Pebble preheating output device for asphalt pavement thermal regeneration vehicle

Abstract

The utility model relates to a stone preheating output device for an asphalt pavement thermal regeneration vehicle. The device structurally comprises a stone stock bin arranged on a bottom plate of a compartment of the asphalt pavement thermal regeneration vehicle, a heat exchange pipe arranged in the stone stock bin, a combustor arranged in the heat exchange pipe and a conveying device arranged below the stone stock bin. A feed port is formed in the upper end of the stone bin, and a discharge port is formed in the lower end of the stone bin; an opening vertically corresponding to the conveying device is formed in the bottom plate. According to the utility model, the heat exchange pipe is arranged in the stone bin, and hot air is generated by burning in the heat exchange pipe through the burner, so that the stones are preheated, and after the preheated stones are paved on an old road surface, the time for subsequently preheating the old road surface and the stones can be shortened, the construction progress is accelerated, the energy consumption is reduced, and the construction efficiency is improved. Therefore, the construction cost is reduced, and meanwhile, the emission of pollutants generated by combustion during heating is reduced.

Description

Technical Field

[0001] This utility model relates to a construction machine, specifically a preheating and output device for asphalt pavement hot recycling vehicle aggregates. Background Technology

[0002] Asphalt pavement hot recycling trucks are specialized vehicles used for road maintenance and repair. They perform a series of operations on existing asphalt pavements, including heating, loosening, adding new materials, mixing, and compacting, thereby reusing the old pavement materials to repair and enhance pavement performance. The application of this equipment helps reduce the use of new materials, decrease waste generation, and improve construction efficiency and quality.

[0003] CN201610385464.8, A method for hot recycling of road surface, Hebei Fubo Machinery Manufacturing Co., Ltd., 2016-10-26; CN201910656468.9, An integrated vehicle for on-site hot recycling of asphalt pavement, Hebei Fubo Machinery Manufacturing Co., Ltd., 2019-09-10. In both documents, the method for hot recycling of road surface using an asphalt pavement hot recycling vehicle involves laying a layer of crushed stone on the old pavement before preheating it. Then, a heating plate is used to preheat both the old pavement and the crushed stone, preventing overheating of the old pavement during preheating. However, during winter construction, the heating efficiency of the old pavement and crushed stone is significantly reduced due to the low temperature, resulting in a longer preheating process and a significant increase in energy consumption. This not only prolongs the hot recycling operation time but also increases construction costs. Utility Model Content

[0004] The purpose of this utility model is to provide a preheating and output device for aggregates in asphalt pavement hot recycling vehicles, so as to solve the problems of long operation time and high construction cost of existing asphalt pavement hot recycling vehicles.

[0005] This utility model is implemented as follows: a preheating and output device for aggregates in an asphalt pavement hot recycling vehicle, the structure of which includes an aggregate bin on the floor of the asphalt pavement hot recycling vehicle, a heat exchange pipe in the aggregate bin, a burner in the heat exchange pipe, and a conveying device below the aggregate bin; an inlet is provided at the upper end of the aggregate bin and an outlet is provided at the lower end; and an opening is provided on the floor corresponding vertically to the conveying device.

[0006] Furthermore, a discharge conduit corresponding to the discharge port is provided at the lower end of the stone hopper, and the lower end of the discharge conduit is located below the bottom plate.

[0007] Furthermore, the heat exchange tube includes a horizontal tube passing through the lower part of the stone silo, a serpentine tube connected to the inner end of the horizontal tube, and a vertical tube connected to the upper end of the serpentine tube, with the burner located in the horizontal tube.

[0008] Furthermore, a support frame is provided at the lower end of the stone hopper. The support frame includes four legs on the base plate, two horizontal supports on the four legs, and two vertical supports between the two horizontal supports. Both the horizontal supports and the vertical supports are connected to the stone hopper.

[0009] Furthermore, the four support legs are arranged on both sides of the opening in the base plate, with two support legs on each side, and the four support legs are symmetrically distributed.

[0010] Furthermore, the horizontal brace spans above the opening in the base plate, the horizontal brace is perpendicular to the longitudinal brace, and both the horizontal brace and the longitudinal brace are located outside the discharge conduit.

[0011] Furthermore, the conveying device includes a conveyor belt and baffles disposed on the conveyor belt, the baffles being strip-shaped and perpendicular to the running direction of the conveyor belt.

[0012] Furthermore, the conveying device includes a receiving plate disposed below the stone hopper, two chains sleeved on the receiving plate, and several scrapers connected between the two chains.

[0013] Furthermore, there are two burners in each of the horizontal tubes.

[0014] Furthermore, two support rods are provided at the upper end of the stone hopper, and the two support rods are symmetrically arranged at both ends of the stone hopper, with a vertical pole connected to both ends of each support rod.

[0015] This invention preheats the stones by installing heat exchange pipes inside the stone silo and using a burner to generate hot air within the heat exchange pipes. After the preheated stones are laid on the old road surface, the time required for subsequent preheating of the old road surface and stones is reduced, thus accelerating the construction process, reducing energy consumption, lowering construction costs, and reducing the emission of pollutants generated during heating.

[0016] This invention enhances the overall stability and load-bearing capacity of the stone silo by installing support rods, uprights, reinforcing plates, and diagonal braces, enabling it to remain stable under long-term heavy loads. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a perspective view of Example 1.

[0019] Figure 3 yes Figure 2 Side view.

[0020] Figure 4 yes Figure 2 Top view.

[0021] Figure 5 yes Figure 2 Front view.

[0022] Figure 6 This is a schematic diagram of the heat exchange tube structure.

[0023] Figure 7 This is a schematic diagram of the structure of Example 2.

[0024] In the diagram: 1. Base plate, 2. Stone hopper, 3. Heat exchange tube, 4. Burner, 5. Conveying device, 6. Hoses, 7. Fuel delivery pipe, 8. Support rod, 9. Upright pole, 10. Discharge conduit, 11. Reinforcing plate, 12. Diagonal brace, 13. Support leg, 14. Horizontal brace, 15. Longitudinal brace, 31. Horizontal pipe, 32. Serpentine pipe, 33. Vertical pipe, 51. Baffle, 52. Conveyor belt, 53. Receiving plate, 54. Chain, 55. Scraper. Detailed Implementation

[0025] Example 1

[0026] like Figures 1-5 As shown, this utility model includes a gravel bin 2 mounted on the floor 1 of the asphalt pavement hot recycling vehicle, a heat exchange pipe 3 disposed within the gravel bin 2, a burner 4 disposed within the heat exchange pipe 3, and a conveying device 5 disposed below the gravel bin 2. The conveying device 5 is located below the floor 1, and the floor 1 has an opening vertically corresponding to the conveying device 5. This opening allows heated gravel to fall smoothly from the gravel bin 2 onto the conveying device 5, and then be transported to subsequent processing equipment. The burner 4 is connected to a fuel delivery pipe 7 via a hose 6, and the fuel delivery pipe 7 is connected to a fuel storage tank (not shown). The fuel used can be natural gas or oil.

[0027] The gravel hopper 2 is shaped like a square funnel, which facilitates the smooth flow of gravel and ensures its effective discharge. A gravel inlet is located at the top of the hopper 2, and a gravel outlet is located at the bottom. The inlet is large enough to accommodate and introduce a large quantity of gravel. The outlet is smaller than the inlet and is located above the conveying device 5. A discharge guide pipe 10 is vertically installed at the bottom of the gravel hopper 2, corresponding to the outlet. The outlet is located above the bottom plate 1, and the lower end of the discharge guide pipe 10 is below the bottom plate 1. Due to the funnel shape of the gravel hopper 2, the gravel flows naturally towards the outlet under gravity and falls onto the conveying device 5 via the discharge guide pipe 10. The discharge conduit 10 prevents stones from falling onto the base plate 1. Simultaneously, the conveying device 5 acts as a lower sealing plate for the stone hopper 2 to some extent. The discharge conduit 10 shortens the distance between the discharge port and the conveying device 5. When stones are added to the stone hopper 2, they initially fall onto the conveying device 5 through the discharge port. Once a certain amount of stones is added, the accumulated stones on the conveying device 5 will block the lower end of the discharge conduit 10. Subsequent additions of stones will then accumulate inside the stone hopper 2. Because the distance between the discharge conduit 10 and the conveying device 5 is small, only a small amount of stones is needed to block the discharge conduit 10. After the conveying device 5 starts operating, it removes the stones blocking the lower part of the discharge conduit 10, and the stones in the stone hopper 2 continue to fall onto the conveying device 5 through the discharge conduit 10.

[0028] like Figure 6 As shown, the heat exchange tube 3 includes a horizontal tube 31 passing through the lower part of the gravel hopper 2, a serpentine tube 32 connected to the inner end of the horizontal tube 31, and a vertical tube 33 connected to the upper end of the serpentine tube 32. The burner 4 is placed in the horizontal tube 31. When the burner 4 is started and releases heat, the generated hot air flows along the horizontal tube 31, turns through the heat exchange tube 31, and is finally discharged upward through the vertical tube 33. Most of the heat exchange tube 3 is located in the gravel hopper 2, with only one end of the horizontal tube 31 located outside the gravel hopper 2. The serpentine tube is S-shaped to increase the contact area with the gravel, thereby improving the heat exchange effect between the hot air and the gravel. Several heat exchange tubes 3 are provided at the lower part of the gravel hopper 2 to improve the heating efficiency of the gravel in the gravel hopper 2. In this embodiment, two rows of heat exchange tubes 3 are provided, with three heat exchange tubes 3 in the lower row and four heat exchange tubes 3 in the upper row. The upper heat exchange tubes 3 and the lower heat exchange tubes 4 are staggered. The appropriate number of heat exchange tubes 31 can be selected based on the actual dimensions of the stone silo 2 and the heat exchange tubes 31. In this embodiment, each horizontal tube 31 is equipped with two burners 4 to accelerate the generation and transfer of heat, thereby improving the overall heating efficiency of the stone silo 2. Furthermore, if one burner 4 fails, the other burner 4 can continue to operate, ensuring that the heating process of the stone silo 2 is not interrupted, thus enhancing the reliability and stability of the system.

[0029] The conveying device 5 includes a conveyor belt 52 and a baffle 51 disposed on the conveyor belt 52. The baffle 51 is strip-shaped and perpendicular to the running direction of the conveying device 5. The baffle 51 is used to prevent stones from slipping and to ensure that the stones move along the direction of the conveying device 5.

[0030] Two support rods 8 are installed at the upper end of the stone hopper 2. The two support rods 8 are symmetrically arranged at both ends of the stone hopper 2, serving to connect and fix it, helping to maintain the shape and stability of the hopper, and preventing the stone hopper 2 from deforming or being damaged due to excessive pressure. At both ends of each support rod 8, there is a vertical rod 9. The lower end of the vertical rod 9 is connected to the base plate 1, forming a stable support structure.

[0031] A reinforcing plate 11 is installed in the middle of the outer wall of the stone silo 2, and a diagonal brace 12 is installed between the reinforcing plate 11 and the bottom plate 1 to improve the structural strength and stability of the stone silo 2 and ensure its safety and reliability under long-term heavy load use. A reinforcing plate 11 and a diagonal brace 12 are installed on each side of the stone silo 2. This design allows the stone silo 2 to withstand greater stone weight and more complex stress conditions, while reducing maintenance and replacement costs due to structural deformation. In this embodiment, both the reinforcing plate 11 and the diagonal brace 12 are channel steel.

[0032] A support frame is installed at the lower end of the stone hopper 2. The support frame includes four legs 13 mounted on the base plate 1, two horizontal braces 14 mounted on the four legs 13, and two longitudinal braces 15 positioned between the two horizontal braces. Both the horizontal braces 14 and the longitudinal braces 15 are connected to the stone hopper 2. The four legs 13 are located on both sides of the opening in the base plate 1, with two legs 13 on each side, symmetrically distributed. The two horizontal braces 14 are connected to the upper ends of the four legs 13, spanning across the opening in the base plate 1. The function of the horizontal braces 14 is to bear the weight and pressure from the stone hopper 2 and distribute it to the four legs 13. The longitudinal braces 15 intersect the horizontal braces 14 perpendicularly, forming a complete support frame. The function of the longitudinal braces 15 is to enhance the overall stability of the support frame and, together with the horizontal braces 14, provide all-around support for the stone hopper 2. Both the horizontal braces 14 and the longitudinal braces 15 are located outside the discharge guide 10. In this embodiment, the support legs 13, the horizontal brace 14 and the vertical brace 15 are all made of channel steel supports, and iron plates, steel pipes or other profiles can also be used according to the actual situation.

[0033] Example 2

[0034] The difference between this embodiment and Embodiment 1 lies in the use of a different conveying device 5. The conveying device 5 includes a receiving plate 53 positioned below the outlet of the stone hopper 2, two chains 54 sleeved on the receiving plate 53, and several scrapers 55 connected between the two chains 54. The scrapers 55 are perpendicular to the two chains 54, with their lower sides contacting the upper side of the receiving plate 53. The rotation of the two chains 54 drives the scrapers 55 to move, scraping away the stones falling onto the receiving plate 53. The receiving plate 53 not only receives stones falling from the stone hopper 2 but also acts as a lower sealing plate for the stone hopper 2, effectively preventing stones from falling out of the hopper 2 when the conveying device 5 is not in operation.

Claims

1. A stone preheating and discharging device for an asphalt pavement hot recycling vehicle, characterized by comprising: a stone preheating device; a stone discharging device; a stone conveying device; and a control device. The application relates to a stone bin for an asphalt pavement hot recycling vehicle, which comprises a stone bin arranged on a bottom plate of a vehicle compartment of the asphalt pavement hot recycling vehicle, a heat exchange pipe arranged in the stone bin, a burner arranged in the heat exchange pipe and a conveying device arranged below the stone bin; an inlet is arranged at an upper end of the stone bin, and an outlet is arranged at a lower end of the stone bin; an opening corresponding to the conveying device is arranged on the bottom plate.

2. The stone preheating and discharging apparatus for an asphalt pavement hot recycling vehicle according to claim 1, wherein The lower end of the stone bin is provided with an outlet guide pipe corresponding to the outlet, and the lower end of the outlet guide pipe is located below the bottom plate.

3. The stone preheating output device for an asphalt pavement hot-recycling vehicle according to claim 1, characterized by The heat exchange pipe comprises a horizontal pipe penetrating through a lower part of the stone bin, a snake-shaped pipe connected to an inner end of the horizontal pipe and a vertical pipe connected to an upper end of the snake-shaped pipe, and the burner is arranged in the horizontal pipe.

4. The stone preheating and discharging apparatus for an asphalt pavement hot recycling vehicle according to claim 2, wherein The lower end of the stone bin is provided with a support frame, the support frame comprises four supporting legs arranged on the bottom plate, two cross supports arranged on the four supporting legs and two longitudinal supports arranged between the two cross supports, and the cross supports and the longitudinal supports are connected to the stone bin.

5. The stone preheating output device for an asphalt pavement hot-recycling vehicle according to claim 4, characterized by The four supporting legs are arranged on both sides of the opening of the bottom plate, two supporting legs are arranged on each side, and the four supporting legs are symmetrically distributed.

6. The stone preheating output device for an asphalt pavement hot-recycling vehicle according to claim 5, characterized by The cross supports are arranged above the opening of the bottom plate, the cross supports are perpendicular to the longitudinal supports, and the cross supports and the longitudinal supports are located on the outer side of the outlet guide pipe.

7. The asphalt pavement hot-in-place recycling machine stone preheating and discharging apparatus according to claim 1, characterized in that, The conveying device comprises a conveying belt and a baffle arranged on the conveying belt, the baffle is in a strip shape and is perpendicular to the running direction of the conveying belt.

8. The stone preheating and discharging apparatus for an asphalt pavement hot-recycling vehicle according to claim 1, characterized by The conveying device comprises a receiving plate arranged below the stone bin, two chains sleeved on the receiving plate and a plurality of scrapers connected between the two chains.

9. The stone preheating output device for an asphalt pavement hot-recycling vehicle according to claim 3, characterized by The burner in each horizontal pipe has two.

10. The stone preheating output device for an asphalt pavement hot-recycling vehicle according to claim 1, characterized in that, in The upper end of the stone bin is provided with two supporting rods, the two supporting rods are symmetrically arranged at two ends of the stone bin, and a vertical rod is connected to each end of each supporting rod.

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