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The leak gate should meet the following requirements:
( 1 ) The gate is reliable in operation, quick in closing, and does not leak after closing the gate.
( 2 ) The main components of the gate are simple and reliable, and the maintenance is convenient.
( 3 ) The leakage specifications are compatible with the mine car.
( 4 ) Work safety, easy to operate and labor-saving.
(II) Types of gates and their applicable conditions Leakage ore mining is widely used in various mines in China. Commonly used leak gates can be divided into common structure and materials used:
A wooden leak gates are simple in structure, easy to manufacture, easy to install, and have low initial investment. Very suitable for small mines.
B breach the gate metal which is different from the former substituent steel timber. When the ore is large, and the amount of work for the second crushing in the leak is large, the use of the metal leak gate is better, which can solve the problem that the wooden funnel is easily damaged and the maintenance workload is large.
C iron hammer shutter breach this manual and pneumatic shutter, the latter more general application. The chain that controls the ore consists of 5 to 7 roots. The upper end of the chain is fixed on the steel beam of the leaking port, and the lower end has a lifting hammer and a lifting control gate of the cylinder.
The D -shaped sluice gate has a positive fan-shaped and an anti-fan-shaped closing mode. The manual and pneumatic components of this type of gate are standardized, high in efficiency, difficult to mine and leak, and the power consumption is high when using compressed air. Influence and downwind pressure. It is generally used in places with long service life and large production capacity requirements.
E finger-shaped funnel gate When the ore block is large, the output is large, and the large-scale mine car is used, the finger-shaped leak gate is used. The gate is changed from a rail to a finger. The cylinder is lifted to enable, and the gate is closed by the weight drop when it is closed.
This type of gate has a large mining capacity and can release large ore. Its disadvantages are: fine ore and broken ore often leak from the finger joints, especially when there is running water in the well. In order to prevent leakage, an active leak nozzle is used. The use of finger gates is gradually reduced.
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