119results about How to "Improve closure" patented technology

The invention relates to a multi-specification boxing and packaging mechanism for reels, which comprises a boxing frame, an annular transplanting guide rail module is mounted on the boxing frame, jigs for bearing paper boxes are mounted on the annular transplanting guide rail module, the jigs comprise small-size paper box jigs and large-size paper box jigs, and the small-size paper box jigs and the large-size paper box jigs are mounted on the annular transplanting guide rail module. A transplanting mechanical arm used for taking and placing a paper box, a reel disc assembling mechanical arm, a paper box cover closing and side lug folding module, a paper box label pasting module, a front side lug folding module and a paper box carrying mechanical arm are sequentially arranged on the boxing frame in the conveying direction of the annular transplanting guide rail module. The paper box carrying manipulator is matched with an adhesive tape sticking module, a finished product lifting platform and a defective product processing roller inclined surface, and each station of the annular transplanting guide rail module is matched with a clamping device for clamping a jig; the finished product lifting platform is matched with a large-size finished product conveying belt and a small-size finished product conveying belt. Carton jigs of different sizes are circularly conveyed by adopting the annular transplanting guide rail module, so that the carton jigs can sequentially pass through the corresponding stations to complete the boxing operation of the corresponding reels, the overall boxing and packaging efficiency is improved, and meanwhile, boxing and packaging of reels of different specifications can be completed at the same time.

The invention relates to an annular automatic packaging device for a reel disc, which comprises a boxing and covering mechanism for covering, labeling and adhesive tape pasting of a paper box and feeding of a finished product to a finished product transmission module, and the boxing and covering mechanism is matched with a reel disc feeding mechanism through an assembly manipulator and is matched with a paper box positioning mechanism through a transfer manipulator. The paper box positioning mechanism is matched with a box folding mechanism for folding the paper box into a vertical semi-finished paper box with an upper cover, the box folding mechanism is matched with a leatheroid feeding mechanism, and the leatheroid feeding mechanism is used for sucking leatheroid on a leatheroid pile and moving the leatheroid to the box folding mechanism and placing the semi-finished paper box with the folded box on the paper box positioning mechanism. The panel feeding mechanism is matched with an AGV trolley feeding device. According to the annular automatic packaging equipment for the reels, packaging is completed in the whole machine, a fixed mechanical arm is used for replacing a conveying belt to convey the reels and semi-finished paper boxes, and therefore the overall packaging efficiency is greatly improved.

The utility model relates to the technical field of ball valves, and discloses a ball valve flange sealing structure, which is characterized in that a connecting pipe seat is mounted on the side of a flange connecting seat through a sealing gasket seat matched with a fastening bolt, and the sealing gasket seat is respectively connected with the connecting pipe seat and the flange connecting seat in an embedded manner through sealing convex rings on the two sides of the sealing gasket seat; the sealing gasket seat is inserted and installed in the connecting pipe seat and the flange connecting seat in a stretching and embedded mode through the necking sleeve on the two sides, the sealing gasket seat serves as a sealing structure of the connecting position of the flange connecting seat, and the sealing protruding ring on the side of the sealing gasket seat is embedded and sealed with the sealing embedding groove in the connecting side of the flange connecting seat. The installation stability and the sealing effect of the sealing gasket seat can be effectively improved, the necking cylinder sleeves are arranged on the two sides of the sealing gasket seat, the necking cylinder sleeves are connected with the ring caulking grooves in the flange connecting seat in an inserted and embedded mode, the necking cylinder sleeves can stretch into and be sealed in the flange connecting seat, and therefore the sealing gasket seat is not prone to falling off. The water hydraulic pressure in the flange connecting seat can be used for pushing and sealing the connecting side of the necking sleeve, and the sealing effect of the valve body can be effectively improved.

The utility model discloses a 96-well plate capable of preventing cross contamination, which belongs to the field of 96-well plates and comprises a well plate and a well plate cover covering the well plate, ninety-six hole grooves distributed in a rectangular array are arranged on the inner side of the well plate, and the well plate cover covers the well plate. The hole plate cover comprises a transparent cover plate, a cover cap which is clamped on the transparent cover plate and is in contact with an opening in the top end of the hole groove, and a fence which sleeves the outer part of the hole plate and is clamped with the bottom of the transparent cover plate. According to the 96-well plate capable of preventing cross contamination, cross contamination of reagents is effectively prevented through the design of the well plate cover and the cap on the well plate cover, the hole grooves distributed in the well plate in a rectangular array mode are matched with the well plate cover capable of being connected in a covering mode, the internal situation can be observed through the transparent cover plate, and leakage of the reagents in each hole groove is avoided through the sealing design of the cap; the enclosure and the buckle structure ensure the firm fixation of the pore plate cover, and further enhance the closeness of the system.

The utility model discloses a laryngeal breather pipe which comprises a breather pipe body, a breather cavity and an esophagus drainage cavity are arranged in the breather pipe body, a laryngeal cuff and an esophagus cuff are arranged on the breather pipe body, and an air outlet of the breather pipe body is formed in the pipe wall of the pipe section, between the esophagus cuff and the laryngeal cuff, of the breather pipe body. The patient end of the breather pipe is connected with a soft head which can be conveniently inserted into the esophagus of a patient, a drainage hole communicated with an esophagus drainage cavity is formed in the soft head, the laryngeal cuff is arranged between the esophagus cuff and the machine end of the breather pipe, an esophagus drainage channel is formed in the outer wall of the breather pipe, and the esophagus drainage channel is communicated with the esophagus drainage cavity. And the esophagus drainage channel is communicated with the esophagus drainage cavity. The ventilation cavity and the esophagus drainage cavity are formed in the ventilation pipe, and the glottis is closed through the laryngeal cuff; the esophagus of a patient is sealed through the esophagus cuff, esophagus drainage is conducted on the patient, and reflux and aspiration are prevented.

The invention discloses an esophageal cancer local chemotherapy device, and belongs to the technical field of chemotherapy auxiliary equipment, the esophageal cancer local chemotherapy device comprises a sealing device, the sealing device comprises a drug delivery tube, the lower end of the drug delivery tube is fixedly connected with a zigzag mounting tube, and the side wall of the zigzag mounting tube is rotatably connected with a plurality of hinge connecting rods; the lower end of the zigzag mounting tube is fixedly connected with a closed collecting film fixedly connected with the upper ends of the hinge connecting rods, the interior of the zigzag mounting tube is slidably connected with a movable block, and the device can be tightly attached to the inner wall of the esophagus through unfolding of the closed collecting film to form an effective closed structure, so that the position of medicine at the focus is locked, and the medicine is prevented from being damaged. Therefore, the local treatment effect of the medicine can be improved, meanwhile, the medicine is prevented from flowing to the stomach along with natural physiological movement of the esophagus, stimulation to the digestive tract of a patient is reduced, meanwhile, the influence on normal tissue of the patient is reduced, precise treatment is achieved, and the health of the patient is protected to the maximum extent.

The assembly type ALC wallboard comprises ALC bricks, a transverse and longitudinal steel bar mechanism, a quick clamping mechanism and a clamping auxiliary mechanism, the transverse and longitudinal steel bar mechanism comprises a transverse steel bar, a longitudinal steel bar, a transverse sealing plate and a lateral sealing plate, and the quick clamping mechanism comprises a clamping pipe, a clamping rod, a locking rod, a locking spring, a locking head and a clamping groove. The clamping auxiliary mechanism comprises a rotating pipe, a moving groove, a transverse rod, a ball and a gradient block, the ALC bricks can be transversely and longitudinally connected through transverse steel bars and longitudinal steel bars, a stable wallboard structure is formed, wallboard units are allowed to be rapidly connected through the combined design of connecting rods and clamping pipes, the installation efficiency is improved, and the construction cost is reduced. And through cooperation of the rotating frame at the top of the rotating pipe and an external tool, the unlocking process is simpler and more convenient.

The utility model relates to a power distribution cabinet, in particular to a moisture-proof power distribution cabinet. The technical problem to be solved is to provide a moisture-proof power distribution cabinet which comprises a cabinet body, a protective door plate, a rainproof ceiling, a mounting rack and the like. The front side of the bottom in the cabinet body is provided with a wire inlet hole, the middle part of the right side wall of the cabinet body is provided with a wire outlet hole, the front part of the cabinet body is provided with a protective door plate, the top of the cabinet body is provided with a rainproof ceiling, and the middle parts of the left and right side walls in the cabinet body are provided with mounting racks. And mounting plates are sequentially and uniformly mounted between the two mounting frames from top to bottom at intervals. According to the power distribution cabinet, the plugging mechanism is arranged, the air pump is started, the air pump compresses air to enter the air cushion ring pipe, the rubber air cushion ring pipe expands to tightly seal the power distribution cabinet door, the sealing reinforcing effect is achieved, and through cooperation of the exhaust fan and activated carbon in the placing net frame, the effect that the replaced air is dry when wet air in the cabinet body is exhausted can be achieved.

The invention discloses an electric vacuum blackboard eraser, which belongs to the technical field of teaching tools, and comprises a gripping plate, a dust collecting box is detachably connected to the top of the gripping plate, a brush plate is movably installed on the top of the dust collecting box, multiple rows of bristles are installed on the top of the brush plate, multiple ash passing holes are provided on the brush plate, a dust filter is detachably installed on the bottom of the dust collecting box, multiple baffles cooperating with the ash passing holes are installed inside the dust collecting box, the baffles are obliquely installed on the inner wall of the dust collecting box and can rotate, a fan is installed inside the gripping plate, a switch is installed at one end of the gripping plate, and multiple exhaust holes are provided at the bottom of the gripping plate. The invention can collect scattered dust during use, reduce the harm of dust to teachers and students, and at the same time, it also has high sealing when not in use, and will not cause the dust collected inside the dust collecting box to leak, thereby reducing the pollution of secondary dust.

A reusable temporary sealing device for post-cast strips includes a metal cover plate, a keel frame, a sleeve, and a lifting and fixing rod. The keel frame is welded above the reinforcing bars of the post-cast strip. A through-hole sleeve is vertically installed at the center of the keel frame. The metal cover plates are placed one by one above the upper keel frame of the post-cast strip according to the positioning lines. The connecting parts of the metal cover plates are processed into insert-shaped folded edges. The metal cover plates are connected at the insert-shaped folded edges by C-shaped flat inserts. After connection, a continuous U-shaped weather-resistant rubber strip is installed on the side of the metal cover plate. The metal cover plate is attached to the keel frame and connected by electric welding. A lifting and fixing rod is installed inside the sleeve. The bent part of the lifting and fixing rod hooks to the reinforcing bars of the post-cast strip. The threaded section of the lifting and fixing rod extends upward from the sleeve. This utility model uses a steel keel and metal cover plate structure, which is sturdy, durable, and highly safe. The sealing plate uses a snap-fit ​​connection, and the edges are made of rubber and pre-pressed to fit the structural surface, making it highly adaptable to the field and providing high sealing performance.

The multifunctional composite sputum scraping structure of the sputum suction pipe connecting seat comprises the sputum suction connecting seat, and the sputum suction connecting seat comprises a cleaning chamber, a sputum suction connecting end and a catheter connecting end; a blocking circular ring is arranged at the joint of the cleaning chamber and the catheter connecting end, a blocking valve is arranged at the joint of the cleaning chamber and the sputum suction connecting end, a sputum scraping part is arranged on the surface of the inner side wall of the blocking valve in a protruding mode and comprises a plurality of protruding blocks, and the protruding blocks are enlarged in the direction close to the center of the blocking valve. By arranging the blocking valve, the air tightness and the sealing performance of the cleaning chamber are improved, sputum adhered to the outer wall of the catheter is scraped off and retained in the cleaning chamber through the blocking circular ring and the sputum scraping part, and therefore the sputum is convenient to clean, and the protruding block is gradually enlarged in the direction close to the center of the blocking valve; therefore, most of the convex blocks can tightly abut against the outer wall of the catheter when the catheter passes through, the effect of scraping sputum on the surface of the catheter is enhanced, potential safety hazards of a patient are reduced, the sealing performance of the blocking valve can be enhanced, and the blocking valve is adaptive to catheters of different sizes.

The utility model discloses a processing heat treatment material receiving device which comprises a bottom plate and a recycling box, vertical plates are fixed on two sides of the top end of the bottom plate, a threaded rod is installed at the position between the vertical plates and close to the top end, a ball is embedded in an embedding groove, and a reserved groove is formed in the top end of the bottom plate. The vertical plates are installed on the two sides of the top end of the bottom plate, the reserved groove is formed in the top end of the bottom plate, at the moment, the servo motor can drive the threaded rod to rotate after working, at the moment, the threaded rod and the threaded block are matched with each other to form transverse movement, and the sliding block is fixed to the bottom end of the threaded block; the sliding block is fixed to the guide rail, so that linear guiding work is formed after the sliding block and the guide rail are matched with each other, the supporting block is fixed to the bottom end of the sliding block, the balls make contact with the inner wall of the reserved groove during linear movement, at the moment, the balls correspondingly roll in the caulking groove, and therefore in the working process, linear transportation is carried out, and meanwhile linear guiding work is achieved. And the overall supportability is better improved.

The utility model relates to a filtering device for amitraz production, which comprises a frame body, a filtering box is fixedly connected in the frame body, a feeding pipe is fixedly connected at the top of the filtering box, a transmission mechanism is arranged at the top of the frame body, a backflow preventing mechanism is arranged in the feeding pipe, and a backflow preventing mechanism is arranged in the backflow preventing mechanism. The backflow preventing mechanism comprises a fixing table fixedly connected to the interior of the feeding pipe, a blocking block is slidably connected to the interior of the fixing table, supporting plates are fixedly connected to the interior of the feeding pipe, and an electric push rod is fixedly connected to the top of the supporting plate on one side. According to the filtering device for amitraz production, through the matched design of the fixing table and the blocking block and the synergistic effect of the electric push rod and the telescopic sleeve, the feeding pipe can be rapidly and accurately closed after materials are conveyed, and amitraz powder is effectively prevented from flowing back to a conveying pipeline on the upper layer of the feeding pipe due to the influence of gravity or airflow; due to the design of the blocking block with the trapezoidal section and the fixing table, the sealing effect is further enhanced, and the reliability of backflow prevention is ensured.

This invention provides a valve prosthesis, comprising: a valve stent, leaflets, and a leaflet connector; the valve stent has a support rod; the leaflet connector includes a folded portion and a connecting portion, the folded portion being used to fold and accommodate the support rod; the connecting portion extends from both ends of the folded portion, and the connecting portion connects to the leaflet, such that the leaflet is connected to the support rod through the leaflet connector. This design improves the leaflet closure and the connection stability between the leaflet and the valve stent, thereby enhancing the overall stability of the valve prosthesis under complex operating conditions.

The application discloses a cold air machine air inlet water blocking structure and a cold air machine. The cold air machine air inlet water blocking structure comprises side plates arranged on both sides of an air inlet of a cabinet body, at least one water blocking plate connected between the two side plates, a heating pipe installed on an end surface of the water blocking plate away from the air inlet, and at least one closing plate connected between the two side plates. The closing plate is arranged on the side of the water blocking plate away from the air inlet, and a heating cavity for accommodating the heating pipe is formed between the closing plate and the water blocking plate. When defrosting operation is performed, the heating pipe can effectively defrost frost layers condensed on the surface of the water blocking plate, and the defrosting efficiency is improved.

The present invention relates to the field of medical technology. The purpose is to provide a self-fixing vascular catheter for battlefield ex vivo tissue perfusion and preservation, comprising a catheter body with an insertion end at one end and a connection end at the other end, the connection end of the catheter body is provided with a pipe joint for connecting to a perfusion tube, and the outer surface of the middle section of the catheter body is provided with a closed water bag that can close the blood vessel after expansion; a water injection joint is also provided on the side wall of the catheter body between the closed water bag and the pipe joint, and the water injection joint is connected to the closed water bag through a water injection pipe. The present invention can be conveniently and quickly fixed on the blood vessels of ex vivo tissues so as to perform remote perfusion of preservation fluid on three-dimensional tissues, which can significantly improve the preservation time limit of ex vivo tissues and the subsequent replantation success rate.

This invention belongs to the field of accessory painting, specifically relating to an accessory painting mold and its usage method. The accessory painting mold includes a housing with a cover plate connected to its top. A placement plate, a painting mechanism, and a rotating mechanism are installed on the side of the housing. The placement plate is rotatably connected to the inside of the housing for fixing the accessory. The painting mechanism includes a pump body and a spray plate fixedly installed inside the housing. The rotating mechanism includes a threaded post and a connecting plate. Compared with the prior art, this invention, through the cooperative connection between the cover plate and each component, allows the accessory to be painted in a sealed space, thereby effectively improving the working environment. It also allows for rapid connection and positioning between the connecting post and the placement plate, improving the loading and unloading efficiency of electronic components. Furthermore, it allows for rapid flipping of electronic components during the painting process, effectively improving painting efficiency.

The invention discloses a sump leakage stoppage method which comprises the following steps: vertically arranging a drain pipe in a sump, and discharging accumulated water in the sump out of the sump; sludge at the pit bottom of the water collecting pit is removed; pouring pre-pouring quick-setting cement at the pit bottom of the sump, wherein the pre-pouring quick-setting cement covers the lower end of the drainage pipe; after the pre-cast quick-setting cement is hardened, the drainage pipe is dismantled; post-pouring quick-setting cement is poured into the hole after the drainage pipe is detached, and the post-pouring quick-setting cement and the pre-pouring quick-setting cement are solidified to form a quick sealing layer; a reinforcing steel bar layer is erected on the quick sealing layer, and the ends of reinforcing steel bars of the reinforcing steel bar layer are implanted into the pit wall of the sump; and anti-seepage micro-expansion concrete is poured on the quick sealing layer, and the anti-seepage micro-expansion concrete wraps the steel bar layer to be solidified to form a sealing layer. The problem that an existing plash leakage repairing method is poor in leakage stopping effect is solved.

The utility model belongs to the field of medical instruments, particularly relates to an enterostomy fixing device, and aims to solve the problems that the existing enterostomy of a patient needs to be cleaned regularly and frequently, the patient often excretes during cleaning when medical staff clean the enterostomy, excrement is easy to splash out, and the cleaning effect is poor. In order to solve the problems that medical staff and the surrounding environment are polluted, and the using effect is reduced, the following scheme is provided: the device comprises a positioning ring, and the interior of the positioning ring is in threaded connection with two threaded rods; the blocking and protecting assembly is arranged on the positioning ring and is used for blocking and protecting excrement of the patient; and the fixing assembly is arranged on the positioning ring and used for fixing the positioning ring. When in use, the excrement of a patient can be blocked and protected, and the phenomenon that the excrement is splashed out when the patient excretes and pollutes medical staff and the surrounding environment is prevented.

This application provides a mine water blocking device, including a triggering component, a supporting component, a locking component, and a main frame. The triggering component includes a trigger head, a trigger rod, and a counterweight rod. The counterweight rod is sleeved on the outside of the trigger rod, and the trigger rod can move along the inner wall of the counterweight rod. The main frame is hinged to the top of the counterweight rod. The supporting component includes a supporting bone and a movable disc. The supporting bone is connected to the main frame, and one end of the supporting bone is hinged to the edge of the movable disc. The movable disc is sleeved on the outer wall of the counterweight rod. The locking component is disposed inside the movable disc. The movement of the trigger rod triggers the locking component. The movable disc has an open state that unfolds the main frame and a closed state that retracts the main frame. The movement of the trigger head and the trigger rod unlocks the locking structure, causing the movable disc to move, the main frame to unfold, and a water blocking wall to be quickly formed. After the water blocking device is unfolded, the counterweight rod can fall at an angle to the water surface, allowing the main frame to form a skeleton structure, providing a higher support effect for the formation of the water blocking wall.

The invention relates to the field of electronic tray packaging equipment, in particular to a cover closing mechanism for reel tray packaging, which comprises a conveying line for conveying a paper box jig, a paper box with a reel tray and a vertically upward box cover is placed on the paper box jig, and the conveying line is sequentially matched with a paper box cover closing and side lug folding module and a front side lug folding module in the conveying direction. The paper box cover closing and side lug folding module is used for inwards folding side lugs of a box cover and pushing down and flatly placing the vertical box cover so that the side lugs can be located in the box, and the front side lug folding module is used for bending side lugs on the front box face of the flatly-placed box cover, inserting the side lugs into the box body and enabling the front box face to be tightly attached to the front side of the box body. According to the carton cover closing and side lug folding device, the carton cover closing and side lug folding module and the front side lug folding module can be matched with a conveying line to complete cover closing of cartons in two stations, cover closing can be conducted on the cartons of different sizes and specifications, the carton cover closing and side lug folding module and the front side lug folding module can work on the cartons of the two stations at the same time, and compared with manual cover closing equipment or cover closing equipment of a single station, the cover closing efficiency is higher.

The utility model discloses an openable smoke dust sealing cover plate, and belongs to the technical field of metal smelting, the openable smoke dust sealing cover plate comprises a main body cover plate and an auxiliary cover plate which are used for sealing the top of a metal slag ditch, the auxiliary cover plate is used for being spliced with the main body cover plate, a joint of the main body cover plate and the auxiliary cover plate at the splicing position is a bending joint, and the main body cover plate and the auxiliary cover plate are sealed at the joint; when the metal slag channel is closed, the main body cover plates and the auxiliary cover plates are arranged in a staggered mode in the arrangement direction of the metal slag channel, and when the metal slag channel needs to be opened, the auxiliary cover plates can be separated from the main body cover plates so that the intervals between the adjacent main body cover plates can be exposed. An existing cover plate structure can be optimized, ditch checking and ditch cleaning operation can be facilitated, a certain smoke dust sealing effect can be kept, the purposes of environmental protection and safe tapping are finally achieved, and meanwhile in the slag iron ditch maintenance work, the hoisting workload can be remarkably reduced, and the hoisting efficiency can be improved.

The utility model discloses meat product vacuum packaging equipment, which relates to the technical field of meat product processing and comprises a rack, rotating connecting rods are rotatably mounted on two corresponding sides of the rack, and a vacuum top cover is rotatably mounted on the rotating connecting rods. Two containing grooves matched with the vacuum top cover are formed in the top face of the rack, and a plurality of packaging mechanisms are arranged in the containing grooves. According to the vacuum packaging equipment for the meat products, the packaging mechanism arranged in the containing groove is utilized, the pulling piece on the heat sealing plate can pull the packaging bag, and therefore the effect that the packaging bag can be driven to be flattened is achieved, and the situation that due to the fact that an opening of the packaging bag is not flat, the packaging bag is not flat is avoided as much as possible. According to the vacuum packaging equipment, the situation that the vacuum packaging is affected is avoided, the sealing effect of meat product packaging is improved, the packaging efficiency is improved, and meanwhile the practicability of the vacuum packaging equipment is improved.

The embodiment of the invention discloses a modular totally-closed intelligent goaf spontaneous combustion monitoring method which comprises the following steps: injecting slurry foam into a goaf to wrap a coal body; a formwork is arranged at the preset position of the roadway, filling materials are arranged, and the filling materials are injected into a cavity of the formwork to form a sealing wall so as to seal the goaf; a sensing system is arranged on the closed side of the goaf and used for monitoring the temperature and gas of the goaf and collecting field images of the goaf. The method is suitable for occasions of rapid sealing and intelligent monitoring of the spontaneous combustion goaf.

The utility model discloses a water conservancy construction intercepting device, and relates to the technical field of water conservancy intercepting, the water conservancy construction intercepting device comprises a limiting support and a supporting assembly, the supporting assembly provides auxiliary support for an intercepting plate and optimizes stress distribution, stress is decomposed and transmitted through the auxiliary support, so that the force borne by each supporting part is relatively small, and the supporting assembly is arranged on the limiting support. The situation that local stress is too large is avoided, the stability of the intercepting plate is enhanced, the intercepting effect is guaranteed, the supporting assembly can form a folding structure through a plurality of shafts, transferring is convenient, and space is saved; after a limiting support is fixed, multiple sets of connecting plates are inserted into clamping grooves, a rotary supporting frame is parallel to the ground, and a supporting sleeve rod and an auxiliary supporting rod are rotated; a second screw rod penetrates through the connecting plate and is in threaded connection with the intercepting plate to provide top support; an auxiliary support rod is attached to the connecting plate; a third screw rod penetrates through the connecting plate and is in threaded connection with the intercepting plate to provide middle support; and a fourth screw rod penetrates through the fixing frame and is connected with the ground to provide bottom support.

The invention belongs to the field of 3D printing nozzles, and discloses a 3D printing nozzle for printing a polluted site barrier and a printing method, which can realize synchronous rapid carbonization and printing construction of a printing material, form a composite barrier with a relatively high sealing effect, and remarkably improve the emergency disposal efficiency of an emergent site soil groundwater pollution event. The 3D printing nozzle comprises a shell, a hollow first stirring shaft, a hollow second stirring shaft, a power source and an air source. A feeding hole, a discharging hole and an air injection hole are formed in the shell; second stirring blades are arranged on the outer wall of the second stirring shaft, the first stirring shaft is sleeved with the second stirring shaft, first stirring blades are arranged on the outer wall of the lower portion of the first stirring shaft, and gas dispersion holes are formed in the wall face of the lower portion of the first stirring shaft; the power source drives the first stirring shaft and the second stirring shaft to rotate; the air source is respectively connected with the hollow cavity of the first stirring shaft and the air injection hole.

The utility model discloses an elastic metal hard sealing high-performance butterfly valve, and relates to the technical field of butterfly valves, the elastic metal hard sealing high-performance butterfly valve comprises a valve body, a valve seat and a valve plate, the valve seat is sleeved in the valve body, the valve plate is arranged in the valve seat, the front side surface of the valve plate is fixedly connected with a valve shaft, and the valve shaft is fixedly connected with the valve seat. The valve shaft is rotationally connected with the inner wall of the valve seat, an arc-shaped groove is formed in the inner wall of the valve seat, an elastic metal ring is fixedly connected to the inner wall of the arc-shaped groove, the elastic metal ring is conical, and a first mounting ring is fixedly connected to the inner wall of the valve seat; a through groove extending out of the rear side surface of the first mounting ring is formed in the front side surface of the first mounting ring, the sealing performance of the valve plate can be improved by means of elasticity of the elastic metal ring when the valve plate is closed, meanwhile, the sealing performance of the valve plate can be further improved by means of the sealing pressing ring, leakage is avoided, and meanwhile the elastic metal ring is arranged in a conical shape. And the resistance when the valve plate is closed can be effectively reduced.

The utility model discloses a dustproof plate of a mold, and relates to the technical field of dustproof plates of molds. The dustproof plate of the mold comprises a base and a connecting mechanism, a first dustproof plate and a second dustproof plate are arranged above the base, the connecting mechanism is located on the base, a third dustproof plate is arranged above the base, and a sealing gasket is installed at the bottom of the third dustproof plate in a welded mode. Through cooperative use of the bidirectional threaded rod, the handle, the first connecting block and the second connecting block, the mold dustproof device can adapt to the width of a sealing gasket, so that the first dustproof plate, the second dustproof plate and the sealing gasket can be kept attached, the dustproof sealing performance of the mold is improved, and the using effect is improved to a certain extent; and through cooperative use of mounting clamping grooves, mounting clamping blocks, sealing gaskets and connecting rods, the mounting clamping grooves in the first dustproof plate and the second dustproof plate and the mounting clamping blocks on the third dustproof plate are mounted in a clamped mode, and therefore the connecting stability of the third dustproof plate, the first dustproof plate and the second dustproof plate is improved.

The utility model discloses a sampling device for chemical waste gas detection, relates to the technical field of chemical waste gas detection, and aims to solve the technical problems that when a plug of the current sampling device is pulled out of an opening of a waste gas storage tank, external air enters, a waste gas sample is diluted, and the detection accuracy is influenced. Comprising a sampling pipe and an air exhaust rod installed in the sampling pipe, a sampling head is fixedly installed at the lower end of the sampling pipe, a plugging piece for plugging an opening of the sampling head is fixedly installed in the sampling pipe, the sampling head comprises a connecting pipe, and a communicated insertion pipe is integrally formed at the lower end of the connecting pipe; according to the utility model, through the matching of the sampling head and the plugging piece, when the sampling head is inserted into the opening of the waste gas tank, the convex block drives the baffle plate to move upwards through the extrusion of the pipe opening, so that the plugging plate is pushed to move upwards to be separated from the bottom of the inner cavity of the connecting pipe, and the communication effect is achieved; and the exhaust gas extraction sealing performance is improved.