SU609068A1 - Heat meter - Google Patents

Description

(54) HEAT

dah, but the magnets 13 are located along the edges of the equal-arm rocker 14 rotating on the axis 15. The spiral arms 16 and the link 17 of the transmission mechanism connected to the stem 4 of the friction mechanism, similar to the mechanism in FIG. 1. The material from which the clips 10 are made has a linear dependence of the magnetic permeability on temperature.

The heat meter works as follows.

The flow meter 1 rotates the disk 2 and the roller 3 associated with it at a speed proportional to the flow rate of the coolant. The position of the roller 3 relative to the center of the disk 2 depends on the difference in the forces developed by thermomagnetic sensing elements connected to the circular pipes of the direct and reverse pipelines. Since the stroke of the thermomagnetic sensing element is proportional to the temperature of the coolant washing the shroud 10, as a result of the interaction of two sensitive elements, the position of the roller 3 will depend on the temperature difference of the coolant. Thus, the readings of counter 7, associated with both roller 3 and disk 2, will be proportional to the product of the flow rate of the coolant and the temperature difference between the coolant in the forward and reverse heat lines, i.e. the amount of heat flowing through the main line. The movement of the rod 4 of the most sensitive element is the result of the interaction of two forces: the force of compression of the spring 9 and the force of attraction of the magnet and to the holder 10. As a result of the heat carrier passing through the circulation pipe having a particular temperature, there is a partial loss of the magnetic properties of the thermomagnetic holder 10 As a result, the magnet pull force is weakened and the rod 4 is pushed under the force of the spring force. The rod moves the roller 3, which interacts with the counter 7 by means of the pinion 5. When the coolant temperature decreases, the magnetic properties of the material of the cage are restored, the magnetic force increases, and the 8 magnet is drawn into the cage gap, stretching the spring 9. The rod moves in the opposite direction. The device is adjusted so that when the temperature difference between the direct and reverse heat lines is zero, roller 3 is located in the center of the horizontal disk.

The position of the rocker arm 14 of the heat meter with the thermomagnetic link of the rotating type (Fig. 2) also depends on two forces: the force of attraction of the right magnet to the right holder and the force of attraction of the left magnet to the left holder. Since the magnets 13 are located on different arms of the rocker 14, the resulting movement of the link 17 pivotally fastened to the rocker will be proportional to the difference in forces between the right and left thermomagnetic elements. Moving rocker with partial loss of magnetic

properties of the clips 10 occurs under the action of a pair of spiral springs 16, and the return of the rocker arms to the initial state - under the action of the forces of attraction of the magnets to the clips, which restored magnetic properties. Setting the zero position of the roller 3 is performed in the same way as the adjustment of the heat meter of FIG. 1. The use of a thermomagnetic link unit allows to increase the measurement accuracy, since serial thermomagnetic materials (TCM series) have a linearity of the magnetic characteristics of a normal 0.1%. Serial thermometers (for example, type TS-1) have

in the range of temperature differences of 20-100 ° C (without taking into account the error of the water meter), the main error is 4%.

The dimensions of the proposed heat meter are smaller compared with the prototype, since the thermomagnetic pulling link has an increased stroke and gain compared with the expansion thermometer and is more compact. In addition, the use of a forward driving link makes it unnecessary

the transfer device, as the link directly acts on the moving roller. The absence of a transfer device simplifies the design, increasing the reliability of the device.

Claims (3)

1. A heat meter containing a flow meter, a temperature differential sensor in the heat carrier forward and reverse piping and a multiplying mechanism in the form of a frontal friction gear containing a disk mounted on the axis of the flow meter and a friction roller moving along a disk associated with a meter and a temperature difference sensor, characterized in that, in order to simplify the design, to reduce the dimensions and to improve the accuracy of measurements, the temperature difference sensor is made in the form of a differential thermo-magnetic traction link, containing sleeves of a thermomagnetic material, mounted on a direct and return duct Odes and permanent magnets placed in the gaps of the clips and connected by means of a transmission mechanism with a friction roller. 2. A heat meter according to claim 1, characterized in that the transmission mechanism is made in the form of a translationally moving rod, spring return spring. 3. Teplomer on n. 1, characterized in that the transmission mechanism is designed as a rotating rocker, spring-loaded with a return spring. Information sources, taken into account in the examination 1. USSR author's certificate No. 347597, cl. G 01 K 17/12, 1970. 2. USSR author's certificate №85504, cl. G 01 K 17/14, 1951.