37results about How to "Suitable for automatic control" patented technology

The invention discloses a method for preparing ethyl eicosapentaenate (EPA) and ethyl docosahexaenoate (DHA) and relates omega-3 long-chain polyunsaturated fatty acids. The method comprises: preparing prepared solution to be separated by using a fish oil coarse raw material, which contains ethyl EPA and ethyl DHA, and using an organic solvent as a solvent; transferring the prepared solution to be separated into a material storage tube of a semi-prepared / prepared high-efficiency liquid chromatography-mass spectrum combined apparatus system, starting the semi-prepared / prepared high-efficiency liquid chromatography-mass spectrum combined apparatus system of which a mobile phase is aqueous solution of methanol or ethanol, balancing a chromatographic column, sampling automatically, separating and purifying ethyl EPA and ethyl DHA, and trigging a distillate collector by a mass spectrum online detection signal to collect pure ethyl EPA liquid and ethyl DHA liquid separately and automatically; and subjecting the pure ethyl EPA and ethyl DHA to reduced pressure concentration, extraction and reduced-pressure concentration respectively and thus obtaining ethyl EPA and ethyl DHA, of which the purities are both over 99 percent. The method is characterized by simple and convenient operation and high yield and is suitable for automatic control and synchronous separation.

The invention relates to a monitoring technology for the aquaculture environment of fresh-water fish and discloses a monitoring system for the aquaculture environment of the fresh-water fish on the basis of a wireless sensor network. The monitoring system comprises cluster head nodes connected with i nodes, wherein k cluster head nodes are connected with collecting nodes; m collecting nodes are connected with a monitoring center; and all i, k and m are natural numbers. The monitoring system is characterized in that the nodes, the cluster head nodes and the collecting nodes are configured with a water temperature sensor, a dissolved oxygen sensor, an aerator, a node processing module and a wireless transmission module. The collecting nodes also comprise an atmospheric pressure sensor, a PH value sensor and a communication module; the atmospheric pressure sensor, the PH value sensor and the node processing module are connected; and the communication module is connected with the wireless transmission module and is used for transmitting data to the monitoring center and receiving an instruction. The monitoring system disclosed by the invention can realize large-range wireless monitoring network layout, and is very suitable for automatic control of large-scale fresh-water aquaculture.

The invention discloses an aliphatic polycarbonate washing coagulation devolatilization method and a specific device thereof. The device according to the invention comprises: a polymerization kettle (1), a flash glue solution vessel, a coagulation system composed of more than one washing coagulation kettles (3), a solid-liquid separation system (4), a polymer drying system (5), a gear pump (6) and a connecting pipeline, wherein the polymerization kettle is provided with a product outlet at the lower part thereof and a gas outlet at the upper part thereof; the flash glue solution vessel is provided with an inlet and a gas outlet at the upper part thereof and a liquid outlet at the lower part thereof; and the washing coagulation kettle is provided with a washing coagulant inlet at the lowerpart thereof, a liquid inlet and a liquid outlet at the middle part thereof and a gas outlet at the upper part thereof. The method according to the invention has the advantages of: simple production technology, good suitability for automated control, continuous washing coagulation devolatilization; sufficient use of materials and energies, no gas-phase emptying in the process owing to the use of a closed vessel with pressure, very few solid-liquid wastes, complete ash removal and devolatilization of products, meeting the use demands in related fields, low industrial production cost and green chemistry standard-reaching industrialization process.

The invention discloses a fixture for steam turbine generator rotor coil vent hole machining. Two rotor coils are placed flat on a left die holder and a right die holder respectively, and are separated and positioned by a positioning check block. A lateral pressing air cylinder piston rod stretches out and draws back to drive a movable fulcrum pin shaft of a left oscillating bar and a movable fulcrum pin shaft of a right oscillating bar to motion, so that the left oscillating bar is driven to swing around a fixed fulcrum pin shaft of the left oscillating bar, and the right oscillating bar is driven to swing around a fixed fulcrum pin shaft of the right oscillating bar. A limiting block on the left side and a limiting block on the right side limit an opening of the left oscillating bar and an opening of the right oscillating bar to be consistent in size. The left rotor coil and the right rotor coil are tightly pressed or loosened at the same time through a lateral pressing head. An upward pressing air cylinder piston rod stretches out and draws back to drive an upward pressing head to move in a reciprocating mode along a positioning check block guide hole, so that the left rotor coil and the right rotor coil are loosened or tightly pressed in the vertical direction. The fixture for the steam turbine generator rotor coil vent hole machining is high in automation degree, high in work efficiency, strong in universality, simple in structure, reliable in operation, long in service life, and capable of greatly mitigating the labor intensity for an operator.

The invention discloses a permanent magnetic iron remover. The iron remover comprises a box body, a rotating shaft, a magnetic steel and a driving device, wherein the driving device is arranged in the box body; the rotating shaft is connected with the driving device; the box body comprises a base plate; the magnetic steel is connected with the rotating shaft; the magnetic steel and the rotating shaft are both arranged in the box body; the magnetic steel is arranged corresponding to the base plate. When the magnetic steel adsorbs external scrap iron through the base plate, the magnetic steel is rotated along with the rotating shaft, the magnetic line of the magnetic steel transfers, namely the magnetic line direction acting on the scrap iron is changed; when the magnetic force acting on the scrap iron is vanished or the magnetic force is smaller than gravity of the scrap iron, the scrap iron falls off from the base plate. The permanent magnetic iron remover can realize scrap iron falling off through transfer of the magnetic line of the magnetic steel. The permanent magnetic iron remover is low in energy consumption, convenient to use, high in working efficiency, and suitable for automatic control.

The invention discloses a rapid double-direction stop valve. The rapid double-direction stop valve comprises a valve body, an end cover and a valve rod. The end cover is fixed to the upper portion of the valve body, a seal lip stretching into the valve body is arranged on the end cover, a valve plug for dividing the interior of the valve body into an upper gas chamber and a lower gas chamber is movably arranged in the valve body, a gas hole communicating the upper gas chamber with the lower gas chamber is formed in the valve plug, and the valve rod stretches into the valve body from the lower portion of the valve body to be fixedly connected with the valve plug; a first gas opening communicated with the upper gas chamber is formed in the valve body, and a second gas opening communicated with the upper gas chamber is formed in the end cover; and the valve plug and the seal lip are matched to control the first gas opening and the second gas opening to be on and off. When the stop valve is opened and closed, axial pressure borne by the valve plug is reduced, opening and closing of the stop valve can be rapidly achieved through small driving force, and the service life of the valve plug is prolonged.

The invention discloses a wind tunnel device for continuous high-temperature sealing performance testing. The wind tunnel device is composed of an air compressor, a gas cylinder, a normal-temperaturepressure gauge, a stop valve a, a reducing valve, an air flow meter a, a pipeline type air heater, a stop valve b, a high-temperature thermometer a, high-temperature pressure gauge, a test section, anair flow meter b, and a high-temperature thermometer b. The air compressor pressurizes air and stores the processed air in the gas cylinder; the reducing valve adjusts the pressure; heating is carried out by using the pipeline type air heater; with the test section, a testing piece is fixed in a specific trench of the test section, the distance between an upper cover plate of the test section anda pedestal is changed by replacing adjusting gaskets with different dimensions so as to change the compression amount of the testing piece; and with the high-temperature thermometer a, the high-temperature pressure gauge, the air flow meter b, and the high-temperature thermometer b arranged in front of and in rear of a sealing device, sealing and heat insulating parameters of the testing piece onthe conditions of different compression amounts, different pressure differences, and different temperatures are obtained.