SU85918A1 - Scales for determining the weight loss of a material to be weighed. - Google Patents

Description

Weights are available to determine the weight loss of the Material to be suspended, made in the form of a rocker arm for the material to be weighed, balanced by a filled liquid vessel with a Tpo MarHHTnbijM valve for the release of fluid acting from the rocker arm contacts.

Lever scales are known in which the material to be weighed is balanced by liquid.

 Weight metering devices are known that are equipped for a liquid with a closable solenoid valve for its release.

Weighing dispensers are also known that are equipped with a liquid pressure switch with an electric contact closable valve for releasing it.

However, the known designs of the scales possess a under-ratio, which does not provide the possibility of determining the weight of the material being weighed at high temperatures of the latter.

A distinctive feature of the described scales for eliminating the weight loss of a material to be weighed is that a U-shaped graduated tube for collecting liquid is used to determine the weight loss of the material being weighed by the amount of liquid that has leaked from the balance vessel. With relative simplicity of the device, these scales provide the ability to determine the weight loss of the material being weighed, for example, when testing ceramic masses at high temperatures.

The drawing schematically shows a weighing device for automatically determining the weight loss of a weighed material.

When the weight of the test specimen I is lost, the right shoulder 2 of the balance beam is lowered and closes an electrical circuit with contacts 3 and 4

No. 85918

the supply magnet 5 and the Warren 6 synchronous motor connected to the rev counter graduated in weight units, as a result of which the needle 7 draws its base to the electromagnet bore and opens the valve 8. In connection with this interaction of the rocker arm with the electromagnet from the counterbalancing vessel 9, the liquid filled through the valve 8 leaks a part of the liquid, equal to the weight lost of the test specimen until the balance of the arms of the rocker arm and the open circuit. Thus, the determination of the amount of fluid flowing out of the balancing vessel is made according to the closing time of the weights.

When the circuit is opened, the spring 10 presses the needle 7, helping to close the valve 8.

To determine the weight of the material to be weighed by the amount of liquid spilled from the balance vessel, a U-shaped graduated tube 11 is used to collect the outflowing liquid.

To measure the amount of liquid, such as mercury in a U-shaped tube, a photo registration method of Kurpakov was applied, based on a change in the resistance of the conductor 12 immersed in the measured liquid.

Weight loss recording can also be performed visually using a graduated scale of 13 by lifting a liquid column, mercury in a U-shaped tube.

The subject of the invention 1. Scales for determining the weight loss of a material to be weighed, made in the form of rocker arms for the material to be weighed and a balancing vessel filled with liquid and equipped with a solenoid valve for discharging a liquid closed by the rocker arms, characterized in that to determine the weight loss of the material to be weighed by the amount of leaked fluid from the balance vessel applied U-shaped graduated tube for collecting fluid.

2. The form of the balance according to claim 1, characterized in that the Kurnakov method, based on a change in the resistance of the conductor immersed in the measured liquid, is used to measure the amount of liquid, such as mercury in a U-shaped tube.

3. Weights according to claim 1, characterized in that the determination of the amount of liquid that has flowed out of the balancing vessel is produced according to the closing time of the contacts of the scales, for which a synchronous electric motor, for example, Warren, connected by a counter of revolutions graded in weight units, is attached to the contacts of the scales. .