portion 5 a can be guided in the belt 6 pulling direction. Thereby, the belt 6 can be operated from a place away from the hose 5 to control the direction of the hose 5 (the advance direction of the tip portion 5a) at the time of laying. Further, the reverse speed (that is, the laying speed) of the hose 5 can be controlled by the belt 6. Further, when the tip end portion 5a of the inversion is caught by an obstacle, it is possible to eliminate the caught state by operating the belt 6 up and down or left and right.

  Further, when correcting the laying direction of the hose 5, the reverse tip portion 5a can be easily retracted by pulling the end of the belt 6 on the hose laying device 1 side backward. If the end of the belt 6 on the hose laying device 1 side is fixed to the reel 3, when the hose 5 is pulled out from the reel 3 to some extent, the hose 5 jumps forward by the pressure of the pressurized air. Can be suppressed.

  Similar effects can be obtained by using a wire such as a rope or a wire instead of the belt 6. However, when a wide belt is used, the hose 5 is less likely to be twisted during towing and the frictional force when it is in close contact with the hose 5 is larger than that of a rope or the like. There is an advantage that it is difficult.

2] Two or more hoses 5 can be connected and laid. However, when the state of the ground at the laying place is poor, it is difficult to carry each hose 5 on a truck or the like to the connection position and transport it within the site. Therefore, it is preferable to perform the laying work in the following procedure.

  First, as shown to Fig.7 (a), the end part of two hose 5A, 5B is connected before laying. At this stage, it is not necessary to connect the ends of the two hoses 5A and 5B in an airtight manner, and the connection is such that the other hose 5B can move integrally when one hose 5A moves. I just need it. For example, it is sufficient to connect the two hoses 5A and 5B with a connecting member 30 made of a flexible sheet such as cloth or rubber.

  Next, it fixes to the inversion metal fitting 10 in the state which turned over the end part of one hose 5A, and this one hose 5A is reversed by the pressure of pressurized air. At this time, the connecting portion 5c and the other hose 5B also move with the advancement of the inverted tip portion 5a. Then, as shown in FIG. 7B, when the connecting portion 5c of the two hoses 5A and 5B reaches the reverse tip portion 5a, the supply of pressurized air from the air pump 11 is stopped to stop the reverse. In the cutting line C, the tip portion 5a including the connecting portion 5c is cut and removed. Next, as shown in FIG. 7 (c), the connection fittings 31 and 32 are attached to the ends of the two separated hoses 5A and 5B, and the two hoses 5A and 5B are again connected to the pressurized air. Connect in an airtight manner to prevent leakage. Thereafter, when pressurized air is supplied again from the air pump 11 to the space 16 in the hose 5, the reversal of the other hose 5 </ b> B is started by the pressure of the pressurized air, and the other hose 5 </ b> B is laid.

  As described above, as soon as the laying of one hose 5A is completed, another hose 5B is connected, and a plurality of hoses 5 are connected one after another, thereby enabling laying over a long distance. Further, when one hose 5A is reversed and laid, the hose 5B to be connected next is pulled to the hose 5A and has moved to the connection position. Therefore, the hose 5B to be laid next is separately tracked. There is no need to transport it to the connection position.

3] When laying the hose 5 in a part where the ground condition is bad, such as rubble being scattered at the laying place, cover the nonwoven fabric in advance and lay the hose 5 on it. Damage to the hose 5 can be reliably prevented.

  Moreover, you may make it cover the outer side of the hose 5 with another cylinder for protection (protection cylinder 40). However, it is quite difficult to install a long protective cylinder 40 having a diameter larger than that of the hose 5 and to draw the same long hose 5 into the protective cylinder 40 and insert it. Therefore, for example, the following method is preferably employed.

  As shown in FIG. 8, first, the protective cylinder 40 having a diameter larger than that of the hose 5 is laid while being reversed. That is, the protective cylinder 40 is fixed to the reversing metal fitting 41 with the end portion turned upside down, and laid while the front and back of the protective cylinder 40 are reversed by the pressure of the pressurized air. After laying the protective cylinder 40, inside the protective cylinder 40, the reversing metal fitting 10 is used to reverse the hose 5 with the pressure of the pressurized air so that the reverse tip portion 5 a is advanced, and the protective cylinder 40 is moved forward. Insert inside.

  In this embodiment, the hose 5 is inserted into the protective cylinder 40, whereby the hose 5 is protected by the protective cylinder 40 and the hose 5 is prevented from being damaged. Further, since the protective cylinder 40 is laid while being inverted by the pressurized air, the laying work of the protective cylinder 40 having a diameter larger than that of the hose 5 is facilitated. Furthermore, since the hose 5 is also inserted into the protective cylinder 40 while being reversed by pressurized air, it is very easy to insert the same long hose 5 into the long protective cylinder 40. Become.

  The protective cylinder 40 only needs to have a function of protecting the hose 5. However, if the protective cylinder 40 is laid by reversal with pressurized air as described above, the hose 5 itself is reversed. It is necessary to have at least flexibility and airtightness for preventing pressurized air from leaking. For example, a nonwoven fabric formed into a cylindrical shape by sewing or the like can be suitably used.

4] In the above embodiment, the hose 5 is inverted by the pressurized air. However, the fluid supplied to the hose 5 for the inversion is not limited to gas, and a liquid such as water may be used.

5] The reversing device for reversing the hose 5 is not limited to the reversing metal fitting 10 described above. For example, a large reversing device that accommodates a reel around which the long hose 5 is wound and includes a pressure vessel to which pressurized air is supplied may be used.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. The first embodiment is an example in which the present invention is applied on the assumption that the laying place is a flat ground. However, the second embodiment is an example in which the hose is laid on a steep slope. . More specifically, an example will be given in which drainage hoses are laid in a dammed lake formed by sedimentation that has flowed out due to landslides and the like, and water is dammed up. FIG. 9 is a diagram illustrating a process of laying a drainage hose to a dam lake according to the second embodiment.

  As shown in FIG. 9, earth and sand that have flowed out due to landslides and the like are accumulated to form a bank portion 56, and when the river water is blocked by the bank portion 56, a dam lake 57 is formed on the upstream side of the river. . In the second embodiment, from the opposite side of the levee portion 56 to the dam lake 57 (right side in the figure: hereinafter also referred to as the hem side), it extends along the steep slope of the levee portion 56 beyond the top portion 56a. A hose 55 is laid to the left dam lake 57. At that time, as in the first embodiment described above, the hose 55 is laid along the slope of the bank portion 56 by moving the inverted tip portion 55a while reversing the front and back of the hose 55.

  First, the hose laying device 51 is installed in a relatively flat place on the hem side of the bank portion 56. In the figure, as a hose laying device 51, a self-propelled device having a carriage 52 on which a reel 53 is installed is disclosed as in the first embodiment. Then, the hose laying device 51 rotates the reel 52 to pull out the hose 55 wound around the reel 53.

As the drainage hose 55, as in the case of the water supply hose 5 of the first embodiment, for example, a jacket in which the inner and outer surfaces of a jacket made of a tubular fabric are coated with a synthetic resin can be used. As in the first embodiment described above, a hose having a diameter of 200 to 1000 mm can be used. However, the slope of the bank portion 56 has poor scaffolding and is exemplified in FIG. 7C of the first embodiment. As described above, the operation of connecting the plurality of hoses 55 becomes difficult. Therefore, a long hose is used to reduce the connection operation as much as possible, and a small diameter is adopted. Specifically, those having a diameter of 200 to 400 mm and a pressure resistance of 0.5 MPa can be suitably used. The jacket having the following specifications can be used.
(Diameter: 200mm)
Warp: Polyester yarn 1100T / 3 × 704 Weft: Aramid fiber 1670T / 2 45P / 10cm
(Diameter: 150mm)
Warp: Polyester yarn 1000T / 3 × 656 Weft: Aramid fiber 1670T / 1 61P / 10cm

  Further, near the hose laying device 51, a reversing metal fitting 60 for reversing the front and back of the hose 55 and an air pump 61 for supplying pressurized air to the reversing metal fitting 60 are installed. The reversing metal fitting 60 and the air pump 61 can be the same as those in the first embodiment (see FIGS. 1 to 3).

  The laying of the hose 55 by reversal is the same as in the first embodiment, and thus detailed description is omitted, but is performed as follows. First, the tip of the hose 55 pulled out from the reel 53 is fixed to the reversing metal fitting 60 in an inverted state. Then, while rotating the reel 53 and pulling out the hose 55, the reverse tip portion 55 a is advanced while the front and back of the hose 55 are reversed by the pressure of the pressurized air supplied from the air pump 61. Start. The pressure of the pressurized air supplied to the reversing metal fitting 10 is determined according to the specification of the hose 55. For example, in the case of a hose having a diameter of 200 to 400 mm and a pressure resistance of about 0.5 MPa, the pressure of pressurized air is set to 0.05 to 0.3 MPa, so that the length of the hose 55 is considerably long. Can also be installed by reversing.

  Also in the second embodiment, the hose 55 is laid by moving the front end portion 55a of the reversal while reversing the front and back of the hose 55, so there is no need to pull the heavy hose 55 at the laying location. Moreover, it is not necessary to run the hose laying device 51. Therefore, the hose 55 can be laid easily and quickly even on a steep slope.

  In addition, there are many obstacles such as fallen trees and rocks on the slope of the embankment 56, and there is a possibility that driftwood and the like exist around the dam lake 57. However, in laying by inversion, the hose 55 can be quickly laid over such an obstacle, and the laying operation is facilitated without the need for prior removal of the obstacle. Further, since the non-inverted portion of the hose 55 is drawn out inside the inverted portion and no friction is generated between the hose 55 and the ground, the hose 55 is less likely to be damaged than when pulled and laid.

  If there are obstacles that cannot be overcome, such as trees and large rocks, it is necessary to change the direction in which the hose 55 is laid. In this case, only the direction of the tip 55a of the reversal is changed. It's okay. Here, the change of the laying direction may be performed by an operator entering the laying place, but may be performed by using a robot or the like when the worker is difficult to enter. Further, the hose 55 can be bent or crushed to be flat. Therefore, for example, even when laying in the mountains where trees stand, the hose 55 is flattened and passed through the gaps between the trees, so there is no need to bypass or cut down the trees, thereby reducing the laying time. it can.

  Further, by reversing the hose 55 by the pressure of the pressurized air, the weight of the hose 55 does not increase compared to the case where the pressure of a liquid such as water is used, and the above-described laying direction can be easily changed. . Further, when the inverted tip portion 55a is caught by an obstacle, it can be easily lifted to cancel the state. Furthermore, in this second embodiment, since the hose 55 is laid along the slope of the levee portion 56, if a liquid is used, the head pressure on the hem side when laying upward along the slope toward the top portion 56a. Therefore, it is necessary to boost the pressure by the pump. In this regard, if pressurized air is used, the water head pressure does not act, so even a small air pump 61 can be reversed and laying becomes easy.

  FIG. 10 is a diagram illustrating a draining process after the hose is laid. In parallel with the laying of the drainage hose 5 described above, the drainage pump 58 is conveyed to the dam lake 57. When the laying of the hose 55 is completed, as shown in FIG. 10, a drainage pump 58 is connected to the hose 55, and the water of the dam lake 57 is pumped up by the drainage pump 58. Drain to the hem side.

  More specifically, first, as shown in FIG. 10, the end of the hose 55 is removed from the reversing metal fitting 60 on the skirt side of the bank portion 56. And the edge part of the removed hose 55 is put in the drainage basin 59 connected to the river (illustration omitted).

  Moreover, a submersible pump can be adopted as the drain pump 58 installed on the dam lake 57 side. In this case, a drainage pump 58 is connected to the end of the hose 55 on which the laying has been completed on the side of the dam lake 57, and the drainage pump 58 is submerged in the dam lake 57 to pump up the water in the dam lake 57. . In addition, as shown in FIG. 10, the drain pump 58 is connected to the embankment portion 56 by a wire 63 or the like so that the drain pump 58 does not sink deeply in the dam lake 57 or flow away far. It is preferable to keep it. The water pumped up from the dam lake 57 by the drainage pump 58 is discharged to the drainage basin 59 installed on the skirt side through the hose 55 and further flows into the river. As described above, if a submersible pump that is submerged in the dam lake 57 is used as the drain pump 58, it is not necessary to install the drain pump 58 near the dam lake 57 or on the embankment 56. Even when it is difficult to secure the installation location of the pump 58, it is possible to pump water from the dam lake 57.

  In addition, after removing the reversing metal fitting 60 from the hose 55 that has been laid, by connecting the end of another hose 55 to this reversing metal fitting 60, a plurality of hoses 55 can be continued using the same reversing metal fitting 60. May be laid. Thereby, a plurality of hoses 55 can be laid with one reversing metal fitting 60. And by laying a plurality of hoses 55 and draining simultaneously, the amount of drainage from the dam lake 57 is increased, and the water level of the dam lake 57 can be lowered quickly. Further, by repeatedly using the same reversing metal fitting 60, it is only necessary to carry one reversing metal fitting 60 to the site in order to lay a plurality of hoses 55.

  Next, a modified form of the second embodiment will be described. However, components having the same configuration as in the second embodiment are denoted by the same reference numerals and description thereof is omitted as appropriate.

1] Similar to the modification to the first embodiment, in the second embodiment, a belt may be inserted into the hose 55 in advance, and the hose 55 may be reversed while being pulled by the belt. In particular, in this second embodiment, when the hose 55 is laid upward along the slope from the skirt side to the top portion 56a of the levee portion 56, the belt is pulled from the top portion 56a side, thereby reversing the hose 55. It can assist that the front-end | tip part 55a reaches | attains the top part 56a against gravity. In order to pull the belt from the top 56a of the bank portion 56, it is necessary to pass the end of the belt from the hem side to the top 56a before laying the hose 55. This can be done easily by using a rescue rope firing gun that is used when laying over a certain place.

2] From the viewpoint of ease of transportation to the dam lake 57, it is preferable to use a small submersible pump, but a small submersible pump has a disadvantage that the amount of drainage is small. Therefore, as shown in FIG. 11, a plurality of drainage pumps 58 (submersible pumps) may be connected to the end of one hose 55 laid up to the dam lake 57 via a connector 65. In this way, by connecting a plurality of drainage pumps 58 to one hose 55, a small submersible pump is adopted as each drainage pump 58, and the entire drainage amount is secured to a certain level or more, and the dam lake The water level of 57 can be lowered early.

3] The drainage pump 58 is not limited to the submersible pump used by being submerged in the dam lake 57, and may be installed on land. For example, as shown in FIG. 12, a drainage pump 58 is installed at the top 56a of the bank portion 56, and this drainage pump 58 is laid from the bottom 56a to the top 56a, and from the top 56a to the dam lake 57. The hose 55B may be connected to each other.

4] In addition, similarly to the first embodiment, in the second embodiment, a plurality of hoses 55 are connected and laid (see FIG. 7), and a protective cylinder that protects the hoses 55 is laid first ( A change such as using a liquid such as water for the inversion of the hose 55 may be added.

  As described above, as an embodiment of the present invention, when a water supply hose is laid in a factory building at the time of a disaster (first embodiment) and when a drainage hose is laid in a dam lake (second embodiment) Although examples in which the invention is applied are given, the present invention can be applied in situations other than these. For example, when drainage hoses are laid in flooded areas during river flooding, or when fire hoses are laid in mountainous areas in the event of a wildfire, laying work is difficult due to poor conditions at the laying site. It is particularly desirable to apply to the extreme case.

5 Hose 5a Tip part 5b Non-inverted part 6 Belt 10 Reversing metal fitting 20 Guide 40 Protection cylinder 55 Hose 60 Reversing metal fitting

Claims (5)

A method of laying a hose at a laying place where an obstacle exists,
Placing the hose on one of the water source and destination,
Install a guide at a predetermined position of the laying place,
Fixed upside down one end of the hose,
While reversing the front and back of the hose by applying pressurized air to the inside of the inverted part of the hose, reversing the obstacle while changing the direction by the guide, A hose laying method , wherein the hose is laid from the one of the water source and the water destination to the other by advancing while avoiding an obstacle . Connecting the two hoses,
One hose is advanced with the tip of the reversal while reversing the front and back with pressurized air ,
When the connecting portion between the one hose and the other hose reaches the tip of the reversal, the reversal of the one hose by pressurized air is stopped, and then the tip of the reversal is cut. Disconnect the two hoses,
After connecting the separated ends of the two hoses so that the fluid does not leak when the pressurized air acts in the hoses,
The method for laying a hose according to claim 1 , wherein the reversal of the other hose is started by the pressurized air . First, lay a protective cylinder with a larger diameter than the hose while inverting the front and back with pressurized air ,
3. The hose according to claim 1, wherein, after laying the protective cylinder, the hose is inserted into the protective cylinder inside the protective cylinder while inverting the front and back with pressurized air. Laying method. A belt is inserted through the hose before inversion,
The laying of the hose according to any one of claims 1 to 3 , wherein the front end of the hose is reversed while pulling the belt to guide the reverse tip portion in the pulling direction of the belt. Method. Pulling the non-inverted portion of the hose from the once stopping the inversion of the hose, according to claim 1-4 in which after retracting the tip portion of the inverted, and changes the orientation of the tip portion of the inversion The hose laying method according to any one of the above.