426results about How to "Improves sealing reliability" patented technology

The invention relates to the technical field of steam extraction check valves, and discloses a design method and device for quickly responding to a steam extraction check valve under a high-parameter working condition, and the method comprises the following steps: constructing a valve working condition database and a valve body database; based on the valve working condition database and the valve body database, a valve performance prediction model is constructed, and a valve state quantity prediction value is obtained through performance influence factors collected in real time; correcting the predicted value to obtain a valve state quantity corrected value; a valve control environment based on reinforcement learning is established, a valve optimization control strategy model is constructed, a real-time optimal control action is generated and executed based on a valve state quantity correction value, and efficient optimization control over the valve is achieved; according to the method, through combination of data-driven performance prediction and reinforcement learning optimization control, rapid response and efficient operation of the steam extraction check valve under the high-parameter working condition are achieved, and the reliability and the energy-saving effect of the system are improved.

The invention discloses a battery device and a power utilization device, and the battery device comprises a box body which is internally provided with a containing cavity and comprises a first plate; the heat exchange assembly comprises a first heat exchange part and a second heat exchange part which communicate with each other, the first heat exchange part is arranged outside the box body, and the second heat exchange part is arranged on the face, facing the containing cavity, of the first plate; the connecting block is arranged on the first heat exchange part; the heat exchange connector penetrates through the connecting block in the first direction and then is connected with the open hole in the first heat exchange part in a sealed mode, and the heat exchange connector is located outside the connecting block and welded to the connecting block. According to the scheme, the sealing performance of connection between the heat exchange connector and the first heat exchange part can be guaranteed, the sealing performance of the heat exchange connector and the connecting block can be guaranteed, and the sealing performance of the heat exchange connector during connection is effectively improved. Due to the fact that the heat exchange connector is connected with the first heat exchange part and the connecting block in a sealed mode, the sealing reliability can be improved.

The invention provides a battery monomer, a battery and a power utilization device, and belongs to the technical field of batteries. Wherein the battery monomer comprises a shell, a pole column body and a pole column cover plate, the shell defines a containing cavity, the pole column body is arranged on the shell, a communication channel communicated with the containing cavity is formed in the pole column body, the pole column cover plate is arranged on the pole column body, and a liquid injection hole communicated with the communication channel is formed in the pole column cover plate. According to the battery monomer, the area of the pole structure is increased under the condition that the size of the shell is not changed, so that the current passing efficiency of the battery monomer is improved, the processing and forming of the liquid injection hole are facilitated, the structure and processing of the shell are simplified, in addition, in the production and use processes, the possibility of splashing and overflowing of electrolyte is reduced, and the service life of the battery monomer is prolonged. Therefore, the reliability and the manufacturability of the battery monomer are improved.

The invention discloses a proton exchange membrane electrolytic cell sealing bipolar plate, which belongs to the technical field of water electrolysis hydrogen production, and comprises a bipolar plate body, a water inlet, a water / oxygen outlet, a first hydrogen outlet, a second hydrogen outlet, a water / oxygen flow field area, a hydrogen flow field area, an anode closed sealing groove and an anode sealing ring, the first hydrogen outlet, the water / oxygen outlet, the second hydrogen outlet and the water inlet are positioned at the edge of the bipolar plate body and are through holes; the first hydrogen outlet and the second hydrogen outlet are diagonally arranged; the water inlet and the water / oxygen outlet are diagonally arranged; a water / oxygen flow field area is arranged on the anode surface of the bipolar plate body; a hydrogen flow field area is arranged on the cathode surface of the bipolar plate body; the anode closed sealing groove is formed in the anode surface of the bipolar plate body; and an anode sealing ring is arranged in the anode closed sealing groove. The water / oxygen flow field area and the hydrogen flow field area are optimally designed, so that water flow can be more uniformly distributed, and gas flow is enhanced.

The invention discloses a pressure detection module and a pressure sensor. The pressure detection module comprises a pressure joint used for being connected to a detected pipeline and provided with a fluid passage used for being in fluid communication with the detected pipeline; the force sensitive component is connected to one end of the pressure joint and is in fluid communication with the pressure joint; the strain gauge is attached to the surface of the force sensitive part and is used for detecting the strain of the force sensitive part; the electric connector comprises a seat body and a contact pin which passes through and is fixed on the seat body; the electric connection plate is used for electrically connecting the contact pin to the strain gauge; and the end cap comprises a peripheral wall, an end wall and an opening opposite to the end wall. The force sensitive part and the electric connecting plate are accommodated in the inner cavity of the end cap, and one end of the pressure joint is welded to the opening end of the end cap so as to seal the opening of the end cap; an insertion hole is formed in the end wall of the end cap, and the seat body is inserted into the insertion hole and welded to the end wall so as to seal the insertion hole of the end cap. The sealing structure is simple, high in sealing reliability and low in cost.

The invention relates to a sealing structure and a container, and belongs to the technical field of equipment sealing. One of the sealing structures includes a ring assembly including an elastic energy storage ring; the floating ring is provided with a container barrel contact wall surface and a container end cover contact wall surface, a first mounting position is arranged on the container barrel contact wall surface, and a second mounting position is arranged on the container end cover contact wall surface; and the first mounting position and the second mounting position are both provided with the ring assemblies. The ultrahigh-temperature and high-pressure sealing condition can be met during use, large matching clearances can be adopted between the floating ring and the container end cover and between the floating ring and the container barrel by utilizing the characteristics of the floating ring and the elastic energy storage ring during assembly, and installation is convenient.

The invention provides a fluid type shaft driving mechanism which comprises a cylinder body, a main shaft and a transmission arm, the transmission arm is arranged in the cylinder body and can rotate in the cylinder body around the axis of the main shaft, and the cylinder body is divided into a first cavity and a second cavity by the transmission arm. The first sealing bag body is arranged in the first cavity, the second sealing bag body is arranged in the second cavity, and fluid connectors are arranged on the first sealing bag body and the second sealing bag body. When the fluid enters the first sealing bag body, the transmission arm is pushed to move towards the direction of the second cavity; and when the fluid enters the second sealing bag body, the transmission arm is pushed to move towards the direction of the second cavity. According to the fluid type shaft driving mechanism, the manufacturing cost is reduced, and the output torque of the swing driving mechanism is improved.

The invention discloses an ultrahigh-pressure subsurface safety valve, belongs to the technical field of petroleum and natural gas well completion, and aims at solving the problem that an existing subsurface safety valve is prone to leakage under the high-pressure condition. The ultrahigh-pressure subsurface safety valve comprises an upper connector (1), a spring barrel (3) and a lower connector (4) which are sequentially connected from top to bottom, and a piston cavity (28) is formed in the side wall of the upper connector (1); a piston mechanism is connected into the piston cavity (28) in a sealing mode, a positioning sealing nut (9) is arranged in the lower end of the piston cavity (28), and when the valve plate sealing mechanism is in an open state, the piston mechanism is connected with the positioning sealing nut (9) in a metal sealing mode. When the valve plate sealing mechanism is in a closed state, the piston mechanism is in metal sealing connection with the surface of the piston cavity (28). Under the conditions of high pressure and high temperature, the metal sealing connection performance is not easy to change, the product stability is improved, and the purpose of reducing the leakage rate of the safety valve is achieved.

The invention provides a high-temperature-resistant electric connector and a preparation method thereof, and relates to the technical field of electric connectors. The high-temperature-resistant electric connector comprises a contact body, an insulator, a shell and a split ring structure, the split ring structure is arranged between the insulator and the shell, the split ring structure comprises an annular side wall and a base connected to one axial end of the annular side wall, the base and the annular side wall define a cavity used for containing the insulator, a notch is formed in the annular side wall, and the insulator is arranged in the cavity. The notch extends in the axial direction of the annular side wall, and one end of the notch communicates with the opening of the cavity. The split ring structure is additionally arranged between the insulator and the shell, sealing connection between the insulator, the contact body and the split ring structure is achieved through brazing, internal stress concentration during service of the insulator and the shell is remarkably reduced, and the sealing reliability between the insulator and the shell in the electric connector at the high temperature is improved; and the sealing performance of the product can meet the actual use requirement.

The invention discloses a rectangular waveguide sealing window structure for realizing broadband transmission, which belongs to a microwave signal detection device and comprises a first rectangular waveguide cavity, a second rectangular waveguide cavity and a rectangular dielectric block arranged between the first rectangular waveguide cavity and the second rectangular waveguide cavity, the first rectangular waveguide cavity comprises a first rectangular waveguide shell and two first stepped transition structures embedded into an inner cavity of the first rectangular waveguide cavity, and the second rectangular waveguide cavity comprises a second rectangular waveguide shell and two second stepped transition structures embedded into the second rectangular waveguide shell. The opposite side faces of the two first stepped transition structures and the two second stepped transition structures are provided with identical tooth-shaped steps, the second rectangular waveguide shell is further internally provided with an installation cavity communicated with the second I-shaped sliding groove, the two waveguide cavities are connected through screws, and the rectangular dielectric block is fixedly installed in the installation cavity. The vertically symmetrical multi-stage stepped impedance matching network provided by the invention realizes excellent transmission performance with low voltage standing-wave ratio in a wide frequency band, and is suitable for a millimeter wave system with high power and wide frequency band.

The utility model provides a check valve which comprises a valve body, a valve cavity is formed in the valve body, and an inlet and an outlet which are communicated with the valve cavity are formed in the two ends of the valve body respectively. The first valve seat and the second valve seat are arranged on the inner side of the inlet and the inner side of the outlet respectively; the guide shaft is connected to the first valve seat and the second valve seat in a sliding manner; the valve clack is connected to the guide shaft; the elastic piece is arranged between the valve clack and the second valve seat, and the valve clack can block the inlet under the action of the elastic piece; the guide shaft is connected to the first valve seat and the second valve seat in a sliding mode, the layout structure of double supports at the two ends of the guide shaft is achieved, the overlong part of the guide shaft is prevented from being in a suspended state, the guide shaft is prevented from being abraded under the action of the bending moment of a cantilever, stable operation of the valve clack is guaranteed, and therefore the sealing reliability of the check valve is improved.

The invention discloses a light and small wide-temperature-amplitude laser for space application. The light and small wide-temperature-amplitude laser comprises a laser base, a laser shell and a laser resonant cavity. The laser base and the laser shell are combined to form a sealed cavity; the laser resonant cavity is located in the sealed cavity and comprises an LD array, an LD coupling assembly, a laser crystal, a polarization element, an electro-optical Q switch, a quarter-wave plate and an output mirror which are sequentially arranged, and pump light emitted by the LD array sequentially passes through the coupling assembly, the laser crystal and the polarization element and is emitted through the quarter-wave plate and the output mirror when the electro-optical Q switch is turned on. The weight of the laser can be greatly reduced, the size of the laser is reduced, meanwhile, wide-temperature-amplitude work can be achieved, and the work power consumption of the laser is reduced.

The high-pressure hydrogen storage cylinder sealing structure comprises a plastic inner container, a cylinder valve seat and a locking nut, the cylinder valve seat is located at a cylinder opening of the plastic inner container, the locking nut is in threaded connection with the cylinder valve seat, and extrusion sealing is formed among the locking nut, the plastic inner container and the cylinder valve seat. The sealing device is simple in structure and convenient to install, the multi-sealing effect can be achieved by tightening the locking nut, the air tightness of connection between the plastic inner container and the metal valve seat can be guaranteed, the failure probability is reduced, and the sealing reliability is improved; by arranging the structure with the rotation stopping function and adopting the structure that the plastic inner container wraps the shoulder of the cylinder valve seat, the combination effect of the plastic inner container and the cylinder valve seat is promoted, the connection strength and the overall stability of the structure can be improved, it is guaranteed that the plastic inner container and the cylinder valve seat cannot be separated under the long-term working state, and the service life of the cylinder valve seat is prolonged. Potential safety hazards caused by pressure rise after the hydrogen storage cylinder is inflated are avoided, and the service life and the safety of the hydrogen storage cylinder are effectively prolonged and improved.

The application relates to the technical field of wastewater treatment equipment, in particular to a zero-emission multistage wastewater treatment device for industrial high-salinity wastewater, which comprises a base, a fixing frame fixedly installed on the base and a supporting limiting frame fixedly installed on the fixing frame, the supporting limiting frame is slidably connected with a heat exchange box, the front end face of the fixing frame is provided with limiting assemblies corresponding to the heat exchange box on both sides, a sedimentation tank and a core treatment tank are installed on the fixing frame from top to bottom and located at the bottom of the heat exchange box, the heat exchange box, the sedimentation tank and the core treatment tank are sequentially communicated through connecting channels, a feeding pipe is arranged on the side wall of the sedimentation tank, the sealing assembly is driven to rotate by a motor-driven screw rod, the extrusion frame is driven to slide along the guide column, the pressure of the extrusion frame on the third sealing frame can be automatically adjusted, the extrusion plate can be tightly combined with the third sealing frame, the pressure is uniformly distributed, the traditional manual sealing adjustment mode is replaced, and the sealing reliability is further improved.

The utility model relates to the technical field of flanges, and discloses a flange connecting structure which comprises a first flange, a second flange, a first sealing piece and a second sealing piece. The first flange comprises a first connector part and a first connecting part, the first connector part is provided with a first flow channel, and the first connecting part is arranged around the first end of the first connector part; the second flange comprises a second connector part and a second connecting part, the second connector part is provided with a second flow channel, the second connecting part is arranged around the first end of the second connector part, and the end face of the first end of the second connector part is in sealed butt joint with the end face of the first end of the first connector part so that the second flow channel can communicate with the first flow channel; the first connecting part and the second connecting part are fixedly connected through a bolt; a first sealing piece and a second sealing piece are arranged between the first end face of the first connector part and the first end face of the second connector part, and at least one cooling liquid cavity is formed in the pipe wall of the first connector part. The flange connecting structure can improve the sealing reliability.

The large-diameter double-spring safety valve comprises a valve body, a water inlet channel, a water outlet channel, a valve rod and a valve seat arranged on the water inlet channel are arranged in the valve body, the valve rod is sleeved with a valve clack which is connected with the valve seat in a sealed mode and used for controlling the communication state of the water inlet channel and the water outlet channel, and a first installation cavity is formed in the water inlet channel. A diaphragm and a first magnetic part are arranged in the first installation cavity, the valve rod comprises an upper valve rod body and a lower valve rod body, a second installation cavity is formed in the upper valve rod body, a second magnetic part is arranged in the second installation cavity, and the first magnetic part and the second magnetic part are arranged in a magnetic pole repelling mode. After water enters the water inlet channel, the diaphragm is driven to move, then the first magnetic piece is moved, the second magnetic piece repelling the first magnetic piece abuts against the upper valve rod through repelling magnetic force, and the upper valve rod moves to drive the valve clack to open the water inlet channel and the water outlet channel to communicate for water outlet.

The invention discloses a fuel oil drainage control device and method for a multi-oil-way gas turbine or an aero-engine and application, belongs to the technical field of fuel oil control of gas turbines or aero-engines, and is used for rapidly, safely and reliably discharging multi-oil-way fuel oil when the engine is in a stopped state. And meanwhile, independent operation and sealing performance of each oil way in a normal operation state are ensured. The device comprises an upper shell, a lining, an end cover, a valve, a reset spring, an ejector rod and an electromagnetic driving component, a plurality of sets of fuel oil through holes and oil drainage through holes are formed in the lining, and accurate separation and control of a fuel oil channel are achieved through an annular step part and a conical surface sealing structure. The method comprises the steps of initialization, engine normal work, parking oil drainage preparation, fuel oil drainage, multi-oil-way sequential drainage, drainage completion, system reset and the like. The oil drainage device is reasonable in structural design, accurate in control method, remarkable in sealing performance and oil drainage efficiency, suitable for various complex working conditions and wide in application prospect and engineering value.

The utility model discloses a freeze-drying bottle cap assembly which comprises a freeze-drying bottle and a bottle cap, and a convex part is arranged on the outer surface of a bottle body of the freeze-drying bottle; an upper groove and a lower groove are formed in the inner wall of the bottle cap and are the first groove and the second groove respectively, and the second groove is used for being connected with the protruding part in a clamped mode to achieve a half-plug-pressing state. The first groove is used for being connected with the protruding part in a clamped mode, and the full-pressing plug state is achieved. The freeze-drying bottle cap assembly can reliably achieve the half plug pressing state.

This utility model discloses a planar magnetron sputtering device belonging to the technical field of vacuum coating equipment. The device includes a motor, a main body, a target material, a cooling backplate, and a base. The core of this application lies in the fact that the cooling backplate is composed of a cooling substrate and a cover plate. The cooling substrate has a specially shaped receiving groove, which includes a first groove segment and a second groove segment connected to each other along its depth direction. The cover plate is embedded in the first groove segment to seal the lower second groove segment, thereby forming a completely closed cooling channel. This utility model, through this permanent sealing structure of embedding the cover plate in the receiving groove, replaces the traditional removable mechanical seal that relies on sealing gaskets, fundamentally solving the technical problem of leakage easily occurring in large-size cooling backplates under high water pressure.

The utility model relates to gas pipe correction technical field especially, it relates to a kind of PE gas pipe correction clamp, solve the problem that the pipe wall is prone to local indentation, flattening or stress concentration, and new plastic deformation is easily caused in the clamping area of pipe body when only applying correction force from outside in prior art due to the certain flexibility and elasticity of PE material.A kind of PE gas pipe correction clamp, including frame, both sides of frame are fixedly connected with side plate, and the opposite side of two side plates is equipped with arc clamping plate, and the bottom of two arc clamping plates is slidably connected between the bottom of frame, both sides of frame are equipped with support rod, and the one end of two support rods is respectively through both sides of frame.The utility model effectively solves the problem that pipe wall is prone to flattening, indentation or uneven stress due to lack of inside support in existing correction clamp, realizes the simultaneous support and uniform stress of inside and outside of PE gas pipe.

This utility model discloses a fixing structure for a connector and wiper arm in a windshield washer blade, including a wiper arm and a connector. The connector has at least one flow channel inside and is provided with at least one water inlet socket and at least one water outlet socket. The water inlet socket and the water outlet socket communicate with both ends of the flow channel. The water outlet socket is inserted into at least one water inlet of the flow channel element, and the water inlet socket is connected to a water supply pipe in the windshield washer blade. The key feature is that a spring piece is provided on at least one side of the connector, and a first opening is provided on at least one side of the wiper arm corresponding to the position of the connector. During installation, the spring piece elastically deforms and locks into the first opening. This utility model, by fixing the connector to the wiper arm and then fixing it to the water inlet on the flow channel element, eliminates relative movement, improves sealing reliability, and simplifies assembly.

The application discloses a battery monomer, a battery device and a power utilization device, and relates to the technical field of batteries. The battery monomer comprises a shell assembly, an electrode assembly and a pole post assembly, the pole post assembly comprises a pole post main body and an adapter, the adapter is welded with a first shell wall, at least one identification part is formed on the side surface of the adapter away from the accommodating cavity, the identification part is arranged between the outer circumferential edge of the pole post main body and the outer circumferential edge of the adapter in the radial direction of the adapter, the identification part is configured to be visually detected and identified, the surface roughness of the identification part is smaller than the surface roughness of the remaining part of the side surface of the adapter away from the accommodating cavity except the identification part, and the surface roughness of the remaining part of the side surface of the adapter away from the accommodating cavity except the identification part is smaller than the surface roughness of the outer circumferential wall of the adapter. Therefore, the position grasping accuracy of the outer circumferential edge of the adapter can be improved through the identification part, the welding quality of the adapter and the first shell wall is improved, and the reliability of the battery monomer is improved.

The invention discloses a novel-structure commercial vehicle AMT pneumatic control module, and particularly relates to the technical field of pneumatic control modules, the novel-structure commercial vehicle AMT pneumatic control module comprises a middle partition plate, a valve plate is arranged at the top of the middle partition plate, side face supports are arranged on the two sides of the front end of the top of the valve plate, and a top support is arranged at the top of the valve plate; a first two-position two-way electromagnetic valve and a second two-position two-way electromagnetic valve are arranged on the inner sides of the two side face supports respectively, and a first two-position three-way electromagnetic valve is arranged on the rear side of the top of the valve plate. A plurality of various electromagnetic valves are integrated through the valve plate, power-on and power-off combinations of different electromagnetic valves are controlled, gas from the main gas inlet can be subjected to distribution, reversing and power-on and power-off control, accordingly, mechanisms such as a gear shifting actuator and a clutch actuator of the automotive AMT system are driven to act, manual gear shifting is not needed, and the cost is reduced. The side supports, the top support and the valve plate are combined, meanwhile, an air source system of a vehicle is utilized, the space utilization rate is greatly increased, the structure is compact, and external connecting pipelines are reduced.

This utility model relates to vehicles, specifically providing a differential, a vehicle transmission assembly, and a vehicle, aiming to solve the problem of excessive internal oil pressure affecting the sealing effect of the oil seal in the differential. To this end, the differential of this utility model includes: a support base with a first through hole, the inner wall of which has an annular groove; an input shaft; and an adjusting ring disposed within the annular groove, with a clearance fit between the adjusting ring and the inner wall of the annular groove, allowing oil to flow through the gap on both sides of the adjusting ring. This utility model, by setting an adjusting ring within the through hole of the differential support base and ensuring a clearance fit between it and the inner wall of the annular groove, achieves free flow of oil under normal operating conditions; when a large oil pressure difference occurs on both sides of the adjusting ring, the adjusting ring automatically adheres to the inner wall of the annular groove under pressure, promptly sealing the gap and effectively isolating the oil flow. This structure can dynamically adjust the internal oil pressure of the differential without changing the original arrangement.

The self-supplemental magnetic liquid sealing device comprises a shell, a rotating shaft and at least one pole shoe. The rotating shaft is internally provided with at least one supplement groove for accommodating standby magnetic liquid. The rotating shaft is provided with an opening in communication with the supplement groove on the peripheral surface. The magnetic property of the multiple pole teeth of the pole shoe increases in a stepped manner in the direction away from the supplement groove. When the rotating shaft rotates, the magnetic liquid in the supplement groove flows out from the opening under the action of centrifugal force and is supplemented into the sealing gap of the multiple pole teeth under the attraction of the pole teeth. The device uses the magnetic field strength gradient to make the magnetic liquid fill the sealing gap. The magnetic liquid can be automatically supplemented or replaced without disassembling or opening the sealing device, thereby reducing the maintenance cost and downtime, effectively solving the problem of evaporation of the magnetic liquid, and improving the sealing reliability and service life of the magnetic liquid sealing device.

The invention relates to the technical field of food storage, and discloses an emergency survival tank and a packaging method thereof.The emergency survival tank comprises a tank body and a cover body matched with the open end of the tank body, and the packaging method comprises the following steps that compressed food and a survival tool assembly are placed in a cavity of the tank body, and the tank body is placed in a vacuum chamber; the cavity containing the compressed food and the survival tool assembly is vacuumized until the cavity reaches a preset negative pressure state; when the cavity reaches a preset negative pressure state, inert gas and / or protective gas are / is filled into the cavity until the gas environment in the cavity forms a preset gas environment; the cover body is sealed at the opening end of the tank body, so that the closed space for maintaining the gas environment is formed in the cavity, and through the arrangement mode, the gas environment in the cavity can reach the preset gas environment, so that the fresh-keeping period of food in the preset gas environment can meet the requirement of the emergency survival tank for 3-5 years or even longer.

The invention discloses a crystal growth synthesis furnace which comprises a composite furnace body, a heating and temperature control system, an optical observation window assembly and a growth monitoring and control system. A furnace chamber of the composite furnace body is of a multi-layer gradient composite lining structure composed of a pressure-bearing water-cooled jacket, a carbon fiber reinforced silicon carbide composite material layer, a foam silicon carbide ceramic heat insulation layer and high-purity graphite paper. The heating and temperature control system adopts a distributed design and comprises a main heater, an upper auxiliary heating ring, a lower auxiliary heating disc and a lateral compensation heater. The optical observation window assembly is fixed to the center of the upper furnace cover and matched with the high-speed imaging unit to achieve in-situ monitoring of the growth process. According to the crystal growth synthesis furnace provided by the invention, accurate regulation and control of a three-dimensional temperature field and real-time visual monitoring of a growth interface in a silicon carbide crystal growth process are realized, and the crystal quality, the growth success rate and the process repeatability are remarkably improved.

The utility model discloses an electric steamer with an outer water tank, which comprises a base, a steamer assembly arranged on the base and the outer water tank, a steam generating cavity is arranged in the base, a water outlet is arranged on the wall of the outer water tank, a water inlet is arranged on the wall of the steam generating cavity, a connecting pipe is arranged between the water outlet and the water inlet, and the outer water tank is arranged on the outer water tank. The connecting pipe is a flexible sealing pipe, one end of the flexible sealing pipe is connected with the wall of the outer water tank in a sealed mode, and the other end of the flexible sealing pipe is connected with the wall of the steam generating cavity in a sealed mode. According to the electric steamer, the flexible sealing pipe is connected between the outer water tank and the wall portion of the steam generating cavity in a sealed mode, sealing reliability can be guaranteed, a sealing ring is omitted, meanwhile, the machining difficulty of the outer water tank is lowered, the requirement for the coaxiality of the connecting pipe, the water outlet and the water inlet is lowered, the error-tolerant rate deviation is high, and the service life of the electric steamer is prolonged. And the connecting pipe is easy to disassemble and assemble.

The invention discloses a sealing method for an optical fiber element, and relates to the technical field of optical element connection, in the sealing method, a pretreated assembly component is directly sealed under micro-positive pressure inert gas, and the sealing reliability can be improved from multiple aspects of oxidation prevention, atmosphere control, quality improvement, process stabilization and the like; the temperature of the graphite jig changes more gently in the heating and cooling stages, heat permeates uniformly in the heating process, and local thermal shock is avoided; and during cooling, heat is quickly and uniformly dissipated, so that the cooling rate difference of all parts of the sealing piece is reduced, and thermal stress accumulation is greatly reduced. In the sealing heating stage, the graphite jig can quickly and uniformly conduct heat of a heat source, the problem that a local area is overheated or heated insufficiently can be avoided, it is guaranteed that glass solder is synchronously melted and wetted on the whole sealing interface, the defects that the solder is uneven in spreading, local fusion is incomplete and the like due to the temperature gradient are overcome, and the service life of the glass solder is prolonged. And the air tightness and the structural integrity of a sealing interface are ensured.