112results about How to "Achieve barrier" patented technology

The invention discloses a controllable-respiration preservative film and a preparation method thereof. The method comprises the following steps: dissolving a water-soluble polyhydroxy plasticizer in water, adding the reaction raw material, heating until the raw material is completely dissolved in water, dispersing at high speed, and cooling to 50-70 DEG C to prepare a solution for running filming; and running the solution for running filming onto a steel belt on a running production line via a die head, and drying to obtain the controllable-respiration preservative film. The controllable-respiration preservative film is prepared from the reaction raw materials in percentage by mass: 60-80% of polyvinyl alcohol, 10-30% of water-soluble polyhydroxy plasticizer, 1-5% of moisture respiration regulator, 1-3% of compatilizer, 3-10% of water retention agent and 0.5-3% of assistant. The preservative film has high barrier property for oxygen and nitrogen sources; the bidirectional permeation exchange power for moisture can be effectively regulated and controlled through the raw material formula; and thus, the preservative film can ensure free respiration and moisture exchange of fruits and vegetables in the preservation process.

The invention relates to a low thermal radiation type fiber reinforced composite for lighting, a daylighting panel and a preparation method thereof. The composite comprises 50-80% of unsaturated polyester resin (UPR), 18-45% of glass fibers, 0-1% of an assistant, 1.0-2.5% of a curing agent, 0.3-1.0% of an accelerator and 0.1-10% of an infrared barrier, wherein the assistant is one or more of an antioxidant, an ultraviolet light absorber and a light stabilizer, and the infrared barrier is a nanometer oxide capable of absorbing or blocking infrared rays. Through reasonable design of the formulaof the low thermal radiation type fiber reinforced composite for lighting, blocking of infrared rays can be effectively achieved on the premise that the lighting rate completely satisfies using requirements.

The invention discloses a micro-ecological restoration method for farmland heavy metal pollution and belongs to the technical field of soil heavy metal pollution farmland control. The method comprises the following steps that (1) before crops are planted, charcoal dust and micro-biological mixed bacterium liquid are applied into soil along with plowing of the soil; and (2) in the mid-term of plant growth, micro-biological mixed bacterium liquid and micro-biological mixed culture media are applied into the earth surface through a spraying mode. The micro-ecological restoration method for farmland heavy metal pollution is conducted along with farm operation, and the effect is good, large-scale utilization can be achieved; particularly, most of used micro-biological composite bacterial agents are active bacteria, reproduction can be conducted in the soil environment, and heavy metal can be continuously subjected to adsorption and complexation; the used charcoal dust, micro-biological mixed bacterium liquid and the like are all biological materials so that the materials can be completely degraded into organic materials and absorbed by plants, and the soil is protected against secondary pollution; and therefore, at present, the method has specially obvious advantages.

The invention relates to the technical field of electric forklifts, in particular to an electric forklift battery pack and an assembling method thereof. The electric forklift battery pack includes a box body, a box cover and an electric core limiting frame, wherein the box cover is covered with the box body, and the electric core limiting frame is fixedly connected to the box body interior; a plurality of parallel gratings are arranged in the electric core limiting frame at equal intervals, parts in the electric core limiting frame are divided into a plurality of electric core inserting grooves by the gratings, and a plurality of electric cores arranged side by side are inserted into the electric core inserting grooves; insulation assemblies are all arranged in the circumferential direction and at the bottom of the electric cores, the electric cores are fixedly fastened in the electric core inserting grooves by limiting fastening parts arranged above the electric cores; and the electric cores are connected together in series by busbars. Secondary assembling of the electric cores is not needed by modules, the electric cores are packed directly by a battery pack structure, time is shortened, and energy is saved.

The invention discloses a blue-ray preventing and antistatic protecting film. The protecting film comprises a first separating film layer, a first blue-ray preventing film layer, a first basilar film layer, an antistatic film layer, a second basilar film layer, a second blue-ray preventing film layer and a second separating film layer in sequence from top to bottom, wherein the first separating film layer and the upper surface of the first blue-ray preventing film layer are connected through an adhesive; the second blue-ray preventing film layer and the second separating film layer are connected through the adhesive; the first blue-ray preventing film layer and the second blue-ray preventing film layer are both made of blue-ray preventing glue; the antistatic film layer is made of antistatic glue liquid. Obstruction of blue-ray is realized by absorbing and converting the blue-ray emitted by luminescent sources of a panel display device, an LED neon light, a fluorescent lamp, and the like; damage of the blue-ray to eyes is relieved greatly; human eyes are protected; meanwhile, the protecting film effectively prevents static electricity, and avoids influence and damage, such as dust adsorption, breakdown of coating, and electric shock of human body, caused by discharge of static electricity to production.

The invention belongs to the field of soil treatment, especially to the field of pollution site remediation and more specifically relates to a pollution site remediation obstructing method under a non-excavating manner. According to the pollution site remediation obstructing method under the non-excavating manner, one mucky clay layer in soil is taken as a bottom obstructing layer, by means of themanner that vertical obstructing walls deep into the mucky clay layer are constructed, a pollution site obstructing space with a horizontal obstructing layer and a vertical obstructing layer is formed; and by means of the manners that the mucky clay layer is utilized as the horizontal obstructing layer, and the vertical obstructing walls are established on the periphery of the mucky clay layer, under the precondition of non-excavating and on the basis of a construction project water stopping curtain process, the natural low-permeability mucky clay layer is utilized, obstructing between the periphery and the bottom of a pollution area can be economically and effectively realized, pollutants are effectively intercepted, and the pollutants are prevented from vertical infiltration and horizontal diffusion along with groundwater.

The invention discloses a window film core functional layer and a preparation method thereof. The window film core functional layer comprises a PET substrate thin film, and a first transparent oxide layer, a first composite metal layer, a second transparent oxide layer, a second composite metal layer, a third transparent oxide layer and an outer side seal layer which are sequentially deposited from bottom to top by magnetron sputtering. The preparation method of the window film core functional layer comprises the step of sequentially performing coating in six chambers of a six-chamber coiling type magnetron sputtering coating machine or a double-roller and three-chamber coiling type magnetron sputtering coating machine to form the magnetron sputtering layers. The window film core functional layer has the beneficial effects that an Au layer with the thickness of 3-10nm is deposited at the outer side of the third transparent oxide by magnetron sputtering, so that the infrared reflectivity is increased to 90% from 80%; the reflectivity of visible light is reduced while the infrared reflectivity is increased, so that the temperature in a chamber using the window film core functional layer is maintained to be constant while lighting is not influenced.

The invention relates to the technical field of building structures and discloses a building frame structure with a good anti-seismic effect. The building frame structure comprises a building frame, aconstruction foundation and a cushioning layer, wherein the bottom of the building frame is fixedly connected with the top of the cushioning layer, the top of the construction foundation is fixedly connected with the bottom of the cushioning layer, the building frame is fixedly connected with the construction foundation through the arranged cushioning layer. According to the building frame structure with the good anti-seismic effect, the construction foundation is formed by the design of a cable-stayed anti-seismic device and the design of a cable-stayed anti-seismic device support, the shockabsorption effect of the building frame can be effectively ensured, the stability and the high-efficiency shock absorption effect of the building frame is ensured, the collapse of a building arrangedon the construction foundation is avoided, the current use requirements are met, and in the event of an earthquake of lower magnitude, longitudinal waves and transverse waves of seismic waves are generated by the design of the cable-stayed anti-seismic device support, part of the energy can be effectively absorbed, so that the vibration of the building with smaller amplitude is generated, the collapse is avoided, the shock absorption function is realized, and the stability of the building is effectively guaranteed.

The invention discloses an anti-gas interference type MEMS gas sensor and a preparation method thereof. The method comprises the following steps of depositing and forming a metal electrode layer on the surface of an oxide layer; depositing an insulating layer on the surface of the metal electrode layer by using a chemical vapor deposition method; depositing a gas sensitive material layer on the surface of the insulating layer; depositing a layer of separation membrane on the surface of the gas sensitive material layer in a coating or printing manner, wherein the pore diameter of a nano channelof the separation membrane is smaller than the motion diameter of interference gas molecules. When the MEMS gas sensor is manufactured, the separation membrane is added, and the pore diameter of thenano channel of the separation membrane is smaller than the movement diameter of interference gas molecules, so that the interference gas molecules collide in quantity in the nano channel of the separation membrane and cannot pass through the separation membrane, and the interference gas is blocked; the influence of interference gas on sensitive materials in the sensor is avoided, the accuracy ofa thermal sensor is improved, and the selectivity of the thermal sensor to target gas is better.

The invention is suitable for the technical field of solar cells, and provides a selective contact area buried solar cell and a back contact structure thereof. The back contact structure comprises grooves arranged on the back of a silicon substrate at intervals; a first dielectric layer, arranged on the back surface of the silicon substrate and at least covers the groove; P-type doped regions and N-type doped regions arranged on the first dielectric layer and alternately arranged in the grooves; a second dielectric layer arranged between the P-type doped region and the N-type doped region, and the number of the second dielectric layer being at least one; and a conductive layer disposed on the P-type doped region and the N-type doped region. According to the back contact structure provided by the invention, the problems of high control requirement on the width of the groove and poor passivation effect in the prior art are solved.

The invention discloses a dimming function film, a dimming function assembly and a dimming function device. The dimming function film comprises an upper electrode layer, a dimming function layer and a lower electrode layer from top to bottom. The dimming function layer comprises a polymer dispersion liquid crystal base material and a UV blocking function compound dispersed in the polymer dispersion liquid crystal base material. The UV blocking function compound is selected from one or more of a viologen compound, dipyridine and a derivative thereof, anthraquinone and a derivative thereof, tetrathifulvalene and a derivative thereof, and pyrazoline and a derivative thereof. In the dimming function film, the compounds are dispersed in the polymer dispersion liquid crystal base material to form the dimming function layer. In the actual operation process, the compounds can be promoted to react by contorlling a direct current power source, and therefore controllable passing of ultraviolet light is achieved. The turning direction of liquid crystal molecules in a PDLC base layer is controlled by controlling the alternating current voltage, and therefore conversion between brightness and darkness is achieved.

The invention discloses an energy-saving environmental-protection water oil separating pipeline. The energy-saving environmental-protection water oil separating pipeline comprises a pipeline; two symmetrically arranged end ports of the pipeline are designed to be a mixed liquid inlet and a water outlet; the middle part of the pipeline is provided with at least one opening, and the openings at themiddle part of the pipeline are designed to be oil outlets; one side of the internal part of the pipeline close to the mixed liquid inlet is provided with an oil blocking plate which is capable of isolating oil but is not capable of isolating water; the bottom end of the oil blocking plate is connected with an elastic top member; the elastic top member is fixedly arranged on the internal wall of the pipeline; under the force of the elastic top member, the oil blocking plate is capable of maintaining a horizontal position under water impact force effect. According to the energy-saving environmental-protection water oil separating pipeline, oil-liquid standing layering is caused because of the different specific gravities, the oil blocking plate which is capable of isolating oil but is not capable of isolating water is adopted, so that liquid firstly flows into the energy-saving environmental-protection water oil separating pipeline is discharged through the water outlet, and petroleum later flows into the energy-saving environmental-protection water oil separating pipeline is capable of driving the oil blocking plate to move, the oil outlets arranged under the oil blocking plate areexposed, and petroleum is discharged through the oil outlets.

The invention discloses a silicon carbide/hafnium carbide nanowire modified silicon carbide coating enhanced graphene honeycomb-based nano aerogel heat-insulating and wave-absorbing composite material, which is composed of silicon carbide coating enhanced graphene honeycomb, silicon carbide/hafnium carbide nanowires and nano aerogel, firstly, a silicon carbide coating is prepared on the surface of a graphene honeycomb through a chemical vapor deposition process, and then internal pores of the graphene honeycomb are reinforced on the silicon carbide coating through a chemical liquid vapor deposition process to prepare the silicon carbide/hafnium carbide nanowire. And finally, nano aerogel is prepared on the surfaces of the silicon carbide/hafnium carbide nanowires through a sol-gel process, a supercritical drying technology and a carbonization reaction, a formed three-dimensional network structure can effectively block heat transmission and promote the absorption and dissipation effects on electromagnetic waves, and the heat insulation and wave absorption performance of the composite material is cooperatively provided.

The present invention provides a folding beam structure-based multi-degree of freedom passive vibration isolation device for a spacecraft flywheel. The vibration isolation device is mainly composed of an installation platform, folded beam vibration isolation units, an installation base and the like. The vibration isolation device is installed between the spacecraft flywheel and an spacecraft body structure, and used for reducing the influence, on stability and precision of the spacecraft platform, of additional high-frequency micro-vibration disturbance generated in the working process of the flywheel under the premise of not influencing the attitude control performance of the spacecraft flywheel, and reducing the work environment noise of satellite-borne sensitive loads.

The invention relates to a closed type combined trolley conductor device suitable for a poor working condition. The closed type combined trolley conductor device comprises a rail (1) and a current collector (2), conductive bands (1c) are arranged in the rail (1), the current collector (2) comprises a shell body (2a) and conductors (2b) arranged on the shell body (2a), an opening is formed in the lower end of the rail (1), flanges (1d) are arranged on the two sides of the upper portion of the opening, and two folio sealing soft bands (3) are arranged on the opening of the rail (1). The sealing soft bands (3) are respectively attached to the lower end of the current collector (2) tightly at the contact position of the rail (1) and the current collector (2) and the position, stretching out of the opening of the rail (1), of the lower end of the current collector (2). The opening of the rail (1) is sealed by the two folio sealing soft bands (3) at the position, separated from the current collector (2), of the rail (1). The device blocks dust, oil, vapor and the like, carries out blocking protection on the interior of the guide rail, and has the good protection function on the current collector.

The invention provides a magnetic isolation and heat dissipation protection cover of a hydraulic cover and a magnetic isolation and heat dissipation method. The magnetic isolation and heat dissipationprotection cover comprises a barrel and a cooler. The barrel is arranged on the hydraulic cylinder in a covering mode. An end plate is mounted at the bottom end of the barrel. A mounting hole allowing a piston rod of the hydraulic cylinder to penetrate through is formed in the top end of the barrel. A conductive fiber layer covers the outer wall of the barrel. A cooling cavity is formed in a barrel body of the barrel. A mixed solution for occurrence of reversible reaction is stored in the cooling cavity. Grounding conducting wires are fixedly arranged on the end plate. The cooler communicateswith the cooling cavity and is used for performing heat exchanging and cooling on the mixed solution. The cooler comprises a water inlet pipe communicating with an outlet and a water outlet pipe communicating with an inlet. A first suction device is arranged between the water inlet pipe and the outlet, and a second suction device is arranged between the water outlet pipe and the inlet. The barrelis an aluminum alloy barrel. The end plate is an aluminum alloy end plate. The first suction device and the second suction device can be used for sucking liquid and/or gas. By means of the magnetic isolation and heat dissipation protection cover, magnetic isolation and heat dissipation for the hydraulic cylinder can be achieved well.

The invention is suitable for the technical field of solar cells, and provides a selective contact area buried solar cell and a back contact structure thereof. The back contact structure comprises grooves arranged on the back of a silicon substrate at intervals; a first dielectric layer, arranged on the back surface of the silicon substrate; a first doped region, arranged on the first dielectric layer and arranged in the groove; a second doped region, arranged on the first dielectric layer and arranged outside the groove; a second dielectric layer, arranged between the first doped region and the second doped region, and the number of the second dielectric layer being at least one; and a conductive layer disposed on the first doped region and the second doped region. According to the back contact structure provided by the invention, the problems of high control requirement on the width of the groove and poor passivation effect in the prior art are solved.

The invention discloses a sectional chock-flow type pipeline self-sealing valve. The sectional chock-flow type pipeline self-sealing valve comprises a valve main body, flange plates, a valve rod, a valve plate, first sealing rings and a second sealing ring, the flange plates are correspondingly welded to the two sides of the valve main body, a first mounting opening is formed in the middle of thevalve main body, a second mounting opening and a third mounting opening are formed in the two sides of the third mounting opening correspondingly, meanwhile the first mounting opening, the second mounting opening and the third mounting opening are correspondingly connected with a first sealing plate, a second sealing plate and a third sealing plate through bolts, connecting rods on the lower partsof the sealing plates are located at sliding openings in the lower parts of chock-flow plates, connecting rods on the two chock-flow plates are connected with linkage rods through screws, the first sealing rings are correspondingly arranged on the two sides of the sealing plates, and meanwhile upper part screws of the linkage rods are connected with reset springs. According to the sectional chock-flow type pipeline self-sealing valve, the valve in the valve body is blocked, and when the valve plate is dismantled, mediums in the pipelines on the two sides of the valve plate can be avoided fromflowing out

The invention provides a display panel. The display panel comprises a backboard, a cover board, a first spacer and a second spacer, wherein the backboard is provided with a first surface; the cover board is arranged opposite to the backboard and is provided with a second surface opposite to the first surface; the first spacer is arranged on the edge of the first surface in a protruding mode, is ofa closed structure and is provided with a first free end which is connected to a first connecting end of the backboard and extends away from the backboard; the second spacer is arranged on the edge of the second surface in a protruding mode, is of a closed structure and is provided with a second free end which is connected to a second connecting end of the cover board and extends away from the cover board; and the first free end abuts against the second free end.

The invention discloses a method for reducing interference of the ground to a PCB high-speed signal line, and relates to the technical field of PCB board cards. Aiming at the problem of poor transmission of high-speed signals of more than 10G, the technical scheme is adopted as follows: an isolation strip is additionally arranged on a PCB card, and the isolation strip is positioned between the high-speed signals of more than 10G and a power supply module with high radiation energy or a large-current power supply copper surface and a dense power supply ground via; at least two filter capacitorsare arranged on the isolation strip at intervals; and the isolation strip is used for isolating electromagnetic interference generated by other signals and a power supply GND outside a high-speed signal reference GND of more than 10G and weakening the interference through the filter capacitors when connected with other reference GND. The invention further discloses a device for reducing the interference of the ground to the PCB high-speed signal line. The device is essentially the isolation strip on the PCB board card and the filter capacitors arranged on the isolation strip at intervals, theinterference reducing device is the same as the interference reducing method, and the device can method can reduce interference and protect the signals, and the space utilization rate of the PCB board card is increased.