Prefabricated fiber asphalt pavement paving device

Abstract

The present invention relates to a prefabricated fiber asphalt pavement paving device, comprising a frame with a traveling mechanism capable of traveling forward and backward, the frame comprising a frame body, an asphalt hopper arranged on the frame, a front forming roller and a rear forming roller for extruding and molding asphalt concrete are rotatably mounted on the frame at the lower side of the asphalt hopper, at least one of the front forming roller and the rear forming roller is an active roller driven by a forming roller driving mechanism. The present invention solves the technical problems of long fiber asphalt pavement paving cycle and insufficient compaction in the prior art.

Description

Technical Field

[0001] The invention relates to a prefabricated fiber asphalt pavement paving device in the field of road construction. Background Art

[0002] When paving a road, it is necessary to lay a layer of asphalt pavement on the roadbed. The asphalt pavement 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] In the prior art, most asphalt pavement is laid by spreading asphalt gravel and then using road rollers to roll back and forth to compact the asphalt pavement. This on-site compacted asphalt pavement construction has the following problems: 1. The construction period is long. After the asphalt gravel is laid, the asphalt can only be laid by rolling back and forth with the roller, which will increase the pavement laying period; 2. The compaction of the asphalt pavement cannot be guaranteed. During the process of compacting the asphalt pavement by the roller, whether the asphalt pavement can be compacted is affected by many factors, such as the weight of the pressure equipment, the softness of the foundation, etc. If the compaction of the asphalt pavement cannot be guaranteed, the compression resistance of the asphalt pavement cannot be guaranteed. Summary of the invention

[0004] The object of the present invention is to provide a prefabricated fiber asphalt pavement paving device to solve the technical problems of long fiber asphalt pavement paving period and insufficient compaction degree in the prior art.

[0005] To solve the above technical problems, the technical solutions in the present invention are as follows:

[0006] A prefabricated fiber asphalt pavement paving device includes a frame with a traveling mechanism that can move forward and backward, the frame includes a frame body, an asphalt hopper is arranged on the frame, and a front forming roller and a rear forming roller for extruding asphalt concrete are rotatably mounted on the frame at the lower side of the asphalt hopper, and at least one of the front forming roller and the rear forming roller is an active roller driven by a forming roller driving mechanism.

[0007] A buffer reversing roller for reversing the formed asphalt concrete layer is rotatably mounted on the lower side of the front forming roller and the rear forming roller, and the rotating axis extends in the left and right directions.

[0008] The buffer reversing roller is located on a side biased toward the rear forming roller.

[0009] A heating device for heating the buffer reversing roller is arranged inside the buffer reversing roller.

[0010] The heating device comprises an electric heating rod arranged in the buffer reversing roller, water is filled between the electric heating rod and the inner wall of the buffer reversing roller, and an air release valve is arranged at the end of the buffer reversing roller.

[0011] An asphalt mixing drum which is arranged obliquely with the front lower and the rear higher is arranged on the vehicle frame at the front side of the asphalt hopper. The discharge port of the asphalt mixing drum corresponds to the feed port of the asphalt hopper, and the asphalt mixing drum is driven by a mixing drum driving mechanism.

[0012] The frame also includes a first swing arm that can swing up and down, the hinge axis of the first swing arm extends in the left-right direction, the front end of the first swing arm is hinged to the frame body, the buffer reversing roller is rotatably assembled on the rear end of the first swing arm, and a first return spring that applies an upward force to the first swing arm is arranged between the first swing arm and the frame body.

[0013] The frame also includes a second swing arm which can swing up and down, the front end of the second swing arm is hinged on the frame body, and the rear end of the second swing arm is rotatably equipped with a rolling weight roller for rolling the upper side of the asphalt concrete layer.

[0014] A second return spring for applying a downward force to the second swing arm is arranged between the frame body and the second swing arm.

[0015] The beneficial effects of the present invention are as follows: when in use, the paving device of the present invention advances along the roadbed to be paved, and the asphalt concrete is squeezed by the front forming roller and the rear forming roller to form an asphalt concrete layer with a compaction degree. The asphalt concrete layer is laid on the roadbed after being reversed by the buffer reversing roller. The asphalt concrete is prefabricated by the front forming roller and the rear forming roller to achieve the purpose of paving in one pass. Since the asphalt concrete layer has been compacted by the front forming roller and the rear forming roller, frequent rolling of the roller equipment is no longer required in the subsequent process, thereby improving the paving efficiency. In addition, the asphalt concrete layer is squeezed by the front forming roller and the rear forming roller to have a compaction degree, and the spacing between the front and rear forming rollers determines the compaction degree of the asphalt concrete layer. The compaction degree of the asphalt concrete layer itself is not affected by the density of the roadbed itself, thereby ensuring the compaction degree of the asphalt concrete layer.

[0016] Furthermore, the asphalt concrete layer is laid on the roadbed after passing through the buffer reversing roller. The buffer reversing roller allows the asphalt concrete layer to pass through the reversing roller, so part of the asphalt concrete layer is attached to the buffer reversing roller. This part of the asphalt concrete layer attached to the buffer reversing roller plays a certain buffering role. If the walking speed of the paving device is inconsistent with the extrusion molding speed of the asphalt concrete layer, the length of the asphalt concrete layer attached to the buffer reversing roller can be adaptively changed, thereby avoiding excessive paving tension and causing the asphalt concrete layer to be broken.

[0017] Furthermore, when the paving device travels too slowly, the length of the asphalt concrete that can be formed by the front forming roller and the rear forming roller is too long, and the weight of the asphalt concrete layer pressed on the buffer reversing roller is heavy. The buffer reversing roller will swing downward with the first swing arm, thus ensuring that a longer asphalt concrete layer can be attached to the buffer reversing roller for paving buffering.

[0018] Furthermore, a heating device is provided inside the buffer reversing roller to ensure the temperature of the buffer reversing roller, thereby ensuring the temperature of the asphalt concrete layer in contact with the buffer reversing roller, thereby preventing the asphalt concrete layer from solidifying prematurely and failing to be successfully laid on the roadbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of embodiment 1 of the present invention;

[0020] Figure 2 is a schematic diagram of the state of the buffer reversing roller after it swings downward in Embodiment 1 of the present invention;

[0021] Figure 3 yes Figure 1 A in the enlarged view;

[0022] Figure 4 is a schematic structural diagram of Embodiment 2 of the present invention;

[0023] Figure 5 yes Figure 4 Schematic diagram of the layout of the middle buffer reversing roller and the rolling counterweight roller. DETAILED DESCRIPTION

[0024] Embodiment 1 of a prefabricated fiber asphalt pavement paving device Figures 1 to 3 As shown: it includes a frame 3 with a running mechanism capable of moving forward and backward. The running mechanism in the present invention includes a front running wheel 2 and a rear running wheel, wherein the rear running wheel is an active running wheel driven by an engine power system. An asphalt mixing drum 4 with a low front and a high rear tilted arrangement is arranged on the frame. The asphalt mixing drum is driven by a mixing drum driving mechanism. The asphalt mixing drum and the asphalt mixing drum driving mechanism belong to the prior art and will not be described in detail here. An asphalt hopper 6 is arranged on the frame at the rear side of the asphalt mixing drum. The discharge port of the asphalt mixing drum corresponds to the feed port of the asphalt hopper.

[0025] A front forming roller 5 and a rear forming roller 7 for extruding and molding an asphalt concrete layer are rotatably mounted on the frame at the lower side of the asphalt hopper and have a rotating axis extending in the left-right direction. In the present invention, the front forming roller 5 and the rear forming roller 7 are active rollers driven by a forming roller driving mechanism and can rotate synchronously relative to each other. That is to say, the front forming roller and the rear forming roller form a pair of roller extrusion structures. When the loose asphalt concrete reaches the upper side of the front forming roller and the rear forming roller, the front forming roller and the rear forming roller rotate relatively to extrude the asphalt concrete into an asphalt concrete layer 9 with a certain thickness.

[0026] The frame also has a buffer reversing roller 13 rotatably mounted on the lower side of the front forming roller and the rear forming roller, and the rotating axis extends in the left-right direction for the asphalt concrete after forming to change direction. The buffer reversing roller is a hollow roller made of stainless steel. The buffer reversing roller 13 is located on the side biased to the rear forming roller 7. The frame includes a first swing arm 18 that can swing up and down on the frame body. The hinge axis of the first swing arm 18 extends in the left-right direction. The front end of the first swing arm 18 is hinged on the frame body. The buffer reversing roller 13 is rotatably mounted on the rear end of the first swing arm 18 through the buffer reversing roller rotating shaft 16. A first return spring 17 that applies an upward force to the first swing arm is arranged between the first swing arm 18 and the frame body. In this embodiment, the frame body on the rear side includes a left mounting plate 15 and a right mounting plate that are arranged at intervals on the left and right sides. The front forming roller 5, the rear forming roller 7 and the buffer reversing roller 13 are all located between the left mounting plate and the right mounting plate. The first swing arm 18 and the first return spring 17 are located on the left side of the left mounting plate. The left mounting plate is provided with an arc-shaped long hole 14 for the buffer reversing roller rotating shaft to pass through. The buffer reversing roller rotating shaft can swing up and down in the arc-shaped long hole 14.

[0027] A heating device for heating the buffer reversing roller is provided inside the buffer reversing roller, water is filled between the electric heating rod and the inner wall of the buffer reversing roller, and a deflation valve is provided at the end of the buffer reversing roller. The frame also includes a second swing arm 11 that can swing up and down, the front end of the second swing arm is hinged to the rear end of the frame body, and the rear end of the second swing arm is rotatably equipped with a rolling weight roller 10 for rolling the upper side of the asphalt concrete layer. A second return spring 12 is provided between the frame body and the second swing arm to apply a downward force to the second swing arm.

[0028] The use process of the present invention is as follows: asphalt concrete mixed with basalt fiber is stirred in a mixing drum, and basalt fiber improves the tensile strength of asphalt concrete, which is conducive to the smooth extrusion molding of the asphalt concrete layer. The asphalt concrete after mixing is sent into the asphalt hopper. At this time, the temperature of the asphalt concrete is 120~140℃. The asphalt concrete is extruded into an asphalt concrete layer with a certain thickness by the front forming roller and the rear forming roller. The extrusion forming speed of the front forming roller and the rear forming roller is 1~3m / min. The temperature of the asphalt concrete layer after extrusion forming is 80~100℃. The temperature of the asphalt concrete layer cannot be too low, because if it is too low, it will be fixed and not easy to bend, so it cannot fit well with the asphalt adhesive layer on the roadbed 1. Therefore, in the present invention, there is a water bath heating in the buffer reversing roller to ensure that the temperature of the buffer reversing roller is 80~100℃, thereby ensuring the temperature of the asphalt concrete layer attached to the buffer reversing roller. After the buffer reversing roller is reversed, the asphalt concrete layer is laid on the roadbed with the asphalt adhesive layer. The role of the rolling counterweight roller is to properly roll the asphalt concrete layer to ensure that the prefabricated asphalt concrete layer is tightly attached to the roadbed. The rolling counterweight roller is not used to compact the asphalt concrete layer. In the preferred embodiment, the speed of the pavement paving device should be consistent with the forming speed of the asphalt concrete layer. However, in actual engineering, it is inevitable that the pavement paving device occasionally moves too slowly or too fast. At this time, if the pavement paving device moves too fast, the lower part of the asphalt concrete layer that fits the annular roller will be laid on the roadbed first to avoid breaking the asphalt concrete layer. If the pavement paving device moves too slowly, it means that too many asphalt concrete layers are formed. At this time, more asphalt concrete layers put pressure on the buffer reversing roller, causing the buffer reversing roller to swing backward and downward relative to the rear forming roller, so that more asphalt concrete layers can be attached to the buffer reversing roller to avoid asphalt concrete layer wrinkles. In other embodiments of the present invention: the walking mechanism can also be a passive walking mechanism, for example, the frame of the present invention can be towed by a trailer; the rolling counterweight roller can also be not provided, and the asphalt concrete layer can be rolled by other rolling equipment to ensure that the asphalt concrete layer fits the roadbed, and the role of the rolling equipment is not to compact the asphalt concrete layer.

[0029] Embodiment 2 of a prefabricated fiber asphalt pavement paving device Figures 4 and 5 As shown: Example 2 is different from Example 1 in that the buffer reversing roller 13 cannot float up and down, the buffer reversing roller rotating shaft 16 of the buffer reversing roller 13 is directly assembled on the frame, and the second swing arm 11 on which the rolling counterweight roller 10 is installed is directly rotatably assembled on the buffer reversing roller rotating shaft 16. Figure 5 Item 15 in the middle represents the left mounting plate of the frame body, and item 20 represents the right mounting plate of the frame body.

Claims

1. A prefabricated fiber asphalt pavement paving device, characterized in that: The invention comprises a frame capable of moving forward and backward and having a traveling mechanism, the frame comprising a frame body, an asphalt hopper being arranged on the frame, a front forming roller and a rear forming roller for extruding and molding asphalt concrete being rotatably mounted on the frame at the lower side of the asphalt hopper, at least one of the front forming roller and the rear forming roller being an active roller driven by a forming roller driving mechanism, and a buffer reversing roller having a rotating axis extending in the left-right direction for reversing the asphalt concrete layer after molding being rotatably mounted on the lower side of the front forming roller and the rear forming roller on the frame, the buffer reversing roller being located on the side biased toward the rear forming roller, a heating device for heating the buffer reversing roller being arranged in the buffer reversing roller, the frame further comprising a first swing arm capable of swinging up and down, the hinge axis of the first swing arm extending in the left-right direction, the front end of the first swing arm being hinged on the frame body, the buffer reversing roller being rotatably mounted on the rear end of the first swing arm, and a first return spring for applying an upward force to the first swing arm being arranged between the first swing arm and the frame body.

2. The prefabricated fiber asphalt pavement paving device according to claim 1, characterized in that: The heating device comprises an electric heating rod arranged in the buffer reversing roller, water is filled between the electric heating rod and the inner wall of the buffer reversing roller, and an air release valve is arranged at the end of the buffer reversing roller.

3. The prefabricated fiber asphalt pavement paving device according to claim 1, characterized in that: An asphalt mixing drum which is arranged obliquely with the front lower and the rear higher is arranged on the vehicle frame at the front side of the asphalt hopper. The discharge port of the asphalt mixing drum corresponds to the feed port of the asphalt hopper, and the asphalt mixing drum is driven by a mixing drum driving mechanism.

4. The prefabricated fiber asphalt pavement paving device according to any one of claims 1 to 3, characterized in that: The frame also includes a second swing arm which can swing up and down, the front end of the second swing arm is hinged on the frame body, and the rear end of the second swing arm is rotatably equipped with a rolling weight roller for rolling the upper side of the asphalt concrete layer.

5. The prefabricated fiber asphalt pavement paving device according to claim 4, characterized in that: A second return spring for applying a downward force to the second swing arm is arranged between the frame body and the second swing arm.

Images