Cast iron brass gate is mainly composed of door frame, door body, guide rail, wedge installation, sealing surface and other components. 1. Secondary structure (1). The door frame is made of high quality cast iron materials. There are guide grooves on both sides of the door frame. After finishing, the door body lifting guide is made. The door frame is finished by gantry planer and vertical lathe, and a groove is identified for inserting bronze sealing surface. (2) The gate body is a square plate cast by the whole body, and has a The three-dimensional finishing of the door body is equipped with slots with bronze bars for inserting into the bronze sealing surface. The finishing of both sides of the door body is matched with the slots of the door frame to form the upper and lower slides. The upper end of the door body is provided with a lifting lug. After finishing the contact surface between the door body and the lifting lug, it is fixed with bolts. The stress point of the lifting lug is close to the center line of the door body, and the pin hole of the lifting lug is machined by boring machine. In order to increase the friction between the upper and lower running of the door body, the contact parts between the guide rail and the door frame are finely machined, bolted and positioning pins are provided to avoid misalignment. (3) The door body and frame are designed according to * task head. The safety factor of the tensile, compressive and shear strength is 5. The ratio of the guide support spacing to the radius of the screw rod (flexibility) is less than 200. (4) The corrosion margin of the door body and the door frame is 2 mm in thickness, and the gap between the door body and the guide groove of the door frame is less than 1.6 mm. (5) The guide rail is made of cast iron. The surface of the guide rail is machined into the same groove as the door frame, and bronze is inserted into the stereo to increase the friction of the door when it runs up and down. The contact parts between the guide rail and the door frame are finely machined, bolted and equipped with positioning pins to avoid misalignment. (6) Wedge installation: Wedge blocks are arranged on both sides of the gate to achieve the sealing effect of the gate. The wedge is made of tin bronze. It is fixed with the wedge seat on the door body and frame by bolts. The wedge seat milling the growth hole facilitates the adjustment of the wedge. When the water stop effect of a gate is not good, the wedges can be partly adjusted. When the gate body is not closed or in place and the wedges are not wedged, all the wedges need to be adjusted. (7) Sealing surface: The sealing of the gate is composed of four sides: side, bottom and top. The round copper alloy sealing strip of the door frame is used to close the door plate. When the door body is closed, it contacts with the gate body to achieve the sealing effect, and the whole sealing is guaranteed in the structural design. The sealing strip is made of copper alloy, which is easy to install and change. The sealing surface of door plate and door frame is made of rolled or extruded copper alloy strip and is finely machined and fixed in the groove of the processed door frame and door plate (the seal seat is distinguished from the machined gate frame and gate plate, and is tightened by countersunk head screw manufactured from the opposite data of the seal seat. The head of the screw is finely machined with the task surface of the seal seat, and its surface roughness is not more than 3.2 micrometers, so as to ensure the safety of the door. Ensure that the door frame and door plate in the use of the period adhere to the original position, no deformation, no loosening. The processed grooves on the door frame and the door panel are coated with a waterproof adhesive before the sealing strip is installed to ensure water tightness. There are no scratches, cracks and gas holes on the surface of the sealing task. The gate is equipped with adjustable wedge-tightening installation and forced sealing installation to ensure close contact between the gate plate and the sealing surface of the gate frame when the gate is closed. The gap between the seal seat of the gate frame and the sealing seat of the gate plate is less than 0.1 mm, and the gap between the gate plate and the guide groove of the gate frame is less than 1.6 mm. The sealing seat is made of copper alloy. (8) The screw rod is made of round steel trapezoidal threads with accuracy up to 7e level specification. The thread length is 200 mm longer than the height of the door body. The stem is designed according to the * task opening and closing force. The safety factor of its tensile, compressive and shearing strength is not less than 5. When the gate is in closed position, the thread exceeds 50 mm of the opening and closing machine nut, and when the total length of the screw rod exceeds 5000 mm, the joint should be processed in segments. Round steel is used to make inner round holes, and round steel hinged bolts are used to fix the screw rod and joint. Fixed tooling is used to process joints, which can be interchanged with screw rods of opposite specifications. When the total length of the screw exceeds 4000mm, additional shaft guide frame is needed. The shaft guide frame is composed of cast iron bushing device on the cast iron bracket. The cast iron bracket is fixed on the wall of the pool. The conduit and bracket can stop conditioning in two directions. The lower part of the screw rod is welded with round steel pin sleeve, which is connected with the door body by pin shaft.