JPH09301673A - Large diameter pipe lifting metal fittings - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lifting metal fitting for attaching a wire to the pipe itself without welding a hanging piece or the like to the pipe for lifting large diameter pipes during piping work. . [Structure] A lower brace plate 11 having a pedestal 12 at the bottom and a pair of brace plates 14 provided via respective ends of the brace plate and a hinge 13 are provided on the outer peripheral side of the side brace plate 14. A suspension piece 15 is provided, and the other end of the hinge 13 can be attached and detached by tightening bolts 16 to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting metal fitting for hanging a wire, which is attached to the pipe itself when hoisting a large diameter pipe in piping work.

[0002]

2. Description of the Related Art Conventionally, in piping work, when hoisting a pipe for transportation, alignment of a groove, etc., as shown in FIG. . However, this method requires a high hanging margin H in order to reduce the tension applied to the wire. That is, when the hanging allowance H is made small, the elevation angle θ becomes large, so that the tension of the wire 21 becomes large, and the interval L between the wires wound around the tube 10 shifts and becomes small, resulting in an unstable state. Therefore, the diameter of the pipe is 500m
When hoisting a large-diameter pipe of m or more, it is necessary to set a high hanging allowance H, and when the space in the height direction is limited due to a ceiling or the like at the site, a large number of insufficient hanging allowances occur. Therefore, in such a case, as shown in FIG. 4, the contact plate 23 is spot-welded to the pipe 10 to weld the suspension piece 15 or the suspension piece 15 is directly welded to the pipe 10. , The shackle 22 is attached to the suspension piece 15 to suspend the suspension wire 21.
Connect. This method can reduce the hanging margin H by at least the radius of the tube 10 as compared with FIG. However, tube 1
If the backing plate 23 and the hanging piece 15 are welded to 0, they must be gas-cut after the construction is completed, and post-work such as grinder hanging will occur after the gas cutting. Further, such welding or gas cutting causes residual stress in the pipe body. In addition, after these operations are completed, a bulging angle is laid under the pipe 10 for temporarily placing the pipe 10, and the pipe 10 is molded so as to contact the lower arc of the pipe 10 to prevent the pipe 10 from rolling. There is a troublesome work such as applying a shaku angle.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, makes it possible to reduce the hanging allowance for hoisting a pipe, and eliminates the need for welding or post-working on the pipe. It is to provide a large-diameter pipe lifting metal fitting that does not require the shaku angle to be laid under the temporary storage.

[0004]

In order to solve the above-mentioned problems, the present invention is a band plate which is formed in a cylindrical ring shape as a whole so as to surround the entire outer peripheral surface of a pipe and is divided into three parts. And a pair of side band plates provided via respective hinges of the lower band plate and hinges, the pair of side band plates being provided on the outer peripheral side thereof. The hinges are provided with screws, and the other ends of the hinges can be attached to and detached from each other by bolting.

[0005]

Next, the present invention will be described more specifically based on examples. 1 is an overall perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a plan view thereof. The hoisting metal fitting according to the present invention comprises a band plate divided into three, that is, one lower band plate 11 and a pair of side band plates 14, and surrounds the entire outer circumference of the pipe 10 as a whole. It is formed in a cylindrical ring shape.

Lower strip 1 abutting the lower portion of tube 10.
1 includes a pedestal 12, both ends of which are connected to a pair of side band plates 14 by hinges 13. Each of the side band plates 14 is provided with a hanging piece 15 on the outer peripheral side, and the other end side of the hinge 13 can be attached and detached by tightening bolts 16 to each other. In addition, the lower brace 11 and the pair of side brace 1
A curing sheet 17 having a large friction coefficient is lined inside 4 to prevent slippage during construction and protect the pipe 10.

With the above structure, the pipe 10 is hoisted as follows. First, as shown in FIG. 2, the right side band 14 of the hoisting metal fitting of the present invention is opened like the left side. The tube 10 is then placed on the lower strip 11 and the side strip 14 is closed and tightened with bolts 16. Next, as shown in FIG. 1, the shackle 22 is connected to the suspension piece 15 and is suspended by the wire 22. Next, the pipe 10 is transferred, but since the pedestal 12 is provided for temporary placement for the transfer, it is not necessary to prepare a horn or the like.

[0008]

As described above, the large diameter pipe hoisting metal fitting of the present invention has a small hoisting allowance when hoisting a pipe.
Moreover, since it is not necessary to weld the backing plate and the suspension piece to the pipe, gas cutting after the construction is unnecessary and residual stress does not occur. Furthermore, there is an advantage that a clinker is not required for temporary temporary placement and safe work can be performed.

[0009]

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the above.

FIG. 3 is the above plan view.

FIG. 4 is a perspective view showing an example of a conventional technique.

FIG. 5 is a perspective view showing another example of the prior art.

[Explanation of symbols]

 10 ... Pipe 11 ... Lower Wing Plate 12 ... Pedestal 13 ... Hinge 14 ... Side Wing Plate 15 ... Suspension Piece 16 ... Bolt, Nut 17 ... Curing Sheet 21 ... Wire 22 ... Shackle 23 ... Attachment plate 24 ... Hook

Claims (1)

[Claims] 1. A lower strip having a pedestal at a lower portion thereof, which is formed into a cylindrical ring as a whole so as to surround the entire outer circumference of the pipe and is divided into three parts. It is composed of each end and a pair of side brace plates provided via a hinge, the pair of side brace plates are provided with a hanging piece on the outer peripheral side thereof, and the other end sides of the hinges are mutually bolted. A large diameter pipe lifting metal fitting characterized by being removable by tightening.