Coal mine tunnel concrete paver

Abstract

The utility model relates to the technical field of civil engineering equipment, in particular to a coal mine tunnel concrete paver which comprises a machine frame and a caterpillar band chassis arranged on the machine frame, a road breaking and leveling mechanism is arranged at the front end of the caterpillar band chassis and comprises a lifting frame, a lifting assembly and a road leveling flywheel knife, the lifting frame is movably connected with the caterpillar band chassis, and the lifting assembly is movably connected with the caterpillar band chassis. The lifting assembly is connected with the lifting frame and the crawler chassis, and the flywheel tool rest is arranged at the lower end of the lifting frame and rotationally connected with the flat road flywheel tool. A paving mechanism and a hopper are arranged at the rear end of the machine frame, the paving mechanism comprises a paving support, a spiral material distributing mechanism, a scraper assembly, a vibrating assembly and a compacting assembly, the spiral material distributing mechanism, the scraper assembly, the vibrating assembly and the compacting assembly are sequentially arranged on the paving support from front to back, and a discharging opening of the hopper right faces the spiral material distributing mechanism. According to the road breaking and leveling device, road breaking and leveling can be carried out on the uneven ground before paving operation, and construction blocking caused by the uneven ground is avoided; and concrete surface leveling, concrete compaction and compaction leveling operation can be carried out.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering equipment technology, specifically to a concrete paver for coal mine roadways. Background Technology

[0002] A concrete paver is a specialized construction machine used for paving cement concrete pavements. Its core function is to evenly spread, level, and initially compact concrete materials during road construction. It is mainly used in construction projects requiring high-precision concrete pavements, such as highways, urban roads, airport runways, and port terminals. Concrete pavers significantly improve construction efficiency through mechanized operation, ensuring road surface smoothness and structural density, making them an indispensable key construction machine in modern road construction.

[0003] In the construction of concrete pavements in underground coal mine roadways, the traditional manual paving process is still widely used. This often leads to construction obstacles due to uneven ground, affecting paving quality and resulting in high labor and time costs. Furthermore, the loose paving coefficient fluctuates significantly during paving, directly impacting the uniformity of the concrete surface layer thickness. The compaction process lacks effective mechanical vibration, and relying solely on simple tools makes it difficult to achieve the required compaction levels. This construction method not only leads to excessive resource investment and increased costs but also causes a series of quality hazards due to insufficient vibration and leveling precision. Specifically, it manifests as a high early damage rate to the pavement structure, increased maintenance frequency, and excessive surface flatness deviations, severely impacting the roadway's performance and service life. Summary of the Invention

[0004] This utility model addresses the problem that uneven ground can easily hinder construction and affect paving quality during concrete paving operations in coal mine roadways. It provides a concrete paver for coal mine roadways that can level uneven ground before paving, thus avoiding construction obstacles caused by uneven ground, reducing labor and time costs, and improving concrete paving efficiency and quality. Simultaneously, it can also perform concrete surface leveling, concrete vibration, and compaction leveling operations, realizing mechanized construction of underground coal mine roadways.

[0005] To achieve the above objectives, the technical solution of this utility model is: a concrete paver for coal mine roadways, comprising a frame and a tracked chassis mounted on the frame. A road-breaking and leveling mechanism is provided at the front end of the tracked chassis. The road-breaking and leveling mechanism includes a lifting frame, a lifting assembly, and a leveling wheel cutter. The lifting frame is movably connected to the tracked chassis, and the lifting assembly is connected to both the lifting frame and the tracked chassis, driving the lifting frame to move up and down. A cutter holder is provided at the lower end of the lifting frame, and the leveling wheel cutter is rotatably connected to the cutter holder. The tracked chassis drives the road-breaking and leveling mechanism to move forward synchronously. The lifting assembly can drive the leveling wheel cutter to move up and down via the lifting frame. During operation, the lifting assembly lowers the leveling wheel cutter to a designated position to break up and level the uneven ground under the coal mine roadway.

[0006] The rear end of the frame is equipped with a paving mechanism and a hopper. The paving mechanism includes a paving support and, from front to back, a spiral distribution mechanism, a scraper assembly, a vibrating assembly, and a compaction assembly, all arranged sequentially on the paving support. The outlet of the hopper faces the spiral distribution mechanism. The hopper is used to store concrete. The spiral distribution mechanism is used to spread and distribute the concrete flowing from the hopper to both sides. The scraper assembly scrapes and levels the concrete to facilitate subsequent vibration and paving operations. The vibrating assembly is used to compact the leveled concrete. The compaction assembly is used to compact and level the vibrated concrete.

[0007] Furthermore, a driver's cab is provided on the top of the frame, and the driver's seat and central control panel are fixed on the top of the frame inside the driver's cab. The driver's seat can improve the comfort of the operator when operating the concrete paver, and the operation of various mechanisms can be carried out through the central control panel.

[0008] Furthermore, the upper end of the lifting frame is hinged to a hinge seat, which is fixedly mounted on the track chassis; a transverse shaft is fixedly mounted inside the lifting frame, and through the action of the hinge seat, the lifting frame can be raised or lowered under the action of the lifting assembly.

[0009] Furthermore, the lifting assembly includes a hydraulic cylinder one, a hinge seat two, and a hinge seat three. The tail end and piston rod of the hydraulic cylinder one are hinged to the hinge seat two and the hinge seat three, respectively. The hinge seat two is fixed in the middle of the transverse shaft, and the hinge seat three is fixed on the track chassis. The lifting frame can be driven to descend or rise by the extension and retraction of the piston rod of the hydraulic cylinder one.

[0010] Furthermore, the rear end of the frame is symmetrically provided with two hydraulic cylinders with the piston rods pointing downwards. The piston rod end of the two hydraulic cylinders is fixedly provided with a mounting seat, and a connecting rod is fixedly fitted on the mounting seat. Fastening seats are evenly distributed on both sides of the paving support, and the paving support is fixed to the connecting rods through the fastening seats. The top of the two connecting rods is provided with a protective cover. The extension and retraction of the piston rod of the two hydraulic cylinders can drive the paving mechanism to move downwards or upwards.

[0011] Furthermore, the spiral material distribution mechanism includes two spiral material distribution components and a drive component. The two spiral material distribution components are arranged side by side with opposite rotation directions. The drive component is connected to the spiral material distribution components. The spiral material distribution components are rotatably connected to the paving support. The drive component drives the spiral material distribution components to rotate. The two spiral material distribution components with opposite rotation directions initially spread and distribute the concrete located in the middle to both sides.

[0012] Furthermore, the scraper assembly is an arc-shaped scraper, with both ends of the scraper fixedly connected to the paving support. The scraper can be used to further scrape the concrete to facilitate subsequent vibration and paving operations.

[0013] Furthermore, the vibration assembly includes a vibration bracket, a support, a vibration motor, steel pipes, and a vibrating rod. The vibration bracket is fixedly installed on the paving support. A vertical plate is vertically installed in the middle of the paving support, and a support is fixedly installed at one end of the vertical plate. The vibration motor is installed on the top of the support, and multiple steel pipes are spaced apart at the bottom of the support. One end of the steel pipe passes through the vibration bracket and is connected to the vibrating rod. The vibration motor generates vibration and transmits it to the vibrating rod through the support and steel pipes. The vibrating rod vibrates in the concrete to achieve the effect of compacting the concrete.

[0014] Furthermore, the compaction assembly includes a compaction roller, the two ends of which are rotatably connected to the paving support via roller shafts. The compaction roller uses its own weight to compact and level the vibrated concrete.

[0015] The beneficial effects of this utility model through the above technical solution are as follows:

[0016] This utility model has a reasonable structure and good performance. It can break up and level uneven road surfaces before paving concrete, thereby avoiding obstruction caused by uneven ground, reducing labor and time costs, and improving the efficiency and quality of concrete paving. At the same time, it can also perform concrete surface leveling, concrete vibration and compaction leveling operations, effectively replacing traditional manual methods, realizing mechanized construction of underground roadway surfaces in coal mines, as well as hardening and leveling of road surfaces in underground roadways, significantly improving construction efficiency, reducing the labor intensity of workers, and improving the safety factor of underground coal mine operations.

[0017] This utility model's road breaking and leveling mechanism is located at the front end of the tracked chassis. When the tracked chassis moves, it uses a road leveling wheel to pre-break and level the uneven road surface, thus avoiding construction obstruction caused by uneven ground, improving the quality and efficiency of concrete paving, and ensuring that the road width and levelness meet the design requirements during paving operations. The lifting component is used to drive the road leveling wheel to move up or down. The lifting component can lower the road leveling wheel to a designated position, achieving the effect of breaking and leveling the uneven road surface under coal mine roadways.

[0018] In this invention, concrete in the hopper flows from the outlet to the roadway floor by gravity. The spiral distribution mechanism initially spreads the concrete in the middle to both sides. The scraper assembly is used to scrape the concrete to prepare for subsequent vibration and paving operations. The vibration assembly is used to vibrate and compact the scraped concrete. The compaction assembly is used to compact and level the vibrated concrete. This achieves the effects of concrete distribution, concrete surface leveling, concrete vibration, and compaction and leveling, avoiding quality problems caused by insufficient vibration and inadequate leveling accuracy, improving the roadway's performance and extending its service life. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a concrete paver for coal mine roadways according to this utility model;

[0020] Figure 2 This is a schematic diagram of the road breaking and leveling mechanism of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the paving mechanism of this utility model.

[0022] The attached diagram is labeled as follows: 1 is the frame, 2 is the tracked chassis, 3 is the driver's cab, 4 is the center console, 5 is the lifting frame, 6 is the transverse shaft, 7 is the articulated seat one, 8 is the wheel cutter holder, 9 is the leveling wheel cutter, 10 is the hydraulic cylinder one, 11 is the articulated seat two, 12 is the articulated seat three, 13 is the hydraulic cylinder two, 14 is the connecting rod, 15 is the paving support, 16 is the auger distribution assembly, 17 is the drive assembly, 18 is the scraper, 19 is the vibrating support, 20 is the vertical plate, 21 is the support, 22 is the vibrating motor, 23 is the steel pipe, 24 is the vibrating rod, 25 is the compaction roller, 26 is the fastening seat, 27 is the hopper, and 28 is the protective cover. Detailed Implementation

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

[0024] like Figures 1-3As shown, a concrete paver for coal mine roadways includes a frame 1 and a tracked chassis 2 mounted on the frame 1. A road-breaking and leveling mechanism is located at the front end of the tracked chassis 2. This mechanism includes a lifting frame 5, a lifting assembly, and leveling wheel cutters 9. The lifting frame 5 is movably connected to the tracked chassis 2. The lifting assembly is connected to both the lifting frame 5 and the tracked chassis 2 and drives the lifting frame 5 to move up and down. A cutter holder 8 is located at the lower end of the lifting frame 5, and the leveling wheel cutters 9 are rotatably connected to the cutter holder 8. In this embodiment, the frame 1 is mounted above the tracked chassis 2. Two hydraulic tracks are symmetrically arranged on the tracked chassis 2. These two hydraulic tracks provide power for the concrete paver's movement and are driven by a hydraulic motor. Each hydraulic track consists of a track, a drive wheel, a guide wheel, and a support wheel. The specific structure and working principle of each track are existing technologies and will not be detailed here. The hydraulic motor drives the track relative to the wheel through the drive wheel, thereby enabling the concrete paver to move.

[0025] The lifting frame 5 includes two spaced-apart lifting rods. A reinforcing rod is fixed at the connection between the lifting rods and the wheel cutter holder 8. The wheel cutter holder 9 has a "U" shaped structure. The lower end of the lifting rod is fixedly connected to the wheel cutter holder 8. The two ends of the leveling wheel cutter 9 are rotatably connected to the wheel cutter holder 9 through a cutter shaft. Since the road breaking and leveling mechanism is installed at the front end of the tracked chassis 2, when the tracked chassis 2 moves, it drives the road breaking and leveling mechanism forward. The road breaking and leveling mechanism breaks and levels the uneven ground under the coal mine roadway. Among them, the lifting component drives the lifting frame to make lifting or lowering movements. The lifting frame drives the leveling wheel cutter 9 to make lifting or lowering movements through the wheel cutter holder 8. During operation, the leveling wheel cutter 9 can be lowered to a designated position by the action of the lifting component, and the leveling wheel cutter 9 is used to break and level the uneven road surface.

[0026] The rear end of the frame 1 is equipped with a paving mechanism and a hopper 27. The paving mechanism includes a paving support 15 and, from front to back, a spiral distribution mechanism, a scraper assembly, a vibrating assembly, and a compaction assembly arranged sequentially on the paving support 15. The discharge port of the hopper 27 faces the spiral distribution mechanism. The hopper 27 is fixedly installed on the top of the rear end of the frame 1 and is used to store concrete. When the tracked chassis 2 moves, it drives the hopper 27 and the paving mechanism forward. The concrete inside the hopper 27 flows from the discharge port onto the ground of the coal mine roadway by gravity. The spiral distribution mechanism initially distributes and flattens the concrete located in the middle to both sides. Then, the scraper assembly further flattens the concrete. The vibrating assembly vibrates and compacts the flattened concrete. Finally, the compaction assembly compacts and levels the vibrated concrete by its own weight.

[0027] The top of the frame 1 is provided with a driver's cab 3. Inside the driver's cab 3 are a driver's seat and a central control console 4 fixed to the top of the frame 1. The driver's seat is located behind the central control console 4. The operator can sit in the driver's seat and control the concrete paver through the central control console 4. Hydraulic cylinder 10, hydraulic cylinder 23, vibration motor 22 and hydraulic motor are all connected to the central control console 5.

[0028] The upper end of the lifting frame 5 is hinged to a hinge seat 7, which is fixedly mounted on the track chassis 2. A transverse shaft 6 is fixedly mounted inside the lifting frame 5. In this embodiment, the upper ends of the two lifting rods of the lifting frame 5 are hinged to the hinge seat 7. The transverse shaft 6 is located between the two lifting rods and its two ends are fixedly connected to the two lifting rods respectively. A fixing rod is also installed between the transverse shaft 6 and the wheel cutter holder 8. The two ends of the fixing rod are fixedly connected to the transverse shaft 6 and the wheel cutter holder 8 respectively. The hinge seat 7 facilitates the lifting frame 5 to be raised or lowered by the lifting assembly.

[0029] The lifting assembly includes a hydraulic cylinder 10, a hinge seat 2 11, and a hinge seat 3 12. The tail end and piston rod of the hydraulic cylinder 10 are hinged to the hinge seat 2 11 and the hinge seat 3 12, respectively. The hinge seat 2 11 is fixed in the middle of the transverse shaft 6, and the hinge seat 3 12 is fixed on the track chassis 2. The extension and retraction of the piston rod of the hydraulic cylinder 10 drives the lifting frame 5 to perform lifting or lowering actions. Under the action of the hinge seat 2 11 and the hinge seat 3 12, the hydraulic cylinder 10 can drive the lifting frame 5 to move.

[0030] Two hydraulic cylinders 13 are symmetrically arranged at the rear end of the frame 1, with the piston rods pointing downwards. Each hydraulic cylinder 13 has a mounting base fixed to its piston rod end, and a connecting rod 14 is fixedly mounted on the mounting base. The extension and retraction of the piston rod of the hydraulic cylinder 13 drives the connecting rod 14 to move up and down, which in turn drives the paving mechanism to move up and down, thus meeting the paving requirements at different heights. Two fastening seats 26 are evenly distributed on both sides of the paving support 15. The paving support 15 is fixed to the connecting rod 14 via the fastening seats 26. The fastening seats 26 are fitted onto the connecting rod 14 and secured to the paving support 15 with bolts. The connecting rod 14 is fastened by the bolts to the fastening seats 26, thus connecting the paving support 15 and the connecting rod 14, enabling the connecting rod 14 to drive the paving mechanism to move up and down when it moves. Protective covers 28 are provided on the top of the two connecting rods 14, providing protection for the paving mechanism.

[0031] The spiral material distribution mechanism includes two spiral material distribution components 16 and a drive component 17. The two spiral material distribution components 16 are arranged side by side with opposite rotation directions. The drive component 17 is drivingly connected to the spiral material distribution components 16, and the spiral material distribution components 16 are rotatably connected to the paving support 15. The drive component 17 drives the spiral material distribution components 16 to rotate. The two spiral material distribution components 16 rotate in opposite directions, which can initially distribute and flatten the concrete located in the middle to both sides. The spiral material distribution component 16 includes a spiral shaft and spiral blades fixedly installed on the spiral shaft. The rotational movement of the spiral blades achieves the effect of distributing and flattening the concrete to both sides. The two ends of the spiral shaft are rotatably connected to the paving support 15 through bearings.

[0032] In addition, the drive assembly 17 includes a drive motor, a reducer, and a pulley structure. The output end of the drive motor is connected to the input end of the reducer. The reducer is fixed on the top of the paving support 15. The pulley mechanism includes a drive wheel, a driven wheel, and a transmission belt. The drive wheel and the driven wheel are respectively fixed to the output end of the reducer and one end of the screw shaft. The transmission belt is fitted on the drive wheel and the driven wheel. The drive wheel is connected to the driven wheel through the transmission belt. The drive motor drives the drive wheel to rotate through the reducer. The drive wheel drives the driven wheel to rotate through the transmission belt. The driven wheel drives the screw shaft to rotate, thereby realizing the rotational movement of the screw material distribution assembly 16.

[0033] The scraper assembly is an arc-shaped scraper 18, with the concave surface of the scraper 18 corresponding to the spiral material distribution assembly 17, so that the scraper 18 can further smooth the concrete. The two ends of the scraper 18 are fixedly connected to the paving support 15 respectively.

[0034] The vibration assembly includes a vibration bracket 19, a support 21, a vibration motor 22, steel pipes 23, and vibrating rods 24. The vibration bracket 19 is fixedly mounted on a paving support 15. A vertical plate 20 is vertically mounted in the middle of the paving support 15. A support 21 is fixedly mounted at one end of the vertical plate 20. The support 21 has a "T" shape. The vibration motor 22 is mounted on the top of the support 21. Multiple steel pipes 23 are spaced apart at the bottom of the support 21. One end of each steel pipe 23 passes through the vibration bracket 19 and is connected to a vibrating rod 24. There are six steel pipes 23 and six vibrating rods 24. After the vibration motor 11 generates vibration, the vibration can be transmitted to the vibrating rods 24 through the support 21 and the steel pipes 23. The vibrating rods 24 vibrate in the concrete to achieve the effect of compacting the concrete. The vibration is also transmitted to the vibrating rods 24 through the vertical plate 20 and the vibration bracket 19.

[0035] The compaction assembly includes a compaction roller 25. Both ends of the compaction roller 25 are rotatably connected to the paving support 15 via roller shafts. After the vibrating assembly compacts the concrete, the compaction roller 25 uses its own weight to compact and level the vibrated concrete.

[0036] The working principle of this utility model is as follows: Before concrete paving operations in coal mine roadways, the height of the road breaking and leveling mechanism needs to be adjusted first to ensure that the mechanism can break and level uneven surfaces in the roadways. This is achieved by activating hydraulic cylinder 10, which extends its piston rod to lower the lower end of the lifting frame 5. The upper end of the lifting frame 5 rotates relative to the tracked chassis 2. The lifting frame 5, through the wheel cutter holder 8, lowers the leveling wheel cutter 9. Once the leveling wheel cutter 9 reaches the designated position, hydraulic cylinder 10 is deactivated. Then, the height of the paving mechanism is adjusted according to the required concrete height. The piston rod of hydraulic cylinder 13 extends and retracts, causing the connecting rod 14 to move up and down. The connecting rod 14 then moves the paving mechanism up and down to meet the paving requirements at different heights.

[0037] When concrete paving is carried out in a coal mine roadway, the hopper 27 stores concrete. When the tracked chassis 2 moves, it drives the road breaking and leveling mechanism forward, pushing the leveling wheel cutter 9 to rotate and break and level the uneven road surface. The concrete in the hopper 27 flows out from the outlet of the hopper 27 by gravity and falls onto the roadway floor. The two drive components 17 drive the two spiral distribution components 16 to rotate. The two spiral distribution components 16 initially distribute and level the concrete in the middle to both sides. Then, the scraper 18 further scrapes the concrete to facilitate subsequent vibration paving operations. The vibrating motor 11 generates vibration, and the support 21 and steel pipe 23 transmit the vibration to the vibrating rod 24. The vibrating rod 24 vibrates in the concrete to achieve the effect of vibrating and compacting the concrete. Finally, the compaction roller 25 compacts and levels the vibrated concrete by its own weight.

[0038] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A concrete paver for coal mine roadways, comprising a frame (1) and a tracked chassis (2) mounted on the frame (1), characterized in that, The front end of the tracked chassis (2) is provided with a road breaking and leveling mechanism, which includes a lifting frame (5), a lifting assembly, and a road leveling wheel cutter (9). The lifting frame (5) is movably connected to the tracked chassis (2), and the lifting assembly is connected to the lifting frame (5) and the tracked chassis (2) to drive the lifting frame (5) to perform lifting and lowering movements. A wheel cutter holder (8) is provided at the lower end of the lifting frame (5), and the road leveling wheel cutter (9) is rotatably connected to the wheel cutter holder (8). The rear end of the frame (1) is provided with a paving mechanism and a hopper (27). The paving mechanism includes a paving support (15) and a spiral material distribution mechanism, a scraper assembly, a vibrating assembly and a compaction assembly arranged sequentially from front to back on the paving support (15). The outlet of the hopper (27) is directly opposite the spiral material distribution mechanism.

2. The concrete paver for coal mine roadways according to claim 1, characterized in that, The top of the frame (1) is provided with a cockpit (3), and the cockpit (3) is provided with a driver's seat and a center console (4) fixed to the top of the frame (1).

3. A concrete paver for coal mine roadways according to claim 1, characterized in that, The upper end of the lifting frame (5) is hinged to a hinge seat (7), which is fixedly mounted on the track chassis (2); a transverse shaft (6) is fixedly mounted inside the lifting frame (5).

4. A concrete paver for coal mine roadways according to claim 3, characterized in that, The lifting assembly includes a hydraulic cylinder one (10), a hinge seat two (11) and a hinge seat three (12). The tail end of the hydraulic cylinder one (10) and the piston rod are respectively hinged to the hinge seat two (11) and the hinge seat three (12). The hinge seat two (11) is fixed in the middle of the transverse shaft (6), and the hinge seat three (12) is fixed on the track chassis (2).

5. A concrete paver for coal mine roadways according to claim 1, characterized in that, The rear end of the frame (1) is symmetrically provided with a second hydraulic cylinder (13) with the piston rod facing downward. The piston rod end of the second hydraulic cylinder (13) is fixedly provided with a mounting seat, and a connecting rod (14) is fixedly mounted on the mounting seat. Fastening seats (26) are evenly distributed on both sides of the paving support (15). The paving support (15) is fixed to the connecting rod (14) by the fastening seats (26). The top of the two connecting rods (14) is provided with a protective cover (28).

6. A concrete paver for coal mine roadways according to claim 1, characterized in that, The spiral material distribution mechanism includes two spiral material distribution components (16) and a drive component (17). The two spiral material distribution components (16) are arranged side by side with opposite directions of rotation. The drive component (17) is connected to the spiral material distribution components (16) in a transmission manner. The spiral material distribution components (16) are rotatably connected to the paving support (15).

7. A concrete paver for coal mine roadways according to claim 1, characterized in that, The scraper assembly is an arc-shaped scraper (18), and both ends of the scraper (18) are fixedly connected to the paving support (15).

8. A concrete paver for coal mine roadways according to claim 1, characterized in that, The vibrating assembly includes a vibrating support (19), a support (21), a vibrating motor (22), a steel pipe (23), and a vibrating rod (24). The vibrating support (19) is fixedly installed on the paving support (15). A vertical plate (20) is vertically installed in the middle of the paving support (15). A support (21) is fixedly installed at one end of the vertical plate (20). The vibrating motor (22) is installed on the top of the support (21). Multiple steel pipes (23) are spaced apart at the bottom of the support (21). One end of the steel pipe (23) passes through the vibrating support (19) and is connected to the vibrating rod (24).

9. A concrete paver for coal mine roadways according to claim 1, characterized in that, The compaction assembly includes a compaction roller (25), and both ends of the compaction roller (25) are rotatably connected to the paving support (15) via roller shafts.

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