GEN III Smart Proportioner – distant testing system

Regular testing and upkeep ensure a maximum service life and useful and failure-related safety of technical appliances. The same applies to foam-based fire extinguishing techniques and the foam proportioners installed in them.
Up to now, such testing and maintenance have required the presence of personnel on-site. However, it would be easier and extra cost-efficient for extinguishing system operators if this was possible in a completely automated and remote-controlled manner. For example, this is able to also make regular maintenance personnel journey to remotely located proportioners redundant. In addition, this may ensure that requirements by the producer, standards and units of laws 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 function. It is an advancement of the remote monitoring system.
Brief overview of the remote monitoring system
The remote monitoring system is used for proportioner monitoring in testing mode during upkeep and reside firefighting operations.
In the course of distant monitoring, the proportioning price and different operating parameters are decided, recorded and forwarded to the system operator if needed. Thus, the graceful performance and operational readiness of the system are monitored and ensured this way.
A distant monitoring system consists of a control system, including an optionally available local display unit (HMI) if applicable, and sensor expertise. The sensor expertise includes, at the least, the chance to determine the water motor’s variety of revolutions and to determine the froth agent circulate fee. These values are used to calculate the proportioning rate. This determine is the core attribute during the operation and testing of a foam proportioner. Further sensor know-how is on the market on an elective foundation.
The remote monitoring system helps the working and repair personnel on-site. It can additionally be appropriate for remote monitoring of the foam proportioner.
However, it is a basic proven fact that personnel are always needed to hold out the maintenance work or the proportioning fee testing on-site because the system plays a monitoring role only. It does not actively interact 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 remote monitoring to remote testing
The question is tips on how to additional decrease the upkeep effort on foam proportioners.
The answer lies within the remote testing system, the next step of the clever FireDos proportioners. The remote testing system permits monitoring of the proportioner and particular person upkeep, together with proportioning price testing.
The condition of the proportioner could be checked with out having to begin up the hearth extinguishing system. No personnel are required on-site. Proportioners in a distant place or that are solely not often inspected by personnel on-site could be checked without maintenance workers and related expenses, such as journey expenditure. In particular, increasing the testing interval is possible with out further efforts. The instruction manual for FireDos proportioners requires regular starting-up, using the service crank manually at least. This is meant to stop deposits contained in the equipment, impairing its ease of movement and thus conserving the proportioner’s performance. The remote testing system can undertake these regular movements and test the proportioning price, growing the service life and functional safety of the proportioner.
What is the design of a remote testing system?
The distant testing system is usually based upon the distant monitoring system. It is, nonetheless, particularly prolonged by method of actuators. This is as a outcome of they permit the completely independent operation of the remote testing system; i.e., the proportioning fee of the proportioner is tested with out activating the water pumps of the fire extinguishing system.
The core components include a central control system, with an elective HMI, sensor technology, 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 performance within the case of a hearth. This way, the benefits of the mechanical proportioning precept are preserved.
How does the remote testing system work, and how 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 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 management system places the proportioner into testing operation using an electrically actuated ball valve drive while the foam agent is not mixed into the extinguishing water but returned to the froth agent tank. At the identical time, it opens the electrically actuated ball valve in the bypass line previous the water motor. Next, the electrical drive of the proportioner is activated, driving the complete proportioner at its start-up flow rate. The start-up move price is the bottom working point 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 flow by way of 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 fire extinguishing system is therefore not influenced when the proportioner is examined.
As the extinguishing water move price simulated by the exterior drive can be known as a result of identified ratio of the water motor’s variety of revolutions and the water flow price, simply the froth agent move price should be determined to permit the subsequent 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 determination of the froth agent circulate price, each in testing mode and whereas proportioning in case of an alarm.
The proportioning price is decided based on the formula as required within the standards and regulations EN 13565-1, NFPA eleven, FM 4-12, and the Nordtest NT Fire 042 technique.
Foam agent flow fee [l/min]
(Extinguishing water flow price x a hundred = proportioning price %+ foam agent flow 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 know-how put in as a further possibility or inside the electrical drive allows acquiring further data 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 correct positions or adequate oil is in the crankshaft housing of the proportioning pump. In addition, the pressure values at the pump inlet/outlet and the pressure at the water motor are recorded. Finally, measuring the entire system’s torque and the move price inside the bypass line allows checking the overall condition of the proportioner.
The knowledge can be displayed locally or by way of a cloud resolution. Controlling the upkeep operation is also attainable by way of both interfaces.
What if there’s an alarm during a testing process?
An necessary query is: Does the proportioner work without any limitations and as ordinary if there is an alarm? The reply is: Yes!
The distant testing system is designed in such a method 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 at the same time. In addition, a unique, fully computerized and purely mechanical decoupling mechanism ensures that the electrical drive does not intrude with the proportioner’s functioning and readiness to operate.
In case of an alarm, the ball valves in 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 features not needed at that moment and all ball valves to be set to their right position.
Therefore, in case of an alarm throughout testing operation, the ball valves change to their correct place fully routinely and the electrical drive is switched off. Even if the electric drive continues to be running or coming to a cease, the extinguishing water can circulate by way of 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 เกจ์วัดความดัน does a distant testing system provide?
Compared with standard proportioners and those equipped with a distant monitoring system, a distant testing system provides numerous advantages. They characteristic the next:
ν Proportione
Display view for testing operation of the FireDos remote testing system. Images supplied by Author / Contributor
cian should 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 meant, resulting in the premature ending of the froth operation.
Increasing useful and failure security because of increased testing intervals: An elevated test interval causes the proportioner to be tested fully 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 contained in the water motor.
Early fault detection and diagnostics: Faults in the proportioner or elements of the extinguishing system, instantly affecting the proportioner’s performance, may be identified at an early stage of time. This consists of, for instance, stress variations within the extinguishing water line or a jammed suction line.
Inclusion of all capabilities and advantages of the distant monitoring system: All functions and advantages of the distant monitoring system are also current in the remote testing system, i.e. all related working parameters are recorded and processed continuously and appropriately as nicely as documented in a log file. In addition, all data are displayed by a visualization.
Reduction of costs: Regular functional testing makes it possible to detect faults even earlier. This method, maintenance and repairs can take place earlier than any extra severe injury occurs. 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 end result, lowered service and operating workforce on-site reduce prices significantly, notably if the proportioner is located 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 subsequently cheaper.
Summary and prospect
The remote monitoring system already provides various advantages and helps reduce costs, however it cannot reduce the workforce required on-site.
The distant testing system is an answer for decreasing maintenance requirements. It is the next evolution in the midst of creating clever FireDos proportioners.
เกจวัดแรงดันถังลม allows decreasing the workforce required on-site to a minimal, together with shorter testing intervals and elevated failure security. This will increase the proportioner’s service life.
If the proportioner is in a fault-free state, no additional maintenance by personnel on-site is important, apart from an oil change. The oil change can be carried out by the operator’s personnel, too, simply and without any deeper knowledge of the operating principle of proportioners. If a service go to or repair should nonetheless become needed, remote monitoring and early fault detection will make the planning and completion of such work extra environment friendly.
Like the remote monitoring system, the distant testing system is an optimum symbiosis of mechanical proportioners and an intelligent digital upgrade. Thus, the benefits from both technology fields are combined without compromising the performance of mechanical FireDos proportioners.
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