SU1465723A1 - Device for measuring heat quantity - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure the amount of heat in heat supply systems of residential and industrial buildings and structures. The purpose of the invention is to improve measurement accuracy and reliability. The device contains measuring instruments for the quantity of the coolant of the feed and return flows with pulse converters, resistance thermal converters, bridge measuring circuits, a pulse generator, and pulse shapers. In addition, the device includes a stable current source, keys, a voltage converter — a frequency, a counter, a decoder, and an indicator. The number of pulses summed in the meter is proportional to the amount of heat released from the boiler to the heating network. 1 il. with (L

Description

one

The invention relates to a measurement technique, namely, devices for measuring the amount of heat, and can be used in automata: - heat supply systems for residential and industrial buildings and facilities for recording and controlling the amount of heat.

The purpose of the invention is to improve measurement accuracy and reliability.

The drawing shows a block diagram of the device.

The device contains meters L and 2 heat carrier quantities installed in the make-up and return pipelines, with pulse converters 3 and 4, thermal converter 5 resistance installed in the hydraulic pipeline, resistance thermoconverter 6 installed in the return pipeline, thermal converters 7 and 8 installed in the supply pipeline, bridge measuring circuits 9 and 10, while in the shoulders of the bridge circuit 9 there are included thermocouples 5 7 resistance, and in the shoulders of the bridge circuit hemes 10 - resistance thermal converters 6 and 8, a pulse generator 11, the outputs of which are connected to the first inputs of drivers 12 and 13 pulses, the second inputs of which are connected to the outputs of pulse converters 3 and 4, respectively, stable current sources 14 connected to the first inputs of keys 15 and 16, the second inputs of which are connected to the outputs of the drivers

13 and 12 pulses respectively, two-input voltage converter 17 is the frequency, the inputs of which are connected to the outputs of the keys 15 and 16, and the output to the binary-decimal counter 18, remote 19, the input of which is connected to the output of the counter 18, and | output - to indicator 20, I The device operates as follows.

With the passage of a unit amount of coolant through the meter 1 of the amount of coolant, the pulse converter 3 generates a voltage pulse that is fed to the driver 12 pulses, where it is connected to one of the sequences of mismatched pulses fed to the driver 12 from the generator P.

The impulse from the imaging unit 12 is supplied to the key 16, while the source 14 of a stable current is connected to the bridge circuit 9, which includes tertiary 1465723

key 15. In this case, the source 14 of a stable current is connected to the bridge circuit 10, which includes

g thermocouples 6 and 8, the voltage proportional to the temperature difference between the heating medium in the supply and return pipelines, comes from the code of the bridge circuit 10 to the voltage converter 17 — the frequency at the output of which pulses are formed with a frequency proportional to the temperature difference of the heat carrier in supply and return pipelines.

15 These pulses arrive at the counter 18. By decreasing the clock pulse at the output of the pulse generator 13, the bridge 10 is disconnected from the current source 14 by means of the switch 15 and the supply of pulses to the counter input stops. The number of pulses summed in the counter 18 is proportional to the product of the coolant , protermoconverter 5, installed 25 that went through the return pipeline,

and temperature differences in supply and return pipelines.

The total number of pulses recorded by the counter 18 is proportional to the amount of heat released from the boiler to the heating network:

NP (T, - T.,) (T, - T3) dV3,

where t ,, t,

in the make-up pipeline, and the thermoconverter 7, installed in the supply pipe.

The voltage proportional to the temperature difference of the coolant in the supply and make-up pipelines is posted to the input of the converter 17, the voltage is the frequency at the output of which pulses are formed, the frequency of which is proportional to the temperature difference of the coolant in the supply and make-up pipelines. These pulses are fed to the counter 18.

As the clock pulse declines on the | during the driver of the 12 pulses, the bridge 9 uses the key 16 from the switch from the stable current source 14 and the flow of pulses to the counter 18 stops. Thus, the number of pulses sushirovye 3 | counter 18, is proportional to the production; bodies passed through the feed pipe and temperature differences in the feed and feed pipelines.

With the passage of a unit amount of coolant through the meter 2, the pulse converter 4 generates a voltage pulse that advances onto the driver of 13 pulses, where it is attached to the second sequence of mismatched pulses from the generator 11. The pulse from the generator 13 enters

35

and

Te 40

45

50

55

the temperature of the water, respectively, in the supply, return and feed pipelines;

.dV |, idV HdVj- coolant flow, respectively, in the supply, return and make-up pipelines, with / 3V, DU / g + Vj. The sensor 18 performs the function of the integrator, and the result accumulated in it through the decoder 19 enters the indicator 20.

Claims (1)

Invention Formula A device for measuring the amount of heat containing a first heat meter with a pulse converter installed in the return pipe, a second heat meter with a pulse converter. where t ,, t, five and Te 0 five 0 five the temperature of the water, respectively, in the supply, return and feed pipelines; .dV |, idV HdVj- coolant flow, respectively, in the supply, return and make-up pipelines, with / 3V, DU / g + Vj. The sensor 18 performs the function of the integrator, and the result accumulated in it through the decoder 19 enters the indicator 20. Invention Formula A device for measuring the amount of heat containing a first heat meter with a pulse converter installed in the return pipe, a second heat meter with a pulse converter.