In recent years, China's centrifugal pump industry has developed rapidly, benefiting from the continuous improvement of production technology in the centrifugal pump industry and the continuous expansion of the downstream demand market. The centrifugal pump industry is very optimistic about the development situation in the domestic and international markets.
China's centrifugal pump industry is facing a new development situation, due to the increasing number of new entrants into the enterprise, the upstream raw material prices continue to rise, leading to lower profits in the industry, so China's centrifugal pump industry market competition is becoming increasingly fierce. In the face of this situation, the centrifugal pump industry industry enterprises should actively respond, focus on cultivating innovation ability, and constantly improve their own production technology, strengthen the competitive advantage, at the same time centrifugal pump industry enterprises should fully grasp the industry market trend, Continue to learn the industry's latest production technology, to understand the industry's national policies and regulations to grasp the same industry competitors in the development of the dynamic, the only way to enable enterprises to fully understand the industry's development and their own position in the industry, and to develop the right Development strategy to enable enterprises in the brutal competition in the market to obtain a leading edge.
DL vertical multi-stage centrifugal pump is a kind of centrifugal pump, the pump used in the structure of the vertical, sub-form. So that vertical multi-stage centrifugal pump safe operation, smooth, long life, small footprint, safe and easy maintenance. Our company adopts the excellent hydraulic model with high efficiency and energy saving, so it has the advantages of high efficiency, wide range of performance and so on, and better meets the requirements of users. Vertical multi-stage centrifugal pump is suitable for industrial and urban water supply and drainage. Pressure, long-distance water, heating, bathroom, boiler heating and cooling cycle pressurization, air conditioning and refrigeration systems and water equipment and other occasions.
DL vertical multi-stage centrifugal pump works and maintenance, when the multi-stage centrifugal pump motor drive shaft on the high-speed rotation of the impeller, filled with the liquid in the impeller under the action of centrifugal force from the impeller center along the blade between the flow channel Thrown around the impeller, because the liquid by the role of the blade, so that the pressure and speed increased at the same time, through the chute of the flow channel was cited to the next level of the impeller, so that once through all the impeller and guide shell, further So that the pressure of the liquid energy increases. After each impeller is superimposed on each step, a certain lift is obtained. Can be applied to industrial and urban water supply and drainage, high-level pressurized water, garden irrigation, heating and water cycle pressurization and equipment supporting multi-stage centrifugal pump is the flow medium (gas and liquid, it can be suspended particles and gas or liquid mixture) from The blade rotates the root (inlet) into the medium, and the medium relies on high-speed rotation of the blade to obtain centrifugal force to produce a high pressure, medium discharge device from the discharge port (outlet). Multi-stage centrifugal pump is the same function of two or more pumps together, the fluid channel structure, the performance of the first stage of the media pressure port and the second level of the import phase, the second level of the media pressure And the third level of the import of the same, so the formation of a multi-stage series of centrifugal pump. The significance of multistage centrifugal pumps is to increase the set pressure.
DL vertical multi-stage centrifugal pump in the daily use of the process should pay attention to maintaining the use of centrifugal pump products in order to extend its life, the equipment is not prone to failure phenomenon, DL vertical multi-stage centrifugal pump routine maintenance should be done The following points:
1, should always wipe the centrifugal pump unit and centrifugal pump pipe above the liquid and dust or other dirt, so that the centrifugal pump to keep clean.
2, should also be regularly replaced centrifugal pump inside the bearing grease, for example, all horizontal centrifugal pump products are usually equipped with sliding bearings, all equipped with sliding bearings centrifugal pump products in use after about 100 hours, Should be replaced with lubricants, after each run 300-500 hours after a rolling bearing for the oil.
3, if it is sealed single-stage single-suction centrifugal pump products to be checked at any time and adjust the tightness of the filler.
4, often check and fasten the loose bolts and nuts.
5, often cleared out of the pool inside the suspended matter, so that the centrifugal pump into the pool clean, to prevent debris blocked the inlet pipe and was sucked into the pump after the damage to the impeller or plug in the pump inside.
2017年3月15日星期三
What is the market sales of home-type vertical multi-stage pumps?
What is the market sales of home-type vertical multi-stage pumps?
For home-based vertical multi-stage pump market sales survey process, will find that in fact the sales of this product, or very good. Although we live in many urban areas, people found themselves in the district after the purchase, it seems that there will not be enough water pressure situation. But in many mountain areas, because they are in the residential construction, may not be in accordance with the district to plan. Then their living water, often there will be enough water pressure situation. So they have to use the multi-stage pump. So its market demand, or relatively large.
Not to mention this kind of home-based products, he was selling, in fact, the price is not particularly expensive. General ordinary model of product prices, may be in the 500 to 700 dollars or so. So most of the family to buy him, this price can still be accepted.
In addition, we buy the product which will find a lot of well-known enterprises for the production of pumps, but also on this home-class multi-stage pump to sell. Although its sales price is not particularly high, but it is still a considerable profit inside. So in the sale of him, because there is no need to provide on-site installation services. So the market for such products, the relative will be more relaxed.
For home-based vertical multi-stage pump market sales survey process, will find that in fact the sales of this product, or very good. Although we live in many urban areas, people found themselves in the district after the purchase, it seems that there will not be enough water pressure situation. But in many mountain areas, because they are in the residential construction, may not be in accordance with the district to plan. Then their living water, often there will be enough water pressure situation. So they have to use the multi-stage pump. So its market demand, or relatively large.
Not to mention this kind of home-based products, he was selling, in fact, the price is not particularly expensive. General ordinary model of product prices, may be in the 500 to 700 dollars or so. So most of the family to buy him, this price can still be accepted.
In addition, we buy the product which will find a lot of well-known enterprises for the production of pumps, but also on this home-class multi-stage pump to sell. Although its sales price is not particularly high, but it is still a considerable profit inside. So in the sale of him, because there is no need to provide on-site installation services. So the market for such products, the relative will be more relaxed.
2017年3月13日星期一
Selection of Single - stage Single - suction Vertical Centrifugal Pump and Its Product Introduction
Centrifugal pumps are one of the most widely used pumps in industrial pumps and are now widely used in municipal, chemical, printing and dyeing, pharmaceutical, shipbuilding, foundry, food and other industries. In order to increase everyone's understanding of centrifugal pumps, centrifugal pump manufacturers today to detail the single-stage single-suction vertical centrifugal pump selection and product features introduced
SYL single stage single suction vertical centrifugal pump
SYL single-stage single-suction vertical centrifugal pump is the Shanghai Weihu pump using IS-type centrifugal pump performance parameters and vertical pump structure, in strict accordance with international standards ISO 2858 and the latest national standard design of efficient energy efficient products, IS-type horizontal pump, DL-type pumps and other conventional products of the new vertical centrifugal pump. Flow range of 1.5 ~ 2400m3 / h, head range of 8 ~ 150m, sub-basic type, expansion type, A, B, C cutting type more than 250 kinds of specifications. SYR type chemical pump, SYY (YG) type oil pump and SYHY type vertical explosion-proof chemical pump series are designed and manufactured according to the different flow medium and temperature.
Single - stage single - suction vertical centrifugal pump product characteristics
1, pump structure is compact, small size, beautiful appearance. The vertical structure of the center of gravity is lower and the center of gravity coincides with the center of the pump, enhanced pump operation stability and life.
2, easy to install. The same diameter and the same center line, the same as the valve can be installed directly in any part of the pipeline. The motor with rain cover can be used outdoors. The pump has a mounting foot so that the pump is stable.
3, running smoothly, low noise, high component concentricity. Motor with low noise bearings, and equipped with non-stop refueling device, pump impeller with excellent dynamic and static balance, running without vibration, improve the use of the environment.
4, no leakage. Shaft seal with corrosion-resistant carbide mechanical seal to solve the centrifugal pump packing seal leakage problems, to extend the service life, to ensure that the clean and clean operation of the site.
5, easy maintenance. Do not remove the pipe, as long as the removal of the pump nut, remove the motor and transmission components can be maintenance.
6, according to the site conditions of use, the pump can be vertical, horizontal, multi-way installation, according to the flow head requirements, and use, in series method to increase the required flow head.
Single - stage centrifugal pump selection requirements
1, the pump system of high working pressure ≤ 1.6MPa, the pump inlet, pump system, the amount of high working pressure ≤ 1.6MPa, that is, pump inlet pressure + pump head ≤ 1.6MPa, please specify the system when the work pressure. When the inlet pressure is greater than 0.4MPa, or the pump system working pressure is greater than 1.6MPa, should be made in the order, so that in the manufacture, the pump part of the flow and the connection part of the cast steel material.
2, the applicable medium: water pump media should be no corrosive liquid, medium solid insoluble, the volume does not exceed 0.1% of the volume, particle size <0.2Mm, such as the media with a small particle, please specify when ordering.
3, the ambient temperature does not exceed 40 ℃, relative humidity does not exceed 95%.
Our website:www.pump-weihu.com,Email:fay@welpump.com.
SYL single stage single suction vertical centrifugal pump
SYL single-stage single-suction vertical centrifugal pump is the Shanghai Weihu pump using IS-type centrifugal pump performance parameters and vertical pump structure, in strict accordance with international standards ISO 2858 and the latest national standard design of efficient energy efficient products, IS-type horizontal pump, DL-type pumps and other conventional products of the new vertical centrifugal pump. Flow range of 1.5 ~ 2400m3 / h, head range of 8 ~ 150m, sub-basic type, expansion type, A, B, C cutting type more than 250 kinds of specifications. SYR type chemical pump, SYY (YG) type oil pump and SYHY type vertical explosion-proof chemical pump series are designed and manufactured according to the different flow medium and temperature.
Single - stage single - suction vertical centrifugal pump product characteristics
1, pump structure is compact, small size, beautiful appearance. The vertical structure of the center of gravity is lower and the center of gravity coincides with the center of the pump, enhanced pump operation stability and life.
2, easy to install. The same diameter and the same center line, the same as the valve can be installed directly in any part of the pipeline. The motor with rain cover can be used outdoors. The pump has a mounting foot so that the pump is stable.
3, running smoothly, low noise, high component concentricity. Motor with low noise bearings, and equipped with non-stop refueling device, pump impeller with excellent dynamic and static balance, running without vibration, improve the use of the environment.
4, no leakage. Shaft seal with corrosion-resistant carbide mechanical seal to solve the centrifugal pump packing seal leakage problems, to extend the service life, to ensure that the clean and clean operation of the site.
5, easy maintenance. Do not remove the pipe, as long as the removal of the pump nut, remove the motor and transmission components can be maintenance.
6, according to the site conditions of use, the pump can be vertical, horizontal, multi-way installation, according to the flow head requirements, and use, in series method to increase the required flow head.
Single - stage centrifugal pump selection requirements
1, the pump system of high working pressure ≤ 1.6MPa, the pump inlet, pump system, the amount of high working pressure ≤ 1.6MPa, that is, pump inlet pressure + pump head ≤ 1.6MPa, please specify the system when the work pressure. When the inlet pressure is greater than 0.4MPa, or the pump system working pressure is greater than 1.6MPa, should be made in the order, so that in the manufacture, the pump part of the flow and the connection part of the cast steel material.
2, the applicable medium: water pump media should be no corrosive liquid, medium solid insoluble, the volume does not exceed 0.1% of the volume, particle size <0.2Mm, such as the media with a small particle, please specify when ordering.
3, the ambient temperature does not exceed 40 ℃, relative humidity does not exceed 95%.
Our website:www.pump-weihu.com,Email:fay@welpump.com.
2017年3月8日星期三
Multi-stage pump system components
The multi-stage pump consists of five stages, one grade and four secondary, and its components include: stator, rotor, balancing mechanism, shaft end sealing mechanism, sliding pin, bearing and sliding pin system. Weihu multistage pump manufacturers to learn more about these components
1 stator part
Mainly by the bearing, the first cover, the water section, guide vane, the water section, tail cover and other parts with tightening bolts connected to the inlet section of the suction port, the water outlet are vertical upward, , The middle section, the water section of the static sealing surface is by the metal surface plus "o" -shaped seal, in the disassembly of the pump, the sealing surface must be carefully protected, guide vane cover and the middle of the sealing surface with anti- Vane at the three copper nails in the tightening of the bolt when compressed 0.6 to 0.8 mm to ensure.
2 rotor part
The structure of the rotor is closely related to the overall structure of the pump, the stability of the operation and the performance of the product, and the main performance is the way the impeller is mounted on the shaft. The feed pump is slid on the shaft and one is used to withstand the thrust Of the balance plate and consider the thermal expansion of the toothed pad and pressing ring, shaft end sets, rubber seal ring, casing, sleeve, lock nut and other components.
3 balance body
The multistage pump uses the balance plate steering force and the rotor is positioned in the axial direction.The stability of the working mechanism of this balancing mechanism is closely related to the reliability and service life of the product. The balancing mechanism is composed of balance plate, And other components, to 100% balance of axial force, high sensitivity, changes in working conditions automatically adjust the ability to start, stop and load changes will cause the balance plate and balance sets of wear and tear, it should minimize the number of starts and Increase the balance plate, balance the end face hardness. In order to prevent the balance of grinding, increase the thrust bearing.
4-axis seal
Shaft end seal has become the biggest threat to long-term continuous operation of the feed pump. In order to overcome this weak link, it is necessary to consider the good cooling of the stuffing box when packing is used, and the cooling water is introduced from the top cover and the tail cover. Cover, tail cover with heat sink, cooling water for the ambient temperature of industrial water or tap water pressure of 0.1MPa or more, the water temperature does not exceed 33 ℃, the water temperature difference of not more than 10 ℃.
5 bearing part
The bearing is directly related to the safe operation of the pump one of the key components, therefore, its structure must be safe and reliable.The pump rotor is located in the bearing body of the two sliding bearings to support the bearing with thin oil lubrication when running for a period of time bearing , The lower part of the bearing body can be used to adjust the adjustment screw, so that the rotor is always in the center position, each adjustment of the adjustment screw, the bearing body and the first cover, tail cover should be re-positioning of the positioning pin hole positioning.
6 sliding system
The feet of the sections of the multi-stage pump are supported on the table surface. The four feet of the inlet and outlet sections are fixed by the four bolts to ensure that the concentrations of the sections are maintained at the same time. Point in the pump inlet side, multi-stage pump plate and the entrance section at the foot with a cross pin, the lower part of the vertical pin to ensure that the multi-stage pump along the longitudinal side of the export side of the free expansion of the export section of the lower part of the longitudinal pin, Vertical centerline expansion.
After reading the above description, we are not more understanding of multi-level pump it? Shanghai sewage pump, Jinan pipeline pump, Boshan multi-stage pump is my company's main products, welcome friends from all walks of life come to my company purchase!
Multi-stage pump in series, parallel use
In order to meet the needs of the conditions, under certain conditions, the multi-stage pump in series or parallel is a commonly used method, then you know how multi-stage pump, parallel use of the specific situation? Multistage pump string, What are the precautions when working in parallel? With this question, let's take a look at the following.
1, two multi-stage pump in series when the total head of the work is less than twice the pump work alone, more than the series before the separate run of the head; colleagues in series after the flow than a pump work alone, this is because the pump After the series, although its lift doubled, but the pipeline resistance loss did not multiply, so the multi-stage pump rich head to increase the flow.
2, two multi-stage pump parallel flow is equal to the sum of the pump flow in parallel, but less than twice the parallel flow of the pump; colleagues in parallel with the head when the pump is greater than the work of a single pump head. More friction losses increase with increasing flow, which requires each pump to increase its head to overcome this increased pipeline loss.
Multi-stage pump string, parallel work Note:
1, multi-stage pump in series, can improve the head, but pay attention to more than one pump in series behind the pump pump strength.
2, centrifugal pump parallel operation can increase the flow, in the same pipeline system, the proportion of increased flow will increase with the number of parallel pump to reduce.
3, the best use of the same performance of the centrifugal pump for string, parallel.
4, whether it is in series or parallel work, a single centrifugal pump operating point should strive to fall within the efficient area.
After reading the introduction of Xiaobian above, we are not more understanding of the multi-stage pump? Multistage pump is my company's main products, welcome friends from all walks of life come to my company to buy, look forward to working with you!
1, two multi-stage pump in series when the total head of the work is less than twice the pump work alone, more than the series before the separate run of the head; colleagues in series after the flow than a pump work alone, this is because the pump After the series, although its lift doubled, but the pipeline resistance loss did not multiply, so the multi-stage pump rich head to increase the flow.
2, two multi-stage pump parallel flow is equal to the sum of the pump flow in parallel, but less than twice the parallel flow of the pump; colleagues in parallel with the head when the pump is greater than the work of a single pump head. More friction losses increase with increasing flow, which requires each pump to increase its head to overcome this increased pipeline loss.
Multi-stage pump string, parallel work Note:
1, multi-stage pump in series, can improve the head, but pay attention to more than one pump in series behind the pump pump strength.
2, centrifugal pump parallel operation can increase the flow, in the same pipeline system, the proportion of increased flow will increase with the number of parallel pump to reduce.
3, the best use of the same performance of the centrifugal pump for string, parallel.
4, whether it is in series or parallel work, a single centrifugal pump operating point should strive to fall within the efficient area.
After reading the introduction of Xiaobian above, we are not more understanding of the multi-stage pump? Multistage pump is my company's main products, welcome friends from all walks of life come to my company to buy, look forward to working with you!
pipeline pump installation
Mention the pipeline pump, we may not unfamiliar, and now a lot of places can be applied to the pipeline pump, which we know how to install the pipeline pump? Shanghai Weihu pipeline pump manufacturers to introduce the specific content
1, the installation should be selected away from the transport of the nearest place, so that the Jinan pipeline installed in the minimum suction height and the shortest suction pipe
Note: should ensure that the unit and the surrounding obstacles more than 150 mm distance, so that the motor fan has access to adequate air source.
2, when the pump used in the more stringent requirements of the vibration, you can use the shock absorber (pad), according to the manufacturer's instructions to install.
3, the installation of the pipeline should be reliable fixed, close to the pump flange pipe support should be sufficient rigidity, not to allow the pump to withstand the weight of the pipeline pressure.
4, Jinan pipeline pump group should be installed to avoid direct sunlight and rain.
5, Weihu pipeline pump inlet should be installed vacuum pressure gauge, the export flange should be installed pressure gauge to observe and control the operation of the pump. Pressure gauge should be the actual range of 2 to 3 times the appropriate pressure.
6, Weihu pipeline pump inlet and outlet piping should be installed gate valve to facilitate maintenance and operation regulation.
7, wiring: must be required by the nameplate correct wiring, wiring, the terminal must be strong, do not allow loose, otherwise, will cause poor contact caused by phase loss burner.In order to ensure reliable operation of the motor, electrical switch should be installed overload Protection device, and according to the motor nameplate on the current requirements to adjust the size of the protection device settings.
Warning: If the overload protection device is not installed, it will cause the motor to burn out due to the sudden increase of the current when the outlet valve is fully open or when the large flow is running or under certain circumstances.
8, in the inhalation state (water level below the impeller axis or water level below the pump inlet axis), the standard atmospheric pressure, the pump installation height H = 10- (NPSH) r-0.5-hw, hw for the suction pipe resistance Loss (formula in the calculation unit: m).
9, in order to facilitate the start before the Jinan pipeline pump irrigation, can be added at both ends of the check valve by a bypass valve, before the pump starts to open the bypass valve to the pump irrigation, filled and closed, easy to use. In the high-rise building water supply or outlet pressure greater than 0.2MPa pump, in addition to the discharge port with a gate valve, but also between the pump outlet and gate valve with a check valve, so as to avoid sudden power failure caused by high pressure water impeller damage.
After reading the above description, we know how to install Jinan pipeline pump? Later Xiaobian will continue to release some of the relevant contents of the pipeline pump, welcome to the pump pump interested friends continue to our website.
2017年2月16日星期四
Centrifugal pump start method
Centrifugal pump start method, centrifugal pump start note
Before the start of the centrifugal pump is ready, open the diversion gate, so that the front tank to the design level, you can start the pump.
Centrifugal pump start Note:
When starting the centrifugal pump, the staff will have to leave the unit at a certain distance. For centrifugal pumps and volute mixed flow pump, usually closed valve start, standby group speed reaches the rated value, you can open the vacuum gauge and the pressure gauge on the valve, this time, the pressure gauge reading should rise to the pump flow is zero When the maximum value, then you can gradually open the pressure on the pipeline valve. If there is no exception, then the vacuum gauge reading will gradually increase, the pressure gauge reading should be gradually decreased, the motor ammeter reading should be gradually increased. Start the work until the valve is fully open, that is completed. In the closed valve should be noted that the valve running time should generally not exceed 5 minutes, such as the time is too long, the pump liquid heat, may cause accidents.
For self-priming pumps, vertical axial flow pump and guide vane mixed flow pump, usually open the valve. While filling the rubber bearing, while the motor can start, until the speed reaches the rated value, stop filling water, that is, to complete the start work.
Before the start of the centrifugal pump is ready, open the diversion gate, so that the front tank to the design level, you can start the pump.
Centrifugal pump start Note:
When starting the centrifugal pump, the staff will have to leave the unit at a certain distance. For centrifugal pumps and volute mixed flow pump, usually closed valve start, standby group speed reaches the rated value, you can open the vacuum gauge and the pressure gauge on the valve, this time, the pressure gauge reading should rise to the pump flow is zero When the maximum value, then you can gradually open the pressure on the pipeline valve. If there is no exception, then the vacuum gauge reading will gradually increase, the pressure gauge reading should be gradually decreased, the motor ammeter reading should be gradually increased. Start the work until the valve is fully open, that is completed. In the closed valve should be noted that the valve running time should generally not exceed 5 minutes, such as the time is too long, the pump liquid heat, may cause accidents.
For self-priming pumps, vertical axial flow pump and guide vane mixed flow pump, usually open the valve. While filling the rubber bearing, while the motor can start, until the speed reaches the rated value, stop filling water, that is, to complete the start work.
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