CN111472237A - Asphalt mixing equipment - Google Patents
Asphalt mixing equipment Download PDFInfo
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- CN111472237A CN111472237A CN202010314342.6A CN202010314342A CN111472237A CN 111472237 A CN111472237 A CN 111472237A CN 202010314342 A CN202010314342 A CN 202010314342A CN 111472237 A CN111472237 A CN 111472237A
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- asphalt
- preheating cylinder
- mixing
- stirring
- preheating
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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
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- Road Paving Machines (AREA)
Abstract
The invention relates to the field of asphalt processing, in particular to asphalt mixing equipment.A plurality of guide plates are arranged on the inner side wall of a preheating cylinder body, asphalt materials can be injected from the upper end of the preheating cylinder body, the asphalt materials flow to the discharge end of the preheating cylinder body along a guide groove under the action of gravity, a first heating device heats the preheating cylinder body to improve the flowability of the asphalt materials, a scraping knife of the scraping device rotates relative to the preheating cylinder body, asphalt overflowing a guide chute moves to the feed end of the preheating cylinder body under the driving of the scraping knife, and the asphalt materials on the scraping knife can be bonded and drive part of the asphalt materials in the guide chute to move to the feed end of the preheating cylinder body due to the viscosity of the asphalt materials, so that the asphalt materials in the guide chute roll; the stirring mechanism located at the discharge end of the preheating cylinder can mix mineral aggregate and asphalt materials in the stirring chamber through the stirring arm capable of swinging in a rotating mode, and asphalt mixture after mixing is discharged out of the equipment through the discharge mechanism and is used for road construction.
Description
Technical Field
The invention relates to the field of asphalt processing, in particular to asphalt mixing equipment.
Background
Asphalt concrete (Bituminous concrete) is commonly called as asphalt concrete, and is a mixture prepared by manually selecting mineral aggregate with a certain gradation composition, broken stone or crushed gravel, stone chips or sand, mineral powder and the like, and mixing the mineral aggregate with a certain proportion of road asphalt material under strictly controlled conditions. According to the different gradation of mineral aggregate, the mixture can be divided into dense gradation, semi-open gradation and open gradation, and the open gradation mixture is also called asphalt macadam. The hot-mixed and hot-paved dense-graded broken stone mixture is durable in use, high in strength and good in integrity, is a representative material for building high-grade asphalt pavements, and is most widely applied.
The asphalt concrete for constructing the asphalt road needs to ensure that mineral aggregate and asphalt are uniformly mixed, otherwise, the proportion of the asphalt mixture in the upper part of the asphalt road is abnormal, and the service life and the bearing capacity of the asphalt road are influenced.
In order to ensure that mineral aggregate and asphalt are uniformly mixed, the existing asphalt mixing machine can heat the mixture or prolong the mixing time when the mineral aggregate and the asphalt are mixed, and dead angles of stirring and heating can occur in a stirring bin of the asphalt mixing machine difficultly to avoid, so that the caking of the asphalt material or the reduction of the fluidity of part of the asphalt material is caused, and the mixing quality of the asphalt mixture is influenced.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an asphalt mixing device to solve the problem that the existing asphalt mixer is easy to cause asphalt material caking or asphalt material flowability reduction.
Based on the above, the invention provides asphalt mixing equipment which is characterized by comprising a preheating mechanism, a stirring mechanism and a discharging mechanism;
the preheating mechanism comprises a scraping device, a rack and a preheating cylinder body which is rotatably connected to the rack;
the preheating cylinder body is of a hollow structure, two ends of the preheating cylinder body are communicated, and a plurality of guide plates spirally arranged around the axis of the preheating cylinder body are uniformly arranged on the inner side wall of the preheating cylinder body, so that a guide groove is formed by the inner side wall of the preheating cylinder body and two adjacent guide plates; the rack is provided with a first heating device for heating the preheating cylinder; the scraping device is positioned in the preheating cylinder and comprises a plurality of scraping knives which are spirally arranged around the axis of the preheating cylinder and are rotatably connected with the preheating cylinder, the scraping knives and the guide plates are oppositely arranged, and the spiral rotating directions of the scraping knives and the guide plates are opposite, so that the asphalt overflowing the guide chute moves to the feeding end of the preheating cylinder under the driving of the scraping knives;
the stirring mechanism is connected to the discharge end of the preheating cylinder body and comprises a stirring chamber and two stirring devices which are positioned in the stirring chamber and arranged in parallel, and each stirring device comprises a driving shaft which is rotatably connected to the stirring chamber and a stirring arm which is connected to the driving shaft;
the discharging mechanism is connected to the discharging end of the stirring mechanism.
Preferably, the scraping device further comprises a guide cylinder rotatably connected to the preheating cylinder body, the outer side wall of the guide cylinder and the inner side wall of the preheating cylinder body are oppositely arranged and parallel to each other, and the scraping knife is arranged on the outer side wall of the guide cylinder.
Preferably, the first heating device comprises a heating coil arranged around the preheating cylinder, the heating coil and the preheating cylinder are coaxially arranged, and the heating coil is located between the rack and the preheating cylinder.
Preferably, one or more radiating pipes are arranged in the guide cylinder, heat collecting pipes are arranged in the guide cylinder, and heat conducting media are filled in the radiating pipes and the heat collecting pipes;
the preheating device is characterized in that a pump liquid device is arranged in the preheating barrel, a pump shell of the pump liquid device is fixedly connected with the preheating barrel, an impeller of the pump liquid device is connected with the guide cylinder, a liquid discharge end of the pump liquid device is connected with a liquid inlet end of the heat collecting tube, the liquid discharge end of the heat collecting tube is connected with the liquid inlet end of the heat radiating tube through a liquid guide sliding ring, and the liquid discharge end of the heat radiating tube is connected with the liquid inlet end of the pump liquid device.
Preferably, the drive shaft is provided with a plurality of the agitating arms, and the agitating arms extend radially outward of the drive shaft; the stirring arms on the two driving shafts are arranged in a staggered mode, and the rotating directions of the two driving shafts are opposite.
Preferably, a mixing component is arranged at the tail end of the mixing arm, the mixing component is provided with a convex mixing surface with an arc-shaped cross section, and the mixing surface collides with and mixes the asphalt concrete in the mixing chamber when the driving shaft rotates.
Preferably, the cross section of the head part of the mixing component is arc-shaped, and the thickness of the cross section of the tail part of the mixing component is gradually reduced from the head part to the tail part of the mixing component;
the distance between the tail of the mixing component and the center of the cross section of the head of the mixing component is more than three times of the radius of the cross section of the head of the mixing component.
Preferably, the discharging mechanism comprises a plurality of discharging pipes arranged side by side, and the feeding ends of the discharging pipes are connected to the stirring chamber;
a discharge device is arranged in the discharge pipe and is provided with a discharge screw rod which is rotatably connected with the discharge pipe and is coaxially arranged with the discharge pipe; the discharging screw rod is provided with a heating cavity which is coaxial with the discharging screw rod, and a heat-conducting medium is filled in the heating cavity.
Preferably, a liquid storage tank is arranged in the stirring chamber, and the liquid storage tank is connected to the heating cavity through a circulating pump; and a second heating device is arranged on the liquid storage tank.
Preferably, the preheating mechanism is arranged above the stirring mechanism;
the stirring mechanism is provided with a first feed hole and a second feed hole which are communicated with the stirring chamber, the second feed hole is annular and surrounds the first feed hole, the discharge end of the preheating cylinder is connected with the first feed hole, and the second feed hole is provided with a feeding funnel.
The asphalt mixing equipment of the invention is provided with a preheating cylinder body which is rotationally connected with a frame, a plurality of guide plates which are spirally arranged around the axis of the preheating cylinder body are uniformly arranged on the inner side wall of the preheating cylinder body, a guide groove is formed by the inner side wall of the preheating cylinder body and two adjacent guide plates, asphalt material can be injected from the upper end of the preheating cylinder body, the asphalt material flows to the discharge end of the preheating cylinder body along the guide groove under the action of gravity, a first heating device heats the preheating cylinder body to improve the fluidity of the asphalt material, in order to ensure that the asphalt material in the guide groove is uniformly heated, a scraper of the scraper rotates relative to the preheating cylinder body, the scraper is spirally arranged around the axis of the preheating cylinder body, the asphalt which overflows the guide groove moves to the feed end of the preheating cylinder body under the driving of the scraper, and the asphalt material on the scraper can be bonded and drive part of the asphalt material in the guide groove to move to the feed end of the preheating cylinder body due to certain viscosity, rolling the asphalt material in the guide chute; the stirring mechanism located at the discharge end of the preheating cylinder can mix mineral aggregate and asphalt materials in the stirring chamber through the stirring arm capable of swinging in a rotating mode, and asphalt mixture after mixing is discharged out of the equipment through the discharge mechanism and is used for road construction.
Drawings
FIG. 1 is one of the overall schematic structural views of an asphalt mixing apparatus according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of the overall structure of an asphalt mixing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of an asphalt mixing apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a pre-heating mechanism of an asphalt mixing apparatus in accordance with an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a stirring mechanism of an asphalt mixing apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a stirring mechanism of an asphalt mixing apparatus according to an embodiment of the present invention;
FIG. 7 is a simplified schematic diagram of a liquid pumping device, a heat collecting tube and a heat radiating tube of the asphalt mixing apparatus according to the embodiment of the present invention.
100, a preheating mechanism; 110. a scraping device; 111. a scraping knife; 111a, scraping the material surface; 112. a draft tube; 113. a radiating pipe; 120. a frame; 121. a first heating device; 130. preheating the cylinder; 131. a baffle; 132. a diversion trench; 133. a liquid pumping device; 134. a heat collecting pipe; 140. a material guiding cover; 141. an asphalt feed port; 200. a stirring mechanism; 210. a stirring chamber; 220. a drive shaft; 230. a stirring arm; 240. a mixing component; 241. mixing the dough; 250. a first feed port; 260. a second feed port; 300. a discharge mechanism; 310. a discharge pipe; 320. a discharge screw; 321. a chamber is heated.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1-7, an asphalt mixing apparatus of the present invention is schematically illustrated, including a preheating mechanism 100, a stirring mechanism 200, and a discharge mechanism 300. In this embodiment, the preheating mechanism 100, the stirring mechanism 200 and the discharging mechanism 300 are sequentially arranged from top to bottom and are sequentially connected.
The preheating mechanism 100 includes a scraping device 110, a frame 120, and a preheating cylinder 130 rotatably connected to the frame 120.
As shown in fig. 4, the preheating cylinder 130 is a hollow structure and has two ends communicating with each other, preferably a conical cylindrical structure, the axis of the preheating cylinder 130 is vertically arranged, the upper part is a feeding end, and the lower part is a discharging end. The preheating cylinder 130 is provided with a plurality of guide plates 131 spirally arranged around the axis of the preheating cylinder 130 uniformly on the inner side wall, so that the inner side wall of the preheating cylinder 130 and two adjacent guide plates 131 form a guide groove 132, therefore, the guide groove 132 is also spirally arranged around the axis of the preheating cylinder 130, and after asphalt material flows into the guide groove 132 from the feed end of the preheating cylinder 130, the asphalt material can flow through a longer path in the preheating cylinder 130 just because the guide groove 132 is spirally arranged. Be equipped with the first heating device 121 that is used for preheating barrel 130 heating on the frame 120, preheat barrel 130 and guide plate 131 and be the integral structure, and the two all adopts metal material to make, so first heating device 121 heats the back to preheating barrel 130, preheat barrel 130 and can be with heat transfer to guide plate 131, a plurality of guide plates 131 are similar to radiating fin in preheating barrel 130 shape for the asphalt material in guiding gutter 132 heats, promote the mobility of asphalt material.
The scraping device 110 is located in the preheating cylinder 130, the scraping device 110 includes a plurality of scraping knives 111 spirally arranged around the axis of the preheating cylinder 130 and rotatably connected to the preheating cylinder 130, the scraping knives 111 and the guide plates 131 are oppositely arranged, and the spiral directions of the scraping knives 111 and the guide plates 131 are opposite, when the scraping knives 111 rotate relative to the preheating cylinder 130, the asphalt overflowing the guide chute moves towards the feeding end of the preheating cylinder 130 under the driving of the scraping knives 111, and the asphalt material itself has a certain viscosity, so the asphalt material on the scraping knives 111 can be adhered and drive part of the asphalt material in the guide chute to move towards the feeding end of the preheating cylinder 130, and the asphalt material in the guide chute rolls.
The asphalt mixing equipment of the invention has a preheating cylinder 130 rotationally connected with a frame 120, a plurality of guide plates 131 spirally arranged around the axis are uniformly arranged on the inner side wall of the preheating cylinder 130, a guide groove 132 is formed by the inner side wall of the preheating cylinder 130 and two adjacent guide plates 131, asphalt material can be injected from the upper end of the preheating cylinder 130, the asphalt material flows to the discharge end of the preheating cylinder 130 along the guide groove 132 under the action of gravity, a first heating device 121 heats the preheating cylinder 130 to improve the fluidity of the asphalt material, in order to ensure that the asphalt material in the guide groove 132 is uniformly heated, a scraper knife 111 of a scraper device 110 rotates relative to the preheating cylinder 130, and the scraper knife 111 is spirally arranged around the axis of the preheating cylinder 130, the asphalt overflowing the guide groove moves to the feed end of the preheating cylinder 130 under the drive of the scraper knife 111, and the asphalt material has certain viscosity, therefore, the asphalt material on the scraper 111 can be adhered and drive part of the asphalt material in the guide chute to move towards the feeding end of the preheating cylinder 130, so that the asphalt material in the guide chute rolls; the stirring mechanism 200 located at the discharge end of the preheating cylinder 130 can mix the mineral aggregate and the asphalt material in the stirring chamber 210 through the rotating and swinging stirring arm 230, and the mixed asphalt mixture is discharged out of the equipment through the discharge mechanism 300 for road construction.
The operation principle of the preheating mechanism 100 is as follows: asphalt material entering the diversion trench 132 from the feed end of the preheating cylinder 130 flows along the diversion trench 132 under the action of gravity, because the cross section of the diversion trench 132 is substantially U-shaped, and the opening of the diversion trench 132 is arranged towards the center of the preheating cylinder 130, asphalt material in the diversion trench 132 inevitably overflows from the opening of the diversion trench 132, and the spiral directions of the scraper knife 111 and the diversion plate 131 are opposite, when the scraper knife 111 rotates relative to the preheating cylinder 130, the scraper knife 111 scrapes the asphalt material overflowing from the diversion trench 132 and drives the overflowing asphalt material to move towards the feed end of the preheating cylinder 130, and the asphalt material on the scraper knife 111 adheres to the asphalt material in the diversion trench 132, so that the asphalt material in the diversion trench 132 rolls, and the asphalt material in the diversion trench 132 also continuously rolls to be heated uniformly.
The strength of asphalt mixtures is mainly manifested in two aspects. The first is the adhesive force of the cementing material formed by asphalt and mineral powder; the other is the internal friction and the locking force among the aggregate particles. The large surface area of the fine mineral powder particles (mostly less than 0.075 mm) enables the bituminous material to form a film, thereby improving the bonding strength and temperature stability of the bituminous material; while the locking forces are mainly generated between the coarse aggregate particles. The asphalt concrete mineral aggregate grade timing is selected and considered, so that the mixture can form a compact and stable pavement with proper roughness and durability after a proper amount of asphalt is added. There are many methods for matching with mineral aggregate, which can be calculated by formula, or the gradation range can be regulated by experience, and china adopts the gradation range of experience curve.
The stirring mechanism 200 is connected to the discharge end of the preheating cylinder 130, the stirring mechanism 200 includes a stirring chamber 210 and two stirring devices which are located in the stirring chamber 210 and are arranged in parallel, the stirring devices include a driving shaft 220 rotatably connected to the stirring chamber 210 and a stirring arm 230 connected to the driving shaft 220, and the driving shaft 220 drives the stirring arm 230 to swing so as to mix the mineral aggregate and the asphalt material in the stirring chamber 210.
The discharging mechanism 300 is connected to the discharging end of the stirring mechanism 200, and when the stirring mechanism 200 completes the mixing of the asphalt mixture, the discharging mechanism 300 discharges the asphalt mixture for road construction.
Specifically, the scraping device 110 further includes a guide cylinder 112 rotatably connected to the preheating cylinder 130, an outer side wall of the guide cylinder 112 and an inner side wall of the preheating cylinder 130 are oppositely disposed and parallel to each other, preferably, the guide cylinder 112 is of a truncated cone structure, the scraping knife 111 is disposed on the outer side wall of the guide cylinder 112, and a space between the guide cylinder 112 and the preheating cylinder 130 is used for guiding the asphalt material and preheating the asphalt material. Of course, in order to further enhance the heating effect on the asphalt material, a heating device may be optionally installed on the guide shell 112, and the heating device may heat the guide shell 112 and the scraper 111.
In addition, the preheating mechanism 100 further includes a guiding cover 140, the guiding cover 140 is provided with an arc asphalt feeding hole 141, a space between the guide cylinder 112 and the preheating cylinder 130 is disposed opposite to the asphalt feeding hole 141, and the guiding cover 140 can prevent asphalt material from dropping on the top end of the guide cylinder 112 when entering the preheating cylinder 130.
Compared with the existing asphalt mixing equipment (the existing equipment is Q L B (Y) -25 of Dekoda mechanical manufacturing Co., Ltd.), the average output per hour of the asphalt concrete of the asphalt mixing equipment is 36 tons, and compared with the average output per hour of the existing asphalt mixing equipment Q L B (Y) -25 of 27 tons, the output of the asphalt mixing equipment of the invention is improved by over 30 percent, but the fuel consumption (mixing 1 ton of mineral aggregate) of the asphalt mixing equipment of the invention is 9-9.2 Kg, which is slightly higher than the fuel consumption of the existing asphalt mixing equipment Q L B (Y) -25 of 7.5 Kg.
In order to prevent the asphalt material from adhering to the joint between the scraper 111 and the guide cylinder 112 and agglomerating, the scraper 111 is arranged in a vertical section inclined to the horizontal plane, that is, the inner side of the scraper 111 is fixedly connected to the guide cylinder 112, the outer side of the scraper 111 extends to the radial outer side of the guide cylinder 112, and the outer side of the scraper 111 is inclined to the discharge end of the preheating cylinder 130, so that the asphalt material on the scraper 111 can gradually slide relative to the scraper 111a of the scraper 111 under the action of gravity until leaving the scraper 111a (the scraper 111a is arranged towards the feed end of the preheating cylinder 130).
The first heating device 121 includes a heating coil disposed around the preheating cylinder 130, the heating coil and the preheating cylinder 130 are coaxially disposed, and the heating coil is located between the rack 120 and the preheating cylinder 130. The heating coil heats the preheating cylinder 130 by an eddy current effect, thereby heating the asphalt material in the preheating cylinder 130. The heating coil has the advantages that the heating coil does not need to contact the preheating cylinder 130, the rotation of the preheating cylinder 130 relative to the rack 120 is not disturbed, the increase of the rotation resistance of the preheating cylinder 130 is avoided, the increase of the weight of the preheating cylinder 130 can also be avoided (compared with heating equipment such as heating wires arranged on the preheating cylinder 130), the moment of inertia of the preheating cylinder 130 is reduced, and the energy consumption of the asphalt mixing equipment is further reduced.
Further, one or more heat dissipation pipes 113 are arranged in the draft tube 112, the heat dissipation pipes 113 penetrate through the top end and the bottom end of the draft tube 112, the heat collection pipe 134 is arranged in the draft plate 131, and the heat dissipation pipes 113 and the heat collection pipe 134 are filled with heat conduction media, wherein the heat conduction media can adopt existing heat conduction oil.
As shown in fig. 4 and 7, a pump fluid device 133 is disposed in the preheating cylinder 130, the pump fluid device 133 is preferably an impeller pump, a pump housing of the pump fluid device 133 is fixedly connected to the preheating cylinder 130, and an impeller of the pump fluid device 133 is connected to the guide cylinder 112, because the guide cylinder 112 can rotate relative to the preheating cylinder 130, when the guide cylinder 112 and the preheating cylinder 130 rotate relative to each other, the guide cylinder 112 drives the impeller of the pump fluid device 133 to rotate relative to the pump housing, so as to implement operation of the pump fluid device 133. The liquid discharge end of the liquid pumping device 133 is connected to the liquid inlet end of the heat collecting tube 134, the liquid discharge end of the heat collecting tube 134 is connected to the liquid inlet end of the heat radiating tube 113 through the liquid guiding slip ring, the liquid discharge end of the heat radiating tube 113 is connected to the liquid inlet end of the liquid pumping device 133, when the guide cylinder 112 and the preheating cylinder 130 rotate relatively, the liquid pumping device 133 drives the heat collecting tube 134 and the heat conducting medium in the heat radiating tube 113 to flow, and since the first heating device 121 can heat the preheating cylinder 130 (guide plate 131), the heat of the preheating cylinder 130 collected by the heat collecting tube 134 in the guide plate 131 is transferred to the heat radiating tube 113 (guide cylinder 112) through the heat conducting medium, so that the guide cylinder 112 and the scraper 111 obtain heat energy and heat the asphalt material. This can avoid installing additional heating equipment on the guide shell 112, and can reduce the weight of the scraper 110 and the energy consumption of the whole preheating mechanism 100.
By adopting the heat conduction system composed of the liquid pumping device 133, the heat collecting tube 134 and the heat radiating tube 113, the heating device on the guide shell 112 is omitted, and the weight of the preheating mechanism 100 can be greatly reduced. Meanwhile, the preheating cylinder 130 and the scraping device 110 share the first heating device 121, so that the electric energy loss of the heating device on the guide cylinder 112 is reduced. The fuel oil consumption (mixing 1 ton of mineral aggregate) of the asphalt mixing equipment is reduced to 7.8-8.1 Kg, and the fuel oil consumption of the asphalt mixing equipment is close to that of the existing asphalt mixing equipment under the condition of keeping the yield improved, so that the market competitiveness and the energy utilization rate of the asphalt mixing equipment are undoubtedly improved.
Referring to fig. 5 and 6, the driving shaft 220 is provided with a plurality of stirring arms 230, the stirring arms 230 extend to the radial outer side of the driving shaft 220, the stirring arms 230 of the two driving shafts 220 are arranged in a staggered manner, and the rotation directions of the two driving shafts 220 are opposite, so as to mix the mineral aggregate and the asphalt material in the stirring chamber 210. The stirring mechanism 200 may further be provided with an existing heating device to heat the mineral aggregate and the asphalt material in the stirring chamber 210, so as to achieve hot mixing. The end of the stirring arm 230 is provided with a stirring member 240, the stirring member 240 has a convex stirring surface 241 with an arc-shaped cross section, the stirring surface 241 collides with and stirs the asphalt concrete in the stirring chamber 210 when the driving shaft 220 rotates, and the convex stirring surface 241 can prevent the asphalt concrete (or asphalt mixture) from adhering to the stirring surface 241 for a long time and agglomerating.
Specifically, the cross section of the head of the mixing component 240 is arc-shaped, that is, the mixing surface 241 is the head of the mixing component 240, and the thickness of the cross section of the tail of the mixing component 240 is gradually reduced from the head to the tail of the mixing component 240; the distance between the tail of the mixing component 240 and the circle center of the cross section of the head of the mixing component 240 is larger than three times of the radius of the cross section of the head of the mixing component 240, so that the cross section of the mixing component 240 is approximately in a water droplet shape, and the tail structure of the mixing component 240 can effectively prevent asphalt mixture from adhering to the surface of the tail structure.
In addition, the discharge mechanism 300 includes a plurality of discharge pipes 310 arranged side by side, the feed end of the discharge pipe 310 is connected to the stirring chamber 210, a discharge device is arranged in the discharge pipe 310, the discharge device has a discharge screw 320 rotatably connected to the discharge pipe 310 and coaxially arranged with the discharge pipe 310, and the discharge screw 320 can drive the asphalt mixture in the discharge pipe 310 to move relative to the discharge pipe 310 and finally discharge the discharge pipe 310 when rotating. The discharging screw 320 is provided with a heating cavity 321 coaxially arranged with the discharging screw, the heating cavity 321 is cylindrical, and a heat conducting medium is filled in the heating cavity 321, and the heat conducting medium can be the existing heat conducting oil. Correspondingly, be equipped with the liquid reserve tank in the stirring cavity 210, the liquid reserve tank intussuseption is filled with heat-conducting medium, and the liquid reserve tank passes through the circulating pump to be connected in heating chamber 321, is equipped with second heating device on the liquid reserve tank, and second heating device can be current heater strip, and second heating device can heat the heat-conducting medium in the liquid reserve tank, and the heat that second heating device gived off simultaneously can be used for heating the bituminous mixture in the stirring cavity 210 equally. The heat conducting medium transfers heat to the heating cavity 321 to heat the discharge screw 320, so as to ensure good fluidity of the asphalt mixture in the discharge pipe 310, and facilitate the discharge of the asphalt mixture from the discharge pipe 310 at any time.
As shown in fig. 5, a plurality of discharge pipes 310 arranged in parallel can discharge the materials individually or simultaneously. In the process of asphalt road paving, the use amount of asphalt mixture is undulant, and is unstable, and consequently, a plurality of row that set up side by side arrange material pipe 310 can arrange alone respectively to discharge a small amount of asphalt mixture quantitatively, asphalt mixture when satisfying asphalt road paving uses the valley period, and the asphalt mixing volume of current asphalt mixing equipment is great, and when the asphalt mixture use amount when asphalt road paving was less, it was wasted to have a large amount of asphalt mixture.
In the present embodiment, the preheating mechanism 100 is disposed above the stirring mechanism 200; the stirring mechanism 200 is provided with a first feed port 250 and a second feed port 260 which are communicated with the stirring chamber 210, the second feed port 260 is annular and is arranged around the first feed port 250, the discharge end of the preheating cylinder 130 is connected with the first feed port 250, the second feed port 260 is provided with a feed hopper, and constructors can add mineral materials into the stirring chamber 210 through the hopper on the second feed port 260.
In summary, the asphalt mixing apparatus of the present invention includes a preheating cylinder 130 rotatably connected to a frame 120, a plurality of guide plates 131 spirally arranged around an axis of the preheating cylinder 130 are uniformly arranged on an inner sidewall of the preheating cylinder 130, a guide groove 132 is formed by the inner sidewall of the preheating cylinder 130 and two adjacent guide plates 131, asphalt material can be injected from an upper end of the preheating cylinder 130, the asphalt material flows toward a discharge end of the preheating cylinder 130 along the guide groove 132 under the action of gravity, a first heating device 121 heats the preheating cylinder 130 to improve the fluidity of the asphalt material, in order to uniformly heat the asphalt material in the guide groove 132, a scraper 111 of a scraper device 110 rotates relative to the preheating cylinder 130, the scraper 111 is spirally arranged around the axis of the preheating cylinder 130, the asphalt overflowing the guide groove moves toward a feed end of the preheating cylinder 130 under the action of the scraper 111, and the asphalt material itself has a certain viscosity, therefore, the asphalt material on the scraper 111 can be adhered and drive part of the asphalt material in the guide chute to move towards the feeding end of the preheating cylinder 130, so that the asphalt material in the guide chute rolls; the stirring mechanism 200 located at the discharge end of the preheating cylinder 130 can mix the mineral aggregate and the asphalt material in the stirring chamber 210 through the rotating and swinging stirring arm 230, and the mixed asphalt mixture is discharged out of the equipment through the discharge mechanism 300 for road construction.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An asphalt mixing device is characterized by comprising a preheating mechanism (100), a stirring mechanism (200) and a discharging mechanism (300);
the preheating mechanism (100) comprises a scraping device (110), a rack (120) and a preheating cylinder (130) rotatably connected to the rack (120);
the preheating cylinder (130) is of a hollow structure, two ends of the preheating cylinder are communicated, a plurality of guide plates (131) spirally arranged around the axis of the preheating cylinder (130) are uniformly arranged on the inner side wall of the preheating cylinder (130), and a guide groove (132) is formed by the inner side wall of the preheating cylinder (130) and two adjacent guide plates (131); a first heating device (121) for heating the preheating cylinder (130) is arranged on the rack (120); the scraping device (110) is positioned in the preheating cylinder (130), the scraping device (110) comprises a plurality of scraping knives (111) which are spirally arranged around the axis of the preheating cylinder (130) and are rotatably connected to the preheating cylinder (130), the scraping knives (111) and the guide plates (131) are oppositely arranged, and the spiral directions of the scraping knives (111) and the guide plates (131) are opposite, so that asphalt overflowing the guide chute moves towards the feeding end of the preheating cylinder (130) under the driving of the scraping knives (111);
the stirring mechanism (200) is connected to the discharge end of the preheating cylinder (130), the stirring mechanism (200) comprises a stirring chamber (210) and two stirring devices which are positioned in the stirring chamber (210) and are arranged in parallel, and the stirring devices comprise a driving shaft (220) rotatably connected to the stirring chamber (210) and a stirring arm (230) connected to the driving shaft (220);
the discharging mechanism (300) is connected to the discharging end of the stirring mechanism (200).
2. Asphalt mixing equipment according to claim 1, wherein said scraper (110) further comprises a guide cylinder (112) rotatably connected to said preheating cylinder (130), the outer side wall of said guide cylinder (112) and the inner side wall of said preheating cylinder (130) are oppositely arranged and parallel to each other, and said scraper (111) is arranged on the outer side wall of said guide cylinder (112).
3. Asphalt mixing plant according to claim 1, characterized in that said first heating means (121) comprise a heating coil arranged around said preheating cylinder (130), said heating coil being arranged coaxially with said preheating cylinder (130) and said heating coil being located between said stand (120) and said preheating cylinder (130).
4. Asphalt mixing equipment according to claim 2, wherein one or more heat-radiating pipes (113) are arranged in the guide cylinder (112), heat-collecting pipes (134) are arranged in the guide plate (131), and heat-conducting media are filled in the heat-radiating pipes (113) and the heat-collecting pipes (134);
preheat and be equipped with pump liquid device (133) in barrel (130), the pump case fixed connection of pump liquid device (133) preheat barrel (130), the impeller of pump liquid device (133) connect in draft tube (112), the flowing back end of pump liquid device (133) connect in the inlet end of thermal-collecting tube (134), the flowing back end of thermal-collecting tube (134) through leading liquid sliding ring connect in the inlet end of cooling tube (113), the flowing back end of cooling tube (113) connect in the inlet end of pump liquid device (133).
5. Asphalt mixing plant according to claim 1, characterized in that said drive shaft (220) is provided with a plurality of said mixing arms (230), said mixing arms (230) extending radially outwards of said drive shaft (220); the stirring arms (230) on the two driving shafts (220) are arranged in a staggered mode, and the rotating directions of the two driving shafts (220) are opposite.
6. Asphalt mixing apparatus according to claim 5, characterized in that the stirring arm (230) is provided at its distal end with a mixing member (240), said mixing member (240) having a convex mixing surface (241) with an arc-shaped cross section, said mixing surface (241) colliding with and mixing the asphalt concrete in the mixing chamber (210) when the drive shaft (220) rotates.
7. Asphalt mixing equipment according to claim 6, characterized in that the cross section of the head part of the mixing part (240) is in the shape of a circular arc, and the thickness of the cross section of the tail part of the mixing part (240) is gradually reduced from the head part to the tail part of the mixing part (240);
the distance between the tail of the mixing part (240) and the center of the cross section of the head of the mixing part (240) is more than three times of the radius of the cross section of the head of the mixing part (240).
8. Asphalt mixing apparatus according to claim 1, characterized in that said discharge mechanism (300) comprises a plurality of discharge pipes (310) arranged side by side, the feed ends of said discharge pipes (310) being connected to said mixing chamber (210);
a discharging device is arranged in the discharging pipe (310), and the discharging device is provided with a discharging screw rod (320) which is rotatably connected with the discharging pipe (310) and is coaxial with the discharging pipe (310); the discharging screw rod (320) is provided with a heating cavity (321) which is coaxial with the discharging screw rod, and a heat-conducting medium is filled in the heating cavity (321).
9. Asphalt mixing plant according to claim 8, characterized in that a tank is provided in said stirring chamber (210), said tank being connected to said heating chamber (321) by means of a circulation pump; and a second heating device is arranged on the liquid storage tank.
10. Asphalt mixing plant according to claim 1, characterized in that said preheating means (100) is arranged above said stirring means (200);
seted up on rabbling mechanism (200) communicate in first feed port (250) and second feed port (260) of stirring cavity (210), second feed port (260) are the annular and encircle first feed port (250) set up, preheat the discharge end of barrel (130) and connect in first feed port (250), be equipped with feed hopper on second feed port (260).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010314342.6A CN111472237B (en) | 2020-04-20 | 2020-04-20 | Asphalt mixing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010314342.6A CN111472237B (en) | 2020-04-20 | 2020-04-20 | Asphalt mixing equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN111472237A true CN111472237A (en) | 2020-07-31 |
| CN111472237B CN111472237B (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010314342.6A Active CN111472237B (en) | 2020-04-20 | 2020-04-20 | Asphalt mixing equipment |
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| CN (1) | CN111472237B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4798533A (en) * | 1988-06-06 | 1989-01-17 | Collette Jerry R | Asphalt recycling conveyor |
| CN201538567U (en) * | 2009-11-30 | 2010-08-04 | 吉林省公路机械有限公司 | Asphaltic mixture insulation spiral conveyor |
| CN203684037U (en) * | 2014-01-22 | 2014-07-02 | 段少晖 | Mixing blade for pavement heat regeneration heated roller |
| CN205917574U (en) * | 2016-06-30 | 2017-02-01 | 山东普利龙压力容器有限公司 | Old and useless pitch heating mixer , heating mixing system and regeneration system |
| CN107261945A (en) * | 2017-07-14 | 2017-10-20 | 徐得强 | A kind of new and effective asphalt mixing for green building |
| CN208219351U (en) * | 2018-05-17 | 2018-12-11 | 四川路胜沥青科技有限公司 | Asphalt mixing plant |
-
2020
- 2020-04-20 CN CN202010314342.6A patent/CN111472237B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4798533A (en) * | 1988-06-06 | 1989-01-17 | Collette Jerry R | Asphalt recycling conveyor |
| CN201538567U (en) * | 2009-11-30 | 2010-08-04 | 吉林省公路机械有限公司 | Asphaltic mixture insulation spiral conveyor |
| CN203684037U (en) * | 2014-01-22 | 2014-07-02 | 段少晖 | Mixing blade for pavement heat regeneration heated roller |
| CN205917574U (en) * | 2016-06-30 | 2017-02-01 | 山东普利龙压力容器有限公司 | Old and useless pitch heating mixer , heating mixing system and regeneration system |
| CN107261945A (en) * | 2017-07-14 | 2017-10-20 | 徐得强 | A kind of new and effective asphalt mixing for green building |
| CN208219351U (en) * | 2018-05-17 | 2018-12-11 | 四川路胜沥青科技有限公司 | Asphalt mixing plant |
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| Publication number | Publication date |
|---|---|
| CN111472237B (en) | 2022-02-11 |
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