RU2261785C1 - Device for welding sectional piping branches - Google Patents

Abstract

FIELD: welding.

SUBSTANCE: device comprises rotatable spindle, bearing unit, and rolling bearing mounted on the base. The rotatable spindle is kinematically connected with the unit for securing branch pipe through the beam positioned at an angle to its longitudinal axis and whose one side is rigidly connected with the spindle. The branch pipe has race with screw clamps. The top housing of the bearing unit with the area is mounted for permitting vertical movement and co-operation with the end of the beam in working position. The beam is provided with adjusting units that comprise area with the race secured to it. The units are spaced and are at an angle to each other that is equal to the angle between the sections of the branch pipe. Each area of the adjusting unit is mounted on the bearing secured to the beam for permitting movement with respect to the bearings perpendicular to the secured section of the branch pipe.

EFFECT: expanded functional capabilities.

1 cl, 4 dwg

Description

The device for welding bends is designed for installation and rotation during the welding of sectional bends of large diameter pipelines (1.5-1.8 m) with a large mass (weight).

Known by application No. 2002111545 (publ. 10.11.2003), the device, in addition to advantages over known devices of the same purpose, also has disadvantages.

These disadvantages are due to the fact that securing the tap with a single clip mounted at the end of the beam is not reliable enough. The loading scheme, in which the entire load from the self-weight of the tap and cage, as well as the force of the impact of the roller on the tap secured in the cage, are concentrated at the end of the beam, is economically disadvantageous, since it entails an increased metal consumption in the manufacture of the beam and cage. In order to reliably fix the tap in one clip, it is necessary to apply great efforts to the tap, created by the screw clamps of the clip. This circumstance leads to rapid wear of screw pairs.

A significant disadvantage of the device according to this application is the impossibility of adjusting the position of the branch (together with the node for fixing) in order to ensure alignment of the spindle and the geometric axis of the section of the branch, the surface of which interacts with the roller rollers.

The need for this regulation arises when welding bends, in which the angle between the sections is different and differs from the standard.

The objective of the invention is the expansion of the technical capabilities of the device for welding sectional bends, in which the angles between the sections are not equal to the standard values (values).

The essence of the invention lies in the fact that the device for welding sectional bends, comprising a rotary spindle mounted on the base, a beam rigidly connected to the spindle, placed at an angle to the spindle, and a bearing assembly for securing the bend, which includes a clip with screw clamps in the assembly, is equipped with additional nodes. One of them is a support unit mounted on the base, the upper case of which with the platform fixed on it is mounted with the possibility of vertical movement and interaction in the working position with the end of the beam. The second node is mounted on the basis of the roller support with a roller mounted in the roller support with the possibility of adjustable interaction with the section of the outlet set in the clip.

The difference is that the device, which includes a clip with screw clamps in the assembly for securing the outlet, is equipped with two tuning nodes, each of which carries a clip fixed to it. The nodes are placed on the beam spaced and oriented at an angle between them, approximately equal to the angle between the sections of the outlet. Moreover, each site site, on which the clip is fixed, is mounted on supports fixed to the beam with the possibility of movement relative to the specified supports perpendicular to the fixed branch section.

The difference is that for moving the platforms of the tuning units with the clips attached to them, a movement mechanism is provided, made in the form of rotary axes mounted in the beam supports with eccentrically cylindrical cams articulated with the supports of the platform carrying the clip. In this case, one pair of beam supports with an axis mounted on them is installed on the beam platform with the possibility of moving along its surface when each of the two rotary axes is rotated, and one of each pair of rotary axis supports is made with screw locks that interact with the rotary axes in the working position.

Figure 1 shows the proposed device, a General view;

figure 2 partially shows the beam with one of the tuning nodes, bearing a clip;

figure 3 is a section aa in figure 1;

figure 4 - one of the elements of the tuning unit is a screw lock.

The device comprises a frame 1 mounted on the base, on which a spindle 2 is mounted in the bearing bearings with a faceplate 3 mounted on it. A beam 4 is mounted on the faceplate, oriented at an angle to the longitudinal axis of the spindle.

The device is equipped with a support unit 5 mounted on the base, the upper case 6 of which with the platform 7 fixed on it are mounted with the possibility of moving vertically. In the working position, the platform 7 interacts with the platform 8 fixed at the end of the beam 4.

The device is equipped with a roller support 9 mounted on the base, the roller 10 of which, when the spindle rotates, interacts with the surface of one of the sections of the outlet 11 fixed in the clips 12.

The device is equipped with two tuning units 13 mounted on the beam 4, bearing a clip 12 fixed on each node with rotary brackets 14 and screw clamps. The nodes 13 are placed on the console spaced and oriented to each other at an angle equal to approximately the standard angle between the sections of the outlet. The mechanism for moving the platform 15 of the node carrying the clip is made as follows. On the site 15, two pairs of supports 16 are rigidly fixed, coupled with cylindrical cams 17, which are eccentrically fixed on the rotary axes 18. The axes are mounted in two pairs of supports 19 and 20 mounted on the platforms 21 of the beam using screw fasteners. In this case, one pair of supports 19 and 20 is installed on platforms 21 made with grooves 23 for screws 22, and when the axes 18 are rotated, it is possible to move the specified pair of supports on the surface of platforms 21 of the beam.

Supports 19, located on the side of the staff, are made with screw clamps 24, interacting in working position with the axes 18 and fixing them from spontaneous rotation during operation of the device.

The device operates as follows.

Before installing an outlet assembled on electric grippers, replaceable supports 25 are installed in the cages of the required height. (The height of the supports 25 is set for a standard number of diameters of pipelines manufactured at domestic enterprises, and if the diameter of the pipeline for some reason does not correspond to the standard row, use mechanism 8 moving platforms 15). After installing the tap on the support 25 of the cage, located near the roller bearings, by turning the axes 18 provide a coaxial arrangement of the spindle and section 26, the surface of which during operation of the device will interact with the roller rollers. After securing the outlet in the cage closest to the roller bearing by installing the rotary brackets 14 in the working position, loading the screw clamps 27 and screw clamps 24, using the mechanism of the second tuning unit 13, attach the second clip to the branch section 28, that is, bring all the elements of the holder and the tuning unit into working position, as in the first clip. At the same time, using the mechanism for moving the platform 15 of the second node, they ensure that the platform is equidistant from the fixed branch section, which should be the same as in the node closest to the roller support. The distance from the platforms to the fixed sections is controlled by measuring on both sides of the cage with a measuring tool.

During the above operations for installing the outlet beam 4 platform 8 is based on the platform 7 of the support node 5.

The operation of the roller bearings 9 is carried out after securing the outlet in the clips 12, acting on a roller mechanism (not shown) by a screw mechanism, the roller 10 is pressed against the surface of the outlet section 26 with an force equal to, for example, half the weight of the outlet. After moving the support unit 5 to the inoperative position, the welder welds two joints located on both sides of the roller 10 of the roller support. In this case, the spindle rotates either with a welding frequency (the location of the welding electrode does not change), or with periodic switching on - turning off the drive.

After the welding of the above joints is completed, the spindle rotation drive is turned off in a position in which the beam platform 8 is in its lowest position. The support unit 5 is brought into the operating position, that is, the housing 6 is lifted with the platform 7 until it is in contact with the platform 8 of the beam, and the roller 10 of the roller support is lowered by the screw mechanism to the inoperative position. After translating the brackets 14 of the clips into an inoperative position by a lifting mechanism (not shown), the outlet is removed from the clips, rotated 180 degrees, and reinserted into the clips of the device. The transfer of the elements of the cage in working condition, loading the roller rollers, and other operations are carried out, as described above.

This ensures a more appropriate, from the point of view of saving metal, load distribution on the beam. In the proposed device, the beam and the tap secured in two cages perceive loads from their own weight, working together as a single rigid structure. In addition, it is possible to weld section bends of large weight and diameter, in which the angle between the sections differs from standard ones.

Claims (2)

1. A device for welding sectional tubular bends, comprising a rotary spindle mounted on the base, kinematically connected through a beam with a node rigidly connected to it by one side and placed at an angle to its longitudinal axis to secure the bend, including a clip with screw clamps, a support node, an upper the case of which with the platform fixed on it is mounted with the possibility of vertical movement and interaction in the working position with the end of the beam, and a roller mounted in the roller support with the possibility of p walkable interaction with the surface of one of the sections of the tap installed in the holder of the beam, characterized in that it is additionally equipped with two tuning nodes containing a pad with a clip attached to it, while the nodes are spaced and oriented to each other at an angle equal to the angle between the sections of the tap, each site of the tuning unit is mounted on supports fixed to the beam with the possibility of movement relative to the indicated supports perpendicular to the secured branch section. 2. The device according to claim 1, characterized in that for moving the platforms of the tuning nodes, a movement mechanism is provided, made in the form of rotary axes mounted in the beam supports with eccentrically cylindrical cams articulated with the supports of the platforms of the tuning nodes, with one pair of supports the beam, on which the rotary axis is mounted, is installed on the beam platform and when the axis is rotated, it moves the specified pair of supports on the surface of the platform, and the beam supports are made with screw clamps, acting in working position with rotary axes.

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