RU2005291C1 - Device for checking position of surface of separation of oil and water - Google Patents

Abstract

SUMMARY OF THE INVENTION: the device comprises an encoder, vertically filled water containers and sealed from below the containers with working sensing elements made in the form of a spiral, one end of which is supported. Each container is placed in a housing with holes. Each case is rigidly fastened with the previous and subsequent. The encoder is made in the form of resistors located one in each capacity. 2 ill.

Description

The invention relates to a measurement and control technique and can be used to control the oil-water phase separation.

A device for controlling the level of a conductometric type is known, comprising measuring and reference electrodes that are lowered into a controlled liquid and from which level information is taken (see, for example, GN Bobrovnikov and other Methods of level measurement, M .: Mechanical Engineering, 1972, p. 98-103).

Such level gauges can work well only in pure water, since in other liquid media the electrodes quickly lose their sensitivity due to the fouling of the surface of the electrodes with the components contained in the controlled fluid.

The closest technical solution to this is a commercially available device for controlling the level of phase separation of the Elite, containing 11 glasses filled with water, in which electrodes are placed, each of which is connected to an indicator.

The disadvantage of this device is that it is subject to the possibility of mechanical stress and hydrodynamic effects of the environment. In addition, each electrode is connected by an independent wire to the information unit, and this necessitates the use of a multicore cable, which reduces the noise immunity.

The aim of the invention is to increase the reliability of control and reduce the size.

This goal is achieved by the fact that in the device for controlling the level of the oil-water phase separation, containing vertically filled and sealed bottom containers with working sensitive elements, one of which is support, each of which is placed in the housing with holes, an encoder is made, made in the form of resistors located one at a time in each capacitance, each sensitive element being made in the form of a spiral, and each housing is rigidly fastened to the previous and the next.

The design of the electrode in the form of a spiral serves to reduce the effect on the measured resistance of the surface state of the sensor element, i.e. transient resistance of a sensor-water pair.

The presence of an encoder allows information to be obtained via a two-wire communication line, and its placement in one housing eliminates the need for an additional housing and the issue of temperature stability.

Figure 1 shows the proposed device, a General view; Fig. 2 is a sectional view of the structure of one container.

The device comprises a housing 1 with holes rigidly connected to a fastening element 2, which serves to fasten the sensor elements and protect them from damage. Inside the case are P

sealed containers below, in which the sensitive elements 4 are placed, made in the form of a spiral and filled with water. Moreover, P-1 of the sensing elements are control, and one is the reference. AT

case 1 and containers 3 have windows 5 for the delivery of a controlled medium.

The device operates as follows,

Level Detector

phase separation is fixed stationary in the technological apparatus in the place where it is necessary to determine the level of phase separation. The controlled medium enters through the holes 5 into the housing and enters

in contact with the surface of the water filling the tank 3, and then with the sensitive elements 4. Water in sections 3 is necessary to protect the sensitive elements 4 from direct contact with oil.

The supply current supplied to the sensor, flowing through the sensing elements and the controlled medium, creates a voltage drop in this section of the circuit, proportional to its resistance. When

the controlled electrode is transferred from oil to water (or vice versa), then the resistance of the electrode-working medium circuit section changes approximately by an order of magnitude. Since the detector is a discrete device, fluctuations in the resistance of the working medium do not affect its operation at all.

The signal from the sensing element is fed to the encoder, which transmits information about the level position via two wires.

(56) A device for monitoring and regulating the electric mode and the level of media separation in the ELITA TO technological apparatuses and the AIS 2.390.029TO operating instructions. Developer Ranskoye SKB NPO Neftekhimavtomatika, 1987.

Claims (1)

SUMMARY OF THE INVENTION A DEVICE FOR MONITORING THE SURFACE POSITION OF THE OIL AND WATER SECTIONS, containing vertically filled and watertight containers with working sensitive elements, one of which is support, each of which is placed in a case with holes, and a signal processing unit, characterized in that. in order to increase reliability and reduce dimensions, an encoder is introduced into it, made in the form of resistors located one in each capacitance, each sensitive element being made in the form of a spiral, and each case is rigidly fixed with the previous and next. FIG. i FIG. 2