7 results about "Buoyancy function" patented technology

The utility model discloses a kind of liquid storage structure and polishing liquid supply system, including the storage tank for the storage of polishing liquid, the top of one side of the storage tank is equipped with for the injection pipe of polishing liquid supplement, the bottom of the other side of the storage tank is equipped with for the supply pipe of polishing liquid supply, the inside of the storage tank and the position of the injection pipe corresponding installation are equipped with for the injection pipe plugging plugging assembly, the plugging assembly includes liftable sealing plate, the top of the sealing plate is fixedly connected with the sealing gasket matched with the injection pipe, the bottom of the sealing plate is equipped with for the float block of the sealing plate lift and move buoyancy function.The utility model is through ingenious design and reasonable structure layout, realize the automatic supply and supplement of polishing liquid, good sealing, structure stable and reliable and agitating function, effectively solve the problems in the prior art, with higher practical value and popularization and application prospect.

This invention relates to a floating photocatalytic material, its preparation method, and its application in cyanobacteria control. The method includes the following steps: uniformly mixing a phenolic compound, an aldehyde solution, a solvent, and an alkaline catalyst, followed by a prepolymerization reaction to obtain a prepolymer; adding a foaming agent to the prepolymer and mixing uniformly to obtain an emulsion; adding an acidic catalyst to the emulsion and undergoing a gelation reaction to obtain a wet gel; and curing the wet gel by heating to obtain the floating photocatalytic material. This invention utilizes an integrated foaming process to simultaneously form a porous structure with interconnected internal components during synthesis, giving the material sufficient low density to achieve self-floating. The material itself is the photocatalytically active component, simultaneously possessing structural support and buoyancy functions, achieving integrated construction of material function and structure. This effectively avoids problems such as active component shedding, loss, and secondary pollution, resulting in high catalytic efficiency. This material can be directly used as a floating board for cyanobacteria control, achieving efficient and eco-friendly continuous inhibition of cyanobacteria.

The invention discloses a sensorless control method for a magnetic suspension bearing, and the method specifically comprises the steps: constructing a buoyancy function of radial magnetic suspension bearing electromagnetic force and air gap as well as coil excitation power and a magnetic suspension bearing kinetic model, and rewriting the kinetic model into a state equation; taking multi-frequency disturbance as a bounded variable to be expanded into a state equation, and obtaining a nonlinear expansion state observer; tracking the nutation mode, and compensating the following nutation mode in the nonlinear extended state observer to obtain an extended state displacement observer; and finally, position information is estimated through the excitation current of the magnetic suspension bearing by adopting an extended state displacement observer, the difference between the position information and the ideal air gap position is obtained, the difference is input into a PID controller, and position sensorless control is realized. The magnetic suspension bearing solves the problems of strong gyroscopic effect and vibration suppression of the magnetic suspension bearing in the prior art.

The invention discloses a marine riser vortex-induced vibration suppression buoyancy block with a spiral sphere array, and belongs to the technical field of ocean engineering equipment. Specifically, the buoyancy block assembly is of a closed cylinder structure formed by symmetrically splicing two buoyancy block half shells in the axial direction, three columns of spherical protrusions distributed in a spiral array mode are evenly arranged on the outer surface of the buoyancy block assembly in the circumferential direction at the interval of 120 degrees, and the thread pitch of the thread line is two times of the length of the buoyancy block. The spherical protrusions are closely arranged in the thread line direction, and the protruding height of the spherical protrusions is preferably 0.1 time of the outer diameter of the buoyancy block. Arc-shaped positioning rings are arranged at the two axial ends of the buoyancy block assembly so as to limit the axial movement of the buoyancy block assembly. While it is ensured that the buoyancy block device of the marine riser provides the buoyancy function, the marine riser vortex-induced vibration response can be restrained, and the resistance cannot generate a remarkable amplification effect.

The invention discloses an automobile anti-sinking floating device and a using method, the automobile anti-sinking floating device comprises a box body, a water immersion detection control module arranged in the box body, an anti-sinking folding air bag module, an ejection air taking flying probe module and an air conveying module used for supplying air to the anti-sinking folding air bag module, the immersion detection control module is used for detecting an automobile immersion signal and an immersion depth signal; when a water immersion signal and a water immersion depth signal exceed set values, the water immersion detection control module controls a gas taking flying needle in the ejection gas taking flying needle module to pierce into an automobile tire, gas is taken from the automobile tire, the gas is conveyed into the anti-sinking folding airbag module through the gas conveying module, and the anti-sinking folding airbag module is connected with the water immersion detection control module. And an anti-sinking air bag in the anti-sinking folding air bag module is inflated and opened. The anti-sinking floating device for the automobile adopts a pure mechanical structure, can not be influenced by various external factors, and can reliably realize the anti-sinking floating function of the automobile.

This invention discloses a multi-tube sampler for sandy substrate sediments with anti-buoyancy function, comprising a composite support column, a combined cylinder fixedly connected to the bottom of the composite support column, a composite disk fixedly installed at the bottom of the combined cylinder, a main sampler fixedly installed at the bottom of the composite disk, four evenly arranged adjustment mechanisms fixedly installed at the bottom of the composite disk, auxiliary samplers fixedly connected to the outer surfaces of the four adjustment mechanisms, a sealing disk threadedly connected to the middle of the inner wall of both the main sampler and the auxiliary samplers, a combined ring threadedly connected to the inner wall of the bottom opening of both the main sampler and the auxiliary samplers, and multiple sets of triangular springs arranged in a ring fixedly connected to the top of the combined rings. In this invention, the opening and closing of the sealing structure formed by the multiple sets of triangular springs can be controlled by the extension and retraction of a waterproof electric actuator, depending on whether sampling is required, thereby facilitating sampling and sealing the sampler tube after sampling.

The invention provides an emergency floating device for an underwater unmanned vehicle, a floating method and application, and belongs to the technical field of underwater unmanned vehicles, the emergency floating device comprises a group of air bag storage assemblies, an air bag, a high-pressure air cylinder, a control valve group and an air pressure pipeline; the air bag storage assembly comprises an air bag storage barrel, and the air bag storage barrel is connected with a barrel upper cover through a shear screw. The air inlet end of the lower portion of the air bag is fixed to the bottom of the air bag storage barrel. The air bags are respectively connected with a control valve group through air pressure pipelines, and the control valve group is connected with the high-pressure air cylinder. According to the emergency floating device for the underwater unmanned vehicle, the emergency floating function of the underwater unmanned vehicle under the emergency condition is achieved, the arrangement space and the structural dead weight of the emergency floating device for the underwater unmanned vehicle are reduced, and the reliability and economical efficiency of the emergency floating function of the underwater unmanned vehicle are improved; the device is compact in overall structure, low in dead weight, flexible in fitting-out position, capable of being repeatedly used and high in adaptability.