Fire pumps, water ring pumps When the working wheel rotates in the pump body, a water ring and a working chamber are formed. The water ring and the working wheel form a crescent-shaped space. The volume of the half crescent on the right becomes larger from small to form the suction chamber. The volume of the half crescent on the left changes from large to small, forming a compression process (equivalent to an exhaust chamber). The pumped gas enters the suction chamber through the intake pipe and the intake port. Further rotation of the rotor causes the gas to be compressed and discharged through the exhaust port and the exhaust pipe. Exhausted gas and water droplets enter the water tank through the exhaust pipe, at this time the gas is separated from the water, the gas is discharged into the atmosphere through the pipe, and the water enters the pump from the water tank, or is discharged into the drainage device through the pipeline 11.

The compression ratio of the fire pump and the water ring pump is determined by the end position of the suction port of the pump and the start position of the exhaust port. Because the end position of the suction port determines the volume of the inhaled gas in the suction chamber; and the start position of the exhaust port determines the volume of compressed gas during exhaust. For the water ring pump whose structural size has been determined, its compression ratio can be obtained.

As the name implies, fire pumps are used in firefighting. They are divided into different types according to different classification methods. They are widely used in environmental protection, water treatment, firefighting and other departments to pump various liquids due to their fully sealed, leak-free, and corrosion-resistant characteristics. , It is the ideal pump for creating leak-free, pollution-free civilized workshops and civilized factories.



Selection of fire pump

The basis for the selection of fire pumps should be based on the process flow, water supply and drainage requirements, and be considered from five aspects, namely, liquid delivery volume, device lift, liquid properties, pipeline layout, and operating conditions. Fire pumps are mainly divided into vertical and horizontal types. The flow rate of the conveying liquid is one of the important performance data for pump selection. It is directly related to the production capacity of the entire device. The working conditions of the fire pump: flow rate: 2～1400m3/h, Head: 5～130m, maximum working pressure of the system: ≤1.6MPa, working temperature: -15℃～+80℃.



Main purpose of fire pump

With its full seal, no leakage, and corrosion resistance, it is widely used in environmental protection, water treatment, fire protection and other departments to pump various liquids. It is an ideal pump for building non-leakage, non-pollution civilized workshops and civilized factories.

The unpainted surface of the pump that has not been installed should be coated with a suitable anti-rust agent. Bearings lubricated with oil should be filled with a suitable oil. Bearings lubricated with grease should only be filled with a grease, do not use Mix grease.

Pump clean liquid for a short time, rinse, suction line, discharge line, pump casing and impeller, and drain flushing fluid in pump casing, suction line and discharge line.

Drain the oil from the bearing housing, refill with clean oil, thoroughly clean the grease and refill with new grease.

Seal the suction port and discharge port, store the pump in a clean, dry place, protect the motor windings from moisture, and spray the inside of the pump casing with anti-rust and anti-corrosion liquid.

Rotate the pump shaft once a month to avoid freezing and lubricate the bearings.

After the centrifugal pump stops running, the inlet valve of the pump should be closed, and the valves of the auxiliary system should be closed in turn after the pump cools down.

High-temperature pump parking should be carried out in accordance with the provisions of the equipment technical documents. After parking, it should be cranked for half a circle every 20 to 30 minutes until the temperature of the pump body drops to 50°C.

When the cryogenic pump is stopped, the pump should always be filled with liquid unless there are special requirements; the suction valve and discharge valve should be kept open; for cryogenic pumps with double-end mechanical seals, the liquid level controller and the sealing liquid in the pump seal chamber should be Maintain pump grout pressure.

For pumps transporting media that are prone to crystallization, solidification, and precipitation, prevent blockage after stopping the pump, and flush the pump and pipeline with clean water or other media in time.

Drain the liquid accumulated in the pump to prevent rust and frost cracking.

The failure or damage of equipment is often caused by the damage of wearing parts. Fire pumps also have wearing parts. We need to pay special attention during use and maintenance. Regular replacement and inspection are very necessary. So what are the wearing parts of a fire pump? What should we pay attention to when using it?

1. Pump casing. The water pump is affected by mechanical force or thermal stress during operation, and it is prone to cracks and cavitation. In the severe cold winter, if the water in the pump casing is not released, it may freeze and rupture.
2. Pump shaft. Improper use or installation of the pump shaft of the water pump may easily cause cracks, breakage, bending, journal wear, and thread damage.
3. The impeller. The impeller is thinned or eccentrically worn due to the formation of pockets or perforations due to cavitation, and the severely eroded impeller will be crushed by debris and needs to be repaired or replaced as appropriate.
4. Sliding bearings. The bearing bush of the sliding bearing is generally made of copper tin alloy, which has poor wear resistance and is easy to wear and burn out. The average service life under normal use and maintenance is 5000 hours.
5. Mouth ring. Also known as anti-friction ring or anti-leakage, it is also one of the parts that are easier to wear in fire pumps. After wear, it can be repaired or replaced by turning.
6. Filling. If used for a long time, it will harden, causing the water pump to leak air and water, just replace it with a new packing.
7. Water pump oil seal. The oil seal is made of rubber, which is easy to age and wear.

Fire pump bearings are one of the common parts in mechanical equipment all over the world. Of course, the common fire pumps outside also contain bearings, and they play a very important role. There is also a lot of professional knowledge about bearings. The following zjbetter will share with you about the fire pump rolling shaft.

Fire pumps are a type of pump used in fire protection. Compared with ordinary water pumps, fire pumps have higher standards and requirements in terms of sealing, corrosion resistance, and operating efficiency. Before the fire pump equipment runs, we need to discharge the gas in the water pump, do you know what is the meaning of this? The following is the answer from Shanghai Xizhiquan for you.


1. If there is gas in the fire pump, the equipment cannot form a sufficient vacuum during operation, resulting in the inability of the liquid to be sucked up. This phenomenon is called air binding, and many operators do not understand this operation often a phenomenon that would result.
2. By understanding the causes of qi binding, we will understand how to avoid this problem. Before starting the fire pump equipment, the pump casing needs to be filled with liquid. A check valve should be installed at the suction pipe of the pump, which can effectively prevent the liquid in the pump from flowing into the low-level tank due to gravity. If the pump is located at a low position, there is no need to prime the pump.
3. The compressed gas in the fire pump will occupy a certain space in the fire pump, making it impossible to seal.

Therefore, the deflation operation of the fire pump before it is put into use can increase the vacuum degree of the equipment and increase the pumping capacity of the pump, thereby effectively improving the efficiency of the equipment and reducing waste of resources.

As we all know, when a fire breaks out, the circuit is very prone to open circuit. When the fire fighting equipment relies on the power source as the power source, it cannot start the equipment, so it cannot play the role of fire fighting. At this time, the power source of the fire pump equipment is considered by people. a big problem. In fire fighting equipment, what power source is really reliable and guaranteed? Zjbetter, who has 19 years of experience in fire pump production, would like to introduce to you the following about our company's diesel engine fire pump set XBC-D equipment.

This set of fire pump set is a complete set of consumer water supply equipment composed of X6135, 4102, 12V135, 4105, 6102 series diesel engines as the power source, and equipped with diesel tanks, control panels, fans, cooling water tanks and other components.

The equipment has the characteristics of complete functions, stable performance, good starting characteristics, compact structure, strong overload capacity, easy operation and maintenance, automation, etc. It can be connected with automatic alarm device or fire center, and can also realize automatic start, automatic protection, automatic preheating, Automatic switching (diesel engine pump set, electric pump set) and other functions.

The pump station can be equipped with two power sources, diesel engine and electric motor. Generally, the electric pump is set as the main pump, and the diesel engine pump is set as the backup pump. It will start automatically when there is no power supply for firefighting. Among the two water intake methods of fire pump self-priming and suction, due to the requirements of fire protection regulations, the pump unit generally adopts the self-priming water diversion method. But it can also be changed according to user needs.