RU1828981C - Bellows expansion joint - Google Patents

Abstract

The inventive bellows compensator consists of a bellows 4. connected to the flange 3 by means of a flanged cylindrical part 6, in the cavity of which the sleeve 8 is tightly mounted, the shoulder of which and the end of the bellows 9 are welded by a common seam to the front or back end of the flange 3 or the sleeve covering the portion of the bellows and placed with it in an annular groove of the back of the flange. 3 C.p. fs, 4 ill.

Description

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The invention relates to general mechanical engineering, in particular to constructions of bellows expansion joints for pipelines, in particular to nodes for connecting a thin-walled bellows flange to thick-walled walls of a compensator nozzle or flange.

The purpose of the invention is to increase the reliability and simplify the manufacturing technology of the compensator.

The invention has the following salient features.

The compensator flange is equipped with a conical hollow shaft connected to its rear end with a large base and the sleeve is made with a conical surface, the top of the cone of which is directed from its shoulder, and the bellows rim is placed between the shaft and the sleeve without radial clearance, and its flanged part is fastened to the shoulder bushings and the end face of the flange with a common weld.

In this case, the compensator bellows rim is placed in the bore of the sleeve and its flanged part is connected by a common weld to the sleeve collar and the back of the flange.

In addition, the flanged portion of the bellows rim can be made with a cylindrical section coaxially covering the sleeve and placed in the hole of the flange.

Figures 1 and 2 show a compensator with a bellows collar located in an opening of a flange and a sleeve; Fig. 3 shows a compensator with a coaxially flanged bellows collar; figure 4 - compensator with a flange equipped with an annular groove.

The bellows expansion joint for pipelines comprises a connecting flange 1 with a conical expanding pipe (liner) 2 and an end 3 and a bellows 4 with a collar 5 provided at the end with a radial flange 6, as well as an inner sleeve 7 connected to the collar 5 with an expanding liner 8. The output edge 9 of the bellows flange is connected to a common weld 10c with the end face 3 of the flange and with the radial edge of the sleeve 7.

The side 5 with a radial flange 6 of the bellows can be located outside the flange 1 in the hole of the outer sleeve 11 connected by a weld 10 to the back side 12 of the flange 1.

The sleeve 13 can be made cylindrical mating with the outer 14 and inner 15 coaxial portions of the bellows rim located in the hole of the flange 16 of the straight section.

Flange 27 can be made with an annular groove 18 located on the back side, including a sleeve 13 with associated coaxial sections

bellows rim.

The bellows compensator is made as follows. Initially, the collar 5 of the bellows 4 and the shanks 2 and 8 of the flange 1 and the sleeve 7 are made cylindrical. A flange 1 is mounted on the cylindrical flange 5 and then a radial flange 6 of the flange 5 is formed. After that, a sleeve 7 is pressed into the flange of the flange 5 and the output edge 9 of flanging 6 is metically connected with flange 1 and sleeve 7. In this case, the usual 2-4 mm electrodes and welding equipment. After welding, a joint conical flange (expansion) of the shanks 2 and 8 of the flange 1 and the sleeve 7 with the side 5 of the bellows 4 is carried out.

In a similar manner, a compensator with an outer sleeve 11 is manufactured.

5 (see Fig. 2), where the flange 1 is installed after the sleeve 11 and the radial flanging of the side 5 of the bellows 4.

The compensator cylindrical sleeve 13 is made as follows. On the

0 the side 15 of the bellows 4 externally install the sleeve 13 and carry out its radial and cylindrical coaxial flanging 14. After that, the flange 16 is pressed into the flange 14 and the weld 10

5, connect the output edge of the bellows flange 14 with a flange 16 and a sleeve 13. In a similar manner, a compensator (see Fig. 4) is made in which the flange 17 is provided with an annular groove 8.

0 The advantages of the invention compared to the prototype described in U.S. Patent No. 2,434,204 are as follows.

The thin-walled bellows nozzle 5 is connected with thick-walled flanges by one common weld seam including the edge of the bellows nozzle, the walls of the latter being located between the mating surfaces of the flanges pressed between them.

Conventional technology and equipment are used to make a weld including the edge of the bellows nozzle. All this simplifies the manufacturing technology of the bellows expansion joint and increases its reliability.

Claims (4)

SUMMARY OF THE INVENTION 1. A bellows expansion joint for pipelines comprising at least one connecting fitting one flange and a bellows, the flange of which has a flange and, by welding, is fastened to the connecting end of the flange, a collar with a collar connected to the flange of the bellows, characterized in that the flange is equipped with a conical hollow shank fastened to its rear end with a large base, the sleeve is made with a conical surface the top of the cone which is directed from its shoulder, while the bellows rim is placed between the shank and the sleeve without radial clearance, and its flanged part is fastened to the sleeve shoulder and the end of the flange about conductive weld 0 2 Compensator pop characterized in that the bellows rim is placed in the bore of the sleeve, and its flanged part is fastened with a weld with the collar of the sleeve and the back of the flange 3. The compensator according to claims 1 and 2, with only one and so on. that the flanged part of the bellows flange is made with a cylindrical section coaxially covering the sleeve and placed in the hole of the flange. 4. The compensator for pl. 1-3. This is due to the fact that an annular groove is made at the rear end of the flange, in which a flanged part of the bellows rim with a cylindrical section is placed / 2 FIG. 2 Fig.Z Fig L