RU69204U1 - CONTROL UNIT FOR GAS, OIL, GAS AND WATER-OIL PRODUCTS - Google Patents

Abstract

The control unit for the gas, oil, gas and oil products heater refers to control and regulatory systems. It contains interconnected controller; relay switching panel with electromagnetic relays, voltage converter, terminal board, LED indicators with built-in resistors. The controller is connected to the LEDs via the terminal board. The controller, relay switching panel, voltage converter are connected to the terminals for output. The technical result consists in simplifying the design while maintaining the necessary functionality. 1 n.p. f-ly, 3 z.p. f-ly, 1 ave., 3 ill., 1 tab.

Description

The utility model relates to control and regulatory systems of general purpose and can be used in devices for monitoring and automatic control of a heater of gas, oil, oil emulsions, water and other products.

Known control system and position control of regulatory bodies (SU copyright certificate for invention No. 1284408), which contains a control unit, command unit, switching unit, terminals, buses.

Also known are control systems [RU patents for utility model No. 36128, No. 61845] containing a control unit, a sensor unit of technological parameters, indicator devices.

Also known are control systems for starting the heater of an internal combustion engine [RU patents for invention No. 2213251 and utility model No. 52945]. The system data includes a control unit consisting of a processor unit, a sensor monitoring unit, an actuator switching unit, an indication unit, a control unit, a power supply.

The above systems also include a protection and control system for gas-consuming equipment [RU patent for utility model No. 543413]. This system contains an accident registration unit, a microcontroller, a sensor unit (torch sensor, intermediate and power relays, actuators), an ignition ON button. The modules are equipped with indicator lights.

Also known are devices for controlling a liquid heater [SU patents for invention No. 966276, No. 1260553, RU for invention No. 2183797 and utility model No. 22313, No. 48596]. These devices contain a control node, a switching node, coordination and feedback circuits, a power module. Some of them have a time relay, for example, in a device for automatically controlling the operation of a liquid heater [SU patent for invention No. 1260553].

The Start-02 control unit is also known [http://obshchemash.ru/Blocupr/start2.htm, LLC General, copies of the product pages are attached], designed to provide automated ignition and control of the working state of gas and liquid-fuel industrial energy burners equipment, and the Mak-07 integrated control system [Elkom-NN LLC, copies of the product pages are attached], designed to automate the operation of gas heaters, automate the operation of hot water boilers and mini-boiler rooms.

Also known is a set of automation means for a gas-piston power unit [RU patent for invention No. 2285887] related to regulating and controlling general-purpose systems. The above complex contains a programmable controller, discrete input and discrete output modules, a power supply, a relay unit, a control and indication panel, and a circuit breaker.

Also known are the control, protection and signaling units of the compressor compressor module (RU patents for IZ No. 2211471 and PM No. 18584) containing a programmable controller consisting of a processor module with flash memory with a VME system bus, discrete input and discrete output modules, an indication panel , thermal stabilizer, operating hours counter.

A gas heater control unit is also known [passport BUK-5PG.1 LLC NPP Tan-IT, Saratov, p.1, 3, 5, 6, 15, copies of pages are attached], which has a closed metal case, inside of which there is a printed circuit board with a single-chip microcontroller and auxiliary elements, a power transformer with rectifiers and stabilizers. On the walls of the case - operational controls, connectors for connecting external sensors and actuators, elements of the working and alarm systems and fuses. The unit is powered from an alternating current network with a voltage of 220 V. The unit is placed in a closed heated room, connected to a controlled heater through intermediate terminal boxes. The aforementioned control unit carries out automatic remote ignition and protective shutdown of the heater in case of unacceptable deviation of the monitored parameters, triggering an emergency and working alarm.

However, this unit cannot be placed directly on the heater, since it only operates in a heated room. This control unit also has a limited ability to change the parameters of the ignition program due to insufficient memory of the microcontroller and regulation

the temperature of the heated product and there is no connection with the upper level of the automated control system of the ACS.

Control and management units are also known [RU patents for utility model No. 27238, No. 29789] containing a programmable controller, TTL output module, discrete input modules, discrete output modules, a converter, the input-outputs of which are connected to RS-232 and RS- interfaces 485 (through the RS-485 interface, communication with the upper level of the ACS is carried out), a relay unit or modules, a power supply unit, a fan, an indication panel or indicator, a time counter. The control and management unit [RU patent for utility model No. 27238] additionally contains a fuse box, temperature converter, noise protection unit, and the unified control and management unit [RU patents for utility model No. 29789] additionally contains current limiting boards, spark protection barrier modules, converter , circuit breaker, protection board.

The closest analogue to the claimed utility model is a control and control unit [RU patent for invention No. 2275669], comprising a microcontroller, a modular measuring converter, a terminal board, discrete input and discrete output modules, an indication board, a power supply, an analog input expansion board, a board galvanic isolation, control and protection board, operating hours counter. The display board is connected via a microcontroller with discrete sensors, a control panel, a control and control panel. The microcontroller is also connected to a switching board, an expansion board for analog inputs, a galvanic isolation board. A modular measuring converter is connected to an analog input expansion board. Discrete input and output modules are connected to the terminal board.

However, the control and monitoring unit includes a large number of functional modules, and this unit does not have the ability to quickly change program parameters, since there is no connection with the upper level of the ACS.

The task of the claimed device is to simplify the design while maintaining its functionality.

The essence of the claimed utility model. The control unit for the gas, oil, gas and oil heater is characterized in that it contains a controller having input and output ports for discrete signals, an input port for analog signals, a universal input / output port UNI048, a communication interface port, power input terminals, a relay switching panel, voltage converter, terminal board, LED indicators with integrated resistors,

terminals for output to the functional elements of the heater and to the upper level of the automated control system, with the discrete signal output port connected to the relay switching panel, power input terminals connected to the voltage converter, UNIO48 universal input-output port with LED indicators via the terminal board, ports input of discrete and analog signals - with terminals for output to discrete and analog sensors of the heater, communication interface port - with terminals for output to top th level of an automated control system; the relay switching panel and the voltage converter are connected in parallel, the relay switching panel and the voltage converter are in turn connected to the terminals for outputting to the heater operating elements.

In addition, a control unit for a gas, oil, gas and oil products heater with the aforementioned features is claimed, in which the output terminals are made in a separate compartment.

In addition, a control unit for a gas, oil, gas and oil products heater with the aforementioned features is claimed, in which the relay switching panel comprises in parallel connected electromagnetic relays.

In addition, a control unit for a gas, oil, gas and oil products heater with the above characteristics is claimed, in which the communication interface port of the controller is an RS-485 type interface.

The technical result is achieved by simplifying the design, without limiting the necessary functionality. Thanks to the inventive device developed by the team of authors, it is possible to configure the parameters of the ignition program, the parameters of the temperature control algorithm of the heated product, as well as the interrogation of discrete sensors from the upper level of the ACS. This device also displays the status of actuators and sensors using LED indicators, continuously transfers information about the state of the heater, namely, operation, shutdown, accident, and the current temperature of the heated product to the upper level of the control system, as well as receiving commands from the upper level ACS. This unit is designed for use in the automatic ignition of the heater, for automatic monitoring of the state of sensors that carry out the technological process, maintaining the set value of the temperature of the heated product within the set limits, monitoring emergency situations and communicating with the upper level of the ACS. The inventive device can be operated in open air with an ambient temperature of from -40 ° C to

+ 50 ° C. This explains a number of characteristic features - resistance to moisture, heat, frost of the structure, and in this regard, it became possible to place the control unit for the heater of gas, oil, gas and oil products directly on the heater, in this regard, the length of the cable ties connecting the inventive device is reduced and a heater, and eliminates the need for intermediate terminal boxes, unlike one of the above analogues. The control unit for the heater of gas, oil, gas and oil products implements an automatic control mode of the heater.

The inventive utility model is illustrated using the attached figures 1-3, Tab., Which presents:

Figure 1 is a structural diagram of the inventive control unit for a heater of gas, oil, gas and oil products;

Figure 2 - diagram of the structural connection of the claimed device to the heater;

Figure 3 is an electrical diagram of the inventive control unit for a heater of gas, oil, gas and oil products;

Tab. - a list of elements shown in the electrical diagram, in which positions 1-16 are indicated:

1 - controller;

2 - panel of relay switching;

3 - voltage converter;

4 - terminal board;

5 - LED indicators;

6 - terminals for output;

7 - input port of discrete signals;

8 - port for inputting analog signals;

9 - port output discrete signals;

10 - input-output port UNI048;

11 - port of the communication interface;

12 - electromagnetic relays;

13 - compartment;

14 - “Stop” button;

15 - “Start” button;

16 - toggle switch "Network".

Declares a control unit for a heater of gas, oil, gas and oil products, which contains interconnected controller 1, panel 2 relay

switching, voltage converter 3, terminal board 4, LED indicators 5 with integrated resistors, terminals 6 for output. The presence of the inventive device is mandatory in the gas and oil heater. The heater itself can enter some other object, for example, a gas distribution station, which, in turn, has an automated control system. To turn on and off the gas and oil heater, the Stop button 14 and the Start button 15 are designed.

Controller 1 (RTU188 Fastwel) has ports 7-11, presented in the form of connectors with an input voltage of 24 V and receiving input signals from analog and discrete sensors, issuing output signals to terminal board 4 and relay switching panel 2: input port 7 of digital signals, input port 8 analog signals, output port 9 discrete signals, input / output port 10 UNIO48, port 11 of the communication interface with software implementation. The operation of the inventive device in conjunction with sensors and actuators of the heater is carried out using a working control program located in the memory of controller 1. Controller 1 receives, processes and transmits information from sensors, actuators. The controller 1 contains terminals for power input, through which the controller 1 is connected to the voltage converter 3 by means of wires. Wires belonging to one port have a common bus. The output port 9 of the discrete signals of controller 1 is connected to the relay switching panel 2 by a loop cable (flat cable with IDC connectors), the universal input-output port 10 of UNIO48 of controller 1 is connected with LED indicators 5 through the terminal board 4 by means of a second loop, the input ports are discrete and analog signals 7 and 8, respectively - with terminals 6 for output to the heater, namely to its discrete and analog sensors, connected via wires (one wire is connected to one terminal). Controller 1 is connected to the upper level of the control system via the RS-485 communication interface: port 11 of the communication interface - with terminals 6 for output, intended for communication with the upper level of the control system.

Panel 2 relay switching (TBR 8 Fastwel), containing a set of parallel-coupled electromagnetic relays 12, provides coordination of the output signals of the controller 1 and the signals on the Executive elements of the heater. The electromagnetic relay 12 is presented in the form of normally open single-pole channels, providing the ability to switch circuits at a load current of up to 10 A at a voltage of up to 270 V AC or up to 30 V DC. Panel 2 relay

switching commutes the power circuits of alternating and direct current using eight electromagnetic relays 12. Panel 2 relay switching and terminal 6 for output are connected by wires. When you turn on the switch "Network" 16, the circuit closes and voltage appears.

Voltage converter 3 (HCL 150.10) converts 24 V to 5 V to power controller 1. Controller 1 is designed for 5 V, actuators for 24 V. Voltage converter 3 is connected to terminals 6 for output via wires. The voltage converter 3 and the relay switching panel 2 are connected in parallel.

Terminal board 4 transfers from one loop to several terminals for supplying power to LED indicators 5.

The inventive device may have an spark protection barrier (TCC-Ex "TECON"), which connects the explosion-proof area of the control unit of the gas, oil, gas and oil products with the explosive zone of the heater. The spark protection barrier is connected to the controller 1 via the RS-232 communication interface.

The inventive device has a compartment 13 - adapter, which contains terminals 6 for output and is separated from the above elements. Separation of the control unit for the gas, oil, gas and oil heater prevents the possibility of damage and disconnection of these elements when the inventive unit is connected to the heater through terminals 6 located in compartment 13 for output to the heater, namely its power source, its discrete and analog sensors, its actuators and to the upper level of the control system of the facility, including the heater, for example, control system of a gas distribution station.

The compartment 13 is made, for example, based on WAGO terminals in the form of standardly arranged rows of terminals 6 for output. Fuses are placed in terminals 6 for output, designed to supply power to the control unit for the heater of gas, oil, gas and oil products.

The control unit of the gas heater, oil, gas and oil products works as follows. Voltage is supplied through terminals 6 for output to a heater, which is not part of the inventive unit, located in a separate compartment 13, from the heater’s power source when the “Network” switch 16 is turned on simultaneously to panel 2 of relay switching and through voltage converter 3 to controller 1. C universal input-output port 10 of UNI048 controller 1 voltage is applied to terminal board 4, LED indicators 5. Check the operation of LED indicators 5. After 15 seconds. turns on

Stop mode. Controller 1 "polls" ports 7 and 8 of the input analog and input discrete signals, checks whether the sensors on the heater are normal. If any heater sensors do not function normally, the corresponding LED indicators 5 light up.

From the "Stop" mode by a long press of the "Stop" button 14, the claimed unit can be transferred to the "Test" mode, which allows you to check the functioning of actuators.

After pressing the "Start" 15 button, the controller 1 puts the inventive control unit for the heater of gas, oil, gas and oil products in the mode of "Ventilation". Then, after about 10 minutes, the “Ignition” mode begins. The controller 1 sends signals to the panel 2 relay switching, electromagnetic relays 12 include actuators in a given program of ignition sequence.

After the ignition, the inventive device switches to the "Work" mode. In this mode, the temperature of the heated product is positionally controlled in accordance with the signal of the analog temperature sensor received by the controller 1 through terminals 6 for output to the heater. If the current temperature of the heat carrier, with which the gas is heated in the heater, is lower than the lower boundary of the gas heating control zone, the small combustion sensor located in the heater is triggered. If the temperature of the coolant is higher than the upper boundary of the gas heating control zone, the large combustion sensor located in the heater is activated, and the heater enters the low combustion mode. If the temperature continues to increase in the small combustion mode, the “Standby” mode is activated (only the ignition burner works), which continues until the temperature value returns to the specified range.

Setting and regulation of parameters is carried out from the upper level of the ACS. To ensure control of the operating modes of the heater and the possibility of remote control, a serial data channel is provided via the RS-485 interface through port 11 of the communication interface.

In the event of an emergency, the gas supply is automatically turned off with a corresponding notification of the reason for the shutdown by LED indicators 5.

Example.

The product is successfully tested at the Gazprommash plant in Saratov, acceptance and certification tests.

Claims (4)

1. The control unit for a gas, oil, gas and oil heater, characterized in that it contains a controller having input and output ports for discrete signals, an input port for analog signals, a universal input / output port UNIO48, a communication interface port, power input terminals, a panel relay switching, voltage converter, terminal board, LED indicators with built-in resistors, terminals for output to the functional elements of the heater and to the upper level of the automated control system it is connected with the relay switching panel, the terminals for power input are connected to the voltage converter, the universal input / output port UNIO48 with LED indicators through the terminal board, the input ports of discrete and analog signals with terminals for outputting to discrete and analogue heater sensors, communication interface port - with terminals for outputting to the upper level of the automated control system, relay switching panel and voltage converter Nena parallel relay switching panel and the voltage converter are connected in turn to the terminals for output to actuator elements of the heater. 2. The block according to claim 1, characterized in that the terminals for output are made in a separate compartment. 3. The block according to claim 1, characterized in that the relay switching panel contains parallel-connected electromagnetic relays. 4. The unit according to claim 1, characterized in that it has a communication interface port of the controller, is an interface of type RS-485.