Supply large flow sewage pump manufacturers, large flow sewage pump prices,

Supply large flow sewage pump manufacturers, large flow sewage pump price
Our company mainly produces sewage pumps
Non-clogging sewage drainage pump flow can reach
Lift
Model description
For example
Fixed sewage and sewage submersible electric pump
Mobile sewage and sewage submersible electric pump
Water outlet diameter
Specified flow rate of the electric pump
Indicates the specified lift
Indicates rated power
An overview of sewage pumps (Tianjin Zhonglan Pump Industry Co., Ltd.) With the progress of society, the continuous improvement of people's living standards and the strengthening of environmental awareness, sewage pumps have been familiar to people, and their application range It is also becoming wider and wider.
Sewage pumps are a type of centrifugal impurities. They come in many forms, such as submersible and dry. Currently, the most common submersible type is
type submersible sewage pump. The most common dry sewage pump is such as There are two types:
type horizontal sewage pump and
type vertical sewage pump. Mainly used to transport urban sewage, feces or liquids containing fiber. For media with solid particles such as paper scraps, the temperature of the transported medium is usually not greater than
°C. Because the conveyed medium contains fibers that are easily entangled or bunched. Therefore, the flow path of this type of pump is easy to be clogged. Once the pump is clogged, the pump will not work properly or even burn the motor, resulting in poor sewage discharge. It has a serious impact on urban life and environmental protection. Therefore
blockage resistance and reliability are important factors in the quality of sewage pumps. Of course, sewage pump is just an application name. In fact, rubber-lined slurry pump is very good as a horizontal sewage pump. When treating industrial sewage, rubber-lined pumps are widely used because the sewage contains acidic or alkaline substances. According to some application cases in the stone pump industry, rubber sheaths and metal impellers are used in rubber-lined pumps, which can not only achieve the high pressure and high efficiency of metal pumps, but also give full play to the corrosion resistance of rubber materials. When treating urban sewage, a filter is usually added in front of the sewage treatment tank to block fiber entanglements in front of the suction inlet of the pump so that they cannot enter the pump chamber, so that the pump can work better and have a longer life. long.
2. The structure of the sewage pump. The sewage pump is the same as other pumps
The impeller pressure chamber is the two core components of the sewage pump. Its performance also represents the performance of the pump. The anti-clogging performance, efficiency, and cavitation performance of the sewage pump. The anti-abrasion performance is mainly guaranteed by the two major components of the vane pump and the pressurized water chamber. The following is an introduction respectively
Impeller structure type
The structure of the impeller is divided into four categories: blade type (open type and closed type), swirling flow channel type (including single flow channel and double flow channel), spiral centrifugal type Four kinds.
The open semi-open impeller is easy to manufacture. When there is a blockage in the impeller, it can be easily cleaned and repaired. However, in long-term operation, the abrasion of particles will cause a gap between the blades and the side wall of the pressurized water chamber. increase, thereby reducing efficiency. And the increase in the gap will destroy the pressure difference distribution on the blades. Not only does it produce a large amount of vortex loss, but it also increases the axial force of the pump. At the same time, due to the enlarged gap, the stability of the flow pattern of the liquid in the flow channel is destroyed, causing the pump to vibrate. This type of impeller is not easy to transport fluid containing water. For media with large particles and long fibers, this type of impeller has low efficiency in terms of performance. The maximum efficiency is approximately equivalent to that of an ordinary closed impeller, and the lift curve is relatively flat.
Swirl impeller
Pumps using this type of impeller are partially or completely retracted away from the flow path of the pressurized water chamber. Therefore, it has good non-clogging performance, strong particle passing ability and long fiber passing ability. The flow of particles in the pressurized water chamber is driven by the vortex generated by the rotation of the impeller. The suspended particles themselves do not generate energy, but only exchange energy with the liquid in the flow channel. During the flow process, suspended particles or long fibers do not come into contact with the blades. The blades will suffer less wear and tear, and there will be no increase in gaps due to abrasion. This will not cause a serious drop in efficiency in long-term operation. Using this method Pumps with impellers are suitable for pumping media containing large particles and long fibers.
In terms of performance, the efficiency of this impeller is low, only about the same as that of an ordinary closed impeller, and the lift curve is relatively flat.
Closed impeller
This type of impeller normally has higher efficiency. And the situation is relatively stable in long-term operation. The axial force of the pump using this type of impeller is small, and auxiliary blades can be installed on the front and rear cover plates. The secondary blades on the front cover can reduce the vortex loss at the impeller inlet and the wear of the sealing ring by particles. The secondary blades on the rear cover not only balance the axial force, but also prevent suspended particles from entering the mechanical seal cavity and protect the mechanical seal. However, this type of impeller has poor non-blocking properties and is easy to wind, making it unsuitable for pumping untreated sewage media containing large particles (long fibers).
Flow channel impeller
This type of impeller is a bladeless impeller. The impeller flow channel is a curved flow channel from the inlet to the outlet. Therefore, it is suitable for pumping media containing large particles and long fibers. Good blocking resistance.
In terms of performance, the high efficiency of this type of impeller is not much different from that of ordinary closed impellers, but the lift curve of the pump with this type of impeller drops steeply. The power curve is relatively stable and it is not easy to cause overpower problems. However, the cavitation performance of this type of impeller is not as good as that of ordinary closed impellers, and it is especially suitable for use in pumps with pressure inlets.
Spiral centrifugal impeller
The blades of this type of impeller are twisted spiral blades that extend axially from the suction port on the tapered hub body. This type of impeller pump has the functions of both a positive displacement pump and a centrifugal pump. When suspended particles flow through the blades, they do not hit any part of the pump, so they are non-destructive. Less destructive to conveyed objects. Due to the propelling effect of the spiral, the passage of suspended particles is strong, so the pump using this type of impeller is suitable for pumping media containing large particles and long fibers, as well as high-concentration media. It has obvious characteristics in situations where there are strict requirements on the damage of the conveying medium.
In terms of performance, this pump has a steep drop head curve and a relatively flat power curve. The most common pressure chamber used in sewage pumps with a three-pressure water chamber structure is a volute. Radial guide vanes or flow channel guide vanes are often used in built-in submersible pumps. There are three types of volute: spiral ring type and intermediate type. Spiral volutes are basically not used in sewage pumps. The annular pressurized water chamber is often used in small sewage pumps due to its simple structure and easy manufacturing. However, due to the emergence of intermediate (semi-spiral) pressurized water chambers, the application range of annular pressurized water chambers has gradually become smaller. Because the intermediate pressurized water chamber has both the high efficiency of the spiral and the high permeability of the annular pressurized water chamber. It has attracted more and more attention from manufacturers.
4. Maintenance and maintenance of sewage pump
Check whether the sewage pump pipes and joints are loose. Turn the sewage pump by hand to see if it is flexible. (
) Add bearing lubricating oil into the bearing body. Observe that the oil level should be at the center line of the oil mark. The lubricating oil should be replaced or replenished in time.
Unscrew the water diversion plug of the sewage pump body and fill it with water (or slurry). Self-priming sewage pump
Close the gate valve, outlet pressure gauge and inlet vacuum gauge of the water outlet pipe.
Jog the motor to see if the motor direction is correct
Start the motor, and when the sewage pump operates normally, open the outlet pressure gauge and the inlet vacuum pump to see if they show appropriate pressure, then gradually open the gate valve and check the motor load at the same time. Condition.
Try to control the flow rate and head of the sewage pump within the range indicated on the sign to ensure that the sewage pump operates at the highest efficiency point to achieve the greatest energy saving effect.
During the operation of the sewage pump, the bearing temperature must not exceed the ambient temperature
and the maximum temperature must not exceed
. (
) If you find any abnormal sound from the sewage pump, stop the vehicle immediately to check the cause.
When the sewage pump is to be stopped, first close the gate valve pressure gauge and then stop the motor.
(
) During the first month of operation, the lubricating oil of the sewage pump should be changed every
hour, and then every
hour. (
) Frequently adjust the packing gland to ensure that the leakage in the packing chamber is normal (it is better to keep dripping out). (
) Regularly check the wear of the shaft sleeve. If the wear is serious, replace it in time. (
) When the sewage pump is used in the cold winter season, after stopping, the drain plug at the bottom of the pump body needs to be unscrewed to drain the medium. Prevent frost cracking. (
) If the sewage pump is not used for a long time, it is necessary to disassemble the entire pump, dry the water, apply grease to the rotating parts and joints, and install it. 5. Management and maintenance of the sewage pump should be divided into two aspects: electric and mechanical. , for the machine, the main thing is to call out the previous maintenance records and compare them.
The second is the electrical aspect
It is necessary to understand the power of each pump motor and have a certain understanding of its control system.
Suitable for pumping
Liquids containing fiber or other suspended matter below ℃, used for urban industrial and mining enterprises to discharge sewage and feces, and can also pump some aquatic products, etc. If you are transporting liquids that are acidic, alkaline and contain other chemical mixtures that can cause corrosion, please specify when ordering. The factory can supply pumps assembled with anti-corrosion material pump parts.
Type is a horizontal pump
Type is a vertical pump.
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Tianjin Zhonglan Pump Industry Co., Ltd.