1, lack of traffic Causes: the impact of pump flow is less than the suction pipe leaks, the bottom valve leakage; inlet blockage; bottom valve into the water depth is not enough; pump speed is too low; seal ring or impeller wear too large; Treatment method: Check the suction pipe and the bottom valve, block the leakage source; clean the silt or plug at the inlet; bottom valve into the water depth must be greater than 1.5 times the diameter of the inlet pipe to increase the depth of the bottom valve into the water; check the power supply voltage, Increase the pump speed, replace the seal ring or impeller; reduce the installation location of the pump, or replace the high-lift pump. 2, power consumption is too large Reason: The pump speed is too high; pump spindle bending or pump spindle and motor spindle is not concentric or not parallel; selection of pump head is not appropriate; pump suction sediment or plug; motor ball bearings damaged. Treatment: Check the circuit voltage, reduce the pump speed; Correction of the pump spindle or adjust the relative position of the pump and the motor; Use the appropriate lift pump; Clean up the sediment or plug; Replace the motor ball bearings. 3, the pump vibration or vibration Causes: Pump installation is not strong or the pump is installed too high; Motor ball bearings damaged; Pump spindle bending or not with the motor spindle, not parallel and so on. Treatment: install a steady pump or reduce the installation height of the pump; replace the motor ball bearings; correct the bending of the pump shaft or adjust the relative position of the pump and the motor. 4, drive shaft or motor bearing overheating Reason: lack of oil or bearing rupture. Approach: add oil or replace the bearing. 5, the pump does not water Reason: pump and suction pipe did not fill the diversion; moving water level lower than the pump drainage pipe; suction pipe rupture. Approach: Exclude the end of the valve failure, filled with diversion; reduce the pump installation location, so that the filter under the water level, or wait for the water level up the filter pipe and then pumping; repair or replace the suction pipe. Sewage pump basic knowledge and introduction of classification of the impeller Sewage pump is a non-clogging pump, with many forms: such as submersible and dry two, the most common submersible WQ submersible sewage pump, the most common dry sewage pumps such as W-type horizontal sewage Pump and WL vertical sewage pump two. Mainly used to transport urban sewage, manure or liquid containing fiber. Paper and other solid particles of media, the medium is usually the temperature is not more than 80 ℃. Due to the media being conveyed contain easily entangled or bunched fibers. Therefore, the kind of pump flow channel is easy to block, once the pump is blocked, the pump can not work normally, or even burn the motor, resulting in poor drainage. To urban life and environmental protection have a serious impact. Therefore, the anti-clogging and reliability of the sewage pump is an important factor in the pros and cons. Like other pumps, impellers and pressurized water chambers are the two core components of a sewage pump. The merits of its performance, also on behalf of the pros and cons of pump performance, sewage pump anti-clogging performance, the level of efficiency, as well as cavitation performance, anti-erosion performance mainly by the leaf pump and pressurized water chamber to ensure that the two major components. Here are an introduction: 1, the structure of the impeller: impeller structure is divided into four categories: leaf type (open, closed), cyclone, runner type (including single and double runner) spiral centrifugal four, open Semi-open impeller manufacturing convenience, when the impeller caused by blockage, it can be very easy to clean and repair, but in the long run, under the erosion of the particles will make the blade and the pressure chamber inside the wall of the gap increases, so that the efficiency reduce. And the increase of clearance will destroy the pressure distribution on the blade. Not only produces a large amount of vortex loss, but also increases the axial force of the pump. At the same time, due to the increased clearance, the stability of the liquid state in the flow passage is destroyed, causing the pump to vibrate. This impeller is not easy to transport Large particles and long fiber media, from the performance point of view, the low efficiency of the impeller type, the highest efficiency of about 92% of ordinary closed impeller, lift curve is relatively flat. 2, swirl impeller: The type of impeller pump, as part or all of the impeller shrinking pressure water chamber runner. So no blockage performance is good, through the ability of particles and the ability of long fibers through. Particles flow 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 and only exchange energy with the liquid in the flow channel. In the process of flow, suspended particles or long fibers are not in contact with the blade, the blade is more wear and tear less, there is no increase in the gap due to abrasion, long-term operation will not cause a serious decline in efficiency, the use of the Type impeller pumps are suitable for pumping media containing large particles and long fibers. From the performance point of view, the impeller efficiency is low, equivalent to only about 70% of ordinary closed impeller, lift curve is relatively flat. 3, Closed impeller: This type of impeller is more efficient. And in the long run the situation is more stable, the use of the type of impeller pump axial force is small, and can be set in the front and rear cover Vice blades. The auxiliary vanes on the front cover reduce vortex loss at the impeller inlet and wear of the seal ring by the particles. The auxiliary blades on the rear cover not only act to balance the axial forces but also prevent the suspended particles from entering the mechanical seal chamber to protect the mechanical seal. However, the impeller of this type has poor non-blocking property and is easy to wind, so it is not suitable for pumping the untreated sewage medium containing large particles (long fibers). 4, runner-type impeller: This type of impeller bladeless impeller, impeller runner is a from inlet to outlet of a curved runner. It is suitable for pumping medium containing large particles and long fibers. Good anti-blocking. From the performance point of view, the type of high efficiency impeller and ordinary closed impeller or less, but the type of impeller pump head curve is steep drop. The power curve is relatively stable, not easy to produce super power problems, but this type of impeller cavitation performance than ordinary closed impeller, especially suitable for pressure on the pump. 5, Spiral Centrifugal Impeller: This type of impeller blades for the twisted helical blades in the tapered hub body axially extending from the suction port. This type of impeller pump also has the role of volumetric pumps and centrifugal pumps, suspended particles flow in the leaves, do not hit any part of the pump, so good non-destructive. Destructive on the transport of small objects. Due to the helical propulsion and the high permeability of the suspended particles, pumps using this type of impeller are suitable for pumping media containing large particles and long fibers, as well as highly concentrated media. In the transport of media destruction has strict requirements of the occasion has obvious characteristics.
Rectangular Pipe pipe diveded into seamless and weld ,Producing method: Hot rolled or cold formed. seamless square tube is made of seamless tube extrusion process can also be processed through the strip roll is made.Usage industry: Structure pipe in constructions, making machinery and shipping building ,bridge building And so on.
Rectangular Pipe,Rectangular Steel Tubing ,Aluminum Rectangular Tubing,Steel Rectangular Tubing CANGZHOU HAOYUAN PIPE FITTINGS MFG CO.,LTD , https://www.pipefitting-china.com
Product:Rectangular Pipe
Size:DN10-DN2500
Materials: Q235B,Q345B,A53-B,A106-B,API5L-B,A106-C,A333-3,A312,ST37/35/52....
Thickness: 2mm-100mm.
Standard:GB6728-2002,JISG3466-88,DIN17100/17123,EN10210-1,BS4360....
Crafts: Rolling, Extrusion, Welding.
Connection: Welding.
Package: Paint, Anti-rust oil, Canvas Packaging, According to customer requirements.
Brand Name: HY
Place of Origin: China (Mainland)
Certification: API 5L.ISO.UKS.SGS.BV
Application: Chemical, Water, Oil and gas, Electricity
