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 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 the

• • body, 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 of
  • transferring 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, and
  • adjusting 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 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.

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 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 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 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 relates to the technical field of heat pumps, in particular to a heating device combining an air source and a water source. The heating device combining the air source and the water source comprises a single-stage compression cycle pipeline (1), a two-stage compression cycle pipeline (2), a third heat exchanger (5), and a water inlet and outlet pipeline (6), wherein a first heat exchanger (3) and a second heat exchanger (4) are arranged in the single-stage compression cycle pipeline (1) and the two-stage compression cycle pipeline (2); the third heat exchanger (5) is connected between the single-stage compression cycle pipeline (1) and the two-stage compression cycle pipeline (2); and the water inlet and outlet pipeline (6) is sequentially connected with the third heat exchanger (5) and the second heat exchanger (4) and are used for absorbing heat in the single-stage compression cycle pipeline (1) and the two-stage compression cycle pipeline (2) and discharging hot water.The invention provides the heating device combining the air source and the water source with higher total water outlet temperature so as to meet the use demand.

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.