RU97065U1 - DEVICE FOR APPLICATION OF COATING ON THE INTERNAL SURFACE OF THE PIPE - Google Patents

Abstract

 1. Device for coating the inner surface of the pipe, consisting of roller blocks mounted on the base and used to install pipes with the possibility of rotation, at least one of which has a drive for the rotational movement of the rollers; arrows mounted on supports fixed to the base, with the possibility of reciprocating movement inside the pipe; hoses placed inside the boom and used to supply liquid components (base and hardener) under pressure from sources to the nozzle; support fixed at the end of the boom; boom drive, characterized in that the boom is telescopic and includes a fixed part mounted on supports fixed to the base and a movable part with hoses and a nozzle at its end, and a movable part of the telescopic boom mounted on it fixed part. ! 2. The device according to claim 1, characterized in that the hoses are connected to a mixer mounted on the end of the boom in front of the nozzle. ! 3. The device according to claim 1, characterized in that the supports of the telescopic boom have a device for adjusting their height.

Description

The utility model relates to devices for applying liquid polymer compositions to the inner surfaces of pipes intended for the construction of pipelines for various purposes: high and low pressure pipelines, gas pipelines, oil pipelines.

A device for applying a polymer coating on the inner surface of the pipe (GB patent No. 954828 of 12/10/1961), consisting of:

- installed on the basis of a roller table for pipes having a pair of rollers with a drive for their rotational movement, as well as a device for heating the pipe,

- a hollow boom with nozzles at its end, used for spraying on the inner surface of the pipe polymer powder supplied through the cavity of the boom,

- installations for feeding powder into the boom cavity with air under pressure,

- boom drive for its entry into the pipe and output from the pipe. The disadvantage of the installation is the need to apply a layer of polymer material 6-10 mm thick on the inner surface of the pipe to ensure continuity of the polymer coating and the absence of uncovered sections of the pipe surface, as well as significant energy costs for heating the pipe to a temperature of 190 ° C-230 ° C for melting the polymer powder material.

A device is known for painting the inner surface of the pipe (JP patent publ. No. 57091780 from 11.26.80), heated to 180 ° C-270 ° C.

The device has means of rotation and translational movement of the pipe and a stationary hollow boom with three nozzles at its end with pipes brought to them through which paints are supplied to form a three-layer coating.

The disadvantage of this device is the significant energy consumption for heating the pipe and the high inertia of its translational motion when it is pushed onto the boom with nozzles for coating and in the reverse movement.

A device for applying a single-layer epoxy coating on the inner surface of the pipe (patent KR No. 100141653 dated 05/30/1994), consisting of a pair of guide rails, a trolley reciprocating along rails connected to a hollow boom, with a hose inside the boom, attached to a paint source through which epoxy paint is supplied; supports and directing arrows; a nozzle attached to the end of the boom, directed to the surface of the pipe, the drive of the movement of the truck along the guide rails, which is the drive of the reciprocating movement of the boom; roller blocks mounted on the base and used to install pipes with the possibility of rotation, at least one of which has a drive for the rotational movement of the rollers; boom mounted on supports with the possibility of reciprocating movement inside the pipe; hoses placed inside the boom and used to supply liquid components (base and hardener) under pressure from sources to the nozzle; support fixed at the end of the boom;

- control systems for pipe rotation drives and truck with boom movements during the application of epoxy coating on the pipe inner surface.

The disadvantage of this device is the complexity and inertia of the drive of the trolley and the trolley with an attached boom, which does not allow the boom to be inserted into the pipe at high speed and in a short time.

The technical problem solved by the utility model is the creation of a device for applying a single-layer coating on the inner surface of a steel pipe up to 12 m long and with an outer diameter up to 1420 mm, which allows coating with a thickness of at least 300 microns in one working movement of the boom and nozzle while saving the epoxy composition and at high performance.

The technical problem is solved in the device, consisting of

- roller blocks mounted on the base and used to install pipes with the possibility of rotation, at least one of which has a drive for the rotational movement of the rollers;

- arrows mounted on supports fixed on the base with the possibility of reciprocating movement inside the steel pipe, hoses placed inside the arrow and used to supply liquid components (base and hardener) from sources to the nozzle under pressure; support fixed at the end of the boom; boom drive,

wherein

the boom is telescopic and includes a fixed part mounted on supports fixed to the base and a movable part with hoses and a nozzle placed at it at its end, and the drive of the movable part of the telescopic boom is mounted on its fixed part.

Hoses are attached to the mixer mounted on the end of the boom in front of the nozzle. This arrangement of the mixer reduces the cleaning time of the mixer and nozzle from the remnants of the epoxy composition, and also saves both the epoxy composition and the cleaner.

The supports of the telescopic boom have a device for adjusting their height. When setting to coating the inner surface of a pipe of a different diameter, the roller blocks may have devices for adjusting their height position and devices for adjusting their relative position (not shown).

The technical effect of saving the epoxy composition and the high performance of its deposition on the inner surface of the pipe is achieved due to the fact that the boom is telescopic and includes a fixed part mounted on supports fixed to the base and a movable part with hoses and a nozzle placed on it its end; the drive of the movable part of the telescopic boom is mounted on its fixed part; telescopic boom supports have a device for adjusting their height; hoses are connected to a mixer mounted on the end of the boom in front of the nozzle.

Distinctive features or features equivalent to them are not found in the scientific, technical and patent information, which indicates the compliance of the utility model with the criterion of "novelty."

Figure 1 shows a diagram of a device for applying an epoxy composition to the inner surface of a pipe.

The device (figure 1) consists of

- mounted on the basis of 1 roller blocks 2 and used to install pipes 3 with the possibility of rotation, at least one of which has a drive 4 of the rotational movement of the rollers;

- mounted on supports 5 with the possibility of reciprocating movement inside the pipe 3 of the telescopic boom 6 with hoses 7, 8 placed in it for supplying under pressure liquid components (base and hardener) from sources 9a, 96 to the nozzle 10 mounted on the end 11 of the boom 6 and having a support 12 at the end 11 of the boom 6;

- the boom 6 includes a fixed part 13 mounted on supports 14 mounted on the base 1 and a movable part 15 with hoses 7, 8 and a nozzle 10 at its end 11 placed therein; on the fixed part 13 of the telescopic boom 6, an electromechanical drive 16 is fixed.

The supports 5 of the fixed part 13 of the telescopic boom 6 have a device 17 for regulating their height.

Roller blocks 2 may have devices for adjusting their height position (not shown) and their relative position (not shown).

Hoses 7, 8 are connected to the mixer 18 mounted on the end 11 of the movable part 16 of the boom 6 in front of the nozzle 10.

For applying an epoxy coating to the inner surface of the pipe 3 is installed on the rollers of the blocks 2.

Using the drive 16, the movable part 15 with the mixer 18 and the nozzle 10 is quickly (within 0.25 min - 1 min) inserted into the pipe 3 to its end farthest from the fixed part of the boom 6. The pipe 3 is rotationally driven by a 4-roller drive and includes feeding the two-component epoxy composition from sources 9a and 96 through the hoses 7, 8 of the mixer 18 and the nozzle 10. Through the nozzle 10, the epoxy composition is sprayed as a torch and applied to the inner surface of the pipe 3, forming a screw strip width, depending on the length of the torch and the step determined by the formula:

where S is the pitch of the helical strip on the inner surface of the pipe, m;

υ _p is the speed of the working movement of the moving part 13 of the boom 6, m / min;

n _mp is the pipe speed, min ^-1 .

After the movable part 15 leaves the pipe 3, the epoxy composition is stopped, the pipe with the applied composition is removed from the rollers, the next pipe is installed on the rollers and the movable part 15 of the boom 6 is quickly inserted to the far end of the pipe. At a high speed (12 m / min - 48 m / min) of introducing the movable part 15 into the pipe and a short tube change time, the epoxy composition does not have time to begin to cure in the mixer and nozzle; therefore, their washing with a cleaner is not required. This achieves an increase in the productivity of the device and the saving of a two-component epoxy composition and cleaner.

Tests of the device manufactured by Pipe Insulation Plant LLC showed its operability and high performance when applying the Amercoat 391 PC two-component epoxy solution-free coating on straight-seam pipes with a diameter of 273 to 1420 mm and spiral-seam with a diameter of 530 to 1420 mm.

During testing, the rate of entry of the low-inertia moving part 15 of the boom 6 into the pipe 3 from 12 to 48 m / min, the speed of its output during the painting process of 0.5 m / min or more was achieved. Due to the high speed of entry of the movable part 15 of the boom 6 into the pipe 3, the need to clean the mixer 18 and nozzle 10 from the epoxy composition is eliminated, since before the coating of the next pipe begins, the epoxy composition does not have time to cure.

Claims (3)

1. Device for coating the inner surface of the pipe, consisting of roller blocks mounted on the base and used to install pipes with the possibility of rotation, at least one of which has a drive for the rotational movement of the rollers; arrows mounted on supports fixed to the base, with the possibility of reciprocating movement inside the pipe; hoses placed inside the boom and used to supply liquid components (base and hardener) under pressure from sources to the nozzle; support fixed at the end of the boom; boom drive, characterized in that the boom is telescopic and includes a fixed part mounted on supports fixed to the base and a movable part with hoses and a nozzle at its end, and a movable part of the telescopic boom mounted on it fixed part. 2. The device according to claim 1, characterized in that the hoses are connected to a mixer mounted on the end of the boom in front of the nozzle. 3. The device according to claim 1, characterized in that the supports of the telescopic boom have a device for adjusting their height.