Variable pitch variable diameter auger and asphalt paver

Abstract

A variable-diameter variable-pitch spiral distributor, comprising a driving mechanism and a conveying mechanism, the conveying mechanism comprising a first spiral assembly, a second spiral assembly and a third spiral assembly which are sequentially connected, the driving mechanism being capable of driving the first spiral assembly, the second spiral assembly and the third spiral assembly to rotate respectively; the first spiral assembly comprises a first spiral shaft and a first spiral blade, and the driving mechanism is capable of driving the first spiral shaft to drive the first spiral blade to rotate; the second spiral assembly comprises a second spiral shaft and a second spiral blade, and the driving mechanism is capable of driving the second spiral shaft to drive the second spiral blade to rotate; the third spiral assembly comprises a third spiral shaft and a third spiral blade, and the driving mechanism is capable of driving the third spiral shaft to drive the third spiral blade to rotate; in addition, an asphalt paver is provided, comprising the spiral distributor. Different diameters and different pitches of spiral blades are provided to realize variable-diameter variable-pitch conveying of the spiral distributor on asphalt mixture.

Description

Technical Field

[0001] This utility model relates to the field of asphalt equipment, specifically to a variable diameter and variable pitch spiral distributor and an asphalt paver. Background Technology

[0002] Currently, asphalt pavers generally use traditional auger spreaders, whose structure typically includes a auger blade with a fixed diameter and pitch, driven by a drive unit to rotate and transport the asphalt mixture stored in the hopper to the paving area. Some designs may use spliced ​​blades, but usually a relatively fixed integral design is used. With this design, the speed and pitch of the blades often remain constant during the process of transporting the mixture from the end of the hopper to the discharge end. During the transport of the asphalt mixture, due to centrifugal force and gravity, coarse aggregate tends to gather on the outside, while fine aggregate tends to remain on the inside, forming radial segregation. At the same time, the integral blades cannot adapt to the changes in the state of the mixture from the hopper outlet to the paving edge, which easily leads to axial segregation.

[0003] Patent CN120250435B discloses an asphalt paver for road paving, including a paver body and an output trough. The bottom surfaces of the two outer shells are equipped with a turning mechanism for dragging and steering. The inner surface of the turning mechanism has an opening mechanism to control the output amount at different positions. The inner surface of the output trough has a spreading mechanism for scraping and evenly spreading asphalt. The outer surface of the spreading mechanism has a deflection mechanism to adjust the scraping frequency according to the direction of steering. The output trough can follow the paver's turns, and the rotation direction of the opening mechanism is adjusted according to the turning direction, forming a trapezoidal gap between the opening side plates. This ensures that the area swept at different positions matches the amount of asphalt output, achieving uniform distribution of asphalt during turning paving. However, the threaded conveyor rod of this device is still a fixed integral design, and the pitch and diameter of its blades remain unchanged during the conveying of the mixture, still resulting in radial and axial segregation problems. Utility Model Content

[0004] This utility model provides a variable diameter and variable pitch auger and asphalt paver. It solves the defects in the prior art by setting up a multi-stage drive assembly, a segmented auger shaft and segmented auger blades connected to the multi-stage drive assembly, a height sensor and a temperature sensor installed on the auger shaft, and setting auger blades with different diameters and different pitches.

[0005] In a first aspect, this utility model provides a variable diameter and variable pitch spiral fabric feeder, comprising a drive mechanism and a conveying mechanism, wherein the conveying mechanism is connected to the drive mechanism, and the conveying mechanism includes a first spiral assembly, a second spiral assembly, and a third spiral assembly connected sequentially, wherein the drive mechanism can drive the first spiral assembly, the second spiral assembly, and the third spiral assembly to rotate respectively; the first spiral assembly includes a first spiral shaft and a first spiral blade, the first spiral blade being mounted on the first spiral shaft, the first spiral shaft being connected to the drive mechanism, and the drive mechanism can drive the first spiral shaft to drive the first spiral blade to rotate; the second spiral assembly includes a second spiral shaft and a second spiral blade, the second spiral blade being mounted on the second spiral shaft. The second spiral shaft is connected to a drive mechanism, which drives the second spiral shaft to rotate the second spiral blades. The third spiral assembly includes a third spiral shaft and third spiral blades. The third spiral blades are mounted on the third spiral shaft, which is connected to the drive mechanism. The drive mechanism drives the third spiral shaft to rotate the third spiral blades. The diameters of the first, second, and third spiral blades are unequal, and their pitches are also unequal. In the spiral feeder, the area where the first spiral assembly is located is the feeding section, the area where the second spiral assembly is located is the transition section, and the area where the third spiral assembly is located is the discharge section.

[0006] Preferably, the drive mechanism includes a first force-applying component, a second force-applying component, and a third force-applying component, which are respectively connected to a first helical shaft, a second helical shaft, and a third helical shaft. By setting the first force-applying component, the second force-applying component, and the third force-applying component, the drive mechanism can precisely control and adjust the motion state and motion parameters of the first helical component, the second helical component, and the third helical component, thus initially establishing a multi-level drive working mode.

[0007] Preferably, the first force-applying component includes a first power source and a first transmission component connected in sequence. The first transmission component is connected to a first spiral shaft, and the first power source can drive the first transmission component to rotate the first spiral shaft. The second force-applying component includes a second power source and a second transmission component connected in sequence. The third force-applying component includes a third power source and a third transmission component connected in sequence. The second transmission component is connected to a second spiral shaft, and the third transmission component is connected to a third spiral shaft. The second power source can drive the second transmission component to rotate the second spiral shaft, and the third power source can drive the third transmission component to rotate the third spiral shaft. By setting the first power source, first transmission component, second power source, second transmission component, third power source, and third transmission component, the first force-applying component, second force-applying component, and third force-applying component can respectively output the required rotational speed and torque of the first spiral blade, second spiral blade, and third spiral blade, so that the rotation of the first spiral shaft, second spiral shaft, and third spiral shaft can better adapt to the working conditions of the feeding section, transition section, and discharge section.

[0008] More preferably, the first power source, the second power source, and the third power source are all permanent magnet synchronous motors, and the first transmission component, the second transmission component, and the third transmission component are all planetary gear reducers. The permanent magnet synchronous motor can adjust the speed range and control the speed accuracy, and the planetary gear reducer can convert the high speed of the motor into the low speed and high torque required by the first helical blade, the second helical blade, and the third helical blade respectively.

[0009] Preferably, the second force-applying component further includes a first protective component disposed outside the second power source and outside the second transmission component. A first bearing seat is disposed on one side of the first protective component, and the second transmission component is rotatably connected to the second screw shaft via the first bearing seat. The third force-applying component further includes a second protective component disposed outside the third power source and outside the third transmission component. A second bearing seat is disposed on one side of the second protective component, and the third transmission component is rotatably connected to the third screw shaft via the second bearing seat. By providing the first protective component, the first bearing seat, the second protective component, and the second bearing seat, the second and third force-applying components can reduce the impact of asphalt mixture on the drive mechanism under high-temperature environments. The first and second protective components have functions of dustproofing, waterproofing, preventing material impact, and protecting electrical components.

[0010] More preferably, a third bearing seat is provided on the side of the first protective member away from the first bearing seat, and a fourth bearing seat is provided on the side of the second protective member away from the second bearing seat. The third bearing seat is connected to the first spiral shaft, and the fourth bearing seat is connected to the second spiral shaft. The first force-applying component and the end of the third spiral shaft away from the third force-applying component are both installed on an external mechanism (such as the frame of an asphalt paver), which improves the stability of the conveying mechanism when it rotates.

[0011] Preferably, the pitch of the second helical blade decreases linearly from the end near the first helical shaft toward the end toward the third helical shaft, while the pitches of the first and third helical blades remain unchanged, and the pitches of the first and third helical blades are not equal.

[0012] Preferably, the pitch of the first helical blade is 150-200 mm, the pitch of the second helical blade decreases linearly from 180 mm to 120 mm, and the pitch of the third helical blade is 100-140 mm. By optimizing the pitch values ​​of the first, second, and third helical blades, the first helical blade in the feeding section can quickly convey the mixture forward with a larger pitch, the second helical blade in the transition section can gradually slow down and spread the mixture by decreasing the pitch, reducing the centrifugal aggregation of coarse aggregates, and the third helical blade in the discharge section can evenly distribute the mixture forward with a smaller pitch, significantly reducing radial and axial segregation.

[0013] Preferably, the diameter of the second helical blade increases linearly from the end near the first helical axis toward the end toward the third helical axis, while the diameters of the first and third helical blades remain unchanged, and the diameters of the first and third helical blades are not equal.

[0014] Preferably, the diameter of the first helical blade is 250–300 mm, the diameter of the second helical blade increases linearly from 300 mm to 380 mm, and the diameter of the third helical blade is 360–400 mm. By optimizing the diameters of the first, second, and third helical blades, the first helical blade in the feeding section can quickly convey the mixture forward with a smaller diameter, the second helical blade in the transition section can gradually slow down and spread the mixture and reduce the centrifugal aggregation of coarse aggregates by increasing the diameter, and the third helical blade in the discharge section can evenly distribute the mixture forward with a larger diameter, significantly reducing radial and axial segregation.

[0015] Preferably, the variable diameter and variable pitch screw distributor further includes a measuring component mounted on the conveying mechanism. The measuring component includes a height sensor and a temperature sensor. The height sensor detects the accumulation height of the asphalt mixture, and the temperature sensor detects the temperature of the asphalt mixture. By incorporating the height and temperature sensors, the screw distributor can coordinate the control and adjustment of the first, second, and third force-applying components on the first, second, and third screw components based on the accumulation height and temperature of the asphalt mixture in the feeding section, transition section, and discharge section, respectively.

[0016] More preferably, the height sensor is an ultrasonic sensor and the temperature sensor is an infrared temperature sensor. The height sensor can more accurately measure the real-time accumulation height of the asphalt mixture in the feeding section, transition section, and discharge section, and the temperature sensor can more accurately measure the real-time temperature of the asphalt mixture in the feeding section, transition section, and discharge section. The ultrasonic sensor and the temperature sensor ensure the timeliness and accuracy of the drive mechanism control and adjustment.

[0017] A second aspect of this utility model provides an asphalt paver, including a variable diameter and variable pitch auger provided in any implementation of the first aspect.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. In this utility model, by designing a multi-stage driven segmented mode, and by setting a first force-applying component and a first spiral component corresponding to the feeding section, a second force-applying component and a second spiral component corresponding to the transition section, and a third force-applying component and a third spiral component corresponding to the discharge section, the conveying of asphalt mixture in each section can be precisely controlled, and the power of a certain section can be cut off according to the operation requirements to realize segmented start and stop.

[0020] 2. In this utility model, by designing blades with variable diameter and pitch, and by setting first spiral blades, second spiral blades, and third spiral blades with different pitches and diameters, the working mode of the blades on the conveying path is more in line with the movement law of asphalt mixture, effectively suppressing the axial and radial segregation of asphalt mixture, improving the uniformity of material distribution, and making it suitable for efficient paving operations of various asphalt mixtures.

[0021] 3. In this utility model, by setting up height and temperature detection components, and by setting up height sensors installed at intervals on the spiral shaft and temperature sensors installed at intervals at the root of the spiral blades, the real-time accumulation height and temperature of the asphalt mixture in each section can be fed back to the drive mechanism and the operator. Based on the real-time accumulation height and temperature of the asphalt mixture in each section, the motion state and motion parameters of each section can be adaptively adjusted, thereby improving the fault tolerance rate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1This is a schematic diagram of the overall structure of a variable diameter and variable pitch spiral feeder provided by this utility model.

[0024] Figure 2 This is a schematic diagram of the overall structure of a variable diameter and variable pitch spiral feeder provided by this utility model from another perspective.

[0025] Figure 3 This is a schematic diagram of the drive mechanism and conveying mechanism in a variable diameter and variable pitch spiral fabric feeder provided by this utility model.

[0026] Figure 4 This is a schematic diagram of the drive mechanism in a variable diameter and variable pitch spiral fabric feeder provided by this utility model.

[0027] Figure 5 This is a schematic diagram of the conveying mechanism and detection components in a variable diameter and variable pitch spiral fabric feeder provided by this utility model.

[0028] In the diagram: 1. Drive mechanism; 2. Conveying mechanism; 3. Detection component; 11. First force application component; 12. Second force application component; 13. Third force application component; 21. First spiral component; 22. Second spiral component; 23. Third spiral component; 31. Height sensor; 32. Temperature sensor; 111. First power source; 112. First transmission component; 121. Second power source; 122. Second transmission component; 123. First protective component; 131. Third power source; 132. Third transmission component; 133. Second protective component; 211. First spiral shaft; 212. First spiral blade; 221. Second spiral shaft; 222. Second spiral blade; 231. Third spiral shaft; 232. Third spiral blade; 1231. First bearing seat; 1232. Third bearing seat; 1331. Second bearing seat; 1332. Fourth bearing seat. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0033] Please see Figures 1 to 5This utility model provides a variable diameter and variable pitch spiral fabric feeder, including a drive mechanism 1 and a conveying mechanism 2. The conveying mechanism 2 is connected to the drive mechanism 1. The conveying mechanism includes a first spiral assembly 21, a second spiral assembly 22, and a third spiral assembly 23 connected in sequence. The drive mechanism 1 can drive the first spiral assembly 21, the second spiral assembly 22, and the third spiral assembly 23 to rotate respectively. The first spiral assembly 21 includes a first spiral shaft 211 and a first spiral blade 212. The first spiral blade 212 is mounted on the first spiral shaft 211. The first spiral shaft 211 is connected to the drive mechanism 1, and the drive mechanism 1 can drive the first spiral shaft 211 to drive the first spiral blade 212 to rotate. The second spiral assembly 22 includes a second spiral shaft 221 and a second spiral blade 222. The second spiral blade 222 is mounted on the second spiral shaft 221. Shaft 221 is connected to drive mechanism 1, which can drive the second spiral shaft 221 to rotate the second spiral blade 222; the third spiral assembly 23 includes a third spiral shaft 231 and a third spiral blade 232, the third spiral blade 232 is mounted on the third spiral shaft 231, the third spiral shaft 231 is connected to drive mechanism 1, and drive mechanism 1 can drive the third spiral shaft 231 to rotate the third spiral blade 232; the diameters of the first spiral blade 212, the second spiral blade 222, and the third spiral blade 232 are not equal, and the pitches of the first spiral blade 212, the second spiral blade 222, and the third spiral blade 232 are not equal; in the spiral feeder, the area where the first spiral assembly 21 is located is the feeding section, the area where the second spiral assembly 22 is located is the transition section, and the area where the third spiral assembly 23 is located is the discharge section.

[0034] Please see Figures 1 to 3 The drive mechanism 1 includes a first force-applying component 11, a second force-applying component 12, and a third force-applying component 13, which are respectively connected to a first helical shaft 211, a second helical shaft 221, and a third helical shaft 231. By setting the first force-applying component 11, the second force-applying component 12, and the third force-applying component 13, the drive mechanism 1 can precisely control and adjust the motion state and motion parameters of the first helical component 21, the second helical component 22, and the third helical component 23, thus initially establishing a multi-stage drive working mode.

[0035] Specifically, the first force-applying component 11, the first spiral shaft 211, the second force-applying component 12, the second spiral shaft 221, the third force-applying component 13, and the third spiral shaft 231 are connected in sequence. The first force-applying component 11 is rotatably connected to the first spiral shaft 211, the second force-applying component 12 is rotatably connected to the second spiral shaft 221, and the third force-applying component 13 is rotatably connected to the third spiral shaft 231. The feeding section is located between the first force-applying component 11 and the second force-applying component 12, the transition section is located between the second force-applying component 12 and the third force-applying component 13, and the discharge section is located on the side of the third force-applying component 13 facing the third spiral shaft 231. During operation, the first force-applying component 11 can independently drive the first spiral shaft 211 to rotate the first spiral blade 212, which transports the asphalt mixture from the feeding section to the transition section; the second force-applying component 12 can independently drive the second spiral shaft 221 to rotate the second spiral blade 222, which transports the asphalt mixture from the transition section to the discharge section; the third force-applying component 13 can independently drive the third spiral shaft 231 to rotate the third spiral blade 232, which transports the asphalt mixture from the discharge section to the external environment for paving.

[0036] Please see Figure 3 and Figure 4 The first force-applying component 11 includes a first power source 111 and a first transmission component 112 connected in sequence. The first transmission component 112 is connected to the first spiral shaft 211. The first power source 111 can drive the first transmission component 112 to rotate the first spiral shaft 211. The second force-applying component 12 includes a second power source 121 and a second transmission component 122 connected in sequence. The third force-applying component 13 includes a third power source 131 and a third transmission component 132 connected in sequence. The second transmission component 122 is connected to the second spiral shaft 221, and the third transmission component 132 is connected to the third spiral shaft 231. The second power source 121 can drive the second transmission component 122 to rotate the second spiral shaft 221, and the third power source 131 can drive the third transmission component 132 to rotate the third spiral shaft 231. By setting up a first power source 111, a first transmission component 112, a second power source 121, a second transmission component 122, a third power source 131, and a third transmission component 132, the first force application component 11, the second force application component 12, and the third force application component 13 can respectively output the required rotational speed and torque of the first spiral blade 212, the second spiral blade 222, and the third spiral blade 232, so that the rotation of the first spiral shaft 211, the second spiral shaft 221, and the third spiral shaft 231 can better adapt to the working conditions of the feeding section, the transition section, and the discharge section.

[0037] Specifically, the first power source 111, the second power source 121, and the third power source 131 are all 7.5KW permanent magnet synchronous motors with a speed range of 0-300r / min. The first transmission component 112, the second transmission component 122, and the third transmission component 132 are all planetary gear reducers with a transmission ratio of 1:10 to 1:15. The permanent magnet synchronous motors have adjustable speed range and controllable speed accuracy. The planetary gear reducers can convert the high speed of the motor into the low speed and high torque required by the first helical blade 212, the second helical blade 222, and the third helical blade 232. The first power source 111 is rotatably connected to the first helical shaft 211 through the first transmission component 112, the second power source 121 is rotatably connected to the second helical shaft 221 through the second transmission component 122, and the third power source 131 is rotatably connected to the third helical shaft 231 through the third transmission component 132. During operation, the first power source 111 drives the first spiral shaft 211 to rotate the first spiral blade 212 via the first transmission component 112, and the first spiral blade 212 transports the asphalt mixture from the feeding section to the transition section; the second power source 121 drives the second spiral shaft 221 to rotate the second spiral blade 222 via the second transmission component 122, and the second spiral blade 222 transports the asphalt mixture from the transition section to the discharge section; the third power source 131 drives the third spiral shaft 231 to rotate the third spiral blade 232 via the third transmission component 132, and the third spiral blade 232 then transports the asphalt mixture from the discharge section to the external environment.

[0038] Please see Figure 3 and Figure 4 The second force-applying component 12 further includes a first protective member 123 disposed outside the second power source 121 and outside the second transmission member 122. A first bearing seat 1231 is disposed on one side of the first protective member 123, and the second transmission member 122 is rotatably connected to the second screw shaft 221 through the first bearing seat 1231. The third force-applying component 13 further includes a second protective member 133 disposed outside the third power source 131 and outside the third transmission member 132. A second bearing seat 1331 is disposed on one side of the second protective member 133, and the third transmission member 132 is rotatably connected to the third screw shaft 231 through the second bearing seat 1331. By setting the first protective member 123, the first bearing seat 1231, the second protective member 133, and the second bearing seat 1331, the second force-applying component 12 and the third force-applying component 13 can reduce the impact of asphalt mixture on the drive mechanism 1 under high temperature environment. The first protective member 123 and the second protective member 133 have the functions of dustproof, waterproof, material impact protection, and protection of electrical components.

[0039] Specifically, a third bearing seat 1232 is provided on the side of the first protective component 123 away from the first bearing seat 1231, and a fourth bearing seat 1332 is provided on the side of the second protective component 133 away from the second bearing seat 1331. The third bearing seat 1232 is connected to the first spiral shaft 211, and the fourth bearing seat 1332 is connected to the second spiral shaft 221. The ends of the first force-applying component 11 and the third spiral shaft 231 away from the third force-applying component 13 are both installed on an external mechanism (such as the frame of an asphalt paver), which improves the stability of the conveying mechanism 2 when it rotates. During operation, the first spiral shaft 211 rotates under the drive of the first power source 111, with the third bearing seat 1232 serving to fix and assist rotation; the second spiral shaft 221 rotates under the drive of the first bearing seat 1231, with the fourth bearing seat 1332 serving to fix and assist rotation; the third spiral shaft 231 rotates under the drive of the second bearing seat 1331; the ends of the first force-applying component 11 and the third spiral shaft 231 opposite to the third force-applying component 13 are both mounted on external mechanisms (such as the frame of an asphalt paver), therefore the first force-applying component 11 does not require additional protective components. The first protective component 123 and the second protective component 133 are welded from steel plates, which can prevent the high-temperature asphalt mixture from affecting the drive mechanism 1 during operation, and can effectively protect the first power source 111 and the first transmission component 112 inside the first protective component 123, and the second power source 121 and the second transmission component 122 inside the second protective component 133.

[0040] Please see Figures 1 to 5 The pitch of the second helical blade 222 decreases linearly from the end near the first helical shaft 211 towards the end towards the third helical shaft 231. The pitches of the first helical blade 212 and the third helical blade 232 remain unchanged, but their pitches are not equal. Based on the above, the pitch of the first helical blade 212 is 150–200 mm, the pitch of the second helical blade 222 decreases linearly from 180 mm to 120 mm, and the pitch of the third helical blade 232 is 100–140 mm. By optimizing the pitch values ​​of the first helical blade 212, the second helical blade 222, and the third helical blade 232, the first helical blade 212 in the feeding section can quickly convey the mixture forward with a larger pitch, the second helical blade 222 in the transition section can gradually slow down and spread the mixture by decreasing the pitch, and reduce the centrifugal aggregation of coarse aggregates, and the third helical blade 232 in the discharge section can evenly distribute the mixture forward with a smaller pitch, thus significantly reducing radial and axial segregation.

[0041] Please see Figures 1 to 5The diameter of the second helical blade 222 increases linearly from the end near the first helical shaft 211 towards the end towards the third helical shaft 231. The diameters of the first helical blade 212 and the third helical blade 232 remain constant, but their diameters are not equal. Based on the above, the diameter of the first helical blade 212 is 250–300 mm, the diameter of the second helical blade 222 increases linearly from 300 mm to 380 mm, and the diameter of the third helical blade 232 is 360–400 mm. By optimizing the diameters of the first helical blade 212, the second helical blade 222, and the third helical blade 232, the first helical blade 212 in the feeding section can quickly convey the mixture forward with a smaller diameter, the second helical blade 222 in the transition section can gradually slow down and spread the mixture and reduce the centrifugal aggregation of coarse aggregates by increasing the diameter, and the third helical blade 232 in the discharge section can evenly distribute the mixture forward with a larger diameter, thus significantly reducing radial and axial segregation.

[0042] Specifically, asphalt mixture enters the feeding section of the auger from the external environment. Driven by the first force application component 11, the first auger blade 212 rotates under the drive of the first auger shaft 211, rapidly conveying the mixture forward with a relatively large pitch of 150-200mm, thus preventing accumulation of asphalt mixture at the outlet of the external asphalt mixture supply equipment. When the asphalt mixture enters the transition section, driven by the second force application component 12, the second auger blade 222 rotates under the drive of the second auger shaft 221, with the blade diameter linearly increasing from 300mm. The pitch decreases linearly from 180mm to 120mm, reaching 380mm. Under the impetus of the blades with decreasing pitch and increasing diameter, the asphalt mixture gradually decelerates and diffuses outward, reducing the centrifugal aggregation of coarse aggregates. When the asphalt mixture enters the discharge section, driven by the third force application component 13, the third helical blade 232 rotates under the drive of the third helical shaft 231. At this time, the blade diameter reaches 360-400mm, and the pitch decreases to 100-140mm. Under the action of the blades with larger diameter and smaller pitch, the asphalt mixture is evenly distributed to the edge of the paving area in the external environment.

[0043] Please see Figure 2 and Figure 5The variable diameter and variable pitch spiral distributor also includes a measuring component 3, which is mounted on the conveying mechanism 2. The measuring component 3 includes a height sensor 31 and a temperature sensor 32. The height sensor 31 can detect the accumulation height of the asphalt mixture, and the temperature sensor 32 can detect the temperature of the asphalt mixture. By setting the height sensor 31 and the temperature sensor 32, the spiral distributor can coordinate the control and adjustment of the first force application component 11, the second force application component 12, and the third force application component 13 on the first spiral component 21, the second spiral component 22, and the third spiral component 23 according to the accumulation height and temperature of the asphalt mixture in the feeding section, the transition section, and the discharge section.

[0044] Specifically, the height sensor 31 is an ultrasonic sensor, and the temperature sensor 32 is an infrared temperature sensor. The height sensor 31 can more accurately measure the real-time accumulation height of the asphalt mixture in the feeding section, transition section, and discharge section, and the temperature sensor 32 can more accurately measure the real-time temperature of the asphalt mixture in the feeding section, transition section, and discharge section. The ultrasonic sensor and the temperature sensor ensure the timeliness and accuracy of the control and adjustment of the drive mechanism 1. A height sensor 31 is installed at one end of the first spiral shaft 211 near the second force-applying component 12, at one end of the second spiral shaft 221 near the second force-applying component 12, and at one end of the third spiral shaft 231 near the third force-applying component 13. The distance between adjacent height sensors 31 is 800-1200 mm. Three to four temperature sensors 32 are installed on the first spiral shaft 211 at the root of the first spiral blade 212, on the second spiral shaft 221 at the root of the second spiral blade 222, and on the third spiral shaft 231 at the root of the third spiral blade 232. During operation, the height sensor 31 and temperature sensor 32 in the measuring component 3 collect the asphalt mixture accumulation height and temperature in the feeding section in real time. When the asphalt mixture enters the transition section, if the asphalt mixture level in the feeding section is too high, the speed of the transition section can be increased to speed up the conveying. If the temperature is too low, the speed can be appropriately reduced to avoid the accumulation phenomenon caused by the poor fluidity of the asphalt mixture. The speed of the discharge section is dynamically adjusted according to the amount of asphalt mixture output from the transition section and the paving width to ensure the uniformity of the material distribution.

[0045] The working principle of the variable diameter and variable pitch spiral feeder:

[0046] 1. When the asphalt mixture is transported from the external environment to the feeding section, the first power source 111 in the first force application component 11 of the feeding section drives the first spiral shaft 211 to rotate through the first transmission component 112. Under the drive of the first spiral shaft 211, the first spiral blade 212 rapidly transports the asphalt mixture forward to the transition section through the blade pitch of 150-200mm and the blade diameter of 250-300mm, so as to avoid the accumulation of asphalt mixture at the outlet of the equipment that provides asphalt mixture from the outside. At the same time, the height sensor 31 and the temperature sensor 32 in the detection component 3 detect the accumulation height and temperature of the asphalt mixture in the feeding section in real time.

[0047] 2. After the asphalt mixture enters the transition section from the feeding section, the second power source 121 in the second force application component 12 of the transition section drives the second spiral shaft 221 to rotate through the second transmission component 122. Driven by the second spiral shaft 221, the second spiral blades 222 transport the asphalt mixture to the discharge section by increasing the blade diameter linearly from 300mm to 380mm and decreasing the blade pitch linearly from 180mm to 120mm. During the above process, the asphalt mixture gradually diffuses outward under the push of the blades. At the same time, the height sensor 31 and temperature sensor 32 in the detection component 3 detect the accumulation height and temperature of the asphalt mixture in the transition section in real time and compare them with the accumulation height and temperature of the feeding section. If the material level of the asphalt mixture in the feeding section is too high, the rotation speed can be increased to speed up the conveying. If the temperature is too low, the rotation speed can be appropriately reduced to avoid the accumulation phenomenon caused by the poor fluidity of the asphalt mixture.

[0048] 3. After the asphalt mixture enters the discharge section from the transition section, the third power source 131 in the third force application component 13 of the discharge section drives the third spiral shaft 231 to rotate through the third transmission component 132. Under the drive of the third spiral shaft 231, the third spiral blades 232, with a blade diameter of 360-400 mm and a blade pitch of 100-140 mm, transport the asphalt mixture to the paving area of ​​the external environment. During the above process, the asphalt mixture is evenly distributed to the edge of the paving area under the action of the larger diameter blades. At the same time, the height sensor 31 and temperature sensor 32 in the detection component 3 detect the accumulation height and temperature of the asphalt mixture in the discharge section in real time. The rotation speed of the third power source 131 in the discharge section is dynamically adjusted according to the amount of asphalt mixture output from the transition section and the paving width to ensure uniform distribution.

[0049] 4. Throughout the entire process of feeding section, transition section and discharge section, the operator can cut off the power of a certain section of the blade according to the operation requirements and detection data to realize segmented start and stop, and adjust the motion parameters of a certain section of the blade when necessary, so as to achieve efficient and uniform asphalt paving operation.

[0050] This utility model also provides an asphalt paver, including the one described in this embodiment. Figures 1 to 5 The variable diameter and variable pitch spiral feeder provided by any of the implementation methods shown has all the technical effects of the variable diameter and variable pitch spiral feeder mentioned above, and will not be repeated here.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable diameter and variable pitch spiral fabric feeder, comprising a drive mechanism (1) and a conveying mechanism (2), wherein the conveying mechanism (2) is connected to the drive mechanism (1), characterized in that, The conveying mechanism (2) includes a first spiral assembly (21), a second spiral assembly (22), and a third spiral assembly (23) connected in sequence. The driving mechanism (1) can drive the first spiral assembly (21), the second spiral assembly (22), and the third spiral assembly (23) to rotate respectively. The first spiral assembly (21) includes a first spiral shaft (211) and a first spiral blade (212). The first spiral blade (212) is mounted on the first spiral shaft (211). The first spiral shaft (211) is connected to a drive mechanism (1). The drive mechanism (1) can drive the first spiral shaft (211) to rotate the first spiral blade (212). The second spiral assembly (22) includes a second spiral shaft (221) and a second spiral blade (222). The second spiral blade (222) is mounted on the second spiral shaft (221). The second spiral shaft (221) is connected to the drive mechanism (1). The drive mechanism (1) can drive the second spiral shaft (221) to rotate the second spiral blade (222). The third helical assembly (23) includes a third helical shaft (231) and a third helical blade (232). The third helical blade (232) is mounted on the third helical shaft (231). The third helical shaft (231) is connected to the drive mechanism (1). The drive mechanism (1) can drive the third helical shaft (231) to rotate the third helical blade (232). The diameters of the first helical blade (212), the second helical blade (222), and the third helical blade (232) are not equal, and the pitches of the first helical blade (212), the second helical blade (222), and the third helical blade (232) are not equal.

2. The variable diameter and variable pitch spiral feeder according to claim 1, characterized in that, The drive mechanism (1) includes a first force-applying component (11), a second force-applying component (12), and a third force-applying component (13), which are respectively connected to a first spiral shaft (211), a second spiral shaft (221), and a third spiral shaft (231).

3. A variable diameter and variable pitch spiral feeder according to claim 2, characterized in that, The first force application component (11) includes a first power source (111) and a first transmission component (112) connected in sequence. The first transmission component (112) is connected to a first spiral shaft (211). The first power source (111) can drive the first transmission component (112) to drive the first spiral shaft (211) to rotate. The second force-applying component (12) includes a second power source (121) and a second transmission component (122) connected in sequence. The third force-applying component (13) includes a third power source (131) and a third transmission component (132) connected in sequence. The second transmission component (122) is connected to the second spiral shaft (221), and the third transmission component (132) is connected to the third spiral shaft (231). The second power source (121) can drive the second transmission component (122) to rotate the second spiral shaft (221), and the third power source (131) can drive the third transmission component (132) to rotate the third spiral shaft (231).

4. A variable diameter and variable pitch spiral feeder according to claim 3, characterized in that, The second force application component (12) also includes a first protective component (123) disposed outside the second power source (121) and outside the second transmission component (122). A first bearing seat (1231) is disposed on one side of the first protective component (123), and the second transmission component (122) is rotatably connected to the second helical shaft (221) through the first bearing seat (1231). The third force application component (13) also includes a second protective component (133) disposed outside the third power source (131) and outside the third transmission component (132). A second bearing seat (1331) is provided on one side of the second protective component (133), and the third transmission component (132) is rotatably connected to the third spiral shaft (231) through the second bearing seat (1331).

5. A variable diameter and variable pitch spiral feeder according to claim 2, characterized in that, The pitch of the second helical blade (222) decreases linearly from the end near the first helical shaft (211) toward the end toward the third helical shaft (231). The pitches of the first helical blade (212) and the third helical blade (232) remain unchanged. The pitches of the first helical blade (212) and the third helical blade (232) are not equal.

6. A variable diameter and variable pitch spiral feeder according to claim 5, characterized in that, The pitch of the first helical blade (212) is 150-200 mm, the pitch of the second helical blade (222) decreases linearly from 180 mm to 120 mm, and the pitch of the third helical blade (232) is 100-140 mm.

7. A variable diameter and variable pitch spiral feeder according to claim 2, characterized in that, The diameter of the second helical blade (222) increases linearly from the end near the first helical shaft (211) toward the end toward the third helical shaft (231). The diameters of the first helical blade (212) and the third helical blade (232) remain unchanged. The diameters of the first helical blade (212) and the third helical blade (232) are not equal to each other.

8. A variable diameter and variable pitch spiral feeder according to claim 7, characterized in that, The diameter of the first helical blade (212) is 250-300 mm, the diameter of the second helical blade (222) increases linearly from 300 mm to 380 mm, and the diameter of the third helical blade (232) is 360-400 mm.

9. A variable diameter and variable pitch spiral feeder according to claim 2, characterized in that, The variable diameter and variable pitch spiral distributor also includes a measuring component (3), which is mounted on the conveying mechanism (2). The measuring component (3) includes a height sensor (31) and a temperature sensor (32). The height sensor (31) can detect the stacking height of the asphalt mixture, and the temperature sensor (32) can detect the temperature of the asphalt mixture.

10. An asphalt paver, characterized in that, The invention includes a variable diameter and variable pitch spiral feeder according to any one of claims 1 to 9.

Images