225 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 discloses a split type suction pile anchoring foundation and an offshore construction method, and relates to the technical field of ocean engineering, and the split type suction pile anchoring foundation comprises a suction pile structure and a buoyancy tank structure; an apron board structure and a lug plate structure are arranged on the side wall of the suction pile structure; a drainage pipeline penetrates through the top of the suction pile structure and communicates with the interior of the suction pile structure and the water suction pump. A balance weight cabin and a ballast tank are arranged in the buoyancy tank structure, and a pressure discharging and loading system is arranged in the ballast tank; the supporting leg structures are arranged at the bottom of the buoyancy tank structure, and the buoyancy tank structure is pressed on the apron board structure through the supporting leg structures; a first eye plate connected with a mooring rope or a mooring chain is arranged on the outer side wall of the buoyancy tank structure. The technical problems that due to the fact that a traditional suction pile anchoring foundation is limited by the dead weight, the depth of penetrating into soil in the soil conditions such as sandy soil is insufficient, enough pressure difference cannot be generated in the closed space formed by the cylinder wall and soil in the space outside the cylinder wall, and the suction barrel reaches the preset installation depth and the designed tensile strength and the designed pulling strength are solved.

The utility model discloses a sunken hydrological instrument, and belongs to the technical field of hydrological survey. The device mainly comprises a detection box, a hydrological sensor group, a connecting pipe and a lifting assembly, the lifting assembly is used for driving the detection box to descend and ascend in water, and a base is arranged at the lower end of the connecting pipe. According to the sinking type hydrological instrument, the whole equipment can sink into the water bottom under the gravity of the balancing weight, the water bottom area is detected through the detection box and the hydrological sensor set, then hydrogen peroxide makes contact with manganese dioxide to rapidly generate oxygen, air is injected into the air bag through the air injection pipe, the air bag expands to generate upward buoyancy, and the water bottom area is detected. And hydrological data acquisition is carried out on water areas with different depths in the ascending process, so that the effect of detecting the water areas with deeper levels is achieved.

The buoyancy control device for scuba diving comprises an air bladder, a harness comprising at least two shoulder straps and an abdominal strap made up of two abdominal half-straps, a backrest provided with first slots engaged by the abdominal half-straps, second slots engaged by at least one retaining strap for retaining at least one air cylinder, one or more third slots engaged by the two shoulder straps, and one or more fourth slots engaged by corresponding straps for connecting the backrest to the air bladder.

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.

A fluid-floated conveying device includes a multi-channel space conversion cabin. An upper channel port is provided with a floating ball outlet gate which is communicated with a water pipe filled with a liquid. A side channel port is provided with a floating ball inlet gate communicated with the external atmosphere. A lower channel port is connected to a water storage pressure cylinder or a water discharging pipe. A floating ball carries articles and enters the cleared space conversion cabin from the side channel. The floating ball inlet gate of the side channel is closed, the cabin is filled with water, the floating ball outlet gate of the upper channel is opened, the floating ball rises and enters from the upper channel port, the communicated water pipe filled with the liquid, the water buoyancy enables the floating ball to rise, and the carried articles are conveyed to a receiving platform.

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 belongs to the technical field of overwater construction platforms, and particularly relates to an overwater operation platform and a construction method thereof. The two buoyancy tank units are spliced together in the length direction to form a working platform main body; the end parts of the two buoyancy tank units are locked and fixed through a splicing locking mechanism; the buoyancy tank unit adopts a hollow steel buoyancy tank, and a buoyancy tank water inlet / outlet is formed in the middle of the upper end of the buoyancy tank unit; the water pumping and draining device is mounted at the water inlet / outlet of the buoyancy tank and is used for injecting water into the buoyancy tank unit or pumping and draining water stored in the buoyancy tank unit to the outside of the buoyancy tank unit; the positioning pile is vertically and movably inserted in the middle of the tail end of the buoyancy tank unit; wherein the upper end of the positioning pile extends to the upper part of the upper end of the buoyancy tank unit, and the lower end of the positioning pile penetrates through the buoyancy tank unit and then extends and is fixed at the water bottom; the device is simple in structure, the height of the working platform body can be adjusted only by adjusting the water amount in the buoyancy tank units, the operation process is simple, and the device has the advantages of being safe and reliable.

The invention relates to a forward prediction method for bubble pulsating pressure wavelets in a shallow water area, belongs to the field of deep sea resource exploration and ship structure protection, and aims to solve the problem of forward prediction of bubble pulsating pressure in the shallow water area in existing engineering. The method comprises the steps of inputting bubble initial conditions, environmental parameters and pressure measuring point positions, judging the influence of a water area boundary, designing a correction term expression, substituting into an equation to carry out time advance, calculating and considering physical quantity propagation time, and finally outputting a pressure curve based on a Bernoulli equation. On the basis of the Kelvin impulse theory, buoyancy parameter deviation induced by non-spherical deformation of the bubbles is corrected, the Kelvin impulse theory solution of the large-scale bubbles under the influence of different water area boundaries is calculated through the mirror image bubble method, and the purpose of rapidly predicting the jet flow direction of the underwater large-scale bubbles is achieved. And a theoretical basis and a basic technical support are provided for engineering construction.

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 cooling systems, and provides a passive cooling system which comprises a heat exchange device, a first pipeline and a separation box, the heat exchange device is used for carrying out heat exchange with seawater, the heat exchange device is connected with the separation box, and the heated seawater enters the separation box; the first pipeline is connected with the separation box, and the first pipeline is used for discharging the heated seawater; a partition plate is arranged in the separation box and used for preventing steam bubbles from flowing along the first pipeline. According to the passive cooling system, by arranging the partition plate in the separation box, a steam-water mixture can be separated by utilizing buoyancy force and the partition plate, so that steam is gathered at the top of the separation box, and liquid is gathered at the bottom of the separation box, so that the liquid is discharged from the first pipeline, and the steam in the first pipeline is prevented from being directly contacted with backflow supercooled seawater to cause condensation; and a water hammer is further induced.

The utility model discloses a buoyancy lift type adjustable positioning tool for a thermal forming die. The buoyancy lift type adjustable positioning tool comprises a positioning tool body, an upper nitrogen spring and a lower nitrogen spring. The upper nitrogen spring is arranged in the upper die, the lower nitrogen spring is arranged in the lower die, the upper nitrogen spring and the lower nitrogen spring are oppositely arranged, and the positioning tool body is fixedly connected to the end of the lower nitrogen spring. During mold closing, the upper nitrogen spring and the lower nitrogen spring abut against each other to drive the material sheet to descend to a forming working face along with the positioning tool body. And during mold opening, the upper and lower nitrogen springs are reset, and the positioning tool body returns to the initial position. The positioning tool adapts to thermal forming parts with different heights through adjustment of the upper nitrogen spring and the lower nitrogen spring, the strength of the positioning tool is enhanced, the risks of positioning tool breakage and die damage are reduced, and the positioning precision and the thermal forming quality are improved.

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 relates to the technical field of dredging, in particular to a Yellow River dredging and desilting platform which comprises a buoyancy tank. The mud box is hung below the floating box through the sling mechanism, the blasting and flushing air pipe is vertically installed in a cavity of the mud box, a one-way pressure limiting valve is installed in an air outlet of the blasting and flushing air pipe, the upper portion of the blasting and flushing air pipe is sleeved with the first electromagnetic coil, and the lower portion of the blasting and flushing air pipe is sleeved with the second electromagnetic coil; the upper end of the air inlet pipe extends out of the water surface, the lower end of the air inlet pipe is connected with the interior of the blasting air pipe, a one-way valve is installed in the lower end of the air inlet pipe, and the sand discharging mechanism is installed on the mud box and used for discharging sand in a cavity of the mud box. The explosion flushing air pipe inserted into the silt exhausts and crushes the silt, concentrates the silt and then discharges the silt, the silt discharging efficiency is improved, and the practicability is good.

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.

The invention discloses a method for determining and correcting the weight and buoyancy center position of a variable cross-section immersed tube joint, which aims at a special variable cross-section immersed tube joint structure, can standardly calculate the weight and buoyancy center position of the variable cross-section immersed tube joint, and further reasonably determines the fixed inclination height of the tube joint and controls the stability of the tube joint under various working conditions by determining the weight and buoyancy center position. And the safety and the stability of floating transportation in water saving of the variable-cross-section immersed tube are ensured. According to the method, the stress and deviation correction problems of the variable cross-section immersed tube joint in the floating and floating transportation processes are solved, the design difficulty is effectively reduced, and the construction control risk is reduced.

The invention discloses a crude oil gas content detection device and method matched with a standard volume tube for use, a buoyancy lift type liquid pressing plate is arranged in an inner cavity of a detection tube and covers the surface of crude oil in the detection tube, and a gas inlet is formed in the top of the detection tube and is communicated with a pressure control assembly; the pressure control assembly is used for supplying gas into the detection pipe, so that the pressure borne by the crude oil below the buoyancy lift type liquid pressing plate is the same as the pressure of the crude oil in the pipeline; a liquid inlet is formed in the bottom of the detection pipe and can be communicated with an outlet of the standard volume pipe through a pipeline; a temperature sensor is arranged on the detection tube; the liquid level meter is used for detecting the liquid level of crude oil in the detection pipe, and the bubble detection unit is arranged on the detection pipe and used for detecting whether the crude oil in the detection pipe contains micro-scale bubbles or not. The method can be used for detecting whether the crude oil real liquid contains the micro-scale bubbles or not, provides a basis for correcting the verification result of the standard volume pipe on the crude oil flowmeter, and breaks through the limitation of an existing gas content detection method.