SU1523928A1 - Apparatus for testing hollow articles for air-tightness - Google Patents

Abstract

The invention relates to the monitoring of the tightness of hollow articles and allows to expand the operational capabilities by providing a leak test both under overpressure and under vacuum. The device contains a tube 2, made in the form of a capillary. The reference vessel 3 communicates with one end of the capillary and the inlet 4, the latter communicating with the second end of the capillary. The container 7 is partially filled with liquid 15 and is connected via valve 13 with a container 3, through pipe 9 with valve 14 to the atmosphere, and through valve 11 to the capillary. The pipe 9 is connected to the evacuation means with the valves 13 and 11 closed, then to the source of liquid. After the tank 7 is partially filled with liquid 15, the valve 14 is closed and the inlet 4 is connected to the product 6, the latter being evacuated. The valves 5, 12, 13 are opened, and after the liquid 15 is degassed, the valve 10 is closed. Then the valves 11, 12, 13 are closed and the tightness of the drop of liquid 15 in the capillary is monitored. 1 hp f-ly, 1 ill.

Description

SP

N3

oo

315

The invention relates to a test apparatus and can be used to check tanks for leaks.

The aim of the invention is to enhance the operational capabilities by providing a leakproofness test as with an overpressure.

its saturation when tested under pressure. The valve 13 is closed. The valve 11 is opened and when a drop of liquid 15 appears in a calibrated capillary (tube 2), the valve 11 is closed. Then the valve 12 is closed and the test start time is recorded. After finishing the test

so with vacuuming with the same Q, the test time and position are fixed

25

thirty

authenticity.

The drawing shows a diagram of a device for testing hollow articles for tightness.

The device contains two parallel, horizontally arranged tubes 1 and 2, one ends of which are connected to the reference capacitance 3, and the others to each other and to the inlet pipe k with the valve 5 connecting the device with the cavity 6 of the product 6 (in this case the tank ) “Tube 2 is designed as a calibrated capillary. There is a vessel “Top”

tank 7 with a liquid connected by a tube 8 with a reference capacity of 3 and, the pipe 9 with the atmosphere. The lower part of the tank 7 is connected by a tube 10, on which a valve 11 is installed with a calibrated capillary. On tube T there is installed valve 12, and tube 13 is mounted on tube 8. Nozzle 9 is equipped with a valve I l. Capacity 7 partially filled with 15o liquid

The device works as follows.

All device valves are closed. Open the valve lA and connect the device 9 with a flexible hose with a vacuum pump. Vacuum the container 7 and close the valve 14. Disconnect the device from the vacuum pump. The nozzle 9 is lowered into the x fluid. And opening the valve I, the required amount of liquid 15 is withdrawn into the tank 7. The device is then connected by the inlet 4 with the test cavity of product 6-, which is pre-evacuated or in which excessive pressure is created. and 12 to create the same vacuum (overpressure) in the test article 6, tank 3, tubes 1, 2, 8 and inlet nozzle 4. After that, slowly open valve 13 to degass the liquid in tank 7 when tested under vacuum or

liquid drops 15 in tube 2, i.e. the tightness of the system being tested is determined. If the liquid droplet 15 remains in place (i.e., does not move), then the product 6 is hermetically sealed.

In case of leakage of the product, 6 drops of LIQUID-15 are moved along a calibrated capillary, the scale of which shows the amount of leakage during the test time.

At the end of the test, the valve 5 is closed and the device is disconnected from the test article 6. The valves are opened, the liquid 15 is drained from the tank 7 and the device is purged with air in order to dry the device’s internal cavity.

The use of the device allows to degas the liquid 15 in the tank.

With a residual pressure, at which the product is checked for tightness under vacuum or under overpressure, a constant pressure is provided over the liquid 15 and in the tube 10, i.e. a drop of liquid 15 is fed into the capillary by its own force t tin, which facilitates the dosing of liquids 15

When tested under vacuum, the liquid 15 is degassed and no boiling is observed during the measurement.

Claims (2)

and splitting the drop, in the case of overpressure, the liquid 15 is saturated with gas, and the measurement in the system does not change. Claim 1 o Device for testing hollow articles for leak tightness, comprising - an inlet valve, a calibrated capillary connected to it at one end, a reference container connected to the other end of the capillary, and a hydraulic valve with a valve, means for creating test pressure, capacity, partly filled with liquid, connected from the side of the liquid to a calibrated capillary, otherwise, with the aim of expanding 40 45 55 Q fixes test time and position five 0 0 liquid drops 15 in tube 2, i.e. the tightness of the system being tested is determined. If the liquid drop 15 remains in place (i.e., does not move), then the product 6 is hermetically sealed. In case of leakage of the product, 6 drops of LIQUID-15 are moved along a calibrated capillary, the scale of which shows the amount of leakage during the test time. At the end of the test, the valve 5 is closed and the device is disconnected from the test article 6. The valves are opened, the liquid 15 is drained from the tank 7 and the device is purged with air in order to dry the device’s internal cavity. The use of the device allows to degas the liquid 15 in the tank. With a residual pressure, at which the product is checked for tightness under vacuum or under overpressure, a constant pressure is provided over the liquid 15 and in the tube 10, i.e. a drop of liquid 15 is fed into the capillary by its own force t tin, which facilitates the dosing of liquids 15 When tested under vacuum, the liquid 15 is degassed and no boiling is observed during the measurement. and splitting the drop, in the case of overpressure, the liquid 15 is saturated with gas, and the measurement in the system does not change. Claim 1 o Device for testing hollow articles for leak tightness, comprising - an inlet valve, a calibrated capillary connected to it at one end, a reference container connected to the other end of the capillary, and a hydraulic valve with a valve, means for creating test pressure, capacity, partially filled with liquid, connected to the side of the liquid with a calibrated capillary, otherwise, with the aim of expanding 0 five five 5.15239286. nor the operational capabilities of the 2. The device according to claim 1, which is designed to ensure hermetic testing in order to increase the productivity of the test both under overpressure and under vacuum with the same reliability under vacuum. the air cavity of the capacitance of the time of refilling the fluid reservoir is communicated with the reference tank, bone, the air cavity of the tank — and the tank connection with the calibrated one is connected through the valve with the agent / capillary through the valve creating the test pressure. ,