RU224339U1 - Device for determining the upper generatrix of a pipeline - Google Patents

Abstract

The proposed model relates to the construction of main gas pipelines and can be used on pipes with a diameter of 0.2 m to 1.7 m to determine the cold bending angles of pipes. The technical result of using the utility model is to simplify the determination of the upper generatrix of the pipeline. The technical result is achieved by the fact that the device for determining the upper generatrix of the pipeline contains a pole with a reflector installed with the possibility of translational movement, while one end with a sharp tip is located in the middle between the supporting elements, and on the second, coming out from above, a reflector is installed and secured with a round bubble level located at right angles to the pole, a flat pentagonal vertically located base, the lower edge of which has the shape of a concave semicircle, and four technological holes, a tube fixed vertically in the center on the surface of the base in which the geodetic pole is fixed, two metal cables, the upper ends of which are fixed on the surface of the tube from opposite sides and perpendicular to the plane of the base, two magnets attached to the lower ends of the metal cables, while The supporting elements are legs with telescopic connections, the upper ends of which are secured with screw connections on the surface of the base and extend in its plane and at right angles to each other.

Description

The proposed model relates to the construction of main gas pipelines and can be used on pipes with a diameter of 0.2 m to 1.7 m to determine the cold bending angles of pipes.

When carrying out geodetic work on main gas pipelines, there is a need to measure the angle of rotation of the pipe in order to make a duplicate of defective pipes during major repairs, and for this it is necessary to accurately measure the upper generatrix of the pipeline. Otherwise, if the measurements of the upper generatrix of the pipeline are made with an error, the bend angle of the pipe will be determined incorrectly and will lead to problems with joining the pipes.

A device is known for determining the position of the axis of a buried pipeline (Patent No. 2253839, published on November 6, 2005), containing three identical rods installed in the holes of the rod. Each has a vernier scale along its entire length and support rollers at the lower end. The central rod acts as a leveling rod. The outer rods are equidistant from the central one. The distance between the outer rods is no more than the diameter of the pipeline. The rods move freely in the axial direction in the holes of the rod. The rod is rotated relative to the central rod. The outer rods are lowered or raised. The largest difference in values between the central and outer rods corresponds to the position of the central rod exactly above the axis of the pipeline.

The disadvantage of this device is the difficulty of its use: due to the lack of a reflector, which does not make it possible to immediately carry out tacheometric measurements; Due to the long support rails, which are fixed in one place, installation on pipes with a diameter of less than 1 m requires additional work.

A device for determining the upper generatrix of a pipeline is known (Patent No. 221001 published on October 13, 2023), which we took as a prototype. The device consists of two inclined slats, length from 1.25 m to 1.5 m. The slats run crosswise relative to each other at an angle from 10 degrees to 120 degrees and are connected to each other by two horizontal slats, secured with screws. Any geodetic pole, for example, Leica GLS115, passes through the central holes of the horizontal slats perpendicular to them. Any prism reflector with a round bubble level with an accuracy of at least 0.5 mm, for example, Vega MP03P, is mounted on the pole with a clamping fastening and the ability to move along it.

The disadvantage of this device is the difficulty of its use: due to its large dimensions, difficulties arise during transportation; due to the lack of fastening of the device above the measurement point, the work of at least two specialists is required, since the device must be held in a stationary position; Due to the length of the supporting elements, installation on pipes with a diameter of less than 1 m requires additional work.

The technical problem solved by the proposed utility model is the creation of a device for determining the upper generatrix of the pipeline.

The technical result of using the utility model is to simplify the determination of the upper generatrix of the pipeline.

The technical result is achieved by the fact that the device for determining the upper generatrix of the pipeline contains a pole with a reflector installed with the possibility of translational movement, while one end with a sharp tip is located in the middle between the supporting elements, and on the second, coming out from above, a reflector is installed and secured with a round bubble level located at right angles to the pole, a flat pentagonal vertically located base, the lower edge of which has the shape of a concave semicircle, and four technological holes, a tube fixed vertically in the center on the surface of the base in which the geodetic pole is fixed, two metal cables, the upper ends of which are fixed on the surface of the tube from opposite sides and perpendicular to the plane of the base, two magnets attached to the lower ends of the metal cables, while The supporting elements are legs with telescopic connections, the upper ends of which are secured with screw connections on the surface of the base and extend in its plane and at right angles to each other.

The essence of the utility model is illustrated in Fig. 1 and fig. 2, which shows a diagram of the proposed device.

A device for determining the upper generatrix of a pipeline consists of a base (1) made of any durable material, for example, metal in the shape of a pentagon with sides ranging from 20 cm to 50 cm in length and a plate thickness from 3 mm to 10 mm. The lower edge of the base (1) has the shape of a semicircle directed towards the inside of the figure. On the surface of the base (1) there are fixed support legs (2,3), made of any durable material, for example, metal and having telescopic connections (4,5). The legs (2,3) are secured to the base (1) with fastening (6,7) and clamping (8,9) screws. On one of the surfaces of the base (1) a tube (10) for attaching a geodetic pole (11) is vertically fixed, for example welded. The geodetic pole (11) is fixed in the tube (10) with a clamping screw (12). Any prismatic reflector (14) with any round bubble level (15) with an accuracy of at least 0.5 mm, for example, Vega MP03P, is fixed to the geodetic pole (12) with the ability to move along it with a clamping screw (13).

Two ears (16,17) (Fig. 2) are welded to the top of the tube (10) on opposite sides for fastening metal cables (18,19) with a length from 30 cm to 50 cm and a cross-sectional diameter from 1 mm to 3 mm. The opposite ends of the cables (18,19) are attached by knots to the ears (20,21) of the magnets (22,23), the pull-out force of which ranges from 5 kg/s to 15 kg/s, in order to attract the device to the pipeline even through the insulating coating.

In the base (1), along the lower side inclined edges at a distance from the edge of no less than 0.5 cm and no more than 5 cm, there are four technological holes on each side (24-31) for fixing the support legs with clamping screws (8.9). 2,3) at an angle corresponding to the diameter of the pipeline being measured.

The proposed device for determining the upper generatrix of a pipeline operates as follows.

In accordance with the diameter of the pipeline being measured (32), adjust the length of the support legs (2,3), secured with screws (6,7), and their connections (4,5). Set the angle between the support legs (2,3) by selecting the appropriate technological holes (24-31) in the base (1) and fix the legs (2,3) with clamping screws (8,9).

The device is installed on the pipeline (32), so that the support legs (2,3) touch the pipeline generatrix (32). The geodetic pole (11), fixed in the tube (10), is lowered until it comes into contact with the pipeline generatrix (32) and fixed with a clamping screw (12). The reflector (14) is fixed with a clamp (13) to a geodetic pole (11). Using the level (15) in the reflector (14), the strictly vertical position of the device is adjusted, so that the point of contact of the geodetic rod (11) and the pipeline (32) is the upper generatrix of the pipeline (32). Then, moving the magnets (22,23) in different directions away from the device, thereby tensioning the cables (18,19) secured in the ears (16,17) between the magnets (22,23) and the device. Then geodetic measurements are performed on the reflector (14).

The device for determining the upper generatrix is used at the facilities of Gazprom Transgaz Nizhny Novgorod LLC to determine the bending angle of cold bend bends and has undergone trial operation for more than 5 years, during which time more than 100 objects have been measured, for example:

1. MG “Pochinki-Yaroslavl” 269.54 km.

2. MG "Gorky - Center" 106 km.

3. Stand at the industrial site of the Emergency Recovery Works Department of the UAVR in Bogorodsk. Geodetic survey

4. Section of the Yamburg - Tula 1 main gas pipeline.

5. MG "Urengoy-Center II" 2378-2386 km.

6. MG Pochinkovsky LPUMG (Control measurements of angles of cold bending bends. The device showed the best result in comparison with devices of surveyors of other health facilities).

7. MG "Urengoy-Center 2" Zavolzhsky LPUMG Elimination of consequences of the accident on the MG.

Thus, the proposed utility model makes it possible to simplify the determination of the upper generatrix of the pipeline. Due to two metal cables with magnets, the device is fixed without additional support on the pipeline being measured in a stationary state. Due to the universal base with technological holes for fastening and adjusting the support legs for pipes of different diameters, the device allows you to quickly create the required working configuration. Due to the telescopic connections of the support legs, the device is installed on pipes with a diameter of up to 1 m without additional preparatory work, for example, work on organizing a recess near the pipeline at the installation site of the device.

Claims (1)

A device for determining the upper generatrix of a pipeline, containing a pole with a reflector installed with the possibility of translational movement, with one end of it with a sharp tip located in the middle between the supporting elements, and on the second, extending outward from above, a reflector with a reflector located at right angles to pole with a round bubble level, characterized in that it additionally contains a flat pentagonal vertically located base, the lower edge of which has the shape of a concave semicircle, and four technological holes, a tube fixed vertically in the center on the surface of the base in which the geodetic pole is fixed, two metal cables, the upper ends of which are fixed on the surface of the tube from opposite sides and perpendicular to the plane of the base, two magnets attached to the lower ends of the metal cables, while The supporting elements are legs with telescopic connections, the upper ends of which are secured with screw connections on the surface of the base and extend in its plane and at right angles to each other.

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