SU50214A1 - Instrument for measuring pressurized fluid - Google Patents

Description

Instruments are known for measuring pressurized liquids whose accuracy and reliability depend both on the system of the instruments themselves and on the properties of the liquid.

The measuring instruments for liquids of the Kennedy system, Fraje et al., Give excellent results when measuring purified and filtered liquids; however, they are of little use for measuring crude liquids, since they give a significant error. The same is observed when using disk water meters of various systems, for example. „Cosmos,„ Star and others.

Turbine-type water meters; Record, Pete, Turbine, etc., in view of the low sensitivity of their mechanisms, are also of little use for measuring unpurified liquids.

The disadvantages of these meters, including those with the Voltman spinner, are that they all work under the pressure present in the pipeline, why they perceive vibrations accordingly and react to it. Equally, their work reflects the temperature of the measured

fluid. Fluctuations in head and temperature variation have a detrimental effect on the mechanism, and at the same time on the measurement accuracy. In the device according to the invention, a measuring bucket, dual and tiltable by the weight of the liquid, is used, which is a closed one. into the hermetic chamber connected to the fluid line network.

The novelty of such a meter lies in the fact that in order to measure the liquid after pouring it from the bucket experienced the same pressure under which it was applied to the measurement, the receiving chamber of the measured liquid communicated with the pressure source, and the system described in p. . 2 and 3 of the subject invention.

FIG. 1 shows a longitudinal section of the device; FIG. 2 is the same, but in a different projection; FIG. 3-scheme of installation of the device; FIG. 4-modification of the device in longitudinal section; FIG. 5 is the same, but in a different plane, and FIG. b-view from above.

According to FIG. 1 drawing, the device is installed below the horizon of the liquid in the pressure tank 7. Measuring

chamber 2 of the device through a pipe 5, closed with a valve - is connected to the lower part of a tank filled with liquid /. Through pipe 5, closed valve 6, the chamber 2 is communicated with the top filled with compressed air, part of the tank /. The measured liquid through pipe 7 with valve 8 is discharged from chamber 2 to its intended purpose.

When valves 6 and 6 are closed and valve 4 is open, liquid from tank 7 through pipe 3 through valve 9 and through pipe W enters the tilting measuring bucket //. The latter is fixed pivotally on axis 12. The fluid, filling one of the bucket halves, overturns it with its weight and pours into chamber 2. At the same time, the second half of the bucket fits under the tube 10 and after filling with fluid it is emptied the same way.

Thus, chamber 2 is filled with measured doses of fluid until the hollow cylinder 13, floating up by means of transmission levers 14 and 15, closes valve 9. After filling the bottom of chamber 2 with liquid, valves 6 and 5 open and chamber 2 communicates with the air space of the tank. / and the discharge pipe 7, as a result of which the liquid in chamber 2 will be forced out into the pipe 7, experiencing the pressure under which it was supplied to the measurement.

With the loss of fluid from the chamber 2, the hollow cylinder 13 lowers and, by using the levers 14 and / 5, opens the valve 9 for a new flow of fluid into the measuring bucket 77 and into the chamber 2. The bucket 77 is of a certain volume.

The bucket axis 72 is passed through the wall of chamber 2, and its free end 16 is articulated by a system of levers 77, 18 and 19 (Fig. 1) with a counter 20. The latter registers the number of bucket tipping over 77. By the number of bucket tipping and its capacity, fluid device.

Adjusting the tilt of the bucket 77 is achieved with set screws 27.

The device works automatically.

The above refers to the installation of the instrument during pneumatic conveying.

fluid and when installing it in close proximity to the pressure tank 1.

In the case of installation of the device at a considerable distance from the pressure tank, the air is supplied to chamber 2 through a special pipe connected to the air space of the pressure tank to which the pipe 5 is connected.

In the diagram of FIG. 3, a plunger 23 is installed on the liquid permeable pipe 22, through which air released from the liquid enters the air cap 24.

The liquid to be measured from the main pipeline 22 is directed through pipes 3 to the chamber 2 of the meter installed below the main pipeline 22, and the compressed air from the air cap 24 through the pipes 5 is directed to the measuring chamber 2 of the same device.

The modified fluid measurement device (Figs. 4, 5 and 6) is installed on a horizontal pipe between valves 25 and 26. To charge it with air, with the valve 26 closed and valve 27 closed (Fig 5), the valve 25 is opened, through which the liquid under the pressure present in the network enters the bypass charging chamber 28 and through the open feed valve P through the drain tube 10 is poured into a two-sided measuring bucket 7 /, which is fortified pivotally.

The fluid, after it has filled the right half of the bucket 77, will tip it over and pour into chamber 2. At the same time, the left half of the bucket 77 will be brought under the drain tube 10 (the position is shown by a dotted line). This half, when filled with liquid, also overturns and brings the right half of the bucket 77 under filling. In this way, chamber 2 is hermetically sealed with liquid until the float 13 pops up, closing the feed valve 9 by means of levers 14, 15. The liquid entering chamber 2 will produce pressure on the air inside it, which will be compressed by a certain amount.

After closing valve 9 fluid

will fill the chamber 28 and force air out of it until the floating ball 29 closes the openings 30. The designated opening connects the chamber 28 to the air cap 31. With the closing of the opening 30, the flow of liquid into the chamber 28 will stop. The air displaced from the chamber 28 through the cap 3 / and the valve 32 through the air passage tube 5 (Fig. 5) will move into the chamber 2 and will create pressure in the latter.

Having determined by filling the water-glass 32 (Fig. 4) the filling of the chamber 28 with liquid, the valve 25 is closed and the valve 33 is opened (Fig. 4), through which the liquid from the chamber 28 is poured out. Upon release from the fluid of chamber 28, the remaining air in it, as well as the air filling cap 31, will expand to its original volume. However, since the volume of chamber 28 is significantly larger than the volume of air remaining in it and in the cap 31, the expanded air will only occupy part of chamber 28. It is completely necessary for filling chamber 28 that air enters it from outside through valve 34. Compressed air from chamber 2 can not go into cap 57 due to an obstacle created by valve 32.

Emptying the chamber 28 from the liquid and closing the valve 33, it is necessary to reopen the valve 25. As a result, the chamber 28 is filled with liquid to failure and, thereby, the air elasticity in the chamber 2 increases.

The techniques are repeated successively until the elasticity of the air in the chamber 2, the air inlet tube 5 and the cap 31 reaches the pressure that is in the network. The equality of pressures is determined by the fact that when the valve 25 is open, no liquid will enter the chamber 28.

After that, open the valve 27 (Fig. 5). directly connecting the cap. / with chamber 2, and releasing excess air through valve 34 until the water level in chamber 28 occupies half the height of glass 32 (Fig. 4). Then open the valve 26 and the meter will act as follows. The compressed air in the upper part of chamber 2, due to its elasticity, displaces the liquid from chamber 2 through valve 26 into the feed pipe, which results in lowering the level of liquid in chamber 2, and at the same time lowering the float 75. Float 75 by means of articulated with it, the levers J4, / 5 will open the feed valve 9. The fluid from chamber 28 through tube 70 will pour into measuring bucket 77. The latter, tipping over the filling, will replenish the amount of fluid in chamber 2. It should be noted that the pressure in chambers 28 and 2 will be the same with se pressure These, and the slight fluctuations in head pressure B of the network will be compensated by the air filling part of the chambers 28 and 2, as observed in a conventional air cap used in pumping stations.

Thus, all the liquid flowing through the valve 26 is passed through a two-sided measuring bucket / 7 of a certain volume. The bucket axis 12 at one end is passed through the wall of chamber 2. The outgoing part of the end 16 (Fig. 5) is coupled with a system of levers 77, 75 and 79, which actuate the rev counter 20. This counter registers the number of bumps tipping 77. By the number of tiltings multiplied by the volume of the bucket, the amount of fluid m passed through the device is determined.

The installation of the bucket 77 is adjusted by screws 27.

During prolonged operation of the device, two positions can occur:

1. With a significant decrease in pressure in the network, the air can fill the entire volume of chamber 28, and then the liquid will not have access to it. In this case, it is necessary to release excess air from chamber 28 by opening valve 34.

2. With a significant increase in the pressure in the network, chamber 28 may be filled to the full with liquid, and the remaining air in cap 57 and chamber 2 will not have sufficient counter-pressure necessary to displace fluid from chamber 2 through flow valve 26. In this position, it is necessary to make an additional charge of the chamber 2 with air by emptying the chamber 28. Charging the device with air can

to be carried out by means of a conventional hand-held air pump used to fill the pneumatic tires of automobiles, with the pump hose attached to the lower valve port 34. The device is intended mainly to account for fuel consumption in factories, airfields, in MTS, garages.

The subject matter of the invention.

Claims (3)

1. An instrument for measuring a fluid flowing through a pipeline under pressure, consisting of a sealed enclosure connected to a fluid line with a bucket meter enclosed in it, tilted by the weight of the fluid flowing through a valve that automatically closes when the measured liquid reaches a predetermined level in the chamber, characterized by that, in order to maintain the pressure under which the fluid was flowing, and for the fluid already measured by the tilting bucket, the chamber 2 communicates with the air duct 5 with the source The pressure at which fluid flows for measuring. 2. Modification of the apparatus according to claim 1, characterized in that, for the same purpose as in claim 1, an air cap 57 is used, connected by an air passage tube 5 to a meter chamber and a chamber 28 communicating periodically with this cap, The chamber serves as a bypass link between the inlet pipe and the measuring bucket together with an air cap designed to charge chamber 2 with compressed air to a pressure under which the fluid flows into chamber 28. 3. The form of the instrument according to claim 2, characterized in that for producing the chamber meter with compressed air, the air passage tube 5 is equipped with two valves, of which valve 32 is intended to pass air into chamber 2 from chamber 28 when filled with the last liquid and the second valve 34 serves to suck the outside air into the chamber 28 when it is emptied during the charging process. to the author's testimony of N. Ya. Pankratov No. 50214 / J 0 SZIG.1 to the author's testimony of N. Ya. Pankratov . J / fig.B -.27 No. 50214