CN115929698A

CN115929698A - Smoke exhaust fan for fire fighting

Info

Publication number: CN115929698A
Application number: CN202310030105.0A
Authority: CN
Inventors: 吴剑维; 贺小营; 吴波; 张宝; 邵信新; 王昭
Original assignee: Henan Shuangxin Fire Protection Equipment Manufacturing Co ltd
Current assignee: Henan Shuangxin Fire Protection Equipment Manufacturing Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-04-07

Abstract

The invention relates to the technical field of fire fighting, and discloses a smoke exhaust fan for fire fighting, which comprises a base, wherein the top of the base is provided with a shell, a transverse plate is arranged in the middle between the inner walls of two sides of the shell, the middle part of the transverse plate is rotatably connected with a rotating shaft, one end of the rotating shaft is provided with a blade, and the top surface of the transverse plate is provided with a sliding chute.

Description

Smoke exhaust fan for fire fighting

Technical Field

The invention relates to the technical field of fire fighting, in particular to a smoke exhaust fan for fire fighting.

Background

Fire control is the general term of eliminating hidden danger, preventing the disaster, prevent and solve people that meet in life, work, learning process promptly and artificially with nature, accidental calamity, the narrow meaning of course is the meaning of putting out the conflagration in people's understanding initial stage, mainly include the rescue of the scene of fire personnel, the rescue of important facility equipment, historical relic, the safety protection and the rescue of important property, put out the conflagration etc. the purpose is to reduce the destruction degree that the conflagration caused, reduces casualties and loss of property, need use smoke exhaust fan in the fire control.

The invention patent with publication number CN111005881B discloses a fire-fighting smoke exhaust fan, which comprises a shell, a heat insulation cavity, a motor, an impeller and a hub heat insulation device, wherein the heat insulation cavity is a cavity communicated with the shell, the motor is fixed in the heat insulation cavity, a space is reserved between the motor and the heat insulation cavity wall, the impeller is arranged in the shell, the impeller comprises a hub and radiating blades, the radiating blades are fixed on the hub, the hub heat insulation device is arranged on the outer side of the hub and is used for isolating the hub from high-temperature air passing through, and an output shaft of the motor penetrates through the heat insulation cavity wall to be fixedly connected with the hub. Keep apart the motor and the high temperature air through smoke exhaust fan through thermal-insulated chamber, thermal-insulated chamber and external environment direct intercommunication, the direct and external air contact of motor surface dispels the heat, the motor is introduced the motor inside with the external air through the cooling fan of self and is dispelled the heat simultaneously, the two combined action dispels the heat to the motor, heat-proof device is adopted in the wheel hub outside, avoids wheel hub and high temperature air direct contact, guarantees that motor spindle temperature can not be too high.

Although the prior art meets the use requirements of users to a certain extent, certain defects still exist in the use process, and the specific problems are as follows: the smoke exhaust fan has no function of purifying smoke dust, can not effectively filter harmful substances in smoke, can affect the air quality when the smoke dust is directly discharged into the air without being filtered, and can affect the health of people after being inhaled; in addition, although some smoke exhaust fans have a filtering structure, in the using process, the smoke dust contains more large granular substances and residues, so that the filtering structure is easily blocked; in addition, after a long time of idle, dust and impurities can be attached to the filter structure, which affects normal use in case of fire.

In order to solve the problems, the smoke exhaust fan for fire fighting is provided by improving the problem.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme: a smoke exhaust fan for fire fighting comprises a base, wherein a shell is arranged at the top of the base, a transverse plate is arranged in the middle between the inner walls of two sides of the shell, a rotating shaft is rotatably connected to the middle of the transverse plate, a blade is arranged at one end of the rotating shaft, a sliding groove is formed in the top surface of the transverse plate, a spoiler is slidably connected in the sliding groove, a permanent magnet is arranged on the side surface of the top of the spoiler, and an electromagnet is arranged on the rotating shaft at a position corresponding to the permanent magnet;

the middle part of the inner cavity of the shell is provided with a filtering mechanism, the filtering mechanism comprises a fixed seat, the fixed seat is symmetrically arranged at the upper side and the lower side of the inner cavity of the shell, one side of the fixed seat is provided with a second clamping groove, a filtering plate is connected in the second clamping groove in a sliding mode, and the bottom of the side face of the filtering plate is elastically connected with the inner wall of the second clamping groove through a spring;

the dust suppression device is characterized in that a dust suppression mechanism is arranged on one side of the top of the shell and comprises a water pipe arranged on the top surface inside the shell, a plurality of atomizing spray heads are arranged at the bottom of the water pipe, and an electric push rod is arranged between the end of the water pipe and the top surface inside the shell.

Preferably, the other end of the rotating shaft is provided with a driven belt pulley, the top of the shell is provided with a motor, an output shaft of the motor is provided with a driving belt pulley, and the driving belt pulley is in transmission connection with the driven belt pulley through a transmission belt.

Preferably, all be equipped with the supporting leg around the base bottom, the bottom of supporting leg is provided with removes the wheel, the top of shell and the outside that is located the motor are provided with the protection casing, the bottom of protection casing is all around through the top surface of bolt fastening in the shell.

Preferably, a first clamping groove is formed in the other side of the fixing seat, and an active carbon filter element is fixedly connected to an inner cavity of the first clamping groove.

Preferably, a door slot is opened to the side of shell, the side of shell just is located there is the complex side door through hinge swing joint with the door slot corresponds in one side of door slot, one side of side door is equipped with the handle.

Preferably, the inner top surface of the shell is provided with a gas flow sensor.

Preferably, dust fall mechanism still includes water tank and hard tube, inner chamber bottom one side of water tank is equipped with the immersible pump, the hard tube is vertical to be run through the top of shell, the bottom of hard tube pass through the hose with defeated water piping connection, the output of immersible pump with the top of hard tube is connected.

Preferably, a second guide plate is arranged at the position, corresponding to the atomizing nozzle, of the bottom of the inner cavity of the shell, and the second guide plate is of a horizontally-placed trapezoidal structure.

Preferably, the top of water tank is equipped with the water filling port, and the top threaded connection of water filling port has sealed lid, one side of water tank inner chamber bottom is equipped with first guide plate, first guide plate sets up the triangle-shaped structure for the level is placed.

Preferably, a fixing sleeve is sleeved at one end of the water pipe, which is located inside the shell, the top of the fixing sleeve is hinged to the telescopic end of the electric push rod, and the fixed end of the electric push rod is hinged to the top of the inner cavity of the shell.

Compared with the prior art, the invention provides a smoke exhaust fan for fire fighting, which has the following beneficial effects:

1. when a fire disaster occurs, the smoke can be purified by water mist, the smoke is subjected to dust fall to remove large-particle substances in the smoke, fine particles in the smoke are adsorbed by the filtering mechanism, and harmful substances in the smoke, such as volatile organic compounds formaldehyde, toluene, hydrogen sulfide and air pollutants, can be filtered to further purify the smoke.

2. The invention can realize the cleaning and maintenance of the smoke exhaust fan when no fire occurs, ensures that the smoke exhaust fan is in a normal working state at any time, and avoids influencing the smoke exhaust effect when a fire occurs.

3. The invention can realize the blockage clearing of the filter plate when a fire disaster happens and the filter plate is blocked, and can reduce the load of the filter plate and avoid the influence of excessive attached smoke dust on the blockage clearing and filtering when the fire disaster happens in order to ensure the blockage clearing effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the housing of the present invention;

FIG. 3 is a schematic view of the filter mechanism of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 5 is a schematic view of the structure of the water pipe of the present invention;

FIG. 6 is an enlarged view of the structure at B in FIG. 2 according to the present invention.

Wherein: 1. a base; 2. a moving wheel; 3. supporting legs; 4. a housing; 401. a gas flow sensor; 5. a dust falling mechanism; 501. a water tank; 502. a submersible pump; 503. a water injection port; 504. a water delivery pipe; 505. a first baffle; 506. an electric push rod; 507. fixing a sleeve; 508. an atomizing spray head; 6. a protective cover; 7. a filtering mechanism; 701. a fixed seat; 702. an activated carbon filter element; 703. a first card slot; 704. a second card slot; 705. a filter plate; 706. a spring; 8. an electric motor; 9. a drive pulley; 10. a blade; 11. a rotating shaft; 12. a transverse plate; 13. a driven pulley; 14. a second baffle; 15. a spoiler; 16. a permanent magnet; 17. a side door; 18. an electromagnet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

First embodiment

Referring to fig. 1-3 and 4, the embodiment provides a smoke exhaust fan for fire fighting, including a base 1, a housing 4 is disposed on the top of the base 1, a horizontal plate 12 is disposed in the middle between the inner walls of the two sides of the housing 4, a rotation shaft 11 is rotatably connected to the middle of the horizontal plate 12, a blade 10 is disposed at one end of the rotation shaft 11, a driven pulley 13 is disposed at the other end of the rotation shaft 11, a motor 8 is disposed on the top of the housing 4, a driving pulley 9 is disposed on an output shaft of the motor 8, the driving pulley 9 is in transmission connection with the driven pulley 13 through a transmission belt, specifically, the driving pulley 9 is driven to rotate by the rotation of the motor 8, the driven pulley 13 is driven to rotate through the transmission belt, so as to rotate the blade 10 through the rotation shaft 11, and smoke can be sucked from one end of a water pipe 504 by using generated wind power and discharged from one end of the blade 10.

4 inner chambers of shell middle part is provided with filter mechanism 7, filter mechanism 7 includes fixing base 701, the upper and lower both sides of 4 inner chambers of shell are located to fixing base 701 symmetry, first draw-in groove 703 has been seted up to fixing base 701's opposite side, fixedly connected with active carbon filter core 702 in the first draw-in groove 703, second draw-in groove 704 has been seted up to one side of fixing base 701, the inner chamber sliding connection of second draw-in groove 704 has filter 705, and is concrete, inspiratory smog is at first contacted with filter 705 after dust fall mechanism 5, detach the great particulate matter of partial volume and residue, contact with active carbon filter core 702 again, further realize eliminating the filtration of tiny particulate matter and partial toxic gas.

Top one side of shell 4 is provided with dust fall mechanism 5, and dust fall mechanism 5 includes the hard tube, the vertical top that runs through shell 4 of hard tube, and there is raceway 504 bottom of hard tube through hose connection, and the bottom of raceway 504 is equipped with a plurality of atomizer 508.

Dust fall mechanism 5 still includes water tank 501, inner chamber bottom one side of water tank 501 is equipped with immersible pump 502, immersible pump 502's output is connected with the top of hard tube, one side of water tank 501 inner chamber bottom is equipped with first guide plate 505, it is concrete, through setting up first guide plate 505, the effect of water conservancy diversion can be played, avoid water to pile up in the bottom of water tank 501 inner chamber, first guide plate 505 sets up the triangle-shaped structure of placing for the level, the top of water tank 501 is equipped with water filling port 503, and the top threaded connection of water filling port 503 has a sealed lid, the position that shell 4 inner chamber bottom corresponds with atomizer 508 is equipped with second guide plate 14, second guide plate 14 sets up the trapezium structure of placing for the level, it is concrete, utilize immersible pump 502 to take the water in the water tank 501 out and send into raceway 504, at last through atomizer 508 blowout can realize the smog dust fall to the process, detach bulky impurity and particulate matter simultaneously, through setting up second guide plate 14, the effect of water conservancy diversion can be played, avoid water after spraying to pile up in the bottom of shell 4 inner chamber.

All be equipped with supporting leg 3 around base 1 bottom, the bottom of supporting leg 3 is provided with removes wheel 2, and is concrete, through setting up supporting leg 3 and removing wheel 2, can make this device conveniently remove, and the people of being convenient for carry, the top of shell 4 and the outside that is located motor 8 are provided with protection casing 6, and the bottom of protection casing 6 is fixed in the top surface of shell 4 through the bolt all around, and is concrete, through setting up protection casing 6, can protect motor 8, improves motor 8's life.

The door slot has been seted up to the side of shell 4, the side of shell just is located one side of door slot has the side door 17 that corresponds the complex with the door slot through hinge swing joint, one side of side door 17 is equipped with the handle. Specifically, through setting up side door 17, can make things convenient for people to take out activated carbon filter 702 and filter 705 and change.

When the device is used, the output end of the motor 8 drives the driving pulley 9 to rotate, the driving pulley 9 drives the driven pulley 13 to rotate through the transmission of the transmission belt, the driven pulley 13 drives the rotating shaft 11 to rotate, the rotating shaft 11 drives the blade 10 to rotate, so that one end of the water pipe 504 generates attraction, smoke exhaust work is performed through one end of the blade 10, smoke sucked into the inner cavity of the shell 4 through the rotation of the blade 10 firstly passes through the atomizing spray head 508, the submersible pump 502 sucks water in the water tank 501, then the output end of the submersible pump 502 atomizes the water through the water pipe 504 and the atomizing spray head 508 and sprays out the atomized water to reduce dust in the smoke, large granular substances and residues in the smoke are removed, the load of the filter plate 705 is reduced, the purification effect is improved, then the smoke passes through the filter plate 705 and the activated carbon filter core 702 in sequence, large-sized particulate matters and residues in the smoke are removed firstly, and fine particulate matters and part of toxic gases in the smoke are filtered by using the activated carbon filter core 702, such as volatile organic compounds formaldehyde, toluene, hydrogen sulfide and air pollutants smoke dust are fully purified, and then the filtered smoke is discharged from one end of the blade 10.

Second embodiment

Please refer to fig. 4 and fig. 6, a smoke exhaust fan for fire protection provided based on the first embodiment, in the actual using process, because the probability of fire occurrence is very low, the smoke exhaust fan is in an idle state for most of the time, after being idle for a long time, more dust impurities can be attached to the outer side of the filter plate 705, resulting in the blockage of the filter plate 705, therefore, the smoke exhaust effect of the smoke exhaust fan can be greatly reduced when fire occurs, seriously threatening the life safety of indoor personnel, in addition, when the duration of fire is longer or more serious, the amount of smoke discharged is more, after the smoke exhaust fan works for a period of time, the filter plate 705 can be blocked due to more attached smoke and residue, reducing the smoke exhaust effect, in order to solve the above problems:

the top surface of the transverse plate 12 is provided with a sliding groove, a spoiler 15 is slidably connected in the sliding groove, a permanent magnet 16 is arranged on the top side surface of the spoiler 15, an electromagnet 18 is arranged at a position, corresponding to the permanent magnet 16, on the rotating shaft 11, specifically, in the rotating process of the rotating shaft 11, the electromagnet 18 is started, the polarities of the electromagnet 18 and the permanent magnet 16 are the same, so that the spoiler 15 slides upwards by utilizing magnetic repulsion, after the electromagnet 18 is far away from the permanent magnet 16, the spoiler 15 falls down and resets under the action of gravity, and the rotation of the rotating shaft 11 is utilized to realize intermittent matching between the electromagnet 18 and the permanent magnet 16, so that the periodic reciprocating lifting of the spoiler 15 is realized, and further the disturbance of passing air flow is realized, it should be noted that, in order to ensure that the ventilation quantity of the upper side and the lower side of the transverse plate 12 is the same, the distance between the top end of the spoiler 15 and the rotating shaft 11 is equal to the distance between the bottom surface of the transverse plate 12 and the rotating shaft 11.

The bottom of the side surface of the filter plate 705 is elastically connected with the inner wall of the second clamping groove 704 through a spring 706, and the spring 706 can realize the reciprocating vibration of the filter plate 705 in the first clamping groove 703 and the second clamping groove 704 respectively under the action of disturbed air flow.

Be equipped with electric putter 506 between the tip of raceway 504 and the inside top surface of shell 4, raceway 504 is located the inside pot head of shell 4 and is equipped with fixed cover 507, the top of fixed cover 507 is articulated with electric putter 506's flexible end, electric putter 506's stiff end is articulated with shell 4's inner chamber top, specifically, utilize electric putter 506's flexible one end luffing motion that realizes raceway 504 and keep away from immersible pump 502 through fixed cover 507, adjust the spray angle of atomizer 508.

The inner top surface of the housing 4 is provided with a gas flow sensor 401, and in particular, the gas flow sensor 401 is used for monitoring the flow of gas discharged from the housing 4.

When the device of this embodiment is in use, when not taking place a fire, in order to guarantee that the normal use can be taken place when taking place a fire, need regularly maintain this smoke exhaust fan for fire control, it should be explained at first, because the filter 705 is located the outside, and the active carbon filter core 702 is located between blade 10 and the filter 705, and there is diaphragm 12 again between active carbon filter core 702 and the blade 10, therefore, in actual conditions, one side that the filter 705 is close to raceway 504 can preferentially block up, and when taking place a fire, because the filter 705 is close to the air inlet, and can protect active carbon filter core 702, so the outside of filter 705 still can preferentially take place to block up.

During maintenance, the motor 8 and the gas flow sensor 401 are started first, rotation of the rotating shaft 11 is realized by rotation of the motor 8, then the blade 10 is driven to rotate, exhaust from one end of the blade 10 is realized, when the gas flow sensor 401 monitors that the flow of the exhausted gas is smaller than a first threshold value set by the gas flow sensor 401, blockage of the filter plate 705 is actively judged, at the moment, the motor 8 is driven to rotate reversely, reverse rotation of the blade 10 is realized, air is fed from one end of the blade 10, exhaust is carried out from one end of the water pipe 504, dust and impurities attached to the filter plate 705 can be blown off, meanwhile, in the process of reverse rotation of the blade 10, as the filter plate 705 is connected in the second clamping groove 704 in a sliding manner, the filter plate 705 slides to one side of the second guide plate 14, at the moment, the spring 706 close to one side of the second guide plate 14 is compressed, and the spring 706 on the other side is stretched, the electromagnet 18 is started at the same time, so that the polarity between the electromagnet 18 and the permanent magnet 16 is the same, the upward movement of the spoiler 15 is realized when the electromagnet 18 corresponds to the permanent magnet 16, when the electromagnet 18 is far away from the permanent magnet 16, the spoiler 15 falls down and resets under the action of the gravity of the spoiler 15, so that the exhaust amount on the upper side of the transverse plate 12 is reduced, the wind pressure borne by the filter plate 705 is reduced due to the reduction of the ventilation amount, the filter plate 705 partially resets, at the moment, the filter plate 705 slides to one side far away from the second flow guide plate 14, so that the up-and-down reciprocating sliding of the spoiler 15 can be realized by utilizing the magnetic repulsion between the electromagnet 18 and the permanent magnet 16 and the periodic rotation of the electromagnet 18 driven by the rotating shaft 11, the throughput of the airflow can be intermittently changed, the disturbance to the airflow is realized, the reciprocating vibration of the filter plate 705 can be realized under the action of the spring 706 by utilizing the intermittent change of the ventilation amount, and then the dust impurities attached to the filter plate 705 can be shaken off, thereby realizing the blockage removal of the filter plate 705.

After the blockage is cleared, starting a machine tester, enabling the motor 8 to rotate forward, utilizing the blade 10 to normally exhaust to the outside, simultaneously utilizing the gas flow sensor 401 to detect the exhaust gas flow, when the gas flow sensor 401 detects that the exhaust gas flow is still smaller than a first threshold value set by the gas flow sensor 401, utilizing the extension of the electric push rod 506 to drive the fixing sleeve 507 to move downwards, enabling the water conveying pipe 504 to be in an inclined state, enabling the atomizing spray head 508 to face the side surface of the filter plate 705, enabling the motor 8 to stop working, simultaneously starting the submersible pump 502, thereby spraying the filter plate 705, removing dust impurities tightly attached to the filter plate 705, after the spraying is finished, enabling the motor 8 to rotate reversely, exhausting air to one side of the water conveying pipe 504, thereby realizing the air drying of the filter plate 705, conducting the machine tester again after the air drying is finished, when the gas flow sensor 401 detects that the exhaust gas flow is larger than the first threshold value set by the gas flow sensor 401, then judging that the clearing is finished, thereby completing the cleaning and the maintenance of the smoke exhaust fan, and restoring the smoke exhaust fan to a state to be in a waiting working state.

It is worth noting that the atomizing nozzle 508 is used for cleaning the filter plate 705, the blades 10 are used for reversely rotating to air-dry the filter plate 705, the duration time of the process is long, and the workload is large, so that in order to improve the maintenance efficiency, the modes of reverse blowing of the blades 10 and vibration of the filter plate 705 are preferably selected for clearing blockage, and after the atomizing nozzle 508 is used for cleaning, the same amount of water needs to be supplemented into the water tank 501.

In addition, when a fire occurs, the smoke exhaust fan is automatically started by an indoor fire fighting fire sensing system to exhaust smoke to the outside through one end of the blade 10, in the smoke exhaust process, the gas flow sensor 401 is used for monitoring the flow of exhausted gas in real time, when the gas flow sensor 401 detects that the flow of the exhausted gas is smaller than a second threshold value set by the gas flow sensor 401, the blockage of the filter plate 705 is actively judged, in order to ensure the life safety of indoor personnel, at the moment, the smoke exhaust fan continues to perform smoke exhaust work, and at the moment, the filter plate 705 slides to one side of the blade 10, the spring 706 close to one side of the blade 10 is compressed, the electromagnet 18 is started at the same time, when the electromagnet 18 corresponds to the permanent magnet 16, the magnetic repulsion force is used for enabling the spoiler 15 to move upwards, the ventilation quantity on the upper side of the transverse plate 12 is reduced, the spring 706 drives the filter plate 705 to partially reset, the filter plate 705 slightly slides to one side of the second guide plate 14, and when the electromagnet 18 is far away from the permanent magnet 16, the spoiler 15 falls and resets, so that the filter plate 18 is driven by the rotating shaft 11 to periodically rotate to realize the vibration of the filter plate 705, thereby realizing the smoke exhaust while cleaning the smoke exhaust smoke.

In addition, when the indoor fire fighting fire sensing system detects that the fire is strong or the amount of smoke is large, the electric push rod 506 is started, and the electric push rod 506 is contracted, so that the water pipe 504 in the housing 4 is in an inclined state in an inclined direction, at the moment, the atomizing nozzle 508 faces the outer side of the housing 4, so that the water sprayed by the atomizing nozzle 508 can form convection with the smoke entering the housing 4, the smoke purification effect is improved, and the load of the filter plate 705 is reduced, furthermore, because the attraction generated at one end of the water pipe 504 inside the housing 4 can attract the sprayed water mist to move towards the inside of the housing 4, and the inclined direction of the water pipe 504 can lead the water mist sprayed by the atomizing nozzle 508 to further keep away from the filter plate, so that the travel distance of the sprayed water mist entering the housing 4 is increased, and further, under the action of wind attraction, in the process of the sprayed water mist entering the housing 4, because of the increase of the distance, the water mist can be fully contacted with the large granular substances in the smoke, the purification effect of the large granular substances in the smoke is improved, the load of the filter plate 705 is reduced, the situation that the blockage of the filter plate 705 is cleared and the smoke dust is continuously attached to the filter plate 705 to influence the blockage clearing of the filter plate 705 in the smoke exhausting process is avoided, meanwhile, the water mist sprayed out remotely is matched with the spoiler 15 which reciprocates up and down in the process of approaching the filter plate 705 under the action of wind power to realize the irregular feeding of the water mist, the speed of the smoke dust and the particulate matters and residues carried in the smoke dust entering the shell 4 can be reduced, the sprayed water mist can be fully contacted with the large-volume granular residues in the smoke dust, the purification effect of the smoke dust is improved, and meanwhile, more particulate matters and residues are prevented from being attached to the filter plate 705, the filter plate 705 is relieved of load and assists other sprinkler equipment in extinguishing the fire.

Therefore, the invention can realize the cleaning and maintenance of the smoke exhaust fan when no fire occurs, ensure that the smoke exhaust fan is in a normal working state at any time, avoid the influence on the smoke exhaust effect when a fire occurs, in addition, realize the blockage removal of the filter plate 705 when the filter plate 705 is blocked when a fire occurs, and effectively reduce the load of the filter plate 705 for ensuring the blockage removal effect and avoiding the influence on the blockage removal and filtration effects caused by excessive attached smoke dust when a fire occurs.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a smoke exhaust fan is used in fire control which characterized in that: the electromagnetic interference shielding device comprises a base, wherein a shell is arranged at the top of the base, a transverse plate is arranged in the middle between the inner walls of two sides of the shell, a rotating shaft is rotatably connected to the middle of the transverse plate, a blade is arranged at one end of the rotating shaft, a sliding groove is formed in the top surface of the transverse plate, a spoiler is slidably connected in the sliding groove, a permanent magnet is arranged on the side surface of the top of the spoiler, and an electromagnet is arranged on the rotating shaft at a position corresponding to the permanent magnet;

2. The smoke exhaust fan for fire fighting of claim 1, characterized in that: the other end of pivot is equipped with driven pulley, the top of shell is equipped with the motor, the output shaft of motor is equipped with driving pulley, driving pulley passes through the drive belt transmission with driven pulley and is connected.

3. The smoke exhaust fan for fire fighting of claim 2, characterized in that: the base bottom all be equipped with the supporting leg all around, the bottom of supporting leg is equipped with removes the wheel, the top of shell and the outside that is located the motor are provided with the protection casing, the bottom of protection casing is fixed in the top surface of shell through the bolt all around.

4. The smoke exhaust fan for fire fighting of claim 1, characterized in that: a first clamping groove is formed in the other side of the fixing seat, and an active carbon filter element is fixedly connected to the inner cavity of the first clamping groove.

5. The smoke exhaust fan for fire fighting of claim 1, characterized in that: the side of shell has seted up the gate slot, the side of shell just is located one side of gate slot has the side door that corresponds the complex with the gate slot through hinge swing joint, one side of side door is equipped with the handle.

6. The smoke exhaust fan for fire fighting according to claim 1, characterized in that: and a gas flow sensor is arranged on the top surface inside the shell.

7. The smoke exhaust fan for fire fighting of claim 1, characterized in that: dust fall mechanism still includes water tank and hard tube, inner chamber bottom one side of water tank is equipped with the immersible pump, the hard tube is vertical to be run through the top of shell, the bottom of hard tube pass through the hose with defeated water piping connection, the output of immersible pump with the top of hard tube is connected.

8. The smoke exhaust fan for fire fighting according to claim 1, characterized in that: and a second guide plate is arranged at the bottom of the inner cavity of the shell and at a position corresponding to the atomizing nozzle, and the second guide plate is of a horizontally-placed trapezoidal structure.

9. The smoke exhaust fan for fire fighting according to claim 7, characterized in that: the top of water tank is equipped with the water filling port, and the top threaded connection of water filling port has sealed lid, one side of water tank inner chamber bottom is equipped with first guide plate, first guide plate sets up the triangle-shaped structure for the level is placed.

10. The smoke exhaust fan for fire fighting of claim 1, characterized in that: the water pipe is characterized in that a fixing sleeve is sleeved at one end, located inside the shell, of the water pipe, the top of the fixing sleeve is hinged to the telescopic end of the electric push rod, and the fixed end of the electric push rod is hinged to the top of the inner cavity of the shell.