RU180077U1 - DEVICE FOR PRELIMINARY ASSEMBLY AND WELDING OF PIPELINES - Google Patents

Abstract

The utility model relates to the field of pipe welding production, and in particular to devices for assembling for welding of steeply bent die-welded pipe bends from a plate in the form of radius grooves / shells (hereinafter referred to as “elements”) with their subsequent welding into a finished die-welded product. The device comprises a support-centering unit in the form of an annular frame 1. In the rim 2 of the frame there are clamps 3 for compressing the edges at the junction of the tap elements, providing a symmetrical application of large forces to the tap. At the base of the frame, guides 5 are mounted integral with it, in which the carriage 7 is moved on the rollers 6 with the rotation drive 8 of the C-shaped platform 9. The platform, on the roller bearings 10, can rotate radially relative to the axis of the shaft 11 of the rotation drive 8 separately from the frame without touching her. A slider 13 is pivotally mounted on the shaft 11 to slide in the guides 14 of the line 15. Along the guides 14 in the line 15, the base holes 16 are made for fixing the slider 13 with a pin 17 for transmitting torque to the platform 9 and rearranging the axis of the drive shaft. The base holes are made along the guides of the ruler and represent a scale of standard sizes of diameters of the processed bends. The carriage 7 is connected to the hydraulic cylinder 19 of its positioning by means of sensors 20 of its position relative to the base holes in the guides of the ruler 15. To receive and fix the elements of the outlet, the platform 9 is equipped with a package of radial support trays 22 laid in steps in the pyramid 21. 3 ill.

Description

The utility model relates to the field of pipe welding production, and in particular to devices for assembling for welding of steeply curved thick-walled pipe bends.

As is known from the prior art, the construction of large-diameter metal pipelines cannot do without a flow reversal. Therefore, radius bends for pipes made under industrial conditions are usually used.

Known devices used for pre-assembly and welding of sectional branch pipelines for AS SU:

625889, IPC V23K 37/04, from 05.04.76, publ. 09/30/78;

1292965, IPC V23K 37/04, dated 11/14/84, publ. 02/28/87,

as well as patents of the Russian Federation:

2103138, IPC V23K 37/04, dated 05/07/1996, publ. 01/27/1998;

2252849, IPC V23K 37/04, dated April 29, 2002, publ. 05/27/2005;

2271268 IPC V23K 37/04, dated 12.04.2004, publ. 03/10/2006.

A common feature of each of the known devices is determined by the design of the bends and consists in the fact that the bends in the devices are assembled from the shells of annular sectors made of pipes. These devices provide sequential docking of sectors with each other by butt welding to obtain finished sectional branches with a broken geometric axis.

A disadvantage of the known devices is their ability to perform sectional bends only with a broken geometric axis, for which the devices have special means for joining and pressing precisely the edges of the sectors for welding directly their circumferential seams.

With the advent of an alternative technology for producing stamped elements / semi-tubes of bends from a plate, in the form of radially steeply curved grooves / shells (hereinafter referred to as “elements”) with their subsequent welding into a finished die-welded product, the known devices were not applicable. Therefore, the problem arose of creating special devices for joining the longitudinal edges of such semi-tubes and pre-assembling them on welded tacks in the side of the outlet for subsequent welding.

The closest in technical essence and the achievement of a positive result as a prototype adopted a known device for joining and welding of longitudinal seams of shells on.with. SU No. 1513769 IPC V23K 37/04 of 08/02/1985, publ. 11/27/1996.

The device comprises a support-centering unit mounted on the base, made in the form of a rigid crimp demountable frame. The upper part of the frame is removable, and the lower part is made in the form of a support tray. Both parts are connected by bolts with the possibility of pairing with the outer surface of the shell of a certain diameter. The device as a whole is a means of transverse elastic compression of the junction of the longitudinal edges of the shell, the clamps of which are made in the form of bolts, tightening the upper and lower parts of the specified node. Belleville springs are installed under the bolts, allowing you to adjust the compression force of the shell. As a result, by increasing the accuracy of a given transverse compression force of the joint, the device minimizes residual welding stresses and strains while improving the quality of welding.

A disadvantage of the known device is its limited use only for welding one standard size of the diameter of the shells. In the case of welding shells of other diameters, a separate device is required for each size.

The objective of the proposed technical solution is to develop a device that allows to expand its technological capabilities, providing for a preliminary joining and assembly of stamped elements in the edges of the bends on welded tacks in a wide range of diameters and wall thicknesses for subsequent high-quality welding of their longitudinal joints.

The essence of the proposed technical solution is that in the device for pre-assembly and welding of die-cut bends for pipelines, containing a centering unit mounted on the base with adjustable lateral compression clamps of the joint of the longitudinal edges of the welded shell and with the support tray, new is that

the centering unit is made in the form of a vertically mounted power annular frame, in the rim of which are mounted adjustable clamps for the transverse compression of the longitudinal edges of the outlet shell,

the clamps are made in the form of at least four movable pressure stops installed in pairs symmetrically to the axes of the diameter of the rim of the frame ring with the possibility of transmitting the pulling force to the edge portion of the stamped shell elements of each branch in the range of its standard sizes,

in the opening of the frame ring is installed horizontally on roller bearings, a rotary platform, the bearing surface of which is made Corresponding, able to move inside the frame ring without touching it,

on the platform in the form of a stepped pyramid a set of support trays is installed, each of which is made with the possibility of accurately placing on it a tap of the corresponding diameter from the range of its standard sizes,

horizontally rectilinear rails are mounted in the base of the rim of the frame ring along the tangent, integral with it, in which the carriage is mounted on the rollers, which carries the platform rotation drive, on the shaft of which a slider with a hole for a special pin is pivotally mounted,

on the platform, in one piece with it, are made in the form of a ruler response straightforward guides for the sliding movement of the specified slider,

the carriage is connected to the hydraulic cylinder for its movement and / or positioning, with the possibility of rearranging the axis of the drive shaft, by fixing the specified slide with a special pin in the base holes made along the guides of the above line.

Other features of this device according to the utility model include the following:

the pressure stops of the above clamps are mounted on the rods of the power cylinders mounted with the possibility of symmetrical mobility for applying a radial force of pulling together the elements of the outlet;

at least three of the four stops are installed with the possibility of direct pairing with the outer surface of the branch;

the pressure stop of the lower power cylinder is mounted with the possibility of a radial application of the pulling force and support of the platform from the deflection of its bearing surface so that the line of action of the force on the tap surface passes through the platform and the package of support trays;

base holes are made along the axis of the guides of the ruler with a certain step from each other and represent a scale of standard sizes of diameters of bends, and the number of these holes in the ruler of the platform corresponds to the number of standard sizes of diameters of the processed bends;

supporting trays are installed in the pyramid package steps from bottom to top in order to reduce the diameter of the outlet;

the pyramid of the support trays in height can be adjusted in such a way that the placement of each branch from the range of its standard sizes in the shell shell provides a concentric alignment of the geometric axes of the branches and the central axis of the frame ring;

platform platform supports are installed with the possibility of rolling on a metal sheet flooring of the workshop floor;

the swivel connection of the slider with the drive shaft is made by means of a cardan joint to compensate for possible distortions when the platform is rotated;

the slider, in essence, is a carrier installed with the possibility of transmitting torque, and the hole for fixing a special pin is made on the end section of the departure of his shoulder, while each position of the platform fixed by the slider in the guides of the ruler determines the radius of its rotation relative to the axis of the drive shaft, matching with the radius of the geometric axis of each branch.

The technical result consists in the universal expansion of the technological capabilities of manufacturing die-welded bends of predominantly thick-walled pipes in a wide range of standard diameters. At the same time, the elimination of deformations arising during welding and the compensation of transverse shrinkage of welds during welding are maximally ensured.

An example of a specific implementation of the proposed device is presented in the drawings, where:

in FIG. 1 shows a General view of the device;

in FIG. 2. shows the position of the platform when reconfiguring the working diameter of the branch;

in FIG. 3 shows the platform in the loading position of the retraction elements on the support tray;

in FIG. 4 shows the position of the drive shaft with a slider in the guides of the platform ruler;

in FIG. 5 shows a cross-section of the guides of the drive carriage and the slider in a fixed position in section AA in FIG. four;

in FIG. 6 shows the ruler of the platform with a scale of standard sizes of diameters of the processed bends on leader B.

The device comprises a support-centering unit mounted vertically on the base in the form of a ring-type frame 1, which is a supporting power structure. In the rim 2 of the frame ring, clamps 3 of elastic transverse compression of the longitudinal edges at the junction of the tap elements are installed. The clamps 3 are made in the form of four movable pressure stops 4 mounted on the rods of the power cylinders, pairwise along the axes of the diameter of the rim of the frame ring providing a symmetrical application to the removal of large forces.

At the base of the frame, along the tangent to the rim, mounted in one unit with it, guides 5, (mounted below the mark of the metal sheet flooring of the workshop), in which the carriage 7 is moved on the rollers 6 with the rotation drive 8 of the C-shaped platform 9.

The platform, at least on four roller bearings 10, can rotate, moving along the metal flooring of the workshop floor along the radius relative to the axis of the shaft 11 of the rotation drive 8 separately from the frame, without touching it.

A slider 13 is mounted on the drive shaft 11 (to compensate for possible distortions of the platform when it is rotated) by means of a cardan joint 12. The slide is slidably mounted in the guides 14 of the ruler 15 to transmit torque through the drive shaft to the platform 9. The ruler is made in one piece with the platform. Along the guides 14 in the ruler 15, base holes 16 are made for fixing the specified slider 13 with a special pin 17. The base holes are made along the guides of the ruler with a certain step from each other and represent a scale of standard sizes of the diameters of the bends, and the number of holes in the ruler of the platform corresponds to the number of standard sizes of the processed bends. The slider with the carriage with the fixed position of the platform determines the radius of its rotation relative to the axis of the drive shaft, which coincides with the radius of the geometric axis of the outlet. In this case, the slider, in essence, is a carrier installed with the possibility of rearranging the axis of the drive shaft, and the hole 18 for fixing a special pin is made at the end section of the departure of its shoulder. The carriage is connected to the hydraulic cylinder 19 of its movement and positioning in the guides of the ruler. Along the guides 5 of the carriage 7, sensors 20 of the coaxial position of the holes 16 and 18 of the slider and the ruler mating with the pin 17 are installed.

To receive and fix the tap elements on the platform, the latter is equipped with technological equipment in the form of a stepped pyramid 21 of radial support trays 22 stacked by the package, including respectively a complete set of diameters of the processed bends.

At least three pressure stops are installed with the possibility of direct contact with the outer surface of the elements of the shell of the outlet.

And the lower pressure stop is the power cylinder of the platform support from deflection, since the carrier plane of the platform and the roller bearings are not designed for the loads from the upper clamps. In this case, the line of action of the force of the lower stop cylinder on the outlet surface passes through the bearing surface of the platform and the package of support trays.

At the moment of turning on the hydraulic cylinder 19 for positioning the carriage, there is a danger of moving the platform together with it due to the friction of the slide in the guides of the ruler. Therefore, the buffer 23 is provided on the platform and the positioning roller 24 in the frame body, which, interacting with the buffer, keeps the platform from moving at the moment carriage movements.

The device operates as follows

To assemble the elements of the tap of a given diameter by turning the platform 9 provide a coaxial arrangement of the longitudinal axes of the guides 14 of the ruler 15 and the guides 5 of the carriage 7 of the drive of its rotation 8 (Fig. 2).

The rods of the pressure stops 4 of the power cylinders of the clamps 3 are retracted.

The hydraulic cylinder 19 moves the carriage until the sensor 20 of the predetermined position is triggered, while the shaft 11 of the platform rotation drive is positioned by axially aligning the holes of the slider 13 and the ruler 14.

With a special pin 17, the slider is manually fixed in the base hole 16 of the ruler with the diameter of a specific standard size of the outlet. Then, to load the tap elements, the fixed platform is turned to one of the extreme positions outside the frame ring (Fig. 3).

On the platform 9, a support tray 22 is installed in the pyramid 21, the height corresponding to the standard size of the diameter of the branch and the lower element of the branch is placed in the tray. In this case, the pyramid of the support trays in height can be adjusted in such a way that the placement of each branch from the range of its standard sizes in the shell shell provides a concentric alignment of the geometric axes of the branches and the central axis of the frame ring.

Install the upper element / half / elbow symmetrically symmetrically. The joints of the edges prepared for welding from the ends of the outlet elements are fixed from displacement by technological clamps (not shown in the drawings). By turning the platform from the extreme position, the outlet is moved to the zone of elastic transverse compression of the joint.

Starting from the end of the branch, the joints of the elements align and tighten their edges with the use of force compression by vertical and horizontal pressure stops 4. Perform welded tacking of the edges along the outer and inner generatrix of the branch elements in this place.

Then, sequentially, freeing from lateral compression and turning the bend in the horizontal plane, again applying pulling forces, tacking is carried out in a certain step along the entire length of the bend forming, and the platform again returns to one of the extreme positions. The tap assembled on welded tacks is removed from the platform and sent to the final welding of its longitudinal seams.

If it is necessary to handle the removal of another standard size from the designated range to rearrange the axis of the drive shaft, the platform is again turned until the ruler axis aligns with the axis of the guides of the rotation drive carriage, the carriage is extended and the corresponding radius of rotation of the platform in the base hole of the ruler is fixed with a special pin.

Then the device is brought to its initial extreme position and a support tray corresponding to its diameter is installed in the pyramid package. Moreover, the height of the package is made so that the movable pressure stops are always aligned with the cross section of the branch.

As a result, the proposed technical solution according to the utility model has signs of novelty, has been sufficiently designed and is ready for use in the production of welding of fillet-welded bends with a high demand on the quality of welds with diameters from ∅530 to ∅1436 mm and wall thicknesses from 10 to 68 mm.

Claims (16)

1. A device for assembly for welding of die-welded pipe bends, comprising a centering unit mounted on the base with adjustable lateral compression clamps for the joint of the longitudinal edges of the welded pipe bend and with support trays, characterized in that the centering unit is made in the form of a vertically mounted power annular frame, in the rim of which are mounted adjustable clamps for the transverse compression of the longitudinal edges of the outlet shell, while the clamps are made in the form of four movable pressure stops mounted on the rods of the power cylinders and mounted in pairs symmetrically to the axes of the diameter of the rim of the frame ring with the possibility of transmitting the pulling force to the edge section of the stamped shell elements of each branch in the range of its sizes, in the ring aperture of the said frame, a C-shaped rotary platform is horizontally mounted on roller bearings with the possibility of its movement inside the frame ring without contact with it, supporting trays are installed on the platform in the form of a step pyramid, each of which is made with the possibility of accurately placing on it a tap of the corresponding diameter from the range of its standard sizes, and horizontally rectilinear guides are mounted at the base of the rim of the frame ring along the tangent, in one piece with it, in which a carriage is mounted that carries the drive for turning the platform, on the shaft of which a slider with a hole for the pin is pivotally mounted, and on the platform, in one piece with it, are made straight line guides for sliding movement of the specified slider, and the carriage is connected to the hydraulic cylinder for its movement and positioning with the possibility of rearranging the axis of the drive shaft by fixing the specified slider with the mentioned pin in the base holes made along the guides of the above line. 2. The device according to p. 1, characterized in that the power cylinders are mounted with the possibility of symmetrical mobility for the application of a radial force pulling together the elements of the tap. 3. The device according to claim 1, characterized in that three of the four stops are mounted with the possibility of direct interfacing with the outer surface of the outlet. 4. The device according to p. 1, characterized in that the pressure stop of the lower power cylinder is mounted with the possibility of radial application of pulling forces and support of the platform from the deflection of its bearing surface so that the line of action of the force on the tap surface passes through the platform and the package of support trays. 5. The device according to p. 1, characterized in that the base holes are made along the axis of the guides of the ruler with a given step from each other and represent a scale of standard sizes of diameters of the bends, and the number of these holes in the ruler of the platform corresponds to the number of sizes of diameters of the assembled bends. 6. The device according to p. 1, characterized in that the support trays are installed in the pyramid steps from bottom to top in order to reduce the diameter of the outlet. 7. The device according to p. 1, characterized in that the pyramid of the support trays in height is installed with the possibility of placing in the shell shell of each branch from the range of its sizes and provides a concentric alignment of the geometric axes of the branches and the central axis of the frame ring. 8. The device according to p. 1, characterized in that the roller bearings of the platform are installed with the possibility of rolling on a metal sheet flooring of the floor of the workshop. 9. The device according to p. 1, characterized in that the slider is a carrier installed with the possibility of transmitting torque, and the hole for fixing the pin is made at the end section of the departure of his shoulder, while each position of the platform fixed by the slider in the guides of the ruler determines its radius rotation relative to the axis of the drive shaft, coinciding with the radius of the geometric axis of each branch. 10. The device according to p. 1, characterized in that the swivel of the slider with the drive shaft is made using a cardan joint to compensate for possible distortions when the platform is rotated.

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