RU140080U1 - EXTERNAL PIPE CENTER - Google Patents

Abstract

1. The external pipe centralizer, containing arched sections and adjustable stops welded to them along the perimeter, while adjacent sections are connected to each other by means of an earring and a hook, fixed at their ends, and the ends of the first and last sections are connected by a connecting device, characterized in that the connecting device consists of two axes welded to the ends of the said sections with holes into which tightening bolts are inserted, while the stops are made in the form of two pairs of engagement plates with centralizer sections, welded two connecting plates to form a distance between each pair of plates, all six plates welded on both sides to high nuts to form arch space between the plates engaging with tsentratora.2 sections. The external pipe centralizer according to claim 1, characterized in that it is equipped with removable adjustable stops.

Description

The utility model relates to devices used in the construction and repair of pipelines to ensure alignment of the ends of the pipes during welding.

Centralizers of a similar purpose are known, containing two half rings with stops, the first ends of each half ring are connected by an axis, the second ends of each half ring are connected by a jack earring mounted on the first half ring, through a hook mounted on the second end of the second half ring (see, for example, Central hydraulic external centralizer http //www.sovitek.ru/centrator-n/cng.html, Centralized arch external hydroficated TsAN-G http://gazmashina.narod.ru/centrator7/htm, Centralized external hydraulic centralizer http://kremz.ru/centratorg .html.).

The closest analogue is the centralizer "TsNG (external hydroficated) light series" of the Kropotkin Engineering Plant. The centralizer consists of two arcuate sections connected by an axis and a hydraulic jack. Stops are welded to the arcs, with which the centralizer presses on the surface of the joined pipes. The stops are equipped with adjusting screws.

Centralizers of the TsNG series have a number of disadvantages.

1. A lot of weight, and, as a result, the inconvenience of working with it. All work has to be carried out using lifting mechanisms, and this reduces productivity.

2. The hydraulic jack reduces access to welded edges and visibility in this area.

3. The adjustment screws are located at a great distance from the welded edges, which increases the force required for the application in the axial direction.

4. When connecting pipes with a difference in the perimeter, the displacement is not distributed around the entire perimeter, but is concentrated between the stops.

The task to which this technical solution is directed is to increase ergonomic characteristics while simplifying the design and reducing the weight of the equipment for welding.

The problem is solved by an external centralizer, containing sections with stops, the first ends of each section are connected by a connecting device, the second ends of each section are connected by an earring fixed to the first section, through the hook mounted on the end of the other section, adjustable stops are welded to the sections, characterized in that the connecting device consists of two axes welded to the sections with holes in which tightening bolts are threaded, the centralizer is equipped with removable adjustable stops.

The stops are made in the form of two pairs of engagement plates with centralizer sections welded to two connecting plates to form the distances between the pair of plates, all six plates are welded on both sides to high (L = 3d) nuts, form an arched space between the engagement plates with centralizer sections, creating convenience during welding.

Adjustable stops are welded around the perimeter of the sections, and the device is also equipped with removable stops, which are installed as necessary in the right places.

Adjustable stops can be made with an arcuate profile corresponding to the diameter of the pipe, which increases the pressure on the surface of the pipes and increases the reliability of fixing the clamps on the pipe.

The tightening bolts connecting the ends of the sections are made with a large thread pitch.

The tightening bolts are mounted on the sides of the centralizer sections external to the joint.

Removable adjustable stops ensure their installation anywhere, including on the edges of the pipes for their reliable and accurate connection when welding.

Thus, the external centralizer has adjustable elements that ensure its reliable fastening on the pipe: these are tightening bolts connecting the centralizer sections, removable height-adjustable stops, also providing the ability to control the amount of pressing force to the pipe, as well as installing them in the right place.

The centralizer may consist of two, three or four (depending on the diameter of the centered pipe) sections connected by axes and hooks.

In FIG. 1 presents the inventive external centralizer, consisting of two sections (half rings).

In FIG. 2 shows an adjustable emphasis, which can be welded to the section, or can be made removable.

In FIG. 1 shows the inventive external centralizer, containing two half rings 1, 2 connected by an earring 3 and a hook 4, on the one hand, with adjustable welded stops 5, each half ring 1 and 2 is made in the form of one segment, the other ends of the half rings 1 and 2 are connected by a device consisting of two welded to the ends of sections 1 and 2 of the rods 6 with holes in which the tie bolts are inserted 7. The connecting device is located on the outside of the centralizer sections.

Adjustable stops 5 are welded to each half-ring section 1 and 2 (see Figs. 1 and 2). The number of stops 5 and their location is determined by the diameter and wall thickness of the pipe.

The stops 5 (see Fig. 2) contain high (L = 3d) nuts 8, two connecting plates 9 and four engagement plates with sections of the centralizer 10. The plates 9 and 10 are welded together and to the nuts 8 on both sides, the plates 10 form arched space.

Stops 5 are used to transmit pressure to the edges of the joined pipes and pipe parts

To protect the surface of the pipes from scratches and scratches, hinged heels can be attached to the ends of the adjustment bolts.

The stops 5 may have rounded ends to facilitate the movement of the centralizer through the pipe.

The stops 5 have an arched space between the pairs of plates 10, which ensures the convenience of welding and allows you to perform welding without breaks.

To eliminate the unacceptable displacement of the edges between the stationary stops 5, the centralizer is equipped with removable stops, the design of which is similar to the design of the stationary stops.

The stops 5 exert great pressure on the arcs of the centralizer, directed in the direction opposite to the axis of the pipe. To exclude deformations caused by this pressure, the centralizer sections 1 and 2 are made of a thick-walled strip, with the wide side oriented perpendicular to the pipe surface.

The device operates as follows.

One section 1 with earring 3 is put on the end of the pipe, another section 2 with hook 4 is connected to it, the earring 3 is hooked to hook 4. If the number of sections is more than two, the remaining sections are connected in the same way.

After installing the centralizer tighten the bolts 7 of the connecting device to the stop using a wrench. The key is used as a rotor for quick rotation of the bolt or as a lever by turning it 90 degrees to create a lot of effort.

In the event of unacceptable displacements of the pipe edges between the stationary stops 5, it is necessary to install removable stops.

A removable stop is placed on the surface of the pipe between the arcs of the centralizer along the arcs, then it is rotated until the plates enter the meshing 10 sections of the centralizer. Then tighten the adjusting nuts 8 to eliminate the bias. The centralizer allows you to weld the entire perimeter of the joint without gaps.

The inventive design provides improved ergonomic characteristics due to the convenience of welding in the space between two plates of adjustable emphasis.

The design of the connection of the centralizer sections is simplified and facilitated, the work with the connection is facilitated, while better assembly of pipe joints is ensured and the weight of the welding equipment is reduced, which also creates convenience for work.

The external centralizer is simple to implement, does not require complex fixtures, is industrially applicable, will be widely used in welding work on pipelines.

Claims (2)

1. The external pipe centralizer, containing arched sections and adjustable stops welded to them along the perimeter, while adjacent sections are connected to each other by means of an earring and a hook, fixed at their ends, and the ends of the first and last sections are connected by a connecting device, characterized in that the connecting device consists of two axes welded to the ends of the said sections with holes into which tightening bolts are inserted, while the stops are made in the form of two pairs of engagement plates with centralizer sections, welded two connecting plates to form a distance between each pair of plates, all six plates welded on both sides to high nuts to form arch space between the plates with engagement sections centralizer. 2. The external pipe centralizer according to claim 1, characterized in that it is equipped with removable adjustable stops.

Images