RU2647173C2 - Platform for intratubal flaw detector on magnetic wheels - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: invention relates to pipeline transport and can be used for intratubal diagnostics in construction and overhaul maintenance of objects having a pipe manifold. An object of the present invention is to provide a small platform for intratubal flaw detector on magnetic wheels, allowing unlimited maneuvering in a complex piping with Dn≥200 mm and to overcome vertical obstacles of piping without the equipping of the platform with the mechanism of turning off the magnetic field of the wheels. Platform for an intratubal flaw detector on magnetic wheels comprises magnetic motor-wheel modules and additionally equipped with magnetic wheels with non-magnetic inserts placed along the wheels, which provide variable magnetization force of the platform wheels for the intratubal defectoscope to the surveyed pipeline surface, which allows it to overcome vertical obstacles in the form of internal angles.

EFFECT: proposed platform is optimal for the construction on its basis of small-sized intratubal detectors, and also other technological devices used in various branches of the national economy.

1 cl, 4 dwg

Description

The invention relates to pipeline transport and can be used for in-line diagnostics in the construction and overhaul of facilities with piping.

Currently, for in-line diagnostics, both traditional in-tube flaw detectors and autonomous robotic flaw scanner-scanners [1] are used (materials of IntroScan Technology CJSC: “Development of tools for monitoring the technical condition of technological pipelines of Gazprom compressor stations using an autonomous robotic scanner of flaw detector A2072 "IntroScan" "presented at the 33rd thematic seminar" Diagnostics of equipment and pipelines of compressor stations "in Svetlogor to, 8-12 September 2014).

In-pipe shells move in the pipe under the influence of a gas flow, while the pipe should not change the bore. Such devices can only be used on existing gas pipelines.

The closest in technical essence and the achieved result to the claimed invention are platforms of the A2072 IntroScan autonomous robotic flaw scanner-detector [2] (materials of IntroScan Technology CJSC: “Development of tools for monitoring the technical condition of technological pipelines of Gazprom compressor stations using autonomous robotic A2072 IntroScan flaw detector scanner ”presented at the 33rd thematic workshop“ Diagnostics of equipment and pipelines of compressor stations ”in Sve Tlogorsk, September 8-12, 2014, prototype v3.1). The scanner-flaw detector platform ensures its movement along an arbitrary trajectory, excluding the most contaminated sections of the internal cavity of the pipeline and, as a result, there is no need for cleaning measures before conducting in-line diagnostics. Magnetic motor-wheel modules of the platforms ensure the passage of flaw detector scanners through the internal cavity of the pipe and through the elements of various assortments (pipes, bends, tees, transitions, ballast protection devices) DN 300-1400 mm.

The disadvantages of this platform are:

- the automobile rotation pattern of known platforms excludes the declared possibility of maneuvering in tees with a DN of 300 mm due to the presence of a significant turning radius and dimensions of the platforms themselves;

- the inability to overcome vertical obstacles due to the configuration of the platform.

The aim of the present invention is to provide a small platform for an in-line flaw detector on magnetic wheels, allowing:

- carry out unlimited maneuvering in a complex piping with DN ≥200 mm;

- overcome vertical obstacles in the piping without equipping the platform with a mechanism for disconnecting the magnetic field of the wheels.

The essence of the present invention lies in the fact that the claimed platform for an in-line flaw detector on magnetic wheels, containing magnetic motor-wheel modules, according to the invention is equipped with magnetic wheels with non-magnetic inserts located around the perimeter of the wheels, which provide a variable force of magnetization of the wheels of the platform for an in-line flaw detector to the examined the surface of the piping, which allows it to overcome vertical obstacles in the form of internal angles.

In FIG. 1 shows a platform for an in-line flaw detector on magnetic wheels, where:

1 - chassis;

2 - longitudinal axis;

3 - emphasis;

4 - gear motor;

5 - wheel;

6 - ring magnet;

7 - non-magnetic inserts;

8 - vertical obstacle.

The platform for an in-line flaw detector on magnetic wheels structurally consists of 2 chassis 1, interconnected by an articulated longitudinal axis 2 with a stop 3, restricting the rotation of the chassis 1 relative to each other within a given sector C. Gearmotors 4 are mounted on chassis 1, on the axes of which are mounted wheels 5 and ring magnets 6. The wheels 5 of the platform for an in-line flaw detector are equipped with non-magnetic inserts 7, evenly spaced around the perimeter.

The inventive platform for an in-line flaw detector on magnetic wheels works as follows.

The platform is installed on the inner surface of the steel pipe subject to diagnostic examination. Ring magnets 6 through the wheels 5, made of electrical steel with high magnetic properties, provide magnetization of the platform to the examined steel pipe. The presence of a hinged longitudinal axis 2 with a stop 3, restricting the rotation of the chassis 1 relative to each other within a given sector C, ensures full fit of all wheels 5 of the platform to a curved surface. Then, the gear motors 4 are supplied with power. When the wheels 5 of the platform rotate in one direction (counterclockwise, see Fig. 1), the platform moves forward. When changing rotation to the opposite - back. The rotation of the left and right wheels 5 in opposite directions ensures the rotation of the platform in place. When the platform rests on a vertical obstacle 8, the wheels 5 slip, until the non-magnetic inserts 7 of the front wheels 5 occupy the position corresponding to that depicted in FIG. 2. In this position, due to the presence of a non-magnetic insert 7, the magnetization force of the front wheels 5 to the vertical surface of the obstacle 8 F _{1 is} greater than the force of their magnetization to the horizontal surface F ₂ . Tractive force F _{t of the} front wheels up the vertical obstacle 8 is determined by the formula:

F _t = k _sc * F ₁ ,

where k _sc - the coefficient of adhesion of the wheel with the supporting surface;

F ₁ - the magnetization force.

Under the condition F _t > F _{2, the} front wheels 5 of the platform begin to move upward along the vertical obstacle 8. The rear wheels 5, also equipped with non-magnetic inserts 7, slip after stop in the vertical obstacle 8 until the non-magnetic inserts 7 of the rear wheels 5 occupy the position corresponding to that shown in Fig. 3. Thus, the platform overcomes the vertical obstacle 8. The descent from the vertical obstacle 8 is carried out similarly, while the front and then the rear wheels 5 are in a horizontal section. ok non-magnetic inserts, due to the slippage of the wheels 5, must correspond to FIG. four

It should be noted that the ring magnets 6 should be selected so that their efforts are sufficient to hold the platform in any of its positions on the object being examined despite the presence of non-magnetic inserts 7 on the front wheels 5.

The absence of an additional mechanism for switching off the magnetic field in the platform design leaves additional space for placement of technological equipment on the platform, and kinematics provides unlimited maneuvering in a complex piping.

The proposed platform is optimal for building on its basis small-sized in-line flaw detectors, as well as other technological devices used in various sectors of the economy.

INFORMATION SOURCES

1. Materials of IntroScan Technology CJSC: “Development of tools for monitoring the technical condition of the technological pipelines of compressor stations of OAO Gazprom, using the A2072“ IntroScan ”autonomous robotic scanner-flaw detector, presented at the 33rd thematic workshop“ Diagnostics of compressor station equipment and pipelines ” , in the city of Svetlogorsk, September 8-12, 2014

2. Materials of IntroScan Technology CJSC: “Development of tools for monitoring the technical condition of the technological pipelines of compressor stations of OAO Gazprom, using the A2072“ IntroScan ”autonomous robotic scanner-flaw detector, presented at the 33rd thematic workshop“ Diagnostics of compressor station equipment and pipelines ” , in the city of Svetlogorsk, September 8-12, 2014, prototype v3.1.

Claims (1)

A platform for an in-line flaw detector on magnetic wheels, containing magnetic motor-wheel modules, characterized in that it is equipped with magnetic wheels with non-magnetic inserts placed around the perimeter of the wheels, which provide a variable magnetizing force of the wheels of the in-line flaw detector platform to the examined surface of the piping, which allows it Overcome vertical obstacles in the form of internal angles.

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