Regeneration layer inter-layer thermal connection strengthening device, in-place thermal remixer, in-place thermal regeneration unit and construction process

Abstract

The invention discloses a regeneration layer inter-layer hot connection strengthening device, an in-place hot remixer, an in-place hot regeneration unit and a construction process, and belongs to the technical field of highway asphalt pavement regeneration equipment. The device comprises an enhancer spraying unit and a heating and temperature raising unit, the enhancer spraying unit comprises an enhancer tank body assembly and a spraying assembly; the enhancer tank body assembly is mounted on the frame and is connected with the spraying assembly through a corresponding pipeline; the spraying assembly is arranged below the tail part of the frame and is used for spraying an enhancer on the milled foundation layer; the heating and temperature raising unit comprises a liquid gas storage tank assembly and a heating wall assembly; the liquid gas storage tank assembly is arranged on one side of the frame and supplies gas to the heating wall assembly through a corresponding pipeline; the heating wall assembly is detachably arranged below the vehicle frame, located on one side of the spraying assembly and used for heating the sprayed foundation layer. Through precise reinforcing agent spraying and efficient heating treatment, the quality of the regenerated pavement is effectively improved, and the service life of the regenerated pavement is effectively prolonged.

Description

Technical Field

[0001] The invention relates to a regeneration layer interlayer thermal connection strengthening device, an on-site hot remixing machine, an on-site hot regeneration unit and a construction process, and belongs to the technical field of highway asphalt pavement regeneration equipment. Background Art

[0002] The in-situ hot regeneration unit, which is composed of several key equipment such as heating vehicles, milling machines, temperature raising machines and remixing machines, plays a vital role in modern road maintenance. However, this efficient construction system also faces a series of complex and severe challenges in practical operation, especially in terms of improving thermal insulation performance and strengthening roadbed structure.

[0003] Specifically, during the construction process of in-situ hot regeneration, the milling machine is responsible for accurately gathering the heated old pavement materials into a pile for subsequent processing. Although a series of insulation measures have been taken for the pile itself, such as covering with insulation materials, in order to slow down heat loss, unfortunately, these measures are inadequate in dealing with the problem of heating and heat preservation of the exposed surfaces on both sides of the unit's operating area and the pavement after the pile is lifted. These areas that are not fully insulated are directly exposed to the external environment, causing the pavement temperature to drop rapidly and the temperature loss phenomenon is relatively serious. When these insufficiently heated materials are used in subsequent paving operations, weak joints are easily formed between the newly laid recycled layer and the original base surface due to the failure to meet the ideal construction temperature standard. This structural weakness will greatly weaken the overall strength and durability of the recycled pavement, thereby significantly reducing its service life.

[0004] In addition, the current hot-in-situ regeneration technology has another major technical bottleneck, which is the lack of effective reinforcement means for the roadbed structure below the regeneration layer. Most construction manufacturers only focus on restoring the performance of the old materials in the regenerated layer after loosening, and improve their physical and chemical properties by adding regeneration agents, new asphalt and other materials, but ignore the reinforcement of the roadbed, a key infrastructure structure. In fact, the roots of many pavement diseases, such as cracks and settlement, are often deeply rooted in the roadbed, and the impact range of some diseases even exceeds the thickness of the regenerated layer. If regeneration operations are carried out directly on these roadbeds with potential problems, not only will the disease problem not be fundamentally solved, but it may accelerate the upward expansion of the disease, causing the regenerated layer to be quickly affected, the pavement performance to decline rapidly, and the life span to be greatly reduced.

[0005] In summary, the technical defects of the existing in-situ heat recycling technology in terms of insulation measures and roadbed reinforcement have become the key factors restricting its application effect and the improvement of road surface life. Therefore, it is urgent to develop a new and effective equipment and construction process for strengthening the thermal connection between the recycled layers to specifically solve the relevant technical defects faced by the existing technology. Summary of the invention

[0006] The purpose of the present invention is to provide a regenerated layer interlayer thermal connection strengthening device, an on-site hot remixing machine, an on-site hot regeneration unit and a construction process, aiming to solve the problems of insufficient interlayer bonding strength and the restoration of defects to the regenerated layer in on-site hot regeneration construction through the dual effects of precise spraying of strengthening agents and efficient heating and temperature raising, thereby significantly improving the structural stability and service life of the regenerated pavement.

[0007] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a device for strengthening the thermal connection between regeneration layers, which comprises: a strengthening agent spraying unit and a heating and temperature raising unit connected to a frame of an in-situ heating remixer; The fortifier spraying unit comprises: a fortifier tank assembly and a spraying assembly; The strengthening agent tank assembly is installed on the frame and connected to the spraying assembly through a strengthening agent pipeline; the spraying assembly is installed below the tail of the frame through a first connecting component, and is used to spray the strengthening agent on the milled ground base; The heating and temperature raising unit comprises: a liquefied gas tank assembly and a heating wall assembly; The liquefied gas tank assembly is installed on one side of the frame and is connected to the heating wall assembly through a liquefied gas pipeline; the heating wall assembly is detachably installed under the frame through a second connecting assembly and is located on one side of the spraying assembly, and is used to heat and raise the temperature of the base layer after being sprayed with the enhancer.

[0008] Optionally, the first connecting component includes: a first telescopic arm body and a second telescopic arm body that are symmetrically distributed; the spraying assembly includes: a first spraying assembly and a second spraying assembly that are respectively arranged perpendicular to the first telescopic arm body and the second telescopic arm body; The first telescopic arm and the second telescopic arm each include: a moving portion and a fixed portion; wherein the top ends of the fixed portions of the first telescopic arm and the second telescopic arm are both fixedly connected to the vehicle frame, and the bottom ends of the moving portions of the first telescopic arm and the second telescopic arm are respectively fixedly connected to the first spray assembly and the second spray assembly; The first spraying assembly and the second spraying assembly are both provided with a plurality of spraying ports, and the strengthening agent tank assembly is connected with the spraying ports, and is used to control and deliver the strengthening agent to each of the spraying ports through corresponding pipe valves, so as to spray the milled ground base; In the working state, the movable parts of the first telescopic arm and the second telescopic arm are driven by the oil cylinder to descend to a first preset height from the ground layer relative to the fixed parts of the first telescopic arm and the second telescopic arm to perform the spraying operation; In the transport state, the movable parts of the first telescopic arm and the second telescopic arm are driven by the oil cylinder to rise to a second preset height from the ground layer relative to the fixed parts of the first telescopic arm and the second telescopic arm to transfer the entire vehicle.

[0009] Optionally, the second connection assembly includes: a first paver push wheel frame, a second paver push wheel frame, a first connection frame and a second connection frame; the heating wall assembly includes: a first heating wall assembly, a second heating wall assembly and a third heating wall assembly; The first paver push wheel frame and the second paver push wheel frame are symmetrically arranged at the bottom of the frame and are connected to each other through the paver top push frame; the third heating wall assembly is arranged directly below the paver top push frame and is fixedly connected to the paver top push frame through a fixing seat, and is used to heat and raise the temperature of the middle ground layer corresponding to the material ridge coverage area; A group of concentric hinge seats and support plates are sequentially arranged on one side of the first and second paver push wheel frames in the vertical direction, and two vertical limiting holes are arranged on the support plates with the concentric point as the center of the circle; the first connecting frame and the second connecting frame are set as triangular connecting frames, each comprising: a vertical frame part, a horizontal frame part and an oblique frame part connected to each other; Among them, the vertical frame parts of the first connecting frame and the second connecting frame are rotatably connected to one side of the first paver push wheel frame and the second paver tug wheel frame through the hinge seat respectively; one end of the horizontal frame part of the first connecting frame and the second connecting frame is connected to the limiting hole through a connecting frame limiting pin for realizing circumferential limiting, and the other end is connected to the first heating wall assembly and the second heating wall assembly through a group of vertical plate connecting assemblies.

[0010] Optionally, the limiting hole includes: a first limiting hole and a second limiting hole; In the working state, one end of the cross frame part of the first connecting frame and the second connecting frame is fixedly connected to the first limiting hole through the connecting frame limiting pin, and the first connecting frame and the second connecting frame are perpendicular to the driving direction; the first heating wall assembly and the second heating wall assembly respectively connected to the other end of the cross frame part of the first connecting frame and the second connecting frame heat and raise the temperature of the ground layers on both sides corresponding to the non-covered area of ​​the material ridge; In the transport state, one end of the cross frame portion of the first connecting frame and the second connecting frame is fixedly connected to the second limiting hole through a connecting frame limiting pin, and the first connecting frame and the second connecting frame are both parallel to the driving direction.

[0011] Optionally, the first heating wall assembly and the second heating wall assembly both include: a first heating wall frame, a first heating module, a second heating module and a sealing plate; One side of the first heating wall frame is fixedly connected to the corresponding cross frame portion of the first connecting frame or the second connecting frame through a vertical plate connecting assembly, and the first heating module, the sealing plate and the second heating module are sequentially installed in the first heating wall frame; The inlets of the first heating module and the second heating module are connected to the outlet of the liquefied gas tank assembly through corresponding liquefied gas pipelines, and the two heating modules are individually controllable; in the working state, according to the actual temperature of the ground base layers on both sides, the first heating module and / or the second heating module are controlled to heat and raise the temperature of the ground base layer after being sprayed with the enhancer.

[0012] Optionally, the sealing plate includes an upper and lower sealing plate, and thermal insulation cotton is filled between the two sealing plates.

[0013] Optionally, the third heating wall assembly includes: a second heating wall frame, and several groups of third heating modules arranged in sequence in the second heating wall frame; the top of the second heating wall frame is fixedly connected to the paver top push frame through a group of symmetrically arranged fixing seats.

[0014] Optionally, skirt cloths are installed around the first heating wall frame and the second heating wall frame to prevent hot air from escaping during the heating process.

[0015] Optionally, a plurality of hollow rings are welded on the sides of the first heating wall frame and the second heating wall frame, the skirt cloth and the pressure plate are sequentially covered on the outer circumference of the hollow rings, and the skirt cloth is fixed to the circumference of the first heating wall frame and the second heating wall frame by R-shaped pins.

[0016] Optionally, the vertical plate connection assembly includes: a first vertical plate, a second vertical plate, a limit pin, a retaining ring and an R-shaped pin arranged in parallel; The first vertical plate is fixedly connected to the cross frame; one end of the second vertical plate is fixedly connected to one side of the first heating wall frame, and the other end is inserted into the middle of the two first vertical plates and is hinged in sequence through the limit pin, the retaining ring and the R-shaped pin; wherein the corresponding hinge hole on the first vertical plate is an oblong hole, which is used to enable the first heating wall assembly and the second heating wall assembly to be adaptively adjusted in the vertical direction within the oblong hole.

[0017] Optionally, a group of first sliding members is installed on one side of the first heating wall frame, and a second sliding assembly is installed on the other side for providing support; the second sliding assembly includes: a first mounting plate, a second mounting plate, a connecting column and a second sliding member; the upper end of the second sliding member is fixedly connected to the second mounting plate; the lower end of the connecting column is welded to the second connecting plate, and the upper and lower end surfaces of the first mounting plate are each connected to the connecting column through a nut; If the first sliding member is on an unmilled road surface and the second sliding assembly is on a milled road surface, the second mounting plate and the second sliding member are adjusted by nuts to move in a vertical direction so that the first heating wall assembly and / or the second heating wall assembly as a whole are parallel to the milled road surface.

[0018] Optionally, two sets of the second sliding components are respectively installed on both sides of the second heating wall frame; In the working state, the second mounting plate and the second sliding member are adjusted to the upper limit position by the nut, so that the third heating wall assembly moves with the entire vehicle; in the transport state, the second mounting plate and the second sliding member are adjusted to the lower limit position by the nut to complete the transfer.

[0019] In a second aspect, the present invention further provides an in-situ hot remixing machine, which comprises: a frame, a hopper assembly, a central bottom mixing cylinder, an inclined material lifting device, a top mixing cylinder, and a regeneration layer interlayer thermal connection strengthening device as described in the first aspect; The hopper assembly is used to receive new asphalt delivered by the feed truck and to deliver the new asphalt to the old asphalt obtained after milling; the middle bottom mixing cylinder is used to stir and heat the mixture composed of the new asphalt and the old asphalt; the middle bottom mixing cylinder is connected to the top mixing cylinder through the inclined lifting device.

[0020] In a third aspect, the present invention further provides an on-site hot regeneration unit, which comprises: a plurality of on-site heating vehicles, an on-site heating milling vehicle, an on-site heating temperature raising machine, a material vehicle, a paver, a roller, and the on-site hot remixing machine described in the second aspect; The on-site heating vehicle is used to heat the asphalt pavement; the on-site heating milling vehicle is used to mill the heated asphalt pavement, and to peel off the old asphalt material on the surface and gather it into material ridges; the on-site heating temperature raising machine is used to raise the temperature of the old asphalt material after milling; the material vehicle is used to transport the new asphalt material to the hopper assembly of the on-site hot remixer; the push wheel of the paver is in contact with the first paver push wheel frame and the second paver push wheel frame provided on the on-site hot remixer frame, and is used to spread and smooth the mixture output from the top mixing cylinder outlet; the roller is used to compact the asphalt pavement after spreading and smoothing.

[0021] In a fourth aspect, the present invention further provides a construction process, which is performed by the in-situ heat regeneration unit described in the third aspect, and comprises the following steps: Several on-site heating vehicles heat the asphalt pavement; on-site heating milling vehicles mill the heated asphalt pavement, and peel off the old asphalt material on the surface and gather it into material ridges; on-site heating temperature raising machines raise the temperature of the old asphalt material after milling; the hopper assembly of the on-site hot remixer receives the new asphalt material delivered by the material vehicle, and delivers the new asphalt material to the old asphalt material obtained after milling to form a mixture; The middle bottom mixing cylinder of the on-site hot remixer collects the mixed material into the cylinder for stirring and heating, and transports the stirred and heated mixed material to the top mixing cylinder through the inclined material lifting device; in this process, the strengthening agent spraying unit of the on-site hot remixer sprays the strengthening agent on the milled base layer, and the heating and temperature raising unit of the on-site hot remixer heats and raises the temperature of the base layer after the strengthening agent spraying treatment; The paver spreads and smoothes the mixture output from the top mixing cylinder outlet; the roller compacts the asphalt pavement after spreading and smoothing.

[0022] Compared with the prior art, the present invention has the following beneficial effects: By precisely spraying the strengthening agent, the present invention effectively repairs minor diseases extending below the regenerated surface, and strengthens the performance of the aged asphalt of the base layer, thereby greatly extending the service life of the regenerated pavement. At the same time, the heating and temperature raising treatment reduces the temperature difference between the regenerated layer and the base layer, improves the interlayer bonding quality, and makes the regenerated pavement more durable; secondly, the heating wall of the present invention can be configured with different lengths and widths according to needs, and has strong adaptability; thirdly, the spraying device and the heating device of the present invention can be adjusted by a telescopic arm or a sliding component, which is convenient for flexible operation during the construction process and improves the construction efficiency; in addition, during the working process, the present invention can control the start and stop of each heating unit separately according to the road surface temperature, and the unheated heating unit acts as an insulation board, which effectively reduces energy consumption, and the skirt cloth design of the heating wall assembly also prevents hot air from overflowing, further improving the energy utilization efficiency. In short, the regenerated pavement treated by the device provided by the present invention not only has improved water sealing and integrity, but also has significantly enhanced anti-deformation ability, which makes the regenerated pavement more stable and reliable when bearing heavy loads and high-frequency traffic loads, reducing the repair and maintenance costs of the pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure shows the overall structure schematic diagram of the in-situ hot compound mixer of the present invention; Figure 2 The figure shows the structure schematic diagram of the strengthening agent spraying unit in the regeneration layer interlayer thermal connection strengthening device of the present invention; Figure 3 It is a schematic structural diagram of a heating and temperature raising unit in a device for strengthening the interlayer thermal connection of a regeneration layer according to the present invention; Figure 4It is a schematic structural diagram of the second connection assembly in the device for strengthening the interlayer thermal connection of the regeneration layer of the present invention; Figure 5 It is a schematic structural diagram of the first / second paver push wheel frame and related connecting parts in the device for strengthening the interlayer thermal connection of the regeneration layer of the present invention; Figure 6 It is a schematic structural diagram of the first / second heating wall assembly in the device for strengthening the interlayer thermal connection of the regeneration layer of the present invention; Figure 7 It is a schematic structural diagram of the third heating wall assembly in the device for strengthening the interlayer thermal connection of the regeneration layer of the present invention; Figure 8 Shown Figure 3 A partial enlarged view of the middle A; In the figure: 1-frame; 2-hopper assembly; 3-middle bottom mixing cylinder; 4-inclined lifting device; 5-top mixing cylinder; 6-regeneration layer interlayer thermal connection strengthening device; 7-strengthening agent tank assembly; 8-liquefied gas tank assembly; 9-first telescopic arm; 10-second telescopic arm; 11-first spraying assembly; 12-second spraying assembly; 13-spraying port; 14-first paver push wheel frame; 15-second paver push wheel frame; 16-first connecting frame; 17-second connecting frame; 18-first heating wall assembly; 19-second heating wall assembly; 20-third heating wall assembly; 21-fixed seat; 22 - hinged seat; 23-support plate; 24-connecting frame limit pin; 25-vertical plate connecting assembly; 26-first limit hole; 27-second limit hole; 28-first heating wall frame; 29-first heating module; 30-second heating module; 31-sealing plate; 32-second heating wall frame; 33-skirt cloth; 34-pressing plate; 35-first sliding member; 36-first mounting plate; 37-second mounting plate; 38-connecting column; 39-second sliding member; 40-paver push frame; 41-third heating module; 41-first vertical plate; 42-second vertical plate; 43-limit pin; 44-R-type pin. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0025] The term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the associated objects are in an "or" relationship.

[0026] Example 1 refer to Figures 1 to 4 , this embodiment introduces a regeneration layer interlayer thermal connection strengthening device, which includes: a strengthening agent spraying unit and a heating and temperature raising unit connected to the frame of the in-situ heating remixing machine; The strengthening agent spraying unit comprises: a strengthening agent tank assembly 7 and a spraying assembly; The strengthening agent tank assembly 7 is installed on the frame 1 and connected to the spraying assembly through a strengthening agent pipeline; the spraying assembly is installed below the tail of the frame 1 through a first connecting component, and is used to spray the strengthening agent on the milled ground base; The heating and temperature raising unit comprises: a liquefied gas tank assembly 8 and a heating wall assembly; The liquefied gas tank assembly 8 is installed on one side of the frame 1 and is connected to the heating wall assembly through a liquefied gas pipeline; the heating wall assembly is detachably installed under the frame 1 through a second connecting assembly and is located on one side of the spraying assembly, and is used to heat and raise the temperature of the base layer after being sprayed with the strengthening agent, so as to form an interlayer gradation transition zone in which the recycled aggregate and the roadbed aggregate are embedded with each other.

[0027] In the actual application of this embodiment, the strengthening agent spraying unit in the device can accurately control the spraying amount and range of the strengthening agent, wherein the strengthening agent is designed to enhance the bonding force between the regenerated layer and the base layer, and is sprayed on the surface of the base layer after milling to form a strengthening layer, which helps to improve the overall structural strength of the regenerated pavement. Immediately after the strengthening agent is sprayed, the heating and temperature raising unit uses the fuel provided by the liquefied gas tank assembly 8 to heat the base layer sprayed with the strengthening agent through the heating wall assembly. This process not only accelerates the penetration and curing of the strengthening agent, but also promotes the thermal connection between the base layer and the regenerated layer, ensuring that the two achieve a better fusion state at the molecular level, thereby further enhancing the interlayer bonding force.

[0028] In general, the strengthening agent spraying unit and the heating and temperature raising unit are integrated on the frame of the in-situ heating remixer, which realizes the continuous operation of spraying strengthening agent and heating and temperature raising, and significantly improves the construction efficiency. At the same time, the precise strengthening agent spraying and efficient heating and temperature raising also ensure the formation of a firm thermal connection between the regenerated layer and the base layer, so that the overall quality and durability of the regenerated pavement are effectively improved.

[0029] Example 2 Reference 1 to Figure 8 Based on Example 1, this example will introduce in detail the structural composition and related function realization process of the regeneration layer interlayer thermal connection strengthening device, as described below.

[0030] like Figure 2As shown, the first connection assembly includes: a symmetrically distributed first telescopic arm body 9 and a second telescopic arm body 10. The spraying assembly includes: a first spraying assembly 11 and a second spraying assembly 12 respectively arranged perpendicular to the first telescopic arm body 9 and the second telescopic arm body 10, to ensure that the spraying range can cover the required area.

[0031] The first telescopic arm body 9 and the second telescopic arm body 10 both include: a moving part and a fixed part. Specifically, the top ends of the fixed parts of the first telescopic arm body 9 and the second telescopic arm body 10 are fixedly connected to the frame 1, providing a stable support base for the entire spraying assembly. The bottom ends of the moving parts of the first telescopic arm body 9 and the second telescopic arm body 10 are respectively fixedly connected to the first spraying assembly 11 and the second spraying assembly 12, and are driven up and down by the cylinder. Through the design of the telescopic arm body, the height of the spraying assembly can be adjusted according to actual needs, which not only meets the spraying accuracy requirements during operation, but also facilitates spatial adaptability during transportation.

[0032] The first spray assembly 11 and the second spray assembly 12 are both provided with a plurality of spray ports 13, and the strengthening agent tank assembly 7 is connected to the spray ports 13, and is used to control and deliver the strengthening agent to each of the spray ports 13 through a corresponding pipe valve, so as to spray the milled ground base. The provision of a plurality of spray ports 13 ensures that the strengthening agent can be evenly sprayed on the ground base, thereby improving the operation efficiency and the spraying effect.

[0033] In the working state, the construction workers use the oil cylinder to drive the moving parts of the first telescopic arm body 9 and the second telescopic arm body 10 to descend to a first preset height from the ground layer relative to the fixed parts of the first telescopic arm body 9 and the second telescopic arm body 10 to perform spraying operations. The first preset height ensures that the spraying assembly can be close to the ground to achieve accurate and uniform spraying operations.

[0034] In the transport state, construction workers use the oil cylinder to drive the moving parts of the first telescopic arm 9 and the second telescopic arm 10 to rise to a second preset height from the ground layer relative to the fixed parts of the first telescopic arm 9 and the second telescopic arm 10 to transfer the entire vehicle. The second preset height is usually higher than the working state to avoid collision with the ground or obstacles during transportation.

[0035] In actual application, the design of the above-mentioned first connecting component and its related components fully considers the operating efficiency and safety. Through the flexible telescopic arm and precise spraying assembly configuration, the effective spraying of the enhancer and the convenient transportation of the equipment are realized, and it is highly practical.

[0036] like Figure 3 and Figure 4As shown, the second connection assembly includes: a first paver push wheel frame 14, a second paver push wheel frame 15, a first connection frame 16 and a second connection frame 17. The heating wall assembly includes: a first heating wall assembly 18, a second heating wall assembly 19 and a third heating wall assembly 20.

[0037] The first paver push wheel frame 14 and the second paver push wheel frame 15 are symmetrically arranged at the bottom of the frame 1 and are connected to each other through the paver top push frame 40. In actual application, the first paver push wheel frame 14 and the second paver push wheel frame 15 are used to abut against the push frame of the subsequent paver to maintain a certain construction distance.

[0038] The third heating wall assembly 20 is disposed directly below the paver top push frame 40 and is fixedly connected to the paver top push frame 40 via a fixing seat 21, and is used to heat and raise the temperature of the middle ground layer corresponding to the material ridge coverage area.

[0039] like Figure 5 As shown, one side of the first spreading machine push wheel frame 14 and the second spreading machine push wheel frame 15 is sequentially provided with a group of concentric hinge seats 22 and support plates 23 in the vertical direction, and two vertical limiting holes are arranged on the support plate 23 with the concentric point as the center of the circle.

[0040] The first connecting frame 16 and the second connecting frame 17 are configured as triangular connecting frames, each comprising: a vertical frame portion, a horizontal frame portion and an oblique frame portion connected to each other. The vertical frame portions of the first connecting frame 16 and the second connecting frame 17 are respectively rotatably connected to one side of the first paver push wheel frame 14 and the second paver pull wheel frame 15 through the hinge seat 22, allowing the connecting frame to rotate within a certain range. One end of the horizontal frame portion of the first connecting frame 16 and the second connecting frame 17 is connected to the limiting hole through a connecting frame limiting pin 24 for realizing circumferential limiting, and the other end is respectively connected to the first heating wall assembly 18 and the second heating wall assembly 19 through a set of vertical plate connecting assemblies 25.

[0041] Specifically, the limiting holes include: a first limiting hole 26 and a second limiting hole 27. In the working state, one end of the cross frame of the first connecting frame 16 and the second connecting frame 17 is fixedly connected to the first limiting hole 26 through the connecting frame limiting pin 24, and the first connecting frame 16 and the second connecting frame 17 are perpendicular to the driving direction; the first heating wall assembly 18 and the second heating wall assembly 19 respectively connected to the other end of the cross frame of the first connecting frame 16 and the second connecting frame 17 heat the ground layers on both sides corresponding to the non-covered area of ​​the material ridge.

[0042] In the transport state, one end of the cross frame of the first connecting frame 16 and the second connecting frame 17 is fixedly connected to the second limiting hole 27 through the connecting frame limiting pin 24, and the first connecting frame 16 and the second connecting frame 17 are parallel to the driving direction to avoid the connecting frame opening in the construction working width to cause obstacles. At the same time, the first heating wall assembly 18 and the second heating wall assembly 19 respectively installed on the first connecting frame 16 and the second connecting frame 17 will be disassembled to reduce the volume and weight during transportation and facilitate movement.

[0043] like Figure 6 As shown, the first heating wall assembly 18 and the second heating wall assembly 19 both include: a first heating wall frame 28, a first heating module 29, a second heating module 30 and a sealing plate 31. The sealing plate 31 includes two upper and lower sealing plates, and the space between the two sealing plates is filled with thermal insulation cotton to reduce heat loss and improve heating efficiency. In addition, the sealing plate not only plays the role of sealing the heating space, but also supports the heating module through its structural strength to ensure the stability of the entire heating wall assembly.

[0044] One side of the first heating wall frame 28 is fixedly connected to the corresponding cross frame portion of the first connecting frame 16 or the second connecting frame 17 through the vertical plate connecting assembly 25. The first heating wall frame 28 is the main structure of the assembly, responsible for supporting and fixing the internal heating module and the sealing plate 31, and the first heating module 29, the sealing plate 31 and the second heating module 30 are installed in the frame in sequence.

[0045] The inlets of the first heating module 29 and the second heating module 30 are connected to the outlet of the liquefied gas tank assembly 8 through corresponding liquefied gas pipelines. At the same time, these two heating modules can be controlled separately, and one or both can be turned on according to actual needs to improve energy utilization efficiency.

[0046] In the working state, according to the actual temperature of the foundation layers on both sides, the control system can selectively turn on the first heating module 29 and / or the second heating module 30 to heat and raise the temperature of the foundation layer after being sprayed with the strengthening agent.

[0047] In actual application, the first heating wall assembly 18 and the second heating wall assembly 19 achieve accurate heating and temperature raising of the base layers on both sides through their ingenious design. The individual controllability of the heating module, the insulation effect of the sealing plate 31 and the insulation cotton, and the efficient gas supply of the liquefied gas pipeline together constitute an efficient and flexible heating system. This system not only improves construction efficiency and quality, but also effectively reduces energy consumption and environmental pollution.

[0048] like Figure 7As shown, the third heating wall assembly 20 includes: a second heating wall frame 32, and a plurality of groups of third heating modules 41 arranged in sequence in the second heating wall frame; the top of the second heating wall frame 32 is fixedly connected to the paver top push frame 40 through a group of symmetrically arranged fixing seats 21. The third heating wall assembly 20 is mainly used to heat and raise the temperature of the ground base on both sides corresponding to the material ridge coverage area.

[0049] It is worth mentioning that the reference Figure 3 In this embodiment, the third heating wall assembly 20 in the middle, the first heating wall assembly 18 on the left, and the second heating wall assembly 19 on the right work together to ensure that the road surface in different areas can reach the temperature required for the operation. Specifically, the third heating wall assembly 20 is located in the center of the driving direction, that is, below the material ridge. The length is relatively short because the area is covered by the material ridge, the exposure time is short, and the temperature loss is relatively small. Although the temperature loss is small, the middle heating wall still plays a key heating role, ensuring that the road surface under the material ridge can reach the temperature required for the operation. Its shorter length design not only meets the heating needs, but also avoids unnecessary energy consumption. Correspondingly, the first / second heating wall assemblies are located on both sides of the lane, that is, on both sides of the material ridge. The length is relatively long because the exposure time of the roadbed on both sides is long and the temperature loss is large. The left and right heating walls are key components in the device, and they heat the roadbed on both sides with large temperature loss for a long time and efficiently. By extending the length of the heating wall, a wider heating area can be ensured, thereby increasing the overall temperature of the road surface.

[0050] Furthermore, the first heating wall frame 28 and the second heating wall frame 32 are both provided with skirt cloth 33 around their circumferences to prevent the hot air from escaping during the heating process. Specifically, a plurality of hollow rings are welded on the sides of the first heating wall frame 28 and the second heating wall frame 32, and the outer circumferences of the hollow rings are covered with the skirt cloth 33 and the pressing plate 34 in sequence, and the skirt cloth 33 is fixed to the circumferences of the first heating wall frame 28 and the second heating wall frame 32 by R-shaped pins.

[0051] like Figure 8 As shown, the vertical plate connection assembly 25 includes: a first vertical plate 41, a second vertical plate 42, a limit pin 43, a retaining ring and an R-shaped pin 44 which are arranged in parallel.

[0052] The first vertical plate 41 is fixedly connected to the cross frame; one end of the second vertical plate 42 is fixedly connected to one side of the first heating wall frame 28, and the other end is inserted into the middle of the two first vertical plates 41 and is hinged in sequence through the limit pin 43, the retaining ring and the R-shaped pin 44; wherein, the corresponding hinge hole on the first vertical plate 41 is an oblong hole, which is used to enable the first heating wall assembly 18 and the second heating wall assembly 19 to realize adaptive adjustment in the vertical direction in the oblong hole.

[0053] A set of first sliding members 35 are installed on one side of the first heating wall frame 28, and a second sliding assembly is installed on the other side for providing support. The second sliding assembly includes: a first mounting plate 36, a second mounting plate 37, a connecting column 38 and a second sliding member 39; the upper end of the second sliding member 39 is fixedly connected to the second mounting plate 37; the lower end of the connecting column 38 is welded to the second connecting plate 37, and the upper and lower end surfaces of the first mounting plate 36 are each connected to the connecting column 38 through a nut.

[0054] If the first sliding member 35 is on the unmilled road surface and the second sliding member is on the milled road surface, the second mounting plate and the second sliding member 39 are adjusted by the nut to move in the vertical direction, so that the first heating wall assembly 18 and / or the second heating wall assembly 19 are parallel to the milled road surface. This adjustment mechanism enables the first heating wall assembly 18 (similarly applicable to the second heating wall assembly 19) to remain parallel to the milled road surface, ensuring uniform heating effect and construction quality.

[0055] It is also worth noting that the reason why the hinge hole in the first vertical plate 41 is set as an oblong hole is to be able to cooperate with the second sliding component to achieve height adjustment while driving the corresponding heating wall component to achieve adaptive adjustment in the vertical direction. This process is flexible, reliable and practical. In other words, the design of the oblong hole cooperates with the height adjustment function of the second sliding component, so that the entire heating wall component can be flexibly adjusted according to the height changes of different road surfaces, ensuring stability and heating efficiency during construction.

[0056] Two sets of the second sliding components are respectively installed on both sides of the second heating wall frame 32. In the working state, the second mounting plate 37 and the second sliding member 39 are adjusted to the upper limit position by the nut, so that the third heating wall assembly 20 moves with the whole vehicle; in the transportation state, the second mounting plate 37 and the second sliding member 39 are adjusted to the lower limit position by the nut to complete the transfer. In other words, the second sliding components set on both sides of the second heating wall frame can move with the whole vehicle in the working state, and can provide support in the transportation state to facilitate transportation.

[0057] Example 3 refer to Figure 1 The present embodiment provides an on-site hot remixing machine, which includes: a frame 1, a hopper assembly 2, a central bottom mixing cylinder 3, an inclined lifting device 4, a top mixing cylinder 5, and a regeneration layer interlayer thermal connection strengthening device 6 as described in Example 1 or 2.

[0058] Specifically, the hopper assembly 2 is used to receive new asphalt delivered by the material truck, and to deliver the new asphalt to the old asphalt obtained after milling; the middle bottom mixing cylinder 3 is used to stir and heat the mixture composed of the new asphalt and the old asphalt; the middle bottom mixing cylinder 3 is connected to the top mixing cylinder 5 through the inclined lifting device 4.

[0059] The in-situ hot remixing machine provided in this embodiment is a road construction equipment that integrates multiple functions. It receives new asphalt material and combines, mixes and heats it with old asphalt material to achieve rapid regeneration and repair of old asphalt pavement. The equipment has the advantages of high efficiency, reliable quality, flexibility and environmental protection, and can be applied to different road conditions and construction environments.

[0060] Example 4 The on-site hot regeneration unit provided in this embodiment is a road construction equipment combination that integrates multiple functions, including: multiple on-site heating vehicles, on-site heating milling vehicles, on-site heating temperature raising machines, material vehicles, pavers, rollers, and on-site hot remixing machines as described in Example 3. Through collaborative operation, it realizes rapid, efficient and environmentally friendly regeneration and repair of old asphalt pavement.

[0061] Specifically, the on-site heating vehicle is used to heat the asphalt pavement; the on-site heating milling vehicle is used to mill the heated asphalt pavement, and to peel off the old asphalt material on the surface and gather it into material ridges; the on-site heating temperature raising machine is used to raise the temperature of the old asphalt material after milling; the material vehicle is used to transport the new asphalt material to the hopper assembly 2 of the on-site hot remixer; the push wheel of the paver is in contact with the first paver push wheel frame 14 and the second paver push wheel frame 15 provided on the on-site hot remixer frame, and is used to spread and smooth the mixture output from the discharge port of the top mixing cylinder 5; the roller is used to compact the asphalt pavement after spreading and smoothing.

[0062] Example 5 The construction process provided in this embodiment is performed by the in-situ hot regeneration unit described in Example 4, aiming to achieve rapid, efficient and environmentally friendly regeneration and repair of old asphalt pavement. The process is carried out through a series of orderly steps to mix, stir, heat, spread and compact the old asphalt material with the new asphalt material, and finally obtain a regenerated pavement with reliable quality. Specifically, the following steps are included: Several on-site heating vehicles heat the asphalt pavement; on-site heating milling vehicles mill the heated asphalt pavement, and peel off the old asphalt material on the surface and gather it into material ridges; on-site heating temperature raising machines raise the temperature of the old asphalt material after milling; the hopper assembly 2 of the on-site hot remixer receives the new asphalt material transported by the material vehicle, and transports the new asphalt material onto the old asphalt material obtained after milling to form a mixture; The middle bottom mixing cylinder 3 of the in-situ hot remixer collects the mixture into the cylinder for stirring and heating, and transports the stirred and heated mixture to the top mixing cylinder 5 through the inclined material lifting device; after the mixture is transported away, there is no mixture on the foundation surface. At this time, the strengthening agent spraying unit of the in-situ hot remixer evenly sprays the strengthening agent on the clean foundation surface. The strengthening agent can fill and strengthen the performance of the weak diseases extending from the road surface of the diseased layer (for example, cracks extending to the micro cracks in the foundation) and the aged asphalt of the foundation. At the same time, the heating and temperature raising unit of the in-situ hot remixer further heats and raises the temperature of the foundation after the strengthening agent spraying treatment, ensuring that the temperature of the foundation is appropriate, providing convenience for subsequent paving and compaction operations; The paver is followed by the hot remixer. The hopper of the paver is located below the discharge port of the top mixing cylinder 5. The recycled mixture falls into the paver through the discharge port of the top mixing cylinder 5 for paving and smoothing, and then a roller follows to compact the road surface.

[0063] In the description of the present disclosure / application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present disclosure / application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure / application.

[0064] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this disclosure / application, unless otherwise specified, "plurality" means two or more.

[0065] In the description of this disclosure / application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure / application can be understood according to specific circumstances.

[0066] The above is only a preferred implementation of the present disclosure / application. 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 disclosure / application, and these improvements and modifications should also be regarded as the scope of protection of the present disclosure / application.

Claims

1. A device for strengthening the thermal connection between regeneration layers, characterized in that: include: A strengthening agent spraying unit and a heating and temperature raising unit connected to the frame of the in-situ heating remixer; The fortifier spraying unit comprises: a fortifier tank assembly (7) and a spraying assembly; The strengthening agent tank assembly (7) is mounted on the vehicle frame (1) and connected to the spraying assembly via a strengthening agent pipeline; the spraying assembly is mounted below the rear end of the vehicle frame (1) via a first connecting assembly and is used to spray the strengthening agent on the milled ground base; The heating and temperature raising unit comprises: a liquefied gas tank assembly (8) and a heating wall assembly; The liquefied gas tank assembly (8) is mounted on one side of the vehicle frame (1) and is connected to the heating wall assembly via a liquefied gas pipeline; the heating wall assembly is detachably mounted below the vehicle frame (1) via a second connecting assembly and is located on one side of the spraying assembly, and is used to heat and raise the temperature of the ground base after being sprayed with the strengthening agent.

2. The device for strengthening thermal connection between regeneration layers according to claim 1, characterized in that: The first connection component comprises: a first telescopic arm body (9) and a second telescopic arm body (10) which are symmetrically distributed; the spraying assembly comprises: a first spraying assembly (11) and a second spraying assembly (12) which are respectively arranged perpendicular to the first telescopic arm body (9) and the second telescopic arm body (10); The first telescopic arm (9) and the second telescopic arm (10) both comprise: a moving part and a fixed part; wherein the top ends of the fixed parts of the first telescopic arm (9) and the second telescopic arm (10) are both fixedly connected to the vehicle frame (1), and the bottom ends of the moving parts of the first telescopic arm (9) and the second telescopic arm (10) are respectively fixedly connected to the first spraying assembly (11) and the second spraying assembly (12); The first spraying assembly (11) and the second spraying assembly (12) are both provided with a plurality of spraying ports (13), and the strengthening agent tank assembly (7) is in communication with the spraying ports (13) and is used to control and deliver the strengthening agent to each of the spraying ports (13) through a corresponding pipe valve, so as to spray the milled ground base; In the operation state, the movable parts of the first telescopic arm (9) and the second telescopic arm (10) are driven by the oil cylinder to descend to a first preset height from the ground layer relative to the fixed parts of the first telescopic arm (9) and the second telescopic arm (10) to perform the spraying operation; in the transportation state, the movable parts of the first telescopic arm (9) and the second telescopic arm (10) are driven by the oil cylinder to rise to a second preset height from the ground layer relative to the fixed parts of the first telescopic arm (9) and the second telescopic arm (10) to perform the whole vehicle transportation.

3. The device for strengthening thermal connection between regeneration layers according to claim 1, characterized in that: The second connection assembly comprises: a first paver push wheel frame (14), a second paver push wheel frame (15), a first connection frame (16) and a second connection frame (17); the heating wall assembly comprises: a first heating wall assembly (18), a second heating wall assembly (19) and a third heating wall assembly (20); The first paver push wheel frame (14) and the second paver push wheel frame (15) are symmetrically arranged at the bottom of the frame (1) and are connected to each other via a paver top push frame (40); the third heating wall assembly (20) is arranged directly below the paver top push frame (40) and is fixedly connected to the paver top push frame (40) via a fixing seat (21) and is used to heat and raise the temperature of the middle ground layer corresponding to the material ridge coverage area; A group of concentric hinge seats (22) and a support plate (23) are sequentially provided on one side of the first paving machine push wheel frame (14) and the second paving machine push wheel frame (15) in the vertical direction, and two vertical limiting holes are arranged on the support plate (23) with the concentric point as the center of the circle; the first connecting frame (16) and the second connecting frame (17) are configured as triangular connecting frames, each comprising a vertical frame portion, a horizontal frame portion and an oblique frame portion connected to each other; The vertical frame parts of the first connecting frame (16) and the second connecting frame (17) are rotatably connected to one side of the first paver push wheel frame (14) and the second paver pull wheel frame (15) respectively through the hinge seat (22); one end of the horizontal frame parts of the first connecting frame (16) and the second connecting frame (17) is connected to the limiting hole through a connecting frame limiting pin (24) for achieving circumferential limiting, and the other end is connected to the first heating wall assembly (18) and the second heating wall assembly (19) respectively through a set of vertical plate connecting assemblies (25).

4. The device for strengthening thermal connection between regeneration layers according to claim 3, characterized in that: The limiting holes include: a first limiting hole (26) and a second limiting hole (27); In the working state, one end of the cross frame portion of the first connecting frame (16) and the second connecting frame (17) is fixedly connected to the first limit hole (26) via a connecting frame limit pin (24), and the first connecting frame (16) and the second connecting frame (17) are both perpendicular to the driving direction; the first heating wall assembly (18) and the second heating wall assembly (19) respectively connected to the other ends of the cross frame portion of the first connecting frame (16) and the second connecting frame (17) heat and raise the temperature of the ground base on both sides corresponding to the non-covered area of ​​the material ridge; In the transport state, one end of the cross frame portion of the first connecting frame (16) and the second connecting frame (17) is fixedly connected to the second limiting hole (27) via a connecting frame limiting pin (24), and the first connecting frame (16) and the second connecting frame (17) are both parallel to the driving direction.

5. The device for strengthening thermal connection between regeneration layers according to claim 3 or 4, characterized in that: The first heating wall assembly (18) and the second heating wall assembly (19) both comprise: a first heating wall frame (28), a first heating module (29), a second heating module (30) and a sealing plate (31); One side of the first heating wall frame (28) is fixedly connected to the horizontal frame portion of the corresponding first connecting frame (16) or second connecting frame (17) via a vertical plate connecting assembly (25), and the first heating module (29), a sealing plate (31) and a second heating module (30) are sequentially installed in the first heating wall frame (28); the sealing plate (31) comprises an upper and a lower sealing plate, and a space between the two sealing plates is filled with thermal insulation cotton; The inlets of the first heating module (29) and the second heating module (30) are respectively connected to the outlet of the liquefied gas tank assembly (8) through corresponding liquefied gas pipelines, and the two heating modules are independently controllable; in a working state, according to the actual temperature of the ground bases on both sides, the first heating module (29) and / or the second heating module (30) are controlled to heat and raise the temperature of the ground base after being sprayed with the strengthening agent; The third heating wall assembly (20) comprises: a second heating wall frame (32), and a plurality of groups of third heating modules (41) arranged in sequence in the second heating wall frame (32); the top of the second heating wall frame (32) is fixedly connected to the paver top push frame (40) via a group of symmetrically arranged fixing seats (21).

6. The device for strengthening thermal connection between regeneration layers according to claim 5, characterized in that: The first heating wall frame (28) and the second heating wall frame (32) are both provided with skirt cloths (33) around their circumferences, so as to prevent hot air from escaping during the heating process; A plurality of hollow rings are welded to the sides of the first heating wall frame (28) and the second heating wall frame (32), the outer circumference of the hollow rings being covered with the skirt cloth (33) and the pressure plate (34) in sequence, and the skirt cloth (33) is fixed to the circumference of the first heating wall frame (28) and the second heating wall frame (32) by R-shaped pins.

7. The device for strengthening thermal connection between regeneration layers according to claim 6, characterized in that: The vertical plate connection assembly (25) comprises: a first vertical plate (41), a second vertical plate (42), a limit pin (43), a retaining ring and an R-shaped pin (44) arranged in parallel; The first vertical plate (41) is fixedly connected to the horizontal frame; one end of the second vertical plate (42) is fixedly connected to one side of the first heating wall frame (28), and the other end is inserted into the middle of the two first vertical plates (41) and is hinged in sequence through the limit pin (43), the retaining ring and the R-shaped pin (44); wherein the corresponding hinge hole on the first vertical plate (41) is an oblong hole, which is used to enable the first heating wall component (18) and the second heating wall component (19) to realize adaptive adjustment in the vertical direction within the oblong hole; A group of first sliding members (35) are installed on one side of the first heating wall frame (28), and a second sliding assembly is installed on the other side for providing support; the second sliding assembly comprises: a first mounting plate (36), a second mounting plate (37), a connecting column (38) and a second sliding member (39); the upper end of the second sliding member (39) is fixedly connected to the second mounting plate (37); the lower end of the connecting column (38) is welded to the second connecting plate (37), and the upper and lower end surfaces of the first mounting plate (36) are connected to the connecting column (38) via a nut; if the first sliding member (35) is on an unmilled road surface and the second sliding assembly is on a milled road surface, the second mounting plate (37) and the second sliding member (39) are adjusted to move in a vertical direction via the nut, so that the first heating wall assembly (18) and / or the second heating wall assembly (19) as a whole are parallel to the milled road surface; Two sets of the second sliding components are respectively installed on both sides of the second heating wall frame (32); in the working state, the second mounting plate (37) and the second sliding member (39) are adjusted to the upper limit position by the nut, so that the third heating wall assembly (19) moves with the whole vehicle; in the transport state, the second mounting plate (37) and the second sliding member (39) are adjusted to the lower limit position by the nut to complete the transfer.

8. An in-situ hot compounding machine, characterized in that: include: A frame (1), a hopper assembly (2), a central bottom mixing cylinder (3), an inclined material lifting device (4), a top mixing cylinder (5), and a regeneration layer interlayer thermal connection strengthening device (6) as described in any one of claims 1 to 7; The hopper assembly (2) is used to receive new asphalt material delivered by the material truck, and to deliver the new asphalt material onto the old asphalt material obtained after milling; the middle bottom mixing cylinder (3) is used to stir and heat a mixture of the new asphalt material and the old asphalt material; the middle bottom mixing cylinder (3) is connected to the top mixing cylinder (5) via the inclined material lifting device (4).

9. An in-situ heat regeneration unit, characterized in that: include: A plurality of in-situ heating vehicles, in-situ heating milling vehicles, in-situ heating temperature raising machines, material vehicles, pavers, rollers, and an in-situ hot remixing machine as claimed in claim 8; The on-site heating vehicle is used to heat the asphalt pavement; the on-site heating milling vehicle is used to mill the heated asphalt pavement, and to peel off the old asphalt material on the surface and gather it into material ridges; the on-site heating temperature raising machine is used to raise the temperature of the old asphalt material after milling; the material vehicle is used to transport the new asphalt material to the hopper assembly (2) of the on-site hot remixer; the push wheel of the paver is in contact with the first paver push wheel frame (14) and the second paver push wheel frame (15) provided on the on-site hot remixer frame (1), and is used to spread and smooth the mixed material output from the discharge port of the top mixing cylinder (5); the roller is used to compact the asphalt pavement after spreading and smoothing.

10. A construction process, characterized in that: The method is performed by the in-situ heat regeneration unit described in claim 9, characterized in that it includes the following steps: A plurality of on-site heating vehicles heat the asphalt pavement; an on-site heating milling vehicle mills the heated asphalt pavement, and peels off the old asphalt material on the surface and gathers it into material ridges; an on-site heating temperature raising machine raises the temperature of the old asphalt material after milling; a hopper assembly (2) of the on-site hot remixer receives the new asphalt material delivered by the material vehicle, and delivers the new asphalt material onto the old asphalt material obtained after milling to form a mixed material; The middle bottom mixing cylinder (3) of the in-situ hot remixing machine collects the mixed material into the cylinder for stirring and heating, and transports the stirred and heated mixed material to the top mixing cylinder (5) through the inclined material lifting device (4); during this process, the strengthening agent spraying unit of the in-situ hot remixing machine sprays the strengthening agent on the milled ground base, and the heating and temperature raising unit of the in-situ hot remixing machine heats and raises the temperature of the ground base after the strengthening agent spraying treatment; The paver spreads and smoothes the mixed material output from the discharge port of the top mixing cylinder (5); and the roller compacts the asphalt pavement after the spreading and smoothing.

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