377results about How to "Easy loading" patented technology

The invention belongs to the technical field of bar production, and particularly relates to a production method of a steel bar for a heavy-load automobile half axle, and the steel bar comprises the following chemical components in percentage by mass: 0.39-0.42% of C, 0.25-0.35% of Si, 1.45-1.70% of Mn, less than or equal to 0.013% of P, less than or equal to 0.006% of S, less than or equal to 0.25% of Cr, less than or equal to 0.25% of Ni, 0.15-0.20% of Mo, 0.06-0.10% of V, less than or equal to 0.15% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that high-performance, high-purity and low-cost production of the steel bar for the heavy-duty automobile half shaft is realized through green short-process production of'ecological electric furnace + LF + RH + continuous casting 'in combination with low-carbon component design and a controlled rolling and controlled cooling process. And macrostructures and non-metallic inclusions of the finished steel meet the requirements of high-end products.

The utility model discloses a kind of servo terminal machines, including support, the front end of the support is provided with processing mesa, the upper end of the support is fixedly installed with servo electric cylinder, the lower end of piston rod in the servo electric cylinder is connected with upper die, the upper part of the processing mesa is fixedly installed with lower die, the lower die is below upper die, the bottom of the outer surface of the support front end is equipped with mounting groove, reciprocating feeding structure is installed in the mounting groove, the front end of reciprocating feeding structure is connected with support feeding structure, and reciprocating feeding structure includes guide ring, first guide rod, air cylinder and fixed plate. A kind of servo terminal machine is disclosed in the utility model, and reciprocating feeding structure and support feeding structure are set, workpiece is conveniently fed, the hand of staff is away from the position of upper die and lower die, the security of operation is improved, and the wire is fixed by the setting wire fixing clamp, the stability of feeding is improved.

The application discloses an alkylation device with a circulating refrigerant impurity removal function, which comprises an alkali washing assembly, a water washing assembly, a depropanizing tower and a deisobutane tower; the alkali washing assembly and the water washing assembly are connected in series on a circulating refrigerant feeding conveying pipe; a water washing assembly discharge port is in pipeline communication with a depropanizing tower feeding inlet; and a depropanizing tower lower discharge port is in pipeline communication with a deisobutane tower feeding inlet. The device can remove SO2, sulfides such as mercaptans and free water in the circulating refrigerant of the alkylation device, thereby effectively reducing the plugging frequency of the depropanizing tower, improving the propane removal efficiency of the alkylation device system, avoiding the increase of the content of propane in the system, maintaining a better alkylene ratio in the circulating material and improving the quality of the obtained isooctane product.

The utility model relates to a damping type server case which comprises an outer case body and an inner frame body arranged in the outer case body, a gap is formed between the inner frame body and the outer case body, the inner frame body is defined by an inner bottom plate, an inner right side frame and an inner rear side frame, the inner bottom plate and the outer case body are supported through a plurality of sets of bottom damping pieces, and the bottom damping pieces are arranged in the outer case body. An L-shaped inner support is further arranged on the side, away from the inner right side frame, of the inner bottom plate, one end of the inner support is connected with the inner bottom plate, the other end of the inner support is connected with the top of the inner rear side frame, and the inner right side frame, the top of the inner support and the outer box body are supported through multiple sets of top damping pieces. The gap is formed between the outer box body and the inner frame body, and the damping pieces are arranged on the upper side and the lower side of the outer box body to conduct damping protection on the components on the inner frame body, so that the possibility that the components are damaged is reduced, and the stability of the server in the using process is guaranteed.

The utility model belongs to the technical field of cold heading machines, and particularly relates to a ball head rod cold heading device which comprises an outer cage, a ball head rod cold heading machine, a ball head rod cold heading machine, a ball head rod cold heading machine and a ball head rod cold heading machine. A conical channel is formed in the main body, the main body is arranged in the cavity, and the small end of the conical channel is opposite to the closing opening; the movable mold comprises a first mold body, a second mold body and a clamping piece, the first mold body and the second mold body are both arranged in the conical channel, and a machining area is formed between the first mold body and the second mold body; the driving mechanism comprises an extrusion assembly and a push-out assembly, the extrusion assembly is arranged at the front end of the main body, and the push-out assembly is arranged at the rear end of the main body; wherein the material is connected into a machining area between the first die body and the second die body from the front end of the main body, the extrusion assembly abuts against the end, located at the front end of the main body, of the material, and the push-out assembly penetrates through the closing opening into the cavity and extends into the machining area.

The embodiment of the application provides an insulating film and a battery cell, and belongs to the technical field of battery manufacturing. The insulating film comprises: an insulating film body; a crease line group, the crease line group is arranged at intervals on the insulating film body and is at least two, each crease line group comprises at least two parallel and spaced crease lines; the insulating film body is configured to be bent along the crease line, so as to form a transition part corresponding to the crease line group, and the transition part is arranged between the edge of the battery cell and the fillet of the shell. After the insulating film is bent along the crease line, the sharpness of the bending part is low, the possibility of interference or sliding between the bending part of the insulating film and the fillet structure of the shell is reduced, and the insulating film is more easily loaded into the shell.

The invention discloses an electric vehicle distributed charging optimization method and system based on a carbon emission sensitive dynamic electricity price, and the method comprises the steps: setting an initial iteration strategy based on a controllable electric vehicle load model, and averagely distributing the needed charging amount to all charging time periods; defining the size of an algorithm convergence criterion according to the required convergence precision and the number of the electric vehicles; constructing a dynamic electricity price containing coupling of a load item and a carbon emission item, and calculating an EVn cost function according to the dynamic electricity price; starting a kth round of iteration, traversing all EVn in each round of iteration, and counting k from 0; other electric vehicle charging power vectors except the EVn are calculated; after each iteration, checking whether a convergence criterion is met or not; if yes, the obtained load curve is an approximate solution of Nash equilibrium, and if not, the charging strategy is updated repeatedly; and after the load curve under the dynamic electricity price mechanism is obtained, the load curve under the time-sharing static electricity price with the same electricity price level is obtained through calculation. The method is suitable for electric vehicle group charging management in a community scene.

The application discloses a packaging all-in-one machine for BMC material production and relates to the technical field of BMC material packaging. The packaging all-in-one machine comprises a control box, a first mechanical hand for clamping an inner bag is fixedly connected to one side of the control box, a second mechanical hand for clamping an outer bag is arranged on the lower side of the first mechanical hand, a removing mechanism for removing fiber groups on the surface of BMC material is arranged on one side of the control box, a cutting mechanism for cutting BMC material is arranged on the lower side of the removing mechanism, and a bag sealing mechanism for sealing the inner bag is arranged on the lower side of the cutting mechanism. The first electric rotating table drives the BMC material for primary packaging to rotate above the outer bag. The inner bag is not only filled into the inner part of the outer bag, but also turned over, so that the too-narrow end is first inserted into the inner part of the outer bag. Due to the change of gravity, the BMC material at the wide end of the inner bag flows to the narrow end, and gradually becomes narrow, so that the inner bag filled with BMC material is conveniently filled into the inner part of the outer bag.

The utility model discloses double-layer laminated glass and relates to the technical field of glass. The double-layer laminated glass comprises a laminated glass body, a sleeve seat and a positioning base, the sleeve seat and the positioning base are arranged on the outer side of the laminated glass body, a first rubber ring is movably clamped in the sleeve seat, a second rubber ring is movably clamped in the positioning base, and a locking mechanism is arranged between the sleeve seat and the positioning base. According to the double-layer laminated glass, loading of the laminated glass body is convenient through the sleeve base, the positioning base and the locking mechanism, the laminated glass body is protected through the sleeve base and the positioning base, sealing and buffering of the laminated glass body are achieved through the first rubber ring and the second rubber ring, and when the first rubber ring and the second rubber ring are aged, the first rubber ring and the second rubber ring are sealed and buffered. And the first rubber ring and the second rubber ring can be conveniently and rapidly replaced and maintained, so that the device is easy to maintain, and the use requirements are met.

The utility model discloses automatic medicine box cover closing equipment which comprises an equipment body, the equipment body comprises a weighing part, a cover closing part and a guide rail, the guide rail is provided with a lower mold capable of moving between the weighing part and the cover closing part in a reciprocating mode, a medicine shell is installed in the lower mold, a medicine charging machine for adding medicine into the medicine shell is arranged in the weighing part, and the lower mold is provided with a medicine charging opening. An air cylinder for packaging the medicine cover on the medicine shell is arranged in the cover closing part; the automatic cover closing device has the advantages that the lower die is used for loading the medicine shell, the medicine cover is pressed downwards through movement of the air cylinder, the medicine cover is blocked on the medicine shell, and automatic cover closing of the medicine box is achieved.

This utility model relates to a device for removing impurities from recycled material in casting risers and gating systems, belonging to the technical field of recycled material impurity removal devices. It includes a base, a support frame fixed to the upper surface of the base, a removal component on the base, and a lifting component on the support frame. A material frame is placed on the left side of the upper surface of the base. The removal component includes a fixing frame fixed to the upper surface of the base, with two fixing seats fixed on the fixing frame. A rotating column is rotatably connected to the left side of the right fixing seat via a bearing, and a rotating rod is rotatably connected inside the left fixing seat via a bearing. This device for removing impurities from recycled material in casting risers and gating systems effectively removes impurities adhering to the surface of the recycled material through mutual collision and friction between the recycled material and the collision and friction between the recycled material and the inner peripheral wall of the hexagonal rotating frame. This mechanical removal method is more efficient and thorough than traditional manual cleaning, reducing manual intervention and improving cleaning efficiency.

The utility model relates to the technical field of powder cosmetic processing, in particular to an automatic powder pressing and typesetting device for powder cosmetics. According to the technical scheme, the powder pressing device comprises a powder pressing table, a sliding groove is formed in the top face of the powder pressing table, a first motor is arranged on the right side of the powder pressing table, the output end of the first motor penetrates and extends into the sliding groove and is provided with a screw rod, the outer ring of the right end of the screw rod is in threaded connection with a threaded block, and a containing table is arranged on the top face of the threaded block; and a mounting groove is formed in the placement table, and a gear is rotationally arranged on the inner bottom surface of the mounting groove. According to the device, a cosmetic box is conveniently clamped and fixed by arranging the placing table to the clamping plate, the gram weight of powder is conveniently and quantitatively controlled by arranging the vertical plate to the discharging pipe, the powder is conveniently compacted by arranging the L-shaped bracket to the pressing module, and automatic feeding, powder pressing and transferring are conveniently carried out by arranging the motor I to the threaded block; and the powder pressing precision and efficiency are improved.

The embodiment of the present disclosure provides a data processing method, device, electronic equipment, storage medium and product. The data processing method comprises: in a preheating stage of an engine, instantiation of the engine is performed through a string in an engine file to obtain an engine instance, the engine file comprises a front-end interface file in a first format, and the front-end interface file comprises a string after encoding an engine logic file in a second format; in a stage of loading multimedia data in the front end, the engine instance is acquired; and the multimedia data is run based on the engine instance. In the preheating stage, instantiation of the engine is directly performed based on the string in the front-end interface file, and execution of the engine logic file in the second format is realized. In the stage of loading the multimedia data, the multimedia data is directly run based on the preheated engine instance.

The utility model belongs to the technical field of environmental governance, and particularly relates to a sludge aerobic fermentation drying feeding lifting device which comprises a lifting hopper, blocking pieces, an opening and closing piece, a driving piece and a beating piece, the blocking pieces are symmetrically arranged at the bottom of the lifting hopper, the blocking pieces are fixedly connected to the opening and closing piece, and the opening and closing piece is fixedly connected to the lifting hopper. According to the designed sludge aerobic fermentation drying feeding lifting device, when sludge is lifted and fed, the bottom of the lifting hopper is blocked through the blocking piece and the opening and closing piece, so that when the sludge is discharged out of the lifting hopper, the discharging speed of the sludge can be controlled, the sludge in the lifting hopper is prevented from being discharged at a time, and the sludge discharging efficiency is improved. The sludge in the lifting hopper can be conveniently and rapidly emptied through the matched design of the driving part and the beating part, and it is ensured that the situation that too much sludge is left, and the next-time sludge loading amount is affected is avoided.

The utility model belongs to the field of mining drilling machines, and relates to a full-section drilling machine with a drilling rod conveying system, which comprises a moving platform, a drilling rod box, an auxiliary manipulator, a posture adjusting device, a drilling rod transporter, a main manipulator and a rack, and the posture adjusting device comprises a revolving platform, a lifting sleeve, a transporter gyrator and a dip angle gyrator. The rotating platform serves as a carrier of the posture adjusting device and is rotationally connected to the movable platform, the lifting sleeve is vertically installed on the rotating platform in a lifting mode, the transporter gyrator and the dip angle gyrator are both installed on the lifting sleeve, and the transporter gyrator and the dip angle gyrator are installed on the lifting sleeve. The dip angle gyrator and the transporter gyrator are both located on the side, away from the drill rod box, of the lifting sleeve. The drill rod transporter is arranged at the top of the transporter gyrator, and the dip angle of the drill rod transporter is adjusted through the transporter gyrator; the machine frame is arranged on the side, away from the lifting sleeve, of the dip angle gyrator in a side hanging mode, and the main mechanical arm is installed on the machine frame and rotates along with the machine frame.

The present application relates to tap processing technical field, especially a valve core installation device for tap production, which can automatically place the valve core on the tap and automatically position the tap.The valve core installation device for tap production comprises a base, an electric conveyor, a fixing frame, a first sliding block and a pressing cylinder, etc.The fixing frame is installed on the left side of the upper part of the base, the first sliding block is slidably connected to the upper front part of the fixing frame, the pressing cylinder is slidably connected to the middle part of the first sliding block in a longitudinal manner, the inside of the pressing cylinder is hollow, and the electric conveyor is installed on the upper side of the left part of the base.After the tap is discharged from the rear blocking rack, the conveyor belt of the electric conveyor conveys the tap forward to the rear of the front blocking rack, and the tap is blocked and positioned by the front blocking rack, so that the tap can be positioned automatically and the valve core can be accurately installed in the tap subsequently.

The utility model discloses a kind of feeding devices for mining tray production line, including bottom plate, controller is set on its upper end left side;Speed reducer motor, it is set in the lower end left side of bottom plate, and the output end of speed reducer motor is connected with movable structure, the movable structure includes link wheel, mounting wheel and mounting rod, and link wheel is installed in the output end of speed reducer motor;Moving plate, it is installed in the outside of mounting rod, and the inside right side of moving plate is provided with pneumatic telescopic rod, the right side of pneumatic telescopic rod is connected with mounting plate, and the inside of mounting plate is connected with connecting plate, the inside of connecting plate is provided with clamping structure, and clamping structure includes electric telescopic rod, fixed block and link plate. The feeding device for mining tray production line is provided with movable structure, can move raw material steel plate, so as to raw material steel plate is fed, and provided with clamping structure, can play the role of taking material to raw material steel plate.

The utility model provides an automatic centering device for concrete compressive strength detection, which comprises a base, the top of the base is fixedly provided with vertical support rods in a rectangular array, a cleaning mechanism comprises a first motor, a translation screw rod, a movable sliding block and a longitudinal strip plate, and the back of a mounting block is provided with a back sliding chute. A translation screw rod is rotationally installed in the back sliding groove, a first motor is installed at one end of the translation screw rod, and the first motor is arranged close to the supporting plate; bristles and a scraping plate are arranged on the surface of the longitudinal strip plate, the side section of the scraping plate is triangular, and a containing cavity is formed in the longitudinal strip plate and used for receiving impurities scraped by the scraping plate; and a garbage can is hung at one end of the lower pressing block. When the device is used for detecting the compressive strength of the concrete test block, the centering arrangement of the test block can be quickly completed, repeated adjustment is not needed, and impurities at the upper pressing block can be quickly cleaned.

The utility model relates to the technical field of organic fertilizer fermentation, and discloses a fermentation tank for a biological organic fertilizer, which comprises a storage tank, the top of the storage tank is fixedly connected with a cover plate, the middle of the cover plate is rotatably connected with a rotating shaft, the outside of the rotating shaft is fixedly connected with a first spiral blade, the outside of the first spiral blade is provided with a cylinder, and the cylinder is provided with a second spiral blade. The bottom of the cylinder is fixedly connected to the bottom of the inner wall of the storage tank, a connecting rod is fixedly connected to the outer portion of the upper end of the rotating shaft, and a flow guide scraper is fixedly connected to the bottom of the connecting rod. According to the feeding device, the electric push rod is used for pushing the push rod to ascend, the push rod rotates while ascending, so that the feeding barrel is pushed to rotate, the angle is adjusted, feeding is facilitated, raw materials can be driven to turn over up and down through rotation of the first spiral blade and cooperation of the first spiral blade and the barrel, the raw materials can be stirred through the rotating stirring shaft and the rotating stirring blades, and the stirring efficiency is improved. The problem of non-uniform fermentation of the organic fertilizer is avoided.

The utility model discloses an engine cleaning machine with fixed-point positioning function, including the water tank structure of installation in the upper part of equipment outer box and the arc movement structure of realizing shower nozzle arc movement, the utility model discloses when washing engine, the shower nozzle is fixed in the through -hole of connecting pipe, through the drive motor drive swash plate rotation, make first slide bar in the slide rail of swing rod surface sliding, simultaneously pull the connecting plate inside swing rod in the upper portion of equipment outer box and carry out the swing of arc trajectory, simultaneously swing rod pull second slide bar and make the slider in the inside left and right swing of T type groove, simultaneously drive the synchronous sliding of upper slide and water storage tank to the high pressure spray cleaning of different position of engine surface to the shower nozzle, realize the multi -angle, all -round cleaning of shower nozzle, effectively solved the problem of dead angle in traditional cleaning mode, improved the efficiency and the cleanliness of engine cleaning.

This utility model discloses a high-efficiency mixing granule packaging machine, including a packaging machine body, a weighing mechanism, a feeding mechanism, a flipping clamping mechanism, and a stirring mechanism. The top of the packaging machine body has a feed inlet, and support plates are fixed on both sides above the feed inlet. A weighing mechanism is installed above each of the two support plates, and a feeding mechanism is fixed on each of the two support plates. A flipping clamping mechanism is fixed above the feeding mechanism, and a stirring mechanism is fixed in the middle of the feed inlet. The weighing mechanism facilitates weighing and mixing of the granules, improving the accuracy of quantitative measurement. The combined use of the feeding mechanism and the flipping clamping mechanism facilitates feeding the weighed and quantitatively measured granules. The stirring mechanism ensures thorough mixing of the granules while preventing blockage during feeding, thus improving work efficiency.

The utility model provides a kind of mechanical clamp of the parts of battery external lower box, it is related to battery pack technical field, including support arm, support plate and connecting arm, the support plate is rotatably connected with support arm, the connecting arm is equipped with two groups, and connecting arm is located at one end of support plate, clamping assembly is equipped on the connecting arm, and clamping assembly is used to clamp lower box;Adjusting member is equipped at the four corners on the support plate;The utility model is connected on mechanical arm and is displaced to nut feeding equipment, the height of adsorption rod is adjusted by adjusting member, nut in four point positions is adsorbed, nut adsorption can be completed only by lifting in whole process, material taking stroke is lower, before subsequent nut feeding, first, lower box that injection molding area has been shaped is taken out by clamping assembly, then nut feeding is carried out, after feeding is completed, lower box can be sent to unloading area immediately, in conclusion, it is convenient to continuously feed and unload finished product, reduce equipment cost, improve efficiency, adapt to production continuity.

The utility model discloses a separate discharge cylinder of ball mill and ball mill belongs to tea processing equipment technical field. A kind of ball mill is used for the grinding of tea, including frame, grinding assembly and discharge cylinder;Frame middle is provided with grinding work area, to divide frame into left and right two side frame bodies;Swing arm is provided on the grinding work area of frame, and both ends of swing arm are rotatably connected with frame;Grinding assembly is installed and set on swing arm;Grinding assembly includes grinding cylinder;The top of grinding cylinder is provided with inlet and outlet opening and is penetrated;Grinding cylinder is hollowly provided with grinding cavity, to be used for carrying tea and grinding ball for grinding, carry out the grinding of tea;Discharge cylinder is used for after grinding, and can be detachably embedded in inlet and outlet opening, to separate grinding ball and ground tea powder;So set, can realize the grinding of tea, and the separation of tea powder and grinding ball.

The utility model discloses a kind of fine soft material efficient accurate material taking and blanking device, it is related to fine soft material material taking technical field, and it includes: support backplate, to support material taking device, bunker device and material pressing device;The bunker device is composed of bunker bottom plate, bunker left and right side plate, bunker cover plate and bunker baffle, and is fixed in the support backplate via bunker cushion block, and the bunker device is used to store fine soft material;The material pressing device includes slide rail, sliding block, press strip support plate and press strip, and the slide rail is fixed in the support backplate;The material taking device includes material taking wheel and transmission shaft, and the material taking wheel is provided with material taking groove.The technical problem to be solved by the utility model is to provide a kind of fine soft material efficient accurate material taking and blanking device, it has the advantages of accurate material taking quantity, high efficiency, and is especially suitable for the material taking unit of fine soft material automatic processing and handling equipment.

The utility model discloses an underground cable automatic armoring machine, including bottom plate, frame, the top of bottom plate is equipped with fixed plate, and the middle part of frame left and right sides all is fixed with the communicating pipe of sleeve joint, and the end of two communicating pipes is rotatoryly installed with the inner surface of two fixed plate middle part, and the middle part of frame front and back sides all is provided with quick -release mechanism, and quick -release mechanism includes main rod, armored plate no.

The utility model relates to the technical field of corn seeding, especially to a seeding assembly for breeding burst corn. It comprises a storage bin, which is in a horizontal cylindrical structure and is provided with a feeding port at the top end. A pushing motor is fixedly arranged on one side of the storage bin. The output end of the pushing motor is fixedly connected with a pushing plate inside the storage bin. A discharge bin is connected to the lower part of the storage bin. A discharge port is formed at the bottom end of the discharge bin. A rotating motor is fixedly connected to one side of the discharge bin. The output end of the rotating motor is fixedly connected with a discharge rotary blade that is inclined along the discharge port. The utility model aims to solve the problem of stable and uniform quantitative seeding of the seed of the burst corn with small particle size.

This invention relates to the field of milling equipment technology, and discloses a high-precision crankshaft milling device based on multi-axis linkage. The device includes a base, a Y-axis linear guide fixedly connected to the top of the base, an X-axis linear guide slidably connected to the outside of the base, the top of the Y-axis linear guide positioned at the bottom of the X-axis linear guide, a Z-axis vertical column fixedly connected to one side of the top of the base, a precision milling spindle head disposed on the outside of the Z-axis vertical column, and an adapter fixing mechanism disposed on the top of the X-axis linear guide. This adapter fixing mechanism clamps the crankshaft and drives it to rotate. The automatic alignment mechanism allows for automatic alignment of the crankshaft after it has been roughly placed on the mechanism, thus facilitating loading, saving loading time, and improving loading efficiency. Furthermore, the device has a simple structure and low price, thus not significantly increasing equipment costs and further reducing the cost of crankshaft milling.

This invention relates to the field of automotive parts welding technology, specifically a lightweight automotive door sill welding device and method; it includes a housing and upper and lower electrode rods on the front side of the housing; a support is fixedly connected to the upper surface of the base at the bottom of the housing and located on the front side of the housing; two conveyor plates are fixedly connected to the top of the support; conveyor rollers are rotatably connected to the inner side of the conveyor plates; a conveyor belt is driven to the outer wall of the conveyor rollers; an inclined unloading hopper is fixedly connected to the right end of the conveyor plates; one of the conveyor rollers is driven by a motor; this invention uses the clamping plate of the tooling table to precisely limit the U-shaped workpiece to be welded, combined with the positioning of the lower electrode rod with the hole and the table hole, effectively avoiding the shaking of the workpiece and the conveyor belt during the welding process, thus improving welding efficiency while ensuring welding accuracy, thereby improving the quality of the door sill after welding and meeting the vehicle body anti-collision performance requirements.

This utility model discloses a collagen mask soaking device, relating to the field of mask soaking technology. It includes a soaking box with fixed plates fixedly connected to both sides. Limit grooves are formed on the inner surfaces of both sides of the fixed plates. A servo motor is detachably connected to the bottom of one fixed plate, and a threaded rod is detachably connected to the output shaft of the servo motor. A guide rod is fixedly connected inside the other fixed plate. A U-shaped lifting frame is installed on the threaded rod and the guide rod. Two limit blocks are fixedly connected to both sides of the U-shaped lifting frame. Two columns are symmetrically fixedly connected to the lower end of the U-shaped lifting frame, and a reinforcing rib is fixedly connected to one side of each column. This collagen mask soaking device uses a servo motor to drive the lifting frame to rise and fall, improving soaking uniformity and efficiency. A circular groove positions the mask, and a drain hole cooperates with a drain plate to drain the liquid. The cover plate snap-fit ​​structure facilitates installation and removal, ensuring the mask does not shift.