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1165results about How to "Reduce construction" patented technology

Piezoelectrically actuated microvalve

PCT No. PCT/EP97/06344 Sec. 371 Date May 20, 1999 Sec. 102(e) Date May 20, 1999 PCT Filed Nov. 13, 1997 PCT Pub. No. WO98/23868 PCT Pub. Date Jun. 4, 1998A microvalve has a base element provided with a passage opening, a tappet, a suspension device for guiding the tappet, and a piezoelectric actuator for actuating the tappet. The suspension device guides the tappet relative to the base element in such a way that the passage opening can be closed or opened by the tappet. The longitudinal dimensions of the piezoelectric actuator can be changed by the application of an electric voltage. Longitudinally spaced ends of the piezoelectric actuator are connected to longitudinally spaced ends of the suspension device in such a way that the suspension device provides a way for mechanical translation between the actuator and the tappet. A change in the longitudinal dimensions of the piezoelectric actuator caused by the application of an electric voltage to the piezoelectric actuator is mechanically translated by the suspension device into a movement of the tappet essentially at right angles to the longitudinal direction so that the passage opening will be opened or closed. In addition, the suspension device is secured to the base element with the aid of a hinge-like element. At least two spaced points are used to secure the suspension device to the base element.
Owner:FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV

Carst region double-arch road tunnel construction method

The invention discloses a carst region double-arch road tunnel construction method, which comprises the following steps; 1. carrying out construction preparation; 2. carrying out construction at channel openings; 3. adopting a three-pilot-tunnel method for constructing the channel inlet opening section, and adopting a step digging method for digging during the three-pilot-tunnel method construction; 4. adopting a middle-pilot-tunnel method for constructing the middle communication section of the channel, and adopting a full cross section method for digging during the middle-pilot-tunnel method construction; 5. adopting the three-pilot-tunnel method or the middle-pilot-tunnel method for constructing the channel outlet opening section, adopting the step digging method for digging when the middle-pilot-tunnel method is adopted for digging construction of the channel outlet opening section, and synchronously carrying out secondary lining construction from the front part to the back part in the digging construction process of the channel inlet opening section, the middle communication section of the channel and the channel outlet opening section. The invention has the advantages of reasonable design, simple and convenient construction, safe and reliable construction process, flexible construction mode, short construction period and greatly simplified construction steps, and effectively overcomes various defects during the traditional carst region double-arch road tunnel construction.
Owner:CHINA RAILWAY 20 BUREAU GRP +3

Sublevel open-stop and delayed filling mining method

InactiveCN102562065AImprove drilling positioning accuracyNo lossUnderground miningSurface miningTailings damFilling materials
The invention relates to a sublevel open-stop and delayed filling mining method. According to the method, cutting crosscuts are wholly undercut along the width of chambers and pillars so that the space of scope rock drilling is shared with ore drawing, drilling operations of vertical parallel blast holes are achieved in undercutting space, positioning accuracy of drilling the vertical parallel blast holes is high, the intervals among the blast holes are even, and the defect of high blasting boulder yield caused by drilling sector blast holes in traditional rock drilling cross cuts is avoided; during chamber (or pillar) scoping, driving of ore drawing gateways and ore drawing admission passages in fill materials of adjacent pillars (or chambers) isn't needed, and accordingly the safety is improved; simultaneously, ores are directly drawn from the undercutting space of the chambers and the pillars, the space of ore drawing is large, mutual interference is small, ore drawing efficiency is high, and ores are drawn completely without any dead space and secondary ore loss; artificial sill pillars are constructed, ore sill plates aren't needed to be reserved, the ores are free of primary loss, and the rate of resource recycling is high. Barren rocks and ore beneficiation tailings are used for filling gobs, the barren rocks are not taken out of pits, constructions of tailing dams and barren rock yards are reduced, and land occupation is small.
Owner:UNIV OF SCI & TECH BEIJING

Non-stand construction method for large bridge arch rib

The invention relates to a large-scale bridge (steel pipe concrete arch bridge) arch rib non-support construction method, which is characterized in that: the fastening tower process and hanging tower process are combined; the fastening anchor process and hanging anchor process are combined; rubber support is applied in the tower articulation (steel structure); steel twisted wire is used as the fastening-hanging tower -anti-wind rope (tower pressing cable); centralized working surfaces and steel twisted wires are adopted in the fastening-hanging process; steel pipe support are used in tower; and less fastening cables are used in the fastening-hanging process. The construction method reduces arch rib assembling places and mounting supports, accelerates the construction progress; the stayed-fastening cable construction uses the masts type tower hung by the cable to mount arch rib, reduces construction of a group of tower and anchor; by adopting less cable construction method, the invention reduces the anchor box segment positions on the tower and reduces anchor cable quantity; and by adopting one-time forming, monitoring and measuring method, the invention simplifies the arch rib mounting construction process and the cable adjusting construction engineering, increases production efficiency, accelerates construction progress and ensures arch rib mounting quality.
Owner:GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG

Composite Thermal Insulation Wall Body of a Building

InactiveUS20110258964A1Decreasing total construction weightImprove performanceWallsHeat proofingThermal insulationArchitectural engineering
A composite thermal insulation member of building is provided. It relates to the composite thermal insulation member of the building, especially the composite thermal insulation wall body and the composite roof aimed to solve the problem of high cost of the existing energy-saving wall body and the inconvenience of construction, the first structure is the core layer bonded inside the frame with the outer protecting layer provided on the surface of the core layer and the alkali-resistant netting fabric bonded to the outer protecting layer and the load-carrying component, the second structure is the core layer provided between the indoor and outdoor outer protecting layers and bonded each other, also the steel hoop fixed with the steel bars inside the indoor and outdoor outer protecting layers, the third structure is the outer protecting layer provided on two sides of the core layer and its upper side and bonded to it, also the core layer and the steel bars arranged inside the outer protecting layer as well as the outer protecting layer wrapped and surrounded by the alkali-resistant netting fabric, the fourth structure is the composite pillar anchored to the main structure and the core layer bonded to the main structure and the light composite pillar with the composite girder supported on the composite pillar and the plastered outer protecting layer on the composite pillar, composite girder and the outer side of the core layer, the fifth structure is the core layer provided between the upper and lower outer protecting layers with the lower outer protecting layer fixed to the girder or wall of the main structure, the invention has the advantages of low cost, convenience of construction etc. which is beneficial to the energy-saving of the construction and the reform of the wall body.
Owner:WU SHUHUAN

Production technology of hatch coaming and hatch cover

The invention discloses a manufacture technology for a hatch coaming and a hatch cover. The manufacture technology mainly comprises steps of the positioning of the hatch coaming, the surplus cutting, welding, then the assembly of the hydraulic equipment, pipelines and the electrical equipment, and then the hoisting of the hatch cover, the installation and the final debugging; the hatch coaming and the hatch cover adopt the following steps that firstly the actual main deck line type of the position of a dock where the hatch cover is positioned is copied onto a platform, and then positioning, the accurate detecting and welding are carried out according to the shape and the height of the hatch coaming on the platform; then the hydraulic equipment, the pipelines and the electrical equipment are assembled, after that, the hatch cover is hoisted; and finally the whole manufactured hatch coaming and the hatch cover are hoisted in a hatch position for one time and to be fixedly connected with a boat. Through the technology, the hoisting frequency of a gantry crane is reduced during the hoisting process, the hoisting time is reduced, and the hoisting efficiency is improved; the construction on the platform enlarges the usable operating region, and simultaneously the construction is more convenient and securer.
Owner:江苏熔盛重工有限公司 +1

Method for producing DHA by Schizochytrium in high-density culture through fermentation

The invention discloses a method for producing DHA by Schizochytrium in high-density culture through fermentation, relates to a preparation method of DHA, and provides a method for producing DHA by using a microbial fermentation method, which replaces fish oil to extract omega-3 polyunsaturated fatty acids. The method comprises the following steps of: inoculating strains in a shake flask according to the ratio of strains to a culture medium of 1: (5-10) for culturing until the dry weight of cells in fermentation liquor is 10-12g / L; inoculating the strains in the shake flask in a 1000L seed fermenter according to the inoculum size of 5-10%, culturing until the dry weight of the cells in the fermentation liquor is 20-24g / L; inoculating the strains in the 1000L seed fermenter in a 8000L seed fermenter according to the inoculum size of 5-10%, and culturing for 120-130 hours, wherein the dry weight of the cells in the fermentation liquor is 120-150g / L, and the DHA content is up to 26-30g / L. In the invention, through optimizing the culture medium and optimizing the culture conditions and by adopting a conventional fermentation method, the production rate of the DHA is at least 3 times more than the reported production rate. The production costs of the strains (the Schizochytrium), the culture medium and the culture condition are low, the yield is high, and the method is applicable to the industrial production of the DHA.
Owner:XIAMEN HUISON BIOTECH

Lightweight concrete exterior wall insulation building block and production method thereof

The invention discloses a lightweight concrete exterior wall insulation building block and a production method thereof. The lightweight concrete exterior wall insulation building block is prepared by mixing the following raw material components in proportion by weight: 20-50 of cement, 20-40 of fly ash, 8-20 of fine sand, 1-8 of calcareous material, 5-16 of plant filler, 0.2-0.5 of adjuvant, 8-15 of water and 0.3-0.7 of foaming agent. The production method of the lightweight concrete exterior wall insulation building block comprises the following steps of: forming raw material slurry by uniformly mixing production raw materials in mixing proportion; adding the water to the foaming agent, and generating uniform and stable bubbles by using a foaming device; mixing the bubbles with the raw material slurry so as to prepare bubble concrete slurry; and casting the bubble concrete slurry into a mold and curing. According to the lightweight concrete exterior wall insulation building block and the production method of the lightweight concrete exterior wall insulation building block, the plant filler, such as sawdust or crop straw powder, is mixed, so that the weight is reduced, the flexibility is improved, and the improvement on the strength of a finished product and the cracking prevention are favored; and the bubbles are enabled to be uniformly distributed in the raw material slurry by adding the foaming agent, so that not only is the weight of the building block reduced, but also the heat preservation and heat insulation effects are improved.
Owner:郑小东
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