52results about How to "Prevent invagination" patented technology

The invention discloses a hot wall heat exchanger. The hot wall of the hot wall heat exchanger includes an inner support device and a heat exchange partition wall covering the inner support device. section and the upper and lower ends for the left and right circulation of the phase change fluid; the hot wall is rectangular, and several hot walls of the same size are juxtaposed into clusters, or the hot wall is ring-shaped, and several hot walls of different sizes are nested in clusters ; Each adjacent hot wall is provided with channel strips or fins to facilitate the passage of fluid; the fluid side of all channel strips or fins outside the hot wall is divided into multiple regions, which is realized by the phase change fluid in the hot wall Heat exchange of heat exchange fluids. The compactness of the hot wall heat exchanger proposed by the present invention is higher than that of the current heat pipe, and it can be adapted to more heat exchange fields. The variable fluid circulation speed is accelerated, and the heat exchange efficiency is improved.

The invention discloses a preparation method of an essential oil-contained silicon dioxide microcapsule, which comprises the following steps: evenly mixing essential oil, a silicon dioxide precursor and co-emulsifier to obtain an oil phase mixed solution; adding acid into a silicon dioxide water dispersion solution until the pH value is regulated to 4.5-5.7, mixing with the oil phase mixed solution, and performing ultrasonic dispersion to obtain a fine emulsion; and performing closed reaction on the fine emulsion at 10-60 DEG C for 1-6 hours to obtain a colloid emulsion of the essential oil-contained silicon dioxide microcapsule. According to the invention, the liquid essential oil is contained in a hard shell of silicon dioxide; the preparation process is quick, convenient, clean and pollution-free; the essential oil-contained silicon dioxide microcapsule is small in particle size, high in structural strength and favorable in water-phase dispersibility; and the release performance adjustable range of the essential oil contained in the microcapsule is large. The preparation method disclosed by the invention is suitable for industrial large-scale production.

The invention discloses a preparation method of a microcapsule, which comprises the steps of: uniformly mixing silicon dioxide particles, monomer provided with ethylene and silane coupling agent with double bonds, stirring and reacting for 1 to 24 hours under a closed state at the temperature between 40 and 70 DEG C, then adding an oil-soluble cross linker and an oil-soluble initiator, stirring uniformly and then adding a dispersant and de-ionized water to prepare a suspension system, polymerizing for 2 to 6 hours in a nitrogen atmosphere at the temperature between 60 and 80 DEG C with rotating speed of 50-300 rpm, then raising the temperature to 95 DEG C and curing for 1 hour, then carrying out cooling and acid cleaning to obtain composite particles, adding hydrofluoric acid, dipping to remove the silicon dioxide inside the composite particles, then preparing the microcapsule with multi-cavities through neutralizing, washing and drying. The preparation method is easy to obtain materials, has simple technique, has good controllability on the morphostructure of the microcapsule, does not relate to organic solvents and is suitable for industrial production. Moreover, the prepared microcapsule has the advantages of high structure strength, multi-empty cavities and good controllability on the slow-release effect.

The invention discloses a junction box concealed burying accurate positioning method. The positioning method comprises the following steps: 1) measurement line laying, 2) installation and fixing of a threading pipe, 3) processing and manufacturing of a positioning reinforcing steel bar, 4) primary positioning and installation of a junction box, 5) auxiliary fixing of the positioning reinforcing steel bar and accurate positioning of the junction box, and 6) dimension repetition measurement. A position deviation and invagination of the junction box can be effectively prevented; the junction box can be prevented from tilting to the left and the right, and construction quality is improved; and secondary reworking cost generated by scraping and beating at a later stage can be effectively prevented.

The invention discloses an auxiliary assembler for vehicle damping rubber. The auxiliary assembler for the vehicle damping rubber comprises a dust-proof cover and an upper connecting body, wherein multiple lower connecting holes are formed in the lower end of the dust-proof cover in a penetrating mode; two protection tables are symmetrically fixed to the side wall of the dust-proof cover; alarm mechanisms are arranged in the two protection tables; two window grooves are formed in the side wall of the dust-proof cover in a penetrating mode; filter screens are fixed to the inner walls of the two window grooves correspondingly; two pieces of mounting rubber are fixed to the inner wall of the dust-proof cover; and main buffer rubber is fixed to the side walls of the two pieces of mounting rubber jointly. The auxiliary assembler for the vehicle damping rubber provided by the invention has the advantages that by arranging a buffer spring, the upper connecting body can move up and down in the operation vibration process, so that a pressing plate and upper pressing rubber are driven to move downwards, and deformation of the buffer spring is mainly caused in the initial stage of movement; and then low-frequency small-amplitude vibration can be effectively avoided by utilizing the spring characteristics of the buffer spring, so that low-frequency stability which cannot be obtained by conventional rubber cushioning is obtained.

A retrievable stent configured to be positioned across the ductus arteriosus in a pediatric human patient to keep the ductus arteriosus open and ensure adequate blood flow is described. The retrievable stent can include a plurality of 4 to 8 struts that extend from a proximal end connector to a distal end tip, each having a curved proximal strut end, a curved distal strut end and an elongated strut body portion that extends from the curved proximal strut end to the curved distal strut end. When the stent is positioned in the ductus arteriosus, the curved proximal strut ends and the curved distal strut ends engage the ductus arteriosus to provide the radial force necessary to keep the ductus arteriosus open while the elongated strut body portions minimally engage the ductus arteriosus to prevent invagination into the vascular wall and thus allow for subsequent retrieval.

The invention discloses an air impact type treatment method for desertified soil, and belongs to the technical field of soil treatment. According to the method, the characteristics of desertified soil are utilized, embedded balls permeate into the soil on the basis of the mode that the embedded balls are wrapped with a remediation liquid, the embedded balls of different sizes are vertically distributed in the soil in a mode that bigger balls are placed at the top and smaller bags are placed at the bottom under the effect of external vibration, the remediation liquid doped with tartaric acid is used to dissolve isolation materials on the surfaces of the embedded balls, so that the air impact action of the embedded balls is triggered, viscous media are diffused and released to all areas of the soil, the desertified soil is bonded, effective sand-fixing and water-retaining effects on the desertified soil can be achieved based on the hydrophilic characteristic of the soil, and meanwhile, the remediation effect of the remediation liquid is employed, so that the reason of soil desertification is fundamentally solved, and the desertified soil can be efficiently treated within a short time.

The invention discloses a formwork supporting method for a shear wall of a high-rise building. The method is characterized by including a construction joint position outer mould treatment process, a shear wall section control process and an elevator shaft formwork supporting process. Special nuts are embedded in concrete at the roots of construction joints to form reliable anchor points by wire drawing so as to prevent outward expansion of root outer moulds. By special inner side supports for shear wall formworks, the formworks are prevented from recessing inwards, and precision section size of the shear wall is guaranteed. By combination of L-shaped formworks and linear formworks of an elevator shaft and adoption of a lightweight turnover operating platform, the problem of difficulty in mass control of corners of the elevator shaft is solved, and construction efficiency is improved.

The invention relates to a method for forming an aluminum alloy end wall column member for a new-generation high speed motor train unit, belonging to the technical field of bending and forming. In the invention, a die profiling method is adopted and mainly comprises the following steps of: a, filling a cavity; b, positioning a section bar; c, profiling; and d, post-treating. The method specifically comprises the following steps: firstly, filling a continuous chaplet in the lower cavity of the section bar; then starting a hydraulic machine, raising a line segment of a lower die under the action of an ejector rod, horizontally placing the section bar on the line segment of the lower and dropping an upper die slowly so that the section bar is sandwiched between the upper die and the lower die; and then profiling: bending and deforming the section bar so that the section bar gradually fits on the section surface of the lower die, stopping the hydraulic machine, and maintaining a compaction state for a while so that the shape is stable; and finally, taking the section bar out, cutting off allowances at the two ends of the section bar, machining other geometrical characteristics, correcting parts, and clearing the surface so as to obtain the complete end wall column member. By the method, the problems existing in the forming process of the end wall column member of the motor train unit body, such as large section distortion, longitudinal profile size errors and the like, are solved, and the forming precision is improved.

The invention discloses a sealed waterproof jacking mechanism of a movable bearing seat. The sealed waterproof jacking mechanism comprises a working roller seat, a sliding rail seat. a sliding block, a protection cover, a locking block and a power source. The movable bearing seat is arranged at one end of the working roller seat. The sliding rail seat is arranged below the working roller seat, and a sliding groove is formed below the sliding rail seat. The sliding block is arranged below the sliding rail seat and connected with the sliding groove in a sliding manner, and the movable bearing seat is installed on the sliding block. The protection cover is arranged around the sliding rail seat and comprises a front baffle, a rear baffle, a left baffle, a right baffle and a lower baffle, and a hollow cavity is defined among the front baffle, the rear baffle, the left baffle, the right baffle, the lower baffle and the sliding rail seat. The locking block is inserted between the sliding block and the sliding rail seat, and the sliding block and the sliding rail seat are locked by pushing the locking block through slope extrusion fit. The power source is provided with a push rod, and the push rod is located in the cavity of the protection cover. The push rod acts on the locking block and the sliding block so as to drive the locking block and the sliding block to move forwards along the sliding rail seat together and to be kept at the preset position. The protection cover not only plays a waterproof role on the push rod, but also plays a waterproof role on the slide rail seat.