135 results about "Buoyancy" patented technology

The invention provides a method and system for measuring resistance in an underwater vehicle towing test, and relates to the technical field of underwater vehicle hydrodynamic performance testing, and the method comprises three links of gravity center adjustment, measurement data processing and uncertainty analysis. Firstly, it is ensured that the gravity center and the buoyancy center of a test model are consistent in height, model attitude stability is ensured, and resistance measurement errors caused by attitude changes are eliminated. Secondly, measuring the sailing resistance of the test model in the towing test, and post-processing the measured data to obtain the total resistance coefficient of the test model at the test temperature; and finally, quantizing errors of each link and synthesizing expansion uncertainty by adopting a deviation limit and precision limit combined uncertainty analysis method. Compared with a traditional single-index evaluation method, the method not only can reveal error sources and quantify the influence of each link on the measurement result, but also can accurately reflect the composite effect of errors, and ensures the reliability of the resistance measurement result.

The invention discloses a wind power generation system. The system comprises a ground device; the floating device comprises an adjusting air floating piece and a first annular air floating piece, the adjusting air floating piece is movably connected with the ground device, the first annular air floating piece is connected with the adjusting air floating piece, and a through duct is defined by the inner wall of the first annular air floating piece; the wind power generation device is arranged in the duct; and the position of the gravity center of the adjusting air floating piece in the extending direction of the duct is adjustable. According to the wind power generation system, the influence of airflow disturbance, temperature change and buoyancy lift gas leakage on the floating device can be reduced, the phenomenon that the pitching posture change amplitude is large is reduced, particularly, the included angle between the wind receiving face of the blade of the wind power generation device and the airflow direction is closer to the optimal value, the effective wind energy area flowing through the blade is increased, and the wind power generation efficiency is improved. And the fluctuation of the wind energy yield along with the posture is reduced, so that the wind energy utilization efficiency and the power generation output power are improved.

The invention discloses a water quality monitoring device for environmental engineering, and relates to the technical field of environmental engineering, the water quality monitoring device comprises a buoyancy tank, a water quality monitoring mechanism and a self-cleaning mechanism, the water quality monitoring mechanism comprises a monitoring probe and a protective cylinder, the monitoring probe is arranged below the buoyancy tank, the protective cylinder is arranged below the buoyancy tank, and the self-cleaning mechanism is arranged below the buoyancy tank. And the monitoring probe is arranged in the protective cylinder. High-pressure gas is sprayed outwards from the interior of the protective barrel through the one-way spray head, so that attachments accumulated on the protective barrel are effectively washed off, the cleaning effect on the attachments on the surface of the protective barrel is effectively improved by driving the protective barrel to rotate, the one-way spray head is driven to do lifting reciprocating motion while the protective barrel is driven to rotate, and the cleaning efficiency is improved. The one-way nozzle can spray air outwards in the protective barrel in an up-down swinging manner, so that the washing effect on attachments is further improved, and the influence on water quality monitoring caused by accumulation of a large number of attachments on the protective barrel is avoided.

The invention relates to the technical field of water level detection devices, and discloses a saturated sand layer field anti-floating water level detection device and a using method thereof.The saturated sand layer field anti-floating water level detection device comprises a floating rod, a flange plate and a gauge outfit, a limiting block is arranged at the lower end of the floating rod, a cleaning assembly is movably assembled on the surface of the floating rod, the periphery of the floating rod is sleeved with a floater, the cleaning assembly is located above the floater, and a transmission bin is formed in the floating rod; the cleaning assembly comprises a first magnet arranged in the transmission bin and a movable sleeve arranged on the periphery of the floating rod in a sleeving mode, a second magnet magnetically connected with the first magnet is fixed in the movable sleeve, and an infrared sensor for detecting the position of the floater is installed on the lower surface of the flange plate. The cleaning assembly, the floater locking structure and the infrared sensor are integrated, impurities on the surface of the floating rod can be automatically removed, clamping stagnation of the floater is avoided, and manual maintenance is reduced; when the liquid level fluctuates, the floater is locked to prevent data distortion and damage; the infrared sensor provides a basis, and the complex environment adaptability of the saturated sand layer field area is improved.

The present disclosure provides a pool cleaning robot, comprising a dust box and a mode switching member configured to achieve a position switching between above the water surface and below the water surface, wherein the mode switching member comprises: a buoyancy cavity and a buoyancy force adjustment member, and configured to adjust buoyancy magnitude of the pool cleaning robot; and a first propeller, configured to adjust a first drive force which is opposite to a first preset direction; and wherein the position switching between above the water surface and below the water surface at least comprises: the pool cleaning robot moves to a position close to the water surface based on the first drive force generated by the first propeller; and the buoyancy force adjustment member increase a volume of gas in the cavity.

The invention relates to the technical field of oil and gas field and coal bed gas field drainage and mining, in particular to a buoyancy lift pump core ring jet flow pump and a using method. According to the technical scheme, a low-density buoyancy lift pump core is installed in an inner cavity of a pump cylinder, an annular gap is formed between the low-density buoyancy lift pump core and the inner wall of the pump cylinder, a formation liquid suction inlet is formed in the lower side of the annular gap, an annular throat pipe is arranged below the formation liquid suction inlet, a diffusion cavity is formed below the annular throat pipe, and a pump core supporting seat is arranged at the bottom of the diffusion cavity; a mixed liquid outlet is formed in the lower side of the diffusion cavity, and the diffusion cavity is communicated with the mixed liquid discharge cavity. The low-density buoyancy lift pump core has the advantages that due to the fact that the overall density of the low-density buoyancy lift pump core is adjusted and reduced, the power hydraulic pressure and the using amount for pulling out the low-density buoyancy lift pump core can be reduced, and operation cost is reduced; in addition, the low-density buoyancy lift pump core is simple in structure, an annular jet flow structure is formed between the low-density buoyancy lift pump core and the pump cylinder, the liquid drainage and production amount is increased, the working condition of the low-density buoyancy lift pump core suitable for pumping media is wider, and the manufacturing cost is lower.

The invention provides a balance weight calculation method for an underwater vehicle with a permeable structure, and the method comprises the steps: firstly building a three-dimensional geometric model of the shape of the underwater vehicle, and determining the overall drainage volume and buoyancy center position coordinates of the model; calculating the overall mass and gravity center position coordinates of the underwater vehicle through the non-permeable cabin section and the permeable cabin section and considering the envelope water of the permeable cabin section; and finally, calculating the integral buoyancy center coordinate of the underwater vehicle, comparing the integral buoyancy center coordinate with the buoyancy center coordinate obtained through the three-dimensional geometric model to check whether the calculation result is correct or not, and if the two results are the same, determining that the whole balance weight calculation has no problem. According to the method for calculating the balance weight of the underwater vehicle, the envelope water in the permeable structure of the underwater vehicle is considered, the calculation precision is high, the result is stable, the balance weight period of a product can be greatly shortened, and the method has an important guiding effect on balance weight and attitude adjustment of the underwater vehicle, especially a large-scale or ultra-large-scale UUV before the underwater vehicle enters the water.

The invention discloses a self-inflating underwater buoy cabin released through electromagnetic control. The self-inflating underwater buoy cabin is characterized in that a locking and disengaging device is arranged in a floating bag cabin shell; in an initial state, the buoy is folded and placed in the shell of the floating bag cabin; the lower end of the buoy is in locking connection with the locking-disengaging device. And during separation and release, after the electromagnetic valve unlocks the buoy by the locking and releasing device, the buoy is ejected upwards by the locking and releasing device, and the buoy is automatically inflated to further float and unfold by utilizing the reduction of external water pressure. Compressed gas in the pressure bottle is injected into the floating bag by utilizing the actual process that the external pressure is gradually reduced when the buoy floats upwards, so that automatic inflation is realized, the size of the buoy is further reduced by adopting the flexible antenna, and finally, the miniaturization design of the whole buoy is realized.

The invention discloses a supercavitation navigation body cross-medium static stability margin integrated evaluation method, which comprises the following steps: (1) establishing a fluid domain and solid domain model, dividing grids, requiring good matching of a solid wall surface in contact with a fluid, setting initial and boundary conditions of the fluid domain, setting material attributes of a solid structure and endowing the solid structure with an initial working condition; (2) monitoring a pitching moment and a pitching force value in the air, calculating an aerodynamic center of the supercavitation navigation body in the air, and obtaining a static stability margin of the supercavitation navigation body in a flight state; (3) according to an empirical cavitation contour formula and the underwater characteristics of the supercavitation navigation body, the wetting volume and the equivalent buoyancy center position of the navigation body are obtained, and the static stability margin after complete development of the cavitation in water is calculated; and (4) carrying out weighted average by integrating the air static stability margin and the underwater static stability margin so as to obtain the static stability margin for judging the super-cavitation navigation body in the cross-medium water entry process. And help can be provided for judging the static stability of the navigation map entering water.

The invention relates to the technical field of offshore wind power generation, and discloses a clamped floating type offshore wind power foundation platform which comprises a floating structure and a clamped structure. The fixed supporting structure is located below the floating structure and arranged underwater in a submerged mode, and the fixed supporting structure is suitable for providing bearing capacity and anti-overturning capacity for the floating structure. The floating structure floats on the water surface so as to be suitable for installing and placing wind power equipment, and the anti-tilting capacity can be improved through the water plane and the gravity center-buoyancy center height difference. The fixed supporting structure limits the horizontal displacement of the floating structure, adjusts the overall gravity center of the offshore wind power foundation and provides the anti-overturning capacity. The clamped floating type offshore wind power foundation platform has multiple composite stability sources, on the premise that the foundation stability is guaranteed, anchor chain mooring structures are reduced, then the occupied area is reduced, the composite stability design is adopted, the situation that the structure size is too large due to a single stability source is avoided, steel materials are further reduced, the weight of the structure is reduced, and the cost is reduced. Therefore, the overall cost and the cost per kilowatt-hour are greatly reduced.

A device relating to a floater for use by a non-swimmer for buoyancy comprising a floating flatbed with coded descriptions (lateral ends: front end 14, back end 12) and a plurality of paired straps with buckles (20,22) to secure the floater flatbed (10) fixed in the swimmer’s body. This is designed to keep the non-swimmer afloat while concentrating on their hand and leg exercises. The floating flatbed is wrapped either at the upper limbs posterior or anterior portion of the body; a webbing belt with safety mechanisms buckled around the body which can be fixed at the levels; waist, abdominal, and upper back (posterior) or chest part (anterior). An adjustable strap is buckled across shoulders (24, 26) to fasten the device in place below the jaw with a plane surface of a floater which allows use purposely for either supine or prone floating mechanics fundamental in learning the basic skills for any appropriate floating position. Apparently, problems like drowning and other water accidents happen in just any part of the globe usually caused by panic and water anxiety. The device contains characteristics easy for use by non-swimmers at any age level for water safety and training device for non-swimmers particularly those who manifest water anxiety. Acquired skill in floating somehow creates mental alertness as a greater opportunity for survival during atrocities.

The utility model belongs to the technical field of desilting devices, and particularly relates to a water diversion port desilting device for hydraulic engineering, which comprises a buoyancy tank, a desilting pump, a submersible pump and a filter cover are mounted on the buoyancy tank, a screw hole is arranged on the buoyancy tank and is screwed with a bolt, the desilting pump is connected with a sludge discharge pipe and a sludge suction pipe, the submersible pump is connected with a water delivery pipe, and the filter cover is connected with the sludge discharge pipe and the sludge suction pipe. The other end, away from the dredging pump, of the water conveying pipe and the other end, away from the dredging pump, of the sludge suction pipe are both connected with a sludge suction head, the sludge suction head is connected with a vortex cover to fix a filter screen, and a high-pressure spray head is arranged at the inner end of the sludge suction head and communicated with the water conveying pipe. And it is avoided that sundries are sucked into the desilting device, blockage is likely to be caused, normal desilting work is affected, the desilting device is damaged, and therefore the maintenance cost and the downtime are increased.

The invention provides a limiting device of a buoyancy tank type gate. The limiting device comprises a hollow L-shaped shell and a telescopic assembly arranged in the L-shaped shell. The telescopic assembly comprises a guide cylinder, a guide piston arranged in the guide cylinder in a sliding and penetrating mode, a plurality of telescopic blocks arranged outside the guide cylinder in a surrounding mode and a plurality of springs connected between the guide cylinder and the telescopic blocks; the limiting device penetrates through a gate box body through a long rod body of the L-shaped shell penetrating through a reserved inserting opening of the buoyancy tank type gate. At the inserting opening, the portions, exposed out of the L-shaped shell, of the telescopic blocks located at the working positions and detachable fasteners abut against the inner wall and the outer wall of the box body respectively, and fastening between the limiting device and the buoyancy tank type gate is achieved. The floating box type gate is easy, convenient and rapid to disassemble and assemble, easy to operate and capable of being installed under the condition that no access door groove exists and disassembled under the condition that the access door groove exists, and use of the floating box type gate under the condition that the access door groove exists is not affected.

The utility model relates to a floating type water suction device suitable for a water tank or a liquid tank, which belongs to the technical field of ships and comprises a telescopic draw bar arranged in a fresh water tank, one end of the telescopic draw bar is hinged with the side wall of the fresh water tank through a first hinge, and a floating type water suction clock comprises a water suction clock and a floating box. The water absorption clock is hinged to the other end of the telescopic traction rod through a second hinge and provided with a hollow inner cavity, the water absorption opening is formed in the bottom of the water absorption clock and communicated with the hollow inner cavity, the water pump is communicated with the hollow inner cavity through a pipeline, and the floating box is fixed to the top of the water absorption clock. According to the floating type water suction device, the height of the water suction clock is automatically adjusted along with lifting of the water surface through the telescopic traction rod, the water suction clock floats on the water surface, and the water suction opening is immersed in water, so that water is sucked from the upper layer of water in the fresh water tank all the time, and rust and silt at the bottom of the tank are prevented from being sucked in the cleaning operation process of the fresh water tank; and the water absorption clock can pump and drain accumulated water at the cabin bottom, so that daily water absorption use and cleaning operation of the fresh water cabin are facilitated.

The invention discloses a quantitative prediction method for water logging of a well section of an infilled horizontal well of an offshore water-drive oil field. The method comprises the following steps: S1, dividing a well spacing area of the horizontal well into a plurality of grids; s2, establishing a displacement pressure, gravity and buoyancy coupled flooding thickness quantitative prediction mathematical model, and drawing a waterline propulsion chart; s3, based on the waterline propelling condition, the remaining oil distribution coefficient of the well spacing area is calculated; s4, screening remaining oil gathering grids according to the remaining oil distribution coefficient, and quantitatively judging the water logging condition of the well section of the horizontal well; and S5, reevaluating the enrichment degree of the remaining oil, and further evaluating and determining the potential tapping grid of the horizontal well. According to the quantitative prediction method for flooding of the well section of the infilled horizontal well in the offshore water-drive oil field, three-dimensional representation of the flooding position and the flooding degree of the well section of the infilled horizontal well in a high-water-content oil reservoir can be achieved, the remaining oil enrichment area suitable for implementing the horizontal well can be accurately screened and evaluated, then well position deployment of the horizontal well is guided, and the infilled adjustment effect is improved.

The application provides a method for determining the structural temperature field and thermal deformation of a compressor rotating disc cavity, which can be applied to the technical field of heat analysis of turbomachinery. The method comprises the following steps: obtaining the geometric parameters, operating parameters and working substance property parameters of the gas in the disc cavity; based on the balance between the buoyancy effect and the viscous effect driven by the centrifugal force, the average heat flux density of the outer ring cover of the disc cavity is obtained according to the outer ring cover radius, the axial gap of the disc cavity, the rotating disc speed, the outer ring cover temperature, the rotating core zone temperature, the Prandtl number, the density, the dynamic viscosity and the thermal conductivity; based on the heat conduction analogy relationship of the laminar Ekman boundary layer, the local heat flux density of the rotating disc is obtained according to the rotating disc speed, the kinematic viscosity, the thermal conductivity and the difference between the rotating disc temperature and the rotating core zone temperature; and the structural temperature field distribution and the thermal deformation of the rotating disc cavity are obtained according to the average heat flux density of the outer ring cover of the disc cavity and the local heat flux density of the rotating disc.

The utility model discloses a special magnetic floater liquid level meter for liquid sulfur, which comprises a measuring mechanism and a heating mechanism, the measuring mechanism comprises a measuring cylinder, a blow-off pipe connected to the bottom of the measuring cylinder, a blow-off valve used for controlling a passage of the blow-off pipe, a connecting pipe connected to one side of the measuring cylinder, a connecting flange connected to the end of the connecting pipe, a liquid level displayer arranged on the outer side of the measuring cylinder and a magnetic floater arranged in an inner cavity of the measuring cylinder. The guide plates are arranged on the inner wall of the steam jacket to guide steam, so that the steam is progressively fed layer by layer, the steam with reduced temperature is extruded into the recovery pipe of the steam equipment, the temperature drop caused by mutual mixing of the steam is reduced, and the situation that the temperature of the steam recovered by the recovery pipe is relatively high, so that most heat is lost outside is avoided; and meanwhile, a heat insulation layer is arranged on the outer side of the magnetic floater, the magnetic floater can be prevented from losing magnetism due to high temperature while the floating effect is provided, the liquid level cannot be displayed due to the fact that the magnetic floater cannot magnetically attract the liquid level display, and the practicability of the device is improved.

The utility model discloses a water circulation surge machine for fishery breeding, which comprises a floating support ring, a power motor is arranged above the floating support ring, and the output end of the power motor is fixedly connected with a lifting rod. According to the device, the floating supporting ring, the power motor, the positioning barrel, the positioning rod, the telescopic spring and the fixed clamping barrel are arranged, the positioning rod is matched with the positioning barrel and the fixed clamping barrel, and the resilience force of the telescopic spring is utilized, so that the power motor and the floating supporting ring can be conveniently and rapidly mounted and dismounted; the power motor can be conveniently suspended on the water surface through the suspension force of the floating supporting ring, the water body at the water bottom can be conveniently lifted to the upper portion through rotation of the power motor in cooperation with the lifting rod, in addition, sterilization is conducted through ultraviolet rays of the sun, the quality of the water body can be improved, and through cooperation with the swell plate and the auxiliary swell block, the water quality is improved. The rising water body can be diffused to the whole farm, and meanwhile, the flowing of the water body can increase the oxygen content in the water body.

The present application relates to a kind of for shallow water area bubble pulsating pressure subwave forward prediction method, belong to deep sea resource exploration and ship structure protection field, to solve the existing engineering shallow water area bubble pulsating pressure forward prediction problem.The present application inputs bubble initial condition, environmental parameter and pressure measuring point position, judges water area boundary influence, designs correction term expression, substitutes into equation and carries out time advance, calculates and considers the propagation time of physical quantity, finally based on Bernoulli equation exports pressure curve.The present application is based on kelvin impulse theory, corrects the buoyancy parameter deviation induced by the nonspherical deformation of bubble, using mirror bubble method to calculate the kelvin impulse theory solution of large-scale bubble under the influence of different water area boundary, to quickly predict the purpose of large-scale bubble jet direction underwater, provides theoretical basis and basic technical support for engineering construction.

This invention discloses a method for handling subsea pipelines during uplift, comprising: Step S1, pipeline gas discharge and repositioning: When an abnormal uplift occurs in a laid subsea pipeline, the pipeline is pressurized to allow the gas inside to flow back to the onshore section and be discharged through the onshore section's exhaust valve, causing the pipeline to fall back to its initial installation elevation; Step S2, trench dredging and pipeline leveling: An underwater excavator is used to excavate along both sides of the pipeline to below the design elevation of the pipeline bottom, and simultaneously, a mud pump is used to pump the silt to a mud transport vessel, transport it to a designated anti-seepage treatment site, and check the dredging quality. If the pipeline is suspended, graded sand and gravel are used for leveling; Step S3, precast concrete cover plate fabrication; Step S4, underwater positioning and cover plate installation preparation; Step S5, precast concrete cover plate installation; Step S6, end sealing. When an abnormal uplift occurs in a laid subsea pipeline, this invention can suppress pipeline uplift and increase the pipeline's stability on the seabed.

The invention discloses an aquaculture device capable of controlling floating and sinking, which comprises a floating frame, a culture container is arranged in the floating frame, a lower net plate is fixedly connected in the culture container, an upper net cover is fixedly connected to the top end of the culture container, a side plate is fixedly connected to the culture container, an air bag is fixedly connected to the lower part of the side plate, and the air bag is communicated with an air pump. The air pump is fixedly connected to the floating frame, the floating frame is provided with a plurality of winches, the winches are provided with ropes, the ends of the ropes are fixedly connected to the side plates, the breeding container is provided with a lower through opening, the lower through opening is provided with a three-way connector, the three-way connector is provided with a second outlet and a third outlet, and the second outlet is communicated with a sewage pump. And a valve is mounted on the third outlet. According to the device, the culture container can ascend or descend, meanwhile, the device can cope with extreme weather, the device can be adjusted to sink and float into a water temperature layer suitable for fishes according to the water temperature condition, and meanwhile convenience of fish school management in the culture process is achieved.

This invention discloses a model-based method and system for determining the fixed buoyancy volume of an irregular underwater object. The method includes: acquiring three-dimensional geometric model data of an underwater device; monitoring the immersion depth D of the underwater device in water in real time using sensors; and obtaining the total volume V of the underwater device based on the three-dimensional geometric model data and the immersion depth D. t and immersion volume V d Based on the total volume V of the underwater device t and immersion volume V d Obtain the initial fixed buoyancy volume of the underwater device; analyze the surface state of the object, and use a fluid dynamics model to calculate the hydrodynamic force F acting on the underwater device. d Based on the initial fixed buoyancy volume and hydrodynamic force F d The final fixed floating volume is obtained. This invention comprehensively considers fluid dynamics factors, simplifies the calculation process, has strong adaptability, and improves calculation accuracy.

The invention discloses an absolute measurement method and device for the density of molten salt and solution, and belongs to the field of molten salt physical property tests.The measurement method comprises the steps that 1, a cone and cylinder composite heavy hammer is adopted to measure the density of the molten salt or solution; 2) arranging two measuring positions on the cylinder section of the heavy punch, taking the section between the two measuring positions as a middle measuring section, the length of the middle measuring section is equal to the distance between the two measuring positions, the diameter of the middle measuring section is equal to the diameter of the cylinder of the heavy punch, and measuring at the two positions in sequence; (3) the density of the fused salt or the solution is determined by the volume of the middle measuring section of the heavy hammer and the buoyancy borne by the middle measuring section, so that the density of the fused salt and the solution is deduced; according to the method, a long-distance microscope system is adopted to directly measure the thermal expansion of the heavy hammer at high temperature, calibration by a standard substance is not needed any more, when the method is adopted to measure the density of the fused salt and the solution, the volume of the heavy hammer does not need to be calibrated, additional force caused by surface tension is completely removed, the measurement process is greatly simplified, and the measurement precision is improved.

This utility model relates to the field of tunnel and underground engineering technology, specifically to the field of large-diameter shield tunnel construction, and more specifically to an anti-buoyancy reinforcement system for the shallow overburden starting zone of a shield tunnel. It overcomes the problems of complex construction, high cost, low anti-buoyancy efficiency, or potential damage to the tunnel structure itself in existing technologies. The system includes enlarged-base anti-uplift piles located within the ground reinforcement zone and on both sides of the shield tunnel. Each enlarged-base anti-uplift pile includes a normal diameter section, with an enlarged-base section at the lower end of the normal diameter section. The outer diameter of the enlarged-base section is larger than that of the normal diameter section. Laterally distributed anti-buoyancy pressure plates are connected to the tops of the enlarged-base anti-uplift piles on both sides of the shield tunnel.

The utility model relates to heat conduction liquid filter technical field, concretely is a kind of self-cleaning formula filter element assembly of heat conduction liquid filter, including filter element assembly, fixedly installed in the brush net flow conversion subassembly of filter element assembly;The filter element assembly includes bottom end head and top end head, fixedly installed between built-in filter cover and external filter cover of bottom end head and top end head, and built-in filter cover and external filter cover between fixedly installed annular gap.By fixedly installed built-in filter cover and external filter cover of double-layer filter screen structure, and fixedly install annular brush head in the gap between two filter covers, with liquid along the flow guide pipe and pour into, the float pad under the action of buoyancy will reverse traction multiple cable and annular brush head to move, eventually annular slide head will brush to the net surface adjacent built-in filter cover and external filter cover, to ensure that filter screen is automatically cleaned during each temporary flow.

The invention provides a floater, system and method for oil-water liquid level detection, and belongs to the technical field of liquid level measurement and recognition. The outer side of the floater body is sleeved with the balance weight ring, the floater body is made of the transparent material, and the balance weight ring is made of the metal material, so that the floater body and the balance weight ring are matched to confirm the overall density, and the overall density is stabilized in an oil-water interface interval; therefore, the density of the floater is adjusted, the buoyancy center is changed, and the receiving part of the transmission type photoelectric sensor is shielded. The floater comprises a floater body and a balance weight ring, the floater body is cylindrical and provided with a shaft hole, the top end and the bottom end of the floater body are open, the floater body comprises a first wide-diameter section, a narrow-diameter section and a second wide-diameter section from top to bottom, the lower portion of the narrow-diameter section is provided with a radial inward annular groove, the balance weight ring is annular, and the first wide-diameter section and the second wide-diameter section are connected through the balance weight ring. The inner diameter of the balance weight ring corresponds to the diameter of the groove bottom of the annular groove, and the balance weight ring is arranged in the annular groove in a sleeved mode.

This invention discloses a marine dual-interface observation buoy, comprising a dual-interface temperature measurement mechanism, including an upper probe at the top of the buoy and a lower probe at the bottom; a dual-interface arrival and lifting mechanism for adjusting the buoy's buoyancy and achieving its raising and lowering; and a bottom-contact protection and seabed detachment mechanism for driving the lower probe to vibrate, allowing it to insert into and detach from the seabed. When the upper probe extends above the sea surface, it detects atmospheric temperature, and the lower probe detects seawater temperature; when the lower probe inserts into the seabed, the upper probe detects seawater temperature, and the lower probe detects seabed mud temperature. The buoy possesses dual-interface arrival capabilities at both the seabed-seawater interface and the seawater-atmosphere interface, enabling observation of heat exchange at these interfaces. It allows for soft landing on the seabed, smooth insertion of the lower probe into the seabed for observation, and reduces seabed mud resistance with low energy consumption, achieving rapid ascent.

This invention discloses a modular unit-based system with precisely adjustable center of gravity and center of buoyancy. The system includes at least one modular adjustable center of gravity and center of buoyancy unit. Each unit includes a liquid source pipe, a liquid return pipe, a gas source pipe, a gas return pipe, and an equalization chamber. Each pipe is controlled to open via a one-way solenoid valve. A small liquid level sensor in the equalization chamber monitors the liquid level in real time. By controlling the opening and closing of the one-way solenoid valves, the specific gravity of the gas and liquid in the equalization chamber is adjusted. Simultaneously, the status feedback from the liquid level sensor serves as a closed-loop control mechanism, enabling precise adjustment of the center of gravity and center of buoyancy of the modular unit. Each unit has a modular splicing interface. Multiple units are combined into the main body of the transport platform through corresponding pipe connections and mutual isolation of the equalization chambers, sharing four pipes and achieving distributed control. This invention has a simple and compact structure and can be assembled in different ways according to actual needs. It is suitable for underwater, surface, road, and aerial transport platforms and work scenarios with high requirements for center of gravity or center of buoyancy adjustment, such as underwater vehicles, ships, vehicles, robots, and drones.

A system for and method of utilizing phase-change devices at differing elevations to create lighter-than-air substances at the lower elevation to provide efficiencies in lifting objects to the higher elevation and / or to create heavier-than-air substances at the higher elevation to provide efficiencies when lowering objects to the lower elevation.

The utility model discloses a multi-layer water quality detection sampling device for geothermal water, which relates to the technical field of geothermal water detection and comprises a plurality of fixing cylinders, the fixing cylinders are sequentially connected along the vertical direction, a sampling pipe is arranged in each fixing cylinder, and a first water inlet hole is formed in the outer wall of each fixing cylinder; and the movable cylinder is connected to the exterior of each fixed cylinder in an up-down sliding mode, a floating ring is arranged at the top of the movable cylinder, and multiple layers of second water inlet holes are vertically formed in the outer wall of the movable cylinder at intervals. According to the utility model, the floating ring is subjected to buoyancy to drive the moving cylinder to slide upwards, so that geothermal water at different depths enters the sampling pipes at different depths through the second water inlet hole and the first water inlet hole in sequence, and after collection is completed, the floating ring leaves the water surface, and the moving cylinder descends and resets under the action of self gravity; the second water inlet hole and the first water inlet hole are staggered, so that the fixed cylinder is sealed, and geothermal water at different depths is prevented from entering the sampling pipe in the ascending process of the device.