10results about How to "Good for deformation control" patented technology

This invention discloses a double-row pile retaining structure for foundation pits and its construction method, aiming to provide a double-row pile retaining structure for foundation pits with good deformation control, strong resistance to earth pressure, and high stability. A double-row pile retaining structure for foundation pits includes: a front row of piles, which are set in the soil; a front row of pile capping beam, with the top of the front row of piles connected to the front row of pile capping beam; a rear row of piles, which are set in the soil, with the front row of piles located between the rear row of piles and the foundation pit; a rear row of pile capping beam, with the top of the rear row of piles connected to the rear row of pile capping beam; a tie beam, connecting the front row of pile capping beam and the rear row of pile capping beam; and lapped steel sections, which are inserted into the soil, the lapped steel sections are inclined, the lower end of the lapped steel sections is connected to the rear row of piles, and the upper end of the lapped steel sections is connected to the tie beam or the front row of pile capping beam.

This invention discloses a synchronous grouting material for high-water-pressure ultra-large shield tunnels and its preparation method, belonging to the technical field of cement-based materials. The synchronous grouting material for high-water-pressure ultra-large shield tunnels consists of two components, A and B. Component A is cement slurry, including cement, bentonite, highly active mineral admixtures, viscosity modifiers, stabilizers, and water; component B is a water glass solution. The volume ratio of component A to component B is 10–13:1. The synchronous grouting material of this invention has good water dispersibility, slow gel time, fast setting time, and high water erosion resistance. The gel time and setting time of the slurry are controllable and adjustable, avoiding slurry blockage and quickly and effectively filling the gap between the tunnel segments and the surrounding soil. Simultaneously, the slurry exhibits good cohesion in water-rich environments and is not prone to segregation and dispersion, meeting the performance requirements of synchronous grouting materials for high-water-pressure, ultra-large-diameter shield tunnels.

The utility model relates to a kind of filter screen mounting structure and railway vehicle air conditioner, including rectangular filter screen frame, the filter screen frame is inserted into card slot and is installed, at least the spring piece is installed on the side of the filter screen frame, the fixation between card slot is realized by the deformation of the spring piece, the both ends of the spring piece have mounting hole for being fixed with filter screen frame by fastener, the middle body part of the spring piece is composed of three bending, three segment shape is W-shaped as a whole, there are two downward recessed accommodating cavities on the filter screen frame, the two bending points of the bottom of the spring piece respectively sink into corresponding accommodating cavity after deformation downward.This utility model can make filter screen disassembly more smooth, spring piece is not easy to damage, can improve the maintainability and reliability of product.

This invention discloses an additive manufacturing-based inertial amplification nonlinear low-frequency vibration isolation metamaterial structure, vibration isolation device, and its performance control method. The vibration isolation metamaterial structure includes a rhombic frame structure, an inertial amplification unit, and a square spring structure. The square spring structure is arranged within the rhombic frame structure, with its two ends connected to a pair of opposite corners of the rhombic frame structure. The elastic extension direction of the square spring structure is parallel to the diagonal of this pair of opposite corners of the rhombic frame structure. The inertial amplification unit has a centrally symmetrical structure, including a rigid rod, two counterweights, and two diagonal rods. The center of symmetry of the inertial amplification unit, the center of the rhombic frame structure, and the center of the square spring structure all coincide in projection. Therefore, the vibration isolation metamaterial structure of this invention significantly widens the bandgap range and enhances low-frequency vibration isolation performance, exhibiting excellent performance in suppressing longitudinal waves in the 0-1000Hz low-frequency range, increasing vibration damping, and energy absorption.

This invention relates to the field of feeder terminal technology, specifically to a feeder distributed automated power distribution terminal, comprising a main control unit and a data acquisition unit. The data acquisition unit is electrically connected to an external control cable. The main control unit is equipped with a support base, on which a square guide rail is fixedly mounted. A sliding frame is mounted on the guide rail, and the sliding frame has a square guide groove for threading through the guide rail. A probe is fixedly mounted on the sliding frame. An elastic body is fixedly mounted on the sliding frame, with its other end fixedly connected to a protective cap. The protective cap has a detection hole for threading the probe. This invention solves the problem of existing distributed feeder terminals being easily damaged during wiring due to exposed probes.

The invention discloses a corrugated sandwich bidirectional energy absorption structure and a design method. The corrugated sandwich bidirectional energy absorption structure comprises a unit composed of periodic corrugated curved walls and a sandwich body composed of an upper panel and a lower panel. Controllable buckling and multi-stage collapsing of the corrugated wall plate in the loading process are achieved through preset curvature, a node transition structure and wall thickness distribution. Independent but mutually coupled energy dissipation paths are formed in the units in the two main directions, so that the structure can keep a stable energy absorption mode under the working conditions of compression, shearing and composite impact; according to the structure, a partition triggering mechanism, local plastic hinge control and a shape constraint effect are introduced in design, specific energy absorption, platform stress stability and structure failure resistance are remarkably improved, the structure can be widely applied to traffic equipment collision prevention, aerospace protection, electromechanical equipment buffering, building disaster reduction and other scenes, and light weight and efficient energy absorption are both achieved.

The present application belongs to the technical field of welding manufacturing of large steel structure, and particularly relates to a multi-layer and multi-pass full penetration welding process for a right-angle structure. The welding process comprises the following steps: cutting a double-sided asymmetric groove on a rib plate, one side of which is a large groove and the other side is a small groove, and polishing the groove; fixing the rib plate and a spoke plate on the small groove side by using a process triangular plate; welding the rib plate and an outer ring as well as the spoke plate, the rib plate and the spoke plate being welded as horizontal welding, and the rib plate and the outer ring being welded as vertical welding, and removing the process triangular plate; and performing non-destructive testing and annealing heat treatment on the weld. The welding process reduces labor intensity, improves the working environment, and ensures the stability and consistency of the welding quality.

The application provides a large-span under-hanging arc-shaped steel truss construction method, which comprises the following steps: firstly, a three-dimensional model is established and construction condition simulation is performed to optimize structure design; then, an adjustable arc-shaped assembling jig frame is erected on the ground, arc-shaped main steel truss assembling is completed on the arc-shaped assembling jig frame, a boom, a conversion beam and an under-hanging structure are installed to form an integrated whole lifting unit; then, a hydraulic synchronous lifting system is installed on the top of a bearing steel column to perform graded lifting and monitoring, and is fixed and installed after lifting in place; finally, graded unloading and structure monitoring are performed, and subsequent structure construction and completion acceptance are performed. The application adopts ground arc-shaped jig frame whole assembling, and the arc-shaped truss is formed at one time, so that linear precision is high, deviation is small, large-area full scaffold is cancelled, materials are saved, space is released, multi-specialty cross operation can be realized, high-altitude operation is greatly reduced, safety risk is reduced, construction efficiency is improved, structure stress is ensured to be uniform, deformation is controllable, and construction quality is stable and reliable.

The invention relates to an irradiation treatment system for local modification of a semiconductor, and belongs to the technical field of semiconductor processing. The irradiation treatment system for local modification of the semiconductor comprises a bearing table, a shielding mechanism, a positioning detection assembly and a control module, wherein the bearing table is used for bearing and fixing a semiconductor wafer; the shielding mechanism comprises a shielding plate and a driving assembly, and a radiation opening is formed in the shielding plate; the surface, facing the radioactive source, of the wafer is a processing surface; the edge position of the shielding plate is fixed, and the driving assembly is connected with the center point of the shielding plate and drives the center point to ascend and descend in the axial direction, so that the shielding plate generates elastic deformation to form an arc-shaped surface; the positioning detection assembly is used for detecting contact between the shielding plate and the machining face. The control module controls the center point of the shielding plate to ascend and descend according to the contact signal, so that the arc-shaped face shape of the shielding plate is matched with the arc-shaped shape of the machining face. According to the irradiation treatment system for semiconductor local modification, the reliability and the yield of a semiconductor local modification process can be improved.

The invention provides a thick-plate narrow-gap titanium alloy double-sided swing laser powder feeding additive process method, which is used for completing high-quality joint of titanium alloy plates with the thickness of 50mm and thicker and eliminating the defects of incomplete fusion, air holes, cracks, oxidation and the like. Welding deformation is reduced, the process stability is improved, and the problems of low efficiency and welding material waste caused by multi-layer and multi-pass traditional surfacing are solved; the heat input and the production cost are reduced, the production period is shortened, and meanwhile it is guaranteed that the mechanical property of a jointed structural part is superior to that of base metal. Through the integrated design of special device customization, accurate parameter matching and double-face symmetrical material adding, the design of a special symmetrical inverted trapezoidal groove, the design of an extensible red copper powder feeding pipe, the design of an extensible material adding protection cover and sectional type accurate process parameter matching are adopted.