30results about How to "No gap" patented technology

This utility model relates to the field of materials processing technology, and in particular to a high-strength, high-precision, low-density composite profile with an arc surface; it includes a hollow profile structure and a solid profile structure, which are bonded together by a mortise and tenon structure to form an alternating continuous profile structure; the hollow profile structure has an extruded arc-shaped hollow outer wall, filled with glass microspheres, and mortise and tenon grooves and overlapping surfaces at both ends; the solid profile structure has an arc-shaped solid body, with mortise and tenon blocks and overlapping grooves at the ends that match the trapezoidal mortise and tenon grooves. This composite profile, through the alternating splicing design of the hollow and solid profile structures combined with the trapezoidal interlocking structure of the mortise and tenon grooves and blocks, significantly improves the connection reliability and assembly efficiency.

The utility model relates to stamping die technical field discloses a hardware machining stamping die of automatic discharge, include: stamping die main part, lift pushing mechanism and horizontal pushing displacement mechanism. The utility model has the following advantages and effect: through being provided with lift pushing mechanism and horizontal pushing displacement mechanism, lift pushing mechanism can provide the workpiece from the inside vertical upward push of lower die main part from the completion, when the workpiece is taken out from the inside of lower die main body, can be through horizontal pushing displacement mechanism to its horizontal direction of exerting displacement, so that the workpiece can be removed from the workbench surface of lower die main body, realizes the worker can place the next group of materials on lower die main body and carry out the stamping work again as soon as possible, and the occupation position of lift pushing mechanism and horizontal pushing displacement mechanism is small, can avoid the influence of the position of the equipment placed on site.

The coiled steel box saddle assembly device features two sets of opposing fixed and movable clamping components on a support platform. Connecting components are located on both sides of the support platform, with bottom cylinders fixed to them. The free end of the piston rod of the bottom cylinder is connected to the clamping part. A rotating part is located on the support platform, connected to the clamping part. The bottom cylinders drive the clamping part, which in turn rotates downwards and presses down, thus clamping the end saddles. This invention enables rapid positioning of the two end saddles and two middle saddles. The bottom cylinders push the clamping parts to clamp the ends, ensuring minimal deformation during welding. Similarly, cylinders push clamping components in both the transverse and longitudinal directions to tightly compress the saddle steel structure, ensuring no gaps during assembly, thereby improving the assembly efficiency of the coiled steel box saddles and enhancing welding quality.

The utility model discloses full-automatic straight paper cup processing equipment which comprises a bottom plate, a plurality of rollers are rotatably connected to the inner surface of the bottom plate, a paper conveying belt is rotatably connected to the outer walls of the rollers, a supporting frame is fixedly connected to the upper surface of the bottom plate, a hydraulic rod is fixedly connected to the lower surface of the supporting frame, and a lifting frame is fixedly connected to the lower end of the hydraulic rod. A cover shell is fixedly connected to the lower surface of the lifting frame, two sliding grooves are formed in the cover shell, sliding blocks are connected to the inner surfaces of the two sliding grooves in a sliding mode, through the components, the edge of paper can be flattened, the paper can be wound and attached to be made into the paper cup subsequently, the flat edge can guarantee that all parts of the paper cup are attached tightly in the forming process, and the paper cup forming quality is improved. The paper cup is simple in structure and free of wrinkles and gaps, so that the overall quality of the paper cup is improved, and the situation that paper scraps are clamped between the edges of the paper when the paper is wound and attached, and the paper cannot be completely and tightly attached together can be prevented.

The utility model relates to rice -shrimp culture technical field especially discloses a kind of modularization escape-preventing device for rice -shrimp co-production, to solve the problem of poor escape-preventing effect of existing device, low installation efficiency, insufficient wind resistance and biting resistance performance.The device includes escape-preventing plate, and the bottom of plate body is provided with plug nail, and the upper end is provided with inverted U-shaped top inner hem;Wind-resistant micro-perforation with 5°inclination angle is opened in the upper portion of plate face;T-shaped convex rod is arranged on the left side of plate body, and the right side is provided with matched T-shaped groove one and T-shaped groove two;Connection assembly is arranged in the slot of both ends.By T-shaped structure, quick splicing and turning adaptation are realized, the extension rod enhances soil fixation, and multiple structures cooperatively improve the escape-preventing effect, while having wind resistance, biting resistance, efficient installation, and adaptation to multiple terrains, etc.Features, suitable for rice -shrimp co-production field, can significantly reduce breeding loss, and has higher practical value.

This invention discloses a gallbladder drainage stent for ERCP surgery, comprising an insertion tube, several sets of connecting ribs fixedly connected to the outside of the insertion tube, a communicating groove opened on the outside of the connecting ribs, several sets of rotating plates rotatably connected inside the communicating groove, a rotating block rotatably connected to the inner side of the outer end of the rotating plate, a support plate fixedly connected to the outside of the rotating block in the same group, sliding rods slidably connected to the inside of both sides of the support plate, contact plates fixedly connected to the outside of the sliding rods, several sets of connecting tubes fixedly connected between the contact plates, a through tube fixedly connected between the middle of the connecting tube and the inside of the insertion tube, and a fluid inlet opened on the outside of the connecting tube. The entire stent can be deployed and anchored with only one action, making the operation simple and quick, significantly shortening the operation time, reducing surgical risks and patient suffering.

The present invention relates to a stepless brake device of an automobile seat, in which a coupling piece formed on a plate cover disposed at an outermost back surface is coupled to a housing cover disposed at an outermost front surface in a caulking manner. Accordingly, coupling between parts can be firmly achieved, and an axial gap between the parts can not be generated. In addition, since tolerance accumulation of the parts does not occur, inclination of a roller is reduced, so that collision noise of the roller can be prevented at the time of release operation.

This invention discloses a self-cleaning filter structure for a vacuum cleaner, comprising: a filter assembly including a filter support and a filter, the filter being sleeved on the filter support; the filter support including a first positioning ring, a filter support frame, and a first mounting base, the first mounting base having a locking part; a scraper assembly rotatably sleeved on the filter and filter support, including a second positioning ring, a second mounting base, and a plurality of scrapers disposed between the second positioning ring and the second mounting base; the second positioning ring being sleeved on the first positioning ring; the second mounting base being fitted onto the first mounting base; the scrapers being in close contact with the outer surface of the filter; and a fastener, which passes through the mounting hole of the second mounting base and is locked and positioned within the locking opening of the locking part. This invention can solve the problem that existing vacuum cleaner filters cannot meet the requirements for convenient, efficient, and environmentally friendly filter self-cleaning.

This utility model discloses a heat treatment quenching induction coil device, which includes a connecting bracket, a fixing plate, inlet and outlet water pipes, and a heating coil. The bottom of the connecting bracket is used for mounting on a quenching device. The connecting bracket has inlet and outlet water channels. One end of the inlet and outlet water pipes is connected to the connecting bracket, and the other end of the inlet and outlet water pipes extends out of the connecting bracket and connects to the heating coil. The inlet and outlet water pipes are connected to the inlet and outlet water channels. The fixing plate is sleeved on the inlet and outlet water pipes and is connected to the connecting bracket and presses against the inlet and outlet water pipes. The fixing plate effectively strengthens the connection between the inlet and outlet water pipes and the connecting bracket, ensuring full contact between the inlet and outlet water pipes and the connecting bracket without gaps. This effectively reduces sparking during production, significantly improves water leakage, increases work efficiency, ensures the reliability of heat treatment quality, and reduces manual labor intensity.

The utility model provides a gift box L-shaped sealing and cutting machine structure capable of improving heat shrinkage uniformity, and belongs to the technical field of sealing and cutting machines, the gift box L-shaped sealing and cutting machine structure capable of improving heat shrinkage uniformity comprises a sealing and cutting base, a pressing cover frame, an adjusting baffle assembly, a heating wire assembly and a cutter assembly, the press-fit cover frame is located over the sealing and cutting base, the sealing and cutting base and the press-fit cover frame are correspondingly arranged in the vertical direction, the short edge of one side of the press-fit cover frame is connected with the corresponding short edge of the sealing and cutting base through a hinge structure, and a rotating shaft of the hinge structure is parallel to the straight line where the short edge of the sealing and cutting base is located. The adjusting baffle assembly is installed in the sealing and cutting base, the heating wire assembly is arranged around the adjusting baffle assembly, the cutter assembly is installed at the corresponding position of the sealing and cutting base and the pressing cover frame, and the problems that heating elements in a traditional sealing and cutting machine are unreasonable in layout and uneven in stress are solved.

This invention belongs to the field of rubber preparation technology, specifically relating to an anti-creep EPDM insulation material, its preparation method, and its application in integrated cables. By optimizing the ratio of EPDM rubber substrate with reinforcing agents, anti-creep agents, compatibilizers, and other components, combined with a specific preparation process, this invention significantly improves the material's anti-creep performance, wide-temperature-range insulation stability, mechanical strength, and compatibility. This material is suitable for ultra-deep vibratory-impact integrated cables and has broad application prospects.

The utility model provides a water conservancy project channel anti-seepage reinforcing structure, which belongs to the technical field of water conservancy channels and comprises a U-shaped butt joint block connected to a connecting seam of two channels to be in butt joint. The rubber plates are embedded in the positions, attached to the two channels, of the two sides of the butt joint block. The reinforcing blocks are in a hook shape and are fixedly arranged at the positions of the bottom walls of the two sides of the butt joint block, the hook head portions of the hook shapes face upwards, hook grooves matched with the reinforcing blocks are formed in the two butt joint channels, clamping blocks are fixedly arranged on the bottom walls of the hook grooves, clamping grooves matched with the clamping blocks are formed in the reinforcing blocks, and the clamping blocks are clamped in the clamping grooves. The outer side plate is in a U shape and is fixedly arranged on the outer side of the butt joint block, and the outer side plate extends to be connected to the outer side walls of the two channels in a supported mode. The connection strength of the prefabricated module channel can be enhanced, and the anti-seepage performance can be improved.

The application provides a rare earth-titanium-boron composite vacuum seal welding high-density cored wire and a preparation method thereof, and belongs to the technical field of metallurgical auxiliary materials. The preparation method comprises the following steps: weighing lanthanum-cerium rare earth alloy powder, titanium powder and boron powder for batching, and then uniformly mixing under a protective atmosphere to obtain mixed powder; filling the mixed powder into a low-carbon steel cylinder after pretreatment under a protective atmosphere, and then preliminarily sealing to obtain a composite blank; performing a reduction reaction on the composite blank in hydrogen, and then performing seal welding under a vacuum condition to obtain a composite blank after vacuum seal welding; heating the composite blank after vacuum seal welding, and then performing hot drawing to obtain the cored wire. The cored wire provided by the application realizes stable composite addition of rare earth, titanium and boron with high recovery rate, and significantly improves the structure and performance of 20Mn2 steel and the like, and solves the problems of cold heading cracking, insufficient toughness and aging embrittlement.

This utility model discloses an auxiliary support mechanism installation device for the assembly of a cylinder. The device is located below the support mechanism and prevents the five support mechanisms below the cylinder from automatically falling off due to gravity. The auxiliary support mechanism installation device is equipped with a foot-operated quick lifting mechanism to reduce the bending action of the operator and reduce the labor load. This device can replace the traditional elastic rope fixing support mechanism, reducing the number of operators from two people to one person to assemble one support mechanism. The efficiency is increased by 200% compared with the original elastic rope fixing, and the support mechanism pins are prevented from scratching the heat protection layer on the surface of the cylinder due to the small installation space.

This invention relates to the technical field of low-smoke halogen-free flexible busbar products, and discloses a low-smoke halogen-free flexible busbar including a busbar and an insulating sleeve. This low-smoke halogen-free flexible busbar utilizes a movable component. When a damaged insulating sleeve needs to be replaced, a sliding plate is operated to slide within a retaining sleeve. The sliding plate drives the insertion shaft to move, and the insertion shaft inserts into the interior of a limiting block. When the insertion shaft moves to a groove in the limiting block, a telescopic rod inside the movable shaft resets under the action of a fixed spring, causing the insertion rod to reset and be fixed inside the limiting block. This creates conditions for subsequent installation of a new insulating sleeve. When the insulating sleeve is damaged, it can be quickly replaced and re-fixed, preventing air, moisture, or dust from entering the busbar surface, avoiding problems such as reduced insulation resistance and partial discharge caused by external media corrosion, extending service life and improving replacement efficiency.

This utility model discloses a shower faucet panel mounting structure, comprising a faucet housing, a storage panel, and several connecting pieces. The connecting pieces are fixedly connected to the lower surface of the storage panel. An installation cavity is formed within the faucet housing, and the storage panel is installed at the upper opening of the installation cavity. Several protruding first transverse locking blocks are formed on the inner wall of the upper opening of the installation cavity. Transverse locking grooves are formed on the connecting pieces. Each of the first transverse locking blocks has a clearance space on the same transverse side for the connecting pieces to enter the installation cavity from top to bottom. The first transverse locking blocks and the transverse locking grooves are engaged in a transverse direction. Compared with the prior art, this utility model, by setting the transverse locking grooves on the connecting pieces to the first transverse locking blocks on the faucet housing for transverse engagement, makes the assembly and disassembly of the storage panel from the faucet housing simpler and more convenient.

The utility model discloses an egg transport case relates to egg transport technical field, including box, upper support, lower support and snatchs, the inner wall fixed connection of box has three groups and is distributed in the slide rail of up and down, the top of upper support and the bottom of lower support all are equipped with rubber frame, the opposite surface of upper support and lower support all interval spacing is equipped with and places the groove, snatch includes four equal interval distribution's snatchs, the surface fixed connection of disc has spring, the inside bushing of spring has the central shaft, one end fixed connection of central shaft has the connecting disc, one end rotation connection of snatch in one side of connecting disc. The egg transport case, through the cooperation of upper support, lower support, slide rail and bottom plate, can form independent space between every egg, reduce the collision between egg, and the bottom plate can slide in the slide rail, can better take egg support, improve the efficiency of egg transport storage step.

The application relates to a method for generating a multi-stage slope of earthwork of a building model, which comprises the following steps: acquiring a bottom contour line of an earthwork entity and multi-stage slope data corresponding to each side, determining the outward expansion distance of each side at different heights based on the multi-stage slope data, for any target side, if there is a slope at a certain height on the other side except the target side, the outward expansion distance of the target side at the height is calculated through linear interpolation, the bottom contour line is outwardly expanded layer by layer according to the outward expansion distance corresponding to each height, a plurality of planar contours at different heights are obtained, a slope surface corresponding to each side is generated based on the planar contours of adjacent heights, and the intersecting surfaces in the slope surface are cut to obtain a complete earthwork slope model. Through the application, the problem of topological error under different numbers of steps is solved, the outward expansion values of different slope sides at the same height are supplemented through linear interpolation, self-intersection is eliminated, and surface cutting is performed, so that the slope surfaces are continuously connected, without gaps and misplacement.

The utility model relates to the technical field of aluminum heat insulation film blankets, and discloses a flame-retardant foam aluminum heat insulation film blanket structure which comprises an aluminum heat insulation film blanket body, the two sides of the aluminum heat insulation film blanket body in the length direction are fixedly connected with a clamping table and a clamping opening matched with the clamping table respectively, and the side wall of the clamping opening is fixedly connected with a limiting table. The aluminum heat insulation film blanket body comprises a casting layer, an upper buffer layer, an upper aluminum foil layer and an upper fireproof layer are sequentially arranged on the upper surface of the casting layer, and a lower buffer layer, a lower aluminum foil layer and a lower fireproof layer are sequentially arranged on the lower surface of the casting layer. According to the aluminum heat insulation film blanket, during laying, the clamping openings are clamped to the clamping tables, the limiting tables are clamped to the limiting grooves, connection between every two adjacent aluminum heat insulation film blanket bodies can be completed, the laid aluminum heat insulation film blanket bodies are attractive and neat, no gap exists between every two adjacent aluminum heat insulation film blanket bodies, and the heat insulation effect is good. And the protection effect after the aluminum heat insulation film blanket body is installed is improved.

This utility model discloses an external circulation ventilated curtain wall, including a mounting frame. An outer curtain wall and an inner curtain wall are respectively mounted on two opposite sides of the mounting frame. A rotating window is movably mounted on the inner curtain wall. An external circulation component is connected to the top and bottom of the mounting frame. The external circulation component includes a ventilation hood. A ventilation opening is provided on the side of the ventilation hood facing the outer curtain wall. A filter box is slidably installed between the ventilation hood and the top of the mounting frame. A cavity is provided inside the side of the ventilation hood facing the inner curtain wall. A lifting plate is provided in the cavity. A rotating wheel is rotatably connected to the bottom of the lifting plate. The lifting plate is raised upward as the filter box is pulled outward. In this utility model, the filter box and the ventilation hood are connected by a slidable connection. With the ramp and rotating wheel in the track groove, the filter box can be easily disassembled without additional tools when it is pulled out. During installation, the lifting plate is manually raised. After the filter box is inserted, the spring returns, ensuring that the filter box fits tightly with the mounting frame, balancing sealing and ease of disassembly.

This utility model relates to the field of municipal pipeline installation technology and discloses a connecting device for municipal pipeline installation, including a first connecting ring and a second connecting ring. A convex ring is provided on the inner surface of the inner sleeve, and a spring is installed on the upper surface of the convex ring. The other end of the spring is installed on the lower surface of the cover plate. This utility model eliminates the traditional threaded connection method, replacing it with bolts that fix the pipeline to the first and second connecting rings. The conical surface of the connecting rod compresses the ball bearings, forcing them to abut against the inner wall of the outer sleeve. This converts the radial pressure into axial displacement of the inner sleeve and compresses the spring. The spring's reaction force is transmitted back to the ball bearings through the convex ring, forming a radial multi-point locking of the connecting rod. Simultaneously, the mechanical locking of the top plate by the fixing plate achieves axial constraint, ensuring that the connecting rod remains without gaps or displacement within the mounting hole under long-term vibration conditions, thus solving the problem of increased fit clearance and separation caused by water hammer effect.

This invention discloses a sealing structure for an electrolytic cell and an electrolytic cell. The sealing structure includes a pressure plate, electrodes, a diaphragm, and a gasket. The pressure plate includes a first step, a second step, and a third step, which respectively match the contact portions of the electrodes, the diaphragm, and the gasket. The sealing structure provided by this invention allows the pressure plate to completely fit against the contact portions of the electrodes, the diaphragm, and the gasket without gaps, reducing the risk of cross-contamination of media between the two sides of the electrolytic cell chamber.

The invention discloses an automatic seedling tray continuous conveying and tray arranging device and a tray arranging method thereof. A conveying mechanism is arranged at the front end of a rack, a supporting frame in a switching mechanism and the rack form a sliding pair, a U-shaped switching disc and the supporting frame form a sliding pair in the vertical direction, and the U-shaped switching disc and the supporting frame are arranged at the output end of the conveying mechanism; two mounting plates in the disc dividing mechanism are fixed at the rear end of the rack, and two disc dividing screw rods which are vertically arranged are hinged to each mounting plate; supporting and positioning mechanisms are arranged on the two mounting plates, two first chain transmission mechanisms are arranged in the supporting and positioning mechanisms at intervals, and two stop blocks arranged at intervals are fixed to a chain of each first chain transmission mechanism; and a lifting platform in the lifting bearing mechanism is arranged between the two mounting plates and is driven by a lifting mechanism to lift. According to the invention, the continuous tray placing operation of the seedling trays can be realized, the machine does not need to be stopped, and the seedling tray placing efficiency is relatively high.

The utility model relates to detection device technical field, concretely relates to a kind of automobile parts air tightness detection device, including detection workbench and the air tightness detection mechanism being set on detection workbench, the upper end of the detection workbench is fixedly installed with support plate at both sides, the upper end of the detection workbench is placed with automobile fuel pipe, the inside fixed sleeve of the support plate is connected with connecting barrel, one end of the connecting barrel is provided with air inlet valve, sealing fixed component is provided between the connecting barrel and automobile fuel pipe, the radial sealing fixation of fuel pipe is realized by sealing fixed component, compared with traditional mode relies on artificial with the help of sleeve ring and other tools fuel pipe end and air inlet valve pipe end clamping fixed situation, avoid the clamping connection of air inlet valve pipe end and fuel pipe end to appear gap, prevent causing gas leakage, to avoid causing automobile fuel pipe air tightness detection result inaccurate.

The utility model provides a kind of aluminium alloy door and window with high sealing performance. Including: installation track and alloy frame, two the side of mutually close alloy frame is respectively fixed with lock catch and hook, and lock is realized by lock catch and hook clamping, the side of mutually close alloy frame is fixed with sealing strip, two sealing strips are tightly attached by physical contact, ensure that there is no gap between the sealing strip of two alloy frames, to prevent rainwater etc. From entering;The position of installation track upper and lower sides and alloy frame close is fixed with baffle, the side of baffle and alloy frame attachment is higher, rainwater will be discharged along baffle after falling on alloy frame and glass, reduce rainwater from the gap between aluminium alloy door and window and baffle infiltration;The bottom of installation track both sides is provided with drainage groove, and rubber plug is inserted on drainage groove, rainwater can be effectively collected and discharged by drainage groove, reduce rainwater accumulation in installation track.

The utility model provides a kind of top-mounted electric mixer with Morse connection chuck, it is related to electric mixer technical field, including shell, drive shaft, chuck, stirring paddle, the drive shaft includes shaft body, the shaft body is equipped with the through-hole of shaft that can be passed by stirring paddle, the shaft body is rotationally arranged in shell by bearing, the lower part of the shaft body is provided with outer Morse taper, the chuck is used to fix stirring paddle, the inner sleeve of the chuck is equipped with the inner Morse taper that is compatible with outer Morse taper.The top-mounted electric mixer with Morse connection chuck, chuck is connected between drive shaft by Morse taper, and the two are pressed together by Morse taper, compared with the mode of traditional screw fixation, chuck and drive shaft are connected closely, without gap, and coaxiality is good.No special custom-made parts are needed, the price is low, the cost advantage is big, and the product application range is wide.

The utility model relates to the technical field of thermal insulation pipe manufacturing, and discloses a PE winding and pressing mechanism for a prefabricated thermal insulation pipe. The prefabricated thermal insulation pipe PE winding and pressing mechanism is used for applying and pressing a PE sheet discharged from a PE machine head to the surface of a thermal insulation layer of a thermal insulation pipe and comprises a first cooling roller assembly, a second cooling roller assembly, a secondary pressing roller assembly and a third pressing roller assembly. The structural performance of the PE outer protective layer is remarkably improved, through continuous rolling of the two-time pressing roller assembly and the third-time pressing roller assembly, bubbles between layers of PE sheets are eliminated, and it is guaranteed that fusion between the layers is gapless. The multiple layers of PE sheets are fully fused into an integrated structure in the three-time pressing process, and the tensile strength is improved. Finally, the surface of the outer protective layer is smooth through the pressing roller, and the problems of edge warping and insufficient peeling strength are avoided.

The application discloses a kind of cabbage packaging film equipment and its packaging film method, including packaging device and film sealing device, the packaging device includes bottom disc fixing mechanism, lifting mechanism, film pulling mechanism and plastic film;The bottom disc fixing mechanism is used to carry cabbage, the film pulling mechanism is used to pull plastic film to be laid on the top of bottom disc fixing mechanism, the lifting mechanism is used to drive bottom disc fixing mechanism and the cabbage on it to move upwards, so that plastic film is closely attached to the spherical surface of cabbage;The film sealing device includes film melting mechanism and film sealing mechanism;The film sealing mechanism holds the bottom of cabbage before film melting mechanism fuses plastic film and pre-fixes the lower part of plastic film, after film melting mechanism fuses plastic film, continue to compress plastic film to seal cabbage.The application realizes the close attachment between cabbage and plastic film, reliable sealing, improves packaging quality and preservation effect by the cooperation of each mechanism.

This invention proposes a seepage-proof structure for hydraulic construction pipelines, comprising two end pipes, with a seepage-proof pipe jointly installed between them. A sealing device is fixedly connected to the inner wall of the seepage-proof pipe, and reinforcing devices are slidably installed at both ends of the seepage-proof pipe. Limiting devices are slidably connected to the side walls of the two end pipes at corresponding positions. Multiple grouting devices are installed through the side walls of the seepage-proof pipe. This invention has a reasonable structural design and offers the advantages of enhanced sealing performance and seepage prevention at the end pipe connections.

The utility model provides a kind of corrosion-resistant strong sealing double-shaft discharge chute, comprising: discharge chute main frame, the top of discharge chute main frame is equipped with feed inlet, feed inlet is used to support the material that modulator falls down, the side wall of discharge chute main frame is equipped with mixing opening, mixing opening can be connected the door cover of material preparation chamber, the bottom of discharge chute main frame is equipped with discharge port, material preparation chamber includes stirring device, stirring device can be stirred to the material that falls from feed inlet in door cover, the material that is stirred can be discharged from discharge port, first turnover assembly and second turnover assembly are rotatably connected in discharge chute main frame, second turnover assembly is above first turnover assembly, feeding tongue is installed on first turnover assembly, and feeding tongue can be matched with the gap of door cover. By setting up "double-shaft turnover assembly" structure, the double control and sealing function of discharge chute passage are realized, effectively solve the problem that traditional discharge chute is easily corroded under high humidity, acidity, chlorine-containing working condition.