1052 results about "Closed circuit" patented technology

A system for warning drivers of the movements semi-tractor and trailer vehicles of the semi-tractor's intended course, and warning drivers of other vehicles around the semi-tractor of the course and intended movement of the semi-tractor. An example includes a closed circuit video display system including cameras mounted at the front corners of the semi-tractor, cameras mounted at the rear of the trailer, and cameras mounted from a central area of the semi-tractor trailer. The system also uses a written message display system having display modules that display messages to vehicles near the semi-tractor. The displays can be used to present various pre-programmed messages or messages created by the driver of the semi-tractor through a message input interface, allowing the driver of the semi-tractor to provide customized massages to other nearby drivers.

The invention discloses an offshore photovoltaic platform electric control system and a floating type offshore photovoltaic platform. The offshore photovoltaic platform electric control system comprises a controller, energy consumption equipment, a voltage sensor, a current sensor and a data monitoring system. The controller is electrically connected with a photovoltaic module of the offshore photovoltaic platform, the energy consumption equipment is electrically connected with the controller to form a closed circuit, the voltage sensor is connected with the energy consumption equipment in parallel, the current sensor is connected with the energy consumption equipment in series, and the data monitoring system is electrically connected with each of the voltage sensor and the current sensor. The offshore photovoltaic platform electric control system provided by the invention has the advantage of high efficiency and reliability in data monitoring of the photovoltaic module on the floating type offshore photovoltaic platform.

A work machine includes: a hydraulic actuator; a closed-circuit pump that is connected to the hydraulic actuator in a closed circuit, and supplies and discharges a hydraulic working fluid to and from the hydraulic actuator; an open-circuit pump that is connected to the hydraulic actuator in an open circuit, and supplies the hydraulic working fluid to the hydraulic actuator; a charge pump; a charge flow path that introduces the hydraulic working fluid delivered from the charge pump to the closed circuit; an excess fluid discharging device that discharges an excess hydraulic working fluid of the closed circuit to the charge flow path; and a controller that controls a delivery capacity of the closed-circuit pump and a delivery capacity of the open-circuit pump. The controller increases the delivery capacity of the open-circuit pump, or reduces the delivery capacity of the closed-circuit pump when a state of a pressure of the charge flow path has transited to be lower than a predetermined pressure threshold from equal to or higher than the predetermined pressure threshold, or when a state of the work device has transited to a state of performing the excavation work from a state of not-performing the excavation work.

Connection adapter for docking and undocking a maintenance station to a service valve of a third-party system in which a working fluid circulates in a closed circuit with a connection via which for filling working fluid under pressure can be fed from the maintenance station into the connection adapter or via which working fluid under pressure can be discharged, with a dead space which is ventilated via a venting path, the connection adapter includes a servo space in which a servo piston for opening and closing the venting path is accommodated, and a valve spindle that operates a valve element, and a hold-down device for opening a spring valve insert forming the service valve, which is designed and arranged in such a way that it only opens the spring valve insert after the servo piston has reached a position closing the ventilation path.

The invention discloses auxiliary safety equipment for a ground rod, which is applied to the field of power equipment and comprises a base, and a detection mechanism is arranged on the surface of the base; according to the invention, the wire of the grounding rod is connected with the hook, and after the hook is hooked on the metal cable, an internal circuit is triggered through the connecting terminal to form a loop, so that a closed circuit is realized; when the circuit is closed, the buzzer gives an alarm, and the main control chip sends a closed-loop signal to the alarm box through the communication module to realize state voice alarm information to inform that the grounding rod is normally hung on the metal cable, so that the purpose of high safety is achieved, and the grounding rod is convenient to use. By moving the clamping rod, the clamping rod is separated from the adjusting hole, after the handle rod is moved to the needed position, the clamping rod is loosened, the clamping rod is clamped with the adjusting hole under the action of the third spring, the length of the handle rod can be adjusted, and practicability and applicability are improved.

The invention discloses a beneficiation method of refractory iron ore with symbiotic hematite, limonite and siderite, which comprises the following steps of: crushing weakly magnetic refractory iron ore to below 100mm in a closed circuit, then sequentially carrying out three times of dry screening to obtain four particle fractions of 0-6mm, 6-15mm, 15-40mm and 40-100mm, pre-selecting the particle fractions of 6-15mm by adopting a dry high-intensity magnetic separator, pre-selecting the particle fractions of 15-40mm by adopting a chunk jigger, pre-selecting the particle fractions of 40-100mm by adopting a photoelectric intelligent separator, and pre-selecting the particle fractions of 40-100mm by adopting a high-intensity magnetic separator; photoelectric intelligent pre-selected concentrate is crushed to 0-40 mm through a fine crushing closed circuit, then jigging pre-selected concentrate is combined, then the photoelectric intelligent pre-selected concentrate is crushed to 0-6 mm through an ultra-fine crushing closed circuit, an ultra-fine crushing product is combined with the 0-6 mm fraction, then wet type strong magnetic pre-selection is conducted through a coarse grain wet type strong magnetic separator, the pre-selected concentrate is subjected to ore grinding-fine grain wet type strong magnetic one-coarse one-scavenging one-coarse one-scavenging one-fine one-scavenging reverse flotation, and the final concentrate is obtained. And final concentrate is obtained. The invention has the advantages of large raw ore selection granularity, large tailing discarding amount, low energy consumption, good separation effect and the like.

A cooling element system (100), for use within a cooling device (590) of a closed-circuit respirator (691), includes a plurality of cooling elements and a collar (120). The cooling elements each have an element housing (112), having a liquid-tight closure (114), filled or fillable with a coolant. The element housings allow for a common mounting arrangement of the number of cooling elements within the cooling device. The collar encloses the cooling elements in the common mounting arrangement and has a carrying area (122), which is configured to carry the number of cooling elements in the common mounting arrangement at the carrying area. A removal of the number of cooling elements, in the common mounting arrangement, from the cooling device and an insertion into the cooling device, are possible by means of the carrying area.

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 invention relates to the field of air detection, in particular to a flux real-time monitoring system based on an ABB greenhouse gas closed-circuit analyzer. The invention discloses a flux real-time monitoring system based on an ABB greenhouse gas closed-circuit analyzer. The flux real-time monitoring system comprises a gas analysis subsystem, a meteorological observation subsystem and a data acquisition and processing analysis subsystem, the gas analysis subsystem is responsible for measuring the concentration change of greenhouse gas, the meteorological observation subsystem is responsible for providing atmospheric background information, a complete, continuous and real-time flux monitoring system can be formed, the system can efficiently operate in a field environment, the flux of the greenhouse gas can be monitored and accurately calculated in real time, and the real-time performance of the system is improved. And long-term ecological system research and climate change monitoring are supported.

A magnet arrangement (11) for a magnetic resonance instrument (10), 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 that has accumulated in the superconducting magnet (12) to the discharge system (35); wherein the discharge system (35) comprises a supercapacitor (30) which is configured to buffer a transfer of electrical energy from the superconducting magnet (12) to a discharge element in the discharge system (35).

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).

The invention discloses a grading magnetic-flotation combined beneficiation method for sulfur-oxygen mixed copper ore. The grading magnetic-flotation combined beneficiation method comprises the steps of ore grinding and screening, magnetic separation, grading, copper sulfide flotation, copper oxide roughing and copper oxide enhanced scavenging. According to the method, strong magnetic separation is adopted in the mill grading system to recover part of coarse-grain copper oxide, excessive grinding of copper oxide minerals in the ore grinding process is reduced, early recovery can be achieved, the comprehensive recovery rate of copper oxide is increased, meanwhile, release of copper ions in the ore grinding process is reduced, and the adverse effect on follow-up copper sulfide flotation is relieved. The efficient copper oxide vulcanizing agent is composed of sodium sulfide and sodium pyrosulfite, the stability of a film in the vulcanizing process is enhanced, meanwhile, the inhibition effect on pyrite is enhanced, and the flotation separation efficiency of copper oxide is improved. In addition, by adopting an efficient reagent and precise regulation and control, copper oxide concentrate is directly obtained through open circuit of copper oxide roughing and enhanced scavenging concentrate, and the copper metal falling loss caused by closed cycle is reduced.

Spiral finned elliptical tube closed circuit coolers and evaporative refrigerant condensers in which the air flow entering the unit is directed to flow across the tubes in a direction that is parallel to the tube axes and generally perpendicular to the fins produce a completely unexpected gain in capacity of 25% compared to comparable units in which the air flow is directed across / perpendicular to the tube axes.

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 an underwater cable connection plug with high sealing performance, which belongs to the field of electrical technology and comprises a female plug, the inner wall of which is slidably connected with a male plug for conductive transmission, the surfaces of the female plug and the male plug are both sleeved with an insulating tube for protecting the normal operation of the male plug, and a sleeve is fixedly connected with the surface of the insulating tube on the right side, and a reaction chamber, a conductive sheet, a quicklime sheet, a contact sheet, a wire, and an alarm are arranged, and the heat generated by the mutual reaction of water and quicklime sheets causes the conductive sheet to move to a side close to airbag 1, thereby causing the conductive sheet and the contact sheet to contact each other to form a closed circuit, so that the alarm sounds an alarm to remind construction workers to eliminate safety hazards in time. This method is simple to operate, synchronized with time, provides timely reminders, is eye-catching, and has high safety.

Connection adapter for docking and undocking a maintenance station to a service valve of a third-party system in which a working fluid circulates in a closed circuit, in particular an air conditioning system, with a connection via which pressurised working fluid from the maintenance station can be fed into the connection adapter for filling or via which pressurised working fluid can be discharged, with a dead space which is ventilated via a venting path even when the service valve is coupled to the connection adapter, with a servo chamber which is fluidically connectable to the connection, in which a servo piston is accommodated for opening and closing the venting path, which is urged by an overpressure in the servo chamber towards its position closing the venting path, and with a valve spindle which actuates a first valve element and a second valve element, wherein the first valve element is designed and positioned such thatthat when the valve spindle is moved to push open the service valve, it fluidically connects the servo chamber with the connection and the second valve element is designed and positioned such that it only opens and fluidically connects the dead space with the servo chamber after the servo piston has reached a position closing the venting path and with a hold-down device for opening the spring valve insert forming a component of the service valve, which is designed and arranged such that it only opens the spring valve insert after the servo piston has reached a position closing the venting path.

The invention discloses a closed-loop type mixed gas flux measurement system, and relates to the technical field of flux measurement, a gas path structure of a gas analyzer in the measurement system is designed by combining serial gas pools with a sucking pump, and a group of TDLAS sensors are arranged at a phosgene gas path of each gas pool respectively; the specifications of the phosgene paths of the gas pools and the TDLAS sensors are matched and designed according to the characteristics of various to-be-detected gases, and in the gas extraction process of the gas extraction pump, the measurement host performs concentration calculation by using data of the TDLAS sensors and then completes transmission time delay compensation with the three-dimensional ultrasonic wind, so that the concentration measurement results of the various to-be-detected gases can be obtained through calculation. Cross interference of different gases is avoided, and synchronous measurement of various to-be-measured gases can be basically realized in an error range, so that the accuracy, reliability and efficiency of flux measurement are improved, and all-day and all-weather measurement of flux can be realized.

The invention discloses a novel mineral processing technology for Anshan type iron ore. The method comprises the specific steps that raw ore is subjected to a three-section two-closed-circuit crushing and screening process, and then qualified materials are obtained; after powder is subjected to wet-type pre-concentration, concentrate enters a grinding machine to be subjected to ore grinding operation, materials discharged by the grinding machine are subjected to weak magnetic roughing, and tailings can be thrown early. And the concentrate is graded through a hydrocyclone set and a high-frequency screen to form closed-loop grinding, qualified materials enter two sections of weak magnetic concentration and electromagnetic elutriation, final concentrate is obtained through filtering, magnetic tailings of all the sections are combined for tailings recovery, and the final tailings are subjected to dry discharging operation to obtain tailings and tail mud products. The combined beneficiation process of crushing, screening, large block dry separation, secondary screening, high-pressure roller grinding, wet-type pre-separation, grading, ore grinding, low-intensity magnetic separation, concentration, filtering and the like is adopted, qualified iron ore concentrate can be obtained, and magnetic tails of all sections can be used as building raw materials such as cement or gravel aggregate. The process is simplified, the milling grade is improved, the system production capacity is improved, the beneficiation cost is reduced, and the economic benefit of a beneficiation plant is increased.

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 utility model discloses a rail push-pull type covering electric heating hotbed which comprises an electric heating hotbed body and a push-pull type covering device. The electric heating hotbed main body comprises an extruded sheet, river sand is paved below the extruded sheet, geothermal wires are uniformly distributed above the extruded sheet, and two ends of the geothermal wires are connected with an automatic temperature controller through power inlets to form a closed circuit; river sand and non-woven fabric are uniformly covered on the terrestrial heat lines, and hole trays for seedling raising are placed on the terrestrial heat lines The push-pull type covering device comprises a groove type seedbed frame, an outer side rail bottom plate, a pulley assembly and an arch bar, and the pulley assembly comprises a rail and a pulley; the arch bars comprise the inner side covering arch bars and the outer side covering arch bars, the center vertical height of the inner side covering arch bars is smaller than that of the outer side covering arch bars, the inner side covering arch bars move on the rails at the top ends of the groove type seedbed frames through the pulleys, and the outer side covering arch bars move on the rails of the outer side rail bottom plates through the pulleys. The device is suitable for plant varieties of various out-of-season heating seedbed seedling raising, the seedling condition is good, the seedling raising efficiency is high, and operation is convenient.

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.

The invention discloses a vehicle hub threaded hole size automatic detection device, and relates to the technical field of detection equipment, the vehicle hub threaded hole size automatic detection device comprises a base and a hub member, the top of the base is rotatably connected with a rotating disc, the axis of one side of the rotating disc is provided with a detection assembly, and the outer side of the detection assembly is provided with a clamping block for clamping and fixing the hub member. According to the automatic detection equipment for the size of the threaded hole of the vehicle hub, by introducing an alarm lamp and a circuit closing mechanism, when the size of the threaded hole of the hub does not meet a preset standard, a movable rod moves to an inclined area, so that a connecting copper sheet is in contact with a fixed copper sheet, a closed circuit is formed, and the alarm lamp is activated; the real-time alarm function can find and process unqualified hub parts in time, and the problem in the subsequent assembly or use process caused by the unqualified size of the threaded hole is avoided.

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.

The invention belongs to the technical field of aero-engine cooling, and particularly relates to an aero-engine lubricating oil and fuel oil collaborative cooling system which is characterized in that lubricating oil in an engine lubricating oil tank circularly flows through a lubricating oil system pipeline; the lubricating oil circulation path is sequentially connected in series with a lubricating oil pump, a fuel and lubricating oil radiator, an internal flow channel of an engine air inlet structure, an internal flow channel of a fan stator blade, a bearing cavity, a casing and a transmission accessory to form a closed loop; the fuel oil system comprises a fuel oil tank, a fuel oil pump and a fuel oil and lubricating oil radiator. Fuel oil is conveyed to the fuel oil and lubricating oil radiator through a fuel oil pipeline to be injected into an engine combustion chamber after exchanging heat with lubricating oil. The system is provided with a temperature closed-loop control module, the temperature of lubricating oil is monitored in real time through a temperature sensor arranged in a lubricating oil tank, a temperature signal is transmitted to an engine control unit through an engine cable, and a lubricating oil pump is driven to execute variable-frequency speed regulation to achieve dynamic regulation of the flow of the lubricating oil.

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.

To provide a thermal management system capable of adjusting pressure of a heating medium in each of a first closed circuit and a second closed circuit while suppressing a change of a flow rate of the heating medium in each of the first closed circuit and the second closed circuit by using a pressure adjustment mechanism.SOLUTION: A thermal management system includes: a five-way valve 180 (switching device) that switches a flowing path of a heating medium in a plurality of paths (130a, 130b, 170a, 170b) (external flow passages); and a reservoir tank 175 (pressure adjustment mechanism). The five-way valve 180 enables switching so as to form a path 181 (first path) for forming a closed circuit 190 (first closed circuit) in which the reservoir tank is provided, a path 182 (second path) for forming a closed circuit 191 (second closed circuit) in which the reservoir tank is not provided and a communication passage 184 for communicating the closed circuit 190 and the closed circuit 191. A flow passage area of the communication passage 184 is smaller than that of each of the path 181 and the path 182.SELECTED DRAWING: Figure 7

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.