77results about How to "Does not increase drag" patented technology

The invention relates to an ion exchange membrane with high current efficiency, and a preparation method thereof, and application of the ion exchange membrane to preparation of caustic soda in a chlor-alkali tank, and belongs to a compound membrane for producing alkali metal hydroxides and chlorine simultaneously in an ion membrane electrolytic tank. The ion exchange membrane with high current efficiency is characterized by being formed by compounding three layers of perfluorinated ion exchange resin base membranes and a reinforcing material; the three layers of perfluorinated ion exchange resin base membranes are sequentially a high-exchange-capacity sulfonic acid layer, a low-exchange-capacity sulfonic acid layer and a high-exchange-capacity carboxylic acid layer; and the reinforcing material is compounded on one side near the high-exchange-capacity sulfonic acid layer. The invention provides the ion exchange membrane which is high in current efficiency, mechanical strength and chemical stability, suitable for high and low alkali liquor concentration, and low in cost; the preparation method is simple; and in an electrolytic process, the electrolytic tank always keeps high current efficiency and low tank pressure; and products hydroxides have few impurities and are high in purity.

The invention provides a tail end control system and method of a variable-temperature-difference self-adaptive air conditioner. A variable-temperature-difference self-adaptive control method is adopted at the tail end of an air conditioning system, collected data are subjected to calculation to obtain the best temperature difference, a control system is used for controlling the actual temperature difference to reach or to be nearest to the calculated temperature difference, circulating freezing water temperature difference at the tail end of the air conditioner is made to change in a self adaption mode along with work conditions, flow constancy is maintained, and hydraulic balance of the whole air conditioning system is achieved.

The invention discloses a rolling brush structure with spiral blades. The rolling brush structure comprises a rolling brush body, hairs spirally arranged on the rolling brush body, a left connecting part and a right connecting part, wherein the left connecting part and the right connecting part are arranged at the two ends of the rolling brush body and connected with a suction chassis; the spiral blades are arranged on the rolling brush body; and the external ends of the blades are higher than the external ends of the hairs. The rolling brush structure has the advantages and positive effects that the spiral blades are respectively arranged between every two adjacent rows of hairs on the rolling brush structure, and when the rolling brush body rotates, the blades are rotated together, thus, certain axial flowing is brought to airflow when the spiral blades rotate, dust is blown toward the direction of a suction inlet, and the dust collecting efficiency of a dust collector is improved. Simultaneously, the external ends of the blades are higher than the external ends of the hairs, so that the hairs can be in contact with the ground or a carpet and can clean the ground or the carpet without being influenced, and the resistance occurred along with the rotating of the rolling brush body cannot be increased.

The invention discloses an automobile wheel casing fender structure, and aims to provide an automobile wheel casing fender structure which is capable of effectively improving the radiating effect of automobile wheels and wheel brakes. The structure comprises a plurality of radiating holes arranged on the fender on the front side of the wheels, wherein the radiating holes are strip-like and extend from the outer side to the inner side of the fender; the radiating holes are uniformly distributed from top to bottom; the upper edge of the radiating hole is provided with an air deflector extending in an inclined downward manner; and the air deflector extends from the root of the air deflector to the outside and comprises an inclining part close to the root of the air deflector and a guide part perpendicular to the fender.

The invention discloses an improved multifunctional butterfly plate based on an electric planer type shaft structure and a butterfly valve formed by the improved multifunctional butterfly plate. The two sides of the butterfly plate are respectively provided with an arch spherical protrusion, the arch spherical protrusion, on one side with a fluid inlet, of the butterfly plate is provided with three flow dividing channels used for flow division and pressure reduction, and the arch spherical protrusion, on one side with a fluid outlet, of the butterfly plate is provided with four flow dividing channels used for flow division and pressure reduction and provided with an installation hole part used for installing the butterfly plate in the radial direction. The multifunctional butterfly plate is improved based on a structure of a traditional butterfly plate of a standard flange type soft seal butterfly valve, high flowing speed of fluid passing through the butterfly plate can be reduced, the flow dividing channels can have the functions of flow division, pressure reduction, cavitation prevention, vibration prevention and noise reduction, and moreover when the butterfly valve is closed, the seal performance of a valve body can be improved.

An evaporation fuel purge system includes: a fuel tank; a canister that absorbs and desorbs evaporation fuel emitted from the fuel tank; an intake passage for an internal combustion engine in which the evaporation fuel desorbed from the canister is mixed with fuel for combustion; a purge passage that connects the canister to the intake passage; an ejector device disposed in the purge passage; and a fluid drive device. The ejector device has a nozzle part that accelerates external fluid. The fluid drive device sends outside air corresponding to the external fluid to flow into the nozzle part.

The invention discloses a range hood with a noise reduction structure. The range hood is characterized in that an air inlet cover is arranged between the air inlet of a smoke collecting cover and a machine box, the noise reduction structure is arranged on the outer side of the side wall of the air inlet cover, and the noise reduction structure comprises a noise reduction module and a thin film; the noise reduction module includes a shell, a first noise reduction channel located above and a second noise reduction channel located below are formed in the shell, and the first noise reduction channel and the second noise reduction channel are curved; a third noise reduction channel is also formed, between the first noise reduction channel and the second noise reduction channel, in the shell, and the third noise reduction channel communicates with both the first noise reduction channel and the second noise reduction channel so as to form a resonant cavity; a first noise inlet is formed at the joint of the first noise reduction channel and the side wall of the air inlet cover, a second noise inlet is formed at the joint of the second noise reduction channel and the side wall of the air inlet cover, and a noise outlet is formed at the joint of the third noise reduction channel and the side wall of the air inlet cover; and the thin film comprises a first film arranged at the first noiseinlet and the second noise inlet correspondingly and a second thin film arranged at the noise outlet.

The invention discloses a retractable angle-adjustable helicopter stub wing. A fuselage, an empennage and a stub wing are included, an undercarriage is mounted under the fuselage; a main rotor is installed at the top of the fuselage, the empennage is arranged at the tail end of the fuselage, the stub wing is arranged on the outer side of the middle of the fuselage, a storage cavity located in thefuselage is formed in the outer side of the stub wing, a hinge is installed at the tail end of the stub wing, a driver is installed in the storage cavity, and a center control box is arranged on the outer side of the driver. According to retractable angle-adjustable helicopter stub wing, the defect that the stub wing of a retractable helicopter cannot be unfolded in high-speed movement is overcome; the defect that the included angle between a stub wing and a fuselage of a retractable helicopter is fixed and cannot be adjusted is overcome, the stub wing can be adjusted when the helicopter fliesforwards at a high speed, flies in a circling maneuvering mode, hovers, takes off and lands vertically, flies at a low speed and slides down in an autoroatation mode, and power can be used to the maximum extent.

The invention provides a vertical type oil separator which comprises a vertical type barrel (4), an air inlet pipe (2), an air outlet pipe (7) and an oil separation assembly. The air inlet pipe (2) is arranged at the upper end of the vertical type barrel (4), the air outlet pipe (7) is arranged at the lower end of the vertical type barrel (4), and therefore a stroke from top to bottom is formed inside the vertical type barrel (4). The oil separation assembly comprises a centrifugal oil separator body and a filtration type oil separator body, wherein the centrifugal oil separator body and the filtration type oil separator body are arranged in an up-and-down mode. According to the vertical type oil separator, the treatment process combining rotation centrifugal force with refined filtration is comprehensively utilized, the kinetic energy of gas is utilized fully, most large-diameter oil drops are removed under the condition that resistance is not augmented, the requirement for a fine filtration period is lowered, the oil-gas separation process is thorough, and the oil separation effect is improved under the condition that the size of the barrel and the resistance are not increased.

The invention belongs to the field of electrical equipment, and relates to a sliding high voltage cable floating combination fixing device which comprises a lower plate component and an upper plate component connected to the surface of the upper portion of the lower plate component. A cable clamp is fixed on the top face of the upper plate component. The lower plate component comprises a bottom plate, a lower guide rail arranged on one side of the surface of the bottom plate, and a lower connection seat arranged on the other side of the surface of the bottom plate. The upper plate component comprises a top plate, an upper guide rail arranged on one side of the bottom face of the top plate, and an upper connection seat arranged on the other side of the bottom face of the top plate. The sliding high voltage cable floating combination fixing device is reliable in effect, when the sliding high voltage cable floating combination fixing device is used, cable moving can be limited in the vertical direction, and disorderly deviation can not occur; meanwhile, due to the effect of a spring, when a cable ascends through thermal stress, spring force can effectively counteracts the weight of the upper plate component, and resistance of the cable in the ascending process can not be increased.

The invention discloses flowing-water breeding equipment for loach. The equipment comprises a rectangular frame, floating blocks, slide rods, a net pocket, a still water platform, a telescopic rod assembly, a support frame, breeding boxes and a feeding apparatus, wherein a transverse rod and a vertical rod are arranged inside the rectangular frame, the floating blocks are installed on the side frames of the rectangular frame, the slide rods are sleeved with sleeves sliding along the slide rods, the net pocket is arranged in the rectangular frame, a breeding space is formed in the interior of the net pocket, the still water platform is arranged in the breeding space, the first end of the telescopic rod assembly is fixed to the intersection point, the second end of the telescopic rod assembly is connected with the still water platform, the support frame comprises support foots and a support horizontal plate, the interiors of the breeding boxes are provided with breeding rooms, the feeding apparatus comprises a feed hopper and a feed pipe, and the feed pipe extends downward to the interior of the net pocket. The apparatus aims at the problem that a traditional breeding box lacks stillwater areas, and provides relatively static and slow-flowing water areas for loach by setting a still water platform, and the apparatus is consistent with growth habits of loach and is beneficial tothe loach growth. By setting a support frame, the breeding boxes can be constructed above the flowing-water breeding equipment for loach through the support frame for animal and plant breeding, and the efficient utilization of the space is achieved.

The invention discloses an offshore wind power operation and maintenance ship stabilizing device which comprises a plurality of stabilizers capable of being contracted and released. The stabilizers are symmetrically mounted on two sides of an offshore wind power operation and maintenance ship and comprise actuators, connecting rods, stabilizing plates and fixing mechanisms, the fixing mechanisms are used for controlling free states of the stabilizing plates, the actuators are fixedly mounted on outer boards of the offshore wind power operation and maintenance ship, one end of each connecting rod is fixedly connected with the corresponding actuator, the other end of each connecting rod is rotatably connected with the corresponding stabilizing plate, and each fixing mechanism is positioned at the other end of the corresponding connecting rod. The offshore wind power operation and maintenance ship stabilizing device has the advantages that the offshore wind power operation and maintenanceship stabilizing device is simple in structure and high in reliability, and the stability of the operation and maintenance ship can be obviously improved by the offshore wind power operation and maintenance ship stabilizing device when the operation and maintenance ship is docked close to offshore wind power generator towers.

The invention discloses a pollution discharge apparatus installed on a water supply device. An A pipe and a B pipe and the B pipe and a C pipe are fixedly sealed and connected through buckle devices, the B pipe is provided with a pollution discharge port, a filter screen is installed in the pollution port of the B pipe and is fixedly connected with the inner side of a pollution discharge valve, and the pollution discharge valve is fixedly sealed and connected with the pollution discharge port through a buckle. According to the pollution discharge apparatus installed on the water supply device, the pollution discharge port is directly provided with the valve by use of a fast joint, a pipe is installed behind the valve, during pollution discharge, what is needed is only to open the valve, and the operation is convenient and fast; since the pollution discharge only needs one minute, normal water supply of the pipe and the device is not affected; and since a straight-through type structure is employed, the flow velocity of water is not affected, and the resistance is not increased.

The invention relates to a production process of synergistic urea. The production process comprises the following steps: leading branch urine out of a main pipeline of urine with mass concentration of95% after primary evaporation or a main pipeline of urine with mass concentration of 99.5% after secondary evaporation; mixing and dissolving the branch urine with a synergist and a defoamer uniformly to obtain a synergistic solution; sending the synergistic solution back to a main pipeline between an evaporator and a granulation system, and then entering a granulation step of the granulation system. The production process has the following advantages: (1) transferring from ordinary urea to the synergistic urea is more flexible and rapid; (2) fewer transition products are produced during transferring; (3) after transferring, the normal operation of a main unit of the ordinary urea is hardly affected; (4) the mass ratio of the amount of the branch urine taken out from the main pipeline tothe amount of urine of the main pipeline is 1:(5-50), and the influence on biuret content of a synergistic urea product is smaller.

The invention discloses a detachable cleaning device for a ship, and aims at providing the detachable cleaning device which is simple in structure, convenient to use and excellent in cleaning effect for the ship. The cleaning device comprises a main frame, and the left and right sides of the main frame stretch outward and are both provided with side plates, wherein the front end of the main frame is provided with a filter screen, the upper end of the main frame is provided with a main vertical pipe the lower end of which is fixedly connected to the middle part of the main frame, and meanwhile, the upper end of the main vertical pipe is hinged to a ship head; during cleaning, the bottom of the main frame and the bottom of the filter screen are both submerged in water. The detachable cleaning device for the ship is applied to the technical field of operation tools at sea.

The invention provides a single-track wall-climbing robot. The single-track wall-climbing robot comprises a walking device and a steering device, the steering device comprises a connecting rod; a rotating piece capable of rotating around a first axis is arranged at one end of the connecting rod; the first axis is parallel to the walking direction of the walking device; an electromagnet capable of rotating around a second axis is arranged on the rotating piece; the second axis is perpendicular to the first axis; the end, away from the electromagnet, of the connecting rod is connected with the walking device through a supporting frame. The supporting frame is rotationally connected with the connecting rod, and the rotating axis is parallel to the first axis. When the electromagnet is not electrified, the electromagnet is suspended; after being electrified, the electromagnet descends and is adsorbed on the wall surface, the walking device can rotate by taking the electromagnet as the center, and finally steering is realized; after the steering is completed, the electromagnet is powered off, so that the whole electromagnet is lifted; stable steering is achieved, and meanwhile the resistance generated when the robot does linear motion is not increased.

The invention provides a piece of shouldered swinging assisting suit. The shouldered swinging assisting suit is that cylindrical floating blocks are sewed in a cylindrical suit body, and the cylindrical floating blocks and the cylindrical suit body are tightly fixed on the shoulder and back parts of a human body under the tying effect of shoulder traps, waist traps and chest traps which are all sewed on the suit body, so that a user wearing the suit can naturally and horizontally float in the water. By adopting the shouldered swinging assisting suit, the user can naturally and horizontally float in the water, the resistanceto the human body in the water is not enhanced, and a beginner of swinging can be prevented from falling in the water due to a top-heavy condition.

The deacidification method adopts the gas mixture obtained via hydrogen combustion as fluidizing gas to deacidify nano SiO2 inside the fluidizing reactor, with the fluidizing deacidification temperature being 300-500 deg.c, fluidizing gas speed being 2-15 cm / s, pH value of SiO2 after deacidification being greater than 4 and water content being lower than 2%.

The invention relates to the technical field of fire-fighting equipment, and discloses a control structure of a fire-fighting extinguisher valve. The control structure comprises a valve sleeve, a valve element and a valve rod, wherein the valve rod is movably sleeved with the valve element, an upper pressing plate and a lower pressing plate are fixedly arranged at the positions, located on the upper side and the lower side of the valve element, of the outer part of the valve rod respectively, the upper pressing plate is used for driving the valve element to move downwards, the lower pressing plate is used for driving the valve element to move upwards, a rubber ring I is fixedly connected to the position, located on the periphery of the valve rod, of the bottom end of the valve element, anda rubber ring II which is arranged corresponding to the rubber ring I is arranged at the top end of the lower pressing plate. According to the control structure, the valve rod is movably sleeved withthe valve element, and the upper pressing plate and the lower pressing plate which are positioned on the upper side and the lower side of the valve element respectively are used for controlling the valve rod to operate the valve element to move up and down, so that the upper side air pressure and the lower side air pressure of the valve element are balanced through separation of the lower pressing plate and the valve element, while the sealing performance is guaranteed, the pressing resistance of a pressing handle due to the inner and outer pressure difference of a bottle is greatly reduced,then, a sealing structure of the valve element is opened by manually pressing the valve rod, and then the effect of being more labor-saving is achieved.

The invention relates to an active flow control device and method for attitude adjustment of an airship and a fixing device for the active flow control device. The active flow control device comprises a plurality of active flow control arrays fixed on the airship, which are placed on the surface of the hull of the airship respectively, wherein opening and closing of a part or all of the active flow control arrays are changed to realize attitude adjustment of the airship; each active flow control unit includes a substrate and an electromagnetic drive vane array; the electromagnetic drive vane array is composed of one or more electromagnetic drive vanes respectively fixed on the substrate through a rotary shaft; and a closed state is formed through rotation of the rotary shaft and fitting of the substrate, or an opening state is formed through forming an angle with the substrate. The active flow control device changes the symmetry of fluid around the whole body of a flying airship to generate a control moment for pitching or yawing, and replaces or matches with control planes and vector propellers to completely control or assist controlling flying attitude of the airship, so that the active flow control device can output a more stable control torque under a high wind speed to complete predetermined navigation.

The invention provides an electric car adopting wind energy. The electric car comprises a car body, a wind power generation unit, a storage battery and a main electric motor. The wind power generation unit is connected with the storage battery and used for converting the wind energy into electric energy and then storing the electric energy into the storage battery. The main electric motor is connected with the storage battery and used for converting the electric energy into kinetic energy driving the car to drive. The electric car is characterized in that the wind power generation unit is arranged at the front end of the car body. The electric car aims to save the energy, the air resistance in the driving process of the car is converted into the electric energy, the electric energy is stored into the storage battery and supplements power for driving of the car, tail gas exhaust can be effectively reduced, and pollution can be reduced.

The present invention provides a sand classifying-conveying-dehydrating device for continuously providing classified sand to a dehydration process, which enables to significantly improve a working efficiency and decrease a space for installing the device. To provide a sand classifying-conveying-dehydrating device for recovering sand from a material including water and sand, comprising: a classifier (100) for transferring the sand contained in the material from upstream to downstream; a dehydrator (300) for removing the water contained in the sand; and a conveyor (200) for delivering the sand from the classifier to the dehydrator, wherein the classifier, the conveyor and the dehydrator are integrally connected in sequence from upstream to downstream.

The invention discloses an ozone denitration pre-sprinkling adsorption device, which comprises an oxygen preparation device, an oxygen conveying pipeline, an ozone generator device, an ozone conveyingpipeline, an ozone distribution device, a main flue, a pre-sprinkling absorption device and a wet desulphurization device, wherein the oxygen preparation device and the ozone generator device are connected through the oxygen conveying pipeline; the ozone generator device and the ozone distribution device are connected through the ozone conveying pipeline; the ozone distribution device and the main flue are connected; the main flue and the pre-sprinkling absorption device are connected; the pre-sprinkling absorption device is connected with the wet desulphurization device.

The invention belongs to the field of automobile brake, speed reduction and power generation devices, and particularly discloses a brake, speed reduction and power generation device. The device comprises a mechanical part and a circuit part. The mechanical part comprises a coil support installed on the inner side of a rear wheel hub, a support provided with a cavity, a support base fixedly installed on an axle, a pull line and an elastic element, wherein one end of the pull line is connected with a brake pedal. The circuit part comprises a permanent magnet, a coil, a rectifier, wires and an energy storage device. The permanent magnet is fixed to an edge frame of the support, the support is connected to the support base in a sliding mode, and the elastic element is arranged between the support and the support base; the coil is fixed to the coil support, and the coil support is located in the cavity formed by the support; the other end of the pull line is connected with the support; the coil is connected with the rectifier through one wire, and the rectifier is connected with the energy storage device through the other wire. The device adds too much extra loads to an automobile when the whole automobile runs, normal running of the automobile is affected, and extra resistance is added when the whole automobile runs.

The invention discloses a low voltage driven knife-type gate valve body. The low voltage driven knife-type gate valve body comprises a valve body, wherein a cavity is formed in the valve body; one side of the lower part of the cavity is communicated with a pipe joint at an inlet end; the other side of the lower part of the cavity is communicated with the pipe joint at an outlet end; a position, communicated with the pipe joint at the inlet end, inside the cavity, is provided with an annular step; a gate plate is mounted inside the cavity and forms close fit with the annular step; a valve seat is mounted at the top of the cavity; a valve rod is arranged inside the valve seat; the valve rod and the valve seat are sealed by a sealing part; the lower part of the valve rod is provided with external threads. The low voltage driven knife-type gate valve body disclosed by the invention has the advantages of being long in service life, low in fault rate of an executing mechanism, capable of being maintained in the current state after the power is off and needing no continuous power supply, relatively low in energy consumption, stable in operation, unlikely to block by foreigner materials and unlikely to rust and deform; the gate plate can be completely opened without increasing the resistance of the system and without moving up and down; during installation, no space needs to be preset in the upper direction; meanwhile, the sealing effect of the low voltage driven knife-type gate valve body is effectively improved.

The invention discloses a heating type stock bin breathing device. The heating stock bin breathing device comprises a body system composed of an inner shell, an outer shell, a filter element, a connection flange, a filter element fixing flange and a cover plate, a heating system composed of a hot fluid medium inlet pipeline, a hot fluid medium outlet pipe and a jacket formed by the inner shell and the outer shell or a heating system composed of a tracing pipe, aluminum foil and a heat-preserving layer, and an ash removing system composed of a cylinder, an electromagnetic valve, a pulse pipeline and an exhausting pipeline. The heating type stock bin breathing device has the beneficial effects that the breathing device is simple in device technology and elements can be maintained and replaced conveniently; vibration dust removal or pulse jet cleaning dust removal is performed, powder attached to the filter element can be cleared away regularly, and equipment resistance cannot be increased; after the temperature of the wall face of the inner shell and the temperature around the filter element are raised properly, water vapor carried by airflow in a stock bin cannot form water drops on the surface of an object, and therefore the situations that bag pasting happens to the filter element and the inner shell and the exhausting pipeline cake and are blocked cannot be caused; and the frequency of overhead work is greatly reduced, and workloads and dangerousness of maintenance are reduced.

The invention discloses a piezoelectric energy harvesting device of a bicycle. The device comprises a pedal spindle and a foot rest hub. Bearings sleeve two ends of the pedal spindle respectively. Twoends of the foot rest hub are assembled to the bearings so as to allow the foot rest hub to sleeve the exterior of the pedal spindle. The bearings are arranged between the pedal spindle and the footrest hub. Multiple permanent magnets a or piezoelectric energy harvesting units are adhered to the inner surface of the foot rest hub and the outer surface of the pedal spindle. The permanent magnetsa are not in contact with the piezoelectric energy harvesting units. The permanent magnets a and the piezoelectric energy harvesting units rotate relatively through rotation of the foot rest hub and the pedal spindle. The foot rest hub and the pedal spindle rotate relatively through rotation of the bearings. According to the invention, power can be continuously provided for power consumption elements of the bicycle; stability is high; efficiency is quite high; and riding resistance is not increased.

The outward-turning and bending die comprises modules, the modules comprise an outer module and an inner module, the top of the outer module comprises a pair of inclined plates arranged in a mirror image mode, and the distance between the tops of the two inclined plates is larger than the distance between the bottoms of the two inclined plates; the two inner modules are arranged between the two inclined plates in a mirror image mode, and the cross section track of each inner module is in an L shape. The elastic piece comprises a transverse pressure spring and a vertical pressure spring; a guide column penetrating through the inclined plate is fixed on the inner module, and a transverse pressure spring is sleeved on the guide column; the vertical pressure spring is arranged in the outer module and below the inner module, and a jacking block in contact with the bottom of the inner module is arranged at the top of the vertical pressure spring; and the transverse pressure spring and the vertical pressure spring provide outward turning elastic potential energy for the two inner modules. By means of interaction of the transverse compression spring and the vertical compression spring, large elastic potential energy is provided, and blockage caused by discharging is avoided. The transverse compression springs are pulled towards the two sides, the vertical compression springs are ejected upwards, and the requirement for the elastic force of each compression spring is low.

The invention relates to a simple environment-friendly buoy with balance weights easy to adjust. The buoy comprises a buoy tail, a buoy body and a buoy foot which are sequentially arranged from top tobottom; and the buoy further comprises a plurality of balance weight pieces, each balance weight piece is provided with a label for marking the weight of the balance weight piece, the buoy foot is ofa hollow structure, the balance weight pieces can be placed in the buoy foot, the bottom of the buoy foot is detachably connected with a nut in a threaded manner, or the bottom of the buoy foot is detachably sleeved with a plug, so that the balance weight pieces placed in the buoy foot are prevented from falling off. The balance weight pieces can be taken out from the interior of the buoy foot tobe repeatedly recycled, and environmental protection is achieved; the labels with marked weights are arranged on the balance weight pieces, so that only the balance weight pieces with the required weights need to be taken out and put into the buoy foot during fishing, and time is saved; the weights of the balance weight pieces in the buoy foot are very convenient to replace and debug, only the balance weight pieces only need to be replaced or increased or decreased in the buoy foot, and the balance weight pieces are easy to adjust; the buoy foot turns over quickly and enters water quickly; and the balance weight pieces are placed in the buoy foot and are isolated from external water and sundries, so that the interference of the environment is reduced, and an obtained fishing signal is more accurate.