Pneumatic excavator for underground coal mine

Abstract

The utility model discloses a pneumatic excavator for an underground coal mine. The pneumatic excavator comprises an excavator body, load equipment, an equipment box and a high-pressure oil circulating system, a pneumatic motor is mounted in the equipment box, and a component matched with the pneumatic motor to cool high-pressure oil is arranged in the equipment box; an air inlet and an air outlet are formed in the pneumatic motor, an air pipe is arranged outside the equipment box, and a part matched with the air pipe to wind is arranged on the excavator body. According to the utility model, firstly, the compressed air provided by the compressed air interface is used as a power source for the operation of the load equipment, so that the electric risks of explosion loss and explosion leakage of an electric excavator can be eliminated, and meanwhile, the defects of oxygen consumption and tail gas pollution of a diesel excavator are overcome; normal-pressure air enters the air inlet of the condenser and then is blown to cooling fins of the condenser to cool hydraulic oil, continuous flowing circulation of high-pressure oil is facilitated, and therefore operation and use of load equipment are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a pneumatic excavator used in underground coal mines. Background Art

[0002] A mine excavator is a heavy mechanical equipment specially used in underground mine environments. It is mainly used to dig and load ore or other underground resources.

[0003] Excavators usually control the circulation of high-pressure oil through oil pumps, so that the high-pressure oil acts on the load equipment, thereby driving the load equipment to operate. However, in the prior art, the operation of oil pumps is usually powered by electric or diesel power. In many places in coal mines, such as return air lanes, blasting tunnels, initial blind tunnels of connecting lanes, etc., excavators are used for bottom drums, side repairs, slag removal, silt removal, and digging drainage ditches. However, these places either have high gas content or have strict requirements on ventilation and oxygen content and air quality in the lanes, which makes it easy for electric excavators and diesel-powered excavators to have electrical risks such as explosion failure and leakage when in use. In addition, diesel-powered excavators have the disadvantages of consuming oxygen and exhaust pollution when in use.

[0004] Based on the above-mentioned defects, a pneumatic excavator for underground coal mine is provided. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and to provide a pneumatic excavator for underground coal mines.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pneumatic excavator for underground coal mines, comprising an excavator body, a load device, an equipment box installed on the excavator body, and a high-pressure oil circulation system installed in the equipment box for driving the load device;

[0007] The equipment box is equipped with a pneumatic motor that provides power for the high-pressure oil circulation system, and the equipment box is equipped with a component that cooperates with the pneumatic motor to cool the high-pressure oil;

[0008] The pneumatic motor is provided with an air inlet and an exhaust port for cooperating with the compressed air in and out. An air pipe is arranged outside the equipment box, and the air pipe is connected with the air inlet through a connecting piece. The excavator body is provided with a component for cooperating with the air pipe reeling.

[0009] Preferably, the high-pressure oil circulation system comprises an oil tank arranged in an equipment box and an oil pump for cooperating with the circulation of high-pressure oil, and a reducer for cooperating transmission is installed between the oil pump and the pneumatic motor.

[0010] Preferably, the component that cooperates with the pneumatic motor to cool the high-pressure oil includes a condenser installed in the equipment box. The condenser is connected to the exhaust port through a pipeline. The high-pressure oil flows through the load equipment through the oil circuit and enters the condenser. After being cooled by the condenser, it flows back to the oil tank along the oil circuit.

[0011] Preferably, a muffler is installed in the condenser, and the normal pressure wind discharged from the pneumatic motor enters the condenser and acts on the heat sink of the condenser after passing through the muffler.

[0012] Preferably, the component that cooperates with the air pipe winding includes an equipment frame fixed on the excavator body, and a reel that cooperates with the air pipe winding is rotatably connected to the equipment frame. A coil spring that drives the reel to rotate and reset is provided in the equipment frame, and a retaining ring is fixed on the air pipe to cooperate with the equipment frame to limit its input end.

[0013] Preferably, the connecting piece includes a rotary joint which is arranged outside the equipment rack and connected to the output end of the air pipe, and the output end of the rotary joint is connected to the air inlet.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] In the present application, by setting up a pneumatic motor and utilizing the compressed air provided by the compressed air interface as the power source for the operation of the load equipment, the electrical risks of explosion failure and leakage in electric excavators can be eliminated. At the same time, the shortcomings of diesel excavators such as excessive oxygen consumption and exhaust gas pollution are overcome, thereby solving the disadvantages of using traditional electric and diesel excavators.

[0016] In the present application, the exhaust port of the pneumatic motor is connected to the air inlet of the condenser. After the normal pressure air enters the air inlet of the condenser, it blows onto the heat sink of the condenser, cooling the hydraulic oil, which is beneficial to the continuous flow and circulation of the high-pressure oil, thereby facilitating the operation and use of the load equipment.

[0017] In this application, the atmospheric pressure wind discharged by the pneumatic motor enters the condenser and acts on the heat sink of the condenser after passing through the muffler. The muffler is used to reduce wind noise, thereby achieving the purpose of reducing the operating noise of the equipment.

[0018] In the present application, when the excavator body is moving, the air pipe drives the reel to rotate, causing the air pipe to extend outward relative to the reel. At this time, the coil spring is rewound to store energy. When the excavator is moving in the opposite direction, the reel rotates and resets, thereby automatically reeling the extended air pipe, thereby achieving easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of the external structure of an excavator provided according to an embodiment of the utility model is shown;

[0020] Figure 2A schematic diagram of the operation of the pneumatic motor according to an embodiment of the utility model is shown;

[0021] Figure 3 A schematic diagram of the internal structure of a condenser provided according to an embodiment of the utility model is shown.

[0022] Legend:

[0023] 1. Excavator body; 2. Equipment frame; 3. Reel; 4. Air pipe; 5. Retaining ring; 6. Rotary joint; 7. Equipment box; 8. Pneumatic motor; 9. Air inlet; 10. Exhaust port; 11. Reducer; 12. Oil pump; 13. Oil tank; 14. Load equipment; 15. Condenser; 16. Muffler. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-3 , the utility model provides a technical solution: a pneumatic excavator for underground coal mines, comprising an excavator body 1, a load device 14, an equipment box 7 installed on the excavator body 1, and a high-pressure oil circulation system installed in the equipment box 7 for driving the load device 14;

[0026] A pneumatic motor 8 for providing power to the high-pressure oil circulation system is installed in the equipment box 7, and a component for cooperating with the pneumatic motor 8 to cool the high-pressure oil is provided in the equipment box 7;

[0027] After the high-pressure oil acts on the load device 14, its temperature rises. Cooling the high-pressure oil by the cooling component is beneficial to the continuous flow and circulation of the high-pressure oil, thereby facilitating the operation and use of the load device 14. The load device 14 is an oil cylinder, a chassis motor, etc. installed in the equipment box 7.

[0028] The pneumatic motor 8 is provided with an air inlet 9 and an exhaust port 10 for cooperating with the compressed air in and out. An air pipe 4 is arranged outside the equipment box 7 and connected to the air inlet 9 through a connecting piece. A component for cooperating with the air pipe 4 to be rolled up is arranged on the excavator body 1.

[0029] The air pipe 4 is used to be connected to a compressed air interface arranged underground in a coal mine for meeting construction and ventilation requirements.

[0030] The pneumatic motor 8 is provided with a turbine. The compressed air enters the pneumatic motor 8 through the air inlet 9 and is discharged from the exhaust port 10 after acting on the turbine. When the turbine rotates under the action of the compressed air, it provides power for the circulation of the hydraulic oil. By setting the pneumatic motor 8, the compressed air provided by the compressed air interface is used as the power source for the operation of the load device 14, which can eliminate the electrical risks of explosion failure and leakage in the electric excavator, and overcome the shortcomings of the diesel excavator in terms of additional oxygen consumption and exhaust pollution, solving the disadvantages of the use of traditional electric and diesel excavators.

[0031] Specifically, Figure 2 As shown, the high-pressure oil circulation system includes an oil tank 13 arranged in the equipment box 7 and an oil pump 12 for cooperating with the circulation of high-pressure oil. A reducer 11 for cooperating transmission is installed between the oil pump 12 and the pneumatic motor 8.

[0032] The compressed air downhole drives the pneumatic motor 8, which drives the impeller of the oil pump 12 to rotate through the reducer 11, drives the oil tank 13 to output high-pressure oil from the oil outlet, and drives the load equipment 14 to operate.

[0033] Specifically, Figure 2 and Figure 3 As shown, the components for cooling the high-pressure oil in cooperation with the pneumatic motor 8 include a condenser 15 installed in the equipment box 7. The condenser 15 is connected to the exhaust port 10 through a pipeline. The high-pressure oil flows through the load device 14 through the oil path and enters the condenser 15. After being cooled by the condenser 15, it flows back to the oil tank 13 along the oil path.

[0034] The high-pressure oil enters the oil inlet of the condenser 15 after passing through the load device 14, and returns to the oil tank 13 through the oil outlet of the condenser 15 after passing through the condenser 15. The exhaust port 10 of the pneumatic motor 8 is connected to the air inlet of the condenser 15. Since the compressed air becomes normal pressure after passing through the pneumatic motor 8, the normal pressure air enters the air inlet of the condenser 15, is discharged through the muffler 16, and blows onto the heat sink of the condenser 15 to cool the hydraulic oil passing through the condenser 15.

[0035] A silencer 16 is installed in the condenser 15. After the normal pressure wind discharged by the pneumatic motor 8 enters the condenser 15, it acts on the heat sink of the condenser 15 after passing through the silencer 16. The silencer 16 is a prior art and is used to reduce wind noise, thereby achieving the purpose of reducing the operating noise of the equipment.

[0036] Specifically, Figure 1 As shown, the component for winding up the air pipe 4 includes an equipment frame 2 fixedly mounted on the excavator body 1, a reel 3 for winding up the air pipe 4 is rotatably connected to the equipment frame 2, a coil spring for driving the reel 3 to rotate and reset is arranged in the equipment frame 2, and a retaining ring 5 is fixedly arranged on the air pipe 4 for cooperating with the equipment frame 2 to limit its input end.

[0037] When the coil spring is in a free state, the air pipe 4 is wound on the reel 3, and the air pipe 4 is fixed relative to the reel 3 under the contact between the retaining ring 5 and the equipment frame 2. When the excavator body 1 is moving, the air pipe 4 drives the reel 3 to rotate, so that the air pipe 4 extends outward relative to the reel 3. At this time, the coil spring is reversed to store energy. When the excavator travels in the reverse direction, the reel 3 rotates and resets to rewind the extended air pipe 4.

[0038] The connecting piece includes a rotary joint 6 which is arranged outside the equipment frame 2 and is connected to the output end of the air pipe 4 , and the output end of the rotary joint 6 is connected to the air inlet 9 .

[0039] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pneumatic excavator for use in underground coal mines, comprising an excavator body (1), a load device (14), an equipment box (7) mounted on the excavator body (1), and a high-pressure oil circulation system mounted in the equipment box (7) for driving the load device (14), characterized in that: The equipment box (7) is equipped with a pneumatic motor (8) for providing power to the high-pressure oil circulation system, and the equipment box (7) is provided with a component for cooperating with the pneumatic motor (8) to cool the high-pressure oil; The pneumatic motor (8) is provided with an air inlet (9) and an air outlet (10) for cooperating with the compressed air in and out. An air pipe (4) is arranged outside the equipment box (7). The air pipe (4) is connected to the air inlet (9) via a connecting piece. The excavator body (1) is provided with a component for cooperating with the air pipe (4) to be rolled up.

2. A pneumatic excavator for underground coal mines according to claim 1, characterized in that: The high-pressure oil circulation system comprises an oil tank (13) arranged in an equipment box (7) and an oil pump (12) for cooperating with the circulation of high-pressure oil, and a reducer (11) for cooperating with the pneumatic motor (8) is installed between the oil pump (12) and the pneumatic motor (8).

3. A pneumatic excavator for underground coal mine according to claim 1, characterized in that: The component for cooling the high-pressure oil in cooperation with the pneumatic motor (8) comprises a condenser (15) installed in the equipment box (7); the condenser (15) is connected to the exhaust port (10) via a pipeline; the high-pressure oil flows through the load device (14) through the oil path and then enters the condenser (15); after being cooled by the condenser (15), the high-pressure oil flows back to the oil tank (13) along the oil path.

4. A pneumatic excavator for underground coal mines according to claim 3, characterized in that: The condenser (15) is provided with a muffler (16). After the normal-pressure air discharged from the pneumatic motor (8) enters the condenser (15), it acts on the heat sink of the condenser (15) after passing through the muffler (16).

5. The pneumatic excavator for underground coal mine according to claim 1, characterized in that: The component for cooperating with the air pipe (4) to be wound up comprises an equipment frame (2) fixedly mounted on the excavator body (1), a reel (3) for cooperating with the air pipe (4) to be wound up is rotatably connected to the equipment frame (2), a coil spring for driving the reel (3) to be rotated and reset is arranged in the equipment frame (2), and a retaining ring (5) is fixedly mounted on the air pipe (4) for cooperating with the equipment frame (2) to limit the input end thereof.

6. A pneumatic excavator for underground coal mines according to claim 5, characterized in that: The connecting member comprises a rotary joint (6) arranged outside the equipment frame (2) and connected to the output end of the air pipe (4), and the output end of the rotary joint (6) is connected to the air inlet (9).

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