76results about How to "Enough buoyancy" patented technology

An automobile hub system with a floating air bag is an automobile hub floating system for preventing an automobile from sinking. An automobile sinking-preventing safety air bag device is arranged inside a hub in advance. The air bag device is composed of the floating air bag, a tyre pressure sensing system, an automatic inflating valve, an independent air supplementing device, an inflating control air valve, an automatic sinking sensing switch, a manual opening switch and the like. When the automobile sinks, the automatic sinking sensing switch charges the air in tyres into the floating air bag automatically, the inflated floating air bag breaks the independent hole air bag switch on the hub, the automobile supports the bounced floating air bag, and the air bag is floated on water. An independent air supplementing device port is connected with the independent air supplementing device. When the tyre pressure sensing system senses that floating force is insufficient to float the automobile, the independent air supplementing device works and charges the air into the air bag. The system has high economical value and is remarkable in effect.

Provided is an emergency load rejection mechanism of a deep-sea manned submersible. The emergency load rejection mechanism of the deep-sea manned submersible comprises a rotary shaft, wherein the rotary shaft penetrates through a pressure-resistant spherical shell cabin, a hand lever is inserted into the upper end of the rotary shaft, the middle of the rotary shaft is installed in a shaft sleeve through a shaft sealing device, the shaft sleeve is arranged under the pressure-resistant spherical shell cabin, a ballast hanging protruding claw wheel is installed at the lower end of the rotary shaft, the ballast hanging protruding claw wheel is inserted into a hole in the top surface of a ballast block, and hanging is achieved; two guiding slide ways are formed in each of the four vertical planes of the ballast block so that the ballast block can be smoothly rejected under the conditions of different inclined postures of the deep-sea manned submersible. According to the emergency load rejection mechanism of the deep-sea manned submersible, an operator directly rotates the T-shaped hand lever to reject the emergency ballast block so that the deep-sea manned submersible can obtain enough buoyancy to upwards float to the water surface in emergency, the problem that when a control system has a failure, a submersible cannot reject ballast block to upwards float is solved, and it is ensured that the manned submersible can return safely.

The invention discloses an open trench tunnel main structure tall side wall unilateral vertical mold and a construction process thereof. The open trench tunnel main structure tall side wall unilateral vertical mold comprises a right triangle-shaped profile steel triangular truss; an embedded foundation bolt is inclined at one side of the bottom of the profile steel triangular truss; multiple pressing beam channel steels are arranged on the profile steel triangular truss; a template is mounted at the outer side of the long edge of the right-angled edge of the profile steel triangular truss; multiple connecting devices are arranged between the profile steel triangular truss and the template; one ends of the connecting devices are positioned in the template at one side of the profile steel triangular truss; a transverse connecting steel pipe is mounted on the inclined edge of the profile steel triangular truss in the length direction; and an operation platform is mounted at the upper part of the profile steel triangular truss. The profile steel triangular truss and an embedded part are used as support systems of the template; the unilateral mold standing can be performed; a bracket is high in stability and excellent in water resistance; the steel pipe use level is low; the disassembly is convenient; enough sidesway and buoyancy resistance can be provided to the tunnel tall side wall template; the template construction precision is improved; and the construction efficiency and the engineering progress are greatly improved.

The invention relates to a high-pressure air supply valve with a pressure difference control function and an air scavenging method. According to the method, the pressure difference between a water ballast space and outside seawater can be kept stable during air scavenging. The high-pressure air supply valve is composed of a main valve body, an auxiliary valve body and a control valve body, wherein the main valve body is the main channel for high-pressure air supply, high-pressure air enters the water ballast space through the main valve body, the opening degree of a valve element of the main valve body is automatically adjusted through the pressure difference between an upper cavity of the valve element and a lower cavity of the valve element, and then the adjustment of supplied airflow is achieved; the auxiliary valve body is used for controlling the opening and closing of the main valve body and has both a pneumatic control function and a manual control function; the control valve body is used for sensing the pressure difference between the interior of the water ballast space and the exterior of the water ballast space, controlling the opening degree of the valve element of the main valve body, and controlling the opening degree of a valve element of the control valve body according to the pressure difference to enable the flow of compressed air in the upper cavity of the valve element of the main valve body to be changed, then the change of pressure of the upper cavity of the valve element of the main valve body is caused, and finally the opening position of the valve element of the main valve body is controlled. According to the high-pressure air supply valve, a fully-mechanical structure is adopted, no electrical element is used, remote operation can be achieved through compressed air, other power sources are not needed, and reliability is high.

The invention discloses a belt type rescue device which comprises a buckle head and an elastic belt. The belt type rescue device is simple in structure and convenient to carry, can be tied on the waist by being arranged in a belt form, and does not affect using of hands after being started. The belt is internally provided with a plurality of airbags, the buoyancy is sufficient, hands can conveniently grab objects for lifesaving, and a user cannot feel tired after using the device for a long time. A detection sensor is arranged and can automatically monitor the heart rate when a swimmer has a sudden heart attack, or faints by collision or has other diseases and situations, especially when a person (child) is liable to be panic in drowning, then a controller is used for automatically opening the airbags, the survival rate is increased, and the using range is expanded.

The invention discloses underwater salvage equipment combined with an unmanned ship for operation and a working method thereof. The underwater salvage equipment comprises the unmanned ship and a salvage equipment body; the unmanned ship comprises a first control mechanism; the salvage equipment body comprises a shell and a spiral propulsion mechanism; the shell comprises a second control mechanism, a salvage part and a storage part; and the second control mechanism comprises a second processor, a second driving device, a second navigation device and a second positioning device. The second processor is connected with the second driving device, the second navigation device and the second positioning device; the second navigation device generates the traveling route of the salvage equipment body; the salvage part comprises a mechanical arm; the storage part comprises floating devices comprising balloons, safety airbags, lock catches and lock rings; the lock catches are arranged on the balloons and the safety airbags; the lock rings are arranged at the other ends of the safety airbags; the safety airbags are connected in an end-to-end mode through the lock catches and the lock rings; and the spiral propulsion mechanism is arranged at the tail end of the shell to control the underwater heading of the salvage equipment body.

The invention relates to a wind wave resistant ecological floating island. The ecological floating island comprises a floating island body, wherein the floating island body comprises a main floating body, a first planting medium layer and a first plant layer planted on the first planting medium layer; the main floating body comprises an upper floating body above the water surface and a cofferdam floating body below the water surface; the upper floating body is ring-shaped while the cofferdam floating body is shaped like a skirt border; the bottom of the upper floating body is connected with the top of the cofferdam floating body; the upper floating body is arranged outside the first planting medium layer in a surrounding manner. Compared with the prior art, the ecological floating island has the advantages that the floating island can obtain high enough buoyancy and good wind wave resistance; the floating island is prevented from being attacked by wind wave and sinking and the overall stability of the floating island is improved; the floating island can achieve plant diversity, obtains good landscape effects, can become the habitat of various animals and is beneficial to building of a microenvironment ecological system.

A multifunctional large offshore buoy capable of diving and based on a green energy source comprises an upper layer structure and a ballast water spherical cabin. The multifunctional large offshore buoy is characterized in that the upper layer structure and the ballast water spherical cabin are connected through a framework, anchor beds are connected to an anchor chain retracting and releasing wheel below the ballast water spherical cabin through anchor chains, a water turbine is mounted on the ballast water spherical cabin, and the ballast water spherical cabin is internally provided with a seawater desalting device and a water storage tank; and the water turbine is provided with a power supply line group which is connected with the seawater desalting device, the seawater desalting deviceis provided with water inlet pipes which are arranged in seawater, a water outlet pipe is connected with the water storage tank, and the water storage tank is connected with a water outlet pipeline.The multifunctional large offshore buoy capable of diving and based on the green energy source has the beneficial effects that 1, wind, solar and tidal flow combined power generating is utilized to continuously supply power to the buoy, and the green and the environmental protection effects are achieved; 2, a high-definition camera is mounted, the defect that traditional radar cannot accurately track a small ship is overcome, and safety of water area near a port is ensured; and 3, excess electricity can be used for conducting seawater desalting, and the storage amount of ballast water is automatically adjusted according to the seawater amount obtained after desalting.

The invention provides a black box protective device, comprising a frame, a connecting mechanism, a gas generator, an air sac bag, a wrapping cloth and an inner connecting sheet, wherein the connecting mechanism is arranged at the hollow-out position of the frame, and the end part of the connecting mechanism is fixed in the frame; the gas generator is penetrated through the connecting mechanism; the central part of the air sac bag is fixed in the frame, and is penetrated through the connecting part of the frame and the connecting mechanism to wrap the frame, the gas generator and the connecting mechanism in the air chamber of the air sac bag; the wrapping cloth wraps the folded air sac bag therein, and is provided with a tearing line in advance; and the inner connecting sheet consists of a central sheet and flap sheets, wherein the flap sheet comprises a flap head, a flap root and a flap ledge. After the black box is popped from a plane, the invention provides an air sac bag protection. A plurality of soft antenna assemblies are arranged in an air sac, when the air sac bag is unfolded, one or a plurality of antennas is or are ensured upward, and thereby the reliable communication between the black box and the outside is realized.

The invention discloses an automatic anti-sinking lifesaving system for ships, and belongs to shipbuilding, ship repairing or ship accessories. Enough extra stability, wind resistance and reserve buoyancy can be provided for a ship, the reserve buoyancy can be rapidly and automatically released to make the ship float in the initial stage of ship sinking, and it is guaranteed that the ship is stable and does not sink. The system is characterized in that the main structure of the ship is not changed, and stabilization, stability maintenance and anti-sinking lifesaving effects can be provided ina full-time and all-around mode only by additionally arranging steel stability maintenance balance fins, a permanent floating body, a safety air bag, an automatic monitoring controller and a high-pressure air supply system. High-strength flexible synthetic fiber sandwich net cloth serves as a stress framework of the air bag, and PVC airtight coatings are arranged on the two faces of the cloth. Theair bag is rigidly fixed on the ship body by using a surrounding binding type binding band. The triple methods of a hanging pendulum type automatic sensing controller, remote liquid pressure sensors,floating ball liquid level switches and manual operation are used, so that full-time and all-around automatic sensing control is achieved, and life and property safety of the whole ship and all people on the ship is guaranteed.

The invention relates to a semi-submersible high-power offshore floating type wind power platform with flat lower floating bodies, which comprises a fan and a tower drum arranged at one end of the tower drum. The platform further comprises a platform body, a mooring cable and an anchoring foundation. The platform body is connected with the anchoring foundation and positioned through the mooring cable. The platform body comprises a plurality of stand columns, a plurality of lower floating bodies and a plurality of upper supporting rods. The lower floating bodies are in butt joint to form a polygonal structure, the stand columns are installed on the surfaces of the lower floating bodies and located at the vertexes of the polygonal structure, the upper supporting rods are arranged along the side lines of the polygonal structure and connected between the adjacent stand columns, and the other end of the tower drum is connected with any one stand column. The floating type wind power platformis simple in structure, the wave area of the stand columns is small, the flat lower floating bodies are located at the deep position below the water surface, the wave force borne by the body is small, movement of the platform in waves can be reduced, and the wave resistance of the floating type wind power platform is improved. Due to the fact that no supporting rod structure exists underwater, fatigue nodes are few, and maintenance of the platform structure is facilitated.

The invention discloses a brazed honeycomb panel internal floating roof storage tank. The storage tank comprises a tank body and a floating plate which is arranged in the tank body in a sliding mode,wherein the floating plate comprises a floating plate framework, a floating cabin structure and a sealing ring plate structure, the floating plate framework comprises an annular main framework and a net-shaped branch framework which is arranged in the main framework, the floating cabin structure is arranged in the floating plate framework and comprises a plurality of floating cabins arranged sideby side, the floating cabins are made of aluminum honeycomb panels, the floating cabins are connected together through sealing ribs and screws, and the sealing ring plate structure surrounds the edgeof the floating cabin structure and is tightly attached to the inner wall of the tank body so as to enable the space formed by the floating plate and the tank body to be in a sealed mode. According tothe storage tank, the phenomena of plate sinking or plate overturning caused by overweight and corrosion of the floating plate or aggregation on the plate surface are avoided, the floating cabins aretightly attached to one another and can make full contact with stored oil products, the gas space is completely eliminated, the use safety of the storage tank is ensured, in addition, volume capacityof the oil storage tank can be enlarged to a certain extent, and economic benefits are improved.

The invention discloses a marine acoustic measuring buoy system. The system comprises a floating body, an instrument cabin, a force device and an integrated single cable array, wherein the floating body is embedded in the outer side of the upper part of the instrument cabin; the lower face of the instrument cabin is connected to the integrated single cable array through a force device; an acoustic sensor is installed on the integrated single cable array; a signal wire of the acoustic sensor is connected to a control device of the instrument cabin, and lead fish is hung on the lower end of the integrated single cable array. By using the integrated single cable array, the marine acoustic surveying buoy system has the advantages of being simple in structure, light in weight, reducing the complexity of the system making process, bearing the weight of the array body well and playing a buffer role in the buoy system using process based on the connection of the array body and instrument cabin by a force device which acts as an array body bearing component. The marine acoustic surveying buoy system collects marine environmental noise signals, temperature and salinity and other sea environment parameters simultaneously at different depths under water according to the requirement of a project, and has a broad application prospect.

The invention relates to a semi-submersible type fan foundation and a semi-submersible type fan, the semi-submersible type fan foundation comprises three vertical stand columns and three horizontal buoyancy tanks, the three vertical stand columns are respectively located at the positions of three corners of a regular triangle, each horizontal buoyancy tank is connected with the bottoms of two adjacent vertical stand columns, a ballast tank and a channel are arranged in each horizontal buoyancy tank; an apron board is located on the outer edge of each horizontal buoyancy tank and horizontally extends outwards; a supporting rod assembly is used for connecting one vertical stand column and one horizontal buoyancy tank; and the three sets of mooring cables correspond to the three vertical stand columns one to one, one end of each set of mooring cable is connected with the bottom of the corresponding vertical stand column, and the other end of each set of mooring cable is connected with a mooring anchor anchored to the seabed. The semi-submersible type draught fan comprises a draught fan assembly and the semi-submersible type draught fan foundation, and the draught fan assembly is installed on the draught fan foundation. The semi-submersible fan foundation and the semi-submersible fan are good in structural stability, good in water depth adaptability and low in manufacturing cost.

The invention discloses a flying building block combination capable of allowing a user to combine and change at wills. The flying building block combination comprises a framework unit and a wing unit. The framework unit comprises a main frame building block, two wing frame building blocks, a cross connection building block and four wing connection building blocks. The cross connection building block can connect the main frame building block with the wing frame building blocks. Every two wing connection building blocks are connected to the two opposite end portions of each wing frame building block. The wing unit comprises two wing fans connected to the wing connection building blocks. The wing fans can provide buoyancy lift during gliding, in addition, the frame unit is driven via the wing connection building blocks, and the flying of the flying building block combination is supported.

The invention discloses a waterborne floating carrier. The waterborne floating carrier comprises a plurality of floating carrier units and floating body connection boards used for connecting the floating carrier units, each floating carrier unit comprises a floating body frame and an installation support arranged above the floating body frame through a base, the outside of the floating body frame is provided with outer projecting portions, the outside of each floating body connection board, corresponding to the outer projecting portions at the outside of the floating body frame, is provided with inner concave portions, and the outer projecting portions of the floating body frame are plugged into the inner concave portions of the floating body connection board so that the floating body frame is connected with the floating connection board. According to the waterborne floating carrier, the connection is reliable, the floating connection boards and the floating carrier units are connected in a sleeve semi-flexible manner so that the security and the stability of the connection are guaranteed; besides, a reliable maintenance channel is provided so that enough buoyancy can be provided for maintenance personnel, and the stability and the operability of the maintenance channel are guaranteed.

The invention discloses an air noise acquisition system taking a captive balloon as a carrying platform. The system can acquire noises at any points in the low-altitude range about 200m away from the ground. The system includes four parts, namely, a captive balloon set, a noise acquisition device, a total station space positioning system, and a ground power supply and signal acquisition system. The air noise acquisition device is connected with three ground fixed points through three light mooring cables, the captive balloon set provides lifting force for the air noise acquisition device, and the air measuring points are accurately positioned by means of a total station. A wired communication or wireless communication manner is selected based on the height of the air measuring points to transmit the acquired data back. Electrical leads are wound on the mooring cables to provide the power supply and wired communication transmission functions for the noise acquisition device.

The invention relates to a ship with a buoyancy anti-sinking system. The ship comprises a ship (1), wherein the ship is provided with a plurality of buoyancy tanks (2) as reserve buoyancy, and solid buoyancy modules (3) of high molecular closed pore foam resin is filled in the buoyancy tanks (2). When the ship body is damaged to leak, the solid buoyancy modules in the buoyancy tanks can ensure that the buoyancy tanks maintain sufficient buoyancy forces, thereby preventing the ship from sinking. The ship with the buoyancy anti-sinking system can further comprise an air compressor (4), a main air flue (5), a plurality of branch air flues (6), a plurality of one-way air valves (7) and a plurality of aeration bags (8). The aeration bags (8) are rolled into round bar shapes and fixed at the top of a voided passenger cabin, an engine room, a material cabin and a bunker or other voided parts of an inner cabin. When the ship is damaged and water flows into the ship, the air compressor can be started instantly to aerate the aeration bags, therefore, the buoyancy of the ship is quickly increased, the ship is prevented from sinking, and the life safety and the property safety are protected.

The invention discloses a built-in air bag type anti-collision device which comprises an outer steel wall plate and a lining steel wall plate, wherein an anti-collision cavity is formed between the outer steel wall plate and the lining steel wall plate; a counter weight pad layer is arranged at the bottom of the anti-collision cavity; multiple rubber air bags on the same plane are densely filled in the anti-collision cavity at the upper part of the counter weight pad layer; the lining steel wall plate is located on the outer side of a device needing protection; an energy absorption pad layer is arranged between the lining steel wall plate and the device needing protection; the outer steel wall plate and the lining steel wall plate are arranged on the same plane and have the same vertical height; the outer steel wall plate is an outward-protruding arc anti-collision plate; the devices needing protection are arranged on the two sides of a channel or road; and each device needing protection is an anti-collision guardrail, anti-collision wall or anti-collision column. The device disclosed by the invention has the advantages of reasonable structure design, low investment cost, long service life and good using effect, is convenient to construct, and can overcome the shortcomings of higher investment cost, shorter service life, poor anti-collision effect and the like of the anti-collision facility of the existing traffic tool.

The invention discloses a floating type tidal energy water turbine with a surging power device. The floating type tidal energy water turbine comprises a middle floating plate, a fixing rod and a limiting ring. Adjusting rods are movably installed in the two sides of the inner portion of the middle floating plate. Side floating plates are fixedly installed on the outer sides of the adjusting rods.The fixing rod is installed in the middle of the middle floating plate. The limiting ring is movably installed on the outer sides of the fixing rods. Adjusting grooves are symmetrically formed in thetwo sides of the middle floating plate. Positioning holes are reserved in the side faces of the adjusting grooves. Round rods are fixedly installed in the adjusting rods. A threaded rod is rotatably installed in the fixing rod. A threaded groove is formed in a limiting column. According to the floating type tidal energy water turbine with the surging power device, the novel structural design is adopted, so that the device can guide surging seawater, interference of seawater flowing in other directions is reduced, a depth adjusting mechanism and a buoyancy adjusting mechanism are arranged in the device, and the adjustability is high.

A vehicle-mounted oxygen supply device is characterized in that: the vehicle-mounted oxygen supply device is composed of a gas generator, an air bag, and an air guiding device, and the gas generator is composed of a container, a medicament, a water storage device, a switch, and a one-way valve Composition, the air guiding device is composed of a one-way valve, a catheter, and a breathing switch. When the vehicle falls into the water, the gas supply switch in the gas generator is turned on, and the internal reaction occurs to generate oxygen. The gas enters the airbag through the one-way valve, and the occupants of the vehicle can inhale oxygen through the breathing port, and at the same time, the exhaled gas passes through the one-way valve through the breathing port. And the guide of the catheter enters the gas generator, the carbon dioxide in the exhaled gas in the gas generator is absorbed by the medicine inside the generator, and the remaining oxygen enters the airbag and can be used again; when the occupants are trapped in the car, the device Oxygen can be provided to ensure that it will not drown. When the occupants of the vehicle can escape from the vehicle that fell into the water, the airbag can be used as a lifebuoy to provide sufficient buoyancy for the occupants.

The invention discloses a buoyant device for an amphibious operation drilling platform. The buoyant device includes two air bags I and one air bag II, wherein two sides of the bottom of a substrate are each equipped with one rectangular groove I; a rectangular groove II is formed in the middle part of the bottom surface of the substrate; the air bags I are folded and are arranged in the rectangular groove I; the air bag II is folded and is arranged in the rectangular groove II; three inflation mechanisms are arranged in the substrate; a booster pump is arranged on an air pipe; one end of the air pipe is communicated with an air outlet of a blower fan, and the other end of the air pipe penetrates through the substrate and then is communicated with the corresponding air bag I; the expanded air bags I after inflation are U-shaped; the expanded air bag II after inflation is T-shaped; and on the premise that when the buoyancy force generated by substrate when the substrate is immersed in the water is insufficient to ensure the floating state of the substrate can be maintained, the buoyant device which acts as an auxiliary buoyancy lifting device for the drilling platform to move on thewater surface, can supplement the lacked buoyancy force of the substrate and the operation platform through full expansion of the air bags I and the air bag II, and can ensure that the substrate can float on the water like a ship.

The invention discloses a bag with a lifesaving floatage function. The bag comprises a bag body, wherein a main gasbag is fixedly mounted at the top of the bag body; three auxiliary gasbags are fixedly mounted on three side walls of the bag body respectively; a gas box is fixedly mounted in the center in the main gasbag; a pull rod is arranged on one side of the main gasbag; a motor and a storage battery are arranged in the bag body; a switch is arranged on one side of the exterior of the bag body; propellers are arranged on the two sides of the bottom of the bag body; the motor is fixedly connected with two synchronizing wheels via a motor shaft; the two synchronizing wheels are movably connected with a left transmission belt and a right transmission belt respectively; the other end of the left transmission belt and the other end of the right transmission belt are connected with transmission rods in a sleeving manner; the other ends of the transmission rods are fixedly connected with the propellers; the switch is electrically connected with the motor; the bag is simple to operate and greatly increases a survival rate of victims compared with the traditional life buoy lifesaving devices.

The invention discloses a power pipeline optical cable laying auxiliary device and fabrication and construction methods thereof. The power pipeline optical cable laying auxiliary device comprises a cylinder of which the middle portion is cylindrical and two ends are arc-shaped tip end head portions respectively. An intermediate pipe is axially arranged in the cylinder in the central axis. One end portion of the intermediate pipe is connected on the arc-shaped tip end head portion inner wall of one end of the cylinder, and the other end of the intermediate pipe is fixed on the arc-shaped tip end head portion of the other end of the cylinder and extended to the outside. The end portion which is extended to the outside is provided with optical cable connection holes transversely. The fabrication method comprises the following steps: a) two half cylinders are fabricated; and b) the two half cylinders are connected to form the whole cylinder structure. The construction method comprises the following steps: a) the auxiliary device is installed on the head of a pipe pass-through machine and fixed; b) the pass-through rod of the auxiliary device is guided into the cable pipe hole; c) the auxiliary device passes through successfully and is floated on the surface of water; d) and an optical cable is fixed on the other end of the pipe pass-through machine and pulled out from the pipeline through the pipe pass-through machine so as to complete the optical cable laying process.

The invention discloses a combined water treatment impeller. The combined water treatment impeller comprises an impeller body, wherein the impeller body is a ring body, an inner cavity of the ring body is hollow, the ring body is formed by splicing an upper ring body and a lower ring body in the vertical direction, at least four blade bodies are uniformly distributed on the edge of the impeller body at intervals, and an inner cavity of each blade body is hollow. By adopting a split-type assembled structure, the combined water treatment impeller is ingenious in concept, the splicing process is advanced, the assembled structure is accurate in positioning, and the inner cavity of the assembled large-sized water treatment impeller is hollow, so that a sufficient floating force can be provided, and the overall design of the product is reasonable; compared with the prior art, the combined water treatment impeller is more suitable for a large-sized water treatment device.

The invention provides a waterproof tablet personal computer that comprises a shell, keys, a touch display screen, a camera lens, a loudspeaker sound outlet hole, a microphone sound outlet hole, an earphone hole and a TYPE-C hole, and the key, the touch display screen, the camera lens, the loudspeaker sound outlet hole, the microphone sound outlet hole, the earphone hole and the TYPE-C hole are all in sealed connection with the shell through a sealed waterproof structure, so that a sealed cavity is formed in the shell. According to the waterproof tablet personal computer, the shell is completely sealed through the sealed waterproof structure, and the sealed cavity similar to an air bag is formed in the shell, so that the waterproof tablet personal computer has enough buoyancy and cannot sink into water.

The invention belongs to the technical field of safety protection equipment for ports, and particularly relates to a net-type safe water surface arresting system. The arresting system comprises arresting units, and each arresting unit is formed in the mode that each light floating body is provided with a supporting column, every two adjacent supporting columns are connected through steel cables, and a net structure is woven on the steel cables; and the multiple arresting units are connected in series through connecting parts to form the safe water surface arresting system. Meanwhile, the invention provides the adjustable arresting steel cables which can adjust the tightness degree of the arresting units and are provided with net structures in a weaving mode, reinforcing structures of the arresting units and auxiliary protecting steel cable structures arranged among the arresting units are provided, and then the technical effects of the net-type safe water surface arresting system are better. Therefore, the net-type safe water surface arresting system is simple in structure, easy to install and maintain, firm in structure and capable of effectively intercepting unapproved ships fromentering the ports.

The invention discloses a ZFD type leaking stoppage system. According to the ZFD type leaking stoppage system, when well leaking occurs in the well drilling process, leaking stoppage can be conductedin time for many times under the condition without putting out of hole, well leaking complex accidents are dealt with, and the number of times of putting out of hole and running in hole can be effectively decreased. The ZFD type leaking stoppage system is more suitable for leaking stoppage in a well internally provided with various downhole instruments and downhole tools such as rotating guiding instruments, vertical guiding instruments, MWD instruments and screws, and the various downhole instruments can be effectively protected. Due to large and unblocked water holes of the ZFD type leakingstoppage system, the key sleeve type MWD instruments can be salvaged and put, and the advantages which other leaking stoppage tools do not have are achieved. A PBL leaking stoppage system is used generally currently, the effect is ideal, but the cost is high. Due to the fact that the ZFD type leaking stoppage system is provided with a basket pup joint, the key sleeve type MWD instruments cannot besalvaged and put. The ZFD type leaking stoppage system is easy to manufacture, high in practicability and less in investment. Bypass leaking stoppage is flexible and convenient, work reliability is high, the ZFD type leaking stoppage system can be widely applied to a petroleum well-drilling system, and comprehensive economic benefits of well drilling are increased.

The invention discloses a multi-axis low-altitude manned aircraft including an airframe and a cockpit. An airbag is arranged on that airframe, the airframe has four arms. A motor is provided on each arm. A motor is bolted to the head end of the arm; a rotating shaft is arranged in the center of the motor. A rotor is mounted on each shaft; the rotor is fixed on the motor by bolts and rotated by thecorresponding motor, and the cockpit is arranged in the center of the body, the cockpit is provided with a manned seat and an operation screen, the operation screen controls the movement of the wholeaircraft, a landing bracket is arranged at the bottom of the cockpit, and a battery and a standby battery are arranged between the body and the cockpit. The invention has excellent comprehensive performance and good flight performance and safety performance at the same time and can alleviate urban traffic congestion, reduce carbon emissions, and can achieve rapid delivery of passengers; In the event of a collision, the inductive airbag inflates automatically to maximize the safety of cockpit personnel.