旋转喷头

支撑架

涡轮压缩机

A high room temperature elongation of the wrought magnesium alloy and its preparation method

... 本发明本属于有色冶金领域，具体涉及变形镁合金及其制备方法，公开了种高室温延伸率的变形镁合金及其制备方法，提供种高室温延伸率的变形镁铝系合金，其化学成分为：Al≤2%，Mn≤0.2%,Ca≤0.4%,余量为镁，室温延伸率可以达到24%，在此基础上可以较为容易的完成轧制、挤压、冲压等塑形变形；同时提供种制备该合金的方法，即在纯镁锭中添加Al、Mn、Ca等元素，熔炼成镁铝合金，利用该方法制造的变形镁合金，晶粒细小均匀，性能优异，可用于航空、航天、电子和汽车等行业。 ...

Damping stair formwork for building construction and assembling method thereof

The invention discloses a damping stair formwork for building construction and an assembling method thereof, and belongs to the technical field of stair formworks, the damping stair formwork comprises a bottom plate, two side baffles and a plurality of fixed baffles, the two side baffles are fixedly mounted at the top of the bottom plate through bolts, and the fixed baffles are fixedly mounted at the top of the bottom plate; the device further comprises two fixing bases, two abutting plates and a plurality of bearing plates, the two abutting plates are located on the sides, away from each other, of the baffles on the two sides respectively, the two fixing bases are fixedly installed on the top of the bottom plate, and the two fixing bases are each provided with a moving assembly used for driving one abutting plate to move in the direction close to or away from the baffle on one side. The multiple bearing plates are located on the tops of the two fixing bases and distributed in the length ...

Transformer isolation type IGBT driving application circuit

The invention discloses a transformer isolation type IGBT (Insulated Gate Bipolar Translator) driving application circuit. Comprising a PWM signal input module, a first anti-phase module circuit, an integral module circuit, a second anti-phase module circuit, a first differential module circuit, a first shaping module circuit, a triode driving complementary output module circuit, a third anti-phase module circuit, a second differential module circuit, a second shaping module circuit, a transformer and a resistance attenuation module. A positive feedback module circuit; and an IGBT driving module circuit. A rising edge and a falling edge of an input PWM signal are modulated and demodulated, only the rising edge and the falling edge of the input end of the transformer are captured at the input end of the transformer, the input PWM signal is subjected to lossless reduction through positive feedback after the secondary side of the transformer is shaped through an inverter, and efficient transmission ...

Visual field display adjusting method for electronic outside rear-view mirror

The invention provides an electronic outside rear-view mirror visual field display adjusting method. The method comprises the steps that 1, the current front wheel steering angle of a trailer tractor is obtained; and step 2, adjusting the display visual field range of the electronic outside rear-view mirror according to the current front wheel steering angle. The visual field display of the electronic outside rear-view mirror can be automatically adjusted along with the steering of the tractor, and the driving safety is improved.

A protein as a reducing agent to gold nano particle preparation method

... 本发明公开了种以蛋白质为还原剂的金纳米粒子制备方法，包括：步骤1，在碱性条件下，利用蛋白质A还原金盐溶液中的金离子，得到制备Au(I)溶液；所述蛋白质A为胶原蛋白酶、糖化酶、胃蛋白酶、胰蛋白酶、溶菌酶中的至少种；步骤2，将Au(I)溶液、鲁米诺和双氧水混合均匀后，加入蛋白质B，得到所述的金纳米粒子；所述蛋白质B为牛白蛋白、牛血红蛋白、牛血清白蛋白、肌红蛋白、糖化酶、胃蛋白酶、胰蛋白酶和过氧化氢酶中的至少种。本发明公开的制备方法，所采用的实验条件温和、易于重复、简便易行，实现了批量合成分散性好、不同粒径、暴露晶面以(200)为主的球状金纳米粒子。 ...

Green energy-saving integrated prefabricated wall and construction method thereof

The green and energy-saving integrated prefabricated wall comprises a wall body, a first positioning piece and a second positioning piece, a through hole used for allowing a steel bar to penetrate through is formed in the side edge of the wall body, and the first positioning piece and the second positioning piece abut against the two opposite faces of the wall body correspondingly; at least part of the first positioning piece and at least part of the second positioning piece extend to the side edge of the wall body and are detachably connected to form a positioning cylinder, the positioning cylinder protrudes out of the side edge of the wall body, and a positioning channel communicated with the through hole is formed in the positioning cylinder. Matching of the wall body and the reinforcing steel bars can be conveniently completed, the first positioning piece and the second positioning piece are detached after positioning is completed, and it is avoided that parts are introduced into the ...

Spray-seeding equipment for restoration and treatment of ecological environment of mine

The invention relates to the field of mine ecological environment restoration and treatment, in particular to spray-seeding equipment for mine ecological environment restoration and treatment, which comprises a workbench, a stirring mechanism and a spray-seeding mechanism, and the top of the workbench is sequentially provided with the stirring mechanism and the spray-seeding mechanism from right to left. The slurry adhering to the inner wall of the flexible pipe can be shaken and thrown off in time through the arranged spray-seeding mechanism, the situation that the slurry adheres to the flexible pipe and affects next use of the equipment is prevented, and through cooperation of the arranged stirring mechanism and the spray-seeding mechanism, in the process of ecological restoration and treatment of the mine, the slurry can be uniformly sprayed on the inner wall of the flexible pipe. According to the spray-seeding machine, spray-seeding is carried out at the same time through the spray-seeding ...

But angle regulation's magnesium alloy smelting furnace

... 本实用新型公开了种可调节角度的镁合金熔炼炉，包括炉体，炉体的外侧中部分别设置有第固定块和第二固定块，且第固定块的侧通过转轴与支座连接，支座为U形，支座壁顶端设置有与转轴相适配的槽，且转轴套接于支座壁槽内，支座的另壁顶端设置有通孔，且支座另壁的顶部设置有弧形滑动槽，支座侧的转轴与步进电机连接。该可调节角度的镁合金熔炼炉，炉体设置有出料管，出料管与石墨坩埚内部连通与设置有弧形滑动槽、步进电机和滑动杆，有效的解决了在出料时，出料管道的吸热和粘连问题，也加强了在出料时的稳定性，操作简单，实用性强，对镁合金的加热好和利用率高，稳定性强。 ...

Cache amplifier

A cache amplifier includes an input stage including a first channel to receive a differential input and a second channel to receive the differential input; an intermediate stage including a first current source to receive an output of the second channel and electrically connected to a power source, a second current source to receive an output of the first channel and electrically connected to ground, and a floating current source electrically connected between the first current source and the second current source; and an output stage coupled to the intermediate stage to generate an output voltage. The shunt circuit is electrically connected between the first current source and the second current source for bypassing the floating current source. The method has the advantage of improving the stabilization time.