31results about How to "Prevent overpressure" patented technology

The utility model discloses a riveting press for a transmission shaft with a quick-change connector, and relates to the field of machining and assembling. Comprising a riveting press body, a riveting press working device, a riveting head, a sliding buckle, a limiting column and a pressure sensor. The riveting head is installed below the riveting press working device, the riveting press working device and the riveting head are connected through the sliding buckle, rapid disassembly and assembly of the riveting head are achieved, the limiting column is used for fixing the riveting head, riveting stability is ensured, manual installation errors are reduced, and replacement efficiency is improved. The pressure sensor is arranged below the riveting head, the pressure value in the riveting process can be monitored in real time, the pressure sensor is in linkage with the control box for feedback adjustment, it is ensured that the pressure of each riveting point is consistent, and the riveting quality and the product reliability are improved.

The package comprises a sterile bag (3) filled with liquid diluent, a bottle (9) fitted with a pierceable cap (26) for containing a medicinal or nutritional substance, and a tube (12) extending from the bag and terminating in a coupling and piercing device (16) for the bottle cap. The bag is housed in a sterile, flexible, airtight pouch (1), while the bottle and the coupling and piercing device are housed in a second sterile, flexible, airtight pouch (2).The tube (12) has a portion (13) between the first and second housings, containing a flow diverter (18) adjustable from a first position in which it prevents any communication between the bottle and the bag, to a second position in which it allows the bag to be connected to a leak-proof lateral opening (19) for a syringe (22), or to a third position in which it allows the bottle to be connected to said lateral opening. A flexible tube (42) with a hydrophobic filter (43) is attached to another lateral opening (41) of the flow diverter, terminating in one or both of said sealed sterile pouches and serving as a pressure compensator.

The disclosure provides a low dropout linear regulator circuit and a memory, the circuit comprising: a first transistor, a second transistor and a feedback control circuit; the gate dielectric layer thickness of the first transistor is less than a preset threshold; the first end of the first transistor and the second end of the second transistor are connected to receive a power supply voltage; the second end of the first transistor and the first end of the second transistor are connected to output a target voltage; the control end of the second transistor receives a power-on control signal, and the second transistor is used to output the target voltage during the power-on process; the feedback control circuit is connected with the control end of the first transistor, the feedback control circuit is used to receive the power-on control signal, control the first transistor to be disconnected during the power-on process, and control the first transistor to output the target voltage after the power-on is completed; wherein the power-on control signal is in an enabled state during the power-on process, and is in a disabled state during the remaining period. The disclosure can reduce the circuit area, avoid overvoltage and simplify the timing.

A three-way valve body with an emergency sealing structure belongs to the technical field of three-way valve bodies and comprises a valve body, a sealing partition plate A and two sealing partition plates B are fixedly mounted in the valve body and divide an inner cavity of the valve body into an air inlet cavity and a mixing cavity, two through holes are formed in the upper surface of the sealing partition plate A in a penetrating mode, and the two through holes are communicated with the air inlet cavity and the mixing cavity. The two ports are used for communicating with the corresponding air inlet cavities correspondingly, electric execution power sources are installed in the air inlet cavities in a penetrating mode correspondingly, pressing plates are fixedly installed on the lower surfaces of the electric execution units correspondingly, sealing rings are fixedly installed on the lower surfaces of the pressing plates, and sealing bases are fixedly installed at the ports in the upper surface of the sealing partition plate A; a plurality of contact rings are integrally formed on the upper surface of the sealing base, a plurality of adaptive grooves are formed in the lower surface of the sealing ring, the conical contact rings and the adaptive grooves can be utilized to form multi-stage sealing of multiple contact surfaces, and compared with a traditional single sealing ring, the pressure resistance and the sealing performance of the sealing structure are greatly improved.

This utility model discloses a vacuum nozzle device with pressure detection, including a vacuum nozzle, a push rod, an elastic element, a pressure sensor, a mounting base, and a drive mechanism. The output end of the drive mechanism is connected to the mounting base. The pressure sensor and the elastic element are disposed on the mounting base. Both ends of the elastic element elastically abut against the pressure sensor and one end of the push rod, respectively. The other end of the push rod is connected to the vacuum nozzle. This utility model's vacuum nozzle device with pressure detection can monitor pressure values ​​accurately and instantly, automatically adjust the pressure, effectively extend service life, reduce setup time, and improve production efficiency.

The utility model belongs to the technical field of building construction, and discloses a concrete fixing frame for building construction, which comprises a base, a bottom plate arranged above the base, a support frame rotationally connected to the upper side of the bottom plate, a first side plate and a second side plate rotationally connected to the outer side of the support frame, and an auxiliary slicking mechanism for slicking concrete, the auxiliary slicking mechanism comprises L-shaped fixing blocks arranged at the corners of the supporting frame, vertically-upward fixing stand columns are arranged at the corners of the top ends of the fixing blocks, guide sliding rods are arranged between the two fixing stand columns on the same side, and the number of the guide sliding rods is two. The auxiliary slicking mechanism is arranged at the top of the supporting frame, the push-pull handle is manually pushed and pulled, the push-pull handle drives the movable connecting plate to move along the guide sliding rod through the rotating shaft, the movable connecting plate drives the slicking plate to move, poured concrete can be primarily slicked, the workload of follow-up manual leveling is reduced, and the working efficiency is improved. And the quality of the concrete surface is improved.

An oxygen-enriched gas system, comprising a low-pressure oxygen inlet manifold, the low-pressure oxygen inlet manifold being connected with a plurality of single-system inlet pipes, the single-system inlet pipes being connected with a mixer, the mixer being further connected with a single-system fan; a total cut-off valve, a total pipe pressure gauge and a total pipe temperature gauge are arranged on the low-pressure oxygen inlet manifold; a single-system cut-off valve, a Venturi flowmeter and a single-system regulating valve are arranged on the single-system inlet pipe. The oxygen-enriched gas system is provided, the total cut-off valve, the total pipe pressure gauge and the total pipe temperature gauge are arranged on the low-pressure oxygen inlet manifold, the single-system cut-off valve, the Venturi flowmeter and the single-system regulating valve and other components are arranged on the single-system inlet pipe, and the intelligent linkage is realized by cooperating with a main controller, the flow and the pressure can be accurately regulated and controlled, the oxygen temperature and the oxygen concentration are monitored in real time, and the interlocking protection is realized when the abnormality occurs.

The invention relates to an electronic circuit technology, and discloses a power-off time-delay circuit and a power-off time-delay method of a fan control system, when a power supply module supplies power normally, a key device is supplied with power through a first switching power supply, a charging and discharging unit is charged at the same time, and the power supply starting response time of the key device in a power utilization module is not influenced; when the power supply module supplies power abnormally, the charging and discharging unit discharges the second switching power supply, so that the second switching power supply converts and outputs a proper second voltage to supply power to the key device, thereby realizing a power-off delay function and ensuring that the key device works normally within a certain time. According to the invention, enough delay time can be provided for the system to maintain communication among the control modules, the problem of overvoltage possibly caused by direct use of capacitor discharge is also avoided, and key devices are protected. The invention aims to solve the problem of communication interruption of the fan control system caused by the jitter of the power supply, meet the power-off delay demand of the system, and avoid the influence on the starting response of the system.

The application discloses a modular quick-change module of an OMR vacuum laminating machine and a laminating device, relates to the field of vacuum laminating machines, and comprises a rack, a linear module is mounted on the inner side of the rack, an installation plate is fixedly connected to the top of the linear module, a workpiece is placed on the inner side of the installation plate, a hydraulic cylinder is mounted on the inner side of the rack, and a top seat is fixedly connected to the output end of the hydraulic cylinder; the cooperation of the rectangular plate and other parts enables the second nozzle to start from the sealed end, gradually advance to the middle area and the area close to the other end, and apply uniform pressure; this process not only continuously discharges air to the end, but also assists the close lamination of the film and the workpiece surface through uniform air flow pressure, ensures that the back glue of each area can fully contact the workpiece, reduces the air bubble hidden danger caused by local lamination from the root, and realizes the dead-angle-free air exhaust from one end of the workpiece to the other end, and further reduces the overall air bubble generation rate.

The application provides a paper pressing elastic structure and a paper shredder. The paper pressing elastic structure comprises a first seat, a second seat, a first elastic member and a second elastic member. The top end of the first seat is configured to be close to a cover plate; the top end of the second seat is located in the first seat and is configured to be movable upward relative to the first seat; the top end of the first elastic member is configured to be close to or contact the cover plate, and the bottom end of the first elastic member is arranged on the top end of the second seat and is limited in the horizontal direction by the first seat; the top end of the second elastic member abuts against the bottom end of the second seat, and the bottom end of the second elastic member is configured to be arranged on a paper pressing plate of the paper shredder; and the stiffness coefficient of the first elastic member is smaller than the stiffness coefficient of the second elastic member. By reducing the stiffness coefficient of the first elastic member at the upper level, the first elastic member can provide a larger stroke amount compared with the second elastic member under the same pressure, so that the pressure on the bottom layer of paper can be reduced in the case of multiple papers, and the friction between the papers when the rollers are rubbing the papers can be reduced, thereby facilitating the rollers to rub the papers.

This invention discloses an aluminum-plastic back panel forming device and method, comprising a clamping mold, a trimming mold, a convex bulge forming mold, and a convex dot punching mechanism. The convex bulge forming mold is located inside the clamping mold, and several convex dot punching mechanisms are distributed in the convex bulge forming mold area. The convex bulge forming mold includes an upper convex bulge forming mold, which is connected to the bottom side of a transition plate via an elastic reset member. The elastic reset member pulls the upper convex bulge forming mold against the bottom side of the transition plate. The convex dot punching mechanism includes a convex dot punch rod, the upper end of which is fixedly connected to a main drive plate. The convex dot punch rod is connected to the upper convex bulge forming mold via a transmission structure, and is used to drive the upper convex bulge forming mold to complete the convex bulge forming after the convex dots are formed. This invention can ensure the stamping performance of the aluminum-plastic back panel structure formed in one stamping process and guarantee the forming quality of the aluminum-plastic back panel.

This application discloses a multi-boiler intermodal system, relating to the field of generator set technology. It includes multiple boilers and multiple steam turbines. Each boiler's main steam pipe is connected to a common main steam header. Each steam turbine corresponds one-to-one with one of the boilers. The main steam header distributes main steam to the high-pressure cylinders of each turbine as needed. Each turbine's high-pressure cylinder sends exhaust steam to the boiler reheater via a reheat cold section pipe and a reheater inlet pipe. Each reheat cold section pipe is equipped with a make-up steam pipe. Each boiler reheater sends steam to the intermediate-pressure cylinder of the turbine via a reheat hot section pipe. Each reheat hot section pipe is equipped with an extraction steam pipe. This application can ensure that the main steam, cold reheat, and hot reheat parameters are consistent with the operating requirements of each system device, and can achieve decoupling of the boiler and turbine units, promoting flexible unit operation.

The utility model discloses a battery quick dismounting structure which comprises a first shell and a second shell, the first shell, a dismounting assembly and the second shell are detachably connected, a battery bin is formed in the first shell and the second shell, and a battery module is installed in the battery bin; the disassembling assembly is arranged on the side edge of the connecting position of the first shell and the second shell, and unlocking and locking of the first shell and the second shell are achieved by pulling and inserting the disassembling assembly. According to the utility model, the first shell and the second shell can be quickly disassembled and assembled by designing the disassembling and assembling assembly; wherein the key part is assembled in an interference fit manner through flexible glue, and the assembly can be completed by hands conveniently and quickly. The battery blocks are fixed through the battery fixing ribs, stability is higher, disassembly and assembly are convenient, conduction connection of the battery blocks can be guaranteed through the battery foam, and poor conduction can be prevented. And the battery modules are assembled through the buckles, can be assembled manually, and are convenient and fast.

The invention relates to the technical field of fluid control, in particular to an electric control prefill valve and a control method thereof.The electric control prefill valve comprises a valve body, a priority valve, an electromagnetic valve, a pressure sensor and a selector valve, the valve body is provided with a main oil way, a prefill opening and an unloading opening, the priority valve, the electromagnetic valve and the selector valve are sequentially arranged along the main oil way and communicate with one another, and the prefill opening communicates with the priority valve; an oil return port of the electromagnetic valve is communicated with the unloading port; the pressure sensor comprises a lower limit sensor and an upper limit sensor; the sensing end of the lower limit sensor is communicated with the main oil way; the upper limit sensor is vertically arranged above the valve body, and the sensing end of the upper limit sensor is communicated with the main oil way. The hydraulic system has the advantages that the hydraulic system pipeline is simplified, the leakage risk is reduced, the hydraulic pressure at the working oil port can be adjusted according to the actual situation, and the energy utilization efficiency, the response speed and the reliability of the braking system are remarkably improved.

The utility model discloses a steam-gas seal steam leakage cooling system of a supercritical back pressure steam turbine, and relates to the technical field of steam turbine power generation, a plurality of branch pipelines are branched from a high-pressure shaft end steam seal pipeline group and are communicated with a water spraying assembly, and a low-pressure shaft end steam seal pipeline group is also communicated with the water spraying assembly; an expansion chamber formed by local diameter expansion is arranged at the connection part of the water spraying assembly; the branch pipeline terminal and the low-pressure shaft end pipeline terminal converge to a cooling pipeline, the cooling pipeline is communicated with a cooler, and safety pipelines and electric valves are arranged on the upstream portions of the high-pressure shaft sealing pipeline set and the low-pressure shaft sealing pipeline set. When the system works, efficient cooling of steam seal leakage under supercritical parameters is achieved through graded water spraying cooling, chamber expanding for gas-liquid mixing strengthening, secondary cooling of a cooling pipeline and emergency switching of a safety pipeline, compared with a traditional technology, the cooling efficiency is improved, the safety redundancy is improved, and the system can adapt to steam turbine load fluctuation; the device has the advantages of high cooling efficiency, safety, reliability, convenient maintenance and the like.

The utility model relates to the technical field of waste water recovery, in particular to a waste water recovery device which comprises a device frame, a liquid storage tank is mounted in the device frame, a mounting seat is mounted on the surface of the top of the liquid storage tank through screws, and a controller is mounted on the surface of the device frame. An indicator lamp is installed on the surface of the controller, a stainless steel centrifugal pump is installed on the surface of the top of the mounting base, a liquid level detection mechanism is arranged on the surface of the liquid storage tank, and a vacuumizing prevention mechanism is arranged on the surface of the liquid storage tank. When the recovery device is used, the stainless steel centrifugal pump can be automatically controlled to be started or closed, water shortage protection and overflow prevention can be carried out on the interior of the liquid storage tank when the recovery device is used, and the phenomenon that water cannot enter the liquid storage tank due to vacuum pumping or internal pressure can be prevented when the recovery device is used.

The invention discloses an energy recovery method, device and equipment based on a power battery pack and a storage medium, relates to the technical field of energy recovery, and discloses the energy recovery method based on the power battery pack. Comprising the following steps: acquiring current energy recoverable power, current energy recoverable power information, current energy recovery power and current cell voltage of a power battery pack; according to the current energy recycling power, the current cell voltage and the current energy recycling power information, the current energy recycling power is adjusted step by step, and the adjusted current energy recycling power is obtained; and controlling the current energy recovery power based on the adjusted current energy recoverable power so as to complete energy recovery based on the power battery pack. According to the scheme, the overvoltage risk in the high SOC state can be effectively avoided while the energy recovery efficiency is guaranteed.

The invention provides a pressure accumulator diaphragm capsule vibration tool and a regulation and control method thereof. The tool comprises a tool upper cover, a tool lower base, a heat insulation plate and an adapter plate. The adapter plate is fixed on the vibration table surface; the tool lower base, the thermal insulation plate and the adapter plate are fixedly connected; a pressure accumulator diaphragm capsule is placed in the tool lower base; the tool upper cover is fixedly connected to the top of the tool lower base, and an independent cavity is formed between the inner wall of the tool upper cover and the pressure accumulator diaphragm capsule so as to provide a low-temperature vibration environment. A liquid nitrogen inlet, a liquid nitrogen outlet and a nitrogen outlet are formed in the tool upper cover; and the liquid nitrogen inlet, the liquid nitrogen outlet and the nitrogen outlet are respectively connected with a liquid nitrogen inlet pipeline, a liquid nitrogen return pipeline and a nitrogen discharge pipeline. The tool is simple in structure, accurate pressure window control can be achieved, the continuous circulating liquid supplementing function in the low-temperature vibration process is achieved, the tool can achieve large-amplitude vibration loading on a small-tonnage vibration table top by optimizing a force transmission path and reducing the dead weight of a system, and the test controllability and the test efficiency are improved.

The application provides a portable moraine sampling and preserving device and method, which comprises a supporting frame, a heat-preservation sampling mechanism, a refrigerating box and a controller, the heat-preservation sampling mechanism is rotationally connected to the supporting frame, the heat-preservation sampling mechanism comprises a shell, a sampling sleeve and a sampling pusher; the sampling sleeve is axially slidably connected in the shell, one end of the sampling pusher is fixedly connected to the shell, and the other end of the sampling pusher extends into the shell and is detachably connected with the end of the sampling sleeve, and the refrigerating box is internally provided with a sample cavity for accommodating the sampling sleeve. The sampling pusher is used to drive the sampling sleeve to axially drill and sample, instead of traditional manual excavation and a thin-wall soil sampler, so that the disturbance to the original structure and stress state of the moraine is greatly reduced, the representativeness of the soil sample is improved, and the pore ice is prevented from being damaged due to extrusion.

The utility model relates to ladle technical field, concretely is a kind of safety system of ladle tilting device. Including energy storage system, O type electromagnetic reversing valve, balance valve, hydraulic cylinder, first unloading oil circuit and second unloading oil circuit;The energy storage system is connected with oil tank pipeline, and energy storage system, O type electromagnetic reversing valve are connected with balance valve pipeline;The balance valve is directly integrated in hydraulic cylinder oil port or connected with hydraulic cylinder pipeline;First unloading oil circuit one end is connected with the hydraulic cylinder rodless cavity oil port, and the other end is connected with main oil return pipeline;Second unloading oil circuit one end is connected with the hydraulic cylinder rod cavity oil port, and the other end is connected with main oil return pipeline. Solve the major safety hazard, such as ladle accidental tilting, molten steel pouring interruption or falling, caused by hydraulic system failure, electrical fault or sudden power failure in the prior art, ensure the continuity and safety of steel smelting process.

The invention belongs to the technical field of hot melting connection of silicon core pipes, and particularly relates to a hot melting connection device for an HDPE (high-density polyethylene) silicon core pipe, which comprises a U-shaped outer frame, a butt joint mechanism, a clamping mechanism and a positioning mechanism. The butt joint mechanism is arranged on the U-shaped outer frame and controls the ends of the two silicon core pipes on the clamping mechanism to be close to each other. The number of the clamping mechanisms is two, each clamping mechanism comprises a connecting frame connected with the butt joint mechanism, two holding and clamping assemblies are arranged on each connecting frame, one holding and clamping assembly is relatively fixed to the corresponding connecting frame, and the other holding and clamping assembly is slidably connected with the corresponding connecting frame through an adjusting assembly. Through cooperation of the U-shaped outer frame, the clamping mechanism and the positioning mechanism, the clamping mechanism can be rapidly and accurately controlled to be fixed to the optimal clamping position of the silicon core pipe, the movement displacement of the two silicon core pipes can be accurately controlled to be the optimal displacement distance during hot melting butt joint, meanwhile, the pipe bodies are always in a low-bending-stress state in the clamping and cooling process, and the clamping effect is good. Therefore, the connection quality of the silicon core pipe during hot melting connection is greatly improved.

The application discloses a kind of electric toothbrush control method and system based on multi-sensor adaptive weighting fusion, its method includes: posture, pressure, spectrum and acoustic data are synchronously collected;After pre-processing and feature extraction, the evidence of multi-sensor is fused using D-S evidence theory, and the regional confidence distribution and behavior mode label are output;Combining reliability factor and the context factor determined by behavior mode, dynamically generate weighting coefficient, weight and fuse multi-source features, obtain comprehensive cleanliness estimate and fused spectrum characteristics;Based on spectrum characteristics, calculate plaque index, based on acoustic characteristics, calculate brushing efficiency score;With plaque index, brushing efficiency score and pressure safety threshold as constraint, establish multi-objective optimization function, solve optimal vibration frequency and amplitude in real time, realize closed-loop control, with the advantages of strong anti-interference, personalized adaptation and the like.

The application discloses a pump-driven two-phase cooling method and related equipment, and relates to the technical field of heat dissipation of high heat flux density electronic equipment, and comprises a pump-driven two-phase circulation loop, the pump-driven two-phase circulation loop comprising a vapor-liquid separation device, an evaporative cold plate, a main pump and a condenser, the vapor-liquid separation device being used for separating two-phase flow working medium into first liquid working medium and gaseous working medium, the condenser being used for condensing the gaseous working medium into second liquid working medium, and the main pump being used for driving the second liquid working medium into the evaporative cold plate; and an overflow branch, the overflow branch comprising an overflow pump, the overflow pump being used for re-driving the first liquid working medium into the evaporative cold plate, so that the first liquid working medium participates in phase change heat exchange again. Through vapor-liquid separation and overflow recirculation, the application stabilizes dryness, improves condensation efficiency, avoids dryout and overpressure at the same time, and enhances system stability and reliability.

The utility model relates to the technical field of fruit juice beverage production, in particular to a beverage mixing machine for fruit juice beverage production, which is characterized in that three gears 4 rotate to simultaneously drive three connecting rods at the bottom end to rotate, and the three connecting rods drive three stirring rods at the bottom end to rotate; the two stirring blades outside the three stirring rods stir and mix the fruit juice beverage in the tank body, then additives are added into the fruit juice beverage to be continuously stirred, finally, a valve at the top end of a discharging pipe is unscrewed to discharge the fruit juice beverage, and due to the fact that protein and other fungi exist in the fruit juice, sterilization needs to be carried out for facilitating use next time; a discharge pipe of the device is in threaded connection with a steam boiler, the valve is kept in an open state, steam is fed into a tank body, at the moment, in order to prevent overpressure, a pressure release valve is installed at the bottom end of the discharge pipe, and the pressure release valve of the model A48Y-16C is designed to be that when the pressure exceeds a set value, a valve clack can be automatically opened, and redundant steam or fluid is discharged through a pressure release opening.

The utility model relates to the technical field of pulverized coal system valves, and discloses a pressure relief mechanism of a pulverized coal system valve, which comprises a coal conveying pipe and a mechanical pressure relief valve, the bottom of the mechanical pressure relief valve is provided with a feed port, the feed port is fixedly connected to one side of the top of the coal conveying pipe, the middle of the mechanical pressure relief valve is provided with a pressure relief port, and the pressure relief port is fixedly connected to one side of the top of the coal conveying pipe. A circulating pipe is fixedly connected to the interior of the pressure relief opening, an anti-blocking assembly is arranged in the circulating pipe, and a secondary pressure relief assembly is installed on the other side of the top of the coal conveying pipe; the secondary pressure relief assembly comprises a main valve cylinder and a secondary valve cylinder, and one end of the secondary valve cylinder is obliquely installed on the side wall of the main valve cylinder. According to the multi-stage pressure relief device, firstly, the mechanical pressure relief valve is used for quickly reducing the pressure, and then the secondary pressure relief valve is used for stably releasing the pressure, so that the system safety is improved. The pressure relief opening is connected with the circulating pipe to recycle pulverized coal, loss is reduced, blockage is prevented through the ultrasonic vibration rod, pipeline smoothness is guaranteed, and the energy utilization efficiency is improved.

The utility model relates to a pre -compression damping device for precision equipment transportation belongs to transportation damping technical field, the utility model discloses a damping unit, the damping unit includes the upper steel sheet and lower steel sheet of opposite setting, is equipped with the damping pad between the upper steel sheet and lower steel sheet, is equipped with the pre -tensioning piece for adjusting the pre -compression amount between the upper steel sheet and lower steel sheet. The utility model is through the semi -closed cavity for the constraint polyurethane foaming board can only occur vertical direction's deformation, thoroughly solves the lateral rheology problem, through the pre -compression technology matching equipment weight distribution, and the different pre -compression amount is added to the damping unit of different position in array, makes all damping units to best working condition cooperation stress, avoids local overload failure.

The invention discloses a connector technology, and aims to provide a four-core beam-expanding oil-filled optical fiber connector and an assembling method thereof. According to the technical scheme, the oil-filled plug is characterized by comprising a threaded sleeve, a plug shell, a four-optical-fiber beam expanding insulator, a pressure compensator, an oil-filled plug tail clamp, a sealing assembly and a calibration gasket which is clamped between the butt joint end faces of the oil-filled plug tail clamp and the plug shell and used for adjusting the pre-compression stroke of the pressure compensator. The screw sleeve, the plug shell, the four-optical-fiber beam expanding insulator, the pressure compensator, the oil-filled plug tail clamp, the sealing assembly and the calibration gasket jointly define a completely-closed oil-filled cavity, fluorinated oil or synthetic hydrocarbon oil subjected to degassing treatment is injected into the oil-filled cavity through a valve, and the oil-filled cavity is matched with the pressure compensator to construct an active pressure compensation sealing system. The invention is suitable for the technical field of connectors.

The embodiment of the utility model provides a pre-charging circuit and a multi-channel battery energy storage system. The pre-charging circuit comprises a first pre-charging circuit with a first current limiting circuit and a first bypass switch, a second pre-charging circuit with a second current limiting circuit and a second bypass switch, at least one bridge arm, a third pre-charging circuit with a third current limiting circuit and a third bypass switch, at least one bidirectional switch and a control circuit, the first current-limiting circuit and the first bus capacitor which are connected in series are connected with the second current-limiting circuit and the second bus capacitor which are connected in series, one end of the third current-limiting circuit is connected with the midpoint of a bus, and the other end is connected with the midpoint of at least one bridge arm through at least one bidirectional switch. The control circuit is used for controlling the first bypass switch, the second bypass switch and the third bypass switch to be switched off when the absolute value of the voltage difference between the first bus capacitor and the second bus capacitor reaches a voltage difference threshold value. The number of pre-charging circuits is small, the occupied space is small, and the corresponding bus capacitor is prevented from bursting after the bridge arm is short-circuited.

The application discloses a bipolar self-balancing interleaved coupled inductor high-gain converter for a direct-current microgrid, relates to the field of boost converters, and utilizes the winding ratio boost characteristic of the interleaved coupled inductor and the voltage superposition effect of the multi-stage diode-capacitor voltage doubling network to realize high-gain output and power expansion, adopts the mixed method of the voltage doubling network and the switched capacitor network on the output side to improve the output voltage, and through the organic combination of the interleaved coupled inductor structure and the voltage doubling network and the switched capacitor network, a high boost ratio can be obtained under the condition of a lower duty cycle and a smaller coupled inductor winding ratio, the problems of increased leakage inductance, high magnetic core loss and excessive device stress caused by the dependence of traditional topologies on an extremely high duty cycle or an ultra-large winding ratio are avoided, the boost capability under a wide input voltage range is significantly improved, and the bipolar self-balancing interleaved coupled inductor high-gain converter is suitable for the scene of supplying power from low-voltage new energy such as photovoltaic energy and energy storage to a high-voltage direct-current bus.