An automatic material preparation machine

Abstract

The application relates to an automatic material taking machine and relates to the technical field of material taking machines. The automatic material taking machine comprises a tank body, a pair of flow guide plates are fixedly arranged in the tank body, the two flow guide plates are oppositely arranged, the flow guide plates separate the inside of the tank body into an upper cavity and a lower cavity, a communication hole is arranged through the inner top wall of the tank body, a lifting plate is inserted into the communication hole, a stirring assembly is arranged on the lifting plate, a discharging hole is left between the two flow guide plates, an opening and closing assembly for opening or closing the discharging hole is arranged between the lifting plate and the tank body, a lower scraping assembly is arranged in the upper cavity, and a blowing-off assembly is arranged on the flow guide plate. The application has the effect of cleaning residual asphalt mixture.

Description

Technical Field

[0001] This application relates to the field of material handling machines, and more particularly to an automatic material handling machine. Background Technology

[0002] The basic concept of the Marshall Test was first proposed by Bruce Marshall of the Mississippi Highway Bureau around 1939, and was later further refined by the U.S. Army. During World War II, the U.S. Army Corps of Engineers (USCOE) began evaluating different hot-mix asphalt (HMA) design methods for use in military airfield pavement design.

[0003] The Marshall test is used to determine the optimal asphalt-aggregate ratio for asphalt mixtures. The test involves standard compaction of specimens under specified temperature and humidity conditions, measuring the stability and flow value of the asphalt mixture, and then plotting curves showing the relationship between the asphalt-aggregate ratio and stability, flow value, density, porosity, and saturation. Finally, the optimal asphalt-aggregate ratio is determined. Currently, both domestically and internationally, Marshall tests are typically conducted using electromechanical mixing and manual sampling, which allows for a relatively objective and accurate evaluation of asphalt mixture performance.

[0004] In related technologies, Chinese Patent No. CN204286901U discloses an automatic material preparation and extraction machine for Marshall testing. This machine includes a computer, a container, an automatic heating and insulation system, an automatic vertically retractable agitator, and a distributor. The automatic heating and insulation system, the automatic vertically retractable agitator, and the distributor are all mounted on the container. The computer controls and connects to these components. After dispensing, the automatic material preparation and extraction machine places an equal number of Marshall sample molds below the container according to the number of portions. It then activates the corresponding automatic discharge device, automatically outputting the asphalt mixture from the sub-container in the container and depositing it into the corresponding Marshall sample mold. This automatic material preparation and extraction machine overcomes the problems of large individual differences, poor stability, and unevenness in Marshall test samples caused by subjective and objective factors such as human error and materials. It is highly suitable for mixing and extracting asphalt mixtures in Marshall tests, minimizing the impact of human error and material factors on the objectivity and accuracy of the Marshall test results.

[0005] The inventors discovered at least the following problems with this technology: After the material is divided, the asphalt mixture is transported to the Marshall sample mold by an automatic discharge device. At this time, the asphalt mixture remains on the inner wall of the container, which not only easily leads to waste of the asphalt mixture, but also causes a certain error in the quality of a single batch. Summary of the Invention

[0006] To address the issue of asphalt mixture residue adhering to the inner wall of the container, which not only leads to waste but also causes errors in the quality of individual portions, this application provides an automatic feeder.

[0007] The automatic material preparation and dispensing machine provided in this application adopts the following technical solution:

[0008] An automatic material handling machine includes a tank. A pair of guide plates are fixedly installed inside the tank. The two guide plates are arranged opposite each other and divide the interior of the tank into an upper cavity and a lower cavity. A through hole is provided through the inner top wall of the tank. A lifting plate is inserted into the through hole. A stirring assembly is provided on the lifting plate. A discharge hole is provided between the two guide plates. An opening and closing assembly for opening or closing the discharge hole is provided between the lifting plate and the tank. A scraping assembly is provided in the upper cavity. A blowing assembly is provided on the guide plates.

[0009] By adopting the above technical solution, after the last batch of asphalt mixture is delivered into the lower cavity, the scraper assembly and the blow-off assembly are activated. The scraper assembly can scrape off the asphalt mixture remaining on the inner wall of the upper cavity; the blow-off assembly can blow off the asphalt mixture remaining on the guide plate and the residual asphalt mixture that the scraper assembly in the upper cavity could not scrape off. It can also blow air onto the stopper plate to a certain extent, thereby blowing off the asphalt mixture remaining on the stopper plate. After the scraper assembly finishes scraping the inner wall of the upper cavity, the scraper assembly can extend to the guide plate and scrape the asphalt mixture that has fallen from the inner wall of the upper cavity to the top of the guide plate and the asphalt mixture remaining on the top of the guide plate to the discharge hole so that it can fall into the lower cavity. This ensures the quality of the last batch of asphalt mixture and prevents waste caused by asphalt mixture sticking to the wall.

[0010] Optionally, the stirring assembly includes a stirring shaft, stirring blades, and a stirring motor. The stirring shaft is rotatably mounted on the bottom wall of the lifting plate, the stirring motor is mounted on the top wall of the lifting plate and drives the stirring shaft to rotate, and the stirring blades are fixed to the stirring shaft.

[0011] By adopting the above technical solution, after the raw materials such as asphalt, aggregates, and admixtures are fed into the upper cavity of the tank, the mixing motor is started to drive the mixing shaft to rotate the mixing blades, thereby mixing the asphalt mixture in the upper cavity to achieve thorough mixing.

[0012] Optionally, the lower scraper assembly includes a lower scraper portion and an extension portion, wherein the lower scraper portion is connected to the tank body and located within the upper cavity, and the extension portion is connected to the lower scraper portion;

[0013] The lower scraper includes a lower scraper ring rod and a lower scraper electric push rod. The lower scraper electric push rod is installed on the top wall of the tank and its push shaft is fixed to the lower scraper ring rod. The lower scraper ring rod is located in the upper cavity and abuts against the inner wall of the upper cavity. The extension is fixed to the lower scraper ring rod.

[0014] By adopting the above technical solution, after the last batch of asphalt mixture is delivered into the lower cavity, the electric push rod of the lower scraper is activated to push the lower scraper ring rod to move downward in the vertical direction, thereby scraping off the asphalt mixture remaining on the inner wall of the upper cavity; and during the process of the lower scraper ring rod scraping the inner wall of the upper cavity, the extension can pre-scrape the inner wall of the upper cavity, thereby improving the quality of scraping the inner wall of the upper cavity.

[0015] Optionally, the extension includes a connecting rod and a cleaning rod. One end of the connecting rod is hinged to the bottom of the lower scraper ring rod, and the other end is fixed to the cleaning rod. The cleaning rod has a guide surface on the side near the inner wall of the tank.

[0016] By adopting the above technical solution, as the lower scraper ring rod moves downwards vertically, the cleaning rod will also move downwards vertically. After the cleaning rod reaches the guide plate, it will rotate through its own guide surface to scrape the asphalt mixture remaining on the guide plate.

[0017] Optionally, the opening and closing assembly includes a stopper plate and an electric push rod for opening and closing. The electric push rod for opening and closing is installed on the top wall of the tank and the push shaft is fixedly connected to the top wall of the lifting plate. The end of the stirring shaft away from the stirring motor is rotatably connected to the top of the stopper plate. The stopper plate is inserted into the discharge hole.

[0018] By adopting the above technical solution, after the asphalt mixture is mixed, the electric actuator is activated to move the lifting plate vertically downwards. At this time, the stopper plate will slowly open the discharge hole, so that the asphalt mixture in the upper cavity will continuously fall into the lower cavity. According to the required number of portions, when the single portion mass is about to be reached, the electric actuator is activated again to move the lifting plate vertically upwards. At this time, the stopper plate will slowly close the discharge hole. During the closing process, the opening amount of the discharge hole can be continuously reduced so that the amount of falling material is reduced slowly, thereby enabling more precise control of the single portion mass until the discharge hole is completely closed.

[0019] Optionally, the blow-off assembly includes fan blades, a baffle net, and a drive motor. The guide plate has a cavity inside, and the side wall and top wall of the guide plate are provided with blow-off holes that are connected to the cavity. The baffle net is fixed to the side wall and top wall of the guide plate. The drive motor is mounted on the guide plate and drives the fan blades to rotate. The fan blades are located inside the cavity.

[0020] By adopting the above technical solution, after the last batch of asphalt mixture is delivered into the downward cavity, the drive motor is started to drive the fan blades to rotate, and then blow off the asphalt mixture remaining on the guide plate through the blow-off holes. The baffle net is fixed to the top and side walls of the guide plate to cover the blow-off holes, so that the asphalt mixture is not easily allowed to enter the cavity from the blow-off holes.

[0021] Optionally, a weighing assembly is provided in the lower cavity, and a plurality of ejection holes are provided through the side wall of the tank. The weighing assembly is provided with an ejection component for ejecting the asphalt mixture, and the side wall of the tank is provided with a scraping component for scraping the ejection component.

[0022] By adopting the above technical solution, asphalt mixture is fed into the downward cavity and falls onto the weighing component. Feeding stops when the weighing component moves to be flush with the inner bottom of the ejection hole near the guide plate or to be flush with the inner bottom of the ejection hole away from the guide plate. Then, the Marshall sample mold is placed at the ejection hole, and the ejection component is activated. The ejection component ejects the asphalt mixture on the weighing component from the ejection hole, and the asphalt mixture falls into the Marshall sample mold. Finally, during the retraction of the ejection component, the scraping component is activated to scrape the ejection component, so that asphalt mixture is not easily left on the ejection component, and the scraped asphalt mixture still falls into the Marshall sample mold.

[0023] Optionally, the weighing assembly includes a weighing plate and a weighing spring. One end of the weighing spring is fixed to the inner bottom wall of the tank and the other end is fixed to the bottom wall of the weighing plate. The bottom of the weighing plate is flush with the inner top of the ejection hole near one end of the guide plate.

[0024] By adopting the above technical solution, as asphalt mixture is continuously fed into the lower cavity, the asphalt mixture falls onto the weighing plate, and the weighing plate is continuously pressed down and moved until the weighing plate moves to be level with the inner bottom of the ejection hole near the guide plate or moves to be level with the inner bottom of the ejection hole away from the guide plate, and then the feeding stops.

[0025] Optionally, the weighing assembly further includes a vibration motor, which is fixedly mounted on the bottom wall of the load-bearing plate.

[0026] By adopting the above technical solution, when the asphalt mixture falls onto the weighing plate, the vibration motor can be activated to make the weighing plate vibrate, so that the asphalt mixture on the top of the weighing plate does not accumulate too high and can be slowly spread on the weighing plate.

[0027] Optionally, the ejection assembly includes a scraper, a counterweight, and an electric ejection rod. A clearance hole is provided through the side of the tank away from the ejection hole. The electric ejection rod is fixed to the top wall of the weighing plate and passes through the clearance hole. The push shaft of the electric ejection rod is fixed to the scraper. The counterweight is fixed to the bottom wall of the weighing plate away from the electric ejection rod.

[0028] By adopting the above technical solution, after the weighing plate has moved, the electric push rod is activated to push the scraper towards the ejection hole, thereby pushing the asphalt mixture on the weighing plate out of the ejection hole. The scraper can extend out of the ejection hole to ensure that the asphalt mixture is completely scraped.

[0029] In summary, this application includes at least one of the following beneficial effects:

[0030] 1. After the scraper assembly finishes scraping the inner wall of the upper cavity, the scraper assembly can extend to the guide plate and scrape the asphalt mixture that has fallen from the inner wall of the upper cavity to the top of the guide plate and the asphalt mixture that is still remaining on the top of the guide plate to the discharge hole so that it can fall into the lower cavity. This ensures the quality of the last batch of asphalt mixture and prevents waste caused by asphalt mixture sticking to the wall.

[0031] 2. As asphalt mixture is continuously fed into the lower cavity, it falls onto the weighing plate and is continuously pressed down and moved until the weighing plate is level with the bottom of the ejection hole near the guide plate or level with the bottom of the ejection hole away from the guide plate, then feeding is stopped.

[0032] 3. After the weighing plate has moved, start the electric push rod to push the scraper towards the ejection hole, thereby pushing the asphalt mixture on the weighing plate out of the ejection hole. The scraper can extend out of the ejection hole to ensure that the asphalt mixture is completely scraped. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0034] Figure 2 This is a schematic diagram illustrating the structure of the stirring assembly in the embodiments of this application;

[0035] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0036] In the diagram: 1. Tank body; 11. Upper cavity; 12. Lower cavity; 13. Connecting hole; 14. Push-out hole; 15. Clearance hole; 16. Lifting plate; 17. Discharge hole; 2. Guide plate; 21. Cavity; 22. Blow-off hole; 3. Stirring assembly; 31. Stirring shaft; 32. Stirring blade; 33. Stirring motor; 4. Opening and closing assembly; 41. Plug plate; 42. Opening and closing electric push rod; 5. Lower scraper assembly; 51. Lower scraper part; 511. Lower scraper ring rod; 512 52. Lower scraper electric push rod; 52. Extension section; 521. Connecting rod; 522. Cleaning rod; 5221. Guide surface; 6. Blow-off assembly; 61. Fan blade; 62. Baffle net; 63. Drive motor; 7. Weighing assembly; 71. Weighing plate; 72. Weighing spring; 73. Vibration motor; 8. Push-out assembly; 81. Push scraper; 82. Push-out electric push rod; 83. Counterweight; 9. Push scraper assembly; 91. Rubber plate; 92. Push scraper electric push rod. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0038] This application discloses an automatic material preparation and dispensing machine. (Refer to...) Figure 1 and Figure 2 An automatic material processing machine includes a tank 1 with a feed inlet extending through it. Inside the tank 1, a pair of guide plates 2 are fixedly installed, with one end of the guide plates 2 facing each other and inclined downwards. The two guide plates 2 divide the interior of the tank 1 into an upper chamber 11 and a lower chamber 12. The upper chamber 11 is used for mixing asphalt mixtures; the lower chamber 12 is used for discharging the asphalt mixture. A gap is left between the two guide plates 2 to form a discharge hole 17, which facilitates the transfer of the asphalt mixture from the upper chamber 11 to the lower chamber 12.

[0039] Reference Figure 2 A connecting hole 13 is provided through the outer top wall of the tank body 1, and a lifting plate 16 is inserted into the connecting hole 13. The lifting plate 16 can move vertically. A stirring assembly 3 is provided on the lifting plate 16, and an opening and closing assembly 4 is provided between the lifting plate 16 and the tank body 1. Before the test, the temperature, time, number of parts and mass of each part of the asphalt mixture are set. Then, the asphalt, aggregates, admixtures and other raw materials are sent into the upper cavity 11 of the tank body 1. In actual application, an automatic heating and heat preservation system can be set to heat the tank body 1. Then, the stirring assembly 3 is started to stir the asphalt mixture. After stirring is completed, the discharge hole 17 can be opened by the opening and closing assembly 4 to transport the asphalt mixture in the upper cavity 11 to the lower cavity 12.

[0040] Reference Figure 2The mixing assembly 3 includes a mixing shaft 31, mixing blades 32, and a mixing motor 33. The mixing shaft 31 is rotatably mounted on the bottom of the lifting plate 16, and the mixing blades 32 are fixed to the side wall of the mixing shaft 31. The mixing motor 33 is fixedly mounted on the top of the lifting plate 16 and drives the mixing shaft 31 to rotate. After the asphalt, aggregates, admixtures, and other raw materials are fed into the upper chamber 11 of the tank 1, the mixing motor 33 is started to drive the mixing shaft 31 to rotate the mixing blades 32, thereby mixing the asphalt mixture in the upper chamber 11 to ensure thorough mixing.

[0041] Reference Figure 2 The opening and closing assembly 4 includes a stopper plate 41 and an electric push rod 42. The electric push rod 42 is fixedly installed on the top wall of the tank 1, and its push shaft is fixedly connected to the top wall of the lifting plate 16. The electric push rod 42 can drive the lifting plate 16 to move up and down in the vertical direction. The end of the stirring shaft 31 away from the stirring motor 33 is rotatably connected to the top wall of the stopper plate 41, and both ends of the stopper plate 41 along its length abut against the inner wall of the upper cavity 11, so that the stopper plate 41 does not easily rotate when the stirring shaft 31 rotates. The cross-section of the stopper plate 41 is an isosceles trapezoid, and the stopper plate 41 is inserted into the discharge hole 17 to seal the discharge hole 17, so that the asphalt mixture in the upper cavity 11 does not easily fall into the lower cavity 12. After the asphalt mixture is mixed, the electric actuator 42 is activated to move the lifting plate 16 vertically downwards. At this time, the stopper plate 41 will slowly open the discharge hole 17, so that the asphalt mixture in the upper cavity 11 will continuously fall into the lower cavity 12. According to the required number of portions, when the single portion mass is about to be reached, the electric actuator 42 is activated again to move the lifting plate 16 vertically upwards. At this time, the stopper plate 41 will slowly close the discharge hole 17. During the closing process, the opening amount of the discharge hole 17 can be continuously reduced so that the amount of falling material is reduced slowly, thereby enabling more precise control of the single portion mass, until the discharge hole 17 is completely closed.

[0042] Reference Figure 2The upper cavity 11 is equipped with a scraper assembly 5, and the guide plate 2 is equipped with a blow-off assembly 6. After the last batch of asphalt mixture is delivered into the lower cavity 12, the scraper assembly 5 and the blow-off assembly 6 are activated. The scraper assembly 5 can scrape off the asphalt mixture remaining on the inner wall of the upper cavity 11; the blow-off assembly 6 can blow off the asphalt mixture remaining on the guide plate 2 and the residual asphalt mixture that the scraper assembly 5 failed to scrape off in the upper cavity 11, and can also blow air onto the stopper plate 41 to a certain extent. The asphalt mixture remaining on the stopper plate 41 is also blown off. After the scraper assembly 5 finishes scraping the inner wall of the upper cavity 11, the scraper assembly 5 can extend to the guide plate 2 and scrape the asphalt mixture that has fallen from the inner wall of the upper cavity 11 to the top of the guide plate 2 and the asphalt mixture remaining on the top of the guide plate 2 to the discharge hole 17 so that it can fall into the lower cavity 12. This ensures that the quality of the last batch of asphalt mixture can be guaranteed and that it is not easy to waste due to the asphalt mixture sticking to the wall.

[0043] Reference Figure 2 The lower scraper assembly 5 includes a lower scraper part 51 and an extension part 52. The lower scraper part 51 includes a lower scraper ring rod 511 and a lower scraper electric push rod 512. The lower scraper electric push rod 512 is fixedly installed on the top wall of the tank body 1, and the push shaft is fixed to the top wall of the lower scraper ring rod 511. The lower scraper ring rod 511 is frame-shaped and located at one end near the top inside the upper cavity 11. The side wall of the lower scraper ring rod 511 abuts against the inner wall of the upper cavity 11. The extension 52 is connected to the bottom of the lower scraper ring 511. After the last batch of asphalt mixture is delivered into the lower cavity 12, the lower scraper electric push rod 512 is activated to push the lower scraper ring 511 to move downward in the vertical direction, thereby scraping off the asphalt mixture remaining on the inner wall of the upper cavity 11. During the process of the lower scraper ring 511 scraping the inner wall of the upper cavity 11, the extension 52 can pre-scrape the inner wall of the upper cavity 11, thereby improving the quality of scraping the inner wall of the upper cavity 11.

[0044] Reference Figure 2 The extension 52 includes a connecting rod 521 and a cleaning rod 522. One end of the connecting rod 521 is hinged to the bottom wall of the lower scraper ring 511, and the other end is fixed to the cleaning rod 522. Two cleaning rods 522 are provided, each corresponding to one of the two guide plates 2. The bottom of the cleaning rod 522 near the inner wall of the upper cavity 11 has an arc-shaped guide surface 5221 along its length. The guide surface 5221 facilitates the cleaning rod 522 to rotate more easily with the inclination of the guide plate 2 after it touches the guide plate 2. As the lower scraper ring 511 moves downward vertically, the cleaning rod 522 also moves downward vertically. After the cleaning rod 522 reaches the guide plate 2, it will rotate through its own guide surface 5221 to scrape the asphalt mixture remaining on the guide plate 2.

[0045] Reference Figure 3The blowdown assembly 6 includes fan blades 61, a baffle net 62, and a drive motor 63. A cavity 21 is formed inside the guide plate 2. Blowdown holes 22 are formed on the top wall and the side away from the inner wall of the upper cavity 11 of the guide plate 2, and these holes 22 communicate with the cavity 21. The drive motor 63 is fixedly installed at the bottom of the guide plate 2 and drives the fan blades 61 to rotate, with the fan blades 61 located inside the cavity 21. After the last portion of asphalt mixture is delivered into the lower cavity 12, the drive motor 63 is activated to drive the fan blades 61 to rotate, and then blow off the asphalt mixture remaining on the guide plate 2 through the blowdown holes 22. The baffle net 62 is fixed to the top and side walls of the guide plate 2 to cover the blowdown holes 22, thus preventing asphalt mixture from easily entering the cavity 21 through the blowdown holes 22.

[0046] Reference Figure 2 A weighing component 7 is installed inside the lower cavity 12. Several ejection holes 14 are vertically oriented through the inner wall of the lower cavity 12. In this embodiment, two ejection holes 14 are provided. The initial position of the weighing component 7 is flush with the inner top of the ejection hole 14 near the guide plate 2. An ejection component 8 is installed on the weighing component 7, and a scraping component 9 is installed on one side of the tank body 1 near the ejection hole 14. Before feeding material into the lower cavity 12, the required mass for the weighing component 7 to move to the inner bottom of the ejection hole 14 near the guide plate 2 and the required mass for the ejection hole 14 away from the guide plate 2 are measured. Then, based on the selected mass, material is fed into the lower cavity 12, and the asphalt mixture will fall onto the weighing component 7. Because the asphalt mixture is relatively viscous, it is not easy to splash and therefore not easy to fall out of the ejection hole 14. This continues until the weighing component 7 moves to the inner top of the ejection hole 14 near the guide plate 2. After the inner bottom is flush with or moved to be flush with the inner bottom of the ejection hole 14 away from the guide plate 2, the feeding is stopped. Then the Marshall sample mold is placed at the ejection hole 14, and the ejection component 8 is activated. The ejection component 8 ejects the asphalt mixture on the weighing component 7 from the ejection hole 14, and the asphalt mixture falls into the Marshall sample mold. Finally, during the retraction of the ejection component 8, the scraping component 9 is activated to scrape the ejection component 8 so that the ejection component 8 does not easily retain asphalt mixture, and the scraped asphalt mixture still falls into the Marshall sample mold.

[0047] Reference Figure 2The weighing assembly 7 includes a weighing plate 71 and a weighing spring 72. The weighing plate 71 is inserted into the lower cavity 12 and can move vertically. The initial position of the weighing plate 71 is flush with the inner bottom of the outlet hole 14 near the guide plate 2. One end of the weighing spring 72 is fixed to the inner bottom wall of the tank 1, and the other end is fixed to the bottom wall of the weighing plate 71. As asphalt mixture is continuously fed into the lower cavity 12, the asphalt mixture falls onto the weighing plate 71 and continuously presses down on the weighing plate 71 until the weighing plate 71 moves to be flush with the inner bottom of the outlet hole 14 near the guide plate 2 or moves to be flush with the inner bottom of the outlet hole 14 away from the guide plate 2, at which point the feeding stops.

[0048] In addition, the weighing assembly 7 also includes a vibration motor 73, which is fixedly installed at the bottom of the weighing plate 71. When the asphalt mixture falls onto the weighing plate 71, the vibration motor 73 can be activated to make the weighing plate 71 vibrate, so that the asphalt mixture on the top of the weighing plate 71 does not accumulate too high and can be slowly spread on the weighing plate 71.

[0049] Reference Figure 2 The ejection assembly 8 includes a scraper 81, a counterweight 83, and an electric ejection rod 82. A long, narrow clearance hole 15 is provided through the tank body 1 on the side opposite to the ejection hole 14. The electric ejection rod 82 is fixedly installed on the top of the weighing plate 71 near the clearance hole 15, and the electric ejection rod 82 passes through the clearance hole 15. The push shaft of the electric ejection rod 82 is fixed to the scraper 81. The scraper 81 is in contact with the top of the weighing plate 71, and the cross-section of the scraper 81 is triangular. After the weighing plate 71 has moved, the electric ejection rod 82 is activated to push the scraper 81 closer to the ejection hole 14, thereby ejecting the asphalt mixture on the weighing plate 71 from the ejection hole 14. The scraper 81 can extend beyond the ejection hole 14 to ensure that the asphalt mixture is completely scraped.

[0050] The counterweight 83 is fixed to the bottom of the weighing plate 71 away from the end of the push rod 82, so that the two ends of the weighing plate 71 can be kept balanced.

[0051] Reference Figure 2 The scraper assembly 9 includes a rubber plate 91 and a scraper electric push rod 92. The scraper electric push rod 92 is fixedly installed on the side of the tank body 1 opposite to the relief hole 15 and above the ejection hole 14. The push shaft of the scraper electric push rod 92 is fixed to the rubber plate 91. During the process of the scraper plate 81 retracting into the ejection hole 14, the scraper electric push rod 92 is activated to push the rubber plate 91 to scrape the scraper plate 81, so that asphalt mixture is not easily left on the scraper plate 81.

[0052] The implementation principle of an automatic material handling machine according to an embodiment of this application is as follows: After the last batch of asphalt mixture is delivered into the downward cavity 12, the drive motor 63 is started to drive the fan blade 61 to rotate, and then blows off the asphalt mixture remaining on the guide plate 2 through the blow-off hole 22. The baffle net 62 is fixed to the top wall and side wall of the guide plate 2 to cover the blow-off hole 22, so that the asphalt mixture is not easy to enter the cavity 21 from the blow-off hole 22.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic material handling machine, comprising a tank (1), characterized in that: A pair of guide plates (2) are fixedly installed inside the tank (1). The two guide plates (2) are arranged opposite to each other and the guide plates (2) divide the inside of the tank (1) into an upper cavity (11) and a lower cavity (12). A connecting hole (13) is opened through the inner top wall of the tank (1). A lifting plate (16) is inserted into the connecting hole (13). A stirring assembly (3) is provided on the lifting plate (16). A discharge hole (17) is left between the two guide plates (2). An opening and closing assembly (4) for opening or closing the discharge hole (17) is provided between the lifting plate (16) and the tank (1). A scraping assembly (5) is provided in the upper cavity (11). A blow-off assembly (6) is provided on the guide plate (2). The lower scraping assembly (5) includes a lower scraping part (51) and an extension part (52). The lower scraping part (51) is connected to the tank body (1) and located in the upper cavity (11). The extension part (52) is connected to the lower scraping part (51). The lower scraper (51) includes a lower scraper ring rod (511) and a lower scraper electric push rod (512). The lower scraper electric push rod (512) is installed on the top wall of the tank (1) and the push shaft is fixed to the lower scraper ring rod (511). The lower scraper ring rod (511) is located in the upper cavity (11) and abuts against the inner wall of the upper cavity (11). The extension (52) is fixed to the lower scraper ring rod (511). The extension (52) includes a connecting rod (521) and a cleaning rod (522). One end of the connecting rod (521) is hinged to the bottom of the lower scraper rod (511), and the other end is fixed to the cleaning rod (522). The cleaning rod (522) has a guide surface (5221) on the side near the inner wall of the tank (1). The opening and closing assembly (4) includes a stopper plate (41) and an opening and closing electric push rod (42). The opening and closing electric push rod (42) is installed on the top wall of the tank (1) and the push shaft is fixedly connected to the top wall of the lifting plate (16). The end of the stirring shaft (31) away from the stirring motor (33) is rotatably connected to the top of the stopper plate (41). The stopper plate (41) is inserted into the discharge hole (17). The blowdown assembly (6) includes a fan blade (61), a baffle net (62), and a drive motor (63). The guide plate (2) has a cavity (21) inside. The side wall and top wall of the guide plate (2) are provided with blowdown holes (22), and the blowdown holes (22) are connected to the cavity (21). The baffle net (62) is fixed on the side wall and top wall of the guide plate (2). The drive motor (63) is installed on the guide plate (2) and drives the fan blade (61) to rotate. The fan blade (61) is located inside the cavity (21). The stirring assembly (3) includes a stirring shaft (31), stirring blades (32) and stirring motor (33). The stirring shaft (31) is rotatably mounted on the bottom wall of the lifting plate (16). The stirring motor (33) is mounted on the top wall of the lifting plate (16) and drives the stirring shaft (31) to rotate. The stirring blades (32) are fixed to the stirring shaft (31). A weighing assembly (7) is provided in the lower cavity (12). A plurality of push-out holes (14) are provided through the side wall of the tank (1). A push-out assembly (8) for pushing out asphalt mixture is provided on the weighing assembly (7). A scraping assembly (9) for scraping the push-out assembly (8) is provided on the side wall of the tank (1).

2. The automatic material preparation and dispensing machine according to claim 1, characterized in that: The weighing assembly (7) includes a weighing plate (71) and a weighing spring (72). One end of the weighing spring (72) is fixed to the inner bottom wall of the tank (1), and the other end is fixed to the bottom wall of the weighing plate (71). The bottom of the weighing plate (71) is flush with the inner top of the push-out hole (14) near one end of the guide plate (2).

3. An automatic material preparation and dispensing machine according to claim 2, characterized in that: The weighing assembly (7) also includes a vibration motor (73), which is fixedly installed on the bottom wall of the weighing plate (71).

4. An automatic material preparation and dispensing machine according to claim 2, characterized in that: The ejection assembly (8) includes a scraper (81), a counterweight (83), and an electric ejection rod (82). A clearance hole (15) is provided through the tank body (1) on the side away from the ejection hole (14). The electric ejection rod (82) is fixed to the top wall of the weighing plate (71) and passes through the clearance hole (15). The push shaft of the electric ejection rod (82) is fixed to the scraper (81). The counterweight (83) is fixed to the bottom wall of the weighing plate (71) away from the electric ejection rod (82).

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