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GEN III Smart Proportioner – remote testing system

Regular testing and maintenance guarantee a maximum service life and practical and failure-related security of technical appliances. The same applies to foam-based fire extinguishing methods and the foam proportioners installed 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 possible in a fully automated and remote-controlled manner. For instance, this would also make common upkeep personnel travel to remotely positioned proportioners redundant. In addition, this would ensure that necessities by the producer, requirements and sets of laws are observed with none functional deviations and unsuitable time intervals.
The remote testing system within the ‘Smart Proportioner’ improvement framework has been created just for this objective. 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 throughout maintenance and stay firefighting operations.
In the course of remote monitoring, the proportioning rate and other working parameters are determined, recorded and forwarded to the system operator if essential. Thus, the graceful functionality and operational readiness of the system are monitored and ensured this fashion.
A remote monitoring system consists of a control system, together with an optional native show unit (HMI) if relevant, and sensor expertise. The sensor technology includes, as a minimum, the possibility to find out the water motor’s variety of revolutions and to determine the froth agent flow fee. These values are used to calculate the proportioning fee. This figure is the core characteristic through the operation and testing of a foam proportioner. Further sensor know-how is available on an optionally available basis.
The remote monitoring system supports the working and service personnel on-site. It can additionally be appropriate for remote monitoring of the froth proportioner.
However, it’s a fundamental fact that personnel are always necessary to hold out the upkeep work or the proportioning price testing on-site as the system plays a monitoring function only. It does not actively interact with the functioning of the proportioner.
In the course of remote monitoring, the proportioning fee and different working parameters are decided, displayed and forwarded. Images supplied by Author / Contributor
Evolution – from remote monitoring to remote testing
The query is how to further decrease the maintenance effort on foam proportioners.
The resolution lies within the remote testing system, the next step of the intelligent FireDos proportioners. The remote testing system permits monitoring of the proportioner and particular person maintenance, together with proportioning rate 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 which are solely not often inspected by personnel on-site may be checked without maintenance workers and related expenses, similar to travel expenditure. In explicit, rising the testing interval is possible with out further efforts. The instruction guide for FireDos proportioners requires regular starting-up, using the service crank manually as a minimum. This is meant to stop deposits inside the tools, impairing its ease of movement and thus conserving the proportioner’s performance. The remote testing system can undertake these regular actions and test the proportioning fee, rising the service life and functional safety of the proportioner.
What is the design of a distant testing system?
The distant testing system is generally primarily based upon the distant monitoring system. It is, nonetheless, significantly prolonged by means of actuators. This is as a outcome of they permit the utterly unbiased operation of the distant testing system; i.e., the proportioning rate of the proportioner is examined without activating the water pumps of the fire extinguishing system.
The core parts embrace a central control system, with an elective HMI, sensor know-how, 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 so that the electrical drive may have no interference with the proportioner’s functionality in the case of a fire. This method, some nice benefits of the mechanical proportioning precept are preserved.
How does the distant testing system work, and the way can the proportioning rate be checked with out activating the water pumps?
If in ready-to-operate mode, the proportioner is at all times in the proportioning position. Upon initiation of an automatic testing course of, irrespective of if after an outlined time interval, upon request by way of a cloud solution or from the fireplace extinguishing system/a native operator, the proportioner is put into testing operation. Specifically, the control system places the proportioner into testing operation using an electrically actuated ball valve drive whereas the froth agent just isn’t mixed into the extinguishing water but returned to the foam agent tank. At ร้านซ่อมเครื่องวัดความดันomron , it opens the electrically actuated ball valve within the bypass line previous the water motor. Next, the electric drive of the proportioner is activated, driving the entire proportioner at its start-up move fee. The start-up move price is the lowest working point of a proportioner to achieve its nominal proportioning rate.
Due to the exterior 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 fire extinguishing system is subsequently not influenced when the proportioner is examined.
As the extinguishing water circulate price simulated by the exterior drive is also identified because of the identified ratio of the water motor’s number of revolutions and the water move price, simply the foam agent flow price should be determined to permit the subsequent calculation of the proportioning price. This is completed by a volumetric move 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 whereas proportioning in case of an alarm.
The proportioning rate is determined based on the formula as required within the standards and laws EN 13565-1, NFPA 11, FM 4-12, and the Nordtest NT Fire 042 methodology.
Foam agent move rate [l/min]
(Extinguishing water move rate x one hundred = proportioning fee %+ foam agent circulate rate) [l/min]
After completion of the testing process, the electrical drive of the proportioner stops, the bypass line is closed, and the proportioner is returned to proportioning mode.
Sensor expertise installed as a further choice or inside the electrical drive allows acquiring further data and conclusions in regards to the state and condition of the respective unit. It is checked, for example, whether or not the ball valves are of their appropriate 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 stress on the water motor are recorded. Finally, measuring the complete system’s torque and the move rate inside the bypass line allows checking the general condition of the proportioner.
The knowledge can be displayed domestically or via a cloud solution. Controlling the maintenance operation can also be potential via both interfaces.
What if there is an alarm during a testing process?
An necessary query is: Does the proportioner work without any limitations and as traditional if there is an alarm? The answer is: Yes!
The distant testing system is designed in such a way that extinguishing water can flow via the water motor and begin it up at any time, even when the electrical drive is working at the similar time. In addition, a singular, totally automated and purely mechanical decoupling mechanism ensures that the electrical drive does not interfere with the proportioner’s functioning and readiness to function.
In case of an alarm, the ball valves in 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 functions not necessary at that moment and all ball valves to be set to their correct place.
Therefore, in case of an alarm during testing operation, the ball valves change to their appropriate place totally routinely and the electrical drive is switched off. Even if the electric drive continues to be working or coming to a stop, the extinguishing water can move via the water motor and drive the proportioning pump without limitations. The alarm mode of the control system prevents re-activation of the electric drive or any unintended ball valve switching.
What benefits does a remote testing system provide?
Compared with commonplace proportioners and people geared up with a remote monitoring system, a remote testing system supplies varied advantages. They feature the next:
ν Proportione
Display view for testing operation of the FireDos remote testing system. Images supplied by Author / Contributor
cian have to be on-site.
Regular proportioning price testing: Regular proportioning price testing ensures optimum functioning of the proportioner in case of a fire. If the proportioning price is simply too low, the extinguishing success can be compromised. Overdosing causes the froth agent to be consumed sooner than meant, leading to the premature ending of the foam operation.
Increasing useful and failure safety due to increased testing intervals: An elevated take a look at interval causes the proportioner to be examined absolutely mechanically at shorter intervals of time. This notably reduces the chance of a failure remaining undetected for a longer period of time. 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, instantly affecting the proportioner’s performance, may be recognized at an early stage of time. This includes, for instance, pressure variations within the extinguishing water line or a jammed suction line.
Inclusion of all features and advantages of the remote monitoring system: All features and advantages of the remote monitoring system are additionally present in the distant testing system, i.e. all relevant operating parameters are recorded and processed repeatedly and correctly in addition to documented in a log file. In addition, all information are displayed by a visualization.
Reduction of prices: Regular functional testing makes it potential to detect faults even earlier. This way, maintenance and repairs can take place earlier than any extra severe harm happens. The increased functionality and fault safety of the proportioner ensures that the service lifetime of the proportioners is maximized and the chance of a failure is minimized. As a end result, lowered service and operating workforce on-site cut back costs significantly, particularly if the proportioner is situated in a remote place. In addition, useful testing of the proportioner permits early identification, evaluation and probably limiting a fault remotely. This makes service visits more efficient and subsequently less expensive.
Summary and prospect
The remote monitoring system already supplies varied advantages and helps cut back prices, nevertheless it cannot reduce the workforce required on-site.
The remote testing system is a solution for lowering maintenance necessities. It is the next evolution in the course of developing clever FireDos proportioners.
The remote testing system permits reducing the workforce required on-site to a minimal, together with shorter testing intervals and increased failure safety. 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, apart from an oil change. The oil change could be carried out by the operator’s personnel, too, easily and with none deeper information of the operating precept of proportioners. If a service visit or restore ought to nonetheless turn out to be needed, remote monitoring and early fault detection will make the planning and completion of such work extra efficient.
Like the distant monitoring system, the remote testing system is an optimum symbiosis of mechanical proportioners and an intelligent electronic improve. Thus, the benefits from each technology fields are combined with out compromising the performance of mechanical FireDos proportioners.
For extra info, go to www.firedos.com
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