57results about How to "Guaranteed normal navigation" patented technology

A zoology recovering device for the city water bank belongs to the water zoology engineering field. The invention is to set the marsh zoology decontamination water purification system, the water-air-wind exchanging system, the land-water biological habit system and the zoology bank protecting system in the city water bank. The concrete flooding bank is set by 8-25degree with the water flow direction; The bank head is connected with the concrete through the clapboard; the bank trail is connected with the slag biological water leaking wall; the field formed by the bank, concrete flooding bank and the concrete clapboard is divided into the sunken plant field and the floating plant field by the concrete clapboard. The biological reef hill is set on the center of the sunken plant. The invention can not only recover and clear the water zoology but prevent the storm to erode the bank compared to the chemical, physical and zoological method at present.

The invention relates to a self-centering unmanned ship suitable for adverse sea conditions and a self-centering work manner of the self-centering unmanned ship, and belongs to the field of unmanned ship equipment and techniques. The unmanned ship comprises a main hull, a self-centering deck, equipment, a pipeline mast, a propeller, a radar, an air intake and exhaust system and a host machine system. According to the self-centering unmanned ship disclosed by the invention, the water-tight deck is designed, so that the hull of the unmanned ship has a self-centering function, the possibility of ship overturning of the unmanned ship is avoided, and additionally allocating self-centering equipment is not needed; besides, through the inner structure of the unmanned ship and the self-centering working manner, when a heeling angle of the hull exceeds a certain angle, a host machine and the air intake and exhaust system can be automatically turned off, so that the purpose that the whole ship is in a water-tight condition is realized; and when the heeling angle of the hull is returned to a small angle, the air intake and exhaust system and the host machine are automatically turned on, the mechanism is easy to operate, and the purpose of protecting a propelling system can be realized. During high-speed sailing in deep high sea, the unmanned ship can effectively and continuously work, and the unmanned ship is a reliable, economical and high-efficiency unmanned ship.

The invention provides an unmanned ship trajectory tracking safety control method based on a slew rate constraint. Firstly, an unmanned ship trajectory tracking controller is designed in considerationof unknown interferences existing in an external environment, an interference observer is introduced to estimate an external time-varying interference, then an estimated value of the disturbance observer for external disturbances is added to the controller to offset external environmental interferences, so that the heading rate of the unmanned ship is prevented from being too fast due to excessive external interferences, thereby affecting the safe navigation of the unmanned ship; secondly, a first-order approximate derivative of the expected heading is obtained by introducing an instruction filter, which not only avoids the complex derivative of the expected heading, but also limits the amplitude of the expected heading, and preparation is made for the design of the following barrier Lyapunov; and finally, a barrier Lyapunov function is introduced to limit a heading rate error, thereby indirectly limiting the heading rate of the unmanned ship within a certain safety range, and ensuring the safe navigation of the unmanned ship.

The invention discloses a construction method for an underwater reinforced concrete composite pile of a cast-in-situ support of a concrete ballast box beam of a cable-stayed bridge. The construction method comprises the steps that steel pile casings are inserted and driven; primary connecting systems are arranged around the steel pipe casings, and steel face plates are laid on the primary connecting systems; a percussion drill is used for carrying out drilling on the interiors of the steel pipe casings downwards, and after designed elevation is achieved in a drilling manner, steel reinforcement cage mounting, guide pipe tripping in and hole clearing work are carried out on formed holes; concrete is poured in the formed holes to the designed elevation to form concrete piles, and the concrete piles comprise steel concrete transition connecting portions in the bottom ends of the steel pile casings and drilling and pouring portions stretching out of the bottom ends of the steel pile casings; and the rest of steel pile casings are constructed in sequence, and after all the steel pipe casings are constructed, secondary connecting systems, bridge transverse distribution beams, bridge longitudinal bailey beam sets, lumps of wood and timber formworks are arranged on support steel pipes at the tops of the steel pile casings, and are demounted after construction of the concrete ballast box beam is finished. The problems that an underwater support foundation of the ballast box beam is high in construction cost, demounting is hard, and flood crossing safety risks are high are successfully solved.

The invention discloses an anti-collision radar alarm system. The system comprises a marine radar and an anti-collision warning device, and a transmitter / receiver and a display terminal of the marineradar are connected with the anti-collision warning device through a port adapter; the anti-collision warning device comprises a display, an alarm device, a depth sounder, a data collector, a data checker, a data processor and a main controller for receiving data information processed by the data processor, predicting future trends of target motion, conducting real-time evaluation judgement on a target risk, controlling the target information to be displayed on the display in graphic and character ways, and controlling the alarm device to emit an audible and optical alarm signal. The system can obtain the current navigation data of an area so that a ship can avoid the collision of other ships, island blocks or floating objects, and effectively improve the safety of navigation.

The invention provides a water surface navigation device capable of being propelled by utilizing wave energy, comprising a floating body, a wave energy conversion device, a power generation device and a propelling device, wherein the wave energy conversion device is composed of a wing plate, an upright column, a rack and a gear, the upright column vertically penetrates through the floating body from a open pore in the bottom of the floating body, the bottom is fixedly connected with the wing plate, the rack is mounted on the side face, and the rack is meshed with the gear; fluctuation of the wave causes the vertical movement of the floating body and the upright column, the stress and movement of the upright column and the floating body have an amplitude value and a phase difference, and the relative movement drives a generator to generate power through rotation of the gear; the power generation device is composed of a speed change gear box, a generator, a rectifying and voltage stabilizing device and an accumulator; and the propelling device comprises a motor control system, a motor, a crank mechanism and a flapping wing, a motor shaft is connected with a crank shaft, the lower end of a connecting rod is connected with the flapping wing, the motor rotates so as to drive the crank shaft to rotate, and the flapping wing reciprocates up and down to produce thrust so as to propel the navigation device to advance. The water surface navigation device provided by the invention effectively utilizes the wave energy and conforms to the environment-friendly idea of zero discharge and no pollution.

The invention belongs to the technical field of ships and relates to a stern shaft sealing device. The stern shaft sealing device comprises an installation base; an air bag is fixed into an inner hole of the installation base; the installation base is provided with a first sealing ring bracket which is connected with a second sealing ring bracket through a connecting piece; the outer end of the second sealing ring bracket is fixedly connected with a sealing ring; the end surface of the sealing ring is provided with a supporting ring in an attached mode; the supporting ring is connected with a transmission ring; an emergency sealing body is installed between the installation base and the first sealing ring bracket and is a whole circle defined by a plurality of equational circular-arc structures; and each circular-arc structure can move in the radial direction. The stern shaft sealing device has an adjustable emergency sealing function, and an emergency mechanism can be repeatedly used; adjusting is convenient, and the service life is long; and thus, the emergency capacity of a ship during sailing is greatly improved, and the effect that the ship can continue to keep sailing for a long time after a main stern shaft sealing body breaks down during distant sailing is ensured.

The invention discloses a backfilled cofferdam constructed in branched bins of a subsea tunnel and a construction method thereof. The backfilled cofferdam comprises a bottom waterproof curtain, two side surface waterproof curtains, an earth rock cofferdam and a top waterproof curtain, wherein the bottom waterproof curtain extends downwards from the bottom of a foundation pit; the two side surfacewaterproof curtains extend outwards to a side wall of a current bin cofferdam respectively from two side walls of the foundation pit, and two ends of the bottom waterproof curtain are respectively connected to the bottom of one side surface waterproof curtain; the top of a tunnel is backfilled with an overburden layer until reaching a planned seabed elevation, and the earth rock cofferdam is constructed on the overburden layer; and the top waterproof curtain is arranged in the earth rock cofferdam, and extends upwards to the top of the earth rock cofferdam from the top of the tunnel, two endsof the top waterproof curtain are respectively connected to two side walls of the current bin cofferdam, and the tops of the two side surface waterproof curtains are connected to the bottom of the bottom waterproof curtain. According to the backfilled cofferdam and the construction method, branched bin cofferdams are effectively linked, and the waterproof effect and integral stability of the branched bin cofferdams are adequately guaranteed.

The invention discloses a multilane lock with navigation, power generation and flood-discharge functions. The multilane lock is characterized by comprising a plurality of parallel lock chambers, wherein an upstream gate and a downstream gate are respectively arranged in each lock chamber; a water conveying corridor straight line section is respectively arranged between two of the lock chambers; a water turbine is arranged in each water conveying corridor straight line section; one end of the water conveying corridor straight line section is connected to an upstream water conveying corridor and the other end is connected with a downstream water conveying corridor; the upstream water conveying corridor is respectively provided with water inlet and outlet ports at two sides of the upstream gate, and the downstream water conveying corridor is provided with the water inlet and outlet ports at the two sides of the downstream gate. On the basis of providing a multilane lock water conveying corridor structure integrated with the navigation, power generation and flood-discharge functions, a power generation function is achieved by matching with different valve opening and closing operation schemes of ensuring normal navigation of the lock in a non-flood season and meeting a discharge requirement and other requirements in a flood season.

The invention discloses a ship maintenance platform. The system comprises a ship end data sensing system and a ship data monitoring system, ship maintenance management system. The cross-end data sensing system is in data signal connection with the ship data monitoring system. The ship data monitoring system is in data signal connection with the ship maintenance management system. The ship end datasensing system collects and obtains operation state data of ship cabin equipment through ship end data sensing equipment, real-time comprehensive monitoring of the ship operation state is achieved, and the ship data monitoring system processes and analyzes the ship cabin sensing data to obtain operation state information of all the equipment of a ship. The method has the advantages that the operation state of ship cabin equipment is analyzed and displayed by collecting ship-end cabin data, and management of the whole process of ship maintenance is achieved.

The invention discloses a multifunctional beacon lamp based on Internet of Things and Beidou short messages. The multifunctional beacon lamp comprises a lamp base, a lamp transparent cover and a control system, wherein a light source mounting base is mounted at the top of the lamp base; two layers of circumferential light source arrays are mounted on the light source mounting base; an annular lensis arranged on the outer circumference of each layer of circumferential light source array, and a light source upper cover is mounted above the upper-layer circumferential light source array and theannular lens; the lamp transparent cover is located above the lamp base and is connected with the lamp base; the control system comprises a circuit board core board, a circuit board bottom board and acommunication antenna board, wherein the circuit board core board, the circuit board bottom board and the communication antenna board are mounted between the top of the light source upper cover and the lamp transparent cover; and the circuit board bottom board is provided with a communication antenna board interface, an external data interface, an LED driving board, a power supply module and an analog quantity acquisition unit which are connected with the circuit board core board. In addition to navigation warning and the telemetering remote control functions, the multifunctional beacon lampcan be concerted with a hydrological meteorological sensor on a standard body, and the hydrological meteorological data is sent to a shore-based system by using the Internet of Things or the Beidou short messages.

The invention discloses a ship sailing wave energy power generation device and belongs to the technical field of power generation equipment. A main structure of the ship sailing wave energy power generation device comprises a ship body outer floating pendulum part, a ship body inner wave energy transmission device, an electric energy collection device and the like; a floating pendulum swings on atelescopic driving rod in a reciprocating manner under the effect of waves, and drives the driving rod to rotate; rotation of the driving rod drives reciprocating rotation of a driven rod through a gear structure, and the movement effect is amplified; the back-and-forth rotation of the driven rod is changed into the encircling amount of an encircling belt wound at one end of the driven rod on thedriven rod, and therefore the length of the portion, outside a driven shaft, of the encircling belt is changed; reciprocating swinging of the floating pendulum is converted into up and down lifting ofa piston of a first air chamber; the change of pressure intensity makes a U-shaped magnet between the first air chamber and a second air chamber move in a reciprocating manner; and the electromotiveforce is generated on a conductor by means of electromagnetic induction, and a power generator is driven to generate power. The ship marching wave energy power generation device is simple in structure, convenient and fast to install, applicable to many work environments and very good in application prospect.

The invention discloses a monitoring device used for remote management of a ship and an application method thereof and belongs to the ship remote management technology field. The monitoring device used for the remote management of the ship and the application method thereof comprise a ship monitoring mechanism and a buoy monitoring signal correction mechanism. The ship monitoring mechanism is connected to the buoy monitoring signal correction mechanism in a signal connection mode. The ship monitoring mechanism comprises a center control bench, a signal input end and a signal output end. Sea area magnetic field distribution can be monitored. When the ship is sailing on a sea surface with an abnormal magnetic field area, an error offset of sensor data is recorded, and parameters during a sailing process of the ship are corrected in time so that a seaman can timely and correctly adjust a sailing condition of the ship. At the same time, an ocean buoy is used as a signal base station, a signal connection method of carrying the ocean buoy is adopted, offset adjustment data is uploaded and backed up to facilitate the normal sailing of other ships.

The invention relates to a ship propelling device, in particular to improvement of a screw propelling device for a ship. A twin-screw propelling device for the ship comprises a screw seat, and a main screw which is rotatably arranged on the screw seat through a transmission device; the screw seat is also provided with an auxiliary screw which is arranged behind the main screw; the axis of the auxiliary screw and the axis of the main screw are parallel to each and near each other; the rotation directions of blades of the auxiliary screw are opposite to the rotation directions of blades of the main screw; and the diameter of the auxiliary screw is smaller than that of the main screw. The twin-screw propelling device for the ship can eliminate or reduce the influence of spiral water flow to ship sailing and a rudder gear, and the ship can sail normally.

The invention relates to an airflow fence structure suitable for a downstream bend of an approach channel and a construction method of the airflow fence structure. The airflow fence structure is formed by connecting a plurality of airflow fence units; one airflow fence unit comprises a bottom pier, a sand separation pier and a drainage fence successively from top to bottom; the bottom pier is a rectangular structure, the sand separation pier is arranged on the bottom pier, the vertical section of the sand separation pier is a right angle trapezoid, the side, close to the approach channel, of the sand separation pier is a right angle, and the side, near a river channel, of the sand separation pier is an oblique plane; and the drainage fence is arranged on the sand separation pier. The airflow fence structure is suitable for terrain where the approach channel of ship lock downstream has a sharp bend and the outer side of the approach channel has shoals, the elevation is significantly higher than the approach channel, and the amount of shoal excavation is too large or excavation is not convenient, and can effectively solve the engineering problems caused by such special terrain. The function of an airflow fence is to avoid hazards of oblique flow and sediment transport, to ensure normal navigation of the approach channel of a ship lock, to ensure normal upstream water level and flow pattern, to reduce the construction difficulty, to lower the construction cost, and the airflow fence structure has good prospects of promotion and application.

The invention provides a novel gaily-painted pleasure-boat. The novel gaily-painted pleasure-boat comprises a boat body, a rudder assembly, a roof structure and an engine room power device; the roof structure is manufactured and molded through wood, and the bottom part of the roof structure is fixedly mounted on a deck of the boat body; the rudder assembly is arranged in a cabin at the tail part of the boat body; a screw propeller is mounted at the tail part of the boat body and is driven to rotate through the engine room power device in an engine room; a control panel is arranged in the cabin; a power control system is arranged in the control panel and supplies power and controls a lighting system and the engine room power device in the boat body through a charging-discharging system. The novel gaily-painted pleasure-boat has the advantages of being novel in style, reasonable in structure, good in operation effect, low in energy consumption, and high in controllability.

The invention discloses a cleaning device for a heat exchanger for a ship. The cleaning device comprises a water tank (22) which can be connected to the heat exchanger to constitute a water circulating loop and is characterized by further comprising a water pump (6), at least one drug liquid tank (4), at least one metering pump (10) and a control device, wherein the water pump (6) can be connected into the water circulating loop, the drug liquid tanks (4) are used for containing drug liquid, the metering pumps (10) are connected with the drug liquid tanks (4) and the water tank (22), and the control device is electrically connected with the water pump (6) and the metering pumps (10); and each drug liquid tank (4) is connected with the water tank (22) through the corresponding metering pump (10). The cleaning device for the heat exchanger for the ship has the beneficial effects that the functions of descaling, sterilization and algae killing, anticorrosion and corrosion inhibition and the like can be achieved without the need of detaching the heat exchanger for the ship, operation strength is reduced, the heat exchange efficiency is improved effectively, the service life of the heat exchanger is prolonged significantly, and normal navigation of the ship is guaranteed.

The invention discloses a method for positioning throwing of artificial fish reefs. The method is characterized by comprising the steps of conducting global position system (GPS) positioning after a barge sails to a first throwing position, then throwing a first anchor with an anchor chain into water, releasing the anchor chain during the period when the barge continues to sail to a second throwing position, conducting GPS positioning after the barge arrives at the second throwing position, also throwing a second anchor with an anchor chain into the water, tightening two anchor chains, sailing between the first throwing position and the second throwing position on the condition that the two anchor chains are in the tightened state throughout, collecting and releasing anchor chains correspondingly during sailing, throwing fish reefs at a plurality of throwing points between the first throwing position and the second throwing position, and conducting GPS positioning at each of the throwing points. The method is convenient to operate, time-saving, effort-saving, capable of guaranteeing that artificial fish reefs are thrown in a line and applicable to straight-line fish reef throwing in shallow waters.

The invention discloses a ship material management method which comprises the following steps: a, ship material management users sort received materials and input data information into a computer management system; b, when the material on a ship is used, the corresponding ship material management user records the information and gives clear indication of information related to the time when the material is used and personnel using the material; c, the ship material management users apply to the superior for material shortage when finding that the materials on the corresponding ships are in shortage; and d, superior staff approves applications of the multiple ship material management users and sends approved materials to ships applying for the materials. According to the ship material management method, the ship material management users enter the information of the received materials and carry out unified management, and the ship material management users apply to the superior for materials when the materials are in shortage so as to meet the daily needs of personnel on the ships and ensure normal sailing of the ships.

The invention discloses an anti-winding device of an unmanned boat propeller thruster. The anti-winding device comprises a rotary shaft; the left end of the rotary shaft and an external power output shaft are connected through a coupling, and four propellers are mounted at the right end of the outer side face of the rotary shaft at equal angles; an annular protrusion is arranged on the right sideof the outer side face of the rotary shaft, and protrusion positioning spiral insection is formed on the annular protrusion; a movable cutting pipe sleeves the rotary shaft, and embedded spiral insection is formed on the inner wall of the movable cutting pipe; and part of water suspended solids is blocked by a U-shaped shielding rod and a circular ring, left side cutting knives, arc-shaped knivesand right side cutting knives can move in a left-right reciprocating mode in the radial direction of the rotary shaft so as to cut the wound suspended solids, and power of left-right moving of the movable cutting pipe is only assisted by rotary motion of the rotary shaft. The anti-winding device of the unmanned boat propeller thruster is simple in structure, low in cost and good in clearing effecton the wound suspended solids, and thus normal navigation and production work of an unmanned boat are ensured.

The invention relates to the technical field of ships, in particular to a breeding ship which comprises a ship body, the ship body is made of a hollow truss structure, a breeding cavity is defined by the truss structure, and a plurality of breeding cabins are distributed in the breeding cavity; a main deck is fixedly arranged on the upper end face of the ship body, and the main deck is communicated with the breeding cabin; a superstructure is fixedly arranged on the main deck; a propelling system is arranged on the ship body and used for pushing the ship body to move. The exchange efficiency of seawater in the culture cabin and external seawater can be improved, so that the survival rate of fishing products is guaranteed, and the culture density can be improved.

The invention discloses a ship material management system with a time alarm function. The system is provided with: an input unit, through which ship management personnel arrange and upload information of materials of a ship; a storage unit which receives and stores data information of the input unit; and a query unit which allows the ship management personnel to inquire information of ship articles. The storage unit is provided with a time control module and an alarm module. The time control module saves an optimum use time of the materials. Because the ship material management system is adopted, ship work personnel enters information of the materials into the input unit after receiving supply materials issued by a superior, then the input unit uploads the information to the storage unit for storage so that the ship management personnel can inquire information of related materials after entering the query unit. The work personnel adopt the system for material management and the method is simple and normal navigation of the ship is ensured.

The invention discloses an automatic treatment, suction and removal device for preventing and treating water-area floating objects of ships and belongs to the field of ship engineering and equipment.Before a ship is located at a water-outlet pipe water inlet or the ship pushes a propeller, an underwater shredder is installed and connected with a pipeline-type filter. Before the underwater shredder can rotate reversely, working tooth rollers of the underwater shredder are crushed. Then, fragments of floating objects are intercepted by the pipeline type filter, and then are conveyed to the ship by the non-clogging pump for centralized treatment or discharge. If fragments obtained after the water area floaters are broken are small enough, water taking and sailing of the ship are not affected any more, and the water area floaters can be directly discharged without being connected with the pipeline type filter. The ship has the capacity of preventing and treating various types of water area floaters, the situation that the water area floaters block a water taking pipeline or wind the propeller is avoided, and good application prospects are achieved.

The invention discloses a ship shaft stabilizing and damping device. The ship shaft stabilizing and damping device device comprises a damping chamber, a sliding rail is fixedly arranged on the inner wall of the damping cavity in the circumferential direction. Three groups of damping mechanisms are arranged; each damping mechanism comprises a sliding block, a spring telescopic rod and a rubber damping pad. The spring telescopic rods rotate to adjust the length, therefore, the rubber damping pads are tightly pressed on the outer side wall of the ship shaft in an attached mode. The directions ofthe three groups of damping mechanisms are adjusted, the damping mechanisms are attached to the outer side wall of the ship shaft in a triangular shape. When the ship shaft rotates, meanwhile, the damping mechanisms can be driven to rotate along the sliding rail; the spring telescopic rods and the rubber shock pads are used for buffering and attenuating the vibration energy of the ship shaft; thebase used for supporting and erecting are arranged, the hydraulic damper is fixed in the hollow interior of the base so as to play a role in stabilizing and damping, the height of the base can be adjusted through the height adjusting mechanism, the ship shaft stabilizing and damping device is used for more comprehensively damping a ship shaft while rotating of the ship shaft is not affected, and the ship shaft stabilizing and damping device can be suitable for ship shafts of different sizes.

A ship navigation route planning and positioning system disclosed by the present invention comprises a main control module, a route planning module and a ship positioning module, the main control module controls the operation of a ship overall system, the route planning module plans the ship navigation route, the ship positioning module positions the ship position in real time, and the ship positioning module is used for positioning the ship. The route planning module comprises a historical route unit, a route planning unit, an obstacle avoidance alternative unit, an environment superposition unit and a comparison selection unit, the route planning module divides necessary areas in the route, the route is planned and segmented according to the necessary areas, the long-distance route is divided into the short-distance route, and the route planning module is connected with the route planning module and sends position information when encountering danger. According to the method, the route is finely planned from a microscopic angle, so that the navigation of the route is more guaranteed, the route is planned in a segmented manner, and different routes can be planned for each segment, so that the routes of different segments are combined, and more choices are provided for navigation.

The invention discloses a flood control weir. The weir comprises a main dam stretching across a river and further comprises a base dam, a gate and a driving device, wherein the base dam stretches across the upstream position of the main dam, and the base dam is lower than the main dam; the gate is rotationally arranged at the upper end of the base dam; the driving device is connected with the gate and is used for driving the gate to rotate towards the upper side of the base dam or the lower side of the base dam. With the adoption of the weir, the base dam is arranged above the main dam, and when the main dam is dismounted, the base dam can intercept a certain amount of water flow, so that flood influencing the downstream position is avoided; besides, the base dam is lower than the main dam, and thus ship sailing can be guaranteed.

The invention relates to the field of ocean engineering equipment, in particular to an ocean roll-roll shipment heavy lift vessel which is composed of a vessel body and cranes. A deck of the vessel body is provided with a super barrier-free deck region, the side face of the deck is provided with the cranes, and the cranes are each composed of a lifting arm, a crane shell, a base and a cab. Drive devices of an ascending mechanism, a pitching mechanism and a rotation mechanism and electrical equipment are arranged in each crane shell. The ascending mechanism, the pitching mechanism and the rotation mechanism are arranged on each crane shell. The ocean roll-roll shipment heavy life vessel is mainly characterized in that the effect that lifting loading and rolling loading of heavy cargos are achieved at the same time is unprecedented in the world, the advantages of global non-restricted waters, river-ocean combined transportation and shallow draft and the advantage that heavy cargos can be craned by the small vessel are achieved, the economy of bulk shipping is increased greatly, and the ocean roll-roll shipment heavy life vessel is complete in function and leading in the world.

The invention provides a novel gaily-painted pleasure-boat. The novel gaily-painted pleasure-boat comprises a boat body, a rudder assembly, a roof structure and an engine room power device; the roof structure is manufactured and molded through wood, and the bottom part of the roof structure is fixedly mounted on a deck of the boat body; the rudder assembly is arranged in a cabin at the tail part of the boat body; a screw propeller is mounted at the tail part of the boat body and is driven to rotate through the engine room power device in an engine room; a control panel is arranged in the cabin; a power control system is arranged in the control panel and supplies power and controls a lighting system and the engine room power device in the boat body through a charging-discharging system. The novel gaily-painted pleasure-boat has the advantages of being novel in style, reasonable in structure, good in operation effect, low in energy consumption, and high in controllability.

The invention discloses a flood control weir. The weir comprises a main dam stretching across a river and further comprises a base dam, a gate and a driving device, wherein the base dam stretches across the upstream position of the main dam, and the base dam is lower than the main dam; the gate is rotationally arranged at the upper end of the base dam; the driving device is connected with the gate and is used for driving the gate to rotate towards the upper side of the base dam or the lower side of the base dam. With the adoption of the weir, the base dam is arranged above the main dam, and when the main dam is dismounted, the base dam can intercept a certain amount of water flow, so that flood influencing the downstream position is avoided; besides, the base dam is lower than the main dam, and thus ship sailing can be guaranteed.