CN111305002A - Indoor mixer for asphalt mixture - Google Patents
Indoor mixer for asphalt mixture Download PDFInfo
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- CN111305002A CN111305002A CN202010245097.8A CN202010245097A CN111305002A CN 111305002 A CN111305002 A CN 111305002A CN 202010245097 A CN202010245097 A CN 202010245097A CN 111305002 A CN111305002 A CN 111305002A
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- asphalt
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
- E01C19/1027—Mixing in a rotary receptacle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
- E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
- E01C19/1045—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers the mixture being discharged continuously
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1063—Controlling the operations
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
- E01C19/1072—Supplying or proportioning the ingredients the solid ingredients
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses an indoor mixer for asphalt mixture, comprising: the device comprises a rack, a raw material adding device, a mixture stirring device, an asphalt smoke collecting device and a comprehensive control panel. The frame provides a working platform for each accessory part of the mixer; the raw material adding device can be used for carrying out heat preservation storage and addition on raw materials; the mixture stirring device can perform synchronous reverse rotation stirring and automatic discharging of the stirring cylinder and the stirrer; the asphalt smoke absorption device can absorb and treat harmful gases such as asphalt smoke generated in the production process of the mixture. The comprehensive control panel is electrically connected with the raw material adding device and the mixture stirring device to comprehensively control the raw material adding device and the mixture stirring device, so that the whole process from raw material adding, mixture stirring to finished material pouring is controlled. The indoor asphalt mixture mixer can effectively improve the mixing quality of the mixture and obviously reduce the emission of asphalt smoke in the production process of the mixture.
Description
Technical Field
The invention belongs to the technical field of material stirring and mixing, and particularly relates to an indoor stirring device for an asphalt mixture.
Background
With the increasing number of asphalt concrete pavements on domestic highways, an indoor asphalt mixture mixer is widely applied in the technical field of construction and maintenance of asphalt concrete pavements, at present, in laboratories of scientific research, teaching, construction and supervision units of highway systems in China, two prominent problems exist in common indoor asphalt mixture mixers, firstly, a vertical mixing pot adopted has a structural defect, namely a certain vertical distance exists between a mixing paddle and the mixing pot, and in the process of mixing mixtures, the mixing paddle does not mix the mixtures at the bottom of the mixing pot in place, so that the mixtures at the bottom of the mixing pot are mixed unevenly, and when fine aggregates are in a large number at the bottom of the mixing pot, the phenomenon is particularly obvious. Secondly, in the design of indoor bituminous mixture amalgamator, the required pitch stirring degree of consistency of experimental design can not all be satisfied to current device, except the inhomogeneous problem of bottom of a boiler stirring that above-mentioned vertical agitated kettle brought, pitch viscidity is great in the agitated kettle, can also appear adhesion pot wall, stirs phenomenons such as inhomogeneous, influences the accuracy of survey material stability in the laboratory, mobility, saturation, clearance rate. Thirdly, the discharging gravity of the storage tank of the asphalt stirring device in the prior art can not be regulated or regulated to be within a fixed range, and the weighing precision is difficult to guarantee. Fourthly, the collection and treatment of waste gas are not considered in the design, and toxic and harmful gases such as asphalt smoke and the like generated in the production process of the asphalt mixture are not treated and are directly discharged into a room, so that the problem that the pollution to the body of an experiment operator is great is always solved.
In order to solve the technical problems of the indoor mixer for asphalt mixture, domestic experts and scholars also explore and research. In the aspect of improving the mixing uniformity of the asphalt mixture, CN207628333U discloses an asphalt mixture mixer, wherein a gear ring block is driven by a mixing motor to slide up and down, so as to drive a stirrer to move up and down in a mixing pot, thereby improving the comprehensiveness of the mixture stirring in the mixing pot. CN208711487U discloses a high-efficient pitch mixing mixer sets up two sets of agitators side by side to and install crushing cutter and puddler on the agitator, improve the stirring homogeneity. KR101371499B1 discloses a powder or granule mixer, which can be rotated reversely by a feeder to achieve a more uniform mixing effect. CN110013774A discloses a stirring structure of a double-shaft stirrer and a stirring method thereof, wherein the stirring structure is provided with double-shaft stirring paddles with opposite movement directions to promote uniform stirring. The stirrer cannot meet the requirement of high mixing uniformity of an indoor stirrer in a laboratory at present, and the defect of uneven stirring still exists at the pot bottom and the pot wall, so that the accuracy of measuring the performances such as material stability, fluidity, saturation, clearance rate and the like in the laboratory is influenced. In addition, in the aspect of asphalt smoke prevention and control of an indoor asphalt mixer of an asphalt mixture, no relevant research is published and reported at present, and a later person is urgently waited to research and overcome the problem.
In order to meet the requirements of experimental research and production construction, an indoor asphalt mixture mixer which is high in automation control precision, high in mixing uniformity and small in air pollution is urgently needed, the requirement of a laboratory on high accuracy is met, and the problems that the asphalt mixture at the bottom of a mixing pan cannot be mixed in place and is not uniform and the air pollution caused by asphalt smoke can be fundamentally solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an indoor asphalt mixture mixer which can fundamentally solve the problems of uneven mixing and air smoke pollution of asphalt caused by the fact that the asphalt mixture at the bottom of a mixing pot cannot be mixed in place.
The invention provides an indoor asphalt mixture mixer, which comprises a frame 1, a raw material adding device 2, a mixture stirring device 3, an asphalt smoke collecting device 4 and a comprehensive control panel 5, wherein the raw material adding device comprises a feeding device, a mixing device and a mixing device; the frame 1 provides a working platform for each accessory part of the mixer, the frame 1 is sequentially provided with the raw material adding device 2 and the mixture stirring device 3 from top to bottom, and the raw material adding device 2 can be used for performing heat preservation storage and addition of raw materials and is arranged at the upper part of the frame 1; the asphalt smoke absorption device 4 is embedded inside a discharge port of the mixture stirring device 3 and can absorb harmful gases such as asphalt smoke and the like generated in the production process of the mixture, and the comprehensive control panel 5 is respectively electrically connected with the raw material adding device 2 and the mixture stirring device 3 and comprehensively controls the raw material adding device and the mixture stirring device; the stirring cylinder 3-1 in the mixture stirring device 3 is transversely arranged and is respectively formed by a combination of a circular truncated cone, a cylinder and a circular truncated cone in the horizontal direction, namely, a shaft of a first circular truncated cone, a shaft of a middle cylinder and a shaft of a second circular truncated cone are connected into a horizontal line, wherein the first circular truncated cone is transversely arranged leftwards, the second circular truncated cone is transversely arranged rightwards, and the lower bottom surfaces of the two circular truncated cones are respectively butted and overlapped with circular surfaces on two sides of the transversely arranged cylinder to form the stirring cylinder 3-1.
Further, a feeding port 3-1-1 and a discharging port 3-1-2 of the stirring cylinder are respectively arranged at two ends of the stirring cylinder 3-1 along the horizontal direction, a sheet type stirring blade 3-1-3 is arranged on the inner wall of the side surface of the stirring cylinder 3-1, and the stirring cylinder 3-1 has a heat preservation function and is fixedly arranged on the rack 1 below the material storage tank 2-1.
Furthermore, the sheet type stirring blades 3-1-3 are sheet-shaped structures and are composed of three sections, the three sections corresponding to the circular truncated cone, the cylinder and the circular truncated cone of the stirring cylinder are respectively provided with one section, the first section forms an angle of-20 degrees with the horizontal line, the second section forms an angle of 10 degrees with the horizontal line, the third section forms an angle of 20 degrees with the horizontal line, and the sections are mutually connected end to end and are in a folded line shape. The installation position is as follows: the stirring device is uniformly and longitudinally (vertical to the radial direction) distributed along the circumferential direction of the inner wall of the stirring cylinder (3-1) at an equal radian of 60-120 degrees. It should be noted that: as shown in fig. 5, the first segment is at an angle of-20 ° to the horizontal, where the angle should be 200 ° or-20 ° in view of the directionality of the angle.
Further, the sheet type stirring blades 3-1-3 are uniformly and longitudinally arranged along the circumferential direction of the inner wall of the side surface of the stirring cylinder 3-1 at an equal radian of 90 degrees.
Further, the mixture stirring device 3 consists of a stirring cylinder 3-1, a stirring cylinder driving motor 3-2, a stirrer 3-3, a stirrer transmission motor 3-4 and a stirring cylinder vibrator 3-5; an output shaft of the stirring cylinder driving motor 3-2 drives a gear to drive the stirring cylinder 3-1 to rotate in the positive direction or the negative direction, the stirrer driving motor 3-4 drives a stirring shaft transversely arranged at the center of the stirring cylinder 3-1 to rotate, and the rotating speed is adjustable; the stirring cylinder 3-1 of the mixture stirring device 3 and the internal stirrer 3-3 thereof can synchronously rotate and stir in the reverse direction through the motor, wherein the stirring cylinder 3-1 also has the functions of forward rotation stirring and reverse rotation discharging.
Further, the stirrer 3-3 adopts a shaft type stirrer with branch-shaped stirring blades, each branch-shaped stirring blade is composed of 1 main stirring blade and 6 branch stirring blades, each branch stirring blade is divided into 3 groups, each group is provided with 2 stirring blades, every two stirring blades are symmetrically welded on two sides of the main stirring blade side by side, and the shape of each stirring blade is similar to a branch; the mounting position of the stirring paddle: the stirring shafts are arranged at equal intervals along the axial direction, and at the same position of the stirring shafts, the included angle between the same circumferential row of stirring paddles is 120 degrees, namely, three stirring paddles are arranged along the circumferential direction of the stirring shaft on each row of stirring paddles on a plane perpendicular to the stirring shafts; at different positions of the stirring shaft, two adjacent rows of stirring paddles are distributed on the cross section of the stirring shaft in a staggered way, and the included angles of every two adjacent rows of stirring paddles are 40-70 degrees, namely the included angles of every two adjacent rows of stirring paddles on a projection plane vertical to the stirring shaft are 40-70 degrees; main stirring leaf installation angle: the short side (width) of the main stirring blade and the cross section of the stirring shaft form 30 degrees and are obliquely arranged on the stirring shaft. It should be noted that: the stirring blade is rectangular, and the short side refers to the width of the stirring blade. The installation angle here is the angle between the main stirring blade and the stirring shaft, as shown in fig. 6.
Furthermore, at different positions of the stirring shaft, two adjacent rows of stirring paddles are distributed on the cross section of the stirring shaft in a staggered way, and the included angle between every two stirring paddles is 60 degrees.
Furthermore, the vibrators 3-5 of the mixing tank are arranged on the outer wall of the mixing tank in an attached mode according to the equal-area principle, and can work together with the stirrer and the mixing tank to achieve vibration mixing of the mixture.
Further, the raw material adding device 2 is composed of one or more storage tanks 2-1 which are formed in parallel, the bottom of the storage tank 2-1 is provided with a heat preservation material guide pipe 2-5, one end of the heat preservation material guide pipe is connected with the discharge port 2-1-2 of the storage tank, and the other end of the heat preservation material guide pipe is connected with the feed port 3-1-1 of the stirring cylinder; the bottom of the material storage tank is also provided with a material storage tank vibrator 2-2, a gravity sensor 2-3 and an electromagnetic valve 2-4, the raw materials can be stored and added in a heat preservation way, and the adding sequence, the quality and the time are controllable;
furthermore, a feeding port 3-1-1 of the stirring cylinder is a circular hole and is communicated with a discharge port 2-1-2 of the storage tank through a heat preservation material guide pipe 2-5. The discharging port 3-1-2 of the stirring cylinder is of a circular open structure, a sealing cover 3-1-4 of the discharging port of the stirring cylinder is installed, the sealing cover 3-1-4 of the discharging port of the stirring cylinder is a circular cover connected in a locking manner, a handle is installed on the outer side of the sealing cover, a smoke absorbing device 4 is embedded on the inner side of the sealing cover and is made of metal and heat insulating materials (mineral wool or composite silicate) in a composite mode, and the asphalt smoke absorbing device 4 is embedded on the inner side of the sealing cover 3-1-4 of the discharging port of the stirring cylinder.
Further, the flue gas absorption device 4 is made of asphalt smoke absorption materials (porous active substances with large specific surface area such as activated carbon) and is a cylinder, the diameter of the bottom surface of the flue gas absorption device is the same as the inner diameter of the sealing cover 3-1-4 of the discharge port of the stirring cylinder, and the flue gas absorption device is embedded on the inner side of the sealing cover and can absorb harmful gases such as asphalt smoke generated in the production process of the mixture.
Preferably, the storage tank 2-1 is a combination body formed by a cuboid and a pyramid with the same bottom, is made of metal and heat-insulating materials in a composite mode, and is installed on a steel platform of the rack 1. The feeding port 2-1-1 of the storage tank is arranged at the top of the storage tank 2-1, a detachable sealing cover connected by a buckle is adopted, and the discharge port 2-1-2 of the storage tank is arranged at the bottom of the storage tank 2-1 and is communicated with the feeding port 3-1-1 of the stirring cylinder through a heat preservation material guide pipe 2-5.
Preferably, the storage tank vibrator 2-2 is arranged on the outer wall of the storage tank 2-1, so that aggregate (particularly fine aggregate) is guaranteed to fall smoothly, and arch camber of the aggregate is prevented; specifically, the vibrator is installed between the gravity sensor and the electromagnetic valve.
Preferably, the gravity sensor 2-3 is installed at the bottom of the storage tank 2-1 and can work with the electromagnetic valve 2-4 in a coordinated mode, and accurate control over raw material addition is achieved.
Preferably, the electromagnetic valve 2-4 is arranged at the discharge port 2-1-2 of the storage tank and can work with the gravity sensor 2-3 in a coordinated manner, so that the raw material addition is accurately controlled.
Preferably, the heat-preservation material guide pipes 2-5 in the raw material adding system are hollow circular rings, are made of metal and heat-preservation materials (mineral wool or composite silicate) in a composite mode, have a heat-preservation function and can elastically stretch; one end of the stirring tank is connected with a discharge port 2-1-2 of the storage tank, and the other end of the stirring tank is connected with a feeding port 3-1-1 of the stirring tank.
Preferably, the heat insulation material is made of metal and heat insulation material in a composite mode, and the installation thickness is preferably 30-35 cm.
Preferably, the discharge port 3-1-2 of the stirring cylinder is of a circular open structure and is provided with a sealing cover 3-1-4 of the discharge port of the stirring cylinder.
Preferably, the sealing cover 3-1-4 at the discharge port of the stirring cylinder is a round cover connected in a locking manner, a handle is arranged on the outer side of the sealing cover, a smoke absorption device 4 is embedded on the inner side of the sealing cover and is made of metal and a heat insulation material in a composite manner, and the heat insulation material is mineral wool or composite silicate.
Preferably, a stirring cylinder driving motor 3-2 in the stirring system drives a stirring cylinder 3-1 to rotate through a gear, and the stirring cylinder can rotate in the positive direction and the negative direction.
Preferably, the stirrer transmission motor 3-4 drives a stirring shaft transversely arranged at the center of the stirring cylinder 3-1 to rotate, and the rotating speed is adjustable.
Preferably, the comprehensive control panel 5 can design a mixture mixing test scheme according to mixing process requirements, performs overall process control on links such as raw material addition, mixture mixing, finished product material pouring and the like by using a set program, and is electrically connected with the raw material adding device 2 and the mixture stirring device 3.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the traditional indoor asphalt mixture mixer, on one hand, in the mixing mode of the mixture, the mixing cylinder is horizontally placed, the inner wall of the mixing pot is provided with the mixing blades, and the mixing cylinder and the mixer can synchronously and reversely rotate, so that double mixing of the mixing cylinder and the mixer can be realized, the mixing uniformity is improved, and meanwhile, the vibrator is arranged on the outer wall of the mixing pot, so that the asphalt mixture can be prevented from being adhered to the pot wall; the problem that the asphalt mixture at the bottom of the mixing pot is not stirred in place and is not uniform due to the vertical distance between the stirrer and the bottom of the mixing pot in the traditional vertical mixing pot is fundamentally solved; on the other hand, in preventing air pollution, adopt and inlay dress pitch cigarette collection processing apparatus in the agitator tank inboard, can collect the processing to the production pitch cigarette of bituminous mixture mixing in-process in real time. Can effectively reduce the exhaust emission problem of an indoor mixer of the asphalt mixture, obviously improve the traditional aspects of the miasma and the unpleasant smell in the mixing chamber of the asphalt mixture, and is beneficial to the physical health of experimental operators.
2. The device has the advantages of simple structure, novel and reasonable design, realization of weighing and adding of raw materials in the storage tank, cooperative work of the electromagnetic valve and the gravity sensor of the storage tank, regulation and control of the discharge amount of the discharge port of the storage tank, higher metering precision, realization of accurate control of material addition, solving of the defects and shortcomings that the weighing precision is difficult to guarantee due to the fact that the gravity of the discharge in the prior art can not be regulated or regulated to be in a fixed range, realization of whole-process regulation of the discharge port, reduction of asphalt loss and errors caused by weighing and transferring, particularly suitability for the requirements of laboratories on high-precision asphalt test conditions, and great improvement of the metering precision of the asphalt stirring device.
3. The transversely arranged stirring cylinder is matched with a stirring device which can realize synchronous and reverse rotation of the stirring cylinder and the stirrer, so that the stirring uniformity is obviously improved. Wherein, through our continuous experiment, explore and obtained best stirring rake angle of setting and rotatory cooperation mode, promptly: at the same position of the stirring shaft, three stirring paddles are arranged on each row of the plane perpendicular to the stirring shaft along the circumferential direction of the stirring shaft, the included angle between the stirring paddles is 120 degrees, and at the different position of the stirring shaft, the included angle between every two adjacent rows of the stirring paddles on the projection plane perpendicular to the stirring shaft is 40-70 degrees, preferably 60 degrees. When the rotation direction of the stirring cylinder is opposite to that of the stirrer, the asphalt at the central position of the stirring cylinder has forward rotation speed under the action of the rotation force of the stirring shaft, the asphalt close to the inner wall of the stirring cylinder has reverse rotation speed under the action of the rotation force of the stirring paddle of the stirring cylinder blades, and the asphalt continuously collides in the stirring cylinder under the positive and negative acting forces, so that the asphalt can be fully mixed and uniformly stirred, and the asphalt attached to the inner wall of the stirring cylinder can be promoted to be separated from the inner wall to participate in mixing and stirring under the action of impact. It is better than the effect of stirring by using any one of the above modes singly.
4. The stirrer is designed in such a way that the included angle formed by two adjacent rows of stirring paddles perpendicular to the projection plane of the stirring shaft at different positions of the stirring shaft is 40-70 degrees, preferably 60 degrees, and is a numerical range obtained by long-term groping tests by researchers of subject groups, the numerical range is more compliant with the flowing direction of asphalt materials, the stirring uniformity can be improved, the material flowability can be accelerated, the material accumulation cannot be caused, and the stirring efficiency is improved. When the included angle formed by the two adjacent rows of stirring paddles perpendicular to the projection plane of the stirring shaft is less than 40 degrees or more than 70 degrees, the two rows of stirring paddles are easy to cause material accumulation, the flowability of the material is influenced, and the phenomenon of uneven stirring is further caused.
5. The invention firstly creates a sheet type stirring blade on the inner wall of the stirring cylinder, which is composed of three sections, wherein the three sections corresponding to the circular truncated cone, the cylinder and the circular truncated cone of the stirring cylinder are respectively provided with one section, the first section forms an angle of-20 degrees with the horizontal line, the second section forms an angle of 10 degrees with the horizontal line, the third section forms an angle of 20 degrees with the horizontal line, and the sections are mutually connected end to end and are in a fold line shape. The installation position is as follows: the stirring device is uniformly and longitudinally (vertical to the radial direction) distributed along the circumferential direction of the inner wall of the stirring cylinder 3-1 at an equal radian of 60-120 degrees. . According to the invention, the inclination angle of the blades is ingeniously utilized to enable the mixture to slide inwards when the stirring cylinder rotates in the positive direction and slide outwards when the stirring cylinder rotates in the negative direction, so that the functions of stirring in the positive direction and discharging in the negative direction of the stirring cylinder are achieved.
6. The sheet type stirring blades on the stirring cylinder are distributed on the inner wall of the side surface of the stirring cylinder along the circumferential direction of the stirring cylinder at equal radian of 60-120 degrees, preferably 90 degrees, and have the function of reverse discharging, and can play a role in stirring a mixture in the forward rotation process of a stirring pot.
7. The invention solves the problem that the arching of aggregates is not smooth frequently because fine aggregates are introduced into the storage tank in the prior art, adopts the method of installing the vibrator on the outer wall of the storage tank, can ensure that the aggregates (particularly the fine aggregates) fall smoothly, and prevent the aggregates from arching, which is also an innovative structure different from the storage tank in the prior art, and particularly, the vibrator is arranged between the gravity sensor and the electromagnetic valve.
8. Through long-term scientific research and teaching activities, the stirrer disclosed by the invention is arranged in a staggered manner by adopting branch-shaped stirring paddles and annular shafts, and branch stirring blades on the branch-shaped stirring paddles are symmetrically welded to two sides of a main stirring blade in parallel in sequence and are similar to branches, so that the stirring efficiency is improved to the maximum extent, and the stirring uniformity is improved; more showing, the stirring rake slope installation is 30 with the (mixing) shaft, and this angle setting plays the effect of stirring in coordination with the two double-phase crisscross certain angle settings of agitator, and in addition the synchronous reverse motion of agitator jar and agitator also is in order to prevent further that the material from piling up in the agitator jar, has eliminated the dead angle, and the setting of this angle is the best cooperation angle that we often tested constantly for a long time and reachs.
9. The mixing machine is provided with the heat-preservation material guide pipe which is made of metal and heat-preservation material, the heat-preservation material is preferably mineral wool or composite silicate, and the heat loss of the raw materials can be reduced in the raw material adding process of the heat-preservation material guide pipe.
Drawings
FIG. 1 is a front view of a mixer;
FIG. 2 is a side view of the mixer;
FIG. 3 is a schematic view of the steering of a mixing cylinder and a mixer of the mixer and the installation angle between two adjacent rows of mixing paddles;
FIG. 4 is a schematic view of the batch inlet of the mixing tank of the mixer;
FIG. 5 is a schematic view of an installation angle of a sheet type stirring blade of a stirring cylinder corresponding to the section of the stirrer 1-1;
FIG. 6 is a schematic view of the installation angle of the stirring paddle of the stirrer of the mixer.
Description of reference numerals: 1-frame, 2-raw material adding device, 2-1-material storage tank, 2-1-material storage tank feeding port, 2-1-2-material storage tank discharging port, 2-material storage tank vibrator, 2-3-gravity sensor, 2-4-electromagnetic valve, 2-5-heat preservation material guide pipe, 3-mixture stirring device and 3-1-stirring cylinder, 3-1-stirring cylinder feeding port, 3-1-2-stirring cylinder discharging port, 3-1-3-sheet type stirring blades, 3-1-4-stirring cylinder discharging port sealing cover, 3-2-stirring cylinder driving motor, 3-stirrer, 3-4-stirrer driving motor, 3-5-stirring cylinder vibrator, 4-asphalt smoke absorbing device and 5-comprehensive control panel.
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.
Referring to fig. 1-6, the working principle of the indoor mixer for asphalt mixture of the present invention is as follows:
(1) when the indoor asphalt mixture mixer is used, a power supply is firstly switched on, then the comprehensive control panel is switched on, the design of a mixture mixing test scheme is carried out according to a mixture mixing process, the comprehensive control panel can comprehensively control the raw material adding device and the mixture mixing device, and the whole process control from raw material adding, mixture mixing to finished material pouring is realized.
(2) Before the test, opening a feed port of a storage tank, respectively adding the prepared liquid asphalt and the dried aggregate into the storage tank, ensuring that the actual addition amount is slightly more than the use amount of the test, immediately closing the feed port of the storage tank, and performing heat preservation storage on the raw materials because the storage tank is made of a heat preservation material (mineral wool or composite silicate) and a metal material in a composite manner; the electromagnetic valve and the gravity sensor which are arranged on the storage tank can work cooperatively to regulate and control the discharge amount of the discharge port, and the weighing precision is high, so that the raw material addition is accurately controlled; the vibrator of storage tank bottom outside installation can ensure aggregate (especially fine aggregate) smooth and easy whereabouts through applying the vibrational force to the storage tank, prevents that the aggregate from arching. The addition sequence, the addition quality and the addition time of the raw materials can be comprehensively controlled by setting programs through the comprehensive control panel.
(3) A stirring cylinder driving motor in the mixture stirring system can drive the stirring cylinder to rotate through a gear, and the stirring cylinder can also rotate in the positive direction and the negative direction; the stirrer transmission motor drives the stirring shaft to rotate, and the rotating speed is adjustable; can make mixture agitating unit's a mixing bowl and the synchronous contrarotation stirring of its inside agitator through two motors, simultaneously, the vibrator that the mixing bowl was equipped with can be in coordination with mixing system work, realizes the vibration + the two-way synchronous reversal stirring of mixture, improves the quality of mixing of mixture, and wherein the mixing bowl still has corotation stirring, the function of reversal ejection of compact.
(4) The experiment is started through the comprehensive control panel, the raw material adding device automatically feeds materials into the stirring cylinder according to a set program, the stirring cylinder and the stirrer synchronously and reversely stir the mixture, and the stirring pot automatically and reversely discharges materials after the stirring is finished.
(5) The asphalt smoke absorbing device is embedded inside a sealing cover at the discharge port of the mixing tank, and can absorb harmful gases such as asphalt smoke generated in the production process of the mixture. The asphalt smoke adsorbing material (porous active material with large specific surface area such as active carbon) in the smoke absorbing device can be replaced regularly.
Example 1
An indoor asphalt mixture mixer comprises a frame 1, a raw material adding device 2, a mixture stirring device 3, an asphalt smoke collecting device 4 and a comprehensive control panel 5; the frame 1 provides a working platform for each accessory part of the mixer, the frame 1 is sequentially provided with the raw material adding device 2 and the mixture stirring device 3 from top to bottom, and the raw material adding device 2 can be used for performing heat preservation storage and addition of raw materials and is arranged at the upper part of the frame 1; the asphalt smoke absorbing device 4 is embedded inside a discharge port of the mixture stirring device 3, and the comprehensive control panel 5 is respectively electrically connected with the raw material adding device 2 and the mixture stirring device 3 to comprehensively control the raw material adding device and the mixture stirring device; the stirring cylinder 3-1 in the mixture stirring device 3 is transversely arranged and is respectively formed by a combination of a circular truncated cone, a cylinder and a circular truncated cone in the horizontal direction, namely, a shaft of a first circular truncated cone, a shaft of a middle cylinder and a shaft of a second circular truncated cone are connected into a horizontal line, wherein the first circular truncated cone is transversely arranged leftwards, the second circular truncated cone is transversely arranged rightwards, and the lower bottom surfaces of the two circular truncated cones are respectively butted and overlapped with circular surfaces on two sides of the transversely arranged cylinder to form the stirring cylinder 3-1. The stirring cylinder 3-1 is provided with a stirring cylinder feeding port 3-1-1 and a stirring cylinder discharging port 3-1-2 at two ends along the horizontal direction, the inner wall of the side surface of the stirring cylinder 3-1 is provided with a sheet type stirring blade 3-1-3, and the stirring cylinder 3-1 has a heat preservation function and is fixedly arranged on the rack 1 below the storage tank 2-1. The sheet type stirring blades 3-1-3 are of sheet structures and are composed of three sections, the three sections corresponding to the circular truncated cone, the cylinder and the circular truncated cone of the stirring cylinder are respectively provided with one section, the first section forms an angle of-20 degrees with the horizontal line, the second section forms an angle of 10 degrees with the horizontal line, the third section forms an angle of 20 degrees with the horizontal line, and the sections are mutually connected end to end and are in a fold line shape. The installation position is as follows: the stirring device is uniformly and longitudinally (vertical to the radial direction) arranged along the circumferential direction of the inner wall of the stirring cylinder (3-1) at equal radian and 90 degrees. The mixture stirring device 3 consists of a stirring cylinder 3-1, a stirring cylinder driving motor 3-2, a stirrer 3-3, a stirrer transmission motor 3-4 and a stirring pot vibrator 3-5; an output shaft of the stirring cylinder driving motor 3-2 drives a gear to drive the stirring cylinder 3-1 to rotate in the positive direction or the negative direction, the stirrer driving motor 3-4 drives a stirring shaft transversely arranged at the center of the stirring cylinder 3-1 to rotate, and the rotating speed is adjustable; the stirring cylinder 3-1 of the mixture stirring device 3 and the internal stirrer 3-3 thereof can synchronously rotate reversely for stirring through the motor. The stirrer 3-3 adopts a shaft type stirrer with branch-shaped stirring paddles, each branch-shaped stirring paddle consists of 1 main stirring blade and 6 branch stirring blades, the branch stirring blades are divided into 3 groups, and the branch stirring blades are symmetrically welded on two sides of each main stirring blade in pairs in parallel and in sequence and are shaped like branches; the mounting position of the stirring paddle: the stirring shafts are arranged at equal intervals along the axial direction, and at the same position of the stirring shafts, the included angle between the same circumferential row of stirring paddles is 120 degrees, namely, three stirring paddles are arranged along the circumferential direction of the stirring shaft on each row of stirring paddles on a plane perpendicular to the stirring shafts; at different positions of the stirring shaft, two adjacent rows of stirring paddles are distributed on the cross section of the stirring shaft in a staggered way, and the included angles of the two rows of stirring paddles are 60 degrees, namely the included angles of the two rows of stirring paddles on a projection plane vertical to the stirring shaft are 60 degrees; main stirring leaf installation angle: the short side (width) of the main stirring blade and the cross section of the stirring shaft form 30 degrees and are obliquely arranged on the stirring shaft. And the stirring cylinder vibrators 3-5 are arranged on the outer wall of the stirring cylinder in an attached manner according to the equal-area principle. The raw material adding device 2 consists of one or more storage tanks 2-1 which are formed in parallel, the bottom of the storage tank 2-1 is provided with a heat-preservation material guide pipe 2-5, one end of the heat-preservation material guide pipe is connected with the discharge port 2-1-2 of the storage tank, and the other end of the heat-preservation material guide pipe is connected with the feeding port 3-1-1 of the stirring cylinder; the feeding port 3-1-1 of the stirring cylinder is a circular hole and is communicated with the discharge port 2-1-2 of the storage tank through a heat preservation material guide pipe 2-5. The bottom of the material storage tank is also provided with a material storage tank vibrator 2-2, a gravity sensor 2-3 and an electromagnetic valve 2-4; the feeding port 3-1-1 of the stirring cylinder is a circular hole and is communicated with the discharge port 2-1-2 of the storage tank through a heat preservation material guide pipe 2-5. The mixing tank discharge port 3-1-2 is of a circular open structure and is provided with a mixing tank discharge port sealing cover 3-1-4, the mixing tank discharge port sealing cover 3-1-4 is a circular cover connected in a locking manner, a handle is arranged on the outer side of the mixing tank discharge port sealing cover, a smoke absorption device 4 is embedded on the inner side of the mixing tank discharge port sealing cover and is made of metal and heat insulation materials (mineral wool or composite silicate) in a composite mode. The flue gas absorption device 4 is made of asphalt smoke absorption materials (porous active substances with large specific surface area such as active carbon) and is a cylinder, the diameter of the bottom surface of the cylinder is the same as the inner diameter of the sealing cover 3-1-4 of the discharge port of the stirring cylinder, and the cylinder is embedded on the inner side of the sealing cover.
Experiment one is the influence of the improved mixer and BH-20 type asphalt mixture mixer of the invention on various performance parameters of different RAP old material mixing amount AC-25C thermal regeneration mixture
The method comprises the following steps: according to different mixing amounts of old RAP materials AC-25C hot recycling mixtures, an improved mixer in the embodiment 1 and a BH-20 type asphalt mixer (a comparison example 1) are respectively adopted to prepare asphalt mixtures, Marshall test pieces are formed, and volume parameters and mechanical property indexes of the mixtures are further measured. The results are shown in Table 1.
TABLE 1 different mixing volume parameters of different RAP old material mixing amount AC-25C thermal regeneration mixture
According to different RAP old material mixing amounts of AC-25C hot recycling mixtures, an improved mixer and a BH-20 type asphalt mixture mixer (comparative example 1) in the embodiment 1 of the invention are respectively adopted to prepare asphalt mixtures and form test pieces, a freeze-thaw splitting experiment, a rutting experiment and a low-temperature trabecular bending experiment are further developed, and the experiment results are summarized in a table 2.
TABLE 2 old RAP blending quantity AC-25C thermal regeneration mixture performance for different mixers
The experimental results are as follows: compared with the conventional mixing process, the AC-25C thermal regeneration mixture produced by the mixing machine provided by the invention is better in volume parameter and road performance. And for the hot recycling mixed material with large mixing amount of the old RAP material, the improved mixing process of the mixer has more obvious advantages.
Experiment two effects of the improved mixer and the BH-20 type asphalt mixture mixer of the invention on various performance parameters of another AC-25C heat regeneration mixture
For the AC-25C hot recycling mixture, an improved mixer in the embodiment 1 and a BH-20 type asphalt mixer (a comparative example 1) are respectively adopted to prepare an asphalt mixture, a Marshall test piece is formed, and the volume parameter and the mechanical property index of the mixture are measured. The results are shown in Table 3.
TABLE 3 volume parameters of different mixers of AC-25C hot mix
Further, the modified mixer of example 1 and the BH-20 asphalt mixer (comparative example 1) of the present invention were used to mix and form test pieces for AC-25C hot recycled mixtures, respectively, and a freeze-thaw splitting experiment, a rutting experiment, and a low-temperature bending experiment were performed, and the experimental results are summarized in table 4.
TABLE 4 road Properties of AC-25C thermal regeneration mixture for different mixers
As can be seen from Table 4, the TSR of the AC-25C hot mix was increased by 9.9% using the modified mixer of example 1 compared to the conventional mixer of comparative example 1; the dynamic stability is increased by 11.6 percent; the maximum bending strain is increased by 10.4 percent; the critical value of the bending strain energy density is increased by 29.1 percent.
In conclusion, compared with the conventional mixer, the AC-25C heat regeneration mixture produced by the improved mixer is better in volume parameter and road performance.
Experimental three different stirrer stirring paddle structure optimization layout analysis
The method comprises the following steps: the improved mixer disclosed by the invention is used for carrying out an optimization experiment on the AC-25C heat regeneration mixture, the mixing uniformity is evaluated by using the scattering loss rate of Kentuckberg at 5 ℃, and the influence of the structural design of stirring paddles of different mixers on the mixture uniformity is compared.
Example 1
An indoor mixer for asphalt mixture is composed of two rows of stirring paddles which form an included angle of 60 deg. on the vertical projection plane.
Experimental example 2
An indoor mixer for asphalt mixture is similar to that of example 1, and only two adjacent rows of mixing paddles are correspondingly replaced to form an included angle of 30 degrees on a vertical projection plane.
Experimental example 3
An indoor mixer for asphalt mixture is similar to that of example 1, and only two adjacent rows of mixing paddles are correspondingly replaced to form an included angle of 40 degrees on a vertical projection plane.
Experimental example 4
An indoor mixer for asphalt mixture is similar to that of example 1, and only two adjacent rows of mixing paddles are correspondingly replaced to form an included angle of 50 degrees on a vertical projection plane.
Experimental example 5
An indoor mixer for asphalt mixture is similar to that in example 1, only two adjacent rows of mixing paddles are correspondingly replaced to form an included angle of 70 degrees on a vertical projection plane.
Experimental example 6
An indoor mixer for asphalt mixture is similar to that of example 1, and only two adjacent rows of mixing paddles are correspondingly replaced to form an included angle of 80 degrees on a vertical projection plane.
TABLE 5 Effect of different stirrer-paddle included angles on Kentuckberg fly-off loss of asphalt mix
The experimental results are as follows: experiments show that the stirring uniformity of the mixture is influenced by the included angle of vertical projections of two stirring paddles in two rows of the stirrer, and the stirring uniformity performance is better when the included angle is 60 degrees on the vertical projections of two adjacent rows of the stirring blades in the embodiment 1.
Experimental four-different mixing pot stirring blade structure optimization layout analysis
The method comprises the following steps: the improved mixer disclosed by the invention is used for carrying out an optimization experiment on the AC-25C heat regeneration mixture, the mixing uniformity is evaluated by using the scattering loss rate of Kentuckberg at 5 ℃, and the influence of the structural design of the mixing blade of the mixing cylinder on the mixture uniformity is compared.
Example 1
An indoor mixer for asphalt mixture is composed of a mixing drum with mixing blades radially arranged on its inner surface at 90 deg. radian.
Experimental example 7
An indoor mixer for asphalt mixture is similar to that in embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 60 degrees.
Experimental example 8
An indoor mixer for asphalt mixture is similar to that in embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 70 degrees.
Experimental example 9
An indoor mixer for asphalt mixture is similar to that in embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 80 degrees.
Experimental example 10
An indoor mixer for asphalt mixture is similar to that in embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 100 degrees.
Experimental example 11
An indoor mixer for asphalt mixture is similar to that in the embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 110 degrees.
Experimental example 12
An indoor mixer for asphalt mixture is similar to that in embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 120 degrees.
Experimental example 13
An indoor mixer for asphalt mixture is similar to that in embodiment 1, and only the mixing blades of the corresponding replacement mixing tank are distributed on the inner wall of the mixing tank along the radial direction of the mixing tank with equal radian of 130 degrees.
TABLE 6 influence of the mixing blade angles of the different mixing pots on the Kentucky scattering loss of asphalt mixture
The experimental results are as follows: the radian of the stirring blades distributed along the inner wall of the stirring cylinder influences the stirring uniformity of the mixture, and experiments show that the stirring uniformity is better when the stirring blades of the stirring cylinder are distributed on the inner wall of the stirring cylinder along the radial equal radian of 90 degrees of the stirring cylinder in the embodiment 1.
Experiment five: the mixing cylinder and the stirrer synchronously rotate in reverse directions, and influence of the pot wall vibrator on mixing uniformity is cooperated
The method comprises the following steps: the improved mixer disclosed by the invention is used for carrying out an optimization experiment on the AC-25C heat regeneration mixture, the mixing uniformity is evaluated by using the scattering loss rate of Kentuckberg at 5 ℃, and the influence of a mixing cylinder and a mixer on the mixing uniformity is compared with the influence of a pot wall vibrator on synchronous reverse rotation.
Example 1
An indoor mixer for asphalt mixture is composed of a mixer with vibrator and a stirring cylinder rotating in opposite direction.
Experimental example 14
An indoor mixer for asphalt mixture is similar to that in example 1, except that the mixer is replaced by a corresponding mixer, and the mixer rotates synchronously and in the same direction and is provided with a vibrator.
Experimental example 15
An indoor mixer for asphalt mixture was constructed as in example 1 except that the mixer was replaced with a corresponding mixer and the mixer was rotated in the same direction and in synchronism with each other without a vibrator.
Experimental example 16
An indoor mixer for asphalt mixture was constructed as in example 1 except that the mixer was replaced with a corresponding mixer and the mixer was rotated in the opposite direction in synchronism with each other without a vibrator.
TABLE 7 Effect of mixing bowl and stirrer rotation settings on Kentuckberg fly-off loss of asphalt mix
| Experimental group | Example 1 | Experimental example 14 | Experimental example 15 | Experimental example 16 |
| Flying loss rate at 5% | 6.3 | 9.5 | 12.8 | 9.0 |
The experimental results are as follows: experiments show that the mixing cylinder and the stirrer rotate synchronously in the opposite direction in the embodiment 1 of the invention, and the mixing uniformity is better when the pot wall vibrator is cooperated to stir the mixed materials.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An indoor mixer for asphalt mixture, comprising: the device comprises a rack (1), a raw material adding device (2), a mixture stirring device (3), an asphalt smoke collecting device (4) and a comprehensive control panel (5); the machine frame (1) provides a working platform for each accessory part of a mixer, the machine frame (1) is sequentially provided with the raw material adding device (2) and the mixture stirring device (3) from top to bottom, the asphalt smoke absorbing device (4) is embedded inside a discharge hole of the mixture stirring device (3), and the comprehensive control panel (5) is electrically connected with the raw material adding device (2) and the mixture stirring device (3) respectively to comprehensively control the raw material adding device and the mixture stirring device; the stirring cylinder (3-1) in the mixture stirring device (3) is transversely arranged and is respectively formed by a combination of a circular table, a cylinder and a circular table in the horizontal direction, namely, a shaft of a first circular table, a shaft of a middle cylinder and a shaft of a second circular table are connected into a horizontal line, wherein the first circular table is transversely arranged leftwards, the second circular table is transversely arranged rightwards, and the lower bottom surfaces of the two circular tables are respectively butted and coincided with circular surfaces on two sides of the transversely arranged cylinder to form the stirring cylinder (3-1).
2. An indoor mixer for asphalt mixtures according to claim 1, wherein the mixing cylinder (3-1) is provided with a mixing cylinder feed port (3-1-1) and a mixing cylinder discharge port (3-1-2) at two ends in the horizontal direction, the inner wall of the side surface of the mixing cylinder (3-1) is provided with a sheet type mixing blade (3-1-3), and the mixing cylinder (3-1) has a heat preservation function and is fixedly arranged on the frame (1) at a position below the storage tank (2-1).
3. An indoor mixer for asphalt mixtures according to claim 2, wherein said lamellar stirring blades (3-1-3) are of lamellar structure and are composed of three segments, the three segments corresponding to the circular truncated cone + cylinder + circular truncated cone of the mixing bowl are respectively provided with a first segment at an angle of-20 ° to the horizontal, a second segment at an angle of 10 ° to the horizontal, a third segment at an angle of 20 ° to the horizontal, and the segments are connected end to end with each other and are in a zigzag shape; the installation position is as follows: the stirring device is uniformly and longitudinally arranged along the circumferential direction of the inner wall of the stirring cylinder (3-1) at an equal radian of 60-120 degrees, namely, the stirring device is vertically arranged in the radial direction.
4. An indoor mixer for asphalt mixtures according to claim 3, characterized in that the said stirring blades (3-1-3) are uniformly and longitudinally arranged along the inner wall of the side of the said stirring cylinder (3-1) in circumferential direction at 90 ° with equal radian.
5. An indoor asphalt mixture mixer according to claim 1, wherein the mixture stirring device (3) is composed of a stirring cylinder (3-1), a stirring cylinder driving motor (3-2), a stirrer (3-3), a stirrer transmission motor (3-4) and a stirring cylinder vibrator (3-5); an output shaft of the stirring cylinder driving motor (3-2) drives a gear to drive the stirring cylinder (3-1) to rotate in the positive direction or the negative direction, the stirrer transmission motor (3-4) drives a stirring shaft transversely arranged at the center of the stirring cylinder (3-1) to rotate, and the rotating speed is adjustable; the stirring cylinder (3-1) of the mixture stirring device (3) and the internal stirrer (3-3) thereof can synchronously rotate and stir in the reverse direction through the motor, wherein the stirring cylinder (3-1) also has the functions of forward rotation stirring and reverse rotation discharging; and the vibrators (3-5) of the mixing tank are arranged on the outer wall of the mixing tank in an attached mode according to the equal-area principle, and work together with the stirrer and the mixing tank to realize the vibration mixing of the mixture.
6. An indoor asphalt mixture mixer according to claim 4, wherein said stirrers (3-3) are shaft stirrers with branch-shaped stirring blades, each branch-shaped stirring blade is composed of 1 main stirring blade and 6 branch stirring blades, each branch stirring blade is divided into 3 groups of 2, each group is symmetrically welded on two sides of the main stirring blade in pairs in parallel, and the branch stirring blades are similar to branches; the mounting position of the stirring paddle: the stirring shafts are arranged at equal intervals along the axial direction, and at the same position of the stirring shafts, the included angle between the same circumferential row of stirring paddles is 120 degrees, namely, three stirring paddles are arranged along the circumferential direction of the stirring shaft on each row of stirring paddles on a plane perpendicular to the stirring shafts; at different positions of the stirring shaft, two adjacent rows of stirring paddles are distributed on the cross section of the stirring shaft in a staggered way, and the included angles of every two adjacent rows of stirring paddles are 40-70 degrees, namely the included angles of every two adjacent rows of stirring paddles on a projection plane vertical to the stirring shaft are 40-70 degrees; the stirring leaf is the rectangle, and the minor face is its width, main stirring leaf installation angle: the short side of the main stirring blade and the transverse section of the stirring shaft are 30 degrees.
7. An indoor mixer for asphalt mixtures according to claim 6, wherein two adjacent rows of paddles at different positions of the mixing shaft are staggered in cross section and have an included angle of 60 ° with each other.
8. An indoor asphalt mixture mixer according to claim 1, wherein the raw material adding device (2) is composed of one or more parallel material storage tanks (2-1) with heat preservation function, the bottom of the material storage tank (2-1) is provided with a heat preservation material guide pipe (2-5), one end of the heat preservation material guide pipe is connected with the discharge port (2-1-2) of the material storage tank, and the other end of the heat preservation material guide pipe is connected with the feeding port (3-1-1) of the mixing tank; still establish storage tank vibrator (2-2), gravity sensor (2-3), solenoid valve (2-4) at storage tank bottom, raw materials adds device (2) has the function of carrying out heat preservation storage and interpolation to the raw materials, and adds order, quality, time controllable.
9. An indoor mixer of asphalt mixture according to claim 2, characterized in that the inlet (3-1-1) of the mixing bowl is a circular hole, is communicated with a material storage tank discharge port (2-1-2) through a heat preservation material guide pipe (2-5), the mixing cylinder discharge port (3-1-2) is of a circular open structure and is provided with a mixing cylinder discharge port sealing cover (3-1-4), the mixing cylinder discharge port sealing cover (3-1-4) is a circular cover connected in a locking manner, a handle is arranged at the outer side of the smoke absorbing device, a smoke absorbing device (4) is embedded at the inner side and is made by compounding metal and heat insulating materials, the asphalt smoke absorbing device (4) is embedded inside a sealing cover (3-1-4) at a discharge port of the mixing tank, and the heat-insulating material is preferably mineral wool or composite silicate.
10. An indoor mixer for asphalt mixture according to claim 1, wherein the flue gas absorbing device (4) is made of an asphalt smoke absorbing material, is a cylinder, has a bottom diameter the same as the inner diameter of the sealing cover (3-1-4) at the discharge port of the mixing bowl, is embedded inside the cylinder, and can absorb harmful gases such as asphalt smoke generated in the production process of the mixture, and the asphalt smoke absorbing material is a porous active substance with a large specific surface area, such as activated carbon.
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