SU1314232A1 - Device for calibrating liquid flowmeters - Google Patents

Description

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The invention relates to equipment for the calibration of flowmeters of various, especially aggressive, toxic and flammable liquids, and can be used in the chemical, petroleum, asHaufiOKHOK engineering industries.

The aim of the invention is to provide automation of the calibration process and work safety.

The drawing shows the scheme of the stand.

Stand: Bijnk) 4.aeT pump 1, heater 2, measuring section of pipeline, with calibrated flow meter 3, receiving tank 4, measuring container 5, liquid collection tank 6, siphons 7 and 8, indicator-weighing devices 9 and 10 emptying of containers, suction 11 and pressure 12 with nozzle 13 pipelines, as well as a calibration device, including a pipe 14 with a shut-off valve 15, connecting the calibration cavity 16 of the measuring tank 5 with a capacity 17 placed on the scale 18.

The receiving container 4 with the siphon generator 7 is suspended on the elastic element of the indicator-weighing device 9 above the measuring container 5, the drain end of the siphon 7 being released through the bottom of the container 4 into the container 5 and not touching it.

The measuring container 5 is likewise suspended on the elastic element of the indicator-weighing device 10, and the emptying siphon 8 fixed in it is released through the bottom of the container 5 into the tank 6.

Compiled by B. Biryukov Editor N. Shvydka Tehred V. Kadar CorrectorE.Roshko

Order 2205/44 Circulation 694 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

42322

The receiving 4 and measuring 5 containers are open at the top and placed in the cavity of the tank 6..

As devices 9 and 10, the force meters with electric or pneumatic output signal are used.

The stand works as follows. Pump 1 provides continuous

0 flow through the reservoir 6 - suction pipe 11 - heat exchanger 2 - graduated flow meter 3 - pressure pipe 12 - nozzles 13 - receiving tank 4.

5 From the receiving tank 4, the liquid through the siphon-generator 7 pulses into the measuring tank 5, which is periodically emptied into the tank 6 by means of the siphon 8. When

This time interval between two adjacent emptyings of the measuring tank 5 is much longer than the period of the pulsed emptying of the receiving tank 4. Each pulse is recorded by a force-measuring device 9, which can also serve to control the mass of the fluid in the pulse and, when connected to a time counter, the formation of the boundaries of the period of the pulse.

0 The device 10 serves to form the boundaries of the time interval for averaging the flow rate, controlling the mass of the fluid that has merged over this interval, and also for calibrating the pulse by

5 mass.

Thus, a self-oscillating discrete-pulsed flow regime with a pulse frequency proportional to the flow arises in the hydraulic circuit of the stand.

Claims (1)

A STAND FOR GRADING LIQUID FLOW METERS, comprising a pump, a heater, a measuring section with a graduated flow meter, a measuring tank placed on an indicator-weighing device, and a liquid collection tank, which is different in that, p. In order to ensure automation of the calibration process and the safety of work, a receiving tank, a siphon generator, an emptying siphon, a second indicator and weighing device are additionally introduced into it, while the siphon generator is fixed in the receiving room, and the emptying siphon is in a measuring tank, each installed on an indicator-balance device and are located one above the other inside the liquid collection tank so that the drain ends of the siphon generator and the drain siphon are freely located respectively in the measuring tank and the failure tank RA liquid. 1 13142