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431results about How to "Reduce deformation rate" patented technology

Star-rotation type rotary device adopting gate valve structure

The invention discloses a star-rotation type rotary device adopting a gate valve structure. The star-rotation type rotary device comprises a cylinder body and a main shaft, wherein a circular-barrel-shaped cavity is formed in the cylinder body; the main shaft is supported by cylinder body sealing end covers at the two sides of the cylinder body; a centre sun gear roller is sleeved on the main shaft; a gate valve groove is formed on the cylinder body along the centre line direction of the cylinder body; a gate valve plate is arranged in the gate valve groove; the gate valve plate is switched between a withdrawing status and an extending status; an annular piston space is formed by an outer cylindrical surface of the centre sun gear roller and an inner cylindrical surface of the cylinder body; a cylindrical planetary piston wheel is arranged in the annular piston space in a rolling manner; when the gate valve plate is in the withdrawing status, the planetary piston wheel passes through the gate valve plate; and when the gate valve plate is in the extending status, the far end of the gate valve plate contacts the outer cylindrical surface of the centre sun gear roller at the inner side surface of the annular piston space. According to the star-rotation type rotary deice adopting the gate valve structure disclosed by the invention, the difficulty of machining the cylinder body can be reduced, and the integral intensity of the cylinder body is improved.
Owner:BEIJING ROSTAR TECH

Process for excavating and constructing micro-steps of tunnels on basis of method for excavating steps

The invention provides a process for excavating and constructing micro-steps of tunnels. The process includes steps of excavating upper steps without reserved core soil, obliquely and downwardly drilling foot lock anchor rods at arch feet and hermetically attaching the foot lock anchor rods to base rock by means of grouting or by the aid of anchor agents; controlling and keeping the lengths of the upper steps, simultaneously excavating the upper steps and intermediate steps without reserved core soil and arranging foot lock steel pipes and lock anchor rods for the intermediate steps; circularly carrying out the steps by three times; keeping synchronously excavating the upper steps and the intermediate steps, simultaneously erecting trestles, starting to excavate lower steps and close inverted arches without reserved core soil, and then closing the inverted arches; synchronously advancing excavation of the upper steps, the intermediate steps and the lower steps, and carrying out alternate circular operation for synchronously excavating each upper step, the corresponding left intermediate step and the corresponding right lower step and synchronously excavating the upper step, the corresponding right intermediate step and the corresponding left lower step until the tunnels are completely integrally excavated. The process has the advantage that effects of guaranteeing the tunnel construction safety and increasing the construction speeds can be effectively realized.
Owner:CCCC SECOND HIGHWAY ENG CO LTD +1

Supporting structure for composite anchor mesh steel bar support of deep well high-stress soft rock roadway and construction method thereof

The invention provides a supporting structure for a composite anchor mesh steel bar support of a deep well high-stress soft rock roadway and a construction method thereof. Firstly, anchor rods and anchor ropes are stroke into the interior of surrounding rock, and the set length is exposed; then, steel bar meshes and polyester fiber meshes are laid and hung through the outward-exposing portion of the anchor rods and the anchor ropes, the steel bar meshes are closely attached to the surrounding rock to be laid, and the polyester fiber meshes are closely attached to the steel bar meshes to be laid; a steel bar mesh shell support is erected; the anchor rods and the anchor ropes pass through the steel bar meshes, the polyester fiber meshes and the steel bar mesh shell support in sequence and are fixed on the steel bar mesh shell support through trays and nuts; a first concrete shotcrete layer is poured to close the whole supporting structure, and initial supporting is finished; and finally, a second concrete shotcrete layer is poured, and second supporting is finished. Through initial supporting, the whole structure and the surrounding rock deforms jointly, the yielding effect is given play, and surrounding rock pressure is released, and then second supporting is conducted. Meanwhile, the flexibility and pressure releasing effects of the polyester fiber meshes are utilized, so that the surrounding rock pressure is evenly distributed in the whole supporting system.
Owner:ANHUI UNIV OF SCI & TECH

Water-cooled heat dissipation type pressure-resistant electronic cabin

ActiveCN106413351AEasy to installImprove the convenience of loading and unloading and post-maintenanceModifications by conduction heat transferUnderwater vesselsHeat sinkWhole systems
The invention discloses a water-cooled heat dissipation type pressure-resistant electronic cabin which comprises a main cabin body. A front end cover and a rear end cover are respectively arranged on both ends of the main cabin body. The main cabin body is sealed into a cavity by the front end cover and the rear end cover. A heat dissipation device is arranged in the cavity. The heat dissipation device comprises four heat sinks which are supported by cross-shaped telescopic brackets on both ends and are arranged on the inner wall of the cavity through the cross-shaped telescopic brackets. The heat sinks are arranged on electrical components. According to the water-cooled heat dissipation type pressure-resistant electronic cabin, the pressure-resistant cabin casing and the internal electrical device are respectively two separate systems, and can be completely separated; the convenience of assembling and debugging is improved; the electrical device is arranged on a separate heat dissipation bracket; the heat dissipation bracket can transfer heat of the electrical components to the wall of the pressure-resistant cabin and water outside the cabin; heat dissipation of the electrical device in the cabin body is realized; and in addition, the support effect of the heat dissipation bracket on the cabin wall enhances the pressure-resistant ability of the pressure-resistant cabin casing and improves the reliability of the whole system.
Owner:JIANGSU UNIV OF SCI & TECH

Integrated liquid storage pot and novel zinc-bromine redox flow battery

The invention discloses a structure and a fabrication method of an integrated liquid storage pot, and a novel zinc-bromine redox flow battery. The novel zinc-bromine redox flow battery comprises a liquid storage pot 1, a liquid supply pump A2, a liquid supply pump B3, an anode pipeline system 41, a cathode pipeline system 42, a galvanic pile 5, an anode return pipe 71 and a cathode return pipe 72; the liquid storage pot 1 is connected to the liquid supply pump A2, the liquid supply pump B3, the anode return pipe 71 and the cathode return pipe 72, respectively; the galvanic pile 5 is connected to the anode pipeline system 41, the cathode pipeline system 42, the anode return pipe 71 and the cathode return pipe 72, respectively; the liquid supply pump B3 is connected to the anode pipeline system 41; and the liquid supply pump A2 is connected to the anode pipeline system 41 and the cathode pipeline system 42. The anode and the cathode of the battery are connected back to the same liquid storage pot 1, so that the migration problem is fundamentally solved; the system is simple and the fault rate is low; and the same liquid supply pumps are adopted for supplying liquid so that the pressure on the two sides of the anode and cathode pipeline systems is balanced, and the deformation rate of the material is reduced.
Owner:江苏恒安储能科技有限公司

Screen printing equipment for circuit board

The application relates to screen printing equipment for a circuit board, and the screen printing equipment comprises a rack. A conveyor device and a screen printing mechanism are arranged on the rack; the conveyor device comprises a conveyor belt, a placing plate, a locating column and a lifting device, and the conveyor belt, the placing plate, the locating column and the lifting device are arranged on the rack; the screen printing mechanism comprises a sliding seat, a silk screen, a sliding table, an ink scraping assembly, a first driving assembly and a second driving assembly, and the sliding seat is arranged on the rack; and the silk screen and the sliding table are arranged on the sliding seat, and the ink scraping assembly is arranged on the sliding table. According to the screen printing equipment, the circuit board is driven by the conveying belt to move forwards, and the lifting device is started for driving the locating column to locate the circuit board; then, the first driving assembly is started to enable the silk screen to come into contact with the circuit board, and the second driving assembly is started to print soldering paste on the silk screen onto the circuit board; Manual work is required in the soldering paste printing process of the circuit board, and the time is saved; and the problem of lower production efficiency of a screen printing machine is solved.
Owner:SHENZHEN HAISIKE AUTOMATION TECH

Method for preparing low-deformation polyurethane damping bumper block

ActiveCN104341579AIncreased chemical crosslinkingReduce deformation ratePrepolymerIsocyanate compound
The invention relates to a method for preparing a low-deformation polyurethane damping bumper block. The method is used for solving the technical problem in the prior art that the deformation rate is high after the polyurethane bumper block for an automobile is subjected to dynamic fatigue, and is used for improving the safety and comfort of the bumper block in a continuous working environment. The method comprises the processing steps: (1) pretreating isocyanate; (2) preparing a prepolymer; (3) preparing a chain extender; (4) blending; (5) carrying out cast molding; (6) carrying out post-vulcanization. The prepared low-deformation polyurethane damping bumper block has the advantage that the deformation rate of the fatigued bumper block is lowered on the premise that the dynamic fatigue performance and comprehensive performance of the bumper block are maintained. According to the method disclosed by the invention, modified MDI and macromolecular and polyfunctional ether polyalcohol are adopted to react, and a microporous elastomer material, of which both hard segment phase and soft segment phase contain certain chemical crosslinking, is prepared, so that the requirements of current medium- and high-end automobiles on bumper blocks which have low deformation after dynamic fatigue are met.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI

Desulfurized gypsum 3D (three dimensional) printing alkali-activated cementing material and use method thereof

ActiveCN109678445ARegulating the rate of setting and hardeningImprove mechanical propertiesAdditive manufacturing apparatusSolid componentAlkali activated
The invention belongs to the field of 3D (three dimensional) printing building materials and particularly relates to a desulfurized gypsum 3D printing alkali-activated cementing material and a use method thereof. The alkali-activated cementing material is prepared from a solid component and a liquid component which are separately stored, wherein, in parts by weight, the solid component comprises 40 to 60 parts of slag, 20 to 50 parts of desulfurized gypsum, 0.02 to 0.05 part of an activator, 3 to 10 parts of attapulgite clay, 0.1 to 0.5 part of a thickening agent and 1 to 5 parts of water absorbent resin; the liquid component comprises 20 to 40 parts of water. According to the invention, the desulfurized gypsum is taken as a main raw material; the extrusion requirements necessary for 3D printing are met by adding an admixture to synergistically regulate the setting and hardening rate and rheological property of the alkali-activated cementing material. The desulfurized gypsum can be recycled, and the use amount of the slag is reduced, so that the cost is reduced; in addition, the alkali-activated cementing material can be applied to 3D printing on a large scale to develop high-efficiency and green building materials.
Owner:UNIV OF JINAN

Planographic plate for laser digital scanning and manufacture method thereof

The invention relates to printing lithography, in particular to a printing lithographic plate (UV-CTP) for laser digital scanning and the preparation method thereof. The preparation method of the printing lithographic plate (UV-CTP) comprises the following steps: firstly cleaning, neutralizing, electrolyzing and oxidizing aluminum plate strip materials and hole-sealing to obtain the plate base; then, spread-coating the prepared photosensitive coating liquid on the plate base through extruding; and obtaining the UV-CTP after drying. The UV-CTP plate, following the photosensitive CTP plate and the thermosensitive CTP plate, belongs to a novel plate which can be directly imaged through computer digital laser scanning without pretreatment. Compared with the conventional PS plate and CTP plate, the UV-CTP plate has the following characteristics and advantages that the aluminum plate rolling technique with low deformation rate and low surface defect ensures that the plate base of the plate has better physical properties, particularly, the UV-CTP plate is advantageous in manufacturing cost, preservation period and universality over other CTP plates; and the UV-CTP plate has the characteristics of high dot reducibility, high photosensitive speed, great operating latitude and wide application, etc., therefore, the UV-CTP plate is applicable to printing materials, such as metal, plastic, etc., by the UV ink.
Owner:龙马铝业集团有限公司
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