SU112696A1 - A device for determining the thermal conductivity of shoes - Google Patents

Description

The subject of the invention is a device for determining the thermal conductivity of a shoe. There are no such devices in the industry. The proposed device consists of a rubber hollow pad worn on shoes, having a stopper with an agitator, a thermometer and a heater for water poured into the pad in the upper part, and a stocking worn on the pad, equipped with thermocouples included in the circuit of conventional electrical measuring devices.

Pa figs. 1 shows a hollow rubber block with stocking and instruments; in fig. 2 is a diagram of the assembled device for determining the thermal conductivity of the shoe.

The device consists of a hollow rubber pad 1, closing it in the upper part with a stopper 2 made of pure rubber. Through the stopper 2 niiyipb co .-; slki / n; -peed1 thermometer 3 for oni) e; io. ; cM icpa: vp of water inside the pad, heater 4 and agitator 5. On top of the pad there is a stocking 6 of cotton fabric and thermocouples attached to it. To determine the thermal conductivity of footwear, there are measuring devices: a mirror galvanometer 7, a low power transformer 8 for powering a galvanometer 7 light bulb, a laboratory instrument LATR -2 9 for controlling the voltage in the heater circuit 4, a voltmeter 10, an ammeter P and a heat meter 12. Thermocouples 13 are fixed on the stocking 6 in any places where it is desirable to determine the thermal conductivity of the shoe. For different types of shoes, various rubber pads 1 and stockings 6 are used.

Determination of the thermal conductivity of shoes on the device is made as follows.

For the shoe in question, a suitable hollow rubber pad is selected / and stockings 6 with thermocouples are put on it 13. After that, the rubber pad is inserted into the shoe, filled with water to the entire height of the shoe, and the top of the shoe is closed /

stopper 2, into which thermometer 3 is pre-inserted, passes the glass rod of agitator 5 and heater wire 4. One end of the wire from heater 4 is connected to the LATR-2 terminals ("to the heater) and the second to the ammeter //, located in the upper part of the heat meter panel 12 and from them to LATR-2, and from the terminals LATR-2 to the socket 14 of the power grid.

To determine the temperatures inside the shoe, a mirror galvanic meter 7 is connected to the heat meter. One end of the wire from the mirror galvanometer 7 is adhered to the terminal located at the bottom of the heat meter 12 and the other end to the terminal of the thermocouple at the point where the temperature is determined.

The mirror galvanometer 7 is fixed on the main wall in such a way that the paper tape 15 with applied divisions is fixed below the galvanometer and with the calculation of a clear, moving mobile spot.

Then the heater 4 is turned on through LATP-2 and the water in the rubber pad is heated to the required temperature, after which the voltage and amperage at which the temperature of the water in the rubber pad will remain through LATR-2 will remain unchanged . This will absorb the heat consumed through the shoes. The voltage in volts and the amperage at which the temperature of the water after stirring it with the stirrer 5 remains constant, the heat loss through the test footwear into the surrounding space is determined by the formula Joel Lsppa Q 0.864 UtI kcal-, where U is the voltage in the heater circuit in volts, I - amperage, c. amperes and / - time in hours.

Subject invention

Surf) for determining the heat-dissipated footwear, characterized in that it consists of a rubber hollow pad that is worn on the shoes, has a plug in the upper part with a stirrer, a thermometer and a heater for poured water into the block, and a stocking fitted on the pad with a thermocouple connected to the circuit conventional electrical measuring instruments.