A high-modulus asphalt test sample preparation device

Abstract

The present invention discloses a high-modulus asphalt test sample preparation device. An inner side of the support sleeve is fixedly installed with a mixing cylinder for mixing asphalt, aggregates and additives. A top of the mixing cylinder is fixedly installed with an asphalt treatment mechanism for preheating the asphalt. A bottom of the mixing cylinder is provided with a quantitative feeding mechanism for quantitatively feeding the mixture. An adaptive oscillation mechanism is arranged on a top of the mold mechanism. The device further includes a gas control mechanism, and the gas control mechanism cooperates with the asphalt treatment mechanism, the quantitative feeding mechanism and the adaptive oscillation mechanism respectively; when the feeding hopper rotates, a plum blossom cam drives a trapezoidal block through a lever, so that gas in the gas preheating cavity enters the connecting frame through a trachea, a trapezoidal cavity and an air inlet pipe. The gas pushes the movable plate to rotate in the chute and pass over the air outlet pipe. At the same time, a sealing plate and an oscillation rod are pushed out, and the oscillation rod strikes the outside of the mold, realizing continuous feeding and compaction of the internal asphalt aggregates.

Description

Technical Field

[0001] The present invention relates to the technical field of high modulus asphalt test sample preparation, and specifically to a high modulus asphalt test sample preparation device. Background Technique

[0002] High modulus asphalt refers to modified asphalt whose stiffness modulus has been significantly increased compared to ordinary asphalt after adding modifiers. Before use, samples of high modulus asphalt need to be prepared first for subsequent testing to observe and obtain experimental data of high modulus asphalt.

[0003] The following problems exist when using the modulus asphalt test sample preparation device;

[0004] In terms of pretreatment of raw materials, after the heating treatment of asphalt, aggregates and additives, it is necessary to take out the asphalt, aggregates and additives from the heating box respectively and mix them. In this process, heat loss of the asphalt, aggregates and additives will occur, and during the heating process of asphalt, neither can prevent asphalt oxidation nor can harmful gases in the asphalt be discharged, thus affecting the subsequent mixing of raw materials and resulting in problems with experimental data;

[0005] During the manual operation of injection molding and mixing, the mixing cylinder is generally not preheated, resulting in changes in the temperature of the raw materials. At the same time, in order to ensure that the temperature will not be lost during manual injection molding, the mixture will not be loaded into the mold in multiple times. After each loading, a tamping rod is used to insert and tamp around the mold a certain number of times, resulting in segregation or excessive voids in the mixture.

[0006] Therefore, a high modulus asphalt test sample preparation device is proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a high modulus asphalt test sample preparation device to solve the problems of preventing asphalt oxidation and ensuring that multiple rammings can be carried out without heat loss as mentioned in the above background technique.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A high modulus asphalt test sample preparation device, including a base, a support rod fixedly connected to the top of the base, and a support sleeve fixedly connected to the top of the support rod;

[0009] A mixing cylinder for mixing asphalt, aggregates and additives is fixedly installed inside the support sleeve, and a gas preheating cavity is opened inside the mixing cylinder;

[0010] An asphalt treatment mechanism for preheating asphalt, an aggregate heating cylinder for preheating aggregates, and an additive placement cylinder for treating additives are fixedly installed on the top of the mixing cylinder;

[0011] The asphalt treatment mechanism includes an asphalt treatment cylinder fixedly connected to the top of the mixing cylinder. A sealing cover is provided on the asphalt treatment cylinder. A driving motor is fixedly connected to the top of the sealing cover. A spiral mixing rod is fixedly connected to the output shaft of the driving motor;

[0012] A quantitative feeding mechanism for quantitatively feeding the mixture is provided at the bottom of the mixing cylinder;

[0013] A mold mechanism for injecting asphalt is provided on the top of the base. The mold mechanism includes a mold table fixedly connected to the top of the base. A mold for shaping the asphalt mixture is provided on the mold table;

[0014] An adaptive oscillation mechanism is provided on the top of the mold mechanism. The adaptive oscillation mechanism includes a placement plate fixedly connected to the top of the mold table. A connecting frame is installed inside the placement plate. An oscillation assembly for oscillating and ramming the mold according to the feeding amount of the quantitative feeding mechanism is provided on the outside of the connecting frame;

[0015] It further includes a gas control mechanism. The gas control mechanism cooperates with the asphalt treatment mechanism, the quantitative feeding mechanism and the adaptive oscillation mechanism respectively. The gas control mechanism includes a vacuum pump fixedly connected to the top of the mixing cylinder and used for evacuating the air inside the asphalt treatment cylinder and an air pump fixedly connected to the top of the mixing cylinder and used for supplementing inert gas into the asphalt treatment cylinder. The outlet of the vacuum pump is connected to the inside of the gas preheating chamber through a pipeline. A connecting plate is fixedly installed on the outside of the quantitative feeding mechanism. A trapezoidal cavity and a rotating cavity are respectively formed inside the connecting plate. The trapezoidal cavity and the rotating cavity are communicated through a communicating groove. The gas preheating chamber is communicated with the connecting plate through a pipeline. A trapezoidal block is slidably connected inside the trapezoidal cavity. A spring is fixedly connected between the trapezoidal block and the trapezoidal cavity. A dial rod is fixedly connected to the bottom of the trapezoidal block. A plum blossom cam for cooperating with the rotation of the quantitative feeding mechanism is arranged inside the rotating cavity. The dial rod is arranged at the bottom of the plum blossom cam after passing through the communicating groove;

[0016] The connecting plate and the connecting frame are communicated through an air inlet pipe.

[0017] Preferably: Heating components are provided inside the aggregate heating cylinder, the additive placement cylinder and the asphalt treatment cylinder. The heating components include heating wires, an external power supply, temperature sensors and controllers. Stirring components are provided inside the aggregate heating cylinder and the additive placement cylinder. The stirring components include motors and stirring rods.

[0018] Preferably: A mixing component for mixing asphalt, aggregates and additives is provided inside the mixing cylinder. The mixing component includes a motor and a multi-stage stirring shaft.

[0019] Preferably, a positioning groove is formed inside the mold table, a positioning plate is slidably connected inside the positioning groove, and the mold is placed inside the positioning plate.

[0020] Preferably, the quantitative feeding mechanism includes a feeding cylinder. The feeding port at the top of the feeding cylinder is communicated with the discharging port at the bottom of the mixing cylinder through a feeding pipe. The discharging port at the bottom of the feeding cylinder is arranged directly above the mold. A servo motor is fixedly connected to the outer side of the feeding cylinder. A feeding hopper is fixedly connected to the outer side of the output shaft of the servo motor. At least one hopper piece is arranged on the feeding hopper. The opening range between two adjacent hopper pieces is larger than the range of the feeding port of the feeding cylinder. The hopper piece on the outer side of the feeding hopper fits against the inner wall of the feeding cylinder. The output shaft of the servo motor penetrates through the feeding cylinder and the connecting plate and is fixedly connected to the plum blossom cam.

[0021] Preferably, the vibration assembly includes a connecting cylinder fixedly connected to the outer side of the connecting frame. A limiting groove is formed inside the connecting cylinder. A sealing plate is slidably connected inside the limiting groove. A vibration rod is fixedly connected to the outer side of the sealing plate. An elastic rope is fixedly connected between the sealing plate and the limiting groove on the connecting cylinder. The connecting cylinder communicates with the connecting frame.

[0022] Preferably, a fixing plate is fixedly connected inside the connecting frame. A sliding groove is formed on the inner side wall of the connecting frame. A movable plate is slidably connected inside the sliding groove. A torsion spring is also fixedly installed between the movable plate and the sliding groove. A through hole communicating with the air inlet pipe is formed on the connecting frame. An air outlet pipe is fixedly connected to the connecting frame. The air outlet pipe penetrates through the connecting frame and is communicated with an external waste gas treatment tank. Magnets are fixedly installed on one side of the fixing plate and one side of the movable plate respectively.

[0023] Preferably, opening and closing valves for controlling discharging are installed at the bottoms of the mixing cylinder, the aggregate heating cylinder, the additive placing cylinder and the asphalt treatment cylinder.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] In the present invention, the driving motor is started, and the driving motor rotates to drive the spiral mixing rod to rotate, so that the asphalt inside the asphalt processing cylinder is wrapped up and down and surging. Its working state is shown in the figure. During surging, the inert gas inside the asphalt processing cylinder will be brought into the interior of the asphalt. The gas entering the interior of the asphalt will form bubbles in the asphalt and can absorb harmful gases inside the asphalt. At the same time, the inert gas will not react with the asphalt for oxidation. When the temperature of the asphalt reaches the specified temperature, the driving motor is stopped, and the asphalt is allowed to stand at this temperature for about minutes. During the standing process of the asphalt, the vacuum pump is turned on to extract the gas inside the asphalt processing cylinder, so that a vacuum-like state is formed inside the asphalt processing cylinder. At this time, the bubbles inside the asphalt will escape from the interior of the asphalt under the action of atmospheric pressure, thereby effectively eliminating the bubbles and harmful gases inside the asphalt.

[0026] In the present invention, by introducing the extracted gas into the gas preheating chamber, the mixing drum can be preheated in advance by the high-temperature gas, so as to avoid the asphalt adhering to the inner wall of the mixing drum due to the inner wall temperature of the mixing drum being too low and the temperature of the asphalt, aggregate and additive being reduced, thereby affecting the performance of the asphalt mixture;

[0027] In the present invention, the servo motor is started, and the servo motor drives the lower hopper to rotate. Since the opening range between two adjacent bucket pieces on the lower hopper is larger than the range of the feed port of the lower barrel, the mixed asphalt aggregate will fall between the two adjacent bucket pieces after the lower hopper rotates. Since the plum blossom cam will synchronously drive the trapezoidal block once through the lever every time the lower hopper rotates a certain angle, the gas inside the gas preheating chamber enters the interior of the connecting frame through the air pipe, the trapezoidal cavity and the air inlet pipe. The gas entering the connecting frame will push the movable plate to rotate inside the slide groove on the connecting frame until the movable plate slides and passes over the air outlet pipe. In this process, the gas inside the connecting frame will push the sealing plate and the vibration rod out. After being pushed out, the vibration rod will hit the outside of the mold, thereby realizing multiple feedings and vibration compaction of the asphalt aggregate inside the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the overall structural view of the present invention;

[0029] Figure 2 An exploded view of the mold mechanism of the present invention;

[0030] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0031] Figure 4 It is an enlarged view of the local structure A of the present invention;

[0032] Figure 5 It is an enlarged view of the local structure B of the present invention;

[0033] Figure 6 It is an enlarged view of the local structure C of the present invention;

[0034] Figure 7 It is a schematic cross-sectional structure diagram of the gas control mechanism of the present invention;

[0035] Figure 8 It is an internal structure connection diagram of the adaptive oscillation mechanism of the present invention;

[0036] Figure 9 It is a schematic installation structure diagram of the oscillation component and the connection frame of the present invention;

[0037] Figure 10 It is a schematic cross-sectional structure diagram of the connection frame of the present invention;

[0038] Figure 11 It is a schematic cross-sectional structure diagram of the oscillation component of the present invention;

[0039] Figure 12 It is a schematic diagram of the working state of the asphalt tumbling up and down of the present invention.

[0040] In the figure:

[0041] 1. Base; 2. Support rod; 3. Support sleeve;

[0042] 4. Mixing cylinder; 41. Gas preheating chamber; 42. Mixing component;

[0043] 5. Aggregate heating cylinder; 6. Additive placement cylinder;

[0044] 7. Asphalt treatment mechanism; 71. Asphalt treatment cylinder; 72. Sealing cover; 73. Driving motor; 74. Spiral mixing rod;

[0045] 8. Mold mechanism; 81. Mold table; 82. Positioning groove; 83. Positioning plate; 84. Mold;

[0046] 9. Quantitative feeding mechanism; 91. Feeding cylinder; 92. Servo motor; 93. Feeding hopper;

[0047] 10. Adaptive oscillation mechanism; 1001. Placing plate; 1002. Connection frame; 1003. Oscillation component; 10031. Connection cylinder; 10032. Oscillation rod; 10033. Sealing plate; 10034. Elastic rope; 1004. Movable plate; 1005. Fixed plate; 1006. Inlet pipe; 1007. Outlet pipe;

[0048] 11. Gas control mechanism; 1101. Vacuum pump; 1102. Air pump; 1103. Connection plate; 1104. Trapezoidal cavity; 1105. Trapezoidal block; 1106. Spring; 1107. Rotating cavity; 1108. Poking rod; 1109. Plum blossom cam;

[0049] 12. On-off valve. Specific implementation mode

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0051] Please refer to Figures 1 to 12 , the present invention provides a technical solution for a high-modulus asphalt test sample preparation device:

[0052] A high-modulus asphalt test sample preparation device includes a base 1, a support rod 2 fixedly connected to the top of the base 1, and a support sleeve 3 fixedly connected to the top of the support rod 2;

[0053] An inner side of the support sleeve 3 is fixedly installed with a mixing cylinder 4 for mixing asphalt, aggregates and additives, and a gas preheating cavity 41 is opened inside the mixing cylinder 4;

[0054] The top of the mixing cylinder 4 is fixedly installed with an asphalt treatment mechanism 7 for preheating asphalt, an aggregate heating cylinder 5 for preheating aggregates, and an additive placing cylinder 6 for treating additives;

[0055] The asphalt treatment mechanism 7 includes an asphalt treatment cylinder 71 fixedly connected to the top of the mixing cylinder 4, a sealing cover 72 is arranged on the asphalt treatment cylinder 71, a driving motor 73 is fixedly connected to the top of the sealing cover 72, and a spiral mixing rod 74 is fixedly connected to an output shaft of the driving motor 73;

[0056] The bottom of the mixing cylinder 4 is provided with a quantitative feeding mechanism 9 for quantitatively feeding the mixture;

[0057] The top of the base 1 is provided with a mold mechanism 8 for injecting the asphalt into a mold. The mold mechanism 8 includes a mold table 81 fixedly connected to the top of the base 1, and a mold 84 for shaping the asphalt mixture is arranged on the mold table 81;

[0058] The top of the mold mechanism 8 is provided with an adaptive vibration mechanism 10. The adaptive vibration mechanism 10 includes a placement plate 1001 fixedly connected to the top of the mold table 81, a connection frame 1002 is installed inside the placement plate 1001, and an outer side of the connection frame 1002 is provided with a vibration assembly 1003 for vibrating and ramming the mold 84 according to the feeding amount of the quantitative feeding mechanism 9;

[0059] It further includes a gas control mechanism 11, which cooperates with the asphalt treatment mechanism 7, the metering and feeding mechanism 9, and the adaptive oscillation mechanism 10 respectively. The gas control mechanism 11 includes a vacuum pump 1101 fixedly connected to the top of the mixing cylinder 4 and used to evacuate the air inside the asphalt treatment cylinder 71, and an air pump 1102 fixedly connected to the top of the mixing cylinder 4 and used to supplement inert gas into the asphalt treatment cylinder 71. The outlet of the vacuum pump 1101 is connected to the inside of the gas preheating chamber 41 through a pipeline. A connecting plate 1103 is fixedly installed on the outside of the metering and feeding mechanism 9. A trapezoidal cavity 1104 and a rotating cavity 1107 are respectively formed inside the connecting plate 1103. The trapezoidal cavity 1104 and the rotating cavity 1107 are communicated through a communication groove. The gas preheating chamber 41 is communicated with the connecting plate 1103 through a pipeline. A trapezoidal block 1105 is slidably connected inside the trapezoidal cavity 1104. A spring 1106 is fixedly connected between the trapezoidal block 1105 and the trapezoidal cavity 1104. A lever 1108 is fixedly connected to the bottom of the trapezoidal block 1105. A plum blossom cam 1109 for cooperating with the rotation of the metering and feeding mechanism 9 is arranged inside the rotating cavity 1107. The lever 1108 is arranged at the bottom of the plum blossom cam 1109 after passing through the communication groove;

[0060] The connecting plate 1103 is communicated with the connecting frame 1002 through an air inlet pipe 1006;

[0061] Opening and closing valves 12 for controlling the discharge are installed at the bottoms of the mixing cylinder 4, the aggregate heating cylinder 5, the additive placing cylinder 6, and the asphalt treatment cylinder 71;

[0062] After the aggregate, asphalt, and additive all meet the experimental standards, the operation of the vacuum pump 1101 should be terminated first, and then the air pump 1102 should be started to inflate the inside of the asphalt treatment cylinder 71. Then, the opening and closing valves 12 at the bottoms of the asphalt treatment cylinder 71, the aggregate heating cylinder 5, and the additive placing cylinder 6 should be opened to cause the aggregate in the aggregate heating cylinder 5, the additive in the additive placing cylinder 6, and the asphalt in the asphalt treatment cylinder 71 to fall into the mixing cylinder 4 together. In view of the high viscosity of asphalt, filling air can accelerate the transfer of asphalt from the asphalt treatment cylinder 71 to the mixing cylinder 4, thereby reducing the temperature loss of asphalt during the transfer process. In addition, supplementing inert gas into the mixing cylinder 4 helps to reduce the oxidation degree of asphalt. Since the vacuum pump 1101 introduces the high-temperature gas in the asphalt treatment cylinder 71 into the gas preheating chamber 41, and the asphalt needs to stand for a period of time after transfer, the high-temperature gas can preheat the mixing cylinder 4 in advance to prevent the inner wall temperature of the mixing cylinder 4 from being too low, resulting in asphalt adhering to the inner wall, and at the same time avoid the temperature drop of asphalt, aggregate, and additive, affecting the quality of the final product.

[0063] As an embodiment of the present invention, such as Figures 1 to 3As shown, heating components are provided inside the aggregate heating cylinder 5, the additive placement cylinder 6, and the asphalt treatment cylinder 71. The heating components include heating wires, an external power supply, temperature sensors, and controllers. Stirring components are provided inside both the aggregate heating cylinder 5 and the additive placement cylinder 6. The stirring components include motors and stirring rods.

[0064] During operation, the asphalt is placed into the asphalt treatment cylinder 71, the aggregate is placed into the aggregate heating cylinder 5, and at the same time, the additive is placed into the additive placement cylinder 6. Then, the air pump 1102 is started. The air pump 1102 injects inert gas into the asphalt treatment cylinder 71 to remove the air therein, forming an inert gas environment. After that, the heating devices on the aggregate heating cylinder 5, the additive placement cylinder 6, and the asphalt treatment cylinder 71 are activated to heat the asphalt, aggregate, and additive. Once the aggregate and the additive reach the predetermined temperature, the heating is stopped, and the two are allowed to stand at this temperature.

[0065] As an embodiment of the present invention, as Figures 2 to 4 shown, a mixing component 42 for mixing the asphalt, aggregate, and additive is provided inside the mixing cylinder 4. The mixing component 42 includes a motor and a multi-stage stirring shaft.

[0066] During operation, after the asphalt is placed into the asphalt treatment cylinder 71, the driving motor 73 is started. The rotation of the driving motor 73 drives the spiral mixing rod 74 to rotate, thereby stirring the asphalt in the cylinder. The threaded design of the spiral mixing rod 74 causes the asphalt to tumble up and down in the cylinder, and its working principle is as Figure 12 shown. During the tumbling process, the inert gas in the cylinder is brought into the interior of the asphalt, forming bubbles and adsorbing the harmful gases therein. The inert gas does not undergo an oxidation reaction with the asphalt. When the temperature of the asphalt reaches the predetermined value, the driving motor 73 is stopped, and the asphalt is allowed to stand for about 20 minutes. During the standing period, the vacuum pump 1101 is started to extract the gas in the cylinder and introduce it into the gas preheating chamber 41. If necessary, the vacuum pump 1101 can be started during the stirring process, and at the same time, the air pump 1102 continuously supplements inert gas into the cylinder, which not only increases the air pressure in the chamber but also raises the preheating temperature of the mixing cylinder 4. When the air pressure in the chamber approaches the ideal value, the air pump 1102 is stopped. At this time, the vacuum pump 1101 only sucks the residual gas in the cylinder into the chamber to avoid the rise in air pressure caused by additional gas. An approximately vacuum environment is formed in the cylinder, and the bubbles inside the asphalt escape under the action of atmospheric pressure, effectively eliminating the bubbles inside the asphalt.

[0067] Start the motor on the mixing component 42. After the motor rotates, it drives the multi-stage stirring shaft to rotate. The multi-stage stirring shaft will uniformly mix the asphalt, aggregate, and additive and continuously stir for three to five minutes.

[0068] As an embodiment of the present invention, as Figure 2As shown in the figure, a positioning groove 82 is provided inside the mold table 81. A positioning plate 83 is slidably connected inside the positioning groove 82, and the mold 84 is placed inside the positioning plate 83.

[0069] During operation, by setting the mold table 81, the positioning groove 82, and the positioning plate 83, the mold 84 can be conveniently and accurately positioned and placed. After the injection molding is completed, the mold 84 filled with the mixture is placed on a Marshall compactor (this device is a prior art and will not be elaborated here) for compaction. According to the test standard, generally, it is compacted 75 times on both sides. During the compaction process, it is necessary to ensure that the drop hammer of the compactor falls vertically and the energy of each compaction is uniform. Subsequently, the mold 84 is cooled for 12 - 24 hours to fully harden the asphalt mixture, and then the specimen is carefully removed from the mold 84 using a demolding machine or manually.

[0070] As an embodiment of the present invention, as Figures 1 to 12 shown, the quantitative feeding mechanism 9 includes a feeding cylinder 91. The feeding port at the top of the feeding cylinder 91 is connected to the discharging port at the bottom of the mixing cylinder 4 through a feeding pipe. The discharging port at the bottom of the feeding cylinder 91 is arranged directly above the mold 84. A servo motor 92 is fixedly connected to the outside of the feeding cylinder 91. A feeding hopper 93 is fixedly connected to the outside of the output shaft of the servo motor 92. At least one blade is provided on the feeding hopper 93. The opening range between two adjacent blades is larger than the range of the feeding port of the feeding cylinder 91. The blades on the outside of the feeding hopper 93 are attached to the inner wall of the feeding cylinder 91. The output shaft of the servo motor 92 passes through the feeding cylinder 91 and the connecting plate 1103 and is fixedly connected to the plum blossom cam 1109. The oscillation assembly 1003 includes a connecting cylinder 10031 fixedly connected to the outside of the connecting frame 1002. A limiting groove is provided inside the connecting cylinder 10031. A sealing plate 10033 is slidably connected inside the limiting groove. An oscillation rod 10032 is fixedly connected to the outside of the sealing plate 10033. An elastic rope 10034 is fixedly connected between the sealing plate 10033 and the limiting groove on the connecting cylinder 10031. The connecting cylinder 10031 is communicated with the connecting frame 1002. A fixing plate 1005 is fixedly connected inside the connecting frame 1002. A sliding groove is provided on the inner side wall of the connecting frame 1002. A movable plate 1004 is slidably connected inside the sliding groove. A torsion spring is also fixedly installed between the movable plate 1004 and the sliding groove. A through hole communicated with the air inlet pipe 1006 is provided on the connecting frame 1002. An air outlet pipe 1007 is fixedly connected to the connecting frame 1002. The air outlet pipe 1007 passes through the connecting frame 1002 and is communicated with an external waste gas treatment tank. Magnets are fixedly installed on one side of the fixing plate 1005 and one side of the movable plate 1004.

[0071] During operation, after the stirring is completed, first open the opening and closing valve 12 at the bottom of the mixing cylinder 4, and then start the servo motor 92. The servo motor 92 drives the hopper 93 to rotate. Since the opening range between two adjacent bucket pieces on the hopper 93 is larger than the range of the feed inlet of the feed cylinder 91, after the hopper 93 rotates, the mixed asphalt aggregate will fall between two adjacent bucket pieces. Moreover, the output shaft of the servo motor 92 is connected to the plum blossom cam 1109. After the plum blossom cam 1109 rotates, it will drive the lever 1108 to move downward through its protruding end. After the lever 1108 moves downward, it will drive the trapezoidal block 1105 to move downward. When the trapezoidal block 1105 moves downward, it will no longer fit with the trapezoidal cavity 1104, thereby enabling the gas in the gas preheating chamber 41 to enter the interior of the connecting frame 1002 through the trachea, the trapezoidal cavity 1104, and the inlet pipe 1006. When the protruding end of the plum blossom cam 1109 does not contact the lever 1108, the spring 1106 will push the trapezoidal block 1105 to reset, causing the trapezoidal block 1105 to re-seal the trapezoidal cavity 1104. When needed, the synchronization between the two can be achieved by synchronously increasing or decreasing the number of protruding ends of the plum blossom cam 1109 and the number of bucket pieces on the hopper 93. When two adjacent bucket pieces with asphalt aggregate on the hopper 93 rotate to the discharge port of the feed cylinder 91, the asphalt aggregate inside will fall into the mold 84 through the discharge port. Since the amount of asphalt aggregate between two adjacent bucket pieces is limited, when it is necessary to fill the mold 84 with a specified amount of asphalt aggregate, the hopper 93 needs to be filled multiple times;

[0072] Since the feeding hopper 93 drives the plum blossom cam 1109 to toggle the trapezoidal block 1105 through the lever 1108 every time it rotates a certain angle, the gas inside the gas preheating chamber 41 enters the inside of the connecting frame 1002 through the air pipe, the trapezoidal chamber 1104 and the air inlet pipe 1006. The gas entering the inside of the connecting frame 1002 will push the movable plate 1004 to rotate inside the chute of the connecting frame 1002 until the movable plate 1004 slides and crosses the air outlet pipe 1007. During this process, the gas inside the connecting frame 1002 will push out the sealing plate 10033 and the shock rod 10032. After the shock rod 10032 is pushed out, it will strike the outside of the mold 84, thereby realizing the shock compaction of the asphalt aggregate inside the mold 84. Furthermore, it realizes quantitative and small-scale feeding into the mold 84 each time, and shock compaction is carried out after each feeding to avoid the accumulation of asphalt aggregate. When the movable plate 1004 crosses the air outlet pipe 1007, the gas will be discharged into the waste gas treatment tank through the air outlet pipe 1007. Since magnets are fixedly connected to both the movable plate 1004 and the fixed plate 1005, when the movable plate 1004 crosses the air outlet pipe 1007, under the action of air pressure and magnetic adsorption, when the air pressure inside the connecting frame 1002 is not completely discharged, the torsion spring cannot overcome the magnetic force and gas pressure, so that the movable plate 1004 will not reset. When a certain amount of gas inside the connecting frame 1002 is discharged, the torsion spring will drive the movable plate 1004 to reset and repeat the above steps.

[0073] Working principle: During operation, put asphalt into the inside of the asphalt treatment cylinder 71, put aggregate into the inside of the aggregate heating cylinder 5, and then put additives into the inside of the additive placement cylinder 6. Then turn on the air pump 1102, and the air pump 1102 introduces inert gas into the inside of the asphalt treatment cylinder 71, thereby discharging the air inside the asphalt treatment cylinder 71 and creating an inert gas atmosphere inside the asphalt treatment cylinder 71. Then start the heating components on the aggregate heating cylinder 5, the additive placement cylinder 6 and the asphalt treatment cylinder 71 to heat-treat the asphalt, aggregate and additives respectively. When the aggregate and additives reach the specified temperature, stop heating and keep the aggregate and additives at this temperature and stand still. During this process, start the drive motor 73. After the drive motor 73 rotates, it drives the spiral mixing rod 74 to rotate. After the spiral mixing rod 74 rotates, it will stir the asphalt inside the asphalt treatment cylinder 71. Due to the thread structure of the spiral mixing rod 74, the asphalt inside the asphalt treatment cylinder 71 can be in a state of turning over and wrapping up and down. Its working state is as Figure 11As shown, when surging, the inert gas inside the asphalt treatment cylinder 71 will be brought into the interior of the asphalt. The gas entering the asphalt will form bubbles in the asphalt and can adsorb the harmful gases inside the asphalt. At the same time, the inert gas will not react with the asphalt oxidatively. When the temperature of the asphalt reaches the specified temperature, stop the drive motor 73 and let the asphalt stand at this temperature for about 20 minutes. During the standing process of the asphalt, turn on the vacuum pump 1101 to pump out the gas inside the asphalt treatment cylinder 71 and introduce the pumped gas into the interior of the gas preheating chamber 41, so as to form a quasi-vacuum state inside the asphalt treatment cylinder 71. At this time, the bubbles inside the asphalt will escape from the interior of the asphalt under the action of atmospheric pressure, thereby effectively eliminating the bubbles inside the asphalt;

[0074] When the aggregate, asphalt, and additive all meet the experimental requirements, first stop the vacuum pump 1101 from working, then turn on the air pump 1102 and inflate the interior of the asphalt treatment cylinder 71. Subsequently, open the opening and closing valve 12 below the asphalt treatment cylinder 71, the aggregate heating cylinder 5, and the additive placement cylinder 6. At this time, the aggregate inside the aggregate heating cylinder 5, the additive inside the additive placement cylinder 6, and the asphalt inside the asphalt treatment cylinder 71 will all fall into the interior of the mixing cylinder 4. Since the asphalt is relatively viscous, when inflating the interior of the asphalt treatment cylinder 71 with air, it will accelerate the entry of the asphalt inside the asphalt treatment cylinder 71 into the mixing cylinder 4, thereby reducing the temperature loss of the asphalt during this process. Subsequently, inert gas can also be supplemented into the interior of the mixing cylinder 4 to reduce the degree of oxidation of the asphalt. Since the vacuum pump 1101 introduces the high-temperature gas in the asphalt treatment cylinder 71 into the gas preheating chamber 41 and the asphalt needs to stand for a period of time after being introduced, the mixing cylinder 4 can be preheated in advance by the high-temperature gas, which can avoid the asphalt adhering to the inner wall of the mixing cylinder 4 and the reduction of the temperatures of the asphalt, aggregate, and additive due to the too low inner wall temperature of the mixing cylinder 4, thus affecting the final quality;

[0075] Start the motor on the mixing assembly 42. After the motor rotates, it drives the multi-stage stirring shaft to rotate. The multi-stage stirring shaft will evenly mix the asphalt, aggregate, and additive and continuously stir for three to five minutes;

[0076] After the stirring is completed, first open the opening and closing valve 12 at the bottom of the mixing drum 4, and then start the servo motor 92. The servo motor 92 drives the feeding hopper 93 to rotate. Since the opening range between two adjacent blade pieces on the feeding hopper 93 is larger than the range of the feeding port of the feeding cylinder 91, the mixed asphalt aggregate will fall between two adjacent blade pieces after the feeding hopper 93 rotates. Moreover, the output shaft of the servo motor 92 is connected to the plum blossom cam 1109. After the plum blossom cam 1109 rotates, it will drive the lever 1108 to move downward through its protruding end. After the lever 1108 moves downward, it will drive the trapezoidal block 1105 to move downward. When the trapezoidal block 1105 moves downward, it will no longer fit with the trapezoidal cavity 1104, thereby enabling the gas in the gas preheating cavity 41 to enter the interior of the connecting frame 1002 through the trachea, the trapezoidal cavity 1104, and the intake pipe 1006. When the protruding end of the plum blossom cam 1109 does not contact the lever 1108, the spring 1106 will push the trapezoidal block 1105 to reset, so that the trapezoidal block 1105 re-seals the trapezoidal cavity 1104. When needed, the synchronization between the two can be achieved by synchronously increasing or decreasing the number of protruding ends of the plum blossom cam 1109 and the number of blade pieces on the feeding hopper 93. When two adjacent blade pieces with asphalt aggregate on the feeding hopper 93 rotate to the discharge port of the feeding cylinder 91, the asphalt aggregate inside will fall into the mold 84 through the discharge port. Since the amount of asphalt aggregate between two adjacent blade pieces is limited, when it is necessary to fill the mold 84 with a specified amount of asphalt aggregate, the feeding hopper 93 needs to be filled multiple times;

[0077] Since the blanking hopper 93 drives the plum blossom cam 1109 to toggle the trapezoidal block 1105 once through the lever 1108 every time it rotates a certain angle, the gas inside the gas preheating chamber 41 enters the inside of the connecting frame 1002 through the trachea, the trapezoidal chamber 1104 and the intake pipe 1006. The gas entering the inside of the connecting frame 1002 will push the movable plate 1004 to rotate inside the chute of the connecting frame 1002 until the movable plate 1004 slides and crosses the outlet pipe 1007. During this process, the gas inside the connecting frame 1002 will push out the sealing plate 10033 and the shock rod 10032. After the shock rod 10032 is pushed out, it will strike the outside of the mold 84, thereby realizing the shock compaction of the asphalt aggregate inside the mold 84. Furthermore, it realizes quantitative and small-scale feeding into the mold 84 each time, and shock compaction is carried out after each feeding to avoid the accumulation of asphalt aggregate. When the movable plate 1004 crosses the outlet pipe 1007, the gas will be discharged into the waste gas treatment tank through the outlet pipe 1007. Since magnets are fixedly connected to both the movable plate 1004 and the fixed plate 1005, when the movable plate 1004 crosses the outlet pipe 1007, under the action of air pressure and magnetic adsorption, when the air pressure inside the connecting frame 1002 has not been completely discharged, the torsion spring cannot overcome the magnetic force and gas pressure, so that the movable plate 1004 will not reset. When a certain amount of gas inside the connecting frame 1002 is discharged, the torsion spring will drive the movable plate 1004 to reset and repeat the above steps.

[0078] It should be noted that the amount and speed of the asphalt aggregate entering the mold 84 each time can be controlled by adjusting the rotation speed of the servo motor 92, and the working speed of the shock component 1003 can be synchronously controlled.

[0079] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high modulus asphalt test sample preparation device, comprising a base (1), a support rod (2) fixedly connected to the top of the base (1), a support sleeve (3) fixedly connected to the top of the support rod (2), characterized in that: A mixing cylinder (4) for mixing asphalt, aggregate and additives is fixedly mounted on the inner side of the support sleeve (3), and a gas preheating chamber (41) is provided inside the mixing cylinder (4); An asphalt processing mechanism (7) for preheating asphalt, an aggregate heating cylinder (5) for preheating aggregate, and an additive placement cylinder (6) for processing additives are fixedly mounted on the top of the mixing cylinder (4); The asphalt processing mechanism (7) comprises an asphalt processing cylinder (71) fixedly connected to the top of the mixing cylinder (4); a sealing cover (72) is provided on the asphalt processing cylinder (71); a driving motor (73) is fixedly connected to the top of the sealing cover (72); and a spiral mixing rod (74) is fixedly connected to the output shaft of the driving motor (73); The bottom of the mixing barrel (4) is provided with a quantitative feeding mechanism (9) for quantitatively feeding the mixed material; A mold mechanism (8) for injection molding asphalt is arranged on the top of the base (1), the mold mechanism (8) comprising a mold table (81) fixedly connected to the top of the base (1), and a mold (84) for molding the asphalt mixture is arranged on the mold table (81); An adaptive oscillating mechanism (10) is arranged on the top of the mold mechanism (8), and the adaptive oscillating mechanism (10) comprises a placement plate (1001) fixedly connected to the top of the mold platform (81), a connecting frame (1002) is installed inside the placement plate (1001), and an oscillating component (1003) is arranged on the outside of the connecting frame (1002) for oscillating and compacting the mold (84) according to the feeding amount of the quantitative feeding mechanism (9); The invention also includes a gas control mechanism (11), wherein the gas control mechanism (11) cooperates with the asphalt processing mechanism (7), the quantitative feeding mechanism (9) and the adaptive oscillation mechanism (10), respectively. The gas control mechanism (11) includes a vacuum pump (1101) fixedly connected to the top of the mixing cylinder (4) and used to evacuate the air inside the asphalt processing cylinder (71) and an air pump (1102) fixedly connected to the top of the mixing cylinder (4) and used to supplement the asphalt processing cylinder (71) with inert gas. The outlet of the vacuum pump (1101) is connected to the inside of the gas preheating chamber (41) through a pipeline. A connecting plate (1103) is fixedly installed on the outside of the quantitative feeding mechanism (9), and the inside of the connecting plate (1103) is respectively provided with a ladder. A trapezoidal cavity (1104) and a rotating cavity (1107), the trapezoidal cavity (1104) and the rotating cavity (1107) are connected via a connecting groove, the gas preheating cavity (41) and the connecting plate (1103) are connected via a pipeline, a trapezoidal block (1105) is slidably connected inside the trapezoidal cavity (1104), a spring (1106) is fixedly connected between the trapezoidal block (1105) and the trapezoidal cavity (1104), a lever (1108) is fixedly connected to the bottom of the trapezoidal block (1105), a plum blossom cam (1109) is arranged inside the rotating cavity (1107) for cooperating with the quantitative feeding mechanism (9) to rotate, and the lever (1108) is arranged at the bottom of the plum blossom cam (1109) after passing through the connecting groove; The connection plate (1103) and the connection frame (1002) are connected via an air intake pipe (1006).

2. A high modulus asphalt test sample preparation device according to claim 1, characterized in that: The aggregate heating cylinder (5), the additive placement cylinder (6) and the asphalt treatment cylinder (71) are each provided with a heating component, the heating component comprising a heating wire, an external power supply, a temperature sensor and a controller; the aggregate heating cylinder (5) and the additive placement cylinder (6) are each provided with a stirring component, the stirring component comprising a motor and a stirring rod.

3. A high modulus asphalt test sample preparation device according to claim 1, characterized in that: A mixing assembly (42) for mixing asphalt, aggregate and additives is arranged inside the mixing cylinder (4), and the mixing assembly (42) comprises a motor and a multi-stage stirring shaft.

4. A high modulus asphalt test sample preparation device according to claim 1, characterized in that: A positioning groove (82) is provided inside the mold table (81), a positioning plate (83) is slidably connected inside the positioning groove (82), and the mold (84) is placed inside the positioning plate (83).

5. A high modulus asphalt test sample preparation device according to claim 4, characterized in that: The quantitative feeding mechanism (9) comprises a feeding barrel (91), a feeding port at the top of the feeding barrel (91) being connected to a feeding port at the bottom of the mixing barrel (4) via a feeding pipe, the bottom feeding port of the feeding barrel (91) being arranged directly above the mould (84), a servo motor (92) being fixedly connected to the outside of the feeding barrel (91), a feeding hopper (93) being fixedly connected to the outside of the output shaft of the servo motor (92), at least one bucket piece being arranged on the feeding hopper (93), the opening range between two adjacent bucket pieces being larger than the range of the feeding port of the feeding barrel (91), the bucket piece on the outside of the feeding hopper (93) being in contact with the inner wall of the feeding barrel (91), and the output shaft of the servo motor (92) passing through the feeding barrel (91) and the connecting plate (1103) and then being fixedly connected to the plum blossom cam (1109).

6. A high modulus asphalt test sample preparation device according to claim 1, characterized in that: The oscillation component (1003) comprises a connection tube (10031) fixedly connected to the outside of the connection frame (1002); a limit groove is provided inside the connection tube (10031); a sealing plate (10033) is slidably connected inside the limit groove; an oscillation rod (10032) is fixedly connected to the outside of the sealing plate (10033); an elastic rope (10034) is fixedly connected between the sealing plate (10033) and the limit groove on the connection tube (10031); and the connection tube (10031) is connected to the connection frame (1002).

7. A high modulus asphalt test sample preparation device according to claim 1, characterized in that: The interior of the connection frame (1002) is fixedly connected to a fixed plate (1005); the inner side wall of the connection frame (1002) is provided with a slide groove; the interior of the slide groove is slidably connected to a movable plate (1004); a torsion spring is fixedly installed between the movable plate (1004) and the slide groove; the connection frame (1002) is provided with a through hole connected to an air inlet pipe (1006); the connection frame (1002) is fixedly connected to an air outlet pipe (1007); the air outlet pipe (1007) passes through the connection frame (1002) and is connected to an external exhaust gas treatment tank; magnets are fixedly installed on one side of the fixed plate (1005) and one side of the movable plate (1004).

8. A high modulus asphalt test sample preparation device according to claim 1, characterized in that: The bottoms of the mixing cylinder (4), the aggregate heating cylinder (5), the additive placement cylinder (6) and the asphalt treatment cylinder (71) are all equipped with on-off valves (12) for controlling the discharge of materials.

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