60results about How to "Large stretch" patented technology

A single-sidedly or double-sidedly pressure-sensitively adhesive, elastic adhesive sheet comprising at least one layer of a pressure-sensitive adhesive, and having a maximum stretchability of more than 200% and a recovery of more than 60% after stretching to ⅔ of its maximum elongation, said pressure-sensitive adhesive (PSA) being based on a chemically crosslinked polyurethane, wherein the starting materials for the chemically crosslinked polyurethane include at least one isocyanate-reactive substance having a functionality of more than 2.0, in an amount of at least 5% by weight, based on the weight of the polyurethane composition, where the molecular weight of at least one of the starting materials used to form the polyurethane is being greater than or equal to 1000, at least one difunctional polyisocyanates are being used to form the polyurethane, and the ratio of maximum tensile stress to stripping stress is of said elastic adhesive sheet being more than 1.2, and the tensile stress at an elongation of 200% is being not more than 2.0 N / mm.sup.2.

The invention relates to a drilling machine and particularly relates to a novel drilling machine for a carbon fiber composite plate. The technical problem to be solved by the invention is to provide the novel drilling machine for the carbon fiber composite plate, which is low in energy consumption, convenient to operate and high in drilling precision. In order to solve the technical problem, the invention provides such novel drilling machine for the carbon fiber composite plate, comprising a left frame, a bottom plate, a placing platform, a first rocking handle, a first bearing block, a first rotating shaft, a first bevel gear, a pressing block, a moving rod, a sleeve, an elastic element, a first fixed plate and the like; the left side of the top of the bottom plate is welded with the left frame; the middle of the top of the bottom plate is welded with the placing platform; and the upper end of the right side of the left frame is connected with the first bearing block in a bolt connection way. According to the novel drilling machine for the carbon fiber composite plate, the horizontal movement of a drill bit and the drilling operation for any position on the carbon fiber composite plate can be realized through rotating the first rocking handle, and the vertical movement of the drill bit can be realized through rotating a second rocking handle.

The invention discloses a vegetable and fruit picking robot and a control method thereof. The vegetable and fruit picking robot comprises a walking mechanism. A base is arranged on the walking mechanism. Storage baskets are arranged at the front and rear ends of the base respectively. An execution mechanism, a recognition system, a first driving mechanism, a second driving mechanism and a controller are arranged on the base. The controller is connected with the recognition system, the first driving mechanism and the second driving mechanism through wires. Both fruits on trees and plant fruits at low positions can be picked, and therefore the picking object range is wide; the crawler-type walking mechanism drives a plurality of mechanical arms to work at the same time, and therefore the picking efficiency is high; a small arm is flexible and continuous in movement, the stretching range of the mechanical arms is wide, and therefore the vegetable and fruit picking robot can adapt to various operating environments; the multi-sensor function and the digital imaging technology are adopted, and therefore the fruits can be accurately recognized and positioned; clamping force is controlled through sensor detection, and therefore the fruits are prevented from being damaged.

The invention relates to an elastic tie down device with flexible, fabric hook and loop fastener panels that reduce or eliminate the safety and other risks associated with tie down devices that include rigid structural elements such as hooks, locks, clamps, and the like. Such a device would prevent damage or marring of the surface to which the tie-down device is being secured. The tie-down device would be suitable with a wide range of connection points so as to be operable with larger anchor points or oddly shaped anchor points that are not operable with traditional tie down hooks. The improved device might also allow for the selective attachment of a traditional, rigid hook.

The invention discloses a lateral current collector with double four-bar mechanisms connected in series. The lateral current collector comprises a base, a drive locking mechanism, a current collection sliding shoe, a sliding shoe base and a swing mechanism. The swing mechanism is connected between the base and the sliding shoe base. The drive locking mechanism is installed between the base and the bottom of the swing mechanism. The current collection sliding shoe is installed on the side, back on to the swing mechanism, of the sliding shoe base. The swing mechanism is formed by connecting the top four-bar mechanism and the bottom four-bar mechanism in series. The bottom four-bar mechanism is composed of a base, a main swing bar, the lower half part of an upper supporting bar and a lower connecting bar. The top four-bar mechanism is composed of the upper half part of the upper supporting bar, the sliding shoe base, an upper connecting bar and the upper half part of the lower connecting bar. A sliding shoe installation plate is arranged between the sliding shoe base and the current collection sliding shoe and connected with the sliding shoe base through a spherical hinge or a double-shaft deflection mechanism. The lateral current collector is simple and reasonable in structure and large in extension amplitude, and the current collection reliability of the lateral current collector can be guaranteed even when the lateral displacement and deflection amplitude of a train are large.

The invention discloses an extensible and retractable inner supporting tool. One end of a left-handed screw is installed in a screw installation hole in the plane geometric center of a supporting plate, and the left-handed screw is in rotating fit with the screw installation hole. A left-hand thread at the other end of the left-handed screw is installed in a threaded hole in the center at one endof a sleeve. One end of a right-handed screw is installed in a screw installation hole in the plane geometric center of the other supporting plate, and the right-handed screw is in rotating fit with the screw installation hole. A right-hand thread at the other end of the right-handed screw is loaded in a threaded hole in the center at the other end of the sleeve. The extensible and retractable inner supporting tool has extending and retracting functions; in a shortened state, the extensible and retractable inner supporting tool can be put into a shell and then extends to support a cylinder, rigid restraining to the cylinder is achieved, and the welding deformation is reduced; and by means of stress relief annealing heat treatment through the belt tool, deformation stress is eliminated, andtherefore the cylinder circular degree after welding is guaranteed, and the circular degree of the shell is reduced to 2.5 mm from 10 mm.

A preparation method of a biaxially stretched polyvinyl fluoride film belongs to the technical field of polymer processing, and the preparation method comprises the following steps: well mixing polyvinyl fluoride resin powder, a solvent, a plasticizer and fillers to obtain a mixed material with viscosity of 1.0 cpa-1.2 cpa, quantitatively delivering the mixed material to a hopper of a twin screw extruder by a slurry pump, performing strip casting by the twin screw extruder and a mould head, cooling and setting the casting strip by a cold hub, performing longitudinal stretching, transverse stretching, devolatilization, setting, surface treatment, trimming to obtain the biaxially stretched polyvinyl fluoride film. The preparation method of the invention reduces the processing temperature, and increases the film uniformity; by selective addition of fillers or pigment, the color of the film can be changed, which extends the application field of the film; the biaxial stretching process step improves the mechanical properties of the film, and increases the barrier property of the film; and a film product with good uniformity and excellent surface properties is obtained.

A ship loader comprises a ship loader body and a ship loader tripper car. The ship loader body is connected with the ship loader tripper car through a link rod, the ship loader body comprises a large arm, the large arm is connected with a walking mechanism through a rotary table, a swinging mechanism and a gantry in sequence, the large arm is connected with one end of a telescopic arm, the other end of the telescopic arm is connected with a sliding barrel mechanism, a balance weight is arranged at the root of the large arm, a pitching hydraulic system is arranged between the rotary table and the large arm, the telescopic arm is connected with a telescopic arm driving system, the large arm is connected with a boom conveyor system, and a cab is arranged at the top of the large arm. The ship loader tripper car comprises a tripper car structure, the tripper car structure comprises a tripper car conveying and unloading system and an electrical room, and a cable reel and a spray reel are connected on the lower portion of the electrical room. The ship loader is simple in structure, longest in conveying distance, stable and reliable in work, low in energy consumption, low in noise, easy to operate, large in telescopic range and larger in rotating angle range, and production efficiency is greatly improved.

The invention relates to a cleaning device, which includes a support rod, a bottom plate, a first motor, a bracket, a waste water frame, a right frame, a push plate, a rotating shaft, a first water pipe, a first one-way valve, a cylinder body, and a second one-way valve etc.; the left end of the bottom plate top is welded with a strut, the upper end of the strut is welded with a cylinder body, and the right wall of the cylinder body is symmetrically connected with the first elastic member up and down through the connection mode of the hook. The invention achieves the effects of novel structure, convenient operation, and no damage to medicinal materials. Workers can realize quick cleaning work during medicinal material processing through the device, which is not only simple in operation, but also saves time and effort.

The invention relates to a zigzag member space telescoping mechanism which comprises a member and a middle bracket and is formed by the series connection of a plurality of layers of same component units. When the mechanism extends or contracts, the members are mutually staggered, which can overcome the interference problem. The arrangement mode of the member and the middle bracket of the mechanism can greatly reduce the occupancy space, which can make the mechanism compact while keeping a large telescopic ratio. When the member length is less than the side length of the middle bracket, the cross section of the mechanism can always remain unchanged. Due to the space symmetry of the mechanism itself, the mechanism has the comparatively uniform distribution of the bearing capacity of the different directions in the space. The mechanism has the advantages of the less material consumption, the large telescopic amplitude, the good stress performance, the strong stability, the wide application range and the simple manufacturing process.

The invention relates to a method for preparing floating flax-like polyester fibers. The method comprises the following steps: preparing modified polyester POY yarns from modified polyester melt according to a POY process, processing the yarns according to a DTY process, arranging a trench-breaking roller and a variable frequency shifter between a zero roller and a first roller of DTY equipment, enabling modified polyester tows to pass through the surface of the trench-breaking roller, and dyeing, thereby obtaining the floating flax-like polyester fibers. The preparation method of the modifiedpolyester comprises the following steps: uniformly mixing terephthalic acid, ethylene glycol and 2,5,6,6-tetramethyl-2,5-heptandiol, and sequentially carrying out an esterification reaction and a condensation polymerization reaction so as to prepare modified polyester. The trench-breaking roller is a roller on the peripheral surface of which multiple ring grooves are formed; the variable frequency shifter is used for driving the polyester POY yarns to make a reciprocating motion on the peripheral surface of the trench-breaking roller along a center shaft of the roller; and the movement cycleof the variable frequency shifter is 5-99 reciprocal times per minute. The method disclosed by the invention is easy to operate, and the prepared fiber is excellent in dyeing property and air permeability and has excellent application prospects.

The invention relates to a charging device, in particular to an automatic charging intelligent control device. The automatic charging intelligent control device aims at achieving the technical purposes of being novel in structure, easy to operate and high in automation degree. To achieve the technical purposes, the automatic charging intelligent control device comprises a left rack, a bottom plate, a first fixing plate, a first bevel gear, a first bearing pedestal, a second bearing pedestal, a first electronic control valve, a collecting frame, a rotating disc, a first rotating shaft and the like, wherein the left rack is welded to the left side of the top of the bottom plate, the first bearing pedestal and the second bearing pedestal are connected to the right side of the top of the bottom plate in a bolted connection mode, and the first bearing pedestal is located on the left side of the second bearing pedestal. The automatic charging intelligent control device has the advantages of being novel in structure, easy to operate and high in automation degree; intelligent automatic raw material filling can be achieved through the device for working staff, operation is easy and convenient, and time and labor are saved.

The invention discloses a rope row type telescopic boom mechanism. The rope row type telescopic boom mechanism comprises a plurality of telescopic booms which are embedded and sleeved in sequence and can relatively stretch out and draw back, wherein a part of the telescopic booms stretches out and draw back through telescopic cylinders, and each of the other telescopic booms can stretch out and drawn back through a group of stretch-out travel ropes, stretch-out pulleys, draw-back travel ropes and draw-back pulleys; one group of the stretch-out pulleys and the draw-back pulleys are arranged on the tail and the head of one telescopic boom respectively, and two ends of corresponding draw-back travel ropes and stretch-out travel ropes are connected to the previous telescopic boom and the next telescopic boom respectively; and the draw-back pulleys are arranged on inner circumferential walls of the tails of the telescopic booms. According to the rope row type telescopic boom mechanism, the draw-back pulleys are arranged on the inner circumferential walls of the telescopic booms, and corresponding subsidiary components such as travel rope seats of the draw-back travel ropes are positioned on the inner circumferential walls of the tails of the telescopic booms, and spaces at the tail ends of the telescopic booms are not occupied anymore, so that the structure is compact, the lapping length of the telescopic booms is obviously increased, the stretch-out and draw-back amplitude is enlarged, and the hoisting performance of the booms is improved. The invention also provides a crane comprising the rope row type telescopic boom mechanism.

The invention relates to a gel supplying device, in particular to a solidification-prevention gel supplying device for LED lamp production. The solidification-prevention gel supplying device for LED lamp production aims at achieving the technical aims of being low in gel supplying speed, and capable of improving the gel performance and improving the work efficiency. In order to achieve the technical aims, the solidification-prevention gel supplying device for LED lamp production comprises a left frame, a first electric control valve, supporting rods, a bottom plate, a right frame, a stirring rod, a first rotating shaft, a baffle, a gel storage tank, a piston, a rack, a first gap gear and the like; the left frame is welded to the left side of the top of the bottom plate, the supporting rods are welded to the middle of the top of the bottom plate in a bilateral symmetry manner, the right frame is welded to the right side of the top of the bottom plate, and the gel storage tank is welded to the upper ends of the supporting rods. The effects of being low in gel supplying speed, and capable of improving the gel performance and improving the work efficiency are achieved.

Disclosed herein are form-fitting garments configured to hold an ostomy pouch close to the body via a shaped interior pocket creating a barrier between the pouch and skin of an individual. The garment may include a plurality of pockets such that an unused pocket may serve to hold additional supplies. The garment is preferably configured to have a maximum stretch in the horizontal direction allowing for the expansion of the pouch while having minimal stretching in the vertical direction to prevent the interior pocket and garment from sagging under the weight of the pouch.

The invention relates to a multi-layer sleeve tube cutter. The cutter comprises an upper joint, a piston, a central pipe, a piston sleeve, a cutter seat body, a cutter, a lower central pipe and a lower joint, the upper joint, the piston sleeve, the cutter seat body and the lower joint are sequentially in threaded connection, the piston is in threaded connection with the central pipe, the piston isinstalled on the upper end part of the central pipe, the central pipe penetrates through the upper joint, the piston and the interior of the cutter seat body, an upper spring is arranged on the central pipe, one end of the upper spring is limited through the end face of the piston, the other end of the upper spring is limited through the end face of the cutter seat body, the lower central pipe isarranged in the cutter seat body, three long hole grooves are uniformly formed in the cutter seat body, cutting knives are arranged in the long hole grooves, the cutting knives are connected with thecutter seat body through pin shafts, cutting teeth are arranged on the cutting knives, liquid holes used for cleaning and cooling the cutting knives are formed in the lower central pipe, and a lowerspring is arranged on the lower central pipe. By means of the cutter, the cutting of multiple layers of sleeve tubes can be completed by one underground operation, the replacement of the cutter is notneeded, and the construction efficiency is improved.

The invention relates to a stirring device, in particular to a 3D printing metal powder material stirring device, and aims to solve the technical problem of providing a 3D printing metal powder material stirring device which is simple in structure, rapid in stirring speed and uniform in stirring. To solve the technical problem, the invention provides the 3D printing metal powder material stirring device which comprises a bottom plate, first elastic parts, a right rack, a first fixing plate, a sliding track, a first electronic push rod, a first fixed pulley, a collecting basket, a second electronic push rod, a discharge hole and the like, wherein the first elastic parts are symmetrically arranged in the middle of the top of the bottom plate; the collecting basket is arranged on the left side of the top of the bottom plate; the right rack is arranged on the right side of the top of the bottom plate. The 3D printing metal powder material stirring device has the effects of being simple in structure, rapid in stirring speed and uniform in stirring, rapid stirring operation of metal powder can be achieved for operators by using the device, and not only is convenience in operation achieved, but also the working efficiency can be achieved.

A device and method for treating and preventing plantar fasciitis includes a wedge adapted to be placed under the big toe. The wedge has a top surface for supporting the big toe, a first support surface separated from the top surface by a first angle, and a second support separated from the top surface by a second angle. The first and second support surfaces are perpendicular with each other so that one rests on the floor and the other serves as a backstop. The wedge has a first position for inclining the top surface upwardly at the first angle to provide moderate stretching of the plantar fascia, and a second position for inclining the top surface upwardly at the second angle to provide maximum stretching. The first angle is within a range of 20 to 25 degrees, and the second angle is within a range of 65 to 70 degrees.

The invention discloses an overflow type pipetting device. The overflow type pipetting device comprises an overflow liquid storage mechanism; the transfer pipette moves upwards, so that liquid flowing from the upper end of the transfer pipette flows out to the outer side through the overflow holes in the outer side of the periphery of the outer sleeve and is stored in the annular liquid storage cavity defined by the liquid storage ring body and the outer sleeve, the liquid overflowing from the interior of the outer sleeve can be discharged, and the convenient liquid discharging function is achieved.

The invention discloses a thin-film printing water-based ink and a preparation method thereof. The thin-film printing water-based ink consists of the following raw materials in parts by mass: 30-35 parts of acrylic-modified waterborne polyurethane, 2-5 parts of an aldehyde-keton resin, 15-20 parts of am ethyl acetate solution, 5-10 parts of a wetting and dispersing agent, 8-30 parts of organic pigment, 25-43 parts of deionized water, 0.5-5 parts of a thickening agent and 1-5 parts of nanometer zinc oxide. The preparation method mainly comprises three steps of mixing, adjusting and filtering. An ink prepared by using the scheme is good in adhesion fastness for thin-film materials, and adapts to the great tensile amplitude and high viscosity of the thin film. Meanwhile the ink provided by the invention is fast in drying and is not prone to adhering; the solvent residue of printed packages is under standards and has a slight odor; the use of an aqueous solvent reduces environmental pollution caused by toxic or harmful products, so that hazardous substances on surfaces of printed materials can meet safety and health standards; the ink is safety and environmentally friendly; and meanwhile energy consumption can be obviously reduced.

The invention discloses a method for preparing a polyvinylidene fluoride membrane by using a water-soluble diluent and belongs to the field of high polymer materials. The method comprises the following steps: mixing polyvinylidene fluoride, a water-soluble diluent and a water-soluble organic additive, stirring to form a transparent polymer liquid, standing and defoaming; preparing the transparent polymer liquid into a primary membrane, immersing the primary membrane into a cooling liquid, curing and taking out the primary membrane, rapidly heating to a certain temperature, performing two-way synchronous draft treatment on a flat sheet membrane, or performing hot draft treatment on a hollow fiber membrane, finally immersing the membrane into a water bath, and curing to form the membrane; and soaking and drying the membrane, thereby obtaining the polyvinylidene fluoride microporous membrane. The primary membrane cured in the method is subjected to hot draft treatment, and high strength of the membrane is guaranteed; and meanwhile, a single water-soluble diluent is adopted, the diluent is conveniently recycled, the condition that the membrane is cleaned by using alcohols and other reagents is avoided, and the production safety is guaranteed. The membrane is simple in preparation method and can be applied to the fields of sewage treatment, foods and biological pharmacy.

The invention relates to a noise prevention multi-grain-size screening crusher. The noise prevention multi-grain-size screening crusher comprises a crushing box, sound insulation cotton, crushing hammers, a rotating shaft, a first-level screening device and a second-level screening device. The noise prevention multi-grain-size screening crusher is characterized in that a feeding port is formed in the upper portion of a box body of the crushing box, a discharging port is formed in the lower portion of the box body of the crushing box, and the rotating shaft is arranged at the middle portion of the crushing box and provided with at least three crushing hammers; and the outer side of the crushing box is wrapped by one layer of sound insulation cotton, the first-level screening device is arranged below the discharging port of the crushing box, and the second-level screening device is arranged below the first-level crushing device. The noise prevention multi-grain-size screening crusher insulates sound and prevents noise, classified screening can be conducted after crushing, the structure is simple, and multiple purposes are achieved.

An alternating current motor heat dissipation protection device is disclosed by the present invention, and comprises a shell, an element cavity, a buffer cavity and an electric connection cavity are formed in the shell, a resistor, an electromagnet and a diode are fixed in the element cavity, and the inner wall of the buffer cavity is rotatably connected with a rotating shaft through a torsion spring. The rotating shaft penetrates through the buffer cavity and the electric connection cavity to extend out of the shell and is fixedly provided with a rotating plate, a slow release mechanism is arranged in the buffer cavity, and the rotating plate is fixed to the circumferential side wall of the section, located in the electric connection cavity, of the rotating shaft. The device has the advantages that the electromagnet and the telescopic rod are arranged, the electromagnet generates an intermittent magnetic field through the unidirectivity of the diode, then the telescopic rod stretches out and draws back in a reciprocating mode, a push plate reciprocates, air flow is pumped, the air flow continuously flows in a suction hole and an exhaust hole, the flow speed of the air flow around the motor is increased, and the hot air flow is quickly diffused, so that the motor can effectively dissipate heat.

The invention relates to a high power density piezoelectric transducer for an ultrasonic surgical instrument. The existing product has small ultrasonic power. The high power density piezoelectric transducer comprises a plurality of groups of piezoelectric transduction units, wherein a solid trumpet-shaped deformation transformation block is arranged between every two adjacent piezoelectric transduction units, and insulation layers are arranged between the piezoelectric transduction units and the deformation transformation blocks. Each piezoelectric transduction unit comprises a plurality of disc piezoelectric sheets which are coaxially arranged, metal electrodes are respectively arranged on the surfaces of the disc piezoelectric sheets, and two cone frustum-shaped metal caps are arranged between every two adjacent piezoelectric sheets. All the piezoelectric transduction units have the same height, the diameters of the piezoelectric sheets of the plurality of piezoelectric transduction units are sequentially reduced, and all the deformation transformation blocks have the same height. The center distance between two adjacent piezoelectric transduction units satisfies the dispersion equation. With the high power density piezoelectric transducer, the electroacoustic conversion efficiency is effectively increased, the ultrasonic irradiation directivity is improved, and the ultrasonic energy of a local area is improved within a limited space.

The invention relates to a stirring device, particularly a conductive ink quick stirring device for RFID tag antenna manufacturing. The invention aims to provide a conductive ink quick stirring device for RFID tag antenna manufacturing, which has the advantages of simple structure, high stirring rate and uniform stirring. In order to solve the technical problems, the invention provides a conductive ink quick stirring device for RFID tag antenna manufacturing. The conductive ink quick stirring device for RFID tag antenna manufacturing comprises a bottom plate, elastic parts, a left rack, a first slider, a connecting rod, a collecting frame, a first slide rail, a first rack, a fixed link, a first quadrant gear, a jacking block and the like, wherein the right side of the top of the bottom plate is symmetrically provided with the elastic part; the right side of the top of the bottom plate is provided with the collecting frame; and the collecting frame is positioned on the right side of the elastic parts. The conductive ink quick stirring device achieves the effects of simple structure, high stirring rate and uniform stirring. The working personnel can implement quick stirring on the conductive ink by controlling the device, thereby enhancing the work efficiency.

The present invention discloses a telescopic menstrual cup capable of quickly conducting demolding, preventing leakage and facilitating liquid drainage. The menstrual cup is composed of a cup body, aliquid discharging pipe, a tightening rubber ring and a liquid discharging switch, the cup body is cup-shaped and hollow, a cup opening is formed in an upper part of the cup body, an outlet is formedin a bottom part of the cup body and communicates with the liquid discharging switch through the liquid discharging pipe, the liquid discharging pipe is axially telescopic and foldable, a plurality offolds are arranged on a pipe wall, an axial section is in a rounded sawtooth shape, the liquid discharging switch is hollow and tubular, a partition membrane is transversely arranged in the liquid discharging switch, an upper wall face of the partition membrane is a conical face or a spherical face or an A-shaped supporting plane, the partition membrane is axially provided with a notch to enablethe liquid discharging pipe to communicate with an outlet of the liquid discharging switch, two ends of the notch corresponding to an outer wall of the liquid discharging switch are provided with indication marks respectively, the indication marks are pressed to enable the notch of the partition membrane to open and close, a surrounding groove is formed in an outer wall, close to a joint part of the liquid discharging pipe, of the liquid discharging switch, and the separable tightening rubber ring is arranged in the groove. The menstrual cup effectively solves problems that production of the product is difficult to demould and the menstrual cup is easy to leak after being used for a long time, and greatly improves production efficiency and safety and durability.

The invention discloses a supporting device and a multifunctional chair provided with the same, the supporting device can be used for supporting a chair or fitness equipment, and the supporting devicecomprises a first frame body unit; the first supporting unit is connected with the first connecting position of the first frame body unit, and the height of the tail end of the first frame body unitis smaller than that of the first connecting position of the first frame body unit; and a second frame body unit which is rotationally connected with the rear part of the first frame body unit, and the rotational connection can enable the second frame body unit to move between a first posture for the deck chair or the seat and a second posture for the fitness equipment. The supporting device has multiple functions, can be used for selecting or switching requirements of fitness or reclining chairs or seats, enables the multifunctional chair provided with the supporting device to be used as theseats, the reclining chairs and fitness equipment, and is simple in structure, convenient and fast to operate and easy to carry and transport.

The invention provides a bellows structure and a bellows. The bellows structure comprises multiple layers of annular units and compensation units, the annular units and compensation units form tubularstructures, the annular units are uniformly arranged, a joint part is arranged between every two layers of annular units, and the compensation units are arranged on the joint parts; in an unbending state, projections of the peripheral contours of the annular units are coincided in the axial direction, and projections of the peripheral contours of the compensation units are coincided in the axialdirection; and in an bending state, the compensation units are located on the stretching face. The bellows comprises a bellows structure and a straight pipe structure, and one end of the bellows structure is connected with one end of the straight pipe structure to form a pipeline; and the bellows with the bellows structure has wider application range, larger stretching range and good economic andpractical values.