Regular testing and maintenance ensure a most service life and useful and failure-related security of technical appliances. The similar applies to foam-based fire extinguishing systems and the froth proportioners installed in them.
Up to now, such testing and upkeep have required the presence of personnel on-site. However, it would be simpler and extra cost-efficient for extinguishing system operators if this was potential in a totally automatic and remote-controlled method. For instance, this would also make common maintenance personnel journey to remotely situated proportioners redundant. In addition, this may ensure that requirements by the manufacturer, requirements and sets of rules are noticed without any functional deviations and unsuitable time intervals.
The remote testing system throughout the ‘Smart Proportioner’ growth 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 remote monitoring system is used for proportioner monitoring in testing mode throughout upkeep and live firefighting operations.
In the course of distant monitoring, the proportioning rate and other operating parameters are decided, recorded and forwarded to the system operator if essential. Thus, the smooth functionality and operational readiness of the system are monitored and ensured this way.
A remote monitoring system consists of a management system, together with an optionally available native show unit (HMI) if applicable, and sensor technology. The sensor technology includes, as a minimum, the chance to determine the water motor’s number of revolutions and to find out the froth agent circulate fee. These values are used to calculate the proportioning fee. This determine is the core attribute during 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 repair personnel on-site. It is also suitable for distant monitoring of the froth proportioner.
However, it is a primary fact that personnel are always needed to carry out the upkeep work or the proportioning price testing on-site because the system performs a monitoring position only. It does not actively work together with the functioning of the proportioner.
In the course of remote 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 the means to additional reduce the upkeep effort on foam proportioners.
The resolution lies within the distant testing system, the following step of the intelligent FireDos proportioners. The remote testing system permits monitoring of the proportioner and particular person maintenance, including proportioning price testing.
The condition of the proportioner may be checked without having to start up the fireplace extinguishing system. No personnel are required on-site. Proportioners in a remote place or that are only not often inspected by personnel on-site may be checked without upkeep workers and related bills, such as travel expenditure. In specific, increasing the testing interval is feasible without additional efforts. The instruction guide for FireDos proportioners requires common starting-up, using the service crank manually at the least. This is meant to forestall deposits contained in the equipment, impairing its ease of movement and thus conserving the proportioner’s functionality. The distant testing system can adopt these common actions and test the proportioning rate, growing the service life and useful security of the proportioner.
What is the design of a remote testing system?
The distant testing system is generally primarily based upon the distant monitoring system. It is, nevertheless, significantly extended by means of actuators. This is because they permit the completely unbiased operation of the distant testing system; i.e., the proportioning price of the proportioner is tested with out activating the water pumps of the hearth extinguishing system.
The core parts 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 previous 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 within the case of a fire. This means, some nice benefits of the mechanical proportioning principle are preserved.
How does the remote 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 in the proportioning position. Upon initiation of an computerized testing course of, regardless of if after a defined time interval, upon request by way of a cloud solution or from the fireplace extinguishing system/a local operator, the proportioner is put into testing operation. Specifically, ราคาเกจวัดแรงดันลม puts 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 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 flow price. The start-up move rate is the lowest operating point of a proportioner to succeed in its nominal proportioning price.
Due to the exterior electrical drive, the water motor works like a pump and generates a water circulate through 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 subsequently not influenced when the proportioner is examined.
As the extinguishing water move fee simulated by the external drive can be recognized because of the identified ratio of the water motor’s number of revolutions and the water circulate price, simply the foam agent circulate rate should be determined to allow the following calculation of the proportioning price. This is done by a volumetric flow 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 circulate rate, each in testing mode and whereas proportioning in case of an alarm.
The proportioning fee is set based on the formula as required in the standards and laws EN 13565-1, NFPA 11, FM 4-12, and the Nordtest NT Fire 042 methodology.
Foam agent circulate rate [l/min]
(Extinguishing water flow rate x 100 = proportioning price %+ 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 possibility or inside the electric drive allows acquiring further info and conclusions concerning 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 strain at the water motor are recorded. Finally, measuring the whole system’s torque and the move price contained in the bypass line permits checking the final condition of the proportioner.
The knowledge may be displayed domestically or through a cloud resolution. Controlling the maintenance operation is also attainable via both interfaces.
What if there is an alarm throughout a testing process?
An important query 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 way 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 on the same time. In addition, a singular, absolutely computerized and purely mechanical decoupling mechanism ensures that the electrical drive does not intrude with the proportioner’s functioning and readiness to function.
In case of an alarm, the ball valves within 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 on 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 appropriate position.
Therefore, in case of an alarm during testing operation, the ball valves change to their right position fully routinely and the electrical drive is switched off. Even if the electrical drive continues to be running or coming to a stop, the extinguishing water can move via the water motor and drive the proportioning pump with out limitations. The alarm mode of the management 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 outfitted with a remote monitoring system, a distant testing system provides numerous benefits. They function 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 price testing: Regular proportioning fee testing ensures optimum functioning of the proportioner in case of a fire. If the proportioning rate is simply too low, the extinguishing success could be compromised. Overdosing causes the froth agent to be consumed faster than intended, leading to the premature ending of the foam operation.
Increasing useful and failure safety because of increased testing intervals: An elevated test 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, extra frequent testing prevents the formation of deposits inside the water motor.
Early fault detection and diagnostics: Faults within the proportioner or parts of the extinguishing system, immediately affecting the proportioner’s performance, may be identified 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 functions and advantages of the remote monitoring system: All functions and advantages of the distant monitoring system are additionally current within the remote testing system, i.e. all relevant operating parameters are recorded and processed constantly and correctly in addition to documented in a log file. In addition, all knowledge are displayed by a visualization.
Reduction of prices: Regular useful testing makes it attainable to detect faults even earlier. This method, maintenance and repairs can take place earlier than any more severe injury happens. The increased functionality and fault safety of the proportioner ensures that the service life of the proportioners is maximized and the probability of a failure is minimized. As a outcome, reduced service and working workforce on-site cut back prices significantly, significantly if the proportioner is located in a remote place. In addition, practical testing of the proportioner allows early identification, analysis and possibly limiting a fault remotely. This makes service visits extra environment friendly and due to this fact cheaper.
Summary and prospect
The remote monitoring system already offers numerous benefits and helps reduce costs, but it can not cut back the workforce required on-site.
The remote testing system is an answer for lowering upkeep requirements. It is the following evolution in the course of growing intelligent FireDos proportioners.
The remote testing system allows lowering the workforce required on-site to a minimal, along with shorter testing intervals and elevated failure security. This increases the proportioner’s service life.
If the proportioner is in a fault-free state, no additional upkeep by personnel on-site is important, aside from an oil change. The oil change could be carried out by the operator’s personnel, too, simply and with none deeper data of the operating principle of proportioners. If a service go to or repair ought to nonetheless turn into needed, distant monitoring and early fault detection will make the planning and completion of such work more efficient.
Like the distant monitoring system, the distant testing system is an optimum symbiosis of mechanical proportioners and an clever digital improve. Thus, the benefits from both expertise fields are mixed with out compromising the performance of mechanical FireDos proportioners.
For more info, go to