RU218411U1 - CONTROL AUTOMATIC FOR EMERGENCY PROTECTION - Google Patents

Abstract

The utility model can be used in the field of automation, in automation hardware for building security systems for industrial facilities. The technical result is to increase the reliability and efficiency of the emergency response system. The system contains input-output sensors, a storage device, a processor, a protective control device, a state sensor of a controlled object. The input-output system is made in the form of a digital intelligent input-output module that implements the functions of monitoring and starting the microcontroller. From the input module, the signal from the state sensor of the controlled object is fed to the microcontroller, which processes the signal and issues a decision to the control protection device.

Description

The utility model relates to the field of automation, in particular to emergency protection and automation, and can be used in automation equipment when building security systems for industrial facilities.

A Siemens emergency protection system is known, which includes sensors that control the technological parameters of a controlled object associated with a controller that provides security functions and consists of: input modules that ensure the coordination and conversion of electrical signals from sensors into a digital interface code corresponding to the sensor signal (http: //www.ste.ru/siemens/pdf/rus/09_S7-Safety_r.pdf).

The disadvantages of the known system are:

sequential execution of all security functions in one processor, in a common memory area;

hardware dependency of safety functions on each other.

impossibility of checking the safety function for false operation of the safety function.

The closest in technical essence and the achieved result is an emergency protection system containing state sensors of a controlled object and actuators connected to multi-channel input modules and output modules, input modules servicing sensors by input function, and output modules, actuators by output function, , as well as processor modules, input-output interfaces of the programmable logic controller PLC, devices for notifying the state of protection, which provide information about the beginning of an emergency and the time to exit from it (Landrini G. Integral security levels in accordance with IEC 61508 and 61511 standards and analysis their relationship with maintenance, Sovremennye tekhnologii avtomatizatsii 1/2009, Moscow: STA PRESS, 2009).

The disadvantage of the known system is that the system is intended for group use of security functions and none of the security functions in the system can be implemented locally, but only together with other security functions in the common program area of the PLC central processor. The failure of one module leads to the failure of the entire fire protection system (PSS). There are also unused I/O channels. All this reduces the reliability of the system in operation.

It is also a disadvantage of the device that any changes to one of the safety functions must be reconfirmed and all data and results rechecked. The input and output modules are also based on a multi-channel principle, so when used in a small ESD system where, for example, one analog output is used, the user is forced to use a 16-channel module. This creates multiple redundancy, which increases the likelihood of non-hazardous failures, false protection trips, and reduces the overall reliability of the system.

The task to be solved by the utility model is to increase the functional safety and reliability of the ESD system by creating a control automatic emergency protection (ESD).

The technical problem is solved by the fact that the control automatic emergency protection contains a state sensor of the controlled object. This sensor is connected to an I/O system connected to the processor and a protection control device connected to the I/O system.

According to the proposed utility model, the input-output system is made in the form of a digital input-output module that implements the function of controlling at least one parameter of the controlled object and includes a microcontroller.

The control automaton of emergency protection is additionally equipped with a state sensor of the controlled object, at least one redundant digital input-output module that implements the function of monitoring at least one parameter of the state of the controlled object. The output of the redundant digital input/output module is connected to the protection drive, the output of the additional state sensor of the monitored object is connected to the input of the digital input/output module, the interface outputs of which are connected to the processor via redundant communication channels.

The technical result, which is achieved by implementing the claimed set of essential features, is to increase the reliability of the PAZ system.

The essence of the utility model is illustrated by drawings, which show:

figure 1 - control automatic emergency protection;

figure 2 - hardware implementation of the universal intelligent input-output module;

figure 3 - functional diagram of the intelligent module.

The control automaton of emergency protection (figure 1) contains one sensor 1 of the state of the controlled object, connected to the duplicated input-output system 2, connected to the redundant protection communication processors 7 and 8, and connected to the duplicated input-output system at least one actuator protection 6, and additionally includes one additional sensor 10 of the state of the controlled object, one additional duplicated input-output system, made in the form of two universal intelligent input-output modules 12 and 15, implementing one safety function of the sensors 11, 14 of the state of the controlled parameter, and one additional protection actuator 13. The outputs of additional sensors 10, 14 of the state of the controlled object are connected to the inputs of both the main 16 and the backup 17, which are connected via communication channels to the protection communication processors 7, 8.

As sensors 1, 10, 11, 14 parameters of the state of the controlled object can be used sensors of pressure, temperature, flow, vibration, displacement, speed, etc.). As protection actuators 6, 13, for example, a valve, gate valve, motor, etc. can be used. The control circuit breaker additionally includes one redundant universal intelligent input-output module 9.

The input-output system is made in the form of a universal intelligent input-output module (UIIMV), which implements one safety function, for example, protection against exceeding the maximum pressure in the tank; protection against spontaneous explosion of the processed product when pressure, temperature and concentration of critical values are reached; protection of rotation mechanisms from catastrophic destruction when vibration parameters and axial displacements are exceeded; etc.

The sensor 1 of the state of the monitored object is connected in parallel to the main and backup universal intelligent input-output modules (UIIMV) 2 and 9, respectively, which are connected to the actuator 6 for protecting the object.

The main universal intelligent input-output module 2 and the redundant universal intelligent input-output module 9 are connected via a serial duplicated interface with the main and backup processors 7 and 8 of protection communications.

Processors 7 and 8 perform the function of a protection communication processor and do not affect the performance of the safety function.

The universal intelligent input-output module (UIMVV) is designed to receive signals from the sensor 1 for monitoring the controlled parameter of the state of the protected object (for example, pressure, temperature, position, etc.) and transmit control signals to the protection actuator 6 (for example, a valve, valve, motor, etc.).

The universal intelligent input-output module 2 (UIMVV) includes a microcontroller 3, at least one module 4 (UNIT1) for inputting a signal from the sensor 1 of the state of the controlled object to the microcontroller 3 and at least one module 5 (UNIT2) for outputting a signal from microcontroller 3 to the actuator 6 protection.

Each of the modules (UNIT1, 2… n) is installed in the universal socket in the UIMVV module. Each module is a complete constructive and circuit implementation of the input or output channel (figure 2, 3).

The input module 4 performs the function of inputting a signal with information about one control parameter, for example, from a temperature sensor, or from a pressure sensor, or from a position sensor, and the like. The output module 5 performs the function of outputting a signal to a protection actuator such as a valve, or a gate valve, or a motor, etc.

The inventive control automatic emergency protection operates as follows. The signal from the sensor (or a group of sensors) for monitoring the state parameter of the monitored object, for example, a temperature sensor (pressure, gas content, etc.), is fed through the communication channel to the inputs of specialized modules of the main and backup universal intelligent input-input modules, is converted into a digital format and digitally transmitted to the input of the microprocessor, intelligent module 2 input-output. In the memory of the microprocessor, a control decision is made cyclically on the need to turn on the protection actuator.

The digital protection enable signal is sent to the output module and initiates the protection device. Turning on the protection actuator initiates the UIMVV, which is the first to detect the fulfillment of the conditions for triggering the safety function, the second (it can be both main and backup) UIMVV with a maximum delay of the cycle time for the execution of the safety function also issues a signal to the actuator. The protection actuator, connected in parallel to the main 16 and backup 17 UIMVV, is brought into active position and transfers the process to a safe state.

The algorithm for performing a safety function is compiled individually for each function based on the technical regulations for the operation of the facility.

The universal intelligent input-output module (Fig. 2) implements the functions of monitoring one parameter of the state of the controlled object by reading the value of the sensor indication or the values of the indications of a group of sensors of the state of the controlled object, implementing the function of monitoring one parameter of the state of the controlled object, defining input variables for the security function.

The functional diagram of the intelligent module (Fig. 3) implements one safety function by continuously cyclic execution of this function.

Thus, the created emergency protection control automatic device satisfies the requirements of safety standards for both small-channel and multi-channel ESD systems.

This technical solution can be used when building security systems for industrial facilities.

Claims (2)

1. The control automaton of emergency protection, which includes a state sensor of the controlled object, connected to the input / output system, connected to the processor and the control device of protection connected to the input / output system, characterized in that the input / output system is made in the form of a digital intelligent input/output module that controls the state parameters of the controlled object and includes a microcontroller, signal input modules from the controlled object state sensor to the microcontroller, signal output modules from the microcontroller to the corresponding control protection device, an additional control device of the controlled object is installed on the control automatic emergency protection. 2. The control automatic emergency protection according to claim 1, characterized in that it additionally contains a backup processor connected via communication channels to a digital input/output module.

Images