66results about How to "Spread far" patented technology

The invention discloses a vortex ring generation device based on radial disturbance principle. The vortex ring generation device based on the radial disturbance principle comprises an air feed device,a radial disturbance device, a ventilating duct and two opening and closing plates, wherein the air feed device, the radial disturbance device and the two opening and closing devices are sequentiallyarranged in the ventilating duct along the air flow direction, the two opening and closing plates are transversely and symmetrically arranged in the ventilating duct, semi-circular holes symmetrically arranged are formed in the two opening and closing plates, and the radial disturbance device is connected with the two opening and closing plates, and drives the two opening and closing plates to open or close. The vortex ring generation device based on the radial disturbance principle achieves continuous air feeding, generates a plurality of vortex rings on a section of continuous airstream, connects the vortex rings through common air, greatly improves ventilation rate, and can meet the requirement for the minimum ventilation rate in the heat supply or refrigeration field.

The invention discloses a solar powered bird repellent device which comprises an L-shaped supporting frame fixedly arranged on a cross arm, and a liquid storage barrel, a liquid separating barrel anda fan blade assembly which are fixedly arranged on the supporting frame. The device further comprises a solar panel arranged at the upper end of the liquid storage barrel, a storage battery pack connected with the solar panel, and a motor, a control device and an alarm device which are connected with the storage battery pack through wires. Compared with the prior art, a bird repellent agent is used for repelling birds, when no bird remains, the consumption of the bird repellent agent is low, and the function of warning birds not to stop can be achieved; when a bird remains, the designated birdrepellent operation is performed, and the propagation range is large; by arranging the liquid storage barrel and the liquid separating barrel, the liquid separating barrel can limit the consumption of the bird repellent agent; when the bird repellent agent of the liquid storage barrel is used up, some bird repellent agent still remains in the liquid separating barrel, a liquid level sensor at thebottom of the liquid storage barrel sends an instruction to the control device, the alarm device sends a signal to a worker so that the bird repellent agent can be added conveniently, and the deviceis convenient to install and suitable for being popularized.

The invention relates to the field of insect catching device, in particular to a novel trap. The trap comprises a canopy (2), a lure (3), a support frame (1), a tray (8), a tub of deinsectization (4) and a lifting poker (6). the lure of the trap utilizes a mutual combination way that connects the induced liquid and the trap lamp to attract insects, the main components of induced liquid are the host component of the insects, and both of them are Chinese drug compounds, the LED lamp utilizes a plurality of modulator tubes, and the tubes adopted as color which is divide into red, yellow and blue of three-primary colors, thus the different lights will be opened by different colors because the tubes are not in the same lamp shade. The purpose of effectively attracting the insects can be achieved by combining these two induction methods, at the same time, the surfactant solution and the medicine insecticide are utilized for deinsectization, thereby achieving the purpose of broad-spectrum insect, lure protection, safety and insects killing.

The invention relates to a high frame rate (HFR) ultrasonic imaging method based on a single power signal source and a switched network thereof, and the invention can realize the HFR ultrasonic transmission by using only one power signal source and a simple electronic switched network. Compared with the conventional ultrasonic imaging, the high frame rate ultrasonic imaging method uses only one channel of the power signal source and the simple electronic switched network to replace N power signal (source) amplification circuits, thus greatly simplifying the HFR system and reducing the power consumption of the circuit. The high frame rate ultrasonic imaging method approximately uses only a half of ultrasonic array elements for transmitting the signals, so the transmission energy of the device is reduced and the power supply to a future portable medical ultrasonic diagnostic imaging device by using a batter becomes possible. The high frame rate ultrasonic imaging method can be directly realized on a mature commercial machine, thus eliminating a delay circuit with expensive price. The HFR imaging algorithm is further utilized for carrying out the image reconstruction of the received signals and then the image with high quality is output.

The invention discloses a method for dynamically transmitting power line carrier wave information and a processing module thereof for realizing the high speed and real time transmission of information with high success rate and strong communication ability. The invention utilizes the technical scheme that an information data frame to be transmitted is compressed and split into a string of data packets, and the period for transmitting each data packet on the power line is less than the interference period of alternating current on the power line; and coding transmission is carried out on the data packets through the mode of repeated and multiple transmission. The decoding processing, such as error correction, unpacking, combination, and the like, is carried out on the data packet at the information receiving end in order to restore data. The invention is mainly used for low voltage power line communication, such as automatic meter reading, street lamp monitoring, environment (safety) monitoring, and the like.

The invention relates to the technical field of ant insecticides, in particular to an ant repelling agent and a preparing method thereof. The ant repelling agent is mainly prepared from 16-17 parts ofcamphor tree leaves, 15-17 parts of walnut leaves, 16-18 parts of tobacco leaves, 13-15 parts of basil, 14-16 parts of coleus blumei, 10-15 parts of rhoeo discolor, 11-12 parts of common lantana leaves, 10-13 parts of canna indica, 10-11 parts of bitter buttons, 9-10 parts of herb of Grace, 8-10 parts of mint, 6-8 parts of clove, 3-4 parts of cinnamon, 5-7 parts of black pepper, 5-7 parts of eggshell powder, 20-25 parts of organic solvent and the like. The agent has a remarkable ant repelling and killing function, the shelf life of the agent is prolonged, the use of chemicals is reduced, thesafety threats on the environment and human beings are reduced, the preparing method is simple, and production is easy.

The invention discloses a high-voltage line tower multifunctional bird repelling device which comprises a base plate, an annular support arranged on the base plate, a bird standing rod located on oneside of the annular support, an inner box body located in the annular support, a fan blade assembly, a bird repelling agent containing mechanism located in the inner box body and a driving motor. Compared with the prior art, besides conventional bird repelling work of bird repelling agents, fan blades and the like, the bird repelling device further has a dynamic bird repelling function and can repel retained birds, after the birds stay, the control module controls the driving motor to drive the inner box body to ascend, the connecting rods on the two sides of the inner box body are matched with the limiting groove of the annular support, and the ascending of the inner box body drives the supporting rods to move upwards, so that the bird repelling agent is separated out along second openingand first air outlet pipe; and meanwhile, rotation of the inner box body drives the fan blade assembly to deflect, the rotating blades are parallel to the bird standing rod after rotating by 90 degrees, and the rotating blades blow the bird repellent to the direction of birds, so that the bird is repelled, the spreading range of the bird repellent is wider, the bird repelling function is diversified, and the bird repelling box is suitable for popularization.

The invention provides a piezoelectric ceramic annular sensor for tubular concrete structure health monitoring, and belongs to the field of civil engineering structure health monitoring. The piezoelectric ceramic annular sensor comprises piezoelectric ceramic rings, waterproof and anti-electricity coatings, electromagnetic shielding coatings, cement mortar protection layers and wires. The piezoelectric ceramic annular sensor is used for transmitting signals to generate stress waves, the grouting quality of a tubular concrete structure can be monitored through the changes of energy of the received signals, the stripping condition between inner concrete and an overcladding layer can be monitored, and the use performance of the structure is judged. The piezoelectric ceramic annular sensor is suitable for tubular concrete structure construction process monitoring and health monitoring in the service process, the piezoelectric ceramic annular sensor is simple in structure, mass production is easy, the compatibility between the piezoelectric ceramic annular sensor and a concrete material is good, signal excitation and collection in the axial direction and the radial direction can be achieved, high applicability is achieved, and the sensor is provided for the construction process and service process of the tubular concrete structure in engineering.

The invention discloses an insect trap device capable of catching various insects. The insect trap device comprises a air draft tube, a second piston is installed in the air draft tube, a piston rod is installed on one side of the second piston, a first piston is installed on the lower portion, close to the second piston, of the piston rod, a pull plate is installed at one end of the piston rod, apull ring is installed on one side of the pull plate, a pipeline mounting tube is installed on the top of the air draft tube, a fixed frame is installed on one side of an odor diffuser, a wind collecting opening is formed in the side, close to the fixed frame, of the pipeline mounting tube, and an air delivery pipe is installed on one side of the wind collecting opening. Accordingly, four trap boxes installed on the same trap device are arranged, and the problem that various baits are placed in the same trap box, smells of the baits are mixed together, and the smells of the baits are changed,so that insect pest trapping is affected is avoided; by arranging the air draft tube, insect pests in the trap boxes are cleaned away uniformly conveniently, and convenience and rapidness are achieved.

The invention discloses a deep hole crack control blasting method for a grouting reinforced surrounding rock. The deep hole crack control blasting method comprises the following steps: (1) drilling holes on a rock body needing grouting, wherein the diameter of the drilled holes is 50-120mm, the depth of the drilled holes is 6-9m, and the distance between two drilled holes is 3-9m; (2) placing explosive containing tubes in the drilled holes, and filling stick explosive into the explosive containing tubes, wherein each explosive containing tube is formed by welding two arc-shaped plates in an overlapping mode, the decoupling coefficient of the stick explosive is 1.5-2.5, and the density of linear explosive is 1.1-1.7kg / l; and (3) performing presplitting blasting on the explosive in the drilled holes after explosion, and then filling grouting materials into cracks of the drilled holes. A plurality of cracks can be formed in a stratum, blast holes can be reserved and cannot collapse, grouting dispersing range is expanded, accordingly effective grouting curtains can be formed, the effect of grouting and water plugging can be achieved, and the surrounding rock can be reinforced.

The invention relates to the field of LED, in particular to a waterproof LED display screen. The waterproof LED display screen comprises a base, a supporting column, a fixed frame body, heat dissipation fans and a waterproof cover. Two sets of movable wheels are fixedly mounted on the bottom of the base, and two sets of the supporting columns are fixedly connected with the two sides of the top ofthe base and are fixedly mounted on the two sides of the top of the base through fixing sleeves; the fixed frame body is fixedly connected with the tops of the supporting columns, glass is arranged atthe base surface center of the fixed frame body, a sealing cushion is arranged between the glass and the fixed frame body, and guide grooves are formed in the surface of the glass; an LED display screen body is arranged on the inner side of the back face of the glass, loud speakers are arranged at the left and right end of the fixed frame body, radiator shells are arranged on the back face of thefixed frame body, heat dissipation grids are arranged on the surfaces of the radiator shells, and the heat dissipation fans are fixedly mounted on the portion, close to the inner sides of the heat dissipation grids, in the fixed frame body. The whole waterproof LED display screen is simple in structure and good in rain prevention effect and has certain popularization value.

The invention relates to a pulse frequency intensifier for an anion generating device, which comprises a rectangular shell, an inner end cap and an outer end cap, wherein a first electrode and a second electrode are arranged on two sides in the rectangular shell respectively, and natural mineral power is filled between the first electrode and the second electrode and generates a proper amount of impedance components and capacitance components under specific relative humidity condition to achieve the effect of a remote control (RC) effective oscillation circuit; and the inner end cap seals a cavity formed by the two electrodes and the natural mineral powder by sealing glue, and the outer end cap seals the rectangular shell by the sealing glue which is used for maintaining the relative humidity ratio in the rectangular shell. The pulse frequency intensifier for the anion generating device has the advantage that the pulse frequency can be intensified and stabilized, so that the corona discharge effect of the anion generating device can be intensified.

The invention provides a low-chirp distributed Bragg feedback tunable laser and a preparation method thereof. The low-chirp distributed Bragg feedback tunable laser comprises: a front grating region,a gain region, a phase region and a rear grating region which are arranged on a same substrate and sequentially attached at an equal height; each of the front grating region, the rear grating region and the phase region comprises a passive material layer; the passive material layers are arranged on the substrate; grating structures are further respectively arranged on the passive material layers of the front grating region and the rear grating region; the grating structures are uniform periodic distributed Bragg gratings and / or sampling gratings; and the gain region sequentially comprises a lower waveguide layer , an active layer and an upper waveguide layer from bottom to top. The low-chirp distributed Bragg feedback tunable laser has the beneficial effects that by combining with the uniform periodic distributed Bragg grating structures of the front grating region and the rear grating region with the current function of the phase region, the chirp of the tunable laser is controlled and reduced, the optical transmission distance is extended and the transmission quality is improved.

The invention provides an epitaxial growth method of a light-emitting diode (LED) structure including a potential barrier with gradually-varied thickness. The light-emitting layer multiple quantum well (MQW) growing step is that H2 and / or N2 serve / serves as carrier gas, an In-doped InxGa(1-x)N layer with the 2.5-3nm thickness grows in a reaction chamber with the 730-750 DEG C temperature and the 100-800mbar pressure, wherein x=0.20-0.21; the temperature of the reaction chamber is adjusted to be 800-840 DEG C, trimethyl gallium is led into the reaction chamber for a time period R, and a first GaN layer with the thickness D grows; an InGaN layer grows repeatedly, trimethyl gallium is led into the reaction chamber for 0.75-0.95 time of a time period R, and a second GaN layer with the 0.75-0.95 times of thickness D grows; by the analogy, the thickness of the GaN layers is gradually decreased layer by layer. The GaN thickness of a light-emitting layer is changed and gradually decreased, accordingly distribution of electrons and electron holes is improved, and the LED lighting effect is improved.

The invention discloses an axial pulse vortex ring generation device based on positive and negative pressure alternating closed chamber deformation. The axial pulse vortex ring generation device comprises a fixed rack, a ventilation device, a disturbance device and a power device, wherein the ventilation device, the disturbance device and the power device are fixedly arranged on the fixed rack, and the power device is connected with an elastic film in the ventilation device through the disturbance device; and the power device comprises a strain gauge, a positive-negative pressure generation chamber and a cold-hot alternating mechanism, the strain gauge is arranged at one end of the positive-negative pressure generation chamber and connected with the input end of the disturbance device, andthe other end of the positive-negative pressure generation chamber is open and provided with the cold-hot alternating mechanism. According to the axial pulse vortex ring generation device based on positive and negative pressure alternating closed chamber deformation, heat change can be converted into mechanical displacement, airflow in a ventilation pipeline is accelerated, axial pulse disturbance is generated, and then a vortex ring is generated.

The invention discloses a Zhuang drum. The Zhuang drum comprises a drum body, drum skin and a vibrating piece, wherein the drum body is of a cylindrical structure, the inner portion of the drum body is provided with a drum cavity; the drum skin is arranged at the two ends of the drum body; the vibrating piece is arranged in the drum cavity, the vibrating piece comprises springs and elastic stripswhich are located a central disc of the drum cavity and spread outward from the disc, the first ends of the springs are connected with the disc, the second ends of the springs are connected with the inner wall of the drum cavity to pull the disc, the first ends of the elastic strips are connected with the disc, and the second ends of the elastic strips extend to the outside of the inner wall of the drum cavity and is not in contact with the inner wall of the drum cavity. The Zhuang drum has the advantages that the vibrating piece comprises the spring, the disc and the elastic strips, the firstends of the springs are fixed at the inner all of the drum cavity, the second ends of the springs are connected with the disc, and the elastic strips are fixed on the disc, so that vibration with larger amplitude can be generated during knocking, the sound generated by vibration is thicker, the sound is louder, and spreading is wider.

The invention relates to the technical field of camping equipment, in particular to an insect trapping device used for camping. The technical problem to be solved by the invention is that small wingedinsects can influence people's sleep due to the fact that no appropriate equipment is used for attracting insects during camping. In order to solve the technical problem, the invention provides an insect trapping device for camping. The insect trapping device comprises an upper ball body; the bottom of the upper ball body is in threaded connection with a lower ball body, a photovoltaic solar panel is fixedly connected to the surface of the upper ball body, and a circular ring sleeve is welded to the movable opening of the top of the upper ball body, and the bottom of the circular ring sleeveis movably connected in a movable opening in the bottom of the lower ball body in a sleeved mode. The sliding insect trapping device can be conveniently arranged inside the circular ring sleeve, and the circular ring sleeve is positioned inside the upper ball body and the lower ball body, so that the sliding insect trapping device can be stored and protected. The sliding insect trapping is thus more convenient to carry, and the energy consumed by people in the process of carrying the insect trapping device is reduced.

The invention belongs to the field of defect detecting of additive manufacturing, and in particular discloses an electromagnetic ultrasonic detection system and method. The electromagnetic ultrasonic detection system comprises a control sub-system, a transmitting sub-system, a receiving sub-system and a data processing sub-system; the control sub-system comprises an upper computer and a main control module realizing communication; the transmitting sub-system comprises a high power pulse generation module and a pulse source transmitting probe, which are arranged in sequence; when detection is carried out, the upper computer transmits an external detection instruction into the main control module; the main control module controls the high power pulse generation module to generate a pulse string synthesized by multiplex Marx circuit attenuation pulse according to the detection instruction; the pulse string is received by the pulse source transmitting probe, and transmitted to a test piece to be detected; therefore, electromagnetic ultrasonic wave is generated in the test piece to be detected; and the electromagnetic ultrasonic wave is received by the receiving sub-system, sent into the data processing sub-system, and then, transmitted to the upper computer through the main control module. The electromagnetic ultrasonic detection system and method disclosed by the invention can realize non-contact type detection of a work piece in an additive manufacturing process, and have the advantages of being high in detection precision, diversified in detection frequency, large in detection depth and the like.

The invention relates to an audio-visual count-down traffic light which is mainly composed of a traffic light body, a timing circuit module and gradient indicating lamps, wherein a red light, a yellow light and a green light are arranged on the traffic light body. The audio-visual count-down traffic light is characterized in that the red light, the yellow light and the green light on the traffic light body are arranged in a triangle shape, and the triangle is bigger. A large amount of gradient indicating lamps which are arranged in a linear shape are arranged on the edges of the triangle which is formed by the red light, the yellow light and the green light. The gradient indicating lamps form a gradient indicating lamp group, and the gradient indicating lamp group, the red light, the yellow light and the green light are connected with the timing circuit module. The timing circuit module controls the lightening conditions of the gradient indicating lamp group, the red light, the yellow light and the green light.

The invention discloses a miniature soundbox with a telescopic resonance chamber. The miniature soundbox comprises a loudspeaker, a soundbox upper casing, a soundbox middle casing, a soundbox lower casing, an audio cable, an audio plug, a circuit board, a speaker mesh and the telescopic resonance chamber, wherein the speaker mesh is circular and is connected with the soundbox upper casing, and holes in the speaker mesh are increased gradually from the inside to outside. According to the invention, since the holes in the speaker mesh are increased gradually from the inside to outside, the effects of preventing sundries from damaging a loudspeaker resonance film and protecting the soundbox can be realized, and the sound broadcasting effect is enabled to be better and the sound is broadcast further; in addition, the miniature soundbox is enabled to be more attractive in appearance and an efficacy of protecting the inside loudspeaker is realized; moreover, the noise produced by incompatible resonance can be eliminated, and the sound distortion is restrained to a certain degree.

The invention discloses a large-sized drum which comprises a drum body, drum skins, vibration parts and a frame, wherein the drum body is formed by the surrounding of plate blocks; a drum cavity is formed inside the drum body; the plate blocks include girder plate blocks and auxiliary plate blocks; the girder plate blocks protrude out of the inner wall of the drum cavity to form projections, the projections are covered with metal layers, metal nails are arranged on the projections, and the metal nails penetrate the drum body from the projections; opening parts are arranged on the drum skins; the opening parts are sleeved and fixed with both ends of the drum body; each vibration part comprises a disk, springs and elastic sheets; the frame comprises a horizontal supporting plate and a supporting frame arranged on the supporting plate; a first end of the supporting frame is hinged with the supporting plate; an electric telescopic rod is arranged between the supporting frame and the supporting plate; one end of the electric telescopic rod is fixed on the supporting plate, and the other end of the electric telescopic rod is connected with a second end of the supporting frame; the electric telescopic rod extends and retracts to increase and reduce a height of the second end of the supporting frame; a downward depression is formed in the middle part of the supporting frame; a buffer layer is arranged in the depression; and universal wheels are arranged below the supporting plate.

The invention discloses a wall-mounted air conditioner internal unit enclosure. The wall-mounted air conditioner internal unit enclosure comprises air inlets (1) and air outlets (2), and is characterized in that the air inlets (1) are formed in the lower portion of the enclosure; the air outlets (2) are formed in the upper portion of the front side of the enclosure; multiple round sealing ports serve as the air outlets (2); rotary air outlet mechanisms (3) are arranged in the air outlets (2); and active rotation mechanisms serve as the rotary air outlet mechanisms (3). The air outlets are formed in the upper portion of the front side of the wall-mounted air conditioner internal unit enclosure, compared with air outlets formed in the lower portion, the spread distance of cold air is long, the hang time is long, longer heat exchange time can be achieved, indoor air exchange is more uniform, the temperature of air scattered on human bodies is more proper, and the cold air is prevented from facing persons directly.

The invention belongs to the technical field of bird repelling equipment, and discloses a sound amplifying tube for generating valley echo effect of repelling bird impact waves and a control method. The sound amplifying tube comprises a blasting chamber, wherein a blasting gas inlet is formed in the right end of a blasting chamber, a blasting gas inlet joint is welded in the blasting gas inlet, acenter shaft is welded at the left end of the blasting gas inlet joint; and a cross-shaped fixing support is welded to the left end of the center shaft and fixed to the left end of the inner side of the blasting chamber in a welded mode; and a plurality of equidistantly arranged triangular airflow diversion frames are welded in the middle of the central shaft, and the plurality of triangular airflow diversion frames have the same angle difference in sequence from left to right. The sound amplifying tube is prevented from being influenced by the external environment, good explosion sounds can be generated, the explosion sounds are louder than that of a traditional gas gun, the energy is greater, a spiral structure is formed by the plurality of triangular airflow diversion frames, three strands of impact waves with the spiral rotating direction are formed through dredging of the triangular airflow dredging frames, and the sounds are transmitted farther and have the feature of valley echoeffect.

The invention provides a multichannel wavelength division multiplexer which comprises first collimators, second collimators and a refraction layer. The refraction layer is arranged between the first collimators and the second collimators; the refraction layer further comprises a left refraction layer and a right refraction layer; first film filters and second film filters are arranged in the rightrefraction layer; and first film filters and a high-reflectivity mirror are arranged in the left refraction layer. According to the multichannel wavelength division multiplexer in the above the structure, signal light beams reflected by the first or second film filters are shaped by arranging the high-reflectivity mirror, so that the signal light beams are clustered again and can be spread further; and therefore, the size of a light spot can be completely received by the subsequent collimators, and the purposes of low loss and long working distance are achieved.

The invention relates to the technical field of loudspeaker equipment and discloses an alto compression drive device with double magnetic circuits. The device comprises an upper cover, a central column, a first magnetic circuit, a first vibration plate, a first equalizer and a base which are set in sequence from top to bottom. The device also comprises a second equalizer, a second vibration plateand a second magnetic circuit which are set in sequence from top to bottom. The second equalizer, the second vibration plate and the second magnetic circuit are set between the first equalizer and thebase. In order to solve the problem that in the prior art, heat dissipation is slow, a space utilization rate is low, voice quality improvement is limited and voice representation capacity is low, according to the scheme, the first equalizer and the second equalizer are sleeved together through utilization of the central column and voices are converged to the central column from double channels formed by the first equalizer and the second equalizer, so voice quality of the whole drive device is improved, a whole structure is relatively compact, and space is utilized well; and through settingof the first magnetic circuit, the second magnetic circuit, the first vibration plate and the second vibration plate, heat dissipation speed of the whole drive device is accelerated.

The invention belongs to the field of additive manufacturing defect detection, and specifically discloses an electromagnetic ultrasonic detection system and a detection method, which include a control subsystem, a transmitting subsystem, a receiving subsystem and a data processing subsystem, and the control subsystem includes a communication The host computer and the main control module, the transmitting subsystem includes the high-power pulse generation module and the pulse source transmitting probe set in sequence; during the detection, the host computer transmits the external detection command to the main control module, and the main control module controls the high-power pulse according to the detection command. The power pulse generation module generates a pulse train synthesized by multi-channel Marx circuit attenuated pulses. The pulse train is received by the pulse source transmitter probe and transmitted to the DUT to generate electromagnetic ultrasonic waves inside the DUT, and the electromagnetic ultrasonic waves are received by the receiving subsystem. And sent into the data processing subsystem, and then transmitted back to the host computer through the main control module. The invention can realize the non-contact detection of workpieces in the process of additive manufacturing, and has the advantages of high detection accuracy, various detection frequencies, large detection depth and the like.

The invention relates to a manufacturing method of a high-voltage net for an insecticidal lamp. The manufacturing method includes the following steps that firstly, a quartz glass tube serves as a high-voltage net carrier, and a high-voltage grid circuit diagram is designed on the outer surface of the quartz glass tube; secondly, conductive slurry silver is printed to the outer surface of the quartz glass tube at a time through a curved surface screen printing machine according to the designed high-voltage grid circuit diagram; thirdly, the quartz glass tube is placed in a sintering furnace to be sintered and fused; fourthly, the surface of a circuit coating with the sintered silver is electroplated with anti-corrosion metal; fifthly, welding and forming are conducted. The high-voltage net is free of gaps and has the smooth outer surface, and killed insects cannot adhere to the portion between high-voltage grids and can automatically fall to be collected. The higher light transmittance is achieved, and the pest killing effect is improved. Product accuracy is consistent, and performance is stable; energy consumption is low, and service life is long and is 2 to 3 times that of an ordinary high-voltage net.

The invention provides a grain throwing device. The grain throwing device comprises a bottom plate and a guide component arranged on the bottom plate and used for guiding grains, wherein the guide component comprises a guide plate; the guide plate comprises an arc-shaped section and a straight section; an extension direction of the straight section is a tangential direction of the tail end of thearc-shaped section. The device is capable of uniformly throwing the grains and uniformly scattering the grains into a drying chamber, so that the problem that the grains are unevenly piled in the drying chamber can be effectively solved; the effective utilization rate of the space of the drying chamber and the grain drying efficiency are improved; the grains can be uniformly heated and are uniformin water content in the drying process; in addition, the invention also provides a grain drying machine comprising the grain throwing device; the grain drying machine is capable of uniformly drying the grains; the space utilization rate of the drying chamber is high; the drying quantity in unit time is high; the grains can be uniformly heated in the drying process; the water content of the grainstreated by the drying machine is uniform.