38results about How to "Limit contact" patented technology

The invention discloses a preparation method for a rolled magnesium-aluminum laminated plate preformed blank, and belongs to the technical field of metal composite plate preparation. The preparation method is characterized by comprising the following implementation steps that S1, a magnesium plate is placed into a heating furnace, and subjected to heat preservation for 0.5 h at the temperature of300 DEG C and annealing treatment; S2, an aluminum plate is placed into the heating furnace, and subjected to heat preservation for 1 h at the temperature of 350 DEG C and annealing treatment; S3, thesuperposed surface of the above magnesium plate and the above aluminum plate is ground and washed in the rolling width direction; S4, the aluminum plate is folded in half and bent, the magnesium plate is placed into the bent aluminum plate, and the bent end is fixed with an aluminum rivet to form a "sandwich" structure; and S5, the above "sandwich" structure combined blank is placed into the heating furnace, subjected to heat preservation for 10 min-30 min within the temperature range of 350 DEG C-400 DEG C, and then immediately placed into a press machine to be pressurized at a constant speed, or fed into a rolling mill to be rolled. The preparation method has the advantages that the temperature is carried out, and pressurizing is carried out, so that a tightly-attached pre-composite surface is formed between the magnesium-aluminum plates, the high-temperature oxidation of a to-be-composited interface in the hot rolling process is limited, and the cooperative deformation capacity ofbimetal is improved.

The invention relates to a positive electrode material for a lithium sulfur battery. The positive electrode material is a graphene doped porous hollow fiber, and the doping amount of graphene is 0.005-0.2% of the total mass of the positive electrode material; the porous hollow fiber is a porous hollow tubular structure, the external diameter of the tube is 80-1000nm, the internal diameter of the tube is 30-400nm, and the aperture of pores on the sidewall of the tube is 2-80nm; and graphene is embedded into the sidewall of the porous hollow fiber tube. A battery assembled by adopting a positive electrode made by using the positive electrode material has high discharge specific capacity and good cycle stability.

The invention belongs to the technical field of mechanics test devices, and specifically relates to a high-energy accelerator CT rock mechanics test system. The high-energy accelerator CT rock mechanics test provided by the invention comprises a mechanics test machine, a high-energy accelerator CT ray source and a detector, the mechanics test machine is arranged between the high-energy acceleratorCT ray source and the detector, the mechanics test machine comprises a fixed component, a rotary apparatus and a pressure chamber, the rotary apparatus is arranged on the fixed component, the pressure chamber is connected with the rotary apparatus, and when a test is executed, the pressure chamber can rotate relative to the fixed component under driving of the rotary apparatus. The test machine is provided with the rotary apparatus, and when the test is executed, the pressure chamber is driven by the rotary apparatus to rotate, namely, a test sample can be scanned in a process in which a loadtest is executed for the test sample, consequently, CT imaging can completely reflect a structural state of the test sample when the test sample is loaded, and scientific researches are facilitated more.

The invention discloses a method for enhancing the performance of LaNi4.8Al0.2 alloy to resist CO, CO2 and air poison and the anti-pulverization performance of the alloy, which comprises the steps of S1: preparing LaNi4.8Al0.2 alloy powder; S2: sieving the LaNi4.8Al0.2 alloy powder; S3: mixing ethyl alcohol with deionized water to obtain a mixed solution; S4: adding concentrated hydrochloric acid to adjust the pH value and obtain a first mixture; S5: mixing tetraethoxysilane with ethyl alcohol to obtain a second mixture; S6: mixing the first mixture with the second mixture to obtain a third mixture; S7: standing, and heating the third mixture to volatilize the ethyl alcohol; S8: adding hydrophilic gaseous phase silicon dioxide to the third mixture so as to obtain a silicon dioxide sol; S9: adding the LaNi4.8Al0.2 alloy powder to the silicon dioxide sol so as to obtain paste; S10: heating and drying the paste. According to the method disclosed by the invention, the problem that the LaNi4.8Al0.2 alloy is poor in anti-pulverization performance and poor in anti-poison capability is solved, the use stability of the LaNi4.8Al0.2 alloy is enhanced, and the service life of the LaNi4.8Al0.2 alloy is prolonged.

The invention relates to a partition plate used for a window air conditioner, and the window air conditioner. The partition plate (10) used for the window air conditioner (AC) is provided according to one aspect of the invention. The window air conditioner (AC) comprises a bottom plate (81) and a fan (82). A flow guide ring (20) is arranged on the partition plate (10). Fan blades of the fan (82) correspond to the flow guide ring (20). The partition plate (10) is provided with a water flying preventing structure (WP) suitable for limiting accumulated water on the bottom plate (81) from splashing towards the outside of the window air conditioner (AC). According to the other aspect of the invention, the window air conditioner (AC) comprising the partition plate (10) is provided. According to the partition plate used for the window air conditioner, and the window air conditioner, the problem that water splashes when the window air conditioner operates under a humidity-state working condition can be solved or relieved.

The invention discloses lead alloy for high-temperature heat treatment and with anti-oxidation and evaporation-resistance characteristics and a processing technique thereof. The lead alloy is preparedfrom, by weight, 1.0-2.0 wt.% of Ca, 0.5-1.2 wt.% of Os, 0.8-1.5 wt.% of Sb, 2.0-4.0 wt.% of Y, 1.2-1.8 wt.% of Ba, 0.2-0.4 wt.% of Eu and the balance Pb. The lead alloy for austenitizing heat treatment has a promoting effect on improving the independent research and development of novel high-quality materials in China and occupying the international market of novel high-quality materials.

The invention discloses a method for enhancing air poison resistance of Zr2Fe alloy. The method for enhancing the air poison resistance of the Zr2Fe alloy includes steps: S1, simultaneously loading Zr2Fe alloy particles and stainless steel balls into a stainless steel vacuum ball milling tank, and connecting the stainless steel vacuum ball milling tank with a hydrogen storage performance test system; S2, pumping gas out of the stainless steel vacuum ball milling tank, and inflating the stainless steel vacuum ball milling tank with argon gas; S3, performing ball milling on the Zr2Fe alloy particles; S4, inflating the stainless steel vacuum ball milling tank with the argon gas, and passivating the Zr2Fe alloy particles; S5, placing the stainless steel vacuum ball milling tank into a glove box, controlling air inflow of air, and exposing Zr2Fe alloy powder to air; S6, sieving the Zr2Fe alloy powder; S7, preparing silicon dioxide sol; S8, adding the Zr2Fe alloy powder into the silicon dioxide sol and stirring the Zr2Fe alloy powder so as to form cream; S9, heating and drying the cream. The method for enhancing the air poison resistance of the Zr2Fe alloy solves the problem that the Zr2Fe alloy is poor in air poison resisting ability, strengthens use stability of the Zr2Fe alloy, and prolongs use life of the Zr2Fe alloy.

The invention discloses a Sn-Mn-containing bismuth bath alloy for heat treatment and with excellent heat transfer performance and a processing technology of the Sn-Mn-containing bismuth bath alloy. The Sn-Mn-containing bismuth bath alloy comprises, by weight percentage, 1.0-1.8 wt.% of Ba, 4.0-6.0 wt.% of Sn, 0.5-1.0 wt.% of Mn, 0.2-0.5 wt.% of Sc, 0.2-0.3 wt.% of Sm, 1.0-2.0 wt.% of Ni and the balance bismuth. The bismuth bath alloy is used to replace a lead bath alloy for heat treatment, so that the contact between a steel wire and air is limited, and decarburization is prevented; and compared with a common heating method, the hardness of the steel wire surface is improved, the possibility of crack formation and spreading is reduced, and the fatigue performance of the steel wire is improved.

The invention provides a preparation method and application of a rare earth yttrium-doped alumina nano-material, comprising: step 1, preparing an aluminum sulfate solution; step 2, preparing a sodium metaaluminate solution; step 3, adding the sodium metaaluminate solution dropwise into the aluminum sulfate solution to obtain a suspension; step 4, aging the suspension to obtain a white precipitate; step 5, washing the white precipitate; step 6, washing the white precipitate and hexadecyl triethyl Ammonium bromide is added to water to obtain a mixed solution; step 7, adding rare earth yttrium nitrate to the mixed solution to obtain a rare earth mixed solution; step 8, performing static crystallization on the rare earth mixed solution, and then drying to obtain rare earth yttrium-doped alumina Precursor of nanomaterials; step 9, calcining to obtain rare earth yttrium-doped alumina nanomaterials, and using it to adsorb arsenic in water. The nanometer material prepared by the invention has the properties of uniform doping and uniform crystal pore size, can be used to adsorb arsenic in water, and has good application prospects.

An electric arc furnace (10) having a partially insulated electrode (37) produces molten metal (28) such as foundry iron from an iron source where little or no slag (30) is produced. The furnace (10) includes at least one insulated electrode (37) for immersing deep into the metal charge (26). An insulating coating can be a fibrous mat (48) wrapped around the electrode or a spray coating (72). In one embodiment, the electrode (156) has a coupling (172) at a first end (176) for coupling with an electrically conducting member (142) and a coupling (172) at the second end (178) for coupling with an adjacent electrode to form an electrode column. The coupling members (172) can be an internally threaded recess (166, 168) in the ends thereof. An externally threaded coupling member (172) can be threaded into the recesses (166, 168) of the electrodes (157) for coupling two or more electrodes (157) together.

The invention discloses a lead-free In-containing and Ta-containing bismuth bath alloy for troostite heat treatment and a processing technology thereof. The lead-free In-containing and Ta-containing bismuth bath alloy comprises, by weight, 1.0-1.5% of Ba, 0.2-0.4% of In, 0.6-1.2% of Ta, 0.4-0.6% of Sc, 0.2-0.3% of Sm, 1.0-2.0% of Co, and the balance bismuth. The bismuth bath alloy is used for replacing a lead bath alloy for heat treatment, the contact between steel wires and the air is limited, and decarburization is prevented. Compared with an ordinary heating method, the hardness of the steel wire surface is improved, the possibility of crack formation and expansion is reduced, and the fatigue property of the steel wires is improved.

The present invention proposes a T-shaped guide rail fall arrester, which includes a main body, a first movable body, a hinge mechanism and a locking part. There is a cavity on the side. The first movable body includes a first movable part and a first trigger part. The first movable part is slidably connected to the upper surface of the first fixed part and can move horizontally in the direction of the second fixed part. The locking part is located in the cavity. In the groove, the locking part has a movable end, and the movable end can rotate clockwise or counterclockwise around the horizontal line between the abutment surface and the end surface of the guide rail facing the wall; when the guide rail falls freely, through the friction force and the downward impact force It will cause the trigger part to move away from the wall, drive the movable end to screw into the first space and approach the second fixed part, and press the movable end, so that the flange plate of the guide rail is fixedly clamped between the movable end and the second fixed part. Between the two fixed parts, the purpose of preventing the guide rail from falling is realized.