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Clap the door拍门

Views : 0 Update time : 2021-3-20 17:08:19

  Rongcheng water flap door series materials are ****ided into cast iron, stainless steel, carbon steel, composite materials (FRP) and many other materials, and flap door is ****ided into many kinds, such as floating box flap door, flat flap door, sleeve flap door and so on. It is a one-way valve installed at the outlet of the drainage pipe along the river. When the river tide level is higher than the outlet pipe and the pressure is greater than the pressure in the pipe, the flap ...

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  Rongcheng water flap door series materials are divided into cast iron, stainless steel, carbon steel, composite materials (FRP) and many other materials, and flap door is divided into many kinds, such as floating box flap door, flat flap door, sleeve flap door and so on. It is a one-way valve installed at the outlet of the drainage pipe along the river. When the river tide level is higher than the outlet pipe and the pressure is greater than the pressure in the pipe, the flap door panel will automatically close to prevent the river tide from pouring into the drainage pipe. At present, the racket door is divided into hanging type, single door / double door, energy-saving type and so on.

  Structure and working principle of flap door: it is composed of valve seat, valve plate, sealing ring and hinge.

  The circular and square outlets are only used for one-way water flow. They are tight in structure and reliable in operation. No manual operation is required. The opening and closing force comes from the water pressure. When the water pressure inside the flap door is greater than that outside the flap door, they open; otherwise, they close.

  Applicable media: water, river water, river water, sea water, domestic and industrial sewage

  Scope of application: applicable to water conservancy system, municipal sewage, urban flood control and drainage, sewage treatment plant, waterworks, etc.

  Product specification and category:

  There are two kinds of clapper door specifications: round clapper door and square clapper door, which can be designed and produced according to the size and shape of water outlet; the types of clapper door can be hollow floating clapper door and flat clapper door respectively.

  Racket door installation: racket door can be installed in the following ways: flange connection, concrete pouring.

  The allowable deviation between the center of flap door and the center of flow channel shall not be greater than 3.0 mm

  There should be 400 mm installation space around the flap door, and a slope of 1:5 should be made below the flap door exit.

  Accessories for flap door installation: bolts or expansion wires are made of stainless steel or carbon steel after anti-corrosion treatment; seals are made of rubber or rubber gasket.

  Accessories for installation of clapper door rubber gasket: stainless steel or carbon steel with anti-corrosion treatment for bolts or expansion wires; rubber or rubber gasket for seals. Installation requirements for rubber pad of flap door: flange connection flap door is divided into flange connection of flange ring pipe, flange connection of embedded bolt and flange connection of expansion screw. The rubber gasket structure of the flap door is composed of the flap door seat, flap door cover and connecting shaft. The flap door seat adopts double flange structure. The lower flange plays the role of connection and fixation of the flap door, and the upper flange plays the role of sealing, water sealing and drainage. The rubber gasket fixed flange of cast iron flap door adopts the national standard, which is matched with the steel flange sold in the market. The fixed flange of rectangular flap door is non-standard flange. The tilt angle of the clapper door seat is generally 75 degrees. For large clapper doors, the tilt angle can be increased, generally 80 degrees. The purpose is to make the clapper door cover open better.

  The flange on the other side of the flap door seat is a sealing water sealing flange. Its surface is provided with a U-shaped groove and a Y-shaped sealing strip is embedded. The sealing strip is coated with imported high-grade adhesive between the sealing strip and the glass fiber reinforced plastic. It has strong bonding, excellent water resistance and will not fall off due to long-term immersion and frequent opening. The sealing strip is made of imported rubber materials and vulcanized in the curing bed. Its form, flexibility and sealing performance have been explored and practiced by our factory for many years. After continuous improvement, its sealing effect is very ideal. Its flexibility can slow down the impact of instant backwater on the clapper door seat and protect the clapper door seat and the clapper door cover. Therefore, the rubber strip plays a dual role of sealing and buffering. For example, when the water pump is shut down, the tap water outlet is suddenly short of water and is closed instantly. Due to the relatively light weight of the tap cover, most of the external force has been eliminated under the slow down of the rubber strip, so that the tap cover can be closed tightly without damage.

  Rongcheng flap door series caliber specification: round dn200-3800mm, square 200-3800mm.