SU1242258A1 - Arrangement for applying a coating on internal surface of tubes - Google Patents

Description

The invention relates to a device for spraying materials and can be used for coating the inner surface of articles such as pipes.

The purpose of the invention is to improve the quality of the coating and reduce the consumption of materials.

The drawing shows a device for applying a cover to the inner surface of the pipes.

The device for coating the inner surface of the pipes contains a rotational drive and axial displacement (not shown) of pipe 1 and the last strap 2 installed with the nozzle 3 supplying the sprayed material, block 4 with nozzles 5 and disc 6. Nozzles 5 in block 4 are located along the helix. The disk 6 is mounted in front of the block 4 on the nozzle 3 with the possibility of free rotation and provided peripherally with blades 7.

The device is equipped with successively installed additional (one is shown) blocks 8 and nozzles 9, supplying the material to be sprayed by nozzles 10 and discs 11 with vanes 12. Additional blocks 8, as well as disks 6 and 11 are mounted with the possibility of axial displacement relative to nozzle 3 and block 4.

The device for coating the inner surface of the pipes works in the following way.

First, the tube 1 is heated to the melting point of the material of the applied coating. The heated pipe is brought closer to block 4 by means of a drive of rotation and axial movement. The applied material

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The supply of the proposed device with additional blocks with nozzles allows the coating to be applied in a single pass with a greater thickness and to use various materials for coating. Making the nozzle through-flow section of a subsequent block with a smaller section of the nozzles of the previous block allows Fioc to be applied, ie, coatings with a smaller thickness, which contributes to flattening iiopoinKa and obtaining a uniform coating.

Installation of additional units with nozzles and disks with blades on the nozzle with the possibility of axial movement

coating in the form of an air-powder mixture 35 allows you to adjust the time interval

It is fed through the nozzle 3 to the block 4 and is sprayed through the nozzles 5. With a gradual pushing of the rotating tube 1 onto the shank 2, a foaming of the pipe occurs on the inner surface of the tube 1 and its melting. .. Excess air created in the sprayed area exits through the space between the disk and the tube to the outside.

between application of coating layers depending on the time required to melt the powder.

The use of the present invention allows improving the quality of the coating and reducing the consumption of materials in case of a lowering of the coating on the inner surface of the pipes.

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The resulting air flow interacts with the blade 7 and causes the disk 6 to rotate. The particles caught by the air flow that do not attach to the inner surface of the pipe impact the blades of the rotated disk, they are thrown back to the treated surface of the pipe and form an additional coating when it melts on its inner surface .

When mounted on the nozzle 3 additional units 8 with nozzles 9, supplying the material being sprayed by the nozzles 10 and disks 11 with vanes 12, the device allows applying a multilayer coating of the same or different powder materials. The location of the nozzles in the block along a helical line creates conditions for overlapping the zones of the formed flares, which increases the uniformity of the coating.

Separation of the air-poro mixture by a rotating blade disc improves the quality of the coating by producing an additional layer on the treated surface of the pipe and reduces material consumption.

The supply of the proposed device with additional blocks with nozzles allows the coating to be applied in a single pass with a greater thickness and to use various materials for coating. Making the nozzle through-flow section of a subsequent block with a smaller section of the nozzles of the previous block allows Fioc to be applied, ie, coatings with a smaller thickness, which contributes to flattening iiopoinKa and obtaining a uniform coating.

Installation of additional units with nozzles and disks with blades on the nozzle with the possibility of axial movement

between application of coating layers depending on the time required to melt the powder.

The use of the present invention allows improving the quality of the coating and reducing the consumption of materials in case of a lowering of the coating on the inner surface of the pipes.

Claims (2)

1. DEVICE FOR APPLICATION OF COATING ON THE INTERNAL SURFACE OF PIPES, containing a drive for rotation and axial movement of the pipe, a rod located coaxially to the pipe, and a nozzle for supplying sprayed material with a nozzle block and a disk, characterized in that, in order to improve the quality of coating and reduce material consumption, the nozzles are located along a helical line, and the disk is made in the blades on the periphery and mounted on the nozzle behind the nozzles with the possibility of free rotation. 2. The device according to π. 1, characterized in that, in order to expand technological capabilities, it is equipped with additional nozzles for supplying atomized material with nozzle blocks and discs with blades mounted in series and coaxial to the main nozzle, while the nozzle passage section of each subsequent block is smaller than the nozzle passage section of the previous block. (L u 4 ^ bj e ql