A polyurethane concrete paving apparatus

Abstract

The utility model discloses a kind of polyurethane concrete paving equipment, belong to road surface repair technical field including paving box, the inlet is equipped on the upper side of paving box, spiral distributor is installed in the paving box, the spiral distributor includes the cylinder perpendicular to the moving direction of paving equipment, the cylinder is equipped with bidirectional spiral structure, the bidirectional spiral structure includes first spiral part and second spiral part, the first spiral part and second spiral part opposite rotation, by two different spiral parts of rotation, material is simultaneously distributed and paved, improve paving efficiency, more suitable for the characteristics of polyurethane concrete material rapid solidification, avoid the problem that paving is not uniform in the process of paving, material solidification in advance leads to.

Description

Technical Field

[0001] This utility model relates to the field of road repair technology, and in particular to a polyurethane concrete paving equipment. Background Technology

[0002] With the development of transportation and civil aviation, the load requirements of existing airport design standards have increased, and long-term use of pavements has led to damage such as paving slab breakage, joint cracking, potholes, and surface pitting. Furthermore, climate change and rising temperatures have reduced the structural load-bearing capacity and serviceability of airport concrete pavements. The most common practice for large-scale repairs of airport concrete pavements, especially to increase the load on the paving slabs, is to add a layer of cement or asphalt concrete of a certain thickness to the surface of the old pavement, commonly called "overlay" or "resurfacing." When overlaying asphalt on airport pavements, the surface layer is generally divided into three layers: top layer, middle layer, and bottom layer, from top to bottom, with a total thickness controlled at around 20 cm. One typical overlay structure consists of 5 cm thick SMA-13 ​​asphalt concrete + 6.5 cm thick AC-13 + 6.5 cm thick AC-13, for a total thickness of 18 cm. Asphalt concrete overlay requires three stages, a lengthy process, and complex methods. Furthermore, due to the material properties of asphalt, it is prone to loosening, water damage, and wheel rutting after a period of airport operation, even leading to severe spalling and posing safety hazards. For example, at an airport in Central China, a 3200m x 45m runway underwent a 21cm asphalt overlay, covering a total area of ​​144,000 square meters. Construction was suspended for 126 days, and shortly after being put back into operation, it developed defects such as bulging and shoving. At an airport in Brazil, prolonged high temperatures and heavy rainfall caused runway delamination. During takeoff, the instantaneous negative pressure lifted a large area of ​​the asphalt layer, damaging the aircraft's tail and seriously threatening the airport's safe operation. If cement concrete is used as the overlay, the long curing time (requiring a 28-day curing period according to regulations) makes it impossible to complete the work without interrupting operations. The typical temperature for asphalt overlay is 160℃, while the construction temperature for cement concrete overlay should be controlled between 5℃ and 35℃. This temperature requirement significantly limits construction time in high-latitude regions, resulting in shorter construction cycles. In winter, low temperatures prevent cement concrete from fully hydrating, and asphalt cannot be applied. When using asphalt overlay, the adhesion is low, and the material strength and modulus of elasticity differ greatly. With concrete overlay, the new and old layers cannot overlap, thus neither can bond with the original pavement to form a unified whole.

[0003] With the advancement of technology, a thin-layer paving process for repairing precast airport pavement slabs through rapid on-site assembly without interrupting airport operations has emerged. This process utilizes novel polymer materials that can penetrate into the capillaries and cracks of concrete, providing both penetrating repair and strong adhesion to the original pavement surface. Simultaneously, to ensure uninterrupted airport operations and achieve environmentally friendly, rapid, and large-scale delivery, a new type of polymer concrete, preferably polyurethane concrete, for thin-layer paving is essential. This method offers a fast, intelligent, precise, and environmentally friendly solution for the rapid, intelligent, precise, and environmentally friendly manufacture and repair of airport pavement slabs.

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

[0005] For example, the "Spiral Distributor and Paver of the Same" disclosed in Chinese patent literature, publication number CN103526671B, includes a spiral distributor comprising a spiral housing, a spiral shaft, spiral blades, and a baffle plate. The spiral housing includes a housing body and a transverse arm. The spiral blades are fixed on the spiral shaft. It also includes two interchangeable connection devices arranged in mirror images. Each interchangeable connection device includes: a horizontal plate whose side surface is detachably connected to the top surface of the baffle plate; a first longitudinal plate and a second longitudinal plate parallel to each other, disposed on the side of the horizontal plate where the baffle plate is not installed; the first longitudinal plate is detachably connected to the paver's lifting cylinder; the second longitudinal plate is detachably connected to one end of the transverse arm; and a back plate disposed on one side of the horizontal plate along its length, detachably connected to the paver's rear wall plate. The shortcoming of this patent is that, as a relatively conventional existing paver, it is mainly used for asphalt paving, and its structure is designed for asphalt materials. It cannot adapt to the rapid curing characteristics of polyurethane concrete, leading to uneven paving and poor paving quality. Utility Model Content

[0006] This invention aims to overcome the problem that existing pavers are mainly suitable for asphalt paving and cannot adapt to the rapid curing characteristics of polyurethane concrete materials, which easily leads to uneven paving and poor paving quality. It provides a polyurethane concrete paving device that can improve the paving quality of polyurethane concrete.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a polyurethane concrete paving device, including a paving box, an inlet on the upper side of the paving box, and a spiral distributor installed inside the paving box. The spiral distributor includes a roller perpendicular to the moving direction of the paving device, and the roller is provided with a bidirectional spiral structure. The bidirectional spiral structure includes a first spiral part and a second spiral part, and the first spiral part and the second spiral part rotate in opposite directions.

[0008] In this application, the material is simultaneously distributed and spread using two spiral sections with different directions of rotation, which improves the paving efficiency and is more suitable for the rapid curing characteristics of polyurethane concrete materials, avoiding the problem of uneven paving caused by premature curing of materials during the paving process.

[0009] Preferably, this application also includes a frame and a height adjustment device, wherein the paving box is mounted on the frame.

[0010] Preferably, the paving box has a sliding groove on its inner side, and the height adjustment device includes a height adjustment handle and a height adjustment slider, with the height adjustment slider located inside the sliding groove.

[0011] Preferably, this application also includes a vibratory compaction structure connected to the paving box, the vibratory compaction structure including a hinged support and a vibrating element.

[0012] Preferably, the hinged bracket is hinged to the paving box.

[0013] Preferably, the vibration compaction structure further includes a hydraulic vibrator mounted on the vibrating element. Preferably, this application also includes a knurling structure, which includes a knurling bracket and a knurling cylinder.

[0014] Preferably, the knurling bracket is equipped with a pressure device connected to the knurling cylinder, which is a hydraulic cylinder or an electric cylinder.

[0015] Preferably, the paving box is provided with a partition, which is located between the first spiral section and the second spiral section, and the lower end of the partition is flush with the lower ends of the first spiral section and the second spiral section.

[0016] Preferably, the paving box is provided with a first roller and a second roller, which are arranged in parallel and at the same height.

[0017] Therefore, the present invention has the following beneficial effects: (1) By using two spiral sections with different directions of rotation, the material is distributed and spread at the same time, which improves the spreading efficiency and is more suitable for the rapid curing characteristics of polyurethane concrete materials. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 is a top view of one embodiment of the present invention.

[0020] Figure 3 is a top view of a second embodiment of the present invention.

[0021] Figure 4 is a schematic diagram of a knurled structure according to Embodiment 3 of this utility model.

[0022] In the diagram: 1. Frame; 2. Paving box; 3. Height adjustment device; 4. Vibratory compaction structure; 5. Knurling structure; 6. Slipper; 7. Roller; 8. First spiral section; 9. Second spiral section; 10. Height adjustment handle; 11. Hinge bracket; 12. Vibrating component; 13. Knurling bracket; 14. Knurling cylinder; 15. Pressure device; 16. First fabric spreading area; 17. Second fabric spreading area. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1, as shown in Figures 1-2, is a polyurethane concrete paving equipment, comprising a frame 1, a paving box 2, a height adjustment device 3, a vibration compaction structure 4, and a knurling structure 5. A sliding shoe 6 is installed at the bottom of the frame 1, and the paving box 2 is mounted on the frame 1.

[0025] The paving box 2 is equipped with a spiral material distributor, which includes a roller 7 perpendicular to the direction of movement of the paving equipment. The roller 7 has a bidirectional spiral structure, which includes a first spiral section 8 and a second spiral section 9, with the first spiral section 8 and the second spiral section 9 rotating in opposite directions. The roller 7 is driven by a motor. Openings for adding material are provided at the top of the paving box 2, located on both sides of the paving box 2.

[0026] A height adjustment device 3 is installed between the frame 1 and the paving box 2 to adjust the height of the paving box 2 relative to the frame 1, allowing the concrete paving thickness to be precisely adjusted according to actual needs. The paving box 2 has a sliding groove on its inner side. The height adjustment device 3 includes a height adjustment handle 10 and a height adjustment slider. The height adjustment slider is located within the sliding groove. The upper end of the height adjustment handle 10 is circular, and the lower end of the handle 10 is threaded and installed in a threaded hole. By turning the height adjustment handle 10, the height adjustment device 3 can move up and down, thereby causing the paving box 2 to move up and down relative to the frame 1.

[0027] The vibratory compaction device includes a hinged support 11 and a vibrating element 12. The hinged support is connected to the paving box 2, and the vibrating element 12 vibrates and compacts the concrete during the paving process. The hinged connection between the hinged support and the paving box 2 ensures that even if the paving box 2 vibrates, it will not interfere with the normal operation of the vibratory compaction device, thus guaranteeing the stability and consistency of the compaction effect. The vibratory compaction structure 4 also includes a hydraulic vibrator, which is mounted on the vibrating element 12. The hydraulic vibrator can change the vibration frequency by adjusting the fluid flow rate.

[0028] The knurling structure 5 includes a knurling bracket 13 and a knurling cylinder 14. The knurling cylinder 14 is made of a fluoropolymer, preferably polytetrafluoroethylene (PTFE) or ultra-high performance PTFE. This material does not easily adhere to polyurethane concrete, reducing the amount of surface loose sand caused by rolling, making the road surface cleaner and smoother, and also increasing the service life of the knurling cylinder 14. The knurling cylinder 14 is equipped with knurling studs, which are preferably pyramid-shaped to reduce the squeezing of polyurethane concrete material outwards during rolling.

[0029] During operation, after concrete enters the paving box 2, it is evenly distributed throughout the paving area by a auger spreader, ensuring uniform distribution and consistent thickness. The paving thickness is initially controlled by adjusting the height adjustment handle 10 located on the paving box 2. Simultaneously, the vibratory compaction device begins operation to fully compact the laid concrete, enhancing its structural stability and density. At the same time, a knurling roller 14 is used to finely process the surface, creating a safety texture with good grip, thereby improving road surface friction and ensuring vehicle safety. This entire operating process enables the equipment to complete road paving tasks efficiently and accurately.

[0030] Example 2, as shown in Figure 3, is a polyurethane concrete paving equipment, comprising a frame 1, a paving box 2, a height adjustment device 3, a vibration compaction structure 4, and a knurling structure 5. A sliding shoe 6 is installed at the bottom of the frame 1, and the paving box 2 is mounted on the frame 1.

[0031] The paving box 2 is equipped with a spiral material distributor, which includes a roller 7 perpendicular to the direction of movement of the paving equipment. The roller 7 has a bidirectional spiral structure, which includes a first spiral section 8 and a second spiral section 9, with the first spiral section 8 and the second spiral section 9 rotating in opposite directions. The roller 7 is driven by a motor. Openings for adding material are provided at the top of the paving box 2, located on both sides of the paving box 2.

[0032] Furthermore, the paving box 2 is provided with a first spreading zone 16 and a second spreading zone 17, each containing one of the aforementioned rollers 7. The rollers 7 in the two spreading zones are at the same height and are arranged parallel to each other. The first spreading zone 16 is located at the front of the equipment in the forward direction, and the second spreading zone 17 is located at the rear of the equipment in the forward direction. The pitch of the spiral structure in the first spreading zone 16 is greater than the pitch of the spiral structure in the second spreading zone 17. More specifically, the pitch of the spiral structure in the first spreading zone 16 is 1.5-2 times that of the spiral structure in the second spreading zone 17. The larger pitch of the spiral structure in the first spreading zone 16 can accelerate the material distribution process, while the smaller pitch of the spiral structure in the second spreading zone 17 can finely and evenly distribute the material. By spreading in sections, the spreading process is also accelerated, which is more suitable for the rapid curing characteristics of polyurethane concrete.

[0033] A height adjustment device 3 is installed between the frame 1 and the paving box 2 to adjust the height of the paving box 2 relative to the frame 1, allowing for precise adjustment of the concrete paving thickness according to actual needs. The paving box 2 has a sliding groove on its inner side. The height adjustment device 3 includes a height adjustment handle 10 and a height adjustment slider, with the slider located within the sliding groove. The upper end of the height adjustment handle 10 is circular, and the lower end is threaded and installed in a threaded hole. Turning the height adjustment handle 10 allows the height adjustment device 3 to move up and down, thereby causing the paving box 2 to move up and down relative to the frame 1.

[0034] The vibratory compaction device includes a hinged support 11 and a vibrating element 12. The hinged support is connected to the paving box 2, and the vibrating element 12 vibrates and compacts the concrete during the paving process. The hinged connection between the hinged support and the paving box 2 ensures that even if the paving box 2 vibrates, it will not interfere with the normal operation of the vibratory compaction device, thus guaranteeing the stability and consistency of the compaction effect. The vibratory compaction structure 4 also includes a hydraulic vibrator, which is mounted on the vibrating element 12. The hydraulic vibrator can change the vibration frequency by adjusting the fluid flow rate.

[0035] The knurling structure 5 includes a knurling bracket 13 and a knurling cylinder 14. The knurling cylinder 14 is made of a fluoropolymer, preferably polytetrafluoroethylene (PTFE) or ultra-high performance PTFE. This material does not easily adhere to polyurethane concrete, reducing the amount of surface loose sand caused by rolling, making the road surface cleaner and smoother, and also increasing the service life of the knurling cylinder 14. The knurling cylinder 14 is equipped with knurling studs, which are preferably pyramid-shaped to reduce the squeezing of polyurethane concrete material outwards during rolling.

[0036] During operation, after concrete enters the paving box 2, it is evenly distributed throughout the paving area by a auger spreader, ensuring uniform distribution and consistent thickness. The paving thickness is initially controlled by adjusting the height adjustment handle 10 located on the paving box 2. Simultaneously, the vibratory compaction device begins operation to fully compact the laid concrete, enhancing its structural stability and density. At the same time, a knurling cylinder 14 is used to finely process the surface, ensuring even and detailed knurling patterns to create a safe texture with good grip, thereby improving road surface friction and ensuring vehicle safety. This entire operating process enables the equipment to complete road paving tasks efficiently and accurately.

[0037] Example 3, as shown in Figure 4, is a polyurethane concrete paving equipment, comprising a frame 1, a paving box 2, a height adjustment device 3, a vibration compaction structure 4, and a knurling structure 5. A slipper 6 is installed at the bottom of the frame 1, and the paving box 2 is mounted on the frame 1.

[0038] The paving box 2 is equipped with a spiral material distributor, which includes a roller 7 perpendicular to the direction of movement of the paving equipment. The roller 7 has a bidirectional spiral structure, which includes a first spiral section 8 and a second spiral section 9, with the first spiral section 8 and the second spiral section 9 rotating in opposite directions. The roller 7 is driven by a motor. Openings for adding material are provided at the top of the paving box 2, located on both sides of the paving box 2.

[0039] Furthermore, the paving box 2 is provided with a first spreading zone 16 and a second spreading zone 17, each containing one of the aforementioned rollers 7. The rollers 7 in the two spreading zones are at the same height and are arranged parallel to each other. The first spreading zone 16 is located at the front of the equipment in the forward direction, and the second spreading zone 17 is located at the rear of the equipment in the forward direction. The pitch of the spiral structure in the first spreading zone 16 is greater than the pitch of the spiral structure in the second spreading zone 17. More specifically, the pitch of the spiral structure in the first spreading zone 16 is 1.5-2 times that of the spiral structure in the second spreading zone 17. The larger pitch of the spiral structure in the first spreading zone 16 can accelerate the material distribution process, while the smaller pitch of the spiral structure in the second spreading zone 17 can finely and evenly distribute the material. By spreading in sections, the spreading process is also accelerated, which is more suitable for the rapid curing characteristics of polyurethane concrete.

[0040] A height adjustment device 3 is installed between the frame 1 and the paving box 2 to adjust the height of the paving box 2 relative to the frame 1, allowing for precise adjustment of the concrete paving thickness according to actual needs. The paving box 2 has a sliding groove on its inner side. The height adjustment device 3 includes a height adjustment handle 10 and a height adjustment slider, with the slider located within the sliding groove. The upper end of the height adjustment handle 10 is circular, and the lower end is threaded and installed in a threaded hole. Turning the height adjustment handle 10 allows the height adjustment device 3 to move up and down, thereby causing the paving box 2 to move up and down relative to the frame 1.

[0041] The vibratory compaction device includes a hinged support 11 and a vibrating element 12. The hinged support is connected to the paving box 2, and the vibrating element 12 vibrates and compacts the concrete during the paving process. The hinged connection between the hinged support and the paving box 2 ensures that even if the paving box 2 vibrates, it will not interfere with the normal operation of the vibratory compaction device, thus guaranteeing the stability and consistency of the compaction effect. The vibratory compaction structure 4 also includes a hydraulic vibrator, which is mounted on the vibrating element 12. The hydraulic vibrator can change the vibration frequency by adjusting the fluid flow rate.

[0042] The knurling structure 5 includes a knurling bracket 13 and a knurling cylinder 14. A pressure device 15 connected to the knurling cylinder 14 is installed on the knurling bracket 13. The pressure device 15 is a hydraulic cylinder or an electric cylinder.

[0043] Furthermore, the knurling structure 5 includes several independently pressurized knurling cylinders 14, which are coaxially arranged. Each knurling cylinder 14 is individually equipped with a pressure device 15 to ensure that the knurling cylinder 14 can knurl without being suspended in the air when the road surface is uneven.

[0044] The knurling cylinder 14 is made of a fluoropolymer, preferably polytetrafluoroethylene (PTFE) or ultra-high performance PTFE. This material does not easily adhere to polyurethane concrete, reducing the amount of loose sand on the surface caused by rolling, resulting in a cleaner and smoother road surface, while also extending the service life of the knurling cylinder 14. The knurling cylinder 14 is equipped with knurling studs, preferably pyramid-shaped, to reduce the squeezing of polyurethane concrete material outwards during rolling.

[0045] During operation, after concrete enters the paving box 2, it is evenly distributed throughout the paving area by a auger spreader, ensuring uniform distribution and consistent thickness. The paving thickness is initially controlled by adjusting the height adjustment handle 10 located on the paving box 2. Simultaneously, the vibratory compaction device begins operation to fully compact the laid concrete, enhancing its structural stability and density. Meanwhile, the knurling roller 14 performs fine finishing on the surface. The knurling roller 14 receives fixed pressure through a pressure device 15, allowing it to adapt to minor differences in pavement elevation, ensuring even and fine knurling patterns. This creates a safe texture with good grip, thereby improving road surface friction and ensuring vehicle safety. This entire operating process enables the equipment to complete road paving tasks efficiently and accurately.

Claims

1. A polyurethane concrete paving apparatus characterized by, The device includes a paving box with a material inlet on its upper side. A spiral material distributor is installed inside the paving box. The spiral material distributor includes a roller perpendicular to the direction of movement of the paving equipment. The roller has a bidirectional spiral structure, comprising a first spiral section and a second spiral section, with the first and second spiral sections rotating in opposite directions. It also includes a height adjustment device. A sliding groove is provided inside the paving box. The height adjustment device includes a height adjustment handle and a height adjustment slider. The height adjustment slider is located within the sliding groove, and the lower end of the height adjustment handle has a thread.

2. A polyurethane concrete paving apparatus according to claim 1, characterised in that, It also includes a frame, on which the paving box is mounted, and an opening is provided on the top of the paving box, located on both sides of the paving box.

3. A polyurethane concrete paving apparatus according to claim 2, characterised in that, The upper end of the height adjustment handle is circular and is installed inside a threaded hole.

4. A polyurethane concrete paving apparatus as defined in claim 1, wherein, It also includes a vibratory compaction structure connected to the paving box, the vibratory compaction structure comprising a hinged support and a vibrating element.

5. A polyurethane concrete paving apparatus according to claim 4, characterised in that, The hinged bracket is hinged to the paving box.

6. A polyurethane concrete paving device according to claim 4, characterized in that, The vibration compaction structure also includes a hydraulic vibrator, which is mounted on the vibrating element.

7. The polyurethane concrete paving equipment according to claim 1, characterized in that, It also includes a knurling structure, which includes a knurling bracket and a knurling cylinder.

8. A polyurethane concrete paving device according to claim 7, characterized in that, The knurling bracket is equipped with a pressure device connected to the knurling cylinder, which is a hydraulic cylinder or an electric cylinder.

9. A polyurethane concrete paving equipment according to any one of claims 1-8, characterized in that, The paving box is equipped with a partition, which is located between the first spiral section and the second spiral section. The lower end of the partition is flush with the lower ends of the first spiral section and the second spiral section.

10. A polyurethane concrete paving device according to any one of claims 1-8, characterized in that, The paving box is equipped with a first roller and a second roller, which are arranged in parallel and at the same height.

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