JPH08100600A - Method of carrying-in large-diameter steel pipe from shaft section to inclined shaft section - Google Patents

Abstract

PURPOSE: To improve profitability, safety and maintainability by eliminating the need for an adit for a large-scale winch yard in the lower section of a shaft and double winches arranged on the yard, preventing the holding of an operator among a bedrock and the double winches carried in and out and the damage of the double winches due to a contact with the bedrock and extremely lengthening the limit length of a large-diameter steel pipe. CONSTITUTION: A steel pipe 3 is carried into a shaft section 01 by a winch installed to the tower of a shaft top section, rollers 18, 19 for carrying-in are mounted on the steel pipe 3 at the specified places of the lower section of the shaft section 01, and the rollers 18, 19 for carrying-in are suspended until the rollers 18, 19 are brought into contact with an inclined-shaft section rail 20 while delivering a chain for a motor chain block 10 for hanging down the steel pipe hung down from the winch. The holding of the steel pipe 3 is transferred to a wire 27 from a ground winch separately set up to the winch, the load of the motor chain block 10 is released, and the wire 27 is delivered and the steel pipe is carried into the inclined shaft section 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for carrying a large-diameter iron pipe from a vertical shaft to an inclined shaft.

[0002]

2. Description of the Related Art As a vertical shaft type of a hydraulic pipe of a hydroelectric power plant, a vertical pipe (hereinafter referred to as a vertical pipe) is conventionally used, for example, as shown in FIG. 7 (A) longitudinal sectional view and FIG. 7 (B) plan view. ) And a horizontal pipe are generally connected to each other at a curved pipe portion provided at the lower part of the vertical shaft portion 01. At this time, the installation of the hydraulic line is
After installing 3 to 4 lower penstocks of the penstock 1 through the vertical shaft 01, the vertical pipes are installed sequentially from the lower part of the vertical shaft 01 to the upper side, and the horizontal pipes are already loaded from another loading pit. This is done by connecting to the already installed lower curved pipe 02. That is, the installation of the lower curved pipe portion, first, until the lower curved pipe 02 carried in from the vertical shaft portion 01, the rail 03 laid on the curved pipe portion and the sled 04 attached to the lower curved pipe 02 come into contact with each other. It is hung by a hanging device for vertical shaft loading (not shown). Then, the carrying wire 08 is pulled out from the winch rear drum 07 of the multi-body winch 06 installed in the winch yard horizontal shaft 05 at the lower part of the vertical shaft 01, and the direction of the carrying wire 08 is changed by the wire flight bar anchor part 09. The load of the lower bending pipe 02 is increased by engaging the lower bending pipe 02 through the loading / direction changing anchor portion 011 installed in the anchor setting horizontal shaft 010 and applying tension to the loading wire 08. Move from the suspension equipment for carry-in. Then, in a substantially similar manner, the direction changing wire 013 is pulled out from the winch front drum 012 of the multi-body winch 06, and this is changed in direction by the wire flying bar anchor portion 09, and the anchor installation side shaft 0
Carrying-in and direction-changing anchor part 011 installed in No. 10
Through the lower curved pipe 02, and the preparation for carrying in the curved pipe portion is completed. Further, by pulling out the carrying wire 08 from the winch rear drum 07 of the multi-body winch 06, the sled 04 attached to the lower surface of the lower curved pipe 02 moves the lower curved pipe 02 to the fixed position by using the rail 03 as a guide. Installation will be carried out. Further, in accordance with this loading operation, the direction changing wire 013 is pulled out from the winch front drum 012 of the multi-body winch 06, and the direction changing wire 01 is so arranged that the upstream sled 04 always contacts the rail 03.
The lower curved pipe 02 is loaded into the curved pipe portion while adjusting the tension of 3.

However, such a method has the following drawbacks. (1) A large-scale winch yard 05 must be excavated at the bottom of the vertical shaft 01 in order to place the double-hulled winch 06, which is a winch for carrying the lower curved pipe 02 into the inclined shaft part and for changing the direction. However, the excavation cost is high, and the economy is not sufficient. (2) Since it is necessary to carry the double-hull winch 06 in and out of the winch yard horizontal shaft 05, the double-hull winch 06 has a high loading and unloading cost, and therefore the economy is not sufficient. (3) When loading / unloading the compound winch 06 to / from the winch yard 05, workers were caught between the rock and compound winch 06, or the compound winch 06 contacted the rock and was damaged. There is a fear that it will happen, so there is concern about human life safety and equipment maintenance. (4) In the specified excavation cross section for carrying the iron pipe from the vertical shaft 01 to the inclined shaft, the limit length of the large diameter iron pipe is limited to 6.0 m, so it is difficult to suppress the number of the large diameter iron pipes described above. The amount of work is heavy and the economy is not sufficient.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and requires a large-scale winch yard at the bottom of a vertical shaft and a double-hulled winch to be placed here. In addition, the worker may be pinched between the bedrock and the loading and unloading compound body winch, or the compound body winch may be damaged by contacting the bedrock, and the maximum length of the large diameter steel pipe should be maximized. It is an object of the present invention to provide a method for carrying a large-diameter iron pipe from a vertical shaft portion to an inclined shaft portion that can be performed and is therefore excellent in economical efficiency, safety, and maintainability.

[0005]

Therefore, according to the present invention, a large-diameter iron pipe is carried into the shaft by a hoisting winch installed on a turret at the top of the shaft, and the large-diameter iron pipe is carried into the large-diameter iron pipe at a predetermined position below the shaft. While feeding the chain of the electric chain block for suspending the iron pipe suspended on the hoisting winch, suspend it until the carry-in roller comes into contact with the inclined shaft rail, and then hold the large-diameter iron pipe by the hoisting. The wire from the ground winch installed separately from the winch is transferred, the load of the electric chain block is released, the wire from the ground winch is fed out, and the large-diameter iron pipe is carried into the inclined shaft section. In order to prevent the center of gravity of the large-diameter iron pipe from moving upward and to facilitate the transition to the inclined shaft loading position, lower the balance above the electric chain block at a predetermined position. Attracting and fixed, together, the inclined shaft carrying wire from the vertical shaft near the lower portion of the anchor to the inclined shaft carrying position to shift the large 径鉄 pipe while feeding, characterized in that carried into the inclined shaft portion.

[0006]

According to this structure, the large diameter iron pipe is carried into the shaft by the hoisting winch installed on the turret at the top of the shaft, and the carrying roller is attached to the large diameter iron pipe at a predetermined position at the lower part of the shaft. While feeding out the chain of the electric chain block for suspending the iron pipe suspended on the hoisting winch, after suspending until the loading roller comes into contact with the inclined shaft rail,
The holding of the large diameter iron pipe is transferred to the wire from the ground winch installed separately from the winding winch, the load of the electric chain block is released, the wire from the ground winch is fed out, and the large diameter iron pipe is moved to the inclined shaft portion. At the time of loading, pull up the balance above the electric chain block at a predetermined position to prevent the upward movement of the center of gravity of the large diameter iron pipe that occurs in these processes and to facilitate the transition to the inclined shaft loading position. Since the large-diameter iron pipe is transferred to the inclined shaft loading position while feeding the inclined shaft loading wire from the anchor near the lower part of the vertical shaft and is fed into the inclined shaft portion, the following actions are performed. (1) A large-scale winch yard for excavating at the bottom of the shaft and a double-barreled winch installed here are not required, and as a result, excavation costs and equipment costs are reduced. (2) The loading and unloading work of the multi-body winch into and out of the mine is eliminated, and as a result, the loading and unloading cost of the multi-body winch becomes unnecessary. (3) There is no need to carry in and out the compound winch to and from the mine, and as a result, there will be no accident in which the worker is sandwiched between the rock mass and the compound winch, or the compound winch contacts the rock mass. (4) The degree of freedom in the attitude of the iron pipe at the entrance of the inclined shaft is increased, and as a result, it is possible to increase the limit length of the iron pipe and reduce the amount of work.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The same reference numerals as those in FIG. 7 denote the same members as those in the same drawing. First, FIG. 1 (A) is a plan view of a shaft top and FIG. In the partial side view, 1 is a vertical shaft turret that is erected concentrically on the outside of the vertical shaft 01 via four foundations 2 and 3 is two hoisting winches installed above the vertical turret 1. It is a large-diameter iron pipe (hereinafter referred to as an iron pipe) suspended by a single balance 5 supported by a hoisting winch wire 4. The base 6 is wound around a ground winch 7 arranged on the premises of the top turret 1 and the middle part is sequentially wound around a plurality of guide pulleys 8 arranged on the premises, and then the top turret. 1 is an iron pipe carrying wire guided to the upper part of 1.

Next, the vertical sectional view of the vertical shaft portion in FIG.
1 shows the first step in which the iron pipe 3 is loaded into the iron pipe 3, and 10 is a pair of electric chain blocks for connecting the hoisting winch wire 4 set on the balance 5 to the suspension equipment connected to the front and rear of the upper end of the iron pipe 3, respectively. Reference numerals 11 and 12 are spare wires and lever blocks that cooperate with each other to connect two left and right upper ends of the iron pipe 3 to the hanging equipment to prevent inclination of the iron pipe 3.

Further, FIG. 3 is a vertical sectional view of the vertical shaft portion and the inclined shaft portion, showing the second step which is the preparatory state of the direction change from the vertical shaft portion 01 of the iron pipe 3 to the inclined shaft portion 13, and 14 is the upper end curve of the inclined shaft portion 13. Anchor hardware installation side pit recessed on the outer side surface of the part, 15, 16 and 17 are fixed pulleys for the slant shaft part iron pipe suspension equipment, respectively, which are sequentially suspended outside the lower end of the anchor hardware installation side pit 14, A movable pulley and a sheave. 18,1
Reference numeral 9 denotes an upper roller and a lower roller attached to the upper end and the lower end of the side surface of the iron pipe 3 facing the anchor metal installation horizontal shaft 14, respectively, and 20 denotes an inclined shaft portion 13 facing the upper roller 18 and the lower roller 19 of the iron pipe 3. This is a roller rail laid on the vertical surface.

4 (1) and 4 (2), the horizontal cross-section of the upper end of the inclined shaft shows the third step which is the latter stage of the preparation for the direction change from the shaft 01 to the inclined shaft 13 of the iron pipe 3. Is a ground-side lever block connected to a ground-side anchor 22 attached to the outer side surface of the upper-end curved portion of the inclined shaft portion 13 (hereinafter referred to as the ground side), and 23 is an inner-side surface of the upper-end curved portion of the inclined shaft portion 13 (hereinafter referred to as the top side) It is a top lever block connected to the top anchor 24 attached to the. Reference numerals 25 and 26 are a shaft stake installation center and an inclined shaft installation center, respectively.

Further, FIG. 5 is a vertical sectional view of the vertical shaft portion and the inclined shaft portion,
The 4th process which is a carrying-in preparation state from the vertical shaft part 01 of the iron pipe 3 to the inclined shaft part 13 is shown.

Next, FIG. 6 is a vertical cross-sectional view of the vertical shaft portion and the inclined shaft portion, showing the fifth step in which the iron pipe 3 is started to be transferred from the vertical shaft portion 01 to the inclined shaft portion 13, and 27 is an inclined shaft loading wire.

In such an apparatus, first, as shown in FIG. 2, the hoisting winch wire 4 of the hoisting winch is fed out, the balance 5 is lowered, and the spare wire 11 is fed.
While adjusting the lever block 12 and maintaining the horizontality of the iron pipe 3, the iron pipe 3 is carried into the vertical shaft 01.

Next, as shown in FIG. 3, the lowering of the iron pipe 3 is stopped at the lower fixed position of the vertical shaft 01, and the upper roller 18 and the lower roller 19 are attached to the upper and lower ends thereof, respectively.

Further, as shown in FIG. 4 (1), a ground-side lever block 21 and a ceiling-side lever block 23 are attached to the ground-side anchor 22 and the ceiling-side anchor 24, respectively.
As shown in FIG. 4 (2), the top-side lever block 23 is loosened while the bottom-side lever block 21 is wound, the iron pipe 3 is rotated to the inclined shaft installation center 26, and the shaft part 01 is pulled toward the ground side.

Then, as shown in FIG. 5, the spare wire 11 and the lever block 12 are removed and the lower roller 19 is pulled out while pulling out the chain of the electric chain block 10.
Moves down the iron pipe 3 using the rail 20 as a guide.

Further, as shown in FIG. 6, when the upper end of the iron pipe 3 reaches the anchor pit for installing the metal fittings 14, the inclined shaft carry-in wire 27 is fed into the fixed pulley 15 to make the sheave 1
Attach the sling wire from 7 to the iron pipe 3. Then, by further pulling out the chain of the electric chain block 10,
Tension is applied to the inclined shaft loading wire 27, so that the iron pipe 3 transfers the load to the ground winch 7 via the inclined shaft loading wire 27. Here, in a state where the chain of the electric chain block 10 is loose, the electric chain block 1 is moved from the iron pipe 3 to the electric chain block 1.
0 hook is removed and the ground side lever block 21
Also, the top lever block 23 is released, and the balance 5 is returned to the center of the vertical shaft 01. Then winch 7
By pulling out the inclined shaft loading wire 27, the iron pipe 3 is loaded to the installation position of the inclined shaft portion 13 with the upper roller 18 and the lower roller 19 using the rails 20 as guides.

According to such a method of the embodiment, the large diameter iron pipe is carried into the shaft by the hoisting winch installed on the turret at the top of the shaft, and the large diameter iron pipe is loaded into the large diameter iron pipe at a predetermined position in the lower part of the shaft. While feeding the chain of the electric chain block for suspending the iron pipe suspended on the hoisting winch, suspend it until the carry-in roller comes into contact with the inclined shaft rail, and then hold the large-diameter iron pipe by the hoisting. Moving to the wire from the ground winch installed separately from the winch,
The load of the electric chain block is released, the wire from the above-mentioned winch is fed out, and the large-diameter iron pipe is carried into the inclined shaft portion.At the same time, the center of gravity of the large-diameter iron pipe is prevented from moving upward in these processes, and the inclined shaft is brought in. In order to facilitate the transition to the posture, the balance above the electric chain block is pulled down and fixed at a predetermined position, and at the same time, the inclined shaft carry-in posture is taken out while feeding the inclined shaft carry-in wire from the anchor near the bottom of the shaft. Since the large-diameter iron pipe is transferred and carried into the inclined shaft portion, the following effects can be obtained. (1) A large-scale winch yard for excavating at the bottom of the shaft and a double-barreled winch installed here are not required, resulting in a reduction in excavation costs and equipment costs, thus improving economic efficiency. To do. (2) The loading and unloading work of the multi-body winch into and out of the mine is eliminated, and as a result, the loading and unloading cost of the multi-body winch becomes unnecessary, thus improving the economical efficiency. (3) There is no need for loading and unloading of the compound winch into the mine, and as a result, there is no accident that a worker is sandwiched between the bedrock and the compound winch or the compound winch contacts the bedrock. The safety of equipment and the maintainability of equipment are improved. (4) The degree of freedom in the attitude of the iron pipe at the entrance of the inclined shaft increases, and as a result, the length of the iron pipe can be increased, which reduces the amount of work and thus improves the economy. By the way, the limit length L of the iron pipe is from 6.0 m to 1
It became possible to increase the length to 2.0 m.

[0019]

In summary, according to the present invention, a large-diameter iron pipe is carried into the shaft by a hoisting winch installed on the turret at the top of the shaft, and a loading roller is attached to the large-diameter iron pipe at a predetermined position in the lower part of the shaft, While unwinding the chain of the electric chain block for suspending the iron pipe suspended on the hoisting winch, after suspending until the loading roller comes into contact with the inclined shaft rail, the holding of the large diameter iron pipe is separated from the hoisting winch. The wire from the installed ground winch is transferred, the load of the electric chain block is released, the wire from the ground winch is fed out, and the large-diameter iron pipe is carried into the inclined shaft portion, and the large-diameter iron pipe generated in these processes In order to prevent the center of gravity from moving upward and to facilitate the transition to the inclined shaft loading position, pull the balance above the electric chain block downward at a predetermined position. In addition, the large-diameter iron pipe is moved to the inclined shaft loading position while feeding the inclined shaft loading wire from the anchor near the lower part of the vertical shaft, and the large-diameter iron pipe is transferred to the inclined shaft part for use in a large-scale winch yard. There is no need for a side pit or a compound winch to be placed here, and a worker is sandwiched between the bedrock and a compound winch to be carried in or out, or the compound winch contacts the bedrock and is damaged, Furthermore, the limit length of large diameter iron pipe can be made as long as possible,
Therefore, the present invention is extremely useful industrially, since a method for carrying in a large-diameter iron pipe from a vertical shaft portion to an inclined shaft portion that is excellent in economic efficiency, safety, and maintainability can be obtained.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) and (B) are a plan view of a shaft and a partial side view of a turret thereof, respectively.

2 is a vertical cross-sectional view showing a suspended state of the iron pipe 3 in the vertical shaft portion 01 of FIG. 1. FIG.

FIG. 3 is a vertical cross-sectional view showing a preparatory state of the direction change of the iron pipe 3 from the vertical shaft portion 01 to the inclined shaft portion 13 in FIG.

FIG. 4 shows a state in which the iron pipe 3 from the vertical shaft portion 01 to the inclined shaft portion 13 in FIG. 1 is ready for a direction change, and (A) and (B) are horizontal sectional views, respectively.

5 is a vertical cross-sectional view showing a state of preparation for loading the iron pipe 3 from the vertical shaft portion 01 to the inclined shaft portion 13 in FIG.

FIG. 6 is a vertical cross-sectional view showing a state where the iron pipe 3 is started to be loaded from the vertical shaft portion 01 to the inclined shaft portion 13 in FIG.

FIG. 7 shows a vertical shaft section and an inclined shaft section of a known construction site of a hydroelectric power plant, and (A) and (B) are a vertical sectional view and a plan view, respectively.

[Explanation of symbols]

 1 Top Turret 2 Foundation 3 Iron Pipe 4 Winch Wire 5 Balance 6 Iron Pipe Carrying Wire 7 Ground Winch 8 Guiding Pulley 10 Electric Chain Block 11 Spare Wire 12 Lever Block 13 Diagonal Shaft Part 14 Anchor Metal Installation 15 Horizontal Pulley 16 Fixed Pulley 17 Shear 18 Upper roller 19 Lower roller 20 Rail 21 Ground lever block 22 Ground anchor 23 Sky lever block 24 Sky anchor 25 Shaft stake installation core 26 Shaft installation wire 27 Shaft loading wire 01 Vertical shaft section

Claims (1)

[Claims] 1. A large-diameter iron pipe is carried into the vertical shaft by a hoisting winch installed on a turret at the top of the vertical shaft, and a carrying-in roller is attached to the large-diameter steel pipe at a predetermined position in the lower part of the vertical shaft, and the large-diameter iron pipe is suspended from the hoisting winch. While feeding the chain of the electric chain block for suspending the iron pipe, after suspending until the loading roller comes into contact with the inclined shaft rail, holding the large diameter iron pipe is a wire from the ground winch installed separately from the winding winch. The load of the electric chain block is released, the wire from the ground winch is fed out, and the large-diameter iron pipe is carried into the inclined shaft portion, and the upward movement of the center of gravity of the large-diameter iron pipe occurs in these processes. In order to prevent and facilitate the transition to the inclined shaft loading position, the balance above the electric chain block is pulled downward and fixed at a predetermined position,
At the same time, the large-diameter iron pipe is transferred from the vertical shaft part to the oblique shaft part while the large-diameter iron pipe is transferred to the oblique shaft carry-in posture while feeding out the inclined shaft carry-in wire from the anchor near the lower part of the vertical shaft. Method.