475results about How to "Increase vibration amplitude" patented technology

The invention discloses an efficient wideband vibrating energy collector with an elastic amplifying mechanism and belongs to the technical field of new energy and power generation. The vibrating energy collector comprises a shell, the elastic amplifying mechanism, a cantilever beam piezoelectric vibrator and a spring-mass system, wherein the shell is formed in such a way that 4 lightweight metal plates are fixed between an upper end cover and a lower end cover through bolts to form a tetrahedron; U-shaped connecting seats for fixing the cantilever beam piezoelectric vibrator are arranged on the lightweight metal plates; the elastic amplifying mechanism comprises a spring element and a damping element; the elastic amplifying mechanism is fixed between a base and the shell through a bolt; the cantilever beam piezoelectric vibrator comprises an upper piezoelectric ceramic chip, a lower piezoelectric ceramic chip, a metal substrate and a magnet; the upper piezoelectric ceramic chip is bonded at the top of the metal substrate and the lower piezoelectric ceramic chip is bonded at the bottom of the metal substrate; one end of the metal substrate is fixed on the U-shaped connecting seat through a bolt; the magnet is mounted at the other end of the metal substrate; the spring-mass system comprises a tension spring, a pressure spring and mass block; one end of the tension spring is connected with the bottom surface of the upper end cover; one end of the pressure spring is connected with the top surface of the lower end cover; the other ends of the tension spring and the pressure spring are respectively connected with the mass block; the magnet is embedded on the periphery of the mass block; and reverse magnetic poles of the magnet at the end part of the piezoelectric vibrator and the magnet embedded on the periphery of the mass block are oppositely mounted. The efficient wideband vibrating energy collector with the elastic amplifying mechanism, disclosed by the invention, has the advantages that the amplitude of weak vibrating displacement of the base can be amplified, the power generating energy and conversion efficiency of the piezoelectric vibrator are increased and efficient wideband energy collection and conversion can be achieved.

The invention discloses a spatial multimode arrayed cantilever beam piezoelectric energy collecting device, which comprises a base skeleton, a cantilever beam array, magnets and piezoelectric power generation pieces, wherein the base skeleton is composed of metal tubes distributed in a spatial coordinate mode; the cantilever beam array is composed of multiple cantilever beams which are arranged sequentially from short to long; each metal tube of the base skeleton is provided with a group of cantilever beam array; the cantilever beam array is vertical to the metal tube; the mounting direction of the cantilever beam array needs to ensure the vibration direction to be parallel with the length direction of the metal tube; the tail end of each cantilever beam in the cantilever beam array is provided with the magnet; the same magnetic poles of the magnets between adjacent cantilever beams are opposite; and the piezoelectric power generation piece is adhesive to the root of each cantilever beam. The working frequency domain of the structure is wide, the structure is compact, the space utilization rate is high, the power generation efficiency is high, and the energy utilization efficiency can be improved and self power supply of a low power consumption device can be realized through collection of external vibration energy.

A micro electric field transducer of static comb excitation differential detection type is prepared as setting positive induction electrode and negative induction electrode under shielding electrode or in the same plane of earthing shielding electrode, carrying out reciprocal and periodical vibration in said plane by shielding electrode under excitation of static comb to periodically shield and expose positive or negative induction electrode in order to let positive or negative induction electrode generate alternative induction current for realizing detection of external electric field.

The invention discloses a mini-type electromagnetism low frequency energy collector in the field of electronic component which comprises a libration pick up structure, a support structure and a micro-coil structure. The libration pick up structure comprises a metal plane spring and a permanent magnet. The metal plane spring comprises four square spirality elastic arms and a metal platform. The permanent magnet is arranged at the metal platform. The micro-coil comprises a micro-coil winding and an insulated underlay. The metal plane spring and the support structure are integrated as a whole. The libration pick up structure and the support structure are at the micro-coil. The libration pick up structure of the utility model has a natural frequency near to 100 HZ and is easy to satisfy the integrated requirements such as improvement of the low frequency energy collecting efficiency, low production cost and integrated production.

The invention provides a force amplitude adjustable type vibration absorber actuating mechanism which is based on a double-slider mechanism. One end of two parallel rotating shafts is respectively provided with mutually meshed straight spur gears, a connection shaft of a three phase asynchronous motor drives the straight spur gear of a driving parallel rotating shaft, right ends of the two rotating shafts are connected with sliding-block linkages with the same structure, the sliding-block linkage includes a connecting rod, adjusting sliders and an eccentric mass slider; the adjusting slider is connected with the parallel rotating shaft, the eccentric mass slider is sheathed on a slide bar which is vertical to the parallel rotating shaft, two adjusting sliders are connected by a deflector rod which is connected with a regulating mechanism, a driven parallel rotating shaft is connected with a first straight tooth bevel gear which is meshed with a second straight tooth bevel gear on a worm, a turbine, which is meshed with the worm, is arranged above the worm, the center of the turbine is connected with a first drive bolt, and the actuating mechanism further includes a second drive bolt. The actuating mechanism can be used for reducing mechanical vibration caused by unbalanced force and torque to improve mechanical vibration amplitude.

The invention discloses a vibration pick-up structure on the basis of a flexible main beam for a vibration energy harvester. The vibration pick-up structure comprises the flexible main beam, a plurality of piezoelectric cantilever beams and mass blocks. The flexible main beam is of a rectangular frame structure, and a rectangular hole is formed in the middle of the flexible main beam; one end of each cantilever beam is fixedly adhered on the upper surface of the flexible main beam, the other end of each piezoelectric cantilever bream is suspended above the rectangular hole, and each mass block is adhered at the suspended end of the corresponding piezoelectric cantilever beam; the multiple piezoelectric cantilever beams are respectively arranged on two sides of the rectangular holes to form forking fingers and are parallel and equidistant to short sides of the rectangular hole. By the aid of the forking finger type multi-cantilever-beam vibration pick-up structure on the basis of the flexible main beam in the design, high-order vibration pick-up frequencies and of a system can be greatly reduced, low-order vibration pick-up frequencies of the system can be reduced, and accordingly a vibration energy harvesting frequency band of the system can be effectively broadened. Compared with the traditional vibration pick-up structure of a vibration energy harvester, the vibration pick-up structure has the advantages that broadband vibration energy can be harvested in ultra-low frequency ranges of frequencies lower than 100Hz, output voltage can be increased, and accordingly the energy harvesting efficiency can be improved.

The invention discloses a vibration film component, and relates to the technical field of electro acoustical products. The vibration film component comprises a vibration film, wherein the vibration film comprises a middle portion and a fold ring portion which wraps around the periphery of the middle portion. The vibration film furthermore comprises a vibration film base layer and a silica gel layer, wherein the silica gel layer is integrated in the vibration film base layer at least partially, the vibration film base layer is a polymer material layer, the silica gel layer is integrated in the surface of the fold ring portion, and the silica gel layer and the polymer material layer are injection molded. The vibrating film component achieves recombination of the silica gel layer and the polymer material layer by arranging the silica gel layer in the surface of the fold ring portion, and thereby improves compliance of the vibration film, enhances chemical stability and adaptability to temperature of the vibration film, optimizes acoustic performances, and improves products yield rate.

Provided is a GMR-MEMS integrated weak magnetic sensor adopting a plane micro-coil. The base of a micropressure bridge comprises a first base and a second base, the base is fixedly arranged on a spacer, the spacer is fixedly arranged on an insulating substrate, and a bridge body is connected between the first base and the second base. A piezoelectric patch is arranged on the bridge body and between the first base and the second base. A GMR sensitive element is arranged below the bridge body and is symmetrically arranged, magnetic force line collector in the GMR sensitive element comprises a first magnetic force line collector and a second magnetic force line collector, clearance is reserved between the first magnetic force line collector and the second magnetic force line collector, GMR resistors comprises a first GMR resistor, a second GMR resistor, a third GMR resistor and a fourth GMR resistor, the first GMR resistor, the second GMR resistor, the third GMR resistor and the fourth GMR resistor form a Wheatstone bridge, the first GMR resistor is located in the first magnetic force line collector, the second GMR resistor is located in the second magnetic force line collector, and the third GMR resistor and the fourth GMR resistor are located in the clearance. A modulation film is connected on a position, opposite to the modulation film, on the bridge body. The GMR-MEMS integrated weak magnetic sensor adopting the plane micro-coil has the advantages of being simple in structure, low in noise, low in cost, low in hysteresis and the like.

A multi-directional sand and gravel grading equipment for building construction, comprising a shell, two bases are symmetrically and fixedly connected to the upper side of the shell, the base is provided with an up and down reciprocating device, and the tops of the two up and down reciprocating devices are jointly fixedly connected with a A left and right reciprocating device, the left and right reciprocating device includes two rotating rods, one end of one of which is connected to the output shaft of the motor, and a rotating body is fixedly connected between the two rotating rods, and the rotating body is horizontally cylindrical. A spiral groove is provided on the side wall of the rotating body, and the spiral groove is arranged around the rotating body; a first connecting column is arranged in the spiral groove, and the diameter of the first connecting column is equal to the width of the spiral groove, and the outside of the first connecting column An installation sleeve is fixedly connected, the lower end of the installation sleeve is fixedly connected with a swing rod, and the lower end of the swing rod is fixedly connected with a sector gear. The invention realizes the back and forth movement of the sieve net, and the vibration amplitude is relatively large, thereby realizing a better screening effect.

The invention discloses a telephone receiver provided with an improved structure. The telephone receiver comprises a shielding shell, a moving iron unit, a conduction rod, an armature and a vibrating film, wherein the moving iron unit, the conduction rod, the armature and the vibrating film are arranged in the shielding shell. The two ends of the conduction rod are connected with the armature and the vibrating film respectively, the moving iron unit drives the armature to vibrate up and down and accordingly the conduction rod is driven to drive the vibrating film to vibrate up and down; the shielding shell comprises a shell cover and a shell body in the vibration direction of the vibrating film, and the edge of the front side and the edge of the back side of the vibrating film are connected with the shell cover and the outer wall of the shell body respectively. The telephone receiver provided with the improved structure is simple in manufacturing technology, reduces production cost, and is large in sound loudness.

The invention discloses a drum type easily cleaned concrete stirring device. The drum type easily cleaned concrete stirring device comprises a base and a working table, wherein a left support and a right support are separately fixedly arranged on the left side and the right side of the top of the working table; a drum is arranged between the left support and the right support; a left baffle and aright baffle are separately fixedly arranged on the left side and the right side of the inside of the drum; a plurality of material passing openings which are attached to the inner wall of the drum are uniformly formed in the right baffle in the peripheral direction; a second rotating shaft is arranged at the axis position of the drum; a gear motor is fixedly arranged on the left end surface of the left support; a motor shaft at the right end of the gear motor is fixedly connected with the left end of the second rotating shaft; the second rotating shaft is driven to rotate through the gear motor; and spiral blades are fixedly mounted on the second rotating shaft and positioned between the left baffle and the right baffle. Concrete is stirred by rotation of the spiral blades, and is drivento move from left to right during stirring; and because the drum is inclined towards the left lower direction, the concrete drops towards a left lower corner under the effect of gravity, the concreteis stirred in a reciprocating manner in this way, and the mixing effect is good.

The invention relates to a method for measuring steel rail appearance geometric dimension and surface quality and a device thereof. Three sets of laser devices, a total of eight two-dimensional laser sensors, are adopted to acquire steel rail cross section contour data, data fusion is performed by computer software, all cross sections are spliced and the three-dimensional contour of a steel rail is acquired. Each cross section contour of the steel rail is automatically analyzed, the appearance geometric dimension of the steel rail is detected, steel rail surface quality is detected and detection results are uploaded to a welded rail production and management system so that automatic rail distribution and steel rail information recording can be realized. The detection results are displayed in real time, and three-dimensional contour pictures of surface quality with defects are recorded. The detection results are displayed in real time, and real-time sound-light alarm is performed when the detection results exceed standard values. The steel rail appearance geometric dimension and surface quality can be effectively detected by the method so that utilization rate of the steel rail can be greatly enhanced and safety hidden trouble in subsequent use can be reduced.

A gravel screening device for building operations comprises a screening shell. A conveying pipe is vertically arranged on the left side of the screening shell. A lifting rotary shaft is arranged in the conveying pipe. The top end of the lifting rotary shaft is connected with a first motor located above the conveying pipe. The lifting rotary shaft is provided with a screw blade. A discharging opening in the top end of the conveying pipe communicates with a feeding channel in the upper portion of the screening shell through a discharge pipe. A primary filter screen and a secondary filter screen are sequentially arranged in the screening shell from top to bottom, and the edge of the primary filter screen and the edge of the secondary filter screen are both connected with a coarse material box located outside the screening shell through receiving pipes. A vertical stirring rotary shaft is arranged in the screening shell. The gravel screening device has the beneficial effects that the structure is simple, design is reasonable, and the running cost of the gravel screening device is low; and gravel is lifted up through the screw blade and does not need to be fed from the upper portion of the screening shell, so that the labor intensity is lowered, and adding is convenient and rapid.

The invention discloses a telephone receiver. The telephone receiver comprises a shell with a hollow cavity; a first sound producing membrane arranged on the shell and used for diving the hollow cavity into a first cavity and a second cavity; a main vibration component arranged in the second cavity and used for dividing the second cavity into a main sound producing cavity and a mounting cavity, wherein a first sound hole and a second sound hole are respectively formed on the shell to correspond to the wall surface of each of the main sound producing cavity and the first cavity; and a driving mechanism arranged in the second cavity; the driving mechanism drives the main vibration component to vibrate, the vibration drives the first sound producing membrane to vibrate through the air in themain sound producing cavity; the sound produced by each of the main vibration component and the first sound vibrating membrane is converged; the vibration of the first sound producing membrane maintains a certain lagging in comparison with the main vibration component, so that the sound produced by the first sound producing membrane and the sound produced by the main vibration component can produce the reverberation effect, thereby perfecting the low-frequency feature of the telephone receiver, and improving the fullness and depth of the sound.

A therapeutic ultrasound delivery system, comprises: a catheter body, a plurality of axially spaced-apart hollow cylindrical vibrational transducers disposed along a length of the catheter body, a first spring connector wrapped around the outer surfaces of the vibrational transducers, where the first spring connector exerting an inward pre-stress on the outer surfaces of the vibrational transducers; and a second connector disposed in contact with the inner surfaces of the vibrational transducers. The second connector may comprise a spring coil, particularly a spring coil having multiple deflection points which contact an inner surface of the cylindrical vibrational transducer.

The invention relates to a ventilating and filtering device capable of automatically dedusting. The device comprises a bag type air filter and an automatic dedusting vibrator for driving the bag type air filter to vibrate, wherein a crank connecting rod mechanism consisting of the dedusting motor, the crank and the connecting rod of the automatic dedusting vibrator is hinged with a vibrating grate; the vibrating grate is flexibly connected with a filter bag support frame body by an elastic pull rod. According to the invention, the dedusting motor runs, circular motion is converted into reciprocating motion through the crank connecting rod mechanism to drive the vibrating grate to vibrate; a filter bag is clamped in the grates of the vibrating grate and vibrates along with the grates, so that the aim of dedusting is achieved. According to the invention, the circular motion of the motor is converted into the reciprocating motion through the crank connecting rod mechanism and is transmitted to the bag type filter through the vibrating grate, so that the vibrating grate is vibrated; the vibration mode has the advantages of large vibration amplitude, strong dynamics and the like; and the vibration mode is matched with the filter bag type air filter, so that the filtering effect and the dedusting effect can be effectively improved.

The invention discloses screening equipment for corn kernels, and relates to the field of corn screening. The screening equipment comprises a machine shell, an arc-shaped track is arranged on the front side of an inner cavity of the machine shell, a sliding block is slidably connected to the inner wall of the arc-shaped track, and one side of the sliding block extends to the rear side of the arc-shaped track and provided with a connecting rod. A screen cloth is arranged at one end of the connecting rod, a permanent magnet is fixedly installed on one side of the screen cloth, and an electromagnet is fixedly installed on one side of the inner side of the machine shell. A servo motor is fixedly installed at the top of the machine shell, a main shaft is connected to one end of a rotating shaftof the servo motor in a transmission mode, one end of the main shaft extends into the machine shell and fixedly provided with a rotating mechanism, and an elastic recovery mechanism is fixedly installed on the other side of the inner wall of the machine shell. The screening equipment for the corn kernels can apply gravitational acceleration to the screen cloth to increase the gravitational potential energy of the screen cloth when shaking, thereby increasing the vibration amplitude of the screen cloth, the corn kernels are screened more cleanly, and uniformity of the corn kernels is ensured.

The invention discloses an instrument for measuring static electricity on line, belongs to the field of static electricity monitoring, and particularly relates to the instrument for measuring static electricity on line. A static electricity sensor consists of a sensing metal surface, a shielding metal surface and an insulation sheet; the sensing metal surface is fixed on one surface of the insulation sheet; the shielding metal surface is fixed on the other surface of the insulation sheet; and a bimorph piezoelectric vibrator is fixed on the shielding metal surface of the static electricity sensor. The instrument for measuring the static electricity on line has the characteristics of low driving voltage, low vibrating frequency and large vibrating amplitude, can pass the safe explosion-proof authentication, and can measure the static electricity on line and make an alarm in places where oil products and flammable and explosive gases are stored and transported, so that a present blank in the field is filled up; and enough sensing voltage and sensing current can be obtained on the sensing metal surface, so that a final measurement value has a relative high linearity.

The invention discloses a screening machine for tea leaf processing. The screening machine for tea leaf processing comprises a box body and a bottom plate, a feeding pipe is arranged on the left sideof the upper end of the box body, a motor frame is arranged on the right side of the upper end of the box body, a motor is arranged at the upper end of the motor frame, a cam is connected to the leftend of the motor through a motor shaft, a movable rod is arranged in the middle of the upper end of the box body, and a pressing block is arranged at the upper end of the movable rod. According to thescreening machine for tea leaf processing, the motor works to enable the cam to act on the pressing block, and the movable rod is made to move downwards; when the cam moves to another position, the movable rod rebounds under the action of second springs, and the movable rod can move up and down so as to drive a coarse screen plate, a middle screen plate and a fine screen plate to shake up and down, and therefore the tea leaves can be screened; the screen plates are in sliding connection with the movable rod through a movable frame, the vibration frequency and the vibration amplitude of the screen plates are further improved, therefore the tea leaf screening efficiency of the screen plates is improved; and different material guide plates are arranged on the right side of the box body corresponding to different screen plates, and therefore collection is facilitated after screening is completed by the screen plates.

The invention discloses a vibration energy collector. The collector comprises a piezoelectric cantilever beam and a mass block. The piezoelectric cantilever beam comprises a main beam which is transversely arranged, a plurality of first auxiliary beams which are vertically arranged and a plurality of second auxiliary beams which are vertically arranged. One end of the main beam is a fixed end. The other end of the main beam is a free end. The mass block is fixed to the free end of the main beam. The plurality of first auxiliary beams are arranged with intervals and are fixed to one side of the main beam. The plurality of second auxiliary beams are arranged with intervals and are fixed to the other side of the main beam. By using the vibration energy collector, the main beam of the piezoelectric cantilever beam is provided with the plurality of first auxiliary beams and the plurality of second auxiliary beams; each auxiliary beam possesses a respective resonant frequency and resonant frequency points of the vibration energy collector are increased; and when each auxiliary beam generates vibration, voltage attenuation of two sides of each resonant frequency point is slow so that a bandwidth is increased. Simultaneously, through the auxiliary beams, an electricity production area is correspondingly increased, output electric energy is improved and a problem that a frequency point energy density is low is solved.

The invention provides a multi-cylinder serial crankshaft type flow power generating device based on the galloping effect to overcome the defects that an existing vortex-induced vibration power generating device is small in amplitude, low in output power and the like. The large amplitude of vibrators is motivated through rough belts, a crankshaft structure of a multi-cylinder internal combustion engine is used for reference, and the high-energy output density and large-scale power generating technology of a vibrator group is achieved. The whole device set mainly comprises the cylinder vibrators with the rough belts, shaft sleeves, connecting rods, crankshafts, a power generator, connectors, springs and the like. The two ends of each vibrator with the rough belt are connected to the corresponding shaft sleeve through the corresponding connectors, and the moving consistency of the vibrators under the same connecting rod is guaranteed. The reciprocated linear movement of multiple columns of vibrators of different phases is converted into the one-way rotation movement of the same crankshaft through a crankshaft transmission mechanism. One end of each crankshaft is connected with the power generator, and mechanical energy is converted into electric energy. According to the device, the centralized collecting of vibration energy of the vibrator group is achieved, the device can be widely applied to collection of river and ocean current energy, and high practicability and economic efficiency are achieved.

The invention relates to an electromagnetic type nonlinear resonance upscaling vibration energy collecting device, comprising two grades of vibrating systems, wherein the first grade comprises low frequency / high frequency vibration energy collecting subsystems, and copper coils of two collecting systems are vibrated in a nonuniform magnetic field, and generates power energy to output; the second grade vibrating system comprises a supporting spring, a permanent magnet combination and a first grade system. When vibration happens, the second grade vibrating system is under a resonance state, and the vibration response is odd harmonic component, primary and third harmonic components mainly; as the basic excitation, the low frequency collecting subsystem and the high frequency collecting subsystem are under a resonance state. The vibration energy collecting device can redistribute the vibration energy concentrated at low frequency to low frequency and high frequency vibrations. The invention is applicable to the vibration energy collection of aerospace, ship, and bridge building engineering structures, and particularly applicable to the engineering environment with weak vibration intensity; the device can provide power energy for the energy self-supply device and the wireless sensor network in the vibration control and health monitoring system.

The invention discloses an MEMS galvanometer-based micro laser three-dimensional imaging radar and an imaging method. The MEMS galvanometer-based micro laser three-dimensional imaging radar comprisesa two-dimensional MEMS galvanometer, a laser, a laser detector, a driving and control system and an imaging display system; a laser pulse emitted by the laser is reflected by the two-dimensional MEMSgalvanometer, and the reflected laser pulse is refracted to a certain scanning point in a target area; the angle of the MEMS galvanometer is extracted in real time, and the coordinates of the scanningpoint in the target area which is irradiated by the refracted light of the MEMS galvanometer at the angle are obtained; the coordinates of corresponding scanning points in the target area of a plurality of laser pulses are obtained, so that the target area can be divided into a series of dot matrixes; the laser detector receives light which is formed after the laser pulses are diffusely reflectedby the target, so that the laser detector can measure target distance information; the driving and control system is used for driving and controlling the two-dimensional MEMS galvanometer, the laserand the laser detector to work synchronously and sending the feedback information of the two-dimensional MEMS galvanometer, the laser and the laser detector to the imaging display system; and the imaging display system generates the three-dimensional image of the target area according to the dot matrixes and the target distance information. The MEMS galvanometer-based micro laser three-dimensionalimaging radar and the imaging method have the advantages of large scanning field angle, high scanning frequency and simple structure.

The invention relates to the technical field of sewage treatment equipment, in particular to membrane filtration equipment and method with an ultrasonic cleaning function as well as a sewage purification system. The membrane filtration equipment with the ultrasonic cleaning function comprises a filter membrane assembly, a pressure cylinder, an ultrasonic generator and a backwashing device, whereinthe filter membrane assembly comprises a purified water outlet connected with the backwashing device, a water inlet and a drain outlet are arranged on the pressure cylinder, the filter membrane assembly is arranged in the pressure cylinder, and the ultrasonic generator comprises a plurality of transducers arranged on the pressure cylinder and facing the filter membrane assembly. The equipment cancontinuously and efficiently treat sewage; during cleaning, the pressure cylinder is under certain pressure, large ultrasonic vibration amplitude contributes to falling of pollutants, each transduceris matched with a rotating mechanism to realize uniform coverage of ultrasonic waves, the equipment and operation cost is reduced, and the problem of offset caused by interference of ultrasonic wavesemitted by opposite transducers is solved.

The invention relates to a miniature electromagnetic type vibration energy collector and a manufacturing method thereof. The electromagnetic type vibration energy collector consists of a centre mass block, an outer support frame, two folded elastic beams, a plane spiral coil, two permanent magnets, an upper cover plate, a substrate and the like. In the electromagnetic type vibration energy collector, vibration structures (including the centre mass block and the folded elastic beams) are manufactured by using bulk silicon micromachine processing technique, the plane spiral coil is manufactured by using a surface micromachine processing technique and is manufactured on the upper surface of the centre mass block; and the two permanent magnets are located above the plane spiral coil in parallel. The energy absorber can work in a low frequency range, and mechanical energy vibrated in the environment is converted into electrical energy, thereby solving the problem that a wireless sense network or micro-nano device and the like depend on a battery to achieve supply feed. The energy absorber has the advantages of small volume, simple manufacturing method, wide application prospect and the like, and is easy to produce in batches.

An outdoor electric power cabinet disclosed by the present invention comprises a cabinet body, a rainproof cover, a filtering device and a slag discharging groove, the rainproof cover is fixed at two corresponding sides of the top of the surface of the cabinet body, and the filtering device is fixed between the top of the surface of the cabinet body and the two corresponding sides of the inner wall of the rainproof cover. The slag discharging groove is formed in the surface of the cabinet body and is located at the bottom of the filtering device, an air inlet is formed in the surface of the cabinet body and is located at the position of the filtering device, a heat dissipation mechanism is fixed to the top of the inner wall of the cabinet body and is located at the position of the air inlet, and a magnetic block is fixed to the back face of a fan blade of the heat dissipation mechanism. The invention relates to the technical field of power devices. According to the outdoor electric power cabinet, the purposes of filtering and self-cleaning are achieved, dust and sundries can be timely filtered and self-cleaned, adhesion to the surface of a filter screen is reduced, blockage can be effectively prevented, the filtering effect is good, meanwhile, heat dissipation is facilitated, the service life of components is prolonged, and the use performance is improved.

The invention provides a tidal current energy and vortex-induced vibration energy comprehensive power generation device. The tidal current energy and vortex-induced vibration energy comprehensive power generation device comprises a tidal current energy water turbine and a vortex-induced vibration energy capturing device. A power generator, a power distribution box and a rectifying and voltage-stabilizing device which are sequentially connected with an impeller through wires are arranged in a power generator cabin of the tidal current energy water turbine. The vortex-induced vibration energy capturing device comprises a shell, a vibrator sliding along a guide rail, and a piezoelectric plate, wherein the shell is mounted on the rear side of a single pile foundation, the two end edges of the vibrator are arranged on the top surface and the bottom surface of the shell, and the two ends of the piezoelectric plate are connected with the vibrator and the rear end face of the shell correspondingly; and a conductive copper sheet is arranged at the end, connected with the rear end face of the shell, of the piezoelectric plate and sequentially connected with the rectifying and voltage-stabilizing device and the power distribution box located in the power generator cabin through wires. Water flow enters the shell after encountering the single pile foundation of the water turbine, vortexes falling alternately are generated on the two sides of the pile foundation, and vortex resonance is formed when the vortexes pass through the vibrator; and under the wake flow galloping effect, the vibration amplitude of the vibrator is greater than the vibration amplitude caused by resonance of ordinary vortexes, the vibrator drives the piezoelectric plate to swing left and right, and thus mechanical energy is converted into electric energy.

The invention relates to the technical field of screening machines, in particular to an architectural sandstone screening device which comprises a work chamber. A feeding device is arranged in the middle of the upper end of the work chamber; slide rails and screening devices are symmetrically arranged between the middles of a first clapboard and a second clapboard; U-shaped frames are symmetrically arranged on the front side and the rear side of outer walls of the screening devices; vertical slots matched with the screening devices are symmetrically formed in the first clapboard and the secondclapboard; a collecting frame is arranged on the right side of the lower part of the vertical slot located on the second clapboard; a power device is rotatably connected to one sides, far away from the screening devices, of rotary rods through pin shafts; and a discharge hole is formed in the middle of the lower end of the work chamber. The architectural sandstone screening device provided by theinvention is reasonable in structure design, convenient to use, and capable of improving the sandstone screening efficiency, carefully classifying sandstone, and absorbing powder dust produced duringsandstone screening at the same time, and has high functionality and practicability.

The invention provides plastic building templates and buckle connecting pieces. Each plastic building template comprises a positive outrigger structure template, a negative outrigger structure template, an internal corner template, an external corner template and a joint angle mould; and the buckle connecting piece mainly comprises clamping plates, an eye bolt, an eccentric spanner, a support plate and the like, wherein the clamping plate is provided with a clamping hook part, clamping main parts and a support part; a clamped part mainly including support legs which are matched with the clamping parts of the clamping plates of the buckle connecting pieces is arranged in each plastic building template; and two lateral connection parts which are spliced with the adjacent plastic building templates are arranged on each plastic building template. When the templates and the buckle connecting pieces are used, the templates are mutually spliced tightly and firmly without leaking slurry, so that the compaction resistant capability of the templates is high, the templates and the buckle connecting pieces are convenient to mount, the detachment is time-saving and labor-saving, and the working hours and the cost are saved.