Introduction to Deep-hole cast iron gate

Number of hits：39282015-11-06 16:18:39　Source: http://www.xhshuixing.com/

    With the hair in the morning of water conservancy and hydropower, the high dam reservoir has been on the rise, the position of drain holes in the dam is more and more deep, deep hole cast iron gate configuration also appears more important. Due to the application of cast iron gate head high, often the problem is:
   A, in the condition of high speed water flow, due to the change of the flow pattern and boundary mutation, make water disturbed, cause the sharp change of water pressure, the cavitation flow also will happen;
Second, due to the iron gate leakage or water flow around current, as well as fluctuating pressure in the water and cause the vibration of the cast iron gate. In order to relief, cavitation erosion and vibration that deep-hole gate must possess the following conditions:
    1. Cast iron gate shape, form of gate slot and gate waterway to form a smooth, good hydraulic conditions;
    2 cast iron gate structure should have sufficient strength, stiffness and reliability;
    3. Play a reliable water stop device to prevent leakage and injection;
    4. To have earthquake erosion reduction measures;
    5. Operating mechanism to be flexible and reliable so in more than 50 head configuration on the drainage hole of curved iron gate was tired see not fresh. Throughout the domestic and foreign deep hole arc iron gate design, manufacture and              installation, whether in the structure form, the water stop device, and the door hinge type on the form are have distinguishing feature each, worthy of our study compared, in order to eclecticism, refining, create with Chinese characteristics of deep hole arc iron gate.
    Three, deep hole arc classified according to the structure characteristics of cast iron gate, can be divided into main beam and main girder; According to the water stop type, can be divided into pre compression type, g pressure expansion and compression type; By a hinge type, can be divided into cylindrical hinge and eccentric hinge; According to the form, can be divided into no sudden enlargement gate slot, the sudden enlargement side gate slot at the sudden enlargement and gate slot. Any deep hole arc cast iron gate will adapt to its characteristic parameters optimal combination according to the above classification. Use at present most is the following three types of deep hole radial gate:
    1. The pre compression type water stop, no sudden enlargement of gate slot brake cylinder hinge arc;
    2. Hydraulic telescopic water stop, the cylinder hinge at the sudden enlargement side gate slot arc cast iron gate;
    3. The water pressure type, the sudden enlargement of eccentric hinge arc gate slot iron gate
     Four, deep hole arc cast iron gate structure part of the structure characteristics of deep hole radial gate can be divided into the beam system structure and the arms of two parts.
    1. According to the iron gate height to width ratio and the division of manufacturing unit, beam system structure mainly can be divided into horizontal beams type mansion the main longitudinal beams type. The main cross rail structure for a small cross member panel a longitudinal partition a main beam; Main girder beams is a panel structure with a small longitudinal beams of a beam main girder; Main girder type and a more concise clapboard type, panel - transverse diaphragm a main girder.
    2. Deep hole arc cast iron gate is generally for the double arm, but the structure is more, basically can be divided into four categories;1) truss type;(2) frame type;3. Article compose type: 4 solid-web.