74results about How to "Large amount of elastic deformation" patented technology

The invention discloses a pressure-control type electric pressure cooker. A sealed body is formed by sequentially connecting a pot cover, a seal ring, an inner pot and an outer pot; a plurality of belleville springs, which are provided with opening grooves, are arranged between a heating plate and the outer pot; upper supporting rings are formed by horizontally flanging the small-diameter ends of the belleville springs towards inner sides, and lower supporting rings are formed by the big-diameter ends of the belleville springs; an elastic deformation area is formed by a conical wall parts between each of the upper supporting rings and each of the lower supporting rings; the elastic deformation areas penetrate through the upper supporting rings in a radial direction and extend to conical body parts, and the opening grooves that contour lines projected on a horizontal plane are in a cross form are formed; the opening grooves are of gradually expanded structures with upsides smaller than downsides from openings to bottoms; the lower supporting rings are supported on the bottom of the outer pot; the upper supporting rings are propped against supporting legs of the heating plate; and the supporting legs and the belleville springs are integrally positioned with and connected to the outer pot by virtue of fixed screws. The amount of elastic deformation of the electric pressure cooker is effectively improved by virtue of the belleville springs, and the change in induction pressure of a pressure detection device is more conveniently to be detected, so that the precision and the safety stability of pressure control are improved.

The invention discloses an electric automobile brake energy regeneration transmission device with an elastic rubber belt energy accumulator and aims at providing an electric automobile brake energy regeneration transmission device which is high in energy conversion efficiency, large in energy density, light in weight and simple in structure. The electric automobile brake energy regeneration transmission device comprises the elastic rubber belt energy accumulator and a gear transmission case. The power connecting end of the elastic rubber belt energy accumulator is connected with the power connecting end of the gear transmission case, and two ends of a first shaft of the gear transmission case are respectively connected to the output end of a speed changer and the power input end of a main speed reducer. The electric automobile brake energy regeneration transmission device is used for converting kinetic energy in the electric automobile braking process into elastic potential energy to be stored in the elastic rubber belt energy accumulator, converts the elastic potential energy stored in the elastic rubber belt energy accumulator into electric automobile kinetic energy in the electric automobile starting process, achieves braking energy regeneration of an electric automobile and achieves the purposes of reducing electric quantity consumption of the electric automobile and increasing a driving range of the electric automobile.

A positioning mechanism in a positioning and clamping device includes an annular tapered surface that is formed on an outer periphery of a cylindrical shaft for positioning a pallet in the horizontal direction, and has a decreasing diameter toward an axial tip of the cylindrical shaft. An annular engaging mechanism, which is formed on an inner periphery side portion of an annular engagement member, is engageable with the annular tapered surface, and is elastically deformed in the radial direction, as a result of engagement with the annular tapered surface. The engaging mechanism has a tapered ring portion, which makes a face contact with the annular tapered surface, and multiple ribs extending outward, radially, from the tapered ring portion.

The invention relates to a laser cleaning device, in particular to an easy-to-move laser cleaning device, and belongs to the technical field of laser cleaning. The easy-to-move laser cleaning device comprises a supporting mechanism, an X-axis motion mechanism, a Y-axis motion mechanism, a Z-axis motion mechanism, a laser cleaner, gripping mechanisms, adjustment mechanisms, a blocking plate and swivel wheels. A control system of the easy-to-move laser cleaning device automatically determines a cleaning path by analyzing images before laser cleaning, and can effectively improve the working efficiency. A cleaning result is judged through the analysis on images after laser cleaning; if the cleaning result is unsatisfactory, the cleaning task is performed once again until the cleaning result issatisfactory so as to ensure a satisfactory cleaning effect; and the cleaning effect is good. The control system automatically controls the coordinated motion of a first driving motor, a second driving motor and a third driving motor according to the cleaning path to separately drive the linear motion of the X-axis motion mechanism, the Y-axis motion mechanism and the Z-axis motion mechanism so as to drive a laser cleaning head of the laser cleaner to complete the cleaning task.

The invention discloses a flow regulating device comprising a case and a regulating piece, wherein a water channel is arranged in the case and is a stepped hole, the stepped hole is provided with a step plane which is fixedly provided with a plurality of bulged bases thereon, and an interval is formed between two adjacent bulged bases. The regulating piece is made of an elastic material and can carry out elastic deformation under stress; the regulating piece is installed in the case and is arranged on the bulged base; spaces above the step plane, below the regulating piece and between two adjacent bulged bases form the water passing port of the water channel; and the elastic deformation of the regulating piece is regulated to press parts of the regulating piece into the water passing port so as to change the water passing section area of the water passing port. The invention has the advantages that the regulating piece is arranged above the bulged base, and the bottom surface of the regulating piece, which corresponds to the water passing port, has no support; the direction of the elastic deformation of the regulating piece is the same with flow direction, so that the regulating piece has big elastic deformation, wide water amount regulating range, high sensitivity for the elastic deformation aiming at pressure change and high regulating veracity.

The invention provides a polycyclic filter lens group capable of independently adjusting the rotation angle of each lens, which comprises a positioning frame body, a first pivoting frame body, a transfer frame body and a second pivoting frame body, wherein each of the frame bodies is a hollow round frame body; one end of the positioning frame body can be positioned to the front edge of a camera lens; a first lens is fixedly arranged at the place, corresponding to the hollow position, inside the first pivoting frame body, one end of the first pivoting frame body is mutually pivoted with the other end of the positioning frame body, and a first arc-shaped surface is arranged along the axial direction on the first pivoting frame body near the other end; a second arc-shaped surface is arranged along the axial direction on the transfer frame body near one end, so as to enable the transfer frame body and the first pivoting frame body to be mutually pivoted through the second arc-shaped surface and the first arc-shaped surface; and a second lens is fixedly arranged at the place, corresponding to the hollow position, inside the second pivoting frame body, and one end of the second pivoting frame body can be mutually pivoted with the other end of the transfer frame body.

The invention relates to a three-eccentric and bidirectional metal sealing butterfly valve. A flow passage is arranged in a valve body, a valve seat is sealed and fixedly arranged on the inner wall of the flow passage, a valve rod is vertically arranged and penetrates through the flow passage, the upper end of the valve rod and the valve body are sealed and connected by a first rotary type sealing and connecting structure, the lower end of the valve rod and the valve body are sealed and connected by a second rotary type sealing and connecting structure, a valve plate is arranged in the flow passage and is fixedly arranged on the valve rod, a mounting step is arranged at the periphery of the valve plate, a sealing ring is arranged on the mounting step and is pressed and fixed by a sealing ring press ring, the sealing ring press ring is fixedly connected with the valve plate by a first screw, and the sealing ring is in fit with the valve seat, so as to control the opening or closing of the valve. The three-eccentric and bidirectional metal sealing butterfly valve is characterized in that virtual gaps are respectively arranged between the inside surface of the sealing ring and the mounting step surface as well as between the outside surface of the sealing ring and the pressing surface of the sealing ring press ring, and sealing ring sealing gaskets are arranged in the virtual gaps. The three-eccentric and bidirectional metal sealing butterfly valve has the advantages that the structure design is novel, the requirement of stricter working condition is well met, the whole cost is reduced, and the service life of the valve is prolonged.

This invention discloses a longitudinal towing device and a bogie with the same. The longitudinal towing device is used for connecting a swing bolster and a framework of the bogie, and comprises a towing pull rod and two pull rod seats, wherein the two pull rod seats can be respectively fixed with the swing bolster and the framework, the towing pull rod is connected with the two pull rod seats through a spherical hinge assembly, and the spherical hinge assembly comprises a spherical hinge axle and a spherical hinge sleeve; the spherical hinge axle is articulated and matched with the spherical hinge sleeve through a spherical curved surface. Because the longitudinal towing device comprises spherical hinge assemblies, and the spherical hinge axle and the spherical hinge sleeve can be relatively rotated, on one hand, the longitudinal towing device can ensure to transmit larger longitudinal towing force, and on the other hand, the longitudinal towing device can ensure that the additional lateral stiffness of the bogie is smaller, enables the bogie with the longitudinal towing device to keep larger transverse natural bow while transmitting longitudinal towing force, and ensures the railway vehicle to have better dynamics performance.

The invention relates to a bismaleimide structural adhesive film with a high temperature resistance level as well as a preparation method and application thereof, and relates to a structural adhesivefilm. The structural adhesive film solves the problem that the conventional bismaleimide structural adhesive film is low in basic intensity or low in temperature resistance level. The structural adhesive film is prepared from a bismaleimide monomer composition, an allyl phenoxyl compound monomer modifier, a high-polymer material flexibilizer, an inorganic nanometer particle thixotropic agent and acarrier. The method comprises the following steps: melting phthalazinone structural thermoplastic resin into a modifier in a hot melting manner, then performing hot melting blending on the bismaleimide monomer composition, active end group liquid rubber and the resin, feeding the thixotropic agent into a resin system, and uniformly mixing, so as to form a sizing material, and compounding the sizing material with the carrier, so as to obtain the structural adhesive film. The normal temperature shear strength of the adhesive film can reach 20.2 MPa, 316 DEG C shear strength can still reach 10.8MPa, and the honeycomb cylinder peel strength reaches 95.0 N.m / m. The adhesive film is applied to cementing of aerospace refractory metal or composite material structural pieces.

The invention provides an acoustic wave transducer. The transducer comprises a notched shell, a receiving transducer module, a transmitting transducer and a bag, wherein the notched shell is provided with slotted holes for improving the acoustical insulation effect of the notched shell; the receiving transducer module is sleeved in the notched shell and comprises more than two receiving transducers sequentially connected together in series through screw threads; the transmitting transducer of which one end is fixedly connected to the interior of the notched shell is sleeved in the notched shell and arranged on one side of the receiving transducer module; the bag is a flexible part, and is sleeved in the notched shell and wrapped around the receiving transducer module; and oil is filled in the bag. In the transducer, as the receiving transducer module comprises more than two receiving transducers sequentially connected in series through the screw threads, each transducer can be assembled singly and conveniently; the deformation of each transducer is not accumulated during the deformation of the notched shell, so the overall deformation of the receiving transducer module is reduced; in addition, only one end of the transmitting transducer is fixedly connected with the notched shell, so the influence of the deformation of the notched shell on the transmitting transducer can be effectively avoided.

The invention discloses a bulb structure and steering system of a steering pull rod. The bulb structure comprises a bulb pin (1), a joint part (4), a base (5) and an elastic supporting base (6), wherein the a limit accommodating cavity for accommodating a bulb is arranged in the joint part, and a pin rod stretches out towards one side of the joint part from the bulb; the base is mounted on the bottom wall of the other side opposite to the side from which the pin rod stretches out, of the joint part; the elastic supporting base is positioned in the limit accommodating cavity and mounted on the base so as to support the bulb, the elastic supporting base is an integrated annular elastic piece, and the annular elastic piece comprises an inner ring part (61) and outer ring parts (62), wherein the bottom end of the inner ring part and the bottom ends of the outer ring parts are respectively arranged on the base in a supporting manner, the bottom end of the bulb is inserted in the inner ring part and is elastically propped against the inner wall of the inner ring part. The bulb structure disclosed by the invention has the advantages that the components are few, the assembled structure is simple, the elastic supporting base and the base are unlikely to deform and lose efficacy, and the large-scale manufacturing, maintenance and replacement are convenient to perform.

The invention is a plastic ball valve, comprising end cover, valve body, valve ball, sealing member, etc, and characterized by adopting lip seal ring and double valve rod structure. And it has advantages of simple structure, convenient to make, good sealing effect, small turn-on and turn-off moment, low abrasion of valve ball and sealing member, long service life, low failure rate, etc.

The invention relates to a refrigeration device comprising the following members: a box body with an inner container used for limiting a storage space; a door body pivoted to the box body so as to open and / or close at least partial the storage space; a defrost mechanism arranged on the inner side of the door body and used for scrapping at least partial the inner container in a door body opening and / or closing process, thus removing at least partial the frost on at least partial the inner container. The refrigeration device can carry out defrost operations in each door body opening and closing process, thus scrapping off the frost on the inner container before the frost is solid, and solving the technical problems that the solid frost on the inner container of the refrigeration device cannot be easily removed; in addition, the complex defrost process can be resolved into normal door opening and closing processes, so users need no extra defrost operation; the refrigeration device is simple in application and low in cost.

The invention discloses a mechanical double-acting disc brake. The mechanical double-acting disc brake comprises a disc plate and a calliper, wherein the calliper comprises a shell, a support and a connection component; a drive arm and a drive plate are arranged on the shell; a drive component used for converting the rotary motion of the drive arm to the axial motion of the drive plate is connected between the drive arm and the drive plate; a first friction sheet is installed on the end surface of the drive plate; a second friction sheet is installed on the shell; the disc plate is arranged between the first friction sheet and the second friction sheet; the connection components comprises a connection seat which is movably connected to the shell and capable of axially moving relative to the drive plate, an annular bulge edge is arranged at one end close to the drive component, of the drive plate; and an elastic gasket is arranged between the connection base and the annular bulge edge. According to the mechanical double-acting disc brake disclosed by the invention, the two friction sheets can move towards the disc plate simultaneously, and the deformation of the disc plate is not required during braking, thus obstruction on the normal running of a vehicle due to the deformation of the disc plate can be avoided.

The invention discloses a wing of a micro ornithopter. According to the present invention, a main beam is level and straight; the front edge points of five wing ribs are fixed on the main beam; the wing rib No.1, the wing rib No.2 and the wing rib No.3 are perpendicular to the main beam; the wing rib No.4 and the wing rib No.5 form acute angles with the tip part direction of the main beam; the chord lengths of the wing rib No.1, the wing rib No.2 and the wing rib No.3 are the same; the chord length of wing rib No.4 and the chord length of the wing rib No.5 are sequentially reduced, and are shorter than the chord length of the wing rib No.1; an assistant beam is an arc structure; the outer edge point of the assistant beam is fixed on the main beam between the end point of the tip part of the main beam and the rear edge point of the wing rib No.5, the root part of the assistant beam passes through the rear half part of the wing rib No.1, the assistant beam contacts the positions corresponding to the five wing ribs and is fixed with the positions corresponding to the five wing ribs; the main beam, the assistant beam and the wing ribs form a wing structure frame, and a skin is adhered above the frame to form a complete wing. With the present invention, the stiffness distribution of the whole wing flatly transits, the structure continuity is good, the good force loading property is provided, the structure is simple, and the wing of the present invention is convenient to manufacture.

The invention discloses a sealing structure for a compressor plunger, and aims at improving the sealing performance, and reducing the contact area of a sealing ring and the plunger. The essential of the technical scheme is as follows: the sealing structure for the compressor plunger comprises a cylinder body and a plunger, wherein the cylinder body is provided with a plunger hole allowing the plunger to penetrate; a sealing groove is formed in the sidewall of the plunger hole; the sealing ring is arranged in the sealing groove; the section of the sealing ring is configured to be S-shaped; theinner wall of the sealing ring is bonded onto the sidewall of the plunger; and the outer sidewall of the sealing ring is bonded onto the sidewall of the sealing groove. The sealing structure for the compressor plunger is capable of improving the sealing performance, and reducing the contact area of the sealing ring and the plunger.

A yoke for a universal joint, having provided in a coupling hole (14a): a press-fit hole section (21) for press-fitting an end section of a shaft, provided between a center section and another end section in the axial direction; and a non-press-fit hole section (22) having a larger diameter than the press-fit hole section (21) and not having the shaft end section press-fitted therein, provided at one end section in the axial direction.

The invention discloses an anti-twist watertight device for an underwater electric connector and belongs to the field of marine geophysical prospecting. The device comprises a metal connector, an adjusting tube, an outer metal housing, a first conical part, a first rubber pad, an isolating ring, a second rubber pad, a second conical part, a conical cover, a steel wire sheath mounting plate, a rubber ring, a transition ring, a concave ring, a flared steel wire mesh cover, a rubber jacket, a locking nut, a hollow wedged column, strength bearing aramid fibers and an inner wedged positioning column. Peripheral equipment includes cables. The isolating ring is arranged between the rubber pads to enable the rubber pads to form a serial connection structure, sealing similar to a labyrinth is formed, and sealing performance at the rubber pads is improved. Further, the sealing connector and the cables are high in connection strength and anti-twist performance.

The invention discloses a tire type puncture-proof eccentric packing box. The tire type puncture-proof eccentric packing box is formed by taking a packing cavity (1) as a main body; the outer wall of the packing cavity is provided with an aerating nozzle (18); a tire frame (6), a tire (8) and a packing (20) are arranged inside the cavity; an enclosed space is formed between the tire (8) and the inner wall of the packing cavity (1); the lower end of a thin pipe is connected integrally with a middle disk (4) of an eccentricity finding flange; a gland (10) and a pressure cap (12) are arranged above the tire (8) and the packing (20); and the pressure cap (12) and a set of puncture-proof packing box (16) are combined to construct a set of complete tire type puncture-proof eccentric packing box. When an inflation sleeve is used for inflating air into the cavity (19) and the enclosed space of the tire (8) through the aerating nozzle (18), the tire (8) wall plumps up towards the center through a vent hole (7) in the tire frame (6) along with the increase of the air amount, centering transverse pressure is applied to the packing (20), and the packing (20) is driven to clamp a polished rod tightly, so that the aim of sealing is fulfilled.

The invention relates to an air filter device which comprises a second shell (2), a filter element, a first turbine (3), a first turbine hood (4), a first rotary shaft (5) and a scraping blade (6). The filter element is cylindrical. A second air outlet (19) communicates with a filter element inner cavity through an inner cavity of the first turbine hood (4). The first turbine (3) and the filter element are both connected to the first rotary shaft (5). The first turbine (3) is located in the inner cavity of the first turbine hood (4) and rotationally connected with the first turbine hood (4) through the first rotary shaft (5). The filter element is rotationally connected with the second shell (2) through the first rotary shaft (5). One end of the scraping blade (6) is tightly attached to the peripheral wall of the filter element. The air filter device has the advantages that when in use, the air filter device can remove dirt such as dust and fine sand adsorbed to the surface of the filter element, accordingly, the air inlet amount of an engine is guaranteed, the engine can stably and normally work, and further, the service life of the filter element is greatly prolonged.

A structure for closing a hole for a hydraulic circuit has, in order to prevent, for a long period of time, the leakage of oil from the hole: a flange section (22) located at the base end-side portion of a receiving groove (25), in which an O-ring (30) is mounted, and having a greater outer diameter than a shaft section (21); and a polygonal column-like head section (23) which is located at the base end-side portion of the flange section (22) and to which a fastening tool is mounted. A plug (20) is configured so that: the plate thickness (d) of the flange section (22) measured in the longitudinal direction of the shaft section (21) is less than the height (c) of the head section (23); and the outer diameter (a) of the head section (23) is less than the opening diameter (φ) of the hole (10) for a hydraulic circuit. When the plug (20) is engaged through threads with the opening end of the hole (10) for a hydraulic circuit, the plug (20) is in pressure contact with the outer surface of a body with the flange section (22) serving as the seating surface.

The invention discloses a plate overlapping straightening process for waved surfaces on two sides of an ultra-thin middle-thick plate. An I-shaped lining plate is overlapped on the plate to be straightened so as to be straightened together with the plate to be straightened. Tension is generated in the middle area in the width direction of the steel plate in the straightening process. The elastic deformation amount of a middle thick layer of the middle area in the width direction of the steel plate is increased. The waved surfaces on the two sides of the ultra-thin middle-thick plate are effectively straightened. The plate overlapping straightening process includes the steps that the lining plate is manufactured, and the I-shaped liming plate is aligned with the plate to be straightened; a first time of straightening is carried out, and the plastic deformation amount is 80%; a second time of straightening is carried out, and the plastic deformation amount is 80%. According to the plate overlapping straightening process, the -shaped lining plate is overlapped on the plate to be straightened so as to be straightened together with the plate to be straightened, tension is generated in the middle area in the width direction of the steel plate in the straightening process, and the elastic deformation amount of a middle thick layer of the middle area in the width direction of the steel plate is increased. Finally, the waved surfaces on the two sides of the ultra-thin middle-thick plate are effectively straightened.

The invention discloses a pressure-controlling electric pressure cooker. A pot cover, a sealing ring, an inner pot and an outer pot are sequentially connected to form a sealing body, and several disc springs with opening grooves are arranged between the heating plate and the outer pot. The small-diameter end of the disc spring faces the inner horizontal flanging to form an upper support ring, the large-diameter end of the disc spring forms a lower support ring, and the cone wall between the upper support ring and the lower support ring forms an elastic deformation zone, radially through the upper The support ring extends to the cone and is provided with a cross-shaped open slot whose contour line projected on the horizontal plane. From the notch of the open slot to the bottom of the slot, it has a gradually expanding structure, and the lower support ring is supported on the bottom of the outer pot. , the upper support ring leans against the feet of the heating plate, and the feet and disc springs are positioned and connected to the outer pot as a whole through fixing screws. The disc spring it has effectively increases the amount of elastic deformation, which is beneficial to the pressure detection device to sense pressure changes, thereby improving the pressure control accuracy and safety and stability.

The invention discloses an elastic piston and a high pressure pumping system and method. The elastic piston comprises a piston body. A front side inclined wall and a rear side inclined wall are formedon the front side and the rear side of the circumferential side wall of the piston body correspondingly, a concave area is formed between the circumferential side wall of the piston body accordingly,a first included angle is formed between the front side inclined wall and the rear side inclined wall, a second inclined angle is formed between the front side inclined wall and the center axis of the piston body, and the largest diameter of the front side inclined wall is larger than the diameter of a piston cavity wall. According to the elastic piston, the end of the front side inclined wall and the piston cavity wall form elastic abutting contact, and therefore effective seal is formed on the front side of the piston. Meanwhile, by arranging the concave area, the front side inclined wall has the larger radial elastic deformation amount, and the end of the front side inclined wall and the piston cavity wall form tight fit contact. Compared with a traditional cylindrical piston, the requirements for piston machining precision are lowered by means of the design of the front side inclined wall and the rear side inclined wall of the piston.

The invention provides a positioning structure of an antenna support and a bogie. A bogie positioning plate is arranged on the bogie, and an antenna support positioning plate is arranged on the antenna support; the bogie positioning plate and the antenna support are fitted together to form a positioning mounting pair; the positioning structure further comprises a plurality of bolt fasteners used for fastening the positioning mounting pair; the positioning mounting pair is provided with a plurality of positioning through holes; one screw rod of each bolt fastener penetrates through one positioning through hole; positioning sleeves with rigid materials are arranged between the screw rods and the positioning through holes; the outer walls of the positioning sleeves are in interference fit with the inner walls of the positioning through holes; and the inner walls of the positioning sleeves are in clearance fit with the screw rods. According to the positioning structure, the positioning sleeves are arranged between the screw rods and the positioning through holes, positioning pins are matched, positioning of the antenna support and the bogie on the connecting plane is achieved, the positioning sleeves and the positioning pins are subjected to shearing force under various working conditions, the situation that the single-end bolt is subjected to transverse shearing force under various working conditions is avoided, and the phenomenon that the single-end bolt is broken due to fatigue is avoided.

The invention discloses a wing of a micro ornithopter. According to the present invention, a main beam is level and straight; the front edge points of five wing ribs are fixed on the main beam; the wing rib No.1, the wing rib No.2 and the wing rib No.3 are perpendicular to the main beam; the wing rib No.4 and the wing rib No.5 form acute angles with the tip part direction of the main beam; the chord lengths of the wing rib No.1, the wing rib No.2 and the wing rib No.3 are the same; the chord length of wing rib No.4 and the chord length of the wing rib No.5 are sequentially reduced, and are shorter than the chord length of the wing rib No.1; an assistant beam is an arc structure; the outer edge point of the assistant beam is fixed on the main beam between the end point of the tip part of the main beam and the rear edge point of the wing rib No.5, the root part of the assistant beam passes through the rear half part of the wing rib No.1, the assistant beam contacts the positions corresponding to the five wing ribs and is fixed with the positions corresponding to the five wing ribs; the main beam, the assistant beam and the wing ribs form a wing structure frame, and a skin is adhered above the frame to form a complete wing. With the present invention, the stiffness distribution of the whole wing flatly transits, the structure continuity is good, the good force loading property is provided, the structure is simple, and the wing of the present invention is convenient to manufacture.

The invention provides a telescopic compensation connector for a vacuum traffic pipeline, and relates to the technical field of vacuum pipeline compensation of vacuum rail traffic. The telescopic compensation connector comprises a pipeline straight-opening end and a pipeline bell end for expanding of adjacent pipelines; a surface sealing layer is arranged on the outer wall of a connecting part ofthe pipeline straight-opening end, and a hard supporting plate ring with the section being in a comb tooth shape is arranged on the pipeline inner wall of a connecting part of the pipeline bell end; an annular soft seal blade plate is arranged in a comb-shaped gap of the hard supporting plate ring; the outer diameter of the annular soft seal blade plate and the inner diameter of the hard supporting plate ring are fixed; the end face of the inner diameter of the annular soft seal blade plate makes contact with the pipe end surface sealing layer, and the tooth-shaped annular inner surface of thehard supporting plate ring is in clearance fit with the surface sealing layer of the pipeline straight-opening end; the comb tooth gap of the hard supporting plate ring is greater than the thicknessof the annular soft seal blade plate; and the end face of the inner diameter of the annular soft seal blade plate makes contact with the surface sealing layer. The telescopic compensation connector can be applied to construction of the vacuum traffic pipeline.

The invention discloses a replacement cover for a biochemical analyzer assembly line. The replacement cover comprises a shaft sleeve cover body, a flange edge and big-end-up conical sealing ring edges, the upper end of the shaft sleeve cover body is sealed, the upper outer wall of the cover body radially extends outwards to form the flange edge, the lower outer wall of the cover body radially extends outwards to form the big-end-up conical sealing ring edge, and the flange edge is provided with an annular groove. The replacement cover is further characterized in that axial opening grooves are formed in the peripheries of the conical sealing ring edges, the conical sealing ring edges include an upper conical sealing ring edge and a lower conical sealing ring edge, and the replacement cover is made of EVA (ethylene-vinyl acetate) materials. When used for the biochemical analyzer assembly line, the replacement cover can be automatically arranged, manual placement is omitted, the replacement cover can be easily pressed into a blood collection tube and pulled out from the blood collection tube, and working efficiency is remarkably improved.