Level transmitter for liquids

 

(57) Abstract:

The invention relates to the instrument and can be used in systems of control, management and control of industrial processes, in particular, to measure the level of oil in tank containers tank farms. The inventive sensor includes a measuring pulley, float associated with the pulley steel tape, a balancing mechanism in the form of a spring constant torque and ballast, in the form of goods of a given mass, suspended coaxially with the float on the flexible organs that are attached to the ballast wheels mounted on the axle, provided with a locking mechanism. 1 Il.

The invention relates to the instrument and can be used in systems of control, management and control of industrial processes, in particular, to measure the level of oil in tank containers tank farms.

Known level transmitter for liquids containing float sensitive element located in the guide and float ballast [1]

The disadvantage of this sensor is the lack of PR is esta.

Closest to the invention is a transmitter for liquids containing a measuring pulley, float associated with the pulley steel tape and mounted in the guides, with which it is connected by ferromagnetic eyes, the balancing mechanism in the form of a spring constant torque and ballast in the form of permanent magnets mounted for movement on rails [2]

A disadvantage of the known sensor is driven by the need for reconfiguring the mass of the float to lower it to the bottom of the tank, the height of which can be up to ten meters or more, which reduces the efficiency of determining the quantity of oil.

The objective of the invention to increase the efficiency of determining the quantity of the controlled fluid.

The solution lies in the fact that the level transmitter for liquids containing a measuring pulley, float associated with the pulley steel tape, a balancing mechanism in the form of a spring constant torque, and the ballast, the latter is in the form of goods of a given mass, suspended coaxially with the float on the flexible organs that are attached to the ballast wheels mounted on the axle, provided with a locking mechanism.

In the drawing image is RIT building 2, hosts dimensional pulley 3, the balancing mechanism in the form of a spring 4 constant torque, ballast wheels 5 and 6, mounted on a common axis 7, and the locking mechanism 8. The float 9, having a negative buoyancy associated with the pulley 3 steel tape 10 with 11 divisions. On ballast wheels 5, 6) are fixed flexible bodies (cables) 12 and 13, on which is suspended ballast, made in the form of cargo 14 with a given mass. Readings measured level is read through a window 15 in the housing 2.

The device operates as follows.

In the initial state (when measuring the level of H1) float 9 is located at the interface of the oil with air. At a constant level of H1the buoyancy force on the float 9, and its weight is compensated by the force of the spring 4, the torque which is transmitted to a measuring pulley 3, and the whole system is in equilibrium. When changing the level of H1the equilibrium is disturbed and the float 9 by increasing or decreasing the buoyancy force is moved up or down to the equilibrium state, i.e., duplicates of change of the controlled level H1oil in the tank 1.

For level measurement of H2produced water p is the weakening effects of the stopper mechanism 8 on the axis 7, where is the ballast wheel 5 and 6 attached to them flexible bodies 12 and 13. The load 14, which is suspended on flexible bodies 12 and 13, is lowered under its own weight on the float 9, changing its weight.

The change in mass of the float 9 to the preset value provides the conditions for the aspirations of the entire system to equilibrium at the interface of oil and water (see drawing). After equilibrium is the reference level H2produced water, which is used to determine the net amount of oil in the tank 1.

After the reference level H2the sensor is again switched to the constant control of the upper level H1why, the rotating axis 7, raise the load 14. After reaching the load 14 very top position of the axis 7 is now the mechanism 8. The float 9 under the influence of buoyancy force returns to the equilibrium condition at the interface of the oil with air.

Thus, the reconstruction of the mass of the float in the proposed transmitter is made, as in the prototype, by means of additional ballast. However, the amount required for this linear displacement of the float is determined not by the value of the level H1and the difference, thus, to solve the problem: to increase the efficiency of determining the amount of the controlled fluid. In addition, the invention simplifies the installation of level gauge on the tank and allows the use of the proposed sensor as not only stationary, but also a portable measuring device.

Level transmitter for liquids containing a measuring pulley, float associated with the pulley steel tape, a balancing mechanism in the form of a spring constant torque and the ballast, wherein the ballast is made in the form of goods of a given mass, suspended coaxially with the float on the flexible organs that are attached to the ballast wheels mounted on the axle, provided with a locking mechanism.

 

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