Anti countercurrent cast iron shooting door / steel shooting door / composite material shooting door is mainly composed of door body, door seat, hinge device, sealing surface, etc. 1. Main structure (1) the door frame of the door is made of ductile iron and has its own shape rib. The number of ribs depends on the size of the door. It is made of stainless steel and can bear the expected load. (2) the hinge shaft and bolt of the door are made of stainless steel 0Cr17Ni12Mo2 (316). The door and door plate shall have lifting rings and lifting lugs. (3) the door sealing pad and the door plate sealing pad are made of copper alloy. The metal seat can be replaced. In addition, the elastic auxiliary seat can also be used as an additional seat of the copper alloy seat. 2. Single flap door structure is used for aperture with performance ≤ DN 1200mm, and floating box structure is used for diaphragm with performance greater than or equal to dn 1200mm. The door is a one-way valve product, mainly installed at the end of the drain pipe to prevent external water from pouring into. Materials are divided into stainless steel, carbon steel, cast iron and other materials.
The product is a one-way valve installed at the outlet of river drainage pipe. When the tide level of the river is higher than the outlet pipe and the pressure is greater than the pressure inside the pipe, the door panel will automatically close to prevent the tide from flowing into the drainage pipe. The product is developed by our company. The product meets the technical standard of Q / tf-b2771 industry; it is tested according to the test requirements of GB / t13927; the nominal pressure (PN): 0.25-1.6mpa; the nominal diameter (DN): 200-3000mm; door material: cast iron door, steel door, glass fiber reinforced plastic door. Door function: installed at the end of drain pipe, with check valve to prevent external water injection. Applicable media: water, river water, river water, sea water, domestic and industrial sewage application scope: suitable for water conservancy system, municipal sewage, urban flood control and drainage, sewage treatment plant, water plant, etc.
The gate is suitable for overflow and check of various pipelines and watercourses of water supply and drainage and sewage treatment projects. It can also be used as various well covers. Only for outlet of unidirectional flow.
3. Structural features:
The baffle has the function of opening and closing the flow path forward. Through the balance of self weight, under the action of water flow, the valve cover of the door automatically opens or closes; or external force is applied to open or close the door; there is a pull ring on the door cover, the opening angle of pulling the door cover should be greater than 60 degrees, there is no jam phenomenon, the switch should be free and flexible, when the flip part is immersed in water, the internal pressure is large. The diameter of the pipe is larger, but when the reverse pressure is small, the valve allows partial leakage, and when the water pressure in the river increases, the valve can leak partially,
The door will automatically close the weatherstrip.