Shear-type curved surface slipform paving device

Abstract

The present invention is a shear-type curved surface slipform paving device that solves the problem that traditional pavers cannot pave the transition section between the slope and the dam top road surface. The slipform is composed of a flat plate and a curved plate. The lower edge of the curved plate is flush with the open bottom surface of the hopper. The right side of the flat plate is connected to the lower edge of the vertical wall of the hopper. The slipform and the baffle opposite to the curved plate form a trough-shaped space. The baffle is connected to one side of the hopper. The outer side of the vertical wall of the hopper has a frame composed of columns and crossbeams. The upper part of the hopper has a horizontal shaft connected to the first pulley outside the hopper through a bearing. The first pulley is transmission-connected to the second pulley on the output shaft of the three-in-one motor. The horizontal shaft is fixedly connected to one end of a crank in the hopper. The other end of the crank is hinged to the upper end of a connecting rod. The lower end of the connecting rod is hinged to a loose-leaf tamping mechanism.

Description

Technical Field

[0001] The invention relates to an asphalt material spreading device for an asphalt concrete panel slope section. Background Art

[0002] After the asphalt paving of the asphalt concrete slab slope section of the pumped storage power station dam is completed, there will be a transition section between the slope and the dam top road surface. This transition section is generally composed of "slope - arc surface - horizontal surface" and its cross section is "slope segment - arc line - horizontal line". Traditional pavers cannot pave this section. Currently, manual paving and vibration rolling are used to form the surface. The shortcomings of manual paving are: (1) the efficiency of manual paving and vibration forming is low, and the arc of the transition section is irregular and has a poor appearance; (2) the internal compaction of the paving layer is low and the density is uneven, so the paving quality cannot be guaranteed. Summary of the Invention

[0003] The purpose of the present invention is to provide a shear-type curved surface slipform paving device with a simple structure, suitable for paving construction of asphalt materials with poor fluidity, high construction efficiency, high internal compaction of the paving layer, uniform density, and high paving quality.

[0004] The present invention is achieved in that:

[0005] The shear-type curved surface slipform paving device consists of a hopper, a tamping mechanism, and a slipform. The slipform 9 is composed of a flat plate and an arc panel. The lower side of the arc panel is flush with the open bottom surface of the hopper 4, and the right side of the flat plate is connected to the lower side of the vertical wall of the hopper. The slipform 9 and the baffle 12 opposite to its arc panel form a trough-shaped space. The baffle 12 is connected to one side of the hopper. The maximum width of the trough-shaped space is less than or equal to the length of the lower side of the vertical wall of the hopper 4. There is a frame composed of columns 11 and beams 13 on the outside of the vertical wall of the hopper 4. There is a three-in-one motor 1 on the frame. There is a horizontal axis on the upper part of the hopper 4 that is connected to the first pulley 2 outside the hopper through a bearing. The first pulley 2 is drivingly connected to the second pulley on the output shaft of the three-in-one motor 1. The horizontal axis is fixedly connected to one end of the crank 3 in the hopper. The other end of the crank 3 is hinged to the upper end of the connecting rod 6. The lower end of the connecting rod 6 is hinged to the loose-leaf tamping mechanism 7. The sliding mold 9 is welded or bolted to the frame and the hopper 4. The material of the sliding mold 9 is low-alloy high-strength steel, such as Q355.

[0006] One side of the flat plate of the sliding mold 9 has a blade 8 located in the hopper 4. The blade 8 is triangular in shape and can be made of medium carbon steel. After the blade 8 is worn, it can be welded.

[0007] The height of the baffle 12 is 200 mm.

[0008] An ultrasonic vibrator is installed on the outside of the flat plate of the slipform 9 to increase the compaction of the paving layer.

[0009] An electric heating device or LPG heater is installed outside the hopper 4. When the temperature of each joint surface is detected to be lower than 90°, the heating temperature should be controlled between 100 and 130°C. When heating the construction joints, the heating depth must be ensured to be no less than 7cm.

[0010] Asphalt concrete enters the hopper through the distributor 5, which can make the feeding uniform. The distributor 5 is a grid structure, and the size of its grid holes is opposite to the normal distribution. There are grid leaves 14 in the distributor frame 15. The distribution of the grid leaves is dense in the middle and sparse on both sides. The closer to the side of the distributor frame 15, the larger the distance between the grid leaves. This can promote the uniform pouring of asphalt concrete into the hopper, which is beneficial to the compaction of the tamping mechanism.

[0011] The advantages of the present invention are as follows:

[0012] (1) The present invention is installed on a multifunctional tractor to make up for the shortcomings of the paver and complete the asphalt-soil mixture paving of the transition section.

[0013] (2) Reduce labor intensity. The asphalt concrete paving of the transition section of the dam surface is completed by the equipment, which changes the current manual paving method and reduces labor intensity.

[0014] (3) The paving device of the present invention ensures the quality of the asphalt concrete paving layer. The paving process of the equipment is continuous and uninterrupted, the internal compaction degree of the paving layer is high, the density is uniform, the appearance is regular, and the finish is high, which greatly improves the internal and external quality of the paving layer.

[0015] (4) This device can be used with the paver to pave the entire transition section at a time, and the operation method is flexible.

[0016] (5) The present invention has a wide range of applications and is easy to install. The shape of the sliding mold can be manufactured according to requirements, and can be a circular arc surface, a hyperbolic surface, a paraboloid, and a curb structure. The present invention can be installed on a tractor or other machinery with a walking function. It can be bolted or welded during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention.

[0018] Figure 2 for Figure 1 A-direction view.

[0019] Figure 3 Schematic diagram of the feeding process of the present invention.

[0020] Figure 4 Schematic diagram of the compaction process of the present invention.

[0021] Figure 5 This is a diagram of the blade structure on one side of the flat plate of the sliding mold 9.

[0022] Figure 6 This is the structural diagram of the material distributor. Shearing type curved surface slipform paving device DETAILED DESCRIPTION

[0023] The shear-type curved surface slipform paving device consists of a hopper, a tamping mechanism, and a slipform. The slipform 9 is composed of a flat plate and an arc panel. The lower side of the arc panel is flush with the open bottom surface of the hopper 4, and the right side of the flat plate is connected to the lower side of the vertical wall of the hopper. The slipform 9 and the baffle 12 opposite to its arc panel form a trough-shaped space. The baffle 12 is connected to one side of the hopper. The maximum width of the trough-shaped space is less than or equal to the length of the lower side of the vertical wall of the hopper 4. There is a frame composed of columns 11 and beams 13 on the outside of the vertical wall of the hopper 4. There is a three-in-one motor 1 on the frame. There is a horizontal axis on the upper part of the hopper 4 that is connected to the first pulley 2 outside the hopper through a bearing. The first pulley is drivingly connected to the second pulley on the output shaft of the three-in-one motor 1. The horizontal axis is fixedly connected to one end of the crank 3 in the hopper. The other end of the crank 3 is hinged to the upper end of the connecting rod 6. The lower end of the connecting rod 6 is hinged to the loose-leaf tamping mechanism 7. The sliding mold 9 is welded or bolted to the frame and the hopper 4. The material of the sliding mold 9 is low-alloy high-strength steel, such as Q355.

[0024] One side of the flat plate of the sliding mold 9 has a blade 8 located in the hopper 4. The blade 8 is triangular in shape and can be made of medium carbon steel. After the blade 8 is worn, it can be welded.

[0025] The height of the baffle 12 is 200 mm.

[0026] An ultrasonic vibrator is installed on the outside of the flat plate of the slipform 9 to increase the compaction of the paving layer.

[0027] An electric heating device or LPG heater is installed outside the hopper 4. When the temperature of each joint surface is detected to be lower than 90°, the heating temperature should be controlled between 100 and 130°C. When heating the construction joints, the heating depth must be ensured to be no less than 7cm.

[0028] Asphalt concrete enters the hopper through the distributor 5, which can make the feeding uniform. The distributor 5 is a grid structure, and the size of its grid holes is opposite to the normal distribution. There are grid leaves 14 in the distributor frame 15. The distribution of the grid leaves is dense in the middle and sparse on both sides. The closer to the side of the distributor frame 15, the larger the distance between the grid leaves. This can promote the uniform pouring of asphalt concrete into the hopper, which is beneficial to the compaction of the tamping mechanism.

[0029] The three-in-one motor 1, with its own brake and reducer, is compact, lightweight, and easy to install. The sliding blade 8, a sharp angle machined into the front end of the sliding form, facilitates the sliding formwork in cutting asphalt concrete, improving shear efficiency and reducing drag. A pulley 3, located outside the hopper, rotates a coaxial crank, which in turn drives the connecting rod in reciprocating motion. Asphalt concrete 10, which is not part of the equipment but is the material being processed, will be explained in detail in the principle section.

[0030] Baffle 12 prevents asphalt concrete from overflowing. It forms a trough with the slipform 9, creating a path for the asphalt concrete to slide from the hopper to the slipform. The tractor is positioned at a fixed height, and the slipform assembly is positioned to ensure that the horizontal section of the slipform 9 is 200mm above the ground. This height determines the desired paving thickness of the transition asphalt concrete.

[0031] The working principle of the present invention is as follows:

[0032] 1. Transition Section Paving Process

[0033] After the asphalt concrete is unloaded into the hopper of the device of the present invention, the crank connecting rod compacting mechanism and the tractor traveling mechanism are started to spread the asphalt material in the hopper on the transition section. The compacting speed of the asphalt concrete is not lower than the traveling speed of the tractor, but cannot exceed it too much.

[0034] Second, shearing method. Figure 2 、 Figure 3 As shown in the figure, the asphalt concrete forming process goes through three processes: feeding process, compaction process and shear forming process.

[0035] (1) Feeding process. The rotating hopper or other hopper feeds the asphalt concrete into the hopper 4 of the present invention. The asphalt concrete enters the hopper through the distributor 5 to ensure uniform feeding. The distributor 5 is a grid structure, and the size of its grid holes is arranged opposite to the normal distribution. The crank 3 rotates 180 degrees to drive the connecting rod 6 to lift the loose-leaf tamping mechanism 7 upward. The two loose-leafs move upward and also move relative to each other, and the angle between them becomes smaller (the minimum value is 30 degrees). The space between the loose-leaf tamping mechanism 7 and the hopper 4 increases, and the asphalt concrete smoothly enters the bottom of the hopper 4 and the baffle 12 and the sliding form 9 to form a groove-shaped space ( Figure 2 The back of the asphalt concrete 10 in the hopper is limited by the hopper 4, and the front is limited by the asphalt concrete 10 that has been paved and formed).

[0036] (2) Compaction process. The crank 3 continues to rotate from 180° to 360° (0°), and the connecting rod 6 drives the loose-leaf tamping mechanism 7 to move downward. Under the action of friction with the mixed green concrete, the loose-leaf tamping mechanism opens (the maximum angle is 180°), forming a tamping plate, which compacts the asphalt concrete in the hopper and baffle 12. The asphalt concrete in the slipform 9 is the paving layer cut and formed by the slipform blade 8, which is the compacted paving material.

[0037] (3) Shearing process. The lower surface of the compacted asphalt concrete is bonded to the paving base surface, and the upper surface is the inner plane of the hopper. Start the equipment walking mechanism (the direction of movement of the walking mechanism is Figure 1 (Axis A) Sliding blade 8 cuts through the compacted paving material "embryo," transforming the material in the hopper into a curved and flat surface identical to the slipform panel (the end face of baffle 12 is flat). This device has the advantage of eliminating the material distribution and vibrating mechanisms, simplifying the equipment and making it ideal for paving materials with poor fluidity.

[0038] Before starting to pave a new section following a cold joint, use a heater to heat the edge (transverse joint) of the paved section and ensure that the temperature is above 100°C at a depth of at least 10mm.

[0039] Use a vibratory roller to compact both the paved and newly paved sections, ensuring a minimum coverage width of 10 cm. Ensure the temperature 7 cm below the joint surface is above 60°C. During compaction, the lower side of the asphalt concrete adheres to the already paved asphalt concrete (heating is required if the temperature is below 90°C), and the rear side adheres to the already paved transition section (heating is required if the temperature is below 90°C). The upper side is formed vertically by the baffle 12, and the front side, forming the interface with the next transition section, is formed vertically by the hopper sidewall.

[0040] 1. Use ultrasonic vibrators. Ultrasonic vibrators can be installed on the outside of the slipform panel to increase the compaction of the paving layer and ensure a high degree of smoothness on the slipform surface without increasing walking resistance.

[0041] 2. Install an electric heating device or LPG heater outside the hopper. When the temperature of each joint surface is detected to be lower than 90°, the heating temperature should be controlled between 100 and 130°C. When heating the construction joints, the heating depth must be ensured to be no less than 7cm.

[0042] 3. The pulley can be replaced by a magnetic coupling.

Claims

1. Shearing type curved surface slipform paving device, characterized in that: The invention is composed of a hopper, a tamping mechanism, and a sliding mold. The sliding mold (9) is composed of a flat plate and an arc plate. The lower side of the arc plate is flush with the open bottom surface of the hopper (4). The right side of the flat plate is connected to the lower side of the vertical wall of the hopper. The sliding mold and the baffle (12) opposite to the arc plate form a groove-shaped space. The baffle is connected to one side of the hopper. The maximum width of the groove-shaped space is less than or equal to the length of the lower side of the vertical wall of the hopper. The outer side of the vertical wall of the hopper has a frame composed of a column (11) and a crossbeam (13). A three-in-one motor (1) is arranged on the frame. The upper part of the hopper has a horizontal shaft connected to the first pulley (2) outside the hopper through a bearing. The first belt The wheel is connected to the second pulley on the output shaft of the three-in-one motor (1) by transmission, the horizontal axis is fixedly connected to one end of the crank (3) in the hopper, the other end of the crank is hinged to the upper end of the connecting rod (6), the lower end of the connecting rod is hinged to the loose-leaf tamping mechanism (7), the sliding form (9) is welded or bolted to the frame and the hopper, the material of the sliding form is low alloy high strength steel, one side of the flat plate of the sliding form (9) has a blade (8) located in the hopper (4), the blade is triangular in shape and made of medium carbon steel. After the blade is worn, the blade (8) can be welded again. An ultrasonic vibrator is installed on the outside of the flat plate of the sliding form (9) to increase the compaction of the paving layer.

2. The shearing type curved surface slipform paving device according to claim 1, characterized in that: The height of the baffle (12) is 200 mm.

3. The shearing type curved surface slipform paving device according to claim 1, characterized in that: An electric heating device or LPG heater is installed outside the hopper (4). When the temperature of each joint surface is detected to be lower than 90°, the heating temperature should be controlled between 100 and 130°C. When heating the construction joint, the heating depth should be ensured to be no less than 7cm.

4. The shearing type curved surface slipform paving device according to claim 1, characterized in that the asphalt Concrete enters the hopper through the distributor (5) and is fed evenly. The distributor is a grid structure. The size of the grid holes is opposite to the normal distribution. The grid leaves (14) in the distributor frame (15) are distributed densely in the middle and sparsely on both sides. The closer to the side of the distributor frame, the larger the distance between the grid leaves, which promotes the uniform pouring of asphalt concrete into the hopper and is conducive to compaction by the tamping mechanism.

Images