RU231477U1 - PNEUMATIC GUN FOR APPLYING VISCOUS MATERIALS - Google Patents

Abstract

The utility model relates to a pneumatic gun for applying viscous-flowing materials, such as seam or glass sealants. By creating adjustable excess pressure at the outlet of the pneumatic gun, adjustable dosing is provided when applying the viscous-flowing material. Creating alternating modes of adjustable excess pressure and vacuum at the outlet of the pneumatic gun allows filling the cartridge with viscous-flowing material.

Description

The utility model relates to a pneumatic gun for applying viscous materials.

State of the art

Mechanical piston guns are widely known. The principle of operation is based on squeezing the applied substance out of the cartridge by a piston with a rod, by mechanical pressure. The disadvantage is the uneven release of the applied viscous flowing material from the cartridge. Spring-piston pneumatic guns are widely known, for example, from patent US7334709. The principle of their operation is based on compression of the air of the cartridge by a piston with a spring. The reliability of such devices is affected by the wear of the pneumatic mechanisms and low air temperature. In addition, the spring and piston with a rod create additional noise and vibration. Also known is a pneumatic dispensing gun disclosed in application US20080257914, which includes a container having a channel for receiving compressed gas, a cartridge secured to the container, an end cap secured to the cartridge and having a channel communicating with the channel of the container, and a regulating device, which is a spring-valve device, as well as a valve for preventing excess pressure. A disadvantage of the design is a limited service life due to rapid wear of the regulating spring-valve mechanism.

The technical result consists in ensuring reliable operation, consisting of controlled dosing and application of viscous-flowing material.

The essence of the utility model

A pneumatic gun for applying viscous-flowing materials, comprising a body with a first internal channel (6), the input of which is connected to a high-pressure source, as well as a second internal channel (7), the output of which is connected through a nozzle to a nozzle (8) containing a cartridge with a floating piston (9) installed inside, wherein the first and second internal channels are connected to each other through a series-connected: first full-bore valve (1) for regulating the input air pressure and an ejector (3), wherein a safety valve (4) is installed at the output of the second channel to relieve excess pressure, a second full-bore valve (2) is installed at the output of the first internal channel to create a vacuum or excess pressure at the output of the second internal channel (7).

The creation of excess pressure at the outlet of the second internal channel, acting on the floating piston (9) in the nozzle (8), ensures the outlet of the viscous flow material from the cartridge. The creation of vacuum at the outlet of the second internal channel (7), acting on the floating piston (9) in the nozzle (8), ensures the return of the floating piston (9) to its original position and self-filling of the cartridge.

At the input of the first internal channel, a trigger-type pressure mechanism can be installed to regulate the input excess pressure supplied to the input of the pneumatic pistol.

A measuring device (5) can be installed at the outlet of the pneumatic gun to control the pressure supplied to the inlet of the nozzle (8).

Description of drawings

Fig. 1 – schematic representation of a pneumatic gun for applying viscous materials

Fig. 2 – schematic diagram of a pneumatic gun for applying viscous materials.

Fig. 3 – schematic representation of a pneumatic gun with an attached nozzle with a cartridge for viscous materials.

Positions on drawings:

1. The first full bore crane.

2. Second full bore valve.

3. Ejector.

4. Safety valve.

5. Measuring device.

6. The first internal channel.

7. Second internal channel.

8. Nozzle with cartridge.

9. Floating piston.

Implementation of a utility model

The operation of the device will be described with references to the corresponding positions of the drawings. In the non-working mode of the pneumatic gun, with the full-bore valve (1) closed, the pressure at the inlet to the first internal channel (6) is in the range of 0.5 MPa - 0.8 MPa. In the working mode, it is necessary to open the full-bore valve (1). The air pressure, passing through the ejector (3), at the outlet of the second internal channel (7), with the full-bore valve (2) closed, decreases with the help of the open safety valve (4) to approximately a value of 0.2 MPa, which is sufficient for the displacement of the floating piston installed in the cartridge. The pressure at the outlet of the second internal channel (7) is monitored using a measuring device (5), for example a pressure and vacuum gauge installed between the outlet of the second internal channel (7) and the safety valve (4). The pressure at the inlet of the pneumatic gun is regulated, for example, using a trigger pressing mechanism installed at the inlet of the first internal channel (6). After emptying the nozzle cartridge (8), the return of the floating piston to its original position is ensured by creating a vacuum at the outlet of the first internal channel (6). To do this, open the full-bore valve (2). With the full-bore valve (1) open and the safety valve (4) closed, the air pressure passing through the ejector (3) will be released through the full-bore valve (2) and at the outlet of the second internal channel (7), i.e. in the area of the pressure gauge (5) and the safety valve (4), a vacuum of at least - 0.08 MPa will be formed. As a result, the floating piston (9) will return to its original position. When lowering the outlet spout of the nozzle cartridge (8) into the container with the applied viscous flowing material, the cartridge will be filled again. The floating piston installed inside the cartridge with the nozzle ensures the possibility of its free movement due to the creation of alternating modes of vacuum and excess pressure at the outlet of the pneumatic gun in the device. Due to the absence of mechanical spring and rod-piston mechanisms in the proposed device, reliable operation of the pneumatic gun is ensured. With the alternate use of modes of creating excess pressure and vacuum at the outlet of the pneumatic gun, the possibility of filling the cartridge (8) with viscous material is ensured.

Claims (3)

1. A pneumatic gun for applying viscous flowing materials, comprising a body with a first internal channel (6), the input of which is connected to a high pressure source, as well as a second internal channel (7), the output of which is connected through a nozzle to a nozzle (8) containing a cartridge with a floating piston (9) installed inside, wherein the first and second internal channels are connected to each other through a series-connected: first full-bore valve (1) for regulating the input air pressure and an ejector (3), wherein a safety valve (4) is installed at the output of the second channel to relieve excess pressure, a second full-bore valve (2) is installed at the output of the first internal channel to create a vacuum or excess pressure at the output of the second internal channel. 2. A pneumatic pistol according to claim 1, in which a trigger-type pressure mechanism is installed at the input of the first internal channel for regulating the pressure supplied to the input of the pneumatic pistol. 3. A pneumatic gun according to claim 1, in which a measuring device (5) is installed at the outlet of the pneumatic gun to control the pressure supplied to the inlet of the nozzle (8).