34results about How to "Guaranteed absorption effect" patented technology

The invention discloses an active resonance C-type buoyancy pendulum wave energy power generation device which is a cabin-shaped wave energy power generation device completely immersed in water. The active resonance C-type buoyancy pendulum wave energy power generation device comprises an energy harvesting system, a power generation system and a raft type base, wherein the energy harvesting systemcomprises a cabin-shaped pendulum body, an automatic mass center adjusting device is arranged in the pendulum body, the pendulum body is fixedly connected to a main shaft, the main shaft is connectedwith the power generation system, the main shaft is further provided with an encoding disc used for testing the swing of the pendulum body, the two side surfaces of the pendulum body are parallel, awave-sheltering surface is of a structure with a larger arc on the upper portion and a smaller arc on the lower portion, wherein the two arcs are concentric, a spiral line, an involute and a high-order curve are adopted for transition between the two arcs, the distance between the outer normal of the transition curve and the axis of the main shaft is the smallest, the wave-facing surface is a plane or an inward-concave arc surface or a curved surface the same as the wave-sheltering surface, the power generation system comprises a chain, a ratchet wheel, a reversing shaft, a speed increaser anda permanent magnet generator, and the power generation system is internally arranged in a pendulum body cabin or located outside the pendulum body. By adjusting the mass center position of the activeresonance C-type buoyancy pendulum wave energy power generation device, real-time resonance between the pendulum body and the wave is realized, and efficient conversion of wave energy is realized.

The invention provides a microband microwave absorbing device and a method based on a phase-adjustable supersurface, comprising at least one unit structure. The unit structure comprises a metal structure, a dielectric substrate, a first via, a second via, a ground substrate, a varactor diode, a first via, a second via penetrating the dielectric substrate and the ground substrate, and one end of the first via hole is connected to the metal structure, and the varactor diode is connected between symmetrical metal structures of the metal structure. The control unit adjusts the phase response distribution of the cell structure by providing a reverse bias voltage to the cell structure and adjusting the varactor diode. By applying the bias voltage to the sub-wavelength cell to change the electromagnetic state, the independent phase of the super-surface cell structure can be adjusted, and then the reflected phase of the incident field in the super-surface cell structure can be arbitrarily changed, which has the characteristics of simple design, easy processing, flexible application and so on.

The invention provides an absorbing material and a preparation method thereof. The absorbing material comprises a base material; an absorbent; an anti-aging agent; and a solvent, wherein the absorbentcomprises magnetic hollow microspheres made of hollow glass microspheres The absorbing material reduces the density of the material while ensuring the absorbing property and the mechanical property,and can effectively meet the requirement of light weight of the material.

The invention discloses a convenient-to-clean sputum suction device for a pneumology department, and relates to the technical field of sputum suction devices for the pneumology department, and aims tofully clean sputum adhered to a sputum suction collection box. The sputum suction device specifically comprises a box body, two cover plates are connected to the outer wall of one side of the box body through hinges, the sputum aspiration collection box is arranged on the outer wall of the top of the box body, a graduated scale is arranged on the inner wall of one side of the sputum aspiration collection box, three connectors are fixed to the outer wall of one side of the sputum aspiration collection box through bolts, a liquid outlet pipe is fixed to the outer wall of one side of the sputumsuction collection box through screws, a sealing cover plate is slidably connected to the outer wall of the top of the sputum suction collection box, a water disc is welded to the outer wall of the bottom of the sealing cover plate, and two or more flushing heads are fixed to the outer wall of the bottom of the water disc through bolts. Water in the water tank can be pressurized through a pressurepump, meanwhile, an insertion hole is formed in the outer wall of the top of the sealing cover plate, and the water in the water tank can be rapidly guided into the water disc through a flushing pipe.

The invention relates to a low-frequency P-waveband wave-absorbing material and a preparation method thereof. The method comprises the following steps: modifying graphene powder by adopting a first surfactant to prepare functionalized graphene dispersion liquid; compounding the functionalized graphene dispersion liquid with spherical magnetic alloy particles through a high-energy ball milling method to prepare a functionalized graphene/flaky magnetic alloy particle composite absorbent; carrying out coating treatment on the composite absorbent by adopting a second surfactant to prepare a low-frequency P-waveband absorbent; and mixing the low-frequency P-waveband absorbent with ethylene propylene terpolymer, and carrying out rubber mixing and calendering processes to obtain the low-frequencyP-waveband wave-absorbing material. A new idea is provided for expanding the low-frequency P-waveband wave-absorbing material, the effective absorption bandwidth of the prepared wave-absorbing material can be flexibly adjusted within the waveband range of 0.3-1.0 GHz according to needs, and meanwhile the material has good mechanical and construction performance after being formed and is easy to adhere to surfaces of various structural parts.

The invention belongs to the field of material preparation, and relates to a foam-type cobalt/carbon composite wave-absorbing material and a preparation method thereof. To solve problems that pore structures are uncontrollable, electromagnetic wave absorption strength cannot be adjusted and the like in cobalt/carbon composite materials prepared by existing methods, and on the basis of constructinga porous material by fully utilizing a hard template method, the preparation method for preparing the foam-type cobalt/carbon composite wave-absorbing material based on polystyrene microsphere templates is provided. PS microspheres are adopted as hard templates and the foam-type cobalt/carbon composite material is obtained through in-situ filling, growth, template removing, calcination and otherprocessed. By adjusting the particle size of the PS microspheres, effective control of the pore structure of the composite material can be achieved, and the control method is simple. The preparation method is expected to be popularized as a universal controllable method for porous magnetic metal/carbon composite wave-absorbing materials, and lays the experimental foundation for the later establishment of a univariate relationship between the pore structure and wave absorbing performance.

The invention provides a large-area vacuum suction tool system. The large-area vacuum suction tool system comprises an extruded section bar, a plane suction plate and a vacuum generator, wherein the extruded section bar is provided with a long groove, the plane suction plate is arranged on the extruded section bar and is provided with a plurality of first through holes, the vacuum generator is arranged in the long groove, and two ends of the extruded section bar are respectively provided with a left side plate which is provided with a communication hole and a right side plate which is provided with two communication holes; a vacuum storage space is formed by the extruded section bar, the plane suction plate, the left side plate and the right side plate, the vacuum generator is arranged in the vacuum storage space, and the vacuum storage space can be directly used as a shell of the vacuum generator; the bottom part of the plane suction plate is also provided with a buffer sealing layer, the buffer sealing layer is provided with second through holes which are communicated with the first through holes, and the first through holes are internally provided with vacuum flow adjusting devices. The large-area vacuum suction tool system provided by the invention has the advantages that the structure is simple, the size is smaller, and an article in high-mass can be sucked; in addition, the large-area vacuum suction tool system is suitable for various kinds of mechanical arms and various kinds of sucked articles, and the application range is wide.

The invention relates to a fire-fighting wall-passing platform for the ultra-high and ultra-wide shielding darkroom, including a shielding passage arranged on the shielding wall, a fire shielding dooron the outside of the shielding tunnel, and a fire-fighting platform which is arranged on the inside of the shielding channel through hinges and is flush with the shielding wall after being fastened,wherein a protective ring chain is arranged between the upper end of the shielding channel and the free end of the fire-fighting platform, and a fire hydrant is installed on the fire-fighting ring corridor outside the shielding channel; the fire-fighting wall-passing platform can be installed at the middle height of the shielding wall, the fire extinguishing requirements for the ultra-high and ultra-wide shielding darkroom can be met by using the shielding passage, the unfolding of the fire-fighting platform and the fire hydrant on the fire-fighting ring corridor, fire-fighting passages of different heights are provided for the fire hydrant extinguishing system of the ultra-high and ultra-wide darkroom under the premise of ensuring the shielding performance and the microwave absorbing performance of the darkroom, and the problem that the range of the ground fire hydrant is insufficient can be solved.

The invention discloses an adjustable chip fixing fixture for chip processing equipment, and relates to the field of chip fixing fixtures. The adjustable chip fixing fixture comprises a fixture base and a material bearing plate base, the material bearing plate base is connected to an adapter seat on the fixture base, chip pre-containing grooves are formed in the material bearing plate base, a main adjusting support is arranged on one side of the material bearing plate base, and auxiliary adjusting supports extending into the chip pre-containing grooves are integrally formed on one side of the main adjusting support. The adjustable chip fixing fixture for the chip processing equipment has the beneficial effects that the main adjusting support and the auxiliary adjusting supports are subjected to traction change by combining and controlling telescopic rods of a first electromagnetic telescopic rod and a second electromagnetic telescopic rod to change, therefore, the length and width changes of a rectangular containing groove formed between the auxiliary adjusting supports and the chip pre-containing groove edge structures are adjusted, the length and width sizes of chip containing grooves are determined according to the positions, corresponding to the first scale mark line and the second scale mark line, of the auxiliary adjusting supports, and adjustment is convenient.

The invention discloses a design method of a vacuum chuck, and belongs to the technical field of sorting and packaging machinery design. A vacuum cavity is arranged to be in an inverted funnel shape, and an air channel, an inverted funnel-shaped vacuum cavity and a suction sleeve are coaxially designed; a closed partition plate is arranged between the suction sleeve and the vacuum cavity, a suction air groove in the inner wall of the suction sleeve is designed into a spirally-distributed suction air groove, and an inner cavity of the suction sleeve is designed into a frustum-shaped inner cavity with a narrow upper part and a wide lower part; and the ratio of the sum of the cross sectional areas of all the suction air grooves in the inner wall of the suction sleeve to the cross sectional area of the air channel is controlled to range from 0.3 to 0.45. The vacuum chuck designed through the design method can grab 10-15 flaky materials at a time, the suction effect is good and stable, and the situation of material losing is not prone to occurring even if shaking occurs.

The invention relates to the technical field of vacuum chucks, in particular to an unpowered vacuum chuck with an automatic centering function. The unpowered vacuum suction cup mainly aims at solving the problems that an existing unpowered vacuum suction cup cannot be centered according to the size of an object when sucking the object, generally, the positions of suction cups on the two sides need to be adjusted through manual visual inspection, and consequently the stability is not good enough in the final sucking process; according to the technical scheme, the device comprises a connecting rod and a control box connected to the upper end of the connecting rod, a second suction cup is connected to the middle of the lower end of the connecting rod through a mounting bottom plate, a transmission adjusting mechanism is arranged in the connecting rod, and the transmission adjusting mechanism comprises two connecting rods slidably connected to the lower surface of the connecting rod in a penetrating mode; the lower end of the connecting rod is connected with a moving rod through a connecting block. The automatic centering vacuum chuck has the automatic centering function, the centering precision is improved through automatic adjustment, the suction effect can be guaranteed, and compared with an existing vacuum chuck, the technology is greatly improved.

The invention discloses a polymer-based electromagnetic shielding composite material with a gradient structure and a preparation method thereof, and belongs to the technical field of electromagnetic shielding material preparation. The invention solves the problem of lack of a method for preparing a polymer-based electromagnetic shielding composite material with a gradient structure from iron-containing dust mud, steel slag, waste plastics and steel fibers in the prior art. According to the technical scheme, the method comprises the following steps that S1, preparing materials; S2, preparation:respectively weighing the iron-containing dust mud, the waste plastics, the steel slag and the steel fibers in proportion, and putting the components into a screw extruder for heating and mixing to amolten state; s3, molding: placing the steel slag-waste plastic-steel fiber polymer-based composite material in a molten state at the lower half part of a mold cavity, placing the iron-containing dust mud-waste plastic polymer matrix composite material in a molten state at the upper half part of the mold cavity, and then performing pressure molding, unloading and demolding to obtain the polymer matrix electromagnetic shielding composite material with the gradient structure. The method is suitable for preparing the electromagnetic shielding composite material.

The anti-radiation composite door with the wave absorbing and shielding structure comprises a door frame, an upper supporting channel is installed at the top of the door frame, a rotating rod is installed on the inner wall of the upper supporting channel in a penetrating mode, a rotating roller is installed on the outer side of the rotating rod, and a transmission belt is installed on the outer side of the rotating roller; a limiting sliding block is installed on the lower surface of the transmission belt through a connecting piece, and a steel shell is installed at the bottom of the limiting sliding block. According to the invention, the first radiation sensor is installed, the first radiation sensor detects the indoor radiation intensity, the second radiation sensor detects the outdoor radiation intensity, the first radiation sensor and the second radiation sensor transmit the detected information to the display screen, and the display screen displays the detected information. The anti-radiation composite door is convenient to remind outside people of how far away from the door from radiation, and meanwhile, whether the anti-radiation effect of the anti-radiation composite door reaches the expected level or not is judged through internal and external radiation intensity detection.

The invention relates to a sharp-bottomed paper bag forming machine which comprises a feeding mechanism, a puncturing mechanism, an edge glue coating mechanism, a forming mechanism, a snapping mechanism, a conveying mechanism, a bottom glue coating mechanism, a bottom folding mechanism and a collecting mechanism which are sequentially arranged, and is characterized in that a forming adjusting mechanism is arranged between the forming mechanism and the puncturing mechanism; the forming adjusting mechanism comprises a paper folding plate mounting base connected with the top of a paper folding plate of the forming mechanism, the paper folding plate mounting base is erected on the puncturing mechanism through oppositely-arranged fixing bases, and a left-right adjusting driving source is arranged on one side of each fixing base. A left-right adjusting mechanism capable of adjusting the relative position of the paper folding plate mounting seat between the two fixing seats through a left-right adjusting driving source is arranged between the fixing seats and the paper folding plate mounting seat, the conveying mechanism is an air suction type conveying mechanism, and the air suction type conveying mechanism comprises an air suction conveying belt and an air suction box, and air suction holes are evenly distributed in the surface of the air suction conveying belt.