JP3344948B2 - Valve removal jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve removing jig used to remove a valve laid along with a pipeline.

[0002]

2. Description of the Related Art When it is necessary to replace a valve laid in a pipeline for some reason, a bolt / nut in which the ground in which the valve to be replaced is buried is excavated and a flange of the pipeline and the valve are fastened. To remove the valve from the line.

[0003]

However, since it is extremely difficult to move the buried pipe in the axial direction, it is necessary to remove the valve laid together with the pipe by using a pipe-side flange and a valve-side flange. The wedge was hammered in between, and the pipe side was beaten with a hammer while lifting the valve with a chain block or the like, forcibly removing it.

[0004] Therefore, the prior art requires not only excavation work and valve removal work, but also the suspension of a scaffold and chain block for lifting the valve, and the swinging of a hammer at the excavation site, which requires extra equipment and labor. And left a problem in terms of security.

[0005] In view of the above-mentioned problems of the prior art, the present invention does not require extra equipment and labor such as suspension of a scaffold and a chain for lifting a valve, and swinging of a hammer at an excavation site. An object of the present invention is to provide a valve removal jig that can be secured.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outer cylinder and an inner cylinder that are slidable in the axial direction with each other so as not to rotate. In each case, the claw pieces are projected at right angles to the axis and in the same direction, and the outer cylinder and the inner cylinder are moved by the thrust generated when the screw is rotated to widen the gap between the claw pieces. This is a configuration in which:

[0007] With the above configuration, the valve laid together with the pipeline can be easily and safely removed without using any extra equipment.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a valve removing jig according to a first embodiment of the present invention.
The outer cylinder 1 and the inner cylinder 2 are fitted by the rotation stopper 3 so as not to slide (rotate) in the circumferential direction but to slide only in the axial direction.

The rotation stopper 3 fixes the fin-shaped rod 4 to the outer cylinder 1 along the surface of the inner cylinder 2, and a key (not shown) between the inner cylinder 2 and the fin-shaped rod 4. A groove is provided.
The outer cylinder is prevented from co-rotating so that it can slide only in the axial direction.

A nut 5 is provided at an end of the outer cylinder 1,
A bolt 6 is screwed into the nut 5, extends from the inside of the outer cylinder 1 toward the inside of the inner cylinder 2, and has a tip abutting against a pressure receiving piece 7 provided inside the inner cylinder 2.

The outer cylinder 1 and the inner cylinder 2 are provided with claw pieces 8 which are perpendicular to the axis and protrude in the same direction, and a striking catch 9 protrudes in the opposite direction from which the claw pieces 8 protrude. I have.

Next, an operation of removing the valve 13 from the pipe by the valve removing jig 10 will be described.
The bolt / nut 15 which fastens the flange 12 of the pipe end 11 to the flange 14 of the valve 13 is removed, and the interval between the claw pieces 8 of the valve removing jig 10 is adjusted so that the flange 12 of the pipe end 11 and the flange 14 of the valve 13 are joined. The valve 13 for removing the valve removing jig 10 in accordance with the gap 16
Of the nail piece 8 while applying it from both sides of the
A belt 17 separately prepared outside the valve 13
Is fixed.

In this state, the striker 9 projecting to the opposite side of the claw piece 8 is hit with a hammer to drive the toe of the claw piece 8 into the gap 16, and then the bolt 6 of the valve removal jig 10 fixed to both sides of the valve. Are alternately rotated in a well-balanced manner and propelled, the tip of the bolt 6 pushes the pressure-receiving piece 7 of the inner cylinder 2, and the inner cylinder 2 and the outer cylinder 1 move outward from each other. The distance between the flanges 12 is expanded so that the valve 13 can be removed.

FIG. 3 shows a second embodiment. A male screw 33 is provided on the outer periphery of the inner cylinder 32, and a key groove 34 is cut in the axial direction. A key 36 is fitted into the inner surface of the outer cylinder 31, and the inner cylinder 32 is axially slidably fitted to the outer cylinder 31 so as not to rotate.

A nut 35 is screwed into a male screw 33 provided on the outer periphery of the inner cylinder 32. By turning the nut 35, the nut 35 pushes the end of the outer cylinder 31 to press the outer cylinder 31.
The inner cylinder 32 and the outer cylinder 3
The space between the claw pieces 38 attached to the bracket 1 is widened.

FIG. 4 shows a third embodiment. In this embodiment, a turnbuckle mechanism is provided. A right female screw 45r and a left female screw 45l are integrally provided at both ends of an outer cylinder 41, and a key groove 44 is formed in each of the right female screw 45r and the left female screw 45l. Right male screw 43r and left male screw 43
are screwed into each other, and a right screw shaft 49r and a left screw shaft 49l projecting from the right female screw 45r and the left female screw 45l are provided with a key 4 on the inner surface.
6 is inserted into the inner cylinder 42 in which the inner tube 6 is inserted, and the tip thereof is in contact with a pressure receiving piece 47 provided inside the inner cylinder 42. In this embodiment, when the outer cylinder 41 is rotated, the right and left male screws 43r and 43l in which the key groove 44 is cut by the right and left female screws 45r and 45l provided at both ends are propelled to both sides without rotating. Since the tip of the inner tube 42 is in contact with the pressure receiving piece 47 inside the inner cylinder 42, the inner cylinder 42 moves to both sides, and the interval between the claw pieces 48 is increased.

[0017]

As described above, according to the present invention, the valve laid together with the pipe can be easily and safely removed without requiring any extra equipment.

[Brief description of the drawings]

FIG. 1 is a partially cutaway top view of a first embodiment according to the present invention.

FIG. 2 is a work explanatory diagram according to the first embodiment.

FIG. 3 is a top view showing a main part of the second embodiment.

FIG. 4 is a top view showing a main part of the third embodiment.

[Explanation of symbols]

 1,31,41 Outer cylinder 2,32,42 Inner cylinder 3 Rotation stop 4 Fin-shaped rod 5,35 Nut 6, Bolt 7,47 Pressure receiving piece 8,38,48 Claw piece 9 Strike receptacle 10 Valve mounting jig 11 Tube End 12 Flange (end of tube) 13 Valve 14 Flange (of valve) 15 Bolt / Nut 16 Clearance 17 Belt 33 Male screw 34,44 Key groove 35 Nut 36,46 Key 38,48 Claw piece 43r Right male screw 43l Left male screw 45r Right Female screw 45l Left female screw 49r Right screw shaft 49l Left screw shaft

Claims (1)

(57) [Claims] 1. An outer cylinder and an inner cylinder are slidable in the axial direction so as to be mutually slidable so as not to rotate, and each of the outer cylinder and the inner cylinder is perpendicular to the axis and directed in the same direction. A valve dismounting jig which protrudes a claw piece and moves the outer cylinder and the inner cylinder by a thrust generated when a screw is rotated to widen a gap between the claw pieces.