RU62041U1 - SPRAY GUN FOR APPLICATION AND FILLING OF TWO-COMPONENT HIGH-REACTIVE MIXTURES - Google Patents

Abstract

The utility model relates to the field of production of polymeric materials, in particular for spraying and pouring with polyurethane foam for the purpose of thermal insulation in construction. The purpose of creating a utility model is to simplify the design, increase reliability, reduce weight and simplify maintenance. The spray gun contains a housing with channels for supplying compressed air and components, a mixing channel, a cap with a nozzle and a plug valve. 5 pf, 7 ill.

Description

The utility model relates to the field of production of polymeric materials, in particular for spraying and pouring with polyurethane foam for the purpose of thermal insulation in construction.

A device for spraying highly reactive mixtures is known, comprising a housing with a mixing chamber and channels for supplying components, the outlet openings of which are placed diametrically opposite on the periphery of the bottom of the mixing chamber with compressed air supply channels, the outlet openings of which are diametrically opposed and adjacent to the outlet openings of the component input channels (one).

Also known is a spray gun for applying multicomponent mixtures, comprising a housing with supply channels for components and compressed air, a mixing chamber and a cap with a nozzle (2).

A common disadvantage of the known device (1) and the spray gun (2) is the increased complexity of the design, significant weight, which increases the complexity of use, low reliability due to clogging of the mixing chamber by the reaction products of the components and the complexity of cleaning the channels.

The purpose of creating a utility model is to simplify the design, increase reliability, reduce weight and simplify maintenance.

This goal is achieved by the fact that the housing forms a compressed air cavity and a mixing channel connected to it from opposite ends, made in the form of a groove between two plane-parallel protrusions, and the inlet openings of the component supply channels are located at opposite ends of the mixing channel, and plane-parallel protrusions forming the mixing channel can be made with two transverse grooves for the passage of compressed air in the nozzle area, two sections can be located in the central part of the mixing channel of component streams made in the form of vertical pins, two curved flow swirlers can be located in the central section of the mixing channel and a component stream mixer can be located in the central section of the mixing channel, made in the form of a ring with two diametrical grooves perpendicular to the axis of the mixing channel.

Comparison of the proposed spray gun with other known devices showed its compliance with the criteria of a utility model.

The utility model is illustrated by graphic material.

Figure 1 shows a General view of the spray gun, a section; figure 2 shows a section aa in figure 1; figure 3 shows a front view of the spray gun with the cover removed, figure 4 shows the front view of the spray gun with the cover removed, an embodiment with two flow dividers made in the form of pins; figure 5 is a front view of the spray gun with the cap removed, an embodiment with two curved witnesses of component flows; figure 6 is a front view of the spray gun with the cover removed, an embodiment of plane-parallel protrusions with transverse grooves; Fig. 7 is a front view of a spray gun with the cap removed, an embodiment with a flow mixer made in the form of a ring with two diametrical grooves.

The proposed spray gun contains a housing 1 with a cover 2 provided with a replaceable nozzle 3. A housing 1 with a cover 2 forms a cavity 4 of compressed air and a mixing channel 5 connected to it from opposite ends, made in the form of a groove between the plane-parallel protrusions 6, the outlet openings of the channels 7 feed components are located at opposite ends of the mixing channel 5, combined with the ends with the cavity 4 of compressed air. The housing 1 is equipped with a plug valve 8.

Plane-parallel protrusions 6 can be with transverse grooves 9 for the passage of compressed air.

In the Central part of the mixing channel 5 can be placed two separator flows of components made in the form of vertical pins 10.

In the Central section of the channel 5 can be placed curved swirlers 11 component flows.

In the central section of the mixing channel 5, a flow mixer may be arranged in the form of a ring 12 with diametral grooves that are perpendicular to the axis of the mixing channel 5.

The spray gun is used as follows: from a pressure hose through a channel 13 passing through a housing 1, a valve plug 8 and a check valve 14, compressed air regulated by a screw 15 is supplied to a cavity 4 formed by a housing 1 and a cover 2. Then, compressed air from cavity 4 enters from two sides into the mixing channel 5.

With the position of the valve plug 8, to the “open” position, components A and B with the pumps turned on, are fed into the mixing channel 5 through the supply channels of the components 7.

Upon entering the mixing channel, the components are picked up by oncoming streams of compressed air and collide, after which they enter the nozzle 3.

When leaving the nozzle 3, the mixture is sprayed due to a sharp expansion of air. After spraying, the pumps are turned off by button 16 and the crane handle is moved to the "closed" position. At

This compressed air continues to flow into the mixing channel and cleans the remaining mixture. It is possible to turn off the compressed air by setting the lever 17 of the crane in an intermediate position. The stopper of the crane is equipped with sealing rubber rings 18.

The presence of grooves 9 in the protrusions 6 allows you to intensify the mixing of the components.

The presence of flow separators made in the form of pins 10 can increase the turbulence of the flows and improve the mixing process.

The presence of curved swirls 11 flows increases the efficiency of mixing the components.

The presence of a flow mixer made in the form of a ring with 12 m grooves increases the efficiency of mixing the components.

The proposed spray gun is simple in design and reliable in operation, it is possible and appropriate to use it for thermal insulation in construction by spraying or pouring.

INFORMATION SOURCES:

1. Auth. testimonial. USSR No. 1502125, Cl. B 05 B 7/04, 1989.

2. RF patent №2012423, Cl. B 05 B 7/04, 1994

Claims (5)

1. The spray gun for applying and pouring two-component highly reactive mixtures, comprising a housing with components and compressed air supply channels, a cap with a nozzle and a plug valve, characterized in that the housing forms a compressed air cavity and a mixing channel communicating with it from opposite ends made in the form of a groove between two plane-parallel protrusions, and the inlet openings of the component supply channels are located at opposite ends of the mixing channel. 2. The spray gun according to claim 1, characterized in that the plane-parallel protrusions forming the mixing channel are made with two transverse grooves for the passage of compressed air in the nozzle area. 3. The spray gun according to claim 1, characterized in that in the Central part of the mixing channel there are two separator streams of components, made in the form of vertical pins. 4. The spray gun according to claim 1, characterized in that in the Central section of the mixing channel there are two curved swirls of the component flows. 5. The spray gun according to claim 1, characterized in that in the central section of the mixing channel there is a flow mixer made in the form of a ring with two diametrical grooves perpendicular to the axis of the mixing channel.