Asphalt paver with reduced edge segregation

Abstract

The application relates to an asphalt paver capable of reducing edge segregation, belonging to the field of road engineering, which comprises a traveling device and a distributing device, the distributing device comprises a distributing body and a distributing auger, the traveling device moves along a pavement, a distributing groove is arranged on the distributing body, the distributing auger is located in the distributing groove and rotationally connected with the distributing body, the length direction of the distributing groove and the length direction of the distributing auger are both perpendicular to the moving direction of the traveling device, a distributing filter baffle is coaxially fixedly connected on the distributing auger, and a distributing hole is arranged on the distributing filter baffle. The asphalt aggregate is intercepted by the distributing filter baffle, the large-particle aggregate is less likely to flow to the end of the distributing groove than the small-particle aggregate, that is, the large-particle asphalt aggregate is less likely to reach the edge of the pavement, the quantity of the large-particle asphalt aggregate at the side edge position of the pavement is reduced, and the probability of segregation is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of road engineering, in particular to an asphalt paver capable of reducing edge segregation. BACKGROUND

[0002] Asphalt pavement refers to various types of pavements constructed by mixing road asphalt materials into mineral materials. The asphalt binder improves the ability of the paving granules to resist damage to the pavement caused by driving and natural factors, so that the pavement is flat, less dusty, water-tight and durable. Therefore, asphalt pavement is a kind of senior pavement most widely used in road construction. The asphalt concrete is spread and rolled to form the asphalt pavement.

[0003] The asphalt pavement is vibrated and leveled by a paver. In the related art, the paver includes a traveling device, a hopper and a distributing device. The distributing device includes a distributing trough body and a distributing auger. The distributing auger is rotationally connected in the distributing trough body. The length direction of the distributing trough body and the length direction of the distributing auger are both perpendicular to the moving direction of the paver. The asphalt aggregate in the hopper is moved to the middle part of the distributing trough body. The asphalt aggregate is pushed along the length direction of the distributing trough body in the process of rotation of the distributing auger, so that the asphalt aggregate is uniformly distributed in the width direction of the pavement.

[0004] Since the asphalt aggregate particles are coarse and fine, the centrifugal force and inertia generated by the aggregate particles are different under the driving of the rotating distributing auger, so that the coarse aggregate is concentrated and conveyed to the both ends of the distributing trough body, which often causes excessive coarse aggregate on both sides of the pavement water stable layer or surface layer, and further causes segregation phenomenon, thereby affecting the engineering quality. SUMMARY

[0005] In order to improve the above problems, the present application provides an asphalt paver capable of reducing edge segregation.

[0006] The asphalt paver capable of reducing edge segregation provided by the present application adopts the following technical scheme:

[0007] The asphalt paver capable of reducing edge segregation includes a traveling device and a distributing device. The distributing device includes a distributing body and a distributing auger. The traveling device moves along the pavement. The distributing body is provided with a distributing groove. The distributing auger is located in the distributing groove and rotationally connected with the distributing body. The length direction of the distributing groove and the length direction of the distributing auger are both perpendicular to the moving direction of the traveling device. A filter partition plate is coaxially fixedly connected to the distributing auger. The filter partition plate is provided with a distributing hole.

[0008] Through the above technical scheme, the aggregate with small particle size can pass through the filter partition plate through the distributing hole and continue to move to the end of the distributing groove. The aggregate with large particle size is blocked by the filter partition plate and is not easy to flow to the end of the distributing groove in a large amount. The number of the large particle asphalt aggregate at the side of the pavement is reduced, and the probability of segregation phenomenon is reduced.

[0009] Preferably, a pressure separation groove is formed in the groove wall of the distribution groove, and the opening of the pressure separation groove faces the distribution filter partition plate, and the distribution filter partition plate is located within the width of the pressure separation groove in the projection along the direction perpendicular to the length of the distribution screw.

[0010] By using the above technical scheme, the pressure separation groove beside the distribution filter partition plate is used for temporarily accumulating the aggregate intercepted by the distribution filter partition plate, so as to reduce the pressure generated by the aggregate accumulation in front of the distribution filter partition plate.

[0011] Preferably, the side of the distribution filter partition plate facing away from the conveying direction of the distribution screw is a conical surface.

[0012] By using the above technical scheme, the conical surface can form a pushing force guiding the aggregate towards the side in the direction of the incoming aggregate, so as to improve the smoothness of the large-particle aggregate moving to the side.

[0013] Preferably, the distribution screw includes an initial section and an edge section, the edge section is located between the initial section and the end of the distribution groove, the distribution filter partition plate is located between the edge section and the initial section, the diameter of the screw blade of the initial section is greater than the diameter of the screw blade of the edge section, and the width of the distribution groove at the edge section is smaller than the width of the distribution groove at the initial section.

[0014] By using the above technical scheme, since part of the asphalt aggregate is intercepted by the distribution filter partition plate, the amount of aggregate at the edge section is small, the width of the separation groove at the edge section is small, and the space is also small, so that the flow rate of the aggregate does not have a large difference.

[0015] Preferably, the distribution screw further includes a connecting section, the connecting section is located between the initial section and the edge section, universal couplings are connected between the initial section and the connecting section, between the connecting section and the edge section, the distribution filter partition plate is fixedly connected to the connecting section in a coaxial manner, the axis of the initial section and the axis of the edge section are parallel to the length direction of the distribution groove, and the axis of the edge section is lower than the axis of the initial section.

[0016] By using the above technical scheme, the axis of the connecting section is not parallel to the initial section or the edge section, but is inclined downward along the material conveying direction, so that the surface of the distribution filter partition plate fixed to the connecting section is also relatively inclined, and the hole axis of the distribution hole has an angle offset with the overall advancing direction of the aggregate, so that the distribution hole is not easy to be blocked.

[0017] Preferably, a reflux groove is formed in the groove wall of the distribution groove, one end of the reflux groove communicates with the pressure separation groove, the other end of the reflux groove communicates with the distribution groove, and the end of the reflux groove away from the pressure separation groove is located at the side of the initial section.

[0018] Preferably, a return screw conveyor is rotationally connected to the material distributing body and located in the pressure distribution groove, and an axis of the return screw conveyor is inclined away from an end of the pressure distribution groove and toward a direction opposite to a material conveying direction of the material distributing screw conveyor.

[0019] By adopting the above technical solution, the asphalt aggregate entering the pressure distribution groove can move along the return groove under the action of the return screw conveyor, return to the material distribution groove at the initial section, and form a circulating material flow.

[0020] Preferably, a bottom of the pressure distribution groove is higher than a bottom of the material distribution groove, a bottom of the return groove at a communication position with the pressure distribution groove is flush with the bottom of the pressure distribution groove, and a bottom of the return groove at a communication position with the material distribution groove is flush with the bottom of the material distribution groove.

[0021] By adopting the above technical solution, a space from the pressure distribution groove to the material distribution groove through the return groove is a downward slope, and the flow smoothness of the return aggregate is improved.

[0022] Preferably, the return screw conveyor includes a central rod and a plurality of material pushing rods, the central rod is rotationally connected to the material distributing body, the material pushing rods are fixedly connected to the central rod, a length direction of the material pushing rods is a radial direction of the central rod, and the plurality of material pushing rods are spirally arranged around the central rod.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By arranging the filter partition and the pressure distribution groove, the aggregate with a small particle size can pass through the filter partition through the material distribution hole, continue to move to the end of the material distribution groove, and the aggregate with a large particle size is blocked by the filter partition and is not easy to flow to the end of the material distribution groove in a large amount. The pressure distribution groove beside the filter partition temporarily accumulates the aggregate blocked by the filter partition, and reduces the pressure generated by the aggregate accumulation in front of the filter partition.

[0025] 2. By arranging the return groove and the return screw conveyor, the asphalt aggregate entering the pressure distribution groove can move along the return groove under the action of the return screw conveyor, return to the material distribution groove at the initial section, and form a circulating material flow. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of an asphalt paver for reducing edge segregation in an embodiment of the present application.

[0027] Figure 2 is a structural schematic diagram of a material distributing device in an embodiment of the present application.

[0028] Figure 3 is a structural schematic diagram of a material distributing screw conveyor in an embodiment of the present application.

[0029] Explanation of reference signs: 1, traveling device; 12, distributing device; 2, distributing body; 21, distributing groove; 22, pressure distributing groove; 23, backflow groove; 24, backflow auger; 241, center rod; 242, stirring rod; 25, driving motor; 3, distributing auger; 31, initial section; 32, connecting section; 33, edge section; 34, filter partition; 341, distributing hole. DETAILED DESCRIPTION

[0030] The following description will be made in conjunction with the accompanying drawings. Figures 1-3 The present application is further described in detail.

[0031] The present application discloses an asphalt paver capable of reducing edge segregation, as shown in Figure 1 and 2 The paver comprises a traveling device 1 and a distributing device 12, the traveling device 1 is configured to move along a road surface, and the distributing device 12 is located on the side opposite to the traveling direction of the traveling device 1. The distributing device 12 comprises a distributing body 2 and a distributing auger 3, the distributing body 2 is fixedly connected to the traveling device 1, the distributing body 2 is provided with a distributing groove 21, and the distributing auger 3 is located in the distributing groove 21 and is rotatably connected to the distributing body 2. The length direction of the distributing groove 21 and the length direction of the distributing auger 3 are both perpendicular to the moving direction of the traveling device 1. A driving source (not shown in the figure) is arranged in the middle of the distributing body 2 and is configured to drive the distributing auger 3 to rotate. The rotation of the distributing auger 3 is configured to transport asphalt aggregates located in the middle of the distributing groove 21 to both ends, so that the asphalt aggregates are uniformly distributed in the length direction of the distributing body 2.

[0032] As shown in Figure 2 and 3As shown, from the middle of the distribution chute 21 to one end, the cloth auger 3 includes an initial section 31, a connecting section 32 and an edge section 33 in turn, the edge section 33 is located between the initial section 31 and the end of the distribution chute 21, the edge section 33 is located between the initial section 31 and the end of the distribution chute 21, and the connecting section 32 is located between the initial section 31 and the edge section 33. The axis of the initial section 31 and the axis of the edge section 33 are parallel to the length direction of the distribution chute 21, and the axis of the edge section 33 is lower than the axis of the initial section 31, and universal couplings are connected between the initial section 31 and the connecting section 32, and the connecting section 32 and the edge section 33. The auger blades are fixedly connected on the initial section 31 and the edge section 33, and there are no auger blades on the connecting section 32, the diameter of the auger blades of the initial section 31 is greater than the diameter of the auger blades on the edge section 33, and the width of the distribution chute 21 at the edge section 33 is smaller than the width of the distribution chute 21 at the initial section 31. The cloth auger 3 is coaxially fixedly connected with a distribution filter baffle 34 at the connecting section 32, and in the projection along the axis of the connecting section 32, the surface of the distribution filter baffle 34 is circular. A plurality of distribution holes 341 penetrating the thickness of the distribution filter baffle 34 are formed on the distribution filter baffle 34, and the diameter of the distribution holes 341 is 16mm; during the rotation and feeding of the cloth auger 3, asphalt aggregate with smaller particle size can pass through the distribution filter baffle 34 more smoothly, while asphalt aggregate with larger particle size is not easy to continue to travel due to the interception of the distribution filter baffle 34.

[0033] As shown in Figure 1 and 2 As shown, the slot wall of the distribution chute 21 is provided with a pressure distribution groove 22, the surface of the side of the distribution filter baffle 34 facing the initial section 31 is a conical surface, the slot opening of the pressure distribution groove 22 faces the distribution filter baffle 34, and in the projection perpendicular to the length direction of the cloth auger 3, the distribution filter baffle 34 is located within the width range of the pressure distribution groove 22, and in the process of being pushed by the asphalt aggregate, the aggregate intercepted by the distribution filter baffle 34 can enter the pressure distribution groove 22. The slot wall of the distribution chute 21 is provided with a backflow groove 23, one end of the backflow groove 23 communicates with the pressure distribution groove 22 (the cavity of the backflow groove 23 and the cavity of the pressure distribution groove 22 can be regarded as an integral space), and the other end communicates with the distribution chute 21, and the position where the backflow groove 23 communicates with the distribution chute 21 is located at the side of the initial section 31. The bottom of the pressure distribution groove 22 is higher than the bottom of the distribution chute 21, the bottom of the backflow groove 23 communicating with the pressure distribution groove 22 is flush with the bottom of the pressure distribution groove 22, and the bottom of the backflow groove 23 communicating with the distribution chute 21 is flush with the bottom of the distribution chute 21, that is, the space from the pressure distribution groove 22 to the distribution chute 21 through the backflow groove 23 is a downward slope.

[0034] As shown in Figure 2As shown, the return flow auger 24 is rotationally connected to the material body 2 and located in the pressure distribution groove 22, the return flow auger 24 comprises a central rod 241 and a plurality of material pushing rods 242, the central rod 241 is rotationally connected to the material body 2, each material pushing rod 242 is fixedly connected to the central rod 241, and the length direction of the material pushing rod 242 is the radial direction of the central rod 241, all the material pushing rods 242 are spirally arranged around the central rod 241, the axis of the central rod 241 is inclined away from the end of the material distribution groove 21 and towards the direction opposite to the conveying material direction of the material auger 3, the driving motor 25 for driving the central rod 241 to rotate is fixedly connected to the material body 2 and located outside the material distribution groove 21, the return flow auger 24 can apply a pushing force to the aggregate to make it enter the return flow groove 23 when the return flow auger 24 rotates. Since the main direction of the asphalt aggregate in the material distribution groove 21 is the length direction of the material auger 3, a small amount of large-particle aggregate blocked by the filter partition plate 34 will continue to move with the main flow of aggregate from the slot of the pressure distribution groove 22 to the end of the material distribution groove 21.

[0035] The implementation principle of the asphalt paver for reducing edge segregation according to the embodiment of the application is as follows:

[0036] In the working process, the continuous rotation of the material auger 3 makes the asphalt aggregate move from the middle of the material distribution groove 21 to the two ends, when the asphalt aggregate moves to the joint section 32, the filter partition plate 34 produces a blocking effect on the asphalt aggregate, and the large-particle aggregate is more difficult to move to the end of the material distribution groove 21 than the small-particle aggregate, so that the purpose of reducing the number of large-particle aggregate at the end of the paver is achieved. The intercepted aggregate returns to the material distribution groove 21 through the return flow groove 23, and this circulation loop reduces the local blocking phenomenon caused by the blocking effect of the filter partition plate 34.

[0037] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. An asphalt paver for reducing edge segregation, comprising a traveling device (1) and a distributing device (12), the distributing device (12) comprising a distributing body (2) and a distributing auger (3), the traveling device (1) moving along a pavement, the distributing body (2) being provided with a distributing slot (21), the distributing auger (3) being located in the distributing slot (21) and being rotatably connected with the distributing body (2), the length direction of the distributing slot (21) and the length direction of the distributing auger (3) being perpendicular to the moving direction of the traveling device (1), characterized in that: The cloth screw conveyor (3) is coaxially fixedly connected with a distribution filter baffle (34), and the distribution filter baffle (34) is provided with a distribution hole (341). The slot wall of the distribution slot (21) is provided with a pressure distribution slot (22), the slot opening of the pressure distribution slot (22) faces the distribution filter baffle (34), and in the projection along the length direction perpendicular to the cloth screw conveyor (3), the distribution filter baffle (34) is located within the width range of the pressure distribution slot (22). The cloth screw conveyor (3) comprises an initial section (31) and an edge section (33), the slot wall of the distribution slot (21) is provided with a reflux slot (23), one end of the reflux slot (23) communicates with the pressure distribution slot (22), the other end of the reflux slot (23) communicates with the distribution slot (21), and the end of the reflux slot (23) away from the pressure distribution slot (22) is located at the side edge of the initial section (31). The cloth body (2) is rotationally connected with a reflux screw conveyor (24) within the pressure distribution slot (22), and the end of the shaft line of the reflux screw conveyor (24) away from the distribution slot (21) is inclined towards the opposite direction of the material conveying direction of the cloth screw conveyor (3). The slot bottom of the pressure distribution slot (22) is higher than the slot bottom of the distribution slot (21), the slot bottom of the reflux slot (23) at the communication position with the pressure distribution slot (22) is flush with the slot bottom of the pressure distribution slot (22), and the slot bottom of the reflux slot (23) at the communication position with the distribution slot (21) is flush with the slot bottom of the distribution slot (21).

2. An asphalt paver with reduced edge segregation as in claim 1, wherein: The plate surface of the distribution filter baffle (34) on the side opposite to the material conveying direction of the cloth screw conveyor (3) is a conical surface.

3. An asphalt paver with reduced edge segregation as in claim 2, wherein: The edge section (33) is located between the initial section (31) and the end of the distribution slot (21), the distribution filter baffle (34) is located between the edge section (33) and the initial section (31), the diameter of the screw blade of the initial section (31) is greater than the diameter of the screw blade of the edge section (33), and the slot width of the distribution slot (21) at the edge section (33) is smaller than the slot width of the distribution slot (21) at the initial section (31).

4. An asphalt paver with reduced edge segregation as in claim 3, wherein: The cloth screw conveyor (3) further comprises a connecting section (32), the connecting section (32) is located between the initial section (31) and the edge section (33), universal couplings are connected between the initial section (31) and the connecting section (32) and between the connecting section (32) and the edge section (33), the distribution filter baffle (34) is coaxially fixedly connected to the connecting section (32), the shaft line of the initial section (31) and the shaft line of the edge section (33) are parallel to the length direction of the distribution slot (21), and the shaft line of the edge section (33) is lower than the shaft line of the initial section (31).

5. An asphalt paver with reduced edge segregation as in claim 1, wherein: The reflux screw conveyor (24) comprises a center rod (241) and a plurality of material pushing rods (242), the center rod (241) is rotationally connected to the cloth body (2), the material pushing rods (242) are fixedly connected to the center rod (241), the length direction of the material pushing rods (242) is the radial direction of the center rod (241), and the plurality of material pushing rods (242) are spirally arranged around the center rod (241).

Images