Iron ore auxiliary shaft multi-rope friction type lifting device and assembling method

The invention provides an iron ore auxiliary shaft multi-rope friction type lifting device and an assembly method, and relates to the technical field of lifting devices.The iron ore auxiliary shaft multi-rope friction type lifting device comprises a plurality of traction ropes and further comprises a traction detection mechanism and an alarm device.The traction detection mechanism comprises a base and a detection rod, and a plurality of mounting grooves are formed in the base in the length direction; the detection rods are hinged to the interiors of the multiple installation grooves, the ends, away from the installation grooves, of the multiple detection rods abut against the multiple traction ropes respectively, pressure switches are installed in the installation grooves, the detection rods are pressed at the control ends of the pressure switches, and the pressure switches are connected with the alarm device. According to the multi-rope friction type lifting device, on the basis of an ...

Graphene sensor with air spacing layer

The invention discloses a graphene sensor with an air spacing layer, which is formed by periodically arranging a plurality of units, and the structures of the units are the same; each unit comprises six layers, namely a silicon dioxide substrate layer, a metal reflector layer, an air layer, a graphene metasurface layer, an ionic gel layer and a silicon dioxide dielectric layer. By changing the height of the air layer, the impedance matching of the sensor is optimal, and better tuning is realized. Tuning of the sensor can be realized by changing the Fermi level of the graphene, and high sensitivity tuning capability can be realized. The absorption peak resonance frequency point can be selected by changing the dielectric environment of the air layer, the maximum frequency shift sensitivity can reach 700 GHz/RIU or above, under the condition that the absorption amplitude reaches the maximum absorption, the sensitivity still reaches 450 GHz/RIU or above, and the structure has high stability ...

Terahertz metal metasurface sensor based on bound state in continuum

The invention discloses a continuum bound state-based terahertz metal metasurface sensor, which is formed by periodically arranging a plurality of square metal metasurface units with the same structure, and is characterized in that each metal metasurface unit comprises a dielectric layer at the bottom, and a metal resonator layer covers the dielectric layer; the metal resonator layer is composed of a large resonant ring and a small resonant ring. When the to-be-detected object is arranged on the metasurface, the resonance frequency of the transmission spectrum of the metasurface can generate corresponding frequency shift, and the attribute of the to-be-detected object can be obtained by detecting the frequency shift degree of the resonance frequency.

Molecular sieve adsorption generated oxygen purity stable control device and control method thereof

The invention discloses a molecular sieve adsorption generated oxygen purity stable control device and a control method thereof, aims at providing a molecular sieve adsorption generated oxygen purity stable control device capable of quickly supplying qualified finished oxygen in valid time and greatly improving the reliability of medical molecular sieve oxygen generation equipment in the medical treatment industry, and also provides the control method of the molecular sieve adsorption generated oxygen purity stable control device, capable of guaranteeing the concentration of rear-end qualified finished oxygen. The molecular sieve adsorption generated oxygen purity stable control device comprises a pipeline (3) communicating oxygen generation equipment (1) and a finished oxygen storage tank (2), wherein a flow regulating valve (4), a flow buffering device (5), a primary oxygen concentration detector (6), a plurality of flow controllers (7) arranged in parallel, and a secondary oxygen concentration ...

EASY CUT RARE EARTH LEADED BRASS

The present invention relates to a kind of easy-cut rare earth leaded brass, the constituents of which (by weight) are: 57-60% Cu, 1.5-3.5% Pb, 0.05-1.2% rare earth and Zn residue; the impurities among them are: Fe less than 1%, Sn less than 0.5%, Al less than 0.6%, Sb less than 0.1%, Bi less than 0.003% and P less than 0.03%; the optimazed constitunts are: 58.5% Cu, 2.5% Pb, 0.06% of rare earth and Zn residue. Said product features fine crystal grain, small quantity of impurity, good physicochemical and machanical-processing properties, specially superior cutting property, being superior to the Japanese C3604, good hot-working property, the plasticity being 92-137% at temp. of 700-800 deg.C, and low cost.

EASY-TO-CUT RARE EARTH LEADED BRASS

Automatic counting control system of mine electric locomotive

The invention provides an automatic counting control system of a mine electric locomotive, and relates to the field of mine drawing counting of mine electric locomotives. An automatic counting control system of a mine electric locomotive comprises a counting assembly, the counting assembly comprises a coming vehicle judgment counting module and a vehicle in-place counting module, a first laser emitting end is aligned with a first laser receiving end, and the vehicle in-place counting module comprises a second laser emitting end and a second laser receiving end; the second laser transmitting end is aligned with the second laser receiving end, and the distance between the first laser receiving end and the second laser receiving end is the length of the mine electric locomotive; and the control assembly comprises a control module and a display module, the first laser emitting end, the first laser receiving end, the second laser emitting end and the second laser receiving end are all connected ...

Automatic water supply system and method for iron ore ground surface

The invention provides an iron ore earth surface automatic water supply system and method, and relates to the technical field of water supply. An iron mine surface automatic water supply system comprises a plurality of water supply sources, a plurality of high-level pools and a control unit. According to the iron mine surface automatic water supply system, the water supply relation between the water supply source and the corresponding water supply higher-position pond can be selected according to the liquid level of the water supply source and the liquid level of the high-position pond, and equipment operation can be effectively and stably guaranteed. In addition, the invention further provides an iron ore earth surface automatic water supply method which comprises the following steps that water level information of a water supply source is obtained, and then water level information of a high-level pool and cost information of the water supply source are obtained; judging and comparing ...