JPH07260043A - Hydraulic iron pipe circularity holding device - Google Patents

Abstract

PURPOSE:To eliminate such defectiveness that since a hydraulic iron pipe is flexibly deformed due to its own weight at the time of carrying to a laying position inside a base rock or assembling work, a bord to be constructed inside the base rock for the purpose of the laying work requires a diameter larger than that of the hydraulic iron pipe so that drilling manhours and burying cement are increased. CONSTITUTION:A hydraulic iron pipe circularity holding device comprises a carrying-in carriage 5 for carrying a hydraulic iron pipe 1, a transportation carriage 6 provided with a travel drive device and a connector with the carrying-in carriage 5, and a circularity holding device 8 fixingly mounted on the transportation carriage 6, capable of traveling inside the hydraulic iron pipe above the carrying-in carriage 5 in the axial direction when fixture to the carrying-in carriage 5 is released at the time of connection of the carrying-in carriage 5 to the transportation carriage 6 and of pressing plural points including an upper point at the inner circumferential surface of the hydraulic iron pipe 1 so as to hold the lateral cross-sectional shape of the hydraulic iron pipe 1 in approximate circularity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for holding a perfect circularity of a penstock used for the on-site installation work of a penstock used as a conduit for a hydraulic power plant or a reservoir dam.

[0002]

2. Description of the Related Art A penstock used for a water intake pipe of a hydroelectric power plant is a steel plate having a thickness of 22 to 50 m / m and a diameter of 4 to 7
m, the length of the pipe is 9 to 12 m, and it is made into a penstock, and the penstock is laid sideways and mounted on a loading trolley.
It is formed by loading it into a tunnel with an inclination of about °, and then sequentially adding it upward from the lowest position.

Therefore, the penstock mounted on the loading carriage is
It is loaded into the mineway in a state where a deflection of about 150 to 400 m / m is left in the diameter direction by its own weight, and temporary welding is performed while aligning the lower end surface of the loaded hydraulic iron pipe with the upper end surface of the existing hydraulic iron pipe below. Work is going on.

Further, the penstock mounted on the loading carriage is
When it is carried in through an inclined part having an angle of 50 °, it is also bent in its length direction. In order to carry out tack welding work with the upper end of the existing penstock, the gap between the penstock outer surface and the rock bed must be 6
It is necessary to excavate the tunnel to secure a space for loading and working so that it will be 00 mm or more, but recently, to reduce the number of rock excavation man-hours and the cost of filling the space with cement, the space will be narrowed to 300 mm. Is required. For this reason, it is difficult to carry out the work by the conventional method of loading the penstock with the flexure still in place, making the penstock that was carried in at the time of temporary welding the perfect circle, and installing it in the bedrock. Or, even if the penstock can be kept in a perfect circle during temporary welding, how to carry out the device for maintaining a perfect circle from the tunnel after the work is also a problem.

[0005]

DISCLOSURE OF THE INVENTION The present invention, as described above, reduces the distance between the rock surface and the outer surface of the penstock to be laid in the bedrock so that the penstock can be installed in the tunnel formed in the bedrock. Since the work is carried in and temporary tack welding work is performed with the existing hydraulic iron pipe, the cross-sectional shape of the hydraulic iron pipe can be maintained in a perfect circular shape at the time of carry-in and temporary tack welding work. It is an object of the present invention to provide a penstock holding device for penstocks that can be easily removed from a tunnel.

[0006]

Therefore, the penstock holding device for a penstock of the present invention has the following means. (1) An incoming trolley was provided that can travel in a tunnel drilled in the bedrock where the incoming penstock is laid, is equipped with a recumbent penstock that is laid down, and transfers it to a position behind the existing penstock to be laid. In this case, a track on which the carry-in truck travels may be laid inside the gallery, and the track may travel on it. (2) A carriage is provided with a traveling drive device for traveling in the tunnel, and a transporting vehicle provided with a connecting device at the front end that can be connected to the rear end of the loading truck. Like the carry-in carriage, the carrying carriage may be allowed to travel on the track. (3) The carrier is placed on the carrier and
When it is connected to a carrier truck equipped with an incoming water pressure iron pipe, it is disconnected from the carrier vehicle, axially travels on the inner peripheral surface of the incoming water pressure iron pipe on the incoming vehicle, and is laid down at a predetermined position. A plurality of places including the upper portion of the inner peripheral surface of the iron pipe were pressed from the inside to make the cross-sectional shape of the incoming hydraulic iron pipe substantially circular, and a perfect circle holder for holding the shape was provided.

[0007]

After the loading hydraulic iron pipe is mounted on the loading carriage, the perfect circle holder is connected and the leading end of the loaded carriage is connected to the rear end of the loading carriage. Then, the connection between the carriage and the perfect circle holder is released, and the perfect circle holder is axially moved to a predetermined position in the incoming penstock.

When the perfect circle holder reaches the position where a substantially perfect circle is formed on the incoming penstock, the inner peripheral surface of the incoming penstock is pressed from the inside. The pressing positions are a plurality of positions including the upper part of the inner peripheral surface where the deformation is greatest due to the influence of gravity. In this state, the incoming hydraulic iron pipe is transferred to the rear of the existing hydraulic iron pipe for temporary welding, and the tip of the incoming hydraulic iron pipe and the rear end of the existing hydraulic iron pipe are tack welded. Then, the perfect circle holder stops pressing the inner peripheral surface of the incoming penstock, is moved to the top of the carriage, is connected to the carriage, and is connected to the carriage by the traveling drive device provided in the carriage to carry the carriage and the penstock. Is removed to the outside of the mine along with the empty loading trolley left at the temporary welding position.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A penstock holding device for a penstock of the present invention will be described below with reference to the drawings. 1 to 4 are side views showing an embodiment of a hydraulic iron pipe perfect circle holding device of the present invention. FIG. 1 is a temporary assembly site, in which a carrying carriage 5 loaded with incoming hydraulic iron pipes 1 holds a perfect circle. 2 shows a situation in which the carrier truck 6 equipped with the tool 8 approaches, and FIG. 2 shows a large winch not shown up to the rear of the existing hydraulic iron pipe 2 with the incoming hydraulic iron pipe 1 kept in a substantially circular shape by the perfect circle holder 8. FIG. 3 shows a situation in which the rope 9 for a large winch as a traveling drive device wound around is lowered, and FIG. 3 shows the perfect circular holder 8 after temporary welding of the existing hydraulic iron pipe 2 and the incoming hydraulic iron pipe 1. After the tilting cylinder 15 is contracted and the upper pressing cylinder 12 is tilted to lower the center of gravity, the rope 11 is wound around the winch 10 serving as a moving device so as to maintain the perfect circle holder 8.
4 shows a situation in which the vehicle is stored in the fixture 7 of the carriage 6, and FIG.
After driving the support rod (not shown) into the bedrock 3 and fixing the temporarily welded incoming hydraulic iron pipe 1, the loading carriage 5 releases the support of the incoming hydraulic iron pipe 1 and winds up the large winch rope 9. This shows the situation where the transport carriage 6, the carry-in carriage 5, and the perfect circle holder 8 are carried out to the temporary assembly site.

5 to 7 are sectional views taken along the line A--A of FIG. 2 and show how the carried-in penstock 1 is brought into a substantially perfect circular shape by the action of the perfect circular holder 8. .

In these figures, the carry-in carriage 5 is formed by connecting two carriages so that the carry-in penstock 1 is not derailed from the curved track of the rail 4. Further, the front end of the carriage 6 can be connected by a connecting device 17. The fixture 7 provided on the carrier 6 has a structure in which the frame of the perfect circle holder 8 fits, and is fixed in a state of being pulled by a winch 10 as a moving device provided on the carrier 6. A perfect circle holder 8 on the U-shaped part of the tool 7.
When the frame is fitted, the perfect circle holder 8 is firmly fixed. In this state, the carrier truck 6 and the carry-in truck 5 are connected to the connecting device 1
When connected by 7, a part of the perfect circle holder 8 is in a state of being put into the incoming penstock. In addition, the weight of the carriage 6 is sufficient to support the perfect circle holder 8 supported in this way.

The perfect circle holder 8 is for making a perfect circle by pushing the cross section of the incoming hydraulic iron pipe 1 in three directions. The cylinders assembled at a pitch of about 120 degrees are arranged in the axial direction of the incoming hydraulic iron pipe 1. It is composed of two units with an interval of ~ 3m. As a result, the trolley 6 has an inclination of 50
Even when traveling on a pit 18 that reaches 0 °, the perfect circle holder 8
Can be correctly held in the axial direction of the incoming penstock.

The 12 o'clock portion of the clock of the cylinder,
That is, the upper pressing cylinder 12 that pushes above the inner peripheral surface of the incoming penstock 1 is connected by the connecting link 16, and the tilting cylinder 15 can be tilted during traveling to lower the center of gravity. It can be stabilized at times.

Further, the lower pressing cylinder 14 is floated at the time of transportation, and the wheels 13 provided adjacent to the lower pressing cylinder 14 are carried in.
Run on the inner surface. As shown in FIG. 5 to FIG. 7, the lower pressing cylinder 14 has an inner peripheral surface of the incoming penstock 1 at 5 o'clock and 7 o'clock.
It is arranged so that the time position can be pressed, and after traveling to the predetermined position in the axial direction of the incoming hydraulic iron pipe 1, it is extended and the wheels 13 are floated and brought into an operating state.

Next, after the upper pressing cylinder 12 correctly held in the axial direction of the incoming hydraulic iron pipe 1 is raised in the pipe radial direction, the cylinder is extended to hold the incoming hydraulic iron pipe 1 in a perfect circle.

As described above, the incoming hydraulic iron pipe 1 mounted on the loading carriage 5 has an upper pressing cylinder 12 and a lower pressing cylinder 1 installed at two axial positions and three circumferential positions.
By pushing linearly in the radial direction with the jacks in the four directions of No. 4, the incoming penstock 1 can be brought close to a perfect circle. As shown in FIGS. 5 to 7, the upper and lower pressing cylinders 12 and 14 are fitted with a formwork 19 corresponding to the arc of the inner diameter of the incoming penstock, and the point press is linearly pressed.
It is also possible to make a circular arc over a wide range.

In this embodiment, the downward pressing cylinder 14
Although the installation position in the circumferential direction of 5 o'clock and 7 o'clock has been shown as an example, the present invention is not limited to this.

In this way, after the incoming penstock 1 which has been made into a perfect circle is transferred to the rear of the existing penstock 2 already installed in the tunnel 18, the tip of the penstock 1 and the rear part of the existing penstock 2 are transferred. The ends are brought into contact, and tack welding is performed. After the tack welding, as shown in FIG. 3, the upper pressing cylinder 12 is tilted by the tilting cylinder 15, and then the lower pressing cylinder 14 is retracted until the wheels 13 come into contact with the inner peripheral surface of the incoming hydraulic iron pipe 1. Winch 1 attached to the carriage 6 after
0 and the rope 11 to fix the perfect circle holder 8 on the carriage 6 and fix it by the fixing fixture 7, and then carry it out to the temporary assembly factory together with the carriage 6 and the carry-in carriage 5 by the large winch rope 9 for one step. Work is completed.

[0019]

[Effects of the Invention] According to the penstock holding device for a hydraulic iron pipe of the present invention, the following effects can be obtained by the constitutions set forth in the claims. (1) Even in an inclined rock bed, the incoming penstock, which is carried into the installation location, is not deformed in the diametrical direction and the longitudinal direction, and the perfect circular state can be maintained. (2) Even if the distance between the outer surface of the incoming penstock and the bedrock is narrow, the lower end of the incoming penstock and the upper end of the existing penstock can be positioned and assembled by temporary welding in a perfect circle. (3) After the assembly, the perfect circle holding device can be automatically and easily carried out from the assembled position.

As described above, the perfect circle holding device of the present invention accurately assembles a penstock in a slanted and narrow rock mass.
It can be done efficiently and safely, and its effect is great.

[Brief description of drawings]

FIG. 1 is a side view showing the approaching state of a loading carriage and a carriage as an embodiment of the penstock holding device for a penstock of the present invention;

FIG. 2 is a side view showing a usage state of the perfect circle holder of FIG.

FIG. 3 is a side view showing the situation after tack welding of the embodiment shown in FIG.

FIG. 4 is a side view showing the withdrawal status after the work of the embodiment shown in FIG.

FIG. 5 is a front view of the true circle holder during running, as viewed in the direction of arrow AA in FIG.

FIG. 6 is a front view of the true circle holder during traveling, as viewed in the direction of arrow BB in FIG.

FIG. 7 is a front view of the true circle holder fixed in the direction of arrow BB in FIG.

[Explanation of symbols]

 1 Hydraulic penstock for incoming 2 Existing penstock for steel 3 Rock 4 Rail 5 Carrying truck 6 Carrying truck 7 Fixing device 8 Perfect circle holder 9 Rope for large winch as moving drive device 10 Winch as moving device 11 Rope 12 Upward pressing cylinder 13 Wheel 14 downward pressing cylinder 15 tilting cylinder 16 connecting link 17 connecting device 18 tunnel 19 formwork

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Shimoyama 1-1-1, Niihama, Arai-cho, Takasago-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Takasago Research Institute (72) Inventor Shunzo Okabe 1-chome, Wadazakicho, Hyogo-ku, Kobe No. 1 Sanryo Heavy Industry Co., Ltd.Kobe Shipyard (72) Inventor Masaru Ogasa 1-1-1, Wadasakicho, Hyogo-ku, Kobe Sanryo Heavy Industry Co., Ltd. Kobe Shipyard (72) Inventor Ryoichi Tatsumi Hyogo-ku, Kobe 1-1-1 Wadasakicho Sanryo Heavy Industries Ltd. Kobe Shipyard

Claims (1)

[Claims] 1. A transfer penetrating iron pipe to be joined is transferred to the rear of an existing penetrating iron pipe laid in the bedrock, and when the joining is carried out, a deflection due to its own weight of the carry-in penetrating iron pipe is corrected,
In a penstock holding device for forming and holding a substantially perfect circular cross section, a carrying carriage for placing the carrying penstock on its side and transferring it to a joining position, a connecting device for connecting the carrying car and traveling. A transport carriage provided with a drive device, and an inner peripheral surface of the carry-in hydraulic pressure iron pipe that is mounted on the transport cart and travels in the inside of the carry-in hydraulic pressure iron pipe in an axial direction when the transport carriage and the carry-in vehicle are connected. And a perfect circle holder that presses a plurality of positions including the upper part of the cross section to make the cross-section thereof into a substantially perfect circle and holds it.