SU776647A2 - Sprayer - Google Patents

Description

(54) SPRAYER

The invention relates to high pressure painting equipment, in particular, to airless sprayers with the creation of external pressure inside the sprayer.

The invention can be used in enterprises of different branches of the machine building industry, when painting large-sized products at assembly sites, with frequent mixing of the painting site, if necessary, the consumption of paint and varnish material, and frequent replacement of manual pneumatic paint sprayers.

Known spray on auth. St. No. 598653, comprising a housing with a spray head, a cylindrical cylinder with a piston rigidly connected to an ionizer, a free end into a cavity for the sprayed liquid arranged in the housing, a spool placed parallel to the plunger in the channel chamber, which connects it to the pneumatic cylinder cavity and the compressed pipeline air, and a spool switching mechanism, made in the form of a non-cylinder cylinder connected to the piston by means of a rod engine with a notch co-activating with the surface of the body, the valve core being rigidly fitted with union of the piston with it, again. a spaced cavity in the body, which communicates with the compressed air supply line through the channels made in the corus, the output holes 5 of which are located on the surface of the body in contact with the stem-slide 1.

The disadvantage of the sprayer is that it is impossible to regulate the productivity of the process without changing the working pressure on the material being sprayed.

Meanwhile, as shown by the industrial application of airless paint sprays of 5 dust blowers with the creation of pressure inside,. for co-secret conditions of work, depending on the cross section, spraying it, its force (paint material consumption through a nozzle), the type of material being sprayed

20, its viscosity, and it is necessary to select a certain (optimal) frequency of the plunger strokes, which increases the efficiency of the use of spray guns.

The aim of the invention is to provide a 25 x regulated output.

.. sprayer i: high dispersion flared.

The delivered nel is achieved by the fact that in the spray gun, comprising a housing with a spray head, a pneumatic cylinder with

a piston rigidly connected to the plunger, the incoming free end to the cavity for the sprayed liquid made in the housing, the spool placed parallel to the plunger in the chamber with channels that connect it to the pneumatic cylinder and the compressed air line, and connected to the piston of the pneumatic cylinder by means of a stem engine with a recess in contact with the surface of the body, and the valve is provided with a piston rigidly connected to it, placed in a cavity made in the body and communicating with the compressed air supply line through channels in the casing, the outlet openings of which are located on the casing surface in contact with the slider according to the invention, a choke is installed on the compressed air supply line to the spool switching mechanism.

On the presented drawing shows a General view of the spray.

The atomizer comprises a housing, / with a pneumatic cylinder 2 and a high pressure chamber 3 with suction 4 and pressure 5 valves. A spray head 7 is fixed to the housing 6 of the discharge valve 5. In the pneumatic cylinder 2 there is a piston iS rigidly connected to the plunger 9. The free end of the plunger 9 enters the cavity for the sprayed liquid. (The piston 8 is rigidly connected to the engine (10 with a notch, //. The engine 10 is pressed with a spring 1/2 to the surface of the housing /. The channels 11 and M of the notch 11 are connected to the cavity i / 5.

Flat spring-loaded spool 16 is rigidly connected to the piston - / 7, located in the cavity, 15.

(The IS chamber, in which the spool 16 is located, communicates via channel J9 through valve 20 to the compressed air supply line, via channel 21 / to the atmosphere (noise attenuating device not shown), and via channels 22 and 23 to pneumatic cylinder 2.

Channel 19 communicates with channel 24, which is brought to the surface of housing J, in contact with the slider, 10.

On the compressed air supply line to the switching mechanism of the spool 16, i.e. in the channel 24, a choke 2S is installed.

The surface of the housing in contact with the engine 10 and the spool 16, equipped with plates of wear-resistant material or hard coating.

The spray works as follows.

When the trigger is pressed, the valve 20 opens, the air is compressed through the channel 19 into the chamber 18 and further through channel 22 into the pneumatic cylinder 2. The piston 8 moves to the left, the air from the left side of the pneumatic cylinder passes through channel 23, the recess of the spool 16 and channel 21 through noise absorbing device into the atmosphere. Together with piston 8, the W engine moves to the left. When the engine with its notch (i) connects channels 13 and 24, the air passes through channel .19, through throttle 25 and channels 24 and J3 to the left part of the cavity J5 and moves piston 1 (7) sixteen

to the right. In doing so, the channels 21 and 22 are connected by a recess of the spool 16, the air from the right side of the pneumatic cylinder is released into the atmosphere, and the piston 8 is moved to the right by the action of air entering

through channels 19 and 23 to the left side of the pneumatic cylinder. With the piston 8, the slider moves to the right, 10 and again connects channels J4 and 24 with its notch, air enters the cavity 15, shifts the piston 17 and the il6 valve to the left, etc.

Thus, when the trigger is pressed, a constant reciprocating movement of the plunger is performed: when the piston moves to the right, the paintwork material is sucked into the cavity 3, while moving to the left, high pressure is pumped through the valve 5 and the paintworking material is sprayed through the spray head 7.

The flow of paint material through the nozzle is controlled by changing the number of plunger strokes per minute. By means of the throttles 25, the cross section of the channel 24 is changed (and as a result, the amount of air), as a result of which the frequency of the spool and piston strokes is changed. In this case, the pressure on the piston does not change, which ensures a high dispersion of the spray in the entire range of spray gun performance.

Claims (1)

Invention Formula Sprayer auth. St. No. 698653, characterized in that, in order to control the performance of the sprayer and the high dispersion of the spray pattern, install a choke in the compressed air supply line to the switching mechanism of the spool. The source of information taken into account in the examination: :one. USSR Author's Certificate No. 598653, cl. B 05 B 9L4, iB 05 B 7/02, EO. 1-2.76. 525 2 // is t