Small asphalt patching equipment

Abstract

This utility model discloses a small asphalt patching device, belonging to the technical field of road maintenance and construction equipment. The device uses an electric tricycle chassis as its carrier, with a protective box and a seat box mounted on the chassis, and a spray frame installed at the front of the chassis. The protective box contains an asphalt tank for holding emulsified asphalt, and the asphalt tank is equipped with a heating device to maintain the fluidity of the emulsified asphalt. The asphalt tank is connected to the spray frame via an asphalt pump, and a filter is installed in the pump pipeline to reduce impurities entering the spraying system. The spray frame has an asphalt inlet and an asphalt outlet. A regulating gate valve for adjusting the spray flow and a foot valve for controlling on / off are sequentially installed on the pipeline between the inlet and outlet. The foot valve is connected to a nozzle downstream. The device also features a foot valve pedal linked to a wire rope for foot control of spraying start and stop, and a retaining structure is installed on the spray frame to shield road markings or non-construction areas, reducing spray splash pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of road maintenance and construction equipment, specifically a small asphalt patching device. Background Technology

[0002] Fine surface treatment, also known as fine anti-skid surface treatment, is a construction technique used for preventive maintenance of asphalt pavements. This technique typically employs a layer-laying process, using carefully selected single-size crushed stone and high-concentration, high-binder materials. A stabilizing material is then sprayed onto the crushed stone seal layer to form a thin asphalt pavement layer. It is suitable for asphalt pavements of all grades of highways and bridge surface wearing courses without structural defects. Fine surface treatment provides waterproofing, crack resistance, and improved anti-skid performance, delaying the occurrence of asphalt pavement defects and extending the pavement's service life.

[0003] The surface finishing process typically includes spreading crushed stone and binder, compaction with rubber-tired rollers, waste material recovery, and spraying of reinforcing binder. Emulsified asphalt is commonly used as the reinforcing binder and is sprayed by an asphalt distributor. Due to obstacles such as road markings and ancillary facilities at construction sites, as well as abrupt changes in road width, the distributor may fail to spray sufficient emulsified asphalt to the road edges. This results in an uncovered area of ​​approximately 10-20 cm wide along the edge of the crushed stone surface, affecting the stability of the edges and the overall construction quality.

[0004] To address issues such as inconsistent viscosity, nozzle clogging, and uneven spraying in emulsified asphalt spraying operations, various improved solutions for emulsified asphalt spraying devices have emerged in existing technologies. For example, patent document CN212316627U proposes an emulsified asphalt spraying device, mainly focusing on structural improvements to address defects such as the tendency of asphalt to solidify during long-term storage and the ease with which nozzles become clogged. Patent document CN103711061A discloses a novel emulsified asphalt spraying device, which includes a filter, pump, return oil pipeline, and cleaning pipeline (such as with a washing tank and valve switching) to facilitate filtration, return flow, and pipeline cleaning and maintenance. The above solutions have certain reference value in improving spraying continuity, preventing blockage and maintenance convenience, but their design is usually geared towards general spraying / repair conditions and is not designed for the specific needs of "edge leakage repair" and "marking pollution protection" in fine surface treatment construction; there is also a hand-push emulsified asphalt sprayer disclosed in patent document number CN207846152U, which emphasizes the convenience of pushing operation and directional spraying of cracks and other parts.

[0005] To address the aforementioned issue of uncovered edges, current construction methods often rely on manual methods for edge patching, such as manually applying emulsified asphalt using simple containers. This method is not only inefficient and labor-intensive, but also difficult to control consistently in terms of application rate, easily leading to uneven application or excessive splashing, thus contaminating road markings or non-construction areas. Furthermore, emulsified asphalt is prone to adhesion and clogging at low temperatures or when stationary, further increasing construction and maintenance costs. Therefore, there is an urgent need for a compact, mobile, and easily controllable asphalt edge patching device that reduces the risk of road marking contamination and clogging, to meet the quality and efficiency requirements of fine surface finishing work. Utility Model Content

[0006] The technical problem this utility model aims to solve is to overcome the existing defects and provide a small asphalt edge repair device. This device integrates a spraying frame, asphalt bucket, asphalt pump, etc., onto an electric tricycle chassis to form a small motorized edge repair device. It can flexibly repair the blank areas left by the spraying vehicle during fine surface treatment. By setting an adjusting gate valve and a foot valve on the spraying frame pipeline, and using the foot valve pedal to link with the wire rope, the spraying can be started and stopped quickly and the spraying volume can be adjusted, thereby improving the efficiency and controllability of the edge repair operation and effectively solving the problems in the background technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a small asphalt patching device, comprising an electric tricycle chassis, a protective box and a seat box mounted on the electric tricycle chassis, and a spraying frame mounted on the front side of the electric tricycle chassis; the protective box contains an asphalt tank for holding emulsified asphalt, and the asphalt tank is equipped with a heating device; the asphalt tank is connected to an asphalt pump, which is mounted on the electric tricycle chassis, and its oil outlet is connected to the spraying frame via a filter; the spraying frame has an asphalt inlet and an asphalt outlet, and along the flow direction of the emulsified asphalt, a regulating gate valve for adjusting the flow rate and a regulating valve for adjusting the asphalt outlet are sequentially installed on the pipeline between the asphalt inlet and the asphalt outlet. A foot pedal valve controls the on / off state; a regulating gate valve is used to adjust the spray flow rate. The downstream of the foot pedal valve is connected to the nozzle. When the foot pedal valve is open, emulsified asphalt is sprayed through the nozzle to the edge area of ​​the road surface. When the foot pedal valve is closed, the asphalt outlet is connected to the asphalt tank through a return pipeline, and the emulsified asphalt flows back into the asphalt tank through the asphalt outlet to form a circulation loop. The electric tricycle chassis is also equipped with a foot pedal and a steel cable. The foot pedal is linked to the foot pedal valve through the steel cable to realize the foot pedal control of opening or closing the foot valve. The spray frame is equipped with edge guards to cover road markings or non-construction areas to reduce spray splash pollution.

[0008] The spray frame is fixedly connected to the front frame of the chassis via a mounting bracket. The mounting bracket can be a connecting plate, clamp, or sleeve, etc., and is installed on the frame. The spray frame has mounting holes at corresponding positions and is connected to the mounting bracket by bolts, so that the spray frame is stably installed on the front side of the chassis and meets the load-bearing and vibration resistance requirements during spraying operations. When maintenance is required, the bolt connection structure allows for quick assembly and disassembly of the spray frame.

[0009] Furthermore, the heating device is a gas stove, which is located below or around the asphalt drum to heat the emulsified asphalt inside the drum.

[0010] Furthermore, a filter is installed between the oil outlet of the asphalt pump and the asphalt inlet of the spray frame to filter impurities in the emulsified asphalt and reduce the probability of nozzle clogging.

[0011] Furthermore, the spray frame is equipped with a nozzle ball valve, which is located between the foot valve and the nozzle to control the opening and closing of the nozzle, or to close it during maintenance.

[0012] Furthermore, the edge protector is a flexible sheet structure, located on the side of the nozzle and extending toward the road markings, used to shield against spray splashes.

[0013] Furthermore, the foot valve is a normally closed valve. When the foot valve pedal is pressed, the foot valve is opened by pulling the steel wire rope, and the foot valve is closed when the foot valve pedal is released.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses an electric tricycle chassis as a carrier to integrate the spraying frame, asphalt bucket and pumping components into one unit, forming a compact and flexible small asphalt patching device. It can perform directional patching of the edge area of ​​asphalt pavement at the fine surface treatment construction site. It is especially suitable for the edge blank areas that asphalt spraying vehicles cannot cover due to avoiding road markings or road width limitations, thereby improving the stability of the edge parts and improving the overall quality and adaptability of fine surface treatment construction.

[0015] 2. This utility model is equipped with a regulating gate valve and a foot valve on the spraying frame pipeline, and the foot valve pedal is linked to the wire rope for control. This allows the operator to quickly control the start and stop of the emulsified asphalt spraying by foot pedal during the equipment's movement, and to adjust the spraying flow rate. This is beneficial for achieving stable control of the spraying volume in small-area edge repair operations, and reduces problems such as uneven spraying and low efficiency in manual spraying methods.

[0016] 3. By installing a heating device at the asphalt tank and a filter between the asphalt pump and the spraying frame, and by utilizing the reflux structure when the foot valve is closed, the emulsified asphalt forms a circulation loop when not spraying, thereby reducing the residence time of the emulsified asphalt in the pipeline and lowering the probability of demulsification and nozzle clogging. Furthermore, by installing a side shield structure on the spraying frame to shield road markings or non-construction areas, it helps to reduce pollution caused by spray splashes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the electric tricycle chassis of this utility model; Figure 2 This is a schematic diagram of the structure of the spray frame of this utility model; Figure 3 This is a schematic diagram illustrating the spraying principle of this utility model.

[0018] In the diagram: 1. Electric tricycle chassis, 2. Protective box, 3. Seat box, 4. Foot valve pedal, 5. Steel wire rope, 6. Sprayer frame, 7. Asphalt inlet, 8. Asphalt outlet, 9. Regulating gate valve, 10. Nozzle ball valve, 11. Nozzle, 12. Foot valve, 13. Side guard, 14. Asphalt tank, 15. Heating device, 16. Filter, 17. Asphalt pump. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0020] Please see Figure 1-3 This utility model provides a technical solution: a small asphalt patching device, including an electric tricycle chassis 1, a protective box 2 and a seat box 3 on the electric tricycle chassis 1 for carrying equipment components and providing a place for operators to ride and operate; a spray frame 6 is provided on the front side of the electric tricycle chassis 1, the spray frame 6 is located in front of the vehicle's direction of travel, so as to facilitate patching operations on the edge area of ​​the road.

[0021] The protective box 2 contains an asphalt drum 14 for holding emulsified asphalt. The asphalt drum 14 is equipped with a heating device 15, which is a gas stove structure and is located below or around the asphalt drum 14. It is used to heat the emulsified asphalt in the asphalt drum 14 to maintain the fluidity of the emulsified asphalt and reduce the risk of adhesion or blockage due to temperature drop.

[0022] The asphalt tank 14 is connected to the asphalt pump 17 through a pipeline. The asphalt pump 17 is mounted on the electric tricycle chassis 1. Its oil outlet is connected to the spray frame 6 via the filter 16. The filter 16 is located between the oil outlet of the asphalt pump 17 and the asphalt inlet 7 of the spray frame 6. It is used to filter impurities in the emulsified asphalt to reduce the probability of nozzle 11 clogging.

[0023] The spraying frame 6 is equipped with an asphalt inlet 7 and an asphalt outlet 8. A regulating gate valve 9 and a foot valve 12 are sequentially installed on the pipeline between the asphalt inlet 7 and the asphalt outlet 8 along the flow direction of the emulsified asphalt. The regulating gate valve 9 is used to regulate the spraying flow rate of the emulsified asphalt, and the foot valve 12 is used to control the on / off of the spraying of the emulsified asphalt. The downstream of the foot valve 12 is connected to the nozzle 11. When the foot valve 12 is open, the emulsified asphalt is sprayed to the edge area of ​​the road surface through the nozzle 11.

[0024] When the foot valve 12 is closed, the emulsified asphalt is not sprayed through the nozzle 11, but flows back into the asphalt tank 14 through the asphalt outlet 8 on the spray frame 6, thus forming a circulation loop in the non-spraying state, reducing the residence time of the emulsified asphalt in the pipeline and reducing the risk of demulsification and blockage.

[0025] The foot valve 12 is preferably a three-way two-position valve. One end is connected to the downstream pipeline of the regulating gate valve 9, the second end is connected to the nozzle ball valve 10 and the nozzle 11, and the third end is connected to the asphalt outlet 8. When the foot valve 12 is in the open state, it connects the first end and the second end to achieve spraying. When the foot valve 12 is in the closed state, it connects the first end and the third end, so that the emulsified asphalt flows back to the asphalt tank 14 through the asphalt outlet 8 and the return pipeline, forming a circulation loop.

[0026] The electric tricycle chassis 1 is also equipped with a foot pedal 4 and a steel wire rope 5. The foot pedal 4 is linked to the foot valve 12 through the steel wire rope 5. The foot valve 12 is a normally closed valve structure. When the operator steps on the foot pedal 4, the foot valve 12 is opened by pulling the steel wire rope 5. When the foot pedal 4 is released, the foot valve 12 is automatically closed, thereby realizing the foot pedal control of the start and stop of emulsified asphalt spraying.

[0027] The spray frame 6 is a spraying pipeline assembly located on the front side of the electric tricycle chassis 1. It forms a spray frame pipeline and is equipped with an asphalt inlet 7 and an asphalt outlet 8. A regulating gate valve 9 and a foot valve 12 are sequentially installed on the pipeline between the asphalt inlet 7 and the asphalt outlet 8 along the flow direction of the emulsified asphalt. The regulating gate valve 9 is used to regulate the spraying flow rate, and the foot valve 12 is used to control the on / off of the spraying. The foot valve 12 is connected to the nozzle 11 downstream, and a nozzle ball valve 10 is installed between the foot valve 12 and the nozzle 11 to control the on / off of the nozzle 11 or to close it during maintenance. A side guard 13 is installed on the side of the nozzle 11.

[0028] In addition, the edge protector 13 is a flexible sheet structure, which is set on the side of the nozzle 11 and extends toward the road marking. During the edge spraying process, it is used to cover the road marking or non-construction areas to reduce pollution caused by spray splash.

[0029] In operation, the emulsified asphalt is contained in an asphalt tank 14 and heated by a gas stove located below or around the asphalt tank 14 to maintain its good fluidity. The heated emulsified asphalt is then pumped by an asphalt pump 17 through a pipeline to a filter 16. After impurities in the emulsified asphalt are filtered by the filter 16, it enters the spraying frame pipeline through the asphalt inlet 7 on the spraying frame 6. Inside the spraying frame 6, the emulsified asphalt flows sequentially through a regulating gate valve 9 and a foot valve 12. The regulating gate valve 9 is used to adjust the spray flow rate, and the foot valve 12 is used to control the on / off state of the emulsified asphalt.

[0030] When the foot valve 12 is opened, the emulsified asphalt is sprayed onto the edge area of ​​the road surface through the nozzle ball valve 10 and the nozzle 11, thus replenishing the blank areas at the edges during the finishing process. When the foot valve 12 is closed, the emulsified asphalt is not sprayed through the nozzle 11, but flows back into the asphalt tank 14 through the asphalt outlet 8 on the spray frame 6, forming a circulation loop. This reduces the residence time of the emulsified asphalt in the pipeline, thereby reducing the risk of demulsification and blockage. At the same time, the edge guard 13 set on the spray frame 6 shields the road markings or non-construction areas to reduce pollution caused by spray splashes, making the edge repair operation more stable and reliable.

[0031] With the above-mentioned structural design, this utility model can flexibly and efficiently spray emulsified asphalt on the edge area of ​​the road surface during fine surface treatment construction. It has the advantages of compact structure, simple operation, controllable spraying amount and convenient maintenance.

[0032] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A small asphalt patching device, comprising an electric tricycle chassis (1), characterized in that: A protective box (2) and a seat box (3) are provided on the electric tricycle chassis (1). A spray frame (6) is provided on the front side of the electric tricycle chassis (1). An asphalt tank (14) for holding emulsified asphalt is provided in the protective box (2). The asphalt tank (14) is equipped with a heating device (15). An asphalt pump (17) is connected to the asphalt tank (14). The asphalt pump (17) is located on the electric tricycle chassis (1). Its oil outlet is connected to the spray frame (6) through a filter (16). The spray frame (6) is provided with an asphalt inlet (7) and an asphalt outlet (8). The asphalt inlet (7) and the asphalt outlet (8) are connected to each other. Along the flow direction of the emulsified asphalt, the pipeline between the outlets (8) is provided with a regulating gate valve (9) for regulating the flow rate and a foot valve (12) for controlling the on / off state. The downstream of the foot valve (12) is connected to the nozzle (11). When the foot valve (12) is closed, the emulsified asphalt flows back to the asphalt bucket (14) through the asphalt outlet (8) to form a circulation loop. The electric tricycle chassis (1) is also provided with a foot valve pedal (4) and a steel wire rope (5). The foot valve pedal (4) is linked to the foot valve (12) through the steel wire rope (5). The spray frame (6) is provided with a side guard (13).

2. The small asphalt patching device according to claim 1, characterized in that: The heating device is a gas stove, which is located below or around the asphalt drum (14).

3. The small asphalt patching device according to claim 1, characterized in that: The filter (16) is located between the oil outlet of the asphalt pump (17) and the asphalt inlet (7) of the spray frame (6).

4. A small asphalt patching device according to claim 1, characterized in that: The spray frame (6) is equipped with a nozzle ball valve (10), which is located between the foot valve (12) and the nozzle (11).

5. A small asphalt patching device according to claim 1, characterized in that: The edge protector (13) is a flexible sheet structure, located on the side of the nozzle (11) and extending toward the road marking.

6. A small asphalt patching device according to claim 1, characterized in that: The foot valve (12) is a normally closed valve. When the foot valve pedal (4) is pressed down, the foot valve (12) is opened by pulling the steel wire rope (5). When the foot valve pedal (4) is released, the foot valve (12) is closed.

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