A paving device applicable to fast-curing polymer materials

Abstract

The present invention discloses a paving device applicable to rapidly curing polymer materials, belonging to the technical field of road surface repair, including a frame, a spiral feeding structure, a vibration compaction structure, and a knurling structure. The spiral feeding structure includes a cylinder body, and spiral feeding blades are installed outside the cylinder body. The spiral feeding blades form a spiral groove for transporting materials. A temperature sensor and a two-way temperature control structure are arranged inside the cylinder body. The two-way temperature control structure includes a heating unit and a refrigeration unit. Through the two-way temperature control structure of the present application, two-way temperature control of heating and cooling can be carried out. Compared with the prior art, it is more applicable to the paving of polyurethane concrete, solving the problems that the existing pavers are mainly applicable to asphalt paving and cannot adapt to the characteristics of rapid curing of polyurethane concrete materials, which easily leads to uneven paving and poor paving quality.

Description

Technical Field

[0001] The present invention relates to the technical field of pavement repair, and particularly to a paving device suitable for rapidly curing polymer materials. Background Art

[0002] With the development of the transportation and civil aviation industries, the demand for the design standard load of the original airport has increased, and damages have occurred in the runway due to long-term use, such as problems on the road surface like slab fracture, joint breakage, local potholes, and pitted surfaces. Moreover, with the warming climate and rising temperature, the structural load-bearing performance and service performance have declined. For large-area repair of airport concrete pavements, especially for improving the slab load, the most common method is to lay a certain thickness of cement or asphalt concrete overlay on the surface of the old slab, which is usually called "overlay" or "paving". When paving asphalt on the airport pavement, the surface layer is generally divided into three layers, from top to bottom, namely the upper layer, the middle layer, and the lower layer, with the total thickness controlled at about 20 cm. One typical paving structure is 5 cm thick SMA-13 asphalt concrete + 6.5 cm thick AC-13 + 6.5 cm thick AC-13 from top to bottom, with a total thickness of 18 cm. The paving of asphalt concrete needs to be completed in three stages, with a long cycle and a cumbersome method. At the same time, due to the material properties of asphalt, diseases such as looseness, water damage, and rutting are likely to occur after the airport has been in operation for some time, and even serious spalling diseases may appear, posing certain safety hazards. For example, in an airport in Central China, a runway of 3200m × 45m was paved with a 21 cm thick asphalt overlay, with a total area of 144,000 ㎡. The airport was closed for construction for 126 days, and diseases such as bulging and pushing occurred soon after it was put into operation. In an airport in Brazil, the long-term high temperature and rainy weather caused delamination of the runway. When the plane took off, the instantaneous negative pressure rolled up a large area of the asphalt layer, causing damage to the tail of the plane and seriously threatening the safe operation of the airport. If a cement concrete overlay is used, since the hardening and setting time of cement concrete is relatively long, a curing period of 28 days is required according to the specifications, and non-stop operation construction cannot be achieved. The paving temperature of asphalt is usually 160°C, and the construction temperature of cement concrete paving should be controlled above 5°C and below 35°C. This temperature condition greatly limits the construction time in high-latitude regions, resulting in a shorter construction period in high-latitude regions. At low temperatures in winter, cement concrete cannot be fully hydrated, and asphalt cannot be constructed either. When paving asphalt, the bonding force is low, and there is a large difference in material strength and elastic modulus. When paving concrete, the new and old layers cannot form superposition. Therefore, neither of them can adhere to the original pavement to form an integrated performance.

[0003] With the progress of technology, a thin-layer paving process for repairing precast airport slabs without interrupting airport operations has emerged as needed. Its new polymer materials can penetrate into the capillary pores and cracks of concrete, playing a role in penetrating repair and strong bonding to the original pavement. At the same time, in order not to affect the normal operation of the airport and achieve environmentally friendly and rapid large-area delivery, it is very necessary to invent a polymer concrete, preferably polyurethane concrete material for thin-layer paving, which can quickly, intelligently, accurately and environmentally solve the manufacturing and repair of airport pavements for slabs quickly, intelligently, accurately and environmentally.

[0004] However, existing paving equipment is mainly used for the paving construction of cement concrete and asphalt materials. Its working principle and structural characteristics are not suitable for the special properties of polyurethane concrete, such as faster curing time, different fluidity characteristics, etc. This leads to problems such as uneven paving and shortened construction windows due to rapid curing when using traditional equipment for polyurethane concrete paving, thus affecting the overall quality and progress of the project.

[0005] For example, the "spiral distributor and its paver" disclosed in the Chinese patent literature, with the publication number CN103526671B, the spiral distributor includes a spiral machine box, a spiral shaft, spiral blades and a baffle plate. The spiral machine box includes a machine box body and a transverse arm. The spiral blades are fixed on the spiral shaft. It also includes two interchangeable connection devices arranged in a mirror image. The interchangeable connection device includes: a horizontal plate with one side plate surface detachably connected to the top surface of the baffle plate; a first longitudinal plate and a second longitudinal plate arranged parallel to each other on the side plate surface of the horizontal plate where the baffle plate is not installed. The first longitudinal plate is detachably connected to the lifting cylinder of the paver, and the second longitudinal plate is detachably connected to one end of the transverse arm; and a back plate arranged on one side edge of the horizontal plate along the length direction, and the back plate is detachably connected to the rear wall plate of the paver. The disadvantage of this patent is that as a relatively conventional existing paver, it is mainly used for asphalt paving, and its structure is also designed for asphalt materials, unable to adapt to the characteristics of rapid curing of polyurethane concrete, resulting in problems such as uneven paving and poor paving quality. Summary of the Invention

[0006] The present invention aims to overcome the problem that existing pavers are mainly suitable for asphalt paving, unable to adapt to the characteristics of rapid curing of polyurethane concrete materials, which easily leads to uneven paving and poor paving quality. It provides a paving device suitable for rapidly curing polymer materials, which can improve the paving quality of polyurethane concrete.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention relates to a paving device suitable for rapidly curing polymer materials, comprising a frame, a spiral feeding structure, a vibration compaction structure, and a knurling structure. The spiral feeding structure includes a cylinder body, and spiral feeding blades are installed outside the cylinder body. The spiral feeding blades form a spiral groove for transporting materials. A temperature sensor and a bidirectional temperature control structure are provided inside the cylinder body. The bidirectional temperature control structure includes a heating unit and a refrigeration unit. The knurling structure includes a knurling bracket and a knurling cylinder.

[0009] The paving devices in the prior art are mainly asphalt paving devices. Due to the different characteristics of asphalt and polyurethane concrete, there are also many differences in the target settings during the paving process of the two. During the asphalt paving process, the temperature control target is mainly to prevent asphalt from solidifying. Therefore, it only needs to simply maintain a relatively high temperature. For polyurethane concrete, however, heating polyurethane concrete will instead accelerate its curing process. Therefore, it is necessary to keep its temperature within a certain range, avoiding both the situation where the temperature is too low resulting in a decrease in its fluidity and thus affecting the paving process, and the situation where it is overheated resulting in too fast curing and a too short construction window. Therefore, through the bidirectional temperature control structure of the present application, bidirectional temperature control for heating and cooling can be carried out, which is more suitable for the paving of polyurethane concrete compared with the prior art.

[0010] Preferably, the cylinder body includes a temperature control layer, the heating unit and the refrigeration unit are arranged on the temperature control layer, and a heat conduction sleeve is provided outside the temperature control layer. The heat conduction sleeve can separate the materials from the heating unit and the refrigeration unit. The refrigeration unit is a semiconductor refrigeration chip, and the heating unit is a heating wire.

[0011] Preferably, in the direction of transporting materials, the spiral feeding structure includes at least two independent temperature control sections. Each temperature control section includes a front section and a rear section. The materials enter the spiral feeding structure from the front section, and the temperature of the rear section is higher than that of the front section.

[0012] Preferably, each temperature control section further includes a middle section, and the temperature of the middle section is between that of the front section and the rear section.

[0013] Preferably, the temperature of the front section is between 15 - 20 °C, the temperature of the middle section is between 25 ± 2 °C, and the temperature of the rear section is between 30 - 35 °C.

[0014] Preferably, a paving box is installed on the frame, and the vibration compaction structure is hingedly connected to the paving box through a hinge bracket.

[0015] Preferably, a pressure device is installed on the knurling bracket, and the pressure device is a pressure regulating oil cylinder or a pressure regulating electric cylinder.

[0016] Preferably, the spiral feeding structure includes a front feeding area and a rear feeding area, and the pitch of the spiral feeding blades in the front feeding area is greater than that of the spiral feeding blades in the rear feeding area. The large pitch in the front can accelerate the feeding process, and the small pitch in the rear can evenly distribute the material finely.

[0017] Preferably, the vibration compaction structure includes a dual-frequency vibration structure, and the dual-frequency vibration structure includes a high-frequency vibrator and a low-frequency vibrator. High-frequency vibration can quickly improve the surface density, and low-frequency vibration can enhance the penetration effect.

[0018] Preferably, a gradient temperature control module is further provided in the knurling cylinder, and a temperature gradient decreasing from the center to the edge is formed on the surface of the knurling cylinder. The gradient heating module can control the material fluidity by using the temperature difference and optimize the texture forming.

[0019] Therefore, the present invention has the following beneficial effects: (1) It can perform two-way temperature control of heating and cooling, and is more suitable for the paving of polyurethane concrete compared with the prior art; (2) Through two feeding areas with different pitches, the feeding process can be accelerated in the front and the material can be evenly distributed finely in the rear, thereby accelerating the paving process and being more adaptable to the rapid curing characteristics of polyurethane concrete; (3) Through dual-frequency vibration, the surface density can be quickly improved and the penetration effect can be enhanced respectively, which is more adaptable to the high penetration force characteristics of polyurethane concrete and can also accelerate the vibration compaction process; (4) The gradient temperature control module controls the material fluidity by using the temperature difference and optimizes the texture forming. Description of the Drawings

[0020] Figure 1 is a schematic structural view of the present invention.

[0021] Figure 2 is a front view schematic of the present invention.

[0022] Figure 3 is a top view schematic of the present invention.

[0023] Figure 4 is a schematic structural view of the knurling cylinder of the present invention.

[0024] Figure 5 is a schematic structural view of the temperature control layer of the present invention.

[0025] In the figure: Slide shoe 1, paving box 2, spiral feeding structure 3, telescopic device 4, rotating handle 5, articulated bracket 6, vibration compaction structure 7, pressure device 8, knurling structure 9, knurling nail 10, semiconductor refrigerating sheet 11, heating wire 12. Detailed Embodiments

[0026] The following further describes the present invention in conjunction with the drawings and specific embodiments.

[0027] Example 1, as shown in Figures 1-5 shown, a paving device suitable for fast-curing polymer materials, including a frame, a spiral feeding structure 3, a vibration compaction structure 7, and a knurling structure 9.

[0028] The frame includes a support base, and the bottom of the support base is provided with sliding shoes 1. The whole frame can be pushed forward through the sliding shoes 1. The sliding shoes 1 can be replaced by other structures that can achieve the functions of support and fixation, such as disc-shaped feet; in a construction environment with higher flatness, they can also be replaced by structures with moving and fixing functions, such as a roller structure with brakes.

[0029] A paving box 2 is installed on the frame. The paving box 2 is mainly used to hold the polyurethane concrete to be paved. The spiral feeding structure 3, the vibration compaction structure 7, and the knurling structure 9 are all directly or indirectly fixed on the paving box 2. A telescopic device 4 is installed on the paving box 2. The telescopic device 4 can adjust the height of the paving box 2 relative to the ground by telescoping, thereby controlling the paving thickness of the polyurethane concrete. The telescopic device 4 includes a rotating handle 5. The user can adjust the height of the paving box 2 by turning the rotating handle 5.

[0030] The spiral feeding structure 3 includes a cylinder body, which can rotate in the paving box 2, and its rotation process is controlled by a feeding motor. Spiral feeding blades are installed on the outside of the cylinder body. A number of spiral feeding blades form a spiral groove for transporting materials. When the cylinder body rotates, the spiral groove can transport the materials from the inlet and carry out paving.

[0031] Further, there are two equally long feeding sections distributed left and right on the cylinder body. The pitches of the spiral feeding blades on these two feeding sections are the same but the rotation directions are opposite. When the cylinder body rotates, the two feeding sections respectively transport the materials added from both ends of the cylinder body to the middle of the cylinder body. Compared with the structure of one-way transportation without segmentation, this structure has a faster transportation efficiency and is more suitable for the characteristics of fast curing of polyurethane concrete.

[0032] The space in the paving box 2 is divided into a front feeding area and a rear feeding area. One such cylinder body is provided in each of the two feeding areas. The cylinder bodies in the two feeding areas have the same height and are arranged parallel to each other. The pitch of the spiral feeding blades in the front feeding area is greater than the pitch of the spiral feeding blades in the rear feeding area. Further, the pitch of the spiral feeding blades in the front feeding area is 1.5 - 2 times the pitch of the spiral feeding blades in the rear feeding area. The large pitch in the front can accelerate the feeding process, and the small pitch in the rear can evenly distribute the materials finely. By carrying out paving in sections, the paving process is also accelerated, which is more suitable for the characteristics of fast curing of polyurethane concrete.

[0033] A temperature sensor and a two-way temperature control structure are provided inside the cylinder body. The two-way temperature control structure includes a heating unit and a refrigeration unit. The cylinder body includes a temperature control layer. The heating unit and the refrigeration unit are arranged on the temperature control layer. A heat conducting sleeve is provided outside the temperature control layer. The heat conducting sleeve can separate the material from the heating unit and the refrigeration unit, which not only plays a role in heat transfer but also prevents the material from sticking to the heating unit and the refrigeration unit. Further, the refrigeration unit is a semiconductor refrigeration sheet 11, and the heating unit is a heating wire 12. There are several semiconductor refrigeration sheets 11, which are arranged in an array on the temperature control layer. There is a gap between adjacent semiconductor refrigeration sheets 11. The heating wire 12 is arranged in a U shape in the gap between the semiconductor refrigeration sheets 11.

[0034] The vibration compaction structure 7 is connected to the paving box 2 through a hinge bracket 6, and vibrates and compacts the concrete during the paving process. The hinge bracket and the paving box 2 are hinged, ensuring that when the paving box 2 vibrates, it will not interfere with the normal operation of the vibration compaction structure, thus ensuring the stability and consistency of the compaction effect.

[0035] The knurling structure 9 includes a knurling cylinder, and an anti-slip structure is provided on the surface of the knurling cylinder. The anti-slip structure is a knurling nail 10, and the shape of the knurling nail 10 is a pyramid shape, that is, a quadrangular pyramid structure, which can reduce the extrusion of the polyurethane concrete material to the surrounding during rolling. Preferably, micro self-cleaning patterns are provided on the surface of the knurling cylinder. Specifically, the micro self-cleaning patterns are provided on the knurling nails 10, and the micro self-cleaning patterns are nano patterns. For example, they can be nano patterns similar to the surface structure of a lotus leaf to reduce polyurethane residue. The material of the knurling cylinder is preferably a fluoropolymer or a ceramic coating is applied on the surface. Specifically, materials such as polytetrafluoroethylene and modified ultra-high molecular weight polyethylene can be selected, and these materials can reduce the adhesion of polyurethane.

[0036] Further, the knurling structure 9 includes a knurling bracket and several independently pressurized knurling cylinders. A pressure device 8 is installed on the knurling bracket. These knurling cylinders are coaxially arranged, and each knurling cylinder is connected to the knurling bracket through a pressure device 8 with adjustable pressure. The pressure device is a pressure regulating oil cylinder or a pressure regulating electric cylinder.

[0037] During use, the equipment of the present application moves along the road surface. After the polyurethane concrete material is added to the paving box 2, it is paved in the front part material area and the rear part material area successively. Then, high-frequency compaction and low-frequency penetration are carried out at the vibration compaction structure 7 successively. Finally, knurling is carried out at the knurling structure 9.

[0038] Example 2, as Figures 1-5 shown, a paving equipment suitable for rapidly curing high molecular materials includes a frame, a spiral feeding structure 3, a vibration compaction structure 7, and a knurling structure 9.

[0039] The frame includes a support base, and a sliding shoe 1 is provided at the bottom of the support base. The overall movement of the frame can be achieved through the sliding shoe 1. The sliding shoe 1 can be replaced by other structures that can achieve the functions of support and fixation, such as disc-shaped feet; in a construction environment with a high level of flatness, it can also be replaced by a structure with moving and fixing functions, such as a roller structure with brakes.

[0040] A paving box 2 is installed on the frame. The paving box 2 is mainly used to hold the polyurethane concrete to be paved. The spiral material distribution structure 3, the vibration compaction structure 7, and the knurling structure 9 are all directly or indirectly fixed on the paving box 2. An expansion device 4 is installed on the paving box 2. The expansion device 4 can adjust the height of the paving box 2 relative to the ground by expanding and contracting, thereby controlling the paving thickness of the polyurethane concrete. The expansion device 4 includes a rotating handle 5. By turning the rotating handle 5, the user can adjust the height of the paving box 2.

[0041] The spiral material distribution structure 3 includes a cylinder body, which can rotate in the paving box 2, and its rotation process is controlled by a material distribution motor. Spiral material distribution blades are installed on the outside of the cylinder body. A number of spiral material distribution blades form a spiral groove for transporting materials. When the cylinder body rotates, the spiral groove can transport the materials from the inlet and carry out paving.

[0042] Further, two material distribution sections with the same length and distributed left and right are provided on the cylinder body. The pitches of the spiral material distribution blades on these two material distribution sections are the same but the rotation directions are opposite. When the cylinder body rotates, the two material distribution sections respectively transport the materials added from both ends of the cylinder body to the middle of the cylinder body. Compared with the structure of single-direction transportation without segmentation, this structure has a faster transportation efficiency and is more suitable for the characteristics of rapid curing of polyurethane concrete.

[0043] The space inside the paving box 2 is divided into a front material distribution area and a rear material distribution area. One of the above-mentioned cylinder bodies is provided in each of the two material distribution areas. The cylinder bodies in the two material distribution areas have the same height and are arranged parallel to each other. The pitch of the spiral material distribution blades in the front material distribution area is greater than the pitch of the spiral material distribution blades in the rear material distribution area. Further, the pitch of the spiral material distribution blades in the front material distribution area is 1.5 - 2 times the pitch of the spiral material distribution blades in the rear material distribution area. The large pitch in the front can accelerate the material distribution process, and the small pitch in the rear can evenly distribute the materials finely. By carrying out paving in sections, the paving process is also accelerated, which is more suitable for the characteristics of rapid curing of polyurethane concrete.

[0044] A temperature sensor and a two-way temperature control structure are provided inside the cylinder body. The two-way temperature control structure includes a heating unit and a refrigeration unit. The cylinder body includes a temperature control layer. The heating unit and the refrigeration unit are arranged on the temperature control layer. A heat conducting sleeve is provided outside the temperature control layer. The heat conducting sleeve can separate the material from the heating unit and the refrigeration unit, playing a role in heat transfer and avoiding the material from sticking to the heating unit and the refrigeration unit. Further, the refrigeration unit is a semiconductor refrigeration sheet 11, and the heating unit is a heating wire 12. There are several semiconductor refrigeration sheets 11, which are arranged in an array on the temperature control layer. There is a gap between adjacent semiconductor refrigeration sheets 11. The heating wire 12 is arranged in a U shape in the gap between the semiconductor refrigeration sheets 11.

[0045] The spiral feeding structure 3 includes at least two independent temperature control sections in the direction of transporting the material. In this embodiment, the temperature control section includes a front section, a middle section, and a rear section. The material enters the spiral feeding structure 3 from the front section. The temperature of the rear section is higher than that of the front section, and the temperature of the middle section is between that of the front section and the rear section. Further, the temperature of the front section is between 15 - 20 °C, the temperature of the middle section is between 25 ± 2 °C, and the temperature of the rear section is between 30 - 35 °C. When the polyurethane first enters the spiral feeding structure 3, the low temperature of the front section can delay its curing reaction, thus avoiding the polyurethane from curing prematurely and staying at the entrance. Heating it to about 25 degrees Celsius at the middle section can ensure the fluidity of the polyurethane concrete. Further heating at the rear section can improve the leveling property of the paving and avoid the material from accumulating at the rear section.

[0046] The vibration compaction structure 7 is connected to the paving box 2 through a hinge bracket 6, and vibrates and compacts the concrete during the paving process. The hinge bracket is hingedly connected to the paving box 2, ensuring that when the paving box 2 vibrates, it will not interfere with the normal operation of the vibration compaction structure, thus ensuring the stability and consistency of the compaction effect.

[0047] The knurling structure 9 includes a knurling cylinder, and an anti-slip structure is provided on the surface of the knurling cylinder. The anti-slip structure is a knurling nail 10, and the shape of the knurling nail 10 is a pyramid shape, that is, a quadrangular pyramid structure, which can reduce the extrusion of the polyurethane concrete material to the surrounding during rolling. Preferably, micro self-cleaning patterns are provided on the surface of the knurling cylinder. Specifically, the micro self-cleaning patterns are provided on the knurling nails 10, and the micro self-cleaning patterns are nano patterns. For example, they can be nano patterns similar to the surface structure of a lotus leaf to reduce polyurethane residue. The material of the knurling cylinder is preferably a fluoropolymer or a ceramic coating is applied on the surface. Specifically, materials such as polytetrafluoroethylene and modified ultra-high molecular weight polyethylene can be selected, and these materials can reduce the adhesion of polyurethane.

[0048] Further, the knurling structure 9 includes a knurling support and a number of independently pressurized knurling cylinders. A pressure device 8 is installed on the knurling support. These knurling cylinders are coaxially arranged, and each knurling cylinder is connected to the knurling support through a pressure device 8 with adjustable pressure. The pressure device is a pressure regulating oil cylinder or a pressure regulating electric cylinder.

[0049] During use, the equipment of the present application moves along the road surface. After the polyurethane concrete material is added to the paving box 2, it is successively paved in the front part of the material area and the rear part of the material area. Then, high-frequency compaction and low-frequency penetration are successively carried out at the vibration compaction structure 7. Finally, knurling is carried out at the knurling structure 9.

[0050] Embodiment 3, as Figures 1-5 shown, a paving equipment suitable for rapidly curing polymer materials includes a frame, a spiral feeding structure 3, a vibration compaction structure 7, and a knurling structure 9.

[0051] The frame includes a support base, and sliding shoes 1 are provided at the bottom of the support base. The overall movement of the frame can be achieved through the sliding shoes 1. The sliding shoes 1 can be replaced by other structures that can achieve the functions of support and fixation, such as disc-shaped feet; in a construction environment with high flatness, they can also be replaced by structures with moving and fixing functions, such as roller structures with brakes.

[0052] A paving box 2 is installed on the frame. The paving box 2 is mainly used to accommodate the polyurethane concrete to be paved. The spiral feeding structure 3, the vibration compaction structure 7, and the knurling structure 9 are all directly or indirectly fixed on the paving box 2. A telescopic device 4 is installed on the paving box 2. The telescopic device 4 can adjust the height of the paving box 2 relative to the ground by telescoping, thereby controlling the paving thickness of the polyurethane concrete. The telescopic device 4 includes a rotating handle 5. The user can adjust the height of the paving box 2 by turning the rotating handle 5.

[0053] The spiral feeding structure 3 includes a cylinder body, which can rotate in the paving box 2, and its rotation process is controlled by a feeding motor. Spiral feeding blades are installed on the outside of the cylinder body. A number of spiral feeding blades form a spiral groove for transporting materials. When the cylinder body rotates, the spiral groove can transport the materials from the inlet and carry out paving.

[0054] Further, two feeding sections with the same length and distributed left and right are provided on the cylinder body. The pitches of the spiral feeding blades on these two feeding sections are the same but the rotation directions are opposite. When the cylinder body rotates, the two feeding sections respectively transport the materials added from both ends of the cylinder body to the middle of the cylinder body. Compared with the structure of single-direction transportation without segmentation, this structure has a faster transportation efficiency and is more suitable for the characteristics of rapid curing of polyurethane concrete.

[0055] The space inside the paving box 2 is divided into a front material distribution area and a rear material distribution area. One of the above-mentioned cylinders is provided in each of the two material distribution areas. The cylinders in the two material distribution areas have the same height and are arranged parallel to each other. The pitch of the spiral material distribution blades in the front material distribution area is greater than that of the spiral material distribution blades in the rear material distribution area. Further, the pitch of the spiral material distribution blades in the front material distribution area is 1.5 - 2 times that of the spiral material distribution blades in the rear material distribution area. The large pitch in the front can accelerate the material distribution process, and the small pitch in the rear can evenly distribute the material precisely. By paving in sections, the paving process is also accelerated, which is more suitable for the characteristics of rapid curing of polyurethane concrete.

[0056] A temperature sensor and a two-way temperature control structure are provided inside the cylinder. The two-way temperature control structure includes a heating unit and a refrigeration unit. The cylinder includes a temperature control layer. The heating unit and the refrigeration unit are arranged on the temperature control layer. A heat conduction sleeve is provided outside the temperature control layer. The heat conduction sleeve can separate the material from the heating unit and the refrigeration unit, which not only plays a role in heat transfer but also prevents the material from sticking to the heating unit and the refrigeration unit. Further, the refrigeration unit is a semiconductor refrigeration sheet 11, and the heating unit is a heating wire 12. There are several semiconductor refrigeration sheets 11, which are arranged in an array on the temperature control layer. There is a gap between adjacent semiconductor refrigeration sheets 11. The heating wire 12 is arranged in a U shape in the gap between the semiconductor refrigeration sheets 11.

[0057] The vibration compaction structure 7 is connected to the paving box 2 through a hinge bracket 6, and vibrates and compacts the concrete during the paving process. The hinge bracket is hingedly connected to the paving box 2, ensuring that when the paving box 2 vibrates, it will not interfere with the normal operation of the vibration compaction structure, thus ensuring the stability and consistency of the compaction effect.

[0058] The vibration compaction structure includes a dual-frequency vibration structure. The dual-frequency vibration structure includes a high-frequency vibrator and a low-frequency vibrator. The high-frequency vibrator and the low-frequency vibrator are installed on the compaction vibration device at the same time and work successively. High-frequency vibration can quickly improve the surface density, and low-frequency vibration can enhance the penetration effect. Preferably, the frequency of high-frequency vibration is 80 - 100HZ, and the frequency of low-frequency vibration is 30 - 50HZ. Further, the vibration can use a sawtooth wave or a square wave instead of a sine wave to increase the instantaneous impact and break the internal bubbles of the polyurethane concrete.

[0059] The knurling structure 9 includes a knurling cylinder, and an anti-slip structure is provided on the surface of the knurling cylinder. The anti-slip structure is a knurling nail 10, and the shape of the knurling nail 10 is a pyramid shape, that is, a quadrangular pyramid structure, which can reduce the extrusion of the polyurethane concrete material to the surroundings during rolling. Preferably, micro self-cleaning patterns are provided on the surface of the knurling cylinder. Specifically, the micro self-cleaning patterns are provided on the knurling nail 10, and the micro self-cleaning patterns are nano patterns. For example, they can be nano patterns similar to the surface structure of a lotus leaf to reduce polyurethane residue. The material of the knurling cylinder is preferably a fluoropolymer or a ceramic coating treatment is performed on the surface. Specifically, materials such as polytetrafluoroethylene and modified ultra-high molecular weight polyethylene can be selected, and these materials can reduce the adhesion of polyurethane.

[0060] Further, the knurling structure 9 includes a knurling bracket and a plurality of independently pressurized knurling cylinders. A pressure device 8 is installed on the knurling bracket. These knurling cylinders are coaxially arranged, and each knurling cylinder is connected to the knurling bracket through a pressure device 8 with adjustable pressure. The pressure device is a pressure regulating oil cylinder or a pressure regulating electric cylinder.

[0061] During use, the equipment of the present application moves along the road surface. After the polyurethane concrete material is added to the paving box 2, paving is successively performed in the front part material area and the rear part material area. Then, high-frequency compaction and low-frequency penetration are successively performed at the vibration compaction structure 7. Finally, knurling is performed at the knurling structure 9.

[0062] Example 4, as Figures 1-5 shown, a paving equipment suitable for rapidly curing polymer materials includes a frame, a spiral feeding structure 3, a vibration compaction structure 7, and a knurling structure 9.

[0063] The frame includes a support base, and sliding shoes 1 are provided at the bottom of the support base. The overall movement of the frame can be achieved through the sliding shoes 1. The sliding shoes 1 can be replaced by other structures that can achieve the functions of support and fixation, such as disc-shaped feet; in a construction environment with relatively high flatness, they can also be replaced by structures with moving and fixing functions, such as a roller structure with brakes.

[0064] A paving box 2 is installed on the frame. The paving box 2 is mainly used to accommodate the polyurethane concrete to be paved. The spiral feeding structure 3, the vibration compaction structure 7, and the knurling structure 9 are all directly or indirectly fixed on the paving box 2. A telescopic device 4 is installed on the paving box 2. The telescopic device 4 can adjust the height of the paving box 2 relative to the ground through telescoping, thereby controlling the paving thickness of the polyurethane concrete. The telescopic device 4 includes a rotating handle 5, and the user can adjust the height of the paving box 2 by turning the rotating handle 5.

[0065] The spiral feeding structure 3 includes a cylinder body which can rotate in the paving box 2, and its rotation process is controlled by a feeding motor. Spiral feeding blades are installed on the outer part of the cylinder body, and several spiral feeding blades form a spiral groove for transporting materials. When the cylinder body rotates, the spiral groove can transport the materials from the inlet and pave them.

[0066] Further, there are two feeding sections with the same length and distributed left and right on the cylinder body. The pitches of the spiral feeding blades on these two feeding sections are the same but the rotation directions are opposite. When the cylinder body rotates, the two feeding sections respectively transport the materials added from both ends of the cylinder body towards the middle of the cylinder body. Compared with the structure of single-direction feeding without segmentation, this structure has a faster feeding efficiency and is more suitable for the characteristics of rapid curing of polyurethane concrete.

[0067] The space in the paving box 2 is divided into a front feeding area and a rear feeding area. One of the above-mentioned cylinder bodies is provided in each of the two feeding areas. The cylinder bodies in the two feeding areas have the same height and are arranged parallel to each other. The pitch of the spiral feeding blades in the front feeding area is greater than that of the spiral feeding blades in the rear feeding area. Further, the pitch of the spiral feeding blades in the front feeding area is 1.5 - 2 times that of the spiral feeding blades in the rear feeding area. The large pitch in the front can accelerate the feeding process, and the small pitch in the rear can evenly distribute the materials finely. By paving in sections, the paving process is also accelerated, which is more suitable for the characteristics of rapid curing of polyurethane concrete.

[0068] A temperature sensor and a two-way temperature control structure are provided in the cylinder body. The two-way temperature control structure includes a heating unit and a refrigerating unit. The cylinder body includes a temperature control layer, and the heating unit and the refrigerating unit are arranged on the temperature control layer. A heat conducting sleeve is provided outside the temperature control layer. The heat conducting sleeve can separate the materials from the heating unit and the refrigerating unit, which not only plays a role in heat transfer but also avoids the materials sticking to the heating unit and the refrigerating unit. Further, the refrigerating unit is a semiconductor refrigerating sheet 11, and the heating unit is a heating wire 12. There are several semiconductor refrigerating sheets 11 which are arranged in an array on the temperature control layer, and there are gaps between adjacent semiconductor refrigerating sheets 11. The heating wire 12 is arranged in a U shape in the gaps between the semiconductor refrigerating sheets 11.

[0069] The vibration compaction structure 7 is connected to the paving box 2 through a hinged bracket 6 and vibrates and compacts the concrete during the paving process. The hinged bracket is hingedly connected to the paving box 2, ensuring that when the paving box 2 vibrates, it will not interfere with the normal operation of the vibration compaction structure, thus ensuring the stability and consistency of the compaction effect.

[0070] The knurling structure 9 includes a knurling cylinder, and an anti-slip structure is provided on the surface of the knurling cylinder. The anti-slip structure is a knurling nail 10, and the shape of the knurling nail 10 is a pyramid shape, that is, a quadrangular pyramid structure, which can reduce the extrusion of the polyurethane concrete material to the surroundings during rolling. Preferably, micro self-cleaning patterns are provided on the surface of the knurling cylinder. Specifically, the micro self-cleaning patterns are provided on the knurling nail 10, and the micro self-cleaning patterns are nano patterns. For example, they can be nano patterns similar to the surface structure of a lotus leaf to reduce polyurethane residue. The material of the knurling cylinder is preferably a fluoropolymer or a ceramic coating treatment is performed on the surface. Specifically, materials such as polytetrafluoroethylene and modified ultra-high molecular weight polyethylene can be selected, and these materials can reduce the adhesion of polyurethane.

[0071] Further, the knurling structure 9 includes a knurling bracket and a plurality of independently pressurized knurling cylinders. A pressure device 8 is installed on the knurling bracket. These knurling cylinders are coaxially arranged, and each knurling cylinder is connected to the knurling bracket through a pressure device 8 with adjustable pressure. The pressure device is a pressure regulating oil cylinder or a pressure regulating electric cylinder.

[0072] Further, a gradient temperature control module is also provided in the knurling cylinder. The overall surface of a plurality of knurling cylinders forms a temperature gradient that decreases by 5-8 °C from the center to the edge. The material fluidity is controlled by the temperature difference to optimize the texture forming. For the knurling cylinder with a uniform temperature in the transmission, since the heat dissipation is faster at both sides of the paving surface, it is easy to cause material accumulation at the edges, and it is more likely to adhere when the knurling cylinder exits. By cooling the edges, the heat dissipation difference can be actively compensated, and the uniformity of the texture depth can be improved. In actual tests, the cooling of the edges significantly reduces the incidence of burrs at the texture edges.

[0073] During use, the equipment of the present application moves along the road surface. After the polyurethane concrete material is added to the paving box 2, it is paved successively in the front part material area and the rear part material area. Then, high-frequency compaction and low-frequency penetration are performed successively at the vibration compaction structure 7. Finally, knurling is performed at the knurling structure 9.

Claims

1. A paving device applicable to fast-curing polymer materials, comprising a frame, a spiral material distribution structure, a vibration compaction structure, and a knurling structure, characterized in that, The spiral feeding structure includes a cylinder body, on the outer part of which spiral feeding blades are installed. The spiral feeding blades form a spiral groove for transporting materials. A temperature sensor and a two-way temperature control structure are arranged inside the cylinder body. The two-way temperature control structure includes a heating unit and a refrigeration unit. The knurling structure includes a knurling bracket and a knurling cylinder. A gradient temperature control module is also arranged inside the knurling cylinder, and a temperature gradient decreasing from the center to the edge of 5-8 °C is formed on the surface of the knurling cylinder.

2. The paving equipment for fast-curing polymer materials according to claim 1, characterized in that, The cylinder body includes a temperature control layer. The heating unit and the refrigeration unit are arranged on the temperature control layer. A heat conduction sleeve is arranged outside the temperature control layer. The refrigeration unit is a semiconductor refrigeration sheet, and the heating unit is a heating wire which is arranged in a U shape in the gap between the semiconductor refrigeration sheets.

3. The paving equipment for fast-curing polymer materials according to claim 1, characterized in that, The spiral feeding structure includes at least two independent temperature control sections in the direction of transporting materials. Each temperature control section includes a front section and a rear section. Materials enter the spiral feeding structure from the front section, and the temperature of the rear section is higher than that of the front section.

4. A paving device applicable to fast-curing polymer materials according to claim 3, characterized in that, Each temperature control section further includes a middle section, and the temperature of the middle section is between that of the front section and that of the rear section.

5. The paving equipment for rapidly curing polymer materials according to claim 4, characterized in that, The temperature of the front section is between 15-20 °C, the temperature of the middle section is between 25±2 °C, and the temperature of the rear section is between 30-35 °C.

6. The paving equipment for rapidly curing polymer materials according to claim 1, characterized in that, A paving box is installed on the frame, and the vibration compaction structure is hinged to the paving box through a hinged bracket.

7. The paving equipment for fast-curing polymer materials according to claim 1, characterized in that, A pressure device is installed on the knurling bracket. The pressure device is a pressure regulating oil cylinder or a pressure regulating electric cylinder, and micro self-cleaning patterns are arranged on the surface of the knurling cylinder.

8. A paving device applicable to fast-curing polymer materials according to any one of claims 1-7, characterized in that, The spiral feeding structure includes a front feeding area and a rear feeding area. The pitch of the spiral feeding blades in the front feeding area is larger than that of the spiral feeding blades in the rear feeding area, and the pitch of the spiral feeding blades in the front feeding area is 1.5-2 times that of the spiral feeding blades in the rear feeding area.

9. A paving device applicable to fast-curing polymer materials according to any one of claims 1-7, characterized in that, The vibration compaction structure includes a dual-frequency vibration structure, and the dual-frequency vibration structure includes a high-frequency vibrator and a low-frequency vibrator.

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