1233results about "Vertical ducts" patented technology

A trench drain includes a trench, a grating seat and a grating hingedly connected to the trench. The trench has a base wall with peripheral side walls extending upwardly therefrom and an outwardly-extending peripheral flange. The grating seat is configured to receive the grating. The peripheral side walls of the trench have a pair of opposing elongated slots formed therein and the grating has a pair of posts on opposing ends thereof. Each of the pair of posts on the grating are received in a respective one of the pair of opposing elongated slots of the trench to establish an axis of rotation.

The utility model discloses a mechanical pressurized air supply structure for an antechamber of a building, comprising an air inlet pipe, a pressurized air supply fan, an electric regulating valve, a 70°C fire damper, an electric normally closed valve, a pressurized air supply port, a residual pressure sensor, an air supply main pipe and an air supply branch pipe, wherein the air inlet pipe and the pressurized air supply fan are arranged in a special fan room, and the air supply main pipe is laid in a civil engineering air shaft; the air supply branch pipe passes through a partition wall of the civil engineering air shaft and is laid on the top of an upturned beam bottom of an antechamber, the air supply branch pipe is connected with the air supply main pipe, the air inlet pipe is connected with the pressurized air supply fan, the pressurized air supply fan is connected with the air supply main pipe through the electric regulating valve and the 70°C fire damper in sequence, and the air supply branch pipe entering the antechamber of each floor is provided with an electric normally closed valve and a pressurized air supply port. The utility model arranges an upturned beam at the partition wall of the civil construction air shaft so that the top of the pressurized air supply branch pipe is close to the upturned beam and the bottom is almost level with the bottom of the top plate of the front room, and is laid to connect to the front room. The air duct occupies a small net height of the front room, and at the same time, a suspended ceiling decoration is adopted to eliminate the influence of the air supply branch pipe extending into the front room on the visual impact of the front room.

The utility model relates to a lighting, heat-insulating and waterproof window well of a building and belongs to the technical field of window wells. Comprising a basement wall and a lighting assembly, window wells are arranged on the basement wall, the lighting assembly comprises lighting windows and suspended ceilings, the lighting windows and the suspended ceilings are located at the tops and the bottoms of the window wells respectively, the window wells comprise the upper window wells and the lower window wells, and the lower window wells are in a horn shape; a waterproof heat preservation assembly is arranged between the window well and the basement wall, a drainage pipe penetrating through the waterproof heat preservation assembly is arranged in the basement wall, the waterproof heat preservation assembly comprises a waterproof roll layer, a cement mortar smearing layer and a graphite polystyrene board, and the cement mortar smearing layer and the graphite polystyrene board conduct heat preservation on the window well. According to the building daylighting heat-preservation waterproof window well, the daylighting efficiency and uniformity are improved through the design of the outwards-convex-pyramid-shaped daylighting window and the horn-shaped lower window well, the waterproof heat-preservation assembly is combined with the graphite polystyrene board, heat transfer is effectively prevented, the heat-preservation performance is enhanced, and meanwhile the waterproof effect is improved through the waterproof roll layer and the cement mortar smearing layer.

The utility model relates to the technical field of ventilation pipelines, and discloses a smoke prevention and exhaust air pipe used in a vertical piping shaft, which comprises a smoke prevention and exhaust air pipe body and mounting boxes fixed on the front side and the rear side of the inner wall of the smoke prevention and exhaust air pipe body, and further comprises driving motors fixed at the bottoms of the inner walls of the mounting boxes, a threaded rod is rotationally connected to the upper portion of the inner wall of the mounting box, the bottom end of the threaded rod is fixedly connected with an output shaft of the driving motor, and a lifting block is slidably connected to the upper portion of the inner wall of the mounting box. The air pipe has a cleaning function, the inner wall of the pipeline can be automatically brushed at regular intervals through the built-in automatic cleaning system, the cleaning efficiency is greatly improved, the system shutdown time caused by manual cleaning is shortened through automatic cleaning, continuous and effective operation of a smoke prevention and exhaust system is guaranteed, and the service life of the air pipe is prolonged. Oil dirt and impurities on the inner wall of the pipeline are regularly cleaned, the pipeline can be kept unobstructed, and the smoke exhaust efficiency of the smoke prevention and exhaust system is improved.

The utility model relates to the technical field of underground garage exhaust fans, and particularly discloses a multi-cavity assembly type electromechanical integrated air and smoke exhaust machine room for an underground garage, which comprises a body, an overhaul opening is arranged at the bottom of the body, one side of the overhaul opening is connected with an overhaul door, and one side of the body is provided with a carbon monoxide detector. An indicating lamp is arranged on one side of the body, a connecting frame is arranged at the top of the body, an air inlet is formed in one side of the body, an air inlet cavity is formed in one side of the interior of the body, a fan cavity is formed in the middle of the interior of the body, an air and smoke exhaust fan is arranged in the middle of the fan cavity, an air exhaust cavity is formed in one side of the interior of the body, and an electric cavity is formed in one side of the body. The two ends of the air and smoke exhaust fan are connected with the air inlet cavity and the air exhaust cavity.

The invention belongs to the technical field of added elevators, and discloses a fast-assembly type added elevator steel structure main body and a preparation and assembly method thereof, and the fast-assembly type added elevator steel structure main body comprises a hoistway, a door frame and a corridor. The hoistway is composed of four vertical stand columns and a plurality of transverse beams, the ends of the beams are connected with the connecting faces of the stand columns through connecting pieces, each connecting piece comprises a pair of triangular pieces formed by three steel plates perpendicular to one another, a first plate is connected with the stand columns, a second plate is connected with the beams, and a third plate is an inclined strut reinforcing rib. The door frame comprises door head steel beams between the front stand columns, sill steel beams and landing door stand columns between the sill steel beams, the corridor is connected with the outer sides of the sill steel beams, and through holes in the ends of the edge beams are matched with kidney-shaped holes of the mounting bases to adjust the position. The square pipe joints of the front stand column and the rear stand column are staggered in position. The device is fast to install, stable in structure, convenient to adjust, convenient to overhaul and maintain and suitable for the elevator adding project of the existing building.

The invention provides a ventilation and safety vertical shaft arrangement system for an underground powerhouse of a hydropower station, which comprises main and auxiliary powerhouse holes of the underground powerhouse, a main transformation hole, a tail gate hole and a factory access hole, and the ventilation and safety hole and the factory access hole are communicated with the ground and are communicated with the main and auxiliary powerhouse holes and the main transformation hole. The opening of the ventilation and safety hole is communicated to the ground and serves as an excavation construction channel at the upper part of the main and auxiliary factory building hole, the ventilation and safety hole is respectively communicated with a main transformer hole and a tail gate hole through a main transformer air inlet hole and a tail gate ventilation hole, and a ventilation and safety vertical shaft is arranged in the middle of the ventilation and safety hole and serves as a cavity outlet after water storage of a lower reservoir; and a concrete plug is arranged at a hole section between the ventilation and safety hole opening and the ventilation and safety vertical shaft. The length of the ventilation and safety hole can be shortened, hub arrangement is optimized, project investment is saved, the construction period is shortened, and meanwhile the functions of vehicle passing in the construction period and air inlet, air exhaust and safe evacuation in the operation period can be achieved.

A dark toilet exhaust passage concrete one-time forming structure comprises a large corrugated pipe and multiple sets of outer aluminum alloy modules, a cavity is formed among the multiple sets of outer aluminum alloy modules, the large corrugated pipe is arranged in the middle of the interior of the cavity, and the large corrugated pipe is fixedly connected with the outer aluminum alloy modules through fixing assemblies. The utility model has the beneficial effects that the concrete material is adopted for pouring, so that the concrete exhaust passage has better strength, durability and plasticity, a material basis is provided for manufacturing a one-step formed full-concrete exhaust passage, and the exhaust passage which is firm in structure, smooth in surface and good in sealing property can be manufactured; compared with the traditional material, the concrete material is more environment-friendly, not only has excellent ventilation performance, but also can reduce the building energy consumption and improve the indoor air quality, and adopts the form of the prefabricated member, so that the field installation is simple, convenient and rapid, the construction period is greatly shortened, and meanwhile, the material cost is relatively low, so that the building cost can be effectively controlled.

The floor overhead layer module comprises an upper floor, a lower floor and a plurality of overhead supporting columns, the overhead supporting columns are regularly distributed on the upper surface of the lower floor, and a plurality of first mounting grooves in one-to-one correspondence with the overhead supporting columns are concavely formed in the lower surface of the upper floor; the tops of the multiple overhead supporting columns are installed in the corresponding first installation grooves so as to support and fix the upper floor, and then an overhead space is formed between the lower floor and the upper floor. According to the technical scheme, the technical problems that an existing ground air supply duct structure is difficult to construct, only small-air-volume circulating air supply can be conducted, and the circulating air volume or the circulating number of times of an all-air system cannot be met can be effectively solved.

The invention relates to an assembly type integrated fire-fighting smoke exhaust fan room structure which comprises a machine room enclosure bulkhead cylinder body which is provided with a bottom plate, a first side wall and a second side wall, the first side wall and the second side wall are connected with the bottom plate and vertically arranged in parallel, and the two ends of the machine room enclosure bulkhead cylinder body in the horizontal direction are provided with a first opening end and a second opening end which are oppositely arranged correspondingly; the end cover side wall is provided with a first end cover and a second end cover which are respectively arranged at the first opening end and the second opening end; smoke suction and exhaust ports are formed in the first end cover and the second end cover and are used for being connected with a ventilation pipeline; the machine room access door is arranged on the first side wall or the second side wall and can be opened and closed; the fan is arranged in an internal space formed by the machine room enclosure bulkhead cylinder body, the first end cover and the second end cover; the machine room enclosure bulkhead cylinder body, the first end cover, the second end cover and the machine room access door are all of a prefabricated concrete structure. The fabricated integrated design is adopted, the cost is low, the self weight is light, fireproof performance is achieved, and the advantages of being stable, reusable, attractive and the like are achieved.

The utility model discloses construction waste turnover equipment for high-rise building construction, which relates to the technical field of high-rise waste turnover and comprises a waste pipeline. Construction waste is put in from the interior of the feeding hopper, the construction waste slides to the supporting plate on the inner wall of the waste pipeline, then the servo motor is started, the supporting plate drives the construction waste at the top end to descend synchronously, and through descending of the supporting plate, huge impact force generated when the construction waste falls from a high layer can be effectively avoided; when a limiting groove in a fixing shaft is embedded into a limiting block, a supporting plate is rotationally and obliquely opened through a circular shaft under the gravity of the construction waste, then the construction waste better falls into a material receiving vehicle from a waste pipeline, and the function of transferring the high-rise construction waste is achieved; and a construction site can be kept clean and orderly, and construction obstacles caused by garbage accumulation are reduced, so that the construction progress is accelerated, and the overall construction efficiency is improved.

The utility model relates to a Fab clean room hot exhaust air recovery processing emergency linkage system, which belongs to the technical field of clean room gas circulation and comprises a fresh air inlet pipe, a fresh air supply outlet, a fan filter unit and an exhaust pipe communicated with the outside of a clean room. The recovery pipe is sequentially provided with a circulating fan capable of pumping away hot exhaust air, a cooling mechanism and an air return pipe, the cooling mechanism is a dry coil cooler or a gas-gas heat exchanger or a cold clean gas mixing type cooler, and the system further comprises an automatic control device. The clean air is conveniently recycled, the burden of supplementing fresh air in a clean room is reduced through the recycled clean air, the operation cost of humidity control of a heating ventilation air conditioner is reduced, the cost of cleaning treatment on air is also reduced, and then the production cost is greatly reduced.

The present invention relates to an elevator shaft drag reduction, pressure regulation and energy saving self-adjusting device and its adjustment method, comprising left / right drag reduction, pressure regulation and energy saving devices installed on both sides of the middle of the elevator shaft, the drag reduction, pressure regulation and energy saving device also comprising a displacement sensor, a controller, a speed monitoring device, a windshield, an adjustment plate and a power generation fan, the displacement sensor monitors the position of the car in real time and sends a displacement signal to the controller, the speed monitoring device monitors the wind speed in the shaft in real time and sends a wind speed signal to the controller, the controller sends a control signal to the left / right drag reduction, pressure regulation and energy saving device, and the left / right drag reduction, pressure regulation and energy saving device controls the inclination angle of the adjustment plate, the size of the ventilation area and the angle of the power generation fan. The elevator shaft drag reduction, pressure regulation and energy saving self-adjusting device and its adjustment method of the present invention can effectively reduce the aerodynamic resistance of the car, reduce the piston wind strength in the shaft, and increase the overall safety of the elevator.

The utility model relates to the technical field of platform household elevators, in particular to a platform household elevator of a modular structure. Comprising a bottom hoistway frame module, a middle hoistway frame module and a top hoistway frame module. The number of the bottom hoistway frame module and the number of the top hoistway frame module are each one. The number of the middle shaft frame modules is set to be larger than or equal to 0 according to the actual elevator running height, and the effects that elevator installation can be rapidly achieved, and therefore the installation efficiency and quality are improved are achieved.

The embodiment of the utility model discloses a prefabricated connecting device for an elevator. The prefabricated connecting device comprises a building body structure, a corridor, an elevator shaft structure and a soft copper cable, the building body structure and the elevator shaft structure are both connected with the corridor; a power circuit is arranged on the outer side of the building structure and used for supplying power to users; the corridor is arranged between the building body structure and the elevator shaft structure and used for connecting channels of different floors; the elevator shaft structure is located on the outer side of the building body structure, vertically extends from the first floor to the top floor and is used as a running channel of an elevator. Path intersection exists between the elevator shaft structure and the power line; the soft copper cable is used for electrical connection at the intersection of the elevator shaft structure and the power line and penetrates through the inner wall of the corridor to be communicated with the power line. According to the embodiment of the utility model, potential safety hazards can be reduced, and the elevator and power lines can be conveniently and independently repaired and maintained.

The invention relates to a compressed air storage cavern structure which comprises a drainage layer, a sprayed concrete layer, a reinforced concrete lining layer, a sliding layer and a sealing layer which are sequentially arranged in the direction from outside to inside, and a space used for storing compressed air is formed in the inner side of the sealing layer. Partition walls are arranged in the space on the inner side of the sealing layer to divide the space on the inner side of the sealing layer into a plurality of cavities, balance pipelines are embedded in the partition walls to communicate the adjacent cavities, electric control valves are arranged on the balance pipelines to control connection and disconnection of the balance pipelines, and an air pressure detection element is arranged in each cavity. The compressed air storage cavern structure is high in pressure bearing capacity and high in stability.

A building panel system include vertical members and horizontal members mounted to the vertical member, and a plurality of panel modules. Each of the panel modules includes a building panel, and a hanging member that is connected to the building panel and that is hung on a corresponding one of the vertical members and the horizontal members. The building panels of the panel modules cooperatively form a panel wall that is adapted to be spaced apart from a wall so that an air flow channel is formed between the panel wall and the wall and is adapted to communicate with an external space for air flowing.

A modular step that may be composed of a fiber reinforced thermoplastic, metal, or other material. An embodiment of the modular step has a body and two flanges and is configured in size and shape to be detachably affixed to a window well. The modular step mates to the window using a friction fit, mechanical fasteners or tabs / slots. Multiple modular steps can be attached to a single window well. The modular step can be used to facilitate egress through a window well and improves the visual aesthetics of a window well. Another embodiment of the modular step includes a body and a plurality of flanges and is configured in size and shape to be detachably affixed to a window well, wherein the modular step includes one and only one rung, with the plurality of flanges including two and only two flanges on either side of the rung.

The utility model discloses a tube well pipeline assembly type installation structure which comprises a plurality of tube well pipeline assembly units which are sequentially spliced in the vertical direction, and each tube well pipeline assembly unit comprises a supporting plate, a plurality of sleeves arranged on the supporting plate, a pipeline arranged in the sleeves, a pipe joint arranged at the end of the pipeline and a support fixedly arranged on the outer side of the pipeline. The support is fixedly connected with a building wall through a fastener. The tube well is assembled in a prefabricated manufacturing and on-site mounting mode, and is poured synchronously with a building main body, so that the construction period is short, the construction cost is reduced, the structural stability is high, the construction operation is convenient, and the practicability is high.

A drain assembly comprises a shroud, a shank, and a frame. The drain assembly may further comprise a shim with an angled top surface. The frame may have an angled bottom surface. A rotational orientation of the angled top surface of the shim relative to the shank and a rotational orientation of the angled bottom surface of the frame relative to the shank may be independently adjustable, thereby allowing for the top surface of the frame to be both angularly and rotationally adjusted relative to a central axis of the drain assembly independent of the positional height of the shank. The drain assembly may further comprise a cover having bendable tabs. The bendable tabs may be disposed around a periphery of the cover and may be configured to contact an angled inner surface of an upper bowl of the shroud, such that the bendable tabs bend around the frame, thereby locking the cover onto the frame.

The invention relates to the technical field of building lighting and ventilation, in particular to a ventilation and light guide integrated device which comprises a ventilation pipeline, a light guide pipe, a lighting cover, a rainproof cap and a diffuser, the light guide pipe and the ventilation pipeline are coaxially arranged, and the diameter of the ventilation pipeline is larger than that of the light guide pipe; an annular ventilation channel is formed between the light guide pipe and the ventilation pipeline, the lighting cover is installed at the top end of the light guide pipe, the diffuser is installed at the bottom end of the light guide pipe, the rainproof cap is arranged at the top end of the light guide pipe in a sleeving mode and covers the ventilation pipeline, and an air outlet is formed in the rainproof cap and used for enabling the annular ventilation channel to be communicated with the outside. A plurality of miniature fans are arranged in the annular ventilation channel at intervals, a photovoltaic module is laid on the top face of the rainproof cap and used for providing electric energy for the miniature fans, and the photovoltaic module and the rainproof cap form a whole. And the water leakage risk and the ground landscape damage risk caused by multiple holes are reduced.

The utility model discloses a hoistway connecting structure of an additionally-built elevator of an existing building. The hoistway connecting structure comprises a first connecting support and a second connecting support. One end of the first connecting bracket is fixedly connected with an elevator shaft; one end of the second connecting bracket is fixedly connected with the anchor plate; the anchor plate is fixedly connected with a building; and the first connecting bracket is connected with the second connecting bracket through a bolt. The utility model has the advantages that the structure is simple, the processing cost is low, and the transverse load bearing capacity is good.

This invention relates to the field of deep foundation pit support construction technology, specifically a nested support construction process for deep foundation pit elevator shafts and sump pits. It solves the problem that traditional caisson waterproofing technology is prone to failure due to pit wall collapse in highly permeable gravel strata, making it difficult to create stable construction conditions. The process includes a steel caisson support structure, within which a steel caisson waterproofing structure is nested. This steel caisson waterproofing structure is used in conjunction with the steel caisson support structure for nested construction. This invention, through the nested cooperation of the steel caisson support structure and the steel caisson waterproofing structure, and the injection of a self-compacting concrete filling layer, achieves an integrated support and waterproofing effect during construction. It creates a stable, dry, and enclosed working space in easily collapsible, highly permeable strata, solving the problem of failure of traditional single waterproofing technology and creating safe and reliable conditions for subsequent structural construction.

The utility model relates to the technical field of elevator derricks, in particular to an inward bending steel structure derrick for installing an elevator, which comprises a base, a derrick I and a plurality of derricks II, the derrick I is fixedly arranged at the top of the base, and the plurality of derricks II are fixedly arranged at the top of the derrick I in sequence. A plurality of stand columns and cross beams are arranged in the base, the first derrick and the second derrick, four stand columns distributed in a rectangular shape are arranged in the base, the first derrick and the second derrick, and the cross beams are connected between every two adjacent stand columns through bolts. The stand column is formed by inwards folding a steel plate to form a first bending piece and a second bending piece, the end, away from the second bending piece, of the first bending piece is inwards folded to form a third bending piece, and the end, away from the first bending piece, of the third bending piece is inwards folded to form a first bending connecting piece. According to the utility model, the problems of single structure, insufficient performance and stress concentration of connecting nodes of an elevator derrick upright post additionally arranged in an old community are solved, and the overall strength, stability and safety of the derrick are improved.

The invention belongs to the technical field of exhaust passage systems, and provides a wind cap capable of preventing wind from flowing backwards, which is arranged at an air outlet of an exhaust passage and comprises a base with an air inlet, a rain shielding cover plate arranged above the air inlet, a wind shielding device arranged beside the rain shielding cover plate, and a fixing device for connecting the base, the rain shielding cover plate and the wind shielding device, an air outlet channel communicated with the air inlet is arranged between the rain shielding cover plate and the wind shielding device, an obliquely-arranged flow changing plate is arranged above the rain shielding cover plate, and the included angle between the side, facing the air outlet channel, of the flow changing plate and the rain shielding cover plate is a, 0 degree lt; a < lt >; and 90 degrees. According to the device, the flow changing plate is arranged above the rain shielding cover plate, and the included angle between the side, facing the air outlet channel, of the flow changing plate and the rain shielding cover plate is a, 0 degree lt; a < lt >; under the action of the variable flow plate, the flowing direction of natural wind is changed, the situation that waste gas is blocked from being discharged due to the fact that the natural wind flows backwards into the hood is avoided, and exhaust resistance is greatly reduced.

The invention relates to the technical field of building construction, in particular to a roof passive energy-saving construction system of a vacuum insulated panel and a construction method of the roof passive energy-saving construction system of the vacuum insulated panel. The rubber and plastic heat preservation layer is laid on the fresh air pipe body, and the airtight layer is laid on the parapet wall body. The prefabricated module main body comprises an outer decorative layer, a vacuum insulated panel main body, a waterproof layer and a breathable layer; the prefabricated module has the beneficial effects that a complete roof system is formed by splicing the prefabricated module bodies, the construction process is simplified through the modular design, material waste is reduced, efficiency is improved, and cost is reduced; and the vacuum insulation panel main body and the ventilation layer on the prefabricated module main body are matched with the roof air duct main body, the fresh air pipe main body and the parapet wall main body to prepare additional layers, so that the efficient heat preservation and heat insulation of the whole roof system can be improved, the building energy consumption is obviously reduced, and the green building standard is met.

The invention relates to a structural element for forming a ground covering, in particular in an outdoor area, comprising a rectangular tile (1). According to the invention, a molded-on portion (2) which is made of a plastic material and runs around the edge of the tile like a frame is preferably injection-molded and / or foamed onto the tile.

The utility model discloses a stretchable elevator shaft horizontal blocking structure which comprises a base, a baffle fixedly connected with the base and a stretching mechanism arranged on the baffle, and the stretching mechanism comprises a groove formed in the rear surface of the baffle and a supporting seat arranged in the groove in a sliding mode. The placing seat is arranged on the rear surface of the supporting seat and can bear a maintenance tool; second sliding blocks which are symmetrically distributed are arranged on the side surface of the supporting base, and second sliding grooves for the second sliding blocks to slide are formed in the baffle. Limiting pieces which are symmetrically distributed are arranged on the side surface of the supporting base, and a blocking piece is installed at a groove opening of the groove; the elevator shaft construction maintenance platform has the advantages that by means of the designed stretching mechanism, drawing and storage of the containing base can be achieved, the containing base can stretch out of the groove of the baffle when being drawn, tools needing to be maintained can be placed in the containing base, the elevator shaft construction maintenance efficiency is improved, and a safe operation platform is provided during construction operation.

The utility model discloses a socket-and-spigot joint device for connecting an upper flue and a lower flue. The socket-and-spigot joint device comprises a socket-and-spigot sleeve and a bearing piece, wherein the socket-and-spigot sleeve is used for connecting the upper flue and the lower flue and is of a ladder section type structure; the bearing piece is fixed on a floor above the lower flue and is used for positioning the downward inserting position of the socket-and-spigot sleeve; the socket sleeve comprises an upper bearing section which is connected with an upper-layer flue and has a net size larger than the size of the flue, a lower inserting section which is connected with a lower-layer flue and has a net size smaller than the size of the flue, and a flue connecting section which is connected between the upper bearing section and the lower inserting section and has a net size the same as the size of the flue; the bearing piece is arranged on the outer side of the lower inserting section in a sleeving mode and fixed to the bottom of the flue connecting section. The socket and spigot joint device for connecting the upper flue and the lower flue has the advantages of being convenient to construct, high in safety, low in cost and high in construction quality.

The protection structure comprises a main body and a shielding assembly, a first air inlet is formed in the top wall of the main body, the shielding assembly comprises a cover plate and a supporting piece, the cover plate is supported above the top wall through the supporting piece and is provided with a second air inlet staggered with the first air inlet, and the first air inlet is communicated with the second air inlet. And a drainage mechanism is further arranged on the main body, specifically, a drainage ditch surrounding the periphery of the first air inlet is arranged, falling rainwater is shielded by the cover plate, rainwater falling from the second air inlet is collected into the drainage ditch on the upper side of the top wall to be drained, it is avoided that the rainwater falls into the well through the first air inlet, and the rainproof effect of protecting equipment in the well is achieved.