Asphalt and aggregate precise proportioning conveying and mixing equipment and method for asphalt concrete

Abstract

The present invention discloses a device and method for conveying and mixing asphalt and aggregate in a precise proportion for asphalt concrete, comprising a concrete mixing drum rotatably arranged on a vehicle base and on the top thereof, and a feeding assembly arranged at the feeding end of the concrete mixing drum. The present invention relates to the technical field of asphalt concrete processing. The device and method for conveying and mixing asphalt and aggregate in a precise proportion for asphalt concrete divides the main body of the aggregate feeding assembly into a feeding bin, a metering bin, and a cylinder, and provides a sealing plate between the loading bin and the metering bin to control the discharge of aggregate from the loading bin to the metering bin. A semi-circular plate is provided in the cylinder to control the discharge of aggregate from the metering bin to the cylinder. By utilizing the linkage of a non-full gear, a rack, and a rubber band, the aggregate can be discharged into the metering bin for quantitative control and then discharged into the cylinder for discharge. Multiple aggregate raw materials can be added simultaneously in a specified proportion without weighing in advance, thereby improving the feeding efficiency and being easy to use.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt concrete processing, and in particular to a device and method for conveying and mixing asphalt and aggregate in a precise proportion of asphalt concrete. Background Art

[0002] The mixing of asphalt and aggregate in existing asphalt concrete requires the addition of multiple aggregate raw materials in specified proportions, and the various raw materials need to be weighed in advance before addition and mixing, resulting in low production efficiency. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device and method for conveying and mixing asphalt and aggregate in precise proportions for asphalt concrete.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for conveying and mixing asphalt and aggregate in precise proportions for asphalt concrete, comprising a vehicle body base and a concrete mixing drum rotatably arranged on its top, and a feeding assembly arranged at the feeding end of the concrete mixing drum, the feeding assembly comprising an aggregate feeding assembly and an asphalt feeding assembly, the aggregate feeding assembly comprising a feeding bin and a metering bin fixedly connected to the bottom of one side thereof, the inner cavities of the feeding bin and the metering bin being divided into a plurality of cavities for feeding different aggregates by a plurality of groups of first partitions and second partitions, respectively, and the ratios of the plurality of cavities in the metering bin corresponding to the different aggregate feeding ratios;

[0005] The cam is fixedly provided with a toothed plate on the bottom of the cylinder, and the toothed plate is fixedly connected to the toothed plate on the bottom of the cylinder.

[0006] When the semicircular plate rotates to completely close the bottom of the metering bin, the non-full gear starts to push the rack upward, and when the semicircular plate rotates to about to open the bottom of the metering bin, the non-full gear disengages from the rack.

[0007] Preferably, a reduction motor is fixedly connected to the bottom of the loading bin, and the output end of the reduction motor is connected to the rotating shaft through a transmission assembly. The end face of the metering bin is rotatably connected to a positioning roller on the side of the rack away from the non-full gear.

[0008] Preferably, the first partition and the second partition are both movable inside the loading bin and the metering bin, and the loading bin and the metering bin are respectively provided with a first positioning structure and a second positioning structure for limiting the positions of the first partition and the second partition;

[0009] The first positioning structure includes a flap rotatably connected to the top of one side of the upper hopper by a hinge, and the top of the outer side of the flap is fixedly connected to a top block, a threaded seat is fixedly connected to the outer side of the upper hopper and directly below the top block, and the thread of the threaded seat passes through a stud for pushing the top block, and the inner side of the flap is evenly provided with first protruding teeth that engage and position the first partition;

[0010] The second positioning structure includes a top cover arranged on the top of the metering bin, and second protruding teeth for engaging and positioning the second partition are evenly arranged on the bottom of the top cover. Both ends of the top cover are press-connected with the top of the metering bin through hooks.

[0011] Preferably, the right side of the top of the vehicle body base is fixedly connected to an asphalt storage box through a raised seat, the front top of the asphalt storage box is fixedly connected to a feeding hopper, and the front bottom of the asphalt storage box is connected to a residual material discharge valve, and the asphalt loading assembly is fixedly connected to the top of the asphalt storage box.

[0012] Preferably, the asphalt feeding assembly includes an asphalt metering box and a piston plate slidably connected thereto; a four-way valve is fixedly connected to the left side of the asphalt metering box, and an air pump is fixedly connected to the top of the asphalt metering box; the air inlet and outlet ends of the air pump are connected to the opposite ends of the four-way valve through an air suction pipe and an exhaust pipe, respectively; one end of the four-way valve is connected to the left side of the asphalt metering box through a pipeline, and the other end is connected to a filter head; a double reduction gearbox is fixedly connected to the side of the four-way valve; the input and output ends of the double reduction gearbox are fixedly connected to one end of the rotating shaft and the center of the valve plate inside the four-way valve, respectively, and the rotation speed is halved;

[0013] The right side of the asphalt metering box is connected to an extraction pipe and a discharge pipe through a one-way valve for one-way feeding and one-way discharging respectively. The bottom end of the extraction pipe passes through and extends to the bottom of the inner cavity of the asphalt storage box, and one end of the discharge pipe is fixedly connected to the side of the outlet groove.

[0014] Preferably, a support plate is provided on the top of the vehicle body base, and the concrete mixing barrel is connected to the support plate by a bracket for transverse rotation, the right side of the bottom of the support plate is rotatably mounted on the raised seat through an arc seat, a spring is pressed between the left side of the bottom of the support plate and the top of the vehicle body base, and the top of the vehicle body base is rotatably connected to the side surface of the left bracket with a hydraulic cylinder.

[0015] Preferably, a gate valve is installed on one side of the left end of the concrete mixing barrel, a rotating rod is connected to the middle of the left end of the concrete mixing barrel for transverse rotation, and the rotating rod and the end of the screw rod of the gate valve are engaged with each other through a pair of bevel gears for transmission, one end of the rotating rod is fixedly connected to a crank handle, a frame supporting the rotating rod is fixedly connected between the top of the gate valve and the end face of the concrete mixing barrel, a drive motor is fixedly connected to the right side of the top of the support plate, and the output end of the drive motor drives the right end of the concrete mixing barrel through a pulley assembly.

[0016] Preferably, the left side of the asphalt storage box is fixedly connected to a feed pipe that passes through the interior of the concrete mixing barrel, and the bottom right side of the outlet trough extends downward and is fixedly connected to the top of the feed pipe. The external fixed sleeve of one end of the feed pipe located inside the asphalt storage box is provided with a spherical sleeve. The interior of the right end of the asphalt storage box is configured as a spherical structure that matches the spherical sleeve, and the axis of the arc surface at the bottom of the arc seat is coaxial with the center of the spherical sleeve.

[0017] The present invention also discloses a method for conveying and mixing asphalt and aggregate in an accurate proportion for asphalt concrete, which specifically comprises the following steps:

[0018] S1. Aggregate loading: Add crushed stone, stone chips, mineral powder, and sand, and use the aggregate loading component to add them in the specified proportions according to the volume ratio multiple times;

[0019] S2. Asphalt loading: According to the corresponding ratio, while adding aggregate, extract asphalt in multiple times and discharge it into the concrete mixing drum together with the aggregate;

[0020] S3. Mixing raw materials: Start the equipment to drive the concrete mixing drum to mix the aggregate and asphalt;

[0021] S4. Asphalt concrete discharge: After mixing is completed, open the gate valve on the side of the concrete mixing barrel and tilt the concrete mixing barrel to discharge the asphalt concrete.

[0022] Preferably, the aggregate components are mixed in volume ratio, and the aggregate is mixed with the asphalt in weight ratio after conversion through Marshall density.

[0023] Beneficial effects

[0024] The present invention provides a device and method for conveying and mixing asphalt and aggregate in a precise ratio for asphalt concrete. Compared with the prior art, it has the following advantages:

[0025] (1) The asphalt and aggregate precise proportioning conveying and mixing equipment and method of asphalt concrete are as follows: the main body of the aggregate feeding component is divided into a feeding bin, a metering bin and a cylinder, and a sealing plate is set between the feeding bin and the metering bin to control the discharge of aggregate from the feeding bin to the metering bin, and a semi-circular arc plate is set in the cylinder to control the discharge of aggregate from the metering bin to the cylinder. By utilizing the linkage of non-full gears, racks and rubber bands, the aggregate can be discharged into the metering bin for quantitative control and then discharged into the cylinder for discharge. A variety of aggregate raw materials can be added at the same time according to the specified proportion without weighing in advance, thereby improving the feeding efficiency and being easy to use.

[0026] (2) The asphalt and aggregate precise proportioning conveying and mixing equipment and method of the asphalt concrete, by setting a first positioning structure and a second positioning structure on the feeding bin and the metering bin to limit the position of the first partition and the second partition, can divide the inner cavity of the feeding bin and the metering bin into cavities of different proportions according to the aggregate raw material ratio of different asphalt concrete, can quickly carry out proportioning, and can adjust the first positioning structure and the second positioning structure to quickly and conveniently fix all the first partitions and the second partitions, which is simple and convenient to operate.

[0027] (3) The asphalt and aggregate precise proportioning conveying and mixing equipment and method of the asphalt concrete, the asphalt feeding component pumps out asphalt for feeding by means of piston negative pressure extraction, which is convenient for quantitative control of feeding, and the exhaust direction is controlled by a four-way valve, and the valve plate of the four-way valve is connected to the rotating shaft. While the rotating shaft controls the discharge of aggregate, the switching of the four-way valve can be controlled synchronously. During the switching process of the four-way valve, an air pump can realize the continuous action of extracting and discharging the asphalt metering box, without the need for additional power, and can realize linkage coordination, so that there will be no error in the ratio of aggregate and asphalt due to time difference.

[0028] (4) The asphalt and aggregate precise proportioning conveying and mixing equipment and method of the asphalt concrete are characterized by rotatably setting the support plate for the concrete mixing barrel on the vehicle body base and driving it with a cylinder so that the concrete mixing barrel can be deflected as a whole, thereby facilitating and better pouring out the asphalt concrete inside. The feed pipe for adding raw materials into the concrete mixing barrel is rotatably connected to the spherical sleeve, which not only does not affect the axial rotation of the concrete mixing barrel itself, but also does not affect the connection when it is tilted. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the overall structure of the present invention;

[0030] Figure 2 It is a side view of the aggregate feeding assembly of the present invention;

[0031] Figure 3 is a side sectional view of the aggregate feeding assembly of the present invention;

[0032] Figure 4 This is a schematic structural diagram of the rack, semicircular plate and non-full gear of the present invention;

[0033] Figure 5 A three-dimensional diagram of the sealing plate and the rack of the present invention;

[0034] Figure 6 For the present invention Figure 3 A partial enlarged view of point A in the middle;

[0035] Figure 7 is a three-dimensional diagram of the top cover and the second partition of the present invention;

[0036] Figure 8 This is a schematic structural diagram of the asphalt loading assembly of the present invention;

[0037] Figure 9 is a cross-sectional view of an asphalt metering box of the present invention;

[0038] Figure 10 is a side sectional view of the four-way valve of the present invention;

[0039] Figure 11 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0040] Figure 12 This is a cross-sectional view of the connection between the concrete mixing barrel and the feed pipe of the present invention.

[0041] In the figure: 1-body base, 2-concrete mixing barrel, 3-aggregate feeding assembly, 31-feeding bin, 32-metering bin, 33-first partition, 34-second partition, 35-sealing plate, 36-rack, 37-cylinder, 38-rotating shaft, 39-semicircular plate, 310-non-full gear, 311-positioning sleeve, 312-rubber band, 313-export groove, 314-reduction motor, 315-positioning roller, 316-flip plate, 317-top block, 318-threaded seat, 319-stud, 320-first convex tooth, 321-top cover, 322-second convex Gear, 323-hook, 4-asphalt feeding assembly, 41-asphalt metering box, 42-piston plate, 43-four-way valve, 44-air pump, 45-exhaust pipe, 46-exhaust pipe, 47-filter head, 48-double reduction box, 49-valve plate, 410-extraction pipe, 411-discharge pipe, 5-raised seat, 6-asphalt storage box, 7-feeding hopper, 8-support plate, 9-bracket, 10-arc seat, 11-spring, 12-hydraulic cylinder, 13-gate valve, 14-rotating rod, 15-bevel gear, 16-drive motor, 17-feed pipe, 18-spherical sleeve. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] The present invention provides four technical solutions:

[0044] Figure 1-4 The first embodiment is shown: a device for conveying and mixing asphalt and aggregate in a precise ratio for asphalt concrete, comprising a vehicle body base 1 and a concrete mixing drum 2 rotatably mounted on its top, and a feeding assembly disposed at the feed end of the concrete mixing drum 2, the feeding assembly comprising an aggregate feeding assembly 3 and an asphalt feeding assembly 4. The aggregate feeding assembly 3 comprises a feeding bin 31 and a metering bin 32 fixedly connected to the bottom of one side thereof. The inner cavities of the feeding bin 31 and the metering bin 32 are respectively divided into multiple cavities for charging different aggregates by multiple groups of first partitions 33 and second partitions 34, and the ratios of the multiple cavities in the metering bin 32 correspond to different aggregate charging ratios.

[0045] The top of the cylinder 37 is fixedly connected to a guide groove 313 with a guide groove 314 on the bottom surface of the cylinder 37.

[0046] When the semicircular plate 39 rotates to completely close the bottom of the metering bin 32 , the non-full gear 310 starts to push the rack 36 upward. When the semicircular plate 39 rotates to about to open the bottom of the metering bin 32 , the non-full gear 310 disengages from the rack 36 .

[0047] A reduction motor 314 is fixedly connected to the bottom of the loading bin 31, and the output end of the reduction motor 314 is connected to the rotating shaft 38 through a transmission assembly. The end face of the metering bin 32 is located on the side of the rack 36 away from the non-full gear 310 and is rotatably connected to a positioning roller 315. The end face of the metering bin 32 is also provided with a protective cover covering the non-full gear 310.

[0048] By dividing the main body of the aggregate feeding component 3 into a feeding bin 31, a metering bin 32 and a cylinder 37, and arranging a sealing plate 35 between the feeding bin 31 and the metering bin 32 to control the discharge of aggregate from the feeding bin 31 to the metering bin 32, and arranging a semicircular arc plate 39 in the cylinder 37 to control the discharge of aggregate from the metering bin 32 to the cylinder 37, and utilizing the linkage cooperation of the non-full gear 310, the rack 36 and the rubber band 312, the aggregate can be discharged into the metering bin 32 for quantitative control, and then discharged into the cylinder 37 for discharge. A variety of aggregate raw materials can be added at the same time according to the specified proportion without weighing in advance, thereby improving the feeding efficiency and facilitating use.

[0049] Figure 2-3 5-7 show a second embodiment, which differs from the first embodiment mainly in that the first partition 33 and the second partition 34 are both translatably movable inside the loading bin 31 and the metering bin 32, and the loading bin 31 and the metering bin 32 are respectively provided with a first positioning structure and a second positioning structure for limiting the positions of the first partition 33 and the second partition 34;

[0050] The first positioning structure includes a flap 316 rotatably connected to the top of one side of the upper bin 31 by a hinge, and a top block 317 is fixedly connected to the top of the outer side of the flap 316. A threaded seat 318 is fixedly connected to the outer side of the upper bin 31 and located directly below the top block 317. The thread of the threaded seat 318 passes through a stud 319 that pushes the top block 317. First protruding teeth 320 are evenly arranged on the inner side of the flap 316 to engage with and position the first partition 33. The position where the first partition 33 engages with the first protruding teeth 320 is set as a conical surface;

[0051] The second positioning structure includes a top cover 321 that is arranged on the top of the metering bin 32, and the bottom of the top cover 321 is evenly provided with second protruding teeth 322 that engage and position the second partition 34. The position where the second partition 34 and the second protruding teeth 322 engage is set as a conical surface. Both ends of the top cover 321 are crimped to the top of the metering bin 32 through a hook 323. Scale lines are set on the side of the top cover 321 to facilitate control of the moving position of the second partition 34.

[0052] The edges of the first partition plate 33 and the second partition plate 34 except the top are provided with anti-slip sealing strips.

[0053] By setting the first positioning structure and the second positioning structure on the loading bin 31 and the metering bin 32 to limit the position of the first partition 33 and the second partition 34, the inner cavity of the loading bin 31 and the metering bin 32 can be divided into cavities of different proportions according to the aggregate raw material ratio of different asphalt concretes, and rapid proportioning can be performed. By adjusting the first positioning structure and the second positioning structure, all the first partitions 33 and the second partitions 34 can be fixed quickly and conveniently, and the operation is simple and convenient.

[0054] Figure 1 and8 -10 shows a third embodiment, the main difference from the second embodiment is that an asphalt storage box 6 is fixedly connected to the right side of the top of the vehicle body base 1 through a raised seat 5, a feeding hopper 7 is fixedly connected to the front top of the asphalt storage box 6, and a residual material discharge valve is connected to the front bottom of the asphalt storage box 6, and the asphalt loading assembly 4 is fixedly connected to the top of the asphalt storage box 6.

[0055] The asphalt feeding assembly 4 includes an asphalt metering box 41 and a piston plate 42 slidably connected thereto. A four-way valve 43 is fixedly connected to the left side of the asphalt metering box 41, and an air pump 44 is fixedly connected to the top of the asphalt metering box 41. The air inlet and outlet ends of the air pump 44 are connected to the opposite ends of the four-way valve 43 through an air suction pipe 45 and an exhaust pipe 46, respectively. One end of the four-way valve 43 is connected to the left side of the asphalt metering box 41 through a pipeline, and the other end is connected to a filter head 47. A double reduction gearbox 48 is fixedly connected to the side of the four-way valve 43. The input and output ends of the double reduction gearbox 48 are fixedly connected to one end of the rotating shaft 38 and the center of the valve plate 49 inside the four-way valve 43, respectively, and the speed is halved.

[0056] The right side of the asphalt metering box 41 is connected to an extraction pipe 410 and a discharge pipe 411 through a one-way valve for one-way feeding and one-way discharging respectively. The bottom end of the extraction pipe 410 passes through and extends to the bottom of the inner cavity of the asphalt storage box 6, and one end of the discharge pipe 411 is fixedly connected to the side of the outlet groove 313.

[0057] The asphalt feeding component 4 extracts and discharges asphalt for feeding by means of piston negative pressure extraction, which is convenient for quantitative control of feeding, and the direction of exhaust and extraction is controlled by the four-way valve 43, and the valve plate 49 of the four-way valve 43 is connected to the rotating shaft 38. While the rotating shaft 38 controls the discharge of aggregate, the switching of the four-way valve 43 can be synchronously controlled. During the switching process of the four-way valve 43, an air pump 44 can realize the continuous extraction and discharge of the asphalt metering box 41, without the need for additional power, and can achieve linkage coordination, so that there will be no error in the ratio of aggregate and asphalt due to time difference.

[0058] Figure 1 and 11 -12 shows a fourth embodiment, which mainly differs from the third embodiment in that: a support plate 8 is provided on the top of the vehicle body base 1, and the concrete mixing barrel 2 is laterally rotatably connected to the support plate 8 through a bracket 9, a roller is provided on the inner side of the bracket 9, and a ring groove adapted to the roller is provided on the surface of the concrete mixing barrel 2 for positioning, the right side of the bottom of the support plate 8 is rotatably mounted on the raised seat 5 through an arc seat 10, a spring 11 is pressed between the left side of the bottom of the support plate 8 and the top of the vehicle body base 1, and the top of the vehicle body base 1 and the side of the left bracket 9 are rotatably connected to the hydraulic cylinder 12.

[0059] A gate valve 13 is installed on one side of the left end of the concrete mixing barrel 2. A rotating rod 14 is connected to the middle of the left end of the concrete mixing barrel 2 for horizontal rotation, and the rotating rod 14 and the end of the screw rod of the gate valve 13 are engaged and transmitted through a pair of bevel gears 15. One end of the rotating rod 14 is fixedly connected to a crank handle, and a frame supporting the rotating rod 14 is fixedly connected between the top of the gate valve 13 and the end face of the concrete mixing barrel 2. A drive motor 16 is fixedly connected to the right side of the top of the support plate 8, and the output end of the drive motor 16 drives the right end of the concrete mixing barrel 2 through a pulley assembly.

[0060] The left side of the asphalt storage box 6 is fixedly connected to a feed pipe 17 that passes through the interior of the concrete mixing barrel 2, and the bottom right side of the outlet groove 313 extends downward and is fixedly connected to the top of the feed pipe 17. The external fixed sleeve of one end of the feed pipe 17 located inside the asphalt storage box 6 is provided with a spherical sleeve 18. The interior of the right end of the asphalt storage box 6 is set to a spherical structure that is compatible with the spherical sleeve 18, and the axis of the arc surface at the bottom of the arc seat 10 is coaxial with the center of the spherical sleeve 18.

[0061] By rotatably arranging the support plate 8 supporting the concrete mixing drum 2 on the vehicle body base 1 and driving it with a cylinder, the entire supporting concrete mixing drum 2 can be deflected, thereby facilitating and better pouring out the asphalt concrete inside. The feed pipe 17 for adding raw materials into the concrete mixing drum 2 is rotatably connected to it through a spherical sleeve 18, which not only does not affect the axial rotation of the concrete mixing drum 2 itself, but also does not affect the connection when it is tilted.

[0062] The present invention also discloses a method for conveying and mixing asphalt and aggregate in an accurate proportion for asphalt concrete, which specifically comprises the following steps:

[0063] S1. Aggregate loading: Add crushed stone, stone chips, mineral powder, and sand, and use the aggregate loading component 3 to add them in a specified proportion multiple times according to the volume ratio;

[0064] S2. Asphalt loading: According to the corresponding ratio, while adding aggregate, extract asphalt in multiple times and discharge it into the concrete mixing drum 2 together with the aggregate;

[0065] S3, mixing raw materials: start the equipment to drive the concrete mixing drum 2 to rotate and mix the aggregate and asphalt;

[0066] S4. Asphalt concrete discharge: After the mixing is completed, the side gate valve 13 of the concrete mixing barrel 2 is opened and the concrete mixing barrel 2 is tilted to discharge the asphalt concrete.

[0067] The aggregate components are proportioned by volume, and the aggregate is proportioned with asphalt by weight after conversion through Marshall density.

[0068] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0069] When adjusting the first partition 33, first loosen the stud 319, turn the flap 316 open, then move the first partition 33 to a suitable position, then rotate the flap 316 to press and fix the first partition 33, and then rotate the stud 319 to push the push block 317 to indirectly push the flap 316 to press the first partition 33.

[0070] When adjusting the second partition 34, first open the hook 323 to open the top cover 321, then move the second partition 34 to the position corresponding to the second partition 34, then press the second partition 34 on the top of the first partition 33, and fasten it with the hook 323 on both sides.

[0071] When loading aggregate, the raw materials are poured into the loading bin 31, and the reduction motor 314 is started to drive the rotating shaft 38 to rotate through the transmission assembly, thereby driving the semi-circular plate 39 and the non-full gear 310 to rotate. When the non-full gear 310 is engaged with the rack 36, it can push it and the sealing plate 35 to rise, thereby opening the outlet of the loading bin 31, allowing the raw materials to enter the metering bin 32. When the non-full gear 310 is disengaged from the rack 36, it descends under the tension of the rubber band 312 and the gravity of the sealing plate 35, and closes the outlet of the loading bin 31; during the rotation of the semi-circular plate 39, the operation of intermittently opening and closing the bottom of the metering bin 32 can be realized, so that the raw materials in the metering bin 32 fall into the cylinder 37, and then are discharged as a whole through the guide groove 313.

[0072] Asphalt is poured into the asphalt storage box 6 through the feeding hopper 7. When the asphalt is loaded, the air pump 44 extracts the air in the four-way valve 43 through the exhaust pipe 45, and then extracts the air in the asphalt metering box 41 through the pipeline, causing the piston plate 42 to move to the left to generate negative pressure, so that the extraction pipe 410 extracts the asphalt in the asphalt storage box 6. When the rotating shaft 38 drives the valve plate 49 to rotate 90° through the double reduction box 48 to change the direction of the internal flow channel, the air extracted by the air pump 44 enters from the filter head 47, and the exhausted air is discharged into the asphalt metering box 41 through the four-way valve 43 and the pipeline, pushing the piston plate 42 to move to the right, and the asphalt is discharged into the outlet groove 313 through the discharge pipe 411 and added into the concrete mixing barrel 2 together with the aggregate.

[0073] During the mixing process, the drive motor 16 is started to rotate the concrete mixing barrel 2 through the pulley assembly to mix the raw materials inside. After the mixing is completed, the drive motor 16 is turned off, the gate valve 13 is controlled to be at the bottom, and then the handle is manually shaken to drive the rotating rod 14 to rotate, and the bevel gear 15 is used to drive the screw rod in the gate valve 13 to rotate, thereby driving the internal gate plate to rise and open the discharge port of the concrete mixing barrel 2. Then, the hydraulic cylinder 12 is controlled to contract, so that the left side of the concrete mixing barrel 2 is lowered, and the asphalt concrete inside is poured out.

[0074] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for conveying and mixing asphalt and aggregate in a precise proportion for asphalt concrete, comprising a vehicle base and a concrete mixing drum rotatably mounted on its top, and a loading assembly mounted at the feed end of the concrete mixing drum, characterized in that: The feeding assembly includes an aggregate feeding assembly and an asphalt feeding assembly. The aggregate feeding assembly includes a feeding bin and a metering bin fixedly connected to the bottom of one side thereof. The inner cavities of the feeding bin and the metering bin are respectively divided into multiple cavities for feeding different aggregates by multiple groups of first partitions and second partitions, and the ratios of the multiple cavities in the metering bin correspond to different aggregate feeding ratios. The cam is fixedly provided with a toothed plate on the bottom of the cylinder, and the toothed plate is fixedly connected to the toothed plate on the bottom of the cylinder. When the semicircular plate rotates to completely close the bottom of the metering bin, the non-full gear starts to push the rack upward, and when the semicircular plate rotates to about to open the bottom of the metering bin, the non-full gear disengages from the rack; The asphalt feeding assembly includes an asphalt metering box and a piston plate slidably connected thereto; a four-way valve is fixedly connected to the left side of the asphalt metering box, and an air pump is fixedly connected to the top of the asphalt metering box; the air inlet and outlet ends of the air pump are connected to the opposite ends of the four-way valve through an air suction pipe and an exhaust pipe, respectively; one end of the four-way valve is connected to the left side of the asphalt metering box through a pipeline, and the other end is connected to a filter head; a double reduction gearbox is fixedly connected to the side of the four-way valve; the input and output ends of the double reduction gearbox are fixedly connected to one end of the rotating shaft and the center of the valve plate inside the four-way valve, respectively, and the rotation speed is halved; The right side of the top of the vehicle body base is fixedly connected to an asphalt storage box through a raised seat, the front top of the asphalt storage box is fixedly connected to a feeding hopper, and the front bottom of the asphalt storage box is connected to a residual material discharge valve, and the asphalt feeding assembly is fixedly connected to the top of the asphalt storage box; The right side of the asphalt metering box is connected to an extraction pipe and a discharge pipe through a one-way valve for one-way feeding and one-way discharging respectively. The bottom end of the extraction pipe passes through and extends to the bottom of the inner cavity of the asphalt storage box, and one end of the discharge pipe is fixedly connected to the side of the outlet groove.

2. The asphalt and aggregate precise proportioning conveying and mixing equipment for asphalt concrete according to claim 1, characterized in that: A reduction motor is fixedly connected to the bottom of the loading bin, and the output end of the reduction motor is transmission-connected to the rotating shaft through a transmission assembly. The end face of the metering bin is rotationally connected to a positioning roller on the side of the rack away from the non-full gear.

3. The asphalt and aggregate precise proportioning conveying and mixing equipment for asphalt concrete according to claim 1, characterized in that: The first partition and the second partition are both movable inside the loading bin and the metering bin, and the loading bin and the metering bin are respectively provided with a first positioning structure and a second positioning structure for limiting the positions of the first partition and the second partition; The first positioning structure includes a flap rotatably connected to the top of one side of the upper hopper by a hinge, and the top of the outer side of the flap is fixedly connected to a top block, a threaded seat is fixedly connected to the outer side of the upper hopper and directly below the top block, and the thread of the threaded seat passes through a stud for pushing the top block, and the inner side of the flap is evenly provided with first protruding teeth that engage and position the first partition; The second positioning structure includes a top cover arranged on the top of the metering bin, and second protruding teeth for engaging and positioning the second partition are evenly arranged on the bottom of the top cover. Both ends of the top cover are press-connected with the top of the metering bin through hooks.

4. The asphalt and aggregate precise proportioning conveying and mixing equipment for asphalt concrete according to claim 1, characterized in that: A support plate is provided on the top of the vehicle body base, and the concrete mixing barrel is connected to the support plate by a bracket for transverse rotation. The right side of the bottom of the support plate is rotatably mounted on the raised seat through an arc seat. A spring is pressed between the left side of the bottom of the support plate and the top of the vehicle body base. The top of the vehicle body base is rotatably connected to the side surface of the left bracket with a hydraulic cylinder.

5. The asphalt and aggregate precise proportioning conveying and mixing equipment for asphalt concrete according to claim 1, characterized in that: A gate valve is installed on one side of the left end of the concrete mixing barrel, and a rotating rod is connected to the middle of the left end of the concrete mixing barrel for horizontal rotation, and the rotating rod and the end of the screw rod of the gate valve are engaged with each other through a pair of bevel gears for transmission. One end of the rotating rod is fixedly connected to a crank handle, and a frame supporting the rotating rod is fixedly connected between the top of the gate valve and the end face of the concrete mixing barrel. A driving motor is fixedly connected to the right side of the top of the support plate, and the output end of the driving motor drives the right end of the concrete mixing barrel through a pulley assembly.

6. The asphalt and aggregate precise proportioning conveying and mixing equipment for asphalt concrete according to claim 4, characterized in that: The left side of the asphalt storage box is fixedly connected to a feed pipe that penetrates into the interior of the concrete mixing barrel, and the bottom right side of the outlet groove extends downward and is fixedly connected to the top of the feed pipe. The external fixed sleeve of one end of the feed pipe located inside the asphalt storage box is provided with a spherical sleeve. The interior of the right end of the asphalt storage box is set as a spherical structure adapted to the spherical sleeve, and the axis center of the arc surface at the bottom of the arc seat is coaxial with the center of the spherical sleeve.

Images