Hydraulic rotary disc track for coal mine underground

Abstract

The utility model relates to the technical field of auxiliary transport equipment in pit, and concretely is a kind of for the hydraulic rotary disc track in coal mine, including base, rotary disc main body and hydraulic pusher device. Through hydraulic drive, rotary disc automatic switching and mine car automatic pushing are realized, further reduce labour intensity, improve the coherence and efficiency of transport process;Comprehensively guarantee operation safety, track butt joint precision and mine car pushing stability;While adapting existing emulsion system in pit, manufacturing cost is low, installation is convenient, can be widely applied to coal mine track transport scene, especially suitable for large transport volume, mine car frequent turnover operating face.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary transportation equipment in coal mines, specifically a hydraulic rotary table for use in coal mines. Background Technology

[0002] In underground coal mine rail transport operations, turntables are key equipment for switching the direction of mine cars on different tracks and ensuring flexible scheduling of transport routes. Currently, underground turntables are generally operated manually, and mine cars need to be manually pushed to the next track after track switching, which presents the following prominent problems: High labor intensity: The main body of the turntable plus the mine car is quite heavy. Operators need to push the main body of the turntable to complete the track switching. Manual pushing is extremely physically demanding, especially in the damp and confined environment underground. Long-term operation can easily lead to fatigue.

[0003] Low efficiency: Manually switching tracks takes 3-5 minutes per time, and manually pushing mine cars to designated positions takes 2-3 minutes per time. During peak periods of raw coal transportation, untimely operation can easily cause mine car queues and congestion, seriously affecting the efficiency of underground transportation.

[0004] High safety risks: Operators need to push the turntable and mine cars near the mine car operating area, which poses a risk of collision with passing mine cars; uneven force when manually pushing the turntable can easily cause jamming, which may cause hand injuries; if the force is unbalanced when pushing the mine car, it may also cause the mine car to deviate and cause collision accidents.

[0005] Poor alignment accuracy: Track alignment relies entirely on the operator's feel. If the alignment deviation exceeds 2mm, it can easily cause the mine car wheels to jam on the track. When manually pushing the mine car, it is difficult to ensure that the mine car moves accurately along the track, and the mine car is prone to deviating. All of these require additional manpower for adjustment. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hydraulic rotary table for underground coal mines.

[0007] The technical solution adopted by this utility model to solve its technical problem is: A hydraulic rotary table for use in coal mines includes a base, a rotary table body, and a hydraulic trolley device. The base has an annular guide rail at its top. The rotary table body includes a bottom connecting plate rotatably connected to the base via the annular guide rail, and an upper support plate concentrically fixed to the bottom connecting plate. A rotary hydraulic cylinder is located on the base below the bottom connecting plate, and is drivenly connected to the bottom connecting plate. A hydraulic positioning pin is located on the base below the bottom connecting plate, and the bottom connecting plate has pin holes adapted to the hydraulic positioning pin. A first mounting platform for supporting the incoming mine car track is located on the outer side of the rotary table body, and a second mounting platform is located on the side of the base opposite the mine car track after the rotary table body is switched away. The upper support plate has a rotary table track capable of docking with the mine car track. The hydraulic trolley device is mounted on the first and second mounting platforms.

[0008] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: The hydraulic drive enables automatic switching of the turntable and automatic pushing of mine cars, further reducing labor intensity and improving the continuity and efficiency of the transportation process. It can fully guarantee operational safety, track docking accuracy and mine car pushing stability. At the same time, it is compatible with existing underground emulsion systems, has low manufacturing cost and is easy to install. It can be widely used in underground rail transportation scenarios in coal mines, especially suitable for working faces with large transportation volume and frequent mine car turnover.

[0009] As a preferred embodiment, a further technical solution of this utility model is: Preferably, the hydraulic trolley device includes a fixed plate, on which a trolley cylinder is arranged pointing towards the center of the upper support plate. A push plate is connected to the piston rod of the trolley cylinder, and a limit baffle is rotatably provided at one end of the push plate near the upper support plate.

[0010] Preferably, the upper support plate, the first mounting platform, and the second mounting platform are provided with track alignment scale lines.

[0011] Preferably, the rotary hydraulic cylinder is connected to the downhole emulsion pump station via a hydraulic valve assembly and a high-pressure hose. The hydraulic valve assembly includes a manual directional valve and a flow regulating valve.

[0012] Preferably, the hydraulic valve assembly further includes a hydraulic lock and an overload relief valve, with the hydraulic lock connected in series in the oil inlet line of the rotary hydraulic cylinder and the overload relief valve connected in parallel in the oil outlet line of the hydraulic valve assembly.

[0013] Preferably, the hydraulic valve group also includes a trolley reversing valve, and the trolley cylinder is connected to the downhole emulsion pump station through a branch high-pressure hose and the trolley reversing valve. A one-way throttle valve is connected in series on the branch high-pressure hose.

[0014] Preferably, there are two hydraulic positioning pins, which are symmetrically distributed at 180° along the center of the turntable body. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the base portion in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the turntable body in an embodiment of this utility model; Figure 3 This is a structural schematic diagram of the hydraulic trolley device in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Base; 2. Circular guide rail; 3. Bottom connecting plate; 4. Upper support plate; 5. Rotary hydraulic cylinder; 6. Hydraulic positioning pin; 7. Pin hole; 8. First mounting platform; 9. Second mounting platform; 10. Turntable track; 11. Fixing plate; 12. Push plate; 13. Limiting baffle. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0018] like Figures 1 to 3 As shown in the figure, this embodiment provides a hydraulic rotary table for use in underground coal mines, including a base 1, a rotary table body, and a hydraulic trolley device. The base 1 has an annular guide rail 2 at its top. The rotary table body includes a bottom connecting plate 3 rotatably connected to the base 1 via the annular guide rail 2, and an upper support plate 4 concentrically fixed to the bottom connecting plate 3. A rotary hydraulic cylinder 5 is located on the base 1 below the bottom connecting plate 3, and the rotary hydraulic cylinder 5 is drivenly connected to the bottom connecting plate 3. A hydraulic positioning pin 6 is located on the base 1 below the bottom connecting plate 3, and the bottom connecting plate 3 has pin holes 7 adapted to the hydraulic positioning pin 6. A first mounting platform 8 for supporting the incoming mine car track is located on the outer side of the rotary table body on the base 1. A second mounting platform 9 is located on the base 1 on the side of the rotary table body facing away from the mine car track after switching. A rotary table track 10 capable of docking with the mine car track is located on the upper support plate 4. The hydraulic trolley device is mounted on the first mounting platform 8 and the second mounting platform 9.

[0019] In practice, a reducer can be connected to the output end of the rotary hydraulic cylinder 5. A drive gear is installed at the output end of the reducer. A driven gear is coaxially installed on the bottom surface of the bottom connecting plate 3. The driven gear meshes with the drive gear, thereby enabling the rotary hydraulic cylinder 5 to drive the turntable body to rotate. The turntable track 10 can be set with two track gauges, 600mm and 900mm, to increase adaptability.

[0020] In practice, the incoming mine car track is the track used to carry the mine cars to the turntable body; the switched mine car track is the track used to carry the mine cars away after the direction is changed. Figure 2Taking the scheme for turning a mine car as an example, the mine car track in the direction of travel and the mine car track after switching are the same mine car track. The hydraulic pusher device set on the first installation platform 8 is used to push the mine car into the turntable body, and the hydraulic pusher device set on the second installation platform 9 is used to push the mine car out of the turntable body.

[0021] The hydraulic trolley device includes a fixed plate 11. A trolley cylinder is provided on the fixed plate 11 pointing towards the center of the upper support plate. A push plate 12 is connected to the piston rod of the trolley cylinder. A limit baffle 13 is rotatably provided at one end of the push plate 12 near the upper support plate 4. The rotation setting can be achieved by conventional pins or hinges.

[0022] In practice, the pusher cylinder runs parallel to the mine car track. The rotating limit baffle 13 can be laid flat towards the turntable body, allowing the mine car to pass over the hydraulic pusher. When the mine car is to be pushed, the limit baffle 13 is raised, with the side of the limit baffle 13 abutting against the end of the push plate 12 at a stable 90° angle. After the pusher cylinder is activated, the raised limit baffle 13 can abut against the rear of the mine car, thus pushing the mine car forward. In a specific implementation, a support bar can be set on the surface of the push plate 12, with the end of the support bar abutting against the side of the raised limit baffle 13, improving the stability of the limit baffle 13 during the pusher process.

[0023] The upper support plate 4, the first mounting platform 8, and the second mounting platform 9 are equipped with track alignment scale lines to determine the track alignment status. Specifically, a scale line from 0 to 180° can be set on the upper support plate 4, and scale indicator arrows can be set on the first mounting platform 8 and the second mounting platform 9. The rotation angle is determined based on the scale before rotation and the scale during rotation. When the alignment error is determined to be less than or equal to 1mm through the track alignment scale line, the drive of the rotating hydraulic cylinder 5 is stopped, and the hydraulic positioning pin 6 is controlled to insert into the pin hole 7 to complete the locking of the turntable body. In practice, an angle sensor can also be set to synchronously display the rotation angle of the turntable body to achieve a comprehensive judgment of the track alignment status. For example, an INC5701D-360-SA-U magnetoresistive angle sensor can be installed on the base 1 on one side of the turntable body to achieve angle measurement.

[0024] The rotary hydraulic cylinder 5 is connected to the downhole emulsion pump station via a hydraulic valve group and a high-pressure hose. The hydraulic valve group includes a manual directional valve and a flow regulating valve. The manual directional valve is used to control the rotation direction of the rotary hydraulic cylinder, and the flow regulating valve regulates the rotation speed of the rotary hydraulic cylinder.

[0025] The hydraulic valve assembly also includes a hydraulic lock and an overload relief valve. The hydraulic lock is connected in series in the oil inlet line of the rotary hydraulic cylinder 5, and the overload relief valve is connected in parallel in the oil outlet line of the hydraulic valve assembly.

[0026] The hydraulic valve group also includes a trolley reversing valve. The trolley cylinder is connected to the downhole emulsion pump station via a branch high-pressure hose and the trolley reversing valve. A one-way throttle valve is connected in series on the branch high-pressure hose to adjust the moving speed of the push plate. The trolley reversing valve can be a two-position five-way solenoid valve.

[0027] There are two hydraulic positioning pins 6, which are symmetrically distributed at 180° along the center of the turntable body. The number of corresponding pin holes 7 can be determined according to the track change requirements. For example, if only a 180° turn is required, two pin holes 7 are also evenly distributed at 180° along the center of the turntable body. If a 90° turn is also required, four pin holes 7 can be evenly distributed at 90° along the center of the turntable body.

[0028] During use, first check if the emulsion pump station pressure is normal, and purge the air from the high-pressure hose and branch high-pressure hoses to ensure the hoses are full of emulsion, then stand by; after the mine car that needs to switch tracks passes the hydraulic trolley device and moves to one side of the turntable body, the operator raises the limit baffle, and then controls the trolley cylinder to move the push plate through the trolley reversing valve. When the limit baffle contacts the rear of the mine car, the mine car is gradually pushed into the turntable body. After it is in place, the trolley cylinder resets; drive the rotating hydraulic cylinder to rotate the turntable body along the circular track.

[0029] During rotation, the alignment status of the track is determined by observing the alignment scale line. Once aligned, the manual reversing valve is closed, and the hydraulic positioning pin is inserted into the positioning pin hole to lock the turntable body.

[0030] Operate the hydraulic pusher device on the second mounting platform behind the mine car. The pusher cylinder drives the pusher plate to move, ultimately pushing the mine car out of the turntable body. After pushing it into place, control the pusher cylinder to reset, completing the track changing operation. During operation, if the pressure in the hose exceeds 45MPa, the overload relief valve will automatically release pressure. When the emulsion pump station stops, the hydraulic lock will lock the position of the rotating hydraulic cylinder to prevent the turntable body from rotating accidentally. The one-way throttle valve can adjust the moving speed of the pusher plate according to the weight of the mine car to avoid the mine car shaking due to excessive pushing speed.

[0031] This utility model's technical solution achieves automatic turntable switching and automatic mine car pushing through hydraulic drive, further reducing labor intensity and improving the continuity and efficiency of the transportation process; it comprehensively ensures operational safety, track docking accuracy, and mine car pushing stability; at the same time, it is compatible with existing underground emulsion systems, has low manufacturing costs, is easy to install, and can be widely used in underground rail transportation scenarios in coal mines, especially suitable for working faces with large transportation volumes and frequent mine car turnover.

[0032] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A hydraulically powered rotary disc track for use in a coal mine, characterised in that, The device includes a base, a turntable body, and a hydraulic trolley device. The base has a ring-shaped guide rail on its top. The turntable body includes a bottom connecting plate that rotates with the base via the ring-shaped guide rail, and an upper support plate concentrically fixed to the bottom connecting plate. A rotary hydraulic cylinder is located on the base below the bottom connecting plate, and is driven by the bottom connecting plate. A hydraulic positioning pin is located on the base below the bottom connecting plate, and the bottom connecting plate has pin holes that mate with the hydraulic positioning pin. A first mounting platform for supporting the incoming mine car track is located on the outside of the turntable body on the base. A second mounting platform is located on the side of the base opposite the mine car track after the turntable body is switched. The upper support plate has a turntable track that can connect with the mine car track. The hydraulic trolley device is mounted on the first and second mounting platforms.

2. The hydraulic rotary disc track for use in a coal mine shaft according to claim 1, characterised in that, The hydraulic trolley device includes a fixed plate, on which a trolley cylinder is mounted pointing towards the center of the upper support plate. A push plate is connected to the piston rod of the trolley cylinder, and a limit baffle is rotatably mounted at one end of the push plate near the upper support plate.

3. The hydraulic rotary disc track for use in a coal mine shaft according to claim 1, characterised in that, The upper support plate, the first installation platform, and the second installation platform are equipped with track alignment scale lines.

4. The hydraulic rotary table system for underground coal mines according to claim 2, characterized in that, The rotary hydraulic cylinder is connected to the downhole emulsion pump station via a hydraulic valve assembly and a high-pressure hose. The hydraulic valve assembly includes a manual directional valve and a flow regulating valve.

5. The hydraulically powered rotary disc track for use in a coal mine tunnel according to claim 4, characterised in that, The hydraulic valve assembly also includes a hydraulic lock and an overload relief valve. The hydraulic lock is connected in series in the oil inlet line of the rotary hydraulic cylinder, and the overload relief valve is connected in parallel in the oil outlet line of the hydraulic valve assembly.

6. The hydraulically powered rotary disc road for use in coal mine shafts according to claim 4, characterised in that, The hydraulic valve group also includes a trolley reversing valve. The trolley cylinder is connected to the downhole emulsion pump station via a branch high-pressure hose and the trolley reversing valve. A one-way throttle valve is connected in series on the branch high-pressure hose.

7. The hydraulic rotary disc track for use in underground coal mines according to claim 1, characterized in that, There are two hydraulic positioning pins, which are symmetrically distributed at 180° along the center of the turntable body.

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