33results about How to "Uniform expansion" patented technology

The invention discloses an air bag type polishing device which comprises a power mechanism, an air cavity mechanism, an air bag type polishing mechanism, a feeding mechanism and a transition plate, the air cavity mechanism and the feeding mechanism are both arranged on the transition plate, and an output shaft of the power mechanism is in linkage with the air bag type polishing mechanism through the air cavity mechanism. The air cavity mechanism supplies compressed air to the air bag type polishing mechanism, and the feeding mechanism can drive the transition plate to move. Uniform air supply is achieved through the air cavity mechanism, uniform expansion of the air bag type polishing mechanism is ensured, the contact pressure between a polishing layer and a to-be-polished surface is kept constant, local abrasion is reduced, and polishing consistency and efficiency are improved.

The invention relates to a stirring type particle circulation coupling reactor, a fluidized bed and a particle circulation coupling method, the fluidized bed comprises a reactor, a solid recovery device and a storage tank, a stirring structure is introduced into the reactor, and horizontal shearing force generated by stirring is used for crushing large-size particle agglomerates to prevent hardening of micro-nano particles; meanwhile, the circular flow of the gas medium provides a vertical acting force for the particles, and the coalescence behavior of the gas phase and the solid phase in the reactor is reduced, so that the problem that the micro-nano particles are blocked in the annular space area of the reactor is solved, the fluidization quality is improved, and the circular continuous treatment of the micro-nano particles is realized; the fluidized bed utilizes the built-in guide cylinder to realize circulation, and the circulation direction can be a central airlift type or a central descending type by adjusting the gas flow rate ratio of the guide cylinder to the annular gap area, so that the circulation flow of particles is enhanced, and the fluidization quality of the particles at the bottom of the circulation section is improved.

The high-strength three-way welding connection structure for the hydrogen conveying pipeline belongs to the field of three-way welding and comprises a base, two sliding grooves are formed in the upper surface of the base, first motors are fixed to the left side and the right side of the base correspondingly, and output shafts of the first motors penetrate into the sliding grooves and are fixedly connected with first screw rods; vertical frames are in threaded connection with the outer surfaces of the first screws, second motors are fixed to the opposite sides of the two vertical frames, and the opposite ends of output shafts of the two second motors penetrate to the opposite sides of the two vertical frames correspondingly. Supporting is provided from the inner wall of the three-way pipe through the supporting rollers, the transverse pipe positioning mechanism applies clamping force from the outer wall through the clamping blocks, a double-positioning structure of inner supporting and outer clamping is formed, it is ensured that three ports of the three-way pipe are strictly coaxial, and welding deflection is avoided; the clamping force can be automatically adjusted according to the small difference of the pipe diameters of the three-way pipes, the three-way pipes of different specifications can be rapidly matched through linear driving of the sliding frame and the air cylinder, and the universality is remarkably improved.

The utility model discloses a rescue air cushion convenient to carry, including box, air bag pad and movable board, the inside of box is provided with the cavity, and the one side of box is provided with the notched of being linked with the cavity, and the upper and lower both ends of notched inboard all are through the pivot respectively installed with roll axle no.

The utility model discloses a type II expanding agent metering and proportioning device which comprises a metering and proportioning barrel, an upper positioning seat is fixedly arranged at the bottom of the metering and proportioning barrel, a lower positioning seat covers the bottom of the upper positioning seat, and meanwhile, a lower barrel body is fixedly mounted at the bottom of the lower positioning seat; a metering and proportioning assembly is fixedly arranged on the circumferential side wall of the metering and proportioning cylinder and comprises a mounting seat fixedly arranged on the circumferential side wall of the metering and proportioning cylinder. According to the type II expanding agent metering and proportioning device, the weight of a liquid expanding agent in the metering and proportioning barrel is divided into three grades, and the weight ratio of the three grades in the metering and proportioning barrel is calibrated through three groups of sealing elements mounted on the outer side of a mounting seat; the time can be greatly saved; originally, the expanding agent needs to be weighed in several minutes before each disc of concrete is stirred, but now, the pre-quantified expanding agent can be directly used, so that the stirring period is shortened, and more prefabricated parts can be produced in unit time.

The invention provides a method for preparing a ceramsite fracturing propping agent with a SiO2-Al2O3 mullite phase at a low temperature and a product. The method comprises the following steps: putting a mixture of SiO2, Al2O3 and an instantaneous sintering aid into a low-temperature sintering device; a pressure relief opening of the pressure shaft is in a closed state, the pressure shaft is used for conducting first pressurization treatment on the sintering chamber, the air pressure in the sintering chamber is controlled to be higher than the air pressure outside the sintering chamber, and a first pressurization treatment product is obtained; the pressure relief opening is in an open state, the air pressure inside the sintering chamber and the air pressure outside the sintering chamber are adjusted to be kept consistent, second pressurization treatment is conducted, and the mullite phase fracturing propping agent which is excellent in mechanical property, low in breakage rate, stable in physical and chemical property and resistant to chemical corrosion is obtained. The preparation method has the advantages of simplicity in synthesis, easiness in implementation, low sintering temperature and energy conservation, is beneficial to popularization in the field of industrial fracturing of petroleum and natural gas, and has a wide application prospect.

The present application relates to a kind of high elastic shaping underwear functional fabric production equipment and its production method, the technical field belongs to textile machinery technology, the technical problem to be solved is that conventional equipment is sprayed high elastic shaping underwear functional fabric, fabric is easily displaced, coating is uneven, including setting clamping component and tension component linkage, utilize mounting bracket and press wheel clamping fabric edge, support box expands fabric, ensure stable spraying, detection component scans and detects fabric flaw, winding frame synchronously winds fabric, the present application is prepared by equipment, installs spool etc. Step, utilize specific configuration to realize fabric stable expansion, uniform spraying, accurate flaw finding and automatic winding, guarantee fabric performance and quality, improve production automation degree.

The utility model relates to a kind of bush type air expansion shaft, comprising: always fill air expansion shaft;Bushing expansion piece is set in the large diameter end of the always fill air expansion shaft, and its outer ring is polygonal structure;And reel is set in the outside of the bushing expansion piece and is lifted inner wall by the edge of the polygonal structure when the bushing expansion piece tightens.Compared with prior art, the utility model has the advantages of preventing reel slip, improving winding stability, improving product yield, etc.

The present invention discloses a foamed thermal insulation ceramic plate, which relates to the field of ceramic thermal insulation plates, including a plate body, a heat-conducting net is pre-buried inside the plate body, the heat-conducting net is arranged close to the heating surface of the plate body, and when the plate body is heated, the heat-conducting net can transfer heat inside the plate body, and the heat-conducting net is arranged in two layers inside the plate body, one of which is close to one side of the plate body, and the other is close to the other side of the plate body; a connecting net is fixedly connected to the two heat-conducting nets respectively, and is located in the middle of the plate body. When the foamed thermal insulation ceramic plate is formed, the present invention puts the heat-conducting net in the poured slurry, and when the foamed thermal insulation ceramic plate is heated, the heating surface can transfer heat to the heat-conducting net, and the heat-conducting net can realize heat transfer inside the foamed thermal insulation ceramic plate, improve the heat transfer efficiency inside the foamed thermal insulation ceramic plate, and ensure that the foamed thermal insulation ceramic plate expands more evenly when heated, reducing cracking and bursting.

The invention provides a degradable zinc alloy intravascular stent which is of a tubular net structure and comprises a plurality of supporting rings (3) arranged in the axial direction and connecting rods (1) connected with the adjacent supporting rings (3). The supporting ring (3) is in a wave shape and is composed of a plurality of supporting rod units which are connected in sequence, each supporting rod unit comprises a first supporting rod in the middle and two arc-shaped parts connected to the two ends of the first supporting rod respectively, and wave crests or wave troughs of the supporting ring (3) are formed at the tops of the arc-shaped parts; every two adjacent supporting rod units are connected by sharing one arc-shaped part; the rod diameter (42) of the middle position (2) of the first supporting rod is W1, and the rod diameter of the first supporting rod is gradually increased from the middle position (2) of the first supporting rod to the arc-shaped parts at the two ends of the first supporting rod. The rod diameter (41) of the supporting ring (3) at the wave crest and the wave trough is W2, and W2 is larger than W1. The rod diameter (32) of the connecting rod (1) is W3, and W3 is smaller than W1.

The invention belongs to the technical field of foam forming, and particularly relates to a foam forming process of a pressure-resistant waterproof foam box. The preparation method comprises the following steps: S1, adding foaming raw material components except a foaming agent into mixing equipment, and uniformly stirring and mixing at 60-70 DEG C to obtain a mixture A; s2, adding a foaming agent into the mixture A, and uniformly mixing to obtain a mixture B; s3, the mixture B is injected into a preheated forming mold cavity; after the pressure is maintained for a period of time, the wall thickness of the mold cavity is increased by retreating the movable mold core, in the process, the volume of the material is expanded along with the increase of the space of the mold cavity, foaming is completed, and the whole mold cavity is filled; and S4, cooling and curing the material, and taking out to obtain the foam box. The graphene modified EPS particles are adopted as the main raw material, and a demolding controllable foaming forming process is combined, so that the mechanical strength and the waterproof performance of the material are remarkably improved, and the heat preservation and heat insulation performance of the material is effectively improved.

The invention discloses a herbal pill processing device for traditional Chinese medicine processing, and particularly relates to the technical field of herbal medicine processing.The herbal pill processing device comprises a first base, a collecting mechanism is fixed to the upper end of the first base, a second base is fixed to the outer side of the collecting mechanism, a motor is inversely installed on the rear side of the top of the second base, and a gear is installed at the load end of the motor; and a balling part is installed in the middle of the top end of the second base, an extrusion mechanism is installed at the top of the balling part, and a hydraulic cylinder is installed at the top of the outer frame. According to the traditional Chinese medicine pill processing device for traditional Chinese medicine processing, the air bag is used as a main extrusion structure, after the air pressure of an inner cavity of the air bag is increased, the air bag can be evenly expanded towards the outer side, and raw materials are evenly extruded towards the outer side from inner cavities of the multiple extrusion holes; and then the pills are matched with the cutting and conveying spiral strip to scrape off the pills in time, so that the size of each pill can be basically the same, and the working efficiency is improved.

The invention discloses a controllable thermal expansion preparation method of a graphene oxide layer. The controllable thermal expansion preparation method comprises the following steps: S1, preparing a modified graphene oxide precursor; s2, preparing a graphene oxide layer preform; s3, gradient heating controllable thermal expansion treatment is carried out; s4, post-treatment shaping is carried out; graphene oxide is modified through an amino silane coupling agent, amino functional groups are introduced, the interlayer acting force of graphene oxide is regulated and controlled, a precursor foundation is provided for subsequent controllable thermal expansion, and the problem that thermal expansion is uncontrollable due to the fact that the interlayer acting force of a traditional precursor is unstable is effectively solved; a gradient heating thermal expansion process is adopted, the heating rate and the constant temperature time are controlled in three stages, moisture removal, functional group decomposition and deep expansion are carried out in order, local excessive expansion or insufficient expansion caused by a single heating rate is avoided, and it is ensured that the graphene oxide layer expands uniformly and the pore structure is controllable.

The utility model discloses a numerical control machining tool magazine with a quick tool changing mechanism, and relates to the technical field of machining. Comprising a shell and further comprises clamping assemblies, the outer walls of the clamping assemblies and the outer wall of the shell are fixedly installed, the clamping assemblies are arranged in an annular array mode along the central axis of the shell, the outer walls of the clamping assemblies are fixedly connected with installation assemblies, and the installation assemblies are arranged in an annular array mode along the central axis of the shell; according to the tool magazine, the clamping assembly is arranged, a unique pneumatic structure is applied, and by means of the air inlet header pipe, the air inlet ring pipe, the air inlet branch pipes, the mounting pipe and the air distributing pipe, air can be rapidly inflated into the fixed bag and the circular bag, so that a tool can be firmly clamped within a short time, and the tool changing efficiency is improved; the waiting time in the machining process is shortened, and the purpose of the numerical control machining tool magazine with the quick tool changing mechanism is achieved.

The utility model relates to a kind of artificial valve, the artificial valve includes valve frame, valve leaflet;The valve leaflet is arranged in the valve frame;The valve frame includes multiple double-grid structures, the double-grid structure includes first grid unit and second grid unit being adjacent in the circumferential direction or axial direction of the valve frame;Wherein one double-grid structure and adjacent another double-grid structure circumferential dislocation, axial interface.It is prevented that the valve frame is expanded in axial and / or circumferential direction instantaneously by the above-mentioned setting when the valve frame is inflated and expanded by balloon, so that the double-grid structure is mutually restrained in the axial and / or circumferential direction of the valve frame, to avoid the distortion of the strut of the valve frame when balloon inflation and expansion reach initial critical pressure.

The utility model relates to fireproof glass technical field, and disclose a kind of fireproof glass partition with sound insulation and heat insulation function, this fireproof glass partition with sound insulation and heat insulation function, including upper steel main keel, the outside of upper steel main keel is provided with lower steel main keel, the outside of upper steel main keel is provided with fireproof glass, the outside of lower steel main keel is equipped with steel adjustable base, the outside of upper steel main keel is provided with steel glass gland, the outside of upper steel main keel is provided with adjusting mechanism.This fireproof glass partition with sound insulation and heat insulation function, fireproof glass is placed to the middle of two fireproof outer rubber strip, the edge of fireproof glass is sealed, and steel glass gland is better fixed fireproof glass by adjusting screw, different thickness fireproof glass is fixed, and screw is fixed lower steel main keel, upper steel main keel, guarantee the stability of overall keel frame.

The invention belongs to the technical field of interventional medical instruments, and particularly relates to a valve frame for a pulmonary valve and the pulmonary valve. The valve frame comprises a tubular middle body, a near-end body and a far-end body, the near-end body and the far-end body are connected to the two axial ends of the middle body respectively, the middle body comprises a plurality of grid structures, the far-end body comprises a plurality of M-shaped unit bodies, the number of the unit bodies is m, and m is a natural number larger than or equal to 2. The pulmonary artery valve comprises a valve leaflet and the valve frame, and the valve leaflet is connected to the valve frame. The valve frame can be evenly expanded, and the overall shape consistency is good. By adopting the valve frame, the pulmonary artery valve can be uniformly expanded, the use requirement on uniform expansion of the pulmonary artery valve is well met, and the use reliability is good.

The present invention discloses a device and method for cold expansion of crack-stopping holes in metal structures. The hole expansion device is composed of a core rod, a bushing, an outer cylinder, a nose cover, a sealing cover, a buffer, a hydraulic press, a top cover and a bottom cover. The bushing is placed in the hole, and the thrust generated by the hydraulic press is used to pull the core rod back, thereby cold expanding the crack-stopping hole on the metal structure to obtain a cold-expanded hole. The cold-expanded hole made by the present invention can effectively prevent the expansion of cracks in the metal structure, and the construction is convenient, the process is simple, safe and reliable, the equipment has low power, and it saves materials and energy. The use of the bushing can prevent damage to the crack-stopping hole, and it is suitable for crack arrest of metal structure cracks with holes of various thicknesses and diameters. The core rod can be replaced for use with crack-stopping holes of different sizes or different expansion rates. It has high flexibility, good quality and excellent performance.

The utility model relates to spring processing technical field, concretely relates to a spring processing is with the spring winding device of convenient adjustment, including connecting plate, display panel and support leg, the outside fixed connection of connecting plate has drive motor, the upper movable joint of connecting plate has movable axle, the upper movable joint of connecting plate has the drum shell, the below fixed connection of connecting plate has storage box, the upper fixed connection of connecting plate has movable frame, make the connecting gasbag inflation through starting the delivery pump, the restriction of connecting gasbag through pulling spring, carry out even inflation, adjust the size of drum shell, insert the steel wire into movable shell, through starting drive motor, wind the steel wire in the drum shell outside, through starting movable hydraulic rod, carry out the direction of steel wire, after spring winding is completed, through rotating and dismantling bolt and movable bolt, dismantle the drum shell of one side, move left to spring, dismantle spring.

This invention relates to the field of steel plate welding technology, specifically to a steel plate butt welding device, including a base and a processing table, as well as a welding mechanism, a heating mechanism, a beveling mechanism, and a splicing mechanism. The splicing mechanism includes a drive assembly, two feeding plates, and two clamping assemblies. The beveling mechanism includes a bidirectional electric push rod, a position adjustment assembly, two grinding discs, and two swinging assemblies. A support column is fixedly provided on the top of the base. The heating mechanism includes a telescopic assembly, a first sliding assembly, and four electric heating plates. The welding mechanism includes a welding torch, a second sliding assembly, and two traction assemblies. This steel plate butt welding device of the present invention prevents visual errors caused by manual beveling based solely on experience, improves the adjustment accuracy of the grinding disc tilt angle, further improves the beveling accuracy, ensures the uniformity of the beveling of the two steel plates, and prevents problems such as incomplete penetration, welding deformation, and undercut, thereby improving the butt welding effect of the two steel plates.

The utility model discloses a furniture plate connecting piece which comprises a middle clamping plate and a connecting piece body, a containing hole used for containing the connecting piece body is formed in the middle clamping plate, the two sides of the middle clamping plate are further coated with first adhesive layers, a bottom plate is arranged at the bottom of the middle clamping plate, and the upper end face of the bottom plate is coated with a second adhesive layer. The connecting pieces are installed in connecting holes in the connecting ends of the furniture plates, the connecting pieces comprise a plurality of first connecting pieces and a plurality of second connecting pieces, the first connecting pieces and the second connecting pieces are arranged in a staggered mode, the connecting stability can be guaranteed, each first connecting piece comprises an expansion nail and an expansion pipe, and each second connecting piece comprises a connecting column. Through the two connecting pieces, the middle clamping plate and the bottom plate which are integrally formed, the bearing capacity of the joint of the furniture plate is improved.

The utility model provides a kind of for air spring inner bag's forming die, including upper die assembly, middle die assembly and lower die assembly, middle die assembly is located between upper die assembly and lower die assembly, the inner wall of upper die assembly is provided with upper inner die, the inner wall of middle die assembly is provided with lower inner die, upper inner die and lower inner die combination form mould cavity, mould core is provided in mould cavity, and the inner wall between mould cavity and mould core forms the cavity of vulcanization air spring inner bag;Injection channel is arranged in upper die assembly, one end of injection channel is connected with cavity, and the other end of injection channel is connected with the outside of forming die.Air spring inner bag in vulcanization process, mould core supports air spring inner bag, since mould core cannot be deformed, as long as the distance between the inner wall of mould cavity and mould core is certain, then the thickness of air spring inner bag after forming is also certain, so that air spring inner bag is uniformly expanded when making air spring skin bag.

The utility model relates to the technical field of cloth shaping and drying mechanisms, in particular to a screen cloth shaping and drying mechanism, which starts a conveying mechanism to convey screen cloth, ensures that the screen cloth does not deviate or accumulate in the drying process, improves the screen cloth shaping and drying efficiency, and starts a cleaning mechanism to clean the screen cloth. The method comprises the following steps: removing impurities such as dust and greasy dirt accumulated in the production or storage process of the screen cloth, ensuring the cleanliness of the screen cloth, starting a flattening mechanism to flatten the two sides of the screen cloth, ensuring that the two sides of the screen cloth are flat, avoiding the phenomena such as hemming and wrinkling in the use process, and starting a heating mechanism to heat air, so that the temperature of the air is increased. The drying mechanism is started to evenly heat the screen cloth, it is guaranteed that fibers and structures of the screen cloth evenly expand and contract in the heating process, and the drying and shaping efficiency of the screen cloth is improved; comprising a fixing mechanism; the device further comprises a conveying mechanism, a cleaning mechanism, two flattening mechanisms, a heating mechanism and a drying mechanism.

The embodiment of the utility model provides a packaging structure of a semiconductor device and the semiconductor device. The packaging structure comprises a substrate; the electrode layer is located on one side of the substrate, the electrode layer comprises a plurality of annular electrode structures, the annular electrode structures are arranged in a concentric circle mode, and the annular electrode structures are mutually insulated; the heat dissipation layer is located between the electrode layer and the substrate, the heat dissipation layer comprises a plurality of annular conductive structures, and the orthographic projection, facing the substrate, of the annular conductive structures is at least partially overlapped with the orthographic projection, facing the substrate, of the annular electrode structure; and the annular conductive structure is electrically connected with the annular electrode structure. According to the invention, each part of the heat dissipation layer can be uniformly expanded in a high-temperature environment, and local high-strength wear of the substrate is avoided, so that the failure risk of the semiconductor device can be reduced, the safety, reliability and stability of the semiconductor device are improved, and the service life of the semiconductor device is prolonged.

The invention provides a double-coating-layer modified silicon-based negative electrode material and a preparation method thereof, a negative electrode and a lithium ion battery. The double-coating-layer modified silicon-based negative electrode material comprises a porous silicon core, a carbon coating layer and a lithiated vulcanized polyacrylonitrile coating layer, pores of the porous silicon core are filled with the carbon coating layer, the outer surface of the porous silicon core is coated with the carbon coating layer, and the surface of the carbon coating layer is coated with the lithiated vulcanized polyacrylonitrile coating layer. The lithiated sulfurized polyacrylonitrile coating layer can promote uniform lithiation of the porous silicon core in the charging process while inhibiting volume expansion of the porous silicon core in the charging process. Besides, the carbon coating layer and the lithiated sulfurized polyacrylonitrile coating layer can synergistically prevent the porous silicon core from being in contact with an electrolyte, so that continuous consumption of lithium ions is avoided, coulombic efficiency is improved, and the technical problems of huge volume expansion of the silicon-based negative electrode in the charge-discharge cycle process and serious side reaction with the electrolyte are solved.

This invention discloses a plastic bottle blow molding system and method, relating to the field of plastic packaging molding technology. The system includes a zoned precision preheating mechanism, a multi-stage air-blowing stretch blow molding mechanism, an internal and external composite cooling mechanism, and a PLC control mechanism, arranged sequentially along the preform processing direction. The method includes preform conveying, zoned precision preheating, multi-stage air-blowing stretch blow molding, internal and external composite cooling, and demolding. This invention improves the preform temperature control accuracy to within ±1℃ and reduces wall thickness deviation to within ±0.05mm through independent cooling at the bottle mouth, 5-segment axial zone heating, and PID closed-loop temperature control. The precise synchronous coordination of three independent air paths with the stretch rod movement solves molding defects such as wrinkles and pitting. Synchronous cooling through a double-spiral reverse cooling channel outside the mold and a through-type cooling channel inside the stretch rod shortens the molding cycle from 3-4 seconds to 2-2.5 seconds.

This invention relates to a device and method for testing the airtightness of airbags in air-shield dams, belonging to the field of airtightness testing technology. It includes a main body, an airbag disposed between clamping plates, an injection pipe on one side of the main body, an air outlet on one side of the airbag, a locking assembly between the injection pipe and the air outlet, a stirring assembly inside the injection pipe, and a clamping assembly on one side of the lead screw. This invention achieves automatic opening of the air passage during docking and bidirectional automatic sealing during separation through plug-in self-sealing, preventing gas leakage and blocking impurities such as water vapor and dust from entering the air passage and the airbag interior. Combined with a mechanical locking structure using inclined plane transmission, it can resist the impact of inflation pressure and the tensile force generated by airbag deformation, ensuring that the interface remains secure and does not detach throughout the process. This eliminates external leakage not caused by the airbag itself, ensuring that the test results accurately reflect the airbag's sealing state and significantly reducing the probability of misjudgment.

The present invention relates to the field of transformer testing technology, a transformer oil static pressure test device, including a shell, a cone bucket is provided at the bottom of the inner cavity of the shell, an oil drain pipe extending to the outside of the bottom of the shell is provided at the central bottom end of the cone bucket, a vertical guide plate is provided above the cone bucket, the outer end of the guide plate is fixedly connected to the inner wall of the shell, a horizontal lifting plate is movably sleeved on the guide plate, the outer periphery of the lifting plate is fitted with the inner wall of the shell, an airbag is connected to the lifting plate, the bottom end of the airbag is fixedly connected to the top of the lifting plate, the top of the airbag is connected to the air supply pipe located outside the shell, the volume of the airbag can swell after high-pressure gas is injected into the airbag, forming a downward driving structure of the lifting plate, and the downward lifting plate forms a pressure structure for the transformer oil in the inner cavity to be output along the oil drain pipe. The present invention is conducive to solving the problems that the airbag structure is simple in some existing transformer oil static pressure devices, the expansion and deformation after gas filling is uncontrollable, and the oil drain hole is easily blocked in advance, resulting in work failure.

The invention relates to an electrode assembly, a battery monomer, a battery and a power utilization device, the electrode assembly comprises pole pieces and diaphragms, each diaphragm comprises a main body section, and the pole pieces and the main body sections of the diaphragms are stacked and wound to form an electrode main body; at least one axial end of the electrode main body is provided with a tab protruding out of the main body section; the at least one layer of diaphragm comprises a first extension section connected with the main body section, and the first extension section is wound outside the electrode main body for at least one circle; the first extension section is provided with a convex part protruding out of the main body section along the axial end part, and at least part of the convex part is folded towards one side close to the center of the electrode main body so as to cover the edge part of the tab at the corresponding end. The first extension sections are wound at all positions of the electrode main body in the axial direction, so that the radiuses or diameters of all parts of the electrode assembly can be ensured to be the same, all parts of the electrode assembly are uniformly expanded when the electrode assembly is expanded, the outer ring pole piece is not easy to break, and the use performance of the battery monomer is ensured.