JP2991049B2 - Inversion jig for large runner and inversion method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large runner reversing jig and a reversing method using the same, and more particularly, to a large runner reversing jig for reversing a posture of a runner (pump turbine) in a hydroelectric power plant. The present invention relates to an inversion method using this.

[0002]

2. Description of the Related Art When transporting a large runner (for example, an outer diameter of 4 m and a gravity of 50 tons) installed in a hydroelectric power plant,
In order to use a special vehicle and ensure stability and safety during transportation, as shown in FIG. 7, the runner 10 is loaded on the vehicle 12 via the blocks 10a and 10b with the larger diameter of the runner 10 facing downward. Transported.

[0003] However, when the loaded runner is mounted at a predetermined position in the facility, the runner is lifted by a large crane and moved to a fixed position. In this state, it is lowered into the casing 14 installed on the floor as shown in FIG. 8, and thereafter, the runner shaft (not shown) is inserted into the shaft portion (runner hole) of the runner 10 and fixed. .

FIGS. 9 to 14 are explanatory views showing a conventional runner reversing method. In each of the drawings, the runner is shown in a sectional view.

[0005] First, as shown in FIG. 9, each of the hanging wires 16 a and 16 b is passed through a runner hole of the runner 10 while a square bar 20 is interposed (for protecting the runner 10) in a wire mounting portion around the runner 10. After making one round of half of the above, they are individually connected in a loop by the junkles 22a and 22b. This loop-shaped hanging wire 16
The hooks 18a and 18b of the crane are lifted to a predetermined height while the a and 16b are installed at the symmetric positions.

[0006] Next, as shown in FIG.
Is lowered and the hook 18a is slightly raised, so that the posture state shown in FIG. 11 is obtained. Here, the runner 10 is rotated 180 degrees as shown in FIG. 12, and the hook 18b is raised as shown in FIG.
a is lowered, and this operation is continued until the runner 10 becomes horizontal. The runner 10 is turned upside down,
When is turned to a horizontal state, the hooks 18a and 18b are lowered together as shown in FIG. After that, it is transported to the installation position and mounted.

[0007]

However, in the above-mentioned prior art, a large amount of square materials must be interposed to protect the runners and prevent the suspension wires from slipping, which requires a great deal of time for the operation, and There is a problem that the work involves danger.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a large runner reversing jig and a reversing method using the same, which can simplify the reversing operation of the runner and improve safety.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a seat plate which can be attached to a female screw of a runner hole for attaching a runner shaft of a large runner by using a male screw, and this seat plate. And a wire suspension fitting having strength enough to withstand the load of the runner.

A reversing method using the reversing jig is conceivable. That is, a reversing jig provided with a wire hanging metal fitting on both surfaces is mounted on a female screw for shaft mounting of a runner hole of a runner, and a hanging wire is engaged with each of the wire hanging metal fittings.
These hanging wires can be individually lifted and lowered by a crane to change the posture of the runner from a horizontal position to a vertical position, and then the hanging wire which was initially lower can be pulled to reverse the posture of the runner.

[0011]

According to the above-described means, a reversing jig is formed from the seat plate fixed to the runner hole for mounting the runner shaft by screws and the suspension metal fittings provided on each of the both surfaces. A suspending wire is engaged with each of the suspending jigs of the reversing jig, and the posture of the runner is reversed while appropriately operating the lifting and lowering of these suspending wires. Accordingly, the reversing operation can be performed in a short time without using a protective material such as a square member or a straw, or a cushioning material, and the workability and safety can be improved.

Further, the reversing jig according to the present invention is attached to a runner hole of a runner, a suspending wire is engaged with each of the suspending metal fittings on both sides, and the lower suspending wire is lifted to incline the runner. Then, the runner is suspended only by the lower suspension wire and the runner is turned upside down. Thus, the runner can be turned upside down in a short time without impairing workability and safety by a simple operation.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a reversing jig for a large runner according to the present invention. The reversing jig 24 is mainly composed of an elliptical seat plate 26, and an “H” -shaped mounting member 28 is provided at the center of the surface of the seat plate 26. Further, four bolt holes 30 are provided in the periphery of the seat plate 26 so as to correspond to the positions of the bolt holes (for attaching the runner shaft) of the runner hole 10c of the runner 10. The reversing jig 24 is attached to the runner hole 10 c by the bolt 32 through the bolt hole 30.

A pair of "U" -shaped hanging fittings 34 are attached to the fitting mounting member 28 so that hooks of a crane can be engaged. A metal fitting mounting member 36 is provided upright on the back surface of the seat plate 26, and a pair of “U” -shaped hanging metal fittings 38 is mounted at this end.

Next, a runner reversing operation using the reversing jig of the present invention having the above-described configuration will be described.

First, the reversing jig 24 is moved from below the runner 10 placed on the blocks 10a and 10b to the halt 32.
To the runner hole 10c by using
This is carried out while being lifted by the crane through the hanging wire (not shown) on the hanging bracket 38). Next, as shown in FIG. 2, a hanging wire 40 is engaged with the hanging fitting 34, a hanging wire 42 is engaged with the hanging fitting 38, and the hanging wire 4 is attached.
The hook 18a is engaged with only 2.

Next, as shown in FIG. 3, while damping material 44 for preventing wire damage is interposed at the edge of runner 10,
The end of the suspension wire 40 is engaged with the hook 18b. In this state, if the block 10b is slightly loosened and the hook 18b is lifted while using the upper surface of the block 10b as a fulcrum, the runner 10 is in an upright state as shown in FIG.

In the state of FIG. 4, when the hook 18b is slightly lowered, the runner 10 tilts with the large diameter surface facing upward. If the runner 10 is rotated 180 degrees in this state, as shown in FIG. become. When the runner 10 is gradually lowered onto the block 10b, the runner 10 is turned upside down as shown in FIG.
a, 10b, and the reversing operation is completed.

[0020]

Since the present invention is constituted as described above, the following effects can be obtained.

According to the first aspect of the present invention, there is provided a reversing jig for a large runner, a seat plate which can be attached to a female screw of a runner hole for attaching a runner shaft of the large runner by using a male screw, and provided on both sides of the seat plate. And a wire suspension fitting having a strength capable of withstanding the load of the runner is provided, so that the runner can be used in a short time without impairing workability and safety without using a protective material or cushioning material such as a square member or a wall straw. Upside down.

In the reversing method according to the second aspect, a reversing jig provided with wire suspension metal fittings on both sides is attached to a female screw for attaching a shaft to a runner hole of a runner, and a suspension wire is connected to each of the wire suspension metal fittings. The hanging wires are individually lifted and lowered by a crane, the posture of the runner is changed from a horizontal position to a vertical position, and then the hanging wire that was initially lower is pulled to reverse the posture of the runner. Because it was
With a simple operation, the runner can be turned upside down in a short time without impairing workability and safety.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a reverse jig for a large runner according to the present invention.

FIG. 2 is an explanatory diagram showing a first step of a runner reversal process in the present invention.

FIG. 3 is an explanatory diagram showing a second step of a runner reversal process in the present invention.

FIG. 4 is an explanatory diagram showing a third step of the runner reversal process in the present invention.

FIG. 5 is an explanatory diagram showing a fourth step of the runner reversal process in the present invention.

FIG. 6 is an explanatory view showing a fifth step of the runner reversal process in the present invention.

FIG. 7 is an explanatory view showing the appearance of a large runner during transportation.

FIG. 8 is an explanatory diagram showing a state of attachment of the runner to a casing.

FIG. 9 is an explanatory diagram showing a first step of a conventional runner reversal process.

FIG. 10 is an explanatory diagram showing a second step of a conventional runner reversal process.

FIG. 11 is an explanatory diagram showing a third step of the conventional runner reversal process.

FIG. 12 is an explanatory diagram showing a fourth step of the runner inversion process in the related art.

FIG. 13 is an explanatory diagram showing a fifth step of the conventional runner reversal process.

FIG. 14 is an explanatory diagram showing a sixth step of the runner reversal process in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Runner 10a, 10b Block 10c Runner hole part 12 Vehicle 14 Casing 16a, 16b Hanging wire 18a, 18b Hook 20 Square member 22a, 22b Junkle 24 Inversion jig 26 Seat plate 28 Fitting attaching member 30 Bolt hole 32 Bolt 34 Hanging fitting 36 Metal fitting Mounting member 38 Hanging bracket 40 Hanging wire 42 Hanging wire 44 Buffer material

Claims (2)

(57) [Claims] 1. A seat plate that can be attached to a female screw of a runner hole for attaching a runner shaft of a large-sized runner using a male screw. The seat plate is provided on each of both sides of the seat plate and has strength enough to withstand the load of the runner. A reversing jig for a large runner, comprising: a wire suspension fitting. 2. A reversing jig provided with wire suspension metal fittings on both sides thereof is attached to a female screw for shaft mounting of a runner hole of a runner, and each suspension wire of the wire suspension metal fitting is engaged. A large runner characterized by individually raising and lowering with a crane, changing the posture of the runner from a horizontal position to a vertical position, and then pulling a hanging wire which was initially lower to reverse the posture of the runner. Inversion method.