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How to buy a reliable multi-stage pump for mining?

The core product of the mine drainage system, the mine multi-stage pump, as one of the important guarantees for maintaining mine safety, shoulders a huge responsibility. Therefore, buying a reliable mine multi-stage pump can more effectively guarantee mine production. Safety.     实地考察   So the question is, how can I buy a high-quality multi-stage pump for mining? As long as you follow the following five steps, you can see all the routines and really buy quality products. In the first step, you have to find out the real working conditions of the mine, how big the flow is, how high the lift is, so that you can do better matching. Bad matching is not only inefficient, but also the service life will be shortened. The choice of mining multi-stage pump is not the bigger the better, nor the smaller the better, but according to the actual situation to make dynamic matching, choose the most suitable for your own mining multi-stage pump. The second step is to find mining multi-stage pump manufacturers through various channels. You can start with friends, colleagues, dealers, online, etc., and find some more professional mining multi-stage pump manufacturers. The third step is to make a comprehensive comparison and verification of the credit status of the water pump manufacturers, and select two or three with stronger strength.     Field trips   The fourth step is to conduct on-site inspections of the selected manufacturers (go to their production plants instead of distribution outlets). This step is particularly critical. Because the previous information, credit and other content are all words of one family, there are different degrees of exaggeration, and further field inspections and verifications are needed to see their scale, production equipment, product warehouse inventory, R&D level, production management level, and product quality inspection level. And so on, compare the credit information provided before to ensure that there are no errors and the information is true and valid. After this step, a comprehensive ranking is performed on the selected manufacturers. The fifth step is to test the product application cases on the spot, and select the product use cases advertised by the manufacturer for on-site inspections to determine whether it really exists. In addition, you can learn about the product usage, failure rate, after-sales guarantee capability and other comprehensive usage information from the side . At the same time, after investigating the case, you can also understand the use of others, learn from each other, and improve your own use and management level.     Field trips   If you strictly follow the above five steps, then congratulations, the mining multi-stage pump you purchased must be a reliable quality product. For excessive publicity on the Internet, please be sure to polish it up. For both eyes, it is best to conduct a field survey. After all, many people are good at creating momentum and PS technology is very powerful. After the on-site inspection, these routines will have nowhere to hide, which will also minimize the hidden dangers of mine drainage systems and create a safer and more reliable production environment.
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24
2018-05

Upgraded self-balancing multi-stage pumps in the mine pump room, saving more than 1 million in costs a year

Time of issue: : 2018-05--24
Shanxi Jiexiu Yitang Qingyun Coal Industry Co., Ltd.At the beginning of 2014, Shanxi Jiexiu Yitang Qingyun Coal Industry Co., Ltd. (mine field area is 6.5394 square kilometers, reserves 76.85 million tons, production capacity 900,000 tons per year, mine hydrogeological classification grade is medium, coal seam spontaneous combustion tendency is Level II, the gas level is a gas mine, and the mineable coal seams are all high-quality main coking coal.) In Zibo, Shandong, three coal mines used ordinary drainage multi-stage pumps (with balance discs) were purchased for use as underground mine drainage. In the process, it was discovered that the failure rate of the water pump was too high. The annual maintenance cost of parts was as much as 1.3 million yuan, which far exceeded the purchase cost of the multi-stage pump itself. It also required frequent and repeated maintenance, which consumed a lot of manpower and material resources. Brings huge risks to coal mine production safety.     Downhole pump room      After simple disassembly, assembly and replacement, two new coal mine-specific self-balancing multi-stage pumps started draining operations smoothly. During operation, not only the failure rate was greatly reduced, but also the efficiency was significantly improved. The specific manifestations are as follows: First, the new and old water pumps are also equipped with 1000KW motors, the original drainage operation, the old multi-stage pump needs to work 12 hours a day, and the self-balancing multi-stage pump only needs 8 hours of work; Second, at the same time, due to the high NPSH of the old water pump, two 45KW submersible pumps at the inlet of the pump house need to be equipped for water feeding. After the self-balancing multi-stage pump is running, the water feeding submersible pump is cancelled, and the efficiency is still better than before. Substantially improved; Third, the maintenance cost is greatly reduced. The annual maintenance cost of the old multi-stage pump is as much as more than 1.3 million. The self-balancing multi-stage pump works for more than a year, and the repair parts cost only about 300,000, which greatly reduces the after-sales maintenance cost. Moreover, the failure rate is greatly reduced, and coal mine production is safer and more assured. Fourth, operation and maintenance costs have been greatly reduced. According to the statistics of operation data for more than a year, the annual electricity cost is saved by about 350,000, and the maintenance cost is saved by about 1 million. Without considering the labor cost, the annual cost savings can reach 1.35 million, with considerable benefits. Changsha Canon General Pump Industry Co., Ltd. has been focusing on the research and development of multi-stage pumps for 35 years. With its independent intellectual property rights, it has promoted the upgrade of ordinary multi-stage pumps with balancing discs to self-balancing multi-stage pumps. Nearly 50,000 sets have been promoted in the market, which has brought a new drainage upgrade experience and lower comprehensive use costs to customers in the mining, water conservancy and boiler industries.  
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09
2020-06

Overview of China Water Pump Industry

Time of issue: : 2020-06--09
Overview of China Pump Industry70% of our country's pump products are centrifugal pumps, and rotary and reciprocating positive displacement pumps account for about 18%. It can be seen that horizontal multistage centrifugal pumps occupy an absolute position in pump products. In recent years, the domestic pump industry has grown at an annual rate of 11%-12%, which is higher than the growth rate of the world pump industry. This is mainly due to the gradual maturity of the domestic market and the continuous expansion of demand.    According to statistics, my country has more than 2,000 pump manufacturers of a certain scale. The entire pump industry produces about 450 series and more than 5000 varieties. General pumps can basically be designed and produced in China. Since the 1980s, my country has successively introduced more than 100 series and more than 2,000 varieties, which not only greatly impacted the domestic backward pump industry market, but also narrowed the gap with foreign products. In addition, through the production method of joint ventures and cooperation with foreign countries, the technical level of key pumps in my country is approaching the advanced level of similar foreign pump products.   From the current situation, the domestic pump manufacturing industry is generally composed of three parts of enterprises. The three parts of enterprises are: state-owned enterprises that have undergone shareholding reforms; joint-venture and foreign-controlled joint-stock enterprises and a large number of private enterprises. From the analysis of sales performance in recent years, the top pump manufacturers are undoubtedly large private pump manufacturers. They not only rank among the high-end of the pump manufacturing industry and become the backbone of the pump manufacturing industry, but also have the ability to follow-up development. However, the large number of small and medium-sized private enterprises are still at the lower end of the industrial chain. If they do not seek progress and do not think about joint development, they may be unsustainable in the long run. Although the state-owned enterprises after the shareholding system reform have struggled for quite some time, the gratifying thing is Integration and reorganization have gradually come out of the trough and become a strong force in the pump manufacturing industry; joint ventures, foreign-owned and even wholly-owned enterprises, currently occupy an important position in the domestic pump manufacturing industry. Some formerly experienced large-scale state-owned enterprises exchanged their market, land and human resources for technology shares of foreign pump manufacturers. This aspect allows us to rapidly improve the level of certain key pumps, and at the same time makes these joint ventures or foreign-funded enterprises themselves quickly become popular in China. However, it should also be noted that most of the pumps manufactured by these companies are still in the scope of ordinary pump manufacturing, and the really urgently needed high-end products still need to be imported from abroad.    Progress and gaps in domestic pump products   The development of domestic pump products Due to the expansion of domestic demand in recent years, the domestic pump industry has gained a certain development space. As a result, multi-stage pump products have made some new progress. This is reflected in the increase in the variety and specifications of process pumps; some process pumps that rely on imported technology have already been produced. Serialization, some old products have also been improved on the basis of absorbing imported technology. Small flow and high head pumps with low specific revolutions, corrosion-resistant pumps and sealless pumps all expand the supply space. Especially the key process pumps and large-scale water pumps, such as the hydrogenation feed pumps used in the petrochemical industry, radiant furnace feed pumps, vertical and horizontal high-speed pumps, cryogenic pumps, and many other high-end pumps, have gone through the tireless efforts of manufacturers and users Efforts have been successfully developed and applied. In addition, some pump manufacturers can provide automatic monitoring and control technology according to user requirements to ensure the safe and reliable operation of key parts of the pump in the high-efficiency area. According to statistics, domestic pumps can meet 85% of domestic demand, but there are still some urgently needed high-end pumps that need to be imported.   The gap with foreign products    Although my country's pump manufacturing industry has made considerable achievements, it should be noted that there is still a certain gap compared with foreign products. The efficiency of a considerable number of domestic pumps is 5%~10% lower than that of developed countries.    Generally speaking, the varieties and specifications of domestic pumps are still small, and the product type spectrum speci
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16
2018-05

What is the price difference of the homogeneous competition of multistage centrifugal pumps?

Time of issue: : 2018-05--16
There are five differences between the same model multistage centrifugal pump and a multistage pump configured 1. Material of multi-stage centrifugal pump Material is divided into three aspects: 1. Material: Regular manufacturers will equip parts with corresponding materials in accordance with national and industry standards. For example, in the D-type multi-stage centrifugal pump, according to national standards, some parts of the cast iron pump are made of HT250 cast iron instead of HT200, some parts are made of refrigerated cast iron, and some types of balance discs are made of nodular cast iron. Under some conditions The balance ring should be made of copper, and some types of shaft sleeves should be made of stainless steel. But the actual situation is that many manufacturers have not honestly equipped materials according to national standards. Some manufacturers even use counterfeit materials, which are especially common in the field of stainless steel multistage pumps. If stainless steel materials are compared according to standard grades, some manufacturers may have faked it in the casting process. Reduce the content of some precious and non-prime in order to achieve the purpose of reducing costs.     2. Casting quality: Many small and medium-sized manufacturers actually do not have quality inspection links. For the cast blanks, they usually check the appearance. The inspections for sand holes, pores, cracks, and impurities are not strictly implemented in the procedures, and the technical means are not strict. lack of. This link is also a cost-increasing link for manufacturers, relying on the integrity mechanism between the multi-stage centrifugal pump manufacturer and the casting manufacturer. This is the function of the market competition mechanism, which can virtually reduce the cost of enterprises. But it does not mean that it is a good thing that the testing procedures of multi-stage centrifugal pump manufacturers are not strict. 3. Aging treatment of multi-stage centrifugal pump castings: After the multi-stage centrifugal pump castings are cast, there are stresses inside the castings. Generally, depending on the material, there will be different lengths of aging treatment time. It is generally placed outdoors in the sun and rain for a long time. The actual situation is that many manufacturers use vibration to deal with stress in order to grab urgent orders. Of course, this method cannot completely deal with the stress, so it also has a certain impact on the stability of the pump quality.        2. The accuracy of multistage centrifugal pumps The accuracy of multi-stage centrifugal pumps is divided into two aspects: machining accuracy and assembly accuracy. According to national standards, almost every general and mature pump product has national standards, which clearly stipulate that the processing accuracy of each part of the pump should be controlled within a few threads. In fact, many manufacturers do not have a strict quality control system for the control of processing accuracy. There is no corresponding equipment to ensure machining accuracy. For example: For the same shaft, for flaw detection, quenching and tempering, and beating, the rotor parts on the shaft need to be statically balanced and dynamic balance tested. Each part must be controlled during processing and cannot exceed the allowable range. Because one is short of a few threads, and a few added together, the difference is big. The cooperation between the various components of the multi-stage centrifugal pump depends on the tight assembly. If there is a big gap in work everywhere, it will look like people are old and tend to fall apart. Third, the appearance quality of the multi-stage centrifugal pump The appearance quality of a multistage centrifugal pump mainly depends on three aspects: 1. Mold and casting process: The effect of general wooden mold casting is definitely not as good as that of precision casting and lost foam. There are other advanced casting processes. On the one hand, advanced casting processes will increase the cost due to the use of new molds. On the other hand, it has certain advantages due to the reduction of the cost of appearance processing. 2. Appearance treatment: There are many processes, such as polishing, pickling passivation, and electroplating, and the cost is different, and each has its own merits. 3. Paint process: The seemingly simple paint process, in fact, there is a lot to do. If the paint is done well, the appearance of the product can be improved by several grades, and naturally the price can have more room for improvement. Fourth, product packaging and corporate and brand image building The same product, the packaging, the manufacturer and the brand are different, and the feeling is very different. To create high-quality product packaging, the image of the manufacturer and the brand tonality means more price space.        5. The service of the enterprise an
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