SU1351693A1 - Apparatus for applying a liquid - Google Patents

Abstract

The invention relates to devices for applying liquid and other fluid substances to the surfaces of products, for example, for applying control liquid to threaded connections of electrical measuring instruments during their assembly. The purpose of the invention is to improve the quality of the coating. The axial plug in the upper part of the channel 8 of the rod 3 is connected to a source of alternating pressure through the radial hole 10 and the diaphragm 7 of an elastic material. When overpressure (0.15-0.2 MPa) is applied through channel 16, diaphragm 7 deforms inside annular groove 9 and pushes fluid into channel 6, which is in the lower part of axial channel 8. Pressure rod 3 moves upwards, opening channel 6. The floating piston 4 squeezes out the liquid 19 through the open channel 6. After relieving the overpressure, the piston 2 CO e O) with

Description

with the stem 3 returns to its original position, the lower spherical end 11 of the stem 3 enters the spherical socket of the nozzle nozzle 5 and closes the channel 6. The diaphragm 7 returns to its original position, creating a vacuum in the channel 8, which leads to the full application of the liquid and other volatile substances on the surface of the products, for example for applying a test fluid to the threaded connections of electrical measuring instruments when they are used.

The purpose of the invention is to improve the quality of the coating.

The drawing schematically shows a device for applying a liquid.

The device comprises a cylindrical body 1 mounted coaxially in the body 1 of a spring-loaded piston 2, a rod 3 rigidly connected with it, mounted for movement in the axial bore of the floating piston 4, and a nozzle 5 with an axial output channel 6. The device is provided with an elastic diaphragm 7 of elastic - an elastic material, and in the rod 3 there is an axially muffled channel 8 in the upper part and on its surface above the floating piston 4 there is an annular groove 9 in which the diaphragm 7 is placed. The channel 8 of the rod 3 is connected to the groove 9 by a radial response Space 10. The bottom end 11 of the stem 3 is spherical, and in the nozzle nozzle 5 there is a spherical seat under the spherical end 11 of the stem 3. The cylindrical body 1 is equipped with a cover 12 with a head 13 for fastening the device in the tong of the industrial robot. The piston 2 is spring-loaded by the spring 14. The cavity 15 between the pistons 2 and 4 is connected by a channel 16 to a variable pressure source (not shown), and the cavity 17 between 12 and the piston 2 is connected by a channel 18 to the atmosphere. Liquid 19 placed in housing 1 under floating piston 4, - - object

the discharge of liquid 19, the remaining n channel 6, in the lower part of the channel 8 and eliminates the formation of a sample of liquid 19 at the exit of the channel 6 and its outflow from the cylindrical body 1. 1 sludge,

five

0

five

0

five

0

application to the surface of the product (not shown) with an overpressure in the cavity 15..

The device for applying the liquid works as follows.

In the nozzle head 5, the cylindrical body 1 is filled with liquid 19, while the floating piston 4 slides over the rod 3 and comes in contact with the body 1, after which the nozzle head 5 is rigidly fixed in the body 1. In the off position, the lower spherical end face 11, the stem 3 is pressed by the spring 14 to the spherical seat in the nozzle nozzle 5 and closes the channel 6. At the beginning of the supply of overpressure (0.15 - 0.2 MPa) through the channel 16, the diaphragm 7 is deformed inside the annular groove 9 and pushes the liquid into the channel. which is in the bottom about When the supply of overpressure continues into the cavity 15, the piston 2 moves upward, compresses the spring 14. and forces air out of the cavity 17 through the channel 18 to the atmosphere. The rod 3, which is rigidly connected to the piston 2, also rises and opens channel 6. The floating piston 4 under the action of the excess pressure descends along the rod 3 and squeezes liquid 19 through the open channel 6 to the surface of the product. After the start of relieving overpressure, the spring 14 under

the action of elastic forces returns the piston 2 with the rod 3 to its original position, the lower spherical end 11 of the rod 3 enters the spherical nozzle 5 and breaks the channel 6. As the overpressure continues to drop, the aperture 7 from the elastic-elastic ma3

The material returns to its initial position, leaves the annular groove 9 in the rod 3, creating a vacuum in the axial channel 8 of the rod 3, which leads to suction of the liquid remaining in channel 6 into the lower part of channel 8. Thus, the formation of a suspension of liquid is eliminated channel 6 and its outlet part are freed from the liquid, which as a result of coagulation can clog it, In the same sequence, the next cycle of delivery of the liquid portion occurs.

The use of the proposed device for applying a liquid improves the quality of the coating by removing the liquid from the outlet of the axial output channel 6 and the outflow of liquid from the cylindrical body 1 between the application operations.

1693

Claims (1)

Formula invented and A fluid applicator comprising a cylindrical body A spring-loaded piston mounted coaxially in the housing, a rod rigidly coupled to it, mounted for movement in the axial bore of the floating piston, and a nozzle with an axial output channel, characterized in that, in order to improve the quality of the coating, it is provided with a diaphragm out. elastic-elastic material and in The axial plug is filled with an axially closed channel in the upper part and on its surface above the floating piston there is an annular groove in which the diaphragm is located, with the stem channel communicated with the groove of the radial hole, the lower end of the stem is spherical, and in the nozzle nozzle there is a spherical socket for the spherical end of the stem.