Vacuum stirring equipment for USP modified cold patch asphalt

Abstract

The invention relates to the technical field of asphalt preparation, in particular to vacuum stirring equipment for USP modified cold patch asphalt, which comprises a fixed rack, a stirring barrel is mounted on the fixed rack through a plurality of fixed plates, a matching barrel is arranged above the stirring barrel, and a lifting mechanism for controlling the matching barrel to lift is arranged on the fixed rack. The matching barrel is composed of a lower shell and an upper shell, the lower shell and the upper shell are coaxially and rotationally matched, and a stirring part extending into the stirring barrel is arranged in the matching barrel. Air generated in the mixing process can be effectively reduced through vacuum stirring, so that a modified material is better dispersed, and the adhesive force and strength of asphalt are improved; meanwhile, moisture and other volatile substances in the asphalt can be removed through the vacuum environment, the stability of the asphalt is improved, and the service life of the asphalt is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt preparation, and in particular to a vacuum stirring device for USP modified cold patch asphalt. Background Art

[0002] Traditional repair asphalt is difficult to handle under low temperature conditions, and the repaired road surface is prone to cracking and other phenomena. For this reason, people have developed cold patch asphalt, which can be constructed at lower temperatures and provides a non-hot-melt repair method. However, the main problem encountered in the use of cold patch asphalt is its high viscosity and poor fluidity, which affects the construction efficiency and repair effect. In order to improve the workability and repair quality of cold patch asphalt, researchers have invented modified cold patch asphalt, which improves the performance of asphalt by adding a certain proportion of additives (such as polyvinyl alcohol, SBR emulsion, etc.).

[0003] For example, a heating and stirring device for asphalt materials with publication number CN206199091U has a structure of an outer vacuum zone and an inner heating zone. While the structure is simple and easy to operate, it heats by direct contact, increases the contact area with the raw material, and effectively accelerates production efficiency. The vacuum zone can reduce heat loss and improve the effective use rate of heat. However, the device still has some shortcomings:

[0004] 1. For traditional repair asphalt, even when heated, its viscosity is high and its fluidity is poor, which still makes it difficult to stir and mix. In addition, the heating process will cause a large amount of asphalt to adhere to the inner wall of the device, which is not conducive to the uniform mixing of the asphalt.

[0005] 2. For modified cold patch asphalt, the additionally added modifier is easy to decompose in a high temperature environment, resulting in uneven dispersion or the generation of bubbles, which ultimately affects the molding quality of the modified cold patch asphalt.

[0006] Therefore, the existing technology can only solve the problems of asphalt mixing and heating, and fails to fully meet the special requirements of modified cold patch asphalt, and there is still room for improvement. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a vacuum stirring device for USP modified cold patch asphalt.

[0008] A vacuum mixing device for USP modified cold patch asphalt comprises a fixed frame, a mixing barrel is mounted on the fixed frame via a plurality of fixed plates, a matching barrel is arranged above the mixing barrel, a lifting mechanism for controlling the lifting of the matching barrel is arranged on the fixed frame, the matching barrel consists of a lower shell and an upper shell, and the two are coaxially rotatable, and a stirring component extending into the mixing barrel is arranged in the matching barrel.

[0009] The stirring component comprises a receiving circular plate which is arranged to slide longitudinally in the barrel, a central column is arranged at the center of the receiving circular plate, and a plurality of auxiliary columns are arranged circumferentially on the receiving circular plate, and a stirring assembly is arranged at the lower ends of the central column and the auxiliary columns.

[0010] A matching disc coaxial with the upper shell is rotatably arranged at the bottom of the lower shell, and a vacuum pump is installed on the receiving circular plate. When the receiving circular plate moves down to the matching disc, the vacuum pump draws the gas in the mixing barrel into the matching barrel.

[0011] Preferably, the stirring assembly includes a center rod and a secondary rod, the center rod is slidably arranged in the center column and its lower end extends out of the center column, the secondary rod is slidably arranged in the secondary column and its lower end extends out of the secondary column, a circular hole for the center rod and the secondary rod to pass through is opened on the matching disc, and a bottom plate 1 and a bottom plate 2 are respectively installed at the lower ends of the center rod and the secondary rod, a stirring piece 1 is provided on the side wall of the center rod, and a stirring piece 2 is provided on the side wall of the secondary rod.

[0012] Preferably, the stirring member 1 includes a plurality of stirring rods 1 evenly hinged on the upper surface of a bottom plate 1, and the plurality of stirring rods 1 correspond to a plurality of auxiliary columns, and a groove for the upper end of a stirring rod 2 to abut against is provided on the side wall of the auxiliary column, and a sliding sleeve is provided on the side wall of the central column for longitudinal sliding, and a plurality of stirring rods 2 corresponding to the stirring rod 1 are hinged on the outer wall of the sliding sleeve, and the lower end of the stirring rod 2 is hinged to the stirring rod 1 near the upper end.

[0013] Preferably, the second stirring element includes an auxiliary mixing rod 1 hingedly installed on the bottom side wall of the auxiliary vertical rod, a sliding seat is provided on the side wall of the auxiliary vertical rod for longitudinal sliding, an auxiliary mixing rod 2 is hingedly installed on the sliding seat, and a side scraper rod is hinged between the auxiliary mixing rod 1 and the auxiliary mixing rod 2 at one end away from the auxiliary vertical rod.

[0014] Preferably, a pneumatic part is arranged on the top of the upper shell body, and the pneumatic part includes a pneumatic box arranged above the upper shell body, and the upper ends of the central column and the auxiliary column slide through the upper shell body and extend into the pneumatic box, and one side of the pneumatic box is connected with telescopic pipe 1 and telescopic pipe 2, and the other end of telescopic pipe 1 extends into the upper shell body through control valve 1, and the other end of telescopic pipe 2 is connected with the air inlet end of air pump 1 arranged on the outer wall of the upper shell body, and the air outlet end of air pump 1 extends into the upper shell body.

[0015] Preferably, a pushing circular plate is provided below the lower shell body, and the pushing circular plate slides in close contact with the inner wall of the mixing barrel, and a plurality of pushing columns are evenly arranged circumferentially between the matching disc and the top of the upper shell body, and the pushing column is a hollow shell structure, a pushing rod is slidably provided inside the pushing column, and the lower end of the pushing rod passes through the pushing column and is connected to the pushing circular plate.

[0016] Preferably, a push box with a hollow structure is installed on the top of the upper shell, and the upper end of the push column penetrates through the upper shell and extends into the push box, and the side wall of the push box is connected with connecting pipe 1 and connecting pipe 2, wherein the other end of connecting pipe 1 extends into the upper shell through control valve 2, and the other end of connecting pipe 2 is connected to the air inlet end of air pump 2 arranged on the outer wall of the upper shell, and the air outlet end of air pump 2 extends into the upper shell.

[0017] Preferably, the pushing circular plate is provided with a plurality of adapting holes for the central rod and the stirring member 1 folded thereon, and the secondary vertical rod and the stirring member 2 folded thereon to pass through.

[0018] Preferably, a sealing pad is provided at the lower end of the receiving circular plate, and the receiving circular plate is in contact with the matching disc through the sealing pad.

[0019] Preferably, the stirring rod 1 is hingedly installed with two floating rods along its length direction, the stirring rod 2 is hingedly provided with a connecting rod, the lower end of the connecting rod is hingedly provided with a connecting seat, and the connecting seat is slidably provided on the stirring rod 1.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The present invention can effectively reduce the air generated during the mixing process through vacuum stirring, so that the modified material can be better dispersed, and the adhesion and strength of the asphalt can be improved; at the same time, the vacuum environment can also remove moisture and other volatile substances in the asphalt, thereby improving the stability and service life of the asphalt.

[0022] Second, the present invention is provided with a stirring member 1 and a stirring member 2 that can be folded and stored, which can not only effectively stir all areas in the stirring barrel, but also can be stored when not in use, thereby reducing the space occupied when stored.

[0023] 3. The present invention can realize the up and down movement of the center rod and the auxiliary rod in the mixing barrel through the pneumatic parts, so that the stirring parts 1 and 2 can fully stir and mix the asphalt and the modifier in different depth areas in the mixing barrel, thereby improving the mixing effect.

[0024] Fourth, the present invention utilizes the pneumatic principle to drive the circular plate to move downward, squeeze the modified asphalt in the mixing barrel to discharge, and at the same time scrape the asphalt adhered to the inner wall of the mixing barrel downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the matching barrel of the present invention.

[0028] Figure 3 It is a schematic structural diagram of the stirring component of the present invention.

[0029] Figure 4 It is a plan view of the stirring member of the present invention.

[0030] Figure 5 The present invention Figure 4 A partial enlarged view of point A in the middle.

[0031] Figure 6 It is a structural schematic diagram of the stirring assembly of the present invention.

[0032] Figure 7 It is a schematic diagram of the structure between the stirring member 1 and the stirring member 2 of the present invention.

[0033] Figure 8 The present invention Figure 7 A partial enlarged view of point B in the middle.

[0034] Fig. 9 The present invention Figure 4 A partial enlarged view of point C in the middle.

[0035] Fig.10 It is a schematic diagram of the structure among the matching barrel, the pneumatic box, the pushing box and the pushing circular plate of the present invention.

[0036] In the figure, 1, fixed frame; 2, stirring barrel; 3, matching barrel; 31, lower shell; 32, upper shell; 11, lifting screw rod; 12, lifting plate; 301, driving motor; 302, driving gear; 303, gear ring; 40, receiving circular plate; 41, center column; 42, auxiliary column; 43, stirring assembly; 44, matching disc; 45, rotating screw rod; 46, vacuum pump; 47, sealing pad; 431, center rod; 432, auxiliary rod; 433, bottom plate 1; 434, bottom plate 2; 48, stirring member 1; 49, stirring member 2; 481, stirring rod 1; 482, sliding sleeve; 483. stirring rod 2; 484. floating rod; 485. connecting rod; 486. connecting seat; 491. auxiliary stirring rod 1; 492. sliding seat; 493. auxiliary stirring rod 2; 494. side scraping rod; 401. control rod; 402. winding drum; 403. wire rope; 404. steering pulley; 501. pneumatic box; 502. telescopic pipe 1; 503. telescopic pipe 2; 504. air pump 1; 601. pushing circular plate; 602. pushing column; 603. pushing rod; 604. pushing box; 605. connecting pipe 1; 606. connecting pipe 2; 607. air pump 2; 608. adapter hole. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-Figure 10 Embodiments of the present invention are described in detail.

[0038] The present application discloses a vacuum mixing device for USP modified cold patch asphalt. Through vacuum mixing, the air generated during the mixing process of the modified cold patch asphalt is effectively reduced, so that the modified material is better dispersed, thereby improving the adhesion and strength of the asphalt. At the same time, the vacuum environment can also remove moisture and other volatile substances in the asphalt, thereby improving the stability and service life of the asphalt.

[0039] Embodiment 1:

[0040] Reference Figure 1 As shown, a vacuum mixing equipment for USP modified cold patch asphalt includes a fixed frame 1, on which a mixing barrel 2 is mounted via a plurality of fixed plates, a feed pipe is provided on the side wall of the mixing barrel 2, and a discharge pipe is provided on the bottom side wall, after the asphalt raw material is introduced into the mixing barrel 2 through the feed pipe, a modifier is then added into the mixing barrel 2 through the feed pipe.

[0041] A matching barrel 3 is provided above the mixing barrel 2, and a lifting mechanism for controlling the lifting of the matching barrel 3 is provided on the fixed frame 1. A stirring component extending into the mixing barrel 2 is provided in the matching barrel 3, and the matching barrel 3 is driven downward by the lifting mechanism until the bottom of the matching barrel 3 is accurately sealed and docked with the top of the mixing barrel 2, and then the mixing barrel 2 is first evacuated by the stirring component to make the mixing barrel 2 in a negative pressure environment, thereby ensuring that the stirring component fully and evenly stirs and mixes the asphalt raw material and the modifier.

[0042] It should be noted that both the feed pipe and the discharge pipe are provided with valves to control their opening and closing, ensuring that when the interior of the mixing barrel 2 is in a negative pressure state, external environmental gas cannot enter the mixing barrel 2 through the feed pipe and the discharge pipe to affect the full mixing of the asphalt and modifier in the mixing barrel 2.

[0043] It can be seen that when preparing modified cold patch asphalt, the present invention can effectively reduce the air generated during the mixing process through vacuum stirring, so that the modified material can be better dispersed, and the adhesion and strength of the asphalt can be improved; at the same time, the vacuum environment can also remove moisture and other volatile substances in the asphalt, thereby improving the stability and service life of the asphalt.

[0044] Reference Figure 2 As shown, the mixing barrel 3 is composed of a lower shell 31 and an upper shell 32, and the two are coaxially rotatable. The present invention drives the upper shell 32 to rotate to achieve the stirring component to stir and mix the asphalt and the modifier in the mixing barrel 2.

[0045] A driving motor 301 is installed on the outer wall of the lower shell 31, and a driving gear 302 is installed on the output end of the driving motor 301. A gear ring 303 meshing with the driving gear 302 is sleeved on the outer wall of the upper shell 32. The driving motor 301 drives the driving gear 302 to rotate, and then the upper shell 32 is rotated under the meshing of the driving gear 302 and the gear ring 303, so as to drive the stirring component to mix and stir the asphalt raw materials in the mixing barrel 2.

[0046] Reference Figure 1 As shown, the lifting mechanism includes a lifting screw 11, and multiple lifting screws 11 are distributed on the fixed frame 1 in a circumferentially rotating manner. A lifting plate 12 threadedly connected to the lifting screw 11 is arranged on the side wall of the lower shell 31. By driving the rotation of the lifting screw 11, the longitudinal movement of the lower shell 31 is realized under the threaded cooperation of the lifting screw 11 and the lifting plate 12, that is, the synchronous lifting and lowering movement of the stirring component driven by the matching barrel 3 is realized.

[0047] Reference Figures 3 to 5 As shown, the stirring component includes a receiving circular plate 40 which is longitudinally slidably arranged in the barrel 3, a central column 41 is provided at the center of the receiving circular plate 40, and a plurality of auxiliary columns 42 are evenly distributed circumferentially around the central column 41, wherein the central column 41 and the auxiliary columns 42 are both hollow shell structures and the upper ends are both slidably passed through the top of the upper shell 32, and a stirring assembly 43 is commonly provided at the lower ends of the central column 41 and the auxiliary columns 42.

[0048] The rotating upper shell 32 will drive the receiving circular plate 40 , the central column 41 and the auxiliary column 42 to rotate synchronously, thereby causing the stirring assembly 43 to stir and mix the asphalt and the modifier in the stirring barrel 2 .

[0049] A matching disc 44 coaxial with the upper shell 32 is rotatably provided at the bottom of the lower shell 31, and a plurality of rotating screws 45 are rotatably provided between the matching disc 44 and the top of the upper shell 32, and the rotating screws 45 are threadedly connected with the receiving circular plate 40. A motor can be installed in the upper shell 32, and a driving gear is installed at the output end of the motor. A driven gear meshing with the driving gear is installed on the rotating screw 45 corresponding to the position of the motor, and then the motor can drive the rotating screw 45 to rotate, and the adjacent rotating screws 45 are driven by a sprocket chain to realize the synchronous and unidirectional rotation of all the rotating screws 45. The longitudinal movement of the receiving circular plate 40 in the matching barrel 3 is realized by driving the rotating screw 45 to rotate, and at the same time, the receiving circular plate 40 will drive the center column 41 and the auxiliary column 42 to move synchronously, and drive the stirring assembly 43 to move synchronously.

[0050] A vacuum pump 46 is installed on the receiving circular plate 40 . When the receiving circular plate 40 moves down to the matching disc 44 , the interior of the mixing barrel 2 and the matching barrel 3 are both closed spaces, and the vacuum pump 46 extracts the gas in the mixing barrel 2 into the matching barrel 3 .

[0051] Specifically, the air inlet end of the vacuum pump 46 is connected to an air inlet pipe, and the matching disc 44 is provided with an air inlet hole for the air inlet pipe to extend into the mixing barrel 2. The air outlet end of the vacuum pump 46 is connected to an air outlet pipe. The vacuum pump 46 extracts gas from the mixing barrel 2 through the air inlet pipe, and then discharges it into the matching barrel 3 through the air outlet pipe, so as to achieve a vacuum negative pressure environment in the mixing barrel 2.

[0052] In addition, a sealing pad 47 is provided at the lower end of the receiving circular plate 40 , and the receiving circular plate 40 contacts the matching circular plate 44 through the sealing pad 47 to achieve a sealing effect between the two, ensuring that the mixing barrel 2 is in a closed space.

[0053] Reference Figure 4 and Figure 5 As shown, the stirring assembly 43 includes a center rod 431 and a secondary rod 432, wherein the center rod 431 is slidably disposed in the center column 41 and its lower end extends out of the center column 41, the secondary rod 432 is slidably disposed in the secondary column 42 and its lower end extends out of the secondary column 42, and a circular hole for the center rod 431 and the secondary rod 432 to pass through is opened on the matching disc 44, and a bottom plate 433 and a bottom plate 434 are respectively installed at the lower ends of the center rod 431 and the secondary rod 432, and the bottom plate 1 433 and the bottom plate 2 434 are used to seal the circular hole on the matching disc 44 to ensure that after the stirring is completed, the stirring assembly 43 can still ensure the sealing inside the stirring barrel 2 when it is stored.

[0054] A stirring member 1 48 is provided on the side wall of the central rod 431 , and a stirring member 2 49 is provided on the side wall of the auxiliary vertical rod 432 . The asphalt and the modifier in the mixing barrel 2 are fully stirred and mixed by the stirring member 1 48 and the stirring member 2 49 .

[0055] Embodiment 2:

[0056] On the basis of embodiment one, in order to ensure that stirring member 1 48 and stirring member 2 49 can effectively stir all areas in the stirring barrel 2 and can also be stored when not in use to reduce the space occupied when stored, this embodiment discloses a stirring member 1 48 and stirring member 2 49 that can be folded and stored.

[0057] Reference Figure 6 and Figure 7 As shown, specifically, the stirring member 48 includes a plurality of stirring rods 481 circumferentially evenly hinged on the upper surface of the bottom plate 433, and the plurality of stirring rods 481 correspond to a plurality of auxiliary columns 42. The side walls of the auxiliary columns 42 are provided with grooves for the upper ends of the stirring rods 483 to abut against, so as to achieve coordinated synchronization among the auxiliary columns 42, the stirring rods 481 and the central column 41.

[0058] A sliding sleeve 482 is longitudinally slidably provided on the side wall of the central column 41, and a plurality of stirring rods 483 corresponding to the stirring rods 481 are hinged on the outer side wall of the sliding sleeve 482, and the lower end of the stirring rod 483 is hinged to the stirring rod 481 near the upper end.

[0059] When the center rod 431 and the auxiliary rod 432 rotate, they can drive the stirring rod 1 481 and the stirring rod 2 483 to rotate synchronously, so as to fully stir and mix the asphalt and the modifier in the mixing barrel 2. At the same time, the sliding sleeve 482 can drive the upper end of the stirring rod 2 483 to move longitudinally to change the angle between the stirring rod 2 483 and the center rod 431. At the same time, the stirring rod 2 483 will also drive the stirring rod 1 481 to rotate, that is, the stirring rod 1 481 rotates about the hinge center of its lower end, and finally realizes the folding and stretching of the stirring rod 1 481 and the stirring rod 2 483.

[0060] In summary, by using the sliding sleeve 482 to achieve longitudinal movement of the upper end of the stirring rod 2 483, not only can the angle between the stirring rod 1 481 and the stirring rod 2 483 be changed to make the stirring more uniform, but also the folding and stretching action of the stirring rod 1 481 can be made more flexible.

[0061] The stirring rod 1 481 is hingedly installed with two floating rods 484 along its length direction. The floating rods 484 are in a vertical state under the influence of gravity, that is, under the influence of other forces except gravity, no matter how the angle between the stirring rod 1 481 and the center rod 431 changes, the floating rods 484 are always in a vertical state. By setting the floating rods 484, the stirring effect can be improved. At the same time, during the rotation of the center rod 431, the floating rods 484 are affected by the centrifugal force and can be deflected in a direction away from the center rod 431, that is, the rotating center rod 431 can change the angle of the floating rods 484, further improving the stirring effect of the floating rods 484 on the asphalt and the modifier in the mixing barrel 2.

[0062] Reference Figure 7 and Figure 8 As shown, a connecting rod 485 is hinged on the stirring rod 483, and a connecting seat 486 is hinged at the lower end of the connecting rod 485. The connecting seat 486 is slidably arranged on the stirring rod 1 481. The connecting rod 485 is provided to improve the stirring effect of the asphalt and the modifier in the area between the stirring rod 1 481 and the stirring rod 2 483. When the sliding sleeve 482 slides longitudinally along the central rod 431, the angle of the stirring rod 2 483 will be changed, and the angle of the stirring rod 1 481 will also be changed. When the angle of the stirring rod 2 483 is changed, the position of the connecting rod 485 will also change, and the angle of the stirring rod 1 481 will also change with the stirring rod 2 483. Therefore, the connecting seat 486 at the lower end of the connecting rod 485 will slide along the length direction of the stirring rod 1 481.

[0063] Continue to refer to Figure 6 and Figure 7 As shown, the stirring element 49 includes an auxiliary mixing rod 1 491 hingedly installed on the bottom side wall of the auxiliary vertical rod 432, a sliding seat 492 is provided on the side wall of the auxiliary vertical rod 432 for longitudinal sliding, an auxiliary mixing rod 2 493 is hingedly installed on the sliding seat 492, and a side scraper rod 494 is hinged between the auxiliary mixing rod 1 491 and the end of the auxiliary mixing rod 2 493 away from the auxiliary vertical rod 432.

[0064] When the sliding seat 492 moves downward along the auxiliary vertical rod 432, it will drive the upper end of the auxiliary mixing rod 493 to move downward synchronously, and then change the angle of the auxiliary mixing rod 491 through the side scraper 494, and when the side scraper 494 is in a vertical state and close to the inner wall of the mixing barrel 2, it is the final expanded state, so that the auxiliary mixing rod 491 and the auxiliary mixing rod 493 can mix the asphalt and modifier in the area between the auxiliary vertical rod 432 and the side wall of the mixing barrel 2, and at the same time, the side scraper 494 can scrape off the asphalt adhered to the inner wall of the mixing barrel 2 to facilitate more thorough mixing.

[0065] Reference Figure 5 and Fig. 9 As shown, in this embodiment, a control component for controlling the movement of the sliding sleeve 482 and the sliding seat 492 is arranged on the receiving circular plate 40. Specifically, the control component includes a plurality of control rods 401 that are vertically rotatable and penetrated on the receiving circular plate 40. The plurality of control rods 401 correspond to the central rod 431 and the plurality of auxiliary vertical rods 432, respectively. A sealing pad 47 is penetrated at the lower end of the control rod 401 and is placed in a circular hole. A winding drum 402 is installed at the lower end of the control rod 401. A sufficiently long steel wire rope 403 is wound on the winding drum 402. A steering pulley 404 is provided on the central rod 431 and the auxiliary vertical rod 432. The other end of the steel wire rope 403 is connected to the corresponding sliding seat 492 or the sliding sleeve 482 after passing through the steering pulley 404.

[0066] When the control rod 401 is driven to rotate, the winding drum 402 will be driven to rotate synchronously, and the steel wire rope 403 will be wound around the winding drum 402 or released from the winding drum 402. That is, when the steel wire rope 403 is released from the winding drum 402, the sliding sleeve 482 and the sliding seat 492 will slide downward under the action of gravity until the stirring member 1 48 and the stirring member 2 49 are in the final unfolded state, so as to fully stir and mix the asphalt and the modifier in the mixing barrel 2; when the steel wire rope 403 is wound around the winding drum 402, the sliding sleeve 482 and the sliding seat 492 can be pulled upward, so that the stirring member 1 48 and the stirring member 2 49 are in a folded and stored state.

[0067] In addition, when the center rod 431 and the auxiliary rod 432 rotate, the stirring member 1 48 and the stirring member 2 49 stir and mix the asphalt and the modifier, and the control component can repeatedly control the control rod 401 to rotate forward and reverse, so that the winding drum 402 can repeatedly wind and loosen the wire rope 403, and then the sliding sleeve 482 and the sliding seat 492 can repeatedly move in the longitudinal direction, that is, the stirring member 1 48 and the stirring member 2 49 are repeatedly folded and transformed, that is, during the stirring process, the stirring member 1 48 and the stirring member 2 49 are repeatedly folded and transformed, which can improve the sufficient stirring and mixing of the asphalt and the modifier.

[0068] In addition, a plurality of servo motors connected to corresponding control rods 401 are installed on the receiving circular plate 40 to control the forward and reverse rotation of the control rods 401, or a plurality of control rods 401 corresponding to the secondary vertical rods 432 are connected by belt transmission or chain transmission to reduce the number of servo motors used.

[0069] Embodiment three:

[0070] On the basis of Example 1 and Example 2, in order to improve the mixing of asphalt and modifier in multiple longitudinal regions in the mixing barrel 2 by the stirring component 43, that is, the mixing between the longitudinal regions, this embodiment is provided with a pneumatic part on the top of the upper shell 32, which is used to control the longitudinal sliding of the central rod 431 and the auxiliary vertical rod 432 along the corresponding central column 41 and the auxiliary vertical column 42, so as to drive the stirring member 1 48 and the stirring member 2 49 to move longitudinally in the mixing barrel 2, so that asphalt of different longitudinal depths can be fully mixed. At the same time, in the process of moving up and down, mixing between asphalt of different longitudinal depths can be achieved, thereby improving the mixing effect of asphalt and modifier.

[0071] Specifically, refer to Figures 3 to 5 as well as Figure 2 , Fig.10 As shown, the pneumatic parts include a pneumatic box 501 arranged above the upper shell body 32, and the upper ends of the central column 41 and the auxiliary column 42 slide through the upper shell body 32 and then extend into the pneumatic box 501. One side of the pneumatic box 501 is connected with a telescopic pipe 1 502 and a telescopic pipe 2 503, and the other end of the telescopic pipe 1 502 extends into the upper shell body 32 through a control valve 1, and the other end of the telescopic pipe 2 503 is connected to the air inlet end of an air pump 1 504 arranged on the outer wall of the upper shell body 32, and the air outlet end of the air pump 1 504 extends into the upper shell body 32.

[0072] Since the vacuum pump 46 draws the gas in the mixing barrel 2 into the matching barrel 3, the matching barrel 3 will have gas at a pressure higher than the atmospheric pressure. When the control valve is opened, the high-pressure gas in the matching barrel 3 will enter the pneumatic box 501 through the telescopic pipe 1 502, and then enter the central column 41 and the auxiliary column 42, thereby pushing the central rod 431 and the auxiliary rod 432 downward through the air pressure, so as to drive the stirring piece 1 48 and the stirring piece 2 49 to move downward, so as to achieve the mixing of asphalt in different depth areas, improve the stirring effect, and When it moves down to the bottom of the mixing barrel 2, the control valve 1 is closed at this time, and the air pump 1 504 draws the gas in the pneumatic box 501 through the telescopic pipe 2 503 and returns it to the matching barrel 3. The gas pressure in the pneumatic box 501 is less than the atmospheric pressure, so that the central rod 431 and the auxiliary vertical rod 432 drive the corresponding stirring member 1 48 and stirring member 2 49 to move upward. In this way, the stirring member 1 48 and stirring member 2 49 can be repeatedly moved up and down through the mutual cooperation of the control valve 1 and the air pump 1 504, thereby improving the stirring and mixing effect between the asphalt and the modifier.

[0073] In addition, it should be noted that there is no direct connection between the pneumatic box 501 and the upper shell 32. The two are in a contact relationship to ensure that when the rotating screw 45 rotates to drive the receiving circular plate 40 to move up and down, the center column 41 and the auxiliary column 42 move up and down synchronously with the receiving circular plate 40, and the pneumatic box 501 moves synchronously with the center column 41 and the auxiliary column 42.

[0074] In addition, in order to prevent the center rod 431 and the auxiliary vertical rod 432 from driving the corresponding stirring members 1 48 and 2 49 to move up and down, which will affect the folding and stretching control of the stirring members 1 48 and 2 49 by the wire rope 403, for this reason, the present embodiment needs to limit that when the winding drum 402 releases the restriction on the wire rope 403, it is necessary to ensure that the wire rope 403 has a sufficient length reserved to ensure that when the stirring members 1 48 and 2 49 move down to the bottom of the mixing barrel 2, the stirring members 1 48 and 2 49 can still be unfolded to the final extended state.

[0075] Embodiment 4:

[0076] On the basis of Example 1, Example 2 and Example 3, since the present invention is based on the stirring and mixing of asphalt and modifier under a vacuum negative pressure environment, the asphalt adhesion to the device can be effectively reduced under the vacuum negative pressure state. However, the present invention is based on a certain negative pressure, that is, it is not based on an absolute vacuum environment. A certain amount of asphalt will still adhere to the inner wall of the mixing barrel 2 and related parts such as the mixing component. For this reason, when the present invention drives the receiving circular plate 40 to move upward by rotating the screw 45, the asphalt adhered to the mixing component 43 is centrifuged and thrown off by rotating the centrifuge.

[0077] At the same time, in order to ensure that the asphalt in the mixing barrel 2 is discharged smoothly and avoid a large amount of asphalt adhering to the mixing barrel 2, refer to Figure 2 , Figure 4 , Figure 5 and Fig.10 As shown, in this embodiment, a push circular plate 601 is arranged below the lower shell 31, and the push circular plate 601 slides in contact with the inner wall of the mixing barrel 2, and a plurality of push columns 602 are evenly arranged circumferentially between the matching disc 44 and the top of the upper shell 32, and the push columns 602 are hollow shell structures, and a push rod 603 is slidably arranged inside the push column 602, and the lower end of the push rod 603 passes through the push column 602 and is connected to the push circular plate 601. By driving the push rod 603 to slide longitudinally inside the push column 602, the push circular plate 601 is controlled to slide longitudinally inside the mixing barrel 2.

[0078] A hollow push box 604 is installed on the top of the upper shell 32, and the upper end of the push column 602 penetrates the upper shell 32 and extends into the push box 604, and the side wall of the push box 604 is connected with a connecting pipe 1 605 and a connecting pipe 2 606, wherein the other end of the connecting pipe 1 605 extends into the upper shell 32 through the control valve 2, and the other end of the connecting pipe 2 606 is connected to the air inlet end of the air pump 2 607 arranged on the outer wall of the upper shell 32, and the air outlet end of the air pump 2 607 extends into the upper shell 32.

[0079] During specific operation, after the modified asphalt is stirred and mixed, the central column 41 and the auxiliary column 42 are driven upward by the receiving circular plate 40 to realize the synchronous upward movement of the folded stirring member 1 48 and the stirring member 2 49. Then, when the modified asphalt in the mixing barrel 2 needs to be discharged through the discharge pipe, the control valve 2 is opened, and the high air pressure in the matching barrel 3 is passed into the pushing box 604 through the connecting pipe 1 605, and then enters the pushing column 602, so as to push the pushing rod 603 downward, thereby driving the pushing circular plate 601 downward, squeezing the modified asphalt in the mixing barrel 2 to discharge it, and at the same time scraping the asphalt adhered to the inner wall of the mixing barrel 2 downward. After the modified asphalt is discharged, the control valve 2 is closed, and the air pump 2 607 is opened to re-deliver the gas in the pushing box 604 back to the matching barrel 3, so that the pushing circular plate 601 can be smoothly moved up and reset.

[0080] It should be noted that, since the push circular plate 601 is arranged below the matching barrel 3, and the stirring assembly 43 needs to pass through the push circular plate 601 and extend into the stirring barrel 2, a plurality of adapter holes 608 are provided on the push circular plate 601 for the central rod 431 and the stirring member 1 48 folded thereon, and the auxiliary vertical rod 432 and the stirring member 2 49 folded thereon to pass through. The opening of the adapter holes 608 will affect the discharge of the modified asphalt, so it is necessary to limit the diameter of the adapter holes 608 to be smaller than 1. Corresponding to the diameter of the bottom plate 1 433 and the bottom plate 2 434, that is, when the receiving circular plate 40 drives the central column 41 and the auxiliary column 42 to move upward, the bottom plate 1 433 and the bottom plate 2 434 block the corresponding adapter hole 608 on the pushing circular plate 601, and then when the pushing circular plate 601 moves downward, it will drive the bottom plate 1 433 and the bottom plate 2 434 to move downward synchronously, that is, the central rod 431 and the auxiliary rod 432 move downward synchronously, so as to avoid the influence of the adapter hole 608 on the extruded modified asphalt.

[0081] In addition, the air pressure in the pneumatic box 501 is lower than the external atmospheric pressure. Therefore, when gas is transported into the pushing box 604, gas is also transported to the pneumatic box 501 to ensure that the pushing circular plate 601, the bottom plate 1 433 and the bottom plate 2 434 move downward synchronously. It should be noted that the descending speed of the bottom plate 1 433 and the bottom plate 2 434 is lower than the downward moving speed of the pushing circular plate 601 to prevent leakage of the adapter hole 608 and affect the discharge of the modified asphalt.

[0082] In addition, when the lifting screw 11 drives the matching barrel 3 to move up and down, the pushing circular plate 601 is pushed in and out of the mixing barrel 2 through the cooperation of the pushing column 602 and the pushing rod 603 .

[0083] In summary, based on the above-mentioned contents, the present invention can conclude that the stirring member 1 48 and the stirring member 2 49 have multiple sections of longitudinal movement. The first section is the longitudinal movement between the center column 41 and the center rod 431 and between the auxiliary column 42 and the auxiliary rod 432, and its purpose is to drive the stirring member 1 48 and the stirring member 2 49 to fully stir the asphalt of different depths in the mixing barrel 2; the second section is that when the rotating screw 45 rotates, it will drive the synchronous longitudinal movement of the center column 41 and the center rod 431, that is, it will drive the synchronous movement of the stirring member 1 48 and the stirring member 2 49. The purpose of the longitudinal movement is to move the stirring piece 1 48 and the stirring piece 2 49 up to the top of the asphalt in the mixing barrel 2 after being folded and stored, so as to facilitate the subsequent discharge of the asphalt that has been stirred in the mixing barrel 2; the third section is to drive the matching barrel 3 to move up and down through the lifting screw 11, so as to drive the stirring piece 1 48 and the stirring piece 2 49 to move synchronously, and its purpose is to drive the stirring component to separate from the mixing barrel 2, that is, to move the stirring piece 1 48 and the stirring piece 2 49 out of the mixing barrel 2, so as to facilitate the subsequent cleaning of the mixing barrel 2, the matching barrel 3 and the stirring component and other related parts.

[0084] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0085] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vacuum mixing device for USP modified cold patch asphalt, comprising a fixed frame (1), a mixing barrel (2) being mounted on the fixed frame (1) via a plurality of fixed plates, a matching barrel (3) being arranged above the mixing barrel (2), and a lifting mechanism for controlling the lifting of the matching barrel (3) being arranged on the fixed frame (1), characterized in that: The matching barrel (3) is composed of a lower shell (31) and an upper shell (32), and the two are coaxially rotatable. A stirring component extending into the stirring barrel (2) is provided in the matching barrel (3); The stirring component comprises a receiving circular plate (40) arranged to slide longitudinally in the matching barrel (3); a central column (41) is provided at the center of the receiving circular plate (40); and a plurality of auxiliary columns (42) are provided circumferentially on the receiving circular plate (40); and a stirring assembly (43) is provided at the lower ends of the central column (41) and the auxiliary columns (42); A matching disc (44) coaxial with the upper shell (32) is rotatably provided at the bottom of the lower shell (31), and a vacuum pump (46) is installed on the receiving circular plate (40). When the receiving circular plate (40) moves downward onto the matching disc (44), the vacuum pump (46) extracts the gas in the stirring barrel (2) into the matching barrel (3).

2. A vacuum mixing device for USP modified cold patch asphalt according to claim 1, characterized in that: The stirring assembly (43) comprises a central rod (431) and a secondary vertical rod (432). The central rod (431) is slidably arranged in the central column (41) and its lower end extends out of the central column (41). The secondary vertical rod (432) is slidably arranged in the secondary vertical column (42) and its lower end extends out of the secondary vertical column (42). A circular hole for the central rod (431) and the secondary vertical rod (432) to pass through is opened on the matching disk (44). A bottom plate 1 (433) and a bottom plate 2 (434) are respectively installed at the lower ends of the central rod (431) and the secondary vertical rod (432). A stirring member 1 (48) is arranged on the side wall of the central rod (431), and a stirring member 2 (49) is arranged on the side wall of the secondary vertical rod (432).

3. A vacuum mixing device for USP modified cold patch asphalt according to claim 2, characterized in that: The stirring member (48) comprises a plurality of stirring rods (481) evenly hinged on the upper surface of the bottom plate (433) in the circumferential direction, and the plurality of stirring rods (481) correspond to a plurality of auxiliary columns (42). A groove for the upper end of the second stirring rod (483) to abut against is provided on the side wall of the auxiliary column (42). A sliding sleeve (482) is provided on the side wall of the central column (41) for longitudinal sliding. The outer side wall of the sliding sleeve (482) is hinged with a plurality of second stirring rods (483) corresponding to the first stirring rod (481). The lower end of the second stirring rod (483) is hinged with the stirring rod (481) near the upper end.

4. A vacuum mixing device for USP modified cold patch asphalt according to claim 2, characterized in that: The stirring element 2 (49) comprises a secondary stirring rod 1 (491) hingedly mounted on the side wall at the bottom of the secondary vertical rod (432); a sliding seat (492) is longitudinally slidably provided on the side wall of the secondary vertical rod (432); a secondary stirring rod 2 (493) is hingedly mounted on the sliding seat (492); and a side scraping rod (494) is hingedly mounted between the ends of the secondary stirring rod 1 (491) and the secondary stirring rod 2 (493) away from the secondary vertical rod (432).

5. The vacuum mixing equipment for USP modified cold patch asphalt according to claim 2, characterized in that: A pneumatic part is arranged on the top of the upper shell (32), and the pneumatic part includes a pneumatic box (501) arranged above the upper shell (32); the upper ends of the central column (41) and the auxiliary column (42) slide through the upper shell (32) and then extend into the pneumatic box (501); one side of the pneumatic box (501) is connected with a telescopic pipe 1 (502) and a telescopic pipe 2 (503); the other end of the telescopic pipe 1 (502) extends into the upper shell (32) through a control valve 1; the other end of the telescopic pipe 2 (503) is connected with an air inlet end of an air pump 1 (504) arranged on the outer wall of the upper shell (32); and the air outlet end of the air pump 1 (504) extends into the upper shell (32).

6. A vacuum mixing device for USP modified cold patch asphalt according to claim 2, characterized in that: A pushing circular plate (601) is arranged below the lower shell (31), and the pushing circular plate (601) slides in contact with the inner wall of the mixing barrel (2). A plurality of pushing columns (602) are evenly arranged circumferentially between the matching disc (44) and the top of the upper shell (32), and the pushing columns (602) are hollow shell structures. A pushing rod (603) is slidably arranged inside the pushing column (602), and the lower end of the pushing rod (603) passes through the pushing column (602) and is connected to the pushing circular plate (601).

7. A vacuum mixing device for USP modified cold patch asphalt according to claim 6, characterized in that: A push box (604) with a hollow structure is installed on the top of the upper shell (32), and the upper end of the push column (602) penetrates the upper shell (32) and extends into the push box (604), and the side wall of the push box (604) is connected with a connecting pipe 1 (605) and a connecting pipe 2 (606), wherein the other end of the connecting pipe 1 (605) extends into the upper shell (32) through the control valve 2, and the other end of the connecting pipe 2 (606) is connected to the air inlet end of the air pump 2 (607) arranged on the outer wall of the upper shell (32), and the air outlet end of the air pump 2 (607) extends into the upper shell (32).

8. The vacuum mixing equipment for USP modified cold patch asphalt according to claim 6, characterized in that: The pushing circular plate (601) is provided with a plurality of matching holes (608) for the central rod (431) and the first stirring piece (48) folded thereon, as well as the auxiliary vertical rod (432) and the second stirring piece (49) folded thereon to pass through.

9. The vacuum mixing equipment for USP modified cold patch asphalt according to claim 1, characterized in that: A sealing pad (47) is provided at the lower end of the receiving circular plate (40), and the receiving circular plate (40) contacts the matching circular disc (44) through the sealing pad (47).

10. The vacuum mixing equipment for USP modified cold patch asphalt according to claim 3, characterized in that: The stirring rod 1 (481) is hingedly mounted with two floating rods (484) along its length direction, the stirring rod 2 (483) is hingedly mounted with a connecting rod (485), the lower end of the connecting rod (485) is hingedly mounted with a connecting seat (486), and the connecting seat (486) is slidably mounted on the stirring rod 1 (481).

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