JP4318345B2 - Laying plastic pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic pipe laying method suitable for connecting a plastic pipe in order to construct a pipeline for circulating water, sewage, hot spring, mud, and the like.
[0002]
[Prior art]
Conventionally, metal pipes such as cast iron pipes and steel pipes have been used as transport pipes for distributing water, sewage, hot springs, mud water, and the like because of their high strength. Such a transport pipe is used for a long period of 30 years or 40 years unless particularly damaged or ruptured.
However, metal pipes such as cast iron pipes and steel pipes are prone to corrode on the inner wall surface due to water, sewage, hot springs, mud water, etc. circulating in the pipe, and the outer wall surface is easily corroded by rainwater, chemical substances, etc. is there. Moreover, since specific gravity is large and it does not have flexibility, there also exists a problem that laying work requires a lot of time and labor.
Therefore, in recent years, plastic tubes made of vinyl chloride, phenol, polyethylene, etc. have been used to solve such problems.
[0003]
Pipes that circulate water, sewage, hot springs, muddy water, etc. are constructed by connecting a large number of such plastic pipes. In the case of plastic pipes, flanges are formed and fastened with bolts and nuts. Since this is not suitable in terms of strength, the end faces of the plastic tubes are usually bonded by heat-sealing. As a joining method by such heat fusion, a butt fusion method using a butt fusion apparatus 1 as shown in FIG. 1 is known.
In the butt fusion method, the end portions of the plastic tubes 2a and 2b are fixed and supported in advance on the fixed support portion 4 or the movable support portion 5 of the movable pressing mechanism 3. First, the heater plate 6 is lowered, the heater surfaces 6a and 6b are brought into contact with the end surfaces of the plastic tubes 2a and 2b, and the ends thereof are melted. Next, the heater plate 6 is raised, the movement support portion 5 is slid, the end faces of the plastic tubes 2a and 2b are brought into contact with each other, and pressed with a predetermined pressure for a predetermined time, thereby joining the plastic tubes 2a and 2b. .
[0004]
In order to configure the pipe line by the butt fusion method, first, the plastic pipe 2b is transported to the installation location, the butt fusion apparatus 1 is moved to the joining position, and the end faces of the plastic pipes 2a and 2b are moved to each other as described above. Join by heat sealing. Next, the plastic pipe 2c is transported to the installation location, the butt fusion apparatus 1 is moved to the joining position, and the end faces of the plastic pipes 2b and 2c are thermally fused to be joined. Thereafter, by repeating the same operation, the plastic pipes 2a, 2b, 2c,.
[0005]
[Problems to be solved by the invention]
However, when plastic pipes are laid in a tunnel with a relatively small diameter formed in the ground, transportation such as dump trucks that transport plastic pipes, truck cranes that move up and down, forklifts that move butt fusion devices, etc. Since cars and work vehicles cannot be carried into the tunnel, workers had to transport and move plastic tubes and butt fusion devices exclusively by human power. Therefore, a great deal of labor and time was required for the laying work, and the work efficiency was extremely poor.
[0006]
The present invention has been made to solve such conventional problems, and its object is to reduce and shorten the labor and time required for laying plastic pipes and to improve work efficiency. It is intended to provide a plastic pipe laying method that can be used.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the plastic pipe laying method of the present invention carries the plastic pipe placed on the automatic conveyance vehicle to the connection place of the plastic pipe waiting for the fusion carriage on which the butt fusion device is installed, After connecting the automatic conveyance vehicle and the fusion carriage, the automatic conveyance vehicle is moved so that one end of the already connected plastic pipe comes to the installation position of the butt fusion device, and the plastic pipe that has been conveyed is the fusion carriage. The plastic pipes are sequentially connected to each other by repeating the same operation by bringing the plastic pipes into close proximity to one end of the already connected plastic pipes and joining the plastic pipes with a butt fusion device. It is characterized by constituting a road.
[0008]
After moving the plastic tube that has been transported to the fusing trolley, the automatic conveyance vehicle and the fusing trolley are separated from each other, and the automatic conveyance vehicle returns to the place where the plastic tube is placed while the plastic tubes are being joined together. By doing so, the plastic pipe to be joined next can be placed on the automatic transport vehicle while the joining work is being performed on the fusion carriage, so that the time required for the laying work can be further shortened.
[0009]
In addition, if a plurality of rollers are rotatably arranged at predetermined intervals in the length direction on the upper surface of the automatic conveyance vehicle and the fusion carriage, and the plastic pipe is supported on these rollers, the automatic conveyance vehicle is simply moved. Then, one end of the already connected plastic tube can be brought to the installation position of the butt fusion device, and the operator can move it onto the welding carriage by simply pressing the plastic tube carried by the operator. Since it can be made to adjoin to the end of a plastic pipe, an operator's labor can be reduced significantly and it is preferable.
[0010]
Furthermore, a plurality of rows in the width direction and a plurality of rollers are rotatably arranged at predetermined intervals in the length direction on the upper surface of the automatic conveyance vehicle and the fusion carriage, and the position is shifted in the length direction on the upper surface of the fusion carriage. If a plurality of butt fusing devices are installed, it is not necessary to move one butt fusing device at a time, and a plurality of plastic pipes can be joined substantially simultaneously, greatly increasing the time required for the joining operation. This is preferable because it can be shortened.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a case where the plastic pipe laying method of the present invention is applied to a tunnel as shown in FIGS. 2 to 4 will be described.
In addition, since this invention employ | adopts the joining method by heat sealing | fusion, the plastic tube used as object is thermoplastic resin pipes, such as a vinyl chloride and polyethylene.
[0012]
As shown in FIGS. 2 and 3, the tunnel 7 is located at a depth (D) of about 15 m from the ground surface and is a distance of about 900 m in length (L) along the main road 8 by a shield method. And one end of which is open to the shaft 9, and the other end is closed.
As shown in FIG. 4, the tunnel 7 has an inner diameter (Φ) of about 2.8 m shielded by a steel segment 10, and has a large-diameter FRPM pipe 11 (inner diameter φ2.2 m), a small-diameter Two kinds of plastic pipes 12 and 13 (inner diameter φ300 mm, φ350 mm) are laid, and finally air mortar 14 is injected and fixed.
[0013]
Pipelines configured by connecting the FRPM pipes 11 are connected to drainage through holes 15, 15, 15 that open to the surface of the ground at appropriate places. When raining, a large amount of rainwater is collected to the treatment facility 16. In addition to facilitating drainage of rainwater, a proper amount of rainwater is stored during normal times to ensure water for fire extinguishing in the event of a disaster.
The pipe line constituted by connecting the plastic pipes 12 and 13 is for supplying circulating water to be flowed in the FRPM pipe 11 in a timely manner in order to prevent the rainwater stored in the FRPM pipe 11 from being spoiled. is there.
[0014]
The plastic pipe laying method of the present invention is applied when a large number of these plastic pipes 12 and 13 are connected in the tunnel 7 to form a pipe line.
Hereinafter, the plastic pipe laying method will be described in detail with reference to the work procedure.
[0015]
As shown in FIG. 3, after the tunnel 7 is formed, rails 17 are laid in the shaft 9 and over the entire length of the tunnel 7. The tower crane 18 installed on the ground surface suspends the automatic transport vehicle 19, the auxiliary cart 20, and the fusion cart 21 to be lowered into the shaft 9 and wheels (not shown) on the rail 17 in the shaft 9. Is placed so as to be movable along the rail 17.
[0016]
As shown in FIG. 5, the automatic transport vehicle 19 includes a drive control unit 22 and a mounting carriage unit 23. The drive control unit 22 incorporates a battery, and includes a drive mechanism such as a motor and a speed reduction mechanism, a control stick, and a brake. The operator's seat is defined. The mounting carriage unit 23 rotatably arranges a plurality of rollers 25, 25,..., 26, 26,... On the upper surface of the mounting table 24 in the width direction and at predetermined intervals in the length direction. A connector 27 is disposed at one end of the mounting table 24.
[0017]
As shown in FIG. 5, the auxiliary carriage 20 has a plurality of rollers 29, 29,..., 30, 30,. The connectors 31 and 32 are disposed at both ends of the mounting table 28.
[0018]
As shown in FIG. 5, the fusion carriage 21 has a plurality of rollers 34, 34,..., 35, 35,. The connector 36 is disposed at one end of the mounting table 33.
Furthermore, on the upper surface of the mounting table 33, two butt fusion devices 37, 38 are disposed in the length direction between the appropriate rollers 34, 34 and between the appropriate rollers 35, 35 in the respective roller rows. It is installed.
[0019]
Further, from the side closer to the closed end of the tunnel 7, the fusing cart 21, the auxiliary cart 20, and the automatic transport vehicle 19 are arranged in this order, and the coupler 36 of the fusing cart 21 and the coupler 32 of the auxiliary cart 20 are preliminarily arranged. And the fusing cart 21 and the auxiliary cart 20 are moved together.
[0020]
The fusing trolley 21 and the auxiliary trolley 20 are propelled by the automatic transport vehicle 19 and are kept waiting at the place where the plastic pipes 12 and 13 are connected in the tunnel 7. Walking in the tunnel 7 and waiting near the connection place.
On the other hand, the automatic transport vehicle 19 is kept waiting in the shaft 9, and the driver of the automatic transport vehicle 19 is waiting near the automatic transport vehicle 19.
[0021]
First, as shown in FIG. 3, the plastic pipes 12b and 13b (length 6 m) are suspended by the tower crane 18 and lowered into the shaft 9, and the automatic transport vehicle 19 is placed as shown in FIG. The plastic tube 12b is mounted on the rollers 25, 25,... Of the carriage unit 23, and the plastic tube 13b is mounted on the rollers 26, 26,.
The plastic pipes 12 and 13 are suspended and moved by the crawler crane 41 from the dump truck 39 that has been loaded or from the material storage place 40 that is stored, and are placed on the ground surface in the vicinity of the tower crane 18. .
[0022]
Next, the driver who has been waiting in the seat of the drive control unit 22 of the automatic transport vehicle 19 gets in, drives the automatic transport vehicle 19 as shown in FIG. 7, enters the tunnel 7 from the open end, Proceeding through the tunnel 7, as shown in FIG. 5 (A), it reaches a connection place where the fusion carriage 21 and the auxiliary carriage 20 are on standby.
[0023]
When the connection place is reached, the driver connects the coupler 27 of the automatic transport vehicle 19 and the coupler 31 of the auxiliary carriage 20 as shown in FIGS.
Then, as shown in FIG. 5C, the driver slowly retracts the automatic transport vehicle 19 so that one end of the already connected plastic tube 12a is at the installation position of the butt fusion device 37, and the plastic tube 13a. One end of the butt is brought to the installation position of the butt fusion device 38.
[0024]
Next, as shown in FIG. 5 (C), the waiting worker pushes the plastic pipes 12b and 13b placed on the placing carriage unit 23, and the rollers 29, 29 and 30, 5 and further moved onto rollers 34, 34,..., 35, 35,... Of fusion carriage 21, and one end of plastic tubes 12b, 13b is moved as shown in FIG. The plastic pipes 12a and 13a are respectively brought close to one end.
[0025]
Thereafter, as shown in FIG. 5 (E), the driver separates the coupler 27 of the automated guided vehicle 19 and the coupler 31 of the auxiliary cart 20 and drives the automated guided vehicle 19 to move inside the tunnel 7. Retreat and retreat into the shaft 9 from the open end.
[0026]
On the other hand, at the connecting place, as shown in FIG. 9, the operator fixes and supports the end of the plastic tube 12a to the fixed support portion 4 of the moving press mechanism 3 and the end of the plastic tube 12b to the move support portion 5. To do. Then, the heater plate 6 is lowered, the heater surfaces 6a and 6b are brought into contact with the end surfaces of the plastic tubes 12a and 12b, and the end portions thereof are melted. Next, the heater plate 6 is raised, the movement support portion 5 is slid, the end faces of the plastic tubes 12a and 12b are brought into contact with each other, and pressed with a predetermined pressure for a predetermined time, thereby joining the plastic tubes 12a and 12b.
Similarly, the plastic tubes 13a and 13b are also joined.
[0027]
Thereafter, by repeating the same operation, the plastic pipes 12a, 12b, 12c,... And the plastic pipes 13a, 13b, 13c,.
[0028]
In the plastic pipe laying method of the present invention, the plastic pipes 12b and 13b are transported by the automatic transport vehicle 19 that automatically travels, and the plastic pipes 12b and 13b are moved to the welding carriage 21 in which the butt fusion devices 37 and 38 are installed. Since the plastic pipes 12b and 13b are joined together, it can be applied to a relatively small-diameter tunnel 7, which greatly reduces and shortens labor and time required for laying work, and greatly improves work efficiency. be able to.
[0029]
In addition, since the couplers 27 and 36 are disposed on the automatic carriage 19 and the fusion carriage 21 so that both can be freely connected to each other, the automatic carriage 19 can be connected to the fusion carriage 21 during the joining operation. The plastic pipes 12c and 13c to be joined next can be placed by returning to the standing hole 9, and also in this respect, the time required for laying work can be shortened.
[0030]
Further, a plurality of rollers 25, 25,..., 26, 26,..., 34, 34,. 35,... Are rotatably arranged, so that the end of the already connected plastic pipe 12a can be brought to the installation position of the butt fusion device 37 only by slowly retracting the automatic conveyance vehicle 19. In addition, the operator can lightly push the plastic tube 12b and move it onto the fusion carriage 21 so as to be close to one end of the plastic tube 12a, thereby greatly reducing the labor of the operator.
[0031]
In addition, since the two butt fusing devices 37 and 38 are installed on the upper surface of the fusing carriage 21 while shifting the position in the length direction, it is not necessary to move one butt fusing device one by one. The plastic tubes 12a and 12b can be joined substantially simultaneously, and the time required for the joining work can be greatly shortened.
[0032]
At the closed end of the tunnel 7, as shown in FIG. 10, one end of the plastic pipes 12o, 13o is fixed to a predetermined position of the closed end. As the plastic pipe 12o, for example, a pipe having a length of 2 m shorter than usual is used. use.
As a result, the positions of the other ends of the plastic pipes 12o and 13o are shifted, so that the positions of the ends of the plastic pipes 12 and 13 to be connected thereafter, and the joining positions of the plastic pipes 12 and 13 are shifted, and are fused. It becomes possible to efficiently use the two butt fusion devices 37 and 38 installed on the carriage 21 at different positions.
[0033]
In the above embodiment, two roller rows are formed on the upper surfaces of the automatic conveyance vehicle 19 and the fusion carriage 21 and the two butt fusion devices 37 and 38 are installed on the upper surface of the fusion carriage 21. One roller row may be formed and one butt fusing device may be installed. Conversely, three or more roller rows may be formed and three or more butt fusing devices may be installed. Good.
[0034]
In the above embodiment, in consideration of ease of handling and the like, the automatic guided vehicle 19 is built in a battery and driven by a motor. However, the automatic guided vehicle 19 may be driven by an engine, and may be anything as long as it automatically runs. A drive source may be employed.
The auxiliary cart 20 is used in consideration of easiness of raising and lowering by the tower crane 18. However, depending on the length of the plastic pipes 12 and 13 and the length of the fusion cart 21, the auxiliary cart 20 is used. You don't have to.
In addition, rails 17 for rolling the wheels in the shaft 9 and the tunnel 7 are laid. However, guide rails that contact the side surfaces of the automatic transport vehicle 19, the auxiliary cart 20, and the fusion cart 21 may be used, and other guidance is provided as appropriate. It may be an orbit.
[0035]
The plastic pipe laying method of the present invention is most effective when applied to laying a plastic pipe in a relatively small-diameter tunnel formed in the ground, but in a long groove formed on the ground surface, It is also effective when applied to a case where a plastic pipe is laid directly on the ground surface.
Of course, the use, diameter, length, and the like of the tunnel 7 and the plastic pipes 12 and 13 are not limited to the above embodiment.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a method of joining plastic pipes with a butt fusion apparatus.
FIG. 2 is a plan view showing the positional relationship of tunnels to which the plastic pipe laying method of the present invention is applied.
3 is a cross-sectional view of the vicinity of the opening end of the tunnel shown in FIG. 2. FIG.
4 is a cross-sectional view showing the structure of the tunnel shown in FIG. 2. FIG.
FIG. 5 is a plan view showing an execution procedure of the plastic pipe laying method according to the present invention.
FIG. 6 is an explanatory view showing a state in which a plastic tube is placed on the automatic conveyance vehicle.
FIG. 7 is an explanatory view showing a state in which the automated guided vehicle enters the tunnel from the opening end.
FIG. 8 is an explanatory diagram showing a state in which the automatic transport vehicle is connected to an auxiliary cart.
FIG. 9 is an explanatory view showing a state in which a plastic pipe joining operation is being performed in the fusion carriage.
10 is an explanatory view showing a state in which a plastic pipe is fixed to the closed end of the tunnel shown in FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 12, 13 Plastic pipe 19 Automatic conveyance vehicle 21 Fusing cart 25, 26 Roller 27 Coupler 34, 35 Roller 36 Coupler 37, 38 Butt fusion device

Claims (4)

Place the plastic tube on the automatic conveyance vehicle to the plastic tube connection place where the fusing trolley with the butt fusing device stands by, and move the automatic conveyance vehicle after connecting the automatic conveyance vehicle and the fusing trolley. Then, the end of the already connected plastic tube is brought to the position where the butt fusion device is installed, and the conveyed plastic tube is moved to the welding carriage so that the one end is connected to one end of the already connected plastic tube. A plastic pipe laying method characterized in that plastic pipes are joined together by connecting them with a butt fusion device and repeating the same operation to form a pipe line by sequentially connecting the plastic pipes. After moving the plastic tube that has been transported to the fusing trolley, the automatic conveyance vehicle and the fusing trolley are separated from each other, and the automatic conveyance vehicle returns to the place where the plastic tube is placed while the plastic tubes are being joined together. The method for laying a plastic pipe according to claim 1, wherein: A plurality of rollers are rotatably arranged at predetermined intervals in the length direction on the upper surfaces of the automatic conveyance vehicle and the fusing cart, and a plastic tube is supported on these rollers. The plastic pipe laying method described. A plurality of rollers in the width direction and a plurality of rollers are rotatably arranged at predetermined intervals in the length direction on the upper surface of the automatic conveyance vehicle and the fusing cart, and a plurality of bases are shifted in the length direction on the upper surface of the fusing cart. 4. The method of laying a plastic pipe according to claim 1, wherein a butt fusion apparatus is installed.

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