1882 results about "Ventilation duct" patented technology

The invention relates to the technical field of underground operation safety and ventilation, and discloses an intelligent ventilation safety system suitable for underground operation, which comprises a data acquisition and transmission module used for acquiring underground environment data in real time and transmitting the underground environment data to a control center; the intelligent control module is used for dynamically adjusting the wind speed according to the real-time data so as to ensure that the gas concentration is within a safe range; the optimization decision module is used for calculating and generating an optimal wind speed regulation scheme through an optimization algorithm; the execution feedback module is used for adjusting the wind speed of an underground fan and a ventilation pipeline according to the instruction of the optimization decision module; and the safety early warning module is used for monitoring the change of the gas concentration in the underground environment in real time and sending out an alarm signal when detecting that the gas concentration exceeds the standard. Through intelligent wind speed adjustment and ventilation pipeline control, in combination with real-time data collection and optimization decision, accurate adjustment of the underground environment is achieved, safety and energy efficiency are improved, and the problems of energy waste and inaccurate gas concentration control are avoided.

The invention relates to an automobile seat ventilation parameter determination method and device and a computer. The method comprises the steps that three-dimensional contour information, object physiological information and in-car environment information of a target object on a car seat are acquired; according to the physiological information of the object and the in-vehicle environment information, comfort analysis is carried out, and comfortable physiological information is determined; taking the comfortable physiological information as a target condition, and constructing ventilation duct information of the automobile seat according to the three-dimensional contour information; inputting the comfort physiological information and the ventilation air duct information into a fan control model to obtain initial fan working parameters corresponding to each fan; performing ventilation simulation according to the initial fan working parameters to obtain fan working information corresponding to each fan; for any fan, performing energy-saving optimization on the initial fan working parameters according to the fan working information to obtain target fan working parameters; and fusing the working parameters of each target fan to obtain the seat ventilation parameters of the automobile seat. By adopting the method, the seat ventilation effect can be improved.

The invention discloses ventilation pipeline welding supporting equipment, relates to the technical field of ventilation pipeline welding, and aims at solving the technical problem that a traditional supporting device is insufficient in functionality. A center driving assembly, at least two outer edge supporting assemblies and an end supporting assembly are sequentially arranged on the main body rail frame from the input end to the output end. Welding assemblies are arranged on the outer sides of the two outer edge supporting assemblies; the welding end of the welding assembly is arranged in the gap between the two outer edge supporting assemblies in a penetrating mode. The driving type pushing mechanism has an intermittent pushing state and a continuous pushing state, and the driving type pushing mechanism is matched with the center driving disc frame to conduct continuous rotating work or intermittent rotating work, so that the ventilation pipeline welding supporting equipment conducts welding work on a circular pipeline of a spiral curling preparation technology; the welding work of the circular pipeline of the circular pipeline unit segmented welding preparation process is conducted; through cooperation of the dual-mode driving mechanism and the reconfigurable supporting system, the limitation of the single function of traditional equipment is broken through.

The invention relates to the technical field of laboratory temperature and humidity control. The laboratory temperature and humidity control system comprises a control terminal, a monitoring module, a dynamic prediction analysis module and a partition adjustment module, the monitoring module comprises a temperature sensor arranged on the surface of a wall and equipment, a humidity sensor arranged in a ventilation pipeline, dew point detection units of a fresh air inlet and a return air inlet, a pressure sensor below the ground and a top infrared thermal imaging unit. The dynamic prediction analysis module is used for receiving the equipment calorific value and personnel density information monitored by the monitoring module and outputting a temperature and humidity change trend; the partition adjusting module comprises a temperature control plate array, an air conditioning unit and a humidity adjusting unit, a temperature control plate switches a heat storage / release state through current pulse, and the humidity adjusting unit is used for dehumidification or humidification; the control terminal regulates and controls the partition module according to the prediction result, and intelligent regulation of laboratory temperature and humidity is achieved.

The utility model belongs to the technical field of gas leakage detection, and particularly relates to a carbon dioxide on-site detection device and a carbon dioxide pipeline leakage detection system.The carbon dioxide on-site detection device comprises a ventilation duct, an alarm assembly and a controller, a carbon dioxide detection piece is arranged at the other end of the ventilating duct; the controller is electrically connected with the carbon dioxide detection piece and the alarm assembly. A carbon dioxide field detection device is arranged near a carbon dioxide conveying pipeline, the concentration of carbon dioxide around the carbon dioxide pipeline is detected in real time through a carbon dioxide detection piece, an alarm assembly comprises multiple alarm modes used for sending different alarm signals, and each alarm mode corresponds to different concentration threshold values of the carbon dioxide concentration. The controller is used for switching the corresponding alarm mode according to the concentration threshold value of the carbon dioxide concentration, so that the numerical value of the carbon dioxide concentration is visually reflected, and an operator can take corresponding treatment measures.

The invention discloses an unpowered air purification device based on electrostatic adsorption and negative ion effects, and relates to the technical field of air purification, the unpowered air purification device comprises a ventilation pipeline, an electrostatic adsorption module, a particle capture net, a negative ion release module and the like, a wind scooper guides airflow to enter the electrostatic adsorption module, and a friction ball rubs with an electrode plate to enable the electrode plate to be electrified; particulate matters in the air are adsorbed, falling particulate matters are collected by a liquid collecting box, residual particulate matters are further intercepted by a particulate capturing net, the elastic design is convenient for shaking off and cleaning, and the negative ion release module accelerates the generation of negative ions and purifies the air by utilizing the solar thermal conversion and piezoelectric effect. Efficient air purification is achieved through a multi-stage purification structure, the functions of humidity adjustment, intelligent reminding and the like are achieved, the structure is simple, energy conservation and environment protection are achieved, the device can adapt to various scenes, and an innovative scheme is provided for solving the air pollution problem.

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 discloses a ventilation pipeline pulling closing mechanism which comprises a closing executing mechanism, a first pulling device and a second pulling device, the first pulling device and the second pulling device play a pulling role, and the driving end of the closing executing mechanism is connected with the second pulling device in a pulling mode. An exhaust hole is formed in the side portion of a cylinder of the closing execution mechanism, one end of a closing execution rod is fixedly connected with a second pulling device, and the closing execution rod drives the cover shell to cover the exhaust hole or be away from the exhaust hole. The problems that in the prior art, due to the fact that the whole valve is complex in structure, the valve cannot be smoothly closed, and the closing effect of the valve is easily affected are solved. The ventilation pipeline pulling closing mechanism is reasonable in overall structural design, and adsorption force can be transmitted through the magnet. And the closing execution structure can push the ventilation pipeline to execute the closing and sealing effects.

The utility model discloses a vehicle-mounted wireless charger with a heat dissipation structure, which relates to the technical field of vehicle-mounted chargers and comprises a front shell, an NFC (near field communication) antenna, a support, a coil, a printed circuit board assembly, a rear shell, an outer air duct shell, a fan and a fan shell, the outer air duct shell is arranged above the rear shell, the fan is arranged on the fan shell, and the heat dissipation structure is arranged on the fan shell. The fan shell is connected with the outer air duct shell, the front shell is provided with an air outlet, the rear shell is provided with a splitter, the splitter splits air output by the fan to form two ventilation ducts, one ventilation duct cools charging equipment, and the other ventilation duct cools a charger; the wireless charger is low in heat dissipation cost, simple in structure, compact in layout and relatively small in size, effectively improves the heating and heat dissipation problems of the charger, improves the use performance of the wireless charger, and is favorable for guaranteeing and prolonging the service life of the wireless charger.

The utility model discloses a ventilation pipeline for an air compressor, and relates to the technical field of ventilation pipelines, the ventilation pipeline for the air compressor comprises the air compressor, the top of the air compressor penetrates through and is provided with a first pipeline, and the rear end of the first pipeline is provided with a cooling assembly; the cooling assembly comprises a cooling pipeline which penetrates through the rear end of the first pipeline and is fixedly connected with the rear end of the first pipeline, and the cooling pipeline, the connecting grid pipe, the cooling fan, the circulating pump, the bent pipe and the connecting pipe are matched with one another, so that compressed air enters the cooling pipeline and then is cooled through the cooling fan after entering the cooling pipeline. Water vapor is condensed through circulating cooling of a plurality of connecting grid pipes, so that primary separation of the water vapor and the air is achieved, moisture in the air can be adsorbed through the moisture absorption sponge through mutual cooperation of the arranged shell and the moisture absorption sponge, the moisture is left in the shell, the air continues to be conveyed through a third pipeline, and therefore the water vapor is effectively separated from the air. And gas-water separation is achieved, and electrical equipment cannot be damaged.

The present invention belongs to the field of noise control, and discloses a low-frequency broadband ventilation duct muffler based on a rough necked Helmholtz resonator. The low-frequency broadband ventilation duct muffler includes a cylindrical shell (1), a ventilation hole (2) and a sound absorption unit (3). A ventilation hole (2) is arranged at the center of the cylindrical shell (1), and the sound absorption unit (3) is uniformly arranged between the ventilation hole (2) and the cylindrical shell (1), and the sound absorption unit (3) is annular; the sound absorption unit (3) includes a rough neck (3-1) and a cavity (3-2), the bottom end of the rough neck (3-1) is connected to the top end of the cavity (3-2), and the cavity (3-2) is arranged at the lower end of the whole low-frequency broadband ventilation duct muffler. The present invention is used to solve the problems that the existing ventilation duct muffler has a relatively high sound absorption peak frequency, a single sound absorption peak, and a relatively low sound absorption coefficient in the low-frequency range.

The utility model belongs to the technical field of electrical equipment, and particularly relates to clothes treatment equipment. The clothes treating equipment comprises a first cylinder and a second cylinder which are arranged in parallel; a drying member; the ventilation pipeline comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part of the ventilation pipeline is connected with the first barrel, the second connecting part of the ventilation pipeline is connected with the second barrel, and the third connecting part of the ventilation pipeline is connected with the drying component; an air inlet, a first air outlet and a second air outlet which are communicated with one another are formed in a third connecting part of the ventilation pipeline, and the valve plate is rotatably arranged in the third connecting part of the ventilation pipeline and used for adjusting the air flow flux of the first air outlet and the second air outlet.

The utility model discloses a closed gas hood for papermaking ventilation, and relates to the technical field of papermaking, the closed gas hood comprises a supporting bottom plate, the bottom surface of the supporting bottom plate is uniformly and fixedly connected with bottom cushion blocks through threads, the top surface of the supporting bottom plate is buckled with a sealing hood body, and the top surface of the sealing hood body is uniformly and fixedly provided with adjusting cylinders; a control panel is fixedly clamped to the side edge of the supporting bottom plate, side through grooves are symmetrically formed in the two side edges of the sealing cover body, a ventilation pipeline is horizontally inserted into one side edge of the supporting bottom plate and one side edge of the sealing cover body, an air channel groove is horizontally formed in the top face of the supporting bottom plate, and a supporting net plate is horizontally clamped to the top face of the inner side of the supporting bottom plate. A sealing top groove is formed in the top face of the supporting bottom plate, a control main board is fixedly connected to the inner side wall of the control panel in a clamped mode, an electric overall overturning opening structure is adopted so that feeding and discharging can be more convenient, and meanwhile various requirements for ventilation use can be met through an adjustable interval structure.

This application relates to a method, device, and computer for determining vehicle seat ventilation parameters. The method includes: obtaining three-dimensional contour information of a target object on a vehicle seat, physiological information of the object, and information about the vehicle's interior environment; performing a comfort analysis based on the physiological information of the object and the interior environment to determine the comfort physiological information; constructing ventilation duct information for the vehicle seat based on the three-dimensional contour information, using the comfort physiological information as a target condition; inputting the comfort physiological information and ventilation duct information into a fan control model to obtain initial fan operating parameters corresponding to each fan; performing a ventilation simulation based on the initial fan operating parameters to obtain fan operating information corresponding to each fan; for any fan, performing energy-saving optimization on the initial fan operating parameters based on the fan operating information to obtain target fan operating parameters; and fusing the target fan operating parameters to obtain seat ventilation parameters for the vehicle seat. This method can improve seat ventilation performance.

The present invention discloses an intelligent linkage low-temperature grain storage multi-functional ventilation system and its ventilation method, which includes a ventilation pipe network, a main controller, and several refrigeration and air-conditioning units, temperature sensors, etc. connected to the main controller. The ventilation pipe network includes an upper-layer annular ventilation duct, a bottom-of-bunker ventilation floor grille, a vertical ventilation duct along the corner of the bunker wall, etc. Among them, the upper-layer annular ventilation duct is installed parallel to the ground below the grain loading line on the side wall of the granary; the bottom-of-bunker ventilation floor grille includes a lower-layer annular ventilation floor grille and a semi-circular cross-section ventilation floor grille arranged in a "mountain" shape; the vertical ventilation duct along the corner of the bunker wall has an isosceles triangle cross-section, one group of which is connected to the upper-layer annular air duct, and the other group is connected to the lower-layer annular floor grille. A closed air valve is provided on each branch air duct, and the opening and closing are controlled by the main controller according to the requirements of different grain storage temperature control working conditions; the present invention can systematically solve the problem of grain storage loss caused by reasons such as "local heating", "blind ventilation", and "cold core and hot skin" during storage.

The utility model discloses a ventilating duct device of a building body, which belongs to the technical field of ventilating ducts and comprises a duct, a first connecting frame is fixedly mounted on the outer wall of one end of the duct, a second connecting frame is fixedly mounted at the other end of the duct, and a quick mounting component is arranged on the inner wall of the second connecting frame. A pulling and dismounting assembly is arranged on the quick-mounting assembly, the quick-mounting assembly comprises a baffle, a long rod is fixedly mounted on the outer wall of the baffle, and the long rod penetrates through a through hole formed in the outer wall of the second connecting frame; according to the rapid connection device, the rapid installation assembly is arranged, through the design, rapid connection of the ventilation pipeline is effectively achieved, the installation difficulty of the ventilation pipeline is greatly reduced, the operation process is simplified, rapid connection can be conducted by non-professionals, the work efficiency of laying the ventilation pipeline by workers is greatly improved, and the use effect is good.

The utility model discloses a construction ventilation system for a self-flowing drainage tunnel of a pumped storage power station, which structurally mainly comprises an outer tunnel, a fan, a ventilation pipeline and a dust removal piece, and is characterized in that fresh air is conveyed into the tunnel through the fan arranged at a tunnel opening and the ventilation pipeline connected to the fan; and then most of the vitiated air in the tunnel is absorbed and filtered through the dust removal piece, so that the vitiated air in the tunnel and discharged out of the tunnel is reduced, and the pollution of the vitiated air to the environment in the tunnel and outside the tunnel is reduced.

The invention relates to an indoor heat pump (1) configured to be installed inside a building, the heat pump (1) comprising: - a housing (2) which houses a heat pump circuit (4), - a flammable refrigerant contained in the heat pump circuit (4), - a ventilation pipe (8) and a fan (10) connected to the ventilation pipe (8) in a fluid-conducting manner, - a gas detector (12) located in the housing (2), and - an electrical control unit (14) referred to as a safety card (14'), wherein the ventilation pipe (8) is arranged to convey air from the interior of the housing (2) to the outside of the building (2) upon activation of the fan (10), wherein the safety card (14') is configured to receive a leak detection signal (LS) from the gas detector (12) and to activate the fan (10) in response to receipt of the leak detection signal (LS). The indoor heat pump (1) further comprises a differential pressure sensor (16) configured to detect a pressure difference (DF) between the inside and the outside of the housing (2), wherein the safety card (14') is configured to trigger recurring functional tests (FT) by activating the fan (10) and evaluating a developing pressure difference (DF) measured by the differential pressure sensor (16), wherein the functional test (FT) is passed if the developing pressure difference (DF), in particular depicted as a negative differential pressure, exceeds a predetermined pressure threshold.

The UHPC assembly type machine room structure comprises a machine room enclosure bulkhead cylinder body, a first end cover and a second end cover, wherein the machine room enclosure bulkhead cylinder body is prefabricated by adopting an ultra-high performance concrete UHPC material; the machine room enclosure bulkhead cylinder body is provided with a bottom plate and two side walls, and the machine room enclosure bulkhead cylinder body is provided with a first opening end and a second opening end which are oppositely arranged; the first end cover and the second end cover are respectively arranged at the first opening end and the second opening end; the two end covers are provided with smoke suction and exhaust ports used for being connected with a ventilation pipeline. A machine room access door is arranged on one side wall; an internal smoke exhaust pipeline is arranged in the machine room enclosure bulkhead cylinder body, the two ends of the internal smoke exhaust pipeline are connected with the smoke suction and exhaust ports in the first end cover and the second end cover respectively, and the fan is arranged on the internal smoke exhaust pipeline. The UHPC shell is adopted and serves as an outer enclosure material of the machine room structure at the same time, the functions of enclosure, decoration, structural bearing and partial fire prevention are achieved, and building structure decoration and function integration is achieved.

The invention relates to a UHPC-based fabricated fire-fighting smoke exhaust fan room structure and a construction method thereof, the room structure comprises a main body structure, and the main body structure is prefabricated by adopting an ultra-high performance concrete UHPC material; a fan is arranged in the internal space of the main body structure; the main body structure is provided with a machine room enclosure bulkhead cylinder body and an end cover side wall. Wherein the machine room enclosure bulkhead cylinder body 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 a first opening end and a second opening end which are oppositely arranged are arranged at the two ends of the machine room enclosure bulkhead cylinder body in the horizontal direction respectively; 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; the first end cover and the second end cover are each provided with a smoke suction and exhaust port, and the smoke suction and exhaust ports are used for being connected with a ventilation pipeline. The UHPC shell is adopted, the advantages of being high in strength and good in fire resistance are achieved, the prefabricated assembly type structure is adopted, construction is convenient, and efficiency is high.

The utility model discloses a building waste treatment device, including crushing box body, recovery box, dust recovery mechanism, feeding mechanism, feed inlet and stone crushing mechanism, the bottom end of crushing box body is provided with the recovery box, the side face of crushing box body is provided with dust recovery mechanism, the side face of crushing box body is provided with feed inlet, and the feed inlet is provided with the stone crushing mechanism. A feeding mechanism is arranged in the middle of the feeding port, a stone crushing mechanism is arranged in the middle of the crushing box body, and an air inlet is formed in the side face of the crushing box body. According to the building waste treatment device provided by the utility model, the dust recycling mechanism is arranged, and after dust is generated during crushing in the crushing box body, a first servo motor drives a flow guide scattered blade to rotate through a transmission shaft, so that the dust can be collected into a ventilation pipeline and attached to the surface of a dustproof net; and dust can be collected into the dust collection box through sweeping of the brush head, and then dust pollution caused by waste crushing can be avoided.

An air cooler with a blowback dust removal structure belongs to the technical field of air coolers, comprises a ventilation pipeline and a dust collection cloth bag, and is characterized in that a dust cover and a connecting plate with holes are fixedly mounted at the left end and the right end of the ventilation pipeline, and a positive and negative rotation motor A with fan blades and a heat exchanger main body are fixedly mounted in the ventilation pipeline; the heat exchanger body is located on the right side of the forward and reverse rotation motor A. A through opening is formed in the upper surface of the ventilation pipeline in a penetrating mode, a rotating rod is rotationally installed in the ventilation pipeline, a sealing baffle is installed on the outer surface of the rotating rod in a sleeved mode, and the dust collection cloth bag is detachably installed at the left end of the ventilation pipeline. And the air enters the ventilation pipeline through the through hole and is discharged from the left end after passing through the dust cover, so that back-blowing dust removal is realized, the process is simple, convenient and rapid, the dust cover does not need to be disassembled, and the dust removal efficiency can be effectively improved.

The utility model belongs to the technical field of electrical equipment, and particularly relates to clothes treatment equipment. A ventilation pipeline of the clothes treatment equipment comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part of the ventilation pipeline is connected with a first barrel, the second connecting part of the ventilation pipeline is connected with a second barrel, the third connecting part of the ventilation pipeline is connected with a drying module, and the first ventilation part of the third connecting part is provided with a communicated first air inlet. A first air outlet and a second air outlet; the first valve rotates in the first ventilation part so as to adjust the air flow flux of the first air outlet or the second air outlet; the first detection assembly comprises a first triggering piece and a first position confirming piece, the first triggering piece is connected with the first valve, the first position confirming piece is connected with the first ventilation part, and when the first valve rotates in the first ventilation part, the first triggering piece triggers the first position confirming piece to confirm that the first valve rotates in place.

The utility model discloses a storage device for improving the stability of carbon black, which comprises a stock bin, a stirring mechanism and a ventilation mechanism are arranged in the stock bin, the stirring mechanism comprises a stirring shaft arranged in the stock bin and stirring blades arranged on the stirring shaft, the stirring blades are arranged in a multi-layer and multi-angle mode, the stock bin is communicated with a nitrogen storage tank, and the nitrogen storage tank is communicated with the ventilation mechanism. A first electric valve is arranged on a connecting pipeline of the stock bin and the nitrogen storage tank, an oxygen concentration sensor and a humidity sensor are arranged in the stock bin, and the oxygen concentration sensor is interlocked with the first electric valve; the ventilation mechanism comprises an annular ventilation pipeline arranged on the lower portion of the stock bin, a plurality of ventilation holes facing the stirring shaft are formed in the annular ventilation pipeline, and the annular ventilation pipeline communicates with an air blower. The humidity sensor is interlocked with the blower; an air outlet is formed in the top of the stock bin and sequentially communicated with the cyclone separator, the bag-type dust collector and the induced draft fan. The device can effectively prevent the carbon black from absorbing moisture, oxidizing and caking, so that the storage stability of the carbon black is improved, and the dust raising phenomenon can be effectively avoided.

The invention discloses a dust removal part, a dust removal system and a battery production line, and the dust removal system comprises a dust remover and the dust removal part; the shell is arranged on the bottom face of the logistics line, a first ventilation channel is formed in the shell, and an air outlet of the first ventilation channel faces the logistics line; the dust remover is arranged on the bottom surface of the logistics line and is configured to remove sundries at the gap of the logistics line; the dust removal part is arranged on the bottom face of the logistics line and is configured to adsorb sundries on the logistics line through static electricity. According to the scheme, due to the fact that the air outlet of the first ventilation channel faces the logistics line, dust, adsorbed by static electricity, on the surfaces of materials on the logistics line can be blown off by blowing ionic wind to the first ventilation channel, then sundries at the gaps of the logistics line are removed through the dust remover, and the sundries at the gaps of the logistics line are prevented from falling on the surfaces of the materials; and finally, fine dust particles remaining on the surfaces of the materials are adsorbed through the electrostatic adsorption function of the dust removal part, so that dust on the materials can be effectively treated, and the overall dust removal effect is good.

The invention provides a ventilation system for tunnel construction, relates to a tunnel ventilation technology, and particularly discloses a mounting main frame matched with a tunnel excavation section, a construction cavity is formed in the mounting main frame, and sealing structures used for sealing the construction cavity are arranged on the two sides of the mounting main frame; a driving mechanism is arranged on the mounting main frame and used for enabling the mounting main frame to move in the tunnel excavation direction; a plurality of ventilation pipes are mounted on the side, opposite to the tunnel excavation section, of the mounting main frame, a ventilation main pipe communicated with the ventilation pipes is mounted on the mounting main frame, and the ventilation main pipe is communicated with external air supply equipment; an air outlet communicated with the construction cavity is formed in the side wall, opposite to the tunnel excavation section, of the mounting main frame, a first pipeline is mounted on the mounting main frame, an air exhaust pipeline communicated with the air outlet is mounted in the construction cavity, and the output end of the first pipeline is opposite to the air outlet; a dust removal mechanism is arranged in the exhaust pipeline; and the air replacement efficiency in the area from the to-be-excavated face of the tunnel to the mounting main frame is improved.

The utility model discloses an assembly type low-specific-friction low-air-leakage ventilation pipeline, and relates to the technical field of ventilation air pipes. The utility model comprises pipe joints which are spliced end to end; the pipe joint comprises an outer shell and an inner shell which are coaxially arranged in a sleeved mode, and the inner wall of the outer shell is attached to the outer wall of the inner shell. A first annular groove surrounding the axis of the outer shell is formed in the middle section of the inner wall of the outer shell, second annular grooves surrounding the axis of the outer shell are formed in the two ends of the inner wall of the outer shell, and one side of each second annular groove penetrates through the end of the outer shell. A cooling filling cavity is formed between the outer wall of the inner shell and the first annular groove in a surrounding mode, the outer wall of the inner shell and the two second annular grooves form a first sealing filling cavity and a second sealing filling cavity respectively, and the first sealing filling cavity and the second sealing filling cavity of the other pipe joint are spliced to form a sealing cavity. The purposes that the air pipe can be conveniently assembled, the sealing performance is excellent, and meanwhile the air pipe has low specific friction resistance and good flame retardant performance are achieved.

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 invention discloses a noise reduction device for concrete conveying equipment and a using method, and belongs to the technical field of deep foundation pit building construction.The noise reduction device comprises a supporting mechanism, the supporting mechanism is of a rectangular frame structure and is arranged on the ground, and a noise reduction mechanism is arranged outside the supporting mechanism and comprises a top flexible rubber soundproof cover; the foldable sound-proof covers are arranged on the two sides in the length direction, and the front-end sound-proof door curtain and the tail-end sound-proof cover are arranged on the two sides in the width direction respectively; a dust falling and cooling mechanism is arranged on the tail end sound insulation cover and comprises a pressure water pump, a ventilation pipeline and a spray head, the pressure water pump is connected with the spray head through a water conveying pipe, and the ventilation pipeline is arranged on the tail end sound insulation cover above the pressure water pump in a penetrating mode in the length direction. The device can achieve multiple functions of noise reduction, dust falling and cooling, can be moved and contracted and is suitable for sky pump equipment and ground pump equipment at the same time, the practicability of the device is improved, the construction operation efficiency is improved, and the workload of operators is reduced.

The utility model provides a ventilating duct wind pressure measuring device, and relates to the technical field of wind pressure measurement, the ventilating duct wind pressure measuring device comprises a housing and an installation assembly, one side of the housing is provided with a cable, one side of the housing is provided with a display screen, one side of the housing is provided with a measuring rod, one side of the housing is provided with a take-up device through the installation assembly, and the other side of the housing is provided with a wind pressure sensor. The take-up device comprises a placing plate, one side of the placing plate is in threaded connection with a threaded rod, one side of the threaded rod is rotatably connected with a fixing plate, one side of the placing plate is fixedly connected with a take-up rod, one side of the threaded rod is fixedly connected with an operation block, and one side of the operation block is fixedly connected with a plurality of anti-skid blocks. According to the wind pressure measuring device, by using the take-up device, the cable can be stored and fixed, and the situation that the cable is easily entangled together when wind pressure measurement is finished and the wind pressure sensor is stored is avoided, so that the use effect of the wind pressure measuring device can be improved.