RU2697084C1 - Method of assembling split collar on continuous pipeline of transition and device for its implementation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: group of inventions relates to construction and repair of pipelines and can be used for assembling a rubber split collar on a continuous pipeline. Device comprises a device for compression when glued to each other male and female elements of collar connector. Said compression means includes a compacting plate, on the outer side of which there are seats in the form of projections and / or recesses for thrust screws mounted on a crossarm with the possibility of moving them up and down to create preset pressure by inner side of pre-pressing plate on glued connector of collar at its location between two rods. Rods are mounted along normal to surface of pipeline by means of clamps-ties with rubber gaskets. Cross beam is fixed on said bars. Connector of final sealing cup is arranged on upper part of continuous pipeline between two mounted rods, said collar is fitted by inner side of the compacting plate and thrusts interacting with the seats to force the glued surfaces of the collar detachment elements. Simultaneously pressure is controlled by means of torque measurement of thrust propellers by preset magnitude. At the moment of gluing the collar connector, pre-pressing is performed by increasing the tightening torque of the weakened thrust propellers.

EFFECT: group of inventions provides required quality of glued connector of collar, tightness of annular space and higher reliability of pipeline transition.

5 cl, 6 dwg

Description

The group of inventions relates to the construction and repair of pipelines and can be used to assemble a rubber split sleeve on a continuous transition pipeline.

Rubber cuffs are used to seal the annulus at the transitions of pipelines with a diameter of 57-1420 mm, laid under roads, engineering structures and water barriers, in a protective casing with a diameter of 159-1720 mm. Detachable rubber cuffs are used for repairs without cutting the pipeline, as well as in cases where it is impractical to install an integral rubber cuff on the pipeline.

Known split cuff made of an elastic material (see patent RU 2206003 C1 IPC F16J 15/32), which contains two cylindrical parts of different diameters and connecting their conical transitional part. The cuff is made of rubber with a longitudinal stepped connector, contains a lock connection with two rows of clips.

A disadvantage of the known detachable cuff is that the clamps do not guarantee the tightness of the connector, in addition, the clamps create rigidity, which prevents the creation of corrugations on the cuff.

Known split cuff (see patent RU 2206004 C1 IPC F16J 15/32), made with a glued step connector containing male and female elements.

The disadvantage of this device is that it is difficult to ensure that the glued surfaces of the cuff step connector are pressed against each other on a continuous transition pipe due to its radius surface.

A device for assembling a detachable rubber cuff with a stepped connector, consisting of male and female elements of the cuff connector (see patent RU 2309315 C1 IPC F16J 15/32), adopted as a prototype.

The assembly of the elements of the cuff connector is carried out on a continuous transition pipeline (hereinafter referred to as the pipeline) using compression means made of two radiused rectangular plates 600-800 mm long. To prevent deflection of the plates during compression of the cuff connector at the time of gluing, the plates are made with a thickness of 8-10 mm. One of the plates with a thickness of 8-10 mm is installed on the upper part of the pipeline inside the cuff under the bonded connector, the second plate is installed on top of the bonded connector on the cuff. On the end parts of the plates, holes for bolted connections are made, by which, when gluing the elements of the connector of the cuff, the plates are pressed together. Each element of the cuff connector is 5 mm thick.

A disadvantage of the known device is that due to the too large length of the radius plates (600-800 mm) with two bolted joints on the end parts, it is difficult to create a uniform specific pressure along the entire length of the cuff connector elements to be glued. When the end parts of two plates are compressed by bolting at the moment of gluing, the middle part of the upper plate is deformed upward and “air bubbles” are formed in the middle part between the elements of the cuff connector to be glued. In addition, the pressure created by the radius plates is not controlled, which adversely affects the quality of the cuff connector to be glued.

Another disadvantage is that the installation of a radius plate with a thickness of 8-10 mm in the inside of the cuff under the glued connector on the pipeline leads to an increase in the gap between the glued elements of the connector and a loose fit of the glued cuff to the pipeline after dismantling the radius plate. As a result, when gluing the elements of the connector of the cuff, their end side edges do not fit flush with the previously cut line in the manufacture of the elements of the connector and a gap is formed between the side end elements of the connector and the web of the cuff along its entire length. Upon completion of gluing the connector of the detachable cuff, it is necessary to carry out the corrugation by compressing its conical part, and secure the cuff with clamps on the pipeline and the protective casing-case. When corrugation is performed on the cuff, additional stresses are formed in the end glued portions of the cuff connector. As a result, the connector elements diverge face up from the cuff web due to insufficient compression of the cuff connector elements by the upper radius plate when gluing them, which reduces the cuff web thickness by 5 mm and further increases the gap width by 7-8 mm between the cuff web and the end part connector elements. The total width of the gap between the elements of the cuff connector is 15-18 mm, which adversely affects the strength of the glued cuff connector. Ground water - an “aggressive medium” —which breaks the glued cuff connector in the gap, and water enters the annular space of the pipeline transition, which results in accidents and huge costs for the gap formed along the entire length of the cuff, is 5 mm deep and 15–18 mm wide. their elimination.

The claimed group of inventions is aimed at ensuring the required quality of the glued cuff connector, the tightness of the annulus and improving the reliability of the transition of the pipeline.

To solve this problem, a device and method have been developed that eliminate the aforementioned drawbacks during assembly and final gluing of the elements of the split sleeve on the pipeline.

A device for assembling a detachable rubber cuff on a continuous transition pipe with a diameter of 57-1420 mm, laid in a protective casing-case with a diameter of 159-1720 mm under roads, engineering structures and water barriers, contains means for compressing when glued together the male and female connector elements cuffs. The developed device differs from the known devices in that the said means for compression includes a pressing plate, on the outside of which there are seats in the form of protrusions and / or recesses for thrust screws mounted on the traverse with the ability to move them up and down to create a predetermined internal pressure the side of the prepress plate on the cuff connector to be glued when it is placed between two rods that are mounted normal to the surface of the pipeline using clamps with ties ynoic spacers mounted on the continuous conduit bolting, wherein a traverse is fastened to said rods. The protrusions and / or recesses may have a cylindrical and / or conical and / or spherical surface. The inner side of the pre-pressing plate can be made with a radial recess equal to the outer surface of the cuff connector, installed for final bonding on a continuous pipe. The prepress plate can be made in widths from 80 to 120 mm.

The developed method for assembling a detachable rubber cuff on a continuous transition pipe with a diameter of 57-1420 mm, laid in a protective casing-case with a diameter of 159-1720 mm under roads, engineering structures and water barriers, differs from the known methods in that the cuff connector for final bonding is placed on the upper part of the continuous pipeline between two rods mounted normal to the surface of the pipeline using clamps-couplers, on the rods, fix the traverse with stop screws, on the cuff connector install the pressing plate with the inner side and thrust screws interacting with seats made in the form of protrusions and / or recesses on the outer side of the pressing plate, create pressure on the glued surfaces of the cuff connector elements with each other and simultaneously control the pressure by measuring the torque of the thrust screws on a predetermined value, at the time of gluing the cuff connector, prepress is performed by increasing the tightening torque of the loosened stop screws.

The essence of the alleged invention is illustrated by drawings, where:

in FIG. 1 - shows a General view of a device for assembling a detachable rubber sleeve on a continuous transition pipe;

in FIG. 2 - shows the prepress plate, where the inner side is made with a radial recess R 174-722 mm, in the center on its outer surface there are seats for thrust screws mounted on the traverse;

in FIG. 3 - shows a device for assembling a detachable rubber cuff on a continuous transition pipe;

in FIG. 4 shows an enlarged fragment AA of FIG. one;

in FIG. 5 - shows the elements of the cuff connector.

in FIG. 6 - shows a detachable cuff.

The depicted elements in the drawings are indicated by the following positions:

1 - prepress plate;

2 - seats made on the prepress plate;

3 - persistent screws;

4 - traverse;

5 - cuff connector;

6 - split cuff;

7 - continuous pipeline transition;

8 - rods for securing the beam;

9 - a collar coupler;

10 - bolted connection;

11 - rubber gaskets to protect the anticorrosive coating of the pipeline;

12- female connector element;

13 - male element of the connector;

14 - end plane of the elements of the cuff connector;

15 - a protective casing of a continuous transition pipe.

The proposed device for assembling a detachable cuff contains a means for compression when gluing with each other covered 13 and covering 12 elements of the connector 5 of the cuff 6. The specified means for compression includes a prepress plate 1, the inner side of which is made with a radial recess R = 174-722 mm for pipelines diameter from 325 to 1420 mm. The radius of the recess R depends on the diameter of the pipe and the thickness of the superimposed elements of the connector 5 of the cuff 6. The inner side of the prepress plate 1 can be made with a radius recess equal to the outer surface of the connector 5 of the cuff installed for final bonding on the continuous pipe 7.

In the center on the flat surface of the pressing plate 1 there are seats 2 for the thrust screws 3. The seats 2 in the form of protrusions and / or recesses have a cylindrical and / or conical and / or spherical surface. When tightening the thrust screws 3, the seats 2 prevent the lateral shift of the pressing plate 1, which contributes to the high-quality bonding of the connector 5 of the sleeve 6, the tightness of the annular space and increase the reliability of the transition of the pipeline.

The stop screws 3 are mounted on the traverse 4 with the possibility of moving them up and down to create a predetermined and controlled pressure on the prepress plate 1 and on the connector 5 of the cuff 6 when gluing it. Pressure control contributes to the high-quality bonding of the connector 5 of the cuff 6, the tightness of the annular space and increase the reliability of the transition of the pipeline.

The traverse 4 of the device is made, for example, of a profile pipe and carries the main load when creating pressure on the bonded connector 5 of the cuff 6.

On the end parts of the traverse 4, holes are made for securing it on the upper part of the pipeline 7 in a horizontal position on the rods 8 with clamps 9. The horizontal placement of the traverse 4 on the upper part of the horizontal pipe 7 is most convenient for gluing the connector 5 of the sleeve 6, however, for inclined pipelines are optional. The installation of the rods 8 along the normal to the surface of the pipeline provides the most uniform pressure distribution when tightening the thrust screws 3, prevents the skew and lateral shift of the crosshead 4 and the prepress plate 1.

Clamps-couplers 9 are made of two half-clamps and are fixed on the transition pipeline using bolted connections 10 on rubber gaskets 11 to protect the anticorrosion coating on the continuous pipeline 7. Protection of the anticorrosion coating on the continuous pipeline 7 from damage increases the reliability of the pipeline transition.

A method of assembling a detachable rubber sleeve on a continuous pipe is as follows:

A detachable sleeve 6 is placed around the pipe 7, the male 13 and female elements 12 of the connector 5 coated with glue are laid on each other. The sleeve 6 with pre-glued elements 12,13 of the connector 5 is installed on the top of the pipeline 7 with the connector 5 upward for final gluing by compressing the elements connector 12, 13 with each other without tension in a calm state.

Then, rubber gaskets 11, tie clamps 9 with rods 8 are installed on the continuous pipe 7 so that the cuff 6 is between them. The rods 8 are placed on the upper part of the clamps-couplers 9 parallel to each other and normal to the surface of the pipeline 7. Clamps-couplers 9 are fixed to the pipeline 7 transition using bolted connections 10.

On the rod 8 set the beam 4 with the thrust screws 3 and rigidly fix it to the rod 8.

A press-on plate 1 is installed on the glued connector 5 between the two rods 8 on the inside. The inner side of the press-on plate 1 can be made flat for the width of the bonded connector 5 less than 80 mm and the diameter of the pipe 7 more than 325 mm. For the best adhesion of the connector 5, the inner side of the prepress plate 1 can also be made with a radius recess R 174-722 mm for pipelines with diameters from 325 to 1420 mm depending on the diameter of the pipeline.

After installing the prepress plate 1 on the connector 5 of the cuff 6, the thrust screws 3 located on the crosshead 4 are moved down onto the prepress plate 1 in the seats 2 and create pressure from the middle to the edges evenly over the entire length of the surface of the elements of the connector 5 of the cuff 6 without offset and tension in the bonding areas of the male 12 and female 13 of the connector 5 with each other.

When creating pressure on the prepress plate 1, the pressure is simultaneously controlled by measuring the tightening torque of the thrust screws 3 by a predetermined amount.

At the time of bonding of the connector 5 of the cuff 6, prepress is performed by increasing the tightening torque of the loosened stop screws 3.

When creating a steady constant pressure on the prepress plate 1 and on the connector 5 of the cuff 6, the gluing process is maintained for 24-27 hours.

After a predetermined time, the device for assembling the cuff 6 is removed, and in the absence of visible gaps on the cuff 6 between the lateral end surfaces 14 of the male 12 and the female connector 13, seal the annulus of the transition. To do this, mount the cuff 6 on the protective casing 15, create a corrugation by moving the cylindrical part of the cuff through the pipe 7 into the inside of the protective casing, fix it with clamps on the pipe 7 and the protective casing-case 15, and put the unit into operation.

The proposed device and method for assembling a detachable cuff were applied on 08/10/2017 at the transition of a pipeline with a diameter of 1020/1220 mm during construction under the Moscow-St. Petersburg highway, where positive results were obtained.

Claims (5)

1. A method of assembling a detachable rubber cuff on a continuous transition pipe with a diameter of 57-1420 mm, laid in a protective casing-case with a diameter of 159-1720 mm under roads, engineering structures and water barriers, characterized in that the cuff connector for final bonding is placed on the upper part continuous pipeline between two rods mounted normal to the surface of the pipeline using clamps-couplers, a traverse with stop screws is fixed on the rods, the inner sides are installed on the cuff connector th prepress plate and thrust screws interacting with seats made in the form of protrusions and / or recesses on the outside of the prepress plate, create pressure on the glued surfaces of the cuff connector elements with each other and simultaneously control the pressure by measuring the torque of the thrust screws by a predetermined amount , at the time of gluing the cuff connector, prepress is performed by increasing the tightening torque of the loosened stop screws. 2. A device for assembling a detachable rubber cuff on a continuous transition pipe with a diameter of 57-1420 mm, laid in a protective casing-case with a diameter of 159-1720 mm under roads, engineering structures and water barriers, containing a means for compressing when gluing each other covered and covering cuff connector elements, characterized in that the compression means includes a pre-press plate, on the outside of which there are seats in the form of protrusions and / or recesses for the stop screws, mounted x on the traverse with the ability to move them up and down to create a predetermined pressure with the inside of the prepress plate on the glued cuff connector when it is placed between two rods, which are mounted normal to the surface of the pipeline using clamp ties with rubber gaskets fixed to the continuous pipe with bolts connections, and the traverse is fixed on the indicated rods. 3. The device according to p. 2, characterized in that the protrusions and / or recesses have a cylindrical and / or conical and / or spherical surface. 4. The device according to p. 2 or 3, characterized in that the inner side of the prepress plate is made with a radius recess equal to the outer surface of the cuff connector installed for final bonding on a continuous pipe. 5. The device according to any one of paragraphs. 2-4, characterized in that the prepress plate is made from a width of 80 to 120 mm.

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