CN110725184B

CN110725184B - Asphalt mixing, stirring and heating device and using method thereof

Info

Publication number: CN110725184B
Application number: CN201910912095.7A
Authority: CN
Inventors: 展利
Original assignee: Hebei Zhali Waterproof Machinery Equipment Co ltd
Current assignee: Hebei Zhali Waterproof Machinery Equipment Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2021-04-20
Anticipated expiration: 2039-09-25
Also published as: CN110725184A

Abstract

The utility model provides an asphalt mixing stirring heating device, is including the internal rabbling mechanism of sealed agitator tank and vertical and rotatory setting at the agitator tank, and the axis upper end of rabbling mechanism passes the top of the agitator tank and is rotatory by motor drive, and a plurality of openings that are used for throwing the material are predetermine at its top, and asphalt mixing stirring heating device is still including the flue gas filter mechanism that is arranged in filtering oily pitch in the flue gas, and flue gas filter mechanism bottom is linked together with one of them opening. The flue gas filtering mechanism comprises a feeding part and a filtering part which are arranged from bottom to top in sequence; a feeding port is arranged on the side wall of the feeding part, a feeding cover door is arranged at the feeding port, and the feeding cover door is rotated by a handle; the filtering part is provided with a drawer part with the bottom of a net structure, and a separable metal wire mesh layer is arranged in the filtering part. The invention can preliminarily filter the oily asphalt in the high-temperature flue gas of the stirring tank body and prepare for next gas purification.

Description

Asphalt mixing, stirring and heating device and using method thereof

Technical Field

The invention relates to the field of waterproof coiled material manufacturing, in particular to an asphalt mixing, stirring and heating device for an asphalt mixture used in the process of dip-coating a waterproof coiled material.

Background

The asphalt waterproof coiled material is a commonly used waterproof material, is a rolled flexible building material product for preventing water from leaking, is widely used in building walls, roofs, tunnels, highways, refuse landfills and the like, is used as a leakage-free connection between an engineering foundation and a building, and plays a vital role in the whole engineering. The asphalt waterproof coiled material is mainly prepared by dip-coating asphalt waterproof materials on a matrix. The asphalt waterproof material in the production material is usually prepared by adding a plurality of raw materials and heating and reacting in a reaction kettle, and in the reaction process, a large amount of smoke, such as a large amount of various organic waste gases, distilled asphalt and the like, is generated, and is unfavorable for the environment and the human health, so that the smoke needs to be treated.

The prior art does not lack various waste gas treatment mechanisms, but when the high-temperature flue gas containing the distilled asphalt is treated, the distilled asphalt is condensed when being cooled, so that excessive oily asphalt is inevitably adhered to the waste gas treatment mechanism to cause blockage along with the passage of time, and therefore, the distilled asphalt needs to be filtered before being connected with a special waste gas treatment mechanism to prepare for next gas purification.

Disclosure of Invention

The invention mainly aims to provide an asphalt mixing, stirring and heating device capable of filtering oily asphalt.

The technical scheme for solving the problems is realized as follows:

the utility model provides an asphalt mixing stirring heating device, including the internal rabbling mechanism of sealed agitator tank body and vertical and rotatory setting at the agitator tank, the axis upper end of rabbling mechanism passes the top of the agitator tank body and is rotatory by the motor drive who fixes at the agitator tank body top, the lateral wall dish of the agitator tank body is equipped with the heating pipe, the bottom of the agitator tank body is equipped with the discharge gate, a plurality of openings that are used for throwing the material are predetermine at its top, asphalt mixing stirring heating device is still including the flue gas filtering mechanism who is arranged in filtering oily pitch in the flue gas, flue gas filtering mechanism bottom is linked together with one of them opening, its top is linked together with exhaust duct.

The smoke filtering mechanism comprises a rectangular feeding part and a rectangular filtering part which are sequentially arranged from bottom to top, and inner cavities of the feeding part and the filtering part are mutually communicated to form a smoke channel; a feeding port is arranged on the side wall of the feeding part, a feeding cover door for sealing the feeding port is arranged at the feeding port, two ends of the top of the feeding cover door are hinged with the side wall of the feeding part through a rotating shaft fixedly connected with the feeding cover door, and the rotating shaft on one side is fixedly connected with a handle; the filter part is provided with a drawer part, the bottom of the drawer part is of a net structure, a separable metal wire mesh layer is further arranged in the drawer part, and the mesh number of the metal wire mesh layer is larger than that of the net structure at the bottom of the drawer part.

The top of the feeding part and/or the filtering part is provided with a contraction part, and the contraction part is in an inverted funnel shape which is inwards contracted along the top of the feeding part and/or the filtering part.

Wherein, set up a plurality of return mechanisms on flue gas filter mechanism's the lateral wall, return mechanism includes the protruding bar groove of locating flue gas filter mechanism's lateral wall and sets up the backward flow hole that is linked together with the flue gas passageway at bar inslot lateral wall.

The feeding cover door is of a folding structure and is formed by hinging an upper rectangular plate and a lower rectangular plate which are connected by edges.

The handle comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged to the rotating shaft and is perpendicular to the rotating shaft, the other end of the first connecting rod is hinged to one end of the second connecting rod and is perpendicular to the second connecting rod, a clamping rod is arranged at the free end of the second connecting rod and is perpendicular to the free end of the second connecting rod, a V-shaped clamping groove used for clamping the end portion of the clamping rod is formed in the side wall of the feeding portion, which is located on the same side of the handle, and the V-shaped clamping groove is arranged on the side wall of the.

The feeding cover door also comprises an additional cover door detachably hinged with the bottom end of the feeding cover door, and the additional cover door comprises a frame body, a left connecting shaft, a right connecting shaft, a left hinge, a right hinge and a plurality of torsion springs; the frame body is a rectangular plate, a rectangular through hole is formed in the frame body, the side edge of the upper end of the frame body is hinged with the side edge of the bottom end of the feeding cover door, and the lower end of the frame body is abutted against the lower edge of the feeding port when the frame body is used; the left connecting shaft and the right connecting shaft are vertically and symmetrically fixedly arranged on the left side and the right side of the through hole; the left hinge is a rectangular plate and is rotatably connected with the left connecting shaft, a plurality of torsional springs are sleeved on the left connecting shaft, one end of each torsional spring is fixedly connected with the left connecting shaft, and the other end of each torsional spring is fixedly connected with the inner surface of the left hinge; the right hinge is a rectangular plate which is symmetrically arranged with the left hinge, the right hinge is rotatably connected with the right connecting shaft, a plurality of torsional springs are sleeved on the right connecting shaft, one end of each torsional spring is fixedly connected with the right connecting shaft, the other end of each torsional spring is fixedly connected with the inner surface of the right hinge, and the opening can be sealed when the left hinge and the right hinge are aligned.

The stirring mechanism comprises a hollow center shaft and stirring blades spirally arranged on the center shaft, and a plurality of slots are formed in the stirring blades.

The use method of the asphalt mixing, stirring and heating device is characterized by comprising the following steps:

s1: opening a heating furnace communicated with the heating pipe, and heating the heat conducting oil in the heating pipe to ensure that the stirring tank body is preheated to 155-165 ℃;

s2: lifting a feeding cover door, feeding 1/3 parts of asphalt and all parts of softening oil from a feeding port, immediately closing the feeding cover door after feeding is finished, and stirring at a constant speed by using a stirring mechanism until the asphalt is dehydrated and reaches a flowing state;

s3: lifting the feeding cover door, feeding the residual 2/3 parts of asphalt from the feeding opening, immediately closing the feeding cover door after the feeding is finished, and uniformly stirring by using a stirring mechanism until the asphalt is dehydrated again and reaches a flowing state;

s4: mixing other additives for modification uniformly according to the parts to form an additive premix;

s5: lifting a feeding cover door, feeding the additive premix in the S4 from a feeding opening in multiple times and stirring at a constant speed by using a stirring mechanism;

s6: in the process of S1 to S5, whether the wire mesh layer of the drawer is clogged or not is checked at regular time, and if necessary, a new wire mesh layer is replaced.

The invention has the beneficial effects that:

by arranging the flue gas filtering mechanism, oily asphalt in the flue gas can be filtered in advance to prepare for next gas purification;

the materials can be recovered from multiple aspects by arranging the metal wire mesh layer, the contraction part and the backflow mechanism;

through setting up the folding handle of throwing material lid door and two segmentation hinge structure so that throw the material operation.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1: the invention has the overall structure schematic diagram;

FIG. 2: the invention is a schematic three-dimensional structure diagram of a flue gas filtering mechanism when a feeding cover door is closed;

FIG. 3: the invention discloses a three-dimensional structure schematic diagram of a smoke filtering mechanism when a feeding cover door is lifted;

FIG. 4: the invention is enlarged in the part A in FIG. 3;

FIG. 5: the invention is a drawer structure diagram;

FIG. 6: the structure of the stirring mechanism of the invention is schematically shown

FIG. 7: the embodiment of the invention provides a schematic view of the using state of an additional cover door;

FIG. 8: the structure schematic diagram of the additional cover door of the embodiment of the invention when being observed from the front;

FIG. 9: in the embodiment of the invention, when the additional cover door is observed from the back, the connection relation between the left hinge or the right hinge and the torsion spring is a schematic perspective view;

FIG. 10: in the second embodiment of the invention, the position relation between the baffle and the feeding cover door is shown in a normal state;

FIG. 11: the second embodiment of the invention is a schematic diagram of the position relationship between the baffle and the feeding cover door during feeding.

Description of the reference numerals

1 stirring tank

101 discharge hole

102 opening of the container

2 stirring mechanism

21 middle shaft

22 stirring blade

221 slit

3 flue gas filtering mechanism

31 filter part

32 feeding part

33 feeding cover door

331 rotating shaft

34 handle

341 first link

342 second connecting rod

343 clamp lever

35 feeding port

36 drawer part

361 wire mesh layer

37 backflow mechanism

371 strip groove

372 return flow hole

38V-shaped clamping groove

39 pinch portion

4 exhaust pipe

5 electric machine

6 additional cover door

601 frame body

602 left connecting shaft

603 right connecting shaft

604 left hinge

605 right hinge

606 torsion spring

7 baffle

8 telescoping unit

9 touching the switch.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

The first embodiment is as follows: referring to fig. 1, the asphalt mixing, stirring and heating device of the present invention includes a sealed stirring tank 1 and a vertical and rotating stirring mechanism 2 disposed in the stirring tank 1, wherein the upper end of a central shaft 21 of the stirring mechanism 2 passes through the top of the stirring tank 1 and is driven to rotate by a motor 5 fixed on the top of the stirring tank 1, a heating pipe (not shown) is disposed on an outer side wall of the stirring tank 1, heat conducting oil is disposed in the heating pipe, the heat conducting oil circulates between the heating pipe and a heating furnace to continuously heat the stirring tank 1, a discharge port 101 is disposed at the bottom of the stirring tank 1 for outputting a mixed asphalt mixture, a plurality of openings 102 for feeding are preset at the top of the stirring tank, an asphalt raw material and various additives for modifying the asphalt raw material can be respectively fed through different openings 102, and a flue gas filtering mechanism 3 for filtering oily asphalt in flue gas, the bottom of the smoke filtering mechanism 3 is communicated with one opening 102, the top of the smoke filtering mechanism is communicated with the exhaust pipeline 4, the exhaust pipeline 4 is connected with other waste gas treatment mechanisms to further treat other harmful gases, and the other openings 102 are sealed by sealing covers when materials are not fed, or the smoke filtering mechanism 3 can be arranged on each opening. In this embodiment, the flue gas filtering mechanism 3 is disposed on the opening for feeding the asphalt raw material.

Referring to fig. 2 to 5, the specific structure of the flue gas filtering mechanism 3 is as follows: the device comprises a rectangular feeding part 32 and a rectangular filtering part 31 which are arranged from bottom to top in sequence, wherein inner cavities of the feeding part 32 and the filtering part 31 are communicated with each other to form a flue gas channel; a feeding port 35 is arranged on the side wall of the feeding part 32, a feeding cover door 33 for sealing the feeding port 35 is arranged at the feeding port 35, two ends of the top of the feeding cover door 33 are hinged with the side wall of the feeding part 32 through a rotating shaft 331 fixedly connected with the feeding cover door, the rotating shaft 331 at one side is fixedly connected with a handle 34, and the rotating shaft 331 is rotated by the handle 34 to lift the feeding cover door 33 into the feeding port 35 so as to conveniently feed asphalt raw materials; the filter part 31 is provided with a drawer part 36, the bottom of the drawer part 36 is of a net structure, a separable wire mesh layer 361 is further arranged in the drawer part 36, and the mesh number of the wire mesh layer 361 is larger than that of the net structure at the bottom of the drawer part 36. When the high-temperature flue gas in the stirring tank body 1 rises to the position of the wire mesh layer 361 of the filter part 31 through the flue gas channel, the distilled asphalt in the high-temperature flue gas is condensed and drops into the stirring tank body 1 again when encountering the wire mesh layer 361 with lower temperature, and solid asphalt is adhered to the wire mesh layer 361 to block the meshes of the wire mesh layer 361 as time goes on, so that the discharge of the flue gas is not facilitated, and at the moment, the wire mesh layer 361 is taken out and cleaned separately.

The top parts of the feeding part 32 and the filtering part 31 are both provided with a contraction part 39, and the contraction part 39 is in an inverted funnel shape which is inwards contracted along the top parts of the feeding part 32 and the filtering part 31. When the high-temperature flue gas passes through the contraction part 39, because the flue gas channel is suddenly narrowed, part of the high-temperature flue gas is inevitably contacted with the side wall of the contraction part 39, the temperature of the side wall of the contraction part 39 is lower than that of the high-temperature flue gas, and therefore the partially distilled asphalt is condensed at the side wall and flows into the stirring tank body 1 along the side wall of the flue gas filtering mechanism 3 again.

The drawer 36 and the feeding cover door 33 of the smoke filtering mechanism 3 are not in an absolute sealing state, and there are gaps at the connection between the drawer 36 and the filtering part 31 and at the connection between the feeding cover door 33 and the feeding port 35, so that part of high-temperature smoke can emerge along the gaps, and the distilled asphalt therein can instantly condense after being cooled and flow down along the outer side wall of the smoke filtering mechanism 3, and in order to save materials and keep clean on site, a plurality of backflow mechanisms 37 are arranged on the outer side wall of the smoke filtering mechanism 3, and in this embodiment, the backflow mechanisms 37 are arranged at the following three positions: on the side wall below the drawer 36, below the hinge of the two rectangular panels immediately below the drop lid door 33 and at the lowermost end of the drop lid door 33. Referring to fig. 4, the backflow mechanism 37 includes a strip groove 371 protruding from the outer side wall of the flue gas filtering mechanism 3 and a backflow hole 372 disposed on the inner side wall of the strip groove 371 and communicating with the flue gas channel, and the asphalt flowing downward along the outer side wall is collected in the backflow groove 371, and flows back again through the backflow hole 372 and finally enters the agitator tank 1.

The feeding cover door 33 may be a single rectangular plate or a folding structure, and is formed by hinging an upper rectangular plate and a lower rectangular plate with connected edges. When the feeding cover door 33 is in a folding structure and is lifted inwards, the rectangular plate positioned below is in a natural sagging state, so that the operable space during feeding is enlarged, and feeding is facilitated.

Because a certain time is required for feeding, especially the proportion of the asphalt raw material in the mixture is large, the feeding time is longer, and the handle 34 is held while the feeding is impossible during single-person operation, so that in order to facilitate the feeding, the handle 34 is provided with a two-section type hinged structure, and the handle 34 can be clamped on the side wall of the feeding part 32, so that the feeding cover door 33 is kept in a lifted state, please refer to fig. 2 to 3, the concrete structure is as follows: the handle 34 comprises a first connecting rod 341 and a second connecting rod 342, one end of the first connecting rod 341 is hinged to the rotating shaft 331 and perpendicular to the rotating shaft 331, the other end of the first connecting rod 341 is hinged to one end of the second connecting rod 342 and perpendicular to the second connecting rod 342, a clamping rod 343 is arranged at the free end of the second connecting rod 342 and perpendicular to the free end, a V-shaped clamping groove 38 for clamping the end of the clamping rod 343 is arranged on the side wall of the feeding part 32 on the same side as the handle 34, and the V-shaped clamping groove 38 is convexly arranged on the side wall of the feeding part 32.

When the amount of the pre-input raw materials is large and the input time is long, the handle 34 is clamped at the V-shaped clamping groove 38, the input cover door 33 is lifted, so that the high-temperature flue gas is discharged from the input port 35 during input, in order to further reduce the discharge of the high-temperature flue gas during input, the input cover door 33 further comprises an additional cover door 6 detachably hinged with the bottom end thereof, please refer to fig. 7 to 9, wherein the specific mechanism of the additional cover door 6 is as follows: comprises a frame body 601, a left connecting shaft 602, a right connecting shaft 603, a left hinge 604, a right hinge 605 and a plurality of torsion springs 606. The frame body 601 is a rectangular plate, a rectangular through hole is formed in the frame body, the side edge of the upper end of the frame body is hinged to the side edge of the bottom end of the feeding cover door 33, and the lower end of the frame body abuts against the lower edge of the feeding port 35 in use. The left connecting shaft 602 and the right connecting shaft 602 are vertically and symmetrically fixed at the left side and the right side of the through opening. The left hinge 604 is a rectangular plate and is rotatably connected with the left connecting shaft 602, a plurality of torsion springs 606 are sleeved on the left connecting shaft 602, one end of each torsion spring 606 is fixedly connected with the left connecting shaft 602, and the other end of each torsion spring 606 is fixedly connected with the inner surface of the left hinge 604; the right hinge 605 is a rectangular plate symmetrically arranged with the left hinge 604 and is rotationally connected with the right connecting shaft 603, a plurality of torsion springs 606 are sleeved on the right connecting shaft 603, one end of each torsion spring 606 is fixedly connected with the right connecting shaft 603, the other end of each torsion spring 606 is fixedly connected with the inner surface of the right hinge 605, and the through holes can be sealed when the left hinge 604 and the right hinge 605 are aligned. When throwing the material, directly put in the raw materials on the normal lower left hinge 604 and the right hinge 605 of being in the same place, owing to receive the action of gravity of raw materials, left hinge 604 and right hinge 605 all overturn downwards make the raw materials fall into agitator tank body 1 in, each torsional spring 606 is compressed when overturning downwards, under the effect of torsional spring 606 elastic restoring force after the raw materials fall into, left hinge 604 and right hinge 605 are in the same place rapidly once more, realized the self-closing of additional flap door 6 promptly, so can furthest's reduction throw the discharge of high temperature flue gas when throwing the material. When the feeding is completed, the feeding cover door 33 is closed, and the additional cover door 6 can be removed and put aside for standby.

Referring to fig. 6, in order to make the mixing in the stirring tank 1 more uniform, the stirring mechanism 2 includes a hollow central shaft 21 and stirring blades 22 spirally disposed on the central shaft, and the stirring blades 22 are provided with a plurality of slits 221.

Example two: referring to fig. 10 to 11, the main difference between the second embodiment and the first embodiment is that in order to further reduce the discharge of high-temperature flue gas during feeding, a baffle 7 used in conjunction with a feeding cover door 33 is provided in this embodiment, one side of the baffle 7 is hinged to the lower end of a feeding port 35, and a telescopic unit 8 is connected to the bottom surface of the baffle 7, and the telescopic unit 8 can drive the baffle 7 to rotate around a hinged shaft. In a normal state, the baffle 7 is driven by the telescopic unit 8 to be in an inward inclined state, namely, the feeding part and the filtering part are communicated, and high-temperature flue gas can pass through a gap formed between the baffle and the inner side wall of the flue gas filtering mechanism 3. The feeding cover door 33 is rotated inwards, when the feeding cover door 33 is completely lifted, the feeding cover door 33 touches a touch switch 9 which is arranged on the inner side wall of the smoke filtering mechanism 3 and corresponds to the position of the feeding cover door, the touch switch 9 is connected with the input end of a controller (not shown in the figure), the output end of the controller is connected with the telescopic unit 8, when the feeding cover door 33 touches the touch switch 9, the touch switch 9 sends a first signal to the controller, meanwhile, the controller sends an action command to the telescopic unit 8, the telescopic unit 8 drives the baffle 7 to rotate to the horizontal position, namely, the baffle seals a channel above the feeding part 32 at the moment, the smoke is blocked from passing through, the raw material to be fed can be placed on the baffle 7 at the moment, then the feeding cover door 33 is rotated reversely to restore the normal feeding state, namely, the feeding port is closed, at the moment, the touch switch 9 loses the contact of the feeding cover door 33, the second signal is sent to the controller, the controller sends an action command to the telescopic unit 8 again, the telescopic unit 8 drives the baffle 7 to restore to a normal state, namely the baffle 7 inclines downwards and keeps up-down communication, the raw material on the baffle 7 slides into the stirring tank body 1 under the action of gravity, the action can be repeated under the condition of multiple feeding, and the mode can reduce the discharge of smoke to the maximum extent while feeding. The telescopic unit 8 can be a telescopic hydraulic cylinder. In this embodiment, the length of the rectangular plate above the folding lid door 33 is longer than below to enable the touch switch 9 to be touched. The smoke filtering mechanism 3 is located below the feeding port 35, and the structure thereof is vertical, different from the structure of the inward contraction in the first embodiment.

The asphalt mixture for dip coating is asphalt, softening oil and other powdered additive for altering the property of asphalt, and through heating and mixing in certain proportion, the asphalt mixing and heating apparatus of the present invention is used in combination, and the asphalt mixture compounding process includes the following steps:

s1: opening a heating furnace communicated with the heating pipe, and heating the heat conducting oil in the heating pipe to ensure that the stirring tank body 1 is preheated to 155-165 ℃;

s2: lifting the feeding cover door 33, feeding 1/3 parts of asphalt and all parts of softening oil from the feeding port 35, immediately closing the feeding cover door 33 after feeding, and stirring at constant speed by using a stirrer 2 until the asphalt is dehydrated and reaches a flowing state;

s3: lifting the feeding cover door 33, feeding the residual 2/3 parts of asphalt from the feeding port 35, immediately closing the feeding cover door 33 after the feeding is finished, and uniformly stirring by using the stirring mechanism 2 until the asphalt is dehydrated again and reaches a flowing state;

s5: lifting the feeding cover door 33, feeding the additive premix in the S4 from the feeding port 35 in multiple times and stirring at a constant speed by using the stirring mechanism 2;

s6: in the process from S1 to S5, whether the wire mesh layer 361 of the drawer is clogged or not is checked at regular time, and if necessary, the wire mesh layer 361 is replaced with a new one.

Because of the large difference between the amounts of asphalt and softening oil, 1/3 parts of asphalt and the total amount of softening oil are mixed in step S2, and the rest 2/3 parts of asphalt are mixed in, so that the asphalt and the softening oil are easier to mix uniformly.

The foregoing description is only of the preferred embodiments of the present invention, and it should be understood that the described embodiments are only a few, and not all, of the embodiments of the present invention. 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.

Claims

1. An asphalt mixing, stirring and heating device comprises a sealed stirring tank body and a vertical and rotary stirring mechanism arranged in the stirring tank body, wherein the upper end of a center shaft of the stirring mechanism penetrates through the top of the stirring tank body and is driven to rotate by a motor fixed on the top of the stirring tank body, a heating pipe is arranged on an outer side wall disc of the stirring tank body, a discharge hole is formed in the bottom of the stirring tank body, a plurality of openings for feeding are preset in the top of the stirring tank body, the asphalt mixing, stirring and heating device is characterized by further comprising a flue gas filtering mechanism for filtering oily asphalt in flue gas, the bottom of the flue gas filtering mechanism is communicated with one opening, and the top of the flue gas filtering mechanism is communicated with an exhaust pipeline;

the smoke filtering mechanism comprises a rectangular feeding part and a rectangular filtering part which are sequentially arranged from bottom to top, and inner cavities of the feeding part and the filtering part are mutually communicated to form a smoke channel; a feeding port is formed in the side wall of the feeding part, a feeding cover door used for sealing the feeding port is arranged at the feeding port, two ends of the top of the feeding cover door are hinged with the side wall of the feeding part through a rotating shaft fixedly connected with the feeding cover door, and the rotating shaft on one side is fixedly connected with a handle; the filtering part is provided with a drawer part, the bottom of the drawer part is of a net structure, a separable metal wire mesh layer is further arranged in the drawer part, and the mesh number of the metal wire mesh layer is larger than that of the net structure at the bottom of the drawer part.

2. The asphalt mixing, stirring and heating apparatus according to claim 1, wherein the top of the charging section and/or the filtering section is provided with a constriction, and the constriction is in the shape of an inverted funnel that inwardly constricts along the top of the charging section and/or the filtering section.

3. The asphalt mixing, stirring and heating device according to claim 1, wherein a plurality of backflow mechanisms are arranged on the outer side wall of the flue gas filtering mechanism, and each backflow mechanism comprises a strip-shaped groove which is convexly arranged on the outer side wall of the flue gas filtering mechanism and a backflow hole which is arranged on the inner side wall of the strip-shaped groove and communicated with the flue gas channel.

4. The asphalt mixing, stirring and heating apparatus according to claim 1, wherein the feeding cover door is of a folding structure formed by hinging an upper rectangular plate and a lower rectangular plate with connected edges.

5. The asphalt mixing, stirring and heating device according to claim 4, wherein the handle comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged to the rotating shaft and perpendicular to the rotating shaft, the other end of the first connecting rod is hinged to one end of the second connecting rod and perpendicular to the second connecting rod, a clamping rod is arranged at the free end of the second connecting rod perpendicular to the free end of the second connecting rod, a V-shaped clamping groove for clamping the end of the clamping rod is arranged on the side wall of the feeding portion on the same side as the handle, and the V-shaped clamping groove is protrudingly arranged on the side wall of the feeding portion.

6. The asphalt mixing, stirring and heating device according to claim 5, wherein the feeding cover door further comprises an additional cover door detachably hinged with the bottom end of the feeding cover door, and the additional cover door comprises a frame body, a left connecting shaft, a right connecting shaft, a left hinge, a right hinge and a plurality of torsion springs;

the frame body is a rectangular plate, a rectangular through hole is formed in the frame body, the side edge of the upper end of the frame body is hinged with the side edge of the bottom end of the feeding cover door, and the lower end of the frame body is abutted against the lower edge of the feeding port when the frame body is used;

the left connecting shaft and the right connecting shaft are vertically and symmetrically fixedly arranged on the left side and the right side of the through hole;

the left hinge is a rectangular plate and is rotatably connected with the left connecting shaft, a plurality of torsion springs are sleeved on the left connecting shaft, one end of each torsion spring is fixedly connected with the left connecting shaft, and the other end of each torsion spring is fixedly connected with the inner surface of the left hinge;

the right side hinge be with the rectangular plate that left side hinge symmetry set up, its with right side connecting axle rotates to be connected, the cover is equipped with a plurality of torsional springs on the connecting axle of the right side, the one end of each torsional spring with right side connecting axle fixed connection, the other end with right side hinge internal surface fixed connection, left side hinge with right side hinge when oppositing, can with the opening seals.

7. An asphalt mixing, stirring and heating apparatus according to any one of claims 1 to 6, wherein said stirring mechanism comprises said hollow central shaft and stirring blades spirally disposed on said central shaft, and each of said stirring blades is provided with a plurality of slits.

8. A method of using the asphalt mixing stirring and heating apparatus according to claim 1, comprising the steps of:

s2: lifting the feeding cover door, feeding 1/3 parts of asphalt and all the softening oil from the feeding opening, immediately closing the feeding cover door after feeding is finished, and stirring at a constant speed by using the stirring mechanism until the asphalt is dehydrated and reaches a flowing state;

s3: lifting the feeding cover door, feeding the residual 2/3 parts of asphalt from the feeding opening, immediately closing the feeding cover door after the feeding is finished, and uniformly stirring by using the stirring mechanism until the asphalt is dehydrated again and reaches a flowing state;

s5: lifting the feeding cover door, feeding the additive premix in the S4 from the feeding opening in multiple times, and stirring at a constant speed by using the stirring mechanism;

s6: in the process of S1 to S5, whether the wire mesh layer of the drawer is clogged or not is checked at regular time, and if necessary, the wire mesh layer is replaced with a new one.