Due to the movement, mobile devices need to constantly change positions. In each different position, the mobile devices must be able to obtain power power at any time, otherwise they cannot move. At this time, the trolley line was born, and several conductors were laid in parallel along the running track of the mobile device to turn on the power. On the moving equipment, a current collector that can take electricity from the conductor is installed. In this way, when the device moves, the current collector operates synchronously with the device, and the power is obtained from the conductor at any time and is provided to the device so that the device can continue to move. The device consisting of these conductors and current collectors is called a trolley wire. The trolley wire device consists of three main components of the sheath, the conductor and the power receiver, and some auxiliary components:
1. Sheath: It is a semi-closed tubular tubular component that is the main part of the trolley wire. Its internal can be embedded according to the need for high 3-16 body rail as a power supply wire, each rail insulated from each other, thus ensuring the safety of power supply. And in the maintenance of electricity to effectively prevent maintenance personnel electric shock accident. The length of each pipe produced by the manufacturer is different, and it can be connected to any length required. The ordinary pipe can be made into a linear shape, or it can be made into a circular arc shape according to special requirements.
2, conductor: The main material is copper, according to its cross-sectional area commonly used 10 square, 16 square, 25 square.
3. The receiving device is a set of brush-brush housings running in the conduit. It is driven by a shifting fork (or traction chain, etc.) placed on an electricity-using mechanism (traffic, trolley, electric hoist, etc.), and it is connected to an electricity-consuming mechanism. Synchronous operation, through the guide rail, brush power to the motor or other control components. The number of poles of the power acceptor brush has 3-16 poles corresponding to the number of guide rail poles.
Power supply trolley wire device can be used for electric hoists, electric beam type and electric single girder bridge cranes; stacker cranes, automatic detection lines for mechanical and electrical products, automated production lines, mobile power tools and other mobile power receiving equipment, as well as factories and mines, workshops The busway shall be fixed and fixed in the office. At present, unipolar H safety trolley wires are widely used, which greatly improve the degree of protection and insulation and are safe and reliable. There are four main features of the slide wire product:
1. Safety: The housing of the power trolley is made of high-insulation engineering plastic. Enclosure protection grades can be up to IP13, IP55, as required to protect against rain, snow and freezing attacks and hanging objects. The product is subjected to a variety of environmental conditions. Good insulation performance, no harm to the maintenance personnel touching the outside of the power transmission conduit.
2. Reliable: The power transmission rail has excellent electrical conductivity, rapid heat dissipation, high current density, low impedance, and low line loss. The brush is made of metal graphite material with high electrical conductivity and high wear resistance. The loader moves flexibly with good directional performance and effectively controls the contact arc and string arc phenomenon.
3. Economy: The structure of the power supply trolley line device is simple, and a copper row with high current density, low resistivity, and low voltage loss is used as the conductive body. It can save about 6% electricity, realize the plastic substitution of steel, plastic generation of copper, novel design, no other insulation structure, no compensation line, installed on the same side of the control room of the crane, saving installation materials and expenses, its comprehensive cost and steel The slide lines are roughly the same.
4. Convenient: The power-slip contact device integrates the multi-level busbars in a single duct, and the assembly is semi-simple. Its fixed brackets, connecting clips and suspension devices are all supplied with common parts. It is also very convenient for assembly and disassembly, adjustment and maintenance.
Double Suction Pump
As an important form of Centrifugal Pump, double suction pump is widely used in engineering because of its high lift and large flow. The impeller of this pump type is actually a combination of two back-to-back impellers, and the water flow from the impellers merges into a volute. The double-suction pump has the following characteristics: it is equivalent to two single-suction impellers of the same diameter working at the same time, and the flow rate can be doubled under the same outer diameter of the impeller; the pump casing is horizontally opened, which is convenient for inspection and maintenance. The inlet and outlet of the suction pump are in the same direction and perpendicular to the pump shaft, which is conducive to the arrangement and installation of the pump and the inlet and outlet pipes; the impeller structure of the double suction pump is symmetrical, there is no axial force, and the operation is relatively stable.
Double Suction Pump,Double Suction Centrifugal Pump,Double Suction Water Pump,Carbamide Pump
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