Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

101results about How to "Avoid air gap" patented technology

Airtight lid for container and method of use

InactiveUS20060032852A1Facilitated releaseElongate length of timeLidsHermetic sealMembrane deformation
A lid for forming an airtight seal to a bowl or dish plate to elongate the life of product therein comprises an impermeable membrane having an outer perimeter larger than the rim of the container and an enforcement ring for enabling the formation of an airtight seal between the membrane and rim of the container under vacuum. The membrane is sufficiently soft to cause it to fill the lower sections or imperfections on the rim, thus enabling the lid to form an airtight seal to almost all household containers. The membrane may be adapted to have sufficient low tensile stress, thereby preventing the vacuum in the container from imploding or collapsing the container even if it has a thin or weak wall. The enforcement ring has vertical and horizontal rings connected to the membrane perimeter to prevent the membrane deformation at both vertical and horizontal directions. The lid may further comprise an air evacuation passageway having an air collection chamber for extracting air from the container and a valve for allowing air to flow out of the container but preventing air from entering. In use, the lid may be sealed to a container by simply pushing the membrane into the container and releasing the membrane to generate a vacuum to affix the membrane to the container, or may be sealed to a container by connecting a vacuum generator to the evacuation passageway to evacuate the container.
Owner:CAI EDWARD Z

Casting type split reactor

The invention discloses a casting type split reactor. A coil of the casting type split reactor comprises a first winding and a second winding which are arranged coaxially, and encapsulation parts of the first winding and encapsulation parts of the second winding are arranged alternatively from inside to outside in sequence. A first wire inlet bar and a second wire outlet bar are arranged at an interval radially and fixed at the upper end of the coil, and the other first wire inlet bar and a first wire outlet bar are arranged at an interval radially, connected with a current introducing end of the second winding in a conductive mode and fixed at the lower end of the coil. Each encapsulation part comprises a conductive part formed by winding a plurality of multi-layer round leads, and an insulation part formed by casting epoxy resin in a vacuum mode is arranged outside the conductive part. According to the casting type split reactor, the encapsulation parts are formed by casting epoxy resin in the vacuum mode through a casting mould, consistency of sizes of the insulation layers can be ensured, and uneven thicknesses of the insulation layers are avoided. In addition, no bubbles exist in the windings, partial discharge is reduced, occurrence of air gaps can be avoided effectively, and therefore, insulation performance of the insulation layers can be improved.
Owner:STATE GRID CORP OF CHINA +2

Gas-water separation fire retardant explosion venting device

The invention belongs to the technical field of safe transportation of a low-concentration gas pipeline, and relates to a gas-water separation fire retardant explosion venting device. The gas-water separation fire retardant explosion venting device comprises a gas inlet pipe (4) and a hollow barrel, wherein both ends of the hollow barrel are closed; a water inlet (9) which is communicated with an external pipeline is formed in one side wall surface of the hollow barrel; water in a cavity between the gas inlet pipe (4) and the hollow barrel is used for water-sealing gas in the gas inlet pipe; the upper end of the gas inlet pipe (4) is bent; a straight section which is eccentric with the hollow barrel is formed on the lower end of the bent section of the gas inlet pipe, and the lower end of the straight section is positioned below the water sealing surface; a perforated plate I (3) is arranged in the combining position of the bent section and the straight section, and the perforated plate I (3) is positioned above the water sealing surface in the plane; a perforated plate II (10) further sleeves the lower end of the straight section of the gas inlet pipe; a baffle (7) is welded on the inner wall surface of a gas outlet pipe. According to the gas-water separation fire retardant explosion venting device, explosion flames are effectively prevented from spreading, and the explosion pressure can be relieved under constant pressure.
Owner:HENAN DIESEL ENGINE IND

Hollow oblique metal microneedle array and manufacturing method thereof based on SU-8 mold

The invention discloses a hollow oblique metal microneedle array and a manufacturing method thereof based on an SU-8 mold, and belongs to the field of micro and nano-manufacturing processes. Accordingto the microneedle array, a metal material is platable metal; a hollow inclined metal microneedle is in an oblique cone shape with the oblique angle being 50 degrees to 70 degrees; the vertical height is 500mum to 650mum; the hollow oblique metal microneedle is of an iso-wall thickness structure from the bottom part to the tip end and has the wall thickness being 8mum to 10mum; the outer diameterof the bottom part of the hollow inclined metal microneedle is 150mum to 250mum; a cone angle of the hollow inclined metal microneedle is 10 degrees to 15 degrees; and the tip end is formed on the top part of the hollow inclined metal microneedle. According to the hollow oblique metal microneedle array and the manufacturing method thereof based on the SU-8 mold provided by the invention, an SU-8mold mask pattern is transferred onto a glass sheet, so that the problem that an air gap exists in traditional contact exposure is solved, the ultraviolet light intensity arriving at each layer of photoresist is improved, and the binding force of a microneedle mold and a base is higher. OmniCoat is fully used, so that the adhesivity of the SU-8 mold and the glass sheet is improved, and meanwhile,the SU-8 mold can be easily removed in the later period of the process. The oblique circular truncated cone microneedle is etched through RIE, so that the tip end is obtained, and the metal microneedle tip end structure is realized.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Stator coil bar structure of large power generator

InactiveCN106169824AHomogenized transposition narrow surface electric field distributionAvoid air gapWindings insulation shape/form/constructionWindings conductor shape/form/constructionElectrical conductorCopper wire
The invention provides a stator coil bar structure of a large power generator. The stator coil bar structure comprises a main insulation unit, a semiconductor band, electromagnetic wires, an inter-row insulation unit, semiconductor putty and a bare copper wire. The stator coil bar structure is characterized in that the inter-row insulation unit is arranged in the middle of each electromagnetic wire; a gap generated by transposition is filled with the semiconductor putty on transposition narrow surfaces on two sides of the electromagnetic wire, and four corners of the semiconductor putty on the upper and lower narrow surfaces are rounded; and the transposition narrow surfaces on the outer side of the semiconductor putty are paved with the bare copper wire welded together with a conductor of the electromagnetic wire, and then a stranded wire of the conductor is wrapped with the semiconductor band with the same resistance range as the semiconductor putty. The stator coil bar structure has the characteristics that a conductor structure has good overall shape and a semiconductor equipotential layer is improved, so that the effects of homogenizing electric fields at the corners of the main insulation unit of the stator coil bar of the large power generator, inhibiting local discharge, reducing additional loss of the coil bar and avoiding local overheating to prolong the service life of the main insulation unit are achieved; and the unit capacity and operation reliability of the power generator are improved.
Owner:HARBIN UNIV OF SCI & TECH +1

Sealing structure of aluminum-plastic composite sheath high-voltage cable joint

PendingCN109962442AAvoid situations where the shield is grounded at theAvoid enteringCable junctionsCopper wireElectrical connection
The invention relates to a sealing structure of an aluminum-plastic composite sheath high-voltage cable joint. The sealing structure comprises two aluminum-plastic composite sheath high-voltage cables, a copper shell around a cable joint, and an insulating heat-shrinkable tube for performing a waterproof treatment on the copper shell, and is characterized by further including a plastic composite material for fixing the copper shell and a sealing strip. The specific sealing operation comprises steps of reversely folding the copper wire shields in the two aluminum-plastic composite sheath high-voltage cables to the outer surface of the aluminum-plastic composite sheath; sleeving the outer side of a cable intermediate joint with the copper shell; folding the portions of the tail ends of the copper wire shields end exposing the tail end of the copper shell to the outer surface of the copper shell, and welding the portions to the copper shell by a lead seal to complete the electrical connection of high-voltage cable metal shield; wrapping the plastic composite material between the copper shell and the high-voltage cable body; wrapping and sealing the cable with a waterproof insulating tape; and finally disposing the insulating heat-shrinkable tube on the joint of the two aluminum-plastic composite sheath high-voltage cables and the copper shell, and performing a waterproof sealing treatment by a sealing strip.
Owner:上海三原电缆附件有限公司

Casting method of electric furnace water cooling cast steel furnace cover

The invention relates to a casting method of electric furnace water cooling cast steel furnace cover, which adopts a cast steel material to cast a base body and a cooling water pipe. The casting method comprises the following steps: adding a slagging agent and a silicon iron alloy block in molten steel for casting steel; putting the cooling water pipe into a casting model and leading a liquid cold medium and a composite solid cooling medium to pass through the cooling water pipe; using molten steel for casting steel to cast the base body, casting the middle part of the cooling water pipe into the base body and leading the two ends thereof to extend from the base body; leading the casting model to be horizontal when in modeling, leading a feeder head to be modeled lopsidedly toward one side and heightening one side of the feeder head of the model after the model is boxed; adopting an upper layer of inner sprue and a lower layer of lower sprue to carry out stepped casting so as to form sequential solidification; and cooling and disassembling the model. The casting method can effectively avoid the cooling water pipe from being penetrated in a fusing manner during the casting process, avoids air gaps from being generated between the base body and the cooling water pipe, avoids refusion and recrystallization, accurately realizes the microfusion of the outer surface of the cooling water pipe, prolongs the service life of the electric furnace water cooling cast steel furnace cover, further prolongs the service life of a metallurgical high-temperature kiln, saves production cost and improves the mechanical performance of the electric furnace water cooling cast steel furnace cover.
Owner:江苏联兴成套设备制造有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products