SU40032A1 - Viscosity Tester - Google Patents

Description

The present invention relates to instruments for determining the viscosity of molten media from the speed of a load of a certain weight in the test medium.

-The drawing shows a schematic view of the proposed device.

The proposed device is made in the form of a refractory load 5 of a certain weight in the form of a body of a round or cylindrical shape and a tail part, a cylinder (of small diameter) 50-70 mm long. A thread is attached to the upper part of the load behind the eyelet, passed through two blocks 14, secured motionless on the stand. The other end of the yarn 15 is designed to keep the load in the desired position.

On the board 6 fixedly mounted, a stand 10 is mounted with two brackets supporting the copper guide rod 9 bent at the top. In the upper part of the load 5 a clutch is securely attached to which two porcelain guide rings 17 are mounted on the copper wire sliding along the curved copper rod, when the movement of cargo down, and informing the latter directional vertical movement.

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According to the invention, for the purpose of automatically recording the transit time of a certain distance along the load 5, the scale of the device 8 is made of electrically conductive material (copper) and connected to one of the poles of an electric circuit, the other pole of which is connected to a rod 16 connected to a standard during the operation of the device. A recording device consisting of a drum 11 with a clock spring on which the tape is wound and an electromagnet 12 controlling the pressing of a writing device to the above-mentioned drum is also included in the electrical circuit. The device is equipped with a galvanic battery 13, which gives current to the circuit, to the positive pole of which an electromagnet 12 (through clamps 19) with a writing device and a copper scale 8 with divisions, mounted on a plate 7 is attached. To the negative pole - a battery 18 is connected, connected to pin 16 with brass wire.

The device automatically registers the time it takes for a load to pass a certain distance (20–40 mm) in the molten medium by applying a straight line on the tape. By comparison

The lengths of the lines at a certain scale establish the degree of viscosity, and hence the electrical conductivity of the molten medium, which is heated successively to different temperatures.

With the same molten liquids, this method can also determine their specific gravity.

For an explanation of the operation of the instrument, a description is given below of the method for determining viscosity by means of the proposed instrument.

Crucible 1 with the molten test medium is placed on the support 4 so that the lower part of the standard is no higher than 5 mm above the liquid level. Bringing the temperature of the molten medium to the desired value (measured by a thermocouple, not indicated in the drawing), release the valve and the load gets downward. After the lower expanded part of the load is immersed in the medium, the spring rod 16 closes the circuit. The current received from battery 13 drives an electromagnet, and the pin is lowered onto the drum band (before being put into operation) and draws a straight line on it. The circuit remains closed while the spring is sliding on a scale with divisions, after which the spring begins to slide along the board, as a result of which the circuit is opened, the current is interrupted and the line is stopped. The reference is immersed when the shutter ring 15 stops in the link of block 14. The greater the viscosity of the medium, the slower the pattern sinks, i.e., the longer the standard length of the track and the longer the line on the tape is obtained. When the temperature changes, the viscosity of the medium changes, therefore, on the drum tape, different line lengths are obtained, which characterize the electrical conductivity of the medium, which depends, as is known, on the viscosity of the latter.

The unit can also determine the specific weights of various media. However, with the prerequisite they are applied to a homogeneous one.

The proposed technique can be mainly used to 1) determine the viscosity, and hence the electrical conductivity of the molten medium, depending on the temperature change; 2) determining the viscosity of various molten media, and the specific weights of the latter may be different.

In this case, the amendment is not the difference in the weights taken from the tables.

Subject matter

Claims (2)

1. Instrument for determining viscosity, based on the speed of falling rpysi in the test medium, consisting of a load suspended above the test medium on a thrown over the unit and equipped with a counterweight nitn, characterized in that, in order to automatically register the time of passage of the load b of a certain itra “On the way, the scale 8 of the device is made of an electrically conductive substance and is connected to one of the poles of an electrical circuit containing a recording device connected to it, the other pole of which is connected to the associated load rod 16, sliding on the scale when the device is in operation. 2. In the device according to claim 1, using as a recording device a micromagnet 12 controlling the pressing of a writing device to the rotating bar 11.