Impeller characteristics of fire pumps and more common control methods
Oct 24, 2022
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Fire pumps are widely used in environmental protection, firefighting, water treatment, etc., many places will use it, in use, the impeller inside the equipment will be constantly running, the impeller is part of the pump, there are the following kinds.
1、Closed impeller
By the vane and the front and rear cover plate composition. The closed impeller is more efficient and more difficult to manufacture. It is used in the fire pump. Suitable for conveying clean water, solutions and other clean liquids with small viscosity and no particles.
2、Semi-open impeller
(1) the front half-open type: by the back cover and vane composition, this structure impeller efficiency is low, in order to improve efficiency need to be equipped with adjustable gap sealing ring.
(2) after the semi-open type: by the front cover plate and vane composition, due to the application and closed fire pump impeller the same sealing ring, efficiency and closed impeller basically the same, and vane in addition to transporting liquid, but also has a back vane or vice impeller sealing role.
3、Open impeller
Only the blade and blade reinforcement, no front and rear cover impeller. Open impeller blade number is less 2-5 pieces. Fire pump impeller efficiency is low, the application is less, mainly used for conveying high viscosity liquid and slurry liquid.
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Fire pump impeller in the pump, the use of the pump to improve the efficiency of the pump to help, in use by observing the operation of the impeller, can be used as a basis for determining whether the operation of the pump is normal.
Fire pumps are often used in the fire fighting system, it is important for fire fighting measures, but because of fire safety considerations, will often use the control cabinet, then what are the common control methods?
1, Control voltage.
During construction, the operating power voltage of the fire pump button is still connected to AC 220V.
2, Start control.
Fire pumps have three places to control the start.
(1) at the indoor fire hydrant box directly start.
(2) at the fire control room control.
(3) in the pump room near the fire pump control.
3、Fault control.
Fire control room should be able to display the fault status of fire equipment, power failure and other simple fault signals fire control can display, and other fault signals such as fire pump overload fault signal, construction in practice often avoid this point, so as not to affect the correct detection of equipment failure in the control room.
4, With a manual alarm button instead of fire hydrant button to start the pump.
The control cabinet of the fire pump has a greater role in the control of the pump, its control mode in the control cabinet control function is more obvious, with these control functions, the use of equipment more concise, safe and more efficient.
1、Closed impeller
By the vane and the front and rear cover plate composition. The closed impeller is more efficient and more difficult to manufacture. It is used in the fire pump. Suitable for conveying clean water, solutions and other clean liquids with small viscosity and no particles.
2、Semi-open impeller
(1) the front half-open type: by the back cover and vane composition, this structure impeller efficiency is low, in order to improve efficiency need to be equipped with adjustable gap sealing ring.
(2) after the semi-open type: by the front cover plate and vane composition, due to the application and closed fire pump impeller the same sealing ring, efficiency and closed impeller basically the same, and vane in addition to transporting liquid, but also has a back vane or vice impeller sealing role.
3、Open impeller
Only the blade and blade reinforcement, no front and rear cover impeller. Open impeller blade number is less 2-5 pieces. Fire pump impeller efficiency is low, the application is less, mainly used for conveying high viscosity liquid and slurry liquid.
Fire pump impeller in the pump, the use of the pump to improve the efficiency of the pump to help, in use by observing the operation of the impeller, can be used as a basis for determining whether the operation of the pump is normal.
Fire pumps are often used in the fire fighting system, it is important for fire fighting measures, but because of fire safety considerations, will often use the control cabinet, then what are the common control methods?
1, Control voltage.
During construction, the operating power voltage of the fire pump button is still connected to AC 220V.
2, Start control.
Fire pumps have three places to control the start.
(1) at the indoor fire hydrant box directly start.
(2) at the fire control room control.
(3) in the pump room near the fire pump control.
3、Fault control.
Fire control room should be able to display the fault status of fire equipment, power failure and other simple fault signals fire control can display, and other fault signals such as fire pump overload fault signal, construction in practice often avoid this point, so as not to affect the correct detection of equipment failure in the control room.
4, With a manual alarm button instead of fire hydrant button to start the pump.
The control cabinet of the fire pump has a greater role in the control of the pump, its control mode in the control cabinet control function is more obvious, with these control functions, the use of equipment more concise, safe and more efficient.
