Asphalt outlet protection device for asphalt treatment process

Abstract

The asphalt discharge port protection device comprises a sealing cover arranged on a discharge pipe at the bottom of an asphalt buffer tank, the bottom of the sealing cover is open and extends into an asphalt cooling pond, the top of the sealing cover is connected with an exhaust pipe, and the outer end of the exhaust pipe is connected with an external condenser; a partition plate is arranged on the outer wall of the asphalt discharging pipe in an up-down sliding mode and divides the sealing cavity into a negative pressure cavity and a steam cavity, air ports are formed in the partition plate along the circumferential side, an air cylinder is arranged on the sealing cover, sealing plates used for sealing the air ports are arranged on the partition plate, the asphalt discharging pipe is sleeved with an upper lantern ring, and each set of sealing plates are fixedly connected with the upper lantern ring through connecting rods. A rotation driving structure is arranged between the upper lantern ring and the asphalt discharge pipe, the partition plate moves upwards to drive the sealing plate to seal the air port through the rotation driving structure, and the partition plate moves downwards to drive the sealing plate to open the air port through the driving structure. The asphalt can be prevented from splashing into the sealing cover to cause blockage, and the airflow in the sealing cover is kept stable.

Description

Technical Field

[0001] This invention relates to the field of asphalt extraction technology, specifically to a protective device for asphalt discharge outlets in an asphalt processing technology. Background Technology

[0002] Currently, the extraction process of asphaltene from coal ash generally involves mixing coal ash with wash oil, then sequentially centrifuging and extracting, followed by heating and evaporation to obtain liquid asphalt, which is then collected. Before asphalt collection, it is discharged into an asphalt cooling tank for cooling to prevent excessively high temperatures in the collection area and environmental pollution caused by small particulate dust. The existing tanks, pumps, and pipelines used in the asphalt extraction process are fixed on an erected iron frame, while the asphalt cooling tank is located below the iron frame. The liquid asphalt extracted by the asphalt extraction process is discharged from the asphalt buffer tank at the end of the process into the asphalt cooling tank, and then the cooled asphalt in the asphalt cooling tank is conveyed to the collection area by a chain scraper conveyor.

[0003] Because the tank is sealed and at high temperature during the asphalt processing process, when the liquid asphalt is discharged to the asphalt cooling pool for cooling, the liquid asphalt will generate a large amount of steam when it is cooled by water. Some of the steam will enter the buffer tank from the liquid asphalt discharge outlet, causing an "explosion" phenomenon, which will cause the equipment and the iron frame to vibrate. Therefore, this application provides a protective device for the asphalt discharge outlet of the asphalt processing process to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a protective device for asphalt discharge outlets in asphalt treatment processes to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an asphalt discharge outlet protection device for an asphalt treatment process, comprising an asphalt cooling pool, an iron frame, and an asphalt buffer tank mounted on the iron frame. The asphalt buffer tank is provided with an asphalt discharge pipe facing the asphalt cooling pool. The asphalt discharge pipe is provided with a sealing cover. The bottom of the sealing cover is open and extends into the asphalt cooling pool. The top of the sealing cover is connected to an exhaust pipe, one end of which extends into the inside of the sealing cover and the other end is connected to an external condenser. The bottom opening of the sealing cover forms a closed cavity through a water seal. A partition is slidably installed on the outer wall of the asphalt discharge pipe, dividing the sealed cavity into a negative pressure cavity and a steam cavity. Multiple air vents are provided along the periphery of the partition for steam from the steam cavity to enter the negative pressure cavity. The sealing cover is equipped with a cylinder that drives the partition to slide up and down. The partition is equipped with sealing plates for blocking the air vents, with multiple sets of sealing plates corresponding to the air vents. An upper collar is fitted on the asphalt discharge pipe. Each set of sealing plates is fixedly connected to the upper collar through a connecting rod. The upper collar is rotatably mounted on the partition. A drive mechanism is provided between the upper collar and the asphalt discharge pipe. When the partition moves up, the drive mechanism drives the sealing plates to block the air vents. When the partition moves down, the drive mechanism drives the sealing plates to open the air vents.

[0006] Preferably, the driving structure includes a first guide shaft fixed to the outer wall of the asphalt discharge pipe and a driving groove. The driving groove is disposed on the upper collar and includes an upper vertical groove, a lower vertical groove and an inclined guide groove connecting the upper vertical groove and the lower vertical groove. The first guide shaft is initially located in the upper vertical groove.

[0007] Preferably, a buffer plate is also slidably installed inside the negative pressure chamber, which divides the negative pressure chamber into a buffer chamber and a gas guiding chamber. The cylinder output end extends into the sealing ring cavity and is fixedly connected to the top of the partition. A stop ring is fixed on the outer wall of the cylinder output end inside the gas guiding chamber. A spring is provided between the top of the stop ring and the buffer plate. The buffer plate is provided with a pipe hole for the suction pipe to extend into the gas guiding chamber.

[0008] Preferably, each set of connecting rods has an arc-shaped step block at the bottom, and the top of the partition has an arc-shaped step groove for the arc-shaped step block to slide axially.

[0009] Preferably, an annular tube is provided inside the sealing cover below the partition, and a fixing rod is fixed between the annular tube and the inner wall of the sealing cover. An annular water tank is fixed on the outer wall of the sealing cover, and a water inlet channel is connected between the water tank and the annular tube. Multiple sets of nozzle assemblies are provided around the annular tube, and the water outlet of the nozzle assembly is inclined towards the inner wall of the sealing cover.

[0010] Preferably, the inner wall of the sealing cover is fixed with an annular water groove below the nozzle assembly, and an inner annular water curtain groove is provided between the annular water groove and the inner wall of the sealing cover. A fixed short rod is connected between the inner wall of the sealing cover and the annular water groove.

[0011] Preferably, the sealing cover is provided with scraper rods below the annular water tank. The scraper rods are attached to the inner wall of the sealing cover and are provided in multiple sets along the circumference. A lower sleeve ring is rotatably sleeved on the outer wall of the asphalt discharge pipe. A torsion spring is connected between the lower sleeve ring and the asphalt discharge pipe. A fixed long rod is connected between each set of scraper rods and the lower sleeve ring. A driving component for driving the lower sleeve ring to rotate is provided at the bottom of the partition.

[0012] Preferably, the driving component includes a first extension rod fixed to the bottom of the partition and a first short shaft disposed on the bottom side wall of the first extension rod. The lower sleeve is provided with a vertical guide groove for the first short shaft to slide into. The lower sleeve is also provided with an upper inclined groove and a lower inclined groove that connect with the vertical guide groove. The length of the lower inclined groove is twice the length of the lower inclined groove.

[0013] Preferably, the top of the scraper is provided with an arc-shaped water receiving plate, and a gap is formed between the arc-shaped water receiving plate and the inner wall of the sealing cover. The top of the arc-shaped water receiving plate is provided with a water receiving groove, and a water groove is provided inside the scraper. The top of the water groove is connected to the water receiving groove. Multiple sets of water outlet grooves are provided on the outer wall of the scraper along the height direction. The interior of the water outlet groove is connected to the water groove. An outer ring water curtain groove is provided on the inner wall of the top of the annular water groove. A fixing short rod fixes the annular water groove as a whole. The bottom opening of the outer ring water curtain groove faces the inner wall of the sealing cover.

[0014] Preferably, the nozzle assembly includes an arc-shaped nozzle, a first water pipe, a second water pipe, a flexible hose, and a pressure regulating pipe. The first water pipe and the second water pipe are connected by a flexible hose. One end of the pressure regulating pipe is threaded to the first water pipe, and the other end is threaded to the second water pipe. The outer wall of the flexible hose is provided with an annular protrusion. The inner wall of the pressure regulating pipe is provided with a pressure ring. The outer wall of the pressure regulating pipe is provided with an outer abutment ring. The outer abutment ring is provided with a slanted abutment groove. The bottom of the partition is provided with a second extension rod. The bottom of the second extension rod is provided with a second short shaft for abutting against the slanted abutment groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a sealed cover, with the bottom of the cover sealed by water from an asphalt cooling pool, to limit the diffusion of vapor generated by liquid asphalt upon contact with water to the external environment. The air inside the sealed cover can be drawn to an external condenser for cooling through an exhaust pipe and an external fan, and the cooled substance (such as wash oil) can be recovered. By setting up a sliding partition to divide the sealed cavity into a negative pressure cavity and a steam cavity, the flow rate of steam inside the sealed cover toward the exhaust pipe can be accelerated when using a low-power fan to extract the steam inside. Multiple sets of scrapers are installed on the inner wall of the sealing cover, and the scrapers swing back and forth in conjunction with the movement of the partition. This ensures the stability of the water curtain formed by the spray nozzle assembly on the inner wall of the sealing cover, and also prevents the long-term adhesion of asphalt to the inner wall of the sealing cover from causing blockage. By setting an arc-shaped water receiving plate at the top of the scraper, with a gap between the arc-shaped water receiving plate and the inner wall of the sealing cover, and the nozzle assembly including an arc-shaped nozzle, a first water pipe, a second water pipe, a hose, and a pressure regulating pipe, the water spray pressure of the nozzle can be reduced before the scraper swings. The thickness of the water curtain inside the sealing cover is increased by the outer ring water curtain groove, allowing some water to enter the arc-shaped water receiving plate. The water curtain is formed on the outer wall of the scraper through the water trough and the water outlet trough, preventing asphalt from adhering to the scraper. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the asphalt buffer tank, sealing cover and asphalt cooling pool of the present invention; Figure 2 This is a cross-sectional view of the interior of the sealing cover of the present invention; Figure 3 This is an exploded view of the present invention highlighting the upper collar and the partition plate; Figure 4 This is a schematic diagram highlighting the structure of the lower collar and scraper rod of the present invention; Figure 5 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 6 yes Figure 2 Enlarged schematic diagram of part B; Figure 7 yes Figure 2 An enlarged schematic diagram of section C; Figure 8 This is an illustrative diagram highlighting the internal structure of the hose, annular protrusion, and pressure regulating pipe of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Asphalt cooling pool; 2. Iron frame; 3. Asphalt buffer tank; 4. Asphalt discharge pipe; 5. Sealing cover; 6. Air extraction pipe; 7. Chain scraper conveyor; 8. Sealed cavity; 9. Partition plate; 10. Negative pressure cavity; 101. Buffer cavity; 102. Air guide cavity; 11. Steam cavity; 12. Air inlet; 13. Cylinder; 14. Sealing plate; 15. Upper collar; 16. Connecting rod; 17. Drive mechanism; 18. First guide shaft; 19. Drive groove; 191. Upper vertical groove; 192. Lower vertical groove; 193. Inclined guide groove; 23. Buffer plate; 24. Arc-shaped stepped groove; 25. Reinforcing rod; 26. Abutment ring; 27. Spring; 28. Pipe hole; 29. ​​Annular pipe; 30. Fixing rod; 31. Annular water tank; 32. Water inlet channel; 33. Nozzle assembly; 331. First water pipe; 332. Second water pipe; 333. Arc-shaped 334. Nozzle; 335. Hose; 336. Pressure regulating pipe; 37. Annular water trough; 38. Inner ring water curtain trough; 39. Fixed short rod; 40. Scraper rod; 41. Lower collar; 42. Torsion spring; 43. Fixed long rod; 44. Drive component; 45. First extension rod; 46. First short shaft; 47. Nozzle fixing rod; 48. Arc-shaped step block; 49. Vertical guide groove; 50. Upper inclined groove; 51. Lower inclined groove; 52. Arc-shaped water receiving plate; 53. Gap; 54. Water receiving trough; 55. Water outlet trough; 56. Outer ring water curtain trough; 57. Annular protrusion; 58. Pressure ring; 59. Inclined abutment groove; 50. Second extension rod; 51. Second short shaft; 52. Outer abutment ring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-8 The present invention provides a technical solution: See Figure 1 , 2An asphalt discharge outlet protection device for an asphalt treatment process includes an asphalt cooling pool 1, an iron frame 2, and an asphalt buffer tank 3 installed on the iron frame 2. The asphalt cooling pool 1 is equipped with a chain scraper conveyor 7. The asphalt buffer tank 3 is equipped with an asphalt discharge pipe 4 facing the asphalt cooling pool 1. The asphalt discharge pipe 4 is equipped with a sealing cover 5. The bottom of the sealing cover 5 is open and extends into the asphalt cooling pool 1. The top of the sealing cover 5 is connected to an exhaust pipe 6. One end of the exhaust pipe 6 extends into the interior of the sealing cover 5, and the other end is connected to an external condenser. An external fan will draw away the steam inside the sealing cover 5 through the exhaust pipe 6 and send it to the condenser for multiple condensations. The wash oil contained in the condensed liquid can be recycled. It should be noted that the power of the fan should not be too high to avoid large fluctuations in the water used to seal the sealing cover 5 and to reduce the range of splashing when the liquid asphalt is cooled by water. See Figure 1 , 2 To prevent steam accumulation due to slow steam flow inside the sealing cover 5 caused by excessively high fan power, the bottom opening of the sealing cover 5 is sealed by a water seal. A partition 9 slides vertically on the outer wall of the asphalt discharge pipe 4, dividing the sealing cavity 8 into a negative pressure chamber 10 and a steam chamber 11. Multiple air vents 12 are provided along the periphery of the partition 9 to allow steam from the steam chamber 11 to enter the negative pressure chamber 10. A cylinder 13 drives the partition 9 to slide vertically. The cylinders 13 can be symmetrically arranged on both sides of the sealing cover 5 to maintain stability when driving the partition 9 to move up and down. Sealing plates 14 are provided on the partition 9 to seal the air vents 12. Multiple sealing plates 14 are provided corresponding to the air vents 12. An upper collar 15 is fitted onto the asphalt discharge pipe 4. Each sealing plate 14 is fixedly connected to the upper collar 15 via a connecting rod 16. The upper collar 15 is rotatably mounted on the partition 9. A drive structure 17 is provided between the asphalt discharge pipes 4. When the partition 9 moves upward, the drive structure 17 drives the sealing plate 14 to block the air port 12. When the partition 9 moves downward, the drive structure drives the sealing plate 14 to open the air port 12. After the gas in the steam chamber 11 enters the negative pressure chamber 10 through the air port 12, the cylinder 13 drives the partition 9 to move upward, compressing the space inside the negative pressure chamber 10. This can accelerate the gas to gather towards the exhaust pipe 6. By setting the partition 9 to separate the steam chamber 11 to the lower position, the exhaust power of the fan can also be appropriately increased. The sealing plate 14 that blocks the air port 12 can seal the negative pressure chamber 10 when the steam in the negative pressure chamber 10 reaches the exhaust pipe 6 position. When the partition 9 moves downward, the sealing plate 14 can open the air port 12. The increased space in the negative pressure chamber 10 accelerates the steam in the steam chamber 11 to enter the negative pressure chamber 10 through the air port 12, preventing the steam density in the steam chamber 11 from being too high and flowing into the asphalt discharge outlet.

[0021] See Figure 2 , 3The sealing plate 14 opens or seals the air vent 12 by moving the partition 9 up and down. The driving structure 17 includes a first guide shaft 18 fixed to the outer wall of the asphalt discharge pipe 4 and a driving groove 19. The driving groove 19 is set on the upper collar 15 and includes an upper vertical groove 191, a lower vertical groove 192, and an inclined guide groove 193 connecting the upper vertical groove 191 and the lower vertical groove 192. The first guide shaft 18 is initially located in the upper vertical groove 191, which can restrict the rotation of the upper collar 15. When the partition 9 moves upward, the first guide shaft 18 enters the inclined guide groove 193 from the upper vertical groove 191, thereby driving the upper collar 15 to rotate, so that each set of sealing plates 14 rotates with the upper collar 15 through the connecting rod 16 to the position of the air port 12 for sealing; in addition, each set of connecting rods 16 has an arc-shaped step block 43 at the bottom, and the partition 9 has an arc-shaped step groove 24 at the top for the arc-shaped step block 43 to slide axially, so that the collar can rotate on the upper partition 9 and can also move axially along the asphalt discharge pipe 4.

[0022] See Figure 2 , 3 To prevent the steam in the negative pressure chamber 10 from rushing into the steam chamber 11 due to the reduction in space of the negative pressure chamber 10 during the rotation of the sealing plate 14 to the position directly above the sealing port 12, a buffer plate 23 is also slidably installed inside the negative pressure chamber 10. The buffer plate 23 divides the negative pressure chamber 10 into a buffer chamber 101 and a guide chamber 102. The output end of the cylinder 13 extends into the sealing chamber 8 and is fixedly connected to the top of the partition plate 9. A stop ring 2 is fixed on the outer wall of the output end of the cylinder 13 inside the guide chamber 102. 6. A spring 27 is provided between the top of the abutment ring 26 and the buffer plate 23. When the cylinder 13 starts to drive the partition 9 to move upward, the buffer plate 23 will move upward to keep the space of the negative pressure chamber 10 unchanged. When the sealing plate 14 moves directly above the air port 12, the buffer plate 23 is in contact with the top of the sealing cover 5. The partition 9 continues to move upward to compress the negative pressure chamber 10. The buffer plate 23 is provided with a pipe hole 28 for the suction pipe 6 to extend into the air guide chamber 102. The suction pipe 6 is always located in the negative pressure chamber 10 through the pipe hole 28.

[0023] See Figure 1 , 2 An annular pipe 29 is located below the partition 9 inside the sealing cover 5. A fixing rod 30 is fixed between the annular pipe 29 and the inner wall of the sealing cover 5. An annular water tank 31 is fixed on the outer wall of the sealing cover 5. Multiple reinforcing rods 25 are connected between the annular water tank 31 and the iron frame 2 to increase the connection strength between the sealing cover 5 and the iron frame 2. A water inlet channel 32 is connected between the water tank and the annular pipe 29. Multiple sets of nozzle assemblies 33 are provided around the annular pipe 29. The water outlet of the nozzle assembly 33 is inclined towards the inner wall of the sealing cover 5. By setting the nozzle assembly 33, a water curtain can be formed on the inner wall of the sealing cover 5, which greatly reduces the probability that some liquid asphalt will stick to the inner wall of the sealing cover 5 after splashing with water.

[0024] See Figure 2 , 6 To ensure that the water curtain formed by the nozzle assembly 33 spraying water onto the sealing cover 5 has a uniform thickness and stable flow, an annular water groove 34 is fixed to the inner wall of the sealing cover 5 below the nozzle assembly 33. An inner annular water curtain groove 35 is provided between the annular water groove 34 and the inner wall of the sealing cover 5. A fixed short rod 36 is connected between the inner wall of the sealing cover 5 and the annular water groove 34. The short rod can fix the annular water groove 34 to prevent the annular water groove 34 from being suspended. After the nozzle assembly 33 sprays water onto the inner wall of the sealing cover 5, it flows down through the inner annular water curtain groove 35, so that a water curtain of uniform thickness is formed on the inner wall of the sealing cover 5. It can also prevent the water flow from being too thick, which would cause the liquid asphalt to impact and cause the steam flow inside the sealing cover 5 to become chaotic.

[0025] See Figure 2 , 4 5. The sealing cover 5 is located below the annular water tank 34 and is equipped with scraper rods 37. Multiple sets of scraper rods 37 are evenly arranged along the circumference and fit against the inner wall of the sealing cover 5. A lower collar 38 is rotatably fitted on the outer wall of the asphalt discharge pipe 4. A torsion spring 39 connects the lower collar 38 to the asphalt discharge pipe 4. A fixed long rod 40 connects each set of scraper rods 37 to the lower collar 38. A driving component 41 is provided at the bottom of the partition 9 to drive the lower collar 38 to reciprocate. The driving component 41 drives the lower collar 38 to reciprocate at a certain angle, allowing multiple sets of scraper rods to scrape a certain arc range of the inner wall of the sealing cover 5. The multiple sets of scraper rods 37 avoid the need for a single set of scraper rods 37 to rotate one full turn to clean the inner wall of the sealing cover 5. The driving component 41... Component 41 includes a first extension rod 411 fixed to the bottom of the partition 9 and a first short shaft 412 disposed on the bottom side wall of the first extension rod 411. The lower sleeve 38 is provided with a vertical guide groove 44 for the first short shaft 412 to slide into. The lower sleeve 38 is also provided with an upper inclined groove 45 and a lower inclined groove 46 that connect with the vertical guide groove 44. The torsion spring 39 can make the opening of the vertical guide groove 44 on the lower sleeve 38 face the first short shaft 412 in the initial state, ensuring that the short shaft can enter the vertical guide groove 44 when the partition 9 moves down. The length of the lower inclined groove 46 is twice the length of the upper inclined groove 46, so that after the first short shaft 412 passes through the upper inclined groove 45 and the lower inclined groove 46, the area on both sides of the inner wall of the cleaning rod 37 is symmetrical.

[0026] See Figure 2 , 45, 6. To prevent liquid asphalt from sticking to the scraper 37 when cleaning the inner wall of the sealing cover 5, the top of the scraper 37 is provided with an arc-shaped water receiving plate 47. A gap 48 is formed between the arc-shaped water receiving plate 47 and the inner wall of the sealing cover 5. The water sprayed from the nozzle assembly 33 passes through the gap 48 through the thin water curtain formed by the inner ring water curtain groove 35 without impacting the arc-shaped water receiving plate 47 and affecting the stable flow of the water curtain. The top of the arc-shaped water receiving plate 47 is provided with a water receiving groove 49. A water groove 50 is provided inside the scraper 37. The top of the water groove 50 is connected to the water receiving groove 49. Multiple sets of water outlet grooves 51 are provided on the outer wall of the scraper 37 along the height direction. The interior of the water outlet groove 51 is connected to the water groove 50. An outer ring water curtain groove 52 is provided on the inner wall of the top of the annular water groove 34. The diameter of the outer ring water curtain groove is smaller than that of the inner ring water curtain groove 35. The fixing short rod 36 fixes the annular water groove 34 as a whole. The bottom opening of the curtain groove 52 faces the inner wall of the sealing cover 5. By increasing the water outlet of the nozzle assembly 33, the water pressure can be reduced, and the flow rate of water through the inner ring water curtain groove 35 will be reduced. The water sprayed from the nozzle assembly 33 will pass through both the outer ring water curtain groove 52 and the inner ring water curtain groove 35 at the same time, so that the inner wall of the sealing cover 5 forms a thicker water curtain. At this time, the thickness of the water curtain will be greater than the gap 48 between the arc-shaped water receiving plate 47 and the inner wall of the sealing cover 5, so that the water receiving groove 49 of the arc-shaped water receiving plate 47 can be connected to water. At this time, the flow rate of the water curtain is reduced, avoiding a large impact with the arc-shaped water receiving plate 47. After the water receiving groove 49 is connected to water, the water will flow through the water groove 50 and the water outlet groove 51 in the scraper 37 and pass through the outer wall of the scraper 37, so that the outer wall of the scraper 37 also forms a water curtain, making it less likely for the liquid asphalt that may adhere to the inner wall of the sealing cover 5 to stick to the scraper 37.

[0027] See Figure 2 , 78. The method for adjusting the water spray pressure of the spray assembly is as follows: The nozzle assembly 33 includes an arc-shaped nozzle 333, a first water pipe 331, a second water pipe 332, a hose 334, and a pressure regulating pipe 335. The first water pipe 331 and the second water pipe 332 are connected through the hose 334. One end of the pressure regulating pipe 335 is threaded to the first water pipe 331, and the other end is threaded to the second water pipe 332. The arc-shaped nozzle 333 is fixed on the annular water groove 34 by the nozzle fixing rod 42. An annular protrusion 53 is provided on the outer wall of the hose 334. A pressure ring 54 is provided on the inner wall of the pressure regulating pipe 335. An outer abutment ring 58 is provided on the outer wall of the pressure regulating pipe 335. An inclined abutment groove 55 is provided on the outer abutment ring 58. A second extension rod 56 is provided at the bottom of the partition plate 9. A second short shaft 57 is provided at the bottom of the second extension rod 56 for abutting against the inclined abutment groove 55. In the initial stage of scraping the inner wall of the sealing cover 5 without driving the scraper rod 37. In the initial state, the pressure ring 54 is located at the position of the annular protrusion 53, reducing the diameter of the hose 334. Under the same pressure applied by the external water pump, the water pressure sprayed by the arc nozzle 333 is greater, causing all the water to flow down the inner wall of the sealing cover 5 through the inner annular water curtain groove to form a thin water curtain. When the drive scraper 37 rotates to clean the inner wall of the sealing cover 5, the second short shaft 57 will abut against the inclined groove 55 and drive the pressure regulating pipe 335 to rotate. The pressure regulating pipe 335 moves axially through the threaded connection with the first water pipe 331 and the second water pipe 332, thereby causing the pressure ring 54 to release the pressure on the annular protrusion 53, thereby increasing the inner diameter of the hose 334. Under the same pressure applied by the external water pump, the water pressure sprayed by the arc nozzle 333 is smaller, and the sprayed water will pass through the inner annular water curtain groove and the outer annular water curtain groove at the same time to form a thick water curtain, so that the arc-shaped water receiving plate 47 can collect the water.

[0028] Please see Figure 1-8As shown, during the operation of this device, the liquid asphalt extracted by the asphaltene extraction process will generate steam as it is discharged from the buffer tank into the asphalt cooling pool 1. An external fan will extract the steam from the sealing cover 5 through the exhaust pipe. During the process of the fan extracting the steam from the sealing cover 5, the cylinder 13 will start at regular intervals and drive the partition 9 to move up and down through the output end. When the partition 9 is driven to move up, the buffer plate 23 will move up a distance synchronously with the partition 9. At this time, the upper collar 15 will move up with the partition 9, and the first guide shaft 18 will enter the inclined guide groove 193 from the vertical groove, thereby driving the upper collar 15 to rotate. The rotation of the upper collar 15 will drive all the sealing plates 14 to rotate until the air port 12 is blocked. The cylinder 13 continues to drive the partition 9 to move up. At this time, the buffer plate 23 is located at the top of the sealing cavity 8 and cannot move up. The upward movement of the partition 9 will reduce the space of the sealing cavity 8, thereby guiding the gas to the position of the exhaust pipe 6 and accelerating the flow rate of the gas towards the position of the exhaust pipe 6. After the sealing ring completes one compression, the cylinder 13 drives the partition 9 to move down. Under the action of the abutment ring 26 and the spring 27, the buffer plate 23 will temporarily stay in the current position. After the upper collar 15 moves down relative to the first guide shaft 18, it will drive the upper collar 15 to reverse so that the sealing plate 14 opens the air port 12. At this time, the space of the sealing ring will increase and form a negative pressure, which will draw in the steam accumulated below the partition 9 and immediately reduce the density of the steam below the partition 9.

[0029] In addition, during the process of liquid asphalt being discharged from the buffer tank into the asphalt cooling pool 1, an external water pump will be started to continuously pump water into the annular water tank 31. The water in the annular water tank 31 will enter the annular pipe 29 through the water inlet channel 32 and be driven by the nozzle assembly 33 to spray the water onto the inner wall of the sealing cover 5. After passing through the inner ring water curtain groove 35, the water will flow down along the inner wall of the sealing cover 5 to form a water curtain, reducing the splashing of liquid asphalt and its adhesion to the inner wall of the sealing cover 5.

[0030] During the process of the cylinder 13 driving the partition 9 to move downward, the second extension rod 56 will follow the partition 9 to move downward and drive the pressure regulating pipe 335 to rotate by abutting the inclined groove 55 on the pressure regulating pipe 335 through the second short shaft 57. The rotation of the pressure regulating pipe 335 causes axial movement through the movement of the first water pipe 331 and the second water pipe 332, so that the pressure ring 54 is released from the squeezing of the annular protrusion 53 on the hose 334, increasing the inner diameter of the hose 334 and reducing the spray pressure of the arc-shaped nozzle. The arc of the water flowing to the annular water groove 34 will be reduced. At this time, the water passes through the inner ring water curtain groove 35 and the outer ring water curtain groove 52 at the same time. The inner ring water curtain groove 35 and the outer ring water curtain groove 52 spray water onto the inner wall of the sealing cover 5 to form a thick water curtain. Some of the thick water curtain will flow into the arc-shaped water receiving plate 47 and form a water curtain on the outer wall of the scraper 37 through the water groove 50 and the water outlet groove 51, so asphalt is avoided from adhering to the scraper 37.

[0031] In addition, during the downward movement of the partition 9, the first extension rod 411 will follow the partition 9 downward and drive the lower collar 38 to rotate once in both directions by abutting against the upper inclined groove 45 and the lower inclined groove 46 through the first short shaft 412. The angle of the reverse rotation is twice the angle of the forward rotation, so that a set of scraper rods 37 is responsible for scraping the asphalt on the symmetrical areas on both sides.

[0032] After the partition 9 moves upward, the pressure regulating pipe 335 and the lower collar 38 will return to their initial positions according to the above method. The pressure ring 54 inside the pressure regulating pipe 335 will press against the annular protrusion 53 again, thereby reducing the diameter of the hose 334, thereby increasing the water pressure of the arc nozzle and increasing the flow velocity of the water through the inner ring water curtain groove 35, so that a high-velocity thin water curtain is formed on the inner wall of the sealing cover 5, which can not only increase the effect of preventing asphalt from sticking to the wall, but also avoid the situation where a slow-flowing thick water curtain reduces the effect of preventing asphalt from sticking to the wall and makes it easy to splash water.

[0033] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention 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 invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for asphalt discharge outlet in an asphalt treatment process, comprising an asphalt cooling pool (1), an iron frame (2), and an asphalt buffer tank (3) mounted on the iron frame (2), characterized in that: The asphalt buffer tank (3) is provided with an asphalt discharge pipe (4) facing the asphalt cooling pool (1). The asphalt discharge pipe (4) is provided with a sealing cover (5). The bottom of the sealing cover (5) is open and extends into the asphalt cooling pool (1). The top of the sealing cover (5) is connected to an exhaust pipe (6). One end of the exhaust pipe (6) extends into the inside of the sealing cover (5) and the other end is connected to an external condenser. The bottom opening of the sealing cover (5) forms a closed cavity through a water seal. A partition (9) is provided on the outer wall of the asphalt discharge pipe (4) and slides up and down. The partition (9) divides the sealing cavity (8) into a negative pressure cavity (10) and a steam cavity (11). Multiple air ports (12) are provided on the partition (9) along its periphery for steam from the steam cavity (11) to enter the negative pressure cavity (10). A cylinder (13) is provided on the sealing cover (5) to drive the partition (9) to slide up and down. A sealing plate (14) is provided on the partition (9) to block the air ports (12). (14) Multiple sets are provided for the corresponding air inlet (12). An upper sleeve (15) is provided on the asphalt discharge pipe (4). Each set of sealing plates (14) is fixedly connected to the upper sleeve (15) through a connecting rod (16). The upper sleeve (15) is rotatably set on the partition (9). A drive structure (17) is provided between the upper sleeve (15) and the asphalt discharge pipe (4). The partition (9) moves upward and drives the sealing plate (14) to block the air inlet (12) through the drive structure (17). The partition (9) moves downward and drives the sealing plate (14) to open the air inlet (12) through the drive structure.

2. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 1, characterized in that: The drive structure (17) includes a first guide shaft (18) fixed on the outer wall of the asphalt discharge pipe (4) and a drive groove (19). The drive groove (19) is set on the upper collar (15). The drive groove (19) includes an upper vertical groove (191), a lower vertical groove (192) and an inclined guide groove (193) connecting the upper vertical groove (191) and the lower vertical groove (192). The first guide shaft (18) is initially located in the upper vertical groove (191).

3. A protective device for asphalt discharge outlet in an asphalt treatment process according to claim 1 or 2, characterized in that: The negative pressure chamber (10) is also equipped with a buffer plate (23) that slides up and down. The buffer plate (23) divides the negative pressure chamber (10) into a buffer chamber (101) and a gas guiding chamber (102). The output end of the cylinder (13) extends into the sealing ring cavity and is fixedly connected to the top of the partition plate (9). The output end of the cylinder (13) is fixed with a stop ring (26) on the outer wall of the gas guiding chamber (102). A spring (27) is provided between the top of the stop ring (26) and the buffer plate (23). The buffer plate (23) is provided with a pipe hole (28) for the suction pipe (6) to extend into the gas guiding chamber (102).

4. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 1, characterized in that: Each set of connecting rods (16) has an arc-shaped step block (43) at the bottom, and the top of the partition (9) has an arc-shaped step groove (24) for the arc-shaped step block (43) to slide along the axial direction.

5. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 1, characterized in that: An annular tube (29) is provided inside the sealing cover (5) below the partition (9). A fixing rod (30) is fixed between the annular tube (29) and the inner wall of the sealing cover (5). An annular water tank (31) is fixed on the outer wall of the sealing cover (5). A water inlet channel (32) is connected between the water tank and the annular tube (29). Multiple sets of nozzle assemblies (33) are provided around the annular tube (29). The water outlet of the nozzle assembly (33) is inclined toward the inner wall of the sealing cover (5).

6. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 5, characterized in that: The inner wall of the sealing cover (5) is fixed with an annular water groove (34) below the nozzle assembly (33). An inner annular water curtain groove (35) is provided between the annular water groove (34) and the inner wall of the sealing cover (5). A fixed short rod (36) is connected between the inner wall of the sealing cover (5) and the annular water groove (34).

7. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 6, characterized in that: The sealing cover (5) is located below the annular water tank (34) and is provided with scraper (37). The scraper (37) fits against the inner wall of the sealing cover (5) and is provided in multiple sets along the circumference. The outer wall of the asphalt discharge pipe (4) is rotatably fitted with a lower sleeve (38). A torsion spring (39) is connected between the lower sleeve (38) and the asphalt discharge pipe (4). A fixed long rod (40) is connected between each set of scraper (37) and the lower sleeve (38). The bottom of the partition (9) is provided with a driving component (41) to drive the lower sleeve (38) to rotate.

8. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 7, characterized in that: The driving component (41) includes a first extension rod (411) fixed to the bottom of the partition (9) and a first short shaft (412) disposed on the bottom side wall of the first extension rod (411). The lower collar (38) is provided with a vertical guide groove (44) into which the first short shaft (412) slides. The lower collar (38) is also provided with an upper inclined groove (45) and a lower inclined groove (46) that connect with the vertical guide groove (44). The length of the lower inclined groove (46) is twice the length of the lower inclined groove (46).

9. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 7, characterized in that: The top of the scraper (37) is provided with an arc-shaped water receiving plate (47), and a gap (48) is formed between the arc-shaped water receiving plate (47) and the inner wall of the sealing cover (5). The top of the arc-shaped water receiving plate (47) is provided with a water receiving groove (49). The scraper (37) is provided with a water trough (50), and the top of the water trough (50) is connected to the water receiving groove (49). The outer wall of the scraper (37) is provided with multiple sets of water outlet grooves (51) along the height direction. The inside of the water outlet groove (51) is connected to the water trough (50). The inner wall of the top of the annular water trough (34) is provided with an outer ring water curtain groove (52). The fixed short rod (36) fixes the annular water trough (34) as a whole. The bottom opening of the outer ring water curtain groove (52) faces the inner wall of the sealing cover (5).

10. The asphalt discharge outlet protection device for an asphalt treatment process according to claim 9, characterized in that: The nozzle assembly (33) includes an arc-shaped nozzle (333), a first water pipe (331), a second water pipe (332), a hose (334), and a pressure regulating pipe (335). The first water pipe (331) and the second water pipe (332) are connected by the hose (334). One end of the pressure regulating pipe (335) is threaded to the first water pipe (331), and the other end is threaded to the second water pipe (332). The hose (334) has an annular protrusion (53) on its outer wall. The pressure regulating pipe (335) has a pressure ring (54) on its inner wall. The pressure regulating pipe (335) has an outer abutment ring (58) on its outer wall. The outer abutment ring (58) has a slanted abutment groove (55). The bottom of the partition (9) has a second extension rod (56). The bottom of the second extension rod (56) has a second short shaft (57) for abutting against the slanted abutment groove (55).

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