38 results about "Air well" patented technology

The utility model discloses a wind tower internal part capable of adjusting an air outlet angle, and relates to the field of ventilation shaft shutter air outlets. The window comprises the window frame, the window frame comprises the first frame, the second frame, the top frame and the bottom frame, the abutting mechanism is installed on the window frame, through the abutting mechanism and a screwing bolt, by means of the threaded connection characteristic of the screwing bolt and the abutting block, firstly, accurate position adjustment of the abutting block in a cavity can be achieved, and the abutting block can be tightly screwed along with gradual screwing of the bolt. The abutting block stably moves outwards in the cavity under the thrust action of the threads until the surface of the abutting block tightly abuts against the inner wall of the installation groove, it is guaranteed that the initial position between the window frame and the installation groove is fixed in the process, the assembly gap between the window frame and the installation groove is effectively reduced, and meanwhile the assembly efficiency is improved. Stable supporting points are provided for the air outlet shutters through firm abutting of the abutting blocks, and the stability and firmness of the whole installation structure are remarkably improved.

1. The name of the design product: roof rig (four oil cylinders and two vertical columns). 2. The use of the design product: used for the construction of ventilation shaft, chute shaft, cable and water pipe arrangement shaft in underground mine. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention discloses an energy-saving air conditioning system for a building. The energy-saving air conditioning system comprises a ventilation shaft, a tunnel air pipe, a TLambert wall, a sky radiation layer and a heat storage layer. The heat storage layer is arranged at the top of the ventilation shaft; the TLambert wall is arranged on the sunny side of the ventilation shaft and is relatively close to the top of the ventilation shaft; the sky radiation layer is arranged on the shady side of the ventilation shaft and is relatively close to the bottom of the ventilation shaft; the tunnel air pipe is used for being communicated with or disconnected from the bottom of the ventilation shaft so that temperature difference can be formed in the ventilation shaft and air can be driven to flow from bottom to top. A condensation face is arranged in the ventilation shaft, and the condensation face is located on an air flowing path and used for dehumidifying air. A coupled passive cooling and dehumidifying building energy-saving air conditioning system is formed by tunnel air, sky radiation, a Tembert wall, phase change heat storage and a condensing surface, and the cooling and dehumidifying effects can be achieved by completely depending on renewable low-grade natural energy without mechanical driving such as a fan or a compressor.

The application discloses a kind of ventilation parameter processing method and system for the whole world water-rich karst tunnel small section multi-shaft, comprising the following steps: determining small section shaft clearance diameter D And single well ventilation capacity, and determine the upper limit of main hole design wind speed to obtain the maximum wind capacity of main hole;Select control need air volume index, calculate the air volume and establish relative index, determine the critical distance L 1 when relative index reaches limit value L First exhaust shaft is arranged near L 1 And downstream air supply shaft constitutes "one exhaust one supply" ventilation unit, according to different section relative index check and iterative arrangement of multiple groups of shafts form shaft group, so that downstream available air volume meets the next partition air volume.The application replaces the traditional large-diameter ventilation shaft by adopting small-section shaft group suitable for mechanized construction, which can reduce the construction risk of shaft in the whole water-rich karst section, reduce the exposure of underground personnel, and improve the engineering applicability and construction safety.

A ventilation system for an underground tunnel pumped storage space includes a working shaft and a ventilation shaft that directly lead to the underground tunnel space. The working shaft and the ventilation shaft are interconnected, forming an inlet and outlet for the air to circulate in the underground tunnel. The underground space is divided into a water-filled space and a non-water-filled space by a waterproof gate wall. Both spaces are connected to the main ventilation channel formed by the working shaft and the ventilation shaft. In order to meet the different ventilation needs of the two separated underground spaces, the present invention proposes a ventilation system that meets the needs of the underground water-filled space and the non-water-filled space. The present invention sets different ventilation processes based on the layout differences and functions of the underground tunnel space to meet the ventilation and air exchange needs of each stage of operation and shutdown and maintenance, realize the physical isolation of the dangerous gas accumulation space and the equipment operation space, ensure the safety of the equipment and personnel areas, greatly reduce the explosion-proof performance requirements of the area for the equipment, reduce the one-time investment cost, and at the same time reduce the space for forced ventilation and reduce energy consumption during operation.

The invention discloses a pump-drive-free super-long gravity assisted heat pipe type refrigerating system applied to a deep mine, and belongs to the technical field of mine heat management and energy conservation. The system comprises a super-long gravity heat pipe, an air cooler, a condensation evaporator, a surface air cooler and related pipelines. The super-long gravity heat pipe extends to a mine tunneling layer, underground heat is absorbed through the air cooler, a working medium is evaporated into steam in the heat pipe and naturally ascends to the condensation evaporator, and the heat is transmitted to the working medium of the heat pump at the position. And the liquid working medium is further condensed by the surface air cooler and enters circulation. The system uses gravity and steam pressure difference to drive the heat pipe working medium to circulate, a pump does not need to serve as a power source, underground equipment is simplified, and energy consumption is reduced. Meanwhile, the system can be flexibly arranged in a ventilation shaft or other proper positions according to the actual situation of the mine. The system is simple in structure, reliable in operation, energy-saving and efficient, and meets the requirements of efficient cooling and heat management of deep mines.

The present application relates to the technical field of gravel filling well completion in drilling engineering, and particularly relates to a self-driven rotary annular gravel throwing device and a synchronous well washing method, which comprises a moving platform, a gravel storage hopper integrated on the moving platform, a slurry pump, a water gravel pipe, an annular gravel thrower, a self-driven rotary conical blocking cap, a slurry suction pipe, a slurry suction pump, a mud purification device and an air compressor; a hoisting arm is arranged at the front end of the moving platform, a hoisting cable is arranged at the front end of the hoisting arm, the lower end of the hoisting cable is connected with the slurry suction pump and the slurry suction pipe, and the hoisting cable can be telescoped up and down to drive the slurry suction pump and the slurry suction pipe to move up and down in the well wall pipe, and the method comprises S1, installation and early preparation of the self-driven rotary annular gravel throwing device; S2, self-driven rotary annular gravel throwing; S3, air well washing; and S4, continuous mud purification, and the self-driven rotary uniform gravel throwing and water flow guidance compaction do not need additional power.

A passive flood barrier that self-deploys to prevent or limit the passage of flood water through an opening in a structure such as a ventilation shaft. The passive flood barrier device includes a buoyant volume extending across at least a portion of the structural opening. The buoyant volume is configured to float in response to flood water near the structural opening. A flexible flood barrier is coupled to the buoyant volume. The flexible flood barrier is deployable from the buoyant volume as the buoyant volume travels upward in response to flood water near the structural opening.

The application discloses a building energy-saving air conditioning system, which comprises a ventilation shaft, an underground air pipe, a Trombe wall, a sky radiation layer and a heat storage layer; the heat storage layer is arranged at the top of the ventilation shaft; the Trombe wall is arranged at the sunny side of the ventilation shaft and is arranged close to the top of the ventilation shaft; the sky radiation layer is arranged at the shady side of the ventilation shaft and is arranged close to the bottom of the ventilation shaft; the underground air pipe is used for being communicated with or being cut off from the bottom of the ventilation shaft, so that the inside of the ventilation shaft can form a temperature difference and drive air to flow from bottom to top; a condensing surface is arranged in the ventilation shaft and is located on an air flow path, so as to dehumidify the air. The building energy-saving air conditioning system is coupled with passive cooling and dehumidification and is composed of the underground air pipe, the sky radiation, the Trombe wall, the phase change heat storage and the condensing surface, and can realize the effects of cooling and dehumidification by relying on renewable low-grade natural energy without the mechanical driving of a fan or a compressor.

The present application belongs to the technical field of receiving well, and particularly relates to a shuttle-shaped receiving well, which comprises a receiving well main body, a bottom plate arranged at the bottom of the receiving well main body, a top pipe insertion hole arranged on the side of the receiving well main body and communicated with a top pipe, a support plate arranged in the receiving well main body, a climbing assembly arranged on the support plate, an upper cover component arranged on the upper end of the receiving well main body, and a shuttle-shaped structure of the receiving well main body. The shuttle-shaped structure of the receiving well main body has good streamline and a water resistance ratio of 3%, which meets the requirement that the water resistance ratio is not greater than 15%. In addition, the receiving well main body can also be used as a ventilation well, and the upper opening of the receiving well main body is provided with an upper cover component to prevent rainwater, floating objects and the like from falling into the receiving well main body, so that the cleanliness and relative dryness of the receiving well main body are maintained.

A passive flood barrier that self-deploys to prevent or limit the passage of flood water through an opening in a structure such as a ventilation shaft. The passive flood barrier device includes a buoyant volume extending across at least a portion of the structural opening. The buoyant volume is configured to float in response to flood water near the structural opening. A flexible flood barrier is coupled to the buoyant volume. The flexible flood barrier is deployable from the buoyant volume as the buoyant volume travels upward in response to flood water near the structural opening.

This invention relates to the field of basement ventilation shaft technology, specifically to a basement ventilation shaft flush with the ground. It includes a shaft body, which comprises side plates and a bottom plate; the side plates and bottom plate enclose a shaft cavity, the top of which is flush with the ground; a duct is provided at the side plate; one end of the duct is connected to a fan in the basement, and the other end is connected to a downward-curving elbow, the lower end of which has a downward-extending mounting pipe; an air outlet is formed through the mounting pipe, and a floating component is movably installed inside the mounting pipe. Addressing the issue of backflow prevention from the fan, this invention utilizes a downward-curving elbow connected to the duct to prevent rainwater from flowing into the duct after falling from the top, thus providing better protection.

1. The name of the design product: anti-well drilling rod. 2. The use of the design product: in the construction of small mine shaft, underground pipeline ventilation well construction, micro-slip shaft excavation and water and electricity tunnel engineering in restricted space inclined shaft construction, cooperate with equipment to drill guide hole or inclined shaft to meet the needs of mining, ventilation, material transportation and pipeline laying. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. The top view, bottom view and front view are the same, and the top view and bottom view are omitted.

The utility model relates to the technical field of ventilation devices, in particular to an underground fire engineering ventilation device. According to the technical scheme, the ventilation system comprises a ventilation shaft and further comprises a ventilation pipe fixedly communicated with one side of the ventilation shaft, a filter pipe is arranged in the ventilation pipe, filter screens are fixedly installed in the filter pipe and comprise a low-efficiency filter screen, a medium-efficiency filter screen and a high-efficiency filter screen, and a plurality of sets of cleaning brushes are rotatably installed in the filter pipe. According to the utility model, dust of particles with different sizes can be filtered in a grading manner, fine dust is prevented from entering the fan, the filtering effect is improved, the abrasion to the fan is reduced, and the service life of the fan is prolonged; meanwhile, dust is prevented from being accumulated on the filter screen through the cleaning brushes on the two sides of the filter screen, the permeability of the filter screen is kept, meanwhile, the vibration motor is matched to promote the dust attached to the filter screen to fall off, and the cleaning effect on the filter screen is further enhanced.

The utility model discloses a garbage collection and transportation structure suitable for high-rise building construction, and relates to the technical field of building structures. The garbage collection and transportation structure suitable for high-rise building construction comprises a building main body, the building main body is provided with a ventilation shaft, the ventilation shaft is configured to be a transportation channel for transporting garbage, and a keel frame is arranged on each floor of the building main body around an opening of the transportation channel; and the keel frame is provided with a shielding door plate and a movable door plate which are used for shielding the opening of the transportation channel. According to the garbage clearing and transporting structure suitable for high-rise building construction, the ventilation hoistway of the building body serves as a transporting channel for transporting garbage, and the beneficial effects of being high in clearing and transporting efficiency, small in raised dust and low in cost are achieved.

The invention discloses a ventilation shaft of an urban underground comprehensive pipe gallery, and belongs to the technical field of urban underground infrastructure, the ventilation shaft comprises a shaft mechanism, the lower end of the shaft mechanism is connected with a ventilation pipe gallery, the upper end of the shaft mechanism protrudes out of the ground, and a ventilation mechanism is installed in the shaft mechanism; according to the underground pipe gallery cleaning device, the parts such as the ventilation mechanism, the transmission mechanism and the wiping mechanism are arranged, a servo motor of the ventilation mechanism drives ventilation fan blades to achieve the ventilation function, and meanwhile an output bevel gear and a transmission gear are synchronously driven to be in meshing transmission; the two symmetrical transmission mechanisms are driven by the transmission shaft to operate, the inner cleaning brush is driven to slide along the guide frame through linkage of the first connecting rod and other components, the inner cleaning brush is in linkage with the outer wiping brush of the wiping mechanism through the magnetic adsorption effect to synchronously move, and the inner cleaning brush and the outer wiping brush synchronously wipe the inner wall and the outer wall of the light-transmitting window correspondingly.

The present invention provides an upward horizontal filling mining method based on the joint mining of dual transport tunnels, which belongs to the technical field of underground mining methods for metal deposits. The mining method divides the mining unit into three steps for mining. The first and second steps adopt the upward horizontal layered filling mining method, and the third step adopts the upward horizontal approach filling mining method. The mining project of this mining method is divided into an outer segmented transport tunnel and an inner segmented transport tunnel. The outer segmented transport tunnel is first constructed as a passage connecting each plate area, and then the inner segmented transport tunnel is constructed to construct a mining field connecting road to mine each mining field, thereby reducing the number of forks in the outer segmented transport tunnel and ensuring the stability of the outer segmented transport tunnel in long-term service. A pedestrian ventilation shaft is set up between the outer segmented transport tunnel and the inner segmented transport tunnel. The polluted air is collected into the return air tunnel through the pedestrian ventilation shaft and does not flow through the outer segmented transport tunnel, which can greatly improve the ventilation status of the approach. This method has the advantages of fewer openings in the outer segmented tunnel, high safety and good ventilation.

The invention discloses a ventilation control method, device and equipment for a refuse landfill and a medium, and the method comprises the steps that a target refuse landfill is scanned through a geological radar to obtain first radar data; constructing a permeability coefficient three-dimensional model based on a first radar data method; determining permeability attributes of different areas in the target refuse landfill based on the permeability coefficient three-dimensional model; and corresponding ventilation device configuration parameters are determined based on the permeation attributes of all the areas in the target refuse landfill, and ventilation control is conducted on the corresponding areas of the target refuse landfill based on all the ventilation device configuration parameters. According to the method, the permeability model for the refuse landfill is automatically constructed based on the radar data, the configuration parameters of the ventilation devices such as the ventilation shaft are determined based on the permeability parameters of the different areas corresponding to the model, and compared with a scheme of adjusting parameters according to artificial experience, the permeability uniformity of the refuse layer in the refuse landfill can be effectively improved; further, the garbage degradation period is shortened.

The utility model belongs to the technical field of building structures, and particularly discloses a basement ventilation shaft structure. A ventilation shaft of the structure is vertically arranged on one side of an underground fan room and communicated with the underground fan room, and a basement top plate is arranged at the top end of the underground fan room; the transverse air duct is transversely arranged between a basement top plate and a ground structure or transversely arranged below the ground structure on one side of the basement top plate, the vertical ventilation opening is vertically arranged above or on one side of the basement top plate and communicated with the outside, and the two ends of the transverse air duct are communicated with the ventilation shaft and the vertical ventilation opening respectively. The shutter is arranged at the top end of the vertical ventilation opening and is higher than the ground. By reasonably arranging the ventilation shaft structure, the influence of the ventilation shaft outlet on the upper building and the outdoor general drawing arrangement is effectively solved, so that the ground position of the basement ventilation shaft can be flexibly selected according to the upper building and the outdoor general drawing arrangement; the device has the characteristics of simple structure, convenience in construction, flexibility in arrangement and small influence on the existing building.

The air shaft negative pressure pipe water collecting and discharging device comprises a water storage barrel, an air inlet pipe, an air outlet pipe, a water discharging pipe, a filter material, a first electric valve, a manual valve and a controller, the upper left portion of the water storage barrel is fixedly communicated with the air inlet pipe, the lower right portion of the water storage barrel is fixedly communicated with the air outlet pipe, and the bottom of the water storage barrel is fixedly communicated with the water discharging pipe; a permeable filter material is mounted in the middle of the water storage barrel. When the device is used, condensate water contained in air is gathered to the bottom of the water storage barrel and is discharged from the drainage pipe until the manual valve is opened, other impurities can be intercepted and filtered by the filter material, and blockage of the negative pressure pipe in the subsequent process is reduced. The float bowl can move up and down through water collection, so that the valve element rotates forwards and backwards through the polished rod, the rack, the gear and the valve rod, the through hole is controlled to be communicated or not, automatic water drainage and water collection are achieved, and compared with manual operation, the automatic water drainage and water collection device is simpler, more convenient and more efficient.

The utility model relates to a high temperature dechlorination oven, including box, track piece, moving platform, thermal cycle mechanism, install moving platform with track piece in the box, track piece is used for moving platform activity adjustment, starts heating pipe to the heating in heating box, heating box bottom is equipped with heat conduction plate, transmits the heat to the box, and starts the air inlet fan, is equipped with the filter screen at the air inlet fan air inlet, intercepts sundries, and air passes through the heat insulation air inlet pipe and enters the heat pipe, and the heat pipe is in the heating box and is distributed in the shape of a snake, prolongs the air circulation path, makes the air better heat, and hot air is discharged from the air frame through the exhaust pipe piece, and the air frame blows the hot air to the vice seat and the main seat, because the arc surface of the vice seat surface near the air frame side, can guide the hot air upwards to the object of dechlorination, and the object is placed on the porous ceramic frame, because the porous ceramic frame is modified through the surface, the capture ability to the chlorine-containing gas is enhanced through the chemical adsorption, and the dechlorination effect will be significantly improved.

The invention discloses a containment functional channel, which comprises at least two groups of passage ventilation channels, each group of passage ventilation channels is symmetrically arranged around a containment central functional area, and at least one group of passage ventilation channels is used as a first group of passage ventilation channels, is located in a water tank coverage area and is isolated from a water tank through an entity boundary. The rest passing ventilation channels located in the area not covered by the water tank serve as second-class passing ventilation channels, each passing ventilation channel comprises a pedestrian stairway and a facility channel, the pedestrian stairway and the facility channel are attached to share one side entity boundary, and each passing ventilation channel penetrates through all layers in the containment in the vertical direction; the vertical shaft structure of the facility channel serves as a ventilation shaft to be communicated with the air supply outlets of all the layers. The channel integration degree is high, the layout is reliable and reasonable, and efficient utilization of space is achieved through function integration. The invention also provides a containment system.

The utility model discloses a data safety device for on-demand ventilation and heat supply of a high-altitude and high-cold mine. Comprising a frequency conversion fan (1) fixed at a ventilation well mouth and a footrill mouth, an air door (2) fixed at a branch of a ventilation roadway, waste heat recovery equipment (3) fixed at an air return well mouth and a roadway, electric heating equipment (4) fixed at an air inlet well mouth and the footrill mouth, and a temperature sensor (5) and an air speed sensor (6) which are arranged in a mine roadway and a shaft, the application server (8), the controller (9) and the industrial personal computer (10) are connected with the data security module (7); single-channel communication and risk isolation of the safety side and the edge side are strictly controlled, all equipment, control and information data integration are reliable and safe, on-demand ventilation and normal operation of a heat supply device are guaranteed, on-demand ventilation and heat supply are adjusted in real time for the underground environment, energy consumption is reduced, meanwhile, a safe and stable operation environment is provided, and the energy consumption is reduced. And the safety of underground operation in an extreme environment is ensured.

The flushing device comprises a first pipeline, the two ends of the first pipeline are connected with a water inlet end and a water outlet end respectively, the water inlet end at least comprises two water inlets, and the first pipeline is provided with a first angle control assembly and a second angle control assembly which are used for adjusting the water spraying direction of the water outlet end; a mounting point close to the water inlet is formed on the water inlet end; during installation, the installation point of the water inlet end is installed on the inner wall of the storage tank, so that the flushing device is close to the ventilation shaft. The flushing device is arranged at the top of the storage pond and is arranged at the same position as the ventilation shaft, daily maintenance and replacement of the flushing device are facilitated, operation can be performed without emptying pond water, and therefore it is ensured that the flushing function of the storage pond can be continuously and effectively operated.

The utility model relates to the technical field of fire protection engineering, in particular to an underground fire protection engineering ventilation and noise reduction device which comprises a ventilation shaft, sound absorption cotton, an air inlet assembly, a discharging assembly, a control assembly and an air pipe silencer. The sound-absorbing cotton is mounted on the ventilation shaft; the air inlet assembly is mounted in the sound-absorbing cotton; the discharge assembly is mounted on the ventilation shaft; the control assembly is mounted on the ventilation shaft; the control assembly comprises a control panel, the control panel is connected with a clamping plate, the control panel and the clamping plate are both connected with a sealing sleeve and a connecting block, the connecting block is provided with a sleeve body, the sleeve body is installed at the driving end of an electric push rod, and the electric push rod is installed on the outer wall of the ventilation shaft through a support. And the air pipe silencer is mounted in the ventilation shaft. The clamping plate and the control plate penetrate through the opening c to move into the ventilation shaft, air in the underground fire engineering is exhausted through cooperation of the exhaust fan b, the situation that the air in the ventilation shaft flows back into the underground fire engineering is reduced, and the ventilation effect is improved conveniently.

The invention discloses a multi-scale composite greenbelt cooling structure and a construction method thereof, and the construction method comprises the following steps: constructing a ground surface cold storage layer composed of a permeable surface layer, a capillary cold storage layer and a cold source substrate layer to form a continuous evaporation cold source; an evapotranspiration enhanced vegetation layer of a vertical structure of arbor, shrub, grass and ground cover is configured to synergistically increase the air humidity and form a sparse ventilation passage; installing an air guide-shading composite layer with a gap type shading grating and adjustable air guide blades to attenuate radiation and guide airflow; an aerodynamic coupling structure comprising a vertical ventilation shaft and a horizontal ventilation gallery is constructed so as to collect and directionally convey cold air; the air guide blades and the humidification or water supply assembly are dynamically adjusted on the basis of environmental parameters so as to optimize cooperative operation, the corresponding system comprises all the layers and an intelligent control system which are in space coupling, and continuity, stability and adjustable output of the cooling effect in the limited green space are achieved through multi-mechanism space coupling and process collaboration.

The invention relates to an arrangement for attaching a tubular gas sampling probe (1) with at least one gas sampling inlet opening (2) arranged at the end of the tube to a channel wall defining a gas flow channel, the channel wall having a channel wall opening whose shape and size allow a section of the gas sampling probe (1) having the gas sampling inlet opening (2) to pass through.The arrangement comprises the following components: - the gas sampling probe (1), - a plate-shaped fastening element (13) that can be attached to the channel wall and has an opening which, when attached to the channel wall, completely overlaps the channel wall opening and has an internal thread, - a support tube (9) which has at its tube end a joining contour (11) with an external thread contoured to the internal thread for detachably tight joining to the opening of the plate-shaped fastening element (13), - a fastening element (10) attached to the support tube (9) for detachably fixing the gas sampling probe (1) inside the support tube (9), and - at least one line marking (8) attached to the gas sampling probe (1) as well as to the support tube (9) and / or to the plate-shaped fastening element (13).8'), which indicates at least an orthogonal distance to the channel wall between the gas sampling inlet opening (2) and the channel wall, as well as a relative rotational position between the gas sampling probe (1) and the support tube (9). The invention also relates to the use of this arrangement for air sampling in an air duct of a ventilation system.

The application discloses a low-carbon mine cold and heat energy comprehensive utilization system, which comprises a gas-water heat exchanger, three electric compression heat pumps, an electric ice maker, an ice storage tank, a normal-temperature surface cooler, a low-temperature surface cooler and an ultralow-temperature surface cooler, wherein outdoor air pipe networks are connected with the normal-temperature surface cooler, the low-temperature surface cooler and the ultralow-temperature surface cooler respectively, the normal-temperature surface cooler, the low-temperature surface cooler and the ultralow-temperature surface cooler are connected in sequence and are connected into a ventilation shaft, mine fresh air is connected with a return air shaft after being heated by a mine ventilation system after entering the ventilation shaft, return air of the return air shaft is discharged into the atmosphere or is discharged into the gas side of the gas-water heat exchanger to release heat, and the ice storage tank is connected with the electric ice maker and the ultralow-temperature surface cooler through pipelines to form a loop. According to the different characteristics of air temperature in different periods under the natural environment, the natural cold source is fully utilized for underground cooling and ice making and storage, and the operation power consumption is saved; the mine return air waste heat is recycled for mine auxiliary heating and shaft air anti-freezing preheating.

The utility model discloses an air well washing structure of a dewatering well, which relates to the technical field of well washing of dewatering wells, has the advantage that a well washing device is convenient to lift, and adopts the technical scheme that the air well washing structure comprises a mounting ring and a well washing device body, the mounting ring is placed on the ground and is positioned at a well mouth of the dewatering well, and the well washing device body is positioned in the dewatering well; the end, away from the well flushing device body, of the pull rod vertically extends upwards out of the dewatering well, and a pushing piece used for driving the pull rod to vertically move up and down is arranged on the mounting ring.

The urban underground comprehensive pipe gallery ventilation shaft with the protection structure comprises a ventilation shaft body, a ventilation opening is formed in the top of the ventilation shaft body, and a mounting face is arranged on the peripheral side of the ventilation opening; the installation cover is installed on the installation face in a detachable connection mode, and the installation cover covers the ventilation opening; the dustproof cover is arranged on the outer side of the mounting cover in a sleeving mode in a detachable connection mode, matched ventilation holes are formed in the mounting cover and the dustproof cover, and a dustproof net is arranged on the ventilation holes of the dustproof cover; and the fan equipment is arranged in the mounting cover and conveys air into the ventilation opening through the ventilation hole. The detachable mounting cover is arranged on the mounting surface on the outer side of the ventilation opening, so that the ventilation opening is protected. When the fan equipment sucks and extracts outside air, dust and impurities in the outside air can be isolated by the dustproof net at the ventilation hole of the dustproof cover, so that the dust is prevented from being accumulated at the ventilation hole and the fan equipment, and the effect of preventing dust accumulation is achieved. And moreover, the dustproof cover and the mounting cover are detachably connected, so that the dustproof cover and the dustproof net can be detached and cleaned conveniently, and the dustproof net is prevented from being blocked.