Asphalt distribution device and method suitable for additional paving of airport runway

Abstract

The invention discloses an asphalt distributing device and method suitable for additional paving of an airport runway, and relates to the technical field of spiral conveying equipment.The asphalt distributing device comprises an asphalt paving machine body and an auger body used for distributing asphalt, and a discharging port in the asphalt paving machine body corresponds to the midpoint of the auger body; the auger main body is equally divided into two parts by taking the middle point of the length of the auger main body as a boundary, and conveying blades with opposite screw directions are arranged on the two parts and are used for conveying asphalt to the two sides of the auger main body; a limiting blade main body; in the invention, when asphalt reaches the end along the conveying blade, as the screw direction of the limiting blade main body is opposite to that of the conveying blade and the auger main body rotates, the pushing forces of the limiting blade main body and the conveying blade main body abut against each other, the asphalt can be prevented from being thrown out, the conveying blade pushes the asphalt to move leftwards and the limiting blade main body pushes rightwards, and the asphalt is limited in a paving range; the starting end of the limiting blade body abuts against the side wall of the conveying blade to form a limiting area, and asphalt enters the limiting area and then rotates to the lower portion to fall off and cannot be thrown out of the paving range.

Description

Technical Field

[0001] The invention relates to the technical field of screw conveying equipment, and in particular to an asphalt spreading device and method suitable for paving an airport runway. Background Art

[0002] Asphalt pavement refers to various types of pavement paved with road asphalt materials mixed into mineral materials. The asphalt binder improves the ability of paving aggregate to resist damage to the road surface caused by driving and natural factors, making the road surface smooth, dust-free, waterproof and durable.

[0003] The auger is also called a screw conveyor. Its basic function is to transport materials. In an asphalt paving machine, asphalt is in a relatively viscous state. The auger can continuously transport the asphalt in the storage bin to the location where it needs to be paved. When its spiral blades rotate, they can push the asphalt forward like an auger, ensuring a stable supply of asphalt from a centralized storage area (such as a hopper) to the paving surface.

[0004] When the asphalt is pushed by the auger, its movement state is similar to that of a viscous fluid. When the auger rotates, the asphalt near the edge of the auger blade is subjected to a large tangential force and tends to move outward. The asphalt is also affected by the centrifugal force generated by the rotation of the auger, causing the asphalt at the edge to be thrown outward, causing the asphalt to exceed the normal paving range. In addition, when the asphalt is thrown out at the edge of the auger, from the perspective of force distribution, since the tangential force and centrifugal force mainly push the asphalt outward away from the main body of the auger, in this process, while the asphalt at the edge moves outward, there is no equal amount of asphalt to replenish the original thickness.

[0005] In actual construction, people usually hope to obtain a relatively flat road surface with neat edges. In order to achieve a relatively balanced state, the thrown asphalt will spread to the surroundings as much as possible, causing the asphalt thickness at the edge to gradually decrease, eventually resulting in very thin asphalt at the edge. The thinning of the edge asphalt will lead to a decrease in the structural strength of the edge of the road. The strength of the asphalt pavement mainly comes from the bonding between the asphalt mixture and the mutual embedding of the aggregates. When the edge asphalt layer is too thin, the bonding force between the aggregates is insufficient. When bearing vehicle loads, the edge is prone to cracks, looseness and other defects. Summary of the invention

[0006] The object of the present invention is to provide an asphalt spreading device suitable for paving an airport runway, so as to solve the problems raised in the above-mentioned background technology.

[0007] Another object of the present invention is to provide a method.

[0008] In order to solve the above technical problems, the present invention provides an asphalt spreading device suitable for airport runway paving, including an asphalt paving machine body and an auger body for spreading asphalt, the discharge port on the asphalt paving machine body is set corresponding to the midpoint of the auger body, including, the auger body is divided into two parts with the midpoint of its length as the boundary, the two parts are provided with conveying blades with opposite spiral directions, which are used to convey asphalt to both sides of the auger body; a limiting blade body is arranged on the auger body and located at the edge end of the conveying blade, the limiting blade body and the conveying blade are arranged with the opposite spiral direction and the same pitch, the starting end of the limiting blade body is against the side wall of the conveying blade to form a limiting area, which is used to limit the asphalt from being thrown out at the end of the auger body.

[0009] Furthermore, the limiting blade body includes a first limiting blade, which is rotatably arranged on the auger body, and the outer wall of which abuts against the edge end of the conveying blade, and forms a variable diversion area between the blade and the edge end surface of the conveying blade; a third limiting blade is arranged in an inclined shape, one end of which abuts against the conveying blade, and the other end is away from the conveying blade. The third limiting blade is rotatably connected to the auger body through a rotating shaft, and is located at the entrance of the diversion area, and is used to open or close the entrance of the diversion area when swinging left and right;

[0010] The fourth limiting blade is fixed on the auger body and is located between the first limiting blade and the third limiting blade. The end of the fourth limiting blade away from the third limiting blade is located on the side of the first limiting blade away from the conveying blade. The end of the fourth limiting blade away from the first limiting blade extends to the side of the third limiting blade corresponding to the conveying blade, and protrudes from the edge end of the third limiting blade away from the conveying blade, so as to guide the asphalt from the first limiting blade to the third limiting blade.

[0011] Furthermore, the auger body is provided with a cavity, the auger body is connected with a reciprocating and rotatable mounting rod, the outer wall of the mounting rod is provided with a second limiting blade, and the second limiting blade is located on one side of the third limiting blade;

[0012] The cavity is provided with a driving member for driving the installation rod to move and the first limiting blade to rotate, and a driving part for driving the installation rod to rotate; the driving member at least includes a rotatable connecting rod, one end of which is connected to the first limiting blade, and the other end is inserted through the auger body to extend into the cavity and is connected to a gear assembly, which is used to drive the installation rod and the driving part together when the connecting rod rotates.

[0013] Furthermore, the driving part includes a stepper motor arranged in the cavity, a laterally movable fixed seat is arranged in the cavity, the fixed seat is provided with a socket, one end of the mounting rod located in the cavity is inserted into the socket and connected to the driving end of the stepper motor, the inner wall of the socket is abutted against the outer wall of the mounting rod, and the stepper motor is installed on the outer wall of the fixed seat.

[0014] Furthermore, the gear assembly includes a gear installed on the outer wall of the connecting rod, and a rack meshing with the gear. A fixing rod is installed on the inner wall of the cavity, and the fixing rod is rectangular. The rack is slidably connected to the outer wall of the fixing rod. The fixing seat is provided with a through groove. A fixing plate is installed on the outer wall of the rack. The fixing plate extends from one end of the fixing plate away from the rack into the through groove and abuts against the inner wall of the through groove.

[0015] Furthermore, the driving member also includes a servo motor arranged in the cavity, the driving end of the servo motor is connected to one end of the connecting rod located in the cavity, the outer wall of the connecting rod is rotatably connected to the auger body, the inner wall of the cavity is installed with a fixed block, and the servo motor is installed on the outer wall of the fixed block.

[0016] Furthermore, a support block is installed on the inner wall of the cavity, and two slide grooves are provided on the outer wall of the support block. Two groups of balls are rotatably connected to the outer wall of the fixed seat, and the balls are slidably buckled inside the slide grooves.

[0017] Further, a chamber is provided inside the fixing seat, a strip plate movable along the long axis direction of the chamber is provided inside the chamber, the outer wall of the strip plate abuts against the inner wall of the chamber, the strip plate is provided with a trapezoidal groove, the fixing seat is provided with a slot, one end of the slot is connected to the through slot, and the other end is connected to the trapezoidal groove;

[0018] A resistance block is installed on the side wall of the fixed plate located in the through groove, and the end of the resistance block away from the fixed plate extends through the slot to the inside of the trapezoidal slot, the resistance block and the trapezoidal slot are integrally formed with an inclined surface, and the inclined surface of the resistance block abuts against the inclined surface of the trapezoidal slot, a return spring is connected between one end of the strip plate and the inner wall of the chamber, the support block is provided with a slot, and the end of the strip plate away from the return spring is inserted into the slot, and the side length of the slot is the same as the side length of the strip plate.

[0019] Further, the auger body is provided with a strip opening, the cavity is connected to the strip opening, one end of the mounting rod passes through the strip opening to extend into the cavity, and the other end passes through the strip opening to extend to the outside of the auger body, and the mounting rod reciprocates along the long axis direction of the strip opening;

[0020] Two rubber sleeves are installed on the inner wall of the strip opening, and the two rubber sleeves are abutted against each other at a side away from the strip opening. The inner wall of the rubber sleeve is connected to a bottom plate, and a tension spring is connected between one end of the bottom plate and the inner wall of the strip opening. An insertion rod is installed at one end of the bottom plate, and the end of the insertion rod away from the bottom plate is inserted into the auger body.

[0021] Furthermore, the first limiting blade is connected to the outer wall of the connecting rod, the inner diameters of the first limiting blade, the third limiting blade and the fourth limiting blade all correspond to the auger body and are close to the auger body, the second limiting blade is connected to the outer wall of the mounting rod, and the support block is positioned close to the strip opening.

[0022] A method comprises any of the above-mentioned asphalt spreading devices suitable for airport runway paving.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the present invention, when the asphalt reaches the end along the conveying blade, because the spiral direction of the limiting blade body is opposite to that of the conveying blade, when the auger body rotates, the thrusts of the two counteract each other, which can prevent the asphalt from being thrown out. The conveying blade pushes the asphalt to the left, and the limiting blade body pushes to the right, limiting the asphalt within the paving range, and the starting end of the limiting blade body abuts against the side wall of the conveying blade to form a limiting area. After the asphalt enters, it turns to the bottom and falls, and will not be thrown out of the paving range.

[0025] 2. In the present invention, the auger body and the conveying blades rotate clockwise. When the asphalt reaches the end of the conveying blades, it first meets the first limiting blade and then the fourth limiting blade. Their thrust is opposite to that of the conveying blades to suppress the asphalt from being thrown out. The third limiting blade and the conveying blade form a limiting area, which then rotates to open the diversion area, and the asphalt enters. The first limiting blade can rotate to adjust the size of the diversion area. Narrowing it can thicken the asphalt, and widening it can expand the paving range, which is beneficial to road construction.

[0026] 3. In the present invention, the driving part drives the mounting rod to rotate the second limiting blade, and the second limiting blade can stabilize the third limiting blade when it is against the third limiting blade. When the diversion area needs to be opened, the connecting rod is driven to rotate, and the first limiting blade is driven to rotate through the connecting rod. The rotation of the connecting rod drives the gear assembly to transmit, thereby moving the driving part and the second limiting blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the connection structure between the auger body and the conveying blades in the present invention;

[0029] Figure 3 It is a schematic diagram of the connection structure between the first limiting blade and the connecting rod in the present invention;

[0030] Figure 4 It is a schematic diagram of the connection structure between the auger body and the strip-shaped opening in the present invention;

[0031] Figure 5 Schematic diagram of the connection structure between the second limiting blade and the third limiting blade in the present invention;

[0032] Figure 6 It is a schematic diagram of the top view of the structure of the auger body in the present invention;

[0033] Figure 7 It is a schematic diagram of the connection structure between the third limiting blade and the rotating shaft in the present invention;

[0034] Figure 8 It is a schematic diagram of the connection structure between the auger body and the fixing rod in the present invention;

[0035] Fig. 9 It is a schematic diagram of the connection structure between the connecting rod and the gear in the present invention;

[0036] Fig.10 It is a schematic diagram of the connection structure between the support block and the fixing seat in the present invention;

[0037] Fig.11 It is a schematic diagram of the connection structure between the strip opening and the rubber sleeve in the present invention;

[0038] Fig.12 It is a schematic diagram of the connection structure between the support block and the slot in the present invention;

[0039] Fig.13 It is a schematic diagram of the connection structure between the conveying blade and the limiting blade body in the present invention;

[0040] Fig.14 for Fig.10 A magnified view of the structure at center.

[0041] In the figure: 1. Main body of asphalt paving machine;

[0042] 2. Auger body; 201. Cavity; 3. Conveying blade; 4. First limiting blade; 5. Second limiting blade; 6. Third limiting blade; 601. Rotating shaft; 7. Fourth limiting blade; 8. Diversion area; 9. Connecting rod; 10. Strip opening; 11. Support block; 12. Fixed block; 13. Rack; 14. Gear; 15. Servo motor; 16. Fixed rod; 17. Fixed plate; 18. Mounting rod; 19. Fixed seat; 20. Stepper motor; 21. Through slot; 22. Socket; 23. Ball; 24. Slide; 25. Through slot; 26. Strip plate; 27. Rubber sleeve; 28. Bottom plate; 29. ​​Insert rod; 30. Tension spring; 31. Slot; 32. Reset spring; 33. Resistance block; 34. Trapezoidal slot; 35. Chamber; 36. Slot; 37. Limiting blade body. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The present invention provides a technical solution:

[0045] See also Figure 1-Figure 13 As shown, an asphalt spreading device suitable for airport runway paving includes an asphalt paving machine body 1 and an auger body 2 for spreading asphalt, the discharge port on the asphalt paving machine body 1 is arranged corresponding to the midpoint of the auger body 2, including the auger body 2 being equally divided into two parts with the midpoint of its length as the boundary, the two parts are provided with conveying blades 3 with opposite spiral directions, which are used to convey asphalt to both sides of the auger body 2; a limiting blade body 37 is arranged on the auger body 2 and is located at the edge end of the conveying blade 3, the limiting blade body 37 and the conveying blade 3 are arranged with the opposite spiral direction and the same pitch, the starting end of the limiting blade body 37 is against the side wall of the conveying blade 3 to form a limiting area, which is used to limit the asphalt from being thrown out at the end of the auger body 2.

[0046] The two auger bodies 2 are fixedly connected together, and the screw directions of the two auger bodies 2 are opposite. When the asphalt on the asphalt paving machine body 1 falls through the discharge port, it will directly fall to the position where the two auger bodies 2 are connected. The conveying blades 3 of the auger body 2 are driven by the motor or the hydraulic system, and the position where the two auger bodies 2 are connected is taken as the symmetry point. The conveying blades 3 on both sides rotate in opposite directions respectively. In this way, when the asphalt enters the area of ​​the auger body 2, the auger body 2 pushes the asphalt from the middle position to both sides, so that the asphalt is initially distributed in the paving width direction, forming a relatively wide asphalt pile with roughly uniform thickness. Under the push of the conveying blades 3, the asphalt diffuses to both sides according to a certain rule, providing a material distribution basis for subsequent fine paving and compaction work;

[0047] by Figure 6 From the perspective of Figure 6 The main body 2 of the auger and the conveying blade 3 rotate clockwise. When the asphalt reaches the end of the conveying blade 3 along the conveying blade 3, the limiting blade body 37 will contact the asphalt. Fig.13As can be seen in the figure, the spiral direction of the limiting blade body 37 is opposite to that of the conveying blade 3. Therefore, when the auger body 2 rotates, the conveying blade 3 generates a leftward thrust on the asphalt, while the limiting blade body 37 generates a rightward thrust on the asphalt. The limiting blade body 37 generates a thrust in the opposite direction to the conveying blade 3, which can effectively prevent the asphalt from being thrown outward at the end of the auger body 2 and the conveying blade 3. Fig.13 From the perspective of FIG, the three conveying blades move the asphalt to the left, and the limiting blade body 37 pushes the asphalt back to the right, which is like setting a "buffer zone" at the end to limit the asphalt within the desired paving range, effectively preventing the asphalt from being thrown out of the edge at will;

[0048] Since the starting end of the limiting blade body 37 is against the side wall of the conveying blade 3, the limiting blade body 37 and the conveying blade 3 form a limiting area. After the asphalt reaches the limiting area, when the limiting area rotates downward, the asphalt will fall downward instead of being thrown to a position outside the paving range.

[0049] See also Figure 2-Figure 7 The limiting blade body 37 includes a first limiting blade 4, which is rotatably arranged on the auger body 2, and its outer wall is against the edge end of the conveying blade 3, and a variable diversion area 8 is formed between the edge end surface of the conveying blade 3; a third limiting blade 6, which is arranged in an inclined shape, one end of which is against the conveying blade 3, and the other end is away from the conveying blade 3, the third limiting blade 6 is rotatably connected to the auger body 2 through a rotating shaft 601, and is located at the entrance of the diversion area 8, and is used to open or close the entrance of the diversion area 8 when swinging left and right; a fourth limiting blade 7, which is fixed on the auger body 2 and is located between the first limiting blade 4 and the third limiting blade 6, an end of the fourth limiting blade 7 away from the third limiting blade 6 is located on the side of the first limiting blade 4 away from the conveying blade 3, and an end of the fourth limiting blade 7 away from the first limiting blade 4 extends to the side of the third limiting blade 6 corresponding to the conveying blade 3, and protrudes from the edge end of the third limiting blade 6 that is not in contact with the conveying blade 3, and is used to guide asphalt from the first limiting blade 4 to the third limiting blade 6;

[0050] One end of the third limiting blade 6 is located on a side of the fourth limiting blade 7 away from the conveying blade 3 and abuts against an outer wall of the fourth limiting blade 7;

[0051] One end of the rotating shaft 601 is rotatably connected to the outer wall of the auger body 2 , and the other end is fixedly connected to the outer wall of the third limiting blade 6 .

[0052] by Figure 6 From the perspective of Figure 6The main body 2 of the auger and the conveying blade 3 rotate clockwise. When the asphalt reaches the end of the conveying blade 3 along the conveying blade 3, the first limiting blade 4 will first contact the asphalt, and then Figure 3 From the perspective of, after the asphalt reaches the first limiting blade 4, the fourth limiting blade 7 will immediately contact the asphalt. When the auger body 2 rotates, the conveying blade 3 generates a left thrust on the asphalt, while the first limiting blade 4 and the fourth limiting blade 7 generate a right thrust on the asphalt. The first limiting blade 4 and the fourth limiting blade 7 can effectively suppress the phenomenon of asphalt being thrown outward at the end of the auger body 2 and the conveying blade 3 by generating a thrust in the opposite direction to the conveying blade 3. Figure 3 From the perspective of FIG, the conveying blades 3 move the asphalt to the left, and the first limiting blade 4 and the fourth limiting blade 7 push the asphalt back to the right;

[0053] Then as Figure 5 As given in FIG. 1 , when the fourth limiting blade 7 passes over the asphalt, the third limiting blade 6 close to the fourth limiting blade 7 will immediately contact the asphalt. Figure 5 The edge of the third limiting blade 6 abuts against the outer wall of the conveying blade 3, so a limiting area is temporarily formed between the third limiting blade 6 and the conveying blade 3. After the asphalt reaches the limiting area between the third limiting blade 6 and the conveying blade 3, the contact between the third limiting blade 6 and the conveying blade 3 forms an obstruction, so the asphalt can no longer be transported in the direction in which the auger body 2 originally pushed to both sides.

[0054] by Figure 5 From the perspective of FIG, when the edge of the top of the third limiting blade 6 contacts the conveying blade 3, the other end of the third limiting blade 6, that is, the end close to the fourth limiting blade 7, is not in contact with the fourth limiting blade 7, and a distance is left between the third limiting blade 6 and the fourth limiting blade 7. Then, when the third limiting blade 6 is rotated, the third limiting blade 6 will rotate along the auger body 2 through the rotating shaft 601. After the rotating shaft 601 rotates, the end of the third limiting blade 6 that contacts the conveying blade 3 will swing to the right, and the end of the third limiting blade 6 close to the fourth limiting blade 7 will swing to the left. When the edge of the top of the third limiting blade 6 is no longer in contact with the conveying blade 3, the obstruction to the diversion area 8 will be released, so that the diversion area 8 is opened.

[0055] At this time, the end of the third limiting blade 6 that is close to the fourth limiting blade 7 will abut against the fourth limiting blade 7, and then the top of the third limiting blade 6 can no longer continue to swing to the right, and the third limiting blade 6 will stay at Figure 7The third limiting blade 6 is in the position where, as the auger body 2 continues to rotate, the asphalt will enter the diversion area 8 from the original triangular angle area. Since part of the first limiting blade 4 is also in contact with the conveying blade 3, the asphalt still cannot pass through after contacting the contact part of the first limiting blade 4 and the conveying blade 3. Since the first limiting blade 4 is also opposite to the spiral direction of the conveying blade 3, the first limiting blade 4 can also effectively suppress the force of the asphalt being thrown out. Similarly, when the diversion area 8 rotates downward with the auger body 2, the asphalt will also fall due to gravity.

[0056] The first limiting blade 4 can rotate like the third limiting blade 6. The rotation point of the first limiting blade 4 is located at one end of the edge of the conveying blade 3. Figure 3 From the perspective of FIG. 1 , part of the first limiting blade 4 does not contact the conveying blade 3 and does not correspond to the conveying blade 3, and the other part corresponds to the conveying blade 3. Therefore, a split flow area 8 is formed between the part of the first limiting blade 4 corresponding to the conveying blade 3 and the conveying blade 3. Then, Figure 5 From the perspective of, when the first limiting blade 4 rotates, the portion of the first limiting blade 4 corresponding to the conveying blade 3 will be away from the conveying blade 3 or close to the conveying blade 3, when the portion of the first limiting blade 4 corresponding to the conveying blade 3 is close to the conveying blade 3, the diversion area 8 will be reduced, and when the portion of the first limiting blade 4 corresponding to the conveying blade 3 is away from the conveying blade 3, the diversion area 8 will be expanded;

[0057] When the diversion area 8 becomes smaller, the width of the falling asphalt will become narrower. Since the asphalt falls in a narrower space, the thickness of its accumulation will increase accordingly when the flow rate is relatively stable. This is useful in some cases where the paving thickness needs to be finely adjusted or the local area needs to be thickened. For example, at the edge of the road or in small potholes that need to be repaired, by making the asphalt accumulate more concentratedly, these areas can be better filled to ensure the flatness and structural integrity of the road surface, such as near the curb or where the road meets other facilities such as drainage facilities, guardrail bases, etc. It is also very beneficial for the fine treatment of the edge of the road, such as near the curb or where the road meets other facilities such as drainage facilities, guardrail bases, etc., it is necessary to accurately lay asphalt to prevent excessive diffusion of asphalt and encroachment on other areas. This ensures that the edge of the road is neat and regular, and the transition between adjacent facilities is more natural;

[0058] When the diversion area 8 becomes wider, it can cover a wider range in one paving process and better control the shape and quality of the edge. At the joints between the new and old pavements, by gradually adjusting the asphalt paving width, the new asphalt can be better integrated with the old pavement, thereby improving the integrity and quality of the pavement.

[0059] See also Figure 2-Figure 11 The auger body 2 is provided with a cavity 201, and a reciprocating and rotatable mounting rod 18 is connected to the auger body 2. A second limiting blade 5 is fixedly mounted on the outer wall of the mounting rod 18, and the second limiting blade 5 is located on one side of the third limiting blade 6; a driving member for driving the mounting rod 18 to move and drive the first limiting blade 4 to rotate, and a driving part for driving the mounting rod 18 to rotate are arranged in the cavity 201; the driving member at least includes a rotatable connecting rod 9, one end of which is connected to the first limiting blade 4, and the other end is inserted through the auger body 2 and extends into the cavity 201 and is connected to a gear assembly, which is used for when the connecting rod 9 rotates, the mounting rod 18 is driven by the gear assembly to move together with the driving part.

[0060] The driving part drives the mounting rod 18 to rotate, thereby enabling the second limiting blade 5 to rotate. Figure 5 From the perspective of FIG, when the bottom of the second limiting blade 5 abuts against the third limiting blade 6, the third limiting blade 6 is in contact with the conveying blade 3, and the third limiting blade 6 will not rotate due to the impact of the asphalt, because the second limiting blade 5 abuts against the third limiting blade 6. When the third limiting blade 6 needs to open the diversion area 8, the connecting rod 9 is first driven to rotate, and the connecting rod 9 serves as the rotation point of the first limiting blade 4. Therefore, the rotation of the connecting rod 9 will drive the first limiting blade 4 to rotate;

[0061] Since the first limiting blade 4 is in an arc shape, the inner arc of the first limiting blade 4 corresponds to the auger body 2, and one end of the connecting rod 9 extending to the outside of the auger body 2 is fixedly connected to the inner arc wall of the first limiting blade 4, and the other end of the connecting rod 9 is inserted into the auger body 2 and extends into the cavity 201. The connecting rod 9 is rotatably connected to the auger body 2. When the connecting rod 9 rotates, it drives the gear assembly to operate. The operating gear assembly will drive the driving part and the mounting rod 18 to move together, and then drive the second limiting blade 5 to move through the mounting rod 18, so as to Figure 5 From the perspective of , the second limiting blade 5 is moved in a direction away from the third limiting blade 6;

[0062] The driving part is used to drive the mounting rod 18 and the second position-limiting blade 5 to rotate when the driving part moves together with the mounting rod 18 and the second position-limiting blade 5 .

[0063] See also Figure 8-Figure 14 The driving part includes a stepper motor 20 arranged in the cavity 201. A laterally movable fixed seat 19 is arranged in the cavity 201. The fixed seat 19 is provided with a socket 22. One end of the mounting rod 18 located in the cavity 201 is inserted into the socket 22 and fixedly connected with the driving end of the stepper motor 20. The inner wall of the socket 22 abuts against the outer wall of the mounting rod 18, and the stepper motor 20 is fixedly mounted on the outer wall of the fixed seat 19.

[0064] The stepper motor 20 is used to drive the mounting rod 18 to rotate. The running gear assembly directly drives the fixing seat 19 to move, and then drives the mounting rod 18 and the stepper motor 20 to move together through the moving fixing seat 19. The socket 22 provides a space for the mounting rod 18 to be inserted, and connects the mounting rod 18 to the fixing seat 19, so that the fixing seat 19 can drive the mounting rod 18 when it moves. The stepper motor 20 is fixed to the outer wall of the fixing seat 19 by multiple bolts, thereby ensuring the stability of the stepper motor 20.

[0065] See also Fig. 9 The gear assembly includes a gear 14 fixedly mounted on the outer wall of the connecting rod 9, and a rack 13 meshingly connected to the gear 14. A fixing rod 16 is fixedly mounted on the inner wall of the cavity 201. The fixing rod 16 is rectangular. The rack 13 is slidably connected to the outer wall of the fixing rod 16. A through groove 21 is formed in the fixing seat 19. A fixing plate 17 is fixedly mounted on the outer wall of the rack 13. One end of the fixing plate 17 away from the rack 13 extends into the through groove 21 and abuts against the inner wall of the through groove 21.

[0066] The gear 14 is fixedly connected to the connecting rod 9, and the fixing rod 16 is fixed to the inner wall of the cavity 201, so the rack 13 is sleeved on the fixing rod 16 and will not fall off easily. At the same time, since the fixing rod 16 is rectangular, the rack 13 can be kept as Fig. 9 The tilt angle in the middle will not rotate along the fixed rod 16, so that the rack 13 can maintain a meshing connection with the gear 14. When the connecting rod 9 rotates, the gear 14 will rotate together, and the rotating gear 14 will drive the rack 13 to move. Fig. 9 The initial state is shown in FIG. 1 , where the second limiting blade 5 is still in contact with the third limiting blade 6. Fig. 9 From the perspective of , when the gear 14 and the connecting rod 9 rotate counterclockwise, the rack 13 will move to the left along the fixing rod 16. When the rack 13 moves to the left, it drives the fixing plate 17 to move together. When the fixing plate 17 moves, its outer wall will conflict with the inner wall of the through groove 21, and then push the fixing seat 19 to move together, thereby causing the mounting rod 18 and the second limiting blade 5 to move to the left together, so that the second limiting blade 5 is away from the third limiting blade 6.

[0067] See also Figure 8-Figure 9 The driving component also includes a servo motor 15 arranged in the cavity 201, the driving end of the servo motor 15 is fixedly connected to one end of the connecting rod 9 located in the cavity 201, the outer wall of the connecting rod 9 is rotatably connected to the auger body 2, and a fixed block 12 is fixedly installed on the inner wall of the cavity 201, and the servo motor 15 is fixedly installed on the outer wall of the fixed block 12.

[0068] The servo motor 15 is used to drive the connecting rod 9 to rotate. The fixed block 12 is fixedly installed on the inner wall of the cavity 201. The servo motor 15 is fixed to the outer wall of the fixed block 12 by multiple bolts, which ensures the stability of the servo motor 15. The fixed connection and fixed installation methods in this article can be fixed together by threaded connection or welding.

[0069] See also Figure 8-Figure 9 The inner wall of the cavity 201 is fixedly mounted with a support block 11 , and the outer wall of the support block 11 is provided with two slide grooves 24 . The outer wall of the fixed seat 19 is rotatably connected with two sets of balls 23 , and the balls 23 are slidably buckled inside the slide grooves 24 .

[0070] The support block 11 is fixed on the inner wall of the cavity 201, supporting the fixed seat 19 so that the fixed seat 19 can move along the outer wall of the support block 11 when moving. The slide groove 24 provides a guide for the movement of the fixed seat 19, and the fixed seat 19 slides along the slide groove 24 through two rows of balls 23, which not only ensures that the fixed seat 19 will not easily fall off the support block 11, but also makes the movement of the fixed seat 19 smoother.

[0071] See also Figure 9-14 A chamber 35 is provided inside the fixing seat 19, and a strip plate 26 is provided inside the chamber 35 and can move along the long axis direction of the chamber 35, and the outer wall of the strip plate 26 abuts against the inner wall of the chamber 35, and the strip plate 26 has a trapezoidal groove 34, and the fixing seat 19 has a slot 36, one end of the slot 36 is connected to the through groove 21, and the other end is connected to the trapezoidal groove 34;

[0072] A resistance block 33 is fixedly installed on the side wall of the fixed plate 17 located in the through groove 21, and the end of the resistance block 33 away from the fixed plate 17 extends through the slot 36 to the inside of the trapezoidal groove 34, and the resistance block 33 and the trapezoidal groove 34 are both integrally formed with inclined surfaces, and the inclined surface of the resistance block 33 is against the inclined surface of the trapezoidal groove 34, and a return spring 32 is fixedly connected between one end of the strip plate 26 and the inner wall of the chamber 35, and the support block 11 is provided with a slot 31, and the end of the strip plate 26 away from the return spring 32 is inserted into the slot 31, and the side length of the slot 31 is the same as the side length of the strip plate 26, and the fixed seat 19 is provided with a through opening 25, and the through opening 25 is connected to the inside of the chamber 35, and the through opening 25 corresponds horizontally to the resistance block 33.

[0073] When the fixing plate 17 moves, the abutment block 33 is driven to be inserted into the trapezoidal groove 34. When the abutment block 33 moves, it moves along the slot 36. The inclined surface of the abutment block 33 abuts against the inclined surface of the trapezoidal groove 34 at the beginning. Fig.13From the perspective of FIG, as the abutment block 33 moves to the left, the abutment block 33 will push the strip plate 26 upward, so that the strip plate 26 moves upward and squeezes the return spring 32. The strip plate 26 will slide along the chamber 35 when it moves. In the initial state, the end of the strip plate 26 away from the return spring 32 is inserted into the slot 31. When the strip plate 26 moves upward, the strip plate 26 will move out of the slot 31. At this time, the fixing plate 17 can drive the fixing seat 19 to move, so as to prevent the second limiting blade 5 from being easily moved when the asphalt impacts the third limiting blade 6.

[0074] like Figure 5 From the perspective of FIG. 1 , the initial position of the second limiting blade 5 is against the third limiting blade 6, and at this time, the mounting rod 18 and the fixing seat 19 are in Fig. 9 Therefore, only in the initial state at this time, the strip plate 26 will be inserted into the slot 31. After the fixed seat 19 moves, even if the abutment block 33 no longer abuts the strip plate 26, the strip plate 26 will only contact the support block 11 after it moves back to its original position due to the elastic force of the return spring 32, and will not affect the movement of the fixed seat 19.

[0075] The through opening 25 provides space for the resistance block 33 to move. When the resistance block 33 lifts the strip plate 26, the end of the resistance block 33 away from the fixed plate 17 will be inserted into the through opening 25 and move out of the chamber 35 through the through opening 25, so that the horizontal side of the resistance block 33 can contact the inclined surface of the trapezoidal groove 34 and smoothly push the strip plate 26.

[0076] See also Figure 8-Figure 14 The auger body 2 is provided with a strip opening 10, the cavity 201 is connected with the strip opening 10, one end of the mounting rod 18 passes through the strip opening 10 and extends to the inside of the cavity 201, and the other end passes through the strip opening 10 and extends to the outside of the auger body 2, and the mounting rod 18 reciprocates along the long axis direction of the strip opening 10;

[0077] Two rubber sleeves 27 are fixedly installed on the inner wall of the strip opening 10. The two rubber sleeves 27 are butted against each other at one side away from the strip opening 10. The inner wall of the rubber sleeve 27 is connected to a bottom plate 28. A tension spring 30 is fixedly connected between one end of the bottom plate 28 and the inner wall of the strip opening 10. An insertion rod 29 is fixedly installed at one end of the bottom plate 28. The end of the insertion rod 29 away from the bottom plate 28 is inserted into the auger body 2.

[0078] The first limiting blade 4 is fixedly connected to the outer wall of the connecting rod 9, the inner diameters of the first limiting blade 4, the third limiting blade 6 and the fourth limiting blade 7 correspond to the auger body 2, and are close to the auger body 2, and there is a swingable distance between them and the auger body 2, the second limiting blade 5 is fixedly connected to the outer wall of the mounting rod 18, and the support block 11 is positioned close to the strip opening 10.

[0079] The mounting rod 18 can move along the strip opening 10. In order to prevent asphalt from entering the cavity 201 through the strip opening 10, the bottom plate 28 is squeezed by the tension spring 30 so that the two rubber sleeves 27 are abutted against each other. When the mounting rod 18 moves along between the two rubber sleeves 27, the tension spring 30 is squeezed, and the tension spring 30 is contracted so that the mounting rod 18 can move.

[0080] When the mounting rod 18 passes over part of the tension spring 30, the tension spring 30 behind the mounting rod 18 will re-extrude the bottom plate 28, and through the bottom plate 28, the rubber sleeve 27 is squeezed so that the two rubber sleeves 27 are again against each other, thereby achieving the shielding of the strip opening 10. The rubber sleeve 27 is made of hard rubber, so the rubber sleeve 27 can be deformed when the tension spring 30 contracts. The material of the side where the two rubber sleeves 27 are against each other is relatively hard, so when the mounting rod 18 moves, it will not be blocked by the bottom plate 28. When the tension spring 30 contracts, the insertion rod 29 will be inserted into the auger body 2, so that the tension spring 30 can only contract up and down, and the tension spring 30 is prevented from easily tilting left and right.

[0081] The inner diameters of the first limiting blade 4, the third limiting blade 6 and the fourth limiting blade 7 all correspond to the auger body 2, mainly to fit the shape of the auger body 2 and the conveying blade 3 to avoid leaving too large a gap between the auger body 2. The second limiting blade 5 is fixedly connected to the outer wall of the mounting rod 18 to ensure stability.

[0082] See also Figure 1-Figure 14 The present invention also provides a method, having an asphalt spreading device suitable for airport runway paving according to any of the above-mentioned embodiments, the asphalt paving machine body 1 also includes: asphalt is usually transported from an asphalt production plant or a storage warehouse to a construction site by a special asphalt transport vehicle, and then unloaded into an asphalt storage tank for storage; according to the construction requirements and the initial temperature of the asphalt, the asphalt is heated to a suitable paving temperature by a heating device of the storage tank or a special heating device; the pretreated asphalt is extracted from the storage tank by an asphalt pump and transported to the asphalt paving machine body 1 through a delivery pipeline.

Claims

1. An asphalt spreading device suitable for paving an airport runway, comprising an asphalt paving machine body (1) and an auger body (2) for spreading asphalt, wherein a discharge port on the asphalt paving machine body (1) is arranged corresponding to the midpoint of the auger body (2), and characterized in that: include, The auger body (2) is divided into two parts with the midpoint of its length as the boundary, and the two parts are provided with conveying blades (3) with opposite spiral directions for conveying asphalt to both sides of the auger body (2); The limiting blade body (37) is arranged on the auger body (2) and is located at the edge end of the conveying blade (3). The limiting blade body (37) and the conveying blade (3) have opposite spiral directions and the same spiral pitch. The starting end of the limiting blade body (37) abuts against the side wall of the conveying blade (3) to form a limiting area, which is used to limit the asphalt from being thrown out at the end of the auger body (2).

2. The asphalt spreading device for airport runway paving as claimed in claim 1, characterized in that: The limiting blade body (37) comprises: A first limiting blade (4) is rotatably disposed on the auger body (2), an outer wall of which abuts against the edge end of the conveying blade (3) and forms a variable flow dividing area (8) between the first limiting blade (4) and the edge end surface of the conveying blade (3); The third limiting blade (6) is arranged in an inclined shape, with one end abutting against the conveying blade (3) and the other end away from the conveying blade (3). The third limiting blade (6) is rotatably connected to the auger body (2) via a rotating shaft (601) and is located at the entrance of the diversion area (8). When the third limiting blade (6) swings left and right, it opens or closes the entrance of the diversion area (8); The fourth limiting blade (7) is fixed on the auger body (2) and is located between the first limiting blade (4) and the third limiting blade (6); the end of the fourth limiting blade (7) away from the third limiting blade (6) is located on the side of the first limiting blade (4) away from the conveying blade (3); the end of the fourth limiting blade (7) away from the first limiting blade (4) extends to the side of the third limiting blade (6) corresponding to the conveying blade (3), and protrudes from the edge end of the third limiting blade (6) away from the conveying blade (3), and is used to guide asphalt from the first limiting blade (4) to the third limiting blade (6).

3. The asphalt spreading device for airport runway paving as claimed in claim 2, characterized in that: The auger body (2) is provided with a cavity (201), the auger body (2) is connected to a reciprocating and rotatable mounting rod (18), the outer wall of the mounting rod (18) is provided with a second limiting blade (5), and the second limiting blade (5) is located on one side of the third limiting blade (6); The cavity (201) is provided with a driving member for driving the installation rod (18) to move and the first limiting blade (4) to rotate, and a driving unit for driving the installation rod (18) to rotate; The driving member at least comprises a rotatable connecting rod (9), one end of which is connected to the first limiting blade (4), and the other end of which is inserted through the auger body (2) and extends into the cavity (201) and is connected to a gear assembly, so that when the connecting rod (9) rotates, the gear assembly drives the mounting rod (18) and the driving part to move together.

4. The asphalt spreading device for airport runway paving as claimed in claim 3, characterized in that: The driving unit comprises a stepping motor (20) arranged in a cavity (201); a laterally movable fixing seat (19) is arranged in the cavity (201); a socket (22) is provided on the fixing seat (19); one end of the mounting rod (18) located in the cavity (201) is inserted into the socket (22) and connected to the driving end of the stepping motor (20); the inner wall of the socket (22) abuts against the outer wall of the mounting rod (18); and the stepping motor (20) is mounted on the outer wall of the fixing seat (19).

5. The asphalt spreading device for airport runway paving as claimed in claim 4, characterized in that: The gear assembly comprises a gear (14) mounted on the outer wall of a connecting rod (9), and a rack (13) meshingly connected with the gear (14); a fixing rod (16) is mounted on the inner wall of the cavity (201); the fixing rod (16) is rectangular; the rack (13) is slidably connected to the outer wall of the fixing rod (16); a through groove (21) is formed on the fixing seat (19); a fixing plate (17) is mounted on the outer wall of the rack (13); an end of the fixing plate (17) away from the rack (13) extends into the through groove (21) and abuts against the inner wall of the through groove (21).

6. The asphalt spreading device for airport runway paving as claimed in claim 5, characterized in that: The driving component also includes a servo motor (15) disposed in the cavity (201), wherein a driving end of the servo motor (15) is connected to an end of a connecting rod (9) located in the cavity (201), an outer wall of the connecting rod (9) is rotatably connected to the auger body (2), a fixing block (12) is installed on the inner wall of the cavity (201), and the servo motor (15) is installed on the outer wall of the fixing block (12).

7. The asphalt spreading device for airport runway paving as claimed in claim 6, characterized in that: A support block (11) is installed on the inner wall of the cavity (201), and two slide grooves (24) are provided on the outer wall of the support block (11). Two groups of balls (23) are rotatably connected to the outer wall of the fixing seat (19), and the balls (23) are slidably buckled inside the slide grooves (24).

8. The asphalt spreading device for airport runway paving as claimed in claim 7, characterized in that: The fixing seat (19) has a chamber (35) formed inside, and a strip plate (26) is provided in the chamber (35) and can move along the long axis direction of the chamber (35), the outer wall of the strip plate (26) abuts against the inner wall of the chamber (35), the strip plate (26) has a trapezoidal groove (34), and the fixing seat (19) has a slot (36), one end of the slot (36) is connected to the through groove (21), and the other end is connected to the trapezoidal groove (34); A resisting block (33) is installed on the side wall of the fixed plate (17) located in the through groove (21); one end of the resisting block (33) away from the fixed plate (17) passes through the slot (36) and extends to the inside of the trapezoidal groove (34); the resisting block (33) and the trapezoidal groove (34) are both integrally formed with an inclined surface; the inclined surface of the resisting block (33) abuts against the inclined surface of the trapezoidal groove (34); a return spring (32) is connected between one end of the strip plate (26) and the inner wall of the chamber (35); the support block (11) is provided with a slot (31); one end of the strip plate (26) away from the return spring (32) is inserted into the slot (31); the side length of the slot (31) is the same as the side length of the strip plate (26).

9. The asphalt spreading device for airport runway paving as claimed in claim 8, characterized in that: The auger body (2) is provided with a strip-shaped opening (10), the cavity (201) is in communication with the strip-shaped opening (10), one end of the mounting rod (18) passes through the strip-shaped opening (10) and extends to the inside of the cavity (201), and the other end passes through the strip-shaped opening (10) and extends to the outside of the auger body (2), and the mounting rod (18) reciprocates along the long axis direction of the strip-shaped opening (10); Two rubber sleeves (27) are installed on the inner wall of the strip-shaped opening (10), and the two rubber sleeves (27) are abutted against each other at a side away from the strip-shaped opening (10). The inner wall of the rubber sleeve (27) is connected to a bottom plate (28), and a tension spring (30) is connected between one end of the bottom plate (28) and the inner wall of the strip-shaped opening (10). An insertion rod (29) is installed on one end of the bottom plate (28), and the end of the insertion rod (29) away from the bottom plate (28) is inserted into the auger body (2).

10. A method, characterized in that: An asphalt spreading device suitable for paving an airport runway as described in any one of claims 1 to 9.

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