86results about How to "Achieve freedom of control" patented technology

The invention provides a liquid nitrogen and ice particle abrasive material jet method and a generating device of the liquid nitrogen and ice particle abrasive material jet method. According to the liquid nitrogen and ice particle abrasive material jet method, liquid nitrogen fluid is poured into the generating device from the top, atomized water drops are poured into the generating device at the position below the top of the generating device through an atomization spray nozzle at the same time, the atomized water drops make contact with the liquid nitrogen fluid to form ice particles, after the ice particles and the liquid nitrogen fluid are mixed in the generating device, the mixed ice particles and liquid nitrogen fluid are jetted and flow out from a bottom outlet of the generating device to form liquid nitrogen and ice particle jet flow, and the liquid nitrogen and ice particle jet flow conducts jet flow operation on a treatment object. The liquid nitrogen and ice particle abrasive material jet method and the generating device of the liquid nitrogen and ice particle abrasive material jet method can achieve free control over the concentration of abrasive materials and are high in operation efficiency, clean and free of pollution.

The invention discloses an air processing device control system based on a cloud platform and a control method of the air processing device control system. The control system comprises air monitoringdevices and air processing devices, wherein the air monitoring devices and the air processing devices are associated with the cloud platform through a network system; and the cloud platform is associated with terminal devices used for controlling the air processing devices to work through the network system. The control method is that the cloud platform controls the air processing devices according to interaction results of the cloud platform and the terminal devices. According to the air processing device control system based on the cloud platform and the control method, great convenience isbrought to a user, namely, the user can control the different air processing devices to work cooperatively at one place; the advantages of the cloud platform are fully utilized, the total production cost of the air processing device control system is greatly reduced, the cost performance of the air processing device control system is greatly improved, and the application and popularization of theair processing device control system are facilitated; the multi-user air processing device control system based on the cloud platform can be realized; and use safety of the system is greatly improved.

The mocro motor includes a system of pulsed light source and a rotation system. The system of pulsed light source possesses laser, electrooptic crystal, polarization disk. The electrooptic crystal is controlled by pulsed signal generation module and amplification loop. The rotation system possesses an expanding arm, friction plate, coaxial rotor, and a piece of compression spring. One end of the expanding arm is fixed, and the other end is pasted to the friction plate. One end of the piece of compression spring is fixed, and the other end is connected to a spring. The rotor is connected to the piece of compression spring, and the friction plate. Advantages are: small output step pitch, high speed, driven by laser directly, no read wire required, microminiature, possible to be placed in enclosure space (such as vacuum cavity), and remote controllable.

The invention discloses non-treatment frosted varnish ink for PET (polyethylene terephthalate) film gravure. The ink is characterized by comprising varnish, a diluent and a curing agent in the weight ratio being 10:(4-18):0.5, wherein the varnish comprises components in percentage by weight as follows: 25%-40% of a polyurethane resin liquid, 3%-7% of butyl acetate, 8%-12% of ethyl acetate, 8%-25% of an inorganic pigment, 1%-3% of PE wax powder, 2%-4% of a dispersing agent, 15%-20% of a modified material and 20%-35% of n-propyl acetate. With the adoption of the ink prepared with the formula, a common PET light film can be locally matted or completely matted through printing, and the beauty of a product is improved; the matt degree of the product is freely controlled to range from 2 degrees to 15 degrees through adjustment of the addition proportion of the diluent of the varnish ink and the depth of a printing plate; the matt effect is realized through the common PET film, the cost is low, and preparation is convenient.

A radio visual entrance guard device is prepared as setting master calling unit at entrance, connecting said master calling unit to a numbers of indoor fixed ends by cable, setting a numbers of radio hand ends in corresponding to indoor fixed ends one by one, enabling to carry out cable signal transmission between entrance master calling unit and indoor fixed ends and to carry out radio signal transmission between indoor fixed end and radio hand ends.

The invention relates to high-performance tungsten oxide nanometer powder as well as a preparation method and application thereof. The tungsten oxide nanometer powder is at least one of crystallization type tungsten oxide and amorphous state tungsten oxide; the structure formula of the tungsten oxide nanometer powder is WO3-x, wherein the x range meets the condition that the x is greater than or equal to 0 but is smaller than or equal to 1, preferably, x is greater than 0.1 but is smaller than 0.5. According to the high-performance tungsten oxide nanometer powder, the crystallization type tungsten oxide and the amorphous state tungsten oxide coexist; the interface enhancing effect is realized. The light regulation efficiency is effectively improved; the light regulating range is regulatedand controlled in a controllable way.

The invention discloses a shutter of an IPX4 protection grade. The shutter comprises an upper protection structure and a lower protection structure, and the upper protection structure and the lower protection structure are both of a curved surface structure, so that the splashing energy is attenuated, and water drops on a wall are guided to slide to the outside along the curved surface structures;the convex surface of the upper protection structure and the concave surface of the lower protection structure are in the same direction, and a free ventilation cavity is formed between the upper protection structure and the lower protection structure and is used for ventilation and heat dissipation. The shutter meets the requirements of the IPX4 protection grade, and meanwhile has good ventilation and heat dissipation functions, so that different heat dissipation requirements of products are met, and installation or connection of other parts is facilitated.

A baby shoe comprises a sole, an upper, a light-emitting device, a sound production device and a body weight measuring device. The light-emitting device comprises a diode, a power supply and a switch, the diode is arranged in the sole corresponding to toes, the tail end of the switch extends out of the sole, and the diode is respectively electrically connected with the power supply and the switch. The sound production device comprises an intelligent voice chip, the power supply and a switch, wherein the intelligent voice chip is arranged in the sole corresponding to a foot arch, the tail end of the switch extends out of the sole, and the intelligent voice chip is respectively electrically connected with the power supply and the switch. The body weight measuring device comprises the power supply, weighing sensors, a process control block and a display window, wherein the weighing sensors are respectively arranged at the bottom of the sole corresponding to a foot sole and a heel, the display window is arranged on the upper, the process control block is arranged in the middle of the sole, and the weighing sensors are respectively electrically connected with the power supply, the process control block and the display window. The light-emitting device, the sound production device and the body weight measuring device share the same power supply. The shoe can emit light, produce music and measure the body weight, and is rich in function, practical, convenient, compact in structure and light in weight.

The invention provides a virtual human animation synthesis method and system based on global emotion coding. The method comprises steps of converting an input voice feature into a phoneme posterior probability feature through employing a voice recognition model, obtaining a simulation noise sequence through employing a noise encoder, carrying out the summation of the simulation noise sequence and the phoneme posterior probability feature, obtaining phoneme posterior probability features with noise, and obtaining global content features through a full connection layer; extracting a Mel-frequency cepstrum coefficient feature sequence for emotional voice, extracting a global acoustic feature vector through a bidirectional gating loop unit network, setting an implicit vector matrix, and carrying out attention calculation on the global acoustic feature vector and the implicit vector to obtain a global emotional feature. The method is advantaged in that the global emotion features are spliced to the global content features, the context information is modeled through a bidirectional long-short-term memory network, face animation parameters corresponding to emotion and mouth shape information are generated, and finally virtual human animation with emotion is generated.

The invention discloses a multi-split wire for realizing data transmission of any path, and the circuit comprises a USB input interface which is used for receiving input data; at least two switch control circuits connected with the USB input interface; wherein the switch control circuit comprises a power switch circuit and a data switch circuit; at least two load detection and data reading units,wherein the load detection and data reading units are respectively connected with an output interface so as to complete the output of a detection result and data reading; and a main control module isconnected with each load detection and data reading unit and each switch control circuit. According to the invention, the power supply and data output by a certain branch of the wire rod can be closedor opened as required to realize control; meanwhile, a multi-port output current detection circuit is arranged, so that whether each path has data connection, removal, full charging and closing of acorresponding output port or not can be judged; the functionality allows multi-branch free data transmission and selection of whether to charge.

The invention discloses an LED lamp with a brightness control device. The LED lamp comprises a box body; a cavity is fixed in the box body; a right end wall of the cavity is fixed with a driving motor; an output shaft of the driving motor and a left end wall of the cavity are rotatably coupled; the outer surface of the output shaft of the driving motor is fixed with a fixed wheel; the left end ofthe fixed wheel is slidably provided with a large wheel; the large wheel is internally and fixedly provided with a large cavity opening to the left; and a right end wall of the large cavity is fixedlyprovided with a plurality of openings opening to the left in an annular array and a threaded cavity. The device of the invention has the advantages of simple structure and convenient use; the deviceuses the combined working to realize effective storage of the LED lamp and improves the equipment life; at the same time, automatic control of the brightness of the LED lamp is realized by an automatic method, the energy consumption is reduced, the working range of the device is increased, and the autonomy and reliability of the device are improved.

The invention relates to a novel high-pressure fuel oil system for an internal combustion engine, which is mainly characterized in that, a) high-pressure fuel oil in a pressure accumulator (3) is sent to a fuel oil distributor (8) in a timing and quantitative manner under the control of a high-pressure fuel oil on-off electromagnetic valve (7); b) the fuel oil distributor (8) is distributed after the high-pressure fuel oil on-off electromagnetic valve (7) and before a fuel oil injector (12); and c) an ECU (13) in the system can realize the control of fuel oil injection pressure and the fuel oil injection time, and the fuel oil injector (12) in the system adopts a traditional mechanical fuel oil injector. The high-pressure fuel oil system can realize the control of the fuel oil injection time and the fuel oil injection amount of each cylinder and lead each cylinder to realize multiple fuel oil injection in one working cycle by using the ECU (13) to control the high-pressure fuel oil on-off electromagnetic valve (7). The high-pressure fuel oil system can realize the free control of the fuel oil injection pressure and the fuel oil injection time, realize the multiple fuel oil injection in one working cycle, meet the requirements of the high emission standard of the internal combustion engine and further have the advantages of novel structure, simpleness, reliable working, convenient maintenance, low cost and the like.

The invention discloses an intelligent television video customizing method and an intelligent television video customizing system. The intelligent television video customizing method comprises the steps of A. receiving user video customizing requirement information by a middle layer, storing the information and transmitting the information to a cloud-end server; B. collecting corresponding video information by the cloud-end server according to the received information, and returning the video information to the middle layer; C. receiving the video information by the middle layer, performing kernel space mapping and cluster analysis on the video information by means of a multi-kernel particle swarm clustering algorithm for obtaining a clustering result which comprises a plurality of kinds of video information, comparing the clustering result with the video customizing requirement information, thereby obtaining a most matched kind of video information; and D. displaying the obtained kind of video information. The video data processing algorithm which is used by the intelligent television video customizing system can effectively process high-dimensional nonlinear big data and can remarkably improve clustering precision and reduces time complexity so that an intelligent television can supply individualized services in a targeted manner, so that the intelligent television is more intelligent and user-friendly.

The invention relates to a man-machine interaction device and a device and method for applying the man-machine interaction device to a virtual world. A sensing device is arranged on the man-machine interaction device and comprises an operation part and a distance sensor, wherein the operation part is used for receiving an operation action of a finger of a user, the distance sensor is used for sensing a distance between the operation part and a fixed position and generating a distance signal for representing the operation action. The invention also provides a virtual world auxiliary device which is used for applying the man-machine interaction device to the virtual world and comprises a receiving unit and a mapping unit, wherein the receiving unit is configured to receive a signal from the man-machine interaction device; the signal is based on the distance signal and is used for representing the operation action; and the mapping unit is configured to map the signal to the action of a local body part of an embodiment in the virtual world. The invention also provides a method corresponding to the virtual world auxiliary device. According to the invention, a multi-element signal of the operation can be sensed and the multi-element signal can be utilized to freely control the action of the embodiment.

The invention provides a remote control method, a household appliance, a remote control device and a storage medium. The remote control method comprises the following steps that first touch information of a touch area is identified to determine preset touch identification matched with first touch information; a control command corresponding to a preset touch identification is generated; and a control command is sent to the matched household appliance to control the household appliance to enter a functional mode corresponding to the control command, wherein the first touch information comprisesgraphic identification and / or a touch gesture formed by a touch motion trajectory. According to the technical scheme, a user can operate under the condition of closing eyes all the way, especially when the user is about to enter a sleep state, so that the influence of operating the remote control device on sleep is reduced.

The invention relates to the technical field of hot press equipment, and specifically discloses a hot press equipment for producing long-fiber high-strength fiberboards, including a machine base (1), a fuselage (2), a mechanical telescopic press plate (3), and a mechanical The pressure groove (4) matched with the telescopic pressure plate (3), the fuselage (2) is fixed above the base (1), and the mechanical telescopic pressure plate (3) is connected with the fuselage (2) through a hydraulic rod (5) , the press groove (4) is opened on the support (1), the described press groove (4) is rectangular, the groove depth of the press groove (4) is 5mm-10mm, and also includes an adhesive supply mechanism that cooperates with each other (6), and a feeding mechanism (7), the adhesive supply mechanism (6) is installed on the side of the pressure groove (4), and the feeding mechanism (7) is connected to the side of the pressure groove (4). The device can arrange coconut fiber raw materials in multiple directions, so that the mutual force is greatly enhanced, and the mechanical properties of the coconut fiber board are improved.

The invention provides a computer software teaching demonstration table fixing device for informatization. The computer software teaching demonstration table fixing device comprises a base; a two-waythreaded rod is rotationally connected into the front end of the lifting platform, the left end and the right end of the two-way threaded rod are in threaded connection with a left vertical plate anda right vertical plate, and the left vertical plate and the right vertical plate are rotationally connected with a left side plate and a right side plate correspondingly. A hand crank is rotatably connected to the middle of the rear side wall of the lifting platform, and the hand crank is in engaged connection with the transmission rod; a demonstration board is inserted between the left side boardand the right side board. A ratchet wheel bolt is slidably connected to the middle of the left side wall of the left vertical plate; the ratchet plug pin is pulled upwards to enable the top of the ratchet plug pin to compress the reset spring, and when the rotating cap at the top of the ratchet plug pin is higher than the ejector rod at the top of the protective shell, the rotating cap is rotatedto be in lap joint with the top of the ejector rod, so that the demonstration board can be rotated at will, and reset adjustment of the demonstration board is facilitated; and the demonstration boardcan be rapidly fixed to a needed overturning angle.

The invention relates to a counting cell for physical components, which comprises a bottom solid phase supporting plane (1), and three or more than three supporting components (2) for controlling counting depth are arranged on the bottom solid phase supporting plane. A manufacturing method thereof comprises the following steps: cleaning the supporting components; drying the supporting components; fully and evenly mixing high vacuum silicone ester and the supporting components according to a volume ratio of 2-15:1; and arranging the supporting components on the bottom solid phase supporting plane to form at least three supporting points. A using method comprises the following steps: adding samples (4) to be tested among the supporting components on the bottom solid phase supporting plane of the counting cell; covering the samples by a cover plate (3), and pressing the cover plate to the lowest position; and placing the counting cell below the microscope to count, wherein a computing formula comprises that: the density of the physical components is equal to average physical component number of each visual field divided by a product of the height of the supporting components multiplying the visual field area of the microscope. The counting cell has the advantages of low cost, simple manufacture, convenient use and long valid period, and can reduce threat of infectious samples to health by once use.

The invention discloses an energy storing type free linkage direct current charging system which comprises multiple charging piles. Each charging pile at least comprises a double-input charging module. Each double-input charging module is at least connected with one charging gun. The double-input charging module in each charging pile is connected with an alternating current power grid and an energy storing battery at the same time. A first fling-cut switch is connected between output ends of the double-input charging modules. A second fling-cut switch is connected between each double-input charging module and each charging gun connected with the double-input charging module in a corresponding manner. The charging system further comprises a general control unit. All the first fling-cut switches, all the second fling-cut switches and all the double-input charging modules are electrically connected with the general control unit. According to the system, all the fling-cut switches and allthe double-input charging modules are controlled in a linkage manner through the general control unit, output of charging power of all the charging piles are reasonably deployed, and the charging efficiency of the charging system is improved beneficially.

The invention relates to a circulating concrete material and component impact tester which comprises a base, the base is connected with a top plate through supports, the middle of the bottom plate isin bolted connection with a driving hammer rod, the lower end of the driving hammer rod is fixedly connected with a driving hammer, an embedded magnetic ring is arranged in the driving hammer, and falling distance limiting plates are symmetrically arranged on the supports on the two sides of the driving hammer. The lower portion of the driving hammer rod is in sliding connection with a loading weight disc, a magnetic induction counter is arranged on the loading weight disc, the upper portion of the driving hammer rod is in sliding connection with a lifting platform, the lifting platform is driven by a lead screw lifting mechanism, hook pressing devices used for hooking the loading weight disc are fixedly connected to the two sides of the lifting platform respectively, and travel switches are arranged on the hook pressing devices. The outer side of the pressing hook device slides along the falling distance limiting plate, and the top of the falling distance limiting plate is in bolted connection with a falling distance limiting block. The device is high in simulation degree of the concrete member and the test block under the impact load effect, easy and convenient to operate, good in practicability and wide in application range, and the test period is shortened.

The invention discloses an outdoor display screen cleaning vehicle. The outdoor display screen cleaning vehicle comprises a chassis, a lifting mechanism, cleaning mechanisms, a side telescoping mechanism, a dirty liquid recovery mechanism, a drying mechanism and a rear crawling ladder mechanism. The lifting mechanism and the side telescoping mechanism are installed on the chassis, and the two cleaning mechanisms are installed on the lifting mechanism and the side telescoping mechanism correspondingly. The outdoor display screen cleaning vehicle achieves the free control over the cleaning mechanisms by use of the lifting mechanism and the side telescoping mechanism, achieves cleaning of display screens at various positions and random heights, is low in influence on the road traffic and fulfills the function that one vehicle has multiple purposes. The cleaning mechanisms integrate the functions of dust blowing, wet cleaning, waste liquid recovery, panel drying and the like, the degree ofautomation is high, the cleaning effect is reliable, operation is easy, the influence on the display screens is low, the labor cost is saved, the labor intensity is reduced, and the working efficiency is greatly improved.

The invention provides a single-wavelength and dual-wavelength switchable semiconductor laser and a preparation method thereof, and the semiconductor laser comprises an epitaxial structure. The epitaxial structure is etched in the length direction to form a ridge waveguide, and the ridge waveguide is etched to form a semi-transparent and semi-reflective grating. A P-type electrode layer is prepared and formed at the position, away from the semi-transparent and semi-reflective grating, of the epitaxial structure, and the P-type electrode layer comprises a gain switch region electrode and a light amplification region electrode which are distributed on the two sides of the semi-transparent and semi-reflective grating; wherein the semi-transparent and semi-reflective grating, the light amplification region electrode and the front cavity surface form a first laser cavity for exciting laser with a first wavelength; and the gain switch region electrode, the part between the gain switch region electrode and the semi-transparent and semi-reflective grating, the semi-transparent and semi-reflective grating and the rear cavity surface form a second laser cavity for exciting laser with a second wavelength. According to the invention, free switching of single wavelength and dual wavelength can be realized, so that free control of one or two energy levels of pumping alkali metal atoms is realized.

The invention relates to a supporting leg hydraulic system. The supporting leg hydraulic system is used for controlling stretching and retracting of supporting legs, and comprises a main pump and a main valve connected with a main pump pipeline, and further comprises two or more hydraulic cylinders used for driving the supporting legs to extend and retract correspondingly, a rod cavity oil port and a rodless cavity oil port of each hydraulic cylinder are correspondingly connected into two working oil ports of the main valve in a one-to-one correspondence mode through pipelines, a switching valve capable of being independently controlled is connected into the pipeline between each hydraulic cylinder and the main valve, and each switching valve is controlled so that connection and disconnection of the rod cavity working oil way of the hydraulic cylinder corresponding to the switching valve can be correspondingly controlled. Through the system, free control of extension and retraction ofeach supporting leg can be realized, then the engineering machinery such as a wheel type excavator can be prevented from being limited by the road surface, and the adaptability is stronger. The invention further relates to engineering machinery comprising the supporting leg hydraulic system.

The invention discloses a method for efficiently generating free curves in 3D modeling. The method comprises: generating G1 continuous free curves according to two determined endpoints; generating G2continuous free curves according to two free curves in core business; generating open G2 continuous free curves; and generating closed G2 continuous free curves in the overall modeling of key structures. The invention can generate a modal of the free curves on the basis of the minimum computer resource occupancy rate, is low in resource occupancy rate, is fast in calculation speed, and is high inmodeling efficiency.

The invention discloses a die casting deburring device with a multi-angle rotating mechanism. The die casting deburring device comprises a reaction box, a rotating unit, a fixing unit and a surface treatment unit, the rotating unit is installed on the wall face of the reaction box, one end of the rotating unit is located outside the reaction box, the other end of the rotating unit extends into the reaction box, the ends, extending into the reaction box, of the fixing unit and the rotating unit are fixedly connected, the surface treatment unit is located on the inner side of the reaction box, and the surface treatment unit is fixedly connected with the inner side wall of the reaction box. According to the die casting deburring device, through cooperation of a burr treatment assembly and a flattening assembly, burrs on the surface of a workpiece are removed, the surface of the workpiece with the burrs removed is flattened, a hole detection block is designed for a blind hole in the surface of a die casting, and it is guaranteed that the inner surface of the blind hole can be treated.

The invention discloses a pressure sensor with a double-air-inlet-pipe structure, which belongs to the technical field of sensors and solves the problem that after an existing sensor is installed, only the pressure of one device can be detected, and the efficiency is low. The pressure sensor is technically characterized by comprising a shell; a cylindrical groove is formed in shell;a silicon ringis arranged at the bottom of the cylindrical groove; a silicon diaphragm is arranged at the bottom of the silicon ring; the interior of the shell is divided into a high-pressure cavity and a low-pressure cavity through thesilicon diaphragm; a left inlet is formed in the left side of the shell; a right inlet is formed in the top right side of the shell; the left inlet and the right inlet are both communicated with the cylindrical groove; and a regulator is arranged in the cylindrical groove. Through the left inlet and the right inlet,air flows through the cylindrical groove and is discharged from the outlet through the silicon diaphragm, the pressure is detected by utilizing the effect of the airon the silicon diaphragm, and opening and closing of the left inlet and the right inlet can be controlled by utilizing the regulator, so that the free control of the inlets of the pressure sensor is realized, the detection efficiency is improved, and the effects of free control and efficient detection are achieved.

The invention relates to a balance valve control system and a control method of an asymmetric turbocharger. The control system comprises a balance valve control valve, an engine control unit, a supercharger balance valve control diaphragm valve, a balance valve plate and a supercharger turbine. The control method comprises the steps that of 1, collecting actual supercharging pressure and EGR rateby the engine control unit; 2, comparing with target supercharging pressure and EGR rate, and determining whether adjustment is needed or not; 3, determining the target outlet air pressure of the balance valve control valve; 4, determining a duty ratio, and performing outlet air pressure adjustment; 5, enabling the actual outlet air pressure to be acted on a supercharger balance valve control diaphragm valve; 6, moving a valve element to change the opening degree of the valve plate of the balance valve, thereby causing the change of the output work and the pre-vortex pressure of the supercharger turbine; 7, changing the acting amount of the air compressor on air, and changing the supercharge pressure; and 8, changing the EGR rate of the engine. The control system and control method disclosed by the invention can reduce the pre-vortex pressure and the engine exhaust loss at medium and high rotating speed, and the economic performance and the environment-friendly performance of the engine are improved.

The invention relates to a space cleaning device with low power consumption. The space cleaning device comprises a shell with an opening at the top end, an air molecular density enhancer which sleevesthe side wall, close to the top end of the shell, of the shell, an electronic emitter arranged at the top end of the shell, and a pulse power supply and a free electronic energy regulator which are arranged in an inner cavity of the shell; the air molecular density enhancer is connected with a cathode of the pulse power supply; the electronic energy regulator is connected with an anode of the pulse power supply, and the electronic emitter is connected with the electronic energy regulator. According to the space cleaning device with low power consumption, based on a principle of electron collision and conduction, negative oxygen ions with the high concentration are formed through a method that a pulse power technology is adopted to produce the negative oxygen ion concentration difference,the content of the negative oxygen ions with small particle sizes in the air is increased, the small particle sized negative oxygen ions with the high concentration can be produced at low power, an air supplying device is not required, harmful substances such as ozone nitrogen oxides are not generated, radiation is avoided, the power of the space cleaning device is small, energy is saved, and thespace cleaning ability is greatly improved.

The invention relates to an overflow pipe and a slurry tank using the same. The overflow pipe comprises an overflow main pipe, rotary sealing joints, a control structure and a drainage pipe, and an overflow inlet pipe and an overflow outlet pipe are respectively arranged at two ends of the overflow pipe, and are respectively connected with the rotary sealing joints; the rotary sealing joint of the overflow inlet pipe is connected with the slurry tank, and the rotary sealing joint of the overflow outlet pipe is connected with the drainage pipe; and the control structure is arranged at an optional end of the overflow pipe, and controls rotation of the overflow main pipe according to the liquid level of slurry in the tank, so that the horizontal height of the top of the overflow main pipe isflush with the liquid level of the slurry in the tank. By the overflow pipe and the slurry tank using the same, potential safety hazards caused by manual operation are reduced while automatic production level and yield of compound fertilizers are increased.

The invention relates to a free electron energy regulator which comprises a vacuum metal cavity, an activated carbon cake, a free electron conduction wire and a free electron output wire. The activated carbon cake is arranged in the vacuum metal cavity and divides the same into a first collision chamber and a second collision chamber, a rotating copper target is arranged in the first collision chamber, a bur-shaped emitting cathode is mounted in an inner cavity of the rotating copper target and connected with one end of the free electron conduction wire, and the other end of the free electronconduction wire extends to the outside of the vacuum metal cavity; the second collision chamber is filled with a permanent dipole moment material, and one end of the free electron output wire is connected with the inner wall of the second collision chamber while the other end of the same connectedly extends to the outside of the vacuum metal cavity. By the free electron energy regulator, the objective of energy adjusting of free electrons can be achieved through physical collision and excitation to realize control of electron energy for the convenience of generating negative oxygen ions free of harmful substances like ozone and nitrogen oxide.