Metering and delivery device and method for a modified bitumen

Abstract

The application relates to a modified asphalt metering and conveying device and a conveying method applied to the technical field of conveying devices, which is characterized in that the cooperation of the horizontal movement unit and the electric heating ring of the external device can improve the fluidity of the asphalt at the passive section, accelerate the transfer of the asphalt into the vertical conveyor, and make the active section present a dynamic peristalsis along the direction of asphalt flow. Compared with the prior art, the effect of accelerating the conveying of the asphalt at the passive section can be achieved without direct contact with the asphalt in the passive section. In addition, the diameter of the active section of the peristaltic pipe can be changed. When the asphalt conveying efficiency slows down, the diameter of the active section can be continuously changed, the asphalt throughput per unit time can be effectively improved, and when the inner diameter is restored, the automatic thrust can be generated along the direction of the inclination from the outside to the vertical conveyor, so that the conveying efficiency of the asphalt to the vertical conveyor is further improved.

Description

Technical Field

[0001] This invention relates to a metering and conveying device and method for modified asphalt, and particularly to a metering and conveying device and method for modified asphalt applied in the technical field of conveying devices. Background Technology

[0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a type of high-viscosity organic liquid and is in a liquid state. Asphalt is a waterproof, moisture-proof, and corrosion-resistant organic cementitious material. During its production and processing, it needs to be weighed and transported to designated equipment for relevant processing, so appropriate feeding devices are required.

[0003] Existing material metering and conveying devices for asphalt processing generally include a horizontal conveyor with a hopper and a metering disc, a transition pipe, and a vertical conveyor. For example, the specification with publication number CN101643146A discloses a material metering and conveying device for artificial asphalt processing. In the actual processing and transportation process, material is injected into the hopper, and the amount of material entering the hopper is weighed by the metering disc until the amount of material reaches the required metering. Then, the injection of material into the hopper is stopped. The material entering the horizontal conveyor through the hopper is conveyed to the transition pipe by the rotating screw conveyor rod inside the horizontal conveyor, and then enters the vertical conveyor through the transition pipe. Finally, it is lifted upward by the screw conveyor rod inside the vertical conveyor and discharged through the discharge pipe.

[0004] However, during the process of conveying asphalt from the horizontal conveyor to the vertical conveyor, a transition pipe is required for transfer. Due to the high viscosity of asphalt, it is easy for it to stagnate or even become blocked at the transition pipe. This can lead to situations where the vertical conveyor experiences partial empty pipes or low conveying efficiency when conveying upwards. To solve this problem, Chinese Patent Specification No. CN116553100B discloses a material metering and conveying device for asphalt processing. A push plate is added inside the transition pipe, and an external piston rod drives the push plate through the horizontal conveyor to push the asphalt and accelerate its flow into the vertical conveyor.

[0005] However, the method of using an internal pusher plate to push the material has the following drawbacks: after pushing the material, the retraction process will cause the asphalt to move away from the transition pipe in the opposite direction, which will also lead to low asphalt conveying efficiency. In addition, the pusher plate and piston rod are in direct contact with the asphalt, which will make cleaning difficult and result in high operating costs for this setup. Summary of the Invention

[0006] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that asphalt tends to stagnate at transition points during asphalt transportation, which affects the efficiency of asphalt transportation.

[0007] To address the aforementioned problems, this invention provides a metering and conveying device for modified asphalt, comprising a vertical conveyor, a horizontal conveyor placed on a support, and a peristaltic tube connected between the lower end of the vertical conveyor and the end of the horizontal conveyor. A control center is installed on the peristaltic tube. A base plate is fixedly connected to the lower end of the vertical conveyor, and a discharge pipe is fixedly connected to the upper outer end of the vertical conveyor. The base plate is fixed to the ground by multiple anchor bolts. Drive motors are installed at the end of the horizontal conveyor away from the vertical conveyor and at the upper end of the vertical conveyor. Horizontal and vertical augers are respectively installed inside the horizontal and vertical conveyors, and the horizontal and vertical augers are fixedly connected to the output ends of their respective drive motors. A metering feed hopper is fixedly connected to the upper end of the horizontal conveyor near the drive motor.

[0008] The peristaltic tube includes a passive section and an active section fixedly embedded in the middle of the passive section. The passive section and the active section are coaxially arranged. An electric heating ring is fixedly installed on the outer end of the passive section facing the horizontal conveyor. Translation units are set between the upper and lower ends of the active section and the horizontal conveyor. The translation unit includes a fixed seat fixedly connected to the horizontal conveyor, a positioning plate fixedly connected to the middle of the active section, and an electric push rod fixedly installed between the fixed seat and the positioning plate. The electric heating ring and the electric push rod are both connected to the control center signal. Grooves are chiseled at the corresponding positions of the horizontal conveyor and the lower electric push rod, and the electric push rod moves through the grooves.

[0009] The active section includes two symmetrical axially moving half tubes and two follower layers that are fixedly connected between the corresponding ends of the two axially moving half tubes. The end faces of the two axially moving half tubes that are close to each other are chiseled with arc-shaped long grooves. The two opposite arc-shaped long grooves are coaxially arranged, and multiple rolling balls are placed inside them. The multiple rolling balls are located inside the follower layers.

[0010] In the aforementioned metering and conveying device for modified asphalt, the combined use of an external translational unit and an electric heating ring can, on the one hand, specifically improve the fluidity of the asphalt in the passive section and accelerate the transfer of asphalt into the vertical conveyor; on the other hand, it can make the active section move dynamically along the direction of asphalt flow. Compared with existing technologies, this can achieve the effect of accelerating the conveying of asphalt in the passive section without direct contact with the asphalt in the passive section.

[0011] As a further improvement of this application, both the discharge pipe and the passive section are inclined and their orientations are opposite. The angle between the passive section and the horizontal conveyor at the connection point facing the drive motor is greater than 120°.

[0012] As a further improvement of this application, the two electric actuators move in opposite directions, and both electric actuators are arranged parallel to the passive section.

[0013] As a further improvement of this application, the passive section and the follower layer are both made of high-temperature resistant elastic material, the axial half tube is made of rigid material, and the inner surfaces of the follower layer and the axial half tube are flush with each other, and both inner surfaces are coated with a nano-coating.

[0014] As another improvement of this application, a one-way diameter expansion unit is provided outside the active section. The one-way diameter expansion unit includes a diameter control ring sleeved outside the passive section and two connecting rods fixedly connected between the diameter control ring and the two positioning plates. The diameter control ring is coaxially arranged with the passive section.

[0015] As a further improvement to this application, the axially driven half-tube includes a half-tube skeleton, an inner layer fixedly connected to the inner wall of the half-tube skeleton on the side near the axis of the passive section, and a plurality of unidirectional magnetic strips fixedly attached to the outer surface of the inner layer, wherein an outer covering layer is fixedly connected to the outer surface of the unidirectional magnetic strips.

[0016] As a further improvement to this application, the inner layer is a high-temperature resistant elastic sheet, and both the unidirectional magnetic strip and the outer cover are made of elastic material. Along the direction away from the heating ring, the width of the unidirectional magnetic strip gradually decreases. Two adjacent outer covers are close to each other but do not contact each other, and the widths at both ends of the outer covers are the same.

[0017] As a further improvement to this application, the narrow end of the unidirectional magnetic strip faces the control ring, and an iron sheet is fixedly embedded inside the narrow end of the unidirectional magnetic strip. The control ring is fixedly embedded with multiple electromagnetic plates corresponding to multiple unidirectional magnetic strips, and the on / off state of the electromagnetic plates is connected to the control center signal.

[0018] A metering and conveying device for modified asphalt, the transportation method of which includes the following steps:

[0019] S1. First, start the two drive motors and start the heating ring to heat the feed side of the passive section. Then, add the asphalt into the horizontal conveyor through the metering feed hopper. Under the action of the horizontal auger, the asphalt is transported to the end of the horizontal conveyor. Then, it passes through the passive section and reaches the vertical conveyor. Under the action of the vertical auger, the asphalt is lifted and then discharged at the discharge pipe.

[0020] S2. During the asphalt transportation process, the control center controls the two translational units to move alternately in opposite directions, which in turn causes the two axial half-pipes to move in opposite directions, presenting a back-and-forth misalignment state, thus making the asphalt in the passive section dynamic.

[0021] S3. When the discharge speed at the discharge pipe slows down significantly or discontinuous discharge occurs, control the two translational units to return to their initial state. At this time, the two axial half-pipes are completely opposite to each other. Then, control the electromagnetic plate in the diameter control ring to be energized, thereby attracting the unidirectional magnetic strip outward, causing the active section to expand outward. Maintain the expansion state for 5-10 seconds, and then control the electromagnetic plate to be de-energized, so that the unidirectional magnetic strip quickly recovers its deformation, thereby generating extrusion force on the asphalt in the passive section.

[0022] S4. Repeatedly switching the electromagnetic plate on and off enables rapid transfer of asphalt from the horizontal conveyor to the vertical conveyor without direct external contact with the asphalt.

[0023] In summary, by using the external translational unit and the heating ring in combination, the fluidity of asphalt in the passive section can be specifically improved, accelerating the transfer of asphalt into the vertical conveyor. On the other hand, the active section can be dynamically peristaltic along the direction of asphalt flow. Compared with existing technologies, this can achieve the effect of accelerating asphalt transport in the passive section without direct contact with the asphalt in the passive section. In addition, the active section of the peristaltic tube can be variable in diameter. When the asphalt transport efficiency slows down, the active section can be controlled to continuously change its diameter, which can effectively increase the asphalt throughput per unit time. At the same time, when restoring the inner diameter, it can automatically generate thrust along the direction of inclination from the outside towards the vertical conveyor, thereby further accelerating the transport efficiency of asphalt to the vertical conveyor. Attached Figure Description

[0024] Figure 1 This is a front perspective view of the first embodiment of this application;

[0025] Figure 2 This is a rear perspective view of the first embodiment of this application;

[0026] Figure 3 This is a top view of the first embodiment of this application;

[0027] Figure 4 This is a perspective view of the transition tube portion according to the first embodiment of this application;

[0028] Figure 5 This is a front view of the transition tube portion according to the first embodiment of this application;

[0029] Figure 6 This is a cross-sectional view of the peristaltic tube according to the first embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the peristaltic tube in the first embodiment of this application during peristalsis;

[0031] Figure 8 This is a schematic diagram of the peristaltic tube portion according to the second embodiment of this application;

[0032] Figure 9 This is a top view of the peristaltic tube according to the second embodiment of this application;

[0033] Figure 10 This is a schematic diagram of the radial cross-section of the peristaltic tube according to the second embodiment of this application;

[0034] Figure 11 This is a schematic diagram of the peristaltic tube portion according to the second embodiment of this application;

[0035] Figure 12 This is a top view of the peristaltic tube in the second embodiment of this application when it partially expands outward;

[0036] Figure 13 This is a radial diagram of the peristaltic tube during partial outward expansion according to the second embodiment of this application;

[0037] Explanation of the labels in the diagram:

[0038] 1 Horizontal conveyor, 11 Metering hopper, 101 Support, 102 Groove, 2 Vertical conveyor, 201 Base plate, 202 Discharge pipe, 3 Passive section, 4 Drive motor, 51 Fixed seat, 52 Electric push rod, 53 Positioning plate, 6 Active section, 61 Shaft-driven half-pipe, 611 Half-pipe skeleton, 612 Inner layer, 613 Unidirectional magnetic strip, 614 Outer layer, 62 Follower layer, 601 Rolling ball, 7 Heating ring, 81 Diameter control ring, 82 Connecting rod. Detailed Implementation

[0039] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] First implementation method:

[0041] Figure 1-2As shown in the two accompanying figures, the arrows indicate the direction of asphalt conveying. A metering and conveying device for modified asphalt includes a vertical conveyor 2, a horizontal conveyor 1 placed on a support 101, and a peristaltic tube connecting the lower end of the vertical conveyor 2 and the end of the horizontal conveyor 1. A control center is installed on the peristaltic tube. A base plate 201 is fixedly connected to the lower end of the vertical conveyor 2 and to the upper outer end of the vertical conveyor 2. The base plate 201 is fixed to the ground by multiple anchor bolts. Drive motors 4 are installed at the end of the horizontal conveyor 1 away from the vertical conveyor 2 and at the upper end of the vertical conveyor 2. Both the horizontal conveyor 1 and the vertical conveyor 2 are equipped with a horizontal auger and a vertical auger, respectively. The horizontal auger and the vertical auger are fixedly connected to the output end of the corresponding drive motor 4. The upper end of the horizontal conveyor 1 near the drive motor 4 is fixedly connected to a metering feed hopper 11. In use, a certain amount of asphalt can be fed into the horizontal conveyor 1 along the metering feed hopper 11. Then, under the action of the horizontal auger inside, it moves to the side of the peristaltic tube and then enters the vertical conveyor 2 through the peristaltic tube. Under the action of the vertical auger inside the vertical conveyor 2, it is transferred to the top of the vertical conveyor 2 and discharged through the discharge pipe 202.

[0042] like Figure 3 Both the discharge pipe 202 and the passive section 3 are inclined, which allows the asphalt to be transferred into the vertical conveyor 2 better. Moreover, the two are oriented in opposite directions. The angle between the passive section 3 and the horizontal conveyor 1 and the drive motor 4 is greater than 120°, which makes the angle at which the asphalt enters the peristaltic pipe from the horizontal conveyor 1 larger. It is less likely to cause local asphalt stagnation due to the small bend angle. Compared with the existing technology, it is easier to transfer the asphalt.

[0043] like Figure 4 The peristaltic tube includes a passive section 3 and an active section 6 fixedly embedded in the middle of the passive section 3. The passive section 3 and the active section 6 are coaxially arranged. An electric heating ring 7 is fixedly installed on the outer end of the passive section 3 facing the horizontal conveyor 1. Translation units are provided between the upper and lower ends of the active section 6 and the horizontal conveyor 1. The translation unit includes a fixed seat 51 fixedly connected to the horizontal conveyor 1, a positioning plate 53 fixedly connected to the middle of the active section 6, and an electric push rod 52 fixedly installed between the fixed seat 51 and the positioning plate 53. The electric heating ring 7 and the electric push rod 52 are both connected to the control center signal. The horizontal conveyor 1 and the lower electric push rod 52 are respectively chiseled with grooves 102. The electric push rod 52 moves through the grooves 102. The extension and retraction of the electric push rod 52 can achieve the effect of controlling the two axially moving half tubes 61 to move in opposite directions. Figure 5-6The active section 6 includes two symmetrical axially movable half tubes 61 and two follower layers 62 respectively fixedly connected between the corresponding ends of the two axially movable half tubes 61. The end faces of the two axially movable half tubes 61 that are close to each other are chiseled with arc-shaped long grooves. The two opposite arc-shaped long grooves are coaxially arranged, and multiple rolling balls 601 are placed inside them. The multiple rolling balls 601 are all located inside the follower layer 62. The passive section 3 and the follower layer 62 are both made of high-temperature resistant elastic material. The elasticity of the follower layer 62 and the passive section 3 can provide a certain space for the creep of the axially movable half tubes 61. The axially movable half tubes 61 are made of rigid material, and the inner surfaces of the follower layer 62 and the axially movable half tubes 61 are flush with each other. The inner surfaces of both are coated with a nano-coating.

[0044] like Figure 7 The two electric push rods 52 move in opposite directions and are both parallel to the passive section 3. When they start simultaneously, the two axially driven half-pipes 61 move in opposite directions. The lower axially driven half-pipe 61 moves toward the vertical conveyor 2, which moves the asphalt on it and accelerates the transfer of asphalt into the vertical conveyor 2. The upper axially driven half-pipe 61 moves toward the horizontal conveyor 1. The two axially driven half-pipes 61 move in opposite directions, which makes the peristaltic tube as a whole peristaltic. This can accelerate the transfer of asphalt between the horizontal conveyor 1 and the vertical conveyor 2 without direct contact with the asphalt, thus effectively avoiding the occurrence of local empty tubes at the vertical conveyor 2 and effectively ensuring transportation efficiency.

[0045] In the above-mentioned metering and conveying device for modified asphalt, by using the external translation unit and the electric heating ring 7 together, on the one hand, the fluidity of the asphalt in the passive section 3 can be improved in a targeted manner, and the transfer of asphalt into the vertical conveyor 2 can be accelerated. On the other hand, the active section 6 can be made to move dynamically along the direction of asphalt flow. Compared with the existing technology, it can achieve the effect of accelerating the conveying of asphalt in the passive section 3 without direct contact with the asphalt in the passive section 3.

[0046] Second implementation method:

[0047] This embodiment adds a unidirectional diameter expansion unit to the first embodiment, while the rest remains the same as the first embodiment.

[0048] Figure 8 As shown, a one-way diameter expansion unit is also provided outside the active section 6. The one-way diameter expansion unit includes a diameter control ring 81 sleeved outside the passive section 3 and two connecting rods 82 fixedly connected between the diameter control ring 81 and the two positioning plates 53. The diameter control ring 81 is coaxially arranged with the passive section 3, as shown. Figure 9-10The axially driven half-tube 61 includes a half-tube frame 611, an inner layer 612 fixedly connected to the inner wall of the half-tube frame 611 near the axis of the passive section 3, and multiple unidirectional magnetic strips 613 fixedly attached to the outer surface of the inner layer 612, such as... Figure 11 An outer cover 614 is fixedly connected to the outer surface of the unidirectional magnetic strip 613, and an inner cover 612 is a high-temperature resistant elastic sheet. Both the unidirectional magnetic strip 613 and the outer cover 614 are made of elastic materials. Along the direction away from the heating ring 7, the width of the unidirectional magnetic strip 613 gradually decreases, making the width on the side close to the diameter control ring 81 smaller. This makes it easier for the unidirectional magnetic strip 613 to bend outward when subjected to magnetic attraction. At the same time, it also makes the blank area of ​​the inner cover 612 corresponding to the diameter control ring 81 larger, which reduces the restriction on the bending of the unidirectional magnetic strip 613. This also makes it easier for the unidirectional magnetic strip 613 to bend outward when subjected to magnetic attraction, which facilitates the expansion of the diameter. Two adjacent outer covers 614 are close to each other but do not contact each other, and the width of the two ends of the outer cover 614 is the same. When the power is turned off and the unidirectional magnetic strip 613 recovers its deformation, the outer cover 614 is wider, which allows it to push the asphalt over a larger area and improve the asphalt transfer speed.

[0049] like Figure 12-13 The arrows in these two diagrams indicate the direction of the diameter change, while the direction of the force generated on the asphalt is the opposite of the diameter change direction. The narrow end of the unidirectional magnetic strip 613 is directly opposite the diameter control ring 81, and an iron sheet is fixedly embedded inside the narrow end of the unidirectional magnetic strip 613. Multiple electromagnetic plates corresponding to multiple unidirectional magnetic strips 613 are fixedly embedded inside the diameter control ring 81. The on / off state of the electromagnetic plates is connected to the control center signal. When energized, it can generate a magnetic attraction force on the corresponding unidirectional magnetic strip 613. When de-energized, the force of the unidirectional magnetic strip 613 to recover its deformation can tilt towards the vertical conveyor 2 to push the asphalt.

[0050] A metering and conveying device for modified asphalt, the transportation method of which includes the following steps:

[0051] S1. First, start the two drive motors 4 and start the electric heating ring 7 to heat the feeding side of the passive section 3. Then, add the asphalt into the horizontal conveyor 1 through the metering feed hopper 11. Under the action of the horizontal auger, the asphalt is transported to the end of the horizontal conveyor 1, and then passes through the passive section 3 to reach the vertical conveyor 2. Under the action of the vertical auger, the asphalt is lifted and then discharged at the discharge pipe 202.

[0052] S2. During the asphalt transportation process, the control center controls the two translational units to move in opposite directions alternately, thereby causing the two axial half-pipes 61 to move in opposite directions, presenting a back-and-forth misalignment state, thus making the asphalt in the passive section 3 dynamic.

[0053] S3. When the discharge speed at the discharge pipe 202 slows down significantly or discontinuous discharge occurs, control the two translational units to return to their initial state. At this time, the two axial half-pipes 61 are completely opposite to each other. Then, control the electromagnetic plate in the diameter control ring 81 to be energized, thereby attracting the unidirectional magnetic strip 613 outward, causing the active section 6 to expand outward. Maintain the expansion state for 5-10 seconds, and then control the electromagnetic plate to be de-energized, so that the unidirectional magnetic strip 613 quickly recovers its deformation, thereby generating extrusion force on the asphalt in the passive section 3.

[0054] S4. Repeatedly switching the electromagnetic plate on and off enables the rapid transfer of asphalt from the horizontal conveyor 1 to the vertical conveyor 2 without direct external contact with the asphalt.

[0055] In summary, by using the external translational unit and the electric heating ring 7 in combination, the fluidity of the asphalt in the passive section 3 can be improved in a targeted manner, accelerating the transfer of asphalt into the vertical conveyor 2. On the other hand, the active section 6 can be made to move dynamically along the direction of asphalt flow. Compared with the existing technology, it can achieve the effect of accelerating the asphalt transport in the passive section 3 without direct contact with the asphalt in the passive section 3. In addition, the active section 6 of the peristaltic tube can be variable in diameter. When the asphalt transport efficiency slows down, the active section 6 can be controlled to continuously change its diameter, which can effectively increase the asphalt throughput per unit time. At the same time, when restoring the inner diameter, it can automatically generate thrust along the direction of inclination 2 from the outside towards the vertical conveyor, thereby further accelerating the transport efficiency of asphalt to the vertical conveyor 2.

[0056] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A metering and conveying device for modified asphalt, characterized in that: The system includes a vertical conveyor (2), a horizontal conveyor (1) placed on a support (101), and a peristaltic tube connected between the lower end of the vertical conveyor (2) and the end of the horizontal conveyor (1). A control center is installed on the peristaltic tube. A base plate (201) is fixedly connected to the lower end of the vertical conveyor (2). A discharge pipe (202) is fixedly connected to the upper outer end of the vertical conveyor (2). The base plate (201) is fixed to the ground by multiple anchor bolts. A drive motor (4) is installed at the end of the horizontal conveyor (1) away from the vertical conveyor (2) and at the upper end of the vertical conveyor (2). A horizontal auger and a vertical auger are installed inside the horizontal conveyor (1) and the vertical conveyor (2), respectively. The horizontal auger and the vertical auger are fixedly connected to the output end of the corresponding drive motor (4). A metering feed hopper (11) is fixedly connected to the upper end of the horizontal conveyor (1) near the drive motor (4). The peristaltic tube includes a passive section (3) and an active section (6) fixedly embedded in the middle of the passive section (3). The passive section (3) and the active section (6) are coaxially arranged. An electric heating ring (7) is fixedly installed on the outer end of the passive section (3) facing the horizontal conveyor (1). Translation units are provided between the upper and lower ends of the active section (6) and the horizontal conveyor (1). The translation unit includes a fixed seat (51) fixedly connected to the horizontal conveyor (1), a positioning plate (53) fixedly connected to the middle of the active section (6), and an electric push rod (52) fixedly installed between the fixed seat (51) and the positioning plate (53). The electric heating ring (7) and the electric push rod (52) are both connected to the control center signal. A groove (102) is chiseled at the corresponding position of the horizontal conveyor (1) and the lower electric push rod (52). The electric push rod (52) moves through the groove (102). The active section (6) includes two symmetrical axially movable half tubes (61) and two follower layers (62) respectively fixedly connected between the corresponding ends of the two axially movable half tubes (61). The end faces of the two axially movable half tubes (61) that are close to each other are chiseled with arc-shaped long grooves. The two opposite arc-shaped long grooves are coaxially arranged, and multiple rolling balls (601) are placed inside them. The multiple rolling balls (601) are all located inside the follower layer (62). The two electric push rods (52) move in opposite directions, and both electric push rods (52) are arranged parallel to the passive section (3). The passive section (3) and the follower layer (62) are both made of high-temperature resistant elastic material.

2. The metering and conveying device for modified asphalt according to claim 1, characterized in that: The discharge pipe (202) and the passive section (3) are both inclined and have opposite orientations. The angle between the passive section (3) and the horizontal conveyor (1) on the side facing the drive motor (4) is greater than 120°.

3. The metering and conveying device for modified asphalt according to claim 1, characterized in that: The axially driven half tube (61) is made of a hard material, and the follower layer (62) and the inner surface of the axially driven half tube (61) are flush with each other, and both inner surfaces are coated with a nano-coating.

4. The metering and conveying device for modified asphalt according to claim 1, characterized in that: The active section (6) is also provided with a one-way diameter expansion unit. The one-way diameter expansion unit includes a diameter control ring (81) sleeved on the passive section (3) and two connecting rods (82) fixedly connected between the diameter control ring (81) and the two positioning plates (53). The diameter control ring (81) is coaxially arranged with the passive section (3).

5. The metering and conveying device for modified asphalt according to claim 4, characterized in that: The axially driven half tube (61) includes a half tube frame (611), an inner layer (612) fixedly connected to the inner wall of the half tube frame (611) near the axis of the passive section (3), and a plurality of unidirectional magnetic strips (613) fixedly attached to the outer surface of the inner layer (612). The outer surface of the unidirectional magnetic strips (613) is fixedly connected to an outer covering layer (614).

6. The metering and conveying device for modified asphalt according to claim 5, characterized in that: The inner layer (612) is a high-temperature resistant elastic sheet. The unidirectional magnetic strip (613) and the outer cover (614) are both made of elastic material. Along the direction away from the heating ring (7), the width of the unidirectional magnetic strip (613) gradually decreases. The two adjacent outer covers (614) are close to each other but do not contact each other, and the widths of the two ends of the outer cover (614) are the same.

7. The metering and conveying device for modified asphalt according to claim 6, characterized in that: The narrow end of the unidirectional magnetic strip (613) is directly opposite the diameter control ring (81), and an iron sheet is fixedly embedded inside the narrow end of the unidirectional magnetic strip (613). Multiple electromagnetic plates corresponding to multiple unidirectional magnetic strips (613) are fixedly embedded inside the diameter control ring (81), and the on / off state of the electromagnetic plates is connected to the control center signal.

8. The metering and conveying device for modified asphalt according to claim 7, characterized in that: Its transportation method includes the following steps: S1. First, start the two drive motors (4) and start the heating ring (7) to heat the feed side of the passive section (3). Then, add the asphalt into the horizontal conveyor (1) through the metering feed hopper (11). Under the action of the horizontal auger, the asphalt is transported to the end of the horizontal conveyor (1) and then passes through the passive section (3) to reach the vertical conveyor (2). Under the action of the vertical auger, the asphalt is lifted and then discharged at the discharge pipe (202). S2. During the asphalt transportation process, the control center controls the two translational units to move in opposite directions alternately, thereby causing the two axial half-pipes (61) to move in opposite directions and present a back-and-forth misalignment state, thereby making the asphalt in the passive section (3) dynamic. S3. When the discharge speed at the discharge pipe (202) slows down significantly or discontinuous discharge occurs, control the two translational units to return to their initial state. At this time, the two axial half-pipes (61) are completely opposite to each other. Then, control the electromagnetic plate in the diameter control ring (81) to be energized, thereby attracting the unidirectional magnetic strip (613) outward, causing the active section (6) to expand outward, maintaining the expansion state for 5-10 seconds, and then control the electromagnetic plate to be de-energized, causing the unidirectional magnetic strip (613) to quickly recover its deformation, thereby generating extrusion force on the asphalt in the passive section (3). S4. Repeatedly switching the electromagnetic plate on and off enables the rapid transfer of asphalt from the horizontal conveyor (1) to the vertical conveyor (2) without direct contact with the asphalt from the outside.

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