43results about How to "Reduce transfer effect" patented technology

The invention discloses a method for preventing and controlling rock burst remained under a coal pillar, which is used for weakening an upper coal pillar by constructing and drilling a tunnel under a coal pillar and adopting a high-pressure water injection mode to reduce the intensive high stress in the coal pillar. The method comprises the following steps: firstly, grasping the position relationship between a remained coal pillar and the lower working surface to determine a releasing area; then, constructing water injection and drilling in the area, and determining drilling parameters according to the geographical condition and position relationship; grasping the drilling depth when entering the upper coal layer in the drilling constructing process; injecting water by utilizing an emulsion pump station, a high-pressure water injection pipeline and a hydraulic expansion hole packet after drilling is completed, and leading the hole packing position to be in the upper coal layer; and stopping water injection when the water injection time is reached or water injection pressure is unexpectedly reduced. The method can realize direct releasing treatment for a coal pillar remained in a gob, and has the advantages of low construction amount, high safety coefficient, good prevention effect and the like in comparison with drilling release, coal layer burst and other traditional methods.

The invention relates to a reactor for preparing isocyanate in a gas phase, which comprises a mixer and a tubular reactor, wherein a 5 to 45 variable-diameter connecting element is arranged between the mixer and the tubular reactor; an internal member is arranged in the tubular reactor. The invention also discloses a method for preparing isocyanate by using the reactor, which comprises the following steps: diluting primary amine with an inert gas or vapor of an inert solvent, and mixing and reacting the mixed gas of diluted primary amine with phosgene in the mixer; and allowing the obtained reaction product to flow into the tubular reactor from the mixer and the variable-diameter connecting element of the tubular reactor to undergo a further reaction, and cooling and absorbing the product of the reaction to obtain an isocyanate product. When the reactor provided by the invention is adopted, the length of the tubular reactor is reduced by arranging the variable-diameter connecting element between the mixer and the tubular reactor; and as the internal member is arranged in the tubular reactor, the reaction effect in the reactor is improved and the product yield is improved.

The invention relates to a method for starting the combustion engine in parallel hybrid vehicles, wherein the combustion engine is started via the electric engine during a load shift in the electric operation only.

The invention discloses a novel heat pipe type auxiliary condenser, which is applicable to refrigerators, freezers, cryogenic boxes, slush machines, ice-cream machines, and other small-sized refrigeration equipment. The auxiliary condenser comprises heat-absorbing pipes, a condensing pipe, a heat releasing box, a one-way valve (or a working medium pump), a box body casing fit with the condensing pipe, an aluminum foil belt for fixing the heat-absorbing pipes and the condensing pipe and an insulation foaming layer. Each heat-absorbing pipe is an annular cylindrical pipe with a radian not less than 180 degrees, and is tightly clamped on the condensing pipe, and the longitudinal tangent plane of each annular cylindrical pipe is contacted with the inner side of the box body casing. The contact areas, contacted with the condensing pipe, of the inner side of the box body casing are round grooves with a radian not larger than 180 degrees, and the heat conduction area between the condensing pipe and the box body casing is increased. The auxiliary condenser disclosed by the invention not only is high in heat radiating capacity, simple in manufacturing process, low in cost, convenient to mount, but also has the advantage that the heat transferring capacity to the insulation foaming layer can be effectively reduced under the condition that the condenser is not hindered from transferring heat to the external through the box body casing. In addition, the auxiliary condenser has the characteristics of zero energy consumption or low energy consumption and capability of being wholly recycled and reutilized.

A method for slowing transfer of a heavy work machine on a sloping base using a transportation device equipped with wheels, the work machine including a body, a crawler chassis fitted beneath thebody, a set of booms having at least one operating cylinder, a first end and a second end, said set of booms being pivoted at the first end to the work machine and a selected auxiliary device is pivoted at the second end, and a brake surface connected to the auxiliary device, in which method includes the steps oftransferring the work machine by supporting the work machine on the crawler chassis at least partly on top of the transportation device,towing the work machine using a transfer vehicle with the aid of the transportation device,using said operating cylinder of the set of booms to press the brake surface against the sloping base to create friction to slow transfer speed of the transportation device on the sloping base, andadjusting pressing of the brake surface taking place through the auxiliary device using the operating cylinder or one set of booms. An arrangement in connection with a heavy work machine for transferring the work machine on a sloping base is also described.

The invention discloses a crushing and grinding device facilitating complete discharging for traditional Chinese medicinal materials. The crushing and grinding device comprises a crushing main body, aguiding plate, a second motor, pressing plates, a slider and pairs of crushing scissors, wherein a feed opening is fixedly mounted at the top end of the crushing main body; a first motor is arrangedin the middle of the feed opening; a sliding block is fixedly mounted above the slider; a gear groove is formed inside the sliding block; a steering gear set is arranged in the middle of the gear groove; a rotating shaft is connected to the right side of the steering gear set; the upper part of each pair of crushing scissors is connected to fixed pulleys through pull wires; and upper parts of observation cover plates are connected to the crushing main body and a discharge cavity through hinges respectively. According to the crushing and grinding device facilitating complete discharging for thetraditional Chinese medicinal materials, the spatial transitivity is reduced, and the preheating time is shortened. Not only can the traditional Chinese medicinal materials on heating base plates bewell heated and dried directly, but also extrusion can be well performed under the action of the pressing plate after finish of drying.

The invention relates to a novel composite gypsum building block and application thereof. The novel composite gypsum building block comprises a composite gypsum block body, a steam-proof block body and a barrier block body, the steam-proof block body is arranged on the gypsum block body, and an adsorptive block body is arranged on the steam-proof block body. The gypsum block body is prepared fromthe following raw materials: gypsum, furnace slag, expanded perlite, silicon powder, nanofibers, a solid phase change heat storage material, a reinforcing agent and a water reducing agent. The steam-proof block body is prepared from the following raw materials: an ethylene-vinyl acetate copolymer, nano aluminum powder and polyethylene. The barrier block body is prepared from the following raw materials: silicon dioxide, zeolite powder, bentonite, ceramsite, calcium silicate and condensed magnesium phosphate. According to the gypsum building block, the steam-proof block body and the barrier block body are compounded on the surface of the gypsum block body to form the gypsum building block, so that the gypsum building block has good corrosion resistance to ammonia gas and water vapor generated in a toilet, meanwhile, the formation of temperature stress in the use process can be reduced, and the cracking of a building block wall body is prevented.

The invention relates to the technical field of high-density breeding environment wastewater treatment, in particular to a method for efficiently treating high-density breeding environment wastewater.Specifically the method comprises the following steps: adding a passivator into breeding environment livestock and poultry wastewater, and then carrying out ionizing irradiation treatment to obtain livestock and poultry liquid dung I; carrying out a micro-electrolysis / aeration biological fluidized bed reaction on the livestock and poultry liquid dung I to obtain livestock and poultry wastewater II; adding bittern into the livestock and poultry wastewater II for struvite crystallization treatment, and performing filtering to obtain livestock and poultry wastewater III; and adding ferric oxidehydrate loaded hydrothermal carbon into the livestock and poultry wastewater III to adsorb and retreat nitrogen and phosphorus, and discharging the treated liquid after adsorption is completed, wherein the passivator is nano zero-valent iron loaded on modified zeolite. According to the method, relatively high-degree degradation and passivation of residual antibiotics and heavy metals in the high-density breeding environment wastewater are realized, COD and ammonia nitrogen can be efficiently degraded, 95% or more of nitrogen and phosphorus can be recycled, the safety and applicability of recycling of the high-density breeding environment wastewater are improved, and the application field of the high-density breeding environment wastewater is expanded.

The invention discloses a carbon-coated manganous-manganic oxide composite material and a preparation method and application thereof, the composite material takes manganous-manganic oxide as an innercore, and the surface of the composite material is coated with an amorphous carbon layer. The preparation method comprises the following steps: dissolving potassium permanganate and glucose in a solvent, stirring, carrying out hydrothermal reaction on the obtained mixed solution, centrifuging, washing, filtering, and drying to obtain a carbon-coated manganous-manganic oxide precursor; and calcining, pickling, washing and drying the carbon-coated manganous-manganic oxide precursor to obtain the carbon-coated manganous-manganic oxide composite material. The carbon-coated manganous-manganic oxidecomposite material disclosed by the invention has the advantages of good adsorption performance, high catalytic activity, good stability and the like, can realize efficient degradation of organic pollutants, has good reutilization performance, and has good use value and application prospect. The preparation method disclosed by the invention is simple in overall process flow, low in requirements on equipment and reaction parameters and beneficial to large-scale production.

The invention discloses a method for controlling a laneway floor heave through deep-hole section blasting. The method comprises the following steps of: boring a combined blast hole incline and below two edges of a laneway and a base plate under strong support, and filling explosive to blast in a special section of the deep part of the blast hole to realize that the stresses of the special sections of the laneway edges and the base plate are transmitted to the deep parts of surrounding rocks. The invention has the beneficial effects that: a rock layer of the base plate of the laneway at the position is arranged under a stress environment with a lower level and the total deformation amount of the base plate is reduced by blasting and decompressing the special sections of the deep parts of the laneway edges and the base plate; simultaneously, the special sections are arranged in the deep parts of the surrounding rocks, thus the influence of the blasting on the completeness and the bearing capability of a surrounding rock structure in a shallow part is smaller, and the surrounding rock structure in the shallow part can still effectively prevent the deformation of the surrounding rocksin the deep parts. According to the method disclosed by the invention, the surrounding rocks in the deep part of the laneway are blasted, the surrounding rocks in the shallow parts are reinforced andare protected in completeness, both of aspects are organically combined, thus the amount of the laneway floor heaves is controlled. The method of the invention is simple and convenient to construct, is easy to handle, and has better control effect on the floor heaves and wide application prospect.

A magnetic disk apparatus with a magnetic disk medium capable of recording data magnetically, comprises a current perpendicular to plane magnetic reproducing head which includes a magnetoresistive effect element composed of a plurality of magnetic films stacked one on top of another and causes sense current to flow in the direction perpendicular to the stacked faces of the plurality of magnetic films, a high-pass filter which suppresses the low-frequency component of a reproduced signal output from the magnetic reproducing head, and a reproduced-signal processing section which reproduces the data from the reproduced signal which has the low-frequency component suppressed.

The invention discloses a high heat resistant hollow substrate worktable which can deposit CVD diamond films in a plurality of facets in view of the problems of the inconsistence of temperature fields and reaction gas flow fields on a substrate side along the thickness direction, high residual stress and bad thickness uniformity of deposited CVD diamond films, etc., caused by initially slow temperature rising and fast cooling existing in present compulsory cooling worktables; wherein, the invention is characterized in that screens (2) are positioned inside an upper frame (1) which is connected with a bearing (4) through a bracket (3), and a substrate (6) used for depositing the CVD diamond films is uniformly placed on the screens (2), and a plane for placing the substrate (6) on the screens (2) is parallel with a lower bottom surface of the bearing (4); the invention ensures that the substrate temperature rises rapidly when the diamond is deposited at the beginning and the substrate temperature falls slowly when the deposition of the diamond is over, which improves the uniformity of the reaction gas flow field; the thickness and quality of the diamond films of substrate sides and upper surfaces deposited on the substrate worktable are consistent and the residual stress of the CVD diamond films is reduced, which is especially suitable for the surface deposition of hard alloy cutting tools.

The invention discloses a fan module. The fan module comprises a fan, a fan bracket and a plurality of buckles for fixing the fan on the fan bracket, wherein all the buckles are made of a damping material, are arranged between the fan and the fan bracket and are positioned below the fan. In the fan module, the fan is isolated from the fan bracket by the buckles, so that the transmission effect of vibration produced during work of the fan is greatly reduced, and noise can be effectively reduced; and the fan module also contributes to the normal work of other electronic elements in a computer case.

The invention discloses an indoor sound absorption and heat insulation floor tile and a preparation method, and belongs to the technical field of building materials. The floor tile is prepared from gypsum, cement, coal ash, lime, attapulgite clay, nano-silicon dioxide, aluminum oxide, kieselguhr, quartz powder and oil shale residues. The preparation method includes the steps that pasty attapulgite clay is prepared, and then gypsum, cement, coal ash, lime, nano-silicon dioxide, aluminum oxide, kieselguhr, quartz powder and oil shale residues are weighed respectively, smashed and subjected to ball milling for 2-5 h to obtain a mixture a1; the mixture a1 and the pasty attapulgite clay are mixed and stirred to be uniform, mold forming is carried out, and after treatment, the floor tile is obtained. The indoor sound absorption and heat insulation floor tile has a good waterproof effect and good sound absorption and heat insulation effects and effectively reduces energy consumption. Besides, the preparation method is simple and easy to implement and has high application value.

In a case where a subject parameter distribution is obtained using MRI, a magnetization transfer effect is suppressed such that the calculation accuracy of T1 and T2 of brain parenchyma can be improved and a variation in the T1 value of blood caused by the effect of blood flow can be reduced. In imaging for parameter estimation, a magnetization transfer effect is suppressed by using a high frequency magnetic field pulse having a narrow frequency band as an excitation pulse. In a case where the frequency band is narrow, the high frequency magnetic field pulse has a shape in which the excitation profile is similar to a Gaussian function. A rising portion of the shape is arranged in a field of view where the head is an imaging target.

The invention provides a building fireproof and heat insulating hollow plate. An outer face plate and an inner face plate are parallel up and down; a cement tank is arranged on the inner face plate and connected with the inner side of the outer face plate; a heat dissipation device is connected with the cement tank and sequentially penetrates through a supporting face, a fireproof layer and the outer face plate; the heat dissipation device comprises a filling layer stacked and piled through heat dissipation mediums and further comprises a heat conducting plate connected with the cement tank and the filling layer; as for the filling layer in the direction from the cement tank to the outer face plate, the stacking density is sequentially and progressively increased, and the cross cutting area is sequentially and progressively decreased; and the progressive change range of the stacking density is 0.5-2.8 g / cm<3>, and the progressive change range of the cross cutting area is 4-50 cm <2>. According to the building fireproof and heat insulating hollow plate, heat in the hollow late can be discharged and dissipated in time when a fire occurs, the building fireproof and heat insulating hollow plate is not burned in the fire and can be recycled for many times, and the building fireproof and heat insulating hollow plate has the good fireproof, heat insulating, sound insulating functionsand is an excellent building material.

The invention discloses polyimide containing benzoxazole and carbazole structures as well as a preparation method and application of the same. The compound is prepared from dihalogenated carbazole, wherein active hydrogen in monomer carbazole is grafted with a benzoxazole-containing structural unit, a novel functional diamine monomer with benzoxazole and carbazole structures is prepared through Suzuki reaction or direct ammoniation with liquid ammonia, and then the diamine compound is used for synthesizing high-performance and functional polymers such as novel polyimide, polyamide and polyesterimide. The polyimide material synthesized from the diamine monomer is high in thermal stability, and has obvious fluorescence characteristics and high luminous intensity.

The invention belongs to the field of spacecraft assembly structure design and particularly relates to a pipeline cabin penetration flange of a spacecraft sealed cabin body. The high-heat-resistance sealed cabin pipeline cabin penetration flange comprises a cup-shaped flange base, a guide pipe and a supporting gasket. The cup-shaped flange base comprises a cup body and a flange base body. One end of the guide pipe penetrates through the cup bottom of the cup body in the cup-shaped flange base and is fixed through welding, and the other end of the guide pipe penetrates through a central through hole of the flange base body. A gap between the other end of the guide pipe and the central through hole of the flange base body is filled through the supporting gasket. Ventilation holes are circumferentially and uniformly distributed in the supporting gasket. The cup-shaped flange base of the pipeline cabin penetration flange has the characteristic of high heat resistance and adopts the towering cup body type design, the path where heat of a spacecraft cabin body structure is transmitted to the guide pipe can be prolonged, and the transmission efficacy of the heat is effectively relieved.

The invention discloses a high-efficiency electric radiant tube heater, which comprises a straight cylindrical radiant tube, a heater arranged in the radiant tube and a tube cover; the tube cover is closed on the port of the radiant tube; The upper through hole and the lower through hole; the further improvement is: the radiant tube is provided with at least one annular partition groove on the inner wall between the end of the heater and the tube cover; the partition groove is provided with a high temperature resistant non-metallic material; The material is high temperature resistant ceramic mud. The air in the radiant tube of the invention can circulate, has high thermal efficiency and long service life; by blocking the transfer of heat on the radiant tube, the heating efficiency is significantly improved, energy loss is also significantly reduced, and energy is saved.

The invention relates to a novel composite gypsum block and its application. The new composite gypsum blocks include composite gypsum blocks, steam-proof blocks, and barrier blocks. The steam-proof blocks are on the gypsum blocks, and the adsorption blocks are on the top. The gypsum block is made from the following raw materials: gypsum, slag, expanded perlite, silicon powder, nanofiber, solid phase change heat storage material, part reinforcing agent, and water reducing agent. The steam-proof block is made from the following raw materials: ethylene-vinyl acetate copolymer, nano-aluminum powder, polyethylene. The barrier block is made from the following raw materials: silicon dioxide, zeolite powder, bentonite, ceramsite, calcium silicate, and condensed magnesium phosphate. The invention adopts the gypsum block made by compounding the steam-proof block and the barrier block on the surface of the gypsum block, which has good corrosion resistance to the ammonia gas and water vapor generated in the toilet, and can reduce the use of the gypsum block. The formation of temperature stress prevents the block wall from cracking.

The invention discloses a method for controlling a laneway floor heave through deep-hole section blasting. The method comprises the following steps of: boring a combined blast hole incline and below two edges of a laneway and a base plate under strong support, and filling explosive to blast in a special section of the deep part of the blast hole to realize that the stresses of the special sections of the laneway edges and the base plate are transmitted to the deep parts of surrounding rocks. The invention has the beneficial effects that: a rock layer of the base plate of the laneway at the position is arranged under a stress environment with a lower level and the total deformation amount of the base plate is reduced by blasting and decompressing the special sections of the deep parts of the laneway edges and the base plate; simultaneously, the special sections are arranged in the deep parts of the surrounding rocks, thus the influence of the blasting on the completeness and the bearing capability of a surrounding rock structure in a shallow part is smaller, and the surrounding rock structure in the shallow part can still effectively prevent the deformation of the surrounding rocksin the deep parts. According to the method disclosed by the invention, the surrounding rocks in the deep part of the laneway are blasted, the surrounding rocks in the shallow parts are reinforced andare protected in completeness, both of aspects are organically combined, thus the amount of the laneway floor heaves is controlled. The method of the invention is simple and convenient to construct, is easy to handle, and has better control effect on the floor heaves and wide application prospect.

The invention provides a building fireproof and heat insulating hollow plate. An outer face plate and an inner face plate are parallel up and down; a cement tank is arranged on the inner face plate and connected with the inner side of the outer face plate; a heat dissipation device is connected with the cement tank and sequentially penetrates through a supporting face, a fireproof layer and the outer face plate; the heat dissipation device comprises a filling layer stacked and piled through heat dissipation mediums and further comprises a heat conducting plate connected with the cement tank and the filling layer; as for the filling layer in the direction from the cement tank to the outer face plate, the stacking density is sequentially and progressively increased, and the cross cutting area is sequentially and progressively decreased; and the progressive change range of the stacking density is 0.5-2.8 g / cm<3>, and the progressive change range of the cross cutting area is 4-50 cm <2>. According to the building fireproof and heat insulating hollow plate, heat in the hollow late can be discharged and dissipated in time when a fire occurs, the building fireproof and heat insulating hollow plate is not burned in the fire and can be recycled for many times, and the building fireproof and heat insulating hollow plate has the good fireproof, heat insulating, sound insulating functionsand is an excellent building material.

The invention discloses a self-flame retardant PBT composite material and a preparation method thereof. The self-flame-retardant PBT composite material is prepared from the following raw materials in parts by mass: 40 to 50 parts of terephthalic acid, 45 to 55 parts of 1, 4-butanediol, 15 to 25 parts of pyromellitic acid, 3 to 10 parts of guanidine sulfamate, 2 to 4 parts of amino trimethylene phosphonic acid, 1 to 2 parts of a catalyst and 10 to 15 parts of functionalized layered double hydroxides. The preparation method comprises the following steps: S1, mixing terephthalic acid, 1, 4-butanediol and a catalyst, carrying out pre-esterification reaction for 2-3 hours under the conditions of 0.1 MPa and 200-220 DEG C, then adding pyromellitic acid, guanidine sulfamate and amino trimethylene phosphonic acid, heating to 245-270 DEG C, and carrying out stirring reaction for 1-1.5 hours; and S2, vacuumizi1ng the reaction system in the S1 to 50-100 Pa, carrying out condensation polymerization at 240-255 DEG C for 3-6 hours, then adding the functionalized layered double-metal hydroxide, carrying out stirring reaction at 250-270 DEG C for 1-2 hours, and cooling and curing. According to the method disclosed by the invention, a flame-retardant substance is embedded into a PBT molecular chain, so that microcosmic molecular modification is realized, the PBT material is endowed with a self-flame-retardant characteristic, the problem of phase layering is avoided, and the mechanical strength and the mechanical property of the PBT material are greatly improved.

The invention discloses a preparation method of color-change-resistant wicker lampshades. The preparation method comprises the following operating steps that (1) after the surfaces of the woven and formed wicker lampshades are cleaned, the wicker lampshades are put into a drying oven to be dried; (2) modified liquid is sprayed on the surfaces of the wicker lampshades, and then the wicker lampshades are aired naturally for 3-4 days; (3) the wicker lampshades are arranged on a wooden sieve and fumigated through steam; and (4) the fumigated wicker lampshades are cooled to the room temperature, placed naturally for 3-4 days and put into the drying oven to be dried until the water content is 5% or below, and thus preparation is completed. According to the preparation method of the color-change-resistant wicker lampshades, the environmental protection effect is achieved, three-waste discharge is less in the operation process, the preparation method is suitable for large-scale industrial treatment of the wicker lampshades, the treated wicker lampshades have certain fragrance, the phenomenon that the color of the wicker lampshades is changed under lamplight can further be effectively prevented, and thus the service life of the wicker lampshades is prolonged.

The invention discloses an efficient and energy-saving type electric radiant tube heater which comprises a straight tubular radiant tube, and a heater and a flange which are arranged in the radiant tube. The radiant tube is provided with at least one annular partition slot on the inner wall between the end portion of the heater and the flange. The further improvement is that a heat-resisting nonmetallic material is arranged in the partition slot. According to the invention, by blocking the heat transfer on the radiant tube, the heating efficiency can be significantly improved, and the energy consumption is significantly reduced.

The invention discloses a preparation method of a homogenized large-size silicon nitride-based ceramic plate, which belongs to the technical field of functional ceramic preparation, and is characterized in that silica sol, a water-soluble macromolecular organic matter, a sintering aid and acid-washed silicon nitride ceramic powder are uniformly mixed, the acid-washed silicon nitride ceramic powder comprises 0.5-0.8 [mu] m particles and 1-2 [mu] m particles, and ball milling is carried out to obtain slurry; and vacuum degassing is performed on the slurry and then injected into a mold, the slurry is enabled to suspend in liquid nitrogen for full curing molding, then demolding is conducted to obtain a green body, and the green body is dried and sintered to obtain the homogenized silicon nitride-based ceramic plate material.

The invention belongs to the technical field of fire prevention and heat insulation, and particularly relates to a fire prevention and heat insulation plate. The fire prevention and heat insulation plate includes a base and a first plate. A connecting plate is arranged in the first plate. A first groove is arranged in the right side of the first plate. A second plate is arranged in the first groove, and the upper end of the second plate is fixed to the connecting plate. The outer sides of the second plate and the first plate are evenly coated with silver paint. A rubber plate and a third plateare fixed to the base. The rubber plate is fixedly connected with the connecting plate through a box body. The rubber plate is connected in a run-through manner with the box body. The box body is provided with a snake-shaped plate. The upper end of the snake-shaped plate is connected with the second plate. The upper end of the third plate is fixedly connected with the connecting plate. The gap between the third plate and the second plate is filled with asbestos tiles. The problem of fire spread due to the fact that the fire prevention and heat insulation plate in the prior art cannot reduce the production effect of heat conduction, heat radiation and heat convection can be solved. The fire prevention and heat insulation plate of the invention can prevent fire and insulate heat, and has abroad market prospect.