145 results about "Reverse airflow" patented technology

The invention relates to the technical field of motor current limiting, and discloses a cooling fan motor starting current limiting method, device and equipment, and the method comprises the steps: carrying out the starting power calculation of a radiator, and obtaining a drive power prediction value; rotor angle position detection and blade aerodynamic resistance calculation are carried out, and aerodynamic load distribution parameters of all phase change points are obtained; performing starting current limitation to obtain a current limitation control instruction; performing motor commutation time sequence control to obtain a basic commutation control signal, and meanwhile, monitoring a starting torque abnormal increment to obtain a reverse airflow recognition result; according to the method, the current limit value is increased in the emergency mode to accelerate the starting response, the current limit is reduced in the energy-saving mode to reduce the energy consumption, and the starting current phase difference compensation is carried out to obtain a reverse airflow compensation control parameter and fuse the reverse airflow compensation control parameter with the basic phase-change control signal to obtain a target phase-change control signal. And the intelligent balance between the starting performance and the energy efficiency is realized.

The invention relates to the technical field of air conditioners, and provides a cleaning method and device for an air conditioner indoor unit. Judging whether the dust accumulation parameter reaches a preset cleaning condition or not; under the condition that the dust accumulation parameter reaches the preset cleaning condition, the indoor fan is controlled to operate reversely, so that first reverse airflow flowing from the air outlet to the air inlet is generated and used for purging the filter screen; and the air inlet is controlled to be closed, the indoor fan is controlled again to operate reversely to generate second reverse airflow, and the second reverse airflow is used for discharging the dust falling into the heat exchanger through the condensate water pipeline. Whether the filter screen meets the preset cleaning condition or not is judged by monitoring the dust accumulation parameters of the filter screen in real time, when the preset cleaning condition is met, reverse blowing is conducted on the filter screen, then the air inlet is closed, and dust deposited on the heat exchanger is discharged outdoors through the condensate water pipeline by means of the indoor fan again. Therefore, on-demand cleaning based on the actual dust accumulation condition is achieved, and the cleaning efficiency is improved.

The invention belongs to the technical field of powder metallurgy, and particularly discloses a centrifugal atomization powder making device and method based on controllable airflow regulation, and the device comprises an atomization cabin, a vacuum control system, a bar driving unit, a plasma gun, a reverse airflow generation assembly, an inert gas supply system and a powder collector. The reverse airflow generation assembly comprises a plurality of nozzles which are uniformly distributed along the circumference of the bulkhead; according to the powder preparation method, molten metal atomization is achieved through electrode bar installation, vacuumizing and inert gas filling, electrode bar plasma melting and bar rotating propelling and reverse airflow jetting. Through the synergistic effect of'centrifugal force + controllable reverse airflow ', the diameter of the atomization cabin is reduced to be less than 2 m, the proportion of special-shaped powder is reduced to be less than 3%, the liquid drop cooling rate is increased by 1.5-2 times, high purity of powder, equipment miniaturization and process greenness are considered, the problems of low cooling efficiency, poor powder quality and the like of traditional centrifugal atomization are solved, and the method is suitable for industrial production. The method is suitable for preparing active metal high-end powder such as titanium alloy.

The invention relates to the technical field of fiber fusion, and discloses a textile fiber cotton continuous forming device which comprises a forming machine, a cotton plate forming mechanism is arranged in the forming machine, and the cotton plate forming mechanism comprises a forming die, a pre-forming assembly and a glue solution blowing-floating curing assembly, and the pre-forming assembly and the glue solution blowing-floating curing assembly are matched with each other; a forming discharging port is formed in the forming die, a discharging conveying belt is arranged at the forming discharging port, the pre-forming assembly is composed of a feeding pretreatment channel and a forming continuous cylinder, and the discharging end of the feeding pretreatment channel communicates with the forming continuous cylinder and is flatly laid on the surface of the discharging conveying belt; and the glue solution blowing, floating and curing assembly comprises an air heater and glue blowing strips which are transversely and uniformly arranged along the discharging conveying belt. Through precise cooperation of the hot-air blower and the transverse glue blowing strip, double optimization of glue solution solidification and permeation is achieved, hot air jet from bottom to top forms a reverse airflow field, the falling glue solution generates a suspension permeation effect before solidification, the permeation depth of the glue solution is increased, and the bonding strength of fiber nodes is improved.

The invention discloses a compressed air energy storage multi-stage expansion machine quick starting system and method. The compressed air energy storage multi-stage expansion machine quick starting system comprises multi-stage expansion machines which are sequentially connected in series and a main air inlet pipeline connected to the first-stage expansion machine. The main air inlet module is used for supplying and adjusting air flow to the multi-stage expansion machine in a normal operation mode; the last-stage priority starting module is used for converting a high-pressure gas source into low-pressure large-flow mixed gas flow suitable for being driven by the expansion machine in the initial starting stage, and the converted mixed gas flow bypasses the previous expansion machine and directly drives the last-stage expansion machine to rotate and accelerate; the multi-stage preheating module is used for guiding part of gas to carry out reverse-sequence preheating on the previous-stage expansion machines, reverse airflow serves as starting damping and is further used for assisting in stabilizing the rotating speed, the gas completing the preheating task is exhausted through an exhaust valve, speed increasing and reverse-sequence preheating are carried out in parallel, the starting time is greatly shortened, and the starting efficiency is improved. And the starting time of the unit from the cold state to the grid-connected condition is reduced to the minute level.

The invention relates to the technical field of vehicle active control, in particular to a vehicle stabilizing system based on active airflow compensation and a control method, and the system comprises a distributed airflow generation array unit, a multi-source sensing system unit, an intelligent control unit and an energy management unit. Directional compensation airflow is generated through the distributed airflow generation array unit, the multi-source sensing system unit monitors a flow field and motion parameters in real time, the intelligent control unit fuses a hybrid control strategy and reinforcement learning to achieve dynamic compensation and algorithm iteration, and the energy management unit recycles braking energy and optimizes distribution. The stability and response speed of the vehicle in a complex environment are remarkably improved, meanwhile, the airflow utilization rate is increased through the gradient porous material, energy consumption is reduced through reverse airflow power generation, and efficient and energy-saving active stable control is achieved.

The invention relates to the technical field of air conditioning equipment, and discloses ventilation and dust prevention equipment for an air conditioner outdoor unit, which comprises a main body, a rotating groove is formed in the inner wall of the bottom of the main body, and the ventilation and dust prevention equipment further comprises a moving mechanism, and the moving mechanism is mounted in the main body and used for sliding up and down when the main body moves. When air flow is blown to one side of the fan blade, part of air flow moves reversely due to blocking of the choke plate and then blows the air inlet of the main body reversely, so that part of reverse air flow can be generated when the motor rotates forwards and blown to the air inlet, and the situation that the air conditioner is damaged due to the fact that the air conditioner is used for a too long time is reduced. The situation that a large amount of dust adheres to the filter screen at the air inlet, and consequently dust which adheres to the filter screen for a long time and is accumulated is difficult to clean through airflow generated after the motor rotates reversely is avoided, and the cleaning speed of cleaning after the motor is turned over is increased.

The utility model relates to the technical field of gas detection, in particular to a pulverized coal bunker CO gas analysis device which comprises a sampling probe (1), a cleaning structure is arranged on the sampling probe (1); the sampling probe (1) is connected with a detection module; the cleaning structure is used for removing smoke dust, impurities and condensates attached to the surface of the probe and components in the probe by applying reverse airflow into the sampling probe, so that the measurement accuracy is kept, the service life of equipment is prolonged, the maintenance workload is reduced, the sampling flow stability is ensured, and the system reliability is enhanced; the detection module can be used for removing water and possibly residual small particles in the sampled flue gas as well as tiny liquid drops or condensates possibly generated in the dehumidification process; the accurate detection of the CO gas concentration by the device can be effectively realized.

The utility model relates to the technical field of bag-type dust removers, in particular to a bag-type dust remover which comprises a shell, the top end of the shell is communicated with an exhaust port, a compartment rotation switching mechanism comprises six filtering chambers distributed in a honeycomb shape, and an air inlet pipe is fixedly connected to the lower portion of the outer wall of the shell. The control system controls and starts the corresponding pulse blowing pipes to blow downwards to form reverse airflow and strip a dust layer on the surface of the filter bag, the vibration motor drives the whole filter chamber to shake and shake off deep accumulated dust, the dust cleaning effect is good, the shaken-off dust is collected through the dust hopper, finally, the dust is discharged from the dust discharging pipe by opening the dust discharging valve, the pneumatic fluidization rod is started, the airflow enables the dust to be fluidized, and the dust cleaning effect is good. According to the invention, hardening and bridging are prevented, blockage of the ash hopper is avoided, manual knocking intervention is not needed, the safety is high, different filter chambers can be switched to enter a filter mode, and the other filter chambers sequentially enter an ash removal state, so that the device can work continuously without shutdown, and the working efficiency is improved.

The utility model discloses an electronic atomization device. Belongs to the technical field of aerosol generation. In the application, the reverse airflow path is formed among the first enclosure part, the second enclosure part and the first cavity, and the detection surface of the airflow sensor directly faces the enclosure space, so that the airflow sensor can be driven to rotate during suction; the airflow triggering the airflow sensor to generate a feedback detection signal changes the flow direction from the enclosure space to the space between the first enclosure part and the second enclosure part through the second opening, then changes the flow direction to the space between the first enclosure part and the inner wall of the first cavity, enters the second sub-detection air channel, and finally flows out through the first sub-detection air channel. Condensate formed by the aerosol entering the first sub-detection air passage and the second sub-detection air passage is gathered in a space between the second enclosure part and the first cavity under the blocking and guiding of the first sub-enclosure part, so that the condensate is prevented from entering the enclosure space to influence the normal use of the airflow sensor. And the detection air passage is prevented from being blocked by the condensate.

The invention relates to a fan baffle, a fan assembly and cooking equipment. The draught fan baffle comprises an outer ring plate, a transition section and an inner ring plate which are sequentially connected, the inner ring plate is provided with an air return opening penetrating through the inner ring plate in the thickness direction of the draught fan baffle, the height difference exists between the outer ring plate and the inner ring plate in the thickness direction of the draught fan baffle, and the transition section is obliquely arranged towards the inner ring plate by a downward slope. According to the fan baffle provided in the scheme, the height difference is set between the outer ring plate and the inner ring plate, the transition plate located between the outer ring plate and the inner ring plate is obliquely arranged with the downward slope, the plane where the outer ring plate is located is separated from the plane where the inner ring plate provided with the return air inlet is located, and the plane where the return air inlet is located is made to be lower than the plane where the outer ring plate is located in space; traditional front air return is optimized into sunken annular air return, and the problem that edge airflow overflows reversely at an air return opening is solved, so that the mutual influence of air return and air outlet in a hot air system in the cooking equipment is reduced, and the stability of the hot air system is enhanced.

The present application relates to the technical field of stamping die, and discloses a non-woven fabric reinforced plastic pad stamping die, which comprises an upper die unit, a lower die unit and a blockage prevention system; the lower die unit comprises a lower die main body, the lower die main body is sequentially provided with a punching station and a blanking station along the feeding direction of the material belt, and the lower die main body is provided with a blanking channel which is in communication with the lower part of the punching station and the blanking station respectively; the blockage prevention system comprises a blowing execution module which is correspondingly arranged in the blanking channel, a gas supply module which is used for providing a gas source for the blowing execution module and a control module. The blockage prevention system is provided, the blowing unit and the posture sensing unit which are arranged in a high-low staggered manner work cooperatively, the accurate positioning and directional blowing of the jammed material are realized, only the downward thrust is applied from the upper part of the material, the reverse airflow is completely avoided, the success rate of breaking the jam is high, and long-time continuous unmanned production can be realized.

The utility model relates to an endoscope, a gas-water valve and a countercurrent assembly. The countercurrent assembly comprises an anti-countercurrent piece, the anti-countercurrent piece comprises a fixing part and an elastic deformation part arranged on the peripheral side of the fixing part, the fixing part is used for being matched with a connecting part in an air outlet channel of the air-water valve, and the diameter of the elastic deformation part is sequentially increased in the flowing direction of forward airflow of the air outlet channel till the elastic deformation part abuts against the inner wall of the air outlet channel. When the air outlet channel has positive airflow, the positive airflow extrudes the periphery of the elastic deformation part, and the periphery shrinks inwards, so that the positive airflow passes through the space between the elastic deformation part and the inner wall of the air outlet channel; when the air outlet channel has reverse airflow, the reverse airflow extrudes the periphery of the elastic deformation part, and the periphery expands outwards to prevent the reverse airflow from passing through. On the basis of ensuring normal circulation of airflow in the positive direction, the gas cylinder can be prevented from being polluted.

The invention relates to the related technical field of health information monitoring, and discloses integrated health information monitoring equipment and a use method thereof, the equipment comprises a monitor body, and the monitor body is internally provided with an air inlet end, a processing assembly, a condenser, a sensor, a fan and an air outlet end in sequence. The treatment assembly comprises a shell, a cavity unit capable of rotating in the circumferential direction is arranged in the shell, a baffling channel is formed in the cavity unit, and a filtering assembly with a filtering state and a cleaning state is arranged on the baffling channel. The filtering assembly comprises a first arc-shaped filtering plate forming a rough filtering unit and a second arc-shaped filtering plate forming a fine filtering unit. The cavity unit is driven by the driving assembly to rotate, so that the filtering assembly is switched between the filtering station and the cleaning station; the filter resistance change is detected through the differential pressure detector, and when the filter assembly is located at the cleaning station, the cleaning assembly applies reverse airflow to the filter assembly for cleaning.

The invention discloses a high-temperature-resistant, high-pressure-resistant and high-sulfur-resistant special shock-resistant pressure gauge, and relates to the technical field of pressure gauges. The device comprises a pressure measuring pipeline, a piston pressure column, a force sensing resistor, a stress top frame and a heat dissipation and self-cleaning device. And the piston pressure column is connected with the force sensing resistor and the stress top frame, so that pressure dual redundancy measurement is realized. The heat dissipation system comprises an inner side heat dissipation sheet, an outer heat dissipation sheet and a refrigeration secondary sheet, and the driving motor drives air flow to cool, so that the sensor is protected. And the self-cleaning function utilizes reverse airflow to remove dust, so that the maintenance cost is reduced. Isolation design prevents harsh environment from damaging electronic devices, and intelligent heat dissipation adjustment adapts to various working conditions. The problems that an existing pressure gauge is inaccurate in measurement, prone to damage and difficult to maintain are solved, and the pressure gauge is suitable for extreme environment pressure monitoring.

A bracket is arranged in the middle of the interior of a cabinet body, the interior of the cabinet body is divided into a horizontal cavity and a vertical cavity through the bracket, a first vertical plate, a second vertical plate and a transverse plate are arranged in the horizontal cavity, and a ventilation channel is formed in the side, away from the second vertical plate, of the bracket in a penetrating mode in the vertical direction; the cabinet body is provided with a main supporting plate located in the vertical cavity, the cabinet body is provided with an evaporator located at the bottom end in the horizontal cavity and located below the transverse plate, the two sides of the evaporator are each provided with two sets of fans through fan bases, the two sets of fans are staggered, one set of fans faces the second vertical plate, and the other set of fans faces the second vertical plate. According to the utility model, the structure is reasonable, the two groups of fans are arranged in a staggered manner and do not influence each other, the stability of energy consumption improvement caused by reverse blowing is greatly reduced, and the two groups of fans respectively blow to the horizontal cavity and the vertical cavity, so that the energy consumption rate is reduced.

The invention discloses a vehicle air conditioner defrosting control method, electronic equipment and a computer readable storage medium, and belongs to the technical field of vehicle air conditioner control. According to the defrosting control method, when a vehicle air conditioner is in a heating mode, the heating efficiency is guaranteed through a forward airflow path of an outdoor fan and an outdoor heat exchange unit; defrosting triggering conditions are accurately judged on the basis of air conditioner operation parameters and environment parameters, an outdoor fan reverse airflow mode is adopted in the last stage of a defrosting mode, residual defrosting water drops of an outdoor heat exchange unit are removed in a reverse blowing mode, secondary frosting is prevented, it is ensured that defrosting is thorough, and excessive energy consumption is avoided.

The utility model relates to a fire-fighting non-return ventilation pipeline, which comprises an air supply component, a ventilation component and a control component, and is characterized in that the air supply component comprises an air supply pipe and an air port baffle; the two opposite sides of the bottom end of the air supply pipe are each provided with a protruding part in a downwards-protruding mode. The tuyere baffle comprises a baffle main body and side wings; the inner side of the baffle main body is matched and connected with the lug boss; an air supply outlet is formed between the side wings and the bottom end of the air supply pipe; the tuyere baffle is wider than the bottom end of the blast pipe; the connection assembly is connected to one end of the air supply assembly; the connection assembly comprises a connection pipe and an electric shutter; the pipe diameter of the connection pipe is smaller than that of the air supply pipe. The fire-fighting non-return ventilation pipeline is simple in structure and convenient to use, the air port baffle is connected to the bottom end of the air supply pipe, the electric louver is embedded in one end of the connection pipe, reverse airflow can be hindered through the synergistic effect of the air port baffle, the connection pipe and the electric louver, and the non-return effect of the pipeline is greatly improved.

The embodiment of the utility model provides a single-tower VPSA (Vacuum Pressure Swing Adsorption) oxygen generation device adopting a positive and negative pressure all-in-one machine, which comprises an oxygen generation tower body used for loading a filler and performing pressure swing adsorption operation, a filter arranged at a gas inlet of the oxygen generation tower body to filter impurities in gas entering the oxygen generation tower body, and a positive and negative pressure all-in-one machine, wherein the filter is provided with a rotatable flushing rod and a back flushing gas channel, reverse airflow generated in a positive pressure state is used for instantly flushing a filtering layer, a filtering material layer is arranged in the filter to intercept particles, a slag discharging pipe is arranged at the position, located at the lowest end of the filtering material layer, of the filter, and the slag discharging pipe is used for discharging slag. The slag discharge pipe is also provided with a control valve for controlling the on-off of the slag discharge pipe; the positive and negative pressure all-in-one machine is used for alternately applying vacuum extraction and pressurized filling; and the positive and negative pressure all-in-one machine is connected with the oxygen production tower body through a special connecting pipe. Through the scheme of the embodiment of the invention, unsmooth airflow caused by impurity accumulation can be reduced.

The utility model relates to the technical field of plastic processing, in particular to a self-cleaning plastic screw extruder, which comprises a screw extrusion barrel for producing plastic products, a forward and reverse rotation servo motor is mounted at one end of the screw extrusion barrel, and a feed hopper and a self-cleaning reverse blowing machine are mounted at the top of the screw extrusion barrel. According to the utility model, the self-cleaning blowback machine is arranged, and the air outlet connecting air pipe of the self-cleaning blowback machine is in interference insertion fit with the blowback air hole in the top of the screw extrusion barrel, so that during cleaning, the self-cleaning blowback machine can provide reverse airflow to the inside of the screw extrusion barrel, residual plastic on the inner wall of the screw extrusion barrel and a screw is effectively removed, and blockage is avoided; due to the design of the replaceable extrusion head at one end part of the screw extrusion barrel, a user can easily replace extrusion heads with different specifications or functions according to production requirements, and the flexibility and applicability of equipment are improved; in addition, a forward and reverse rotation servo motor is installed, so that the screw rod can work in a reverse rotation mode, and the self-cleaning effect of the equipment is enhanced.

The utility model relates to the technical field of air windows, and discloses a mining air window which comprises a window frame, a rotating door movably connected in the window frame in a sleeved mode, a PLC fixedly installed on one side of the window frame, and a door closing assembly arranged on one side of the window frame and used for closing the rotating door. Through mutual cooperative use of the window frame, the revolving door, the limiting frame, the moving plate, the push-pull electromagnet and the limiting groove, the effect of closing the revolving door is achieved, when reverse airflow (such as gas outburst shock waves) occurs, the revolving door can be quickly pushed to be closed through external force, the situation that the revolving door is difficult to respond quickly due to blockage and the like is avoided, and the service life of the revolving door is prolonged. Meanwhile, under the normal condition, the electromagnetic lock switch is controlled by collecting the air pressure difference between the windward side and the leeward side, a user does not need to manually open the rotating door, ventilation is conducted in time, use is convenient, and practicability is achieved.

This invention relates to the field of automated packaging and surface coating equipment, specifically to an integrated processing device and method for uniform spraying and curing of cosmetic bottle surfaces. It comprises core components such as a multi-axis robotic arm, a coaxial annular atomizing nozzle, a Coanda effect flow guide, a high-frequency ultrasonic transducer, and ultraviolet light-emitting diodes. The device utilizes the atomizing nozzle to generate a pneumatic vector field to transport the coating material, and uses the Coanda effect flow guide to change the direction of the rebounding airflow, forming a centripetal constraint on the main jet. Its core is the high integration of spraying, ultrasonic, and ultraviolet curing components into a single actuator head, enabling wet film spreading and curing to be completed collaboratively in adjacent spaces. This invention effectively reduces the disturbance of the uncured wet film by the reverse airflow, improves the deposition stability at complex contours, and avoids spatial position deviations caused by traditional segmented processing and separate transport.

The invention discloses an air conditioner ventilation device which comprises a ventilation body, a supporting frame, at least two mandrels and at least two non-return blades. An inner cavity of the ventilation main body is provided with an air duct; the supporting frame is mounted in the air duct along the cross section of the air duct; the two ends of the mandrel are connected with the supporting frame in a pivoted mode. Each non-return blade is coaxially connected with each core shaft; when air flow in the air duct flows in the forward direction, all the non-return blades are in an open state. And when the air flow in the air duct flows reversely, each non-return blade is in a closed state. When the wind direction reversely flows, the non-return blades can be rapidly closed, reverse airflow is blocked, outdoor air is prevented from directly entering a cabin to interfere with air circulation, air in the cabin is distributed more evenly, it is ensured that the refrigerating or heating effect of an air conditioning system is not affected by external airflow, the operation load of an air conditioning unit is reduced, and energy consumption is reduced.

The utility model relates to the technical field of masks, and discloses an electric protective mask convenient to use, which comprises a mask body, and ear hanging ropes for personnel to wear are arranged at two ends of the mask body; the air inlet and outlet assemblies are arranged at the two ends of the outer side of the mask body; the auxiliary assembly is arranged on the inner side of the ear hanging rope; when air is inhaled, the fan rotates, air passes through the connecting plate and the shell and then passes through the valve and the filter disc to enter the mask, the air is filtered through the filter disc, and the cleanliness of the air inhaled into the mask body is guaranteed; during expiration, through rotation of the fan, wet water vapor and air flow in the mask body take out reverse air flow from the valve on the right side through the fan, and it is guaranteed that the interior of the mask body is fresh and clean; sponge strips on the hanging rope tightening plates make contact with the rear sides of the ears of a person, the wearing comfort of the mask can be improved, and the situation that the rear sides of the ears are damaged due to the fact that the ear hanging ropes tighten the ears is avoided; and the device can be matched with different people for use.

The present invention provides a portable ventilator suitable for cardiopulmonary resuscitation (CPR) and a control method thereof. According to the present invention, the number of external chest compressions in a CPR process can be automatically recognized on the basis of reverse airflow, and a compression period and a relaxation period can be determined. The portable ventilator has an automatic 30:2 ventilation mode suitable for non-intubated patients and a variable-volume ventilation mode suitable for patients with advanced airways. The present invention can improve the efficiency of first aid and avoid barotrauma, is suitable for the first aid during CPR, and can achieve precise flow control.

The invention relates to a central dust removal device for dust-free wooden door plate processing, and belongs to the technical field of reverse airflow dust separation, the central dust removal device comprises a dust discharge pipe and a plurality of ducts, and the ducts are arranged on the inner wall of the dust discharge pipe and used for introducing airflow into the dust discharge pipe; the main path air passage is connected with a plurality of branch path air passages; the hole channel is connected with the cavity; the branch air passage is connected with the cavity and is used for blowing air flow into the cavity; the slide rheostat comprises a slip sheet, the slip sheet slides in the cavity under the action of airflow, and the resistance value of the slide rheostat is changed after the slip sheet moves; the electromagnetic valve is arranged on the branch air channel; the slide rheostat is connected with the electromagnetic valve; the slide rheostat controls on-off of the solenoid valve after resistance changes. The device has the effect of automatically detecting the position of the wall hanging material in the dust exhaust pipe.

The invention provides a powder electrostatic measurement system, and belongs to the technical field of material electrostatic experiments, the powder electrostatic measurement system comprises a system rack, the system rack is provided with a raw material supply module, an airflow driving module, an experiment pipeline module, a flow monitoring module, an electrostatic measurement module and a powder collection module; the raw material supply module comprises a quantitative discharging mechanism and a powder scattering mechanism. The airflow driving module comprises an air compressor and a powder conveying fan; the flow monitoring module comprises a flow meter, an anti-blocking tee joint and a pulse blower device; the pulse blower device is used for regularly outputting reverse airflow to prevent powder from being accumulated and blocked at a sampling port of the flow meter; the electrostatic measurement module comprises a Faraday cup and an electrostatic charge measurement device; the powder collecting module comprises two powder collecting cylinders which are arranged in series; the problem that influences of different pipeline materials and different section shapes on electrostatic characteristics of powder in an actual industrial scene are difficult to simulate can be solved.

The utility model relates to tempering protection device technical field, especially a kind of preheating burner tempering protection device for gasification device, including preheating burner, first guide ring, second guide surface, connecting sleeve, sealing disc, drainage portion, slide bar and limit sleeve, preheating burner is equipped with 90 ° bending structure in its export end, first guide ring is fixedly installed in preheating burner inner wall, and its bottom surface is equipped with first guide surface.The utility model wherein preheating burner is equipped with 90 ° bending structure in its export end, changes the axial ejection direction of traditional straight-through structure, forces flame to flow along bending path, makes high-temperature gas away from operating area, when tempering occurs, flame blocked by fire-retardant net, reverse airflow pushes sealing disc, drives sealing disc to close first guide ring, forms physical block, reduces flame from preheating burner and avoids preheating burner open end directly towards patrol channel and operator work area to cause direct burn threat.

The invention relates to the technical field of flue gas treatment equipment, and provides a dust removal device for a blast furnace flue gas treatment system, which comprises a box body and a filter bag frame arranged in the box body, and further comprises a driving mechanism and a rapping frame, the rapping frame is arranged in the box body, sleeves which are in one-to-one correspondence and sleeve the lower part of the filter bag frame are arranged in the rapping frame, and first sliding rods are symmetrically arranged on two sides of the rapping frame. According to the invention, the defects in the prior art are overcome, the design is reasonable, the structure is compact, a dust layer with relatively strong adhesive force on the surface of the filter bag can be effectively destroyed and stripped through periodic mechanical rapping in a dust cleaning mode of combining mechanical rapping and pulse blowing, and favorable conditions are created for subsequent blowing; the pulse blowing can provide strong instant reverse airflow, go deep into the filter bag and remove loose fine dust after vibration, the pulse blowing and the filter bag act synergistically, the overall dust removal efficiency and thoroughness are remarkably improved, and the device is particularly suitable for the working condition of dust which is complex in component and possibly viscous in blast furnace flue gas.

The invention relates to an air quality sensor. A housing has a flow channel for guiding air to be measured through the housing; at least part of the first sensor is inserted into the flowing channel, the flowing channel comprises a measuring channel and a bypass channel, and the first sensor is configured to be used for detecting forward airflow flowing in from the first opening and flowing out from the second opening and reverse airflow flowing in from the second opening and flowing out from the first opening. According to the scheme, reverse airflow can be detected, the influence of pulsating airflow is reduced, and the measurement precision is improved.