SU923642A1 - Spraying apparatus - Google Patents

Description

The invention relates to the application of protective coatings, in particular to devices designed for coating internal surfaces of pipes.

A device for applying material to the inner surface of pipes is known, comprising a housing with a material feed channel and a distribution cone-shaped disc interacting with an outlet section of the housing [C.

The disadvantages of this device are the inability to blow the surface of the product before applying, _{> 5} and the possibility of leakage of material from the device during interruptions in work.

Closest to the present invention is a 'spraying device, _Λ containing a housing with a material feed channel and a cone-shaped outlet section and a spring-loaded distribution cone-shaped disc, interconnected

acting with the exit section of the hull [2].

A disadvantage of this device is the impossibility of applying a high-quality coating to the inner surface of pipes due to the lack of possibility of blowing the surface to clean it before applying the coating, as well as due to the insufficient degree of sawing of the material.

The purpose of the invention is to provide the possibility of applying a high-quality coating on the inner surface of pipes.

This goal is achieved by the fact that the spray device, comprising a housing with a material feed channel and a cone-shaped output section and a spring-loaded distribution cone-shaped disc interacting with the output section of the body, is provided with an air-head covering the body, and the distribution cone-shaped disc is made according to periphery 923642 4

with the guide grooves and installed with a gap to the end of the air head, and the body at the exit section is made with holes.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one.

The spraying device comprises a housing 1 with a material supply channel 2 and a cone-shaped output section 10 ^{and a} distributing cone-shaped disk 4 interacting with the latter with a spring 5, mounted in the housing by means of a rod 6 of fastening nuts 7 and crosses 8., 5

The device is equipped with a female head 9 enclosing the body 1, connecting | Nenea by means of a choke 10, an adapter 11, a nozzle 12, a hollow centralizer 13 for installation in process my pipe with a hollow rod 14 for air supply. The housing 1 is connected to a cap 15 fixed in the air head 9 and connected by means of an adapter 11 to a supply pipe 16 ► 25 of a paint and varnish material. The distribution cone-shaped disc 4 is made peripherally with guide grooves 17 and is installed with a clearance of 18 to the end of the air head 9 · A housing 1m is made at the exit section O 3 with holes 19.

The device works as follows.

A pipe with a centralizer 13, which is connected by a hollow rod 14 to a compressor ¹⁰ litter (not shown), is passed through a pipe whose inner surface ³⁵ is to be coated with paint-and-lacquer material, and a pipe 16 to the feeder with paint-and-lacquer material (not shown). The paintwork material is applied after blasting and removal of dust and extraneous ⁴⁵ inclusions from the coated inner surface of the pipes. Then in the housing 1 serves paint material under pressure. Thus spring 5 is compressed, switchgear ⁵⁰ ny conical disc 4 is moved by the rod 6 and between the disk 4 and the outlet portion 3 of the housing 1 is formed an annular gap. Located in the housing 1, the liquid material 55 enters the guide grooves 17, is evenly distributed under the action of air directed onto the distribution disc 4 through the openings 19 of the housing 1, picked up by air flowing out of the annular gap between the housing 1 and the air cap 9, and sprayed under the action of the guide grooves 17 is fan-shapedly directed onto the inner surface of the pipe.

The device allows to produce a uniform multi-layer, and, consequently, a continuous coating without pores of practically any optimal thickness. Adjustment of the application of paint material is produced by changing the pressure in the hollow rod and tube.

The proposed device is simple in design and convenient to use. The device does not require precise centering along the pipe axis, since the distribution disk with grooves is directed perpendicular to the inner surface, and the guide grooves give the paintwork material particles a tangential movement, which ensures the fanability and equals | Dimensionality of a paint and varnish covering.

When applying paintwork material to the inner surface of pipes, it is possible to blow the inner surface both before coating and after applying it for drying and polymerization of the applied layer. Using this device, it is possible to produce a multilayer coating with a significant reduction in time, as well as to eliminate pores and possible defects in coatings.

The proposed device can be used both in stationary and in field conditions to cover the entire inner surface or only the welds of the laid pipeline, protecting the inner surface from the effects of aggressive transportable media, which reduces the number of repairs and prevents environmental pollution.

Claims (1)

Claim A spraying device comprising a housing with a material feed channel and a cone-shaped outlet section and a spring-loaded distribution cone-shaped disk interacting with the outlet section of the housing, 5 923642 6 characterized in that, in order to ensure the possibility of applying a high-quality coating on the inner surface of pipes, it is provided with an air head covering the body, and a distribution cone-shaped disc is made peripherally with guide grooves and installed with a clearance to the end of the air head; The plot is made with holes.