CN111701375A - A haze canopy falls in environmental protection for outdoor large-scale scene of burning - Google Patents

A haze canopy falls in environmental protection for outdoor large-scale scene of burning Download PDF

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Publication number
CN111701375A
CN111701375A CN202010514207.6A CN202010514207A CN111701375A CN 111701375 A CN111701375 A CN 111701375A CN 202010514207 A CN202010514207 A CN 202010514207A CN 111701375 A CN111701375 A CN 111701375A
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CN
China
Prior art keywords
fixed
haze
shed
support
support plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010514207.6A
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Chinese (zh)
Inventor
顾伟国
Original Assignee
顾伟国
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 顾伟国 filed Critical 顾伟国
Priority to CN202010514207.6A priority Critical patent/CN111701375A/en
Publication of CN111701375A publication Critical patent/CN111701375A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/60Combinations of devices covered by groups B01D46/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/18Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for improving resistance to wear, e.g. inserts or coatings; for indicating wear; for handling or replacing worn parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/035Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material to several spraying apparatus

Abstract

The invention relates to the field of haze reduction equipment, in particular to an environment-friendly haze reduction shed for an outdoor large incineration site, which comprises a supporting component, a haze removal component and a haze reduction component, wherein the supporting component comprises a shed roof, a support, a shed film and a zipper, the shed roof is fixed at the upper end of the support, the shed film is fixed on the outer surfaces of the shed roof and the support, the zipper is fixed on the shed film, when a spray head is damaged during use, a motor is started, the rotation of an output shaft of the motor drives a gear transmission part to rotate, the rotation of the gear transmission part drives a threaded sleeve and a sliding sleeve to move upwards or downwards, namely the downward or downward movement of a water pipe is realized, the steering of the output shaft of the motor is controlled, the spray head is moved downwards to a proper position, and an operator can maintain or replace the spray head more conveniently, the personal safety of the working personnel is greatly improved.

Description

A haze canopy falls in environmental protection for outdoor large-scale scene of burning
Technical Field
The invention relates to the field of haze reduction equipment, in particular to an environment-friendly haze reduction shed for an outdoor large-scale incineration site.
Background
Haze, also known as haze or dust haze, refers to a turbid phenomenon caused by suspension of a large amount of particles such as smoke and dust of unknown cause. The core material of haze is airborne dust particles, known aerologically as aerosol particles. In recent years, the appearance frequency of the weather phenomenon of haze is higher and higher, so that the air quality is gradually deteriorated. The haze contains hundreds of atmospheric chemical particulate matters which invade the respiratory tract and the lung and the lobe of the human body when people have no precaution, so that diseases of the respiratory system, cardiovascular system, blood system, reproductive system and the like are caused, such as pharyngolaryngitis, emphysema, asthma, rhinitis, bronchitis and other inflammations, the lung cancer, myocardial ischemia and injury can be induced after the haze is kept in the environment for a long time, and the haze often causes traffic accidents.
At present, the haze canopy falls in the environmental protection that is used for outdoor large-scale burning scene, after the watering shower nozzle breaks down in the big-arch shelter, needs the staff to climb and maintains or change the watering shower nozzle, great reduction staff's personal safety.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an environment-friendly haze-reducing shed for an outdoor large-scale incineration site, aiming at improving the problem of greatly reducing the personal safety of workers.
The invention discloses an environment-friendly haze-reducing shed for outdoor large-scale incineration sites, which comprises a supporting component, a haze-removing component and a haze-reducing component, wherein the supporting component comprises a shed roof, a support, a shed film and a zipper, the shed roof is fixed at the upper end of the support, the shed film is fixed on the shed roof and the outer surface of the support, the zipper is fixed on the shed film, the haze-removing component comprises a hollow column, a negative pressure fan, filter cotton, an active carbon filter layer and an air filter screen, the hollow column is fixed on the shed roof, the negative pressure fan is fixed in the hollow column, the filter cotton is fixed in the hollow column, the active carbon filter layer is fixed in the hollow column, the air filter screen is fixed in the hollow column, the haze-reducing component comprises a first supporting plate, a sliding rod, a sliding sleeve, a water pipe, a threaded sleeve, a motor and a haze-reducing component, A gear transmission part, a second support plate, a spray head, a hose and a screw rod, wherein the second support plate is fixed on the side surface of the bracket, the first supporting plate is also fixed on the side surface of the bracket, one end of the screw rod is rotated on the lower surface of the first supporting plate, the other end of the screw rod rotates on the upper surface of the second supporting plate, the threaded sleeve is sleeved on the screw rod in a threaded manner, the slide bar is fixed between the first supporting plates, the sliding sleeve is sleeved on the slide bar in a sliding way, the water pipe is fixed between the sliding sleeve and the threaded sleeve, the motor is fixed on the upper surface of the second supporting plate, the screw rod and the output shaft of the motor are driven together through the gear transmission part, the lower end of the hose is fixed on the upper surface of the water pipe, and the spray head is fixed on the lower surface of the water pipe.
Preferably, the shed roof comprises a shed roof body, a through hole is formed in the shed roof body, and the hollow column is fixed in the through hole in a sealing mode.
Preferably, the support assembly further comprises a dust screen, the dust screen being provided on the greenhouse film.
Preferably, the hollow column comprises a hollow column body and a sound absorption layer, the hollow column body is fixed in the shed roof, and the sound absorption layer is fixed on the inner wall of the hollow column body.
Preferably, remove the haze subassembly and still include the cowl, the lower surface of cowl is fixed the upper surface of hollow post.
Preferably, the motor includes a motor body and a protective housing, the protective housing is fixed to the upper surface of the second support plate, and the motor body is fixed to the inner wall of the protective housing.
Preferably, the gear transmission part comprises a first bevel gear and a second bevel gear, the first bevel gear is fixed on the screw rod, the second bevel gear is fixed on the output shaft of the motor, and the first bevel gear and the second bevel gear are meshed.
Preferably, the second support plate includes a second support plate body fixed on the side surface of the bracket, and an inclined bar fixed between a lower surface of the second support plate body and the side surface of the bracket.
Preferably, fall the haze subassembly and still include and rotate the piece, it fixes respectively to rotate the piece first backup pad with in the second backup pad, the lead screw rotates and is in rotate in the piece.
Preferably, the support assembly further comprises a connecting plate fixed to a lower surface of the bracket.
The invention has the beneficial effects that: when the environment-friendly haze-reducing shed is used, after combustible materials in the shed are burnt, water is introduced into the hose, the water is sprayed downwards from the spray head through the water pipe, dust particles in the air are adsorbed by the water mist, dust haze in the shed is eliminated quickly, and the efficiency of clearing the dust haze is improved greatly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a block diagram of a three-dimensional structure in an embodiment;
FIG. 2 is a partial structural view in the embodiment;
FIG. 3 is an internal structural view in the embodiment;
FIG. 4 is an enlarged view at A in FIG. 3 in the example;
FIG. 5 is an enlarged view at B in FIG. 3 in the example;
FIG. 6 is a structural diagram of a haze reduction assembly in an embodiment;
FIG. 7 is an enlarged view at C in FIG. 6 in the example;
FIG. 8 is a motor mounting diagram in the embodiment;
FIG. 9 is an enlarged view at D in FIG. 8 in the example;
FIG. 10 is a cross-sectional view of the haze removal assembly in an embodiment;
description of reference numerals: 100-a support assembly; 110-shed roof; 111-ceiling body; 112-a through hole; 120-a scaffold; 130-greenhouse film; 140-a zipper; 150-dust screen; 160-a connecting plate; 200-a haze removal assembly; 210-hollow column; 211-hollow column body; 212-sound absorbing layer; 220-a guide cover; 230-a negative pressure fan; 240-filter cotton; 250-an activated carbon filter layer; 260-air filtering net; 300-haze reducing component; 310-a first support plate; 320-a sliding bar; 330-a sliding sleeve; 340-a water pipe; 350-thread bush; 360-motor; 361-motor body; 362-a protective housing; 370-a gear drive; 371 — a first bevel gear; 372-second bevel gear; 380-a second support plate; 381-second support plate body; 382-a diagonal bar; 390-a rotating member; 391-spraying head; 392-a hose; 393-lead screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 to 10, the environment-friendly haze-reducing shed for outdoor large-scale incineration sites comprises a supporting assembly 100, a haze-removing assembly 200 and a haze-reducing assembly 300. Remove haze subassembly 200 and fix on supporting component 100, fall haze subassembly 300 and fix in supporting component 100, fall haze subassembly 300 and make the quick clearance of grey haze.
Referring to fig. 1 to 3, the supporting assembly 100 includes a ceiling 110, a support 120, a greenhouse film 130 and a zipper 140, the ceiling 110 is fixed at the upper end of the support 120, the ceiling 110 includes a ceiling body 111, a through hole 112 has been opened on the ceiling body 111, a hollow column 210 is fixed in the through hole 112 through a bolt seal, the through hole 112 is convenient for dismounting the hollow column 210, the greenhouse film 130 is fixed at the outer surfaces of the ceiling 110 and the support 120 through a bolt, the zipper 140 is sewed on the greenhouse film 130, the supporting assembly 100 further includes a dust screen 150, the dust screen 150 is arranged on the greenhouse film 130, the greenhouse film 130 prevents external dust from entering the environment-friendly haze-reducing shed, the supporting assembly 100 further includes a connecting plate 160, the connecting plate 160 is welded at the lower surface of the support 120, and the connecting plate 160 is convenient for installing and fixing the environment-friendly haze-removing shed.
Referring to fig. 1 and 10, the haze removing assembly 200 includes a hollow column 210, a negative pressure fan 230, the haze removal device comprises filter cotton 240, an active carbon filter layer 250 and an air filter screen 260, wherein a hollow column 210 is fixed on a shed roof 110 through bolts, a negative pressure fan 230 is fixed in the hollow column 210 through bolts, the hollow column 210 comprises a hollow column body 211 and a sound absorption layer 212, the hollow column body 211 is fixed in the shed roof 110, the sound absorption layer 212 is adhered to the inner wall of the hollow column body 211, the sound absorption layer 212 greatly reduces noise generated when the negative pressure fan 230 works, the filter cotton 240 is fixed in the hollow column 210 through bolt sealing, the active carbon filter layer 250 is fixed in the hollow column 210 through bolt sealing, the air filter screen 260 is fixed in the hollow column 210 through bolt sealing, the haze removal assembly 200 further comprises a guide cover 220, the lower surface of the guide cover 220 is fixed on the upper surface of the hollow column 210 through bolts, and the guide cover 220 enables air in a greenhouse to be discharged more smoothly.
Referring to fig. 3 to 9, the haze reducing assembly 300 includes a first support plate 310, a slide rod 320, a sliding sleeve 330, a water pipe 340, a threaded sleeve 350, a motor 360, a gear transmission member 370, a second support plate 380, a spray head 391, a hose 392 and a screw rod 393, the second support plate 380 is welded on a side surface of the bracket 120, the first support plate 310 is also welded on a side surface of the bracket 120, one end of the screw rod 393 is rotated on a lower surface of the first support plate 310, the other end of the screw rod 393 is rotated on an upper surface of the second support plate 380, the threaded sleeve 350 is threadedly sleeved on the screw rod 393, the slide rod 320 is welded between the first support plates 310, the sliding sleeve 330 is slidingly sleeved on the slide rod 320, the water pipe 340 is fixed between the sliding sleeve 330 and the threaded sleeve 350 by bolts, the motor 360 is fixed on an upper surface of the second support plate 380 by bolts, the second support plate 380 includes a second support plate body, the inclined rods 382 are welded between the lower surface of the second support plate body 381 and the side surface of the bracket 120, and the inclined rods 382 make the load-bearing force of the second support plate body 381 stronger.
Referring to fig. 3, 4, 8 and 9, the motor 360 includes a motor body 361 and a protective housing 362, the protective housing 362 is fixed on the upper surface of the second support plate 380 by bolts, the motor body 361 is fixed on the inner wall of the protective housing 362 by bolts, the protective housing 362 protects the motor body 361 from water erosion, the motor body 361 in this embodiment is a servo motor, the lead screw 393 and the output shaft of the motor 360 are driven together by a gear transmission 370, the gear transmission 370 includes a first bevel gear 371 and a second bevel gear 372, the first bevel gear 371 is connected to the lead screw 393, the second bevel gear 372 is connected to the output shaft of the motor 360 by keys, the first bevel gear 371 is engaged with the second bevel gear 372, the first bevel gear 371 and the second bevel gear 372 are convenient for controlling the rotation of the lead screw 393, the lower end of the hose 392 is fixed on the upper surface of the water pipe 340 by bolts, the spray head 391 is fixed on the lower surface of the water pipe 340 by bolts, the haze reducing assembly 300 further comprises a rotating member 390, the rotating member 390 is respectively fixed in the first supporting plate 310 and the second supporting plate 380, the screw rod 393 rotates in the rotating member 390, the rotating member 390 facilitates the rotation of the screw rod 393, and the rotating member 390 in this embodiment is a bearing.
Specifically, this a theory of operation that is used for outdoor large-scale environmental protection of burning scene to fall haze canopy: when the environment-friendly haze-reducing shed is used, when the environment-friendly haze-reducing shed is incinerated, the negative pressure fan 230 is started, the negative pressure fan 230 enables the shed to form a negative pressure state, dust and haze gushes into the hollow column 210, the dust and haze in the shed is filtered under the combined action of the filter cotton 240, the activated carbon filter layer 250 and the air filter screen 260, the degree of pollution of the dust and haze to the external environment is greatly reduced, after the combustible substances in the shed are incinerated, water is introduced into the hose 392, the water is downwards sprayed out from the spray nozzle 391 through the water pipe 340, the dust and haze in the air are adsorbed by the water mist, the dust and haze in the shed is quickly eliminated, the dust and haze removing efficiency of the dust and haze is greatly improved, when the shed is not used, when the spray nozzle 391 is damaged, the motor 360 is started, the rotation of the output shaft of the motor 360 drives the gear transmission piece 370 to rotate, the rotation of the, the downward or downward movement of the water pipe 340 is realized, the rotation of the output shaft of the motor 360 is controlled, the spray head 391 moves downward to a proper position, an operator can maintain or replace the spray head 391 more conveniently, and the personal safety of workers is greatly improved.
It should be noted that the specific model specifications of the negative pressure fan 230 and the motor 360 need to be determined by model selection according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.
The power supply of the negative pressure fan 230 and the motor 360 and the principle thereof will be clear to those skilled in the art and will not be described in detail herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)

1. The utility model provides a haze canopy falls in environmental protection for outdoor large-scale burning scene which characterized in that: including supporting component (100), remove haze subassembly (200) and fall haze subassembly (300), supporting component (100) is including shed roof (110), support (120), big-arch shelter membrane (130) and zip fastener (140), shed roof (110) are fixed the upper end of support (120), big-arch shelter membrane (130) are fixed shed roof (110) with the surface of support (120), zip fastener (140) are fixed on big-arch shelter membrane (130), it includes hollow post (210), negative-pressure air fan (230), crosses filter pulp (240), active carbon filter layer (250) and air filter screen (260) to remove haze subassembly (200), hollow post (210) are fixed on shed roof (110), negative-pressure air fan (230) are fixed in hollow post (210), it fixes to cross filter pulp (240) in hollow post (210), active carbon filter layer (250) are fixed in hollow post (210), the air filter screen (260) is fixed in the hollow column (210), the haze reducing assembly (300) comprises a first support plate (310), a sliding rod (320), a sliding sleeve (330), a water pipe (340), a threaded sleeve (350), a motor (360), a gear transmission part (370), a second support plate (380), a spray head (391), a hose (392) and a screw rod (393), the second support plate (380) is fixed on the side surface of the support (120), the first support plate (310) is also fixed on the side surface of the support (120), one end of the screw rod (393) rotates on the lower surface of the first support plate (310), the other end of the screw rod (393) rotates on the upper surface of the second support plate (380), the threaded sleeve (350) is in threaded sleeve on the screw rod (393), and the sliding rod (320) is fixed between the first support plates (310), the sliding sleeve (330) is sleeved on the sliding rod (320) in a sliding mode, the water pipe (340) is fixed between the sliding sleeve (330) and the threaded sleeve (350), the motor (360) is fixed on the upper surface of the second supporting plate (380), the screw rod (393) and the output shaft of the motor (360) are transmitted together through the gear transmission piece (370), the lower end of the hose (392) is fixed on the upper surface of the water pipe (340), and the spray head (391) is fixed on the lower surface of the water pipe (340).
2. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: the shed roof (110) comprises a shed roof body (111), a through hole (112) is formed in the shed roof body (111), and the hollow column (210) is fixed in the through hole (112) in a sealing mode.
3. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: the supporting assembly (100) further comprises a dust screen (150), and the dust screen (150) is arranged on the greenhouse film (130).
4. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: hollow post (210) are including hollow post body (211) and sound absorbing layer (212), hollow post body (211) are fixed in shed roof (110), sound absorbing layer (212) are fixed on the inner wall of hollow post body (211).
5. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: remove haze subassembly (200) and still include guide cover (220), the lower surface of guide cover (220) is fixed the upper surface of hollow post (210).
6. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: the motor (360) comprises a motor body (361) and a protective shell (362), the protective shell (362) is fixed on the upper surface of the second supporting plate (380), and the motor body (361) is fixed on the inner wall of the protective shell (362).
7. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: the gear transmission part (370) comprises a first bevel gear (371) and a second bevel gear (372), the first bevel gear (371) is fixed on the screw rod (393), the second bevel gear (372) is fixed on an output shaft of the motor (360), and the first bevel gear (371) and the second bevel gear (372) are meshed.
8. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: the second support plate (380) includes a second support plate body (381) and a sloped bar (382), the second support plate body (381) being fixed on a side surface of the bracket (120), the sloped bar (382) being fixed between a lower surface of the second support plate body (381) and the side surface of the bracket (120).
9. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: haze subassembly (300) falls still includes rotates piece (390), rotate piece (390) and fix respectively in first backup pad (310) and second backup pad (380), lead screw (393) are rotated in rotating piece (390).
10. The environment-friendly haze-reducing shed for the outdoor large-scale incineration site, according to claim 1, is characterized in that: the support assembly (100) further comprises a connecting plate (160), and the connecting plate (160) is fixed on the lower surface of the bracket (120).
CN202010514207.6A 2020-06-08 2020-06-08 A haze canopy falls in environmental protection for outdoor large-scale scene of burning Pending CN111701375A (en)

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Application Number Priority Date Filing Date Title
CN202010514207.6A CN111701375A (en) 2020-06-08 2020-06-08 A haze canopy falls in environmental protection for outdoor large-scale scene of burning

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CN202010514207.6A CN111701375A (en) 2020-06-08 2020-06-08 A haze canopy falls in environmental protection for outdoor large-scale scene of burning

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