155results about How to "Reduce the difficulty of sealing" patented technology

The invention relates to the technical field of oil-gas field construction operation equipment, in particular to an anti-sand-accumulation plug valve which comprises a valve body, a valve cover and aplug rod arranged in the valve body. The valve body is connected with the valve cover; the lower end part of the plug rod is connected with a plug; a driver is arranged on the upper end part of the valve body and is connected with the valve body; the driver transmits a torque to the plug rod through a flat key; a sealing rubber core is arranged on the outer part of the plug; a piston is arranged on the upper part of the sealing rubber core; an annular seal cavity is formed among the plug, the plug rod and the piston; a spring is arranged in the seal cavity; the piston, the plug rod, the sealing rubber core and the plug are located in an inner core of the valve body; the inner core of the valve body communicates with an oil passage; and the oil passage is filled with hydraulic oil for driving the piston to move up and down. According to the anti-sand-accumulation plug valve provided by the invention, a gap between the sealing rubber core and the plug can be adjusted, and no gap exists among the plug, the sealing rubber core and the valve body during a pressure-bearing and fluid conveying process, so that sand is prevented from being accumulated.

The invention discloses a Hopkinson bar active pressure confining device for stabilizing pressure. The device adopts a mode of being opened and closed up and down and is convenient for the installation of equipment and exchange of parts. Pressure stabilizing equipment is arranged in the device. A constant pressure confining value can be provided, so that Hopkinson triaxial tests are more accurate. In a collision process, the deformation of a test component causes the variation of the volume of hydraulic oil in the pressure confining device, and the variation of the volume is transmitted to an oil cylinder by a high pressure oil pipe and absorbed by an air bag in the oil cylinder, so that constant pressure value can be provided by active pressure confining in a test process. The device has the characteristics of convenience for design and processing and simpleness for operation. The accuracy of test data is improved. The invention provides an efficient and simple active pressure confining test device.

The invention provides an intelligent gear-shifting top-spray shower head, belongs to the technical field of shower equipment and solves the problems that a conventional top-spray shower head cannot realize automatic gear shifting and is high in cost. The intelligent gear-shifting top-spray shower head comprises a housing with a water inlet formed in the upper side, wherein a plurality of groups of water outlet holes are formed in the bottom of the housing, and mutually independent water outlet cavities of which the number is equal to that of the groups of water outlet holes are formed in the housing; the water outlet cavities are communicated with the groups of water outlet holes in a one-to-one correspondence manner; a leading structure with both a water inlet end and a plurality of water outlet ends, a driving part capable of driving the leading structure, an inductor and a power supply unit capable of powering up the driving part are fixed in the housing; the water inlet end of the leading structure is communicated with the water inlet of the housing, the number of the water outlet ends is equal to that of the water outlet cavities, and the water outlet ends and the water outlet cavities are communicated in a one-to-one correspondence manner; the driving part can drive the leading structure to switch according to an induction signal of the inductor to be optionally communicated with one or more of the water outlet ends. The intelligent gear-shifting top-spray shower head has the advantages of being automatic in control, convenient to use, low in cost and the like.

A 'cabin-in-cabin' working cabin for ordinary-pressure dry welding of underwater pipeline is composed of primary regulating frame, secondary regulating frame, high-pressure cabin, and ordinary-pressure cabin positioned in said high-pressure cabin. Said orindary-pressure cabin is divided into left and right cabins and only welding is conducted in the ordinary-pressure cabin. Its advantage is high welding quality.

The invention relates to a piston-type hydro-pneumatic buffer. A piston rod (1) is internally provided with a floating piston (3); an airtight device (2) and a piston (5) are respectively arranged atboth ends of the piston rod (1); a pressed air cavity (4) and a second oil cavity (9) are respectively arranged at both sides of the floating piston (3); a first oil cavity (8) is formed between the floating piston (3) and an oil cylinder (6) outside the floating piston (3); a first throttling passage and a second one-way valve (15) which is formed from the second oil cavity (9) to the first oil cavity (8) are arranged between the first oil cavity (8) and the second oil cavity (9); an oil seal (7) is arranged between the opening end of the oil cylinder (6) and the piston rod (1); a third oil cavity (10) is formed between the exterior of the piston rod (1) and the inner wall of the oil cylinder (6); and a second throttling passage (11) communicated with the first oil cavity and the third oil cavity and a first one-way valve (12) which is formed from the third oil cavity (10) to the first oil cavity (8) and is a passage larger than the second throttling passage (11) are arranged on the piston (5). The piston-type hydro-pneumatic buffer is provided with the low-pressure third oil cavity so that the oil seal has remarkable leakproof effect and fully exerts the advantages of the piston-type hydro-pneumatic buffer.

The invention discloses a nuclear reactor fuel rod simulating electric heating device and an assembly process. The device comprises a simulation jacket and simulation fuel element pellets, each simulation fuel element pellet is provided with 16 through holes axially extending along the simulation fuel element pellet, thermocouple wire anodes are mounted in part of the through holes, thermocouple wire cathodes are mounted in part of the through holes, and inert gas is stored in the rest through holes. Electric heating rods are mounted in an inner cavity of each simulation fuel element pellet, and a plurality of external wall temperature thermocouples are mounted on the outer side of the simulation jacket. The electric heating device is used for laboratory simulation of nuclear reactor fuel rods to carry out high-temperature degradation and reflooding behavioral experiments of fuel rods for pressurized water reactors under severe accident conditions. A working medium is an aqueous medium, a steam medium or an inert gas medium, a working pressure is 5MPa, a long-term working temperature is 1800 DEG C, and a short-term working temperature is 2400 DEG C.

The invention provides an aircraft composite material wing spar and wing butt zone connection structure. In the structure, a wing spar has a C-type configuration, and is formed by a spar web, a spar upper flange and a spar lower flange; the composite material wing spar is prepared by adopting processes of manual pasting, automatic tape-laying with thermal diaphragm forming, automatic fiber-placement and the like; the wing spar is connected with an outer wing wall plate and a connection joint by adopting fastening parts; and the wing spar is arranged at the joint of a wing butt, is stopped in advance according to the butt joint requirement, is not directly butted with a wing butt, a wing rib or center wing spar, can be used for cutting an end socket to avoid stress concentration caused in avariable cross-section zone when load is transferred, and can perform fillet treatment on an edge zone.

The invention discloses an improved inner-pushing type clamping device for a numerical control tube bending machine and belongs to the field of numerical control tube bending machines. The improved inner-pushing type clamping device solves the problems that an oil cylinder of an existing clamping device for a numerical control tube bending machine is poor in rotation sealing in the autorotation process and is likely to leak oil, and the service life is short. The improved inner-pushing type clamping device comprises a flexible chuck, an oil cylinder and a component, wherein the flexible chuck and the oil cylinder are connected through the component. The component for connecting the flexible chuck and the oil cylinder comprises a chuck pushing bush and a rotating rod. The oil cylinder comprises a cylinder body and a piston rod arranged in the cylinder body, and the chuck pushing bush is arranged at the stretching-out end of the piston rod, is fixed relative to the piston rod in the axial direction and can relatively rotate around the axis. The rotating rod is arranged in the piston rod, and is connected with the chuck pushing bush in the connecting mode that the rotating rod and the chuck pushing bush can rotate synchronous and move relatively in the axial direction. The flexible chuck is arranged at one end of the rotating rod. By means of the improved inner-pushing type clamping device, the problem of oil leakage caused by poor rotation sealing of the oil cylinder can be solved, so that the working stability of the clamping device is improved, and the service life is prolonged.

A concentric sleeve type five-layer coextrusion film blower handpiece comprises five sets of runner systems, wherein each set of runner system correspondingly guides one layer of fused material to flow, and comprises one layer of spiral runner at the upper part of the handpiece and a total feeding port at the lower part of the handpiece; four layers of distribution discs are arranged at the lower part of the handpiece, and consist of a bottom-layer distribution disc, a second-layer distribution disc, a third-layer distribution disc and a fourth-layer distribution disc; the tail end points of all forty horizontal arrangement branch runners in the five sets of runner systems are positioned on one circle of a third interface; the eccentric distances of the tail end points of the forty horizontal arrangement branch runners are all the same, and are more than those of vertical branch runners of the first set of runner system; the tail end points of eight horizontal arrangement branch runners in each set of runner system are evenly distributed in the peripheral direction; and the tail end points of two adjacent horizontal arrangement branch runners in one set of runner system are staggered from each other at a directional angle of 45 degrees. The handpiece can produce five-layer coextrusion plastic films with large breadths, and is small in size and convenient for processing.

The invention relates to a method and a device for quenching coke and recovering energy. The method at least comprises the following steps: (1) a water gas reaction temperature reducing process, that is, red coke pushed out from a coke oven generates chemical reaction with water vapor to generate water gas, and heat is absorbed through water gas reaction of generated water gas so that coke is cooled; and (2) a pressured water vaporization temperature reducing process, that is, coke cooled through water gas reaction is directly contacted with water in a closed container to generate vaporization of water so that coke is cooled and water vapor capable of being used as a gas-state heat source can be generated simultaneously. The water vaporization temperature reducing process is at least composed of a coke feeding process, a water vaporization temperature reducing tank closing process, a spray water vaporization process under condition of water volume control, a water vaporization temperature reducing tank decompression process and a coke discharging process. By utilizing the method and the device, heat can be recovered, pollution is not generated, investment is small, running cost is low, and coke quenching time is short. The invention provides the efficient and low-cost method and the device for quenching coke and recovering energy of coking industries.

The invention discloses a vertical air shaft double-door type explosion-proof system, which mainly consists of a gable wall body (2), door bodies (3), a buffer framework (4) and a flexible buffer wall (5), wherein the gable wall body and the buffer framework are respectively fixed on a wellhead steel reinforced concrete base (1); small holes are respectively and correspondingly formed in upper and lower cross beams arranged at the left and right sides of the buffer framework at fixed intervals; the flexible buffer wall consists of a plurality of string-shaped buffer units; the string-shaped buffer units are correspondingly fixed in the small holes formed in the upper and lower cross beams arranged at the left and right sides of the buffer framework; the door bodies (3) are respectively arranged on a short upright post of the buffer framework (4) through a door shaft hinge (6); and the two ends of the door bodies (3) are supported on the gable wall body. The vertical air shaft double-door type explosion-proof system has the advantages that the fast explosion release and automatic resetting can be realized; higher explosion-proof performance is realized; and the vertical air shaft double-door type explosion-proof system is applicable to new and old air shaft building.

The invention discloses intelligent forming complete equipment for a super-large-specification ceramic plate. The intelligent forming complete equipment comprises a material distributing device, a pressing machine and a brick taking device, wherein the pressing machine comprises a pressing machine body, a square cylinder, a stroke compensation mechanism, a movable beam, an upper die, a lower die core assembly, a die frame and a driving device for driving the die frame to ascend and descend; the square cylinder comprises a cylinder body, a square piston and a square sealing ring; the stroke compensation mechanism is arranged between the square piston and the movable beam, and the stroke compensation mechanism can change the distance between the movable beam and the square cylinder; and a movable beam oil cylinder is arranged between the movable beam and the pressing machine body. Correspondingly, the invention further discloses a forming process of the intelligent forming complete equipment for the super-large-specification ceramic plate. According to the intelligent forming complete equipment and the forming process, the forming of the large-specification ceramic plate is realized,the forming quality is good, the strength of the ceramic plate is high, and edge cutting treatment is not needed.

The invention provides a sleeping intervention device for improving sleep quality and method thereof, wherein sleeping intervention device for improving sleep quality comprises array bed, mechanical arm, brain wave detector, CPU and magnetic field stimulator arranged on the mechanical arm. The array bed comprises bed frame and a plurality of array element moved up and down by the control of the driving device; pressure detecting mechanism is arranged on the upper surface of each array element; the magnetic pad of the magnetic field stimulator is arranged on the free end of the mechanical arm; CUP is connected with Pressure detecting mechanism through information, connected with brain way detector through bi-directional information, respectively connected with mechanical arm, magnetic field stimulator and driving device. Compared to existing technology, sleeping intervention device for improving sleep quality of the invention has a much higher degree of automation; adverse effect on sleeping of the user caused by factors including working staff operation can be avoided. The device is excellent in using effect.

The invention relates to a stirring device of a livestock manure full-mixing type fermentation tank. The stirring device comprises a fermentation tank, a stirrer and a hydraulic motor component, wherein the fermentation tank is used for accommodating a livestock manure mixed medium; the stirrer is positioned in the fermentation tank; and the hydraulic motor component serving as a power source directly drives the stirrer to rotate. The stirring device has a compact structure, is convenient to install and operate, safe, reliable and high in corrosion resistance, and hardly triggers safety accidents such as a fire hazard, explosion, methane leakage and the like.

The invention discloses a hard rock push bench. The hard rock push bench comprises a cutter head, a crushing compartment and a housing, wherein the front end of the crushing compartment is connected with the back side of the cutter head, and the tail end of the crushing compartment is connected with the front end of the housing. The hard rock push bench is used for performing excavation work in a pebble bed, or a gravel bed, or continuous hard rock. No single bearing is arranged on a hob of the hard rock push bench, but a bearing inner ring is integrated onto a cutter shaft, a bearing outer ring is integrated onto a cutter body, and therefore structure of the hob is simplified, and production cost and manufacturing difficulty are reduced. .By regulating degrees of tightness between a hob seal ring and an annular gland through a gland regulation bolt, starting torque of the hob can be quickly regulated, and then the hob can adapt to different geological environments.

The invention provides a microwave output window and a manufacturing method thereof. The microwave output window comprises a first metal diaphragm, a second metal diaphragm, a first protection ring, and a second protection ring. The microwave output window enables microwaves in a dielectric window plate to be in the state of travelling waves, the field intensity in the dielectric window plate can be substantially reduced, the breakdown and damage to the dielectric window plate by high frequency is prevented, and higher power capacity than a common box-type window is obtained; the protection rings increase the surface area of a welding position of the dielectric window plate and a circular waveguide, the field intensity of the welding position is further reduced, and the breakdown and damage to the dielectric window plate by high frequency is avoided; the thickness of the dielectric window plate is small, the dielectric loss is low, and the loss power of the dielectric window plate is reduced; and the protection rings reduce the sealing difficulty of the dielectric window plate and improve the welding reliability between the dielectric window plate and the circular waveguide.

The invention discloses an explosion-proof battery, comprising a battery barrel, a battery unit housed in the battery barrel, a first cap component and a second cap component; the first cap component and the second cap component are used for sealing the battery barrel; the first cap component is electrically connected with the cathode of the battery unit; the second cap component electrically connected with the anode of the battery unit comprises a substrate which is hermetically connected with one end of the battery barrel, an explosion-proof device arranged on the substrate and a protective cover correspondingly arranged outside the explosion-proof device; wherein, an insulation layer is arranged between the first cap component and the battery barrel; the second cap component is directly connected with the battery barrel; the protective cover is fixed by the substrate. Since the insulation layer is arranged between the first cap component and the battery barrel, the second cap component is directly connected with the battery barrel and no insulation layer is required to be arranged between the second cap component and the battery barrel, and the second cap component and the battery barrel can be sealed without using any flanging, thus eliminating the restriction of the battery to the strength of a battery vessel, reducing the sole weight of the battery and sealing difficulties.

The invention relates to a moderate temperature straight all-glass vacuum heat collecting tube which comprises a glass outer tube (1), a glass inner tube (2), a first bellows expansion joint (3(A)), a second bellows expansion joint (3(B)), a first metal connecting tube (9(A)) and a second metal connecting tube (9(B)), wherein one end of the glass outer tube (1) is in sealing connection with one end of the first bellows expansion joint (3(A)) via a first transition connecting ring (6(A)); the other end of the glass outer tube (1) is in sealing connection with one end of the second bellows expansion joint (3(B)) via a second transition connecting ring (6(B)); the other ends of the bellows expansion joints are in sealing connection with the two ends of the glass inner tube (2) via transition connecting rings; and the first metal connecting tube (9(A)) and the second metal connecting tube (9(B)) are welded at outer side orifices of the first bellows expansion joint (3(A)) and the second bellows expansion joint (3(B)) respectively. The tube is lower in cost and sealing connection difficulty, and is applicable to solar moderate temperature heat utilization systems of industrial heating, heat energy refrigeration and the like.

The invention discloses a carbon dioxide imbibition diffusion oil discharge experimental device in a tight oil reservoir. The experimental device comprises a multi-stage rock core holder, a crude oilinjection device, a recovery device, an intermediate container, a high-pressure gas cylinder, an injection pump, a confining pressure pump, a back pressure pump, a collection device and a control system, a connecting hole is formed between the top and the bottom of the multi-stage rock core holder, an oil injection pipe is arranged between the connecting holes in the top and the bottom, and the crude oil injection device and the recovery device are connected to the top and the bottom of the oil injection pipe; a plurality of rows of small holes are formed in the side surface of the multi-stagerock core holder and serve as a gas inlet and a gas outlet; the gas inlet is connected to the intermediate container through a pipeline, the intermediate container is connected to the high-pressure gas cylinder and the injection pump, and the gas outlet is connected to the collecting device; the multi-stage rock core holder is also connected with a confining pressure pump; and heating layers arearranged on the inner walls of the multi-stage rock core holder and the intermediate container. Through further improvement of an existing experimental device, authenticity simulation of complex wellconditions can be effectively improved.

The invention discloses a close cell with explosion-resistant function, which includes a cell cylinder, a cell unit contained in the cell cylinder, end cap elements for sealing two ends of the cell cylinder. The end cap elements are respectively connected with anode and cathode of the cell unit, the end cap element of one end is equipped with a explosion-resistant device, wherein the end cap element equipped with the explosion-resistant device is directly connected with the cell cylinder, a insulated layer is arranged between the end cap element of the other end and the cell cylinder. Because the insulated layer is arranged between the end cap element without explosion-resistant structure and the cell cylinder, the end cap element with the explosion-resistant structure can be directly connected width the cell cylinder, so that, a insulated layer is not needed to arrange between the end cap element with the explosion-resistant structure and the cell cylinder, structure of the end cap element is simplified, limitation of cell cylinder intensity is resolved, aluminum alloy cylinder with small intensity can also employ the structure, sealing difficulty and weight of cell is greatly reduced.

The invention discloses an offshore wind power and vertical axis type tidal current energy combined power generation device. The offshore wind power and vertical axis type tidal current energy combined power generation device mainly comprises an offshore wind power generation subsystem, a tidal current energy power generation subsystem, a supporting foundation system, an electric energy conveyingsystem and a control system; the offshore wind power generation subsystem adopts a common horizontal axis type, and a generator is a permanent magnet direct current generator; the tidal current energypower generation subsystem adopts a vertical axis type which develops rapidly in recent years; the supporting foundation system is a single-pile type foundation, the wind power generation subsystem and the tidal current energy power generation subsystem share one supporting foundation pile, and the bottom of the supporting pile extends into the seabed to be fixed; the control system plays a rolein real-time communication and controlling the working states of all the subsystems; and the electric energy conveying system transmits electricity generated by the offshore wind power generator and atidal current generator to a power grid. The offshore wind power and vertical axis type tidal current energy combined power generation device has the advantages that clean and efficient marine resources can be fully excavated, the utilization rate of the marine resources can be increased, the power generation rate of the device can be increased, the construction cost and the maintenance cost canbe lowered, the service life can be prolonged, and the economic benefits of offshore wind power plants can be increased.

The invention discloses a full circle swinging propeller hydraulic distance-adjusting mechanism. The back end of a piston rod of a hydraulic oil cylinder is coaxially and fixedly connected with the front end of a push-pull rod in series, and the push-pull rod coaxially penetrates through a central through hole of a transmission shaft. The back end of the transmission shaft is matched with a flange hub through a taper, the flange hub is fixedly connected with a propeller hub, and a middle segment of the transmission shaft is fixedly sleeved with a big bevel gear in coaxial mode. The big bevel gear is mutually meshed with a small bevel gear. The push-pull rod is of a ladder shaft structure, and the big end of a ladder shaft is positioned between two thrust self-aligning bearings which are coaxial, and is fixedly matched with inner rings of the two thrust self-aligning bearings. Guide motion blocks are sleeved on the push-pull rod in clearance mode, and simultaneously and fixedly in sleeved connection with outer rings of the two thrust self-aligning bearings, and rotating of the guide motion blocks does not affect the push-pull rod. When the hydraulic oil cylinder does not rotate, stress of the transmission shaft is balanced, and reliability, stability and maintenanceability are improved, promoting efficiency is improved, and sealing difficulty of a hydraulic oil path is reduced.

The invention discloses a self-control hydraulic cutting head with water-saving and efficiency-enhancing capabilities, which includes a cutting head body, the external contour surface of the cutting head is used for placing welding self-control hydraulic picks and ordinary picks, and the right side is equipped with The connecting flange is connected with the drive shaft through a coupling; the self-controlling hydraulic pick has a nozzle at the tooth tip, a central water channel in the middle of the tooth body, and a radial flow channel and an annular groove near the tail end. The invention can realize the self-regulation of the high-pressure water flow rate of the self-controlled hydraulic pick installed on the cutting head. During the excavation operation, the self-controlled hydraulic pick that cuts with the rock is in the high-pressure water open state to increase the rock-breaking efficiency and reduce the The pick is worn to improve the dust removal effect; the self-controlled hydraulic pick is switched to low-pressure water in the no-load state without contact with the rock, reducing the water flow and saving water resources.

The invention provides an array bed which comprises a plurality of independent array units which are horizontally arranged inside a bed body frame and controlled by a driving device to move up and down. The upper surface of each array unit is provided with an air bag made of inflexible materials. Each air bag is provided with a gas pressure sensor for being in information connection with a central processor. According to the array bed, the upper surface of each array unit is provided with the air bag made of inflexible materials, and the gas pressure sensor for being in information connection with the central processor is arranged inside each air bag; due to the fact that the air bags are small and are made of inflexible materials, large gas pressure changes can be generated inside the air bags even when small pressure is applied to the air bags, the measuring sensitivity is greatly improved, and meanwhile due to the fact that the air bags are soft, and the human body will feel comfortable when making contact with the air bags. According to the array bed, the pressure of each portion of the body can be sensed flexibly, meanwhile, the purpose of comfortable level is achieved, the structure is simple, and use is convenient.

The invention belongs to the technical field of technical gas turbines, and particularly relates to a sealing structure for a bearing cavity of a turbine rotor of a core engine, which is used for replacing a low-pressure turbine rotor to be connected with the core engine and comprises a sealing shaft barrel and an oil cavity sealing bushing, the sealing shaft barrel comprises a rear shaft section, a mounting disc part and a front shaft section; the rear shaft section, the mounting disc part and the front shaft section are arranged in the direction of the core machine from back to front; the front shaft section can extend into the long labyrinth ring, so that labyrinth seal is formed by the long labyrinth ring and the high-pressure turbine shaft; the front abutting face of the mounting disc part can abut against the end face of the rear side of the bearing oil injection ring, so that the third oil cavity is closed. And a second oil cavity is formed among the oil cavity sealing bushing, the turbine fulcrum frame and the sealing shaft barrel. According to the scheme, the sealing structure can be matched with the structure of the core machine and has the advantages of being simple in structure, good in manufacturability and low in cost; and a sealing mode of combining different seals is adopted, so that the sealing difficulty is reduced, and the change of an original structure is reduced.

An implanted self-suspended axial flow blood pump, comprising a stator and a rotor; the stator comprises a stator iron core (2), a stator coil (3) and a motor bracket (4); the rotor comprises a magnetic steel (5) comprising magnetic material and built-in blades (8); the built-in blades (8), the magnetic steel (5), the motor bracket (4), the stator coil (3) and the stator iron core (2) are sequentially disposed in a radial direction from inward to outward in the cross section of the blood pump; the stator and the rotor are connected without bearings; the rotor is in a self-suspended state when rotating; in the structure of the blood pump, the built-in blades (8) are disposed in the front, and the blades (9) to be externally disposed are arranged in the rear, and the tangent plane of the blades take the form of the tangent plane of awing-shaped blade of a marine duct propeller, such that blood is ensured to smoothly bifurcate and flow in main and branch vessels.

The invention provides a novel suspended counterweight reservoir sediment dry bulk density sampling system which comprises a sampler, a support frame and an additional counterweight. The support frameand the additional counterweight are fixed on the sampler. The sampler is composed of a driving cylinder, a sampling cylinder and a drill bit which are connected in sequence; and the upper and lowerparts of the driving cylinder are sealed. The driving cylinder includes a cylinder body, a control system, a storage battery, a chain hammer drilling system, wherein the control system, the storage battery, and the chain hammer drilling system are arranged in the cylinder body. A sealing device and triggering mechanism for triggering the sealing device to act are arranged in the drill bit. The control system of the driving cylinder includes a liquid level sensor and a programmable logic controller; the programmable logic controller controls the hammering drilling system to act according to thedepth change sensed by the liquid level sensor so as to drive the sampler to drill. According to the invention, no deepwater cable needs to be put down; the storage battery is loaded in the sampler to serve as a power supply, so that cables are reduced; the liquid level sensor and the programmable logic controller are added to control turning on of the motor jointly; and since the sampler is sealed by using a deflection piece type sealing mode, the disturbance to the sample entering the sampling cylinder in the sampling process is low and the sampling precision is high.

The present invention is applicable to the technical field of three-dimensional printing, and provides a sealing device, a three-dimensional printer equipped with the sealing device and a printing method thereof. The sealing device is applied to a three-dimensional printer, and the three-dimensional printer includes a printing head for printing parts , the sealing device includes a base installed in the part processing area, a flexible sealing cover set on the base and forming a closed cavity with the base, and a workbench for carrying parts to be processed. The printing head is inserted into the flexible sealing cover to seal with the flexible The cover is sealed and connected, and the base is provided with an air inlet passage for filling the airtight cavity with protective gas and an air outlet passage for discharging the protective gas. The three-dimensional printer provided by the present invention adopts a flexible airtight cavity, which can better adapt to the movement of the axis in the printing process; at the same time, it adopts a modular design, and the flexible airtight cavity device and the printer body are relatively independent, and can also be applied to other similar functions occasions.

The invention discloses an electric pile sealing device and a method for sealing an electric pile. The electric pile sealing device comprises a sealing box and a gas pipe, wherein the sealing box comprises a lower box body and an upper box body; the gas pipe penetrates through the lower box body, one end of the gas pipe is exposed to the outer side of the lower box body, and the other end of the gas pipe is sealed in an inner cavity of the lower box body. A base for placing the electric pile is arranged on the bottom of the inner cavity of the lower box body, and through holes through which the gas pipe penetrates are formed in the positions, corresponding to the gas pipe, of the lower box body and the base respectively. Positive and negative terminals are arranged on the lateral side of the lower box body; a cushion block is arranged on the top of an inner cavity of the upper box body, and a limiting groove for fixing the cushion block is formed in the position, corresponding to the cushion block, of the upper box body. According to the technical scheme, the electric pile is placed in a sealing box, so that the sealing problem is transferred to the relatively simple interior of the sealing box from the complicated interior of the electric pile; moreover, the way of reducing the dropout voltage is adopted, the sealing difficulty is reduced, the electric pile sealing effect is improved, the performance and the power generation efficiency of the electric pile are improved, and the service life of the electric pile is effectively prolonged.

The invention discloses a working electrode for achieving electrochemical testing in high-temperature and high-pressure water, which is characterized in that during testing, a to-be-tested sample is placed in a high-temperature and high-pressure kettle, and one end of an electrode lead is connected with the to-be-tested sample; the other end of the electrode lead sequentially penetrates through the body, the sealing sleeve, the conical sealing ring I, the clamping ring, the conical sealing ring II and the upper end cap and then is connected with an electrochemical workstation located outside the high-temperature and high-pressure container;the sealing of the electrode wire is rachieving by screwing down the compression nut to extrude the biconical sealing ring; the cooling device is further arranged outside the body, so that the electrode lead and the sealing piece are sealed at a low temperature, the sealing difficulty is greatly reduced, and the sealing reliability is improved. The electrode is easy to manufacture, high in reliability, good in sealing performance, convenient to install and capable of achieving electrochemical testing of metal materials in a high-temperature and high-pressure water system with the temperature ranging from the room temperature to 350 DEG C and the pressure ranging from the normal pressure to 22 MPa.