71results about How to "Timely action" patented technology

The invention discloses a preceding start processing method, device and system. The method is used for the preceding start processing system, and the system comprises a video sensor and a gravity sensor. The method comprises the steps: collecting a vehicle head front image of a current vehicle through the video sensor, and collecting the acceleration information of the current vehicle through the gravity sensor; determining the driving state of the current vehicle based on the image features and / or acceleration information of the vehicle head front image; obtaining a movement track of a target object in the vehicle head front image when the current vehicle is in a driving state; judging whether to generate prompt information for reminding the current vehicle from starting according to the movement track of the target object. According to the invention, the method solves a problem that the start prompt of a preceding vehicle cannot be carried out accurately in a driving process in the prior art, and can timely remind the current vehicle of operating when a preceding vehicle of the current vehicle moves a certain distance.

The invention provides a double-station automatic grinding and cutting machine for ceramic green body tubes. The machine includes a machine frame, a storage silo, a feeding mechanism, a delivery mechanism, a ceramic green body tube grinding station and a ceramic green body tube cutting station; the ceramic green body tube grinding station is on the left side of the cutting station; the left side of the feeding mechanism is provided with the storage silo, a feeding air cylinder is located at the tail end of the storage silo, and the tail end of a storage silo supporting beam is fixedly provided with a guide plate for ceramic green body tube dropping; the delivery mechanism includes a delivery bracket driving air cylinder and a double-V-shaped groove delivery bracket which are fixed together, and the side of the double-V-shaped groove delivery bracket is fixedly provided with a guide slider; the grinding station includes a core-free supporting wheel, a magnetic-driving device and an abrasive belt grinding device; the cutting station includes a core-free supporting wheel, a magnetic-driving device and a cutting device and further includes a workpiece discharging mechanism. The machine has the advantage that ceramic green body tube surface grinding and ceramic green body tube two-end excess material cutting can be achieved with one machine.

The invention relates to a vehicle intelligent identification or anti-theft system, and specifically to an intelligent Skynet system obtained through improvement on the basis of the existing Skynet project. The vehicle intelligent identification or anti-theft system comprises: 1) an identifiable mark arranged on a vehicle main body, 2) a mark identification device mounted on the Skynet project, and 3) a terminal device, wherein the terminal device comprises a computer installed with a vehicle mark database, an input device, a comparison device, and a storage device for information obtained by the mark identification device.

The invention discloses a method for realizing system energy saving, and belongs to servers and the technical field of storage and high-performance cluster energy saving. The method structurally comprises a power supply unit and a server mainboard system unit, wherein the power supply unit is connected with the server mainboard system unit and supplies electric power to the server mainboard system unit, and comprises an AC / DC (Alternating Current / Direct Current) conversion module, a DC / DC conversion module, a sampling quantization circuit and a PMBUS (Power Supply Management Bus) module, and the server mainboard system unit is composed of a DC / DC conversion module, a mainboard hardware monitoring chip, a CPU, a north bridge chip, a south bridge chip and other control chips; the DC / DC conversion module of the power supply unit is connected to the DC / DC conversion module of the server mainboard system unit, and the PMBUS module of the power supply unit is connected to the DC / DC conversion module and the mainboard hardware monitoring chip of the server mainboard system unit. Compared with the prior art, the method can reduce the total energy consumption of a device to a certain extent, and has strong practicability.

The invention provides an electromagnetic lateral active vibration damping system and a control method and device thereof, By setting an electromagnet controller in the electromagnetic transverse active damping system, the electromagnet controller can determine the target clearance value of the electromagnet active damper according to the obtained transverse acceleration of the train, the positioninformation of the train and the train speed, and control the action of the electromagnet active damper according to the determined target clearance value of the electromagnet active damper. The electromagnet controller adopts the electric control mode to control the electromagnet active vibration absorber, which improves the response speed of the electromagnetic lateral active vibration absorbersystem, and makes the electromagnetic lateral active vibration absorber system operate in time at the position where the car of the high-speed train tilts or shakes.

The invention provides an automatic presser foot lifting device of a sewing machine. The automatic presser foot lifting device of the sewing machine comprises a drive source, a transmission lever, a lifting frame, a pressing rod, a pressing rod guide frame and a presser foot. The drive source is fixed to a shell of the sewing machine. The drive source comprises a telescopic shaft. The transmission lever comprises a pivot, a long arm of force and a short arm of force, wherein the pivot is hinged to the shell of the sewing machine, and the long arm of force and the telescopic shaft of the drive source are hinged to the two ends of a connecting rod respectively. The lifting frame comprises a bottom frame and a side frame, wherein the upper end of the side frame is hinged to the short arm of force. The pressing rod guide frame and the presser foot are fixed to a pressing rod body. The portion, below the pressing rod guide frame, of the pressing rod body is matched with a first guide sleeve fixed to the shell. The upper end of the pressing rod is matched with a second guide sleeve fixed to the shell. The lower end face of the pressing rod guide frame is attached to the upper end face of the bottom frame of the lifting frame. According to the automatic presser foot lifting device of the sewing machine, automatic pressure foot lifting motion of the sewing machine can be achieved through the drive source under the action of a small drive force, so that the drive source is small in size and low in manufacturing cost, the sewing machine is more attractive, and packaging and transportation of the sewing machine are facilitated.

The invention relates to compressed air measuring and controlling system and method for a power plant instrument. The compressed air measuring and controlling system can effectively monitor compressed air so that and the pneumatic equipment in a power plant acts more reliably and timely. The compressed air measuring and controlling system comprises an air storage tank, wherein the air storage tank is connected with a measuring loop, a sweeping loop is connected between the air storage tank and the measuring loop, the measuring loop is provided with a pressure control loop, the tail end of the pressure control loop is connected with a third needle valve, the sweeping loop comprises a reducing valve, a first needle valve and an oil and water filtering device which are sequentially connected, the reducing valve is connected with the air storage tank, the oil and water filtering device is connected with the pressure control loop, and the devices are connected with a decentralized control system.

The invention provides a caster wheel, belongs to the technical field of machinery, and solves the problems of small damping range and poor buffering effect in the conventional damping spring caster wheel. The caster wheel comprises a foot stand capable of being mounted at the bottom of equipment and a wheel connected with the foot stand, wherein a through connection hole is formed in the side part of the foot stand; a transmission shaft capable of rotating is arranged at the connection hole; a buffer rod is arranged between the transmission shaft and the inner wall of the connection hole; the buffer rod is compressed under the action of gravity of the equipment; supporting plates are fixedly connected to the two ends of the transmission shaft; and the other ends of the supporting plates fixedly connected with the transmission shaft are connected with the wheel. The caster wheel has the advantages of good damping and buffering effects, long service life, simple structure and the like.

The invention discloses a brand-new photovoltaic grid-connected inverter multi-wave-crest MPPT algorithm. The brand-new photovoltaic grid-connected inverter multi-wave-crest MPPT algorithm includes determination of a working voltage meeting formula of a photovoltaic system, determination of a shadow judgment formula and shadow scanning and comprises the specific steps of firstly determining the working voltage meeting formula of the photovoltaic system, determining the shadow judgment formula according to the determined working voltage meeting formula of the photovoltaic system after the working voltage meeting formula of the photovoltaic system is determined, and performing shadow scanning after the judgment formula is determined. When a local shadow is produced, a local best working point is possibly located on the right side or the left side of the best working point in the last minute, but it is unknown whether a current working point is the best working point of the system or not at the moment, scanning is required to be performed again, other local best working points are found out and compared, and then the position of the highest one of the powers of the best working points found out in the comparison process is the best working point of the system.

The invention belongs to the technical field of numerical control machine tool and in particular relates to a cutter selection device of a rotary tower cutter warehouse of a numerical control machine tool. A cutter motor is arranged on a base; the cutter motor drives a sliding shaft sleeve and a cutter shaft to rotate through a transmission belt and a driven wheel; the sliding shaft sleeve is connected with a cutter shaft through a second clutch disc; a piston rod of a small cylinder is connected with the sliding shaft sleeve and drives the sliding shaft sleeve to slide in the driven wheel so as to realize on-off between the sliding shaft sleeve and the cutter shaft through the second clutch disc; the sliding shaft sleeve can realize sliding and synchronous rotation in the driven wheel through sliding teeth; the outer end part of a camshaft of a large cylinder which is arranged on the base and is connected with a cylinder piston is fixedly connected with a cutter disc and can drive the on-off between the cutter disc and the base; a motor of the cutter disc drives the camshaft and the cutter disc to rotate through a separation mechanism of the cutter disc; and the action of the motor, the large cylinder and the small cylinder is controlled through a controller. The cutter selection device has the advantages that the cutter selection device has a simple structure, low cost, low working noise, convenient mounting and maintenance and is suitable to be popularized and applied to various numerical control machine tools.

The invention discloses a reclosing and emergency control integrated optimization method for a power grid based on a DSR (Dynamic Security Region). The reclosing and emergency control integrated optimization method comprises the following steps: analyzing a reclosing time domain of a system by adopting a method of the DSR; combining emergency control quantitative analysis and an optimal time emergency control strategy of the DSR; integrally optimizing the reclosing and the emergency control. The invention provides an optimal reclosing time scheme with the DSR as the reference when permanent faults occur; according to the method, the impact of unsuccessful reclosing on the system stability can be effectively relieved, and a safety limit of the system is improved.

The invention relates to automatic rain shielding devices for animal husbandry, in particular to an automatic rain shielding device for animal husbandry outdoor captivity. According to the provided automatic rain shielding device for animal husbandry outdoor captivity, automatic rain shielding can be completed without many persons, the rain shielding process is small in difficulty and short in time, the rain shielding effect is good, safe and reliable, and a measure can be taken to a captivity fold in time. In order to solve the technical problems, the automatic rain shielding device for animal husbandry outdoor captivity is provided and comprises a supporting rod, a telescopic rod, an electric wire winding wheel, a first draw cord, a first spring, a U-shaped communication box, a movable plate, a first button, a water receiving funnel, a guide rod and the like; the U-shaped communication box and the supporting rod are arranged on the ground; the supporting rod is located on the right of the U-shaped communication box; and the water receiving funnel is connected to the upper left portion of the U-shaped communication box and communicates with the U-shaped communication box. By means of the automatic rain shielding device for animal husbandry outdoor captivity, automatic rain shielding can be completed without many persons.

The invention relates to the technical field of chemical plant safety management and control, and particularly to a chemical plant safety supervision, training and assessment system and method with post instructions. The system includes a data collection unit, a data processing unit, a memory and multiple interactive terminals. The data collection unit communicates with DCS of a chemical plant andreads monitoring data of the chemical plant. The interactive terminals include machine frames, display screens, display screen drivers, cameras, voice conversation devices and alarms. The machine frames are installed near work posts of chemical plant employees. The display screens, the cameras, the voice conversation devices and the alarms are all fixedly installed on the machine frames. The display screen drivers are in communication connection with the data processing unit. The data processing unit is in communication connection with a communication module. The substantial effects of the system are that effects of training can be improved, execution effects of predetermined plans of the chemical plant are effectively improved, and accident loss is reduced.

The invention relates to a damping type over discharge buffering device for a mine hoisting system. The damping type over discharge buffering device comprises a steel truss, a damping buffer and a buffering bracket, the steel truss is arranged on the mine wall of the bottom of a mine, one end of the damping buffer is connected with the steel truss, the other end of the damping buffer is connected with the buffering bracket, and a cage of the mine hoisting system falls on the buffering bracket during falling. By means of the damping type over discharge buffering device, a new over discharge prevention device is designed; the damping type over discharge buffering device is installed above over discharge prevention space at the mine bottom of the mine, the steel truss is arranged at the mine bottom, an over discharge prevention buffering device is hung on the steel truss, a damping groove is formed in a piston rod of a hydraulic cylinder, the depth size of the damping groove is changed along with stroke changes, the problem of insufficient over discharge prevention space of old mine transformation is solved, the over discharge prevention device can be additionally arranged in an old mine hoisting system, and security coefficients of mine production can be effectively improved; meanwhile, construction is simple, the construction period is short, the old-mine transformation halt period is short, and the old mine safety transformation problems are decreased as many as possible.

The invention belongs to the field of power supply and distribution of low-voltage systems and solves the problem that the current-carrying capacities of main cables or main busbars are not reasonably matched with the passing current in the full path in the mode that a power supply circuit is connected with a plurality of electrical units. The system adopts the mode that the main cables or main busbars with different sectional areas are connected according to stepped variation of the current-carrying capacities and is provided with one-circuit sectional variable diameter main cables or main busbars. The main cables or main busbars are connected with a plurality of electrical units. The current-carrying capacities of the cables or busbars are reasonably matched with the passing current on the whole sections of the main cables or main busbars. Meanwhile, secondary circuit breakers are arranged on the variable diameter parts of the main cables or main busbars and are used for sectional protection of the cables or busbars with different current-carrying capacities in the same circuit together with a main circuit breaker. In the method, the main and secondary circuit breakers act timely when the main cables or main busbars have faults while the materials and the manufacturing cost are saved, not only the requirement of power supply reliability is satisfied, but also the fault range is accurately judged so as to be convenient for rush repair.

The invention discloses an electrochemical device and an electronic device. A first conductive part of a protector extends into a first shell and is electrically connected with an electrode assembly, or a first tab electrically connected with the electrode assembly extends from the inside of the first shell to the outside of the first shell and is connected with the first conductive part; the protector and the electrode assembly are electrically connected by multiplexing the existing first conductive part and / or the first tab; and welding spots are few, so that timely action of the protector is facilitated, the risk that the shell is punctured can be reduced, and the safety performance of the electrochemical device and the electronic device is improved.

The invention discloses an anti-crossing road isolation fence. The fence comprises multiple mounting seats, a protective structure is arranged at the upper end of each mounting base; the protective structure comprises a guardrail fixed at the upper end of the mounting base; a control groove is formed in the guardrail, a lead screw is inserted into the upper end of the control groove in a penetrating mode, a stress triggering mechanism is connected to the side wall of the lead screw, two symmetrically-arranged power magnetic blocks are fixed to the inner top of the control groove, and two symmetrically-arranged compression grooves are formed in the inner bottom of the control groove. The anti-crossing road isolation fence has the advantages that when a pedestrian climbs over the isolation fence, a pressing plate is pressed in the climbing process by means of force, the screw rod moves downwards, so that a magnetism isolating plate is rotated and dislocated, a sliding magnetic block slides under the magnetic force effect of the power magnetic block, air is conveyed to air cylinders of the adjacent guardrails, corrugated pipes on the adjacent guardrails are unfolded upwards, the height of the guardrails at the climbing position of a climber is increased, and the climber cannot climb over the guardrails.

The invention discloses a door closing device for a flammable liquid storage safety cabinet, and belongs to the technical field of storage cabinets. Cylinders are symmetrically mounted on the two sides of the inner part of a storage cabinet; the cylinders are connected with cabinet doors in corresponding positions through cylinder pull rods; a fixing plate is mounted at the upper end of the inner part of the storage cabinet; the front end of a first connecting rod is fixedly connected with a left cabinet door; the front end of a sixth connecting rod is fixedly connected with a right cabinet door; a limiting nut is arranged on the left side of the fixing plate; a sliding rail is arranged on the right side of the fixing plate; a baffle rod is arranged at the front end of the fixing plate; a fixing slot is formed in a fourth connecting rod. The door closing device is reasonable in design; the safety cabinet doors are driven by the cylinders, the left cabinet door can be closed firstly and then the right cabinet door can be closed orderly and slowly while the cabinet doors are closed through interaction of the six connecting rods and the rail, and the whole action is timely, safe and orderly, so that the safety of the flammable liquid storage cabinet is greatly improved.

The invention discloses an emergency hydraulic system of a center hydraulic transmission hydraulic lifting harrow thickener. The series problems caused by power failure of the thickener are solved. The emergency hydraulic system is characterized in that a hydraulic bottom plate block is arranged, a low pressure overflow valve, a high pressure safety valve, a reversing valve I, a throttling valve, a one-way valve II, a pressure reducing valve and a reversing valve II are arranged on the hydraulic bottom plate block, and a hydraulic motor, a one-way throttling valve, an oil cylinder, an electromagnetic ball valve II, an oil return oil filter, an energy accumulator inlet one-way valve, a hydraulic energy accumulator, a pressure detector, a nonelectric lifting harrow electromagnetic ball valve, a manual stop valve, a pressure gauge, a pressure sensor, a nonelectric lifting harrow ball valve connecting emergency power supply and the like are respectively connected through pipelines. According to the emergency hydraulic system of the center hydraulic transmission hydraulic lifting harrow thickener, high pressure oil is stored through the hydraulic energy accumulator, the high pressure oil is released during power failure, and nonelectric automatic harrow lifting is achieved. The emergency power sully is used, so that the nonelectric lifting harrow electromagnetic ball valve is in a normally-closed state and is opened when sudden power failure happens, the nonelectric lifting harrow electromagnetic ball valve is opened by the emergency power supply, the high pressure oil is made to automatically enter an oil cylinder lifting harrow, and the facts that materials press the harrow and a pool is cleared are avoided.

The invention discloses a lead frame clamping system used in a semiconductor packaging system. The lead frame clamping system comprises a clamping system, wherein the clamping system comprises a material loading clamping device and a material fetching clamping device; the material loading clamping device and the material fetching clamping device comprise multiple pairs of pneumatic manipulators; each of the pneumatic manipulators comprises an air cylinder which is provided with a piston rod therein; the side wall of the air cylinder is rotationally connected to a clamping jaw whose section is inverted-L shaped; one end of the clamping jaw is positioned outside the air cylinder, and the other end is extended in the air cylinder; the middle section of the piston rod is provided with a circle of recessed part adaptive to the clamping jaw end part; the bottom, positioned outside the air cylinder, of the clamping jaw is provided with a claw hook. According to the system, the material loading clamping device and the material fetching clamping device both adopt multiple pairs of pneumatic manipulators for series actions; during operation, the pneumatic manipulators are distributed at two sides of the lead frame and timely, accurately and quickly clamp the lead frame; the clamping jaw stays open status at the beginning; the problem of lead frame deformation due to the clamping jaw hitting on the lead frame during clamping the lead frame can be avoided.

The invention provides a surge protection circuit and a surge protector. A high-voltage pulse signal is collected and output through a collection unit, wherein the high-voltage pulse signal is used for representing a surge signal in a power supply or signal circuit of a protected load; the high-voltage pulse signal is conditioned through a conditioning unit to generate a trigger signal; the trigger signal is loaded to a first discharge unit to ensure the conditions that the first discharge unit can timely act and surges on the power supply or signal circuit are discharged; and a second discharge unit can clamp the surges on the power supply or signal circuit into a withstand voltage range of the protected load. According to the surge protection circuit and the surge protector, the condition that the first discharge unit can be timely triggered is ensured through collecting and conditioning processes; and the problem of inter-stage coordination between the first discharge unit and the second discharge unit is solved.

The invention discloses a radar test rod for tunnel state detection, and belongs to the technical field of tunnel state detection. The test rod comprises a first sleeve, n levels of sleeves sleeved bythe first sleeve, a telescopic oil cylinder assembled in the sidewall of the n levels of sleeves and driving the n levels of sleeves to telescope, swing oil cylinders arranged in left and right sidewalls of the first sleeve symmetrically, an angle scale, a hydraulic control integrated block, a holder and a detection radar. The working efficiency and detection signal stability of tunnel state detection are improved, control is convenient, lifting is smooth, the reflection speed is high, the telescopic oil cylinder and swinging oil cylinders are controlled by hydraulic pressure, and motion is timely and rapid. The swing oil cylinders moves under the hydraulic effect and drives the test rod to swing left and right, the detection angle of the test rod can be adjusted timely, and the stabilityand accuracy of the detection signals are ensured.

The invention relates to the technical field of medical instruments, in particular to a nail bin assembly recognition device for an electric endoscope anastomat, the recognition device is arranged between a body and a nail bin assembly, the body is provided with a control mechanism for driving the nail bin assembly to act by controlling the recognition device, and tissue cutting and / or suturing are / is achieved. The distance that the nail bin assemblies with different cutting lengths and / or suturing lengths drive the recognition device to move is recognized through the recognition device, and the displacement range of the control mechanism is changed, so that the nail bin assemblies with different cutting lengths and / or suturing lengths are controlled, and the recognition device drives the nail bin assemblies to act together; the recognition device serves as a middle transmission part and has the function of transmission control of the action of the mechanism and the function of recognizing the nail bin assembly, existing electronic elements are replaced by improvement of a traditional structure, and the action of the recognition device is correspondingly and timely.

The invention discloses an axial moving adjusting system for a cylindrical welding part on a welding roller frame. The system comprises a pair of driving rollers, a first driven roller, a second driven roller and a cylindrical detection module; the detection module is coaxially mounted on the cylindrical welding part through a clamp, a first pressure sensor is arranged over the detection module, asecond pressure sensor is arranged under the detection module, a third pressure sensor is arranged on the right left of the detection module, and a fourth pressure sensor is arranged on the just right of the detection module. Through detection face transfer, the detection module with the simple shape and the small size only needs to be subjected to one-time finish machining, machining difficultyand cost are reduced, through malalignment of the roller axis and the welding part centre axis, changes of the output information of the four pressure sensors is caused, motion of the driven roller isadjusted in time, axial moving about to happening is effectively prevented, and the phenomenon that axial moving displacing exceeds the allowable range is avoided to a great degree.

The invention relates to the technical field of automobiles, in particular to a safety strategy system based on blind area monitoring. The system comprises a distance detection module, a speed detection module, a vehicle door locking module and a processing module, wherein the distance detection module is used for detecting the distance between a vehicle body and an obstacle in real time to obtain a distance parameter; the speed detection module is used for detecting the movement speed of the obstacle in real time to obtain a speed parameter; a preset duration is stored in the processing module; the processing module is used for calculating a motion distance parameter according to the preset duration and the speed parameter; the processing module is used for comparing the motion distance parameter with the distance parameter to obtain a comparison result; and the vehicle door locking module is used for locking a vehicle door when the comparison result is that the movement distance parameter is greater than the distance parameter. In the prior art, the accident that the vehicle door collides with other vehicles due to mistaken opening of the vehicle door is likely to happen. Compared with the prior art, the obstacles in the blind area can be effectively detected, so that the vehicle door is locked in time, and the safety is effectively improved.

The pesticide spraying machine comprises a rack, a height adjusting assembly, a pesticide storage box and a spraying assembly, the height adjusting assembly and the pesticide storage box are arranged on a first mounting part and a second mounting part of the rack respectively, and the height adjusting assembly comprises a driving component and a telescopic rod component; the power output end of the driving component is in transmission connection with one end of the telescopic rod component, the spraying assembly comprises a spray head and a connecting pipeline, one end of the connecting pipeline is connected and communicated with the pesticide storage box, the spray head is connected and communicated with the other end of the connecting pipeline, and the spray head is rotatably connected with the other end of the telescopic rod component. The spraying height can be conveniently adjusted through the height adjusting assembly, the spraying angle and effect are improved by arranging the rotatably-connected spraying head, the labor intensity is relieved, and meanwhile the problem that the pest control effect of pesticide is low due to the fact that the spraying machine cannot consider the position of a tree crown is well solved.

The present invention discloses a monazite and apatite paragenetic ore enrichment method. High-grade and high-recovery-rate monazite concentrate can be obtained by adopting the method through steps of ore grinding, floatation, magnetic separation and low-acid advanced leaching treatment and re-floatation. In this process, the applicable range of ore pulp temperature is wide, the process flow is short, the ore dressing conditions are mild, the energy consumption is small, the used diluted acid can be cyclically regenerated and used, the pollution is small, the environmental stress is small and the recovery rate of low-grade monazite and apatite paragenetic ores can be obviously improved.

The invention discloses an independent hydraulic wheel brake. The brake comprises clamp arms which are arranged symmetrically, a clamp base, brake shoes, a valve block, a spring hydraulic cylinder, ahydraulic pump and a hydraulic valve bank. The hydraulic pump is connected with the motor. A pressure cavity, a backpressure cavity, an oil inlet and an oil return port are formed in a spring hydraulic cylinder block. An oil way of the valve block communicates with the oil inlet and the oil return port in a butt-joint mode. A pressure end guide rod is arranged on one end surface of a piston and stretches out of one end of the cylinder block. A spring is arranged in the cylinder block, one end of the spring is fixedly connected with the end surface of the cylinder block, and the other end of the spring abuts against the end surface, where no pressure end guide rod is arranged, of the piston. One clamp arm is hinged to the pressure end guide rod, and the other clamp arm is hinged to the cylinder block. One end of the clamp base is hinged to one clamp arm, and the other end of the clamp base is hinged to the other clamp arm. The pair of brake shoes are hinged to the ends of the pair of clamp arms correspondingly. According to the independent hydraulic wheel brake, a highly integrated hydraulic driving mode is adopted, independent working is achieved, oil leakage is eliminated, and thesafety of main machine equipment is improved.

The invention discloses a buoy device, a method for controlling a buoy to fall in time, a water inlet valve and a drainage valve, the buoy device comprises a buoy seat, a one-way switch and a buoy located in the buoy seat, a drainage port is formed in the lower end of the buoy seat, the one-way switch is movably installed at the drainage port, and the drainage port is closed when the one-way switch floats in place; the one-way switch is provided with a water storage cavity, a water inlet structure communicated with the water storage cavity and an inner cavity of the buoy seat, and a drainage structure capable of draining water from the water storage cavity; after water enters the buoy seat, a part of water in the buoy seat enters the water storage cavity from the water inlet structure until the one-way switch opens the water outlet of the buoy seat. The buoy device enables the buoy to fall down in time along with the water level of a water tank, and ensures that a part linked with the buoy can act in time, so that the drain valve applying the buoy device can stop water in time, and the purpose of saving water is achieved.

The invention discloses a multi-angle adjustable ball serving method for sports equipment. The method is by comprising the following steps: (1) S1, a propelling cylinder moves forwards to a self-spinning station of a spinning adjusting module, and when the propelling cylinder moves backwards, a ball hitting rod compresses a force storage spring to realize energy storage; (2) S2, the two ends of aball located at the spinning station are tightly pressed by a rotating pressing rod of the spinning adjusting module, then the propelling cylinder slightly moves backwards to prevent the ball from making contact with the outer wall of the ball, and the rotating pressing rod drives the ball to achieve spinning; and (3) S3, blocking of the ball hitting rod is relieved, and then the ball with spinning is rapidly impacted by the ball hitting rod. Impact ball serving is achieved through a ball serving device, and ball spinning is achieved through the spinning adjusting module before impact, so thespinning balls can be sent out, the actual training requirement is met, and players can be trained to respond to strategies and actions of the spinning balls in time.