56results about How to "Enough durability" patented technology

A temporary soil sheathing apparatus supports a set of intermediate bracing beams in a triangular supporting structure during pit excavation work for constructing an underground structure, so that it can satisfactorily support soil pressure. Thus, it is possible to prevent space from being reduced by a complicated supporting structure, reduce construction costs through reduced use of materials, and increase work space to improve productivity. The temporary soil sheathing apparatus simplifies a corner connecting structure, and reinforces ability to withstand the soil pressure transmitted from the bracing beams and wales. Thereby, it is possible to prevent space from being reduced by a complicated supporting structure, reduce construction costs through reduced use of materials, and increase work space to thus improve productivity.

The invention relates to a thermal insulation compound wall body of a dry hanging keel decoration plate and a construction method, wherein a prefabricated thermal insulation keel is mounted on a basal layer wall body through a mechanical anchor firmware, and then a negative angle column and a positive angle column are mounted, heat-insulating material is filled between the positive angle column and the negative angle column, both lateral sides of the invention are respectively equipped with two thermal insulation keels, and J-shaped slotted plates are respectively mounted on the two thermal insulation keels, and a prefabricated door-window insulating sleeve hole is mounted on a door-window opening, the periphery of a sash is filled and infused with foaming polyurethanes, a heat-insulating board is filled between the thermal insulation keels, and the thermal insulation keels are fixed by an anchor firmware with a round plate, and the foaming polyurethanes are infused in gaps, at last a cladding decoration panel is fixedly mounted on the outer side of the thermal insulation keels by self-threading screws. The thermal insulation property of the thermal insulation compound wall body is excellent, and the thermal insulation compound wall body achieves an integral dry construction, the architectural exterior facing is rich and colorful, the cubic effect is strong, the invention is not easy to be polluted, which can be widely applied to civilian constructions which are newly constructed, enlarged, and rebuilt and needs thermal insulation and heat insulation, in particular to villas whose heights of eaves are less than 20m and floors are less than 3 to 4, and outer-eaves decoration of middle grade and high grade constructions.

A plant eradication device, the driving shaft (12) of which comprises a slender shaft main part (21) made of titanium alloy, and a shaft end made of steel and integrally connected with the opposite end of the shaft main part (21) part (22,26). Titanium alloys have substantially the same mechanical strength as steel. Therefore, the shaft main part (21) made of titanium alloy can ensure the rigidity required by the general plant removal machine, and can reduce the weight of the drive shaft, thereby reducing the undesired droop-induced vibration caused by the self-weight of the shaft .

The invention discloses an interception and drainage pressure-reduction anti-floating system which comprises a waterproof curtain arranged around an underground structure. A plurality of water collecting pits are formed below a bottom plate of the underground structure. Immersible pumps and water level induction switches are arranged in the water collecting pits. Well holes are formed in the bottoms of the water collecting pits. Pressure-reduction well pipes are arranged in the well holes. Anti-filtration layers are arranged around the pressure-reduction well pipes. The tops of the pressure-reduction well pipes are higher than openings of the well holes. The anti-filtration layers are located in the water collecting pits. The pressure-reduction well pipes are mainly formed by axially and vertically stacking a plurality of non-fine concrete well rings. The non-fine concrete well rings comprise upper annular ring beams, lower annular ring beams, stand columns and non-fine concrete wedge-shaped blocks. By means of cooperative work of the system, buoyant force on the bottom plate can be effectively reduced, the drainage amount can be controlled, the surrounding is protected against surface subsidence caused by the too large drainage amount, the number of uplift piles and the number of uplift anchor rods are greatly decreased, non-fine concrete blocks can be conveniently dismounted and replaced, and it is guaranteed that a pressure-reduction well has enough durability.

A heat exchanger tube 41 includes: a first cover layer 44 provided on an outer side of a tube main body 42 to partly or completely cover a tube main body 42; and a second cover layer 45 provided on an outer side of the first cover layer 44 to partly or completely cover the first cover layer 44. The first cover layer 44 is formed by overlay-welding a material higher in ductility than the second cover layer 45 to the tube main body 42. The second cover layer 45 is formed by overlay-welding a material higher in hardness than the first cover layer 44 to the first cover layer 44.

The invention discloses a fabricating method of a concrete preformed pile in a saline soil region and belongs to the field of civil engineering. The fabricating method comprises the following steps of: mixing light calcined magnesia powder or a mixture of light calcined magnesia powder and calcined lime with mineral admixtures such as granulated blast-furnace slag, pulverized fuel ash, silica fume and steel slag according to a certain proportion and taking the mixture as a cementing material, mixing the cementing material, thick and thin aggregates such as sand stones, and water, taking the mixture as a base material for producing the preformed pile, and finally hardening the base material under a CO2 environment after processes of stirring, forming, pre-curing and the like. As the final products of the cementing material after being subjected to hydration and carburization are magnesium carbonate and calcium carbonate which are not corroded by salinity in the saline soil, the cementing material has enough durability. The corrosion-resistant concrete preformed pile is suitable for the saline soil having a salt content not higher than 44% (mass percentage content).

With respect to a tap covered with hard coating, to even in tapping machining of mild steel, etc., facilitate curling of chips so as to inhibit any entanglement thereof, thereby attaining not only enhancement of tool life duration but also continuous operation of tapping machining. ¢MEANS FOR SOLVING PROBLEMS! Not only is twist groove (20) formed by cutting machining, but also screw part (16) is provided by grinding machining performed after heat treatment. The surface of the screw part (16) including the twist groove (20) formed by cutting machining is covered with hard coating (26), so that the surface roughness of twist groove (20) in the state of being covered with the hard coating (26) falls within the range of 6.3 to 25 ¢mu!m in terms of maximum height (Rz). Accordingly, even in the tapping machining of mild steel, etc., curling or segmentalization of chips would be facilitated by the unevenness of the groove surface when the chips are guided by the twist groove (20) and ejected on the side of shank (12). Therefore, entanglement on the tap (10) per se or holders would be inhibited.

The invention discloses a permanent magnet motor magnetic steel installation and fixation retainer. The permanent magnet motor magnetic steel installation and fixation retainer is characterized by comprising a cylinder cage-shaped retainer body, wherein partition magnetic stripes are arranged on the retainer body according to equal arcs of a circumference, the space formed between adjacent partition magnetic stripes and the retainer body in an enclosing mode is a partition magnetic stripe groove, and openings of the partition magnetic stripe groove are arranged in the mode that the diameter of the opening on the inner side is smaller than the diameter of the opening on the outer side. By the adoption of the structure, reacting force generated by a trapezoid cross section can effectively prevent magnetic steel from getting loose, the magnetic steel can be fixedly connected with a magnetic yoke relatively with no need for an anaerobic adhesive, a stainless steel ring, a carbon fiber, a bolt lock and other materials, therefore, the installation process of the magnetic steel is greatly simplified, the installation efficiency is improved, the failure rate of a motor due to the fact that a magnetic steel strip falls off is reduced, and the production efficiency of the motor is improved. Moreover, the permanent magnet motor magnetic steel installation and fixation retainer can be manufactured in an injection molding mold opening mode, the mold opening cost is relatively low, the manufacturing is easy, and popularization and use are convenient.

The invention discloses a laser desorption ionization mass spectrometry detection method. The method includes the following steps: (1) preparing an efficient light absorbing material as a sample substrate; (2) dropping a to-be-detected sample into the sample substrate, and drying the to-be-detected sample; and (3) performing laser desorption ionization mass spectrometry analysis. The desorption ionization of organic and biomolecules can be effectively realized by using the efficient light absorbing material as the sample substrate of laser desorption ionization, and fragment ions are hardly generated; mass spectrometry detection and analysis on various samples such as carbohydrate, amino acid, metabolite and drug molecules can be realized; and good signal to noise ratio, repeatability, high sensitivity and high salt tolerance can be realized; through the method, complex sample preparing processes are not needed, the addition of organic matrixes are not needed, and there is no background peak interference at low quality end; and a general, simple, efficient, fast and sensitive soft ionization detection method can be provided for various biomolecules.

The invention discloses an ecological aluminium oxide melamine wood door, which is formed by an interlayer door frame and decorating plates which are pressed on the front and rear sides of the interlayer door frame. The ecological aluminium oxide melamine wood door is characterized in that: the decorating plates adopt melamine plates; an anti-wear agent prepared from aluminium oxide is laminated on the sides of the melamine plates; and the front and rear sides of the interlayer door frame are coated with polystyrene foams and then the melamine plates are pressed on the two sides by a hot press or a cold press. The ecological aluminium oxide melamine wood door and the preparation method thereof can not only solve the problem of wasting timber resources and simplify the production process, but also overcome the shortcoming of complicated process of the production method. The product cost is greatly reduced and the production cycle is shortened.

The invention discloses a construction waste recycled aggregate composite carrier pile. The construction waste recycled aggregate composite carrier pile mainly comprises a rammed body, a pile body and a mattress layer, and is characterized in that the rammed body is formed by sorted construction waste on the outer layer and dry and hard recycled concrete on the inner layer; the pile body is composed of a pile casing above the rammed body, a steel reinforcement cage inside the pile casing and recycled concrete poured into the pile casing; the mattress layer is laid at the pile head position. A preparation method of the construction waste recycled aggregate composite carrier pile comprises the steps of smashing, screening, mixing, preparation of a pile moving machine in place, column-hammer tamping, pile casing follow-up hole formation, filler tamping, measurement of penetration of three drives, tamping and filling of the recycled concrete, placement of the steel reinforcement cage, filling of a finished pile, laying of the mattress layer and the like. The phenomenon that construction waste can not be used after old buildings are dismantled is solved, and the obtained composite carrier pile is good in expanded-base effect, high in single pile bearing capacity and small in deformation.

The invention discloses a green and environment-friendly permeable asphalt mixture for cold regions. The green and environment-friendly permeable asphalt mixture comprises, by weight, 210-230 parts ofsteel slag, 8.80-9.53 parts of SBS (styrene-butadiene-styrene block copolymer) modified asphalt, 6.14-6.36 parts of limestone mineral powder, 1.14-1.27 parts of diatomaceous earth, 0.70-0.95 part ofrubber powder, 0.53-0.76 part of TPS (toughened polystyrene) asphalt high-viscosity agents, 0.25-0.30 part of warm mixing agents and 0.47-0.94 part of basalt fibers. The invention further provides a method for preparing the green and environment-friendly permeable asphalt mixture for the cold regions. The green and environment-friendly permeable asphalt mixture and the method have the advantages that the green and environment-friendly permeable asphalt mixture is sufficient in strength, water stability, durability, frost resistance and water permeability, rainwater can be immediately permeatedinto spaces below pavements, accordingly, the driving safety can be greatly guaranteed, driving noise can be lowered, and urban water logging can be reduced; the construction temperatures further canbe reasonably lowered, the construction difficulty can be lowered, and the green and environment-friendly permeable asphalt mixture and the method have important engineering application values.

The invention discloses a flexible basic structure for a high speed railway ballastless track and a laying method of the track. The structure comprises an asphalt base layer and an asphalt surface layer, wherein the asphalt base layer and the asphalt surface layer are sequentially arranged from bottom to top, the asphalt base layer is bonded with the asphalt surface layer through a middle binding layer, the asphalt base layer is of a composite structure and comprises at least three modified epoxy asphalt concrete layers, and the different modified epoxy asphalt concrete layers are bonded through internal binding layers; a lower binding layer is arranged on the lower surface of the asphalt base layer, and an upper binding layer is arranged on the upper surface of the asphalt surface layer. The flexible basic structure has enough strength and durability and other performance, and meanwhile transverse resistance, elastic coefficients, vibration attenuation and noise reduction effects and waterproof and anti-freeze performance of the basic structure are superior to those of a rigid basic structure of cement concrete.

Disclosed is a shaft stave which is provided on the inner periphery of a blast furnace shaft, and which has: a stave main body which has a reference surface facing the internal space of the blast furnace; and a plurality of protrusions which protrude from the reference surface towards the internal side of the furnace.

The invention discloses a tamping device for road engineering. The tamping device comprises a bottom plate, wherein a hydraulic oil tank, an oil pump, a speed reducer and a hydraulic distributor are arranged at the upper part of the bottom plate; an output shaft of the speed reducer is fixedly connected with an input shaft of the oil pump; an oil inlet of the oil pump is communicated with an oil outlet of the hydraulic oil tank through a hydraulic pipe; in addition, an oil outlet of the oil pump is communicated with an oil inlet of the hydraulic distributor through a hydraulic pipe; one side of the bottom of the bottom plate is provided with a press roller through a support frame; the other side of the bottom of the bottom plate is provided with a support wheel through a vibration reduction support frame. The tamped roadbed can be compressed, so that the dynamic load resistance capability of the roadbed is high; the resistance capability for resisting the damage and invasion caused bythe natural condition change such as geology, water, rainfall, climate and earthquake is high; the enough firmness, stability and durability are realized; the back output of a tractor can be used fordriving the tamping device to complete the tamping task; the tamping device is worthy of being popularized and generalized.

The present invention provides an electromagnetic fuel injection valve having a resin molded part made of synthetic resin, the resin molded part integrally has a connector and embeds at least a part of an electromagnet case, the connector faces A connecting terminal connected to a coil of a coil assembly, wherein the resin molding part (7) is composed of a first resin molding layer (7a) and a second resin molding layer (7b), and the first resin molding layer (7a) covers at least the electromagnetic A part of the iron shell (25), and constitutes at least a part of the connector (40), the first resin molding layer (7a) is formed by a synthetic resin mixed with glass fibers; the second resin molding layer (7b) covers the first The resin forming layer (7a) is formed of thermoplastic polyester rubber not mixed with glass fiber. Thereby, sufficient strength can be ensured to obtain reliability of the electrical connection portion, generation of operation noise can be effectively suppressed, and compactness can be achieved.

This device is a power transmission device connecting a mechanical automatic transmission 44, an engine 41 and a belt type continuously variable transmission and transmitting output of the mechanical automatic transmission 44 to a differential mechanism 45 and driving a left and a right drive wheel 2. The mechanical automatic transmission 44 is an automatic transmission having a low speed gear 65b and a high speed gear 65a transmitting the output to the differential mechanism 45 and a centrifugal shifting clutch 64 connecting when an output revolution speed of the belt type continuously variable transmission rises, and selecting two speeds of the low speed gear 65b and the high speed gear 65a by connection and disconnection of the centrifugal shifting clutch 64, and has a small-sized and lightweight structure.

A latent electrostatic image developing toner of the present invention is mainly composed of two or more binder resins, a colorant, a releasing agent and a layered compound. A first binder resin of the binder resins is a polyester resin with an acid value of 15 KOHmg / g or less. The layered compound is a compound in which at least some interlayer ions are modified by organic ions. Toner particles are prepared by granulation in an aqueous medium, and the layered compounds are localized in the surface of the particles by the pelletization in the granulation. The average circularity of the particles is 0.970 or more.

A floor system for visually impaired person guidance, which is capable of guiding visually impaired persons mainly using canes for blind persons mainly in buildings and allowing normal persons and wheelchair users to walk and pass through easily, is provided. By laying a visually impaired person guidance region (1) which may be distinguished from other regions (2) by visually impaired person onto a floor surface, a guidance route is constituted and the floor system is formed, wherein the guidance route has a visually impaired person warning area (3) provided with a warning pattern at a turning point, and the warning pattern comprises a concave part and a protruding part the height difference between which is less than 3 mm, the height difference of the concave and protruding parts and other regions (2) except the visually impaired person guidance region (1) is within 3 mm, one of the concave and protruding parts has a mesh shape pattern, and the other has a dot form pattern.

In some preferred embodiments, an extrusion die 10 for a metallic material includes a die case 20 having a pressure receiving portion 21 with a metallic material pressure receiving surface 22 faced rearward against an extrusion direction, a male die 30 disposed in the die case 20, and a female die 40 disposed in the die case 20. The pressure receiving portion 21 is formed into a convex configuration protruded rearward, and a porthole 24 for introducing the metallic material is provided in an outer periphery of the pressure receiving portion 21. A ratio of a flat state opening area Sb of a porthole inlet portion 24e to a flat state area Sa of the pressure receiving portion 21 is set to 0.15 to 0.80. The extrusion die is configured such that the metallic material pressurized against the metallic material pressure receiving surface 22 is introduced into the die case 20 via the porthole 24 and passes through the extrusion hole 11.

The invention relatesto a process for track member production in which the hardness of a region including a rolling surface is sufficiently heightened to ensure a sufficient rolling fatigue life and the hardness of a region to be plastically deformed can be stably controlled, while inhibiting the production cost from rising. The process comprises a steel member preparation step, a heat treatment step, and a finishing step. The heat treatment step comprises: a carbonitriding step in which the steel member is heated to a carbonitriding temperature not lower than point A1 and is carbonitrided; a temperature-maintaining step in which the steel member is cooled from the carbonitriding temperature to a temperature in the range of from a temperature lower by 100 DEG C than point A1 to less than point A1 and is held in that temperature range for 60-180 minutes; and a high-frequency quenching step in which that high-hardness region of the steel member which includes the region to become the rolling surface of the track member is subjected to high-frequency quenching while preventing the low-hardness region, which is the region other than the high-hardness region, from undergoing quench-hardening.

The invention provides a refrigerator door seal which is light in weight and less in heat leakage amount. The refrigerator door seal comprises a mounting portion mounted to a peripheral portion of a refrigerator door, a magnet holding portion accommodating a magnet attracted around an opening portion of a storage chamber of a refrigerator main body and a thin-walled bag portion connecting the mounting portion and the magnet holding portion in a telescopic free manner. The refrigerator door seal comprises a foamed body of a foamed vinyl chloride resin composition.