55results about How to "Easy to modify later" patented technology

The invention provides a pre-fabricated assembled steel structured residential cable and electric wire laying system and a construction method therefor, and specific to the problem of inconvenient post modification caused by the fact that the existing cable through pipe is prefabricated in a wall, and the problem of difficulty in mounting space reduction caused by relatively large laying radius due to through pipe laying. The system comprises a plurality of hydroelectric wall boards and a plurality of cables; vertical branch wire slots used for laying the cables are formed in the hydroelectric wall boards; the cables are fixed in bunches through a plurality of clamps; the clamps are glued in the vertical branch wire slots, so that construction is convenient; the upper ends of the cables walk in a suspended ceiling along a top plate to an indoor power distribution box while the lower ends of the cables are connected with corresponding sockets or switches respectively; the cables are laid in the hydroelectric wall boards, so that post modification or maintenance can be convenient; the cables are fixed in bunches through a plurality of clamps without adopting a pipe through laying way, so that the laying radius can be reduced and the mounting space can be saved; in addition, a power distribution room is connected with each indoor power distribution box in a radiative power supply way, so that direct power supply can be realized after assembling in each layer is completed, and temporary power utilization application can be reduced.

The invention provides a latticed shell structure and wind-resistant truss column connection structure, comprising a horizontal steel beam, a latticed shell lower chord ball joint, a first connection component and a second connection component; the latticed shell lower chord ball joint is mounted on a latticed shell lower chord layer of a latticed shell structure and is connected with the horizontal steel beam through the first connection component, the horizontal steel beam is connected with the wind-resistant truss column through the second connection component, the first connection component comprises a first connector and a second connector connected with each other, the first connector is provided with a vertical elliptical hole, the second connector is provided with a round bolt hole, the second connection component comprises a third connector and a fourth connector connected with each other, the third connector is provided with a horizontal transverse elliptical hole, and the fourth connector is provided with a vertical elliptical hole. The connection structure of the invention has the advantages of simple form, clear force transmission path, good safety and reliability, reduced joint construction difficulty and facilitated late reformation and extension.

The invention provides a vibration reduction device subjected to strong intervention, and belongs to the technical field of automobiles. The vibration reduction device subjected to strong interventioncomprises a damping cylinder and a vibration reduction spring. The vibration reduction spring sleeves the damping cylinder. The vibration reduction spring is a hollow spring, and a damping hole is formed inside the vibration reduction spring. Multiple first wires are arranged in the damping hole in a passing mode, and the first wires are connected in parallel and then connected with a second wire. A pressure adjusting piston is connected with the upper end of a liquid storage cavity in a sliding mode. An armature block which is located above the pressure adjusting piston is fixedly arranged on an upper installation base, and the second wire is wound around the armature block in the same direction. A first permanent magnet strip is embedded into the pressure adjusting piston, and the magnetic pole direction of the first permanent magnet strip and the magnetic pole direction of an electromagnetic structure which is formed after the second wire on the armature block is energized are located on the same straight line. A permanent magnet set comprises multiple second permanent magnet strips which are uniformly distributed outside the axis of a cylinder body in the circumferential direction. The damping hole and the liquid storage cavity communicate with each other through a liquid outlet channel, and the pressure adjusting piston partially covers the liquid outlet channel when thevibration reduction spring is located in the initial state. The vibration reduction device subjected to strong intervention has the advantage that the rigidity of the vibration reduction device can beadjusted in a self-adaptation and high-strength mode.

The invention provides hydrophobic sponge loaded with carbon nanotubes, a preparation method and application of the hydrophobic sponge, which belong to the technical field of oil-water separation. Firstly, polyurethane sponge isoxidized by using a H2O2 / H2SO4 mixed solution, so that the number of hydroxyl groups of the polyurethane sponge is increased, and the polyurethane sponge is convenient to modify; a silane coupling agent is utilized to realize combination of polyurethane sponge and hydroxylated carbon nanotubes, and specifically, hydroxyl groups of the polyurethane sponge and hydroxyl groups of the hydroxylated carbon nanotubes react with the silane coupling agent to obtain the hydrophobic sponge loaded with the carbon nanotubes. On one hand, the carbon nanotubes can increase the roughness of the surface of the polyurethane sponge and improve the hydrophobicity of the polyurethane sponge, so that the oil-water separation efficiency is improved; meanwhile, the carbon nanotubes can also improve the oil absorption rate of the polyurethane sponge, so that the oil absorption efficiency is improved; in addition, long-chain alkyl of the silane coupling agent is grafted to the polyurethane sponge, the hydrophobicity of the polyurethane sponge can be further improved, and then the oil-water separation efficiency is improved.

The invention discloses a numerical prediction method of the flow-induced noise of a centrifugal pump. The invention provides a numerical prediction method of the flow-induced noise of a centrifugal pump by calculating the sound source characteristics of the flow noise on the basis of the test results of the performance test of the centrifugal pump. Moreover, this method can better overcome the shortcomings of the traditional calculation method that does not consider the influence of the pump body structure on the sound propagation and ignores the broadband noise of the eddy current. Applying the analysis of the internal flow of the centrifugal pump and the calculation results of the far-field noise value to the low-noise hydraulic design of the centrifugal pump can reduce the number of tests, shorten the development cycle, save development costs, and effectively improve the design quality of the centrifugal pump; fluid grid and acoustics The interpolation method between the grids can preserve the sound source information of the flow field calculation to the greatest extent; the GREEN analysis can be used to obtain the contribution of different parts of the shell to the noise. Research on this can be used for the preliminary design or Post-modification for optimization.

The invention provides a low-temperature radiant air-conditioning module wall based on capillary network structure, which comprises organic glass veneer panels, connecting pillars, PE-RT pipes, welded steel wire mesh, aluminum foil reflective film, thermal insulation layer, and structure arranged in sequence from the surface to the inside. Layers and mounting brackets, the plexiglass veneer has several openings, the plexiglass veneer is supported by the connecting pillars to form a 1-3mm thick space, and the PE-RT tube is arranged in this space, and the PE-RT tube adopts the in-line type PE-RT Tube, PE-RT tube circulates heat medium, heat medium relies on circulation equipment to provide kinetic energy, aluminum foil reflective film is arranged under the welded steel mesh and the insulation layer controls the radiation direction of PE-RT tube to be unidirectional. The module wall has a high heat conversion rate, good indoor thermal comfort, and can be closely combined with the building wall without occupying the indoor space. It meets the requirements of the building modular system, and can be prefabricated and the number can be increased or decreased according to actual needs to control the indoor temperature rise. Effect.

The invention provides a combined rail vehicle machining fixture, which includes a floor machining fixture, a roof welding overall machining fixture, a long and large material machining fixture and a beam platform. The whole tooling is composed of 20 unit modules. Units 1-4 are composed of 5 small modules at the beginning, and other unit modules are composed of three small modules. The small T-slot module in the middle is responsible for the support and clamping of long and large-scale machining. , and can meet the profile processing of different sections by changing the support module. The small fixture modules on both sides of the T-shaped slot are mainly used for the overall machining of the roof after welding. The invention is easy to operate and accurate in positioning, solves the trouble of lifting and transporting the tooling back and forth, improves the utilization rate of the machine tool, overcomes the problem of insufficient flexibility in the layout of the existing subway vehicle machining process, ensures the progress of the project, and the flexible design It makes the tooling convenient for later transformation, and only needs to modify the simple support and compression module to adapt to the production of different types of products.

The invention discloses a modeling method for a modular splicing type complex terrain. The modeling method comprises the following steps that S1, firstly, modular modeling single bodies are manufactured for later use; S2, according to the specifications of the modular modeling single bodies, high-precision grid interpolation is carried out on the complex terrain; S3, elevation coordinates of the modular modeling single bodies are locked, and numbering is carried out on each modular single body; S4, sand filling is conducted; S5, plastering is conducted; S6, after the construction of the original terrain is completed, simulating is carried out on the building, and lofting and construction of the building are carried out according to the mark points which are embedded in advance; and S7, after the building is completed, model manufacturing is basically finished. The modularized modeling single body is used so that accurate simulating can be carried out on the complex terrain, the height of the terrain can be accurately simulated through telescopic scales, and therefore the model manufacturing precision can be greatly improved, and the model manufacturing speed can be greatly improved; and a modular splicing mode is adopted, and after numbering is carried out on each module, the modules can be assembled at any place and are not limited by places.

The invention relates to the technical field of indoor decoration, in particular to a magnetic type suspended ceiling. The magnetic type suspended ceiling comprises suspenders, keel assemblies and a panel, wherein one ends of the suspenders are connected with a wall body, the other ends of the suspenders are provided with magnetic attraction devices connected with the keel assemblies, each keel assembly comprises a first keel attracted with the magnetic attraction device and a second keel connected with the first keel and the panel, and the first keels and the second keels are connected in an inserted mode. By designing the magnetic attraction devices and the keel assemblies, screws are not needed in the suspended ceiling mounting process, the tedious dismounting and mounting steps such as nailing are avoided, the dismounting and mounting efficiency is improved, and meanwhile, the situation that the suspended ceiling is damaged and waste is caused when the suspended ceiling is dismounted is avoided.

The invention discloses a detection method for high-precision detection of volatile organic compounds, which comprises the following steps of preparing a cerium-doped mesoporous molecular sieve, sequentially carrying out aminopropyl modification, perylene-3, 4, 9, 10-tetracarboxylic dianhydride grafting and octadecyl mercaptan modification on the cerium-doped mesoporous molecular sieve, and packaging to obtain a volatile organic compound detection film, and establishing a standard curve between the concentration of the volatile organic compounds and the fluorescence intensity of the detectionfilm by utilizing the fluorescence intensity difference of the detection film to the volatile organic compounds with different concentrations, so that the high-precision detection of the volatile organic compounds is realized. In the way, the rich pore structure in the molecular sieve can be used to efficiently adsorb and desorb the volatile organic compound, the perylene-3, 4, 9, 10-tetracarboxylic dianhydride is taken as a substrate, quantitative detection of the volatile organic compounds is realized by utilizing the fluorescence effect of the perylene-3, 4, 9, 10-tetracarboxylic dianhydride, and the sensitivity, accuracy and stability of detection are effectively improved by combining the synergistic effect of all groups, so that the application range is relatively wide.

The invention relates to a cubic carbon material from hemicellulose and a preparation method thereof, wherein the preparation method comprises the following steps: 1) cutting shaddock peel into pieces, washing and drying the shaddock peel pieces, and grinding the shaddock peel pieces into powder to obtain shaddock peel powder; 2) adding the shaddock peel powder into an alkaline solution, uniformlystirring and filtering the mixture, and collecting the supernatant; 3) adjusting the supernatant to be neutral, mixing the supernatant with ethanol, performing centrifugal washing, and drying the liquid to obtain a hemicellulose precursor; and 4) mixing the hemicellulose precursor with an activating agent, and calcining the precursor at high temperature to obtain the cubic carbon material. Compared with the prior art, the preparation process is simple, the carbon material is directly synthesized through a one-step method, energy conservation is facilitated, the prepared biomass-based carbon electrode material is of a regular cubic structure, subsequent modification and other operations are facilitated, the raw materials are extracted from biomass waste shaddock peel, the cost is low, andthe application prospect is wide.