5results about How to "Avoid repair work" patented technology

The invention discloses a rapid identification method and a monitoring system for a fatigue damage stage of an asphalt mixture. The identification method comprises the following steps: acquiring an acoustic emission signal generated by a test piece in a fatigue loading process and DIC image data of surface deformation of the asphalt mixture test piece; drawing a curve chart of acoustic emission accumulated impact number and energy changing along with loading times; performing graying processing on the DIC image data, and preliminarily judging spatio-temporal information of the crack; fitting an acoustic emission parameter curve; based on the impact number in the window and the change of acoustic emission energy, the asphalt mixture fatigue damage stage is divided; and aligning the time of the acoustic emission signal with the time of the crack space-time information, and determining the fatigue instability precursor information of the asphalt mixture and the instability failure initial position of the corresponding test piece according to the acoustic emission parameter characteristics before the instability failure of the test piece. According to the method, the acoustic emission signal impact number, energy and DIC image data are combined, and the instability damage of the asphalt mixture is predicted according to the acoustic emission parameter characteristics before fatigue instability of the asphalt mixture.

The utility model relates to the technical field of building heat preservation, and particularly discloses a building outer wall structure which comprises mechanical self-tapping ground anchors used for penetrating through building gridding cloth to reinforce a heat preservation layer of a building outer wall. The mechanical self-tapping anchor comprises a round metal anchor disc, a round metal screw, a round metal screw expansion head, a round metal threaded sleeve and a threaded anti-shaking rod. A round metal screw is fixedly installed in the middle of the round metal anchor disc and fixedly connected with a round metal screw expansion head, and the round metal screw expansion head is far away from the round metal anchor disc. The circular metal threaded sleeve is connected with the circular metal screw rod in a plugging manner; and a plurality of threaded anti-shaking rods are fixedly mounted on the edge of the circular metal anchor disc. Safety accidents caused by a heat preservation layer of a building outer wall after an earthquake can be reduced.

The utility model discloses a kind of super-thick prefabricated thermal insulation wallboard installation fixed components, including prefabricated GLC board and cast-in-place concrete beam, the lower portion of cast-in-place concrete beam is provided with embedded part, and the upper portion of prefabricated GLC board is connected with cast-in-place concrete beam by cast-in-place concrete beam bottom embedded part. The middle of the prefabricated GLC board is provided with thermal insulation layer, fixed screw rod is inserted into prefabricated GLC board from thermal insulation layer side, and the inner side of GLC board is provided with connecting piece, connecting piece is L-shaped, top and cast-in-place concrete beam bottom embedded part are connected, fixed screw rod is threaded through prefabricated GLC board and passes through connecting piece, and is fastened using nut. The super-thick prefabricated thermal insulation wallboard installation fixed component can realize the quick installation and fixation of super-thick prefabricated wallboard, is convenient and fast for construction, green and environmental protection, and is conducive to prefabricated wallboard installation quality control.

The present invention relates to the technical field of optical crystal repair devices, and discloses a milling repair device for optical crystal surface damage, including a mounting seat, a manual lifting platform is installed on the outer side of the mounting seat, a positioning assembly is arranged on the upper side of the manual lifting platform, an electric slide is arranged on the lower end of the upper side of the mounting seat, a repair assembly is installed on the lower side of the electric slide, and the positioning assembly includes a workbench fixedly arranged on the upper end of the manual lifting platform, a model groove is arranged on the upper side of the workbench, a positioning groove is arranged at the center of the model groove, and a plurality of groups of openings are opened on the inner side of the workbench near the outer circle of the model groove. The milling repair device for optical crystal surface damage described in the present invention avoids direct clamping of the concave and convex sides of the optical lens, which is easy to be damaged, through the coordinated use of the whole, and at the same time realizes clamping of the side edges to avoid side repair work.

The utility model discloses a precise bevel gear rack with improved structure, including head part, tooth piece and tail part, be equipped with a plurality of tooth pieces between head part and tail part, and a plurality of tooth pieces mutually insert and connect, the utility model discloses after connecting tooth piece through head part, the second insert block of tooth piece, second insert post respectively insert into the first insertion slot and the first column slot of another tooth piece, and the second insertion slot of tooth piece, second column slot insert the first insert block and the first insert post of another tooth piece, while the second V type slot of tooth piece and the first V type slot of another tooth piece merge, and after merging, insert the rectangular bolt in the inside, adopt the cooperation of the mortise and tenon structure in bevel gear, so that tooth piece can be replaced alone, avoid the tedious repair work when tooth collapses, increase the service life of whole bevel gear.