364 results about "Smoke exhaust ductwork" patented technology

The invention relates to an intelligent detection and electronic control smoke discharge cooking pot set. An existing cooking pot structure and a corresponding heater structure are improved, a bran-new design concept is adopted, an intelligent detection and automatic electronic control structure is introduced, a pot bottom additional layer (3) is designed at the bottom of a cooking pot body (1), a first sleeve (4) and a second sleeve (5) which penetrate through the interior of the cooking pot body (1) and the pot bottom additional layer (3) are designed based on the structure, and then a third sleeve (6) designed on a corresponding heater and a smoke discharge pipe form a smoke discharge pipeline. Meanwhile, an electronic control telescopic rod (10) is designed and installed in the second sleeve (5), a cover plate (7) located at the telescopic rod moving end of the electronic control telescopic rod (10) is designed in a matched mode, intelligent detection and intelligent control are conducted in combination with a smoke sensor (12), opening and closing of the smoke discharge pipeline are achieved, discharge of smoke generated in the cooking process of the cooking pot is achieved accordingly, and influences of smoke on the surroundings can be effectively avoided.

The invention discloses a fluidic generator applied on a smoke exhaust ventilator, comprising an outer shell and an inner shell arranged in the outer shell, wherein the inner shell and the outer shell are both in broadening formation, and the outer shell is provided with an air intake; the top edges of the inner shell and the outer shell are mutually connected into a whole; the bottom edge of the inner shell is provided with a first edgefold part towards the outer shell; and the lower edge of the outer shell is provided with a second edgefold part towards the inner shell, and a jet flow path is formed in a gap formed between the second edgefold part and the first edgefold part. The invention also discloses a jet flow type smoke exhaust ventilator adopting the fluidic generator. The invention is characterized in that the fluidic generator generates jet flow air flow, the air flow is mixed with soot gas to be discharged from a fume exhaust pipeline; vane wheels and the motor are completely separated from soot gas so as to solve the problem that vanes and fans are polluted by the soot gas, and realizing the purpose that the vanes and the fan are free from disassembling and washing for lives.

The invention relates to an LNG heating and gasifying device applicable to medium-scale and small-scale areas, in particular to a fume impact water-spinning LNG heating and gasifying device, wherein the top of a cylindrical shell (12) is provided with a combustion chamber which comprises an inner barrel (16) and an outer barrel (3), the top of the inner barrel (16) is provided with a combustor (1), the lower end of the outer barrel (3) is provided with a conical spout (11), a heat exchange surface arrangement space (4) is formed between the outer barrel (3) and the shell (12), a fume exhaust pipeline (14) is arranged at the upper part, a jacket layer (2) is formed between the outer barrel (3) of the combustion chamber and the inner barrel (16), the bottom of the jacket layer (2) is communicated with the conical sprout (11) and the top thereof is communicated with the fume exhaust pipeline (14) by a circulating flue (17), the lower part of the shell (12) is provided with a water pool (10) for storing water, an inverted umbrella-shaped pneumatic water spinner (7) is soaked in the water surface part of the water pool (10), and pile coils (5) which are arranged round the outer barrel (3) of the combustion chamber in a spiral ascending manner are arranged in the heat exchange surface arrangement space (4). The invention has simple and compact structure, wide work load range, convenient operation and maintenance, high heat efficiency and quick speed for gas supply, and is suitable for heating and gasifying LNG by medium-scale and small-scale gasification stations.

Provided is an automatic smoke exhaust device for a large-space building catching a fire. A top ceiling of the large-space building is provided with a plurality of vertical-type smoke exhaust pipelines, smoke exhaust fans are coaxially installed in the smoke exhaust pipelines, openings of the smoke exhaust pipelines are covered with protection covers, flexible drapery cylinders are arranged in the circumference direction of the lower portions of the smoke exhaust pipelines, the upper ends of the flexible drapery cylinders are fixedly installed on the ceiling, each drapery cylinder is symmetrically provided with a plurality of pull ropes ,the lower ends of the pull ropes are fixed to the lower ends of the drapery cylinders, the upper ends of the pull ropes are tightly wound on idler wheels driven by a motor, a fire detector arranged in the large-space building is connected with a fire alarm main unit in a fire protection control center through an alarm signal line, the fire alarm main unit transmits signals to a control unit of the automatic smoke exhaust device, and the control unit is connected with an emergent power supply through a control line and is provided with an audible and visual alarm. When the fire breaks out, the device can descend the drapery cylinders to a smoke accumulation floor to exhaust smoke, the smoke exhaust effect is greatly improved, smoke diffusion speed is effectively reduced and control of smoke in the early and middle stages of the fire is facilitated.

The present invention belongs to the technical field of the fire safety, in particular to a simulating experiment device for inflammation in a disaster. The device consists of a smoke exhaust pipeline, flaming cells, a fuel feeding system and a control system, wherein, the smoke exhaust pipeline comprises a rectangular column shaped casing, which is closely integrated to a base seat to form a rectangular column shaped inner space; the middle of the top has the smoke exhaust pipeline; a lateral wall of the inner space is provided with an air inlet which can be opened or closed; with being respectively arranged on four slider blocks, the flaming cells contact closely by twos when the slider blocks move inwards; the fuel feeding system consists of a fuel container arranged out of the casing and a hosepipe connected with the casing; the control system consists of a single-chip microcomputer and the operation system thereof controlling the feeding of the fuel, the moving of the flaming cells and the switching of an ignition device. In the experiment device, the four flaming cells of the same size are arranged on a plane and can be controlled to move flexibly to form a large flaming cell, therefore, the conditions and the rules for forming fire whirlwinds by flames in a plurality of small flaming cells can be studied, and the fire whirlwind experiment of a single large flaming cell can also be performed.

The invention belongs to the technical field of heating furnace combustion. A heat accumulating type heating furnace totally using blast furnace gas as a fuel comprises a heating furnace body, a blast furnace gas heat accumulating chamber, an air heat accumulating chamber, a blast furnace gas ignition burner, a blast furnace gas pipeline system, a combustion air pipeline system, an air side exhaust pipeline system and a gas side exhaust pipeline system; a hearting furnace hearth is arranged in the heating furnace body; the blast furnace gas heat accumulating chamber and the air heat accumulating chamber are formed on two side walls of the heating furnace body; and the blast furnace gas ignition burner is arranged on the end wall or the side wall of the soaking zone of the heating furnace body. The heating furnace is characterized in that: a resistance wire heating ignition device is arranged in the hearting furnace hearth and positioned in front of a nozzle of the blast furnace gas ignition burner planed to be first opened during ignition or in front of a nozzle of the blast furnace gas heat accumulating chamber, and the resistance wire heating ignition device is positioned in thehearting furnace hearth. The ignition operating process is simple, convenient and reliable to implement when the drying furnace or the cold furnace is ignited.

The invention provides a fire disaster test device and method used for multi-line transfer stations of a subway. The device comprises a multi-line transfer subway station model, a smoke exhaust prevention system and a fire disaster test system, wherein the multi-line transfer subway station model comprises a station A, a station B, a station C and a station D and is used for realizing multi-line transfer by adjusting stairs between stations and opening or closing of transfer channels; the smoke exhaust prevention system comprises a smoke exhaust pipeline arranged in each space of the multi-line transfer subway station model as well as a smoke exhaust fan connected with the smoke exhaust pipeline; the fire disaster test system is used for detecting smoke parameters under the condition of a fire disaster and performing monitoring processing. According to the rule that smoke diffuses through multiple transfer channels and stairs to multiple stations and the smoke exhaust ventilation network air distribution and smoke control scheme of multiple smoke prevention areas, diffusion of fire disaster can be effectively controlled, death of people is reduced, and financial loss is reduced.

The invention discloses a device for dual-stage extinguishment and washing of a kitchen flue. The device comprises a smoke extracting pipe connected with a smoke extracting cover, a smoke extracting machine connected with the smoke extracting cover and a smoke exhausting pipe connected with the smoke extracting machine; the smoke extracting cover is arranged below an indoor roof and beside a wall, and a cooking bench is arranged below the smoke extracting cover; the position below the smoke extracting cover is divided into a cover plate zone and an air extracting zone, and the cover plate zone is provided with a control drive used for sealing the air extracting zone; a temperature inductor is arranged in the smoke extracting pipe, the temperature inductor and the control drive are connected into a controller, and the smoke extracting machine is also connected into the controller; and meanwhile, a spraying extinguishment cooling device is arranged in the smoke exhausting pipe. The device can achieve automatic detection control, fire hazards in the kitchen flue are extinguished, air is isolated through the smoke extracting cover, and meanwhile dual-stage extinguishment including spraying extinguishment and cooling is achieved through smoke exhausting pipe; the device is safe, timely and effective, and the life and property safety of people is sufficiently guaranteed; and meanwhile, oil contamination in the smoke exhausting pipe is automatically removed conveniently and rapidly, and washing liquid can be used in a circulated manner.

The invention relates to a test device for combustion characteristics of a coal sample under thermal radiation of jet flames in different strengths. The device can be used for researching the coal sample ignition with non-contact flames. The test device comprises a box, a flame heating component, a coal sample placing component and a detecting component; an experimental platform, a gas-guide portand a fume exhausting pipeline are arranged on the box; the flame heating component comprises a fuel tank and a Bunsen burner; the Bunsen burner is connected with the fuel tank through a conduit; thecoal sample placing component comprises an expansion link, a support rod, a rail and a sample vessel; a rail is arranged on the experimental platform; the expansion link is arranged on the experimental platform; the support rod is arranged on the expansion link; the sample vessel is placed on the tail end of the support rod; the detecting component is arranged in the box and comprises a mass sensor, a photoelectric thermocouple, a radiation heat-flow meter, a gas sensor and a camera; the mass sensor is arranged on the tail end of the support rod; the photoelectric thermocouple, the radiation heat-flow meter and the gas sensor are all arranged on the support rod; a camera is arranged above the box.

The invention discloses a smoke prevention and exhaust pipeline cleaning robot comprising a moving trolley and a control system. A travelling control mechanism is arranged on the lower portion of the moving trolley, and a support, a camera and a bulb are arranged on the upper portion of the moving trolley. A cleaning arm lifting mechanism is mounted on the support and comprises a lifting motor, a lead screw, a thread pipe, a supporting arm and a cleaning arm. A sweeping system is arranged at the top end of the cleaning arm and comprises a cleaning agent spraying device, two direct-current motors and two sweeping brushes. The travelling control mechanism of the moving trolley in the smoke prevention and exhaust pipeline cleaning robot adopts four direct-current speed reducing motors to drive four rollers through four half shafts correspondingly. The forward inclination angle of the cleaning arm can be adjusted, accordingly the sweeping height can be changed so as to adapt to pipelines with different sections. The cleaning agent spraying device is arranged on a sweeping arm so that cleaning agents can be sprayed on the inner wall of the pipeline uniformly, and accordingly the oil stain sweeping efficiency of the sweeping brushes is improved greatly.

The invention relates to an air intake noise reduction structure for a gas water heater. The air intake noise reduction structure is characterized by comprising an outer pipe and an inner pipe which are connected in a sleeving manner. A gap between the outer pipe and the inner pipe forms an air intake channel. An inner end opening of the inner pipe is connected with an exhaust opening of an air collection cover of the water heater. An outer end opening of the inner pipe is connected with an exhaust pipeline. A first end opening of the outer pipe is connected with an air inlet of the water heater. A second end opening of the outer pipe communicates with the ambient atmosphere, a filtering screen is arranged on the second end opening, and a noise absorbing layer is arranged on the inner wall of the outer pipe. According to the air intake noise reduction structure for the gas water heater, a box body of the water heater is of a closed structure, most of noise is controlled to be conveyed out through the air intake channel, the noise passes a denoising structure such as noise reduction cotton, the filtering screen and the like in the propagation process, the noise of a fan is lowered substantially, and the noise reduction effect is remarkable; and in addition, cold air is preheated through the temperature of wasted smoke, the combustion efficiency and thermal efficiency of gas are improved, and the energy saving effect and consumption reduction effect are good.

The invention provides a welding smoke exhaust room comprising a house. A welding workbench is arranged in the middle of the house, an exhaust pipe is arranged above the welding workbench, arc baffles are arranged at the lower end of the exhaust pipe, and an exhaust fan is arranged at the top end of the exhaust pipe. Smoke generated on welding site can be exhausted out of the house rapidly by the exhaust pipe arranged above the welding workbench, so that working staff in the workshop is protected and work efficiency is improved.

The invention discloses a non-ventilation-pipeline inducing type ventilation and smoke exhaust system and a ventilation and smoke exhaust method thereof. The system comprises an independent smoke exhaust system body and a non-underground-ventilation-pipeline inducing type ventilation system body. The independent smoke exhaust system body comprises a smoke exhaust fan, smoke exhaust ports, a smoke exhaust pipeline and a smoke exhaust fire damper. The smoke exhaust ports are formed in a ceiling or a wall face close to the ceiling. The smoke exhaust fire damper is installed at an inlet of the smoke exhaust pipeline. The non-underground-ventilation-pipeline inducing type ventilation system body comprises an inducing fan set, an air feeder, an exhaust blower, an exhaust pipeline, an exhaust port and an electric air valve. The inducing fan set is arranged on the lower portion of a floor slab. The electric air valve is installed on the exhaust pipeline. The ventilation and smoke exhaust method comprises the steps that during ventilation, the smoke exhaust fire damper is closed, the electric air valve is opened, and the exhaust port is opened for ventilation; and during a fire, the electric air valve is closed, the smoke exhaust fire damper is opened, and the smoke exhaust ports are opened for smoke exhaustion. The ventilation effect and the smoke exhaust effect are good, the noise pollution is reduced, the energy consumption is low, and the investment cost is low.

The invention relates to a ventilating duct or flue drainage and fireproof non-return device which comprises a base, wherein the base is arranged at an outlet of a smoke removal pipeline in a sleeving manner, and a hollow channel is formed in the middle of the base; a baffle plate used for closing the hollow channel is arranged on the base, and the bottom of the baffle plate is movably chained through the base; a control device is arranged at the lower part of the base and comprises a first torsion spring, and the first torsion spring is fixedly arranged in the connecting position of the baffle plate and the base; a temperature control device is also arranged on the base and comprises a second torsion spring and a metal temperature sensing piece; one end of the metal temperature sensing piece is fixedly arranged on the base, and the other end of the metal temperature sensing piece is of a movable end and is butted against the baffle plate; a convex part is arranged at the movable end of the metal temperature sensing piece. The ventilating duct or flue drainage and fireproof non-return device can automatically close the smoke removal pipeline according to the temperature variation in the smoke removal pipeline.

The invention relates to a cast-in-place hollow floor with a hidden protecting fume exhaust ductwork, in particular to a system for indoor ventilation by utilizing a building hollow floor. The proposal adopts a cast-in-place hollow floor built by hollow thin wall cases and utilizes a communicated pipeline to communicate each hollow thin wall case in the floor so as to form a hidden protecting fume exhaust channel; the lower part of a indoor thin wall case of the building is provided with an air outlet which is communicated with the hidden protecting fume exhaust channel; by utilizing an exhaust opening of the hidden protecting fume exhaust channel, the indoor fume and gas can be exhausted outside, and the outdoor fresh air also can be introduced into the room; and by additionally utilizing a smoke extractor, the exhausting effect can be increased or strengthened. The proposal solves the problem that an air conduit is installed additionally in the room, reduces the cost, enlarges the using space of the room, and increases a solution when a fire occurs.

The invention relates to a down-draught type range hood, which comprises a cabinet, a fan system arranged in the cabinet, a fume collection chamber vertically arranged on the tabletop of the cabinet and a filter unit obliquely arranged in the fume collection chamber, wherein the filter unit comprises at least two layers of filter plates which are provided with a plurality of air vents; the air vents on two adjacent layers of filter plates are distributed in a misaligned manner; a turnup is formed around each air vent; the fan system comprises a fan, a fume exhaust pipe and static fume adsorption equipment; the fume collection chamber is communicated with the inlet of the fan; the inlet of the fume exhaust pipe is connected with the outlet of the fan; and the outlet of the fume exhaust pipe is connected with the inlet of the static fume absorption equipment. Compared with the prior art, the range hood has better fume filtration effect and less air flow loss, can further purify exhausted fume and ensure the air exhausted into the outside meet the requirements of fume exhaust standards of food industry.

The invention provides an extractor hood preventing water remaining. A shell, a smoke discharging pipeline, a draught fan, an air blowing pipeline and a controller are included. When cooking is performed, the controller controls the draught fan to rotate forwards, so that air circulation to the outdoor environment is generated in the smoke discharging pipeline, and lampblack generated by cookwareis absorbed. After the cookware is cleaned, the controller firstly controls an electric louver to be closed, and a smoke absorbing opening is blocked. Then the draught fan is controlled to rotate reversely, so that air circulation to the indoor environment is generated in the smoke discharging pipeline, and air passes through the air blowing pipeline, air flow is blown and fed to the cookware froman air blowing opening, and evaporation of remaining water in the cookware is accelerated. According to the extractor hood preventing water remaining, due to the fact that the air blowing pipeline communicating with the smoke discharging pipeline is additionally arranged, and reverse rotating of the draught fan is utilized, the extractor hood can blow and feed airflow to the cookware, the remaining water on the cookware is fast evaporated, the cookware is kept dry, and therefore it is avoided that due to the remaining water, the cookware is rusted, and the problem that after cleaning of traditional cookware, the water remains, and the cookware is likely to be rusted is solved.

The invention provides a kitchen air conditioner and a control method thereof. The kitchen air conditioner comprises an air conditioning assembly and a range hood assembly, wherein the air conditioning assembly comprises a compressor, a condenser, a throttling element and an evaporator, the compressor, the condenser, the throttling element and the evaporator are connected to form a refrigerant refrigeration cycle, the range hood assembly comprises a smoke exhaust pipeline and a smoke exhaust fan located in the smoke exhaust pipeline, and the condenser is arranged around the peripheral wall of the smoke exhaust pipeline. According to the kitchen air conditioner and the method, the condenser is arranged around the peripheral wall of the smoke exhaust pipeline, so that the problems that in the prior art, due to the fact that the condenser is arranged in the smoke exhaust pipeline, heat exchange efficiency is reduced due to oil smoke accumulation and cleaning is difficult after filth blockage can be effectively solved, and meanwhile, the wall body of the smoke exhaust pipeline can be heated by utilizing heat of the condenser, so that the situation that oil smoke in the smoke exhaust pipeline from is liquefied and attached to the wall body of the smoke exhaust pipeline due to cold is prevented.

The invention relates to the technical field of fire extinguishing, and discloses a fire extinguishing spraying device capable of achieving automatic smoke discharge. The fire extinguishing spraying device comprises a filter box, and a rotating cylinder is inserted into the filter box; six openings arranged equidistantly are formed in the exterior of the rotating cylinder, and six rotating platesare arranged at the exterior of the rotating cylinder; the top of the filter box is fixedly connected with a smoke exhaust pipeline, and the right side of the filter box is fixedly connected with a collecting box; the inner right wall of the collecting box is fixedly connected with a fixing cylinder, and the back side of the filter box is fixedly connected with a water inlet pipe; and the front side of the filter box is fixedly connected with a water outlet pipe. Through arrangement of an arc-shaped filter disc, ash and solid particles generated by smoke dissolved in water can be intercepted,and the rotating plate is in contact with the arc-shaped filter disc during rotation, so that the ash and the solid particles on the rotating plate are scraped off; and therefore the effect of preventing the ash and the solid particles from being accumulated on the arc-shaped filter disc is achieved; and the situation that the arc-shaped filter disc is blocked and consequently water is affected toenter the spraying device through the water outlet pipe is avoided.

The invention discloses a method and a device for controlling the pressure in a fire-resistance rating test furnace. The device comprises the fire-resistance rating test furnace, pressure sensors, PID (proportion integration differentiation) controllers, a computer, porous smoke-discharge flow stabilization nets, a smoke collecting hood, a smoke discharge fan and a smoke discharge pipeline. According to the method, when fuel in the fire-resistance rating test furnace begins to burn, the pressure sensors in the furnace and the computer are used for sending actual in-furnace pressure data and set target pressure data to the PID controllers respectively, the PID controller is used for making comparison and analysis on the data and then sending a control instruction to the smoke discharge fan so that the rotation speed of the fan is regulated, and under the action of the smoke discharge fan, the smoke passes the test furnace, flows out of smoke discharge holes arranged at the top of the test surface, then passes the porous smoke-discharge flow stabilization nets into the smoke collecting hood and is discharged by the smoke discharge fan to a smoke treatment system. The method and the device adopt the computer and the PID controllers to control the pressure in the test furnace by changing the rotation speed of the smoke discharge fan, so that the pressure distribution in the test furnace can be controlled uniformly and stably.

The invention relates to a full-automatic smoke discharging and fire extinguishing system. The system comprises an automatic smoke discharging module, a water mist automatic fire extinguishing module and a smoke range control module, wherein the automatic smoke discharging module is arranged at the top in a building; the automatic smoke discharging module comprises a main smoke discharging pipeline, a plurality of smoke suction ports and smoke discharging ports are formed in the main smoke discharging pipeline, smoke discharging fans are arranged at the smoke discharging ports in the main smoke discharging pipeline, and a fireproof cooling mechanism is arranged on the outer wall of the main smoke discharging pipeline; and the water mist automatic fire extinguishing module comprises a plurality of water conveying pipes arranged at the two sides of the main smoke discharging pipeline in the laying direction, the water conveying pipes are connected with a plurality of water mist nozzles in the laying direction of the water conveying pipes and connected with a high-pressure water supply assembly, and the outer walls of the water conveying pipes are sleeved with heat insulation sleeves. The smoke range control module comprises smoke blocking vertical walls arranged at the two ends of the main smoke discharging pipeline in the laying direction respectively, and a smoke dissipation control mechanism is arranged between the smoke blocking vertical walls and the main smoke discharging pipeline. The system has the effects of extinguishing fire in time, controlling the smoke diffusion range and discharging the smoke in time when a fire occurs.

The invention discloses a fire combustion and ventilation control system of a spiral tunnel group. The spiral tunnel group comprises a straight tunnel and a spiral tunnel. A longitudinal ventilation device is arranged at a left port of the straight tunnel and can be adjusted according to a required longitudinal wind amount, and the ventilation direction can be changed. The position of a fire source is variable, and fires in the straight tunnel, the spiral tunnel and a connection transition section can be simulated. The spiral tunnel is composed of tunnel unit sections, the length can be increased or decreased, and the spiral radius can be selected on a tunnel moving platform according to needs. The tunnel inclination angle is adjusted through a jack. Fire smoke enters a centralized smoke exhaust pipeline through a centralized smoke exhaust port of the tunnel ceiling and then is exhausted through a centralized smoke exhaust fan arranged at the port of the pipeline. Through simulation ofthe system, smoke diffusion parameters of different fire smoke of the spiral tunnel group can be acquired, and the purpose of seeking an efficient smoke control method is achieved.

The invention relates to the technical field of ventilation and smoke exhaust of rail transit, and discloses a fire ventilation and smoke exhaust system and method for a station hall of a separated-island type subway underground station. The ventilation and smoke exhaust system comprises two mutually separated station halls, each station hall comprises two adjacent smoke prevention partitions, andthe smoke prevention partitions communicate with opposite smoke prevention partitions of the other station hall through channels; each smoke prevention partition is provided with an air supply subsystem and a smoke exhaust subsystem in a one-to-one correspondence mode, and air supply pipes of the air supply subsystems are arranged in the smoke prevention partitions corresponding to the air supplysubsystems and in the channel which communicate with the smoke prevention partitions; and smoke exhaust pipes of the smoke exhaust subsystems are arranged in the smoke prevention partitions corresponding to the smoke exhaust subsystems and the channels which communicate with the smoke prevention partitions. According to the fire ventilation smoke exhaust system for the station hall of the separated-island type subway underground station, the smoke exhaust subsystems and the air supply subsystems are respectively arranged at the two ends of the two station halls, so that the length of a air supply pipeline and the length of a smoke exhaust pipeline can be effectively reduced, the wind resistance is reduced, and the air supply smoke exhaust efficiency is improved.

The invention relates to the technical field of building material or product single burning item test detection and particularly discloses a self-controlled single burning item test smoke-exhausting assisting device. The self-controlled single burning item test smoke-exhausting assisting device comprises a burning chamber, a gas collecting hood is arranged at an outlet in the top end of the burning chamber, and a collector is mounted at the top end of the gas collecting hood and connected with a fan through a smoke-exhausting pipeline. The device is characterized in that a gas collecting assisting hood is mounted above the opening of the burning chamber, the top end of the gas collecting assisting hood is connected with a smoke-exhausting assisting pipeline, the tail end of the smoke-exhausting assisting pipeline communicates with the smoke-exhausting pipeline, an electric control device is arranged in the communicating position of the smoke-exhausting assisting pipeline and the smoke-exhausting pipeline, and both the electric control device and the fan are connected with a PLC control system. The self-controlled single burning item test smoke-exhausting assisting device provided by the invention is simple in structure and flexible in application, the problem that in an existing test device, harmful smoke generated from burning of residual dripping harms the body health of the test personnel is solved, and the accuracy of detection data is improved.

The invention discloses an oil fume check valve for a range hood, relates to an oil fume check valve, and solves the problem of smoke and smell return due to poor tightness of a traditional oil fume check valve. A shell of the oil fume check valve is in a combined type, and can be conveniently mounted between the range hood and a smoke discharge port; two symmetric support beam joints are arranged on the lower section of the shell, and are connected with a turning plate and a support beam; a turning plate movement mechanism is used for performing the seamless connection for the turning plate and the support beam through a unidirection flexible hinge to form a whole incapable of being disassembled; a continuous sealing layer is arranged between a sealing surface at the edge of the turning plate and a positioning surface on the shell; one end surface of the sealing layer is bonded with the positioning surface on the shell; the other end surface of the sealing layer and the turning plate form a dynamic sealing contact surface; the dynamic sealing contact surface is made to be a coupling surface according to the surface shape of the turning plate; and the dynamic sealing is finished through precise opening / closing actions of the turning plate. The oil fume check valve is used for a smoke discharge pipe of the range hood.

The invention relates to the technical field of tunnel fire smoke exhaust, in particular to a multifunctional tunnel fire test platform with connection flues. The test platform comprises a plurality of tunnel models; the tunnel models are communicated through connection channels; a longitudinal ventilation and smoke exhaust system is arranged in each tunnel model and comprises a reducing pipe; one end of each reducing pipe is connected with a main smoke exhaust channel of the corresponding tunnel model, and the other end of each reducing pipe is communicated with an air outlet of a variable-frequency axial-flow air supply fan through a rectifying pipe. A gap between the top of each longitudinal ventilation and smoke exhaust system and the top of the corresponding tunnel model forms a smoke exhaust pipeline; a smoke exhaust air shaft with a smoke exhaust fan is arranged at the top of each smoke exhaust pipeline; an electric smoke exhaust valve is arranged between each longitudinal ventilation and smoke exhaust system and the corresponding smoke exhaust pipeline; a fire source combustion system is used for providing smoke; and a measurement and recording system is used for recording specific data. According to the test platform of the invention, simulation research can be carried out on the plurality of smoke exhaust modes of tunnel fire disasters with the communication flues, and the smoke exhaust effects of the various ventilation and smoke exhaust modes can be conveniently compared with each other.

The invention discloses a single-hole double-track tunnel two-side horizontal guide type rescue station fire model test system. The system comprises a tunnel system, a fire source simulation device, asmoke exhaust device and a monitoring device. The tunnel system comprises a main tunnel passage, parallel evacuation passages and transverse connecting passages, the two parallel evacuation passagesare arranged on the two sides of the main tunnel passage in parallel, and the transverse connecting passages are perpendicular to and communicate with the main tunnel passage and the parallel evacuation passages. The fire source simulation device is arranged in the tunnel system; the smoke exhaust device comprises a smoke prevention fan, a smoke exhaust pipeline and a smoke exhaust fan, the smokeprevention fan is arranged in the transverse connecting passages, the smoke exhaust pipeline is communicated with the main tunnel passage, and the smoke exhaust fan is arranged at the tail end of thesmoke exhaust pipeline and exhausts smoke to the outside of the tunnel; the monitoring device is arranged in the tunnel system and used for monitoring the smoke concentration and the smoke flowing rule in the main tunnel passage, the parallel evacuation passages and the transverse connecting passages. Modularized assembling is adopted, assembling is easy and convenient, and the real tunnel fire situation can be fully simulated.

The invention discloses a self-moving heat removal type smoke exhaust pipeline for a calcining furnace, and belongs to the field of smoke exhaust. The self-moving heat removal type smoke exhaust pipeline for the calcining furnace comprises a pipeline body, wherein an inner heat conduction layer is embedded in the pipeline body; a heat removal cavity is dug in the pipeline body; and through the arrangement of a heat reciprocating rod and a bidirectional heat conduction rod on the heat reciprocating rod, when smoke is exhausted, a bidirectional heat bag performs bidirectional expansion deformation at the high temperature, and when the bidirectional heat conduction rod continuously moves back and forth in the inner heat conduction layer, on one hand, the bidirectional heat bag acts on an inner moving layer, the inner moving layer continuously and circularly protrudes to achieve the dynamic process of deformation recovery, and therefore the amount of smoke particles attached to the inner moving layer is effectively reduced, compared with the prior art, the cleaning difficulty and frequency of the pipeline are obviously reduced, and on the other hand, the exchange speed of heat carriedin the smoke and condensate water in the heat removal cavity can be effectively increased, the cooling efficiency of the smoke is higher, and potential safety hazards are obviously reduced.

The invention provides an underground space fire hazard simulation experiment device, and relates to the technical field of fire fighting safety. The device comprises an experiment tunnel, a data acquisition system, a fire source and an automatic oil supplementing device, wherein the experiment tunnel comprises a rectangular tunnel, a movable baffle plate and an arc-shaped cover; an integral framework of the rectangular tunnel is an angle steel welding component; fireproof glass is arranged on the wall surface of the tunnel; the arc-shaped cover is a steel plate component; the movable baffle plate with uniformly distributed smoke discharging openings is arranged at the upper part of the rectangular tunnel; the movable baffle plate and the rectangular tunnel are fixedly connected through screw holes; the bottom of the rectangular tunnel is provided with a combustion basin; the bottom of the combustion basin is connected with the automatic oil supplementing device through a pipeline; thesmoke discharging openings are separately arranged; the four smoke discharging units form one unit and are connected with a smoke collecting cover through a smoke discharge pipeline; a centrifugal fan is arranged at an outlet of the smoke discharging pipeline; a jet flow fan is arranged at the upper part of the rectangular tunnel. The underground space fire hazard simulation experiment device ismainly used for underground space fire hazard simulation experiments.

The invention relates to an intelligent smoke exhaust duct cover. A brand-new structure device is designed aiming at the structure of the conventional smoke exhaust duct, is connected onto a smoke exhaust port of the smoke exhaust duct, and intelligently detects the wind direction and the wind speed in the smoke exhaust duct through a designed wind speed sensor (6), whether the smoke exhaust duct works is judged on the basis, then intelligent control of a designed baffle plate (3) is realized through intelligent control of a designed rotary motor (7), intelligent closing and opening of the smoke exhaust port of the smoke exhaust duct is realized, accumulation of sundries in the smoke exhaust duct is avoided effectively, and the ventilation efficiency of the smoke exhaust duct is guaranteed effectively.