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บทความ เกจวัดแรงดัน

GEN III Smart Proportioner – remote testing system

Regular testing and upkeep guarantee a most service life and functional and failure-related safety of technical home equipment. The similar applies to foam-based fire extinguishing methods and the froth proportioners put in in them.
Up to now, such testing and maintenance 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 completely computerized and remote-controlled method. For instance, this is in a position to also make common maintenance personnel travel to remotely situated proportioners redundant. In addition, this may ensure that requirements by the producer, requirements and sets of regulations are observed with none functional deviations and unsuitable time intervals.
The distant testing system inside the ‘Smart Proportioner’ development framework has been created only for this objective. It is an development of the remote monitoring system.
differential pressure gauge ราคา of the remote monitoring system
The distant 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 determined, recorded and forwarded to the system operator if necessary. Thus, the graceful performance and operational readiness of the system are monitored and ensured this way.
A distant monitoring system consists of a management system, together with an optional local show unit (HMI) if applicable, and sensor expertise. The sensor know-how includes, at the least, the chance to discover out the water motor’s number of revolutions and to discover out the froth agent move price. These values are used to calculate the proportioning fee. This determine is the core attribute in the course of the operation and testing of a foam proportioner. Further sensor expertise is out there on an optionally available foundation.
The distant monitoring system supports the working and service personnel on-site. It can be appropriate for remote monitoring of the foam proportioner.
However, it is a primary incontrovertible reality that personnel are at all times needed to carry out the upkeep work or the proportioning price testing on-site as the system performs a monitoring function only. It doesn’t actively interact with the functioning of the proportioner.
In the course of remote monitoring, the proportioning fee and different operating parameters are determined, displayed and forwarded. Images supplied by Author / Contributor
Evolution – from remote monitoring to remote testing
The question is how to additional reduce the upkeep effort on foam proportioners.
The solution lies within the distant testing system, the following step of the intelligent FireDos proportioners. The distant testing system allows monitoring of the proportioner and individual upkeep, including proportioning rate testing.
The condition of the proportioner can be checked without having to start out up the hearth extinguishing system. No personnel are required on-site. Proportioners in a distant place or which may be only rarely inspected by personnel on-site may be checked without maintenance workers and related expenses, similar to travel expenditure. In explicit, rising the testing interval is possible with out further efforts. The instruction manual for FireDos proportioners requires common starting-up, utilizing the service crank manually as a minimum. This is meant to forestall deposits contained in the tools, impairing its ease of movement and thus conserving the proportioner’s performance. The distant testing system can adopt these common movements and test the proportioning price, growing the service life and useful security of the proportioner.
What is the design of a distant testing system?
The distant testing system is generally based mostly upon the remote monitoring system. It is, nonetheless, notably 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 rate of the proportioner is examined with out activating the water pumps of the hearth extinguishing system.
The core parts 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 previous the water motor.
The connection of the electrical drive and the proportioner is designed so that the electrical drive will have no interference with the proportioner’s performance in the case of a fireplace. This method, some nice benefits of the mechanical proportioning precept 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 within the proportioning position. Upon initiation of an computerized testing course of, irrespective of if after a defined time interval, upon request by way of a cloud resolution or from the fire extinguishing system/a local operator, the proportioner is put into testing operation. Specifically, the management system puts the proportioner into testing operation using an electrically actuated ball valve drive whereas the foam agent isn’t blended into the extinguishing water but returned to the froth agent tank. At the same 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 entire proportioner at its start-up flow rate. The start-up circulate price is the lowest working level of a proportioner to succeed in its nominal proportioning price.
Due to the external 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 pressure within the extinguishing water line. The fire extinguishing system is subsequently not influenced when the proportioner is tested.
As the extinguishing water flow fee simulated by the exterior drive can be known because of the identified ratio of the water motor’s variety of revolutions and the water circulate rate, just the foam agent move rate should be decided to permit the next 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 permits determination of the froth agent flow rate, both in testing mode and whereas proportioning in case of an alarm.
The proportioning rate is decided based on the formula as required in the standards and regulations EN 13565-1, NFPA eleven, FM 4-12, and the Nordtest NT Fire 042 technique.
Foam agent flow rate [l/min]
(Extinguishing water flow price x one hundred = proportioning fee %+ foam agent flow 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 know-how installed as a further possibility or inside the electrical drive permits obtaining further information and conclusions about the state and condition of the respective unit. It is checked, for example, whether the ball valves are of their correct positions or enough oil is in the crankshaft housing of the proportioning pump. In addition, the stress values on the pump inlet/outlet and the stress on the water motor are recorded. Finally, measuring the whole system’s torque and the circulate rate contained in the bypass line permits checking the overall situation of the proportioner.
The knowledge may be displayed regionally or through a cloud solution. Controlling the upkeep operation can also be attainable through both interfaces.
What if there is an alarm during a testing process?
An essential query is: Does the proportioner work with none limitations and as ordinary if there is an alarm? The reply is: Yes!
The remote testing system is designed in such a means that extinguishing water can circulate through the water motor and start it up at any time, even if the electrical drive is working at the same time. In addition, a singular, fully automatic and purely mechanical decoupling mechanism ensures that the electrical drive does not intervene with the proportioner’s functioning and readiness to operate.
In case of an alarm, the ball valves within the bypass line and those for switching between returning and proportioning are instantly switched so 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 functions not needed at that second and all ball valves to be set to their correct position.
Therefore, in case of an alarm during testing operation, the ball valves change to their right place absolutely mechanically and the electrical drive is switched off. Even if the electric drive remains to be running 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 remote testing system provide?
Compared with standard proportioners and people geared up with a remote monitoring system, a remote testing system provides varied benefits. They feature the next:
ν Proportione
Display view for testing operation of the FireDos remote 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 fireplace. If the proportioning price is simply too low, the extinguishing success can be compromised. Overdosing causes the foam agent to be consumed faster than intended, resulting in the untimely ending of the foam operation.
Increasing functional and failure safety because of elevated testing intervals: An increased 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 period. 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 performance, may be recognized 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 functions and benefits of the distant monitoring system: All capabilities and advantages of the remote monitoring system are additionally current within the distant testing system, i.e. all related working parameters are recorded and processed constantly and accurately as well as documented in a log file. In addition, all knowledge are displayed by a visualization.
Reduction of costs: Regular practical testing makes it possible to detect faults even earlier. This means, maintenance and repairs can happen before any extra serious damage happens. The increased functionality and fault safety of the proportioner ensures that the service lifetime 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 considerably, particularly if the proportioner is located in a distant place. In addition, functional testing of the proportioner permits early identification, analysis and possibly limiting a fault remotely. This makes service visits more environment friendly and due to this fact more cost-effective.
Summary and prospect
The distant monitoring system already offers varied advantages and helps cut back prices, nevertheless it can not scale back the workforce required on-site.
The remote testing system is a solution for decreasing upkeep requirements. It is the next evolution in the midst of growing intelligent FireDos proportioners.
The distant testing system permits lowering the workforce required on-site to a minimal, along 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, aside from an oil change. The oil change could be carried out by the operator’s personnel, too, simply and with none deeper knowledge of the operating precept of proportioners. If a service go to or restore ought to 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 clever digital improve. Thus, the benefits from each expertise fields are mixed without compromising the performance of mechanical FireDos proportioners.
For more info, go to www.firedos.com
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