SU88490A1 - Device for calibrating hydrometric spinners - Google Patents

Description

DEVICE FOR TARIATION OF HYDROMECHANICAL

It was announced on January 2, 1950 for L 411469 in the USSR State Technical University

Known devices and methods for calibrating hydrometric turntables in a pool. with standing water they have a number of drawbacks from the point of view of correctness of reflection of the physical essence of the device operation in a natural watercourse.

Pulling the rotor through the mass of the fluid, where the geometry of the blade and the diameter of the added mass of water form the rotation components, is qualitatively different from the condition of the rotation of the rotation wheel in the natural flow, where the formation of the rotation components depends on the geometry of the blade and on the dynamics of the turbulent

 In the present device, the indicated disadvantages are eliminated by that. That the container of a fixedly mounted hydrometric vane is produced in moving water, using a calibration tube with a pressure chamber for liquid. To install the helicopters in the pipe, it has a removable lid with a coolant.

The fluid flow rate in the pipe is measured by a needle valve installed at the end of the pipe, and to measure the average velocity of the liquid, the pipe is equipped with two inserts and a transparent material through which the indicator (ball) passes automatically.

As a result of the use of this device, calibration calibration is significantly closer to the conditions of operation of the rotor in natural condition. О ° п ™ Gshema device for calibration of hydrometric turntables is shown in the drawing.,.,

The installation consists of a pressure chamber. Tariffing pipelines - Steam basin 3, pump group 4.

The pressure chamber / is designed to maintain a constant pressure in the system, and is an equalizing tank of this system informing it of known stability with changes in the mode. To the bottom of the tank, the pressure pipe from the pump opening into the cavity is quenched, 1 body 6. The damper is designed for

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Ropes

No. 88490 2 -

absorption into |) one:: l-energy of the jet and transfer of the flow into chamber 7 in a quiet state.

The iodine level of the pressure chamber can be measured by a level recorder 8. Which is the sensor of the automatic peryviHTOpa of the mechanism moving the comb spillway.

To maintain the water level in the pressure tank at the desired level, the ridge weir 9 serves, the ridge mark of which can be changed with the help of the screw device 10, and the discharged water is diverted into the pool through the nozzle.

The magnitude of the total vertical movement of the weir ridge is determined by the amplitude of the oscillations of the working pressures at the installation.

Calibration tube 2 starts from the bottom of the pressure chamber and carries the following devices:

valve J2 for disconnecting the pipe from the pressure chamber;

Venturi water meter for measuring the flow rates in the nasr system, corresponding to the expected operating mode of the installation of the pipe, the speed range of tarrozgani, etc .;

removable krypka / - / with appropriate seals and holder for installation); ; turntables on a standard rod and a viewing hole of sufficient size, covered with transparent material;

needle valve / 5 i-: a lower end of the tube to regulate the flow in the tube.

Such a device guarantees the S1K) hydraulic regime in the support system. Needle provides the overlap of the living section of the output end of the pipe ;.

To measure the speed in the pipe when the indicator is two, two BCi-aiiKM from transparent material J6, installed in sections aa and 66, equidistant from the tangent vertical distance and located at a distance LM from each other.

The lock device 17 serves to inject an indicator into the stream, and And a locking device / b to remove the indicator from the stream.

The automatic device, fixing the time of passage of the indicator of the LM section, consists of a clamp (photo cell) 19 and 20, a converter and a receiver 2 / n of the recording device 22.

The tarirovich pipe 2 is laid with a certain inclination towards the lower end, where a crane 23 is installed to completely empty the pipe cavity.

The drainage basin / must have the necessary capacity equal to five times the volume of water in the pressure system of the installation.

The level (working and static) of the pool water must always be lower (the outlet of the needle-clad of the calibration tube. The drainage basin must be accessible for inspection in all its parts and provided with a vent 24 for emptying.

Pump group 4 is designed to transfer water from the drainage basin to the pressure chamber of the installation.

Subject invention

Claims (2)

1. A device for calibrating hydrometrical gauges: is distinguished by the fact that, in order to bring the gauge closer to the working conditions of the tube in a natural flow, it is made in the form of a pipe connected to the pressure; camera 2. The form of the device according to claim 1, characterized in that the pipe, in order to measure the average flow rate of the liquid in it along the passage of the device, is equipped with two inserts of transparent material.