SU582846A1 - Spray gun - Google Patents

Description

one

The invention relates to the field of applying paint coatings to lnbo other liquids by airless spraying under high pressure and is used mainly in shipbuilding and ship repair.

A pistol dispenser is known, comprising a housing, suction and discharge valves, a plunger, a hammer, a sear, a trigger, a guide rod, a guide rod of the sear, a hinged joint of the sear 1.

The disadvantage of this gun is the impossibility of its use when painting large areas, due to the pulse supply of paint, carried out by continuous reciprocating movement of the plunger, driven by the movement of the trigger.

Also known is an airless spray gun, the valve mechanism of which contains a needle rigidly mounted in a pin hole, guided by the gun body and passing through a high-pressure cavity. The pistol fixing device contains a spring-loaded plate fixed on the trigger with an axis allowing the plate to rotate. The safety device contains a liner with a niric stopper of the angular position of the liner and a membrane 2.

The disadvantage of this spray gun is the high accuracy requirements for the manufacture of parts to ensure the reliability of the valve mechanism, the complexity of the locking and safety devices.

The purpose of the invention is to increase the reliability of the valve mechanism, improve its technological qualities, simplify the device for fixing the head in the open and closed position.

This goal is achieved by the fact that in the pistol the pusher has a spherical head and is equipped with a needle with a self-aligning sleeve hingedly covering the head of the pusher, the pusher being connected to a trigger that is pivotally connected by means of a handle with a handle lock having

5 to place the lock.

Such an embodiment of the device ensures the centering of the needle with the self-suction sleeve, reliably locking the hole in the socket, without requiring high precision in the manufacture and assembly of the valve mechanism; allows un) 01; tit

0 safety and locking device combining them into one, eliminates the need to turn on the pistol, or keep the valve mechanism open without the pressure of the hand to keep the trigger pressed

S position during prolonged operation.

FIG. 1 shows a spray gun, longitudinal section; in fig. 2 and 3 - the position of the parts of the valve mechanism with the socket open and closed, respectively; in fig. 4 - section A - A of FIG. 2

The spray gun has a handle 1, a housing 2 with a tube 3 for the length of the liquid supply.

A cup 4 is fixed in the housing with a socket 5 and a nozzle 6 fixed with a nut 7, a guide sleeve 8 is installed with sealing rings 9 covering the pusher 10 connected to a sleeve having a needle 12. The tail of the pusher 10 is connected through a spigot 13 with the trigger 14 and the spring 15. The trigger 14 is connected by a hinge pull 16 with a latch 17 installed in the Z-shaped groove 18 of the handle I and protruding beyond its cheek.

Fluid is supplied through the tube 3 into the cavity of the housing 2. When the trigger 14 is released, the spring 15 through the threaded sleeve 13 n, the pusher 10 presses the needle 12 to the socket 5, preventing the liquid from exiting through the hole 19 of the socket 5.

When pressing the trigger 14, the threaded sleeve 13 compresses the spring 15 and displaces the pusher with the sleeve II and the needle 12 in the axial direction, the fluid from the cavity 20 of the tube 3 rushes into the rear cavity 21 of the housing 2, then through the channels 22 - into the front cavity 23 and from it through the hole 19 of the socket 5 to the nozzle 6.

When you install the latch 17 in the lower branch of the groove 8 excludes accidental pressing the trigger. When installing the lock at the top

branches of the groove ensures continuous operation of the gun.

Due to the fact that the needle is able to self-install when it is pressed against the socket, reliable locking of the hole of the socket is ensured and the requirements for precision machining and assembly of parts of the valve mechanism are reduced.

The combination of safety and locking devices reduces the number of parts, simplifying the manufacture of the gun.

Geobregeny formula

Spray gun, mainly for airless paintwork materials spraying):, comprising a housing, a valve mechanism consisting of a pusher with a head, a trigger, a handle and a locking device, characterized in that, in order to improve the reliability of the valve mechanism, to improve its technological qualities, simplify the device for fixing the head in the open and closed positions, the pusher has a spherical head and is equipped with a needle and a self-aligning sleeve, hingedly covering the head of the pusher, and The pusher is connected to the trigger, the joint is connected by means of a rod with a fastener handle, having a Z-shaped groove for accommodating the retainer.

Sources of evidence that are taken into account during the examination:

}. Author's certificate number 204187, cl. B 05 B 7/02, 08/09/76.

2. US patent No. 3515355, cl. 239-526, 04/12/68.