GEN III Smart Proportioner – distant testing system

Regular testing and maintenance ensure a maximum service life and useful and failure-related security of technical appliances. The same applies to foam-based fireplace extinguishing methods and the froth proportioners installed in them.
Up to now, such testing and maintenance have required the presence of personnel on-site. However, it will be simpler and extra cost-efficient for extinguishing system operators if this was attainable in a fully computerized and remote-controlled method. For example, this would additionally make regular upkeep personnel travel to remotely located proportioners redundant. In addition, this would make certain that requirements by the producer, standards and units of regulations are observed with none practical deviations and unsuitable time intervals.
The distant testing system inside the ‘Smart Proportioner’ development framework has been created only for this purpose. It is an development of the remote 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 different operating parameters are determined, recorded and forwarded to the system operator if needed. Thus, the sleek functionality and operational readiness of the system are monitored and ensured this manner.
A remote monitoring system consists of a control system, together with an elective local display unit (HMI) if applicable, and sensor expertise. The sensor know-how consists of, as a minimum, the likelihood to find out the water motor’s number of revolutions and to find out the foam agent move fee. These values are used to calculate the proportioning fee. This figure is the core characteristic in the course of the operation and testing of a foam proportioner. Further sensor know-how is available on an elective basis.
The remote monitoring system supports the operating and service personnel on-site. It can be suitable for remote monitoring of the froth proportioner.
However, it is a primary fact that personnel are at all times essential to carry out the maintenance work or the proportioning price testing on-site as the system performs a monitoring function only. It doesn’t actively work together with the functioning of the proportioner.
In the course of distant monitoring, the proportioning rate and other operating parameters are decided, displayed and forwarded. Images supplied by Author / Contributor
Evolution – from distant monitoring to remote testing
The query is how to additional reduce the upkeep effort on foam proportioners.
The resolution lies in the distant testing system, the next step of the clever FireDos proportioners. The remote testing system allows monitoring of the proportioner and individual upkeep, including proportioning rate testing.
The situation of the proportioner can be checked without having to start out up the fire extinguishing system. No personnel are required on-site. Proportioners in a distant place or that are solely rarely inspected by personnel on-site could be checked without maintenance employees and associated bills, corresponding to journey expenditure. In specific, increasing the testing interval is feasible with out extra efforts. The instruction guide for FireDos proportioners requires common starting-up, utilizing the service crank manually at least. This is meant to stop deposits contained in the gear, impairing its ease of motion and thus conserving the proportioner’s performance. The remote testing system can undertake these common movements and take a look at the proportioning fee, rising the service life and practical safety of the proportioner.
What is the design of a remote testing system?
The remote testing system is usually based upon the remote monitoring system. It is, however, particularly prolonged by means of actuators. This is as a end result of they enable the utterly independent operation of the remote testing system; i.e., the proportioning price of the proportioner is tested without activating the water pumps of the fireplace extinguishing system.
เกจวัดแรงดันต่ำ embrace a central control 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 will have no interference with the proportioner’s functionality in the case of a fireplace. This way, some nice benefits of the mechanical proportioning principle are preserved.
How does the distant 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 at all times within the proportioning place. Upon initiation of an computerized testing process, irrespective of if after an outlined time interval, upon request through a cloud answer or from the fire extinguishing system/a native 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 while the froth agent just isn’t blended into the extinguishing water however returned to the froth 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 whole proportioner at its start-up circulate fee. The start-up move rate is the bottom working level of a proportioner to reach its nominal proportioning fee.
Due to the exterior electrical drive, the water motor works like a pump and generates a water circulate by way of the bypass from the water motor’s outlet to the water motor’s inlet. The operation causes no change of stress 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 move fee simulated by the exterior drive can additionally be recognized due to the known ratio of the water motor’s variety of revolutions and the water circulate rate, just the foam agent move fee have to be decided to allow the following calculation of the proportioning price. 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 dedication of the foam agent move rate, each in testing mode and while proportioning in case of an alarm.
The proportioning fee is decided according to the method as required within the requirements and regulations EN 13565-1, NFPA 11, FM 4-12, and the Nordtest NT Fire 042 method.
Foam agent circulate rate [l/min]
(Extinguishing water flow price x one hundred = proportioning rate %+ 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 put in as an extra option or inside the electric drive allows obtaining additional info and conclusions concerning the state and situation of the respective unit. It is checked, for instance, whether the ball valves are of their right positions or enough oil is within the crankshaft housing of the proportioning pump. In addition, the strain values at the pump inlet/outlet and the strain at the water motor are recorded. Finally, measuring the entire system’s torque and the move price contained in the bypass line permits checking the overall condition of the proportioner.
The data could be displayed domestically or via a cloud resolution. Controlling the maintenance operation is also attainable by way of each interfaces.
What if there’s an alarm during a testing process?
An essential question is: Does the proportioner work without any limitations and as ordinary if there is an alarm? The answer is: Yes!
The remote 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 when the electrical drive is working at the similar time. In addition, a novel, totally computerized and purely mechanical decoupling mechanism ensures that the electrical drive doesn’t interfere with the proportioner’s functioning and readiness to function.
In case of an alarm, the ball valves in the bypass line and people for switching between returning and proportioning are instantly switched so 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 capabilities not needed 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 swap to their correct place totally automatically and the electrical drive is switched off. Even if the electrical drive remains to be working or coming to a stop, the extinguishing water can move by way of the water motor and drive the proportioning pump with out limitations. The alarm mode of the control system prevents re-activation of the electrical drive or any unintended ball valve switching.
What advantages does a distant testing system provide?
Compared with commonplace proportioners and people geared up with a distant monitoring system, a remote testing system provides numerous benefits. They feature the following:
ν Proportione
Display view for testing operation of the FireDos remote testing system. Images provided by Author / Contributor
cian should be on-site.
Regular proportioning price testing: Regular proportioning price testing ensures optimum functioning of the proportioner in case of a hearth. If the proportioning fee is too low, the extinguishing success can be compromised. Overdosing causes the foam agent to be consumed quicker than intended, leading to the untimely ending of the foam operation.
Increasing useful and failure safety because of elevated testing intervals: An elevated check interval causes the proportioner to be tested fully routinely 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 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, could be recognized at an early stage of time. This includes, for example, stress variations in the extinguishing water line or a jammed suction line.
Inclusion of all capabilities and benefits of the remote monitoring system: All capabilities and advantages of the distant monitoring system are also present within the distant testing system, i.e. all relevant operating parameters are recorded and processed repeatedly and accurately in addition to documented in a log file. In addition, all data are displayed by a visualization.
Reduction of costs: Regular functional testing makes it attainable to detect faults even earlier. This way, maintenance and repairs can happen before any extra serious injury occurs. The elevated performance and fault security of the proportioner ensures that the service life of the proportioners is maximized and the chance of a failure is minimized. As a end result, decreased service and operating workforce on-site reduce costs significantly, particularly if the proportioner is situated in a distant place. In addition, useful testing of the proportioner allows early identification, evaluation and possibly limiting a fault remotely. This makes service visits extra efficient and therefore less expensive.
Summary and prospect
The remote monitoring system already provides numerous benefits and helps cut back costs, nevertheless it can’t scale back the workforce required on-site.
The distant testing system is a solution for lowering upkeep requirements. It is the next evolution in the midst of creating intelligent FireDos proportioners.
The remote testing system permits reducing the workforce required on-site to a minimum, 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 critical, other than an oil change. The oil change could be carried out by the operator’s personnel, too, easily and without any deeper knowledge of the working precept of proportioners. If a service go to or restore should still become essential, distant monitoring and early fault detection will make the planning and completion of such work more efficient.
Like the remote monitoring system, the remote testing system is an optimum symbiosis of mechanical proportioners and an intelligent digital improve. Thus, the benefits from both expertise fields are mixed without compromising the performance of mechanical FireDos proportioners.
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