JPH0811988B2 - GFRP heat conduit installation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to GFRP (Glass Fis
ber Reinforced Plastics) as a constituent material of the heat pipe.

[0002]

2. Description of the Related Art Conventional heat conduits are made of steel tubes, and their joining is also based on welding.

[0003]

However, if the steel pipe is used and the joining method by welding is adopted, there are the following problems. First of all
In addition, since hot water always flows inside the heat pipe, rusting is unavoidable, and stress corrosion cracking and the like particularly occur at the welded portion, which is a problem in terms of durability. Secondly, the weight of steel pipe is large, so the labor required for construction is
There are many facilities and equipment, and handling and transportation are not easy. Third
In terms of construction accuracy, it was not easy to ensure linearity by joining by welding. Therefore, it is desirable to replace the steel tube itself with another material. As a candidate, a heat conduit composed of GFRP, which is excellent in terms of corrosion resistance and strength, can be proposed. In that case, how is it constructed? In addition, how to process the joint to secure the construction accuracy becomes a problem.

[0004]

The present invention has been made in view of such a point, and is easy to install and handle.
In addition, a method of laying a GFRP heat pipe that can easily secure the construction accuracy is provided to solve the problem.

Therefore, in the present invention, in the existing pipeline buried between the start-side shaft and the arrival-side shaft, the GFRP is tapered so that the outer diameter near both ends becomes smaller toward the ends. A GFR having a configuration in which a heat pipe made of steel is pushed into the existing pipe line, and then the inner periphery of the vicinity of both ends is taper-processed so that the ends of the heat pipe are closely fitted.
In a laying method in which a joint pipe made of P is pushed into the existing pipeline, and thereafter, the heat conduit and the joint pipe are alternately pressurized and propelled to replenish them, the heat conduit pushed into the existing pipeline Between the front end of the and the support plate provided facing the opening of the existing pipeline in the reaching side vertical shaft, a support shaft corresponding to the two axial lengths of the heat conduit and the joint pipe was connected. A plurality of connecting rows are arranged at equal intervals on a concentric circle centered on the axis of the existing pipeline to be supported, and the supporting plate is provided by a reaction force receiving device jack provided on the reaction table of the reaching side vertical shaft. While pressing the heat pipe toward the opening, the heat conduit and the joint pipe are pressed into the existing pipe line by the expandable propulsion jack fixed to the propulsion stand provided in the starting side vertical shaft, and the heat pipe and the joint pipe are pressed. Is a number of suitable lengths that are tensioned between the propulsion table and the reaction table. While pressing and propelling along the guide shaft to which the shaft is connected, the support shaft is removed in the reaching side shaft according to the length of the thrust of these heat conduit and joint pipe, and the heat conduit and joint pipe A method of joining the close contact portions with an adhesive was adopted.

Further, in the existing pipeline buried between the start-side shaft and the arrival-side shaft, a heat pipe made of GFRP which is tapered so that the outer diameter near the ends becomes smaller toward the ends. Into the existing pipeline, a GFRP joint pipe having a configuration in which the ends of the heat conduits are closely fitted in the inner circumference of both ends is tapered by itself. In the laying method, in which the heat conduit and the joint pipe are alternately pressurized and propelled alternately to join them, the reaction force receiving force provided on the side opposite to the existing pipeline of the propulsion platform installed on the starting side vertical shaft is pushed. A guide in which a large number of shafts of appropriate length that are tensioned between the support plate provided on the jack of the device and the reaction plate that abuts the front end of the heat conduit pushed into the existing pipeline are connected. Extending the jack of the above reaction force receiving device by providing a shaft While pulling the reaction force plate rearward through the support plate and the guide shaft, by pressing the extendable propulsion jack provided on the existing pipeline side of the propulsion base, the heat pipe is connected to the heat pipe along the guide shaft. It is possible to provide a method in which the joint pipe is pressurized and propelled into the existing pipe line, and the heat pipe and the joint portion of the joint pipe are joined by an adhesive.

[0007]

According to the present invention, the heat propelling jack and the joint duct are pressurized and propelled in the existing pipeline by the telescopic propelling jack provided in the vertical shaft on the starting side, and the two are taper-fitted to each other. The heat conduit can be laid by simply pressing and pushing. Moreover, since it is propelled along the guide shaft, it is easy to ensure linearity. Furthermore, the connecting heat pipe and the joint pipe are propelled while being pressed from the front by the support shaft, so that the joining is ensured by the propulsion, and the reaching side vertical shaft depends on the length of the propulsion of the heat pipe and the joint pipe. By further removing the support shaft, the heat conduit can be reliably laid.

The invention according to claim 2 has the same function as the invention according to claim 1 described above, only by providing all of the various equipment required for construction in the vertical shaft on the starting side.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side sectional view of a heat pipe 1 made of GFRP used in the embodiment. Three
Are each tapered so that the diameter becomes smaller toward the ends.

FIG. 2 also shows a side cross section of a joint pipe 4 made of GFRP. The joint pipe 4 has a shape and a size that fit into the outer circumferences of both ends of the heat conduit 1, and the inner circumferences 5 and 6 of both ends are the above-mentioned heat The conduit 1 is tapered so that the inner diameter becomes larger toward the ends so as to match the outer circumference in the vicinity of both ends of the conduit 1.

Next, the construction procedure of the first embodiment will be described with reference to FIGS. 3 to 9. In FIG. 3, 7 is a start side shaft, 8 is a reach shaft, and 9 are these start shafts. 7, a fume pipe already buried between the reaching shafts 8. Then, first, the support shafts 10 and 11 which can be freely connected are alternately connected and inserted into the fume tube 9. The axial lengths of the support shafts 10 and 11 are respectively the heat conduit 1,
It corresponds to the axial length of the joint pipe 4. In FIG. 3, the connecting rows of the support shafts 10 and 11 are two in the upper and lower sides for convenience of description, but in reality, three or more connecting rows are arranged at equal intervals on a concentric circle centered on the axis of the fume tube 9. It is installed in.

A reaction force table 12 is installed in the arrival side vertical shaft 8, and a reaction force receiving device 13 is provided on the reaction force table 12. The reaction force receiving device 13 has a jack portion 14 which is expandable and contractible in the axial direction, a support plate 15 is provided at the tip of the jack portion 14, and the jack portion 14 is configured to be fixed at an arbitrary position. Have And fume tube 9
The above-mentioned support shaft 10 that has passed through the perforated plate 16 installed at the exit side vertical shaft 8 side exit is supported by the support plate 15 of the reaction force receiving device 13. In addition, a reaction plate 17 is provided at an end portion of the support shaft 10 connected to the start side vertical shaft 7 side.
Is supported.

On the other hand, a propulsion table 18 is installed in the vertical shaft 7 on the starting side, and a center hole type propulsion jack 19 is provided on the propulsion table 18. A pressure jig 20 is fixed to the tip of the propulsion jack 19.
Has a form for receiving the ends of the heat pipe 1 and the joint pipe 4.

A guide shaft 21 is bridged between the reaction table 12 in the reaching side shaft 8 and the propulsion table 18 in the starting side shaft 7. The guide shaft 21 is configured by connecting a large number of shafts having an appropriate length, and a tightening jig 22 is provided at one end portion of the guide shaft 21 on the side of the propulsion base 18, whereby the guide shaft 21 and the propulsion base 18 are connected. It can be tensioned with the reaction table 12.

After the various devices have been set as described above, first the heat conduit 1 at the beginning is put in the vertical shaft 7 on the starting side, and the guide shaft 21 is disconnected by the required length and removed. The heat conduit 1 is set on the pressure jig 20 of the propulsion jack 19. And as shown in FIG. 4, the propulsion jack 1
At 9 the pressure jig 20 is pushed into the fume tube 9 and, at the same time, the jack portion 14 of the reaction force receiving device 13 is retracted.

When the heat conduit 1 of a predetermined length is thus propelled, the retreat of the jack portion 14 of the reaction force receiving device 13 is stopped and, as shown in FIG.
Are retreated, and the support shafts 10 and 10 are respectively propelled and removed. Further, the tightening jig 22 is removed to remove the guide shaft 21.
While releasing the tension, the guide shaft 21 is removed by the length of the joint pipe 4 to be propelled next behind the heat conduit 1.

The jack portion 14 of the reaction force receiving device 13
To the fume tube 9 side again to bring the support plate 15 into contact with the perforated plate 16. After that, the joint pipe 4 is set on the pressurizing jig 20 and adhered to the outer periphery of the end of the heat pipe 1 that has already been propelled on the starting side shaft 7 and the tapered portion of the inner periphery of the end of the joint pipe 4 on the propulsion direction side. The agent is applied and, as shown in FIG. 7, the joint pipe 4 is propelled by the propelling jack 19 until the tapered portions at both ends are in close contact with each other.

After the close contact, the far infrared heater 23 is attached to the outer periphery of the joint portion of the joint pipe 4 (the one-dot chain line portion in FIG. 7) as shown in FIG. The far-infrared heater 23 has a structure in which it can be split into two and rotated by a hinge mechanism, and can be mounted and fixed to the outer periphery of the joint pipe 4 by a fixing metal fitting 24 after mounting. After mounting, the far infrared heater 23 is operated to accelerate the solidification of the adhesive.

After that, when the fixing by the adhesive is completed, the joint pipe 4 is further propelled by the propelling jack 19 and the jack portion 14 of the reaction force receiving device 13 is retracted as shown in FIG. The jack portion 14 is stopped at the time of propelling, and only the propulsion by the propelling jack 19 is continued to strengthen the fitting between the heat conduit 1 and the joint pipe 4.

If such a process is repeated alternately for the heat conduit 1 and the joint pipe 4, and the heat conduit 1 is added to the inside of the fume pipe 9, the heat conduit made of GFRP can be laid inside the fume pipe 9. It is a thing.

Thus, the mutual connection of the heat conduits 1 and 1 is based on the joint pipe 4 fitted to the outer periphery thereof, and the connection is completed only by propulsion and pressurization, so that the construction is extremely simple. Moreover, since the pressure is propelled along the guide shaft 21, it is easy to secure the linearity of the heat conduit to be laid and the construction accuracy is high. The guide shaft may be provided in multiple rows.

Next, the second embodiment will be described with reference to FIGS.
Describing on the basis of the above, in the first embodiment, the propulsion reaction force is applied to the reaction force base 12, but in the present embodiment, the propulsion reaction force is
It is a construction method that goes directly to the vertical shaft on the starting side through the guide shaft.

That is, in FIG. 10, a propulsion stand 32 is installed in the vertical shaft 31 on the starting side, a propulsion jack 34 is provided on the existing fume pipe 33 side of the propulsion stand 32, and a pressure jig 35 is provided at the tip thereof. On the other side of the propulsion table 32, a reaction force receiving device 36 is installed coaxially with the propulsion jack 34. The jack portion 41 of the reaction force receiving device 36 is the same as in the first embodiment.
It has a configuration that can be stopped at any position.

Then, the reaction force plate 37 is inserted into the fume tube 33, and the reaction force plate 37 and the support plate 38 of the reaction force receiving device 36 are inserted.
, A guide shaft 39 that can be connected is connected, and a pressure jig 35 is inserted and passed therethrough. A tightening jig 40 is provided on the support plate 38 to lock one end of the guide shaft 39. The guide shaft 39 thus passed can be tightened by a tightening jig 40. The other end of the guide shaft 39 is locked to one end of the reaction plate 37.

First, the guide shaft 39 is inserted into the inside of the heat conduit 1 (of the same type as that used in the above-mentioned first embodiment) to be propelled, and the guide shaft 39 is set on the pressing jig 35 and propelled. When the jack 34 is propelled, the jack portion 41 of the reaction force receiving device 36 is retracted (retracted to the fume tube 33 side), and the heat conduit 1 is propelled into the fume tube 33. When the propelling jack 34 is thus propelled for a predetermined length, the propelling jack 34 is retracted.

Thereafter, as shown in FIG. 12, the tightening jig 4
0 is removed, the coupling of the guide shaft 39a behind the propelled heat conduit 1 is released, and the joint pipe 4 is propelled next.
The guide shaft 39a having a length substantially corresponding to the length (of the same type as that used in the first embodiment) is removed. Then, the guide shaft 39a is inserted into the joint pipe 4 and the joint pipe 4 is set on the pressing jig 35. Then, the guide shaft 39b which is connected and added is added to the reaction force receiving device 3
The 6th side is connected to the rear end of the guide shaft 39, and the tightening jig 40 is attached.

After that, an adhesive is applied to the outer periphery near the rear end of the heat pipe 1 and the inner periphery near the front end of the joint pipe 4 to propel the propulsion jack 34, and at the same time, the jack portion 41 of the reaction force receiving device 36 is retracted. The outer periphery of the heat pipe 1 near the rear end portion and the inner periphery of the joint pipe 4 near the front end portion are fitted and brought into close contact with each other (retracting to the fume pipe 33 side). Then, similarly to the first embodiment described above, the far infrared heater is used to accelerate the curing, and after the curing is completed, the propelling jack 34 is propelled and at the same time the jack portion 41 of the reaction force receiving device 36 is retracted (toward the fume tube 33 side). When it is moved backward and is propelled for a predetermined length, only the jack portion 41 of the reaction force receiving device 36 is stopped and only the propulsion jack 34 is propelled. Then the guide shafts 39, 39a, 39
Since the reaction force receiving device 36 takes a propulsive reaction force via b, only the joint pipe 4 is firmly pressed by the heat pipe 1 and the degree of fitting is increased. At that time, the guide shafts 39, 39a, 39b are linearly fitted, and the linearity is also improved.

After increasing the degree of fitting in this way, the propelling jack is retracted again as shown in FIG. 11, and the process shown in FIGS. 11 to 14 is performed for the heat conduit to be added next. If it goes in the same way, the heat conduit 1 is connected and installed in the fume tube 33.

In the case of the second embodiment as well, similar to the first embodiment described above, the mutual connection of the heat conduits 1 and 1 is based on the joint pipe 4 fitted to the outer periphery thereof, and the connection is achieved only by propelling and pressing. Is completed. Therefore, the construction is extremely easy. Moreover, since the pressure is propelled along the guide shaft 39 and the like, it is easy to ensure the linearity of the heat conduit to be laid and the construction accuracy is high.

Further, unlike the first embodiment, all of the various equipment required for the construction may be installed in the vertical shaft on the starting side, so that the labor can be further reduced and the construction can be performed more quickly than in the first embodiment.

[0031]

According to the first aspect of the present invention, by pressurizing and propelling the joint pipe with respect to the heat conduit, the two are taper-fitted, so that they are alternately propelled in the existing pipeline. The heat conduit can be laid by itself. Therefore, the installation can be performed very easily and quickly. Moreover, since it is propelled along the guide shaft, it is easy to ensure the linearity and the construction accuracy is high. In addition, the heat conduit to be installed is GFRP
Since it is manufactured, it has excellent corrosion resistance, and because it is lightweight, it can be easily handled for transportation and loading. Furthermore, it has higher heat insulation than steel pipes. Furthermore, between the front end of the heat conduit propelled in the existing conduit and the support plate facing the opening of the existing conduit in the arrival side vertical shaft, two types corresponding to the axial length of the heat conduit and the joint pipe are provided. Since the connecting row of the support shafts is interposed and the front end of the heat conduit is always pushed and pushed rearward, the heat conduit and the joint pipe can be laid securely. According to the invention of claim 2, since all the equipment required for construction can be installed in the vertical shaft on the starting side, the labor can be further reduced and the construction can be carried out more quickly than in the invention of claim 1.

[Brief description of drawings]

FIG. 1 is a side sectional view of a heat pipe used in an example.

FIG. 2 is a side sectional view of a joint pipe used in an example.

FIG. 3 is an explanatory diagram showing a state before the heat conduit is pressurized and propelled in the first embodiment.

FIG. 4 is an explanatory view showing a state in which the heat conduit is pressurized and propelled in the first embodiment.

FIG. 5 is an explanatory view showing a state of preparation for propulsion of the joint pipe by partially removing the guide shaft in the first embodiment.

FIG. 6 is an explanatory view showing a state in which the fitting pipe and the heat pipe are brought into close contact with each other and heated by a far infrared heater in the first embodiment.

FIG. 7 is a partial cross-sectional side view of a main part in a state where the joint pipe and the heat pipe are brought into close contact with each other and heated by the far infrared heater in the first embodiment.

FIG. 8 is a perspective view showing a state in which a far-infrared heater is mounted on the outer periphery of the contact portion between the joint pipe and the heat conduit in the first embodiment.

FIG. 9 is an explanatory view showing a state in which the joint pipe is propelled under pressure in the first embodiment.

FIG. 10 is an explanatory view showing a state before the heat conduit is pressurized and propelled in the second embodiment.

FIG. 11 is an explanatory diagram showing a state where the propulsion jack is retracted in the second embodiment.

FIG. 12 is an explanatory view showing a state of preparation for propulsion of the joint pipe by partially removing the guide shaft in the second embodiment.

FIG. 13 is an explanatory diagram showing a state before pressure propelling the heat conduit in the second embodiment.

FIG. 14 is an explanatory diagram showing a state in which the heat conduit is pressurized and propelled in the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat conduit 4 Joint pipe 9 Fume pipe 10 Support shaft 11 Support shaft 12 Reaction force stand 13 Reaction force receiving device 15 Support plate 17 Reaction force plate 18 Propulsion stand 19 Propulsion jack 20 Pressure jig 21 Guide shaft 23 Far infrared heater

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Junichi Yahagi 4-83-3 Shibaura, Minato-ku, Tokyo Kandenko Co., Ltd. (72) Inventor Kazuyuki Ise 1-2-2 Miyashita, Sagamihara City, Kanagawa Asahi Glass Matex Co., Ltd. (72) Inventor Koshiro Hayashi 1-2-2 Miyashita, Sagamihara-shi, Kanagawa Asahi Glass Matex Co., Ltd. (72) Inventor Hidenaga Kimura 2-10-2 Hamamatsucho, Minato-ku, Tokyo Stocks Association Kanae Co., Ltd. (56) Reference JP-A-60-37398 (JP, A) JP-A-56-124783 (JP, A) Actual Kaihei 2-21397 (JP, U) Actual Kaihei 2-117493 (JP, U)

Claims (2)

[Claims] 1. A heat pipe made of GFRP, which is taper-processed in an existing pipe line buried between a start-side shaft and a destination-side shaft to reduce the outer diameter toward the ends near the outer periphery near both ends. Into the existing pipeline, a GFRP joint pipe having a configuration in which the ends of the heat conduits are closely fitted in the inner circumference of both ends is tapered by itself. In the laying method in which the heat conduit and the joint pipe are alternately pressurized and propelled by alternately pushing them in,
Between the front end of the heat conduit pushed into the existing conduit and the support plate provided facing the opening of the existing conduit in the reaching side shaft, two types of axial direction of the heat conduit and the joint pipe A plurality of connection rows connecting support shafts corresponding to the lengths of the above are arranged at equal intervals on a concentric circle centered on the axis of the existing pipeline and supported, and provided on the reaction table of the reaching side vertical shaft. While pushing the support plate toward the opening by the jack of the reaction force receiving device, the heat conduit and the joint pipe are installed by the expandable propulsion jack fixed to the propulsion base provided in the starting side vertical shaft. While pressing inward, the heat conduit and the joint pipe are pressurized and propelled along a guide shaft to which a large number of shafts of appropriate length that are tensioned between the propulsion base and the reaction force base are connected. Depending on the length of these heat conduits and joint pipes, Remove the Oite the support shaft, the adhesion portion of the heat pipe and the joint pipe is characterized by bonding with an adhesive, laying method GFRP heat conduit. 2. A heat pipe made of GFRP tapered in an existing pipeline buried between the start-side shaft and the arrival-side shaft to reduce the outer diameter of the outer periphery near both ends toward the ends. Into the existing pipeline, a GFRP joint pipe having a configuration in which the ends of the heat conduits are closely fitted in the inner circumference of both ends is tapered by itself. In the laying method in which the heat conduit and the joint pipe are alternately pressurized and propelled by alternately pushing them in,
The support plate provided on the jack of the reaction force receiving device provided on the side opposite to the existing pipeline of the propulsion table provided on the starting side vertical shaft and the reaction plate that abuts the front end of the heat conduit pushed into the existing pipeline. A guide shaft, to which a large number of shafts of appropriate length, which are stretched around the force plate, are connected, is provided, and the reaction force plate is extended through the support plate and the guide shaft by extension of the jack of the reaction force receiving device. While pulling to the rear, by pressing the expandable propulsion jack provided on the side of the existing pipeline of the propulsion table, while pressing and propelling the heat conduit and the joint pipe along the guide shaft into the existing pipeline, A method of laying a GFRP heat conduit, characterized in that the contact portion between the heat conduit and the joint pipe is bonded with an adhesive.