Concrete spraying machine with air cooling device for hydraulic system of coal mine

Abstract

The utility model relates to the technical field of coal mine underground supporting equipment, and disclose a kind of concrete injection machine of coal mine hydraulic system with air cooling device, including rack, shotcreting machine main body, hydraulic system, air path system and air cooling device.The concrete injection machine of coal mine hydraulic system with air cooling device, by setting air cooling device and using inherent high-pressure wind of shotcreting operation as cooling medium, cancels original independent cooling device, effectively reduces the cost of complete machine more than 20%, air cooling device is integrated and installed in the idle space of rack, improves system integration, makes equipment internal space layout more reasonable, complete machine weight and volume are reduced more than 10%, cooling is realized using inherent wind pressure resource of shotcreting operation, without special hydraulic drive heat dissipation system, reduce the equipment power configuration requirement, make cost reduce about 10%, the cooling system structure of the concrete injection machine is simple, air cooling device is composed of oil cavity shell, heat exchange radiator pipe and other basic components, maintenance is convenient, cooling effect is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of underground support equipment in coal mines, specifically a concrete spraying machine with a hydraulic system and air-cooling device for coal mines. Background Technology

[0002] Hydraulic-driven concrete spraying machines are commonly used in construction sites such as tunnels, mine shafts, and underground engineering projects. When hydraulic equipment is working, the hydraulic oil, its working medium, continuously heats up; therefore, cooling the hydraulic oil is essential for the normal operation of the equipment. Most existing similar equipment uses specialized hydraulic oil radiators, but these have significant technical drawbacks: First, configuring a dedicated hydraulic drive cooling system and supporting pipelines is costly, increasing equipment purchase costs by more than 20%; second, the integration of the auxiliary cooling device with the spraying main unit is low, occupying a large amount of space and affecting the overall equipment layout; third, the dedicated cooling system is hydraulically driven, which consumes hydraulic system resources, requiring a higher-power motor, a larger-flow oil pump, and supporting systems, further increasing equipment costs by about 10%. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To overcome the aforementioned deficiencies of the prior art, this utility model provides a concrete spraying machine with a hydraulic system and air-cooling device for coal mines, solving the problems in the prior art:

[0005] Hydraulic-driven concrete spraying machine cooling systems suffer from drawbacks such as high cost, low integration, and excessive hydraulic resources. This necessitates efforts to reduce equipment costs, optimize spatial layout, and minimize the use of hydraulic system resources.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a concrete spraying machine with a hydraulic system and air-cooling device for coal mines, comprising a frame on which a spraying machine body, a hydraulic system, and an air supply system are mounted; the spraying machine body includes a motor, a gear pump, a hydraulic motor, and a nozzle; the motor is connected to the gear pump via a transmission connection; the gear pump is connected to the hydraulic motor via a pipeline; the hydraulic motor is connected to the spraying conveying mechanism of the spraying machine body; the spraying conveying mechanism is connected to the nozzle via a spraying conveying pipe; the hydraulic system includes a hydraulic oil tank, a hydraulic suction pipe, and a hydraulic return pipe; one end of the hydraulic suction pipe is connected to the hydraulic oil tank, and the other end is connected to the oil inlet of the gear pump; one end of the hydraulic return pipe is connected to the oil outlet of the hydraulic motor; the air supply system includes an air compressor and an air supply pipe; the air compressor is connected to the air supply mechanism of the spraying machine body via the air supply pipe.

[0008] Optionally, the concrete spraying machine with hydraulic system and air-cooling device for coal mines further includes an air-cooling device, which is installed in the idle space of the frame. The air-cooling device includes an oil chamber shell, a heat exchange and heat dissipation pipe, a first air passage connector, a second air passage connector, a first oil passage connector, and a second oil passage connector.

[0009] Optionally, the heat exchange and cooling pipe is located inside the oil chamber housing, and both ends of the heat exchange and cooling pipe are connected to the first air passage connector and the second air passage connector, respectively; the first oil passage connector and the second oil passage connector are respectively located on both sides of the oil chamber housing, and both are connected to the inside of the oil chamber housing; the air-cooling device is connected in series in the middle of the air supply pipe through the first air passage connector and the second air passage connector; the hydraulic return oil pipe is connected in series between the first oil passage connector and the second oil passage connector, and the second oil passage connector is connected to the hydraulic oil tank through the hydraulic return oil pipe.

[0010] Optionally, multiple heat exchange tubes are arranged in parallel inside the oil chamber housing.

[0011] Optionally, the first air duct connector is connected to the air supply pipe near the air compressor, and the second air duct connector is connected to the air supply pipe near the shotcrete machine body.

[0012] Optionally, the first oil circuit connector is connected to the hydraulic return oil pipe near the hydraulic motor end, and the second oil circuit connector is connected to the hydraulic return oil pipe near the hydraulic oil tank end.

[0013] Optionally, the oil chamber housing adopts a sealed structure design, and a sealing element is provided at the connection between the heat exchange heat dissipation pipe and the oil chamber housing.

[0014] (III) Beneficial Effects

[0015] This utility model provides a concrete spraying machine with a hydraulic system and air-cooling device for coal mines, which has the following advantages:

[0016] This concrete spraying machine with a hydraulic system and air-cooling device for coal mines eliminates the need for a separate cooling unit by using the inherent high-pressure air from the spraying operation as the cooling medium. This effectively reduces the overall cost by more than 20%. The air-cooling device is integrated into the idle space of the frame, improving system integration and making the internal space layout of the equipment more reasonable. The weight and volume of the machine are reduced by more than 10%. Cooling is achieved by utilizing the inherent air pressure resources of the spraying operation, eliminating the need for a dedicated hydraulic drive cooling system. This reduces the power configuration requirements of the equipment, further reducing the cost by about 10%. The cooling system of this concrete spraying machine has a simple structure. The air-cooling device consists of basic components such as the oil chamber shell and heat exchange cooling pipes, making maintenance convenient and the cooling effect stable and reliable. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the air-cooling device of this utility model;

[0019] Figure 3 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0020] In the diagram: 1. Frame; 2. Shotcrete machine body; 3. Motor; 4. Gear pump; 5. Hydraulic motor; 6. Shotcrete delivery pipe; 7. Nozzle; 8. Hydraulic system; 9. Hydraulic oil tank; 10. Hydraulic suction pipe; 11. Hydraulic return pipe; 12. Air system; 13. Air compressor; 14. Air duct; 15. Air-cooled device; 16. Oil chamber shell; 17. Heat exchange radiator; 18. First air duct connector; 19. Second air duct connector; 20. First oil duct connector; 21. Second oil duct connector. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by those skilled in the art. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Please see Figures 1 to 3 This utility model provides a technical solution: a concrete spraying machine with hydraulic system and air cooling device for coal mines, including a frame 1, on which the main body of the spraying machine 2, hydraulic system 8 and air circuit system 12 are integrated and installed to achieve a compact layout of the equipment.

[0024] The power transmission path of the shotcrete machine body 2 is as follows: the motor 3 drives the gear pump 4 to operate, the gear pump 4 delivers hydraulic oil to the hydraulic motor 5 through the pipeline, the hydraulic motor 5 drives the shotcrete conveying mechanism of the shotcrete machine body 2 to work, and the concrete is delivered to the nozzle 7 through the shotcrete conveying pipe 6 to complete the spraying operation.

[0025] The oil circulation of the hydraulic system 8 is as follows: the hydraulic oil in the hydraulic oil tank 9 enters the gear pump 4 through the hydraulic suction pipe 11, and the hydraulic oil after being powered by the hydraulic motor 5 is returned through the hydraulic return pipe 11. During the return process, it is cooled by the air cooling device 15 and then returns to the hydraulic oil tank 9.

[0026] The air supply path of the air system 12 is as follows: the high-pressure air generated by the air compressor 13 is transported through the air supply pipe 14, and then passes through the first air supply joint 18, the heat exchange heat dissipation pipe 17, and the second air supply joint 19 of the air-cooling device 15 in sequence, and continues to be sent to the air supply mechanism of the shotcrete machine body 2 through the air supply pipe 14 to provide the required air pressure for shotcrete operation.

[0027] The cooling principle of the air-cooled device 15 is as follows: the hydraulic oil to be cooled in the hydraulic return oil pipe 11 enters the oil chamber housing 16 through the first oil circuit connector 20. At this time, cool air from the air compressor 13 flows through the heat exchange heat dissipation pipe 17. The hydraulic oil contacts the outer wall of the heat exchange heat dissipation pipe 17 to exchange heat. After the hydraulic oil temperature drops, it flows back to the hydraulic return oil pipe 11 through the second oil circuit connector 21. The hot air after heat exchange is sent to the shotcrete machine body 2 through the second air circuit connector 19 and the air supply pipe 14, realizing the effective utilization of air pressure resources.

[0028] Among them, the heat exchange heat dissipation pipe 17 adopts 17 parallel copper pipes. Copper material has good thermal conductivity, which can improve heat exchange efficiency. The oil chamber shell 16 adopts a steel sealing structure, and a seal is set at the connection between it and the heat exchange heat dissipation pipe 17 to ensure that the hydraulic oil inside the oil chamber shell 16 does not leak.

[0029] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0030] In this invention, the working steps of the device are as follows:

[0031] First, the motor 3 and air compressor 13 are started. The motor 3 drives the gear pump 4 to work, and the hydraulic system 8 enters the circulation state. The air compressor 13 generates high-pressure air and delivers it through the air pipe 14. Second, the hydraulic motor 5 drives the shotcrete machine body 2 under the drive of hydraulic oil, and the concrete is sprayed out from the nozzle 7 through the shotcrete delivery pipe 6. At the same time, the return oil of the hydraulic system 8 enters the oil chamber shell 16 of the air-cooling device 15 and exchanges heat with the high-pressure air in the heat exchange heat dissipation pipe 17. After cooling, it returns to the hydraulic oil tank 9. Finally, the high-pressure air after heat exchange continues to provide air pressure for the shotcrete operation, realizing the coordinated operation of cooling and shotcrete operation.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines, characterized in that, The system includes a frame (1), on which a shotcrete machine body (2), a hydraulic system (8), and a ventilation system (12) are mounted. The shotcrete machine body (2) includes a motor (3), a gear pump (4), a hydraulic motor (5), and a nozzle (7). The motor (3) is connected to the gear pump (4) via a transmission. The gear pump (4) is connected to the hydraulic motor (5) via a pipeline. The hydraulic motor (5) is connected to the shotcrete conveying mechanism of the shotcrete machine body (2). The shotcrete conveying mechanism is connected to the nozzle (7) via a shotcrete conveying pipe (6). 7) Connecting; The hydraulic system (8) includes a hydraulic oil tank (9), a hydraulic suction pipe (10) and a hydraulic return pipe (11). One end of the hydraulic suction pipe (10) is connected to the hydraulic oil tank (9), and the other end is connected to the oil inlet of the gear pump (4). One end of the hydraulic return pipe (11) is connected to the oil outlet of the hydraulic motor (5). The air system (12) includes an air compressor (13) and an air supply pipe (14). The air compressor (13) is connected to the air supply mechanism of the shotcrete machine body (2) through the air supply pipe (14).

2. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines according to claim 1, characterized in that: It also includes an air-cooling device (15), which is installed in the idle space of the frame (1). The air-cooling device (15) includes an oil chamber housing (16), a heat exchange heat dissipation pipe (17), a first air path connector (18), a second air path connector (19), a first oil path connector (20), and a second oil path connector (21).

3. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines according to claim 2, characterized in that: The heat exchange heat dissipation pipe (17) is located inside the oil chamber shell (16), and the two ends of the heat exchange heat dissipation pipe (17) are respectively connected to the first air passage connector (18) and the second air passage connector (19); the first oil passage connector (20) and the second oil passage connector (21) are respectively located on both sides of the oil chamber shell (16), and are both connected to the inside of the oil chamber shell (16); the air cooling device (15) is connected in series in the middle of the air supply pipe (14) through the first air passage connector (18) and the second air passage connector (19); the hydraulic return oil pipe (11) is connected in series between the first oil passage connector (20) and the second oil passage connector (21), and the second oil passage connector (21) is connected to the hydraulic oil tank (9) through the hydraulic return oil pipe (11).

4. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines according to claim 2, characterized in that: Multiple heat exchange tubes (17) are arranged in parallel inside the oil chamber housing (16).

5. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines according to claim 2, characterized in that: The first air duct connector (18) is connected to the air duct (14) near the air compressor (13), and the second air duct connector (19) is connected to the air duct (14) near the shotcrete machine body (2).

6. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines according to claim 2, characterized in that: The first oil circuit connector (20) is connected to the hydraulic return pipe (11) near the hydraulic motor (5), and the second oil circuit connector (21) is connected to the hydraulic return pipe (11) near the hydraulic oil tank (9).

7. A concrete spraying machine with a hydraulic system and air-cooling device for coal mines according to claim 2, characterized in that: The oil chamber housing (16) adopts a sealed structure design, and a sealing element is provided at the connection between the heat exchange heat dissipation pipe (17) and the oil chamber housing (16).

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