Environmentally friendly asphalt mixing system and mixing method for highway construction

Abstract

The present invention discloses an environmentally friendly asphalt mixing system and mixing method for highway construction, including a mixing box and a cover body, wherein the cover body is hinged at the front end position of the top of the mixing box, heating pipes are evenly arranged in the inner wall of the mixing box, a sub-screen and a guardrail are provided on the inner side of the top of the mixing box, the sub-screen and the guardrail are hinged at the rear end position of the top of the inner side of the mixing box, a conveying shaft penetrates between the two side walls of the mixing box, and the conveying shaft is rotatably connected to the mixing box. The present invention uses a two-way conveying dragon, a one-way conveying dragon and a guiding material diverter to synchronously drive the material, so as to turn the material in a multi-directional cycle, increase the stirring and mixing range of the material, thereby making it more uniform and achieving full mixing of the material. During the stirring process, the mesh plates on the sub-screen and the guardrail work continuously to form a buffer barrier, reduce material splashing and overflow, reduce material loss, reduce transportation costs, improve construction efficiency, ensure the quality of highway construction, and embody the technical advantages of energy saving and environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of highway construction, and in particular to an environmentally friendly asphalt mixing system and a mixing method for highway construction. Background Art

[0002] With the development of the times and the advocacy of policies, highway construction is becoming more and more important. In highway construction, asphalt is an important highway material, and the demand for asphalt in highway construction is increasing. Asphalt is a product of crude oil processing. It is a black or dark brown viscous liquid or solid at room temperature. It mainly contains soluble trichloroethylene derivatives. Its properties and composition vary with the source and generation method. Asphalt, like petroleum, is a complex organic mixture with no fixed chemical composition and physical constants. In civil engineering, asphalt is a widely used waterproof material and anti-corrosion material. It is mainly used for waterproofing of roofs, ground, and underground structures, and anti-corrosion of wood and steel. Asphalt is also a widely used pavement structure cementing material in road engineering. It can be used in proportion with mineral materials of different compositions to build asphalt pavements of different structures. Highway asphalt is obtained by mixing, heating and stirring the mixture. A stirring device is usually required during processing.

[0003] The stirring efficiency of asphalt devices currently on the market is relatively low. For example, the patent application number is 202021222390.4, and the name is a new patent for the use of an asphalt heating and stirring device for highway construction, which includes a heating tank and a stirring tank. The top of the heating tank is movably connected to a sealing cover through a rotating shaft, the interior of the heating tank is fixedly connected to a heating pipe, the bottom of the heating tank is fixedly connected to a connecting pipe, one side of the connecting pipe is fixedly installed with a control valve, the bottom of the connecting pipe is movably connected to a stirring tank, the bottom of the stirring tank is fixedly installed with a driving motor, and the top of the driving motor is movably connected to a stirring rod. The asphalt heating and stirring device for highway construction can fully heat the asphalt and increase the heating speed of the asphalt through the arrangement of the heating tank and the heating pipe, which facilitates the subsequent stirring of the stirring tank and can improve the stirring efficiency of the device. The arrangement of the stirring tank, the stirring rod and the stirring fan blades can improve the stirring efficiency of the device and make the asphalt stirring more sufficient and uniform. Since a large amount of materials are required and the mixing device does not mix sufficiently, the asphalt and the admixture materials are not mixed sufficiently, which will affect the quality of highway construction. In addition, the mixing tank is not convenient for transportation, and the materials need to be processed before being transferred and transported, which will waste a lot of manpower and material resources. This waste is not environmentally friendly and still cannot meet the current needs of highway construction.

[0004] Therefore, it is necessary to invent an environmentally friendly asphalt mixing system and mixing method for highway construction to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an environmentally friendly asphalt mixing system and mixing method for highway construction, so as to solve the problem that the existing mixing device does not stir sufficiently, thereby causing insufficient mixing of asphalt and admixture materials, affecting the construction quality of the highway, and the mixing tank is inconvenient to transport, requiring the materials to be processed before transfer and transportation, wasting a lot of manpower and material resources.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an environmentally friendly asphalt mixing system for highway construction, comprising a mixing box and a cover body, the cover body is hinged at the front end position of the top of the mixing box, heating pipes are evenly arranged in the inner wall of the mixing box, a sub-screen and a guardrail are provided on the inner side of the top of the mixing box, the sub-screen and the guardrail are hinged at the rear end position of the top of the inner side of the mixing box, a conveying shaft passes through the two side walls of the mixing box, and the conveying shaft is rotatably connected to the mixing box, symmetrically distributed spiral conveying plates are installed on both sides of the outer wall of the conveying shaft, a support frame is fixedly connected to the rear end side of the mixing box, a cover shell is fixedly connected between one end of the support frame and the mixing box, a first motor is fixedly connected inside the cover shell, the output shaft of the first motor is drivingly connected to the conveying shaft, a steering gear is fixedly connected to the middle part of the support frame, and the steering gear has a transverse rotating shaft parallel to the conveying shaft, and a longitudinal rotating shaft is arranged to be perpendicularly meshed with the transverse rotating shaft on the other side of the steering gear, and the transverse rotating shaft is connected to the mixing box by a coupling. The device is equipped with a conduction roller, and the conduction roller extends to the inside of the cover after passing through the support frame, and the first sprocket is fixedly connected to the outside of the conveying shaft, and one end of the conduction roller is fixedly connected to the second sprocket, and the first sprocket and the second sprocket are connected by a chain transmission. The middle end of the interior of the mixing box and the position above the spiral conveying plate are rotatably connected with two parallel guide material racks, one end of the two guide material racks are meshed with the conduction roller through steering gears for transmission, and the steering gears on both sides are symmetrically distributed about the perpendicular bisector of the steering device, the middle end of the interior of the mixing box and the position below the spiral conveying plate are rotatably connected with a one-way conveying dragon, and the one-way conveying dragon passes through the mixing box and extends to the bottom of the longitudinal rotating shaft, the outer walls of the longitudinal rotating shaft and one end of the one-way conveying dragon are fixedly connected with pulleys, and the two pulleys are connected by a transmission belt transmission, and a discharge channel is provided at a position corresponding to one end of the one-way conveying dragon at the bottom of the side wall of the mixing box, and a movable door assembly is provided on the outside of the discharge channel;

[0007] It also includes an auxiliary discharge component, which includes a high-pressure heating fan. A blowing port is provided in the middle of the bottom end of the mixing box. A one-way check valve is connected to the bottom of the blowing port through a flange. The bottom end of the one-way check valve is connected to the output end of the high-pressure heating fan through a metal conduit.

[0008] Preferably, the movable door assembly includes a shaft rod, a shaft sleeve is provided at the top of the outlet end of the discharge channel, and the shaft rod is rotatably connected to the inside of the shaft sleeve, arc-shaped pocket plates are integrally provided at the bottom of both ends of the shaft rod, and the arc-shaped pocket plates match the outlet end of the discharge channel, and a second motor is fixedly connected to the outer wall of the discharge channel, and the output shaft of the second motor is transmission-connected to the shaft rod.

[0009] Preferably, a splitting pipe is fixedly connected to the middle position of the top of the mixing box, the number of the cover body, the sub-screen and the guardrail is set to two groups, and the two groups of cover bodies, the sub-screen and the guardrail are symmetrically distributed about the splitting pipe axis.

[0010] Preferably, the sub-screen and guardrail include an outer frame, and limiting grooves are provided on both side walls inside the outer frame, through holes are opened on both sides of the outer frame away from the limiting grooves, and a mesh plate is movably connected to the inner side of the outer frame, and both sides of the mesh plate are respectively slidably connected to the limiting grooves on both sides, and both ends of the mesh plate are respectively matched with multiple through holes, and the ends of the mesh plate are movably connected to the through holes.

[0011] Preferably, the mesh plate is composed of stainless steel bars welded in a grid shape, the outer end of the outer frame is fixedly connected to a cylinder, and the connecting end of the cylinder is provided with a pneumatic device for controlling the telescopic movement of the cylinder, the output end of the cylinder is fixedly connected to a conduction card plate, and the other end of the conduction card plate is fixedly connected to the mesh plate.

[0012] Preferably, a controller is further included, the first motor and the second motor are both configured as servo motors, and the high-pressure heating fan, the first motor and the second motor are all electrically connected to the controller.

[0013] Preferably, the number of the conductive rollers is set to one or two, and a shield is fixedly connected to the top of the support frame, and the number of the shield corresponds to the number of the conductive rollers.

[0014] Preferably, a connecting frame is provided at the rear end of the mixing box, and the connecting frame is fixedly mounted on the dividing pipe and the supporting frame, and the connecting frame is used to connect to the external vehicle body.

[0015] A mixing method of an environmentally friendly asphalt mixing system for highway construction, comprising the above-mentioned mixing device, is specifically operated as follows:

[0016] Step 1: Pour the heated and melted asphalt into the mixing box, control the external heater to heat the heating pipe at its active end to keep the asphalt in a fluid state, start the pneumatic device to reciprocate and retract the cylinder output end, and the mesh plate reciprocates under the pull of the conductive card. Pour the mixed materials such as gravel that need to be mixed from the top of the mixing box, and screen them under the action of the mesh plate to separate larger substances;

[0017] Step 2: Start the first motor through the controller so that its output end drives the conveying shaft to rotate, and under the driving action of the first sprocket, the second sprocket and the chain, the conduction roller rotates, and the longitudinal shaft rotates under the action of the steering gear. The longitudinal shaft rotates synchronously with the one-way conveying dragon under the drive of the transmission belt, pushing the material in the mixing to one side of the discharge channel, and the two conduction rollers synchronously drive the two guide material racks through the steering gear, and the two guide material racks shift the material from the middle to both sides, and the two spiral conveying plates symmetrically distributed on the conveying shaft constitute a two-way conveying dragon, which transports the material to the middle section and transports it to the bottom of the guide material rack;

[0018] Step 3: During the mixing process, close the sub-screen, guardrail and cover, and keep the screen plate shaking back and forth so that the screen plate forms a buffer barrier to reduce splashing and overflow of materials;

[0019] Step 4: When the mixing is sufficient and unloading is required, the second motor is started through the controller to rotate its output end 90°, so that the shaft rotates in the sleeve, driving the arc-shaped pocket plate to rise. At this time, the outlet end of the discharge channel is opened, and the material is discharged under the guidance of the rotating connection and the one-way conveying dragon. During discharging, the high-pressure heating fan works to generate high-temperature and high-pressure air that enters the mixing box from the air port through the metal conduit and the one-way check valve, heating and blowing, so that the material falls quickly and reduces the material residue on the inner wall of the mixing box.

[0020] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0021] 1. By heating and mixing asphalt and mixed materials in a mixing box, the conveying shaft is driven by the output end of the first motor to drive the two-way conveying dragon, and synchronously drives the one-way conveying dragon and the guiding material rack to move the material from the top of the middle position to both sides, and transport the material from the bottom to the middle section, and also transport the material to one side, so as to increase the stirring and mixing range of the material, so as to make it more uniform and achieve full mixing of the material. During the stirring process, the screen and the mesh plates on the guardrail work continuously to form a buffer barrier, reduce material splashing and overflow, and reduce material loss. The device moves with the project, so as to realize the direct processing and manufacturing of road construction materials on the construction section, reduce transportation costs, greatly improve construction efficiency, and ensure the quality of highway construction. This device realizes one-machine linkage, saves power sources, effectively utilizes mechanical energy, improves the effective utilization of resources, and reduces equipment maintenance costs;

[0022] 2. The output end of the second motor rotates and the material is discharged after the mixing is completed. The shaft rotates in the shaft sleeve, driving the arc-shaped pocket plate to rise. At this time, the outlet end of the discharge channel is opened, and the material is discharged under the guidance of the rotating connection and the one-way conveying dragon. During the discharge, the high-pressure heating fan works to generate high-temperature and high-pressure air that enters the mixing box from the air port through the metal conduit and the one-way check valve, heating and blowing the material to make it fall quickly, and reduce the material residue on the inner wall of the mixing box, thereby improving the effective utilization rate of the material, reducing the loss caused by the material adhesion device, and solving the problem of increased costs caused by the cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a first-view stereoscopic diagram of the connection structure of the mixing box, the sub-screen and the guardrail of the present invention;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0027] Figure 4 A second perspective view of the connection structure of the mixing box, the sub-screen and the guardrail of the present invention;

[0028] Figure 5 A third perspective view of the connection structure of the mixing box, the sub-screen and the guardrail of the present invention;

[0029] Figure 6 This is a front view of the connection structure between the mixing box and the cover body of the present invention;

[0030] Figure 7 It is a schematic diagram of the transmission structure of the interior of the mixing box and the guiding material diverting frame of the present invention;

[0031] Figure 8 A three-dimensional diagram of the sub-screen and the guardrail of the present invention;

[0032] Fig. 9 It is a schematic diagram of the internal structure of the cover shell of the present invention;

[0033] Fig.10 is a three-dimensional diagram of the steering device of the present invention;

[0034] Fig.11 It is a structural stereogram of the movable door assembly of the present invention.

[0035] Description of reference numerals:

[0036] Mixing box-1; cover-2; screening and guardrail-3; outer frame-31; limit slot-32; through hole-33; mesh plate-34; conveying shaft-4; spiral conveying plate-5; support frame-6; cover-7; first motor-8; steering gear-9; transverse rotating shaft-91; longitudinal rotating shaft-92; coupling-10; conduction roller-11; first sprocket-12; second sprocket-13; chain-14; guide dial Material rack-15; steering gear-16; one-way conveying dragon-17; transmission belt-18; discharge channel-19; movable door assembly-20; shaft-201; arc-shaped pocket plate-202; second motor-203; high-pressure heating fan-21; air blowing port-22; one-way check valve-23; metal conduit-24; dividing pipe-25; cylinder-26; conduction card plate-27; shield plate-28; connecting frame-29. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] The present invention provides Figure 1-11An environmentally friendly asphalt mixing system for highway construction shown in the figure comprises a mixing box 1 and a cover 2, wherein the cover 2 is hinged at the front end position of the top of the mixing box 1, heating pipes are evenly arranged in the inner wall of the mixing box 1, a sub-screen and a guardrail 3 are arranged on the inner side of the top of the mixing box 1, and the sub-screen and the guardrail 3 are hinged at the rear end position of the top of the inner side of the mixing box 1, a conveying shaft 4 passes through the two side walls of the mixing box 1, and the conveying shaft 4 is rotatably connected to the mixing box 1, symmetrically distributed spiral conveying plates 5 are installed on both sides of the outer wall of the conveying shaft 4, and a support frame 6 is fixedly connected to the rear end side of the mixing box 1, A cover 7 is fixedly connected between one end of the support frame 6 and the mixing box 1. A first motor 8 is fixedly connected inside the cover 7. The output shaft of the first motor 8 is transmission-connected to the conveying shaft 4. A steering gear 9 is fixedly connected to the middle of the support frame 6. The steering gear 9 has a transverse rotating shaft 91 parallel to the conveying shaft 4. The other side of the steering gear 9 is provided with a longitudinal rotating shaft 92 vertically meshed with the transverse rotating shaft 91. The transverse rotating shaft 91 is installed with a conduction roller 11 through a coupling 10. The conduction roller 11 passes through the support frame 6 and extends to the inside of the cover 7. The outer side of the conveying shaft 4 is fixedly connected to the A first sprocket 12 is connected, and one end of the conduction roller 11 is fixedly connected to a second sprocket 13. The first sprocket 12 and the second sprocket 13 are connected by a chain 14. The middle end of the mixing box 1 and the position above the spiral conveyor plate 5 are rotatably connected to two parallel guide material racks 15. One end of the two guide material racks 15 are meshed with the conduction roller 11 through a steering gear 16. The steering gears 16 on both sides are symmetrically distributed about the perpendicular bisector of the steering gear 9. The middle end of the mixing box 1 and the position below the spiral conveyor plate 5 are rotatably connected. A one-way conveying dragon 17 is connected, and the one-way conveying dragon 17 penetrates the mixing box 1 and extends to the bottom of the longitudinal rotating shaft 92. The longitudinal rotating shaft 92 and the outer wall of one end of the one-way conveying dragon 17 are fixedly connected with pulleys, and the two pulleys are connected by a transmission belt 18. A discharge channel 19 is provided at a position corresponding to one end of the one-way conveying dragon 17 at the bottom of the side wall of the mixing box 1, and a movable door assembly 20 is provided on the outside of the discharge channel 19. The movable door assembly 20 is used to control the opening and closing of the discharge channel 19, so that the material can be stirred and tilted;

[0039] It also includes an auxiliary discharge component, which includes a high-pressure heating fan 21. A blowing port 22 is provided in the middle of the bottom end of the mixing box 1. A one-way check valve 23 is connected to the bottom of the blowing port 22 through a flange. The bottom end of the one-way check valve 23 is connected to the output end of the high-pressure heating fan 21 through a metal conduit 24. The one-way check valve 23 can prevent asphalt and the like from flowing down from the blowing port 22.

[0040] Furthermore, in the above technical solution, the movable door assembly 20 includes a shaft rod 201, a shaft sleeve is provided at the top of the outlet end of the discharge channel 19, and the shaft rod 201 is rotatably connected to the inside of the shaft sleeve, and arc-shaped pocket plates 202 are integrally provided at the bottom of both ends of the shaft rod 201, and the arc-shaped pocket plates 202 match the outlet end of the discharge channel 19, and a second motor 203 is fixedly connected to the outer wall of the discharge channel 19, and the output shaft of the second motor 203 is driven and connected to the shaft rod 201.

[0041] Furthermore, in the above technical solution, a dividing pipe 25 is fixedly connected to the middle position on the top of the mixing box 1, and the number of the cover body 2 and the sub-screen and the guardrail 3 is set to two groups, and the two groups of the cover body 2 and the sub-screen and the guardrail 3 are symmetrically distributed about the dividing pipe 25 axis.

[0042] Furthermore, in the above technical solution, the sub-screen and guardrail 3 includes an outer frame 31, and limiting grooves 32 are provided on both side walls inside the outer frame 31, and through holes 33 are opened on both sides of the outer frame 31 away from the limiting grooves 32, and a mesh plate 34 is movably connected to the inner side of the outer frame 31, and both sides of the mesh plate 34 are respectively slidably connected to the limiting grooves 32 on both sides, and both ends of the mesh plate 34 are respectively matched with multiple through holes 33, and the ends of the mesh plate 34 are movably connected to the through holes 33.

[0043] Furthermore, in the above technical solution, the mesh plate 34 is formed by welding stainless steel bars distributed in a grid shape, the outer end of the outer frame 31 is fixedly connected to the cylinder 26, and the connecting end of the cylinder 26 is provided with a pneumatic device for controlling the telescopic movement of the cylinder 26, the output end of the cylinder 26 is fixedly connected to the conductive card plate 27, and the other end of the conductive card plate 27 is fixedly connected to the mesh plate 34, and the output end of the cylinder 26 pulls the mesh plate 34 to reciprocate, thereby generating a screen and a shaking protective cover.

[0044] Furthermore, in the above technical solution, a controller is also included, the first motor 8 and the second motor 203 are both configured as servo motors, and the high-pressure heating fan 21, the first motor 8 and the second motor 203 are all electrically connected to the controller.

[0045] Furthermore, in the above technical solution, the number of the conduction rollers 11 is set to one or two, and a shield 28 is fixedly connected to the top of the support frame 6, and the number of the shields 28 corresponds to the conduction rollers 11. The setting of the shield 28 can protect the operation of the transmission structure.

[0046] Furthermore, in the above technical solution, a connecting frame 29 is provided at the rear end of the mixing box 1, and the connecting frame 29 is fixedly installed on the dividing pipe 25 and the supporting frame 6, and the connecting frame 29 is used to connect to the external vehicle body, so that mixing can be performed at the construction site, and it can be flexibly moved and easy to operate and use.

[0047] A mixing method of an environmentally friendly asphalt mixing system for highway construction, comprising the above-mentioned mixing device, is specifically operated as follows:

[0048] Step 1: Pour the heated and melted asphalt into the mixing box 1, control the external heater to heat the heating pipe at its active end to keep the asphalt in a fluid state, start the pneumatic device to reciprocate and retract the output end of the cylinder 26, pull the lower mesh plate 34 to reciprocate and shake under the conduction card plate 27, pour the mixed materials such as stones to be mixed from the top of the mixing box 1, and screen them under the action of the mesh plate 34 to separate larger substances;

[0049] Step 2: Start the first motor 8 through the controller so that its output end drives the conveying shaft 4 to rotate, and under the transmission action of the first sprocket 12, the second sprocket 13 and the chain 14, the conduction roller 11 rotates, and the longitudinal shaft 92 rotates under the action of the diverter 9, and the longitudinal shaft 92 rotates synchronously with the one-way conveying dragon 17 under the transmission of the transmission belt 18, pushing the material in the mixing to one side of the discharge channel 19, and the two conduction rollers 11 synchronously drive the two guide material racks 15 through the steering gear 16, and the two guide material racks 15 shift the material from the middle to both sides, and the two spiral conveying plates 5 symmetrically distributed on the conveying shaft 4 constitute a two-way conveying dragon, which transports the material to the middle section and transports it to the bottom of the guide material rack 15;

[0050] Step 3: During the mixing process, close the sub-screen, the guardrail 3 and the cover 2, and keep the mesh plate 34 shaking back and forth, so that the mesh plate 34 forms a buffer barrier to reduce the splashing and overflow of the material;

[0051] Step 4: When the mixing is sufficient and unloading is required, the second motor 203 is started by the controller to rotate its output end 90°, so that the shaft 201 rotates in the sleeve, driving the arc-shaped pocket plate 202 to rise. At this time, the outlet end of the discharge channel 19 is opened, and the material is discharged under the guidance of the rotating connection and the one-way conveying dragon 17. During the discharge, the high-pressure heating fan 21 works to generate high-temperature and high-pressure air that enters the mixing box 1 from the blowing port 22 through the metal conduit 24 and the one-way check valve 23, heats and blows, causes the material to fall quickly, and reduces the material residue on the inner wall of the mixing box 1.

[0052] Working principle of the present invention:

[0053] Refer to the instruction manual Figure 1-11When the device is in use, firstly, the heated molten asphalt is poured into the mixing box 1, and the external heater is controlled to heat the heating pipe at its action end to keep the asphalt in a fluid state, and then the sub-screen and the guardrail 3 are closed, and the pneumatic device is started to reciprocate and retract the output end of the cylinder 26, and the conductive card plate 27 pulls the lower mesh plate 34 to reciprocate and shake, and the mixed materials such as gravel mixed with the asphalt are poured from the top of the mixing box 1, and are screened under the action of the mesh plate 34 to separate larger substances, and the mixed materials are mixed with the molten asphalt, and the output end of the first motor 8 drives the conveying shaft 4 to rotate, and under the transmission action of the first sprocket 12, the second sprocket 13 and the chain 14, the conductive roller 11 rotates, and the diverter 9 is longitudinally moved. The rotating shaft 92 rotates, and the longitudinal rotating shaft 92 rotates synchronously with the one-way conveying dragon 17 under the drive of the transmission belt 18, pushing the material in the mixing to one side of the discharge channel 19, and the two guide material racks 15 are synchronously driven by the two transfer rollers 11 through the steering gear 16, and the two guide material racks 15 shift the material from the middle to both sides, and the two spiral conveying plates 5 symmetrically distributed on the conveying shaft 4 constitute a two-way conveying dragon, which transports the material to the middle section and transports it to the bottom of the guide material rack 15, thereby increasing the mixing and mixing range of the material, thereby making it more uniform. During the mixing process, the screen and the mesh plate 34 on the guardrail 3 continue to work to form a buffer barrier, reduce the splashing and overflow of the material, and reduce the material loss;

[0054] After the mixing is completed, the material is discharged. The second motor 203 is started to rotate its output end 90 degrees, so that the shaft 201 rotates in the shaft sleeve, driving the arc-shaped pocket plate 202 to rise. At this time, the outlet end of the discharge channel 19 is opened, and the material is discharged under the guidance of the rotating connection and the one-way conveying dragon 17. During the discharge, the high-pressure heating fan 21 works to generate high-temperature and high-pressure air that enters the mixing box 1 from the blowing port 22 through the metal conduit 24 and the one-way check valve 23, heats and blows, so that the material falls quickly, and reduces the material residue on the inner wall of the mixing box 1, thereby improving the effective utilization rate of the material and reducing the loss caused by the material adhesion device and the cost increase caused by the cleaning device;

[0055] The device is directly mounted on the external vehicle body and can be easily moved. As the project moves, it can realize on-site processing and manufacturing of road construction materials on the construction section, thereby reducing transportation costs, greatly improving construction efficiency, and ensuring the quality of highway construction.

[0056] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An environmentally friendly asphalt mixing system for highway construction, comprising a mixing box (1) and a cover (2), wherein the cover (2) is hinged to the front end of the top of the mixing box (1), and heating pipes are evenly arranged on the inner wall of the mixing box (1), characterized in that: A sub-screen and a guardrail (3) are provided on the inner side of the top of the mixing box (1). The sub-screen and the guardrail (3) are hinged at the rear end position of the inner top of the mixing box (1). A conveying shaft (4) passes through the two side walls of the mixing box (1), and the conveying shaft (4) is rotatably connected to the mixing box (1). Symmetrically distributed spiral conveying plates (5) are installed on both sides of the outer wall of the conveying shaft (4). A support frame (6) is fixedly connected to the rear end side of the mixing box (1). A cover shell (7) is fixedly connected between one end of the support frame (6) and the mixing box (1). The cover shell (7) is fixedly connected to the inside. A first motor (8) is connected, and an output shaft of the first motor (8) is drivingly connected to a conveying shaft (4). A steering gear (9) is fixedly connected to the middle of the support frame (6), and the steering gear (9) has a transverse rotating shaft (91) parallel to the conveying shaft (4). A longitudinal rotating shaft (92) is arranged on the other side of the steering gear (9) and is vertically meshed with the transverse rotating shaft (91). A conductive roller (11) is installed on the transverse rotating shaft (91) through a coupling (10), and the conductive roller (11) passes through the support frame (6) and then extends to the inside of the cover shell (7). The outer side of the conveying shaft (4) is fixedly connected to The first sprocket (12) is fixedly connected to the second sprocket (13) at one end of the conductive roller (11), and the first sprocket (12) and the second sprocket (13) are connected by a chain (14). The middle end of the mixing box (1) and the position above the spiral conveying plate (5) are rotatably connected to two parallel guide material racks (15). One end of the two guide material racks (15) is meshed with the conductive roller (11) through a steering gear (16), and the steering gears (16) on both sides are symmetrically distributed about the perpendicular bisector of the steering gear (9). The mixing box (1) ) is rotatably connected to a one-way conveying dragon (17) at a position located below the spiral conveying plate (5) and at an inner middle end thereof, and the one-way conveying dragon (17) penetrates the mixing box (1) and extends to the bottom of the longitudinal rotating shaft (92), the outer wall of the longitudinal rotating shaft (92) and one end of the one-way conveying dragon (17) are both fixedly connected to pulleys, and the two pulleys are connected by a transmission belt (18), and a discharge channel (19) is provided at a position corresponding to one end of the one-way conveying dragon (17) at the bottom of the side wall of the mixing box (1), and a movable door assembly (20) is provided on the outside of the discharge channel (19); It also includes an auxiliary discharge assembly, the auxiliary discharge assembly including a high-pressure heating fan (21), an air blowing port (22) is provided in the middle of the bottom end of the mixing box (1), a one-way check valve (23) is connected to the bottom of the air blowing port (22) via a flange, and the bottom end of the one-way check valve (23) is connected to the output end of the high-pressure heating fan (21) via a metal conduit (24); The movable door assembly (20) comprises a shaft rod (201), a shaft sleeve is provided at the top of the outlet end of the discharge channel (19), and the shaft rod (201) is rotatably connected to the inside of the shaft sleeve, arc-shaped pocket plates (202) are integrally provided at the bottom of both ends of the shaft rod (201), and the arc-shaped pocket plates (202) match the outlet end of the discharge channel (19), and a second motor (203) is fixedly connected to the outer wall of the discharge channel (19), and the output shaft of the second motor (203) is drivingly connected to the shaft rod (201); A split tube (25) is fixedly connected to the middle position of the top of the mixing box (1), and the number of the cover body (2) and the sub-screen and guardrail (3) is set to two groups, and the two groups of cover bodies (2) and sub-screen and guardrail (3) are symmetrically distributed about the split tube (25) axis; The sub-screen and guardrail (3) comprises an outer frame (31), and both side walls inside the outer frame (31) are provided with limit grooves (32), and through holes (33) are opened on both sides of the outer frame (31) away from the limit grooves (32), and a mesh plate (34) is movably connected to the inner side of the outer frame (31), and both sides of the mesh plate (34) are respectively slidably connected to the limit grooves (32) on both sides, and both ends of the mesh plate (34) are respectively matched with a plurality of through holes (33), and the ends of the mesh plate (34) are movably connected to the through holes (33); The mesh plate (34) is formed by welding stainless steel bars distributed in a grid shape, the outer end of the outer frame (31) is fixedly connected to a cylinder (26), and the connecting end of the cylinder (26) is provided with a pneumatic device for controlling the telescopic movement of the cylinder (26), the output end of the cylinder (26) is fixedly connected to a conductive card plate (27), and the other end of the conductive card plate (27) is fixedly connected to the mesh plate (34); It also includes a controller, wherein the first motor (8) and the second motor (203) are both configured as servo motors, and the high-pressure heating fan (21), the first motor (8) and the second motor (203) are all electrically connected to the controller; The number of the conductive rollers (11) is set to one or two, and a shielding plate (28) is fixedly connected to the top of the support frame (6), and the number of the shielding plates (28) corresponds to the number of the conductive rollers (11); The rear end of the mixing box (1) is provided with a connecting frame (29), and the connecting frame (29) is fixedly mounted on the dividing pipe (25) and the supporting frame (6), and the connecting frame (29) is used to connect to an external vehicle body; The mixing method of the environmentally friendly asphalt mixing system for highway construction comprises the following steps: Step 1: Pour the heated and molten asphalt into the mixing box (1), control the external heater so that its active end heats the heating pipe to keep the asphalt in a fluid state, start the pneumatic device to reciprocate and retract the output end of the cylinder (26), pull the lower mesh plate (34) to reciprocate and shake, pour the mixed materials such as gravel to be mixed from the top of the mixing box (1), and screen them under the action of the mesh plate (34) to separate larger substances; Step 2: start the first motor (8) through the controller so that its output end drives the conveying shaft (4) to rotate, and under the driving action of the first sprocket (12), the second sprocket (13) and the chain (14), the conduction roller (11) rotates, and under the action of the steering gear (9), the longitudinal rotating shaft (92) rotates, and under the drive of the transmission belt (18), the longitudinal rotating shaft (92) and the one-way conveying dragon (17) rotate synchronously, pushing the material in the mixing to one side of the discharge channel (19), and the two conduction rollers (11) synchronously drive two guide material shifting racks (15) through the steering gear (16), and the two guide material shifting racks (15) shift the material from the middle to the two sides, and the two spiral conveying plates (5) symmetrically distributed on the conveying shaft (4) constitute a two-way conveying dragon, and the two-way conveying dragon transports the material to the middle section, so that it is transported to the bottom of the guide material shifting rack (15); Step 3: During the mixing process, the sub-screen and the guardrail (3) and the cover (2) are closed, and the mesh plate (34) is kept shaking back and forth, so that the mesh plate (34) forms a buffer barrier to reduce splashing and overflow of the material; Step 4: When the mixing is sufficient and it is necessary to discharge the material, the second motor (203) is started by the controller to rotate its output end by 90 degrees, thereby causing the shaft (201) to rotate in the shaft sleeve, driving the arc-shaped pocket plate (202) to rise. At this time, the outlet end of the discharge channel (19) is opened, and the material is discharged under the guidance of the rotating connection and the one-way conveying dragon (17). During the discharge, the high-pressure heating fan (21) works to generate high-temperature and high-pressure air, which enters the mixing box (1) from the blowing port (22) through the metal conduit (24) and the one-way check valve (23), heats and blows the material, causing the material to fall quickly, and reducing the material residue on the inner wall of the mixing box (1).

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