铸铁闸门厂家主要有门框、闸板、带有锡青铜的金属密闭面及可调楔型压块等组成, 闸门具有结构坚固、 耐磨耐蚀性强、 安装使用方便的特点。 当闸门长期使用密封面磨损时,可调整楔块位置,便能恢复原密封性能。
A .一般要求
在大工作水头下, 闸门部件拉伸强度的安全系数不小于 5。 并在计算的基 础上增加 2mm 的腐蚀余量。
B .闸框
闸框方形,以便与沟槽断面相匹配。闸门处于全开位置时,闸板 至少有一半仍然包含在闸框内。 闸框的下边缘应有加工过的凹形槽, 槽内嵌入有 铜质的密封座面, 并用和密封座面相同的材料制作的沉头螺钉与闸框连接, 此密 封座面应加工到≤ 3.2μm 的表面粗糙度。闸框背面也应进行加工,以便与预埋 墙框的机械加工面直接栓接。闸框与墙框结合面在安装时应充填粘接剂。
C .闸板、导轨及吊耳
闸板为整体铸造结构、矩形、带有整体浇铸的水平和垂直方向的加强筋。 在大负荷时, 挠度不得大于构件长度的 1/1500。 闸板的滑动处应有加工过的凹 形槽, 槽内嵌入有铜质的密封座面, 并用与密封座面相同材料制成的沉头螺钉与 闸板连接。 整个闸板长度的每一边的滑动面处应加工成一台阶结构, 此结构与导 槽之间保持小于或等于 5mm 的间隙,闸板的四边均有楔块,闸板上方的垂直 中心线应固结或整体铸造吊耳,用于连接闸杆。
在闸板侧边与导轨之间的间隙不大于 3mm ,导轨用不锈钢沉头螺钉与 闸框连接或与闸框铸成整体,以防止导轨与闸框之间的相对运动。
闸门和闸框的底部有防止闸板与闸框过度楔紧而设置的可调节顶块。
杆导架
设置有杆导架以保持杆的直线度, 有足够的间隙便于操作, 杆导架用灰 铸铁制造, 并带有磷青铜衬套, 安装在铸铁支架上。 导架与支座间可作适当的 距离调整, 以达到与杆同心度要求, 设计的导架经调整后应予以固定在井壁上并 使其垂直线不变。Cast iron gate mainly consists of frame, gate plate, metal sealing surface with tin bronze and adjustable wedge-shaped pressing block. The gate has the characteristics of strong structure, strong wear resistance and corrosion resistance, easy installation and use. When the sealing surface of the gate is worn out for a long time, the position of the wedge can be adjusted, and the original sealing performance can be restored. A. It is generally required that the safety factor of the tensile strength of gate components should not be less than 5 under large working head. The corrosion allowance of 2 mm is increased on the basis of calculation. B. The gate frame is square to match the groove section. When the gate is in full open position, at least half of the gate is still contained in the gate frame. The lower edge of the brake frame shall be machined with a concave groove, in which a copper sealing seating surface is embedded, and a countersunk screw made of the same material as the sealing seating surface shall be connected to the brake frame. The sealing seating surface shall be machined to a surface roughness of less than 3.2 um. The back of the brake frame should also be machined so that it can be directly bolted to the machined surface of the embedded wall frame. The joint of gate frame and wall frame should be filled with adhesive during installation. C. The gate, guide rail and lifting lug gate are integrally cast, rectangular, with integrally cast horizontal and vertical reinforcing bars. In case of heavy load, the deflection shall not be greater than 1/1500 of the length of the member. The sliding part of the gate shall have a processed concave groove. The groove shall be embedded with a copper sealing seating surface and connected with the gate with countersunk head screw made of the same material as the sealing seating surface. A step structure should be constructed at the sliding surface of each side of the whole gate length. The gap between the structure and the guide groove is less than or equal to 5mm. Wedges are arranged on all sides of the gate. The vertical central line above the gate plate should be consolidated or cast as a whole to connect the gate rod. The clearance between the side of the gate and the guide rail is not more than 3 mm. The guide rail is connected with the gate frame by stainless steel countersunk head screw or cast as a whole with the gate frame to prevent the relative movement between the guide rail and the gate frame. An adjustable top block is arranged at the bottom of the gate and the gate frame to prevent excessive wedging between the gate and the gate frame. The rod guide frame is equipped with rod guide frame to maintain the straightness of the rod, and has enough clearance for easy operation. The rod guide frame is made of gray cast iron with phosphorus bronze bushing and installed on the cast iron support. The distance between the guide frame and the support can be adjusted appropriately to meet the requirement of concentricity with the rod. After adjustment, the designed guide frame should be fixed on the shaft wall and keep its vertical line unchanged.