887results about How to "Effective isolation" patented technology

The invention discloses a laser cutting device for steel structure production and machining, and relates to the technical field of steel structure production and machining.The laser cutting device for steel structure production and machining comprises a cutting table, a sliding groove is fixedly formed in the surface of the cutting table, and a cutting machine is slidably mounted on the inner wall of the sliding groove; the fixing device comprises a sliding plate, a hydraulic cylinder, a first clamping plate, a second clamping plate, a rotating shaft, a first tooth block, a second tooth block, a third tooth block, a first inclined block, a fixing plate, a sliding plate, a second inclined block, a first telescopic elastic rod, a sliding plate, a second inclined block, a second telescopic elastic rod, a linkage block, a limiting block and a rotating plate. And then the sliding plate moves to clamp the materials, so that the situation that the cutting precision is poor due to material shaking is further avoided during cutting work, automatic adjustment is conducted according to the shape of the steel structure, and the stability of the workpiece in the cutting process is guaranteed.

The invention relates to the technical field of microorganism sampling equipment, in particular to an ore-containing salt lake brine microorganism sampling device and method.The ore-containing salt lake brine microorganism sampling device comprises a balance weight floating platform, and through cooperation of a laser ranging mechanism, a PLC, a first electromagnetic valve, a second electromagnetic valve and an air pump, the sampling depth can be adjusted according to the actual sampling depth requirement; sampling distance parameters are flexibly set through the PLC according to actual sampling requirements, the winding mechanism is controlled to work through the PLC, the winding mechanism drives the sampling head to be lowered or pulled back, the distance between the sampling head and the bottom plate is detected through the laser ranging mechanism, and when the actual distance detected by the laser ranging mechanism reaches a set value, the sampling head is driven to move back and forth. The first electromagnetic valve and the second electromagnetic valve on the to-be-sampled barrel are started through the PLC, the air pump is started, a sample enters from the sampling head through an air pumping mode of the air pump, the operation is simple, the use is convenient and fast, and meanwhile, the sampling flexibility of samples with different depths is improved.

The invention discloses an intelligent beef cattle breeding and feed management monitoring system in the technical field of cattle breeding. Comprising an NFC label used for distinguishing cattle, a camera used for shooting the overall state of the cattle, a weighing instrument used for being placed on one side of a trough to weigh the cattle, a temperature and humidity sensor and an accurate feeding module. Calculating and preparing a feed formula and total amount; and the intelligent monitoring module is used for receiving the feed intake and the cattle state video data of the cattle identified and monitored by the camera, and automatically judging the overall state of the cattle according to the feed intake and the cattle state video data. The system is scientific and reasonable, the system makes a scientific and reasonable mating plan, and ensures that cattle can obtain appropriate nutrition supply through data sharing and cooperative work, and effective linkage of breeding and feed management is achieved.

The invention discloses a ventilation-sound insulation integrated ultrathin metasurface grating and a using method thereof. The grating is composed of a perforated cover plate, a bottom plate, a plurality of slender cavities with different lengths formed by separating the perforated cover plate and the bottom plate through wall plates, and a peripheral grid-shaped ventilation area. According to the grille, the excellent broadband sound insulation performance can be achieved on the premise that the high ventilation quantity is guaranteed through a thin layer structure with the thickness as low as about 20 mm. The folded labyrinth resonance sound absorption units with gradient lengths are arranged in the non-ventilation area, broadband continuous sound absorption peaks can be generated, and sound absorption replaces sound insulation, so that broadband sound attenuation performance is obtained. Compared with an existing ventilation and sound insulation grille, the grille structure is thinner, larger in ventilation area and wider in working frequency band, the wide engineering application value of the grille structure is shown, a light-weight and low-frequency broadband noise reduction solution is provided for mechanical equipment such as airplanes, warships, high-speed rails and automobiles, and the mechanical equipment can be widely applied to mechanical equipment such as the airplanes, the warships, the high-speed rails and the automobiles. And the method also has wide application prospects in ventilation and sound insulation systems in green buildings.

The invention relates to the technical field of projectors, in particular to a projector control method and a projector. The method comprises the following steps: performing image projection signal processing on target projection image data to generate initial projection picture data; performing projection point cloud space-time registration on the initial projection picture data by using the dual laser radar assembly to obtain projection scanning point cloud space data; performing shielding area geometric feature analysis on the projection scanning point cloud spatial data, determining an ideal projection area, and generating ideal rectangular projection area data; performing intelligent projection control parameter processing on the ideal rectangular projection area data to obtain intelligent projection control parameters; and performing projection attitude control instruction processing on the intelligent projection control parameters to obtain projection control optimization effect data. According to the invention, the projection control parameters are automatically adjusted through intelligent identification of the projection surface, so that the projector can maintain a stable projection effect in different environments, and the quality of a projection image is remarkably improved.

The invention relates to the technical field of high-performance fibers, in particular to a high-performance fiber containing carbon nanotubes and a preparation method of the high-performance fiber. The preparation method comprises the following steps: adding ammonium polyphosphate, alkylphenol polyoxyethylene ether and tetraethyl orthosilicate to obtain a silicon-coated ammonium polyphosphate material; then adding a silicon-coated ammonium polyphosphate material and gamma-aminopropyltriethoxysilane, so as to obtain a modified silicon-coated ammonium polyphosphate material; and mixing the modified silicon-coated ammonium polyphosphate material, tannic acid and a buffer solution to obtain the double-layer coated ammonium polyphosphate material. The fiber is obtained by adding a carbon nanotube material, a double-layer coated ammonium polyphosphate material, polytrimethylene terephthalate, a compatilizer and polypropylene and carrying out melt spinning. And then the fibers are sequentially soaked in an ethylenediamine solution, a polyglutamic acid solution and a chitosan solution, and the high-performance fibers are obtained. The obtained high-performance fiber has good flame retardance and antibacterial property, so that the high-performance fiber has a wide application prospect in the technical field of high-performance fibers.

The invention discloses an indoor visual positioning method and positioning system based on an occlusion clearing algorithm, and belongs to the technical field of occlusion image processing, image restoration and indoor positioning. The method is characterized by comprising the following steps: step 1, querying an image in a database, extracting feature information of the image in the database, and storing the feature information; step 2, shielding object detection is carried out, and shielding objects in all query images are removed; 3, performing image restoration by adopting the image restoration model, and restoring a query image; and step 4, indoor positioning is carried out. According to the indoor vision positioning method and positioning system based on the occlusion clearing algorithm, target detection, image restoration and feature matching technologies are combined, and the positioning accuracy and robustness are improved. According to the method and the device, the blocking objects in all the query images are detected and removed, so that the pixels of the blocking objects do not interfere with subsequent processing, and meanwhile, a clear target area is provided for an image recovery process.

The invention discloses a manufacturing method of an electromagnetic valve material with high corrosion resistance and easy cutting, which relates to the technical field of stainless steel and mainly comprises the following steps: melting in a heating furnace, AOD (argon oxygen decarburization) refining, LF (ladle furnace) refining, pouring, heat treatment, pretreatment, primary electroplating, secondary electroplating and finished product obtaining. And meanwhile, tin-bismuth alloy with specific content is introduced as a modifier for modification treatment, a slag former is added for refining and slagging-off, and the electromagnetic valve material which is good in corrosion resistance, high in strength and free of cutting is successfully prepared.

The utility model relates to the technical field of tunnel construction and underground space engineering construction, in particular to a TBM (Tunnel Boring Machine) hob performance test detection device based on linear rock breaking, which comprises a base, a frame is arranged on the base, and a rock breaking mechanism, a rock box mechanism, a rock breaking hob component and a rock box body are arranged in the frame. A load sensor is fixed between the tool support and the hydraulic oil cylinder, and a three-way force sensor is fixed between the tool support and the tool apron; a confining pressure sensor is arranged on the rock box body, a weighing device is arranged at the bottom end in the frame, and a photoelectric temperature integrated sensor is arranged on the weighing device. By monitoring various performance parameters such as hob load, temperature and abrasion in real time, analyzing hob diameter and weight changes, analyzing rock breaking effects of different hobs and researching a hob rock breaking mechanism, quantitative evaluation of performance differences of different hobs is achieved, reference is provided for manufacturers to manufacture and optimize hob performance, and the hob rock breaking performance evaluation device is suitable for large-scale popularization and application. And key guidance is provided for selection of tunnel project hobs and selection of construction parameters.

The invention provides a safe and reliable data center machine room cooling channel, and belongs to the technical field of data center heat dissipation and cooling devices. Comprising a bottom plate component, a vertical frame component, data center cabinets, a fire-fighting linkage skylight system, an access door system, an access control system and a monitoring sensing system, the data center cabinets are arranged between the bottom plate component and the vertical frame component in pairs, and the fire-fighting linkage skylight system is located at the top ends of the data center cabinets and the vertical frame component and can be in linkage with the monitoring sensing system. The channel door systems are located on the two sides of the cold channel respectively and can be in linkage with the access control system and the monitoring sensing system, and the purposes of safe opening and closing and emergency opening and closing are achieved. Meanwhile, an intelligent lighting system is further installed on the outer bottom face of the bottom short frame in the fire-fighting linkage skylight system, conventional lighting management can be achieved, highlight continuous lighting can be conducted in emergency, and reliable guarantee is provided for efficient operation, safety management and energy-saving control of a data center.

The utility model provides an oxygen-free galvanizing device for hot-rolled ribbed steel bars, which comprises a reduction sealing cover and a galvanizing sealing cover which are communicated through a transfer channel, a reduction mechanism arranged in the reduction sealing cover, and a galvanizing mechanism arranged in the galvanizing sealing cover, the reduction mechanism comprises a reduction cylinder which is horizontally arranged and internally provided with a rectangular channel in a transversely penetrating mode. The two ends of the reduction cylinder are connected with a head end nitrogen pipe and a tail end nitrogen pipe correspondingly. A plurality of mixed reducing gas inlets are formed in the middle of the reducing cylinder in parallel in the length direction; and the nitrogen pressure of the head-end nitrogen pipe and the tail-end nitrogen pipe is greater than the pressure of the mixed reducing gas. According to the device, the surface layer of the high-temperature ribbed steel bar is reduced through mixed reducing gas, then the high-temperature ribbed steel bar is conveyed to the galvanization mechanism for galvanization in the inert gas atmosphere, the reduction, conveying and galvanization processes are all carried out in an oxygen-free environment, oxidation of the surface of the steel bar is effectively avoided, and the influence of a steel bar oxidation layer on galvanization quality is avoided.

The invention provides an intersecting shield interval protection construction method, which belongs to the technical field of building construction, and comprises the following steps: firstly, excavating an open cut foundation pit at an intersection, arranging a cast-in-situ bored pile and a crown beam as an enclosure structure in the foundation pit, and arranging a steel support system at the same time. And after the enclosure structure is completed, the foundation pit is excavated to the designed depth, and reinforced concrete supporting piles and pile top beams are constructed. And on the basis, a reinforced concrete protection plate is poured to form a sheet pile structure type protection structure system. And finally, foundation pit filling is completed in a backfilling mode. Before the shield passes through the cross point, a test section is arranged to collect related construction data, and preparation is made for subsequent formal tunneling. And in the actual shield tunneling process, the tunneling speed and the soil bin pressure are controlled, and synchronous grouting is conducted. And after crossing the cross point, arranging closed rings in the front and back areas, and carrying out wall back grouting by adopting double-liquid slurry. And finally, a geological radar is used for detecting the cavity and repairing, and the problem of mutual influence in up-down close-distance crossed tunnel construction is solved.

The invention provides a motor and application, and the motor comprises a first housing which is provided with a main control circuit board; the second shell is positioned in the first shell and is provided with a driving circuit board and a motor body; wherein the driving circuit board is electrically connected with the main control circuit board and the motor body, the main control circuit board is used for outputting a control signal to the driving circuit board, and the driving circuit board is used for outputting a driving signal to the motor body based on the received control signal; wherein the driving circuit board is located at the end of the motor body, the driving circuit board is provided with two opposite surfaces, one surface is provided with a driving circuit, the other surface is provided with a sensing element, and the driving circuit is electrically connected with a main control circuit of the main control circuit board and the motor body. The sensing element is used for detecting the position of the motor body and outputting a detection signal to the driving circuit. The stability and reliability of the motor are improved.

The utility model is suitable for the technical field of power supply filters, and provides an adjustable inductance type power supply filter, which comprises a sound insulation shell and an adjusting assembly, the adjusting assembly comprises a plurality of partition plates arranged in the inner cavity of the sound insulation shell side by side, and the partition plates are in sliding fit with the sound insulation shell. Through holes for mutual connection of filters are formed in the plurality of spacing plates in a penetrating manner; the power interface and the load interface are arranged on the outer side of the sound insulation shell and are electrically connected with the corresponding filters respectively; according to the utility model, through the arrangement of the adjusting assembly and the arrangement of the slidable spacing board, the spacing between the cavities can be adjusted, and the position of the filter can be adjusted; a user can finely adjust the filter according to specific power supply signal characteristics and application requirements, and the performance of the filter is optimized; meanwhile, the sound insulation shell is made of an insulating material, so that external noise can be effectively isolated, and the purity of signals is ensured; and the output of the filter is more stable and reliable.

The invention relates to a vehicle-based prompt tone generation method, device and equipment and a storage medium. The method comprises the steps of obtaining preset sound source data, external white noise source data and internal white noise source data of a vehicle; the external white noise source data represents white noise which is collected outside the vehicle and emitted by an external loudspeaker within a preset frequency band range; the in-vehicle white noise source data represents white noise which is collected in the vehicle and emitted by a loudspeaker outside the vehicle within a preset frequency band range; determining a transmission loss frequency band according to the white noise source outside the vehicle and the white noise source inside the vehicle; the transmission loss frequency band represents the frequency band with loudness loss when the white noise is transmitted from the outside of the vehicle to the inside of the vehicle; and generating a prompt tone according to the preset sound source and the transmission loss frequency band. On the basis of the preset sound source, the warning tone is obtained in combination with the isolation condition of the white noise, and noise pollution of the warning tone to people in the vehicle is reduced.

The invention discloses an atomizer and an electronic atomization device.The atomizer comprises an oil cup, an oil storage tank, an atomizer body and a controller, the end, in the first direction, of the oil cup is provided with an opening, and an air outlet is formed in the side wall of the oil cup; the support is arranged in the opening, a mounting groove and an atomizing groove communicated with the mounting groove are formed in the side, facing the interior of the oil cup in the first direction, of the support, and a first sealing part and a second sealing part which are distributed in the first direction at intervals and make sealing contact with the inner side wall of the oil cup are arranged on the support. An air inlet groove and an air outlet groove which are located between the first sealing part and the second sealing part are formed in the support, the air inlet groove communicates with one end of the atomization groove, and the air outlet groove communicates with the other end of the atomization groove and leads to the air outlet; the atomizing core is arranged in the mounting groove, an atomizing channel is defined by the atomizing core and the atomizing groove, and a liquid storage cavity located in the side, opposite to the atomizing groove, of the atomizing core is defined by the atomizing core, the support and the oil cup. According to the atomizer, the related structure is simplified so that needed parts can be reduced, and in addition, the sealing effect can be improved.

The utility model discloses a silane cross-linked polyvinyl chloride flame-retardant cable, which comprises a cable core, three annularly distributed wire cores are arranged inside the cable core, a composite shielding layer is wrapped outside the cable core, and the composite shielding layer is composed of a conductive layer, an insulation isolation layer and a protection layer. The outer portion of the composite shielding layer is wrapped by a composite flame-retardant layer, the composite flame-retardant layer is composed of a base layer, a heat isolation layer and a reinforcing layer, the outer portion of the composite flame-retardant layer is wrapped by a composite protection layer, and the composite protection layer is composed of an inner protection layer, a waterproof layer, a sheath layer and an anti-ultraviolet layer. The problem that the insulation performance is reduced due to the fact that the insulation material is softened when the cable is in a high-temperature environment for a long time is solved.

The invention belongs to the technical field of metal part machining equipment, and particularly relates to a metal part welding device which comprises a straight seam welding machine body, a linear driving assembly and a connecting plate, and a fixing assembly is arranged at the left end of the straight seam welding machine body; the welding mechanism comprises a mounting seat mounted on the connecting plate, and a welding head is mounted on the mounting seat; the auxiliary mechanism comprises an air injection part rotationally arranged on the outer ring of the welding head, and a driving part and a cooling part are further fixedly installed on the welding head; and the preheating mechanism comprises a gas conveying part arranged on the side face of the straight seam welding machine body, plugging parts are arranged on the top face of the straight seam welding machine body in an array distribution mode, and a control part is arranged on the mounting base. By integrating inert gas protection, efficient cooling and intelligent preheating functions, the welding quality and production safety are remarkably improved, and meanwhile the high-precision and efficient automatic welding process is achieved.

The safe storage cabin comprises a main monitoring system, a heat dissipation fire fighting system and a cabin body, a plurality of energy storage electric cabinets are stored in the cabin body, and a main energy storage converter, a main transformer and an electric cabinet management system which are connected with the energy storage electric cabinets are fixedly arranged in the cabin body; the cabin body is provided with a cabin door, the cabin door is provided with a display panel and a cabin body management server, and the cabin body management server is electrically connected with a valve of the fire sprinkler, the main monitoring system, the main energy storage converter, the main transformer, the electric cabinet management system, a control mechanism of a roller shutter type fireproof blanket in the heat dissipation fire extinguishing system and the display panel; the main monitoring system transmits detected signals to the cabin management server, the cabin management server controls the operation states of the roller shutter type fireproof blanket, the fire sprinkler, the main energy storage converter, the main transformer and the electric cabinet management system according to the received signals, operation data are displayed through the display panel, large-scale management of the energy storage electric cabinet is achieved, and the energy storage electric cabinet management efficiency is improved. The energy storage cost is reduced, and the space utilization rate is improved.

The utility model relates to a vehicle-mounted integrated electromagnetic shielding case, and belongs to the technical field of communication and filtering. According to the utility model, the EMI power supply filtering unit is integrated, the electromagnetic interference between the case and the outside through a power line is effectively isolated, the design of the sub-cabin section structure and the labyrinth structure is adopted, the integrated electromagnetic shielding effect of the working cabin section of the case is ensured, the working cabin section is effectively isolated from the heat dissipation cabin section, and daily disassembly and maintenance of the case are facilitated; the integrated electromagnetic shielding effect of the case is considered, meanwhile, a low-thermal-resistance heat dissipation path is designed, and a reasonable heat dissipation airflow channel design is matched, so that heat generated by high-power-consumption components on the board card assembly is quickly dissipated into the environment through the case body, and normal operation of an electronic system in the case is guaranteed.

The invention discloses a purification method and a purification device for crystallized magnesium, and relates to the field of magnesium metal smelting. The method comprises the following steps: under the protection of an inert atmosphere, firstly carrying out pressure-applying melting treatment on a magnesium material to be smelted, and then carrying out pressure-applying filtering treatment on a product obtained after the melting treatment, so as to complete the flux-free smelting process of the magnesium material. And meanwhile, the metal magnesium liquid and most of the oxide shells are separated by utilizing the liquidity difference between the liquid metal magnesium and the solid oxide shells. Compared with a conventional smelting process without pressure application, the method has the advantages that the melting rate of the crystallized magnesium can be remarkably increased, most of oxide impurities are removed, a series of pollution problems caused by flux use are solved from the source, and low-cost, high-efficiency and high-quality smelting of the crystallized magnesium is realized.

The invention discloses a bottom breaking type unpacking machine which comprises a rack, a bag breaking chamber, a recycling chamber, a discharging bin, a collecting box, a bag breaking device, a flow assisting device, a recycling device and a hoisting device. The bag breaking chamber and the recycling chamber are both installed on the machine frame and are both closed cavities. The discharging bin communicates with the bottom of the bag breaking chamber, and the collecting box communicates with the bottom of the recycling chamber. The bag breaking device is arranged in the discharging bin and used for breaking the hoisting bags. The flow assisting device is arranged in the bag breaking chamber and is used for repeatedly flapping the hoisting bag to form vibration; the recycling device is arranged in the recycling chamber and used for compressing the waste bags and discharging the waste bags into the collecting box. The hoisting device is arranged on the rack and used for hoisting the hoisting bags into the bag breaking chamber or the recycling chamber. According to the automatic feeding device, feeding operation can be efficiently completed, manual labor is reduced, the labor cost is reduced, the operation mechanization degree is improved, meanwhile, flying dust is prevented from being generated in the operation process as much as possible, the operation environment is improved, and harm to the body health of workers is relieved.

The utility model relates to an MPCVD device for diamond growth, which comprises a shell, the shell is provided with an upper cover, a water cooling table is arranged in the shell, a molybdenum table is arranged at the upper end of the water cooling table, an annular microwave quartz cover is arranged between the water cooling table and the upper cover, and a reaction cavity is defined by the upper cover, the microwave quartz cover and the water cooling table. The upper cover is provided with a plurality of windows hermetically connected with the upper cover and an air inlet channel communicated with the reaction cavity, the water cooling table comprises a horizontal part and a vertical part extending out of the bottom of the shell, an air outlet channel communicated with the reaction cavity is arranged in the water cooling table, a liquid cooling channel is further arranged in the water cooling table, and the liquid cooling channel is provided with a water inlet channel and a water outlet channel. The reaction cavity is good in sealing effect, external air can be effectively isolated, and the vacuum working environment in the reaction cavity is maintained.

The invention provides a liquid flow test device and method for a double-component nozzle assembly, and solves the problem of flow characteristic measurement under the condition of simultaneous radial liquid feeding of inner and outer nozzles in the double-component nozzle assembly, the liquid flow test device comprises a test upper shell, a test lower shell, a cushion block and a blanking cap, the upper testing shell comprises a first liquid inlet pipe nozzle, a pressing block and an annular body; the lower testing shell comprises a middle sleeve, a liquid collecting ring plate, a second liquid inlet pipe nozzle and a base; the cushion block is of a concave structure and is provided with a blind hole and a radial communicating hole; the upper end of the blanking cap makes contact with the lower end of the cushion block to achieve the sealing effect, and the lower end blocks an inner cavity of the inner nozzle and is higher than the upper end face of the inner nozzle. The upper end of the double-component nozzle assembly is located in the annular body, and the lower end penetrates through the base. The pressing block is arranged at the upper end of the middle sleeve and fixedly connected with the base. The device is compact in structure, firm in fixation and convenient to assemble and disassemble, and can meet the test of nozzle assemblies with various radial apertures.

According to the fretting wear test device in the high-temperature gas environment, the double-layer test cavity capable of simulating the high-temperature gas environment is designed, high temperature, gas components and pressure conditions are adjusted through the heating unit and the gas control module, and it is ensured that the test is conducted under the condition close to the actual service condition; by loading different normal forces, high frequency and variable displacement amplitude, fretting wear behaviors in a high-temperature gas environment are simulated so as to research the wear characteristics between the sample and a wear pair, and meanwhile, high-temperature-resistant materials such as a double-layer shell structure and a high-purity alumina fiber material are adopted, so that the double-layer test cavity can bear the high-temperature environment, and the wear resistance of the sample is improved. And heat is effectively isolated to ensure operation safety. And finally, the temperature and the air pressure in the test cavity are monitored in real time through a heating piece and an external driving system, so that the temperature and the pressure in the test process are stabilized in a set range, and damage to equipment caused by overheating or overpressure is avoided.

The invention discloses a fault-tolerant control method for a duplex-winding steer-by-wire system based on a prediction model, and the method comprises the steps: designing an open-phase fault diagnosis method, carrying out the fault diagnosis of a duplex-winding motor, and obtaining a fault diagnosis result; judging the health state of the double-winding motor according to the fault diagnosis result, establishing a double-winding motor prediction model in the health state, and reconstructing the double-winding motor prediction model in the open-phase fault state; and superposing the control input voltage in the nominal state and the auxiliary control input to jointly act on the double-winding motor, thereby realizing stability control of the double-winding motor in a healthy state and an open-phase fault state. According to the control method, it can be guaranteed that the dual-winding steering motor has fault-tolerant capability when the dual-winding steering motor has a local failure fault, so that the steer-by-wire system can effectively isolate and actively reconstruct a fault point according to the stability condition, and the control accuracy, stability and high safety under the condition of the local failure of the steering motor are improved.

The invention discloses a rapid fault isolation method and device for a power network powered by a power electronic power supply, and the method comprises the steps: respectively obtaining the grid-connected point voltage values of a plurality of pieces of power electronic power supply equipment at the same preset time when the grid-connected point voltage is abnormal, and sorting the grid-connected point voltage values from small to large; based on the topological structure of the power network, determining the bus corresponding to the minimum voltage value of the grid-connected point as the first bus closest to the fault point of the power network in combination with the sorting result; and locking a power electronic power supply equipment trigger pulse corresponding to the first bus, determining an opposite-end bus connected with the first bus as a second bus according to the grid-connected point voltage value variation before and after locking, and isolating a fault line between the first bus and the second bus. By adopting a multi-point voltage amplitude sorting comparison criterion, the requirements on data synchronization and data precision are relatively low; rapid isolation of internal faults of a renewable energy local power grid or a regional energy autonomous power grid is realized, and a guarantee is provided for continuous power supply of a non-fault region.

The invention relates to a freezing method foundation pit anti-permeation isolation system which comprises a plurality of freezing pipes inserted into a soil body near a foundation pit and distributed in an arch shape, a saline water main pipe sequentially connected with the freezing pipes and freezing stations connected to the two ends of the saline water main pipe. A lead screw, a nut lifting plate matched with the lead screw and a partition plate for guiding the nut lifting plate are arranged in a pipe body of the freezing pipe, the nut lifting plate divides the pipe body of the freezing pipe into an upper cavity and a lower cavity which are not communicated with each other, and a liquid inlet and a liquid outlet which are communicated with the brine main pipe are formed in the top of the pipe body of the freezing pipe; a heating plate is arranged in the partition plate; low-temperature saline water in the freezing station enters an upper cavity of the freezing pipe through the saline water main pipe to freeze a soil body, and anti-permeation isolation is carried out; the driving motor drives the lead screw to rotate, the lead screw drives the nut lifting plate to move up and down in the pipe body of the freezing pipe, the height of the upper cavity is adjusted, and freezing of stratums of different depths is achieved. And the heating plate is used for heating the low-temperature saline water in the freezing pipe and unfreezing the soil body.

The present invention discloses a wear-resistant liquid-cooled cable with an ultra-large current load for new energy, and belongs to the technical field of liquid-cooled cable processing. The present invention is used to solve the technical problem in the prior art that the wear resistance of liquid-cooled cables and the heat dissipation efficiency in high-temperature environments need to be further improved. A wear-resistant liquid-cooled cable with an ultra-large current load for new energy includes a plurality of conductors, and the exteriors of the plurality of conductors are sequentially provided with an insulating layer, a shielding layer, and an outer sheath layer; a heat exchange layer composed of a plurality of heat exchange tubes is provided between the shielding layer and the outer sheath layer, and the plurality of heat exchange tubes are all arranged in a spiral shape. The present invention improves the heat exchange performance inside the cable by preparing the insulating layer using a thermally conductive filler, and improves the thermal insulation and wear resistance of the cable outer sheath layer by preparing the cable outer sheath layer by synthesizing a composite polyolefin, thereby obtaining a liquid-cooled cable with high heat exchange efficiency inside, wear resistance outside, and suitable for high temperatures.

The utility model discloses a groove type ultrasonic cleaning machine which comprises a groove body and a placing frame, and the placing frame is arranged in the groove body and used for placing a piece to be cleaned. A vibrating plate is arranged at the bottom in the tank body; a plurality of ultrasonic generators are uniformly arranged at the bottom of the vibrating plate; a mounting plate is arranged on one side in the tank body and used for dividing the interior of the tank body into a floating area and a cleaning area. The floating area is not communicated with the bottom of the cleaning area; a material passing opening is formed in the side, close to the top, of the mounting plate. And a lifting plate is movably connected to one side of the mounting plate, is used for blocking the material passing opening and can be adjusted up and down. The interior of the tank body is divided into the floating material area and the cleaning area through the mounting plate, the bottoms of the floating material area and the cleaning area are not communicated, pollutants in the cleaning area and the floating material area can be effectively isolated, impurities and greasy dirt floating on the water surface can automatically flow into the floating material area through the lifting action of the lifting plate, and the problem of secondary pollution is effectively avoided.