53results about How to "Tight protection" patented technology

The invention relates to a CFB boiler membrane-wall grid anti-wear alloy plate and effectively solves the problems of the prior art. According to the technical scheme, the anti-wear alloy plate comprises an alloy plate body, a first concave arc transition is arranged between one side and bottom of the alloy plate body, a second concave arc transition is arranged between the other side and bottom of the alloy plate body, the sum of angles of the first arc transition and second arc transition is no less than 180 degrees, and one or multiple inner grooves corresponding to the membrane-wall pipe in diameters are formed in the bottom of the alloy plate body between the first arc transition and second arc transition. The alloy plate is tighter in protection, material is saved, construction is facilitated, efficiency is improved, welding is firmer, and controllability is high.

The invention discloses a welding system and a welding method for all-position automatic welding of a small-diameter pipeline, and relates to the technical field of pipe welding. The welding system comprises a supporting main body with an opening, wherein a rotating disc and a clamp holder base are arranged on the supporting main body, and the rotating disc can rotate on the supporting main body; a welding gun is further arranged on the rotating disc; and a rapid clamping device is arranged on the clamp holder base and comprises clamping positioning angle blocks and clamping rotating blocks which are oppositely arranged around the rotating circle center of the rotating disc, and the clamping positioning angle blocks and the clamping rotating blocks can move relative to each other. The welding system can effectively meet the requirements of factory sites and other pipeline systems with small pipe diameters, high pipeline concentration, multiple pipeline turning points, multiple crossed positions and narrow construction space, and welding equipment is small in size and convenient to assemble and disassemble.

The invention discloses a demolition construction method for an overpass existing line arch bridge. The demolition construction method comprises the steps: 1, erecting a protective shed frame; 2, carrying out static crushing demolition on the arch blasting demolition structure; 3, manually removing the blasting protection layer; 4, cutting the removed arch ring; 5, hoisting the arch ring to be hoisted; and 6, dismantling the under-arch structure. The method is simple, reasonable in design, easy and convenient to construct and good in using effect; the protection shed frames fixed to the frontside and the rear side of the removed arch bridge are adopted for effective protection, meanwhile, the structure on the arch of the removed arch bridge is removed in the mode that static crushing andmanual chiseling are combined, it is guaranteed that a plain concrete arch ring cannot be damaged in the static crushing process, and an existing spanned railway line cannot be disturbed. After the arch ring is exposed, the removed arch ring is cut and decomposed through a rope saw and then hoisted and removed, then the under-arch structures on the left side and the right side are rapidly removed,the construction period can be effectively shortened, the arch bridge removing efficiency is improved, and the removing process is safe and reliable.

The invention provides a three-dimensional star-shaped alpha-helix polypeptide with high-efficiency gene delivery capability, and a preparation method and application thereof. Dendritic molecules areused as an initiator and dichloromethane is used as a reaction solvent to initiate high-speed ring-opening polymerization of different types of N-carboxylic anhydride monomers, and groups with different electric properties are introduced at the tail ends through a click chemical reaction. Rich amino groups on the surfaces of the dendrimers provide enough polymerization sites, so that the polypeptide forms a three-dimensional spherical topological structure, and meanwhile, the topological structure provides an opportunity for acceleration of the initial stage of a ring-opening polymerization reaction. The polypeptide side chain modified guanidino/amino groups and the like bring higher positive charge density, high-efficiency gene loading capacity can be obtained through electrostatic interaction between positive charges and negative charges, and an alpha spiral rigid structure on a secondary structure is enhanced, so that the polypeptide has higher membrane penetrating capacity. The polypeptide has a great development prospect in the field of biomedical materials, particularly gene delivery through properties of the polypeptide.

The invention relates to a coal mining adit ending roadway or dead region supporting support and a hydraulic support withdrawing method and discloses a coal mining adit ending roadway supporting support. The support comprises a plurality of hydraulic supports which are arranged in an ending roadway or a dead region for supporting the ending roadway or dead region roofs. The hydraulic supports are close to one side of an ending roadway caving region and are vertically and parallelly arranged on the back goaf coal wall side arranged in the ending roadway or the dead region. A plurality of rows of hydraulic single props are further arranged in the ending roadway and are arranged along the ending roadway vertically and form a withdraw channel with one side coal wall of the ending roadway, which is away from the hydraulic supports, and the tops of the hydraulic single props support the roadway air channel. The invention further discloses a coal mining adit supporting support hydraulic support withdrawing method. By means of the supporting support and the method, recyclable support material hydraulic supports and hydraulic single props are withdrawn, and accordingly, the hydraulic support safety withdrawing is guaranteed, and potential safety hazards of withdrawing of the hydraulic supports are prevented.

The invention relates to a protecting method an optical-fiber grating sensor and belongs to the technical field of optical fiber sensing and structure health monitoring. The protecting method includes: fixing a composite-material laminated board (2) to a workbench; sleeving protective sleeves (4) at two ends of the optical-fiber grating sensor (5), placing the optical-fiber grating sensor (5) on the surface of the composite-material laminated board, allowing the sleeves to extend into the end face of the composite-material laminated board at a certain distance, using quick-drying glue to fix optical fibers and the sleeves, and evenly coating the surface of the composite-material laminated board with adhesive mu mm in thickness to fix the optical fibers (3) and the protective sleeves; neatly laying glass fiber cloth on the adhesive, mounting putty strips on the periphery of the fiber cloth, fixing a thin film special for vacuumizing with the putty strips, and vacuumizing the whole glass fiber cloth surface with a vacuumizing device under normal temperature until the relative vacuum degree reaches -0.1MPa; curing the whole structure for gamma hours under normal temperature. Compared with the prior art, the protecting method has the advantages that the method is simple in process flow and little in influence on the mechanical performance and assembling of composite-material structural components.

The invention discloses automatic clamping and transferring equipment of a chuck clamp of a lacquer round plate. The automatic clamping and transferring equipment structurally comprises side baffles,a chuck hanging frame box, an electric control box, a buffer halfpace block, a conveying linkage mechanism, a supporting table groove and a U-shaped base; and the bottom of the chuck hanging frame boxis in clearance fit with the top face of the conveying linkage mechanism, and the chuck hanging frame box is welded to the rear side of the electric control box. A shaft wheel lifting frame is applied to be matched with a four-claw chuck, diaphragm face arc claw blocks downwards slide through short sliding rail groove frames, a three-claw chuck is emulated at the bottom of a chuck frame ring to form a reverse buckle effect that a round surface low lining is close to the plate, and corrugated diaphragms downwards slide in the four directions of the front end, the rear end, the left end and theright end in a matched mode to be attached to round edges to form the effect of edge side end wrapping; and then an arc groove disc seat is matched with a sleeve wheel bearing seat to rotate to drivea lifting strip plate to transfer the plate to ascend and descend, a workbench is subjected to moving protection on a plate production assembly line, the cost is low, a mechanical framework is simple, and the effects of protecting and guaranteeing the material quality are achieved.

The invention discloses a construction protective fence for building construction. The construction protective fence comprises a gateway which comprises four gate rods, the four gate rods are connected through hinges, a vertical fence is arranged between the two horizontal gate rods, two L-shaped plates are welded to the outer side walls of the two vertical gate rods, through holes are formed in the ends, far away from the gate rods, of the L-shaped plates, screws are connected to the interior of each through hole in a sleeved manner, and nuts are arranged on the screws; struts are welded to the bottoms of the gate rods and are of hollow structures, the struts are connected with supporting rods through sleeves, and clamping blocks are connected to the supporting rods; and nuts are arranged on the surfaces of the supporting rods through threads. The construction protective fence is simple in structure, saves materials, and is convenient to mount and demount, convenient to transport and wide in using scope.

The invention provides a database protection method. In the method, a verification mechanism and multiple rules form a protection layer; each rule includes a verification definition allowing or rejecting database access; and after receiving a user access request and before verifying the user/password in the database, the protection layer verifies the connection request and judges whether to allowor reject the request according to all rule definitions. Through the method, the protected database is only accessible to the network domain in the designated range, and the possibility of data leakage can be effectively avoided even in the case of user/password leakage in the database. The client connection is necessary to conform to the designated transmission and verification mode; and the method can forcibly requires encryption of the transmission process and adoption of a stricter verification mode so as to prevent acquisition of password and data through network peep.

The invention discloses an intelligent window with a real-time environment change monitoring function, and relates to the field of intelligent homes. The intelligent window mainly comprises a shutter mechanism and a window linkage mechanism. Indoor and outdoor environment changes are detected through a raindrop sensor, a temperature and humidity sensor and the like so as to achieve the functions of automatic opening and closing of the window and protection of the window, and man-machine interaction is achieved through a voice module and a serial port screen, so that people can conveniently set time by themselves, and the functions of reasonable light shielding and lighting, sound insulation and the like are realized. The safety problem caused by the fact that the window cannot be closed in time when severe weather such as rainstorm or typhoon occurs and nobody is at home can be effectively solved, and the practicability is relatively high.

The invention relates to an anti-corrosion stainless steel pipe for a ship. The anti-corrosion stainless steel pipe comprises an anti-corrosion stainless steel pipe body and anti-corrosion paint smeared on the surface of the anti-corrosion stainless steel pipe body. The anti-corrosion stainless steel pipe body comprises, by mass percent, Cr, Ni, Ti, Nb, Mo, Si, C, S and N. According to the anti-corrosion stainless steel pipe, electrochemical corrosion can be effectively avoided through the Cr element; and through a coating formed after the anti-corrosion paint is dried and cured on the surfaceof the stainless steel pipe body, existence of a corrosive medium on the surface of the stainless steel pipe body is prevented, permeation of water, oxygen and ions to a paint film is obstructed, a compact protection function is achieved on the stainless steel pipe body, and the corrosion resistance and oxidation resistance of the stainless steel pipe body can be effectively improved.

The invention discloses a water-based cooling lubricating liquid for stamping an automobile thick plate. The lubricating liquid is prepared from the following raw materials in parts by weight: naphthenic base oil, macromolecular polyester, a special nonionic emulsifier, boric acid, sebacic acid, benzotriazole, diethanol amine, triethanolamine, distilled tall oil acid ester, tetrameric ricinoleate, an ether carboxylic acid low-foam emulsifier, a hard water resisting agent, a settling agent, a defoaming agent, glycerol, potassium hydroxide, a coupling agent, a biological stabilizer and purified water. A unique emulsifying additive scientifically emulsifies and disperses high-molecular synthetic ester components, so that stable and compact lubricating effect and surface protection effect can be provided. An environment-friendly settling agent and an ionic surface active agent are adopted, it is guaranteed that metal filings generated in the stamping process are rapidly settled and removed, the metal filings cannot be adsorbed on a die to scratch the metal surface, and the water-based cooling lubricating liquid has excellent lubricating performance, anti-rust performance and settling and cleaning performance, can meet the lubricating and cooling requirements of automobile thick plate stamping, does not contain chlorinated paraffin and is good in environmental protection property.

The invention belongs to the technical field of glass processing, and discloses a polishing device capable of achieving multi-axis switching. The polishing device comprises a transmission shaft, polishing wheel units, driving gears and a rotating cross beam, wherein each polishing wheel unit comprises at least two polishing wheel assemblies, and each polishing wheel assembly comprises a driven gear; the driving gears sleeve the transmission shaft and are connected with the driven gears in a matched mode; and the polishing wheel units are connected to the rotating cross beam. The rotating crossbeam rotates to drive the polishing wheel units to revolve, the types and the sizes of the polishing wheel assemblies in each polishing wheel unit can be different, the driving gears are connected with the driven gears in a matched mode, and under the driving of the driving gears, the different polishing wheel assemblies are switched for polishing processing, so that one main shaft drives the multiple sets of polishing wheel assemblies, different processing requirements can be met by combining the polishing wheel assemblies with different types, the expansibility is high, the polishing efficiency is high, and the device is compact in layout, tight in protection, convenient and fast to install and maintain, high in gear transmission precision, low in noise and long in service life.

The invention discloses a rehabilitation orthosis for a patient suffering from unstable ankle joint. The rehabilitation orthosis comprises a heel mat, a binding belt and a protection belt, wherein theheel mat adopts a design of a cambered surface; a tightening device is arranged on the lower surface of the heel mat; the protection belt which is arranged on two sides of the tightening device and extends upwards is connected to the binding belt; the protection belt adopts a design that the upper part is narrow and the lower part is wide; an inner concave radian is formed in the middle part; thebinding belt adopts a U-shaped design; a lantern ring and a tightening belt are arranged at the end of the binding belt; and hook and loop fasteners are separately arranged on the surfaces of the tightening belt and the binding belt. The rehabilitation orthosis disclosed by the invention has the advantages that the rehabilitation orthosis can assist shape straightening for the unstable ankle joint, is suitable for a patient suffering from the unstable ankle joint or a person suffering from ankle damage to perform shape straightening, is convenient and swift to wear and is comfortable and convenient to walk; and the inner side and the outer side of the ankle are tightened through pulling force for shape straightening, so that the situation that during walking, the ankle is excessively bentis avoided, and the unstable ankle joint can be effectively treated.

The invention discloses a heat insulation protection structure of an engine exhaust system. The structure comprises a first heat insulation cover and a second heat insulation cover, wherein the shapeof the first heat insulation cover and the shape of the second heat insulation cover are both matched with the shape of the outer surface of the exhaust system, and the first heat insulation cover andthe second heat insulation cover are both wrapped around and fixed on the outer surface of the exhaust system in a matched mode; the first heat insulation cover comprises a first protection cover anda first heat insulation layer fixed on the inner side of the first protection cover, and the first protection cover is fixed on the outer surface of the exhaust system in a full-length welding mode;the second heat insulation cover comprises a second protection cover and a second heat insulation layer fixed on the inner side of the second protection cover, and the second protection cover is fixedon the outer surface of the exhaust system in a full-length welding mode; and the edge of the first protection cover is fixedly connected with the edge of the second protection cover through a convexlug structure. According to the structure, the structure is tight, the waterproof performance is good, the heat insulation performance is good, and the appearance quality is good.