300 results about "Ballast tank" patented technology

The invention relates to the technical field of aircrafts, in particular to a built-in compressed air and carbon dioxide linkage drainage system and an aircraft. The drainage system comprises a drainage device, a water ballast tank, a first connecting pipeline and a control unit, a first storage cavity for storing liquid carbon dioxide is formed in the first power unit, a second storage cavity for storing high-pressure air is formed in the second power unit, and a pressure reduction cavity is formed in the pressure reduction unit; the first storage chamber and the second storage chamber are both selectively communicated with the pressure reduction chamber; the water ballast tank is provided with a third storage chamber selectively communicated with the pressure reduction chamber; the first connecting pipeline is connected with the second power unit and the pressure reduction unit, and a first on-off valve is arranged on the first connecting pipeline; the first power unit is suitable for converting liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit, and the high-pressure supercritical carbon dioxide enters the third storage chamber after being decompressed by the decompression chamber, so that the first connecting pipeline selectively communicates with the second storage chamber and the decompression chamber.

According to the deep and far seawater suspension oil and liquid storage device and the underwater oil storage method thereof, a layered tank body structure is adopted, and a load adjusting cabin, a flexible oil storage cabin and a water storage cabin are arranged from top to bottom. The load adjusting cabin is used for dynamically adjusting the net buoyancy of the device through seawater feeding / discharging to reduce the load of the mooring system; the oil storage cabin adopts a flexible storage bag to adapt to volume change and is linked with the water storage cabin through a movable composite heat preservation partition plate, the partition plate comprises an active heating layer and a phase change material layer, when the oil temperature is too low, the active heating layer directionally heats crude oil, the phase change layer absorbs dissipated heat, latent heat is released during external low-temperature impact to buffer temperature drop, and dynamic temperature control is achieved. The device is moored and fixed through a gravity anchor, and multiple types of sensors are arranged to monitor the posture, stress, oil temperature and leakage state of the tank body in real time. The problems of oil storage tank deformation, high pour point oil heat preservation and mooring stability under the deepwater high-pressure environment are solved, and the device has the advantages of being low in construction cost, high in environmental adaptability and efficient in operation and maintenance and is suitable for safe storage and transportation of deep and far sea oil and gas resources.

The invention relates to the technical field of underwater vehicles, and discloses a built-in phase change drainage system and an underwater vehicle, the built-in phase change drainage system comprises a drainage device, a water ballast tank and a control unit, the drainage device comprises a first power unit and a pressure reduction unit, a first storage chamber for storing liquid carbon dioxide is arranged in the first power unit, and a pressure reduction chamber is arranged in the pressure reduction unit; the water ballast tank is provided with a containing cabin used for containing water, and the containing cabin is selectively communicated with the pressure reduction cavity. The control unit is in communication connection with the first power unit, the first power unit is suitable for converting liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit, and the carbon dioxide enters the containing cabin after being subjected to pressure reduction of the pressure reduction cavity so as to discharge water in the containing cabin. The drainage system is safe, efficient and high in drainage capacity.

The invention discloses a tension leg type offshore wind power platform and a tendon dynamic balance adjusting method.The wind power platform comprises a center stand column, side buoys, a floating bridge and tendons, a plurality of ballast tanks are arranged in the floating bridge and the side buoys, and a plurality of emergency water inlets are formed in the bottom of the floating bridge and the tops and the bottoms of the side buoys; a ballast tank communicating opening which can be selectively communicated with the buoy ballast tank is formed in the lower part of the floating bridge ballast tank close to the buoy; and a ballast system is arranged in each ballast tank, and the ballast systems can be used for carrying out pressure discharge on the ballast tanks or selectively transferring water in any ballast tank to other ballast tanks. The internal ballast can be selectively adjusted through a natural flowing mode and / or a mechanical mode based on the tendon tension, the tendon failure position and the tendon failure number can be judged, an emergency control strategy is formulated according to the tendon failure condition, the service life of a mooring system is prolonged, and the safety of the mooring system is improved. And the self-storage performance of the tension leg platform can be improved when the mooring system breaks down.

The utility model discloses an anti-corrosion sensor for monitoring corrosion of an in-service FPS0 ballast tank, which comprises a sensor shell, a waterproof cable extending into an inner cavity is arranged on the sensor shell, a silver chloride electrode is arranged at the bottom of the sensor shell, one end of the silver chloride electrode extends into the inner cavity and is electrically connected with the waterproof cable in the inner cavity, and the other end of the silver chloride electrode extends downwards. A flange plate used for sealing the inner cavity is arranged at the top end of the sensor shell, a connecting hole allowing the waterproof cable to extend out is formed in the flange plate, a first connecting part used for sealing and fixing the waterproof cable is arranged on the flange plate, and a second connecting part used for sealing and fixing the silver chloride electrode is arranged at the bottom end of the sensor shell. And the surface of the sensor shell is provided with a fixed connecting device for quickly installing the sensor shell and a rib plate on the inner wall of the ballast tank. Installation can be achieved in the offshore FPSO operation period, damage to a ship body is avoided, thermal treatment is not needed, and rapid installation and replacement can be achieved.

The invention discloses a tension leg floating type wind power platform control system which comprises a central control mechanism, an environment monitoring mechanism, a ballast monitoring mechanism and a ballast control mechanism. The central control mechanism comprises an acquisition assembly and a data service assembly, and the acquisition assembly is in communication connection with the data service assembly; the environment monitoring mechanism is used for monitoring the marine environment and the motion state of the platform; the ballast control mechanism comprises a load discharge pump, a ballast tank, an electro-hydraulic valve and a lower floating body; the electro-hydraulic valve is arranged between the load discharge pump and the ballast tank; the ballast monitoring mechanism is used for monitoring the pressure of a load discharging pump, the liquid level of a ballast tank and the sea discharging flow; wherein the environment monitoring mechanism and the ballast monitoring mechanism are in communication connection with the collection assembly, the electro-hydraulic valve is in communication connection with the data service assembly, and the tension leg floating type wind power platform control system solves the problem that an existing tension leg floating type wind power platform is poor in safety in the installation and use process.

The utility model discloses a dispersed ballast tank structure of a culture net cage. The dispersed ballast tank structure comprises a ballast tank base platform and a net cage assembly, the ballast tank base station comprises a base station frame and a plurality of transverse trusses; the base platform frame comprises two first transverse trusses, a plurality of first longitudinal trusses, a plurality of first ballast tanks and a plurality of second ballast tanks. The base platform frame is composed of the first ballast tanks, the second ballast tanks, the transverse trusses, the first transverse trusses and the first longitudinal trusses, so that the stability of the dispersed ballast tank structure of the aquaculture net cage is improved, the four corners of the second ballast tanks form a positioning result, the good wind wave resistance is achieved, and the external force resistance is improved; according to the dispersed ballast tank structure of the aquaculture net cage, the floating state load adjusting mode of the aquaculture net cage is improved, the structure is more convenient to construct, the overall weight is reduced, the construction and operation cost is reduced, and offshore safe and efficient operation and maintenance of the aquaculture net cage are more convenient.

The present invention relates to the technical field of ballast tanks, and discloses an adjustable ballast tank, a medium mixing method thereof, and a floating offshore platform. The adjustable ballast tank includes: a plurality of medium capsules, which are nested in sequence or arranged closely together, each medium capsule having an independent medium cavity, each medium cavity being capable of storing a medium, and each medium cavity being connected to the outside world through a channel opening on the medium capsule for filling or discharging the medium. The present invention can store a variety of media by providing a plurality of medium cavities, so that the floating offshore platform can mix and use media when operating at sea, making it more convenient to obtain the media and having better economic benefits.

Disclosed is a flow-guide device for an offshore platform, comprising a flow-guide column base, a ballast level control device and a spiral side belt system, wherein the flow-guide column base is located at the bottom of an offshore platform, and multiple flow-guide column bases are arranged symmetrically and distributed in a ring array; the flow-guide column base is rotatably connected to the offshore platform; a ballast compartment is arranged in the flow-guide column base, and the ballast level control device is used for controlling a ballast level in the ballast compartment; and the spiral side belt system is arranged outside the flow-guide column base and used for restraining vortex-induced resonance. The flow-guide column base and the offshore platform can be kept in a relatively fixed state by means of a clamping device, such that the offshore platform is able to rotate synchronously with the flow-guide column base.

The present invention discloses a polyaspartic acid ester-modified epoxy resin, a non-toxic, environmentally friendly, wear-resistant, and anti-corrosion coating for ships containing the resin, as well as a preparation method and application. The structural formula of the polyaspartic acid ester-modified epoxy resin is as follows: The solvent-free, non-toxic, and anti-corrosion and anti-corrosion coating of the present invention uses the polyaspartic acid ester-modified epoxy resin as a film-forming material, can be cured at room temperature, and exhibits excellent adhesion, salt spray resistance, and media resistance. When applied to ship ballast tanks, drinking water tanks, oil and sewage tanks, and other compartments, or other metal substrate surfaces for corrosion protection, it provides excellent long-term anti-corrosion performance.

The invention relates to the technical field of corrosion prevention of marine equipment, in particular to a sacrificial anode for a dry-wet alternating and high-temperature environment and a preparation method and application of the sacrificial anode. According to the sacrificial anode, the composite material composed of the carbon nanotubes and the metal elements is added into the aluminum-based alloy, the microstructure of the aluminum alloy is improved due to the addition of the carbon nanotubes, the thermal stability of the anode is improved, surface activation of the anode is promoted, the phenomenon that the surface of the anode is crusting and even passivated due to the influence of high temperature and a dry-wet alternating environment is prevented, and the service life of the anode is prolonged. Meanwhile, good conductivity is maintained; and by optimizing the ratio of the carbon nanotubes to the metal elements, the anti-corrosion protection efficiency on a metal structure in a high-temperature and dry-wet alternating environment is enhanced. Therefore, the method is expected to be applied to ocean environments such as ocean crude oil ship ballast tanks, FPSO (Floating Production Storage and Offloading) ballast tanks and mobile oil production platforms. The preparation method provided by the invention is simple and convenient, has a good industrial application prospect, and can improve the production efficiency and reduce the environmental pollution.

A floatable foundation (100) for a wind turbine generator and / or electrical equipment (61), the foundation (100) comprising: a central column structure (10,11,12); at least three outer column members (20,21,22) disposed about the central column structure (10,11,12); at least three horizontally extending lower connection members, such as pontoon members (30,31,32), each horizontally extending lower connection member fixed to and extending between the central column structure (10,11,12) and a respective one of the at least three outer column members (20,21,22); and three horizontally extending upper connection members, such as beam members (40,41,42), each horizontally extending upper connection member fixed to and extending between the central column structure (10,11,12) and a respective one of the at least three outer column members (20,21,22), wherein each column member (20,21,22) comprises a ballast tank (81) configured for holding water ballast and the ballast tank (81) vertically spans a design waterline (91) of the respective column member (20,21,22).

The invention belongs to the technical field of liquid carbon dioxide transport ships, and particularly relates to a novel liquid carbon dioxide transport ship adopting a fiber composite liquid cargo tank. The ship comprises a main ship body. The main ship body comprises a tail module, a cabin module, a cargo compartment module and a head module. A plurality of independent cargo compartment chambers are arranged in the cargo compartment module, and the adjacent cargo compartment chambers are separated through transverse compartment walls; an independent carbon dioxide liquid cargo tank, a top ballast tank and a bottom ballast tank are arranged in each independent cargo compartment; the carbon dioxide liquid cargo tank is made of a fiber composite material or a combination of steel and the fiber composite material and comprises an inner container and a winding layer, and the cross section of the carbon dioxide liquid cargo tank is of a bilateral symmetry polygonal structure. The carbon dioxide liquid cargo tank is connected with the hull structure through supporting blocks. The liquid carbon dioxide transport ship is high in cargo hold area capacity utilization rate, high in stability and reliability and low in capacity requirement for hoisting facilities in the construction process.

The invention relates to a liftable energy self-sufficient ocean communication buoy system which comprises a buoy body. The wave energy power generation device is installed in the buoy body and used for converting wave mechanical energy into electric energy when the buoy body moves up and down along with waves; the energy storage device is electrically connected to the wave energy power generation device; the lifting system comprises a ballast tank and a mechanical lifting device; wherein the ballast tank is arranged in the buoy main body and is used for adjusting the buoyancy by adjusting the water quantity in the tank; the mechanical lifting device is fixed to an external anchoring foundation, connected to the buoy body and used for driving the buoy body to do lifting motion in water. The communication device is used for carrying out data communication in a water surface state or an underwater hidden state; and the control device is used for controlling lifting of the buoy main body and switching of communication modes of the communication device according to environmental parameters or remote instructions, and has the advantages of being high in severe sea condition resistance, high in concealment and scene adaptability, self-sufficient and stable in energy, low in operation and maintenance cost and reliable in communication function.

The disclosed relates to systems and methods for generating wave energy incorporated into the floating production, storage and offloading units, which comprises: one or more energy extraction chambers arranged on sides of a floating production, storage and offloading unit; each energy extraction chamber having a lower opening being obtained from removal of a bottom plate of the chamber to provide fluid communication between the interior of the chamber and the seawater; an upper opening made at the top of the chamber for passage of air flow; and an energy generation assembly for converting air flow from the opening into electrical energy; wherein each air chamber is obtained by widening a ballast tank in the direction opposite to the center of the unit to create a resonance condition in the chamber so that a final chamber widening width is determined based on a resonance period of interest of the chamber.

The invention provides an internal sensor watertight protection device for changing a void tank into a ballast tank, and particularly relates to the technical field of ship transformation. The protection device comprises a waterproof cabin and a probe sleeve. An equipment mounting port and an equipment access port are respectively formed in two ends of the waterproof cabin; a wire inlet interface is formed in one side, close to the equipment access hole, of the side wall of the waterproof cabin; the equipment mounting port is connected with the first blind plate flange through the first connecting flange; the equipment access hole is connected with the second blind plate flange through the second connecting flange; a through hole is formed in the center of the first blind flange; the probe sleeve penetrates through the through hole, one end of the probe sleeve extends into the inner cavity of the waterproof cabin, and the other end of the probe sleeve is fixed with an installation screw seat of an original sensor of a ship bulkhead. The device is simple in structure and good in air tightness, watertight protection can be carried out on an original sensor when a void tank is changed into a ballast tank, no new mounting hole needs to be additionally arranged, hot work does not need to be carried out, and bin cleaning and explosion measurement work is avoided.

The utility model relates to a kind of assembled cutter suction dredger side pontoons with sealing transition structure.The side pontoons are sequentially connected by head section side pontoon monomer, middle side pontoon monomer and tail section side pontoon monomer.The head section side pontoon monomer includes head ballast tank, first main buoyancy empty cabin and deck, and first sealing transition empty cabin is arranged at the end thereof.The middle side pontoon monomer includes second main buoyancy empty cabin, storage cabin and deck, and second sealing transition empty cabin with the same width as the first sealing transition empty cabin is arranged at the end of the storage cabin, and the two are sealingly connected by fastener, and third sealing transition empty cabin is arranged at the side of the middle side pontoon monomer adjacent to the main pontoon.The tail section side pontoon monomer includes generator cabin, fuel cabin, tail ballast tank and deck, and fourth sealing transition empty cabin is arranged at the side of the tail section side pontoon monomer adjacent to the middle side pontoon monomer, and fifth sealing transition empty cabin is arranged at the side of the generator cabin adjacent to the main pontoon.The design realizes efficient, stable and safe operation of side pontoons through modular assembly and sealing transition structure optimization.

The present invention provides a bottom-supported platform, which is installed at sea and includes a workbench, a support structure, a ballast tank, and a compartment dividing structure. The support structure includes a plurality of columns spaced apart along the periphery of the workbench, a plurality of low cross braces respectively arranged between two adjacent columns, and a plurality of sediment tanks fixed to the lower ends of the columns. The columns extend in the vertical direction. The ballast tanks include a column tank arranged in the columns, a sediment tank arranged in the sediment tank, and a low cross brace tank arranged in the low cross brace. The column tanks are connected to adjacent sediment tanks and adjacent low cross brace tanks. The compartment dividing structure includes a first partition wall and a second partition wall. The first partition wall is arranged at the bottom end of the sediment tank to separate the sediment tanks. The second partition wall is located between the column tank and an adjacent low cross brace tank to separate the column tank and the adjacent low cross brace tank, and a gap is formed between the second partition wall and the top of the low cross brace tank. The structure of the bottom-supported platform is simplified and the stability of the bottom-supported platform is improved.

The invention discloses a cargo hold side bottom ballast tank vent pipe protection cover which comprises a pipe protection cover body, the pipe protection cover body is composed of a plurality of single protection cover assemblies, and each single protection cover assembly comprises an angle steel frame assembly, a first square steel assembly, a second square steel assembly and a third square steel assembly. The angle steel frame assembly is fixedly connected with the first square steel assembly, the second square steel assembly and the third square steel assembly in a welded mode, and every two adjacent single protection cover assemblies are fixedly connected through a first locking screw and a second locking screw. According to the technical scheme, the pipe protection cover body is mainly formed by welding multiple sets of angle steel and multiple sets of square steel, conventional steel pipe welding and fixing are replaced, manufacturing is easy and convenient, multiple sets of single protection cover assemblies can be prefabricated, the field installation efficiency of the pipe protection cover body is improved, and the shape of the pipe protection cover body is convenient to adjust; the angle steel is manufactured by rotating 45 degrees, bulk cargoes in the cabin are prevented from being accumulated on the angle steel face, and the cargo accumulation prevention effect is achieved.

The invention relates to the technical field of ocean engineering equipment, and discloses an intelligent adjusting ballast righting system which comprises a ballast tank used for adjusting the transverse direction and the longitudinal direction of a platform, a cabin liquid level sensor and a platform draught sensor, the cabin liquid level sensor and the platform draught sensor are arranged in the ballast tank, and the platform draught sensor is electrically connected with an intelligent load adjusting control module. The platform draught sensor is electrically connected with the draught filtering device, the draught filtering device is electrically connected with the intelligent load adjusting control module through the transverse and longitudinal inclination automatic solving device, the transverse and longitudinal inclination automatic solving device transmits transverse and longitudinal inclination angles and average draught to the intelligent load adjusting control module, and the intelligent load adjusting control module controls the ballast pump to be electrically connected with the ballast tank. The floating type draught fan can automatically and accurately adjust the water volume of each ballast tank in the working state, the platform is righting in time, the power generation efficiency of the floating type draught fan is improved, meanwhile, the liquid level of the ballast tanks can be optimized through an intelligent algorithm under the condition of severe sea conditions, and the anti-overturning capacity of the platform is enhanced.

The present invention provides a drainage pipeline for a ballast tank and a ballast tank. The drainage pipeline of the ballast tank includes: a ballast water pipe, which is communicated with the ballast tank; a tank cleaning water pipe, which is communicated with the ballast tank and is spaced apart from the ballast water pipe, and the diameter of the ballast water pipe is larger than that of the tank cleaning water pipe; a ballast and tank cleaning main pipe, which communicates the ballast water pipe and the tank cleaning water pipe; a ballast pump, which is communicated with the ballast and tank cleaning main pipe to discharge the water in the ballast tank through the ballast and tank cleaning main pipe, the ballast water pipe and the tank cleaning water pipe. The drainage pipeline of the ballast tank of the present invention can reduce the number of arranged drainage pipelines, reduce the weight of the ship, and improve the drainage efficiency.

The invention relates to a dynamic buoyancy adjustment balance control method for a deep sea suspension type data center, and belongs to the technical field of deep sea data center control. Aiming at the problems of low speed, low precision and insufficient reliability of a traditional buoyancy adjusting method, a high-pressure air source is adopted to drive an inflatable airbag and a water ballast tank to carry out cooperative adjustment, an inertial measurement unit is combined to monitor attitude data in real time and feed-forward control of an ocean current prediction model, and a distributed buoyancy unit redundancy design and a gas-liquid two-phase adjusting mechanism are adopted to adjust the buoyancy of the ocean current prediction model. And dynamic balance control in a deep sea environment is realized. According to the method, the buoyancy response speed and control precision are remarkably improved, the system energy consumption is reduced, the environmental adaptability is enhanced, and stable suspension and safe operation of the data center in complex ocean currents are ensured through multiple safety protection mechanisms.

The invention discloses a folding type tension leg floating platform which comprises a central tower column, an umbrella-shaped floating body and a locking component, and the umbrella-shaped floating body and the locking component are arranged on the central tower column; a central ballast tank is arranged on the central tower column, and a bearing part is arranged above the central ballast tank; the umbrella-shaped floating body comprises a plurality of buoys and sliding pieces, one ends of the buoys are movably connected with the central tower column through the sliding pieces, the buoys can be unfolded or folded relative to the central tower column, when the buoys are unfolded, the other ends of the buoys are connected with the tension tendons, and the buoys are supported on the bearing parts; the locking component is arranged above the buoy, and in the locking state, the locking component can abut against the buoy in the unfolded state to the bearing part. According to the invention, not only is the transportation convenience of the tension leg platform, especially the tension leg platform with a cantilever type buoy improved, but also the problem of structural stress overrun at a connecting node when a floating body structure is in a working state can be effectively avoided.

The invention discloses a tension leg floating type draught fan installation method and device. The method comprises the steps that a mooring anchor is installed to the preset depth of a seabed; the tension leg floating type draught fan is towed to the center position where the mooring anchor is located; the tugs enter the parking lot to reach the parking space; a deck winch on the tug is connected with an anchor chain, the floating body is connected with an anchor cable, the anchor cable penetrates through a transition ring on the mooring anchor, and the anchor chain passes through a chain stopper and is connected with the anchor cable; the tug drags the anchor chain back on to the floating body, and synchronously cooperates with ballast water to a ballast tank of the floating body to level the levelness of the floating body; when the floating body reaches the preset draft depth, dragging is stopped, and the anchor chain is fixed by the chain stopper; a floating body inclination sensor measures whether the inclination degree of the platform meets the requirement or not, if the design requirement is met, a floating body ballast tank drains water, and tension in an anchor chain and an anchor cable is monitored to reach a preset value through a tension sensor; and installation is completed, and the tug is removed. The installation of the tension leg floating type fan can be rapidly completed, the installation is convenient and fast, the cost is low, and batch installation of the tension leg floating type fan can be rapidly carried out.

The utility model relates to a sounding hammer with a water sample collection function. The sounding hammer comprises a sounding hammer body and a graduated scale, the body of the sounding hammer is divided into an upper part and a lower part, the lower part is a hammer body, the upper part is of a cavity structure for collecting and storing ballast water, the side wall of the connecting part of the cavity structure and the hammer body is of a hollow structure, and a water inlet hole is formed in the hollow part; the inner wall, located above the water inlet hole, of the cavity structure is rotationally connected with a movable water inlet piece. Vent holes are formed in the upper part of the cavity structure; and the graduated scale is fixedly connected with the top of the body of the sounding hammer. According to the utility model, the water sample collection operation process is simple, and the tedious process of water sample collection through a ballast tank manhole in the past is avoided; the sounding hammer also has a water sample collection function; the structure is simple and practical, and manufacturing and purchasing cost is low.

The invention discloses a ship ballast water adjusting method based on an improved tornado optimization algorithm, and the method comprises the steps: S1, obtaining ship ballast tank information and a current ballast water state, and constructing a target function according to the ship ballast tank information and the current ballast water state; s2, constructing a ballast water constraint condition according to the target function; s3, designing an improved tornado optimization algorithm and solving the target function in combination with constraint conditions of ballast water to obtain an optimal solution as a current ballast water adjustment scheme; and S4, adjusting the ballast water according to the ballast water adjusting scheme. Through the improved tornado optimization algorithm, the calculation efficiency and optimization precision of ballast water adjustment are remarkably improved, and the ship navigation safety and economy are effectively guaranteed.

The present invention relates to a floating intervention vessel, an associated intervention assembly, and a facility intended for temporarily mooring itself on an offshore wind turbine platform. The vessel comprises a float (80) and a wind turbine intervention assembly carried by the float (80). The float (80) comprises a buoyant body (86) and a fastening base plate (88) protruding from the buoyant body (86) along a fastening axis (A-A') on the underside of the offshore wind turbine platform. The buoyant body (86) defines a ballast receiving volume. The vessel comprises a ballast controller configured to control the amount of ballast received in the ballast receiving volume to raise an upper contact surface (94) of the base plate (88) and place the upper contact surface (94) in contact with the underside of the offshore wind turbine platform. The float (80) is monohulled.

The application relates to the technical field of aquaculture net cages, and discloses a multi-working-condition self-adaptive integrated semi-submersible truss net cage which comprises a net cage and a net cover. The net cover is arranged outside the net cage, and the bottom of the net cage is symmetrically provided with ballast tanks. The combined cooperation of a scraping ring, a first motor, a first pull rope, a second pull rope, a reset assembly, a capturing assembly and a second motor can clean the impurities attached to the inner walls of the ballast tanks, can avoid the impurities from being accumulated on the inner walls of the horizontal tanks and the vertical tanks, can avoid the situation that the volume of the horizontal tanks and the vertical tanks is reduced due to long-term accumulation of the impurities, can affect the use, can capture the impurities during cleaning, can prevent the impurities from moving to the inner wall on the side of the horizontal tanks or the vertical tanks which is in contact with the scraping ring during resetting, can ensure that the resetting of the scraping ring is not affected by the impurities, can ensure that the scraping ring can be reset smoothly, can shake off the captured impurities from the ring net through beating the ring net, and can make the impurities be discharged from the ballast tanks more fully.

A wave-activated buoyancy regulator for structures positioned in a body of water, wherein a wave-activated pump is used to provide neutral, negative and positive buoyancy in response to prevailing ambient wave conditions, through the variation of the ratio of a first fluid to a second fluid within a ballast tank.

The present invention relates to a side-stream type ballast water treatment apparatus for collecting some seawater flowing through a main pipe between a sea chest and a ballast tank, electrolyzing same, and then injecting the treated seawater into the main pipe, the apparatus comprising: a side pipe which branches off from the main pipe so as to collect some of the seawater flowing through the main pipe, and which supplies the collected seawater back to the main pipe; and an electrolytic bath, which electrolyzes the seawater flowing into the side pipe so as to produce an oxidizing agent, wherein the side pipe includes: a bypass pipe for connecting the main pipe and an inlet side of the electrolytic bath; and an electrolytic bath pipe connected to the bypass pipe and embedded in the electrolytic bath, the electrolytic bath pipe passing through the main pipe.