GEN III Smart Proportioner – remote testing system

Regular testing and upkeep ensure a maximum service life and useful and failure-related security of technical appliances. The similar applies to foam-based fire extinguishing techniques 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 would be simpler and more cost-efficient for extinguishing system operators if this was attainable in a totally automatic and remote-controlled method. For instance, this would also make regular maintenance personnel travel to remotely located proportioners redundant. In addition, this may ensure that requirements by the producer, standards and sets of regulations are noticed with none useful deviations and unsuitable time intervals.
The distant 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 distant monitoring system is used for proportioner monitoring in testing mode throughout maintenance and reside firefighting operations.
In the course of remote monitoring, the proportioning fee and different working 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 manner.
A remote monitoring system consists of a management system, together with an optional local show unit (HMI) if relevant, and sensor know-how. เกจวัดแรงดันไทวัสดุ contains, at least, the chance to determine the water motor’s number of revolutions and to determine the froth agent move price. These values are used to calculate the proportioning price. This figure is the core attribute through the operation and testing of a foam proportioner. Further sensor know-how is available on an optional foundation.
The remote monitoring system helps the operating and repair personnel on-site. It can be appropriate for distant monitoring of the foam proportioner.
However, it’s a basic fact that personnel are all the time needed to carry out the maintenance work or the proportioning fee testing on-site because the system performs a monitoring function solely. It does not actively interact with the functioning of the proportioner.
In the course of distant monitoring, the proportioning price and other working parameters are determined, displayed and forwarded. Images equipped by Author / Contributor
Evolution – from distant monitoring to remote testing
The question is how to additional reduce the upkeep effort on foam proportioners.
The answer lies within the remote testing system, the next step of the intelligent FireDos proportioners. The distant testing system permits monitoring of the proportioner and individual upkeep, together with proportioning rate testing.
The condition of the proportioner can be checked with out having to begin up the fireplace extinguishing system. No personnel are required on-site. Proportioners in a remote place or which are solely hardly ever inspected by personnel on-site may be checked without upkeep employees and associated expenses, such as travel expenditure. In particular, increasing the testing interval is feasible without additional efforts. The instruction handbook for FireDos proportioners requires regular starting-up, using the service crank manually as a minimum. This is intended to prevent deposits inside the tools, impairing its ease of movement and thus conserving the proportioner’s performance. The remote testing system can adopt these common actions and check the proportioning price, growing the service life and practical security of the proportioner.
What is the design of a remote testing system?
The remote testing system is usually primarily based upon the distant monitoring system. It is, however, particularly prolonged by means of actuators. This is as a result of they permit the utterly unbiased operation of the remote testing system; i.e., the proportioning price of the proportioner is tested without activating the water pumps of the fire extinguishing system.
The core parts include a central control 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 in order that the electrical drive may have no interference with the proportioner’s performance within the case of a hearth. This method, some great advantages of the mechanical proportioning precept are preserved.
How does the remote testing system work, and the way can the proportioning fee be checked with out activating the water pumps?
If in ready-to-operate mode, the proportioner is all the time in the proportioning position. Upon initiation of an automated testing course of, irrespective of if after a defined time interval, upon request by way of a cloud answer or from the hearth extinguishing system/a local operator, the proportioner is put into testing operation. Specifically, the control system puts the proportioner into testing operation using an electrically actuated ball valve drive whereas the foam agent just isn’t mixed into the extinguishing water but 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 electric drive of the proportioner is activated, driving the entire proportioner at its start-up move fee. The start-up flow price is the bottom operating level of a proportioner to succeed in its nominal proportioning fee.
Due to the exterior electrical drive, the water motor works like a pump and generates a water move through the bypass from the water motor’s outlet to the water motor’s inlet. The operation causes no change of stress within the extinguishing water line. The fire extinguishing system is due to this fact not influenced when the proportioner is tested.
As the extinguishing water circulate fee simulated by the external drive can be recognized because of the known ratio of the water motor’s variety of revolutions and the water flow fee, just the froth agent circulate fee must be decided to allow the subsequent 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 permits dedication of the foam agent flow fee, both in testing mode and while proportioning in case of an alarm.
The proportioning fee is set based on the formulation as required in the standards and rules EN 13565-1, NFPA 11, FM 4-12, and the Nordtest NT Fire 042 method.
Foam agent flow rate [l/min]
(Extinguishing water circulate rate x 100 = proportioning fee %+ foam agent move 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 technology installed as an extra option or inside the electrical drive permits acquiring further info and conclusions in regards to the state and situation of the respective unit. It is checked, for instance, whether the ball valves are in their appropriate positions or adequate oil is in the crankshaft housing of the proportioning pump. In addition, the stress values on the pump inlet/outlet and the stress at the water motor are recorded. Finally, measuring the complete system’s torque and the move rate contained in the bypass line allows checking the general situation of the proportioner.
The information may be displayed locally or via a cloud solution. Controlling the maintenance operation is also attainable via both interfaces.
What if there could be an alarm throughout a testing process?
An important question is: Does the proportioner work without any limitations and as traditional if there’s an alarm? The reply is: Yes!
The distant testing system is designed in such a means that extinguishing water can flow through the water motor and start it up at any time, even when the electrical drive is working at the same time. In addition, a unique, fully automatic and purely mechanical decoupling mechanism ensures that the electrical drive doesn’t intervene 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 instantly switched in order that the proportioner is in proportioning mode for firefighting. Thus, the control system is put into alarm mode on this case. This alarm mode causes the disabling of all features not necessary at that second and all ball valves to be set to their correct place.
Therefore, in case of an alarm throughout testing operation, the ball valves swap to their appropriate place totally routinely and the electric drive is switched off. Even if the electric drive remains to be running or coming to a stop, the extinguishing water can circulate through the water motor and drive the proportioning pump without limitations. The alarm mode of the control system prevents re-activation of the electrical drive or any unintended ball valve switching.
What benefits does a remote testing system provide?
Compared with standard proportioners and people outfitted with a distant monitoring system, a distant testing system provides various advantages. They characteristic the next:
ν Proportione
Display view for testing operation of the FireDos distant testing system. Images supplied by Author / Contributor
cian have to be on-site.
Regular proportioning rate testing: Regular proportioning price testing ensures optimum functioning of the proportioner in case of a hearth. If the proportioning fee is simply too low, the extinguishing success may be compromised. Overdosing causes the foam agent to be consumed quicker than intended, resulting in the premature ending of the froth operation.
Increasing practical and failure safety as a end result of elevated testing intervals: An elevated check interval causes the proportioner to be examined totally routinely at shorter intervals of time. This notably reduces the chance of a failure remaining undetected for an extended period of time. In addition, extra frequent testing prevents the formation of deposits inside the water motor.
Early fault detection and diagnostics: Faults in the proportioner or elements of the extinguishing system, instantly affecting the proportioner’s functionality, can be identified at an early stage of time. This consists of, for example, strain variations in the extinguishing water line or a jammed suction line.
Inclusion of all functions and advantages of the remote monitoring system: All functions and benefits of the remote monitoring system are also present within the remote testing system, i.e. all related operating parameters are recorded and processed continuously and appropriately as well as documented in a log file. In addition, all data are displayed by a visualization.
Reduction of prices: Regular practical testing makes it attainable to detect faults even earlier. This means, maintenance and repairs can take place earlier than any extra serious harm happens. The increased functionality and fault security of the proportioner ensures that the service life of the proportioners is maximized and the likelihood of a failure is minimized. As a outcome, decreased service and operating workforce on-site cut back prices considerably, significantly if the proportioner is positioned in a distant place. In addition, functional testing of the proportioner permits early identification, evaluation and probably limiting a fault remotely. This makes service visits more efficient and due to this fact cheaper.
Summary and prospect
The remote monitoring system already provides numerous benefits and helps reduce prices, however it can’t scale back the workforce required on-site.
The remote testing system is a solution for lowering upkeep requirements. It is the following evolution in the center of growing intelligent FireDos proportioners.
The remote testing system allows reducing the workforce required on-site to a minimum, 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 may be carried out by the operator’s personnel, too, easily and with none deeper data of the working principle of proportioners. If a service visit or restore should still turn out to be needed, distant monitoring and early fault detection will make the planning and completion of such work extra environment friendly.
Like the distant monitoring system, the distant testing system is an optimum symbiosis of mechanical proportioners and an clever electronic upgrade. Thus, the advantages from both technology fields are mixed with out compromising the performance of mechanical FireDos proportioners.
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