High-modulus asphalt test sample preparation device

Abstract

The invention discloses a high-modulus asphalt test sample preparation device which is characterized in that a mixing barrel for mixing asphalt, aggregate and an additive is fixedly mounted on the inner side of a supporting sleeve, and an asphalt treatment mechanism for preheating the asphalt is fixedly mounted at the top of the mixing barrel; the bottom of the mixing barrel is provided with a quantitative discharging mechanism for quantitatively discharging a mixture, the top of the mold mechanism is provided with a self-adaptive oscillation mechanism, and the device further comprises a gas control mechanism which is respectively matched with the asphalt treatment mechanism, the quantitative discharging mechanism and the self-adaptive oscillation mechanism; when the discharging hopper rotates, a plum blossom cam drives a trapezoidal block through a shifting rod, gas in a gas preheating cavity enters a connecting frame through a gas pipe, a trapezoidal cavity and a gas inlet pipe, the gas pushes a movable plate to rotate in a sliding groove and cross a gas outlet pipe, meanwhile, a sealing plate and an oscillating rod are pushed out, and the oscillating rod strikes the outer side of a mold; and continuous feeding and tamping of the internal asphalt aggregate are realized.

Description

Technical Field

[0001] The invention relates to the technical field of high modulus asphalt test sample preparation, in particular to a high modulus asphalt test sample preparation device. Background Art

[0002] High modulus asphalt refers to modified asphalt that has a significantly improved stiffness modulus compared to ordinary asphalt after adding a modifier. High modulus asphalt needs to prepare samples before use for subsequent testing to observe and obtain experimental data of high modulus asphalt.

[0003] The following problems exist when using the sample preparation device for modulus asphalt test: In terms of raw material pretreatment, after the heating treatment of asphalt, aggregate and additive, the asphalt, aggregate and additive need to be taken out of the heating box and mixed separately. In this process, the heat of the asphalt, aggregate and additive will be lost. In addition, during the asphalt heating process, the oxidation of asphalt can not be prevented and the harmful gas in the asphalt can be discharged, which will affect the subsequent mixing of raw materials and cause problems in the experimental data. During manual injection molding and mixing processes, the mixing barrel 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 is not lost, manual injection molding will not load the mixture into the mold multiple times. After each loading, the tamping rod is used to tamp the periphery of the mold for a certain number of times, resulting in segregation of the mixture or excessive gaps.

[0004] Therefore, a high modulus asphalt test sample preparation device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a high modulus asphalt test sample preparation device to solve the problem of multiple compaction while preventing asphalt oxidation and ensuring that the temperature is not lost, as mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a high modulus asphalt test sample preparation device, comprising a base, a support rod is fixedly connected to the top of the base, and a support sleeve is fixedly connected to the top of the support rod; A mixing cylinder for mixing asphalt, aggregate and additives is fixedly installed on the inner side of the support sleeve, and a gas preheating chamber is provided inside the mixing cylinder; The top of the mixing cylinder is fixedly installed with an asphalt processing mechanism for preheating asphalt, an aggregate heating cylinder for preheating aggregate, and an additive placing cylinder for processing additives; The asphalt processing mechanism comprises an asphalt processing cylinder fixedly connected to the top of the mixing cylinder, a sealing cover is provided on the asphalt processing cylinder, a driving motor is fixedly connected to the top of the sealing cover, and a spiral mixing rod is fixedly connected to the output shaft of the driving motor; The bottom of the mixing cylinder is provided with a quantitative feeding mechanism for quantitatively feeding the mixed material; A mold mechanism for injection molding asphalt is arranged on the top of the base, and the mold mechanism comprises a mold table fixedly connected to the top of the base, and a mold for molding asphalt mixture is arranged on the mold table; An adaptive oscillation mechanism is provided on the top of the mold mechanism, and the adaptive oscillation mechanism includes a placement plate fixedly connected to the top of the mold table, a connection frame is installed inside the placement plate, and an oscillation component for oscillating and compacting the mold according to the feeding amount of the quantitative feeding mechanism is provided on the outside of the connection frame; It also includes a gas control mechanism, which cooperates with the asphalt processing mechanism, the quantitative feeding mechanism and the adaptive oscillation mechanism respectively, and the gas control mechanism includes a vacuum pump fixedly connected to the top of the mixing cylinder and used to evacuate the air inside the asphalt processing cylinder and an air pump fixedly connected to the top of the mixing cylinder and used to supplement the inert gas inside the asphalt processing 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 opened inside the connecting plate, the trapezoidal cavity and the rotating cavity are connected through a connecting groove, the gas preheating cavity and the connecting plate are connected 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 lever is fixedly connected to the bottom of the trapezoidal block, a plum blossom cam for cooperating with the quantitative feeding mechanism to rotate is arranged inside the rotating cavity, and the lever is arranged at the bottom of the plum blossom cam after passing through the connecting groove; The connecting plate and the connecting frame are communicated with each other through an air inlet pipe.

[0007] Preferably: the aggregate heating cylinder, the additive placement cylinder and the asphalt treatment cylinder are each provided with a heating component, the heating component includes a heating wire, an external power supply, a temperature sensor and a controller; the aggregate heating cylinder and the additive placement cylinder are each provided with a stirring component, the stirring component includes a motor and a stirring rod.

[0008] Preferably, a mixing assembly for mixing asphalt, aggregate and additives is arranged inside the mixing cylinder, and the mixing assembly comprises a motor and a multi-stage stirring shaft.

[0009] Preferably, a positioning groove is provided inside the mold table, a positioning plate is slidably connected inside the positioning groove, and the mold is placed inside the positioning plate.

[0010] Preferably: the quantitative feeding mechanism includes a feeding barrel, the feeding port at the top of the feeding barrel is connected to the feeding port at the bottom of the mixing barrel through a feeding pipe, the bottom feeding port of the feeding barrel is arranged directly above the mold, the outer side of the feeding barrel is fixedly connected to a servo motor, the outer side of the output shaft of the servo motor is fixedly connected to a feeding hopper, the feeding hopper is provided with at least one bucket piece, the opening range between two adjacent bucket pieces is larger than the range of the feeding port of the feeding barrel, the bucket piece on the outer side of the feeding hopper is in contact with the inner wall of the feeding barrel, and the output shaft of the servo motor passes through the feeding barrel and the connecting plate and is fixedly connected to the plum blossom cam.

[0011] Preferably: the oscillation component includes a connecting tube fixedly connected to the outside of the connecting frame, a limiting groove is provided inside the connecting tube, a sealing plate is slidably connected inside the limiting groove, an oscillation rod is fixedly connected to the outside of the sealing plate, an elastic rope is fixedly connected between the sealing plate and the limiting groove on the connecting tube, and the connecting tube is connected to the connecting frame.

[0012] Preferably: a fixed plate is fixedly connected to the inside of the connecting frame, a sliding groove is provided on the inner side wall of the connecting frame, a movable plate is slidably connected to the inside of the sliding groove, a torsion spring is also fixedly installed between the movable plate and the sliding groove, a through hole connected to the air inlet pipe is provided on the connecting frame, an air outlet pipe is fixedly connected to the connecting frame, the air outlet pipe passes through the connecting frame and is connected to an external exhaust gas treatment tank, and magnets are fixedly installed on one side of the fixed plate and one side of the movable plate.

[0013] Preferably, the bottoms of the mixing cylinder, the aggregate heating cylinder, the additive placement cylinder and the asphalt treatment cylinder are all equipped with on-off valves for controlling the discharge of materials.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 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.

[0015] 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; 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

[0016] Figure 1 It is the overall structural view of the present invention; Figure 2 An exploded view of the mold mechanism of the present invention; Figure 3 It is a cross-sectional view of the overall structure of the present invention; Figure 4 It is an enlarged view of the local structure A of the present invention; Figure 5 It is an enlarged view of the local structure B of the present invention; Figure 6 It is an enlarged view of the local structure C of the present invention; Figure 7 is a schematic cross-sectional structural diagram of the gas control mechanism of the present invention; Figure 8 It is a connection diagram of the internal structure of the adaptive oscillation mechanism of the present invention; Fig. 9 It is a schematic diagram of the installation structure of the oscillating component and the connecting frame of the present invention; Fig.10 It is a schematic cross-sectional structural diagram of the connection frame of the present invention; Fig.11 It is a schematic cross-sectional structural diagram of the oscillating component of the present invention; Fig.12 The diagram is a schematic diagram of the asphalt rolling up and down working state of the present invention.

[0017] In the figure: 1. Base; 2. Support rod; 3. Support sleeve; 4. Mixing cylinder; 41. Gas preheating chamber; 42. Mixing assembly; 5. Aggregate heating cylinder; 6. Additive placing cylinder; 7. Asphalt processing mechanism; 71. Asphalt processing cylinder; 72. Sealing cover; 73. Driving motor; 74. Spiral mixing rod; 8. mold mechanism; 81. mold table; 82. positioning groove; 83. positioning plate; 84. mold; 9. Quantitative feeding mechanism; 91. Feeding barrel; 92. Servo motor; 93. Feeding hopper; 10. Adaptive oscillation mechanism; 1001. Placement plate; 1002. Connection frame; 1003. Oscillation assembly; 10031. Connection tube; 10032. Oscillation rod; 10033. Sealing plate; 10034. Elastic rope; 1004. Movable plate; 1005. Fixed plate; 1006. Air inlet pipe; 1007. Air outlet pipe; 11. Gas control mechanism; 1101. Vacuum pump; 1102. Air pump; 1103. Connecting plate; 1104. Trapezoidal cavity; 1105. Trapezoidal block; 1106. Spring; 1107. Rotating cavity; 1108. Push rod; 1109. Plum blossom cam; 12. On-off valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 12 The present invention provides a technical solution for a high modulus asphalt test sample preparation device: A high modulus asphalt test sample preparation device comprises a base 1, a support rod 2 is fixedly connected to the top of the base 1, and a support sleeve 3 is fixedly connected to the top of the support rod 2; A mixing cylinder 4 for mixing asphalt, aggregate and additives is fixedly installed on the inner side of the support sleeve 3, and a gas preheating chamber 41 is provided inside the mixing cylinder 4; The top of the mixing cylinder 4 is fixedly installed with 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; 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 includes a mold table 81 fixedly connected to the top of the base 1. A mold 84 for molding the asphalt mixture is arranged on the mold table 81. An adaptive oscillating mechanism 10 is provided on the top of the mold mechanism 8. The adaptive oscillating mechanism 10 includes a placement plate 1001 fixedly connected to the top of the mold table 81. A connecting frame 1002 is installed inside the placement plate 1001. An oscillating component 1003 for oscillating and compacting the mold 84 according to the feeding amount of the quantitative feeding mechanism 9 is provided on the outside of the connecting frame 1002. The invention also includes a gas control mechanism 11, which 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 interior of the gas preheating chamber 41 through a pipeline. A connecting plate 1103 is fixedly installed on the outer side of the quantitative feeding mechanism 9, and the interior of the connecting plate 1103 is respectively provided with There are a trapezoidal chamber 1104 and a rotating chamber 1107, the trapezoidal chamber 1104 and the rotating chamber 1107 are connected through a connecting groove, the gas preheating chamber 41 and the connecting plate 1103 are connected through a pipeline, the trapezoidal chamber 1104 is slidably connected with a trapezoidal block 1105, a spring 1106 is fixedly connected between the trapezoidal block 1105 and the trapezoidal chamber 1104, a lever 1108 is fixedly connected to the bottom of the trapezoidal block 1105, a plum blossom cam 1109 for cooperating with the quantitative unloading mechanism 9 to rotate is arranged inside the rotating chamber 1107, and the lever 1108 is arranged at the bottom of the plum blossom cam 1109 after passing through the connecting groove; The connecting plate 1103 is connected to the connecting frame 1002 via an air inlet pipe 1006; The bottom 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 an on-off valve 12 for controlling the discharge of materials; After the aggregate, asphalt and additives 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 interior of the asphalt treatment cylinder 71. Then, the opening and closing valves 12 at the bottom of the asphalt treatment cylinder 71, the aggregate heating cylinder 5 and the additive placement cylinder 6 are opened to cause the aggregate in the aggregate heating cylinder 5, the additive in the additive placement 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, the filling of 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, adding inert gas to the mixing cylinder 4 helps to reduce the degree of oxidation 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 be left still for a period of time after the transfer, the high-temperature gas can preheat the mixing cylinder 4 to prevent the inner wall temperature of the mixing cylinder 4 from being too low, causing the asphalt to adhere to the inner wall, and at the same time avoid the temperature drop of asphalt, aggregates and additives, which affects the quality of the final product.

[0020] As an embodiment of the present invention, Figures 1 to 3 As shown, 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 includes a heating wire, an external power supply, a temperature sensor and a controller, and the aggregate heating cylinder 5 and the additive placement cylinder 6 are each provided with a stirring component, the stirring component includes a motor and a stirring rod.

[0021] During operation, asphalt is placed in the asphalt treatment cylinder 71, aggregate is placed in the aggregate heating cylinder 5, and additive is placed in the additive placement cylinder 6. Then the air pump 1102 is started, and the air pump 1102 injects inert gas into the asphalt treatment cylinder 71 to remove the air therein and form 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 additive reach the predetermined temperature, the heating is stopped, and the two are kept at the temperature.

[0022] As an embodiment of the present invention, Figures 2 to 4 As shown, a mixing assembly 42 for mixing asphalt, aggregate and additives is disposed inside the mixing barrel 4. The mixing assembly 42 includes a motor and a multi-stage stirring shaft.

[0023] During operation, after asphalt is placed in the asphalt processing barrel 71, the drive motor 73 is started, and the operation of the drive motor 73 drives the spiral mixing rod 74 to rotate, thereby mixing the asphalt in the barrel. The thread design of the spiral mixing rod 74 makes the asphalt roll up and down in the barrel. Its working principle is as follows Fig.12As shown. During the tumbling process, the inert gas in the barrel is brought into the asphalt, forming bubbles and absorbing harmful gases therein. The inert gas will not undergo an oxidation reaction with the asphalt. When the asphalt temperature reaches a predetermined value, the drive 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 barrel and introduce it into the gas preheating chamber 41. As needed, the vacuum pump 1101 can be started during the mixing process, and the inert gas is continuously added to the barrel through the air pump 1102, which not only increases the air pressure in the chamber, but also increases the preheating temperature of the mixing barrel 4. When the air pressure in the chamber is close to the ideal value, the air pump 1102 is stopped. At this time, the vacuum pump 1101 only sucks the residual gas in the barrel into the chamber to avoid the increase of air pressure caused by additional gas. A near-vacuum environment is formed in the barrel, and the bubbles inside the asphalt escape under the action of atmospheric pressure, effectively eliminating the bubbles inside the asphalt.

[0024] The motor on the mixing component 42 is started. When the motor rotates, it drives the multi-stage stirring shaft to rotate. The multi-stage stirring shaft will evenly mix the asphalt, aggregate and additives, and continue stirring for three to five minutes.

[0025] As an embodiment of the present invention, Figure 2 As shown, a positioning groove 82 is provided inside the mold table 81 , a positioning plate 83 is slidably connected inside the positioning groove 82 , and a mold 84 is placed inside the positioning plate 83 .

[0026] During operation, the mold 84 can be precisely positioned and placed by setting the mold table 81, the positioning groove 82 and the positioning plate 83. After the injection molding is completed, the mold 84 containing the mixture is placed on the Marshall compactor (the device is a prior art and will not be described in detail here) for compaction. According to the test standard, the double-sided compaction is generally 75 times. 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. Then 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 demoulding machine or manually.

[0027] As an embodiment of the present invention, Figures 1 to 12As shown, the quantitative unloading mechanism 9 includes a unloading barrel 91, a feeding port at the top of the unloading barrel 91 is connected to a discharging port at the bottom of the mixing barrel 4 through a unloading pipe, and a bottom discharging port of the unloading barrel 91 is arranged just above the mold 84. A servo motor 92 is fixedly connected to the outside of the unloading barrel 91, and a unloading hopper 93 is fixedly connected to the outside of the output shaft of the servo motor 92, and at least one bucket piece is arranged on the unloading hopper 93, and the opening range between two adjacent bucket pieces is larger than the range of the feeding port of the unloading barrel 91, and the bucket piece on the outside of the unloading hopper 93 fits with the inner wall of the unloading barrel 91, and the output shaft of the servo motor 92 passes through the unloading barrel 91 and the connecting plate 1103 and is fixedly connected to the plum blossom cam 1109, and the oscillation component 1003 includes a connecting barrel 10031 fixedly connected to the outside of the connecting frame 1002, and a limiting groove is arranged inside the connecting barrel 10031, and the internal sliding connection of the limiting groove A sealing plate 10033 is connected, an oscillation rod 10032 is fixedly connected to the outer side of the sealing plate 10033, an elastic rope 10034 is fixedly connected between the sealing plate 10033 and the limiting groove on the connecting tube 10031, the connecting tube 10031 is communicated with the connecting frame 1002, a fixed plate 1005 is fixedly connected to the inside of 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 to the inside of the sliding groove, a torsion spring is also fixedly installed between the movable plate 1004 and the sliding groove, a through hole connected to 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 the external exhaust gas treatment tank, and magnets are fixedly installed on one side of the fixed plate 1005 and one side of the movable plate 1004.

[0028] During operation, after the mixing is completed, the on-off valve 12 at the bottom of the mixing barrel 4 is opened first, and then the servo motor 92 is started. The servo motor 92 drives the lower hopper 93 to rotate. Since the opening range between the two adjacent bucket pieces on the lower hopper 93 is larger than the range of the feed port of the lower barrel 91, the mixed asphalt aggregate will fall between the two adjacent bucket pieces after the lower hopper 93 rotates, and 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, so that the gas in the gas preheating cavity 41 passes through the air pipe, the trapezoidal cavity 1104 and the feed port. The air pipe 1006 enters the interior of the connection frame 1002. 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-blocks the trapezoidal cavity 1104. When necessary, the number of protruding ends of the plum blossom cam 1109 and the number of bucket pieces on the lower hopper 93 can be increased or decreased synchronously to achieve synchronization between the two. When two adjacent bucket pieces with asphalt aggregate on the lower hopper 93 rotate to the discharge port of the lower barrel 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 lower hopper 93 needs to be filled multiple times. Since the lower hopper 93 will synchronously drive the plum blossom cam 1109 to move the trapezoidal block 1105 once through the lever 1108 every time it rotates a certain angle, the gas inside the gas preheating chamber 41 will enter the interior of the connecting frame 1002 through the air pipe, the trapezoidal chamber 1104 and the air inlet pipe 1006. The gas entering the connecting frame 1002 will push the movable plate 1004 to rotate inside the slide groove on the connecting frame 1002 until the movable plate 1004 slides and passes over the air outlet pipe 1007. During this process, the gas inside the connecting frame 1002 will push out the sealing plate 10033 and the oscillation rod 10032. After being pushed out, the oscillation rod 10032 will hit the outside of the mold 84, thereby realizing the oscillation compaction of the asphalt aggregate inside the mold 84. Furthermore, it is achieved that a small amount of material is added to the mold 84 each time, and it is vibrated and compacted after each addition to avoid the accumulation of asphalt aggregates. When the movable plate 1004 passes over the outlet pipe 1007, the gas will be discharged into the exhaust gas treatment tank through the outlet pipe 1007. Since the movable plate 1004 and the fixed plate 1005 are fixedly connected with magnets, when the movable plate 1004 passes over the outlet pipe 1007, the movable plate 1004 will be attracted by the air pressure and the magnet. When the air pressure inside the connecting frame 1002 is not completely released, 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 released, the torsion spring will drive the movable plate 1004 to reset, and repeat the above steps.

[0029] Working principle: during operation, asphalt is placed into the asphalt treatment cylinder 71, aggregate is placed into the aggregate heating cylinder 5, and additive is placed into the additive placement cylinder 6. Then, the air pump 1102 is turned on. The air pump 1102 introduces inert gas into the asphalt treatment cylinder 71, thereby discharging the air inside the asphalt treatment cylinder 71, so that an inert gas atmosphere is formed inside the asphalt treatment cylinder 71. Then, the heating components on the aggregate heating cylinder 5, the additive placement cylinder 6 and the asphalt treatment cylinder 71 are started to heat the asphalt, aggregate and additive respectively. When the aggregate and additive reach the specified temperature, the heating is stopped, and the aggregate and additive are maintained at this temperature and left to stand. During this process, the drive motor 73 is started. After the drive motor 73 rotates, it drives the spiral mixing rod 74 to rotate. After the spiral mixing rod 74 rotates, it stirs the asphalt inside the asphalt treatment cylinder 71. Due to the threaded structure of the spiral mixing rod 74, the asphalt inside the asphalt treatment cylinder 71 can be wrapped up and surging. Its working state is as follows: Fig.11 As shown, the inert gas inside the asphalt treatment cylinder 71 will be brought into the asphalt during surging, and the gas entering 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 73 is stopped, and the asphalt is allowed to stand at this temperature for about 20 minutes. During the standing process of the asphalt, the vacuum pump 1101 is turned on to extract the gas inside the asphalt treatment cylinder 71, and the extracted gas is introduced into the gas preheating chamber 41, so that a vacuum-like state is formed inside the asphalt treatment cylinder 71. At this time, the bubbles inside the asphalt will escape from the inside of the asphalt under the action of atmospheric pressure, thereby effectively eliminating the bubbles inside the asphalt. When the aggregate, asphalt and additives meet the experimental requirements, first stop the vacuum pump 1101, then open the air pump 1102 and inflate the interior of the asphalt treatment cylinder 71, then open the on-off valve 12 below the asphalt treatment cylinder 71, the aggregate heating cylinder 5 and the additive placement cylinder 6. At this time, the aggregate in the aggregate heating cylinder 5, the additive in the additive placement cylinder 6 and the asphalt in the asphalt treatment cylinder 71 will all fall into the mixing cylinder 4. Since asphalt is relatively viscous, when air is filled into the asphalt treatment cylinder 71, the asphalt in the asphalt treatment cylinder 71 will be accelerated. Entering into the mixing barrel 4, the temperature loss of asphalt in the process can be reduced, and then the inert gas can be supplemented inside the mixing barrel 4 to reduce the degree of oxidation of the asphalt. Since the vacuum pump 1101 introduces the high-temperature gas in the asphalt treatment barrel 71 into the gas preheating chamber 41, and the asphalt needs to be left to stand for a period of time after introduction, the mixing barrel 4 can be preheated in advance by the high-temperature gas, which can avoid the asphalt adhering to the inner wall of the mixing barrel 4 due to the inner wall temperature of the mixing barrel 4 being too low, and the temperature of the asphalt, aggregate and additives being reduced, which affects the final quality; The motor on the mixing assembly 42 is started. When the motor rotates, it drives the multi-stage stirring shaft to rotate. The multi-stage stirring shaft will evenly mix the asphalt, aggregate and additives, and continue stirring for three to five minutes; After the mixing is completed, the on-off valve 12 at the bottom of the mixing barrel 4 is opened first, and then the servo motor 92 is started. The servo motor 92 drives the lower hopper 93 to rotate. Since the opening range between the two adjacent bucket pieces on the lower hopper 93 is larger than the range of the feed port of the lower barrel 91, the mixed asphalt aggregate will fall between the two adjacent bucket pieces after the lower hopper 93 rotates, and 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, so that the gas in the gas preheating cavity 41 passes through the air pipe, the trapezoidal cavity 1104 and the air inlet pipe. 1006 enters the interior of the connection frame 1002. 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-blocks the trapezoidal cavity 1104. When necessary, the number of protruding ends of the plum blossom cam 1109 and the number of bucket pieces on the lower hopper 93 can be increased or decreased synchronously to achieve synchronization between the two. When two adjacent bucket pieces with asphalt aggregate on the lower hopper 93 rotate to the discharge port of the lower barrel 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 lower hopper 93 needs to be filled multiple times. Since the lower hopper 93 will synchronously drive the plum blossom cam 1109 to move the trapezoidal block 1105 once through the lever 1108 every time it rotates a certain angle, the gas inside the gas preheating chamber 41 will enter the interior of the connecting frame 1002 through the air pipe, the trapezoidal chamber 1104 and the air inlet pipe 1006. The gas entering the connecting frame 1002 will push the movable plate 1004 to rotate inside the slide groove on the connecting frame 1002 until the movable plate 1004 slides and passes over the air outlet pipe 1007. During this process, the gas inside the connecting frame 1002 will push out the sealing plate 10033 and the oscillation rod 10032. After being pushed out, the oscillation rod 10032 will hit the outside of the mold 84, thereby realizing the oscillation compaction of the asphalt aggregate inside the mold 84. Furthermore, it is achieved that a small amount of material is added to the mold 84 each time, and it is vibrated and compacted after each addition to avoid the accumulation of asphalt aggregates. When the movable plate 1004 passes over the outlet pipe 1007, the gas will be discharged into the exhaust gas treatment tank through the outlet pipe 1007. Since the movable plate 1004 and the fixed plate 1005 are fixedly connected with magnets, when the movable plate 1004 passes over the outlet pipe 1007, the movable plate 1004 will be attracted by the air pressure and the magnet. When the air pressure inside the connecting frame 1002 is not completely released, 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 released, the torsion spring will drive the movable plate 1004 to reset, and repeat the above steps.

[0030] It should be noted that the amount and speed of 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 oscillation component 1003 can be controlled synchronously.

[0031] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that 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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