RU199236U1 - Tool for stripping external insulation at pipe ends - Google Patents

Abstract

The utility model relates to the pipeline transportation of oil products, liquid and gaseous media, namely, to cleaning the outer surface of the end sections of steel pipes from insulation for subsequent construction and installation works and butt welding. The device for removing external insulation at the ends of pipes contains the main working tool, which is made in the form of a nozzle device, which contains a central axis equipped with three centering stops located at an angle of 120 ° relative to each other, and one upper centering stop is formed by high and low strips , assembled by the method of permanent connection, and a roller with a handle installed between them, the two lower centering stops consist of a spacer and a gripping element, while the central axis of the nozzle device is connected to a cage containing bearings, and is additionally equipped with a L-shaped movable part with the possibility rotation around the central axis, while the movable part is made of strips and plates connected in series with each other, at the end of which a knife in the form of a prism is installed, equipped with a stop. The use of the proposed device increases the quality and level of automation in the manufacture of pipes with external insulation by increasing the efficiency of the process of removing the outer coating at the ends of the pipes, eliminates the use of improvised tools and complex devices during the process. 2 ill.

Description

The utility model relates to pipeline transportation of oil products, liquid and gaseous media, namely, to cleaning the outer surface of the end sections of steel pipes from insulation for the subsequent construction and installation work and butt welding.

Known device for mechanical cleaning and surface treatment "ROI" (patent RU No. 2236313, IPC 7 B08B 9/023, publ. 09/20/2004 in bulletin No. 26), in which a disk cutter is used as working bodies for surface cleaning or an abrasive tool. The device contains a rotor capable of rotating around its axis and simultaneously moving along the surface to be treated, which includes a supporting structure and levers pivotally suspended from it with a working body and an additional weight attached to each of them.

The disadvantages of the known device are a complex design, power consumption and wear of working bodies that require regular replacement and, as a result, high material costs for manufacturing, use and maintenance, as well as a narrow scope, lack of mobility, the inability to use in field conditions and at low scope of work.

Also known is the working body of the machine for removing insulation from the outer surface of the pipeline (patent RU No. 2395353, IPC B08B 9/023, publ. 27.07.2010). The working body of the machine contains a rotor with cleaning tools fixed on levers, which are mounted on axles with the possibility of rotation around their axis, and pressure devices for pressing the cleaning tools to the pipeline surface.

The disadvantages of the known working body of the machine for removing insulation from the outer surface of the pipeline are a complex design and a complex kinematic scheme of work, in addition, it consumes electricity, cleaning tools wear out, requiring regular replacement, and therefore high material costs for manufacturing, use and maintenance. The installation is stationary, not mobile, that is, it has a narrow scope, it cannot be used in the field and with small amounts of work.

The closest is a device for cleaning the outer surface of the end sections of pipes from insulation (patent RU No. 2522346, IPC B08B 9/023, publ. 10.07.2014, bul. No. 19), containing a cleaning tool - the main working tool, made with the ability rotation and connected to the lever, while the main working tool is made in the form of a regular straight prism or a cylinder with a side hole having dimensions sufficient to secure the outer insulation during rotation, the lever is connected to the end of the main working tool, and the lever is equipped with at least one handle, located at a distance from the axis of rotation sufficient to overcome the adhesion force of the insulation to the pipe.

The disadvantage is the instability of the device due to the fact that the structure of an average complexity has such elements as a cylinder with a groove and holes, a handle, a curved lever that transmits rotation energy. For the manufacture of the device, a calculation is required depending on the parameters of the steel pipe and the characteristics of the outer coating. There are no elements for fixing the device on the outer surface of the pipe; the device is held by hand near the pipe by engaging the tip of the outer insulation with a groove and winding the outer coating onto the body of the device. At the same time, in the operation of removing the external insulation of the pipe, improvised tools are used (cutter, hacksaw, etc.).

The technical tasks are to improve the quality and level of automation of the manufacture of pipes with external insulation by increasing the efficiency of the process of removing the outer coating at the ends of the pipes, eliminating the use of improvised tools and complex devices during the process, as well as creating a simple and reliable structure in production for removing external insulation on pipe ends.

Technical problems are solved by a device for removing external insulation at the ends of pipes, containing the main working tool.

What is new is that the main working tool is made in the form of a nozzle device, which contains a central axis equipped with three centering stops located at an angle of 120 ° relative to each other, and one upper centering stop is formed by high and low strips assembled by the method of permanent connection, and a roller with a handle installed between them, the two lower centering stops consist of a spacer and a gripping element, while the central axis of the nozzle device is connected to a cage containing bearings, and is additionally equipped with an L-shaped movable part with the ability to rotate around the central axis, when The movable part is made of strips and plates connected in series with each other, at the end of which there is a knife in the form of a prism, equipped with a stop.

FIG. 1 shows a device for removing external insulation at the ends of pipes, FIG. 2 shows a view A (side) of the device.

The pipe ends stripper contains the main working tool. The main working tool is made in the form of a nozzle device, which contains a central axis 1 for imparting rotation to the device (see Fig. 1), equipped with three centering stops located at an angle of 120 ° relative to each other. Moreover, one upper centering stop is formed by high 2 (Fig. 2) and low 3 strips, assembled by the method of permanent connection (for example, by welding), and installed between them roller 4 with handle 5 (Fig. 1), which acts as a stopper, the resulting element is fixed bolted connection 6. The two lower centering stops consist of a spacer 7 (Fig. 2) and a gripping element 8. In this case, the central axis 1 (Fig. 1) of the nozzle device is connected to the cage 9 containing bearings 10 and is additionally equipped with a movable part Г- shaped with the possibility of rotation about the central axis 1. In this case, the movable part of the L-shaped is made of sequentially connected strips 11 and plates 12 (Fig. 2) and 13, connected by a bolt connection 14 (Fig. 1), at the end of which a knife 15 in the form of a prism is installed, also fixed by a bolt connection 16, equipped with a stop 17. The stop 17 allows you to additionally fix the knife 15. To the plates 12 (Fig. 2) and 13 of the movable part of the L-shaped the handle 18 is welded to the mold (Fig. 1) for ease of use of the device when removing external insulation at the ends of the pipe 19.

The device for removing external insulation at the ends of the pipes works as follows.

To remove the outer insulation at the ends of the pipe 19, a device is installed to the end of the pipe 19. The centering stops are located (fixed), namely, the gripping elements 8 (Fig. 2) grab the end of the pipe 19 (Fig. 1). The handle 5 of the upper centering stop is lowered down so that the device is additionally fixed with the roller 4 (Fig. 2). Then the knife 15 (Fig. 1) is brought to the outer insulation of the pipe 19. The cutting part of the knife 15 is turned towards the pipe 19 using the handle 18. By rotating the movable part of the L-shaped shape around the central axis 1, i.e. pipes 19, form an incision along the entire diameter of the pipe 19 on the product with external insulation. Then, without removing the knife 15 from the outer insulation of the pipe 19, holding and pressing the handle 18, make a longitudinal cut. Further, by removing the device from the end of the pipe 19, the outer insulation of the pipe 19 is manually removed.

The proposed device allows you to reduce labor costs, the cost of purchasing expensive equipment, and save production space. The operation of removing the outer coating can be carried out during the application of outer insulation without stopping the equipment.

This operation is performed for the subsequent joining of pipes into a string. Remove outer insulation at the pipe ends. A centralizer is placed between the pipes, the pipes are inserted into the centralizer, the joint is welded. This type of pipes with external insulation is used in the construction of oil and gas pipelines.

The use of the proposed device increases the quality and level of automation in the manufacture of pipes with external insulation by increasing the efficiency of the process of removing the outer coating at the ends of the pipes, eliminates the use of improvised tools and complex devices during the process. The proposed device is simple and reliable in the manufacture of a structure for removing external insulation at the ends of pipes.

Claims (1)

A device for removing external insulation at the ends of pipes, containing the main working tool, characterized in that the main working tool is made in the form of a nozzle device, which contains a central axis equipped with three centering stops located at an angle of 120 ° relative to each other, with one upper the centering stop is formed by high and low strips, assembled by the method of one-piece connection, and a roller with a handle installed between them, two lower centering stops consist of a spacer and a gripping element, while the central axis of the nozzle device is connected to a cage containing bearings, and is additionally equipped the movable part is L-shaped with the ability to rotate around the central axis, while the movable part is made of strips and plates connected in series with each other, at the end of which there is a knife in the form of a prism, equipped with a stop.

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