SU1610355A1 - Apparatus for checking hermetic sealing of hollow articles - Google Patents

Abstract

The invention relates to the testing of the tightness of hollow articles and makes it possible to increase the reliability when inspecting products with large leaks. The device contains a vacuum pump with a pipeline, installed on it successively safety and shut-off valves. Two vacuum gauge sensors are connected to the pipeline, which are tuned to two extreme levels. The power supply plus is connected via the contact of the first sensor to the control input of the shut-off valve directly and via the first electromagnetic relay to the control input of the electronic stopwatch. The contacts of the second sensor are connected to the first contacts of the first relay and in parallel with the contacts of the first sensor are connected to the positive power source. The minus of the latter is connected to one plate of a capacitor, the second plate of which is connected via the second contacts of the second relay or with the power supply source, or via the second relay to the second control input of the electronic stopwatch. An extreme vacuum is created in the product, the contacts of both pressure sensors are closed, the stopwatch is turned on, and the capacitor starts charging. When the vacuum drops, the pressure sensor triggers to limit the vacuum deterioration, the capacitor discharges to a second relay, which stops the stopwatch, according to which the degree of leakage of the product is determined. 1 hp ff, 1 ill.

Description

The invention relates to a testing technique and can be used to check the tightness of large-sized products.

The purpose of the invention is to increase the reliability in the control of products with large leaks.

The drawing shows a diagram of the device for monitoring the tightness of hollow products.

The device contains a vacuum pump 1 connected to the product 2 through a flexible pipe 3, in which a safety valve 4 regulated by a vacuum of 0.4 kgf / cm and a solenoid 5 controlled by a solenoid 5 are installed in series. The gate valve 6 is connected to a vacuum 3 0.3 kgf / cm dilution sensor 7 and configured to operate at a vacuum O, 1 kgf / cm the second sensor 8. Plus 16 power source 9 (not shown) is connected in series with the electrical contact 13 of the vacuum sensor 7 romagnitom 5 zaporno35

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The first valve 6, the signal lamp 1 and the first electromagnetic relay 11, the first contacts 12 of the relay 11 serve to block the contacts 13 of the vacuum sensor 7, the second contacts 14 connect the capacitor 15 to the plus 16 of the power supply, the third contacts 17 I of the relay 11 connect the first control The input of the electronic stopwatch 18 with the contacts 13 of the sensor 7. The contacts 19 are controlled by the second sensor 8 of the vacuum and serve to block the contacts 13 of the sensor 7. The contacts 20 second of the electromagnetic relay 21 connected through the contacts 14 to the capacitor 15 are connected to the second input stopwatch 18 and serves to stop an electronic stopwatch 18. Contact 22 is used for connecting source mine sa DC voltage of 24 V. 19.i Contacts 12 are connected in parallel with the relay contacts 11

13. - . :

The device works as follows.

When the vacuum pump 1 is turned on via line 3, pumping air from product 2 starts. When the vacuum reaches 0 kgf / cm, the vacuum sensor 8 will work and close contacts 19. When the vacuum pressure reaches 0.3 kgf / cm, the vacuum sensor 7 will work and The contact 13 is closed, as a result of which the electromagnet 5, the electromagnetic relay 11, the warning light 10 will be connected to the current source, the shut-off valve 6 will work, the contacts 12 of the relay 11 will block the contacts 13 of the vacuum sensor 7

No, the contacts 14 of the relay 11 will connect the capacitor 15 to the current source, and the contacts 17 of the relay 11 will start an electronic stopwatch 18. The air intake from the product 2 stops, the safety valve 4 is triggered, preventing any problems in the continued operation of the vacuum pump 1. Through The slit outside air will get inside the product 2 the faster, the worse it is sealed. As soon as the vacuum inside the product 2 becomes equal to 0.1 kgf / cm, the vacuum sensor 8 will work, its contacts 19 will unlock the power supply circuit of the relay 11 and electromagnet 5, the shut-off valve 6 will open and the safety valve 4 will close and the vacuum pump

1 will again pump air from the body of the product. 2

When the relay 11 is de-energized, the contacts 14 are switched, the capacitor 15 is discharged to the winding of the relay 21, which turns on for 0.5 s and with its contacts 20 it stops the electronic stopwatch 18, and its digital indicators will display the time during which the vacuum has decreased 0.3 to 0.1 kgf / cm. The longer this time, the better the product 2 is sealed.

The proposed device can be used for measurements and when the vacuum is produced by the engine of the product, for this it is necessary to disconnect the pipe 3 from the vacuum pump 1 and close it with a stopper.

The device allows to speed up the production of works, to improve their quality. At the same time, the engine resource of the product is saved and a significant amount of fuel is saved.

Claims (2)

1. A device for monitoring the tightness of hollow products, containing a vacuum pump with a pipeline to be connected to the product cavity, a power source, a check valve installed in the pipeline, the first vacuum gauge, the contact contact of which is connected to the control input of the stop valve, an electronic A stopwatch, the first control input of which is connected via the first electromagnetic relay to the control contact of the first vacuum gauge, characterized in that, in order to increase the reliability when the control unit has 5 large LIs with large leaks, it is equipped with a second electromagnetic relay, a second vacuum gauge, the trigger threshold of which is higher than that of the first sensor, the control contact of the second sensor and the first contact of the first relay are connected to an electrical circuit connected in parallel to the control contact the first vacuum gauge with a positive power supply source, a capacitor, one plate of which is connected to the power supply minus and the other through a second contact of the first relay to the plus of the power supply or control input second relay. i6103556 the output of which is connected to the second control input of the electronic sec-safety valve, the meter. The second is on the pipeline between the pump 2..The device according to claim 1, about tl i - shut-off valve. - --y- xj.eij-j, that it supplies