198 results about "Air barrier" patented technology

The invention discloses a spline shaft high-speed grinding and cooling device and method, and relates to the technical field of grinding and cooling devices.The spline shaft high-speed grinding and cooling device comprises a workbench, a grinding assembly, a clamping and rotating assembly, a conveying assembly and liquid guiding mechanisms, an encircling structure is formed by the two symmetrically-arranged liquid guiding assemblies, and the design that the center extension line of a jet flow opening accurately points to a grinding position is matched; the problem that a traditional fixed nozzle cannot focus on a grinding area is solved, cooling liquid can directionally act on a grinding contact area, and it is guaranteed that grinding points are effectively covered all the time in the spline shaft machining process. By means of the synergistic effect of the spiral liquid guide structure and the high-speed rotation of the spline shaft, cooling liquid is continuously accelerated in the gradually-shrunk flow channel to form high-pressure spiral flow so as to effectively break through an air barrier formed by high-speed rotation on the surface of the spline shaft, and the centrifugal acceleration effect of the spiral flow is combined with the pressurization effect of the gradually-shrunk flow channel of the protective cover. And the spraying kinetic energy of the cooling liquid is greatly improved.

The invention discloses a grouting pipe embedding device for municipal engineering construction, and relates to the technical field of grouting pipes. A falling piston rod can stably input gas in a gas-liquid two-way pipe into a rubber gas partition arranged outside the grouting pipe, so that the gas is expanded, and the grouting pipe is embedded in the gas-liquid two-way pipe; the spiral diameter of the expanded rubber air partition is larger than the diameter of the upper end and the diameter of the lower end of the grouting pipe, a spiral setting posture can be formed in the hole channel, the grouting pipe is stabilized in the hole channel, the grouting stability is improved, meanwhile, the spirally-wound rubber air partition can effectively block soil residues or broken stones falling in the hole channel, and the grouting effect is improved. In addition, the spiral rubber gas partition does not form isolated ring sealing on the hole channel, during grouting, gas in the underground space can be smoothly discharged through gaps of the spirally-set rubber gas partition, and the grouting quality is improved. The problem that a honeycomb-shaped wrapping layer is formed after gas in a narrow underground space cannot be discharged and is mixed and solidified with slurry is solved.

A system of head protection with an integrated air filtration mechanism for protecting the user from impact / concussion and ambient air pollution. Example embodiments comprise a rigid helmet shell covering the head of the user and a fabric air barrier around the user's neck, a battery powered filtered centrifugal fan contained inside an external detachable cowl apparatus adjoins to a helmet external top spoiler with a mounting system that is easily removable to meet impact attenuation standards. The cowl apparatus directs clean filtered air into the duct system—a top spoiler funnel connected to an internal clean air duct and exits the visor air curtain providing continual clean laminar airflow between the user's face and the face shield. One or more sensors, calibrated to detect harmful particulates and a processor to automatically activate the system as a protective measure when harmful particulates are encountered and a sensor to detect when filter element needs replacement.

The utility model discloses an air guide component and a server, and relates to the technical field of servers, the air guide component is arranged on a plate assembly, the air guide component comprises an air baffle set and an air guide plate set, the air baffle set is arranged on the side, away from the plate assembly, of the air guide plate set and connected with the air guide plate set, and the air guide plate set comprises an air guide channel; an air outlet of the air guide channel faces a to-be-cooled part on the plate assembly, the air baffle set is provided with a windward side, and airflow reaching the windward side is blocked by the windward side and then flows to the to-be-cooled part through the air guide channel; the problem that the unused memory slot area of the server cannot properly guide the heat dissipation air flow in the related technology is at least solved, and the heat dissipation air flow is prevented from directly flowing away in the direction of the air baffle plate group and finally being lost; and the technical effect of meeting the heat dissipation requirement of the to-be-cooled part, close to the plate surface of the plate assembly, on the plate assembly is achieved.

The invention relates to the technical field of impact crushers, and provides a machine-made sand preparation impact crusher with a dust removal function, the machine-made sand preparation impact crusher comprises a rack, a feed port, a discharge port, a front impact frame, a rear impact frame, a crushing mechanism and a dust removal mechanism, the rack is internally provided with a crushing cavity, and the top end and the bottom end of the rack are provided with the feed port and the discharge port respectively; a front impact frame and a rear impact frame are installed on the inner side wall of the crushing cavity, the crushing mechanism is arranged in the crushing cavity and used for impacting and crushing stone, and the dust removal mechanism is arranged on one side of the rack and comprises a box body, a dust collection box, an air partition plate, a negative pressure collection assembly, a filtering assembly and a dust removal assembly. And the dust removal device is used for filtering and cleaning dust generated during stone crushing and regularly carrying out dust removal treatment on the filtering assembly. By means of the technical scheme, the problem that in the prior art, when an impact crusher crushes stone, dust drifts out of equipment and pollutes the environment is solved.

The utility model discloses a water outlet structure applied to an upper punch of an oral cavity cleaner, which comprises a shell, a water drum arranged in the shell, a water suction pipe arranged in the water drum and capable of intermittently pressing injected water, a driving motor arranged on one side of the water suction pipe, a hose connected to the top of the water suction pipe, and an upper cover connected to the top of the hose. A water spraying pipe for spraying to the oral cavity is arranged in the middle of the upper cover; the driving motor is matched with a matched battery, the battery drives the cam to rotate after powering on the driving motor, the convex column drives the connecting rod to start to do up-down reciprocating motion of swinging, and meanwhile the extension column penetrating through the outer side of the water suction pipe on one side of the connecting rod reciprocates up and down at the same time. When the water suction pipe is pressed downwards, the middle sliding plate compresses air in the water barrel to enable the air blocking piece to drive the spring to run out of the air pipe upwards, and when the water suction pipe is driven by the connecting rod to ascend, the air blocking piece faces inwards to enable the air in the water barrel to be in a closed state, water is pressed out from the bottom of the water suction pipe and enters the water spraying pipe to be sprayed out from the connected hose. And the effect of intermittent pulse water outlet is achieved.

A expandable panel assembly that provides an air barrier in a row of server racks in a data center or similar facility in spaces in the row that are not occupied by a server rack. The expandable panel assembly includes a base panel assembly and a slidable panel assembly. The base panel assembly and the slidable panel assembly are configured such that the slidable panel assembly can be slid along the base panel assembly between retracted (non-extended) and extended positions. The base panel assembly includes a channel member with first and second channels. The slidable panel assembly is slidably retained in one of those channels.

The invention discloses a composite environment-friendly PET long fiber high-resilience light-weight car roof and a preparation method thereof, and belongs to the technical field of car roof preparation, the car roof comprises a car roof plate and an interior trimming panel, the car roof plate comprises a bottom plate, a plurality of blocks are fixedly connected to the upper portion of the bottom plate, the blocks are fixedly connected through connecting strips, and the interior trimming panel is fixedly connected to the bottom plate. A top plate is fixedly connected to the upper portion of the block, and a paint layer is sprayed to the top of the top plate. The automobile roof comprises a bottom plate and an inner decorative plate, the inner decorative plate comprises a decorative plate, the decorative plate is fixedly connected to the lower portion of the bottom plate, and a filling layer and inner decorative cloth are sequentially arranged below the decorative plate. Compared with a traditional iron automobile roof, the automobile roof is made of a PET fiberboard, the heat conduction efficiency is low, the automobile roof is of a multi-layer structure, and the service life of the automobile roof is prolonged. A plurality of air grids are arranged in the roof plate, so that heat can be further insulated, and the compressive strength of the roof plate can be enhanced.

The invention relates to a cell device (10) with a hot system part (62), wherein the hot system part (62) has at least one cell unit (12), wherein the cell device has an air supply line (20) which is designed to supply the hot system part (62) with air, in particular to supply the at least one cell unit (12) with air, wherein an air filter unit (64) which has a first filter (68a) and a second filter (68b) parallel to the first filter (68a) is arranged on the air supply line (20). It is proposed that the first filter (68a) is designed to be exchangeable and the air filter unit (64) has a first air barrier (78a) for the first filter (68a).

The invention relates to an in-hole ventilation method and system for long and large tunnel blasting construction, and belongs to the technical field of in-hole ventilation for tunnel blasting construction. A plurality of groups of tunnel air draft devices, air supply devices and foul air blocking devices are arranged in a tunnel at preset intervals, and the tunnel is divided into clean gas caverns and foul gas caverns. During construction, an air curtain machine and a dust isolation material are utilized to form dynamic-static double barriers, clean and dirty areas are strictly separated, dirty gas generated by blasting is discharged out of a tunnel step by step through an air draft device and an air supply device which are connected step by step, and meanwhile external clean gas is conveyed to a tunnel face step by step. The system comprises a plurality of groups of tunnel air draft devices, air supply devices and vitiated air blocking devices, the power of fans is matched, the length of a pipeline does not exceed 1500m, and the pipeline can be dynamically expanded along with tunneling. The problem that the long tunnel is low in long-distance ventilation efficiency is solved, the foul gas exhaust efficiency is improved, the construction cost is reduced, the construction period is shortened, and meanwhile construction safety is guaranteed.

The invention belongs to the technical field of low-voltage electric appliances, and discloses a circuit breaker which comprises a shell, a movable contact knife, a static contact seat, a static arc striking assembly and a gas blocking assembly. A contact support is arranged in the shell, and the movable contact knife is rotationally connected with the contact support; and the movable contact knife is provided with a movable arc striking contact and a movable contact which are distributed at an interval. The static contact seat is installed on the housing, and the static contact seat is provided with a static contact. The static arc striking assembly is arranged on the static contact seat, and the static arc striking assembly is provided with a static arc striking contact. The gas blocking assembly comprises a gas blocking plate and an elastic piece, one end of the gas blocking plate is located between the static arc striking contact and the static contact and rotationally connected with the static arc striking assembly, and the elastic piece exerts elastic acting force on the gas blocking plate so that the other end of the gas blocking plate can abut against the movable contact knife all the time till the electric arc is extinguished. When the moving contact knife moves, the gas baffle plate always abuts against the moving contact knife, so that the gas baffle plate can effectively prevent an electric arc from moving towards the moving contact and the static contact, the moving contact and the static contact are prevented from being broken down, the structure is simple, and cost reduction is facilitated.

A windshield device for a horizontal ampoule machine relates to the technical field of ampoule bottle manufacturing. The top cover plate is moved in the front-to-back direction. Since the rear cover plate is fixed to the lower end of the top cover plate, when the top cover plate moves, the rear cover plate moves synchronously, which can adjust the air circulation above the flame, and can be removed when the flame is overheated. The rear cover plate can block the influence of the wind from the rear on the flame. The side cover plate can slide freely in the front-to-back direction relative to the top cover plate, which can adjust the influence of the wind on the flame on the left and right sides. The lifting plate can move up and down relative to the frame 1 through the lifting mechanism, which can block the influence of the wind from the front on the flame, and is convenient for manual adjustment. The stable production of the product and the increase of the qualified rate are achieved; the personnel also avoid the heat radiation of the equipment, and the equipment is kept warm in winter and insulated in summer, which is the best of both worlds, and the cost is lower than surrounding the workshop where the production line is located.

An airflow system for buildings, and its method of use, is provided to provide pollution mitigation for occupants of a building. An airflow system for a building is provided, comprising: at least one air purification system that provides purified air and receives recirculated air; at least one supply air assembly that supplies purified air from the air purification system to at least one internal airflow space, the internal airflow space including one or more office cubicles, meeting rooms, and auditoriums; at least one return air assembly that returns recirculated air from at least one internal airflow space back to at least one air purification system; directional airflows formed between the supply air assembly and the return air assembly, including a first directional airflow and a second directional airflow that form one or more air barriers between occupants to provide respiratory isolation, the second directional airflow forming an airflow field around each occupant; and at least one control system that controls the airflow system. The airflow system provides pollution mitigation for each occupant.

The utility model provides a laser probe protection mechanism of a laser navigation forklift type AGV, and relates to the field of AGVs. The laser probe protection mechanism of the laser navigation forklift type AGV trolley comprises a split-type fixed seat and a protective cover used for providing external protection for a laser probe, and the fixed seat comprises a seat plate and a damping cushion block which are fixedly connected. According to the laser probe protection mechanism of the laser navigation forklift type AGV trolley, external protection can be provided for a laser probe in the use process of the AGV trolley through the arrangement of the protection cover on the fixed seat, and an annular air barrier can be formed outside a spherical cover through the arrangement of an air curtain mechanism on the outer side of the fixed seat, namely the cooperative use of multiple groups of flow guide seats and an air pump; the dust and water mist attachment is continuously blocked, the manual cleaning frequency is reduced, then stable self-cleaning protection is provided for the protective cover, through modular split type arrangement of the fixing base, the protective cover and the air pump, workers can conveniently disassemble, assemble and replace independent parts, and the maintenance cost is reduced.

An airflow system for buildings and a method of using the same are disclosed to provide pollution mitigation for occupants of a building. The airflow system includes: at least one air purification system for providing purified air and receiving recirculated air; at least one supply air assembly for supplying purified air from the air purification system to at least one internal airflow space, the internal airflow space including one or more of a corridor, cafeteria, restroom, and elevator; at least one return air assembly for returning recirculated air from at least one internal airflow space to at least one air purification system; directional airflow formed between the supply air assembly and the return air assembly, and including at least one or more of a directional airflow field around each occupant, an air barrier located between each occupant, and an airflow field around each occupant; and at least one control system for controlling the airflow system. The airflow system provides pollution mitigation for each occupant.

The present invention discloses a wind curtain cabinet with a fan motor protection structure, which relates to the field of refrigeration. It includes a fan bracket, an end plate, a water baffle, an air ring, a fan blade, and a fan motor. The fan motor protection structure is composed of the fan bracket, the end plate and the water baffle. The fan bracket is fixed at the bottom of the cabinet in an inclined shape. The water baffle is located between the fan motor and the evaporator, is inclined and has a width greater than the fan blade diameter. The wind baffle is provided with wind-evening holes, which can refine the wind generated by the fan motor, make the wind generated by the fan motor more uniform, and improve the efficiency of the fan motor. The water baffle prevents the condensed water of the evaporator from dripping onto the fan motor, thereby avoiding malfunction of the fan motor.

The present invention provides a laminate having low air permeability and excellent moisture permeability in a low-temperature, low-humidity environment. The laminate comprises: a porous substrate; and a moisture-permeable membrane provided on one surface of the porous substrate. The laminate has an air barrier of 3000 sec / 100 cc or higher according to the Gurley method in accordance with JIS P8117-2009, and a first moisture permeability of 300 g / (m2) under the conditions of a temperature of 5°C, a relative humidity of 45%, and a wind speed of 0.2 m / s or less according to the moisture permeability test method (cup method) in accordance with JIS Z0208-1976. 2 ·24h) or more.

The present invention discloses a copper wire voice coil double-station winding device, including a base plate, a wire arrangement mechanism installed on the base plate, which is used to arrange the coil, including a wire arrangement seat, a wire arrangement module, a wire clamping and cutting assembly, and a wire arrangement and clamping device; an upper spindle mechanism, which is used to ensure the winding height and height accuracy of the coil, including an upper spindle seat, an upper spindle moving device, an upper spindle winding device, a hot air gun device, a hot air shielding device, and an upper spindle mold; a lower spindle mechanism, which is used to ensure that the coil is wound smoothly and efficiently, including a lower spindle switching device, a switching limit assembly, a double-station winding device, and a lower spindle mold; a first hot air gun mechanism, which is used to keep the upper spindle mold warm; and a second hot air gun mechanism, which is used to keep the lower spindle mold warm. The present invention adopts the above-mentioned copper wire voice coil double-station winding device, which can effectively reduce the waiting time of the workstation and greatly improve the production efficiency of the equipment.

An anti-scald UV curing lamp box comprises a lampshade, a cooling assembly, a light-emitting assembly, a bottom plate and an opening and closing assembly, the cooling assembly and the light-emitting assembly are sequentially arranged on the lampshade from top to bottom, the bottom plate and the opening and closing assembly are located under the lampshade, and one end of the bottom plate is hinged to the lampshade and forms a curing chamber used for containing a product to be cured. The light-emitting assembly is located over the curing chamber, at least one heat insulation plate is arranged in the lampshade, and a separation layer is formed by the heat insulation plate and the inner surface of the lampshade. The structure can solve the problem that the temperature of the outer surface of the lampshade is too high due to the fact that a large amount of hot air is gathered in the lampshade, and therefore a user may be scalded by a high-temperature machine shell when touching equipment by mistake by the hand carelessly.

The invention belongs to the technical field of batteries, and discloses a battery cover plate and a battery, the battery cover plate comprises a conductive pole, a first insulating part and a cover plate body, the conductive pole comprises a pole main body and a pole bottom plate, the first insulating part is provided with an insertion through hole and a containing groove, and the insertion through hole is communicated with the containing groove; the containing groove comprises a first wall face opposite to the pole bottom plate in the first direction, at least one avoiding through hole is formed in the first wall face, the cover plate body is arranged on the side, away from the conductive pole, of the first insulating part, and supporting bosses in one-to-one correspondence with the avoiding through holes are arranged on the side, facing the first insulating part, of the cover plate body. The supporting boss penetrates through the avoiding through hole and is in insulation contact with the pole bottom plate, so that a heat insulation gap is formed between the first wall surface and the pole bottom plate. On one hand, the first insulating part is prevented from being in direct contact with the pole bottom plate welded with the pole lug, and on the other hand, an air interlayer is formed between the first insulating part and the pole bottom plate by utilizing the heat insulation gap, so that the heat influence on the first insulating part during welding of the pole lug and the pole bottom plate is reduced.

This invention discloses a tunnel smoke treatment and fire rescue system based on an air barrier. A pulley is installed on a guide rail, with its lower end connected to the upper end of a first telescopic rod. The lower end of the first telescopic rod is connected to a groove at the tail end of a fan. A first filter, a second filter, and a third filter are sequentially installed inside the duct along the gas flow direction. A first pipe is installed on the first filter. A third pipe is installed at the top of the tunnel, and the third pipe is connected to an atomizer via the second pipe. The nozzle of the atomizer is located inside the exhaust port of the fan. The fire protection system includes a fire extinguisher, a directional rod, a fourth pipe, a fifth pipe, and a second telescopic rod slidably connected to the guide rail. The lower end of the second telescopic rod is connected to the fire extinguisher via the directional rod. A second bracket is installed at the front end of the fire extinguisher, and the nozzle of the fire extinguisher is fixed to the second bracket. This system can avoid traffic congestion at the tunnel entrance and simultaneously prevent harmful smoke and high temperatures from threatening the personal safety of firefighters.

Systems and methods for managing airflow for cooling computing devices (e.g. in a data center) in normal and cold environments are disclosed. In one embodiment, the method comprises positioning the computing devices on a plurality of racks with air barriers to create hot and cold aisles. The computing devices may be configured in a first mode to draw in cool air the cold aisles and exhaust heated air into the hot aisles. Temperatures in the cold aisles may be periodically measured. In response to temperatures below a predetermined threshold, one or more of the cold aisles may be converted into a temporary hot aisle by adjusting ventilation openings and configuring a subset of the computing devices to temporarily draw in warm air from the temporary hot aisle.

There is provided an airflow system for a building. The airflow system includes at least one air purification system providing purified air and receiving recirculated air; at least one air supply assembly supplying the purified air from the air purification system to at least one interior airflow space including one or more of, an office cubicle, a conference room, and an auditorium; at least one air return assembly returning the recirculated air from the at least one interior airflow space to the at least one air purification system; directional airstream(s) formed between the air supply assembly and the air return assembly, including first directional airstream(s) forming one or more air barriers between occupants, to provide respiratory isolation, and second directional airstream(s) forming an airflow field around each occupant; and at least one control system controlling the airflow system. The airflow system provides a contamination mitigation for each occupant.

The utility model belongs to the technical field of nitrogen-sealed water tanks, in particular to a glass fiber reinforced plastic nitrogen-sealed water tank with high purity requirement, which comprises a glass fiber reinforced plastic nitrogen-sealed water tank body, the inner wall of the glass fiber reinforced plastic nitrogen-sealed water tank body is fixedly connected with a sealing liquid containing groove plate, and the sealing liquid containing groove plate is filled with air isolation liquid. A deformable air barrier film is arranged on one side of the sealing liquid containing groove plate, a hard connecting ring plate is fixedly connected to the top end of the deformable air barrier film, and an L-shaped liquid sealing ring plate is fixedly connected to one side of the hard connecting ring plate; by means of cooperation of the sealing liquid containing groove plate, the air isolation liquid, the deformable air isolation film, the hard connecting ring plate and the L-shaped liquid sealing ring plate, the upper-layer space in the glass fiber reinforced plastic nitrogen sealing water tank body can be sealed and separated. When external air enters the glass fiber reinforced plastic nitrogen-sealed water tank body through an air valve at the top of the glass fiber reinforced plastic nitrogen-sealed water tank body due to insufficient nitrogen supply, the air is prevented from being in contact with ultrapure water in the glass fiber reinforced plastic nitrogen-sealed water tank body.

A multi-layer composite curtain wall belongs to the technical field of curtain walls. Comprising a perforated steel bearing plate, a heat preservation layer, a sound insulation layer, a keel, a galvanized flat plate, a silk screen, an inner panel, a fastener assembly and an outer panel. The heat preservation layer is arranged at the upper end of the perforated steel bearing plate, and the air isolation layer is arranged between the heat preservation layer and the perforated steel bearing plate. The sound insulation layer is arranged at the upper end of the heat preservation layer, and a plurality of keels are arranged on the sound insulation layer at intervals; the galvanized flat plate is arranged at the upper end of the keel, and the waterproof coiled material is arranged on the galvanized flat plate; the silk screen is arranged at the upper end of the waterproof coiled material, the inner panel is arranged on the silk screen, and the outer panel is installed on the inner panel through a plurality of fastener assemblies. The composite curtain wall has the effects of heat preservation, heat insulation and water prevention; the inner panel and the outer panel are installed through the fastener assembly, installation is convenient, safety is improved, and working efficiency is high. The heat preservation layer is a honeycomb interlayer, the weight of the decorative plate can be reduced, the heat preservation effect is improved, and the use value is improved.

The present application belongs to the technical field of polishing device, disclose a kind of polishing device for stainless steel casting production, comprising: frame and drive motor, the output shaft of drive motor is equipped with polishing wheel, the inside of polishing wheel is equipped with air inlet passage, the output shaft of drive motor is hollow shaft, its pipe wall is equipped with gas outlet, the air outlet of output shaft is connected with the air inlet passage of polishing wheel, to form dust adsorption path from polishing point to the inside of output shaft;The inside of the output shaft of drive motor is equipped with fluid delivery component, and the stretchable piece is equipped between the fluid delivery component and frame;The beneficial effects of the present application are: fluid delivery component constructs two-way air circulation system, realizes the integration dust control from polishing point direct adsorption, efficient filtration to clean air barrier, maximally reduces dust diffusion, improves work environment, reduces threat to operator health.

In certain embodiments, the disclosed sealant comprises a one-component, closed-cell, semi-foam, sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed sealant can also be formulated to be smoke-resistant and flame-resistant.

The invention discloses an annealing furnace opening circulating dust removal device and a using method thereof, and belongs to the technical field of plate glass manufacturing. The device comprises a dust collection and air draft pipeline, the dust collection and exhaust pipeline is arranged in the circumferential direction of an outlet of the annealing furnace opening; an air suction opening is formed below the dust collection and air suction pipeline; the suction opening is connected with a driving device; and the driving device is connected to an air inlet of the dust collection and air draft pipeline. Gas around the outlet of the annealing furnace opening is exhausted from top to bottom through the dust collection and air draft pipeline to form an air barrier, due to the blocking effect of the air barrier, external small-particle dust is difficult to penetrate through the barrier to enter the annealing furnace, air at the annealing furnace opening circulates from top to bottom, and peripheral dust cannot be sucked back into the annealing furnace any more. Pollution in the annealing furnace can be effectively avoided, and surface cleanness of the glass plate is guaranteed; the device is simple in structure and convenient to operate and implement.

The present invention belongs to the technical field of pressure roller manufacturing and discloses a method for manufacturing a multi-piece pressure roller. The method comprises: step S1, providing a long strip of extruded profile having a preset external profile and internal longitudinal airway holes and longitudinal communication holes through an integrated extrusion process; step S2, cutting the profile as needed to obtain a pressure roller core; step S3, processing a piston hole connected to the communication hole; step S4, providing an air barrier within the communication hole to separate air-controlled partitions; step S5, processing a channel to connect the airway hole to the corresponding air-controlled partition; and step S6, completing the assembly of the piston and pressure roller sheet. The present invention significantly reduces manufacturing costs and cycle times through the "extrusion molding + modular configuration" approach, and achieves flexible and adjustable air-controlled partitions, thus having significant economic and technical advantages.

The utility model discloses a device for preventing odor tainting of a kitchen flue, which comprises a box body and a driving mechanism, the box body is arranged at the top of a range hood, an annular water seal tank is formed at the bottom of the box body, a lower exhaust passage is formed in the middle of the annular water seal tank, and the lower exhaust passage is communicated with an exhaust hole at the top of the range hood. An upper exhaust channel connected with the smoke exhaust pipe is formed in the top of the box body and communicates with an inner cavity of the box body. A water seal cover capable of moving up and down in the axial direction is arranged on the annular water seal tank, the water seal cover moves downwards so that air between the lower exhaust channel and the inner cavity can be blocked through water in the annular water seal tank, and the water seal cover moves upwards so that air blocking between the lower exhaust channel and the inner cavity can be removed; the driving mechanism is arranged in the inner cavity and connected with the top of the water seal cover so as to drive the water seal cover to move up and down in the axial direction. According to the utility model, the water seal structure is arranged on the smoke exhaust channel of the range hood, so that the sealing performance of the smoke exhaust channel is improved, and oil smoke in a flue can be prevented from entering a room.