1. Overview of Kumagai Company
Chengdu Xionggu Electrical Industry Co., Ltd. is a high-tech enterprise specializing in IGBT inverter, internal combustion engine drive and other long-distance pipeline welding equipment. The company covers an area of ​​10,000 square meters, with 5,000 square meters purification workshop and 4 production lines. The company has more than 130 employees, and more than 50% of its employees have received higher education.
The current main products of Xionggu Company include MPS and D7 series IGBT inverter multi-function welding machine, DSA series IGBT inverter digital semi-automatic MIG/MAG welding machine, ZX7 series IGBT inverter DC manual/argon arc/downward welding machine, WS series IGBT inverter DC argon arc welding machine, MG series gasoline engine driven multi-function welding machine, MD series diesel engine driving digital welding station, NB series IGBT inverter semi-automatic (MIG/MAG) welding machine, etc., all products have passed the national CCC certification.
The semi-automatic welding machine (D7-500) for field long-distance pipeline welding developed by Kumagai Company has filled the domestic gap and broke the monopoly of this type of welding machine market by foreign products. In 2000, it was funded by the National Innovation Fund, 2002. In the year, it was awarded the title of National Key New Product. In 2003, it was listed in the National Torch Program and is the recommended product for the petroleum engineering construction system.
In 2004, Xionggu Company introduced the upgraded product of the D7-500 welder MPS-500 welder. In May 2008, the project “MPS Industrialization of Pipeline Semi-Automatic Welding Equipment Based on IGBT Application†was approved by the National Development and Reform Commission. (Development and Reform Office High Technology <2008>1135), this is the 2008 China electric welding machine industry and the only project funded by the National Development and Reform Commission in Sichuan Province. It is the state's support for Xionggu Company's years of commitment to product independent innovation research and development. Recognition.
Xionggu welder has been widely used in petroleum, petrochemical, electric power, shipbuilding, steel structure, machinery, chemical and other industries. It is the national key oil and gas project construction and the Three Gorges for the West-East Gas Pipeline, Sichuan-East Gas Pipeline, and West-East Gas Pipeline. The construction of national key power projects such as Ertan, Longtan, Xiaowan, Xiaolangdi and Huodong East Power Transmission provides a large number of high-quality welding machines. At present, the products have been exported to Vietnam, Indonesia, India, Iraq, United Arab Emirates, Turkmenistan, Kazakhstan, South Africa, Algeria, Sudan and other countries.
Xionggu Company has an excellent technical service team and a service network with reasonable layout and quick response. It provides users with all-round technical support and services, and implements on-site personal service for key pipeline projects, and also provides customers with multiple services. Free technical training.
Xionggu Company has established a perfect modern enterprise management system, attaches great importance to employee education and training, and is a learning modern enterprise. The company established party branches and trade unions. In 2008, it won the honorary title of Chengdu-level “Labor Relations Harmonious Enterprise†and Chengdu Federation of Trade Unions “Workers Pioneerâ€.
2, MPS-500 IGBT inverter multi-function welder
Figure 1 MPS-500 IGBT inverter multi-function welder
MPS-500 IGBT inverter multi-function welding machine is an upgraded product of Xionggu D7-500 welding machine. The actual object is shown in Figure 1. Since the advent of the D7-500 welder in 2000, thousands of Xionggu multi-function welders have been used for the construction of long-distance oil and gas pipelines at home and abroad. In order to meet the needs of users, Kumagai has upgraded its technology based on the D7-500 welder. The main technical parameters of MPS-500IGBT inverter multi-function welding machine are shown in Table 1.
Table 1 Main technical parameters of MPS-500 IGBT inverter multi-function welder
type   number | MPS-500 |
Welding function | Self-protecting flux cored wire semi-automatic welding, cellulose electrode down-welding, low-hydrogen electrode down-welding, DC argon arc welding |
Input power | Three-phase 380V±15 % 50Hz |
Rated input power | 24kVA |
Rated output current / voltage | 500A/39V |
Voltage adjustment range ( CV ) | 17V/60A ~ 39V/500A |
Current adjustment range ( CC ) | 50 ~ 500A |
Rated load duration | 60 % |
Highest no-load voltage | 75V (falling characteristic CC ), 45V (flat characteristic, CV ) |
quality | 48kg |
Enclosure rating | IP23 |
cooling method | Independent air duct type air cooling |
Dimensions / mm (width × depth × height) | 350×600×460 |
The MPS-500 welder adopts the patented independent air duct technology (200520034327.7), which is more suitable for construction under harsh environmental conditions in the field. The independent air duct structure is shown in Figure 2.
The independent air duct has the following advantages:
(1) The high-voltage conductive parts of the welding machine (such as three-phase rectifier bridge, IGBT terminal, etc.) and the control circuit are completely isolated from the external space. When the welding machine is running, the cooling air does not pass through the above parts, which reduces the welding machine in the rain. In the humid, high dust environment, leakage during operation, control circuit board failure, play the role of rain, moisture, and dust, so that the adaptability of electric welding machine in the desert, Loess Plateau, Jiangnan water network area is greatly improved. .
(2) The electromagnetic shielding between the high-power circuit and the control circuit is realized, so that the anti-interference ability of the electric welding machine is further improved and the operation is more reliable.
(3) Without increasing the air volume of the fan, the load duration of the welder can be increased by about 20%, which means that the welder can be improved in heat dissipation, reliability and extension of the welder using the same fan. The purpose of the service life.
(4) The independent air duct heat dissipation technology is adopted to effectively isolate the high-voltage live parts of the welder from the air duct, avoiding problems such as leakage and insulation performance caused by metal dust accumulation, and improving the operation of the welder in the field environment. safety.
Figure 2 Schematic diagram of the independent air duct structure
The MPS-500 welder maintains the versatility of the D7-500 welder, improves the performance of low-hydrogen, cellulose electrode welding and semi-automatic self-shielding welding, using a method for increasing the arc initiation and re-ignition of cellulose electrodes. The success rate method greatly improves the arc-igniting performance of the cellulose electrode.
In order to improve the reliability of the MPS-500 welder, improve the working environment of the welder and reduce the pollution of the welder to the grid, a passive EMI filter is installed at the inlet of the three-phase AC power supply of the MPS-500 welder (see Figure 3). The EMI filter board is equipped with a lightning protection device, which is more suitable for field construction.
Figure 3 passive EMI filter board
In the development and design of the MPS-500 welding machine, the adaptability of the welding machine under the low temperature conditions in the north of winter is fully considered, and special requirements are made on the selection of components, so that the welding machine can operate reliably under low temperature conditions. . In January 2008, the MPS-500 welder performed a low-temperature welding performance test at the Pipeline Welding Technology Center. The test proved that the MPS-500 welder and the XG-90LN wire feeder are fully capable of meeting the low temperature environment (-30 °C). Requirements.
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