RU2433482C2 - Educational training complex "automatic regulation and therotechnical control" - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: device has a container for filling with liquid which is divided by a partition wall, a main stop valve, a control valve, a sensor for the level of liquid in the right-hand side part of the container, a contactor for the level of liquid in the left-hand side part of the container, a pump, an industrial manometre, a pressure sensor, an electric-contact manometre, a flow indicator, a diaphragm, a flow sensor, a temperature sensor, liquid level indicators, a flow regulator, devices for recording flow, pressure, level and temperature, devices for signalling flow, pressure and level. The container is bound by a system of sucking, blowing and auxiliary pipes, and also has data connections with a dynamic mnemocircuit for displaying the position of the stop and stop-control valves, the level in each part of the container and the direction of movement of the working medium in the pipes.

EFFECT: broader functional capabilities of the educational training complex.

6 dwg

Description

The invention relates to teaching aids and can be used in gas processing, oil refining and other industries for the preparation of technological operational personnel for admission to independent work in order to acquire practical skills in the control of technological processes.

The famous "Driving simulator", RU 72563, IPC G09B 9/04, designed to develop driving skills among students. The disadvantage of a driving simulator is its low functionality.

Also known is the “Stand for studies of hydrocarbon fluid filtration processes”, RU 72347, IPC G09B 23/16, including a reservoir model placed in a thermostatic unit, pressure and temperature sensors, a system for filling the gases and liquids under study, a working pressure generating unit and a separation cylinder block, pressure regulator, gas meter, vacuum pump, system for regulating and monitoring the parameters of the filtration processes, characterized in that the detonation combustion chamber is included in the test bench to study the result in thermal and shock-wave effects on models of oil and gas reservoirs.

The proposed utility model solves only the technical problem of determining the results of thermal and shock-wave effects on the studied object.

The closest analogue (prototype) is the “Stand for studies of the processes of filtration of hydrocarbon fluids”, RU 72347, IPC G09B 23/16. The main disadvantage of this prototype is that it solves the problem of studying the effects arising from the physical modeling of oil and gas reservoirs.

The problem solved by the invention is the expansion of the functionality of the training simulator complex “Automatic regulation and heat engineering control”, achieved by analyzing the state of actuators and sensors for monitoring the state of the environment and adequately reflecting their work in combination with dynamic process visualization devices.

The essence of the proposed technical solution is illustrated by the circuit diagram shown in figures 1 and 2.

The training simulator complex includes a capacity B01, divided by a partition into two unequal parts, left and right. There is water in the tank, which is pumped by pump 12 (P01) from one part of the tank to another. Using shutoff valves 2, 3, 5, 6, the direction of flow of the pumped water and the place of its selection changes, and the characteristics of the control object change accordingly. It is also possible to completely pump water into the sewer by opening the shutoff valve 16. The flow rate of the pumped water is controlled by valve 20 (FV 001) installed on the pumping line. Valve 20 is an integral part of the pumped water flow control loop, this loop also includes: a positioner and a flow measuring unit, consisting of a differential pressure transducer 9 (FT 001), a standard constricting device - diaphragm 13 (FE 001), and impulse lines. The auxiliary equipment in this circuit is a filter reducer, which serves to clean and maintain the set value of the air pressure supplied to the positioner from a compressor installed in a separate room. The flow rate of the pumped water is measured and visualized by the flow indicator 4 (FI 002). To control the pressure on the transfer line, a pressure sensor 19 (PT 002), a technical pressure gauge 14 (PI 01) and an electric contact pressure gauge 22 (PIS 003) are installed. The change in pressure in front of the control valve 20 can be done using shut-off valves 17 mounted on the bypass line. The water level on the right side of the tank is measured by a level sensor 11 (LT 002) and monitored by a level indicator 10 (LI 001). To automatically turn off pump 12 (P01) and turn on an alarm about an extremely low water level on the left side of the tank, a level 8 contactor (LSL 03) is installed in it. The water temperature in the tank is measured by a resistance thermometer 15 (TE 001).

The values of the measured parameters from the primary transducers (sensors) are received on the control and monitoring panel of figure 1 and figure 4.

The following are installed on the switchboard: flow regulator 25 (FIC 001), recorder 26 (FIR 001, PIR 001, LIR 002) with three recording channels, substitution station, temperature indicator 29 (TIR 001), limit value signaling panel 27 (FAL 001, PAL 003, LAL 002, LAL 003), control buttons for the display, start and stop keys for the compressor and pump with warning lights.

To display the positions of shut-off and shut-off and control valves, levels in each part of the tank and the directions of movement of the working medium through pipelines, the simulator complex has information links with a dynamic mnemonic diagram.

The dynamic mimic is placed on a plastic base and corresponds to the circuit diagram shown in figure 1.

The light indication of the mimic diagram is made on single LEDs (green and red to indicate the position of the shut-off and shut-off and control valves) glow. The LEDs indicating the state of the pipelines are logically assembled into a matrix of green LEDs with vertical and horizontal control lines.

The capabilities of the training complex (figure 1)

1. Familiarization with the training complex.

The training complex is off. In this position, it is possible to familiarize students with the full strapping of the training complex, the location of shut-off and shut-off and control valves, pressure, flow, level, temperature sensors and a control panel device.

2. Checking the training complex at work

Power is supplied to the control and monitoring panel (Fig. 4). The compressor is started with a key (installed in a separate room) and air is supplied to the positioner through the filter reducer, and from it to the control valve 20. The maximum flow rate of the medium is set in the manual control panel of regulator 25 in manual mode. Shut-off valves 2, 3, 5, 6 and control valve 20 are open, shut-off valves 17 are closed. The key from the control panel starts the pump 12 (P01) and checks all instrumentation and automation, manually changing the flow rate of the working medium by the regulator 25.

3. The mode of monitoring the operation of the automatic locking device according to the level on the left side of the tank B 01.

Shut-off valves 2, 6 and control valve 20 are open, and shut-off valves 3, 5, 17 are closed. The pump 12 (P01) is turned on and the working medium is pumped from the left side of the tank B01 to the right. The level increase on the right side of the tank can be controlled by the level indicator 10 (LI 001) and on the recorder 26 (LIR 002). When the left side of the tank reaches 20% of the level, the contactor of level 8 (LSL 03) is activated, which sends a signal to the interlock (located in the control and monitoring panel), which in turn stops the pump and turns on the light and sound signaling. The moment of operation of the level contactor must be adjusted if it tripped earlier or later. If the pump does not stop or the alarm does not work, then a fault is searched.

4. The mode of monitoring the operation of the automatic locking device according to the level on the right side of the tank B01.

Stop valves 3, 5 and control valve 20 are open, and stop valves 2, 6, 17 are closed. The pump 12 (P01) is turned on and the working medium is pumped from the right side of the tank B01 to the left. The lowering of the level on the right side of the tank can be controlled by the level indicator 10 (LI 001) and on the recorder 26 (LIR 002). When the level reaches 40% on the right side of the tank, a level 11 sensor (LT 002) is activated, which sends a signal to the interlock (located in the control and monitoring panel). The locking device stops the pump and turns on the light and sound alarms. If necessary, the level sensor 11 (LT 002) is configured.

5. The mode of influence on the regulation system through the bypass line.

Shut-off and shut-off and control valves are in the position of the previous mode. Regulator 25 is set to automatic mode. In the process of operation of the training complex, shutoff valves 17 located on the bypass line are opened. As a result, a pressure drop occurs before the control valve 20 and, as a result, the flow rate is reduced. The goal is to influence the flow control system, follow the logger 26 and analyze how all the mechanisms included in the flow control system will work and during what time the control valve 20 will reach the specified mode. If necessary, adjust the positioner.

The implementation of practical work.

Practical work No. 1. Conducting a TO-3 PMD 230 differential pressure transmitter from Endress + Hauser used in the flow control circuit.

The flow measurement unit (figure 3) consists of the following elements:

- primary flow converter, diaphragm FE001 (pos.13);

- impulse lines (item 44);

- differential pressure transmitter PMD 230 from Endress + Hauser FT001 (item 9);

- shutoff valves (items 34, 35, 36, 37, 38, 39, 40, 42, 43);

- gas collecting vessel (pos. 41).

Work order

1. Disconnect the Converter 13 from the impulse lines, sequentially closing the shut-off valve 38, opening the equalizing valve 40, closing the shut-off valve 39.

2. Gently open the drain valve 36 on the impulse line, check the impulse line for patency (blow out the impulse line). Close the drain valve 36.

3. Gently open the drain valve 37 on the impulse line, check the impulse line for patency (blow out the impulse line). Close the drain valve 37.

4. Slightly open the gas vent valve 43 from the left gas collection vessel 41 and close it after the liquid has appeared.

5. Slightly open the gas vent valve 42 from the right gas collection vessel 41 and close it after the liquid has appeared.

6. Apply pressure to differential pressure transmitter 9 (FT 001) by opening shut-off valve 38.

7. Using needle valves 45 on the sensor flanges, remove gas plugs from the sensor chambers alternately until fluid appears.

8. To make the correction of the zero of the converter using external adjustment buttons (figa, 5B, see table).

External Button Functions A single press of a button (see figv) + Z Increase the lower limit (zero) by 1 unit -Z Decrease the lower limit (zero) by 1 unit + S Increase the upper limit (range) by 1 unit -S Decrease the upper limit (range) by 1 unit Pressing both two buttons at the same time + Z and -Z Take the actual pressure value as the lower limit (zero), i.e. assign current output value 4.00 mA + S and -S Take the actual pressure value as the upper limit, i.e. assign a current output value of 20.00 mA

9. Turn on the inverter by closing equalizing valve 40, then opening shut-off valve 39.

10. Inspect the transmitter for compliance with the requirements for explosion-proof electrical equipment.

11. Check for indications on the 1st channel (FIR 002) of the Registrar Modumat 100, (pos. 26).

Practical work No. 2. Carrying out TO-3 electrocontact pressure gauge EKM-1U.

Pressure gauges, vacuum gauges and pressure gauges showing electrical contact are designed to measure the excess and vacuum pressure of liquids, gas and steam and control external electrical circuits by turning contacts on and off in alarm circuits, automation in blocking technological processes.

Pressure gauges, vacuum gauges and mano-vacuum gauges (hereinafter referred to as gauges) are manufactured with the closing and opening contacts of the alarm device, which are set to operate at the upper and lower set pressure values.

The electrocontact manometer EKM-1U pos.22 (Fig. 1) is installed in the water supply line to the tank after the control valve 20. When the pressure drops to 0.1 kgf / cm (pump stop, valve closure), it gives a signal to the alarm circuit about lowering the pressure.

The order of TO-3. (Fig.6)

1. Disconnect the electrical contact pressure gauge from the impulse line by turning the three-way valve 53 to the position that cuts off the pressure gauge from the impulse line and connects it to the atmosphere.

2. Remove the terminal block protective cover 59.

3. Verify that there is no voltage at terminals 56, 57, and 58.

4. Check the marking on the wires, if necessary, update the marking.

5. Having unscrewed screws of plugs terminals 56, 57, 58, remove wires.

6. Clean the terminals of dirt.

7. To remove a lock ring 51 glasses of the manometer, to remove glass.

8. Clean the contacts of the electrical contact device 50 with an eraser, wipe the contacts with alcohol.

9. Check the position of arrow 46 of the pressure gauge.

10. Replace the glass and snap ring 51.

11. Insert a screwdriver into the slot of the head 49, move the lower setting 47 up to the stop, the movable contact of the lower one at the head should reach the end of the scale. Return setting to place.

12. Insert a screwdriver into the slot of the head 49, move the upper setting 48 down to the stop, the movable contact of the lower setting should reach the beginning of the scale. Return setting to place.

13. Using a multimeter, check the resistance of the group's closed contacts.

14. Set the lower setting 47 to the trigger point of 0.1 kgf / cm ² .

15. Using the clamp 55, install the connection fitting 54 on the three-way valve 53.

16. Connect the pressure calibrator to the fitting 54 and terminals 56, 57, 58 of the signal device.

17. Check the accuracy of the pressure gauge on five points and the response point of the contact device. The error of indications and alarm must not exceed the established.

18. To disconnect the calibrator from the manometer, to remove a clamp 55 with the union 54.

19. To establish wires on plugs, according to marking, to tighten screws.

20. Install the terminal block protective cover 59.

21. Connect the electric contact pressure gauge to the impulse line by turning the three-way valve 53 to the position connecting the manometer to the impulse line.

Claims (1)

The training simulator complex includes a tank for filling liquid, divided by a partition, the main stop valves; control valve; liquid level sensor on the right side of the tank; liquid level contactor on the left side of the tank; pump; technical pressure gauge; pressure meter; contact manometer; flow indicator; aperture flow sensor; temperature sensor; liquid level indicators; flow regulator; recording devices for flow, pressure, level, temperature; devices for signaling flow, pressure, level, while the tank is tied up with a system of suction, discharge and auxiliary pipelines, and also has information links with a dynamic mimic diagram for displaying the positions of shut-off and shut-off and control valves, levels in each part of the tank and the direction of movement of the working medium through pipelines in dynamics.

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