GEN III Smart Proportioner – remote testing system

Regular testing and maintenance guarantee a most service life and useful and failure-related safety of technical appliances. The similar applies to foam-based hearth extinguishing systems and the froth proportioners put in in them.
Up to now, such testing and upkeep have required the presence of personnel on-site. However, it will be simpler and more cost-efficient for extinguishing system operators if this was attainable in a completely computerized and remote-controlled method. For example, this would also make regular maintenance personnel travel to remotely situated proportioners redundant. In addition, this would be positive that requirements by the producer, requirements and units of regulations are noticed with none practical deviations and unsuitable time intervals.
The remote testing system inside the ‘Smart Proportioner’ development framework has been created just for this objective. It is an advancement of the remote monitoring system.
Brief overview of the distant monitoring system
The remote monitoring system is used for proportioner monitoring in testing mode throughout upkeep and reside firefighting operations.
In the course of remote monitoring, the proportioning price and other operating parameters are determined, recorded and forwarded to the system operator if needed. Thus, the graceful performance and operational readiness of the system are monitored and ensured this fashion.
A distant monitoring system consists of a control system, including an elective local display unit (HMI) if relevant, and sensor expertise. The sensor technology consists of, as a minimum, the likelihood to discover out the water motor’s number of revolutions and to find out the foam agent flow price. These values are used to calculate the proportioning rate. This determine is the core characteristic through the operation and testing of a foam proportioner. Further sensor technology is available on an optional basis.
The remote monitoring system helps the operating and repair personnel on-site. It can also be suitable for remote monitoring of the foam proportioner.
However, it’s a fundamental proven truth that personnel are always needed to carry out the maintenance work or the proportioning rate testing on-site because the system plays a monitoring role only. It does not actively work together with the functioning of the proportioner.
In the course of remote monitoring, the proportioning rate and other working parameters are determined, displayed and forwarded. Images equipped by Author / Contributor
Evolution – from remote monitoring to remote testing
The question is tips on how to further decrease the maintenance effort on foam proportioners.
The solution lies within the remote testing system, the following step of the clever FireDos proportioners. The distant testing system allows monitoring of the proportioner and particular person upkeep, including proportioning price testing.
The condition of the proportioner can be checked with out having to begin out up the hearth extinguishing system. No personnel are required on-site. Proportioners in a remote place or that are only rarely inspected by personnel on-site may be checked with out upkeep employees and related expenses, similar to travel expenditure. In particular, growing the testing interval is possible with out extra efforts. The instruction handbook for FireDos proportioners requires common starting-up, utilizing the service crank manually at least. This is meant to prevent deposits contained in the equipment, impairing its ease of motion and thus conserving the proportioner’s performance. The remote testing system can adopt these common movements and test the proportioning price, rising the service life and useful safety of the proportioner.
What is the design of a remote testing system?
The remote testing system is mostly based mostly upon the remote monitoring system. It is, however, particularly extended by the use of actuators. This is because they allow the utterly unbiased operation of the distant testing system; i.e., the proportioning fee of the proportioner is tested with out activating the water pumps of the fireplace extinguishing system.
The core elements embody a central management system, with an optional HMI, sensor expertise, electrical ball valve drives, an electrical drive for the proportioner and a bypass line past the water motor.
The connection of the electrical drive and the proportioner is designed in order that the electrical drive may have no interference with the proportioner’s functionality within the case of a fireplace. This means, some great advantages of the mechanical proportioning principle are preserved.
How does the remote testing system work, and the way can the proportioning price be checked without activating the water pumps?
If in ready-to-operate mode, the proportioner is all the time within the proportioning position. Upon initiation of an computerized testing course of, regardless of if after an outlined time interval, upon request through a cloud resolution or from the hearth extinguishing system/a local operator, the proportioner is put into testing operation. Specifically, the control system places the proportioner into testing operation utilizing an electrically actuated ball valve drive whereas the froth agent is not mixed into the extinguishing water however returned to the foam agent tank. At the same time, it opens the electrically actuated ball valve in the bypass line past the water motor. Next, the electric drive of the proportioner is activated, driving the complete proportioner at its start-up move price. The start-up circulate rate is the bottom operating level of a proportioner to reach its nominal proportioning price.
Due to the exterior electrical drive, the water motor works like a pump and generates a water circulate through the bypass from the water motor’s outlet to the water motor’s inlet. The operation causes no change of strain in the extinguishing water line. The hearth extinguishing system is therefore not influenced when the proportioner is examined.
As the extinguishing water circulate fee simulated by the exterior drive is also known because of the known ratio of the water motor’s number of revolutions and the water move price, just the foam agent circulate price should be determined to permit the following calculation of the proportioning fee. This is done by a volumetric move meter between the proportioning pump’s outlet and the ball valve, which switches between returning and proportioning mode. This allows willpower of the froth agent move fee, both in testing mode and while proportioning in case of an alarm.
The proportioning rate is set according to the method as required within the requirements and laws EN 13565-1, NFPA 11, FM 4-12, and the Nordtest NT Fire 042 technique.
Foam agent move fee [l/min]
(Extinguishing water move rate x a hundred = proportioning fee %+ foam agent circulate rate) [l/min]
After completion of the testing course of, the electric drive of the proportioner stops, the bypass line is closed, and the proportioner is returned to proportioning mode.
Sensor know-how put in as an extra possibility or inside the electrical drive permits obtaining further data and conclusions in regards to the state and condition of the respective unit. It is checked, for example, whether the ball valves are of their correct positions or enough oil is within the crankshaft housing of the proportioning pump. In addition, the stress values at the pump inlet/outlet and the strain on the water motor are recorded. Finally, measuring the entire system’s torque and the flow fee contained in the bypass line permits checking the final situation of the proportioner.
The knowledge could be displayed regionally or by way of a cloud solution. Controlling เกจวัดแรงดันnuovafima can additionally be potential through each interfaces.
What if there may be an alarm during a testing process?
An necessary question is: Does the proportioner work without any limitations and as usual if there’s an alarm? The reply is: Yes!
The distant testing system is designed in such a means that extinguishing water can circulate via the water motor and start it up at any time, even if the electrical drive is working on the same time. In addition, a singular, fully 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 people for switching between returning and proportioning are immediately switched in order that the proportioner is in proportioning mode for firefighting. Thus, the management system is put into alarm mode in this case. This alarm mode causes the disabling of all functions not necessary at that second and all ball valves to be set to their appropriate position.
Therefore, in case of an alarm throughout testing operation, the ball valves change to their appropriate place fully mechanically and the electric drive is switched off. Even if the electric drive remains to be operating or coming to a cease, the extinguishing water can circulate through the water motor and drive the proportioning pump without limitations. The alarm mode of the management system prevents re-activation of the electric drive or any unintended ball valve switching.
What benefits does a remote testing system provide?
Compared with normal proportioners and people outfitted with a remote monitoring system, a distant testing system supplies varied benefits. They characteristic the following:
ν Proportione
Display view for testing operation of the FireDos distant testing system. Images supplied by Author / Contributor
cian should be on-site.
Regular proportioning fee testing: Regular proportioning price testing ensures optimum functioning of the proportioner in case of a hearth. If the proportioning price is too low, the extinguishing success may be compromised. Overdosing causes the foam agent to be consumed faster than meant, leading to the untimely ending of the foam operation.
Increasing practical and failure security due to increased testing intervals: An increased test interval causes the proportioner to be examined totally automatically at shorter intervals of time. This notably reduces the risk of a failure remaining undetected for a longer time period. In addition, more frequent testing prevents the formation of deposits contained in the water motor.
Early fault detection and diagnostics: Faults within the proportioner or elements of the extinguishing system, immediately affecting the proportioner’s functionality, can be identified at an early stage of time. This consists of, for instance, pressure variations in the extinguishing water line or a jammed suction line.
Inclusion of all functions and advantages of the remote monitoring system: All features and advantages of the remote monitoring system are additionally present in the remote testing system, i.e. all related working parameters are recorded and processed constantly and correctly in addition to documented in a log file. In addition, all knowledge are displayed by a visualization.
Reduction of prices: Regular functional testing makes it potential to detect faults even earlier. This way, upkeep and repairs can take place before any extra critical harm happens. The elevated functionality and fault security of the proportioner ensures that the service life of the proportioners is maximized and the probability of a failure is minimized. As a outcome, decreased service and operating workforce on-site reduce costs considerably, particularly if the proportioner is situated in a distant place. In addition, practical testing of the proportioner permits early identification, analysis and possibly limiting a fault remotely. This makes service visits more environment friendly and due to this fact less expensive.
Summary and prospect
The distant monitoring system already provides numerous advantages and helps reduce costs, however it cannot cut back the workforce required on-site.
The remote testing system is a solution for reducing maintenance requirements. It is the subsequent evolution in the midst of creating clever FireDos proportioners.
The distant testing system allows decreasing the workforce required on-site to a minimal, together with shorter testing intervals and increased 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 important, other than an oil change. The oil change could be carried out by the operator’s personnel, too, easily and without any deeper information of the working precept of proportioners. If a service visit or repair should nonetheless turn out to be essential, remote 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 intelligent electronic upgrade. Thus, the benefits from both know-how fields are mixed without compromising the performance of mechanical FireDos proportioners.
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