SU767538A1 - Electromechanic loose-material level meter - Google Patents

Description

 - one -

The invention relates to the field of measurement of the level of bulk materials and can be used, for example, in measuring the level of coal dust in industrial explosives ..

Electromechanical level gauges are known, whose principle of operation is based on lowering the level of a float following a level, for example, a level gauge in which the float is made conical with an iup and conical lid connected by a bellows 1.

The disadvantages of the level gauge are the low reliability of the device and the complexity of the selection of the rigidity of the B;

The electromechanical level gauge of bulk materials is also known, which includes an electric drive with a winch, a cable-cable with a load, a spring-loaded float with a membrane, with which a movable element of an integrated inductive converter, a control unit, a control unit, a measuring drum, and a secondary device {2.

: A deficiency in the level gauge is / that the presence of a membrane at the base of the float reduces its mechanical strength, and hence the reliability of the device.

The purpose of the invention is to improve the operation of the level gauge.

5 This goal is achieved by the fact that the membrane is placed inside the rigid body of the float and rigidly connected in its central part with a load. . .

10 FIG. 1 is a schematic diagram of the equalizer; in fig. 2 general view of the float.

The electromechanical uironemer has an electric drive 1 of the winch 2, which contains a spinner 3 and a measuring drum 4, a cable-cable 5 with a suspended load 6. Regarding the load 6, the spring 7 is spring-loaded float 8. The spring 7 is supplied;

20 by an adjusting screw sleeve 9, on which a restrictive one is planted, the ring 10 of the float stroke upwards. The node is protected by an airtight elastic casing 11. The float 8 is formed by a cone-shaped body 12, and a plug 13, and its cavity is divided into two parts by a membrane 14, fixed along the perimeter by the edge of the body 12 and a plug 13, and moreover, rigidly articulated in its central part with a load

b. and the coils 15 of the inductive Yaroobazoyatel 16. The core 17 of the converter is rigidly articulated with the plug 13. The coils 15 through the conductor slugs tprs-1s white 5 are included in the measured circuit of the Omaid forming unit 18, the output of which is connected to the control drive 19 of the. the drum 4 is connected by means of a rotation angle sensor 20 to a measuring device 21.

The electromechanical level gauge works in the following way, - In the initial position, there is no impact of the measured medium on the float 8, the latter is occupied by a cable suspended from the cable. There are only 5 loads, 6 a certain position, thanks to the chosen ratio of the efforts of the membrane 14 and the spring 7, to-. The second is selected by the hub screw 9. When this output signal of the inductive transducer 16 is equal, its value is determined by the relative position of the coils 15 and the core 17, i.e. the membrane 14 relative to the float, 8. ;

When the signal from the transducer 16 is zero, the coma forming unit 18 discharges the command to lower the cable-cable 5, which goes through the control unit 19 to the electric drive 1. Rotation of the electric drive to the Down side continues for as long as. prk. float. 8 does not act on the surface of the measured medium. Upon encountering an obstacle, the float stops, and the load B, lowering, causes the diaphragm 14 to move. On the output of the transducer 1b, a signal of dispersion appears, which is fed to the input of the unit. FRONMIROV: nyYA Kryand, .. handles the command of the cable and cable lifting 5. Rotation of the drive in the direction of lifting the cable lasts until the moment when the interconnecting float 8 is balanced and the load a b when the trigger pulse appears / formed by the control unit 19. Eni, on the reverse drive 1.

after the indicated time lapse, the cycle is repeated.

When blockage or backfill float. 8, when it is moving up or down, the spring 7 is compressed by the action of forces acting on the outer surface of the housing 12. The diaphragm 14 with a load 6 and the coils 15 is displaced upwards. At the output of the converter 16, the signal of the races of 6s of the wave is sent, which, arriving at the input of the unit 18 for forming the command, processes the command to raise the cable. The rotation of the actuator in the lifting direction of the cable-cable continues up to. the moment of balancing the interposition of the float 8 and the load 6 and the presence of a permissive impulse. .

The level of the medium is measured along the length of the cable winded from the winch. For this purpose, an angle sensor 20 is mounted on the measuring drum 0/4. that Its output signal is fed to the secondary device 21, which fixes the continuous level value.

Claims (2)

1. USSR Author's Certificate No. 553471, cl. G 01 F 23/26, 1975. 2. USSR author's certificate number 672497, cl. G 01 F 23/26, 1978   (prototype).