In-situ hot regeneration unit capable of simultaneously realizing aging layer removal and lateral material addition and construction method thereof

Abstract

The present invention discloses an on-site hot regeneration unit capable of simultaneously realizing the removal of aged layers and lateral material addition and a construction method thereof. The on-site hot regeneration unit capable of simultaneously realizing the removal of aged layers and lateral material addition comprises a hot air heater, a heating removal machine, an old asphalt aged layer transport vehicle, a heating milling machine, a new asphalt mixture transport vehicle, a material adding and remixing machine and a paver; the hot air heater, the heating removal machine, the heating milling machine, the material adding and remixing machine and the paver are successively arranged in the regeneration lane; the old asphalt aged layer transport vehicle and the new asphalt mixture transport vehicle are both located in the lateral lane of the regeneration lane, the old asphalt aged layer transport vehicle receives the old asphalt aged layer transported by the heating removal machine; the new asphalt mixture transport vehicle outputs the new asphalt mixture to the material adding and remixing machine. The present invention can complete the removal of the 5-10 mm asphalt pavement aged layer at one time without gradation damage, thereby improving the quality of the recycled material.

Description

Technical Field

[0001] The invention relates to the technical field of road maintenance equipment, and in particular to an on-site hot regeneration unit capable of simultaneously realizing aging layer removal and lateral material addition, and a construction method thereof. Background Art

[0002] The huge maintenance workload of national and provincial trunk roads, especially expressways, the high standards of maintenance project quality and the maintenance working environment under extremely large traffic conditions have prompted us to seek a new maintenance method - in-situ hot regeneration, which is a technology that uses special in-situ hot regeneration equipment to heat and mill the asphalt pavement, then add a certain amount of new asphalt mixture, and through mixing, paving, rolling and other processes, it can regenerate the old asphalt pavement within a certain depth range of the surface at one time.

[0003] At present, the existing in-situ heat regeneration units at home and abroad have the following main defects:

[0004] (1) The aging layer of asphalt pavement affects the quality of regeneration. Asphalt pavement will age and deteriorate after long-term exposure to the sun and wheel rolling. The in-situ hot regeneration process uses multiple pavement heating machines to heat and soften the asphalt pavement. The use of open flames, gas infrared, high-temperature hot air and other heating methods will also cause the 5-10 mm surface layer of the asphalt pavement to age and burn. Once the asphalt material ages and deteriorates, its performance is difficult to restore. At present, there is no special equipment on the market that can continuously and uninterruptedly remove the aging layer of asphalt pavement.

[0005] (2) It is difficult to add new materials and the heat loss is large. After heating and milling, the original asphalt pavement will be piled up with a thickness of 200mm to 300mm. Before the material transport dump truck adds materials, multiple road heating machines and heating milling machines need to move forward 20m to 30m, and then the transport dump truck will cross the thick material pile and ride on the material pile to add materials into the hopper of the remixer, causing the remixer to stop working frequently. After the addition is completed, the thick material pile is driven out, and then multiple heating machines and heating milling machines retreat to their positions and resume operation. This adding process has the defects of difficult adding, long interval time, large heat loss, and poor regeneration flatness;

[0006] (3) A single mixing device is affected by its overall length, resulting in short mixing time and poor mixing uniformity. The heating of mixing tanks on the market mostly adopts open flame or infrared heating, and the heating temperature is uncontrollable, which can easily cause the asphalt mixture to burn and deteriorate.

[0007] (4) Excessive size, weight and limit. The local heat regeneration units on the market are large in size and overweight, making them difficult to climb and transfer.

[0008] The above defects have resulted in the in-situ hot regeneration units on the market being unable to meet the requirements of safe maintenance, high standards and high quality maintenance of modern asphalt pavements (especially highways and municipal roads). Summary of the invention

[0009] In view of the above problems, the present invention proposes an on-site hot regeneration unit and a construction method thereof which can simultaneously realize the removal of the aged layer and lateral feeding. It can complete the removal of the aged layer of 5 to 10 mm asphalt pavement in one go without damaging the grading, thereby improving the quality of the recycled material.

[0010] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0011] In the first aspect, the present invention provides an on-site hot regeneration unit that can simultaneously realize the removal of aged layers and lateral material addition, including a hot air heater, a heating removal machine, a transport vehicle for the old asphalt aged layer, a heating milling machine, a transport vehicle for new asphalt mixture, a material adding remixing machine and a paver;

[0012] The hot air heater, heating rejecter, heating milling machine, material adding and mixing machine, and paver are all arranged in sequence on the regeneration lane;

[0013] The old asphalt aged layer transport vehicle and the new asphalt mixture transport vehicle are both located in the lateral lanes of the regeneration lane, close to the heating rejecting machine and the heating milling machine respectively.

[0014] Optionally, the number of the hot air heaters is 2-3, which are used to heat the old asphalt pavement; each hot air heater includes a hot air heater body, and several groups of pavement heating walls arranged in sequence front and back below the hot air heater body, and a pavement insulation plate is provided at the very end of the hot air heater.

[0015] Optionally, the heating removal machine is used for removing and conveying the aged layer of old asphalt pavement; the heating removal machine comprises a heating removal machine body, at least two groups of pavement heating walls are provided at the lower front part of the heating removal machine body, an aged layer removal device is provided behind the pavement heating wall, a vertical scraper and conveyor device is provided at the rear of the aged layer removal device, and a pavement heating wall and a pavement insulation board are provided in sequence behind the vertical scraper and conveyor.

[0016] Optionally, the aged layer removal device comprises a fixed frame, a lifting frame, two symmetrical groups of lifting cylinders, a connecting rod, a harrowing feeder I, a sliding cylinder I, a harrowing feeder II and a sliding cylinder II;

[0017] The fixing frame is fixed on the frame;

[0018] The lifting frame is connected to the fixing frame via a parallelogram linkage mechanism;

[0019] The cylinder bodies and piston rods of the two symmetrical groups of lifting cylinders are pin-connected to the fixing frame and the lifting frame respectively;

[0020] The harrowing and loosening conveyor I and the harrowing and loosening conveyor II are suspended under the lifting frame in a relative manner;

[0021] The cylinder body and piston rod of the sliding oil cylinder I are pin-connected to the lifting frame and the harrowing feeder I respectively;

[0022] The cylinder body and piston rod of the sliding oil cylinder II are pin-connected to the lifting frame and the harrowing and loosening feeder II respectively.

[0023] Optionally, the vertical scraper conveying device includes left and right telescopic sleeves, left and right telescopic cylinders, up and down lifting sliding components, up and down lifting cylinders, a vertical lifting frame, a scraper bucket chain, a driving shaft, a driven shaft, a supporting wheel shaft, a material outlet, a receiving hopper, a slewing bearing, and a screw feeder;

[0024] The outer cylinders of the left and right telescopic sleeves are connected to the frame, and the inner cylinders are connected to the up and down lifting and sliding components;

[0025] The cylinder bodies and piston rods of the left and right telescopic oil cylinders are pin-connected to the frame and the up and down lifting and sliding components respectively;

[0026] The up and down lifting and sliding components are nested in the vertical lifting frame;

[0027] The cylinder body and piston rod of the up and down lifting oil cylinder are respectively pin-connected with the up and down lifting sliding assembly and the vertical lifting frame;

[0028] Under the action of the left and right telescopic oil cylinders, the up and down lifting sliding assembly and the vertical lifting frame can achieve left and right telescopic movement;

[0029] Under the action of the up and down lifting cylinder, the vertical lifting frame can be adjusted up and down along the up and down lifting sliding assembly;

[0030] The scraper bucket chain is placed in the vertical lifting frame;

[0031] The driving shaft, the supporting wheel shaft and the driven shaft are arranged from top to bottom and are chain-connected with the scraper bucket;

[0032] The discharge port is located at the top of the vertical lifting frame;

[0033] A receiving hopper is installed on the upper part of the screw feeder, which is located below the discharge port. The screw feeder is fixed on the vertical lifting frame through a slewing bearing. Under the action of the slewing bearing, the screw feeder can realize circular slewing motion to adjust the feeding height and angle.

[0034] Optionally, the vertical scraper conveyor of the heating rejector continuously feeds material to the old asphalt aged layer transport vehicle located on the side lane, and the discharge height and length of the vertical scraper conveyor are matched with the silo of the old asphalt aged layer transport vehicle.

[0035] Optionally, the heating milling machine is used for heating and milling old asphalt pavement after removing the aging layer; the heating milling machine comprises a heating milling machine body, at least two groups of pavement heating walls are provided at the lower front part of the heating milling machine body, a pavement milling device is provided behind the pavement heating wall, a regeneration agent spraying device is provided in front of the pavement milling device, and a recycled material heating wall is provided behind the pavement milling device.

[0036] Optionally, the material-adding and remixing machine is used for lateral continuous addition of new asphalt mixture and remixing of new and old asphalt mixtures; the material-adding and remixing machine comprises a material-adding and remixing machine body, the front part of which is provided with a lateral continuous adding device, and the rear part of which is provided with a bottom stirring device, an inclined scraper lifting device and an upper stirring device in sequence.

[0037] Optionally, the lateral continuous feeding device of the feeding and remixing machine continuously feeds materials to the regeneration lane, and the material receiving height and length of the lateral continuous feeding device match the material bin discharge port of the new asphalt mixture transport vehicle.

[0038] In a second aspect, the present invention provides a construction method of an in-situ hot regeneration unit capable of simultaneously removing an aged layer and adding material from the side as described in any one of the first aspects, comprising:

[0039] The old asphalt pavement is heated by a pavement heating wall of a hot air heater, the heating depth of the old asphalt pavement is a set first depth range value, the maximum temperature of the surface layer of the old asphalt pavement is less than or equal to a set first temperature threshold value, and the temperature at the first depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold value;

[0040] Continue to heat the old asphalt pavement using the pavement heating wall of the heating rejector to ensure that the first depth range value and the second temperature threshold value meet the standards;

[0041] The aged layer removal device of the heating removal machine is used to rake and loosen the asphalt aged layer of the first depth range of the heated old asphalt pavement, remove it and transport it laterally to form an aged layer material pile; the vertical scraping and conveying device of the heating removal machine is used to vertically lift the aged layer material pile and convey it laterally to the material bin of the old asphalt aged layer transport vehicle; the road surface heating wall and road surface insulation board behind the vertical scraping and conveying device respectively heat and insulate the old asphalt pavement after the aged layer is removed;

[0042] The old asphalt pavement after the aging layer is removed is continuously heated by the pavement heating wall of the heating milling machine, the heating depth of the old asphalt pavement is the set second depth range value, the maximum temperature of the surface layer of the old asphalt pavement is less than or equal to the set second temperature threshold value, and the temperature at the second depth range value in the old asphalt pavement is greater than or equal to the set second temperature threshold value; then the regeneration agent spraying device of the heating milling machine is used to spray the heated old asphalt pavement with the regeneration agent, and then the pavement milling device is used to perform hot milling on the old asphalt pavement within the second depth range to form a regenerated material pile, the temperature of the regenerated material pile is greater than or equal to the third set temperature threshold value, and the regenerated material heating wall is used to divide, heat and aggregate the regenerated material pile to achieve secondary temperature increase of the regenerated material, so that the temperature of the regenerated material is greater than or equal to the fourth set temperature threshold value;

[0043] The storage hopper of the lateral continuous feeding equipment of the feeder mixer is used to receive the new asphalt mixture delivered by the new asphalt mixture transport vehicle, and the new asphalt mixture is accurately measured by controlling the horizontal scraper speed and the opening of the discharge door at the bottom of the storage hopper; the bottom stirring device of the feeder mixer is used to complete the first-stage mixing of the recycled material pile mixture and the new asphalt mixture and form a mixed material pile, and when the temperature of the mixed material pile is less than the set fifth temperature threshold, the hot air heating wall on the bottom stirring device is used to supplement the temperature of the mixed material; the inclined scraper lifting device continuously transports the mixed material pile to the upper stirring device, and the upper stirring device is used to complete the second-stage mixing of the recycled material pile mixture and the new asphalt mixture, and the mixed material is discharged to the receiving hopper of the paver, and when the temperature of the mixed material is less than the set sixth temperature threshold, the hot air heating wall on the upper stirring device is used to supplement the temperature of the mixed material, and the average temperature of the mixed material after heating is greater than or equal to the sixth temperature threshold; and then the paver completes the material distribution and paving pre-pressing.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention adopts a two-stage hot harrowing + feeding screw process to complete the removal of the 5-10mm asphalt pavement aging layer at one time without grading damage, thereby improving the quality of the recycled material; a vertical scraper lifting device + rotary feeding device process is adopted to realize the lateral continuous and uninterrupted transportation of the old asphalt mixture, thereby improving the working efficiency; a two-stage rotary bearing + two-stage feeding screw new structure is adopted, which is used in conjunction with a semi-mounted scraper conveying asphalt mixture vehicle. The semi-mounted scraper conveying asphalt mixture vehicle is self-propelled in the lateral lane of the regeneration lane, and the discharge port is coordinated with the first receiving hopper of the lateral continuous feeding equipment to realize multi-degree-of-freedom and multi-directional feeding, accurate and continuous feeding, and small temperature drop of the asphalt material; a combined stirring process of a bottom stirring device + an overhead stirring device is adopted to ensure sufficient mixing time for the asphalt mixture and guaranteed mixing uniformity; the new on-site hot regeneration unit is not overweight or oversize, and the transfer is flexible and convenient, thereby realizing safe regeneration, high standards, and high-quality regeneration. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0047] Figure 1 It is a schematic diagram of the working state of the present invention;

[0048] Figure 2 It is a schematic diagram of the structure of the hot air heating machine of the present invention;

[0049] Figure 3 It is a schematic diagram of the structure of the heating rejection machine of the present invention;

[0050] Figure 4 It is a schematic structural diagram of the heating milling machine of the present invention;

[0051] Figure 5 It is a structural schematic diagram of the material-adding and mixing machine of the present invention;

[0052] Figure 6 It is a schematic diagram of the structure of the aged layer removal device of the present invention;

[0053] FIG. 7( a ) is an overall schematic diagram of a vertical scraper conveying device of the present invention;

[0054] FIG7( b ) is a front view of the vertical scraper conveyor of the present invention;

[0055] FIG7( c ) is a cross-sectional view taken along line AA of FIG7( b );

[0056] Figure 8 It is a schematic diagram of the structure of the lateral continuous feeding equipment of the present invention;

[0057] Fig. 9 It is a transportation state diagram of the hot air heating machine of the present invention;

[0058] Fig.10 It is a transportation state diagram of the heating rejecting machine of the present invention;

[0059] Fig.11 It is a transportation state diagram of the heating milling machine of the present invention;

[0060] Fig.12 It is a transportation state diagram of the material-adding and remixing machine of the present invention;

[0061] In the figure: 1. hot air heating machine, 1-1. hot air heating machine body, 1-2. road surface heating wall, 1-3. road surface insulation board, 2. heating rejection machine, 2-1. heating rejection machine body, 2-2. aged layer rejection device, 2-3. vertical scraper conveyor device, 3. old asphalt aged layer transport vehicle, 4. heating milling machine, 4-1. heating milling machine body, 4-2. road surface milling device, 4-3. regeneration agent spraying device, 4-4. regeneration material heating wall, 5. new asphalt mixture transport vehicle, 6. material adding remixer, 6-1. material adding remixer body, 6-2. lateral continuous material adding equipment, 6-3. bottom stirring device, 6-4. inclined scraper lifting device, 6-5. top stirring device, 7. paver; 2-2-1. fixed frame, 2-2-2. lifting frame, 2-2-3. lifting cylinder, 2-2-4. connecting rod, 2-2-5. harrowing screw feeder Ⅰ, 2-2- 6. Sliding cylinder Ⅰ, 2-2-7, harrowing screw feeder Ⅱ, 2-2-8, sliding cylinder Ⅱ, 2-3, vertical scraper lifting device, 2-3-1, vertical lifting frame, 2-3-2, scraper bucket chain, 2-3-3, driving shaft, 2-3-4, driven shaft, 2-3-5, supporting wheel shaft, 2-3-6, discharge port, 2-3-7, receiving hopper, 2-3-8, slewing bearing, 2-3-9, screw feeder, 2-3- 10. Left and right telescopic sleeves, 2-3-11. Left and right telescopic cylinders, 2-3-12. Up and down lifting and sliding components, 2-3-13. Up and down lifting cylinders, 6-1-1. First receiving hopper, 6-1-2. First feeding unit, 6-1-3. First slewing bearing, 6-1-4. Second feeding unit, 6-1-5. Second receiving hopper, 6-1-6. Second slewing bearing, 6-1-7. Sliding frame, 6-1-8. Storage bin. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0063] The application principle of the present invention is described in detail below in conjunction with the accompanying drawings.

[0064] Example 1

[0065] like Figures 1 to 12 As shown, the in-situ hot regeneration unit of the present invention can realize the removal of aged layer and lateral material addition simultaneously, comprising a hot air heater 1, a heating removal machine 2, a transport vehicle for old asphalt aged layer 3, a heating milling machine 4, a transport vehicle for new asphalt mixture 5, a material adding and remixing machine 6, and a paver 7;

[0066] The hot air heating machine 1, heating rejection machine 2, heating milling machine 4, material adding and mixing machine 6, and paver 7 are all located in the regeneration lane, and are arranged in sequence from front to back; the old asphalt aging layer transport vehicle 3 and the new asphalt mixture transport vehicle 5 are both located in the lateral lanes of the regeneration lane, close to the heating rejection machine 2 and the heating milling machine 4 respectively.

[0067] like Figure 2 As shown, the hot air heating machine 1 is provided with 2 to 3 units, which are used to heat the old asphalt pavement; each hot air heating machine 1 comprises a hot air heating machine body 1-1, and a plurality of pavement heating walls 1-2 arranged in sequence at the bottom of the body, and a pavement insulation board 1-3 is provided at the rear end of the hot air heating machine 1;

[0068] like Figure 3 As shown, the heating and removing machine 2 is used for removing and conveying the aged layer of the old asphalt pavement; the heating and removing machine 2 comprises a heating and removing machine body 2-1, at least two groups of pavement heating walls 1-2 are arranged at the lower front part of the heating and removing machine body 2-1, an aged layer removing device 2-2 is arranged behind the pavement heating wall 1-2, a vertical scraper and conveyor 2-3 is arranged at the rear of the aged layer removing device 2-2, a pavement heating wall 1-2 and a pavement insulation board 1-3 are arranged in sequence behind the vertical scraper and conveyor 2-3; the vertical scraper and conveyor 2-3 of the heating and removing machine 2 continuously conveys materials to the lateral lane, and the discharge height and length of the vertical scraper and conveyor 2-3 are matched with the silo of the old asphalt aged layer transport vehicle 3.

[0069] like Figure 6 As shown, the aged layer removal device 2-2 includes: a fixed frame 2-2-1, a lifting frame 2-2-2, a lifting cylinder 2-2-3, a connecting rod 2-2-4, a rake screw feeder I 2-2-5, a sliding cylinder I 2-2-6, a rake screw feeder II 2-2-7, and a sliding cylinder II 2-2-8. The fixed frame 2-2-1 is fixed on the frame 1, and the lifting frame 2-2-2 is connected to the fixed frame 2-2-1 through four groups of connecting rods 2-2-4 to form a parallelogram connecting rod mechanism. The two groups of lifting cylinders symmetrically move upward and downward. The cylinder body and piston rod of cylinder 2-2-3 are pinned to fixed frame 2-2-1 and lifting frame 2-2-2 respectively; harrowing screw feeder I 2-2-5 and harrowing screw feeder II 2-2-7 are suspended under lifting frame 2-2-2 one after the other; the cylinder body and piston rod of sliding oil cylinder I 2-2-6 are pinned to lifting frame 2-2-2 and harrowing screw feeder I 2-2-5 respectively; the cylinder body and piston rod of sliding oil cylinder II 2-2-8 are pinned to lifting frame 2-2-2 and harrowing screw feeder II 2-2-7 respectively. The present invention adopts a bidirectional sliding oil cylinder and a new C-type slideway structure to realize the extension and folding of the harrowing screw feeder. As the width of the lane changes, the harrowing screw feeder is extended and folded to realize variable width operation.

[0070] As shown in Fig. 7(a)-(c), the vertical scraper and conveying device 2-3 adopts a vertical scraper lifting + rotary conveying process to achieve continuous and uninterrupted lateral conveying of the old asphalt mixture, thereby improving the working efficiency. The vertical scraper and lifting device 2-3 includes a vertical lifting frame 2-3-1, a scraper bucket chain 2-3-2, a driving shaft 2-3-3, a driven shaft 2-3-4, a supporting wheel shaft 2-3-5, a discharge port 2-3-6, a receiving hopper 2-3-7, a slewing bearing 2-3-8, a screw feeder 2-3-9, left and right telescopic sleeves 2-3-10, left and right telescopic cylinders 2-3-11, an up and down lifting sliding assembly 2-3-12, an up and down lifting cylinder 2-3-13, a left and right telescopic sleeve 2-3-10, a left and right telescopic cylinder 2-3-11, an up and down lifting sliding assembly 2-3-12, an up and down lifting cylinder 2-3-13, a left and right telescopic sleeve 2-3-10, a left and right telescopic cylinder 2-3-11, an up and down lifting sliding assembly 2-3-12, an up and down lifting cylinder 2-3-13, The outer tube of the retractable sleeve 2-3-10 is connected to the frame 1, and the inner tube is connected to the up-and-down lifting sliding assembly 2-3-12. The cylinder body and piston rod of the left and right telescopic cylinders 2-3-11 are pin-connected to the frame 1 and the up-and-down lifting sliding assembly 2-3-12 respectively. The up-and-down lifting sliding assembly 2-3-12 is nested in the vertical lifting frame 2-3-1. The cylinder body and piston rod of the up-and-down lifting cylinder 2-3-13 are pin-connected to the up-and-down lifting sliding assembly 2-3-12 and the vertical lifting frame 2-3-1 respectively. Under the action of the left and right telescopic cylinders 2-3-11, the up-down lifting sliding assembly 2-3-12 and the vertical lifting frame 2-3-1 can be extended and retracted left and right. Under the action of the up-down lifting cylinders 2-3-13, the vertical lifting frame 2-3-1 can be adjusted up and down along the up-down lifting sliding assembly 2-3-12. The scraper bucket chain 2-3-2 is placed in the vertical lifting frame 2-3-1, and the driving shaft 2-3-3, the supporting wheel shaft 2-3-5 and the driven shaft 2-3-4 are arranged from top to bottom. The material discharging port 2-3-6 is located at the top of the vertical lifting frame 2-3-1, and the receiving hopper 2-3-7 is installed on the upper part of the screw feeder 2-3-9, which is located below the material discharging port 2-3-6. The screw feeder 2-3-9 is fixed to the vertical lifting frame 2-3-1 through a slewing bearing 2-3-8. Under the action of the slewing bearing 2-3-8, the screw feeder 2-3-9 can realize circular rotary motion to adjust the feeding height and angle.

[0071] like Figure 4 As shown, the heating milling machine 4 is used for heating and milling the old asphalt pavement after removing the aged layer; the heating milling machine 4 comprises a heating milling machine body 4-1, at least two groups of pavement heating walls 1-2 are arranged at the lower front part of the heating milling machine body 4-1, a pavement milling device 4-2 is arranged behind the pavement heating wall 1-2, a regeneration agent spraying device 4-3 is arranged in front of the pavement milling device 4-2, and a regeneration material heating wall 4-4 is arranged behind the pavement milling device 4-2;

[0072] like Figure 5As shown, the material adding and remixing machine 6 is used for the continuous lateral addition of new asphalt mixture and the remixing of new and old asphalt mixtures; the material adding and remixing machine 6 comprises a material adding and remixing machine body 6-1, the front of which is provided with a lateral continuous material adding device 6-2, and the rear of the lateral continuous material adding device 6-2 is provided with a bottom stirring device 6-3, an inclined scraper material lifting device 6-4, and an upper stirring device 6-5 in sequence. The lateral continuous material adding device 6-2 of the material adding and remixing machine 6 continuously adds material to the reclaimed lane, and the material receiving height and length of the lateral continuous material adding device 6-2 match the material bin discharge port of the new asphalt mixture transport vehicle 5.

[0073] like Figure 8 The lateral continuous feeding device 6-1 includes:

[0074] A first feeding unit 6-1-2, wherein a first receiving hopper 6-1-1 is provided at a feeding port of the first feeding unit 6-1-2. Specifically, the first feeding unit 6-1-2 is located above the feeding port of the first feeding unit 6-1-2. The first feeding unit 6-1-2 may be a first screw feeder;

[0075] The second feeding unit 6-1-3 is connected to the first feeding unit 6-1-2 through the first slewing bearing 6-1-3, and its inlet corresponds to the outlet of the first feeding unit 6-1-2. The second feeding unit 6-1-4 can use a second screw feeder;

[0076] The second receiving hopper 6-1-5 is located below the discharge port of the second feeding unit 6-1-4. Specifically, the second feeding unit 6-1-4 is pinned to the second receiving hopper 5, and the discharge port of the second feeding unit 6-1-4 is located directly above the second receiving hopper 5;

[0077] The sliding frame 6-1-7 is connected to the second receiving hopper 6-1-5 through the second slewing bearing 6-1-6;

[0078] The storage bin 6-1-8 is connected to the sliding frame 6-1-7, and its feed port corresponds to the discharge port of the second receiving hopper 6-1-5, and is used for storing materials; in the specific implementation, the storage bin 6-1-8 can be a V-shaped storage bin 6-1-8, and the bottom cross-section is smaller than the top cross-section;

[0079] The boom cylinder 6-1-9 has a cylinder body connected to the second material receiving hopper 6-1-5, and a piston rod connected to the second material feeding unit 6-1-4.

[0080] In summary, it can be seen that under the action of the variable amplitude cylinder 6-1-9, the second feeding unit 6-1-4 drives the first feeding unit 2 and the first slewing bearing 6-1-3 to perform variable amplitude adjustment within the range of 45°; under the action of the first slewing bearing 6-1-3, the first receiving hopper 6-1-1 and the first feeding unit 6-1-2 can achieve a 360° rotation operation relative to the maximum angle; under the action of the second slewing bearing 6-1-6, the second feeding unit 6-1-4 can achieve a 180° rotation operation relative to the maximum angle.

[0081] Example 2

[0082] A construction method of an in-situ hot regeneration unit capable of simultaneously realizing the removal of the aged layer and the lateral feeding is as follows:

[0083] Step S1, using a plurality of groups of pavement heating walls 1-2 of a hot air heating machine 1 to heat the old asphalt pavement; the heating depth of the old asphalt pavement is a set first depth range value (5-10 mm), the maximum temperature of the surface layer of the old asphalt pavement is less than or equal to a set first temperature threshold value (180-200° C.), and the temperature at the first depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold value (110-130° C.);

[0084] Step S2, using the road heating wall 1-2 of the heating and rejecting machine 2 to continue heating the old asphalt road surface, ensuring that the first depth range value (5-10mm) and the second temperature threshold value (110-130°C) meet the standards; using the aged layer rejecting device 2-2 in the heating and rejecting machine to rake, remove and laterally transport the asphalt aged layer in the first depth range value (5-10mm) of the heated old asphalt road surface to form an aged layer material pile; using the vertical scraping and conveying device 2-3 in the heating and rejecting machine to vertically lift the aged layer material pile and laterally transport it to the silo of the old asphalt aged layer transport vehicle 3; the road heating wall 1-2 and the road insulation board 1-3 behind the vertical scraping and conveying device 2-3 respectively heat and insulate the old asphalt road surface after the aged layer is removed;

[0085] Step S3, using the road heating wall 1-2 of the heating milling machine 4 to continue heating the old asphalt road surface after the aging layer is removed, the heating depth of the old asphalt road surface is the set second depth range value (40-50mm), the maximum temperature of the surface layer of the old asphalt road surface is less than or equal to the set second temperature threshold value (180-200°C), and the temperature at the second depth range value in the old asphalt road surface is greater than or equal to the set second temperature threshold value (110-130°C); then using the regeneration agent spraying device 4-3 of the heating milling machine 4 to spray the heated old asphalt road surface with the regeneration agent, and then using the road milling device 4-2 to perform hot milling on the old asphalt road surface within the second depth range to form a regenerated material pile, the temperature of the regenerated material pile is greater than or equal to the third set temperature threshold value (120-130°C), and the regenerated material heating wall 4-4 divides the regenerated material pile, heats it, and aggregates it, so as to achieve secondary temperature increase of the regenerated material, so that the temperature of the regenerated material is greater than or equal to the fourth set temperature threshold value (130-140°C);

[0086] Step S4, utilize the lateral continuous feeding device 6-2 of the feeding and remixing machine 6 to connect the receiving hopper with the material bin discharge port of the new asphalt mixture transport vehicle 5, and convey the new asphalt mixture to the storage hopper of the feeding and remixing machine 6 through the lateral feeding screw, and realize the accurate metering of the new asphalt mixture by controlling the horizontal scraper speed and the opening of the discharge door at the bottom of the storage hopper; utilize the bottom-mounted stirring device 6-3 of the feeding and remixing machine 6 to complete the first-stage mixing of the recycled material pile mixture and the new asphalt mixture and form a mixed material pile, and when the temperature of the mixed material pile is lower than the set fifth temperature threshold value (140-150°C), utilize the hot air heating wall on the bottom-mounted stirring device 6-3 to supplement the temperature of the mixed material. Heat; the inclined scraper lifting device 6-4 continuously transports the mixed material pile to the upper stirring device 6-5, and the upper stirring device 6-5 is used to complete the second stage of fully mixing the recycled material pile mixture and the new asphalt mixture, and the mixed material is discharged to the receiving hopper of the paver 7. When the temperature of the mixed material is lower than the set sixth temperature threshold (150-160°C), the hot air heating wall on the upper stirring device 6-5 is used to supplement the temperature of the mixed material. After heating, the average temperature of the mixed material is greater than or equal to the sixth temperature threshold; then the spreading spiral and paving ironing plate of the paver 7 are used to complete the spreading and paving pre-pressing, and finally the roller is compacted to obtain a recycled asphalt pavement.

[0087] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0088] The present invention provides an on-site hot regeneration unit which can simultaneously realize the removal of the aged layer and the lateral feeding. The two-stage hot harrowing + feeding screw process is adopted to complete the removal of the aged layer of the asphalt pavement of 5-10 mm at one time without damaging the grading, thereby improving the quality of the recycled material. The vertical scraper lifting device + rotary feeding device process is adopted to realize the lateral continuous and uninterrupted transportation of the old asphalt mixture, thereby improving the working efficiency. The new structure of the two-stage rotary bearing + two-stage feeding screw is adopted, and is used in conjunction with a semi-mounted scraper conveying asphalt mixture vehicle. The semi-mounted scraper conveying asphalt mixture vehicle moves on the lateral lane of the regeneration lane by itself. The discharge port cooperates with the first receiving hopper of the lateral continuous feeding equipment to realize multi-degree-of-freedom and multi-directional feeding, accurate and continuous feeding, and small temperature drop of the asphalt material. The combined stirring process of the bottom stirring device + the top stirring device is adopted to ensure sufficient mixing time of the asphalt mixture and guaranteed mixing uniformity. The new on-site hot regeneration unit is not overweight or oversize, and is flexible and convenient to transfer, thereby realizing safe regeneration, high standards, and high-quality regeneration.

[0089] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An in-situ hot regeneration unit capable of simultaneously removing the aged layer and adding material from the side, characterized in that: Including hot air heaters, heating removers, old asphalt aged layer transporters, heating milling machines, new asphalt mixture transporters, feeder remixers and pavers; Hot air heater, heated rejecter, heated milling machine, feeder mixer and paver are all installed in the recycling lane in sequence; The old asphalt aged layer transport vehicle and the new asphalt mixture transport vehicle are both located in the lateral lane of the regeneration lane. The old asphalt aged layer transport vehicle receives the old asphalt aged layer transported by the heating and rejecting machine; the new asphalt mixture transport vehicle outputs the new asphalt mixture to the feeding and remixing machine; the heating and rejecting machine includes a heating and rejecting machine body, at least two groups of road surface heating walls are arranged at the lower front part of the heating and rejecting machine body, and an aged layer rejecting device and a vertical scraping and conveying device are arranged in sequence behind the road surface heating walls; The vertical scraper conveyor device includes: The left and right telescopic sleeves have an outer sleeve connected to the frame and an inner sleeve connected to the up and down lifting and sliding components; The left and right telescopic oil cylinders, whose cylinder bodies and piston rods are pin-connected with the frame and the up and down lifting and sliding components respectively; The up and down lifting and sliding components are nested in the vertical lifting frame; The cylinder body and piston rod of the upper and lower lifting cylinders are pin-connected with the upper and lower lifting sliding components and the vertical lifting frame respectively; Under the action of the left and right telescopic cylinders, the up and down lifting sliding components and the vertical lifting frame can be telescoped left and right; Under the action of the up and down lifting cylinders, the vertical lifting frame can be adjusted up and down along the up and down lifting sliding components; The scraper bucket chain is placed in the vertical lifting frame; The driving shaft, the supporting wheel shaft and the driven shaft are arranged from top to bottom and are connected with the scraper bucket chain; The discharge port is located at the top of the vertical lifting frame; A receiving hopper is installed on the upper part of the screw conveyor, which is located below the discharge port. The screw conveyor is fixed on the vertical lifting frame through a slewing bearing. Under the action of the slewing bearing, the screw conveyor can realize circular rotary motion.

2. According to claim 1, the in-situ hot regeneration unit capable of simultaneously realizing the removal of the aged layer and the lateral feeding is characterized in that: The number of the hot air heaters is 2-3, which are used to heat the old asphalt pavement; each hot air heater includes a hot air heater body, and several groups of pavement heating walls arranged in sequence front and back below the hot air heater body, and a pavement insulation board is provided at the very end of the hot air heater.

3. According to claim 1, the in-situ hot regeneration unit capable of simultaneously realizing the removal of the aged layer and the lateral feeding is characterized in that: The heating remover is used for removing and conveying the aged layer of the old asphalt pavement; a pavement heating wall and a pavement insulation board are arranged in sequence behind the vertical scraper and conveyor device.

4. According to claim 3, the in-situ hot regeneration unit capable of simultaneously realizing the removal of the aged layer and the lateral feeding is characterized in that: The aged layer removal device comprises a fixed frame, a lifting frame, two symmetrical lifting cylinders, a connecting rod, a harrowing feeder I, a sliding cylinder I, a harrowing feeder II and a sliding cylinder II; The fixing frame is fixed on the frame; The lifting frame is connected to the fixing frame via a parallelogram linkage mechanism; The cylinder bodies and piston rods of the two symmetrical groups of lifting cylinders are pin-connected to the fixing frame and the lifting frame respectively; The harrowing and loosening conveyor I and the harrowing and loosening conveyor II are suspended under the lifting frame in a relative manner; The cylinder body and piston rod of the sliding oil cylinder I are pin-connected to the lifting frame and the harrowing feeder I respectively; The cylinder body and piston rod of the sliding oil cylinder II are pin-connected to the lifting frame and the harrowing and loosening feeder II respectively.

5. According to claim 1, the in-situ hot regeneration unit capable of simultaneously realizing the removal of the aged layer and the lateral feeding is characterized in that: The vertical scraper conveyor of the heating rejector continuously conveys materials to the old asphalt aged layer transport vehicle located on the side lane, and the discharge height and length of the vertical scraper conveyor are matched with the silo of the old asphalt aged layer transport vehicle.

6. According to claim 1, the in-situ hot regeneration unit capable of simultaneously realizing the removal of the aged layer and the lateral feeding is characterized in that: The heating milling machine is used for heating and milling old asphalt pavement after removing the aging layer; the heating milling machine comprises a heating milling machine body, at least two groups of pavement heating walls are arranged at the lower front part of the heating milling machine body, a pavement milling device is arranged behind the pavement heating wall, a regeneration agent spraying device is arranged in front of the pavement milling device, and a recycled material heating wall is arranged behind the pavement milling device.

7. The in-situ hot regeneration unit capable of simultaneously removing the aged layer and adding material from the side according to claim 1 is characterized in that: The feeding and remixing machine is used for the continuous lateral addition of new asphalt mixture and the remixing of new and old asphalt mixtures; the feeding and remixing machine comprises a feeding and remixing machine body, the front part of which is provided with a lateral continuous feeding device, and the rear part of which is provided with a bottom stirring device, an inclined scraper lifting device and an upper stirring device in sequence.

8. The in-situ hot regeneration unit capable of simultaneously removing the aged layer and adding material from the side according to claim 7 is characterized in that: The lateral continuous feeding device of the feeding and remixing machine continuously feeds materials to the regeneration lane, and the material receiving height and length of the lateral continuous feeding device are matched with the material bin discharge port of the new asphalt mixture transport vehicle.

9. A construction method for an in-situ hot regeneration unit capable of simultaneously removing the aged layer and adding material from the side according to any one of claims 1 to 8, characterized in that: include: The old asphalt pavement is heated by a pavement heating wall of a hot air heater, the heating depth of the old asphalt pavement is a set first depth range value, the maximum temperature of the surface layer of the old asphalt pavement is less than or equal to a set first temperature threshold value, and the temperature at the first depth range value in the old asphalt pavement is greater than or equal to a set second temperature threshold value; Continue to heat the old asphalt pavement using the pavement heating wall of the heating rejector to ensure that the first depth range value and the second temperature threshold value meet the standards; The aged layer removal device of the heating removal machine is used to rake and loosen the asphalt aged layer of the first depth range of the heated old asphalt pavement, remove it and transport it laterally to form an aged layer material pile; the vertical scraping and conveying device of the heating removal machine is used to vertically lift the aged layer material pile and convey it laterally to the material bin of the old asphalt aged layer transport vehicle; the road surface heating wall and road surface insulation board behind the vertical scraping and conveying device respectively heat and insulate the old asphalt pavement after the aged layer is removed; The old asphalt pavement after the aging layer is removed is continuously heated by the pavement heating wall of the heating milling machine, the heating depth of the old asphalt pavement is the set second depth range value, the maximum temperature of the surface layer of the old asphalt pavement is less than or equal to the set second temperature threshold value, and the temperature at the second depth range value in the old asphalt pavement is greater than or equal to the set second temperature threshold value; then the regeneration agent spraying device of the heating milling machine is used to spray the heated old asphalt pavement with the regeneration agent, and then the pavement milling device is used to perform hot milling on the old asphalt pavement within the second depth range to form a regenerated material pile, the temperature of the regenerated material pile is greater than or equal to the third set temperature threshold value, and the regenerated material heating wall is used to divide, heat and aggregate the regenerated material pile to achieve secondary temperature increase of the regenerated material, so that the temperature of the regenerated material is greater than or equal to the fourth set temperature threshold value; The storage hopper of the lateral continuous feeding equipment of the feeder mixer is used to receive the new asphalt mixture delivered by the new asphalt mixture transport vehicle, and the accurate metering of the new asphalt mixture is achieved by controlling the horizontal scraper speed and the opening of the discharge door at the bottom of the storage hopper; the bottom stirring device of the feeder mixer is used to complete the first-stage mixing of the recycled material pile mixture and the new asphalt mixture and form a mixed material pile. When the temperature of the mixed material pile is lower than the set fifth temperature threshold, the hot air heating wall on the bottom stirring device is used to supplement the temperature of the mixed material; the inclined scraper lifting device continuously transports the mixed material pile to the upper stirring device, and the upper stirring device is used to complete the second-stage mixing of the recycled material pile mixture and the new asphalt mixture, and the mixed material is discharged into the receiving hopper of the paver. When the temperature of the mixed material is lower than the set sixth temperature threshold, the hot air heating wall on the upper stirring device is used to supplement the temperature of the mixed material. After heating, the average temperature of the mixed material is greater than or equal to the sixth temperature threshold; and then the paver completes the material distribution and paving pre-pressing.

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