Regular testing and upkeep guarantee a maximum service life and functional and failure-related security of technical appliances. The same applies to foam-based fire extinguishing methods and the foam proportioners put in in them.
Up to now, such testing and upkeep have required the presence of personnel on-site. However, it will be easier and more cost-efficient for extinguishing system operators if this was potential in a fully computerized and remote-controlled method. For instance, this would also make common upkeep personnel journey to remotely positioned proportioners redundant. In addition, this is able to make positive that requirements by the manufacturer, requirements and units of regulations are observed without any functional deviations and unsuitable time intervals.
The distant testing system inside the ‘Smart Proportioner’ growth framework has been created only for this function. 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 maintenance and reside firefighting operations.
In the course of remote monitoring, the proportioning price and different working parameters are decided, recorded and forwarded to the system operator if needed. Thus, the graceful functionality and operational readiness of the system are monitored and ensured this fashion.
A distant monitoring system consists of a management system, including an elective native display unit (HMI) if applicable, and sensor technology. The sensor technology includes, at the least, the chance to determine the water motor’s variety of revolutions and to find out the froth agent move fee. These values are used to calculate the proportioning fee. This determine is the core characteristic through the operation and testing of a foam proportioner. Further sensor know-how is on the market on an optional foundation.
The distant monitoring system supports the working and repair personnel on-site. It can also be suitable for distant monitoring of the foam proportioner.
However, it’s a basic incontrovertible reality that personnel are all the time needed to carry out the upkeep work or the proportioning rate testing on-site as the system plays a monitoring function only. It doesn’t actively interact with the functioning of the proportioner.
In the course of distant monitoring, the proportioning fee and different working parameters are determined, displayed and forwarded. Images provided by Author / Contributor
Evolution – from distant monitoring to remote testing
The query is tips on how to further reduce the upkeep effort on foam proportioners.
The solution lies in the remote testing system, the following step of the clever FireDos proportioners. The distant testing system allows monitoring of the proportioner and individual upkeep, together with proportioning price testing.
The situation of the proportioner may be checked without having to start out up the hearth extinguishing system. No personnel are required on-site. Proportioners in a remote place or which would possibly be only not often inspected by personnel on-site can be checked without maintenance workers and associated expenses, such as travel expenditure. In specific, rising the testing interval is feasible with out extra efforts. The instruction handbook for FireDos proportioners requires regular starting-up, utilizing the service crank manually as a minimum. This is meant to forestall deposits inside the tools, impairing its ease of movement and thus conserving the proportioner’s functionality. The distant testing system can undertake these regular movements and check the proportioning rate, increasing the service life and practical security of the proportioner.
What is the design of a distant testing system?
The remote testing system is generally primarily based upon the distant monitoring system. It is, however, particularly extended by means of actuators. This is as a result of they enable the utterly independent operation of the distant testing system; i.e., the proportioning price of the proportioner is examined without activating the water pumps of the fireplace extinguishing system.
The core components include a central management 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 could have no interference with the proportioner’s functionality within the case of a hearth. This method, some great benefits of the mechanical proportioning precept are preserved.
How does the distant testing system work, and how can the proportioning fee be checked without activating the water pumps?
If in ready-to-operate mode, the proportioner is always within the proportioning place. Upon initiation of an automated testing course of, irrespective of if after an outlined time interval, upon request through a cloud resolution or from the fire extinguishing system/a native 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 while the foam agent just isn’t mixed into the extinguishing water however returned to the froth agent tank. At the identical 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 entire proportioner at its start-up flow fee. The start-up circulate price is the lowest working level 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 flow through 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 tested.
As the extinguishing water circulate rate simulated by the external drive can also be identified due to the recognized ratio of the water motor’s variety of revolutions and the water circulate price, just the froth agent circulate price must be decided to permit the next calculation of the proportioning rate. This is finished by a volumetric move meter between the proportioning pump’s outlet and the ball valve, which switches between returning and proportioning mode. This permits determination of the froth agent circulate fee, both in testing mode and while proportioning in case of an alarm.
The proportioning rate is determined in accordance with the formulation as required in the standards and regulations EN 13565-1, NFPA 11, FM 4-12, and the Nordtest NT Fire 042 technique.
Foam agent flow rate [l/min]
(Extinguishing water flow fee x one hundred = proportioning price %+ foam agent circulate 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 technology put in as an additional choice or inside the electric drive permits acquiring additional data and conclusions in regards to the state and situation of the respective unit. It is checked, for example, whether the ball valves are of their appropriate positions or adequate oil is in the crankshaft housing of the proportioning pump. In addition, the strain values at the pump inlet/outlet and the pressure at the water motor are recorded. Finally, measuring the complete system’s torque and the circulate fee inside the bypass line permits checking the overall situation of the proportioner.
The knowledge can be displayed regionally or by way of a cloud resolution. Controlling the maintenance operation can be possible via each interfaces.
What if there’s เกจวัดแรงดันราคา throughout a testing process?
An necessary question is: Does the proportioner work with none limitations and as usual if there is an alarm? The answer is: Yes!
The distant testing system is designed in such a method that extinguishing water can circulate by way of the water motor and begin it up at any time, even if the electrical drive is working on the same time. In addition, a singular, absolutely automated 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 those for switching between returning and proportioning are immediately 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 features not necessary at that second and all ball valves to be set to their correct place.
Therefore, in case of an alarm during testing operation, the ball valves swap to their right place absolutely routinely and the electric drive is switched off. Even if the electric drive is still running or coming to a stop, the extinguishing water can circulate via 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 remote testing system provide?
Compared with commonplace proportioners and people equipped with a remote monitoring system, a distant testing system provides various benefits. They feature the next:
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 fee testing: Regular proportioning rate testing ensures optimum functioning of the proportioner in case of a fireplace. If the proportioning fee is simply too low, the extinguishing success could be compromised. Overdosing causes the foam agent to be consumed faster than meant, leading to the premature ending of the froth operation.
Increasing useful and failure security due to increased testing intervals: An elevated take a look at interval causes the proportioner to be tested fully mechanically at shorter intervals of time. This notably reduces the risk 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 components of the extinguishing system, immediately affecting the proportioner’s functionality, may be recognized at an early stage of time. This includes, for instance, pressure variations in the extinguishing water line or a jammed suction line.
Inclusion of all capabilities and advantages of the remote monitoring system: All features and benefits of the distant monitoring system are additionally current in the remote testing system, i.e. all relevant working parameters are recorded and processed continuously and accurately as nicely as documented in a log file. In addition, all information are displayed by a visualization.
Reduction of costs: Regular functional testing makes it attainable to detect faults even earlier. This method, maintenance and repairs can take place before any extra severe harm occurs. The increased performance and fault security of the proportioner ensures that the service lifetime of the proportioners is maximized and the probability of a failure is minimized. As a result, lowered service and operating workforce on-site cut back costs significantly, significantly if the proportioner is positioned in a remote place. In addition, functional testing of the proportioner permits early identification, evaluation and possibly limiting a fault remotely. This makes service visits more efficient and subsequently less expensive.
Summary and prospect
The distant monitoring system already provides numerous advantages and helps cut back prices, however it can’t scale back the workforce required on-site.
The remote testing system is an answer for lowering upkeep requirements. It is the subsequent evolution in the midst of developing intelligent FireDos proportioners.
The remote testing system permits reducing the workforce required on-site to a minimum, along with shorter testing intervals and increased failure safety. This will increase 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 can be carried out by the operator’s personnel, too, easily and with none deeper data of the working principle of proportioners. If a service go to or restore should still turn into 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 clever digital improve. Thus, the advantages from both know-how fields are mixed with out compromising the performance of mechanical FireDos proportioners.
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