An atomizing spray system for high viscosity modified bitumen

Abstract

The present application relates to the technical fields of asphalt atomization spraying and sprinkling, and discloses an atomization spraying and sprinkling system for high-viscosity modified asphalt, which comprises a spraying and sprinkling pipe, a feeding pipe, a second piston pipe, a first piston pipe, a third piston pipe, a spiral flow guide shearing assembly, a heating assembly, a multi-stage atomization assembly, a telescopic nozzle assembly, a piston transmission assembly and a gas path blockage clearing assembly; the atomization spraying and sprinkling system is rotated under the impact of asphalt by the arc-shaped lower pressing plate and the supporting ring plate in the spiral flow guide shearing assembly, spiral flow guide and preliminary shearing are formed on the asphalt, ceramic heating rings are used for continuous heat supply, the viscosity of the asphalt is reduced and the temperature drop in the nozzle area is reduced, the gradually shrinking atomization holes are used for extrusion shearing and multi-channel counter-attack crushing, the SBS polymer elastic network is destroyed, and the high-viscosity asphalt is atomized; the T-shaped nozzle and the inner nozzle are slidably scraped together, and residual asphalt on the inner wall of the nozzle is removed.

Description

Technical Field

[0001] This invention relates to the field of asphalt atomization spraying technology, specifically to an atomization spraying system for high-viscosity modified asphalt. Background Technology

[0002] High-viscosity modified asphalt is widely used in road engineering maintenance, building waterproofing construction, and other fields. Spraying is a core process to ensure construction quality. Existing asphalt atomizing spraying equipment mostly adopts a pressure atomization structure, which is mainly suitable for continuous spraying of conventional viscosity asphalt. For high-viscosity materials such as SBS modified asphalt, the industry mainly improves the spraying effect by increasing the conveying pressure and adding a preheating stage. The structural optimization of related spraying equipment is mostly focused on the adjustment of nozzle orifice diameter and matching of feed pressure parameters.

[0003] During the spraying of high-viscosity asphalt, the temperature in the nozzle area decreases gradually. The nozzle area is in direct contact with the outside environment, resulting in a rapid cooling rate that makes it difficult to maintain the high temperature required for spraying. After spraying, the asphalt residue inside the spraying chamber will adhere to the inside of the spray gun due to cooling, causing high starting resistance during the next spraying, or even nozzle blockage leading to spray gun failure. The elastic network structure formed by polymers such as SBS makes asphalt atomization more likely to form filaments rather than droplets, which cannot be fully broken down by conventional shear structures, resulting in poor atomization effect.

[0004] Existing technologies cannot simultaneously address the three requirements of multi-stage shear atomization of high-viscosity asphalt, nozzle area heat replenishment and insulation, and chamber self-cleaning after shutdown; a single pressure atomization structure cannot adapt to the crushing requirements of asphalt with a high-elasticity network structure; without a matching airflow linkage cleaning structure, it is impossible to clean the residual material in the flow channel after shutdown, resulting in poor stability of continuous operation of the equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an atomized spraying system for high-viscosity modified asphalt. By combining spiral flow shearing, nozzle area heating, multi-stage counter-flushing atomization, and linked air circuit unblocking, the system achieves the technical effects of stable atomization of high-viscosity asphalt, reduced stringing, lower clogging risk, and continuous and reliable spraying.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides an atomized spraying system for high-viscosity modified asphalt, comprising a spraying pipe, a feed pipe, a second piston pipe, a first piston pipe, a third piston pipe, a spiral guide shearing assembly, a heating assembly, a multi-stage atomization assembly, a telescopic nozzle assembly, a piston transmission assembly, and an air passage unblocking assembly.

[0008] The feed pipe is connected to the first piston pipe;

[0009] The second piston tube is coaxially disposed above the first piston tube, and both the second piston tube and the first piston tube are disposed on the upper part of the spray pipe;

[0010] The spiral flow guiding shearing assembly includes a support ring plate and an arc-shaped lower pressure plate. The support ring plate is rotatably disposed inside the spray pipe and located below the first piston pipe. The arc-shaped lower pressure plate is disposed along the circumference of the support ring plate.

[0011] The heating component is a ceramic heating ring, which is located below the spiral flow guiding shearing component.

[0012] The multi-stage atomizing component includes an atomizing plate, an impact cone tube, and a partition plate, wherein the atomizing plate, the impact cone tube, and the partition plate are arranged below the ceramic heating ring along the asphalt flow direction;

[0013] The telescopic nozzle assembly includes a protective cover, a T-shaped nozzle, an inner nozzle, and a limiting spring. The inner nozzle is fixed to the bottom of the impact cone tube, and the T-shaped nozzle is slidably sleeved on the outside of the inner nozzle.

[0014] The piston transmission assembly includes a first piston plate, a first piston rod, a second piston plate, a second piston rod, a third piston plate, a support ring, a return spring, and an elastic collar. The first piston plate is disposed inside the second piston tube, the second piston plate is disposed inside the first piston tube, and the third piston plate is disposed inside the third piston tube. The first piston plate, the second piston plate, and the third piston plate are linked together through the first piston rod and the second piston rod.

[0015] The second piston plate is provided with a flow guide groove; the air passage unblocking component includes an air supply pipe, an air supply hole, an air guide hole and an air outlet hole. The air supply pipe connects the second piston pipe and the air supply hole. The air guide hole and the air outlet hole connect the third piston pipe and the protective cover. The asphalt flow channel formed by the partition plate is connected to the telescopic nozzle assembly.

[0016] Preferably, the support ring plate is rotatably sleeved outside the first piston tube, the arc-shaped lower pressure plate is a guide plate that is bent circumferentially and inclined along the direction of asphalt flow, and multiple arc-shaped lower pressure plates are evenly distributed circumferentially on the inner wall of the support ring plate. The outlet of the guide groove faces the arc-shaped lower pressure plate so that the asphalt impacts the arc-shaped lower pressure plate and drives the support ring plate to rotate.

[0017] Preferably, a sliding ring is provided on the outer side of the support ring plate, and a limiting groove is provided on the inner wall of the spray pipe. The sliding ring is embedded in the limiting groove and can rotate circumferentially along the limiting groove to limit the axial position of the support ring plate.

[0018] Preferably, the ceramic heating ring is fixed to the inner wall of the spray pipe and located between the support ring plate and the atomizing plate, which is used to reheat the flowing asphalt and reduce the temperature drop in the nozzle area.

[0019] Preferably, the atomizing plate is provided with atomizing holes that taper in the direction of asphalt flow, and the impact cone tube is divided into multiple sets of asphalt flow channels by multiple sets of partition plates at equal intervals along the circumference. Multiple sets of oblique extrusion holes are formed at the bottom of the multiple sets of partition plates, and the outlet of the extrusion holes faces the central axis of the impact cone tube.

[0020] Preferably, the inner nozzle is fixed at the center of the bottom of the impact cone tube, the T-shaped nozzle is slidably sleeved on the outside of the inner nozzle, and the inner wall of the T-shaped nozzle and the outer wall of the inner nozzle form a sliding scraping fit, and the limiting spring is evenly distributed circumferentially between the bottom of the impact cone tube and the top of the T-shaped nozzle.

[0021] Preferably, the top end of the first piston rod is fixedly connected to the first piston plate, and the bottom end extends into the first piston tube and is fixedly connected to the second piston plate. The top end of the second piston rod is fixedly connected to the second piston plate, and the bottom end is fixedly connected to the third piston plate. The support ring is fixed to the center of the top of the atomizing plate and sleeved on the outside of the third piston tube. The two ends of the return spring abut against the second piston plate and the support ring respectively. The elastic collar is sleeved on the outside of the return spring, and the upper end of the elastic collar is sealed to the second piston plate and the lower end is sealed to the support ring.

[0022] Preferably, the guide groove is radially formed at the edge of the second piston plate, the inlet of the guide groove is connected to the inner cavity of the first piston tube, and the outlet faces the arc-shaped lower pressure plate.

[0023] Preferably, the air supply port is connected to the second piston tube through an air supply pipe, and the air outlet direction of the air supply port is towards the arc-shaped lower pressure plate; the air guide port and the air outlet port are connected in sequence to the third piston tube and the inner cavity of the protective cover, and are used to supply air to the inner cavity of the protective cover to drive the T-shaped nozzle to extend.

[0024] Preferably, the top of the second piston tube is provided with a one-way air intake valve for supplementing the second piston tube with external airflow when the first piston plate moves downward; the bottom of the spray pipe is provided with a tapered tube, and the bottom of the outer side of the tapered tube is sealed and fastened to the protective cover.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0026] 1. This invention utilizes the rotation of the arc-shaped lower pressure plate and support ring plate in the spiral flow guiding and shearing assembly under the impact of asphalt to form a spiral flow guiding and preliminary shearing of the asphalt. Combined with the continuous heat replenishment by the ceramic heating ring, it reduces the risk of viscosity rebound caused by temperature drop in high-viscosity asphalt and improves the problem of easy atomization and stringing.

[0027] 2. The present invention uses an atomizing plate, an impact cone tube and a partition plate to form a multi-stage atomization structure. Through the extrusion and shearing of the gradually narrowing atomization holes and the multi-channel impact crushing, the SBS polymer elastic network is further destroyed, promoting the formation of atomized droplets of high-viscosity asphalt. The T-shaped nozzle and the inner nozzle form a sliding scraping cooperation, which can remove residual asphalt on the inner wall of the nozzle.

[0028] 3. This invention links the piston transmission assembly with the air circuit unblocking assembly. When the machine stops, the air supply pipe, air supply hole, air guide hole and air outlet form a purging airflow. Combined with the sealing and isolation structure of the elastic collar, it reduces the adhesion and blockage of asphalt cooling and improves the stability of continuous operation of the equipment.

[0029] 4. This invention utilizes a piston transmission assembly and an air path unblocking assembly to form a shutdown purging process, and in conjunction with the sliding scraping of the T-shaped nozzle and the inner nozzle, it achieves the removal of residual asphalt. This reduces the need for external water supply for rinsing and cleaning after the equipment is shut down, and reduces the consumption of cleaning water such as circulating water and reclaimed water. While ensuring the cleaning effect of the flow channel, it also has a certain water-saving effect, which is conducive to saving water resources in the cleaning process. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0032] Figure 3 This is a cross-sectional view of the structure at the spray pipe in this invention;

[0033] Figure 4 This is a schematic diagram of the gas pipeline structure in this invention;

[0034] Figure 5 This is a cross-sectional view of the structure at the second piston tube in this invention;

[0035] Figure 6 This is a schematic diagram of the internal component installation structure of the spray pipe in this invention;

[0036] Figure 7 This is a schematic diagram showing the structural distribution of the first piston tube, the second piston tube, and the impact cone tube in this invention;

[0037] Figure 8 This is a cross-sectional view of the installation structure at the first piston tube, the second piston tube, and the support ring plate in this invention.

[0038] Figure 9 This is a bottom view of the structure at the supporting ring plate in this invention;

[0039] Figure 10 This is a cross-sectional view of the component structure at the support ring in this invention;

[0040] Figure 11 This is a schematic diagram showing the positions of the first piston plate, the second piston plate, and the third piston plate in this invention.

[0041] Figure 12 This is a cross-sectional view of the structure at the impact cone tube in this invention;

[0042] Figure 13 This is a bottom view of the structure at the impact cone tube in this invention;

[0043] Figure 14 This is a cross-sectional view of the T-shaped nozzle and the inner nozzle in this invention.

[0044] Figure 15 This is a cross-sectional view showing the positions and structures of the support ring plate, ceramic heating ring, and atomizing plate in this invention.

[0045] Figure label:

[0046] 10. Spraying pipe; 11. Conical pipe; 12. Protective cover; 13. Feed pipe; 14. Air supply pipe; 15. One-way air inlet valve; 16. Second piston pipe; 17. First piston pipe; 18. Support ring plate; 19. Ceramic heating ring;

[0047] 20. Atomizing plate; 21. Impact cone tube; 22. Limiting groove; 23. First piston plate; 24. Elastic collar; 25. Partition plate; 26. T-shaped nozzle; 27. First piston rod; 28. Second piston plate; 29. ​​Air delivery port;

[0048] 30. Return spring; 31. Third piston tube; 32. Support ring; 33. Air outlet; 34. Inner nozzle; 35. Limiting spring; 36. Air guide hole; 37. Sliding ring; 38. Second piston rod; 39. Arc-shaped lower pressure plate;

[0049] 40. Guide channel; 41. Extrusion hole; 42. Third piston plate; 43. Atomizing hole. Detailed Implementation

[0050] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof.

[0051] Example 1

[0052] like Figures 1 to 15 As shown, this embodiment provides an atomized spraying system for high-viscosity modified asphalt, including a spraying pipe 10, a feed pipe 13, a second piston pipe 16, a first piston pipe 17, a third piston pipe 31, a spiral guide shearing assembly, a heating assembly, a multi-stage atomization assembly, a telescopic nozzle assembly, a piston transmission assembly, and an air passage unblocking assembly.

[0053] The feed pipe 13 is connected to the first piston pipe 17;

[0054] The second piston tube 16 is coaxially disposed above the first piston tube 17, and both the second piston tube 16 and the first piston tube 17 are disposed on the upper part of the spray pipe 10.

[0055] The spiral guide shear assembly includes a support ring plate 18 and an arc-shaped lower pressure plate 39. The support ring plate 18 is rotatably disposed inside the spray pipe 10 and located below the first piston pipe 17. The support ring plate 18 is rotatably sleeved on the outside of the first piston pipe 17. The arc-shaped lower pressure plate 39 is a guide plate that is bent circumferentially and inclined along the direction of asphalt flow. Multiple arc-shaped lower pressure plates 39 are evenly distributed circumferentially on the inner wall of the support ring plate 18. A sliding ring 37 is provided on the outer side of the support ring plate 18. A limiting groove 22 is provided on the inner wall of the spray pipe 10. The sliding ring 37 is embedded in the limiting groove 22 and can rotate circumferentially along the limiting groove 22 to limit the axial position of the support ring plate 18.

[0056] The heating component is a ceramic heating ring 19, which is located below the spiral flow guiding shearing component. The ceramic heating ring 19 is fixed to the inner wall of the spray pipe 10 and is located between the support ring plate 18 and the atomizing plate 20. It is used to reheat the flowing asphalt and reduce the temperature drop in the nozzle area.

[0057] The multi-stage atomization assembly includes an atomizing plate 20, an impact cone tube 21, and a partition plate 25, which are sequentially arranged below the ceramic heating ring 19. The atomizing plate 20 is provided with atomizing holes 43 that are gradually narrowed along the direction of asphalt flow. The impact cone tube 21 is divided into multiple asphalt flow channels by multiple partition plates 25 at equal intervals along the circumference. Multiple sets of oblique extrusion holes 41 are formed at the bottom of the multiple partition plates 25. The outlet of the extrusion holes 41 faces the central axis of the impact cone tube 21, which is used to make multiple streams of asphalt form impact crushing atomization.

[0058] The telescopic nozzle assembly includes a protective cover 12, a T-shaped nozzle 26, an inner nozzle 34, and a limiting spring 35. It is located at the bottom of the impact cone tube 21. The inner nozzle 34 is fixed at the center of the bottom of the impact cone tube 21. The T-shaped nozzle 26 is slidably sleeved on the outside of the inner nozzle 34, and the inner wall of the T-shaped nozzle 26 and the outer wall of the inner nozzle 34 form a sliding scraping engagement. The limiting spring 35 is evenly distributed circumferentially between the bottom of the impact cone tube 21 and the top of the T-shaped nozzle 26 to support the T-shaped nozzle 26.

[0059] The piston transmission assembly includes a first piston plate 23, a first piston rod 27, a second piston plate 28, a second piston rod 38, a third piston plate 42, a support ring 32, a return spring 30, and an elastic collar 24. The first piston plate 23 is disposed inside the second piston tube 16, the second piston plate 28 is disposed inside the first piston tube 17, and the third piston plate 42 is disposed inside the third piston tube 31.

[0060] The top end of the first piston rod 27 is fixedly connected to the first piston plate 23, and the bottom end extends into the first piston tube 17 and is fixedly connected to the second piston plate 28; the top end of the second piston rod 38 is fixedly connected to the second piston plate 28, and the bottom end is fixedly connected to the third piston plate 42; the support ring 32 is fixed to the top center of the atomizing plate 20 and is sleeved on the outside of the third piston tube 31; the two ends of the return spring 30 abut against the second piston plate 28 and the support ring 32 respectively; the elastic collar 24 is sleeved on the outside of the return spring 30, and the upper end of the elastic collar 24 is sealed to the second piston plate 28 and the lower end is sealed to the support ring 32, which is used to isolate the asphalt flow channel from the return spring 30 and the third piston tube 31;

[0061] The second piston plate 28 is provided with a guide groove 40, which is radially opened on the edge of the second piston plate 28. The inlet of the guide groove 40 is connected to the inner cavity of the first piston tube 17, and the outlet faces the arc-shaped lower pressure plate 39.

[0062] The air passage unblocking assembly includes an air supply pipe 14, an air supply port 29, an air guide port 36, and an air outlet port 33. The air supply port 29 is connected to the second piston pipe 16 through the air supply pipe 14, and the air outlet direction of the air supply port 29 is towards the arc-shaped lower pressure plate 39. The air guide port 36 and the air outlet port 33 are connected in sequence to the third piston pipe 31 and the inner cavity of the protective cover 12, and are used to supply air to the inner cavity of the protective cover 12 to drive the T-shaped nozzle 26 to extend. The top of the second piston pipe 16 is provided with a one-way air inlet valve 15, which is used to supplement the second piston pipe 16 with external airflow when the first piston plate 23 moves downward. The bottom of the spray pipe 10 is provided with a tapered pipe 11, and the bottom of the outer side of the tapered pipe 11 is sealed and fastened to the protective cover 12.

[0063] The atomized spraying system proposed in this embodiment is used as follows: When the system is working, high viscosity modified asphalt is continuously fed into the upper cavity area inside the first piston tube 17 through the feed pipe 13. The input pressure of the asphalt acts on the top surface of the second piston plate 28, pushing the second piston plate 28 to move axially downward along the inner wall of the first piston tube 17.

[0064] When the second piston plate 28 moves downward, it simultaneously drives the first piston rod 27, the first piston plate 23, the second piston rod 38, and the third piston plate 42 to move downward together.

[0065] The first piston plate 23 moves downward inside the second piston tube 16, creating a negative pressure in the upper chamber of the second piston tube 16. The one-way air intake valve 15 opens, and outside air is drawn into the second piston tube 16 to complete the air replenishment.

[0066] Asphalt passes through the radially opened guide groove 40 on the second piston plate 28, and is sprayed laterally along the outlet of the guide groove 40 and impacts the arc-shaped lower pressure plate 39 on the inner side of the support ring plate 18.

[0067] The arc-shaped lower pressure plate 39 is an arc-shaped downward guiding structure, which converts the radial impact force of the asphalt into a circumferential rotational torque, driving the support ring plate 18 to rotate;

[0068] The sliding ring 37 on the outer side of the support ring plate 18 rotates circumferentially along the limiting groove 22 on the inner wall of the spray pipe 10, limiting axial movement and ensuring smooth rotation.

[0069] Under the action of rotation, the asphalt forms a spiral downward flow state, generating initial shear force, which destroys the elastic network formed by SBS, reduces the viscosity of the asphalt, and completes the first stage of spiral shear.

[0070] After being guided by the spiral, the asphalt enters the heating chamber where the ceramic heating ring 19 is located. The ceramic heating ring 19 continuously heats the asphalt, offsetting the temperature gradient drop caused by heat exchange between the nozzle area and the outside world, reducing the risk of viscosity rebound due to cooling of the asphalt, and keeping the asphalt at a suitable temperature for atomization.

[0071] The heated asphalt flows downward into the atomizing plate 20. The atomizing plate 20 has atomizing holes 43 that are gradually narrowed along the direction of asphalt flow. Under pressure, the asphalt passes through the gradually narrowing atomizing holes 43 and is squeezed and sheared, achieving secondary shear atomization, which initially breaks the asphalt into fine streams.

[0072] After secondary atomization, the asphalt enters the interior of the impact cone tube 21. Multiple sets of partition plates 25 divide the impact cone tube 21 into multiple asphalt flow channels along the circumference. The bottom of the flow channel is an inclined extrusion hole 41. The outlet of the extrusion hole 41 is facing the central axis of the impact cone tube 21. Multiple streams of asphalt are ejected at high speed from different directions and collide with each other at the center position to achieve three-stage impact crushing atomization, further destroying the elastic network, so that the asphalt forms atomized droplets and reduces stringing.

[0073] After being atomized in three stages, the asphalt enters the interior of the protective cover 12. At the same time, the third piston plate 42 descends and compresses the gas in the third piston tube 31. The high-pressure gas enters the inner cavity of the protective cover 12 through the air guide hole 36 and the air outlet 33, and acts on the pressure surface of the T-shaped nozzle 26, pushing the T-shaped nozzle 26 to overcome the elastic force of the limit spring 35 and extend downward below the inner nozzle 34. The atomized asphalt is sprayed out from the T-shaped nozzle 26, completing the spraying operation.

[0074] When feeding stops, the asphalt pressure disappears, and the return spring 30 pushes the second piston plate 28 to return to its original position, causing the first piston plate 23 and the third piston plate 42 to move upwards simultaneously. The first piston plate 23 compresses the air in the second piston tube 16, and the high-pressure gas is ejected towards the arc-shaped lower pressure plate 39 through the air supply pipe 14 and the air supply hole 29. On the one hand, it drives the support ring plate 18 to continue rotating, using centrifugal force to throw off the residual asphalt. On the other hand, it blows the airflow across the top surface of the support ring plate 18, the ceramic heating ring 19, and the atomizing plate 20.

[0075] The blowing airflow flows downward through the atomizing hole 43, impacts the cone tube 21 and the asphalt flow channel formed by the partition plate 25, pushing the residual asphalt in the flow channel towards the inner nozzle 34; at the same time, the third piston plate 42 moves upward to reduce the air pressure in the protective cover 12, and the limit spring 35 pulls the T-shaped nozzle 26 upward to retract, and the outer wall of the inner nozzle 34 scrapes against the inner wall of the T-shaped nozzle 26, scraping off the attached residual asphalt, and the residual asphalt is discharged with the help of the airflow.

[0076] The elastic collar 24 moves up and down synchronously with the second piston plate 28. The upper end of the elastic collar 24 is sealed to the second piston plate 28 and the lower end is sealed to the support ring 32 to isolate the asphalt flow channel from the reset spring 30 and the third piston tube 31, preventing asphalt leakage into the air circuit and causing blockage, thus clearing the blockage in the flow channel during shutdown and ensuring smooth start-up next time.

[0077] The tapered tube 11 at the bottom of the spray pipe 10 is sealed to the protective cover 12, which narrows the atomization range and improves the uniformity of spraying.

[0078] It should be noted that the inner nozzle 34 can be a cylindrical, conical, or fan-shaped structure depending on the actual construction requirements. The internal shape of the T-type nozzle 26 is adapted to the external shape of the inner nozzle 34. The surface of the parts in contact with asphalt can be coated with polytetrafluoroethylene to reduce asphalt residue on the wall.

[0079] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An atomizing spraying system for high-viscosity modified asphalt, comprising a spraying pipe (10), a feed pipe (13), a second piston pipe (16), a first piston pipe (17), a third piston pipe (31), a spiral guide shearing assembly, a heating assembly, a multi-stage atomizing assembly, a telescopic nozzle assembly, a piston transmission assembly, and an air passage unblocking assembly, characterized in that: The feed pipe (13) is connected to the first piston pipe (17), and the second piston pipe (16) is coaxially arranged above the first piston pipe (17). The second piston pipe (16) and the first piston pipe (17) are both arranged on the upper part of the spray pipe (10). The spiral guide shearing assembly includes a support ring plate (18) and an arc-shaped lower pressure plate (39). The support ring plate (18) is rotatably disposed inside the spray pipe (10) and located below the first piston pipe (17). The arc-shaped lower pressure plate (39) is disposed along the circumference of the support ring plate (18). The heating component is a ceramic heating ring (19), which is located below the spiral flow guiding shearing component; The multi-stage atomizing component includes an atomizing plate (20), an impact cone tube (21), and a partition plate (25). The atomizing plate (20), the impact cone tube (21), and the partition plate (25) are arranged below the ceramic heating ring (19) along the asphalt flow direction. The telescopic nozzle assembly includes a protective cover (12), a T-shaped nozzle (26), an inner nozzle (34), and a limiting spring (35). The inner nozzle (34) is fixed to the bottom of the impact cone tube (21), and the T-shaped nozzle (26) is slidably sleeved on the outside of the inner nozzle (34). The piston transmission assembly includes a first piston plate (23), a first piston rod (27), a second piston plate (28), a second piston rod (38), a third piston plate (42), a support ring (32), a return spring (30), and an elastic collar (24). The first piston plate (23) is disposed inside the second piston tube (16), the second piston plate (28) is disposed inside the first piston tube (17), and the third piston plate (42) is disposed inside the third piston tube (31). The first piston plate (23), the second piston plate (28), and the third piston plate (42) are linked together through the first piston rod (27) and the second piston rod (38). The second piston plate (28) is provided with a guide groove (40); The air passage unblocking assembly includes an air supply pipe (14), an air supply hole (29), an air guide hole (36), and an air outlet hole (33). The air supply pipe (14) connects the second piston pipe (16) and the air supply hole (29). The air guide hole (36) and the air outlet hole (33) connect the third piston pipe (31) and the protective cover (12). The asphalt flow channel formed by the partition plate (25) is connected to the telescopic nozzle assembly.

2. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The support ring plate (18) is rotatably sleeved on the outside of the first piston tube (17). The arc-shaped lower pressure plate (39) is a guide plate that is bent in the circumferential direction and inclined in the direction of asphalt flow. Multiple arc-shaped lower pressure plates (39) are evenly distributed in the circumferential direction on the inner wall of the support ring plate (18). The outlet of the guide groove (40) faces the arc-shaped lower pressure plate (39) so that the asphalt impacts the arc-shaped lower pressure plate (39) and drives the support ring plate (18) to rotate.

3. The atomized spraying system for high-viscosity modified asphalt according to claim 2, characterized in that, The outer side of the support ring plate (18) is provided with a sliding ring (37), and the inner wall of the spray pipe (10) is provided with a limiting groove (22). The sliding ring (37) is embedded in the limiting groove (22) and can rotate circumferentially along the limiting groove (22) to limit the axial position of the support ring plate (18).

4. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The ceramic heating ring (19) is fixed on the inner wall of the spray pipe (10) and located between the support ring plate (18) and the atomizing plate (20) to reheat the flowing asphalt and reduce the temperature drop in the nozzle area.

5. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The atomizing plate (20) is provided with atomizing holes (43) that are gradually narrowed along the asphalt flow direction. The impact cone (21) is divided into multiple asphalt flow channels by multiple sets of partition plates (25) at equal intervals along the circumference. Multiple sets of oblique extrusion holes (41) are formed at the bottom of the multiple sets of partition plates (25). The outlet of the extrusion hole (41) faces the central axis of the impact cone (21).

6. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The inner nozzle (34) is fixed at the center of the bottom of the impact cone tube (21). The T-shaped nozzle (26) is slidably sleeved on the outside of the inner nozzle (34), and the inner wall of the T-shaped nozzle (26) and the outer wall of the inner nozzle (34) form a sliding scraping fit. The limiting spring (35) is evenly distributed circumferentially between the bottom of the impact cone tube (21) and the top of the T-shaped nozzle (26).

7. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The top end of the first piston rod (27) is fixedly connected to the first piston plate (23), and the bottom end extends into the first piston tube (17) and is fixedly connected to the second piston plate (28). The top end of the second piston rod (38) is fixedly connected to the second piston plate (28), and the bottom end is fixedly connected to the third piston plate (42). The support ring (32) is fixed to the top center of the atomizing plate (20) and sleeved on the outside of the third piston tube (31). The two ends of the reset spring (30) abut against the second piston plate (28) and the support ring (32) respectively. The elastic collar (24) is sleeved on the outside of the reset spring (30), and the upper end of the elastic collar (24) is sealed to the second piston plate (28), and the lower end is sealed to the support ring (32).

8. The atomized spraying system for high-viscosity modified asphalt according to claim 7, characterized in that, The guide groove (40) is radially opened at the edge of the second piston plate (28). The inlet of the guide groove (40) is connected to the inner cavity of the first piston tube (17), and the outlet faces the arc-shaped lower pressure plate (39).

9. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The air supply hole (29) is connected to the second piston tube (16) through the air supply pipe (14), and the air outlet direction of the air supply hole (29) is towards the arc-shaped lower pressure plate (39); the air guide hole (36) and the air outlet hole (33) are connected in sequence to the third piston tube (31) and the inner cavity of the protective cover (12) to supply air to the inner cavity of the protective cover (12) to drive the T-shaped nozzle (26) to extend.

10. The atomized spraying system for high-viscosity modified asphalt according to claim 1, characterized in that, The second piston tube (16) is provided with a one-way air intake valve (15) at the top, which is used to supplement the external airflow to the second piston tube (16) when the first piston plate (23) moves downward; the bottom of the spray pipe (10) is provided with a tapered pipe (11), and the bottom of the outer side of the tapered pipe (11) is sealed and fastened to the protective cover (12).

Images