364 results about "Closed circuit" patented technology

The application discloses a gear time-varying meshing stiffness measurement method, which comprises the following steps: S1, a measurement model between current and time-varying meshing stiffness is established based on Hertz contact theory and Ishikawa formula; S2, a closed circuit is formed by connecting a driving gear, a driven gear and a power supply in series, and time-varying current of the circuit is measured; and S3, the time-varying current measured in S2 is substituted into the measurement model to obtain time-varying meshing stiffness of the gear. The application improves the measurement precision and efficiency of the gear time-varying meshing stiffness.

The invention discloses a temperature-variable superconducting magnet low-temperature testing system and method, and relates to the technical field of superconducting magnet low-temperature testing. The system specifically comprises a superconducting magnet circulation loop which is configured to be communicated with a superconducting magnet to be tested to form a closed circulation channel for helium flow; the heat exchanger is arranged in the superconducting magnet circulation loop and is configured to cool helium in the superconducting magnet circulation loop through heat exchange with an external low-temperature medium; the helium circulating pump is arranged in the superconducting magnet circulating loop and is used for driving helium to perform forced flow circulation in the closed-loop circulating channel; the temperature control assembly comprises a heater arranged in the superconducting magnet circulation loop; wherein the flow and the temperature of helium entering the superconducting magnet to be tested are controlled by adjusting the helium circulating pump and the heater. The invention aims to design a test system which does not need an expensive refrigerator, is simple and convenient to operate and can realize accurate control of a wide temperature zone and a forced flow cooling environment.

An open and closed circuit parallel drive system and a control method based on a four-chamber hydraulic cylinder are provided. The system includes: a closed pump-controlled drive unit and an open valve-controlled drive unit. The four-chamber hydraulic cylinder is driven by the open valve-controlled drive unit with a large load power, and the operating velocity and displacement of the four-chamber hydraulic cylinder are controlled by the closed pump-controlled drive unit with a small load power, thereby improving the linearity and stability of the four-chamber hydraulic cylinder control and reducing the system installed power and throttling loss.

A portable emergency response kit designed for rapid intervention in opioid overdose or cardiac arrest scenarios comprises a durable case with compartments for specific medical devices, such as opioid overdose treatment medication or an Automated External Defibrillator (AED). The case features a breakable closed circuit that is, upon opening, triggered to send a signal to notify emergency medical services (EMS) or predefined contacts of the kit's location.The system utilizes GPS module and may include dual-mode communication capabilities for reliable alert transmission in various environments. Additional features may include a transparent case material for visual confirmation of contents, tamper-evident seals, QR codes linked to instructional content, and a battery power source. The kit is designed to be user-friendly, incorporating ergonomic elements and optional accessories for enhanced portability and storage, ensuring rapid and effective response in critical situations.

The invention belongs to the field of preparation of high-end carbon materials, and relates to a method for desulfurizing high-sulfur petroleum coke. The core of the invention is to construct a'desulfurization-acidification-regeneration 'three-step closed cycle system. The system takes magnesium oxide as a circulating medium, firstly magnesium oxide reacts with sulfur in petroleum coke at a high temperature to be converted into magnesium sulfide, then sulfur is released and recovered through an acidification step, meanwhile magnesium is converted into an intermediate product magnesium hydroxide, and finally, the magnesium medium is recovered to be active through a thermal regeneration step, magnesium oxide is obtained, and circulation is completed.

The utility model relates to agricultural implement technical field and disclose agricultural land dosing device, including medicine jar, the upper end fixed mounting of medicine jar has the jar cover, the upper end fixed mounting of jar cover has the metering pump, the big upper surface fixed connection of metering pump has the medicine outlet pipe, the lower surface fixed connection of metering pump has the medicine inlet pipe, the lower end fixed mounting of medicine inlet pipe has the filter core, the utility model is provided with automatic dosing device, automatic water device, automatic stirring device, when the medicine liquid in medicine jar is consumed, the float ball pulls apart the medicine box bottom filled with medicine on one hand, makes the medicine enter the medicine jar, presses the switch on one hand, and circuit forms the closed circuit, and solenoid valve opens, and the water flow enters the medicine jar through the water inlet pipe, and the water flow falls vertically and impacts the stirring paddle, and the medicine in the medicine jar is stirred and mixed, can supplement the medicine liquid in time, also can greatly reduce the operation pressure of farmer.

Rotating electric machine (1) with a central longitudinal axis (1C), comprising: a stator (100) comprising armature coils (104) wound around the stator (100) with concentrated winding, the armature coils (104) being configured to generate magnetic flux when excited; and a rotor (300) which is rotatable about the central longitudinal axis (1C) in response to the flow of the magnetic flux, wherein the rotor (300) comprises a plurality of salient poles (302) which are wound by rotor windings (330) which are capable of inducing at least one induced current when the magnetic flux couples with the rotor (300), wherein the rotor (300) comprises at least one rectifier circuit (C1 to C6), wherein the rotor windings (330) are wound such that the salient poles (302) can operate as electromagnets whose magnetization directions are alternately reversed along an arc length of a circle around the central longitudinal axis (1C), wherein each rectifier circuit forms a closed circuit consisting of a group of rotor windings (330), wherein in each group some of the rotor windings (330), whose current phases of the induced current are the same, are connected in series with a rectifier element (D1 to D8), wherein the rotor windings (330) are either divided into four groups such that in each group all rotor windings (330) are connected in series with a rectifier element to form a rectifier circuit or the rotor windings (330) are divided into two groups such that each group comprises several series circuits, of which a first and a second series circuit are connected in parallel and each of these first and second series circuits is connected in series with a rectifying element.

The invention discloses a closed cycle utilization method of a zirconium-based arsenic removal agent. The method comprises the following steps: (1) taking zirconium sulfate as the arsenic removal agent used for the first time; the roasted material prepared in the step (4) is adopted as an arsenic removal agent for follow-up recycling; adding an arsenic removal agent into the arsenic-containing acid liquid and / or zirconium arsenate thin slurry, and carrying out solid-liquid separation to obtain arsenic-removed slag and arsenic-removed liquid; (2) mixing the arsenic-removed liquid with macroporous composite exchange resin, and carrying out zirconium removal reaction to obtain zirconium-loaded resin and purified liquid; (3) mixing the zirconium-loaded resin with the arsenic-containing acid solution, and separating resin particles from the slurry containing the zirconium arsenate precipitate by using a solid-liquid separation device to obtain regenerated resin and zirconium arsenate thin slurry; (4) mixing the arsenic-removed slag with a sulfuric acid solution and elemental sulfur, carrying out a reduction roasting reaction to obtain a roasted material, and condensing gas released by the reaction to obtain a mixture of sulfuric acid and arsenious acid; and (5) cooling the mixture of sulfuric acid and arsenious acid, and carrying out centrifugal separation to obtain arsenic trioxide solid and a sulfuric acid solution.

A method for operating a radio frequency energy harvester (RFEH) comprises, for each rectifier of the RFEH having connected thereto a switching device configured to be actuated between an open state in which an output of the rectifier is open-circuited to form part of a combined DC output voltage and a closed state in which the output of the rectifier is short-circuited to be omitted from the combined DC output voltage, measuring a voltage difference between the rectifier's input and output, comparing the voltage difference to a voltage threshold, when the voltage difference is below the voltage threshold, causing the switching device to be actuated to the closed state, and when the voltage difference is greater than or equal to the voltage threshold, causing the switching device to be actuated to the open state.

This invention relates to the field of mineral processing technology, specifically to an environmentally friendly copper-molybdenum separation inhibitor, its preparation method, and its application. The method includes: mixing starch and formamide, stirring at room temperature, cooling in an ice-water bath at -5°C, slowly adding chlorosulfonic acid at this temperature to initiate a sulfonation reaction, neutralizing to pH 7-8 with sodium hydroxide solution after the reaction, adding anhydrous methanol to precipitate the product, and washing and drying to obtain the sulfonated anionic starch polymer DGSS. The inhibitor is applied to the flotation separation of copper-molybdenum mixed concentrates, combined with a closed-circuit process of one roughing, one scavenging, and four cleaning stages, employing a gradient reagent reduction and staged kerosene replenishment system from roughing to cleaning. This allows for selective inhibition of copper sulfide minerals such as chalcopyrite at extremely low dosages, with minimal impact on the floatability of molybdenite. It completely avoids the use of toxic substances such as cyanide, Knox reagent, or sodium sulfide, exhibiting good selectivity, low reagent consumption, environmental friendliness, and a simple preparation process that is easy to industrialize.

A card capable of measuring ECG signals includes a card body, a control unit, an electronic control unit, a conduction unit, an ECG signal processing unit, a storage unit, a link unit and a light source processing unit. The card allows a person to be tested to touch the conduction unit simultaneously with the fingers of both hands, so that a closed circuit is formed between the heart of the person to be tested, the arms of the person to be tested, the conduction unit and the ECG signal processing unit, so as to carry out the measurement of the heart rhythm, the ECG data generated after measurement is stored in the storage unit, the reading device reads the ECG data through the link unit, relevant signals are generated to the light source processing unit for a light source demonstration during the measurement process and after measurement.

This system provides a detection system for longitudinal belt tearing in a belt conveyor that can provide early information, immediately stop operation, and minimize belt tearing. [Solution] A detection wire 2 is stretched directly below the belt B along the carrier-side roller C of the downstream belt conveyor A2 of the loading section of the belt conveyor, and connecting wires 3 and 4 are stretched near the side of the belt B. The detection wire 2 and the connecting wires 3 and 4 are connected by a detachable connector 1 that detaches when tension is applied, forming a single loop closed circuit, a first circuit X, and a second circuit Y that supplies power to the first circuit X. The system is configured such that the second circuit Y detects that the first circuit X has been cut when the detection wire 2 is cut or the detachable connector 1 comes off due to contaminants T in the conveyed material S, and then issues an appropriate alarm.

The utility model discloses a closed circulating breathing diving outfit capable of underwater communication, which comprises a front chest part and a back part, shoulder straps are arranged between the front chest part and the back part, and a storage assembly is arranged at the outer end of the front chest part and is used for facilitating storage and wearing of the outfit and placement of a communication module; the breathing system is arranged on the outer side of the back, and the breathing system is used for achieving internal circulation operation of breathing and controlling the oxygen content of breathing gas. The utility model belongs to the technical field of diving devices, and particularly relates to a closed type circulating breathing diving device capable of achieving underwater communication.

This invention provides an ultrasonic-gradient magnetic field synergistic treatment device and method for edible liquids, relating to the field of edible liquid processing technology. The device includes an ultrasonic treatment unit, a gradient magnetic field treatment unit, and a closed-loop enhanced circulation unit connecting the two. The ultrasonic treatment unit is used to cavitation the liquid; the gradient magnetic field treatment unit includes a magnetization channel and a magnetic field generating component, the magnetic field generating component being used to form a continuously varying magnetic field distribution along the liquid flow path within the magnetization channel; the closed-loop enhanced circulation unit is used to create a directional circulating flow of the liquid between the ultrasonic treatment unit and the gradient magnetic field treatment unit, ensuring that the liquid passes through the ultrasonic action area at least twice within one circulation cycle, thereby allowing the liquid to alternately receive ultrasonic and gradient magnetic field effects during circulation, forming a nonlinear cumulative synergistic treatment effect. This invention helps improve the uniformity and processing effect of edible liquids.

This invention discloses a beneficiation method for iron, boron, and uranium minerals in uranium-boron iron ore, which has the following characteristics: 1. The three-stage closed-circuit crushing product is laminated and pulverized using a high-pressure roller mill, so that the -5mm particle size content in the crushed product is greater than 70%. By utilizing the technology of multiple crushing and less grinding, the energy consumption of beneficiation can be reduced and the grinding efficiency can be improved; 2. Iron concentrate is obtained by staged grinding and staged magnetic separation. The tailings of iron beneficiation, such as the tailings of coarse magnetic separation, primary magnetic separation, and secondary magnetic separation, are subjected to stepwise gravity separation to obtain uranium concentrate and boron concentrate in stages, thereby improving the recovery rate of B2O3 and U in the boron and uranium concentrates and comprehensively utilizing iron, boron, and uranium resources; 3. The uranium minerals in the iron beneficiation tailings are separated by a combination of Nelson centrifugal concentrator, shaking table, and suspended cone concentrator, thereby improving the U recovery rate in the uranium concentrate. The Nelson centrifugal concentrator can be used for roughing of uranium minerals, the suspended cone concentrator can recover fine-grained uranium minerals, and the shaking table can recover relatively coarse-grained uranium minerals.

This invention relates to the field of finite element analysis technology, and provides a method for designing and constructing cast-in-place piles using a single-sided open-closed temporary casing based on finite element analysis. The method includes importing constitutive parameters of soft rheological silt into computer-aided engineering nonlinear finite element software to establish a spatial mesh model of the single-sided open-closed temporary casing with upper and lower reinforcing cylinder ends and a central standard cylinder; applying high-order friction penalty function contact constraints to the sliding pin, tension rod flange, and positive and negative labyrinth joints; sequentially loading three dynamic simulation conditions: pressing, holding, and large deformation during pull-out; outputting a solid manufacturing data table based on the simulation results of the three dynamic simulation conditions; constructing a closed-loop mud circulation system to maintain head balance; and achieving low-damage pull-out and demolding. This invention combines simulation-driven design, structural optimization, and refined construction control, significantly improving the reliability, efficiency, and pile quality of cast-in-place pile construction in soft rheological strata.

The application discloses a kind of short process gold extraction devices of waste printed circuit board.It includes separation module, collection module and electrodeposition part.Separation module contains leaching tank, and leaching liquid and cleaning liquid are alternately introduced, and leaching process is strengthened using micro-bubble generator and heater, so that gold foil is stripped from the surface of circuit board;Collection module contains filter and temporary storage tank, for intercepting and collecting gold foil and classifying temporary storage liquid;Electrodeposition part is connected to temporary storage tank, and copper in leaching solution is recovered through electrodeposition tank, and tail liquid flows back to leaching tank to realize closed circuit circulation.The application adopts integrated design, and combines selective leaching and physical interception by micro-bubble strengthening, without complex high-temperature or cyanide equipment, and one step realizes efficient stripping of gold and electrolytic recovery of copper;At the same time, leaching solution is closed circuit, and cleaning liquid is recovered in stages, which significantly shortens the process flow, reduces equipment investment and environmental pollution.

The invention relates to the technical field of mineral processing, in particular to a closed-loop reselection process and system for recovering ilmenite from strong magnetic tailings. According to the invention, strong magnetic tailings are creatively intercepted after coarse grain strong magnetic scavenging operation of a main process, and are guided to enter a set of independent and closed-circuit gravity separation system. According to the system, ilmenite is recycled through gravity separation, internal efficient closed-loop circulation is achieved through middling returning and size grading control, and the titanium metal recycling rate and the concentrate quality are remarkably improved.

The application discloses a kind of high oxidation rate lead-zinc oxide ore aerated sulphidation flotation and tailings discharge process, belong to mineral processing technical field.The method includes the following steps: grinding to lead-zinc oxide ore raw ore, obtain slurry;Sodium sulfide is added to slurry, and under the condition of aerated stirring, sulphidation reaction is carried out, and sulphidation slurry is obtained;Collector and foaming agent are added to sulphidation slurry, and flotation is carried out, and lead concentrate and zinc concentrate are obtained.The application introduces forced aerated stirring in the sulphidation process, strengthens the mass transfer process among gas-liquid-solid three phases, promotes the generation of dense, stable lead sulfide film on the surface of lead oxide minerals, solves the problem of low sulphidation efficiency of traditional sulphidation process.The application is used to treat refractory lead-zinc oxide ore containing Pb 5.59%, Zn 44.02%, oxidation rate more than 90%, and closed-circuit test can obtain qualified lead concentrate with lead grade of 60.72% and lead recovery rate of 79.53%, while lead flotation tailings directly become zinc concentrate with zinc grade of 46.33% and zinc recovery rate of 98.41%, realizing efficient separation of lead and zinc and tailings discharge.

This invention relates to a screening and crushing system for waste catalysts in residual oil, belonging to the field of screening equipment technology. It integrates intelligent metering and feeding, grading and screening, closed-loop crushing, high-efficiency stirring output, and centralized control and environmental purification units. Through a closed-loop process of "screening-crushing-re-screening," it ensures that the finished product particle size meets standards. The core innovation lies in installing pressure and acoustic sensors on the conveyor belt of the vibrating screen's discharge section. Real-time quantitative monitoring of the screen clogging rate is achieved by cross-validating the impact dynamics spectrum of the discharge material with the acoustic characteristic modes. The entire system adopts an explosion-proof design and is equipped with an emergency feeding port and a flue gas treatment system. This invention has advantages such as high automation, accurate metering, real-time diagnosis of screen status, safety and environmental protection, and strong production continuity.

A processor (51) executes: calculation processing for calculating an impedance (ZmB, ZmB1-ZmB4) to be measured, which is a complex impedance of a storage battery (10, 100A-100D) when an alternating current is caused to flow in a closed circuit including the storage battery; and correction processing for correcting the calculated impedance to be measured on the basis of a correction value (ΔZ, ΔZ1-ΔZ4) for reducing the influence exerted on the impedance to be measured by a mutual inductance (M2) between a current flow path inside the storage battery and the closed circuit when the alternating current is caused to flow in the closed circuit.

The application relates to a closed-circuit open-circuit complementary circulating air screening sand making process sand making building, which comprises a sand making machine, an air screening and screening unit, a blower, a fine sand recycler, a cyclone powder collector and a pulse dust collector. The air screening and screening machine of the air screening and screening unit comprises an air screening chamber, and a feeding port, an air inlet, a discharging port, a supplementary air inlet and two air outlets are arranged on the air screening chamber. The blower is communicated with the air inlet of the air screening chamber through an air inlet pipeline. One air outlet of the air screening chamber is communicated with the inlet of the fine sand recycler through a first pipeline. The air outlet of the fine sand recycler is communicated with the air inlet of the cyclone powder collector through a second pipeline. The air outlet of the cyclone powder collector is communicated with the air inlet of the blower through a third pipeline, forming a circulating channel. The other air outlet is communicated with the air inlet of the pulse dust collector through a fourth pipeline. The closed-circuit open-circuit complementary circulating air screening sand making process sand making building has the characteristics of flexible control of the air volume of the air screening and screening system, flexible regulation and control of the powder content of the finished sand, low equipment cost and low energy consumption.

Foot massaging shoe including a push button into the side of the outsole. The shoe contains a cavity in the sole to allow for an ON / OFF switch, servo motor, rechargeable battery, and motor that together form a closed circuit. The shaft of the motor is attached to a pendulum that includes a main rod connected to three lateral rods. Each of the lateral rods has a massage ball formed at its distal ends. The pendulum rotates about the rotary axis of the shaft in a semicircular fashion from 0 to 180 degrees and back when the push button is pressed, and will stop when the push button is pressed again, such that the three balls move up out of the sole surface to brush up into and laterally across the plantar foot surface of the shoe wearer, and then back down into their respective cavities during the semicircular motion.

The invention belongs to the field of iron and steel smelting, and particularly discloses a sintering system and method for flue gas closed cycle. According to the system, an ignition heat preservation furnace and a flue gas cover are sequentially arranged above a sintering machine, an air bellow is arranged below the sintering machine, flue gas generated by sintering can be fed into a high-temperature section of a circular cooler through the air bellow and an exhaust fan to exchange heat with high-temperature materials, and waste gas obtained after heat exchange is conveyed back to the ignition heat preservation furnace and / or the flue gas cover for waste heat utilization. And meanwhile, cold air is introduced into the low-temperature section of the circular cooler through an air blower for heat exchange and then introduced into the medium-temperature section for heat exchange, and finally waste gas of the medium-temperature section is conveyed to an ignition heat preservation furnace and / or a smoke hood for waste heat utilization. Furthermore, the waste gas for waste heat utilization can be introduced into different sintering positions according to the temperature gradient, so that the waste heat utilization is more efficient. According to the system and the method, the utilization rate of the waste heat of the sintering flue gas can be greatly increased, pollution caused by direct exhaust of the flue gas is reduced, and the system and the method have extremely high industrial application value.

The invention provides a beneficiation method for recovering scheelite from low-grade tailings, and belongs to the technical field of ore separation processes. According to the method, the tungsten-containing tailings which are low in grade, low in value and difficult to recover are converted into valuable and easy-to-recover ore resources at low cost through the magnetic separation / centrifugal machine reselection combined physical mineral separation technology, and the reagent cost of subsequent flotation is greatly reduced. Then carrying out a flotation test, and discarding tailings of flotation middlings by adopting a centrifugal machine so as to remove gangue which is easy to float and argillization and avoid continuous circulation and accumulation of the gangue in a closed circuit to influence the floating of target minerals and the quality of concentrate; meanwhile, a nontoxic and environment-friendly gangue inhibitor CD-6 is adopted and matched with a CK-3 composite collecting agent, efficient separation of gangue minerals and tungsten minerals is achieved, finally, comprehensive recycling of extremely-low-grade tungsten-containing tailing resources is achieved, and a new effective method is provided for development and utilization of similar tungsten-containing tailing resources.

The invention relates to a method for deep defluorination and fluorine recycling of an electrodeposited zinc leaching solution, and belongs to the technical field of hydrometallurgy and resource recycling. Aiming at the industrial problems of poor production stability, serious equipment corrosion, cathode passivation and the like caused by circulating enrichment of fluorine ions in a zinc hydrometallurgy system and the defect that an existing fluorine removal technology cannot realize effective open circuit and resource recovery of fluorine elements, the invention provides a synergistic process system of targeted adsorption, mild desorption and directional precipitation. A high-performance composite adsorption material is applied, and a multi-stage countercurrent adsorption, efficient desorption regeneration and closed-loop precipitation recycling technology is designed. According to the method, efficient selective removal of fluorine ions is achieved in a zinc hydrometallurgy system, fluorine elements are opened and recycled in the form of calcium fluoride products, and a circulating chain of fluorine is thoroughly broken. The method is high in process compatibility, low in operation cost and free of secondary pollution, and a solution is provided for green upgrading and resource circulation of the zinc hydrometallurgy industry.

The invention relates to a magnet device (11) for a magnetic resonance apparatus (10), the magnet device (11) comprising: a superconducting magnet (12); a discharge system (35); a switch (37) which is designed to interrupt a closed circuit in the superconducting magnet (12) and to transfer electrical energy which has accumulated in the superconducting magnet (12) to the discharge system (35); wherein the discharge system (35) comprises a supercapacitor (30) which is designed to buffer the electrical energy transport from the superconducting magnet (12) to the discharge element in the discharge system (35).

The invention discloses a crawler-type magnetic motor applied to axial closed-circuit and open-circuit magnetic fields. The axially-magnetized annular planetary permanent magnets have the magnetic attraction effect on the inner edge face of the pressure-bearing type oval steel crawler belt, two radial magnetic potential included angles on the upper side and the lower side of the inner edge of the crawler belt are formed, side magnetic poles of the planetary permanent magnets at the lower side included angles are attracted by heteropole permanent magnets, the magnetic field of the planetary permanent magnets is in a closed circuit, the magnetic force on the crawler belt disappears, and the crawler belt is in a follow-up state; the side magnetic pole magnetic field of the planetary permanent magnet at the upper included angle is in an open state, and the outer edge of the large circular section of the track on the side is temporarily fixed at the inner edge of the stator under the attraction of the rotating permanent magnet to form a radial magnetic potential for pulling the circular planetary permanent magnet and the track to roll together along the inner edge of the stator; the closed magnetic action environment causes the crawler belt to roll circularly to drive the output shaft to rotate and output. The device can be widely applied to the fields of transportation, energy construction, energy conservation, environmental protection and the like, is simple in mechanical structure and manufacturing process, and has wide industrial and commercial application values.

The present invention proposes a safety switch element (1) having a tactile sensor in the form of a switch strip (2) or a switch mat, and having an electrical contact element (7), wherein at least one contact element (7) is connected as an electrode (E) of a capacitive proximity sensor in such a way that capacitive coupling (C(d)) to an surrounding object, in particular capacitive coupling that depends on the distance between such object and the capacitive proximity sensor is measured, and the present invention proposes that the electrical contact elements (7) of the tactile sensor are normally connected as a closed circuit and connected in a way that they conduct electricity to one another, and that a single contact element or a series of contact elements (7) connected in a way that conduct electricity to one another form the electrode (E) of the proximity sensor.

A road-based energy harvesting system 40, 42 converts kinetic energy from passing traffic to electricity using a hydraulic motor, powered from a pressurised fluid in a closed circuit, which drives an