610 results about "Closed circuit" patented technology

The present disclosure relates to a reconfigurable battery system and method of operating the same. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a state of charge of a battery, determine a closed circuit voltage of the battery, determine a value of a parameter based on a ratio of the state of charge and the closed circuit voltage, and control a switch coupled to the battery based on the value of the parameter, the controlling of the switch to either cause the battery to be coupled to a battery string or cause the battery to be disconnected from the battery string.

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 system for supplying heat to a building comprises, in addition to an outside air heat exchanger (11), a fan device (12) for conveying outside air through the outside air heat exchanger (11), a latent heat storage unit (13) with a closed tank (18) and a heat pump (15), a piping system (16) filled with a liquid working medium and a pumping device (17) for conveying the working medium through the piping system. The piping system (16), the pumping device (17), the outdoor air heat exchanger (11), the heat pump (15) and the latent heat storage unit (13) form a closed circuit for the working medium and are arranged such that the working medium flows through the outdoor air heat exchanger (11), the latent heat storage unit (19) and an evaporator heat exchanger (21) of the heat pump (15) in the closed circuit in this sequence before being returned to the outdoor air heat exchanger (11).

A modular utility system integrates clean power generation, thermal management, and security monitoring within a standardized shipping container format. The system comprises a generator set (70 kW-600 kW) configured for operation with multiple fuel sources including natural gas, propane, methane, or hydrogen, coupled to a water-fired absorption chiller utilizing waste heat recovery. A closed-circuit evaporative cooler enhances thermal efficiency without chemical additives. The system incorporates a 360-degree security camera and remote monitoring capabilities for tracking operational parameters. A power distribution panel (460V, 3-phase) supports both building power supply and electric vehicle charging stations. The modular architecture enables scalable deployment through dual-module configurations, with separate power generation and thermal management units. The system provides sustainable, off-grid power generation while maximizing energy efficiency through integrated waste heat utilization and advanced thermal management protocols.

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.

The invention discloses a wetland carbon sink monitoring system and a carbon sink evaluation method, and the wetland carbon sink monitoring system is designed based on open circuit / closed circuit vorticity. Detection equipment of the wetland carbon sink monitoring system comprises a carbon dioxide analyzer, a three-dimensional ultrasonic anemorumbometer, a methane analyzer, sunlight-induced chlorophyll fluorescence observation equipment and micrometeorological monitoring equipment, and a carbon sink model is constructed based on the wetland carbon sink monitoring system. Main greenhouse gases are monitored in real time, high-frequency continuous atmosphere-vegetation interface and atmosphere-water body interface carbon income and expenditure data are obtained, wetland and water body ecological system carbon sink time change characteristics are revealed, a carbon sink model is constructed in combination with micrometeorological monitoring and environmental data, the Hongze lake wetland carbon sink pattern and influence factors are clarified, and the wetland carbon sink time change characteristics are analyzed. And estimating the wetland carbon sink potential of the Hongze lake.

The invention relates to the technical field of oil-containing waste treatment and resource utilization, in particular to a water-based oil sludge stripping-split-phase recycling integrated treatment method. According to the method, polyepoxysuccinic acid grafted quaternary ammonium salt chitosan is adopted as a stripping agent, and oil stains are stripped from a solid phase through ultrasonic treatment to form emulsion; the core of the method is that a temperature-sensitive response type flocculating agent, namely polyisopropylacrylamide grafted chitosan, is added during gradient heating, and the auxiliary agent is converted from hydrophilic to hydrophobic after being heated, so that efficient demulsification is realized, and oil-water-solid three-phase separation is promoted. Through the synergistic effect of the two assistants, the technical problem that the emulsion is stable and difficult to separate after stripping is solved, closed cycle of the treated water phase is realized, and high efficiency, environmental protection and economic benefits are achieved.

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.

According to the gluing equipment and the air pressure control method thereof, structural innovation is achieved through cooperative feedback of a control module, after the pressure of an airtight cavity is stable, direct communication between the airtight cavity and a working cavity is cut off through a switching valve set to form an independent closed circuit system, and the design thoroughly isolates interference of a compressed air source to the gluing process; according to the method, the technical scheme that when the pressure of the working cavity is reduced to the compensation threshold value, the air compression device is synchronously activated for compensation and the airtight cavity body passage is synchronously activated for reconstruction is innovatively adopted, rapid pressure recovery is achieved, and innovative control logic is constructed through a multi-stage judgment mechanism for presetting the pressure threshold value, the compensation threshold value and the recovery threshold value; and cooperative control of dynamic pressure relief of the airtight cavity and on-demand compensation of the working cavity is combined, so that the anti-interference capability of the system is remarkably improved.

The invention provides a body catalytic reactor based on Joule heating, a reverse water gas shift reaction method and application. The body catalytic reactor comprises a reaction kettle for placing a solid catalyst for endothermic gas-solid multiphase reaction and a closed circuit for heating the solid catalyst based on Joule. According to the technical scheme, the solid catalyst (active substance) with reaction catalytic activity is directly used as a heat supply source of the reaction, and the solid catalyst generates Joule heat by adopting an electric heating mode, so that the solid catalyst can be used as the catalyst and the heat supply source at the same time; a real heat transfer process from inside to outside of the solid catalyst is realized, energy is concentrated on the solid catalyst, and the energy utilization efficiency is extremely high.

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 utility model belongs to the technical field of emergency rescue, and particularly relates to an air respirator mask and a system. The air respirator mask comprises a mask body and a transparent face mirror, a mouth and nose mask is arranged in an inner cavity of the mask body, an air circulation area is formed between the outer portion of the mouth and nose mask and the inner side of the face mirror, two air suction valve plates are symmetrically arranged on the mouth and nose mask, and a double-mouth breathing seat is arranged on the face mirror. The double-port breathing seat is provided with an inspiration valve connector and an exhalation valve connector, the inspiration valve connector is used for being connected with an air respirator air bottle and an air supply valve of the air respirator air bottle, and the inspiration valve connector is used for being connected with an exhalation valve seat which can be freely inserted and detached. By designing the double-port breathing seat and the exhalation valve seat capable of being freely inserted and detached, when gas in air exhalation is completely consumed, on the premise that an air respirator mask and an air supply valve of the air respirator mask are not detached, the exhalation valve seat is pulled out, and a chemical oxygen respirator is inserted into an exhalation valve interface, so that closed-loop type oxygen support can be provided for a wearer; and the respiratory protection time of rescuers is prolonged.

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 the technical field of diving respirators, and discloses a single closed-loop circulation respirator which comprises a breathing mouthpiece, a carbon fiber machine body, a first air supply module, an external computer watch, a second air supply module and an integrated machine head, and the lower end of the integrated machine head is in threaded connection with a carbon dioxide adsorbent tank; through cooperation of the carbon fiber machine body, the first air supply module, the second air supply module, the integrated breathing air bag and the carbon dioxide adsorbent tank, simple structural design is adopted, the carbon fiber machine body is additionally arranged, the machine weight is greatly reduced, carrying is convenient, control is facilitated, the integrated breathing air bag has high strength and hydrolysis resistance, meanwhile, flexibility is not lost, and the service life of the machine is prolonged. And meanwhile, by pressing the adding valve on the first air supply module, pressing the gulp valve on the integrated machine head or the adding valve on the second air supply module, multiple air supply modes are combined with the actual situation to be practically applied, and one more layer of guarantee is provided for technical diving.

The invention discloses a displacement control method of a walking closed system and engineering mechanical equipment, the walking closed system comprises an engine, a closed pump, a front motor and a rear motor, the displacement control method comprises the following steps: S1, detecting a brake signal, and if the brake signal is detected, turning to S2; s2, the displacement of the closed pump is decreased at the initial change rate, and the displacement of the front motor and the displacement of the rear motor are increased at the initial change rate; s3, the vehicle state of the vehicle at the current moment is detected, and the vehicle state of the next moment is calculated and estimated; s4, inputting the pre-estimation result into a decoupling network for decoupling, adjusting the displacement change rate according to the relationship between the pre-estimated and calculated vehicle state at the next moment and a preset limit range, and outputting the adjusted displacement change rate; and S5, replacing the displacement change rate at the previous moment with the adjusted displacement change rate, and turning to the step S2. According to the method, the problems of brake side oil way pressure impact, driving side air suction and engine overspeed in the brake process of the hydraulic walking closed system are solved.

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.

An example heat pump system includes a first circuit including a first refrigerant configured to cycle a non-mechanical liquid to high critical vapor fluid phase in a closed circuit from an evaporator to an outlet of a liquid pump and a second circuit comprising a second refrigerant. The second circuit is configured to extract thermal energy from the first circuit to produce a heated fluid and a cooled fluid. The first circuit and the second circuit are configured in a mechanical relationship for transferring energy from the first circuit to the second circuit via a phase change of the first refrigerant through a dual chambered heat pump, the first circuit including a non-mechanical phase liquid to high critical vapor fluid phase.

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.

An example heat pump system includes a first circuit including a first refrigerant configured to cycle a non-mechanical liquid to high critical vapor fluid phase in a closed circuit from an evaporator to an outlet of a liquid pump and a second circuit comprising a second refrigerant. The second circuit is configured to extract thermal energy from the first circuit to produce a heated fluid and a cooled fluid. The first circuit and the second circuit are configured in a mechanical relationship for transferring energy from the first circuit to the second circuit via a phase change of the first refrigerant through a dual chambered heat pump, the first circuit including a non-mechanical phase liquid to high critical vapor fluid phase.

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 invention belongs to the technical field of industrial cleaning and resource circulation, particularly relates to a flexible graphite polar plate dipping cleaning closed-loop water circulation system and a use method thereof, and particularly aims at cleaning wastewater containing a surfactant (OP-10). Zero emission of the cleaning agent and water (the recovery rate of OP-10 is larger than or equal to 90%, the water circulation rate is larger than or equal to 98%, and the generation amount of hazardous waste is reduced by 100%) and efficient removal of resin, graphite powder and an initiator (the removal rate of the resin / graphite powder is larger than or equal to 99%, and the degradation rate of the initiator is larger than or equal to 99.9%) are achieved, so that closed-loop recycling of ultrapure water and an active agent is achieved, it is ensured that the cleaning effect each time is consistent with that of the first time, the usage amount of OP-10 is saved every year, the cost is reduced by 80%, and the production cost is reduced. And the water consumption is reduced by 90%.

Hydrostatic transmission for a drive system, comprising a drive shaft (4) of a primary unit (1) that can be coupled to an internal combustion engine of the drive system and a secondary unit (2) that can be coupled to an output of the drive system, wherein the two units (1, 2) are fluidically connected to each other via two working lines (10) of a closed circuit, and wherein the primary unit (1) has an adjustable swivel angle (angle_pump) and an adjustable displacement volume (Vg_pump) that can be controlled by an electrical control unit (8) when the hydrostatic transmission is braked, characterized by a controller (38;138), from which a correction value (Vg_pump_add_incr) for the swivel angle (angle_pump) or the displacement volume (Vg_pump) can be output, wherein the correction value (Vg_pump_add_incr) can be added to a swivel angle (angle_pump_brake) or displacement volume (Vg_pump-brake) pre-controlled by the control unit (8), wherein an input variable of the controller (38; 138) is a speed difference (Δn_eng) between an actual speed (n_eng_act) of the internal combustion engine or a quantity derived therefrom (n_pump_act) and a maximum speed (n_eng_max) of the internal combustion engine or a quantity derived therefrom (n_pump_max).;

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.

A position indicator is provided. The electromagnetic induction type position indicator includes a first resonant circuit including a first capacitor and a first coil wound around a magnetic core disposed on one end side of the position indicator in an axial direction of the position indicator, a second coil independent of the first coil and positioned such that the second coil is magnetically coupled with the first coil when in use, and a switch electrically connected with the second coil, wherein a closed circuit including the second coil is formed when the switch is set to be on.

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.