JPS61126996A - Flange assembling device - Google Patents

Abstract

PURPOSE:To absorb the quantity of irregularity in inner diameters of a pipe and flange so as to maintain a root gap accurately, by fixing the pipe and flange by means of rigid rubber pieces and trapezoidal sections provided at the outer periphery of angular guide sections. CONSTITUTION:Connecting pieces 5 and a bottom receiving plate 6 coupled with three angular guide sections 3 by means of a pin 7 are inserted into a pipe 2 so that the trapezoidal projected section (a) of each guide section 3 is allowed closely to contact with the end section with beveling of the pipe 2. A flange 1 is assembled by moving the left stopping end sections of the guide sections 3 inward and the pipe 2 and flange 1 are allowed closely to contact with the rigid rubber 4 of the guide sections 3. Then the guide sections 3 are inserted into the tapered groove (c) of a core section 9, into which a tightening adjusting bolt 10 which has been adjusted so that it can contact the slide bearing 8 of the bottom receiving plate 6 is screwed, and the flange 1 and pipe 2 are uniformly fixed onto the same axis by turning the bolt 10. Therefore, appropriate beveling dimensions can be maintained easily without a variance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is an apparatus suitable for assembling pipes and flanges of piping, which requires high pressure and ura-nami (complete welding) welding.

[Background of the invention]

Conventionally, this type of flange assembly equipment has been used, for example, in
As shown in Publication No. 8-38501, by inserting vertically divided pieces of a cylinder into the inside of the tube, passing them through the inside of the metal pieces, and installing an annular spring inside, all the divided pieces are attached to the inner diameter of the tube. A method is known in which all the divided pieces are fixed to the pipe and the inner diameter part of the flange by tightening the tapered push pieces.

However, it is difficult to compensate for the amount of misalignment between the inner diameter of the tube and the flange, and there are drawbacks in that it is difficult to ensure the groove gap size required to obtain a high-quality weld.

[Purpose of the invention]

This invention was made based on the above-mentioned points, and it is possible to absorb the amount of misalignment in the inner diameter dimensions of the tube and flange, to obtain a stable and high quality welded part, and to be able to accommodate individual differences and groove gap dimensions. The object of the present invention is to provide a flange assembly device that can be easily assembled without any variation in the flange.

[Summary of the invention]

The features of the flange assembly device of this invention are as follows:
To obtain high-quality welds, ensure bevel accuracy.

In particular, we focused on the root gap and the amount of misalignment, and the hard rubber provided on the guide part absorbs the misalignment, and the trapezoidal protrusion is configured to maintain the root gap with high precision.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. 1 is a flange, 2 is a tube, hard rubber 4 is glued on both sides of a trapezoidal protrusion a on the outside, and a guide part 3 with a taper b on the inside connects the joint piece 5 and the bottom support plate 6 with a bottle 7. connected. Therefore, the structure is such that the guide portion 3 can be freely varied with respect to the inner diameter of the tube 2. In addition, the flange 1 and the pipe 2 are fixed by tightening the core metal part 9, which has a threaded part d inside the taper groove C1 into which the guide part 3 is fitted on the outside, through the adjustment bolt 10. are mechanically connected and tightened.The adjustment bolt 10 is supported by a thrust bearing 8 provided on the bottom support plate 6, and the tightening is performed by slightly moving the core part 9 left and right by giving rotational motion to the adjustment bolt. let me,
In order to fix and loosen the flange 1 and the pipe 2, the structure is such that the core metal part 9 integrated with the bolt 10 can be easily attached and detached for tightening.

Next, the operation of this embodiment will be explained.

During the work, the joint piece 5 and bottom support plate 6 connected to the guide part 3 with the pin 7 are attached to the pipe 2 so that the trapezoidal protrusion a of the guide part 3 is brought into close contact with the bevel-formed end of the pipe 2. After inserting it inside, the left end of the guide part 3 is moved inside and the flange 1 is assembled.

After the guide part 3 is brought into close contact with the inner diameter part of the flange 1, the tightening adjusted to contact the thrust bearing 8 of the bottom receiving plate 6 is performed using the tapered groove C of the core metal part 9 where the adjustment bolt 10 is assembled.
Insert the guide part 3 into the tube and tighten by turning the adjustment bolt 10 to fix the flange 1 and the pipe 2 uniformly and coaxially.

〔Effect of the invention〕

As described above, according to the present invention, since the guide part is configured to have a trapezoidal protrusion with an appropriate gap size that allows hard rubber and urana (complete welding) welding, there is no misalignment between the flange and the pipe. , it is possible to easily maintain the appropriate groove size without any variation, and therefore it is effective to obtain a stable and high quality welded part.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a flange assembly apparatus according to the present invention, and FIG. 2 is a sectional view taken along line mA-A in FIG. 1...Flange, 2...Pipe, 3...Guide part, 4
...hard rubber, 5...joint piece, 6...bottom support plate, 7
... Bin, 8... Thrust bearing, 9... Core metal part, 10... Tighten 81M bolt. a... Trapezoidal protrusion, b... Taper, C Fig. 1 C Kz Fig.

Claims (1)

[Claims] A removable device consisting of three rectangular guide parts with two joints, a tapered part on the inside and a hard rubber and trapezoidal protrusion on the outside, a core metal part with a taper groove that fixes the guide parts, and a tightening adjustment bolt. A flange assembly device that is easy to assemble and also serves as a constraint for pipes and flanges.