CSSC
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26
2014
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11
On the Application of Pump Protectors in Centrifugal Pumps
Author:
Cixi Feinade Electrical Appliance Factory (shortened to “Feinade Electrical”) is a company specializing in the manufacture and sale of motor protectors, power protection relays, and phase-sequence relays. Its main products include: three-phase power protectors, comprehensive motor protectors, phase-loss protectors, phase-break protectors, phase-break and phase-sequence protectors, three-phase overload protectors, intelligent motor protectors, microcomputer-based motor protectors, comprehensive motor protectors, power protection relays, surge protectors, temperature controllers, explosion-proof switches, explosion-proof control boxes, escalator synchronization testers, standalone automotive air-conditioning controllers, stepless speed regulators for automotive fans, boiler level gauges, and more.
Cixi Feinade Electrical Appliance Factory (shortened to “Feinade Electrical”) is a company specializing in the manufacture and sale of motor protectors, power protection relays, and phase-sequence relays. Its main products include: three-phase power protectors, comprehensive motor protectors, phase-loss protectors, phase-break protectors, phase-break and phase-sequence protectors, three-phase overload protectors, intelligent motor protectors, microcomputer-based motor protectors, comprehensive motor protectors, power protection relays, surge protectors, temperature controllers, explosion-proof switches, explosion-proof control boxes, escalator synchronization testers, standalone automotive air-conditioning controllers, stepless speed regulators for automotive fans, boiler level gauges, and more. These products are supplied as supporting components to major domestic elevator manufacturers, thermal power plants, and automobile factories.
The centrifugal pump is the most widely used type of hydraulic machinery and is one of the machines most closely associated with our daily life and production activities.
II. Industrial Engineering
(1) Solid-Particle Liquid Transport In industrial engineering, fluid machinery used to transport solid particles via a liquid is referred to as a solid-liquid two-phase flow pump, also known as a slurry pump. Slurry pumps are designed for conveying solid materials of various shapes and are widely employed in industries such as metallurgy, petrochemicals, and food processing, as well as in applications like tailings pumping in mining operations, slurry pumps used in coal preparation plants, ash and slag pumps in power plants, and dredging pumps for river and canal maintenance. Over the past decade, pipeline transportation technology for solid materials has rapidly advanced in the mining and energy sectors, leading to a growing demand for slurry pumps. Meanwhile, driven by advances in modern science and technology, slurry pumps are trending toward longer service lives, higher efficiency, and greater product variety. Currently, the three main types of slurry pumps widely used across various industries worldwide are centrifugal pumps, seal-less pumps, and diaphragm pumps; among these, centrifugal slurry pumps account for the vast majority. Centrifugal slurry pumps can be further classified according to their specific applications into sewage pumps, gear pumps, slurry pumps, sand pumps, dredging pumps, and gravel pumps, among others. Additionally, there are several specialized types of centrifugal slurry pumps.
Features of this pump:
1) It features a seal without packing and other shaft sealing devices, and does not require a pressurized water shaft seal either. As a result, the medium being conveyed remains undiluted. There is no frequent maintenance or power loss caused by wear of the shaft sealing device.
2) The material inlet is open vertically upward, ensuring that no air blockage or cavitation occurs during operation. It is suitable for applications with frequently varying working flows within the maximum range and can even run under no-load conditions.
3) The reflux gap between the impeller and the cover plate can be adjusted externally;
4) Simple structure, reliable operation, and easy maintenance.
(2) Petroleum and Chemical Industry
1 Centrifugal Pumps in the Petroleum Industry
The electric submersible centrifugal pump is a widely used rodless pumping device. It involves lowering both the electric motor and the centrifugal pump into the wellbore, where they are connected to the tubing. The motor is linked to the surface power supply via an electrical cable. The downhole unit of this pump consists of a multistage centrifugal pump, a protector, and a submersible electric motor. The electric submersible centrifugal pump is particularly well-suited for high-capacity oil extraction in the middle and late stages of oilfield waterflooding operations. As oil production deepens, the oil and gas content in the well gradually declines. To ensure continued and efficient extraction, it is essential to inject water and chemical agents into the well. High-power, high-pressure, and high-flow centrifugal pumps—whether multistage or high-speed centrifugal pumps—are critical equipment for water injection operations.
After oil and gas are brought to the surface, they are collected and measured at gathering stations. Following initial separation of oil and gas, the mixture is transported to a central processing facility for further heating and separation, dehydration, and crude oil stabilization. Wastewater undergoes sedimentation and filtration, while natural gas is stripped of light hydrocarbons and dehydrated. Ultimately, four qualified products—crude oil, natural gas, treated water, and light hydrocarbons—are produced. The separated crude oil and natural gas are then directly sent to refineries or conveyed via pipelines to various end-users. During the collection and transportation process, centrifugal pumps play an indispensable role in conveying liquids.
Our products are primarily supplied to domestic clients including Shanghai Volkswagen, Foxconn Group, Mitsubishi Group, Suzuki Group, Tianjin Crane, General Electric, and others. We also export to countries such as Europe, Taiwan, Japan, and Southeast Asia.
Founded in 1992, the company is located in the northern part of Cixi City, on the scenic shores of Hangzhou Bay. It is 60 kilometers east of Yueshe International Airport, 40 kilometers from Beilun Port Terminal, and just 5 kilometers from the railway freight station. National Highway 329 runs through the urban area of Cixi, and the Shanghai-Hangzhou-Ningbo Expressway provides seamless connectivity, ensuring exceptionally convenient transportation access. The company covers an area of 45,000 square meters, with total assets amounting to 85 million yuan. It employs over 1,200 people, including a research and development team of more than 60 members—of whom 25 hold bachelor’s degrees or higher—and over 30 engineers and technical specialists. The testing team comprises more than 50 members. As a technology-oriented enterprise integrating R&D, manufacturing, trade, and service, the company specializes in industrial electrical equipment. It boasts a highly skilled professional team with over ten years of experience in microcontroller development and embedded software design, and excels in applying microcontroller technology to fields such as industrial control, power electronics, and automotive electronics.
The company has obtained ISO9001:2000 quality system certification, and some of its products have been certified by the European Union’s CE and RoHS certifications. As of the end of 2008, the company had filed a total of 15 patent applications, including 6 invention patents. It also holds 2 registered software copyrights.
Latest updates
2019-12-05
The company has been awarded the “AAA”-level harmonious labor relations enterprise designation by Chongqing Municipality.
Recently, Chongqing Hydraulic Mechanical-Electronical was jointly recognized by the Chongqing Municipal Bureau of Human Resources and Social Security, the Chongqing General Trade Union, the Chongqing Enterprise Confederation, and the Chongqing Federation of Industry and Commerce as a “AAA”-level (the highest level) enterprise with harmonious labor relations. Over the past year, the Party and administration of Chongqing Hydraulic Mechanical-Electronical have continuously strengthened human resource management, guided by the "Guiding Opinions on Intensifying Talent Recruitment and Development to Promote Enterprise Growth," and have steadily carried out efforts to "recruit, employ, and retain talent." By establishing proactive compensation policies, the company has attracted and recruited talented individuals...
2019-12-04
Prevent problems before they become serious—Chairman Li Jie leads a team to carry out safety inspections.
On November 29, Li Jie, Party Secretary and Chairman of the company, personally led a team—including responsible persons from the Safety Technology Department, the Production Support Department, the Security Office, and heads of various specialized groups under the Safety Certification—on comprehensive inspections of the safety production conditions at each unit and at Rui'ou Company.
2019-12-04
The special inspection and rectification team for confidentiality from the Chongqing company visited the company to provide guidance and inspection.
On December 2, a four-member inspection and supervision team from the Chongqing company’s special rectification effort for confidentiality conducted a targeted inspection of the company’s confidentiality work. Members of the Confidentiality Committee—including company leaders Li Jie, Liu Bing, Lu Bin, and Ran Yimin—as well as personnel from the Confidentiality Office and relevant departments, attended the briefing session on the special inspection of confidentiality work.
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