Purpose: The energy-saving side-opening flap gate is a crucial equipment ensuring the safe operation of pumping stations. Its function in the station is to prevent water from reversing during shutdown, primarily used for flood control and drainage, agricultural irrigation, urban water supply and drainage, as well as water transfer between river basins, and water supply and distribution for various large-scale industrial enterprises.
★Key Technical Features:
1. No need for any opening/closing mechanism; it can operate automatically. The most significant feature of the energy-saving side-opening flap gate compared to the suspended flap gate is:
The valve body hinge shaft is vertically arranged, with an optimal inclination angle designed. It utilizes the gravitational force of the door to act as the closing power, making it unnecessary for any opening or closing mechanism for doors with large, medium, or small diameters.
2. Safe and stable, energy-saving and efficient. The energy-saving side-opening flap gate has low resistance during operation, a large opening angle, and minimal impact force when closing, eliminating water hammer and whirlpools during outflow. It requires no manual, electric, gas, or liquid control; no human operation is needed, saving a great deal of labor and resources. This enhances the reliability and efficiency of the pumping station operations, reduces maintenance costs, and lowers energy consumption. In actual operation, the energy-saving side-opening flap gate has been tested by the National Water Resources Ministry's Testing Center and has been shown to save 22.5% of electrical energy compared to suspended flap gates.
3. Easy maintenance and long service life. The Fengtai brand door closer's valve shaft is made of stainless steel, with a copper alloy graphite lubricated bearing for the pin bushing, ensuring no rust and reliable sealing; the door seat is made of carbon steel. The product has a simple and reasonable structure, a unique running path, and a service life of over 30 years, with easy maintenance.
Based on mechanical principles, the door panel and hinge shaft are vertically arranged and inclined inward at a certain angle. The horizontal component of the door panel's own weight serves as the closing force, thereby reducing the resistance to the door's opening and achieving automatic door closure.
The gate operates smoothly in both submerged and non-submerged states. Its working principle is as follows: the gate closes automatically when the medium pressure inside the culvert is less than or equal to the external back pressure of the gate. Conversely, the gate opens automatically when the medium pressure inside the culvert exceeds the external back pressure of the gate.
Primary Technical Specifications
Friction Coefficient: ≤0.01; Head Loss: <0.04M
Opening Angle: 85-90° (and above) Operating Temperature: 0-80℃
Equipment Efficiency: Over 73%, compared to suspended flap gates, the medium flow rate is 1/3 higher, and the flow rate is 1/3 greater.
Energy-saving: 22.5%; Submerged Head: ≤15M
Hinged doors can be connected with flanges or pre-installed. This means a steel tube is welded onto the back of the door, followed by pre-buried concrete. The structure is simple and reliable, offering both cost and labor savings.
No need for any opening and closing devices; it can automatically open and close, saving a great deal of labor and materials, and reducing overall costs. The gate passage ranges from 300 to 1800MM, and does not require manual, electrical, gas, or liquid control; no human operation is needed, and no maintenance is required. For circular or square gates with a passage of 2000-5000MM and an installed head of 3-12M, simply adding a simple, reliable, power-free, and manual-free variable speed buffering device can achieve both quick opening and slow closing operations with safety and reliability, as well as eliminate impacts and water hammer.
Easy maintenance and long service life. The main body of the door is made of cast iron with a QT500 grade or higher, the hinge shaft is made of stainless steel, and the sleeve is a ball pivot type self-lubricating bearing with a copper alloy base. Double sealing (carbon steel + wear-resistant rubber), the mating parts will not rust, and can be used for over 30 years.
Safe and stable, energy-saving and efficient. Low resistance during operation, wide opening angle, minimal impact when closing, eliminates water hammer and whirlpool at outlet, enhancing operational reliability and efficiency, reducing maintenance costs and energy consumption of the pumping station.
