CS228046B1 - Fire protection equipment for pneumatic material transport systems - Google Patents

Abstract

The purpose of the invention is to quickly detect a possible fire source and take immediate action. The device according to the invention has significantly smaller dimensions, its failure rate is reduced and the possibility of implementing new complex system functions is obtained without the need for electrical wiring modifications. The stated purpose of the invention is achieved by arranging the device so that it consists of a detector placed on a pipeline connected via an amplifier to a microcomputer, to which the actuators of the extinguishing device are connected, while the spray nozzles open into the pipeline.

Description

1,228,048

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a fire protection system for pneumatic material transport systems.

Many industrial plant technology objects are advantageously interconnected by piping systems, conveying loose, powdered, fibrous, or granular material / wood fiber, flour, grains, powdered chemicals, and the like, whose conveyance rates are relatively high. These transport systems are often threatened by fires or explosions caused by high-voltage discharge due to static electricity generated by the rubbing of moving material particles on the pipe walls, by the deposition of metal particles / debris, small metal parts into the piping system where at high conveying speeds, by heating against the piping walls, they will heat up and cause a fire or explosion in the next section of the system, and by dragging the glowing flammable particles out of other parts of the process equipment. There is a whole lot to consider in order to avoid fire or explosion in pipeline transport systems. Generally, these devices can be divided from the fortification of the conversion of the received energy into quantum, which changes the radiant power after the individual doses - photons, to an electrical signal which is proportional to the amount of photons per time unit (e.g. devices whose sensor is equipped with a photomultiplier and / or a thermal sensor which converts the radiated radiated power into a thermal sensor and transmits it correspondingly to the sensor's sensitivity to the electrical signal. the cells on which the thermoelectric voltage appears, proportional to the temperature difference of both ends of the cell; it was metric, which evaluates the instantaneous temperature of the sensor to determine the dependence of the sensor's electrical resistance on temperature; 228 048 Pneumatic, evaluate the variation of the radiated radiated power by the gas expansion of the gas pyroelectric, utilizing the signal resulting from the temperature dependence of the spontaneous polarization of the pyroelectric. In addition to these types of equipment, it is also possible to mention devices based on the use of ionization, where the safety device is activated by the smoke.

Said devices provide some protection against the formation of fire, but the main disadvantage is that they are relatively low sensitive mainly slow, therefore they have recently been replaced by devices working on the principle of detecting infrared radiation emitted by a hot object. These systems provide enough information! on the possibilities of fire, however, require a rather complex electronic evaluation of the part which ensures the reception and transmission of the necessary signals.

The drawbacks of the present state of the art are largely prevented by the provision of a pneumatic conveyor system for conveying material through a pipe according to the invention, which consists essentially of a pyroelectric or photon detector placed on a pipe connected via an amplifier to a microcomputer formed by an electronic a microprocessor and memory actuating unit, the actuators of the fire extinguishing device being connected to the outlet of the microcontroller actuator unit, the spray nozzles of which enter the conduit.

By combining a high-sensitivity and rugged responsive detector with an electronic control unit, equipped with a micro-processor, memory and active power hasiai device, it creates a high-performance detection and hasiai system that allows for the rapid detection of possible fire outbreaks and immediate firefighting. its failure rate is reduced, the possibility of realizing new, complex system functions, and the use of memory to enable the change of existing device functions to the desired functions, without the need for sophisticated electrical modifications, is obtained, - 3 - 228 046

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I, *

An essential part of the tunnel is a pyroelectric detector1, placed, for example, on a pneumatic tube 2; the detector 1 is connected via a transducer% to the electronic control unit input k, which includes the microprocessor 6 and the memory.

On the outputs of the electronic control unit 4, the associated actuators 2 of the fire extinguishers are connected, for example, non-flowing valves, contactors of the electric motors or signaling elements, for example signal lights, hooks and the like. Pyroelectric is placed in a suitable place in the motion of the tracked or heated particles. butbotropon detectors 1, a small heat source - simulation transmitter, such as a tube, hot strip, etc., is placed in the pipeline 2 against each detector 1, and sparks can be simulated by the simulation · 'This source can be initialized * from the radio , for example, by a button or automatically, based on the microcontroller-commanded control unit 4, the light bulb lights up on the basis of this command. The detector 1 has an output signal response to this signal - this ensures a remote control of the proper function of the detector 1 and the entire device. The detector 1 itself is connected by a cable with an electronic control unit 4 which receives signals transmitted by detectors 1 on the basis of the appearance of a burner. the object in the field of view and processing in such a manner and in a time sequence as the pre-loaded capsule into the firmly programmed memory / ROM / or programmable memory 6 / PROM, EPROM, REPROM / micro-computer system. For example, it indicates the passage of each spark, opens the solenoid valves in the pressurized water supply to the fire extinguishers 8 located in line 2 at a suitable distance from the detectors 1, and gives a signal. It adds the number of preloaders on the counter, each passing through a brief illumination of the signal lamp, or a heated horn; calculates the number of sparks per given time unit; if the number of pulses per time unit exceeds the set value, the acoustic and optic signaling will be triggered on-site or on the remote stand by the firefighters. At set intervals, using simulator-transmitters automatically checks for reliability? equipment; on reliability transmits a signal, for example, green · * 4 * · 228 048 light; automatioky checks the state of spare sources and gives a signal; when a power supply is overloaded, the automatic system supplies a signal and makes a signal. · A combination of mutual input and output signals can be easily created either by replacing a fixed programmed memory & le / ROM or by reprogramming the programmer 6 / PROM, EPROM / ', ί

The fire extinguishing device 6 consists, for example, of a fire extinguishing medium, usually water; a high pressure pump; a pressurized container allowing a further increase in the pressure of the exhalation media entering the spray nozzles 6 and the actuator member 9 in the manifold / solenoid valves, pump contactors and the like. This fire extinguisher device is coupled with an electronic control unit 4, the output signals of which are controlled 2 hasiaoe actuators 2 *

The device described above can be advantageously used, for example, in the woodworking industry, such as a pneumatic conveyor system, conveying, for example, wood fiber in fiberboard manufacturing plants. However, the system can be used wherever there is a possibility of sparks or warps, warmer than the environment that may cause a cell fire to occur, or to a different place, for example, the transport of powder materials in the food industry, or fibrous materials in the textile and wood-based industries ·

Claims (1)

BACKGROUND OF THE INVENTION 228 048 A fire protection device for pneumatic material transport systems by piping, characterized in that it consists of a pyroelectric or photon detector (1), located on the pipeline (2) connected via an amplifier (3) to a microcomputer via an electronic control unit. 4 / with a microprocessor (5) and a memory (6), the actuators (9) of the fire extinguishing device (7) being connected to the output of the microcontroller's electrical control unit (4), the spray nozzles (8) of which open the pipe (2)