Hydraulic downward opening weir door is a kind of equipment used in pipelines, box culverts or channels, and its main functions are:
Hydraulic downward opening weir door is a kind of equipment used in pipelines, box culverts or channels, which can control the weir plate to slide up and down through hydraulic cylinders to play the role of flushing, preventing backfilling, and regulating the flow. The working principle of the hydraulic downward opening weir gate is as follows:
The upstream water enters the weir gate, and the weir plate moves upwards under the pressure of the water, opening the weir door, and the water flows out from above the weir plate.
When the upstream water level drops, the water pressure on the weir plate decreases, and the weir plate moves downward, closing the weir door to prevent the upstream water from backflowing downstream.
When it is necessary to flush or adjust the flow, the upstream water flows into the weir door through the hole under the weir plate, the weir plate moves up, the weir door is opened, and the water flows out from above the weir plate, flushing or regulating the flow.
The hydraulic cylinder of the hydraulic downward opening weir gate is usually composed of an oil pump, an oil pipe, an oil tank, a piston, etc. The oil pump draws the oil from the oil tank and transports the oil to the piston of the hydraulic cylinder through the oil pipe, so that the piston rises or falls, and drives the weir plate to move up and down. The weir plate of the hydraulic downward opening weir door usually adopts a sliding structure, and the weir plate and the weir frame are sealed by sealing strips and springs to ensure the sealing performance of the weir door. In addition, the hydraulic downward opening weir door is also equipped with a control cabinet and ultrasonic level gauge and other devices to control the opening and closing of the weir plate and monitor the upstream water level.
Flushing: Cleaning in pipes, box culverts or channels to remove debris, dirt, etc., to ensure the normal operation of pipes, box culverts or channels.
Anti-backfilling: When the upstream water level is higher than the downstream water level, the hydraulic downward opening weir door can be opened to make the water flow from upstream to downstream and prevent the water from flowing backwards to the upstream.
Adjust the flow rate: The hydraulic downward opening weir door can be opened and closed as needed to control the downstream water flow to meet the needs of irrigation and drainage.
Hydraulic downward opening weir door is widely used in urban drainage pipeline system, which can realize unattended automatic control, save underground excavation space, and seal firmly.
Hydraulic downward opening weir gate is a kind of equipment used in pipelines, box culverts or channels, which can play the role of washing, preventing backfilling, and regulating the flow rate. It is made up of a weir frame and a weir plate, and a guide groove and a hydraulic cylinder are arranged in the weir frame, and the hydraulic cylinder drives the weir plate to slide up and down along the guide groove. The weir frame of the hydraulic downward opening weir door comprises a main board parallel to the weir plate and a side plate perpendicular to the weir plate, and a strip-shaped sealing strip is arranged in the main board, and the sealing strip part is closely connected with the weir plate to form a sealing structure. The inner side of the main board of the hydraulic downward opening weir door is provided with a plurality of springs, one end of the spring is connected with the inside of the main board, and the other end is connected with the back of the sealing strip, and the spring is in a compressed state, so that the sealing strip is in close contact with the weir plate. In addition, the weir frame of the hydraulic downward opening weir door is also provided with a control cabinet and an ultrasonic level gauge, and the control cabinet is used to control the movement of the hydraulic cylinder.
Hydraulic downward opening weir gate is widely used in China's urban drainage pipeline system, which is divided into two types: electric downward opening weir door and hydraulic downward opening weir door. The electric downward opening weir gate controls the opening and closing of a weir plate through an electric actuator, while the hydraulic downward opening weir door controls the opening and closing of a weir plate through a hydraulic cylinder. The hydraulic downward opening weir door not only saves the underground excavation space, but also seals it firmly. The opening and closing cylinder can be equipped with an automatic control system, which can realize unattended automatic control. The upstream water overflows from the upper end of the door panel, which can be raised and lowered as needed and can be stopped at any position to control the flow rate of water distribution or adjust the upstream water level, which can realize functions such as flushing, preventing backfilling, and adjusting the flow rate [3].