Asphalt rapid preheating and laying device for pavement bridge
By setting a first-level heat exchanger on the compacting roller of the asphalt laying device of the pavement bridge and setting a heat exchanger on the screw conveying parts, the heat of the compacting roller is used to preheat the screw conveying parts, and the asphalt mixture at low temperatures in winter is solved. The problem of hardening has achieved smooth paving of asphalt mixture and improved pavement quality.
Patent Information
- Application Number
- CN202411769491.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-02-21
AI Technical Summary
Under low temperature conditions in winter, the asphalt mixture is prone to hardening in the spiral conveying parts, resulting in poor density of asphalt mixture on the road surface in the later stage and prone to quality problems such as cracking.
A rapid preheating and laying device for pavement bridges is designed, including a first-level heat exchanger on the compacting roller, and a heat exchange tube on the spiral blades and discharge barrel of the screw conveying member, and a residual use of the compacting roller The asphalt mixture and the generated heat heat exchange medium are heated, thereby preheating the screw conveying member.
Effectively reduce the temperature difference between the spiral conveying parts and the asphalt storage part, avoid the solidification of the asphalt mixture in the spiral conveying parts, ensure the smooth laying of the asphalt mixture, and avoid the quality problems such as cracking of the pavement asphalt mixture in the later stage. .
Smart Images
Figure CN119491440A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of preheating devices, and in particular to a device for quickly preheating and paving asphalt for road surfaces and bridges. Background Art
[0002] Asphalt is commonly used as a paving material for roads and bridges. An asphalt paving machine is required for paving asphalt pavements. The asphalt paving machine includes an asphalt storage section for storing asphalt mixture. A heating section is provided in the asphalt storage section for keeping the asphalt mixture warm to prevent the temperature of the asphalt mixture from being lower than the required temperature before paving. The asphalt mixture in the asphalt storage section is transported to the discharging section by a spiral conveying component, and falls from the discharging section to the ground. The asphalt mixture is then initially flattened and compacted by the compacting section.
[0003] Since a heating part is provided in the asphalt storage part, the temperature of the asphalt mixture in the asphalt storage part can be ensured, but the subsequent transportation and discharging need to pass through the spiral conveying part and the discharging part in sequence. This does not cause any problems when the temperature is high in summer, but in the winter in the north, the outdoor temperature is low and can reach zero degrees or even lower. Therefore, when paving the asphalt mixture, the temperature difference of the asphalt mixture passing through the spiral conveying part is large, which may easily cause part of the asphalt mixture to begin to harden in the spiral conveying part. The prematurely hardened asphalt mixture is more difficult to compact in the later stage, which will result in a density difference with the asphalt mixture laid later, and ultimately cause the asphalt mixture laid on the road surface to be prone to cracking and other quality problems in the later stage. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a device for quickly preheating and paving asphalt for pavement and bridges, which can prevent the asphalt mixture from solidifying in the spiral conveying component, resulting in quality problems such as cracking of the asphalt mixture on the road surface in the later stage.
[0005] The present invention provides a device for rapid preheating and paving asphalt for road surfaces and bridges, comprising: a spiral conveying component, a discharge barrel, a compacting roller and a heating component arranged on a vehicle body, the heating component comprising: a primary heat exchanger arranged on the compacting roller and a heat exchange tube arranged on the spiral blades of the spiral conveying component and the discharge barrel, the outlet end of the primary heat exchanger is connected to the inlet end of the heat exchange tube through an output pipeline, the inlet end of the primary heat exchanger is connected to the outlet end of the heat exchange tube through an inlet pipeline, the outlet end of the primary heat exchanger is located at the upper part of the primary heat exchanger, and the inlet end of the primary heat exchanger is located at the lower part of the primary heat exchanger, the heat exchange medium in the primary heat exchanger evaporates upwards through heat exchange with the compacting roller and enters the heat exchange tube through the output pipeline to heat the spiral blades and the discharge barrel, and the cooled heat exchange medium undergoes a phase change and enters the primary heat exchanger along the inlet pipeline to repeat the above process.
[0006] Optionally, the output pipeline includes a vertical pipe section, an inclined section and a horizontal pipe section connected in sequence, the vertical pipe section is fixedly connected to the outlet end of the first-stage heat exchanger, the horizontal pipe section is fixedly connected to the inlet end of the heat exchange tube, and the end where the inclined section is connected to the vertical pipe section is higher than the end where the inclined section is connected to the horizontal pipe section.
[0007] Optionally, the inflow pipeline is inclined, and an end of the inflow pipeline connected to the heat exchange tube is higher than an end of the inflow pipeline connected to the primary heat exchanger.
[0008] Optionally, the first-stage heat exchanger is in an arc-shaped cover structure, the first-stage heat exchanger cover is arranged on the periphery of the compaction roller, the first-stage heat exchanger is fixed on the bracket of the compaction roller, and the opening of the first-stage heat exchanger faces downward.
[0009] Optionally, the central angle of the longitudinal section of the first-stage heat exchanger is not less than 180 degrees and not more than 300 degrees.
[0010] Optionally, the main shaft of the spiral conveying component includes a solid section and a hollow section arranged upper and lower, the gap between the solid section and the hollow section forms a charging channel, the hollow section has a circulation channel along its extension direction, the solid section and the hollow section are connected by a bearing, the inner ring of the bearing has a connecting channel that passes through its inner and outer side walls, the connecting channel is aligned with the charging channel, the outer ring of the bearing has an entry channel, the entry channel is connected to the connecting channel, the circulation channel is connected to the heat exchange tube, and the entry channel is connected to the output pipeline.
[0011] Optionally, a receiving channel is opened in the spiral blade, the receiving channel is consistent with the spiral direction of the spiral blade, and the heat exchange tube passes through the receiving channel and is fixed inside the receiving channel.
[0012] Optionally, a spiral heating channel is opened in the side wall of the discharge barrel, and the heat exchange tube passes through the accommodating channel and the heating channel in sequence. The outlet end of the heat exchange tube is located at the bottom of the discharge barrel, and the inflow pipeline is fixedly connected to the outlet end of the heat exchange tube.
[0013] Optionally, the paving device also includes a mixing barrel arranged on the vehicle body, the bottom of the mixing barrel is connected to the spiral conveying component, and the heating assembly also includes a secondary heat exchanger arranged on the mixing barrel, the outlet end of the secondary heat exchanger is connected to the output pipeline through the output branch pipe, and the inlet end of the secondary heat exchanger is connected to the inflow pipeline through the input branch pipe.
[0014] Optionally, the secondary heat exchanger is annular, the secondary heat exchanger is sleeved on the outer circumference of the mixing barrel, and the output branch pipe is tangent to the secondary heat exchanger.
[0015] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:
[0016] The embodiment of the present invention provides a device for quickly preheating and paving asphalt for road and bridges. By arranging a first-stage heat exchanger on the compacting roller and arranging the heat exchange pipe on the spiral blades and the discharge barrel of the spiral conveying component, the heat generated by the compacting roller during the preheating of the asphalt mixture and the compacting roller compacting the asphalt mixture can be fully utilized to heat the heat exchange medium in the first-stage heat exchanger and convert it into a gaseous state. The gaseous heat exchange medium enters the heat exchange pipe from the inlet end of the heat exchange pipe along the output pipeline. The heat exchange pipe preheats the spiral blades and the discharge barrel of the spiral conveying component to make them have A certain temperature is set, which reduces the temperature difference between the spiral blades and the discharge barrel and the asphalt storage part. There is no need to add an additional heating part, and the spiral blades and the discharge barrel can be preheated by using the waste heat of the device itself. In this way, even when the outdoor temperature in the north is low, there will not be a large temperature difference when the asphalt mixture enters the spiral blades and the discharge barrel of the spiral conveying component, avoiding the asphalt mixture from solidifying near the spiral blades and the outer wall of the discharge barrel, ensuring that the asphalt mixture can be smoothly laid on the ground, and avoiding the asphalt mixture laid on the road surface from cracking and other quality problems in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the structure of a device for rapidly preheating and paving asphalt for road surfaces and bridges provided by an embodiment of the present invention;
[0018] Figure 2 A schematic diagram of the structure of an output pipeline provided by an embodiment of the present invention;
[0019] Figure 3 for Figure 1 A schematic diagram of the enlarged local structure at point A in the middle;
[0020] Figure 4 A schematic diagram of a portion of the structure of a spiral conveying component provided in an embodiment of the present invention;
[0021] Figure 5 A schematic diagram of the structure of a discharge barrel provided in an embodiment of the present invention;
[0022] Figure 6 A top view of a secondary heat exchanger provided in an embodiment of the present invention.
[0023] Description of reference numerals:
[0024] 1. Compacting roller; 2. Primary heat exchanger; 3. Spiral blades; 4. Discharging barrel; 5. Heat exchange tube; 6. Output pipeline; 60. Vertical pipe section; 61. Inclined section; 62. Horizontal pipe section; 7. Inflow pipeline; 8. Bracket; 9. Main shaft; 90. Solid section; 91. Hollow section; 92. Charging channel; 93. Circulation channel; 10. Bearing; 100. Inner ring; 101. Connecting channel; 102. Outer ring; 103. Entry channel; 11. Accommodating channel; 12. Heating channel; 13. Mixing barrel; 14. Secondary heat exchanger; 15. Output branch pipe; 16. Input branch pipe. DETAILED DESCRIPTION
[0025] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.
[0026] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] Since a heating part is provided in the asphalt storage section, the temperature of the asphalt mixture in the asphalt storage section can be guaranteed. However, the subsequent transportation and discharging need to pass through the spiral conveying component and the discharging barrel in sequence. This does not cause any problem when the temperature is high in summer, but in the winter in the north, the outdoor temperature is low and sometimes can reach zero degrees. In this way, when paving the asphalt mixture, the temperature difference of the asphalt mixture passing through the spiral conveying component is large. The prematurely hardened asphalt mixture is difficult to compact in the later stage, which will result in a density difference with the asphalt mixture laid later, and ultimately lead to the asphalt mixture laid on the road surface. Quality problems such as cracking are prone to occur in the later stage. The compaction roller generates a large friction with the asphalt mixture in the process of initially flattening and compacting the asphalt mixture, thereby increasing the temperature of the compaction roller itself. However, the asphalt mixture also needs to use other cooling components to cool the asphalt mixture during the compaction process. In other words, the increase in the temperature of the compaction roller itself is not conducive to the solidification of the asphalt mixture.
[0028] To this end, an embodiment of the present invention provides a device for quickly preheating and paving asphalt for road surfaces and bridges, which can prevent the asphalt mixture from solidifying in the spiral conveying component, causing quality problems such as cracking of the asphalt mixture on the road surface in the later stage.
[0029] At least one embodiment of the present invention provides a device for rapid preheating and paving asphalt for road surfaces and bridges, comprising: a spiral conveying component, a discharge barrel, a compaction roller and a heating component arranged on a vehicle body, the heating component comprising: a primary heat exchanger arranged on the compaction roller and a heat exchange tube arranged on the spiral blades of the spiral conveying component and the discharge barrel, the outlet end of the primary heat exchanger is connected to the inlet end of the heat exchange tube via an output pipeline, the inlet end of the primary heat exchanger is connected to the outlet end of the heat exchange tube via an inlet pipeline, the outlet end of the primary heat exchanger is located at the upper part of the primary heat exchanger, and the inlet end of the primary heat exchanger is located at the lower part of the primary heat exchanger, the heat exchange medium in the primary heat exchanger evaporates upward through heat exchange with the compaction roller and enters the heat exchange tube through the output pipeline to heat the spiral blades and the discharge barrel, and the cooled heat exchange medium undergoes a phase change and enters the primary heat exchanger along the inlet pipeline to repeat the above process.
[0030] In the device for rapid preheating and paving asphalt for road surfaces and bridges provided by the above-mentioned embodiment of the present invention, by arranging a first-level heat exchanger on the compacting roller and arranging the heat exchange tube on the spiral blades and the discharge barrel of the spiral conveying component, the heat generated by the preheating of the residual asphalt mixture of the compacting roller and the heat generated during the compaction of the asphalt mixture by the compacting roller can be fully utilized to heat the heat exchange medium in the first-level heat exchanger and convert it into a gaseous state. The gaseous heat exchange medium enters the heat exchange tube from the inlet end of the heat exchange tube along the output pipeline. The heat exchange tube preheats the spiral blades and the discharge barrel of the spiral conveying component to have a certain temperature, thereby reducing the temperature difference between the spiral blades and the discharge barrel and the asphalt storage part.
[0031] The present invention is described below by several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.
[0032] refer to Figure 1 , Figure 1 A schematic diagram of a rapid preheating and paving device for asphalt used in road and bridge construction according to an embodiment of the present invention is shown in FIG. Figure 1As shown, an embodiment of the present invention provides a device for rapid preheating and paving asphalt for road surfaces and bridges, comprising: a spiral conveying component, a discharge barrel 4, a compacting roller 1 and a heating component arranged on a vehicle body, the heating component comprising: a primary heat exchanger 2 arranged on the compacting roller 1 and a spiral blade 3 of the spiral conveying component and a heat exchange tube 5 arranged on the discharge barrel 4. It should be understood that the primary heat exchanger 2 cannot directly contact the compacting roller 1, because the compacting roller 1 needs to roll the asphalt mixture. If the primary heat exchanger 2 is directly in contact with the compacting roller 1, on the one hand, it will affect the compacting of the asphalt mixture by the compacting roller 1, and on the other hand, it is easy to make the asphalt mixture stick to the primary heat exchanger 2, affecting the heat exchange effect. The outlet end of the primary heat exchanger 2 is connected to the inlet end of the heat exchange tube 5 through the output pipeline 6, and the inlet end of the primary heat exchanger 2 is connected to the outlet end of the heat exchange tube 5 through the inlet pipeline 7. The output pipeline 6 and the inlet pipeline 7 can also be made of ordinary heat exchange tube material or thermal insulation material. The outlet end of the heat exchanger 2 is located at the upper part of the first-stage heat exchanger 2. In this way, as the heat exchange medium inside the first-stage heat exchanger 2 absorbs the heat of the compaction roller 1, it can undergo a phase change to become a gaseous state, and the gas is lighter and will move upward. The outlet end of the first-stage heat exchanger 2 is located at the upper part of the first-stage heat exchanger 2, so that the gaseous heat exchange medium can enter the output pipeline 6 along the outlet end and then enter the heat exchange tube 5. The inlet end of the first-stage heat exchanger 2 is located at the lower part of the first-stage heat exchanger 2. In this way, when the heat exchange tube 5 preheats the spiral blades 3 and the discharge barrel 4, the heat exchange medium inside it undergoes a phase change to become a liquid state after heat exchange. The liquid heat exchange medium re-enters the first-stage heat exchanger 2 along the inlet pipeline 7. The heat exchange medium in the first-stage heat exchanger 2 evaporates upward through heat exchange with the compaction roller 1 and enters the heat exchange tube 5 through the output pipeline 6, thereby heating the spiral blades 3 and the discharge barrel 4. The cooled heat exchange medium undergoes a phase change and enters the first-stage heat exchanger 2 along the inlet pipeline 7 to repeat the above process.
[0033] The embodiment of the present invention provides a device for quickly preheating and paving asphalt for road and bridges. By arranging a first-stage heat exchanger on the compacting roller and arranging the heat exchange pipe on the spiral blades and the discharge barrel of the spiral conveying component, the heat generated by the compacting roller during the preheating of the asphalt mixture and the compacting roller compacting the asphalt mixture can be fully utilized to heat the heat exchange medium in the first-stage heat exchanger and convert it into a gaseous state. The gaseous heat exchange medium enters the heat exchange pipe from the inlet end of the heat exchange pipe along the output pipeline. The heat exchange pipe preheats the spiral blades and the discharge barrel of the spiral conveying component to make them have A certain temperature is set, which reduces the temperature difference between the spiral blades and the discharge barrel and the asphalt storage part. There is no need to add an additional heating part, and the spiral blades and the discharge barrel can be preheated by using the waste heat of the device itself. In this way, even when the outdoor temperature in the north is low, there will not be a large temperature difference when the asphalt mixture enters the spiral blades and the discharge barrel of the spiral conveying component, avoiding the asphalt mixture from solidifying near the spiral blades and the outer wall of the discharge barrel, ensuring that the asphalt mixture can be smoothly laid on the ground, and avoiding the asphalt mixture laid on the road surface from cracking and other quality problems in the later stage.
[0034] Considering that the heat exchange medium will generate energy loss in the process of entering the heat exchange tube 5 from the output pipeline 6, in order to reduce the energy loss as much as possible.
[0035] refer to Figure 2 , Figure 2 A schematic diagram of the structure of the output pipeline provided by the embodiment of the present invention is shown in FIG. Figure 2 As shown, an embodiment of the present invention provides an output pipeline 6 in a device for rapid preheating and paving asphalt for road surfaces and bridges, comprising a vertical pipe section 60, an inclined section 61 and a horizontal pipe section 62 connected in sequence, the vertical pipe section 60 is fixedly connected to the outlet end of the primary heat exchanger 2, the horizontal pipe section 62 is fixedly connected to the inlet end of the heat exchange tube 5, and the end of the inclined section 61 connected to the vertical pipe section 60 is higher than the end of the inclined section 61 connected to the horizontal pipe section 62.
[0036] In this way, the heat exchange medium that has changed into a gas state can rise straightly along the vertical pipe section 60 through the vertical pipe section 60. When it needs to enter the heat exchange tube 5, the inclined section 61 is inclined and the end connecting the inclined section 61 and the vertical pipe section 60 is set to be higher than the end connecting the inclined section 61 and the horizontal pipe section 62. In this way, the gaseous heat exchange medium can smoothly enter the horizontal pipe section 62 along the inclined section 61 and then enter the heat exchange tube 5. The inclined section 61 can minimize the kinetic energy of the gaseous heat exchange medium in the flow process, reduce heat loss, and ensure that the heat of the heat exchange medium entering the heat exchange tube 5 remains stable.
[0037] Reference again Figure 1 An embodiment of the present invention provides an inlet pipe 7 in a device for rapid preheating and paving asphalt for road and bridge use, which is inclined, and one end of the inlet pipe 7 connected to the heat exchange pipe 5 is higher than the end of the inlet pipe 7 connected to the primary heat exchanger 2.
[0038] Because the heat exchange medium in the heat exchange tube 5 undergoes a phase change and is converted into a liquid state after passing through the spiral blades 3 and the discharge barrel 4, the liquid heat exchange medium enters the heat exchanger 2 along the inclined inlet pipe 7 under the action of gravity. Since the end of the inlet pipe 7 connected to the heat exchange tube 5 is higher than the end of the inlet pipe 7 connected to the primary heat exchanger 2, the liquid heat exchange medium can flow along the inlet pipe 7 under the action of gravity without the aid of external power source, which can simplify the structure to the greatest extent and achieve lightweight.
[0039] In order to make the primary heat exchanger 2 absorb as much waste heat of the compacting roller 1 as possible.
[0040] In a device for rapid preheating and paving asphalt for pavement and bridges provided in an embodiment of the present invention, the first-stage heat exchanger 2 is in an arc-shaped cover structure, the first-stage heat exchanger 2 is covered on the periphery of the compaction roller 1, the first-stage heat exchanger 2 is fixed on the bracket 8 of the compaction roller 1, and the opening of the first-stage heat exchanger 2 faces downward. It should be noted that the first-stage heat exchanger 2 should be as close to the compaction roller 1 as possible, that is, the smaller the gap between the two, the better, but it should not affect the compaction roller 1 in rolling the asphalt mixture. The first-stage heat exchanger 2 is in an arc-shaped cover structure, so that it can absorb the heat of the compaction roller 1 over a larger area, thereby further ensuring that the heat exchange medium in the first-stage heat exchanger 2 undergoes a phase change after absorbing heat.
[0041] Specifically, the central angle of the longitudinal section of the primary heat exchanger 2 is not less than 180 degrees and not more than 300 degrees. It should be noted that not less than 180 degrees can ensure that the primary heat exchanger 2 can absorb the heat of the compaction roller 1 over a larger area as much as possible without affecting the compaction roller 1 in compacting the asphalt mixture.
[0042] Considering that the screw conveying component is generally a rotating component, the connection between the screw conveying component and the output pipeline 6 needs to take into account the influence of the rotation of the screw conveying component.
[0043] refer to Figure 3 , Figure 3 for Figure 1 The enlarged schematic diagram of the local structure at A in the middle is as follows: Figure 3As shown, an embodiment of the present invention provides a main shaft 9 of a spiral conveying component in a device for rapid preheating and paving asphalt for road surfaces and bridges, comprising a solid section 90 and a hollow section 91 arranged up and down, a gap between the solid section 90 and the hollow section 91 forming a charging channel 92, the hollow section 91 having a circulation channel 93 along its extension direction, the solid section 90 and the hollow section 91 being connected by a bearing 10, an inner ring 100 of the bearing 10 having a connecting channel 101 penetrating through its inner and outer side walls, the connecting channel 101 being aligned with the charging channel 92, an outer ring 102 of the bearing 10 having an entry channel 103, the entry channel 103 being connected to the connecting channel 101, the circulation channel 93 being connected to the heat exchange tube 5, and the entry channel 103 being connected to the output pipeline 6.
[0044] During actual processing, the connecting channel 101 can be a through hole opened only on the inner ring 100, or the middle part of the inner ring 100 can be cut to divide the inner ring 100 into two parts, the inner ring 100 and the solid section 90 and the hollow section 91 are fixed, and the outer ring 102 is fixedly connected to the output pipeline 6. In this way, when the spiral conveying component rotates, the output pipeline 6 does not need to rotate with it. The heat exchange medium enters the heat exchange tube 5 through the entrance channel 103, the connecting channel 101, the charging channel 92 and the circulation channel 93 along the output pipeline 6 to preheat the spiral blades 3 and the discharge barrel. In this way, after the heat exchange tube 5 preheats the spiral blades 3 and the discharge barrel 4, the heat exchange medium inside it undergoes a phase change to become liquid after heat exchange, and the liquid heat exchange medium re-enters the primary heat exchanger 2 along the inlet pipeline 7.
[0045] refer to Figure 4 , Figure 4 A schematic diagram of a portion of the structure of a spiral conveying component provided in an embodiment of the present invention, such as Figure 4 As shown, an embodiment of the present invention provides a device for rapid preheating and paving asphalt for road and bridge use, in which a receiving channel 11 is provided in a spiral blade 3, and the receiving channel 11 is consistent with the spiral direction of the spiral blade 3. The heat exchange tube 5 passes through the receiving channel 11 and is fixed inside the receiving channel 11.
[0046] On the one hand, the spiral heat exchange tube 5 can accelerate the flow of the heat exchange medium, speed up the heat cycle, further ensure the residual heat of the spiral blade 3 and the discharge barrel 4, and ensure the temperature of the spiral blade 3 and the discharge barrel 4. On the other hand, a receiving channel 11 is opened in the spiral blade 3, and the heat exchange tube 5 is passed through the receiving channel 11 and fixed inside the receiving channel 11, so that the spiral blade 3 can act as an insulation layer to avoid excessive heat loss to the outside. In this way, when the heat diffuses, it is directly dissipated through the spiral blade 3, so that the asphalt mixture in contact with the spiral blade 3 can be directly preheated, further avoiding heat loss, ensuring the temperature of the spiral blade 3 and the discharge barrel 4, and further avoiding the asphalt mixture from solidifying near the outer wall of the spiral blade 3 and the discharge barrel 4, ensuring that the asphalt mixture can be smoothly laid on the ground, and avoiding the asphalt mixture laid on the road surface from cracking and other quality problems in the later stage.
[0047] refer to Figure 5 , Figure 5 A schematic diagram of the structure of the discharge barrel provided in an embodiment of the present invention, as shown in FIG. Figure 5 As shown, an embodiment of the present invention provides a device for rapid preheating and paving asphalt for road surfaces and bridges, in which a spiral heating channel 12 is opened in the side wall of a discharge barrel 4, and a heat exchange tube 5 passes through the accommodating channel 11 and the heating channel 12 in sequence. The outlet end of the heat exchange tube 5 is located at the bottom of the discharge barrel 4, and the inflow pipeline 7 is fixedly connected to the outlet end of the heat exchange tube 5.
[0048] On the one hand, the spiral heat exchange tube 5 can accelerate the flow of the heat exchange medium, speed up the heat cycle, further ensure the residual heat of the spiral blades 3 and the discharge barrel 4, and ensure the temperature of the spiral blades 3 and the discharge barrel 4. On the other hand, a spiral heating channel 12 is opened in the side wall of the discharge barrel 4. Passing the heat exchange tube 5 through the heating channel 12 and fixing it inside the heating channel 12 can make the discharge barrel 4 act as an insulation layer to avoid excessive heat loss to the outside. In this way, when the heat diffuses, it is directly dissipated through the discharge barrel 4, so that the asphalt mixture in contact with the discharge barrel 4 can be directly preheated, further avoiding heat loss, ensuring the temperature of the spiral blades 3 and the discharge barrel 4, and further avoiding the asphalt mixture from solidifying near the spiral blades and the outer wall of the discharge barrel, ensuring that the asphalt mixture can be smoothly laid on the ground, and avoiding the asphalt mixture laid on the road surface from cracking and other quality problems in the later stage.
[0049] Reference again Figure 1It should be noted that the asphalt storage part in the existing paving device is provided with a mixing barrel 13, and a heating component is usually arranged in the mixing barrel 13 to ensure that the asphalt mixture is above 160°C to avoid solidification. The paving device also includes a mixing barrel 13 arranged on the vehicle body, and the bottom of the mixing barrel 13 is connected to a spiral conveying component. The heating component also includes a secondary heat exchanger 14 arranged on the mixing barrel 13, and the outlet end of the secondary heat exchanger 14 is connected to the output pipeline 6 through the output branch pipe 15, and the inlet end of the secondary heat exchanger 14 is connected to the inflow pipeline 7 through the input branch pipe 16.
[0050] The temperature of the mixing barrel 13 is relatively high in itself. By arranging a secondary heat exchanger 14 on the mixing barrel 13 and connecting the outlet end of the secondary heat exchanger 14 to the output pipeline 6 through the output branch pipe 15, the heat exchange medium in the heat exchange tube 5 can be heated in multiple stages, further ensuring that the heat exchange medium in the heat exchange tube 5 heats the spiral blade 3 and the discharge barrel 4, while accelerating the circulation of the heat exchange medium, ensuring that the preheating temperature of the spiral blade 3 and the discharge barrel is maintained, and further avoiding the asphalt mixture from solidifying near the outer wall of the spiral blade 3 and the discharge barrel 4, ensuring that the asphalt mixture can be smoothly laid on the ground, and avoiding the asphalt mixture laid on the road surface from cracking and other quality problems in the later stage.
[0051] refer to Figure 6 , Figure 6 A top view of a secondary heat exchanger provided in an embodiment of the present invention, such as Figure 6 As shown, the secondary heat exchanger 14 is annular, and is sleeved on the outer circumference of the mixing barrel 13 , and the output branch pipe 15 is tangent to the secondary heat exchanger 14 .
[0052] The annular secondary heat exchanger 14 can automatically complete the circulation of the entire heat exchange medium. First, the heat exchange medium that changes into a gas state after absorbing heat enters the output branch pipe 15 and then enters the heat exchange pipe 5 through the output pipeline 6, and preheats the spiral blade 3 and the discharge barrel 4 in turn. As the heat is dissipated, the heat exchange medium liquefies and enters the secondary heat exchanger 14 through the inlet pipeline 7 and the input branch pipe 16. After absorbing the heat of the mixing barrel 13 through the annular secondary heat exchanger 14, it is vaporized again and enters the circulation. The output branch pipe 15 is tangent to the secondary heat exchanger 14, which can make the heat exchange medium that changes into a gas state after absorbing heat flow directly to the output branch pipe 15 along the tangent direction, reducing the loss of energy of the heat exchange medium due to the pipeline phase change, further avoiding heat loss, ensuring the temperature of the spiral blade 3 and the discharge barrel 4, and further avoiding the solidification of the asphalt mixture near the outer wall of the spiral blade 3 and the discharge barrel 4, ensuring that the asphalt mixture can be smoothly laid on the ground, and avoiding the asphalt mixture laid on the road surface from cracking and other quality problems in the later stage.
[0053] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. A device for rapidly preheating and laying asphalt for road and bridge, characterized in that: The invention comprises a spiral conveying component, a discharge barrel (4), a compacting roller (1) and a heating component arranged on a vehicle body, wherein the heating component comprises: a primary heat exchanger (2) arranged on the compacting roller (1) and a heat exchange tube (5) arranged on a spiral blade (3) of the spiral conveying component and the discharge barrel (4), wherein the outlet end of the primary heat exchanger (2) is connected to the inlet end of the heat exchange tube (5) via an output pipe (6), the inlet end of the primary heat exchanger (2) is connected to the outlet end of the heat exchange tube (5) via an inlet pipe (7), the outlet end of the primary heat exchanger (2) is located at the upper part of the primary heat exchanger (2), and the inlet end of the primary heat exchanger (2) is located at the lower part of the primary heat exchanger (2); The heat exchange medium in the primary heat exchanger (2) evaporates upward through heat exchange with the compaction roller (1) and enters the heat exchange tube (5) through the output pipeline (6), thereby heating the spiral blades (3) and the discharge barrel (4). The cooled heat exchange medium undergoes a phase change and enters the primary heat exchanger (2) along the inlet pipeline (7) to repeat the above process.
2. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 1, characterized in that: The output pipeline (6) comprises a vertical pipe section (60), an inclined section (61) and a horizontal pipe section (62) which are connected in sequence; the vertical pipe section (60) is fixedly connected to the outlet end of the primary heat exchanger (2); the horizontal pipe section (62) is fixedly connected to the inlet end of the heat exchange tube (5); and the end of the inclined section (61) connected to the vertical pipe section (60) is higher than the end of the inclined section (61) connected to the horizontal pipe section (62).
3. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 1, characterized in that: The inflow pipeline (7) is inclined, and the end of the inflow pipeline (7) connected to the heat exchange tube (5) is higher than the end of the inflow pipeline (7) connected to the primary heat exchanger (2).
4. The device for rapid preheating and laying asphalt for road and bridge use according to claim 1, characterized in that: The primary heat exchanger (2) is an arc-shaped cover structure, the primary heat exchanger (2) is covered on the periphery of the compaction roller (1), the primary heat exchanger (2) is fixed on the bracket (8) of the compaction roller (1), and the opening of the primary heat exchanger (2) faces downward.
5. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 4, characterized in that: The central angle of the longitudinal section of the primary heat exchanger (2) is not less than 180 degrees and not more than 300 degrees.
6. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 1, characterized in that: The main shaft (9) of the spiral conveying component comprises a solid section (90) and a hollow section (91) arranged in an upper and lower manner; a gap between the solid section (90) and the hollow section (91) forms a charging channel (92); the hollow section (91) has a circulation channel (93) along its extension direction; the solid section (90) and the hollow section (91) are connected via a bearing (10); the inner ring (100) of the bearing (10) has a connecting channel (101) penetrating the inner and outer side walls thereof; the connecting channel (101) is aligned with the charging channel (92); the outer ring (102) of the bearing (10) has an inlet channel (103); the inlet channel (103) is in communication with the connecting channel (101); the circulation channel (93) is connected to a heat exchange tube (5); and the inlet channel (103) is connected to an output pipeline (6).
7. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 6, characterized in that: The spiral blade (3) is provided with a receiving channel (11), the receiving channel (11) having the same spiral direction as the spiral blade (3), and the heat exchange tube (5) passes through the receiving channel (11) and is fixed inside the receiving channel (11).
8. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 7, characterized in that: A spiral heating channel (12) is provided in the side wall of the discharge barrel (4), the heat exchange tube (5) passes through the accommodating channel (11) and the heating channel (12) in sequence, the outlet end of the heat exchange tube (5) is located at the bottom of the discharge barrel (4), and the inlet pipeline (7) is fixedly connected to the outlet end of the heat exchange tube (5).
9. The device for rapid preheating and laying asphalt for road and bridge as claimed in claim 1, characterized in that: The paving device further comprises a stirring barrel (13) arranged on the vehicle body, the bottom of the stirring barrel (13) being connected to the spiral conveying component, and the heating component further comprises a secondary heat exchanger (14) arranged on the stirring barrel (13), the outlet end of the secondary heat exchanger (14) being connected to the output pipeline (6) via an output branch pipe (15), and the inlet end of the secondary heat exchanger (14) being connected to the inlet pipeline (7) via an input branch pipe (16).
10. The device for rapid preheating and laying asphalt for road and bridge use according to claim 9, characterized in that: The secondary heat exchanger (14) is annular and is sleeved on the outer circumference of the stirring barrel (13). The output branch pipe (15) is tangent to the secondary heat exchanger (14).