127 results about "Floating system" patented technology

The invention belongs to the technical field of ocean detection, belongs to a multi-sensor fusion intelligent anti-collision method and system, comprises a sensing layer, a processing layer and an application layer, and provides an intelligent anti-collision and evidence recording ocean monitoring floating system integrating computer vision, target ranging, satellite positioning and ship automatic recognition system multi-sensor fusion. According to the invention, YOLOv8 target detection, Transform data fusion and a Kalman filtering algorithm are adopted, so that accurate detection and anti-collision early warning of ships and floating objects on the sea are realized. The system has an AIS failure processing mechanism and an evidence encryption storage function, and ensures reliable operation and data compliance under complex sea conditions.

The invention discloses an ultra-aeration air flotation system and an implementation method thereof, and belongs to the technical field of wet-process phosphoric acid production, and the ultra-aeration air flotation system comprises a reaction tank, an inclined guide plate arranged on the inner wall of the reaction tank, a dish-shaped tank which is arranged at the bottom of the reaction tank and is annularly arranged around the center of the reaction tank, and a central island which is formed by protruding the inner ring part of the dish-shaped tank at the bottom of the reaction tank, the aeration mechanism is arranged on the central island and is communicated with the outside through a pipeline; the transmission mechanism is arranged above the reaction tank; the central transmission rod is connected with the output end of the transmission mechanism and is arranged along the axis of the reaction tank; the dynamic settler is arranged at the upper part in the reaction tank and is connected with the central transmission rod; and the overflow port is matched with the dynamic settler. The inclined guide plate, the dish-shaped aeration structure and the dynamic settler are integrally arranged in the reaction tank, so that the super-aeration uniformity, the foam separation capacity, the phosphoric acid purification and the liquid vortex intensity in the wet-process phosphoric acid production process are remarkably enhanced, and the reaction efficiency and the product quality are improved.

The invention belongs to the technical field of ocean information engineering, and discloses a joint simulation method for a structure collision effect in a floating installation process of an offshore converter station. The joint simulation method comprises the following steps: S1, setting sea condition parameters of an operation sea area and geometric parameters and material parameters of a floating system; s2, initializing a hydrodynamic model and a multi-body model; s3, solving the barge motion equation under the current time step by using the hydrodynamic model to obtain barge motion data; s4, calculating an LMU contact force and a DSU contact force under the current time step according to the barge motion data in the step S3, feeding back the LMU contact force and the DSU contact force to the hydrodynamic model, and updating the external load of the barge; and S5, repeating the steps S3-S4 until simulation in the set time step is completed, and then outputting a simulation result. According to the method, precise calculation of dynamic movement of the floating body and precise simulation of complex contact-nonlinear restoring force of the LMU can be considered, and high-precision simulation analysis of the whole floating installation process of the offshore converter station is achieved.

This application discloses a time-domain simulation method for a wave energy float model and related devices. The method includes: decomposing the wave energy float model to obtain a gravity field model, a wave energy float system model, a wave force calculation model, a buoyancy calculation model, an added mass calculation model, a damping force calculation model, a hydrostatic restoring force calculation model, and a viscous force calculation model; modeling each decomposed sub-model using OpenModelica and establishing a connection relationship between each sub-model, and solving the model using a solver. This application decomposes the wave energy float model into multiple sub-models according to potential flow theory for modeling. After physically connecting the sub-models, equations can be established. The equations are solved using a solver, greatly reducing the steps in the physical modeling process and the difficulty of solving the equations, thereby improving the reusability, reconfigurability, and scalability of the time-domain simulation method for the wave energy float model.

The invention discloses a cross-medium aircraft and belongs to the technical field of aircrafts. Comprising a power propulsion system which provides a power hybrid control system for an aircraft body and is used for realizing data acquisition and operation and accurate control of the power propulsion system, a navigation system and a sinking and floating system; the navigation system is used for providing navigation support for the vehicle body; the gradient skin is composed of multiple gradient materials and covers the outer surface of the aircraft body, and the sinking and floating system is used for controlling floating and diving of the aircraft body. According to the invention, the vehicle can obtain the optimal pneumatic / hydrodynamic performance in the air and seawater medium navigation state; according to the power propulsion system, the requirements of high speed, long distance and high thrust of the aircraft are met; a distributed network and a visual navigation system meet the navigation requirements of the cross-medium aircraft in the air, on the water surface and under the water and the combined combat; the hybrid control system is used for accurately controlling the aircraft; the aircraft application material can complete deformation adaptive to the changed environment.

The invention discloses a concrete floating system which comprises a concrete floating body, an embedded steel drum and a plurality of mooring chains, the lower end of the embedded steel drum is embedded in the upper surface of the concrete floating body, the end of each mooring chain is connected to the side face of the concrete floating body, and the system can adapt to the complex and changeable marine environment and is high in practicability. And the safety and the stability of the new energy equipment are improved.

The application discloses a hydrogen fuel cell unmanned aerial vehicle for quickly deploying offshore charging and belongs to the technical field of unmanned aerial vehicles. The hydrogen fuel cell unmanned aerial vehicle comprises an unmanned aerial vehicle body frame, a hydrogen fuel cell assembly is arranged below the unmanned aerial vehicle body frame, the hydrogen fuel cell assembly comprises a hydrogen fuel cell bin and a hydrogen cylinder, a hydrogen cylinder mounting mechanism is arranged below the hydrogen fuel cell bin, the hydrogen cylinder mounting mechanism comprises symmetrically-arranged cylinder connecting arms, hollow cylinder fixing devices are arranged on both ends of the cylinder connecting arms, cylinder placing port covers are arranged on the cylinder fixing devices on both ends of the cylinder connecting arms on one side, and the cylinder placing port covers are hinged to both ends of the cylinder connecting arms on one side, respectively. The technical scheme is used to solve the problem that offshore communication equipment cannot respond in time, and the problem that when an unmanned aerial vehicle is used for energy supplementing operation at sea, an additional floating system needs to be arranged, so that the weight of the unmanned aerial vehicle is large and the endurance of the unmanned aerial vehicle is short.

The invention discloses an umbrella ladder system modeling optimization method and system based on mechanics and parameter optimization, and relates to the technical field of wind power generation modeling. The efficient umbrella ladder system modeling and optimizing method is provided by combining mechanical analysis and a parameter optimization algorithm, and the performance and reliability of a high-altitude wind energy capturing system are remarkably improved; a CPO optimization algorithm is adopted to carry out dynamic parameter optimization on a floating system and an acting system under the multi-constraint condition, and the output power is maximized on the premise that buoyancy balance, rope speed limitation and parachute area constraint are met. Through dynamic updating of an adaptive learning rate adjustment mechanism and a trust region radius, the algorithm can rapidly converge to an optimal solution, the common problem of local optimum or constraint violation in a traditional optimization method is avoided, the method can adapt to changes of wind conditions of different heights, the system can be effectively prevented from overturning, and long-term stable operation is guaranteed.

The construction method of the splicing device for erecting the H-shaped steel beam of the semi-floating system comprises the steps that the temperatures of different positions on the flange and the web plate are obtained in real time, a two-dimensional temperature distribution matrix between the temperatures and position coordinates is constructed, the temperature difference of the different positions is converted into a geometric deviation trend, and a gap deviation reference matrix is obtained. And carrying out gap correction on the offset target of the gap offset reference matrix through the splicing device so as to output a corrected splicing state. And when the corrected splicing state meets the preset gap requirement, the splicing joints are locked through connecting pieces. And the locked splicing nodes are subjected to stress re-checking, and when the stress re-checking of the splicing nodes is qualified, the splicing device is transferred to non-splicing nodes. Wherein the splicing device comprises an electric jackscrew and a hydraulic wedge block, the electric jackscrew is used for conducting longitudinal compensation on an offset target, the hydraulic wedge block is used for conducting transverse compensation on the offset target, and the technical problem that manual adjustment is not timely under the temperature difference effect is solved.

The invention discloses an automatic measurement device for a bearing clearance of a passenger train wheel set, belongs to the technical field of bearing clearance measurement, and aims to solve the problems of insufficient automation degree and frequent manual intervention of the conventional measurement device. Floating systems capable of adjusting the positions of the wheel sets are arranged on the two sides of the interior of the base, guide rails allowing the wheel sets to move are installed in the surface of the base, and clearance detection structures for detecting bearings installed at the ends of the wheel sets are arranged on the portions, on the side faces of the floating systems, of the base; the clearance detection structure drives a measurement mounting frame to slide through a movable cylinder, and full-flow automation of clearance measurement is realized by combining bearing jacking of a jacking cylinder, pressing of a pressing plate of an upper cylinder and real-time data acquisition of a measurement sensor; the arrangement of the guide wheel and the motor can drive the bearing in the wheel pair to rotate, thereby guaranteeing the 360-degree comprehensive detection of the bearing clearance, and improving the measurement precision and efficiency.

A row crop header for harvesting crop in a field comprises a header frame having a center section and a pair of side wing sections operatively coupled to the center section. An upper link is pivotally coupled between the center section and each one of the side wing sections adjacent the top portion thereof. A lower link is pivotally coupled between the center section and each one of the side wing sections adjacent the bottom portion thereof. The upper links and lower links provide independent pivotal movement of the side wing sections relative to the center section to contour to the surface of the field of crops to be harvested. An automatic float system is operatively coupled between the center section and each one of the side wing sections to adjust the weight of the side wing sections on the surface of the field and allow the side wing sections to float relative to the center section.

The present invention discloses a method for realizing the planar layout of a water surface photovoltaic floating array, belonging to the technical field of water surface photovoltaic planar layout design; the method comprises the following steps: determining the structural type of a water surface photovoltaic floating system; constructing an environmental load prediction model for a water surface photovoltaic floating array; establishing a constraint equation for the layout area of ​​the floating array, solving the constraint equation using an iterative method to obtain the maximum theoretical area of ​​a rectangular array; calculating the anchor cable force of a typical zigzag array and the anchor cable force of a rectangular array formed after filling the zigzags, introducing an anchor cable force amplification coefficient into the rectangular array area constraint equation to obtain the maximum number of rows and columns of the zigzag array; and determining the final planar layout scheme based on the project site conditions and the project installed capacity. The present invention maximizes the layout area of ​​a single water surface photovoltaic floating array by constructing an environmental load prediction model and a layout area constraint equation for a water surface photovoltaic floating array, and calculating the anchor cable force and anchor cable force amplification coefficient of a typical zigzag array.

The invention provides an anti-floating system of a municipal pipeline and a construction method of the anti-floating system. The anti-floating system comprises a flexible environment response weight increasing module. The flexible environmental response weight increasing module is arranged outside the municipal pipeline and covers the top and / or the side part of the municipal pipeline, and the flexible environmental response weight increasing module is provided with a gradient permeation structure; when dry and not in contact with underground water, the flexible environmental response weight increasing module has a first weight and is flat and bendable; and after the flexible environment response weight increasing module makes contact with and absorbs underground water, the flexible environment response weight increasing module is subjected to phase change and forms a flexible balance weight module, the flexible balance weight module has second weight, the second weight is larger than the first weight, active locking force is applied to the municipal pipeline through the flexible balance weight module, and anti-floating of the municipal pipeline is achieved. According to the scheme, natural power of underground water level rising is utilized to trigger water absorption evolution and self-adaptive sharp weight increasing of the anti-floating system, so that the overall weight of the municipal pipeline is increased, and then the anti-floating performance and long-term stability of the municipal pipeline are improved.

The invention discloses a building underground water passive maintenance-free anti-floating system and a construction method.The system comprises a fertilizer groove formed in the periphery of a building, a water seepage layer, waterproof geotechnical cloth and a backfilling layer are sequentially backfilled in the fertilizer groove from bottom to top, and a passive drainage pipe is arranged in the water seepage layer; the passive drainage pipe forms a closed loop around the periphery of the building, small holes for water permeation are formed in the passive drainage pipe, the passive drainage pipe has a drainage slope, an outlet pipeline is connected to the lowest point of the drainage slope, and the outlet pipeline is connected to a preset drainage point; a plurality of dewatering wells with the bottom ends extending to the position below a structural bottom plate of the building are arranged in the fertilizer groove in the circumferential direction of the fertilizer groove at intervals, the dewatering wells are filled with water seepage layers, and the upper ends of the dewatering wells are located below the passive drainage pipe. The anti-floating system achieves the long-term, stable and maintenance-free anti-floating effect of the structure, and has the advantages of being easy and convenient to construct, low in cost, free of maintenance and the like.

The application discloses a kind of material receiving hopper floating force control valve groups, floating system, control method and compound mixer, the control valve group of the present application is connected by electric proportional pressure reducing valve operating port No. Rod cavity of the cylinder to be controlled, the rod cavity of the cylinder to be controlled is connected back oil, realizes to the control of oil cylinder thrust.The compound mixer material receiving hopper floating system, the up-and-down movement of compound mixer material receiving hopper is controlled by oil cylinder piston rod, both ensure that the tire of supporting wheel rolls along with vehicle driving, and realize the profiling movement of supporting wheel along with the change of terrain.

A fishing float system and control method, comprising a float module and a mobile terminal, wherein; the float module comprises a waterproof shell and an electronic cabin, the electronic cabin is arranged inside the waterproof shell, the waterproof shell is used to avoid the electronic cabin from being flooded; the electronic cabin is provided with a main control module, a Bluetooth, a motion sensing module, a visual feedback module and a power module, wherein; the main control module is electrically connected with the Bluetooth; the main control module is electrically connected with the motion sensing module, and the motion sensing module is used to sense the motion state of the float; the main control module is electrically connected with the visual feedback module, and the visual feedback module is used to send light signals according to the fish condition; the power module is used to supply power for the main control module; the mobile terminal is communicatively connected with the mobile terminal through the Bluetooth, and is used to receive fish condition event information.

The invention belongs to the technical field of helicopter safety design, and discloses a helicopter emergency floating system buoy cabin safety analysis method and system, and the method comprises the following steps: precisely determining a severe working condition and an aerodynamic state at a buoy cabin according to the flight working condition of a helicopter; according to the severe working condition and the aerodynamic state of the buoy cabin, the buoy cabin cover and the connecting strength of the buoy cabin cover are subjected to stress analysis and checking; carrying out buoy cabin deformation simulation calculation analysis to obtain buoy cabin deformation; carrying out air blowing and buoy cabin strength test examination under a harsh flight working condition; a buoy inflation expansion test is carried out, and the buoy cabin deformation condition is actually measured; installing a buoy cabin on the helicopter, and carrying out flight test system verification. The problem that deformation characteristics and pneumatic safety of the hard buoy cabin are not systematically analyzed is solved.

This invention relates to the field of underground structure engineering technology, specifically to an active-passive combined anti-buoyancy system and control method for underground structures. The system includes a pressure sensor array, an adjustable one-way pressure relief valve, and a cloud platform controller. The pressure sensor array is used to periodically collect water pressure data at different locations on the foundation of the underground structure and feed it back to the cloud platform controller. The adjustable one-way pressure relief valve is used to perform drainage operations. The cloud platform controller receives the water pressure data from the pressure sensor array, combines the passive anti-buoyancy bearing capacity of the structure with the buoyancy force experienced by the structure at various locations in the current state, performs a combined anti-buoyancy calculation, obtains the resistance effect ratio within the underground structure range, and controls the opening degree of the adjustable one-way pressure relief valve. This invention can regulate the water pressure level of underground engineering in real time, and by analyzing the structural bearing capacity margin in real time, it can ensure the structural anti-buoyancy safety while reducing drainage volume.

The invention belongs to the technical field of intelligent monitoring, and particularly relates to a mountainous area building underground structure water control anti-floating system based on intelligent monitoring, which comprises a multi-mode sensing module, an AI-driven prediction decision module and an edge-cloud cooperative control module, four-dimensional synchronous monitoring of the underground water level, the water pressure, the seepage direction and structural deformation is achieved through the multi-mode sensing module, an underground water level-geology-weather coupling prediction model is constructed through the AI-driven prediction decision module, a water level change curve and an anti-floating safety coefficient in the future 72 hours can be accurately output, a reliable basis is provided for system control, and the system reliability is improved. And secondly, the edge-cloud cooperative control module realizes data preprocessing through an edge computing node, a cloud platform operates a multi-objective optimization algorithm, a drainage pump start-stop threshold value and a seepage control valve opening degree are dynamically adjusted, energy consumption, drainage efficiency and underground water level fluctuation amplitude are optimized, and the overall operation efficiency of the system is improved.

The application discloses a kind of building groundwater passive maintenance-free anti-floating system and construction method, system includes being arranged in the building perimeter of fat groove, the fat groove is filled with water-permeable layer, water-stop geotextile and backfill layer from bottom to top in sequence, passive drainage pipe is equipped in the water-permeable layer, the passive drainage pipe is formed closed loop around the building perimeter, the passive drainage pipe has small hole for water permeation on, and passive drainage pipe has drainage slope, and outlet pipe is connected at the lowest point of drainage slope, outlet pipe is connected to predetermined discharge point;Fat groove is equipped with the dewatering well of bottom end extending to the structure bottom plate below of building, multiple are arranged along the circumference of fat groove in dewatering well, dewatering well is filled with water-permeable layer, and the upper end of dewatering well is located below passive drainage pipe.This application realizes the long-term, stable, maintenance-free anti-floating effect of structure, and the system has the advantages of simple construction, low cost, maintenance-free and the like.

The invention provides a shading device for preventing light leakage in gaps between air floating plates and machining equipment, and relates to the technical field of machining, a plurality of air floating plates are spliced to form an air floating platform, the upper portion of the air floating platform is used for supporting and conveying a screen panel in machining, and a splicing gap is formed between every two adjacent air floating plates; the shading device comprises a shading structure, the shading structure is directly or indirectly connected to the air floating platform, the shading structure covers the lower portion of the splicing gap, or the shading structure is at least partially filled in the splicing gap. The problem of light leakage caused by small gaps between air floating plates in the prior art can be solved, so that the stability and the precision of an air floating system are ensured, and the performance and the reliability of the whole equipment are improved.

The invention provides a method for optimizing vibration damping parameters of a heavy-load air floating terrace, and belongs to the technical field of heavy-load air floating terraces. An accurate mathematical analysis framework is constructed by establishing a system dynamics model of the heavy-load air floating terrace and an air floating system performance optimization equation set; an objective multi-dimensional feature data set is established by adopting a pressure sensor array and a vibration sensor network, intelligent parameter identification and optimization are performed by applying a self-adaptive parameter adjustment model, scientific parameter adjustment strategy selection is realized based on a comprehensive performance evaluation index, self-adaptive weight distribution adjustment is realized through a gating weight function, and the accuracy of parameter adjustment is improved. A closed-loop feedback control system is established to realize continuous automatic parameter optimization, and accurate mathematical calculation and an intelligent algorithm are used for replacing unreliable artificial experience judgment, so that the technical problem that the heavy-load air floating floor damping parameter optimization often depends on artificial experience and is not accurate enough is solved.

This invention discloses a construction method for a long-span, low-tower cable-stayed bridge. The method involves installing a variable-stiffness temporary consolidation system, including prestressed steel strands and lockable hydraulic damping cylinders, atop the main pier. Controlled-deflection guide plates are installed on the construction formwork. During typhoon warnings, the guide plates are folded to reduce wind resistance. A servo proportional valve is activated to put the lockable hydraulic damping cylinders into a viscous damping state to dissipate vibration energy. The permanent stay cables are asymmetrically tensioned to actively apply compensating bending moments, achieving coordinated wind resistance. During the semi-floating system transition phase, the prestressed steel strands are cut, and the lockable hydraulic damping cylinders are slowly depressurized, allowing the main beam support reaction force to be smoothly transferred to the movable bearings. Before the mid-span closure, the elevation is precisely adjusted using the slight difference in stroke between the lockable hydraulic damping cylinders on both sides of the main pier. This invention effectively counteracts unbalanced bending moments under extreme wind loads, prevents stress damage to the bottom of the main pier, eliminates stress impacts and abrupt changes in alignment during system transition, and achieves precise closure.

The utility model belongs to the technical field of vertical storage tanks, and particularly relates to an adjustable stratified sampling device of a liquid storage tank. Through reasonable arrangement of the sampling box and the sampling pipeline and matched use of the adjustable shaft disc and the floating ball system, stratified sampling of different liquid levels in the storage tank can be achieved on the lower portion of the outer side of the storage tank, the stratified sampling device is compact in structure and convenient to use, a worker does not need to climb to the top of the storage tank for operation, the labor intensity of the worker is greatly reduced, and the working efficiency is improved. The sampling efficiency is improved; by arranging the adjustable shaft disc and the floating ball system, the height of the sampling port can be conveniently adjusted, and sampling of samples with different liquid levels can be realized; in the sampling process, except for a sample, stored liquid in the tank is not in contact with the outside, so that the stored liquid can be effectively prevented from being polluted; according to the utility model, the nitrogen purging system is arranged to perform reverse purging on the sampling tube, so that the interference of residual stored liquid on the sampling tube can be effectively avoided, and the variety of the stored liquid can be conveniently switched.

The application provides an assembling device for assembling a covering member on a vehicle body, and relates to the field of vehicle manufacturing. The assembling device comprises a base, a transmission system movably connected to the base, a floating system connected to the transmission system, and a clamping member for clamping the covering member, wherein the clamping member is connected to the floating system. The floating system comprises a connecting member and a floating air circuit. The clamping member is fixedly connected to the connecting member. The floating air circuit is used for applying air pressure to opposite sides of the connecting member in at least one direction, so as to limit the relative movement between the connecting member and the transmission system. The assembling device can reduce the possibility of collision between the covering member and the vehicle body.

The invention discloses an aluminum fastener up-down synchronous riveting tool, and belongs to the technical field of metal piece riveting machining. Comprising an upper die frame and a lower die frame, the lower surface of the upper die frame is fixedly connected with an adjusting screw, the lower surface of the upper die frame is symmetrically and fixedly connected with locking nuts, the interiors of the locking nuts are in threaded connection with lower jacking screws, and the outer side wall of the adjusting screw is fixedly connected with a lower pressing punch; according to the aluminum fastener up-down synchronous riveting tool, the riveting process is remarkably optimized through innovative structural design. A linkage mechanism of the adjusting screw and the arc-shaped lever is adopted, the upper punch and the lower punch are driven to achieve bidirectional synchronous pressure applying, the riveting force direction is effectively balanced, material deviation is avoided, and the riveting size consistency is greatly improved. The elastic floating system is combined with the adjustable locking assembly, assembly errors can be absorbed in a self-adaptive mode, aluminum fasteners of different specifications can be rapidly adapted, and the remodeling adjusting time is shortened.

The invention discloses a disturbance isolation and anti-floating construction method for upper and lower crossed tunnels under the ultra-small clear distance condition, and belongs to the technical field of tunnel construction. A closed anti-floating system comprising an arch part local thickening reinforcing ring, an arch foot annular component and an inverted arch anti-floating anchor rod is formed in a lower tunnel crossed section; a reinforcing layer is arranged on the vault, and a flexible buffer layer is arranged on the side wall, so that the overall rigidity and the floating resistance of the lower tunnel are remarkably improved; the excavation disturbance of the upper tunnel is preferentially dispersed and consumed in the upper structure and the middle partition surrounding rock through the combination of a left lower pilot tunnel, a right lower pilot tunnel, high-modulus grouting of the middle partition surrounding rock and a truss type bearing system of longitudinal anchor rods and crossed inclined steel bar anchor rods at the bottom of the upper tunnel; vertical rigidity transition is formed, a rigid bridge is prevented from being formed between the upper tunnel and the lower tunnel, and the risk that disturbance loads are directly transmitted to the lower tunnel is reduced.

The invention relates to the technical field of basement construction, and discloses an anti-floating system and an anti-floating method of a basement, the anti-floating system and the anti-floating method are applied to the basement, the basement comprises a basement bottom plate, the basement bottom plate is provided with a plurality of water collecting wells, the water collecting wells are communicated with a municipal drainage pipe network, and the anti-floating system of the basement comprises a plurality of water stop walls and a drainage structure. The multiple water stop walls are arranged around the basement and are sequentially connected to form a water stop curtain, the water stop curtain and the periphery of the basement are arranged at intervals, the top of the water stop curtain is higher than the underground water level of the periphery of the basement, and the bottom of the water stop curtain extends into a waterproof soil layer; a water inlet of the drainage structure is communicated with underground water outside the basement, and a water outlet of the drainage structure is communicated with the water collecting well. The technical problems that in the prior art, an active anti-floating method is adopted in a high-water-level area for ultra-large deep underground engineering, the displacement is large, peripheral ground subsidence is likely to be caused, the load of a municipal drainage system is large, and a pumping and drainage pipeline is clogged are solved.

The invention discloses an underground anti-floating system with intelligent monitoring, early warning and drainage functions and a construction method of the underground anti-floating system. The underground anti-floating system comprises a water collecting well, an integrated composite water filtering and pressure reducing well, a full-parameter intelligent regulation and control system and an anti-backflow drainage execution unit. The all-parameter intelligent regulation and control system is arranged in the integrated composite water filtering and pressure reducing well and is used for monitoring the water pressure, the water flow and the filter element state of the system in real time; the anti-backflow drainage execution unit is arranged in the water collecting well, and the full-parameter intelligent regulation and control system is connected with the anti-backflow drainage execution unit. According to the integrated composite water filtering and pressure reducing well, the filter element replacement design is adopted, the problem of filter material blockage is solved, all-weather unattended operation is achieved through all-parameter monitoring, dual-mode regulation and control and remote alarm, the minimally invasive environment-friendly function is achieved, a bottom plate does not need to be damaged in a large area for built structure construction, various newly-built / built underground structures are compatible, and the construction efficiency is improved. Anti-floating prevention and treatment requirements are considered, and construction is not limited by space.

A row crop header for harvesting crop in a field comprises a header frame having a center section and a pair of side wing sections operatively coupled to the center section. An upper link is pivotally coupled between the center section and each one of the side wing sections adjacent the top portion thereof. A lower link is pivotally coupled between the center section and each one of the side wing sections adjacent the bottom portion thereof. The upper links and lower links provide independent pivotal movement of the side wing sections relative to the center section to contour to the surface of the field of crops to be harvested. An automatic float system is operatively coupled between the center section and each one of the side wing sections to adjust the weight of the side wing sections on the surface of the field and allow the side wing sections to float relative to the center section.