SU1475724A1 - Airless paint sprayer - Google Patents

Abstract

The invention relates to devices for spraying liquids and applying them to the surface of products and can be used for applying protective coatings by the method of airless spraying of paints and water-borne materials. The purpose of the invention is to reduce the clogging of the sprayer. For this, the airless sprayer is equipped with an ink flow accelerator installed in the outlet channel in front of the filter, and the outlet channel is provided with an expansion chamber located between the filter and the spray head, while the outlet of the spray head is offset from the outlet channel. An additional channel is made in the housing, which communicates the pre-piston part of the cavity with the ink supply channel. The shut-off valve is equipped with a spring release lever with a spring and a spring-loaded lock. The spray head is made in the form of a rotary disc with circumferentially disposed exhaust nozzles of different diameters, mounted to align one of its discharge nozzles with the outlet openings of the exhaust channel, and an additional disc with an opening installed on the end of the main disc with the possibility of combining its opening with one of exhaust nozzles. 3 hp ff, 4 ill.

Description

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The invention relates to devices for spraying liquids and applying them to the surface of products and can be used for applying protective coatings by airless spray paint and waterborne paints.

The purpose of the invention is to reduce the clogging of the sprayer.

Figure 1 shows the airless paint spray; figure 2 - the main disk of the spray nozzle; on fig.Z - spray filter; in fig. 4 - additional disk spray nozzle.

The sprayer includes a housing I, a paint supply channel 2 therein with a shut-off valve 3, an exhaust channel 4 with a spray head 5, and a drain channel 6 with an exhaust valve 7.

In the outlet channel 4 a filter 8 is installed, made in the form of two cylindrical grids installed one century. The size of the internal grid cells is larger than the size of the external grid cells.

In the exhaust channel 4 before the filter 8 is installed accelerator flow of paint 9. The exhaust channel 4 is made

one

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J to

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the expansion chamber 10 located between the filter 8 and the spray head 5. At the same time, the axis of the discharge nozzle of the spray head 5 is offset relative to the axis of the discharge channel 4.

The atomizer has a control mechanism for the shut-off valve 3, made in the form of a rod 11 with the piston 13 installed by the JQ cavity 12 of the housing 1.

In case 1, an additional channel 14 is made, which connects the predplash part of cavity 12 with feed-in channel 2 .15

The shut-off valve 3 is equipped with a release lever 15 with a return spring 16 and a spring-loaded latch 17.

The spray head 5 is made in the form of a rotary disk 18 with discharge nozzles 19 of different diameters placed around the circumference.

The rotary disk 18 is installed with the possibility of combining one of its nozzles 19 with the outlet 20 of the outlet channel 25.

The spray head 5 has an additional disk 21 with an opening 22 mounted on the end of the main disk 18 so that it can be aligned to the opening 22; with one of the exhaust nozzles 19. The main and additional disks 18 and 21 are fixed on the housing 1 by means of a cap nut 23. The housing 1 has a detachable connection 24.

The spray works as follows.

The ink is fed under the pressure of the chip cut channel 2.

When the paint is supplied to the channel 2 of the housing 1, it passes through the additional channel 14 into the pre-piston part of the cavity 12 and creates pressure on the piston 13. The pressure through the piston 13 is transferred to the shut-off needle of valve 3 and ensures reliable overlap of valve 2.

To disperse the paint, release the spring of the retainer 17 and move the lever 15 in the direction of the spray head 5. In the depressed position, the lever 15 is fixed, the retainer 17. Moving the lever 15 leads to the opening of the valve 3.

Paint is applied through the exhaust

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the channel 4 into the flow accelerator 9, which forms in the flow accelerator 9 a jet of ink is directed into the mesh of the filter-1 of that filter 8 passes through its

Jq

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, - before

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cells and enters the plant chamber 10. From the chamber 10, the paint exits through the discharge nozzle 19 of the spray head 5, forming the spray of the sprayed paint and is directed to the surface of the painted product.

To stop painting, release the spring of the latch 17 and move the lever 15 to its original position. At the same time, the locking needle closes the ink supply channel 2.

The reduction of pressure in the exhaust channel 4 when it is clogged is performed with the valve 3 closed, for this purpose the exhaust valve 7 is opened and the paint from the exhaust channel 4 is removed through the drain channel 6.

Cleaning of the outlet channel and the filter 8 from paint residues and foreign particles is carried out by supplying compressed air or water through the spray nozzle 19 of the spray head 5. Paint residues are removed through the drain channel 6.

Supplying the spray gun with an ink flow accelerator located in the exhaust channel in front of the filter and making the exhaust channel with an expander chamber located between the filter and the spray head creates conditions for additional crushing of the paint particles when they hit the screen filter, which reduces clogging of the sprayer and improves the quality of the resulting coating. Supplying the spray gun with a release lever in a return spring and a spring-loaded lock prevents the sprayer from being turned on if the lever is accidentally pressed and allows the colors to be produced in automatic mode.

The implementation of the spray head in the form of a rotary disk with circumferentially disposed discharge nozzles of different diameters expands the technological capabilities of the sprayer.

Equipping the spray head with an additional disc protects the exhaust nozzles from contamination and mechanical damage, and also makes it easy to connect the hoses when cleaning the filter and the exhaust channel.

The use of a sprayer reduces the complexity of the paint and reduces the time spent on its cleaning.

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Pha.1 1

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FIG. 2

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Compiled by G.Dikov Editor I. Segl nick Tehred A. Kravchuk

Order 2106/12

Circulation 564

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101

Proofreader L. Pilipenko

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Claims (4)

Claim 1. An airless paint sprayer comprising a housing, an ink supply channel with a shut-off valve, an outlet channel with a spray head, a drain channel with an exhaust valve, a qi-shaped mesh filter in the outlet channel, and a shut-off valve control mechanism made in a rod with a piston located in the housing cavity, characterized in that, in order to reduce the contamination of the sprayer, it is equipped with an ink flow accelerator installed in the outlet channel before the filter, and the outlet one nal configured expansion chamber 20 located between the filter and hydrochloric spray head, wherein the outlet of the spray head is displaced relative to the discharge passage. - 2. The sprayer according to claim 1, characterized in that an additional channel is made in the housing, communicating the pre-piston part of the cavity with the paint supply channel. 3. Sprayer according to ππ. 1 and 2, characterized in that the shut-off valve is equipped with a release lever with a return spring and a spring-loaded lock. 4. The sprayer according to claims 1 to 3, characterized in that the spray head is made in the form of a rotary disk with circumferential outlet nozzles of various diameters installed with the possibility of combining one of its outlet nozzles with the outlet of the outlet channel, and an additional disk with an opening mounted on the end of the main disk with the possibility of combining its holes with one of. exhaust nozzles. 4> Ig. 2 Fig. 3