24results about How to "Less destructive" patented technology

The invention relates to a fixing device for bridge group anchors and a construction method, the fixing device for bridge group anchors comprises a plurality of steel strands and anchor bearing plates, and further comprises a mounting frame, the mounting frame comprises a back plate and a plurality of partition plates, the partition plates are fixedly mounted on the back face of the back plate, the partition plates divide the back plate into a plurality of compartments, and round holes are formed in the portions, in the middles of the compartments, of the back plate; and the anchor boxes are fixedly installed in the compartments, and installation parts of the anchor boxes penetrate through the round holes, are located on the front face of the back plate and are suitable for steel strands to penetrate through. According to the fixing device, an installation pipe is fixedly installed on a fixing plate, a steel strand penetrates through the installation pipe, and a pipeline installation hole is formed in an installation part of an anchor box and used for installing the installation pipe in a penetrating mode; the angle of the anchor box is adjusted and fixed when the anchor box is mounted, then the mounting pipe and the steel strand are positioned and fixed, the influence on the mounting angle of the steel strand in the subsequent construction process is avoided, the incident angle of the steel strand can be accurately controlled, and firmness and reliability are achieved.

The application discloses a multi-element time series data privacy protection method based on deep reinforcement learning driving and belongs to the technical field of data privacy protection. The method comprises the following steps: performing dynamic state perception coding processing on multi-element time series data output by a target data source to generate a state representation tensor carrying initial privacy semantics; inputting the state representation tensor into a differential privacy noise injection unit driven by a deep reinforcement learning intelligent agent to output an adaptive noise disturbance signal suitable for the current state representation tensor; superimposing the adaptive noise disturbance signal on the state representation tensor to generate a privacy protection type state representation tensor after noise confusion; inputting the privacy protection type state representation tensor into a multi-layer time series state machine driving unit to extract time series evolution features in the privacy protection type state representation tensor; and performing safe aggregation processing on a plurality of local privacy protection type state representation tensors through a federal aggregation mechanism according to the time series evolution features to generate a global privacy protection state representation tensor.

The present invention belongs to the field of environmental protection, and in particular, relates to a wet flue gas desulfurization system and a wet flue gas desulfurization method. The desulfurization system provided by the present invention includes: a limestone pulping tank, a limestone-gypsum flue gas desulfurization tower, a gypsum slurry separation device, a gypsum dehydration device, a recovery pool, a wastewater separation device, a chemical precipitation device, an advanced oxidation reactor and an external drainage pipeline. The system provided by the present invention can control the LAS concentration in the desulfurization tower at a low level by adding an advanced oxidation reactor and returning the desulfurization wastewater from which LAS is removed by advanced oxidation to the desulfurization tower, thereby eliminating the root cause of the foaming of the desulfurization tower, and then the desulfurization system can operate normally under high chloride ion concentration conditions, that is, realize the high concentration ratio operation of the desulfurization system, and significantly reduce the discharge of desulfurization wastewater. In addition, the COD value of the discharged wastewater of the system is low, which has good environmental benefits.

According to the surface modification method of the sodium-ion battery positive electrode material and the sodium-ion battery positive electrode material provided by the invention, after the positive electrode material is prepared by sintering through a coprecipitation reaction, the sodium-ion battery positive electrode material is subjected to surface modification by using chlorosulfonic acid and liquid nitrogen, so that residual alkali on the surface of the material is eliminated, and moderate surface defects are introduced; active sites are increased, and the electrochemical characteristics of the electrode material are improved. The modified sodium ion battery positive electrode material obtained by the invention has more excellent charge-discharge efficiency and cycling stability, and the method has the advantages of simple process and low cost, and can meet the requirements of large-scale production.

The utility model discloses a battery pack. The battery pack comprises a box body with an accommodating cavity and a cover body which covers the box body along a first direction to seal the accommodating cavity, the circuit board assembly, the isolation piece and the battery cell are sequentially arranged in the containing cavity in the first direction. The accommodating cavity is divided into a first chamber and a second chamber which are sealed with each other by the separator; the circuit board assembly is located in the first cavity, the battery cell comprises a main body and a tab which are connected, the main body is located in the second cavity, and the tab penetrates through the separator and is connected with the circuit board assembly. When the main body is subjected to thermal runaway, sprayed corrosive gas, electrolyte and other impurities are blocked by the separator and only move in the second chamber or break through an air leakage structure of the battery pack, so that the gas, the electrolyte and the like are prevented from rushing into the first chamber; therefore, damage such as gas impact or electrolyte corrosion to the circuit board assembly is avoided, destructiveness during thermal runaway is reduced, and safety is improved.

The present invention relates to the field of fire simulation prediction, and provides a simulation prediction method for extreme explosive fire behavior. The data of flame wall attachment behavior is determined by the flame airflow pressure difference value obtained by experiment, and then based on the flame wall attachment behavior data, it is judged whether the flame meets the critical occurrence condition of explosive fire behavior at the arc surface position corresponding to the detection device. When the critical condition of explosive fire is met at the arc surface position corresponding to the detection device, the arc surface position corresponding to the detection device is used as the critical occurrence position of explosive fire behavior. The present application is based on the flame wall attachment behavior data to judge the critical occurrence condition of explosive fire behavior, and can quantitatively characterize the explosive fire behavior. After obtaining the flame airflow pressure difference value, verifying it can improve the accuracy of the measured parameters, facilitate subsequent data processing and analysis, and provide effective support for the study of explosive fire behavior.

The present application relates to a kind of methods for preparing fluorescent nitrogen-rich carbon quantum dots from coal in aqueous system based on photocatalytic technology, belonging to the technical field of nanomaterial preparation.The method includes pretreatment of coal, ammonia oxidation reaction of coal and ammonia water to obtain nitrogen-rich soluble, the nitrogen-rich soluble is subjected to photocatalytic reaction again, and finally, carbon quantum dot solid powder is prepared by centrifugation, filtration, dialysis and drying treatment.The present application realizes the preparation of fluorescent nitrogen-rich carbon quantum dots from low-rank coal in aqueous system by using ammonia oxidation and photocatalytic technology, and the reaction conditions are mild and green and non-toxic, without harsh reaction conditions such as high temperature / high pressure, strong acid / strong base environment, organic solvent or special equipment.

The invention relates to the field of building repair, and aims to provide a rammed earth wall reinforcing structure which comprises a strip-shaped foundation, a rammed earth wall and a plurality of semi-prefabricated reinforcing units. A plurality of embedding cavities are formed in the front face connecting position and the back face connecting position of the strip-shaped foundation and the rammed earth wall. The embedding cavities at the front surface connecting part and the embedding cavities at the back surface connecting part are sequentially and alternately distributed along the length direction of the strip-shaped foundation; the semi-prefabricated reinforcing units correspond to the embedding cavities in a one-to-one mode, each semi-prefabricated reinforcing unit comprises a concrete embedded block and a steel bar reinforcing cage, the concrete embedded blocks are plugged at cavity openings of the embedding cavities, and cast-in-place combination areas are formed by the concrete embedded blocks and the interiors of the embedding cavities; one end of the reinforcement cage is embedded in the concrete insert block, and the other end of the reinforcement cage extends into the cast-in-place combination area; a grouting opening communicated with the cast-in-place combination area is formed in the lower portion of the concrete embedded block, and grouting materials are poured into the cast-in-place combination area. The rammed earth wall and the foundation thereof can be effectively structurally reinforced, and the original structural features of the rammed earth wall and the foundation thereof are kept.

The utility model discloses a naphtha dechlorination device, which relates to the technical field of dechlorination equipment and comprises a tank body, a mounting shell is mounted at the top end of the tank body, a rotating component is mounted in the mounting shell and comprises a rotating motor mounted in the mounting shell, and the output end of the rotating motor is connected with a first bevel gear. One side of the top end of the first bevel gear is in meshed connection with a second bevel gear, the middle of the second bevel gear is fixedly connected with a first rotating rod, one side of the bottom end of the first bevel gear is in meshed connection with a third bevel gear, the first rotating rod is arranged on the inner wall of the third bevel gear in a sleeving mode and is rotationally connected, and a fixing support is installed on the inner wall of the tank body; according to the utility model, the inner stirring blade and the outer stirring blade respectively rotate in opposite directions by utilizing the rotating assembly to form a complex three-dimensional flow field, and when the inner-layer stirring blade rotates in the forward direction, materials in a central area are driven to quickly circulate, so that a dechlorinating agent is quickly dispersed into a naphtha main body.

The utility model provides a fabric hard package decoration block for a wall surface, which relates to the technical field of indoor decoration and comprises a mounting mechanism, one side of the outer wall of the mounting mechanism is fixedly connected with a decoration mechanism, and the mounting mechanism comprises a fabric hard package decoration plate main body. According to the utility model, under the cooperation of the mounting mechanism, the mounting groove is formed in one side of the inner wall of the fabric hard package decorative plate main body, so that the first fixing strip and the second fixing strip can be mounted in the mounting groove, the plates can be conveniently connected and fixed, and the size of a splicing gap is reduced; the first fixing plate is installed on one side of the inner wall of the fabric hard package decorative plate body, the clamping block is installed on one side of the outer wall of the first fixing plate, the clamping block is clamped in the connecting block installed on one side of the outer wall of the second fixing plate to be fixed, the stability of plate installation is enhanced by installing the fixator, and disassembly and installation are convenient; the damage to the wall body and the decorative block is small, and the operation is convenient.

The utility model discloses an embodiment relates to the technical field of connector, especially discloses a kind of connector and electronic equipment, including insulating body, terminal assembly, lock catch assembly, elastic member and linkage assembly, insulating body is provided with slot and first connecting groove, slot is used for electronic card insertion, terminal assembly is set to insulating body, lock catch assembly includes lock catch piece, lock catch piece is provided with first connecting part, first connecting part is movably inserted in first connecting groove, so that lock catch piece can move along first direction and second direction, elastic member is supported in insulating body and lock catch piece, linkage assembly includes linkage piece and ejector, linkage piece is movably set to insulating body, one end of linkage piece is movably connected with lock catch piece, ejector is rotatably set to insulating body, part of ejector is set to slot, and the other end of ejector is movably connected with linkage piece. By the above-mentioned mode, the utility model embodiment realizes that connector lock card is firm.

This utility model relates to the field of impact resistance technology for rocket launch pads, specifically a reinforced pad for improving the impact resistance of rocket launch pads. It includes a deformable energy-absorbing thin layer, a hollow lattice support layer, and a damping rubber buffer cover layer arranged from top to bottom. The deformable energy-absorbing thin layer, the hollow lattice support layer, and the damping rubber buffer cover layer are all circular and concentrically arranged, with their centers located at the impact center of the rocket launch. The deformable energy-absorbing thin layer primarily absorbs impact energy, reducing the destructive impact on the site; the hollow lattice support layer mainly serves as a stress diffusion layer, compensating for insufficient site bearing capacity; the damping rubber buffer cover layer primarily buffers the impact force on the launch pad and suppresses the fragmentation of local pavement debris by covering it. This reinforced pad for improving the impact resistance of rocket launch pads has the advantages of convenient and quick implementation, strong impact resistance, and minimal damage to the site.

The invention discloses a coal rock in-situ porosity testing device and method, and the device comprises a support which is provided with a vertical slide rail; the sliding table is arranged on the sliding rail of the bracket in a sliding manner; the drilling barrel is rotationally connected to the lower portion of the sliding table; the inner pipe is rotationally connected into the drilling barrel, and an air inlet hole is formed in the side wall of the upper portion of the drilling barrel; the upper end of the inner pipe penetrates to the position above the drilling barrel, and an air outlet hole is formed in the side wall of the upper portion of the inner pipe. The driving motor is arranged on the sliding table and used for driving the drilling barrel to rotate; the vacuum pump is arranged at the bottom of the support, the gas inlet hole is connected to a gas supply device, and the gas supply device can provide calibration gas; the air outlet hole is connected to the vacuum pump; compared with the prior art, errors possibly introduced in the processes of sample collection, transportation and laboratory treatment are avoided, so that the test precision is improved.

This invention provides a tunnel-type garment smoothing machine, belonging to the field of garment smoothing technology. It includes a housing with through slots at both ends, forming a smoothing channel between the slots. A steam ironing component and a drying component are installed within the smoothing channel. A conveyor component runs through the smoothing channel, passing sequentially through the steam ironing and drying components to smooth the garments. This invention uses a conveyor component to guide the garments through the smoothing channel, and the steam ironing and drying components, sequentially arranged within the channel, achieve steam smoothing and drying of the garments. Compared to tumble drying, this method causes less damage to the garments, and the entire process is friction-free and undamaged.

The utility model discloses a seismic mitigation and isolation support with a double-damping energy dissipation function. A traditional shock absorption and isolation support is poor in shock absorption effect and complex in replacement process. The support comprises an upper support plate, wherein a spherical crown lining plate is arranged below the upper support plate; a plane sliding friction pair is arranged between the upper support plate and the spherical crown lining plate; a sliding plate is arranged below the spherical crown lining plate, and a spherical sliding friction pair is arranged between the spherical crown lining plate and the sliding plate; a lower support plate is arranged below the sliding plate, and a plane sliding friction pair is arranged between the sliding plate and the lower support plate; and the sliding plate is connected with the lower support plate through a spiral steel damping element. The force borne by the support acts on the spiral steel damping element connected with the support, steel damping and friction damping energy consumption is achieved, earthquake loads are buffered, and damage to the support is reduced.

The utility model discloses a lossless and pollution-free silicon carbide particle mixing device and relates to the technical field of silicon carbide crystals. Comprising a magnetic oscillator, a mixing grid plate, a base and a cylindrical side wall with upper and lower openings, the base is adsorbed on the magnetic oscillator; the multiple cylindrical side walls are sequentially stacked on the base from bottom to top, and the cylindrical side walls are detachably connected with the base and detachably connected with the base. A material mixing grid plate is placed at the insertion port of each cylindrical side wall, a gap exists at the joint of every two adjacent cylindrical side walls, and SiC powder and a doping agent are placed on the material mixing grid plates; the particle size of the SiC powder and the particle size of the doping agent are both larger than the mesh aperture of the mixed material mesh plate; the silicon carbide powder mixing device can realize lossless, efficient and pollution-free mixing of silicon carbide powder, and improves the consistency of substrates.

The invention discloses a spine anterior structural bone grafting internal fixing device which comprises a fixing sheath and a steel nail set, the steel nail set is arranged in the fixing sheath and comprises a first fixing nail, a second fixing nail and a third fixing nail, the top of the first fixing nail is connected with a bent first connecting arm, and the top of the second fixing nail is connected with a bent second connecting arm. The top of the second fixing nail is connected with a bent second connecting arm; a convex ring on the inner wall of the fixing sheath is sleeved with an adjusting piece for adjusting the telescopic length of the first connecting arm and the second connecting arm in a clearance fit mode, and a locking piece is arranged above the convex ring; the third fixing nail is arranged in the through hole of the fixing sheath, a pressing block is arranged on the top face of the third fixing nail, and the locking piece is pressed between the protruding ring and the adjusting piece through the pressing block. After the whole structure of the device is combined, the stability is good, and a bone grafting block is firmly fixed; and secondly, the device is light and thin in structure and small in volume, so that a wound needing to be formed is small, bleeding is little, damage to bones is small, and trauma in an operation or after the operation is reduced.

The utility model discloses a rapid test tool for a vehicle control unit, which comprises a test tool main body, a BOB board is arranged on the test tool main body, a BOB board layout is arranged in the BOB board, a plurality of banana seats are arranged on the BOB board, PIN connectors are further arranged on two sides of the BOB board, the PIN connectors are respectively connected with a tool wire harness and a BOB product wire, and the tool wire harness and the BOB product wire are respectively connected with the BOB board layout. And the other end of the tool wire harness and the other end of the BOB product line are respectively provided with a vehicle controller wire harness PIN connector and a vehicle controller PIN connector, so that the test tool main body is arranged between the vehicle controller wire harness and the vehicle controller. According to the rapid test tool for the vehicle control unit, a section of test tool is connected between the vehicle control unit and the wire harness of a real vehicle, damage to the wire harness on the real vehicle is reduced through a mode of carrying out line modification on the tool, and compared with traditional direct modification on the real vehicle, the rapid test tool for the vehicle control unit is more convenient to operate and looks clearer.

The invention discloses a method for reducing the peroxide value of phospholipid through reverse phase chromatography, which comprises the following steps: (1) carrying out gradient elution by taking a low-carbon alcohol solution of phospholipid as a sample, adopting a reverse phase silica gel chromatographic column, taking the low-carbon alcohol as a mobile phase A and taking water as a mobile phase B, detecting the wavelength of 250nm, and collecting a low-POV component; and (2) removing the solvent from the low-POV component to obtain the phospholipid product with reduced peroxide value. The method is simple and convenient to operate, can effectively reduce the peroxide value in phospholipid, and is suitable for industrial production.

The utility model relates to the technical field of alarm equipment, in particular to a portable electric shock prevention early warning device for an electrified body. Comprising a device body, a suction cup frame and a mounting assembly, the mounting assembly comprises a guide rod, a spring, a limiting ring, clamping plates, a limiting sliding plate, a locking component and an auxiliary component, during mounting, the locking component is directly loosened firstly, then the clamping plates are pulled to be away from each other, the device body is further placed between the clamping plates, and the clamping plates are loosened; after the external force disappears, the spring is converted from the compressed state to the released state and pushes the clamping plates to abut against the shell of the device body, finally, the locking component is screwed tightly, and when the device is taken down, the clamping plates are directly pulled to be away from each other after the locking component is loosened, and the device body can be loosened. Compared with traditional bolt connection or buckle connection, the installation structure has the advantages that damage to the shell of the device body is smaller, damage to the shell can be reduced when the device body is installed or detached, and the safety of maintenance is improved.

The invention relates to the technical field of soil remediation, in particular to a soil remediation agent for petroleum-contaminated soil and a preparation method of the soil remediation agent, and aims to solve the problem that existing petroleum-contaminated soil is difficult to naturally remedy. According to the preparation method, the polluted soil is repaired by utilizing a bioremediation method, the advantages of high efficiency, good effect and small environmental damage are achieved by adding florae into the polluted soil to remove petroleum hydrocarbon pollutants, the candida tropicalis and the streptococcus faecalis are adopted for composite treatment, the candida tropicalis has the advantages of high permeability resistance, acid resistance and high metabolism efficiency of fungi, and the streptococcus faecalis and the candida tropicalis have the advantages of being high in metabolism efficiency. Streptococcus faecalis can be degraded by the petroleum hydrocarbon, pseudomycelium and spores can be generated, an extended network structure is formed in soil and can be used as a channel for bacterial migration, bacterial migration is facilitated, the treatment effect on pollutants is improved, streptococcus faecalis can grow in the environment with the petroleum hydrocarbon, the degradation effect on the petroleum hydrocarbon is good, and the degradation effect on the petroleum hydrocarbon is good. By compounding the two components, a good biodegradation effect can be achieved.

The invention relates to the field of rock drilling, in particular to an underground engineering surrounding rock directional drilling and slotting method based on stress transfer, which comprises the following steps: S1, carrying out directional drilling operation on underground engineering surrounding rock, arranging a drill hole at a position s meters away from an underground engineering outline, s = (1 + / -10%) (rp-r0), rp is the radius of a loose circle of the underground engineering, and r0 is the equivalent radius of the underground engineering; and S2, directional slotting operation is conducted on the underground engineering surrounding rock based on the drilled hole, a slot is arranged to be perpendicular to the main stress direction of a surrounding rock crustal stress field, and a stress transfer path is cut off. According to the method, the continuity and the stress transfer path of the protolith are changed through a gap formed by protolith directional drilling and hydraulic directional slotting. Under the action of high ground stress, primary rock stress can be redistributed around drill holes and gaps, the surrounding rock load acting on underground engineering is reduced, stress distribution can be adjusted in a targeted mode, excessive damage to shallow surrounding rock is avoided, and the self-bearing capacity of the shallow surrounding rock is reserved to the maximum extent.

This invention belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-butyl peroxide. An alkaline solution is added to acetic anhydride, and the mixture is stirred to obtain a reaction solution. A composite catalyst is added to a purified tert-butyl hydrogen peroxide solution, and the mixture is stirred to obtain a mixture. The reaction solution is added to the mixture, and the mixture is stirred to obtain an organic phase. The organic phase is acid-washed to obtain an oil phase. The oil phase is then alkali-washed, salt-washed, and freeze-dried to obtain tert-butyl peroxide. This invention purifies the tert-butyl hydrogen peroxide solution, effectively removing di-tert-butyl peroxide impurities. A composite catalyst composed of p-toluenesulfonic acid, perfluorosulfonic acid resin, and sulfonated carbon is used as the catalyst, reducing the destructive effect on the product tert-butyl peroxide and significantly improving the yield of tert-butyl peroxide, thus possessing industrial production significance.

The application discloses a process method of sand blasting before machining for high-quality and high-efficiency machining of hard and brittle materials, and belongs to the technical field of precision machining of hard and brittle materials. In view of the problems of easy edge collapse, cracks and low machining efficiency of hard and brittle materials in cutting, sand blasting treatment is performed on the surface to be machined of a workpiece before mechanical cutting machining, a uniform micro-crack damage layer is formed in a controllable manner on the material surface layer by using the impact of high-speed abrasive particles, and the bonding strength of the surface layer is weakened; subsequent cutting machining is then performed, so that the material is mainly removed in brittleness and secondarily removed in ductility, the cutting force and tool wear are significantly reduced, defects such as edge collapse and cracks are inhibited, and the machining surface quality and machining efficiency are improved. The process is simple and has strong adaptability, and can be widely applied to the precision and high-efficiency cutting machining scenes of various hard and brittle materials such as ceramics, monocrystalline silicon and sapphire.