The way the internal strengthening of the weakened zone of the pipeline and device for its implementation

 

The invention relates to the construction and used for the construction and operation of pipelines for corrosion protection zones internal surfaces and welded joints of pipes. Inside of the pipeline in the reinforced zone enter the device - rethimnou sleeve, made in the form of a set of spring-loaded arcuate strips, coated with a polymer binder, and a fixed retaining element. The latch removing the sleeve expands and presses a bandage to the inner surface of the reinforced zone of the pipeline with an estimated effort. Expands the Arsenal of technical means. 2 S. and 2 C.p. f-crystals, 4 Il.

The invention relates to the field of construction and repair of pipelines and can be used to strengthen weakened by corrosion protection and integrity of the internal zones of the individual pipes, pipe sections and pipelines, as well as to increase the strength of these zones.

The known method and device for internal strengthening weakened corrosion protection of weld zone of the pipe (Patent RF №2128800, CL F 16 L 58/02, the application 97112410.06 from 25.07.97, published 10.04.99, authors: Moiseenko C. A., Swedes centuries, the Swedes Century. N. Patentee: Scientific production about Locke transport module, enter it in the zone of the welded joint, inflate the elastic membrane and press the material to the internal surface of the pipeline to the hardening of the material.

A disadvantage of the known method and device is that its implementation requires the presence of the transport module in the reinforced zone in the process of hardening of the material, which increases the duration of the works.

It is desirable to have a method and apparatus that does not require the presence of the transport module in the reinforced zone in the process of hardening of the material.

A prototype of the proposed solutions by the method and the device accepted way of internal strengthening weakened corrosion protection zone of welded pipe connections and device for its implementation (RF Patent No. 2133908, CL F 16 L 58/02, the application 97117309/06 from 16.10.97, published 27.07.99, Authors: Moiseenko C. A., Swedes centuries, the Swedes Century. N. Patentee: Scientific-production Association “Tris”). The method is as follows. Inside the pipe in the zone of the welded joint is injected Rethimno device placed inside a flexible sheath, which sequentially placed spirally coiled metal strip with locking compound and impregnated polymeric binder is spirally rolled strip and spirally rolled bandage and presses them to the inner surface of the pipe. After reaching the estimated degree of compression bandage fixation of compression in an interlock tape, resulting in the presence of the transport module in the reinforced zone in the process of hardening of the material is not required.

The need for an elastic shell and feed it under pressure working environment complicates the method and the device. The proposed design of clamps coiled tape complicate the technology of fixing the achieved compression. Emphasize all areas equally, but in practice it is often weakened substantially only the portion of the zone, such as the top or bottom of the pipe. In this case, following this method will lead to inefficient use of materials of the elements of the device.

It is desirable to have a method and apparatus for the internal strengthening of the weakened zone of the pipeline to prevent the elastic membrane and the necessity of submission to the working environment, to simplify the technology of fixing the achieved compression and, if necessary, in order to increase the area unevenly, i.e. somewhere in the zone more and in some less.

The problem is solved in that way the internal gain oslablennoy is also spirally rolled bandage, impregnated with a polymeric binder, with the possibility of the pressing sleeve to the inner surface of the pipeline with an estimated effort and fixation of the achieved compression, what is new is that in the device Razina sleeve, made in the form of a set of spring-loaded arcuate strips coated with a polymeric binder, grouped as necessary to ensure the most efficient allocation of the gain of the inner zone, equipped with a locking element, blocking her from samorazvitiyu with the ability to unlock and subsequent snap-in system Rethimno sleeve made of compression, the device is introduced into the amplified area of the pipeline, produce unlocking Rethimno sleeve by breaking the locking element of one of the known methods, consequently Razina sleeve samorazvitiya, pushes open the locking element and spirally rolled bandage to the inner surface of the pipeline with an estimated effort, while providing and samopoczucia the achieved compression.

The problem is solved in that the device for internal strengthening of the weakened zone of the pipeline containing rethimnou sleeve, and spirally rolled bandage, impregnated peacetime effort and commit the achieved compression, what's new is that in the device Razina sleeve, made in the form of a set of spring-loaded arcuate strips coated with a polymeric binder, grouped as necessary to ensure the most efficient allocation of the gain of the inner zone, equipped with a locking element, blocking her from samorazvitiyu with the ability to unlock and subsequent snap-in system Rethimno sleeve of the achieved compression. Spring arcuate strip can be made of corrosion-resistant performance. The locking element may be in the form of restrictive belt with lock.

The invention is illustrated in the drawings, where Fig.1 shows the device in a state where Razina sleeve, which is composed so largely to strengthen the lower part of the pipeline is in the collapsed position, lockable with a locking element of Fig.2 shows the device in a state where the locking element is open and rasina sleeve, designed to largely enhance the lower part of the pipeline, presses the locking element and band to the inner surface of the pipeline of Fig.3 shows the locking element in the closed up; Yolando in the form of a set of spring-loaded arcuate strips, covered with a polymeric binder, equipped with a locking element 2, blocking her from samorazvitiyu with the ability to unlock and impregnated with a polymeric binder band 3. Close the locking element 2 includes a restrictive belt 5 with a lock in the form of staples 6.

The method is as follows. The device is placed inside a pipeline in the reinforced zone. At the same time provide a clearance between the outer surface of the band 3 and the inner surface of the pipeline 4. Unlocks rethimnou sleeve 1, disclosing the locking element 2 by extracting the bracket 6 of the restraining belt 5 one of the known methods, under the forces of elasticity Razina sleeve samorazvitiya, presses restrictive strap 5 open the locking element 2 and spirally rolled bandage 3 to the inner surface of the pipe 4 with the estimated effort, while providing and samopoczucia the achieved compression. The estimated amount of force pressing Rethimno sleeve 1 restrictive belt 5 and band 3 to the inner surface of the pipeline 4 increases strength, as well as the necessary degree of sealing of the reinforced zone of the pipeline from the pumped about it is isit on the diameter of the pipeline, the width of the band, its physico-mechanical properties and other characteristics, which are calculated and selected the required options Rethimno sleeve 1. Polymer binder, partially extruded from band 3, forms a protective cushions around the perimeter of the bandage, which enhances the integrity and reliability of corrosion protection weakened zone of the pipeline, having pressed restrictive belt 5, performing the role of a reinforcing element further enhances the strength of the weakened zone.

An example of a specific implementation of the device. Razina sleeve consists of strips of length 1000 mm, made of cold spring complex steel strip according to GOST 2283-79. The thickness of the strips 0.35 mm, width 250 mm Strip coated with a polymer binder with a thickness of 0.4 mm on the basis of epoxy enamel. The bandage is made of voluminous non-woven polyester material, impregnated with a polymeric binder based on epoxy enamel. The locking element is a restrictive belt with lock. The device produces internal amplification irregularly weakened the weld zone of the pipe, made of welded steel pipes GOST 20295-85. The outside is it strengthen the weakened zone of the pipeline, which consists in placing in the unit area containing rethimnou sleeve, and spirally rolled bandage, impregnated with a polymeric binder, with the possibility of its pressing Rethimno sleeve to the inner surface of the pipeline with an estimated effort and fixation of the achieved compression, characterized in that the device Razina sleeve is made in the form of a set of spring-loaded arcuate strips coated with a polymeric binder, grouped as necessary to ensure the most efficient allocation of the gain of the inner zone, equipped with a locking element, blocking her from samorazvitiyu with the ability to unlock and subsequent snap-in system Rethimno sleeve made of compression, the device is introduced into the amplified area of the pipeline, make unlocking Rethimno sleeve by breaking the locking element of one of the known methods, resulting in rasina sleeve samorazvitiya, pushes open the locking element and spirally rolled bandage to the inner surface of the pipeline with an estimated effort, while providing and samopoczucia the achieved compression.

2. A device to strengthen the weakened zone of the pipeline, solariega pressing the tape to the inner surface of the pipeline with an estimated effort and fixation of the achieved compression, characterized in that the device Razina sleeve is made in the form of a set of spring-loaded arcuate strips coated with a polymeric binder, grouped as necessary to ensure the most efficient allocation of the gain of the inner zone, equipped with a locking element, blocking her from samorazvitiyu with the ability to unlock and subsequent snap-in system Rethimno sleeve made of compression.

3. The device according to p. 2, characterized in that Razina the sleeve is made of corrosion-resistant performance.

4. The device according to p. 2, characterized in that the locking element can be made in the form of restrictive belt with lock.

 

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