Industry news_News_hangzhou harpow tools Co., Ltd.

Main structure and working principle of internal combustion rail grinding machine

Rail Grinder Electric Rail Grinder Internal Combustion Rail Grinder Electric Rail Grinder Internal Combustion Rail Grinder Features: The NGM-4.8 Internal Combustion Rail Grinder is designed to polish the burrs generated by aluminum heat seamless welding or reinforced welding of rails, as well as rail wear. The body is welded with high-quality carbon structural steel plates, equipped with biased anti slip guide wheels, which can polish the two sides and top surface of the rail head, It is a specialized equipment for rail head grinding in railway engineering. Technical parameters of internal combustion rail grinding machine: 1. Internal combustion engine power: 6.5PS (4.8kW) 2. Spindle speed: 4100r/min 3. Grinding wheel specifications: φ one hundred and fifty × sixty-five ×φ fifty-five 4. Grinding head stroke: 90mm 5. Grinding head inclination angle: 90 ° 6. Profile gauge: ≥ 1000mm 7. Track width: 1450mm 8. Overall weight: 90kg Rail grinding machine function: The rail grinding machine has a simple structure, small volume, light weight, convenient use, fast up and down tracks, insulated running wheels, safe and reliable, and is suitable for grinding the plane, side, curved surface, and various angles of the steel rail. It is also suitable for welding steel rail joints and polishing various switch rails and turnouts. This machine uses an internal combustion engine (electric motor) as the power source, suitable for on-site operations without power supply. Main technical parameters of electric rail grinding machine 1. Motor: power 1.5kw, speed 3000r/min 2. Overall size: 1000 × five hundred and thirty-five × 500 (mm) 3. Grinding wheel size: Φ two hundred ×Φ thirty-two × 25 (mm) 4. Vertical stroke: 0-150mm, lateral stroke: 0-50mm 5. Overall weight: ≤ 42kg 6. Suitable for various rail types (18-43-75) The main structure and working principle of the internal combustion rail grinding machine: The GM-4 grinding machine is powered by a GX160 gasoline engine and uses an A-type V-belt (with an inner circumference of 889mm) to drive the grinding wheel through the transmission system for rail grinding operations. The machine is mainly composed of main components such as a frame, transmission system, grinding wheel, arc grinding roller, and running device. The frame is welded with thin steel plate angle steel. The grinding wheel relies on screw and nut spiral feed, and the running device is connected to the frame with bolts. The rim of the running wheel is high, and it can also be pushed on the ground after getting off the track. Insulated wheels (or rollers) can be used for grinding the top and side of the steel rail; The roller used for grinding the top arc of the rail can be used to repair the rounded corners of the rail. Jining Dingcheng Industrial and Mining Equipment Co., Ltd. specializes in the production of various railway rail transit equipment, including mining equipment such as hydraulic track lifting machines, rack type track lifting machines, manual track lifting machines, manual track lifting machines, YT4-6A hydraulic pusher, manual overhead crane, hydraulic track lifting and shifting machine, electric track cutting machine, claw jack, hydraulic track bending machine, pusher, hydraulic track bending machine, locomotive track falling reset device, electric rail saw machine, TY120C mining hydraulic sliding machine Electric drilling machines, hydraulic extruding machines, hydraulic pullers (hydraulic pullers), rail grinding machines, hydraulic column lifters, hydraulic column returning machines, etc.

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Warm congratulations, the new official website of Hangzhou Internal Combustion Engine Cylinder Cushion Co., Ltd. is fully launched!!!

The trunking shall not be lifted and tied with bare steel wire ropes, and the waterproof busbar trunking shall not be placed or dragged to the ground at will. In a dry, clean, non corrosive, and non corrosive warehouse, the outer packaging of the flexible warehouse should be sandwiched between the upper and lower fir trees of the waterproof bus duct, and the packaging should be released.

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The reason why the steel pad is broken

The high-voltage waterproof bus duct adopts a high-strength and high-performance DMC insulation support block clamping structure, which has good load performance and dynamic thermal stability; Strong overload capacity and low temperature rise. The high-voltage waterproof busbar duct adopts enclosed packaging, which can greatly reduce the characteristics and installation method of the high-voltage waterproof busbar duct. When delivering large currents, the frequency of electrical maintenance can be eliminated. The installation of high-voltage waterproof bus duct is convenient, and it can achieve adjustment of horizontal and vertical degrees of freedom. It can not only meet the expansion and contraction requirements caused by different temperature drops, thermal expansion, and cold contraction, but also compensate for errors caused by foundation settlement. The traditional skateboard expansion device has low protection level, difficult installation, and unreliable operation. The purpose of the high-voltage aluminum tube waterproof bus duct is to connect the electrical connection between transformers and high-voltage distribution boards, the power supply system of large industrial mines and substations, and the electrical connection between generators and compressors. Large enterprises own power plant transformers. Generally speaking, a waterproof busbar duct system with a working voltage above 3000V is called a high-voltage waterproof busbar duct. The insulation resistance between phases of the high-voltage waterproof bus duct is greater than 1000m Ω. The protection level is high, and the outdoor protection level is generally IP54. The high-voltage waterproof busbar duct should be connected to the power plant and large transformers. Maintenance methods for dense waterproof busbar ducts: During the long-term operation of the waterproof busbar duct, it should be inspected and maintained regularly at least once a year. Check that the total load current should not exceed the design current and rated current of the main busbar. Before maintenance of the waterproof busbar duct, check if the waterproof busbar duct system is powered off! Completely cut off all power to the bus duct! Use a multimeter to measure whether the wires have voltage and confirm that the busbar system is not live before daily maintenance. Prevent serious accidents where high voltage can cause injury or even death to operators! During the operation of the waterproof bus duct, check the entire system for leaks, water spray, and potential sources of moisture, as well as any heavy objects that threaten the system and heat sources that affect the temperature rise of the bus duct system. Check for foreign objects entering the waterproof busbar duct. Inspect the components of the waterproof busbar duct system for defects and corrosion, and check if the supporting springs have appropriate elasticity. If any problems are found, please replace them immediately. When the bus is running for a long time, the temperature rise of the joints is checked regularly every year. The temperature rise of the joint is qualified according to GB7251 standard, and does not exceed 70 ℃ (ambient temperature 40 ℃). Check if the connecting bolts and wire contacts of all bus connectors are loose. Prevent the connector from heating up due to increased resistance caused by looseness. Check whether the insulation material is aged and whether the conductive part is melted or deformed. If there is interphase grounding or insulation breakdown, it should be disassembled in sections, inspected in sections using a withstand voltage testing machine to identify faults, or replaced with waterproof bus ducts or re treated with insulation coatings. Check if the pins of the junction box of the waterproof busbar duct system have good contact with the busbar. Regularly remove dust from the surface of the bus duct system to ensure good heat dissipation. After the maintenance of the bus duct system, the insulation resistance should be checked and maintenance records should be made before re energizing.

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What are the defects of the outer fireproof layer of the waterproof bus duct

Traditionally, outsourced fire-resistant and waterproof bus ducts use dense waterproof bus ducts, wrapped in rock wool or high-temperature resistant mineral materials, and then use fire-resistant boards to achieve fire protection functions. In the case of sufficient space, the fire resistance and fire resistance performance of the fireproof and waterproof bus duct can be infinitely improved by thickening the outer insulation material. For example, depending on the external insulation material, the fire resistance time of the waterproof busbar duct needs to be increased from 2 hours to 4 hours. Can thicken the fire resistance parameters to achieve fire resistance performance indicators. This fire-resistant and waterproof busbar duct is widely used in workshops. The disadvantages are: Due to the outsourcing of insulation materials, the heat generated by the internal operating unit during the electrification process cannot be discharged. When the fire-resistant and waterproof bus duct is powered on for a long time, the inability to cool down can damage the insulation material between phases, resulting in the waterproof bus duct not working properly and even causing accidents. Cannot be used simultaneously under daily conditions; In order to alleviate heat dissipation issues, individual densely packed fireproof and waterproof bus ducts are equipped with a fire breathing network at regular intervals, which is a one-way ventilation outlet and a fire enclosed type, that is, it is directly closed after a fire. Waterproof bus ducts require direct combustion with open flames to be effective. It cannot be closed under general fire conditions; If a fire occurs, watering will cause water to directly inject into the conductor, leading to a major short circuit event; The installation of fire breathing valves at intervals cannot evenly dissipate heat inside the waterproof bus duct, and there is still a situation where local temperatures cannot be reduced. The fireproof board and fireproof cotton inside do not have waterproof performance. They will become waste under water spray or immersion and need to be replaced. This leads to high environmental requirements for the use and installation of such fireproof and waterproof bus duct products, and limited application scope; Large volume, external insulation layer must be installed on site. The installation process is complex, the workload is large, the required laying and construction space is large, and the construction period is long. The waterproof busbar duct and busbar are actually closed one by one, while the other is not closed. The enclosed busbar, abbreviated as waterproof busbar duct, refers to the waterproof busbar duct, which is the vest of the enclosed busbar. The enclosed waterproof busbar duct and busbar refer to the same thing. The enclosed waterproof busbar duct is a busbar system composed of metal plates (steel or aluminum plates) as protective shells, conductive strips, insulation materials, and related accessories. It can be made into a plug-in enclosed busbar, with a junction box or feeder enclosed busbar inserted in the middle and no junction box in the middle. It is a busbar that encloses the main busbar with a metal casing. The enclosed waterproof busbar duct has the following advantages: 1. It is conducive to standardization and good interchangeability. 2. Enclosed enclosures are usually made of non-magnetic or weakly magnetic materials to reduce heating. 3. The busbar is enclosed, improving the system's anti pollution ability. Suitable for areas with severe dust and high air humidity such as coal, paper, and chemical industries. Closed busbar can be divided into densely insulated busbar and air insulated busbar, suitable for rated working voltage of 660V and rated working current of 250-2500A. A three-phase four wire or three-phase five wire power supply and distribution line with a frequency of 50Hz has a compact structure, high insulation strength, high transmission current, good interchangeability, stable electrical performance, convenient installation and maintenance, and long service life. Service life. Series functions.

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What is mineral fire-resistant cable?

Mineral fire-resistant cables are all composed of inorganic substances (metal copper and magnesium oxide powder), and mineral fire-resistant cables themselves cannot burn or aid in combustion without causing a fire. The melting point of copper is 1083 ℃, and the melting point of magnesium oxide is 2800 ℃. Therefore, this cable is truly a fireproof cable and can continue to supply power even in the event of a fire near the melting point of copper.

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Unique performance of fire-resistant cables

Fireproof cables, also known as mineral insulated cables and magnesium oxide cables, are copper core copper sheathed cables insulated with mineral material magnesium oxide powder. Mineral insulated cables are composed of two inorganic materials: copper conductor, magnesium oxide, and copper sheath. Its structure is made of electrician's copper rod as the wire core, smooth gold tube as the sheath, and inorganic mineral magnesium oxide powder processed into insulation material, thus possessing many unique properties.

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Identification of high-quality waterproof busbar ducts

Pay attention to the conductor materials of the busbar: Currently, there are three types of conductor materials: copper rod, aluminum rod, and copper aluminum composite material, with significant price differences. In addition to purity, attention should also be paid to the mechanical properties of the material after bending. The interface strength of copper aluminum composite materials directly affects their processing performance and reliability. It is a key performance parameter of copper aluminum composite busbar. Only when there is no blistering, obvious orange peel, copper or aluminum delamination during the punching and shearing processes, and the low requirements for interface bonding strength are met, can it be used for electrical equipment.

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The difference between dense waterproof bus duct and air waterproof bus duct

In order to clarify the difference between dense waterproof bus duct and air waterproof bus duct, it is recommended that you first review the professional specification definition of public waterproof bus duct: the specification definition of dense bus duct is: "After covering the exposed bus with insulation material, place it close to the channel shell. The specification definition of air type bus duct is: "The bus is supported by insulation gaskets inside the casing and insulated by an air insulation layer

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The Development History of Waterproof Bus Ducts

Waterproof busbar trunking is a new circuit model developed in the United States, known as the "Waterproof busbar trunking system". It uses copper or aluminum as a conductor, supported by a non olefin insulation layer, and then installed in a metal groove to form a new conductor. At present, it has become an essential wiring method in high-rise buildings, factory electrical equipment, and power systems. However, when the distribution system of a building is difficult to use, it will be difficult to use. In addition, it can make buildings more beautiful.

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