GEN III Smart Proportioner – remote testing system

Regular testing and upkeep guarantee a maximum service life and functional and failure-related security of technical appliances. The similar applies to foam-based hearth extinguishing techniques and the foam proportioners installed in them.
Up to now, such testing and upkeep have required the presence of personnel on-site. However, it would be simpler and extra cost-efficient for extinguishing system operators if this was potential in a completely automatic and remote-controlled manner. For example, this may additionally make regular maintenance personnel journey to remotely positioned proportioners redundant. In addition, this would make positive that requirements by the producer, requirements and sets of regulations are observed with none practical deviations and unsuitable time intervals.
The distant testing system throughout the ‘Smart Proportioner’ improvement framework has been created only for this purpose. It is an development of the distant monitoring system.
Brief overview of the distant monitoring system
The distant monitoring system is used for proportioner monitoring in testing mode during maintenance and reside firefighting operations.
In the course of distant monitoring, the proportioning rate and other operating parameters are decided, recorded and forwarded to the system operator if necessary. Thus, the sleek functionality and operational readiness of the system are monitored and ensured this fashion.
A distant monitoring system consists of a management system, including an optionally available native display unit (HMI) if applicable, and sensor know-how. The sensor know-how includes, as a minimum, the likelihood to determine the water motor’s number of revolutions and to find out the froth agent flow fee. These values are used to calculate the proportioning fee. This determine is the core characteristic in the course of the operation and testing of a foam proportioner. Further sensor know-how is on the market on an optionally available basis.
The distant monitoring system helps the operating and repair personnel on-site. It can additionally be appropriate for distant monitoring of the froth proportioner.
However, it is a primary fact that personnel are always essential to carry out the maintenance work or the proportioning rate testing on-site as the system plays a monitoring position solely. It does not actively work together with the functioning of the proportioner.
In the course of distant monitoring, the proportioning fee and different working parameters are decided, displayed and forwarded. Images provided by Author / Contributor
Evolution – from distant monitoring to distant testing
The question is the means to additional minimize the maintenance effort on foam proportioners.
The solution lies in the distant testing system, the subsequent step of the clever FireDos proportioners. The remote testing system permits monitoring of the proportioner and individual maintenance, together with proportioning fee testing.
The situation of the proportioner may be checked with out having to start out up the fire extinguishing system. No personnel are required on-site. Proportioners in a distant place or that are only not often inspected by personnel on-site could be checked with out upkeep staff and associated bills, corresponding to journey expenditure. In particular, growing the testing interval is possible without additional efforts. The instruction guide for FireDos proportioners requires regular starting-up, utilizing the service crank manually at the least. This is intended to prevent deposits contained in the gear, impairing its ease of movement and thus conserving the proportioner’s performance. The remote testing system can undertake these regular movements and take a look at the proportioning rate, increasing the service life and practical safety of the proportioner.
What is the design of a distant testing system?
The remote testing system is usually primarily based upon the distant monitoring system. It is, nonetheless, notably prolonged by method of actuators. This is because they allow the fully independent operation of the remote testing system; i.e., the proportioning fee of the proportioner is tested without activating the water pumps of the fireplace extinguishing system.
The core parts embody a central management system, with an optionally available HMI, sensor know-how, electrical ball valve drives, an electrical drive for the proportioner and a bypass line previous the water motor.
The connection of the electrical drive and the proportioner is designed so that the electrical drive could have no interference with the proportioner’s performance within the case of a fire. This way, the benefits of the mechanical proportioning principle are preserved.
How does the remote testing system work, and the way can the proportioning price be checked with out activating the water pumps?
If in ready-to-operate mode, the proportioner is always within the proportioning place. Upon initiation of an automatic testing course of, irrespective of if after a defined time interval, upon request by way of a cloud resolution or from the hearth extinguishing system/a local operator, the proportioner is put into testing operation. Specifically, the management system puts the proportioner into testing operation utilizing an electrically actuated ball valve drive while the foam agent is not blended into the extinguishing water however returned to the foam agent tank. At the identical time, it opens the electrically actuated ball valve within the bypass line previous the water motor. Next, the electrical drive of the proportioner is activated, driving the entire proportioner at its start-up flow fee. The start-up move fee is the bottom working level of a proportioner to achieve its nominal proportioning price.
Due to the external electrical drive, the water motor works like a pump and generates a water move via the bypass from the water motor’s outlet to the water motor’s inlet. The operation causes no change of pressure in the extinguishing water line. The fireplace extinguishing system is due to this fact not influenced when the proportioner is tested.
As the extinguishing water circulate fee simulated by the exterior drive can also be recognized due to the known ratio of the water motor’s number of revolutions and the water circulate fee, simply the foam agent circulate rate should be determined to allow the next calculation of the proportioning rate. This is completed by a volumetric circulate meter between the proportioning pump’s outlet and the ball valve, which switches between returning and proportioning mode. This allows determination of the foam agent circulate rate, both in testing mode and while proportioning in case of an alarm.
The proportioning price is determined in accordance with the formulation as required within the standards and laws EN 13565-1, NFPA eleven, FM 4-12, and the Nordtest NT Fire 042 method.
Foam agent circulate price [l/min]
(Extinguishing water move fee x a hundred = proportioning rate %+ foam agent move rate) [l/min]
After completion of the testing course of, the electrical drive of the proportioner stops, the bypass line is closed, and the proportioner is returned to proportioning mode.
Sensor technology put in as an additional option or inside the electrical drive permits obtaining further data and conclusions about the state and condition of the respective unit. It is checked, for instance, whether the ball valves are of their correct positions or sufficient oil is in the crankshaft housing of the proportioning pump. In addition, the strain values on the pump inlet/outlet and the pressure on the water motor are recorded. Finally, measuring the complete system’s torque and the circulate price inside the bypass line allows checking the final situation of the proportioner.
The data could be displayed domestically or via a cloud answer. Controlling the upkeep operation is also possible by way of each interfaces.
What if there is an alarm throughout a testing process?
An necessary query is: Does the proportioner work without any limitations and as usual if there might be an alarm? The reply is: Yes!
The distant testing system is designed in such a means that extinguishing water can flow by way of the water motor and start it up at any time, even when the electrical drive is working on the same time. In เกจวัดแรงดันดิจิตอล , a singular, absolutely automatic and purely mechanical decoupling mechanism ensures that the electrical drive doesn’t intrude with the proportioner’s functioning and readiness to operate.
In case of an alarm, the ball valves within the bypass line and those for switching between returning and proportioning are immediately switched in order that the proportioner is in proportioning mode for firefighting. Thus, the control system is put into alarm mode in this case. This alarm mode causes the disabling of all features not needed at that moment and all ball valves to be set to their right position.
Therefore, in case of an alarm during testing operation, the ball valves swap to their correct place fully routinely and the electric drive is switched off. Even if the electrical drive continues to be operating or coming to a cease, the extinguishing water can flow via the water motor and drive the proportioning pump with out limitations. The alarm mode of the control system prevents re-activation of the electric drive or any unintended ball valve switching.
What advantages does a remote testing system provide?
Compared with commonplace proportioners and people equipped with a distant monitoring system, a distant testing system offers numerous advantages. They feature the next:
ν Proportione
Display view for testing operation of the FireDos remote testing system. Images equipped by Author / Contributor
cian should be on-site.
Regular proportioning fee testing: Regular proportioning rate testing ensures optimum functioning of the proportioner in case of a hearth. If the proportioning fee is just too low, the extinguishing success can be compromised. Overdosing causes the froth agent to be consumed faster than intended, resulting in the premature ending of the froth operation.
Increasing useful and failure safety because of increased testing intervals: An elevated check interval causes the proportioner to be tested totally automatically at shorter intervals of time. This notably reduces the chance of a failure remaining undetected for a longer time frame. In addition, more frequent testing prevents the formation of deposits inside the water motor.
Early fault detection and diagnostics: Faults within the proportioner or components of the extinguishing system, immediately affecting the proportioner’s functionality, can be recognized at an early stage of time. This contains, for example, stress variations in the extinguishing water line or a jammed suction line.
Inclusion of all features and benefits of the distant monitoring system: All features and advantages of the remote monitoring system are also present within the distant testing system, i.e. all related operating parameters are recorded and processed constantly and accurately in addition to documented in a log file. In addition, all information are displayed by a visualization.
Reduction of costs: Regular practical testing makes it possible to detect faults even earlier. This way, upkeep and repairs can happen before any more serious injury happens. The increased performance and fault safety of the proportioner ensures that the service lifetime of the proportioners is maximized and the probability of a failure is minimized. As a outcome, lowered service and working workforce on-site scale back costs significantly, significantly if the proportioner is situated in a distant place. In addition, useful testing of the proportioner allows early identification, evaluation and probably limiting a fault remotely. This makes service visits extra efficient and therefore less expensive.
Summary and prospect
The distant monitoring system already provides numerous benefits and helps reduce costs, nevertheless it cannot reduce the workforce required on-site.
The distant testing system is an answer for decreasing upkeep necessities. It is the next evolution in the midst of creating clever FireDos proportioners.
The remote testing system permits reducing the workforce required on-site to a minimal, together with shorter testing intervals and elevated failure security. This increases the proportioner’s service life.
If the proportioner is in a fault-free state, no further maintenance by personnel on-site is necessary, aside from an oil change. The oil change may be carried out by the operator’s personnel, too, simply and with none deeper knowledge of the working principle of proportioners. If a service visit or restore should nonetheless turn out to be essential, distant monitoring and early fault detection will make the planning and completion of such work more environment friendly.
Like the remote monitoring system, the remote testing system is an optimum symbiosis of mechanical proportioners and an clever electronic improve. Thus, the advantages from each technology fields are mixed with out compromising the functionality of mechanical FireDos proportioners.
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