37results about How to "Eliminate direct contact" patented technology

The invention discloses a magnetic material with high temperature stability and a preparation method thereof, which is composed of an alloy material 1, an alloy material 2, an alloy material 3 and aninorganic ceramic material. The weight ratio of the alloy material 1, the alloy material 2, the alloy material 3 and the inorganic ceramic material is 1: 0.03- 0.09:0.003- 0.008:0.011- 0.015. The product obtained by the invention has excellent magnetic properties. In addition, the homogeneity of composition, microstructure and properties of the alloys were ensured by proper treatment, and the quality of the alloys was ensured. The preparation process of the alloy is simple, the cost of raw materials used for preparation is low, the process is simple, and the produced alloy has good properties,which is convenient for industrial production. The permanent magnet material prepared by the invention is suitable for the electric appliance industry.

The invention relates to an automatic aluminium material roll-coating production line, and the production process comprises the following steps of: a. roll charging; b. cleaning; c. chromization; d. coating; e. baking; f. cooling; g. film covering; h. roll discharging. With the method, the automatic aluminium material roll-coating production line of the invention can reduce dust accumulation in a furnace, and has high energy efficiency, and no burner or igniting source which can combust directly is in the furnace area, which completely eliminates the phenomenon of direct contact of burning particles with band materials, increases the quality of the surface coatings of the band materials, and is energy-saving and environment-friendly.

A rack-and-pinion type steering apparatus (1) includes a pinion (2) which is rotatable in an R direction, a rack bar (4) which has rack teeth (3) meshing with the pinion (2) and is linearly movable in an A direction, a housing (5) for rotatably supporting the pinion (2), a rack guide (6) for slidably supporting the rack bar (4), and a resilient means (7) for pressing the rack guide (6) toward the pinion (2).

A heavy oil processing coking prevention method belongs to the technical field of petroleum chemical engineering and process apparatuses, and is used to solve the coking problem of heavy processing fractionating towers. The method comprises the steps of fractionating tower washing desuperheating, high temperature oil gas entrance, low temperature cycle slurry oil entrance, low temperature oil gas discharge and high temperature cycle slurry oil discharge. The method is characterized in that a high temperature oil gas guiding device is arranged to guide high temperature oil gas entering the tower to a fractionating tower washing desuperheating segment, so the retention time of the high temperature oil gas in the fractioning tower is shortened, direct contact of high temperature cycle slurry oil with the high temperature oil gas is avoided, and local superheating of the high temperature cycle slurry oil is avoided; and the lower end of the washing desuperheating segment is provided with a high temperature cycle slurry oil collecting liquid guiding and cooling device in order to timely and rapidly reduce the temperature of the cycle slurry oil, so the retention time of the high temperature cycle slurry oil is shortened. The invention also provides an oil gas guiding tube, a liquid collecting and guiding skirt board and a rapid cooling medium distribution tube fractioning tower for realizing the method. The method maximally shortens the retention time of the high temperature oil gas and the high temperature cycle slurry oil and avoids local superheating of the cycle slurry oil in order to avoid system coking of the fractioning tower, and is applied in heavy oil catalytic cracking and coking fractionate towers.

The invention relates to a high-residual-magnetism material and a preparation method therefor. The high-residual-magnetism material consists of a combination of three kinds of alloy materials I, II and III, and an oxide complex IV; the materials are prepared separately, and the alloy materials I, II and III, and the oxide complex IV are prepared based on the weight ratio and added to a three-dimensional mixer to be mixed uniformly to obtain mixed powder; next, the mixed powder is subjected to orientation in a magnetic field press and shaped by adopting an isostatic pressing mode; and the formed blank is put into a sintering furnace under argon protection to be subjected to sintering treatment to obtain a high-residual-magnetism product. The alloy preparation process is simple and convenient, the process is simple, and the produced alloys have high performance, so that industrial production can be realized very conveniently.

The invention discloses a permanent magnet composite which is composed of three alloy materials A, B and C and an inorganic composite D according to the weight ratio of A to B to C to D being 1.2 to 1to (0.1-0.6) to (0.01-0.05). Through material mixing and press forming, a blank is placed in a sintering furnace to be sintered under the protection of argon, the temperature is first raised to 500-750 DEG C and then kept for 3-4 hours, then the temperature is raised to 1050-1090 DEG C for sintering for 3-4 hours, cooling is conducted to the room temperature, two times of tempering treatment including thermal treatment tempering at 880-900 DEG C and thermal treatment tempering at 530-560 DEG C for 1-2 hours are conducted, and finally aging treatment at 180-220 DEG C is conducted to obtain thepermanent magnet composite.

The invention discloses a preparation process of a solar cell. The preparation process comprises the steps of S1 arranging an intrinsic silicon layer on at least one surface of a silicon substrate; S2arranging a doping source layer on the intrinsic silicon layer; S3 enabling a doping source of the doping source layer at a position corresponding to the preset region of the intrinsic silicon layerto decompose doping ions, and enabling the doping ions to enter the preset region of the intrinsic silicon layer, forming a doped region in the preset region of the intrinsic silicon layer, and forming a silicon oxide protective layer containing the doping source in the doped region; and S4 removing the non-doped region, provided with the doping source layer, on the intrinsic silicon layer, and forming a locally doped silicon layer on at least one surface of the silicon substrate. According to the process, the polycrystalline silicon layer or the amorphous silicon layer is locally doped by laser, and the process is simple and feasible.

The invention relates to permanent magnet alloy and a preparing method thereof. The permanent magnet alloy is compounded by alloy I, alloy II, alloy III and an inorganic composite material IV, and the mass ratio of alloyIto alloyIIto alloyIII and to the inorganic composite material IV is 1: (1-1.5) : (0.2-0.6) : 0.01. The preparing method comprises the steps of material preparing, pressing and forming, sintering and heat treatment. According to the permanent magnet alloy and the preparing method thereof, the permanent magnet alloy has good thermal stability and good magnetic performance; the preparing method of the permanent magnet alloy is simple in technology, the production cost is low, and the permanent magnet alloy is suitable for industrialized production.

The invention discloses a device for separating and filtering pollens of fruits and vegetables, comprising a supporting mechanism, a smashing mechanism arranged at the upper end of the supporting mechanism, and a filtering mechanism arranged at the lower end of the smashing mechanism. A supporting plate of a square-plate structure is arranged at the lower end of the supporting mechanism. Four trundles are symmetrically arranged at the four corners of the lower ends of the supporting plate. Two supporting columns of square column structures are symmetrically arranged on the left and right sidesof the upper end surface of the supporting plate. According to the device for separating and filtering pollens of fruits and vegetables, the smashing mechanism is driven by the driving motor, so thatflowers can be smashed and decomposed in a smashing bucket, the direct contact between the human body and the pollens is avoided, the corrosive damage to the pollens is avoided, and the separating efficiency is high. The decomposed flowers sequentially pass through a filtering plate I and a filter plate II through the vibration action of a vibration motor in a vibration filter box, and residues larger than the size of the anthers and residues smaller than the size of the anthers are removed sequentially during this process, so that pure anthers can be obtained, and the purity of the pollens can be greatly improved.

The invention discloses a rare-earth modification material and a preparation method thereof. The preparation method comprises the preparation of a material A, the preparation of a material B, the preparation of a material C and the preparation of a material D; the material A, the material B, the material C and the material D are mixed and compacted to form a blank N, and sintering treatment and secondary tempering treatment are carried out on the blank N respectively to obtain the rare-earth modification material. The problems that a traditional preparation method is complex and an obtained rare-earth modification material is not high in overall performance are solved.

An optical waveguide (100) comprises a core (COR1), a buffer (BUF1) surrounding said core (COR1), and a cladding (CLD1) surrounding said buffer (BUF1), said core (COR1), said buffer (BUF1) and said cladding (CLD1) comprising silica glass, and the refractive index (nBU) of said buffer (BUF1) being substantially equal to the refractive index of pure amorphous silica glass. The buffer (BUF1) may reduce bubble formation during manufacturing and may facilitate splicing of the waveguide (100). The numerical aperture of the waveguide (100) may be fine-tuned by adjusting the radial dimension (b1) of the buffer (BUF1) in order to compensate variations in the refractive index (nCO) of the core (COR1).

The invention discloses a magnetic composite material and a preparation method thereof. The preparation method comprises the steps of preparation of a material A and preparation of a material B, preparation of a material C and preparation of a material D; and mixing the material A, the material B, the material C and the material D, and compacting to form a blank N; and carrying out sintering treatment and secondary tempering treatment on the blank N to obtain a rare-earth modified material. The problems that the traditional preparation method is complex and the comprehensive performance of theprepared magnetic composite material is not high are solved.

The invention discloses a gas-liquid isolating tank based on flexible transmission (hereinafter referred to as the gas-liquid isolation tank), and application of the gas-liquid isolating tank in a gas-liquid linkage actuator. The gas-liquid isolation tank comprises a tank body, an isolating skin bag, a gas in-out opening and a liquid in-out opening. An opening of the isolating skin bag is formed in the gas in-out opening or the liquid in-out opening in a sealed mode, and the isolating skin bag isolates an inner cavity of the tank body into a gas cavity and a liquid cavity. The gas-liquid isolating and flexible transmission gas-liquid isolation tank is used for replacing a traditional gas-liquid non-isolating tank (hereinafter referred to as the gas-liquid tank) of the gas-liquid linkage actuator, direct contact and mutual blending between high-pressure gas and hydraulic oil serving as a transmission medium in a system are thoroughly eliminated, thus the oil injection phenomenon of thegas-liquid linkage actuator in the using process is prevented, and the problems that in the processes such as design, layout, mounting, using, packaging and transporting of gas-liquid linkage actuatorproducts, the gas-liquid tank cannot be completely horizontally placed or levelly placed, and can only be vertically placed or obliquely upwards placed are solved.

The invention discloses a magnetic composite material and a preparation method thereof. The composite material is prepared by mixing and firing a material A and a material B. The weight ratio of the material A to the material B is 100: 3 to 6. The material A comprises, by weight, 1 to 3% of B, 25 to 28% of Nd, 1.8 to 2.2% of Ni, 0.008 to 0.013% of Ag, 0.08 to 0.12% of Ta, 2 to 5% of Tm, 0.1 to 0.5% of Be, 1.5 to 1.9% of Si and the balance of Fe. The material B consists of a substance (Na, Ca) 0.33 (Al, Mg) 2 [Si4O10] (OH) 2.nH2O, a substance Na2O.Al2O3.6SiO2 and ferric tetroxide, wherein the weight ratio between the three is 1: 0.2 to 0.6: 5. The magnetic composite material provided by the invention has high comprehensive magnetic properties. In addition, the materials are properly treatedduring preparation to ensure the uniformity of material composition, structure and properties, and to ensure the alloy quality. The material preparation process is simple. The cost of raw materials used for preparation is low. The process is simple. The produced material has good properties, is convenient for industrial production, and has a good application prospect in electric appliance industry.

A heating device having an improved heat resistance structure is provided. The heating device may include a heating element that generates heat, and an elastic conductive part that applies electricity to the heating element. A connector may be provided between the elastic conductive part and the heating element to preclude direct contact between the heating element and the elastic conductive part. The heating element may be fixed to one side of the connector, and the elastic conductive part may be fixed to the other side of the connector to allow current applied from the elastic conductive part to flow to the heating element.