2758results about How to "No leakage" patented technology

The invention relates to a 3D printing cement-based material and a preparation method thereof. The 3D printing cement-based material is composed of a powder form gelling material and an aggregate, the powder form gelling material is composed of cement, an active admixture, a water reducer, a hardening accelerator, an adjustable solidification agent, an expanding agent, a binder, an air-entrainer, a plasticity-maintaining agent, a water repellent, starch ether, a powder filling material and fiber, and the aggregate is composed of a fine aggregate and a crude aggregate. Compared with prior art, the 3D printing cement-based material has the advantages of good work performance, constructability performance, mechanical property and endurance performance.

The invention provides a float valve, a pot cover and a pressure cooker. The float valve includes a valve seat (1), a float (2) and a sealing connection part (3), the valve seat (1) is provided with a guide hole (4), and the float (2) is slidably arranged in the guide hole (4), The sealing connection part (3) is arranged on the outer side of the valve seat (1), and the sealing connection part (3) includes a movable part (5) forming a movable space with the bottom of the valve seat (1), and one end of the float (2) stops Blocking the valve seat (1), the other end is sealed and fixedly connected with the movable part (5) of the sealing connection part (3), and the movable part (5) moves together with the float (2). According to the float valve of the present invention, the problems in the prior art that the electric pressure cooker is used for a long time will cause mildew and odor inside the pot cover, and even cause the pot cover to deform.

A low-temperature heating type electronic cigarette heater comprises a heater component, a composite cigarette core and a cigarette holder portion. The composite cigarette core is consumable and cannot be reused, and the other portions are reusable; the composite cigarette core is composed of a core body and a filtering core in a combined manner and fills the heater component, the core body adopts natural plant fibers as the base material and is provided with tobacco aroma substances in an absorbed manner and tea polyphenol microcapsules, and the filtering core is tobacco paper filtering core compounded with bamboo fibers and is prevented from being carbonized during heating; a cigarette holder is connected to the heater component in a sleeved manner; the heater component comprises a connecting component, a supporting seat, a ceramic heating ring and a heat insulating sleeve. The composite cigarette core contacts with the ceramic heating ring in a cylindrical surface manner, the heating area is large, three ways, namely conduction, convection and radiation, of heat transfer during heating are provided, and the heating efficiency is high; the cigarette core releases contained tobacco ingredients through low-temperature heating, the taste is similar to that of a traditional cigarette, and toxics produced in the burning process can be avoided.

The invention relates to a setting phase change energy storage material with high-thermal conductivity and a preparation method thereof, belonging to the field of phase change heat storage materials. The setting phase change energy storage material with high-thermal conductivity is characterized by containing 65-90 percent by mass of paraffin substances as a phase-change material, 9-34 percent by mass of high-density polyethylene as a support material and 1-7 percent by mass of expanded graphite as a heat conduction intensifier; a method for adding a proper amount of expanded graphite to paraffin/high-density polyethylene in a molten state is adopted to enable the heat conductivity of the setting phase change material to be increased to 1.35W/(m.K) or higher. The method comprises the following steps of: heating to melt the paraffin substances with the mass percent of 65-90 percent, and heating to enable the temperature of the liquid paraffin to reach 120-190 DEG C; adding high-density polyethylene with the mass percent of 9-34 percent and the expanded graphite with the mass percent of 1-7 percent to the liquid paraffin, and then melting and evenly stirring in vacuum; putting the mixture in a hot mould for pressing and molding; taking the mixture from the mould after naturally cooling. The setting phase change material has high thermal conductivity, does not need to be packaged in containers and can directly contact heat-transfer media.

The invention provides a method and device for carrying out polymerase chain reaction under a constant-temperature heat source, and specifically relates to a method for providing heat to or taking away heat from a specific area of a reaction test tube based on a Rayleigh-Benard theory to build a temperature gradient from bottom to top of reagents in the reaction tube, spontaneously carrying out convection under the condition that the reaction reagents are unevenly heated, and carrying out corresponding PCR (Polymerase Chain Reaction) amplification when the reaction reagents flow through different temperature areas. The invention also discloses a device for carrying out the reaction of the method and in-time fluorescence detection.

The invention discloses a long tunnel fast construction process. The tunnel construction method in the direction from the entrance to the exit and the tunnel construction method in the direction from the exit to the entrance are the same and each construction section is respectively constructed from back to front. The construction process is as follows: 1, excavating construction at an initial construction section, the process is as follows: performing advance geology forecast, determining the excavating construction method for the current construction section, excavating and primary supporting; 2, excavating construction at the next construction section; 3, repeating the step 2 for multiple times until the construction tunnel is through, wherein in the tunnel construction process, found water seepage areas are timely subjected to draining treatment, and the secondary lining construction is synchronously performed on the tunnel holes formed by excavating from front to back. The long tunnel fast construction method is reasonable in design, simple and convenient in construction, safe in the construction process, short in construction process and fast in construction progress, thus effectively solving the defects and shortcomings such as large equipment investment, long construction period and slow construction progress of the existing long tunnel construction.

The invention relates to a powder laying and recovering device for selective laser melting of a heterogeneous material. The powder laying and recovering device comprises a powder laying device and a powder recovering device; a scrapper plate and a plurality of powder laying grooves are arranged on the powder laying device, wherein the scrapper plate can move in a reciprocating way along a horizontal fixed guide rail; the powder recovering device is provided with an absorbing cover; the absorbing cover can move above a molding cylinder to absorb and move away from an area above the molding cylinder to avoid interference on laser melting molding; a powder recovering pipeline is connected to the upper end of the absorbing cover; un-solidified powder can be absorbed and recovered into a specified recovery box through the control of an opening-closing baffle plate. According to the powder laying and recovering device for selective laser melting of the heterogeneous material, one material is solidified and un-solidified powder is completely removed, then another material is laid to be solidified and absorbed until the whole section of this layer is molded; materials are respectively solidified and absorbed by layers and continuously accumulated and overlapped to form a heterogeneous part. The powder laying and recovering device is applicable to selective laser melting molding of the heterogeneous part; the molding parts of a model can be combined at random.

The invention provides a valve body and bonnet connection torsion dispensing assembly machine, belongs to the technical field of valve production devices and solves problems that the existing valve body and bonnet connection assembly machine cannot achieve automatic gluing. The valve body and bonnet connection torsion dispensing assembly machine comprises a worktable and a support fixed on the worktable, wherein a lower die body is arranged on the worktable, an upper die body is arranged right above the lower die body and is fixed on the lower portion of a torsion control mechanism used for controlling rotating of the upper die body, a lifting cylinder is fixedly connected onto the support, a lifting sliding table is fixedly connected at the end of a piston rod of the lifting cylinder, the torsion control mechanism is fixed on the lifting sliding table, and a dispensing mechanism is arranged on the side portion of the lower die body. The valve body and bonnet connection torsion dispensing assembly machine has the advantages of having double functions of valve bonnet screwing and gluing, being high in automation and work efficiency and the like.

The invention discloses methods for manufacturing and mounting prefabricated wall members, and belongs to the field of technologies for constructing buildings. By the aid of the methods, the problem of low traditional building construction efficiency can be solved, and the traditional production modes with high energy consumption and severe pollution can be changed. The prefabricated wall members are internally provided with reinforcement frameworks and embedded members, and embedded reinforcement holes, grouting holes and exhaust holes are reserved in the prefabricated wall members. The method for manufacturing the prefabricated wall members includes 1), erecting formworks according to the overall dimensions of the prefabricated wall members; 2), placing the reinforcement frameworks and the embedded members in the formworks; 3), preparing and pouring concrete; 4), carrying out steam curing on the prefabricated wall members; 5), stripping the prefabricated wall members from forms; 6), laterally turning the prefabricated wall members and erecting the prefabricated wall members; 7), inserting or butting the prefabricated wall members. The methods have the advantages that buildings can be constructed by the aid of the prefabricated wall members instead of the traditional construction modes, accordingly, implementation of building industrialization can be promoted, energy consumption and garbage discharge can be reduced, the construction efficiency and the construction comprehensive quality can be improved, and collaborative management can be facilitated.

The invention discloses a grinder, in particular a semi-automatic rotary drum grinder mainly used for the deburring, chamfering and polishing and the like of machined parts. The semi-automatic rotary drum grinder comprises a frame (2) on which a bearing supports a drum (10) connected with a driving device and the drum (10) is provided with a cover (13). The semi-automatic rotary drum grinder is characterized in that: one side of the frame (2) is provided with a hoister (24) and a discharge end (28) above the hoister (24) is corresponding to a cutting hopper (23) above the drum (10) on the frame (2). The semi-automatic rotary drum grinder has the advantages of less labor and time, low labor intensity, high operation efficiency and high automation level.

The invention discloses a flame-retardant microcapsule as well as a preparation method and application thereof. The flame-retardant microcapsule comprises a core material and a coating layer coating at the outer side of the core material, wherein the core material is liquid heptafluoropropane or liquid hexafluoropropane; and the coating layer is a polymethacrylate polymer and is prepared by polymerization by virtue of a suspension polymerization method. The flame-retardant microcapsule can be used as a flame-retardant filler singly, and also can be used as a flame-retardant filler together with magnesium hydroxide/aluminum hydroxide for preparing an electronic-pouring sealant in combination. The flame-retardant microcapsule disclosed by the invention is high in thermal stability and good in penetration resistance, and cannot generate leakage of the core material in a normal state; and only when subjected to high-temperature combustion, the coating layer is softened and the liquid core material is vaporized at the same time so that the internal pressure is increased and results in expansion breakage of the coating layer, and then the core material is released at last to quickly retard inflaming and put out a fire, so that the flame-retardant microcapsule has a broad use prospect in the field of preparation of the electronic-pouring sealant.

The invention relates to a shape-stabilized phase change energy storage material for building and a preparation method thereof. The material provided by the invention comprises components of: by weight, 70-85% of a composite phase change energy storage material with its melting point being 18-30 DEG C and 15-30% of gesso. The composite phase change energy storage material with its melting point being 18-30 DEG C is composed of a porous matrix and a mixed fatty acid phase change material, wherein the mass ratio of the porous matrix to the mixed fatty acid phase change material is 1:4-1:6. At the temperature of 60-80 DEG C, the porous matrix is added in the molten lauric acid-capric acid mixed fatty acid to prepare a composite phase change material. Then, gesso is mixed with the composite phase change material to prepare a shape-stabilized fatty acid phase change energy storage material with a more stable adsorption property. The prepared shape-stabilized phase change energy storage material has good thermal conductivity, good adsorption stability and good material plasticity, will not cause seepage at high temperature, is easy to mix with a building material, and has a good application prospect.

The waste type processing method includes three processes of tyre crushing, thermal cracking and carbon black crushing and packing. During the tyre crushing processes, waste type is first-crushed in pre-crusher and washed, and then crushed for the second time into rubber grains below 25 mm size. During the thermal cracking process, the rubber grains are thermally cracked in thermal cracking furnace at 480-700 deg.c and 0.01-0.04 MPa negative pressure, the gaseous product is condensated and cooled in washing tower to obtain fuel oil, the uncondensated light components is reused as fuel gas in the furnace and excessive inflammable gas is for heat energy conversion to provide hot water. In the carbon black crushing and packing process, the mixed material of carbon black and steel wire obtained in the thermal cracking process is magnetic separated and the carbon black is ground and packed as product.

The invention relates to a drip irrigation method for planting cotton in severe saline-alkali land. The method adopts the steps of pre-sowing preparation, capillary laying, drip irrigation, and salt control during growth period. This method does not carry out traditional submerged irrigation in autumn and winter after cotton is harvested. Before cotton is sown, pipes are laid and covered with film to drip water, and drip irrigation under film is used during the cotton growth period. It is aimed at the current situation of decreasing agricultural water consumption. A new water-saving and salt-controlling technology developed is an important supplement to the traditional method of flooding salt irrigation with large water. It has the advantages of less water consumption, good salt washing effect, and high crop emergence rate. The severely salinized areas have great potential for popularization and application.

The composite fixed 76-83 deg C phase change material and its preparation belongs to the field of phase change heat accumulating material technology. The present invention has SEBS of smelting point 76-81.6 deg C as the packing and oil absorbing material and paraffin of phase change latent heat 200-220 kJ/kg as main energy storing material, and consists of paraffin in 66-80 wt%, high density polyethylene in 11-15 wt%, SEBS in 4-12 wt% and expanded graphite in 3-7 wt%. The composite phase change material is prepared through smelting paraffin in a reactor, adding and smelting high density polyethylene and SEBS, adding expanded graphite and mixing homogeneously, molding at 200-300 KPa pressure to form plate, cooling and demoulding. The material may be set directly inside boiler to contact water as heat transferring medium, and after soaking in hot water in temperature above the smelting point for 200 hr, it has weight loss less than 2 % and phase change latent heat change less than 10 %.

The invention discloses a lithium ion battery gel type ionic liquid/polymer electrolyte and a preparation method thereof, relating to a gel type ionic liquid/polymer electrolyte and a preparation method thereof. The invention solves the problem of poor compatibility of the prior imidazole ionic liquid and a lithium ion battery cathode material. The electrolyte is made of a macromoleclar polymer, imidazole ionic liquid and lithium salt. The method comprises the following steps: 1. dissolving the macromoleclar polymer into organic solvent; 2. adding the imidazole ionic liquid and stirring till the solution is uniform; 3. adding the lithium salt to obtain gel liquid; 4. pouring the gel liquid into a die, drying in vacuum and demolding. The electrolyte has favorable compatibility with a lithium titanate cathode; a lithium ion battery made of the electrolyte has high safety, and the lithium titanate cathode presents ultrahigh specific capacity (more than a double of the theoretical specific capacity) and two charging and discharging platforms in the electrolyte. The invention has simple method and technology, low cost and convenient operation.

The invention relates to a construction process for plugging and consolidating a concrete crack through chemical grouting, which belongs to the technical field of concrete consolidation engineering and in particular relates to a concrete crack plugging and consolidating method. The construction process for plugging and consolidating the concrete crack through the chemical grouting comprises the following steps of the first step, opening a V-shaped groove, which is 20 mm wide at the upper part and at least 20mm deep, along the concrete crack; the second step, flushing the V-shaped groove; the third step, plugging the V-shaped groove; the fourth step, drilling a grouting hole; the fifth step, mounting a grouting head; the sixth step, performing grouting; and the seventh step, removing the grouting head. The construction process for plugging and consolidating the concrete crack through the chemical grouting, provided by the invention, is advantaged in that the grouting process is simple and convenient, the operation of the process is convenient, the crack is closely plugged without a gap, the plugged concrete crack is durable and fatigue-proof and not prone to crack again, the concrete crack plugging effect is good, the concrete surface is completely dry, leakage and moist are avoided, the thickness of a plugging and finishing coating on the surface of the crack is uniform, no missed brushing, no base exposure, no peeling, no swelling and no crack are achieved. And moreover, the process causes no pollution to the environment.

The invention discloses a thin-sheet-type self-heating element, a preparation method and an application thereof. The thin-sheet-type self-heating element includes the following components, by weight, 20.0-60.0% of iron powder, 4.0-20.0% of activated carbon, 2.0-6.0% of ultrahigh-molecular-weight polyethylene fiber, 0.5-5.5% of xanthan gum, Arabic gum and carboxymethylcellulose (CMC), 1.0-4.0% of industrial salt, 0.3-1.5% of an anionic surfactant NP-4 and 12.0-28.0% of water. The self-heating element is greatly improved in heating temperature stability, can be prepared into a thin-sheet-type heating element, is free of leakage and is safe, can be widely applied in a body warming patch, a medical operation warming cushion, a medical and health-caring patch, a female menstrual-period dysmenorrhea-alleviating patch, breast caring, medical health caring of lumbar and cervical disease, instruments and meters, and digital product portable heating and the like fields.

The invention relates to a method for producing high quality nickel oxide by controlling crystal growth via nickel complex precipitation and a device thereof. The method comprises the steps of simultaneously controlling pH value, temperature, stirring speed, and the ratio of nickel salt, ammonia and sodium hydroxide; monitoring the 'ternary system' concentration (nickel sulfate (Ni<2+>), sodium hydroxide (OH<->) and ammonia (NH<+>)) in the supernatant in a reaction vessel (on-line system crystal ternary control method) and controlling the concentration range thereof to obtain high-purity sphere precursors of adjustable D50 particle diameter about 1-20 mum with uniform particles and good dispersion; and filtering, washing and calcinating under sealing to obtain high quality nickel oxide. The inventive method has the advantages of no waste gas discharge, improved working environment, ensuring operators in good health, reduced labor intensity, washing and filtering integration, saving a large amount of washing water, low energy consumption, environmental friendliness, and low time and labor consumption; and is superior to the prior washing and filtering method including centrifugation, plate-type filtration and vacuuming.

The invention discloses a gel type ionic liquid/polymer electrolyte for a lithium ion battery and a preparation method thereof, and relates to a gel type ionic liquid/polymer electrolyte and a preparation method thereof. The invention solves the problem of short cycling time of the prior imidazole ionic liquid and electrode material. The electrolyte is prepared from macromolecular polymers, the imidazole ionic liquid and lithium salt. The method comprises: firstly, dissolving the macromolecular polymers into an organic solvent; secondly, adding the imidazole ionic liquid into a mixture, and stirring the mixture until the mixture is uniform; thirdly, adding the lithium salt into the mixture and obtaining a gel liquid; and fourthly, pouring the gel liquid into a die and performing vacuum drying and demolding. The electrolyte has good compatibility with a cathode of lithium titanate; the lithium ion battery prepared by the electrolyte has good safety and stable cycling performance under the condition of different multiplying factors, so as to have long cycling time; and the method has the advantages of simple technique, convenient operation and low cost.