A small size directional drilling machine with large torque for underground coal mine

Abstract

This utility model provides a high-torque, small-size directional drilling rig for underground coal mines, comprising: a tracked chassis; a feed assembly mounted on top of the tracked chassis; and a hydraulic oil tank. The high-torque, small-size directional drilling rig for underground coal mines provided by this utility model utilizes the coordinated operation of the feed assembly, power head assembly, anchoring support cylinder, and motor pump assembly. The hydraulic motor drives the chuck to rotate via a gearbox. This reduces the overall size while providing suitable drilling torque. Furthermore, since the power head assembly is mounted on top of the feed assembly, the size of the feed assembly can be reduced accordingly. Simultaneously, by connecting the main hydraulic pump and auxiliary hydraulic pump in series and driving them simultaneously with an explosion-proof motor, the size of the entire motor pump assembly is reduced. This allows the drilling rig to smoothly enter the mine through narrow tunnels and cages while maintaining a smaller size, thereby reducing the labor intensity of the workers.

Description

Technical Field

[0001] This utility model relates to the field of drilling rig technology, and in particular to a high-torque, small-size directional drilling rig for use in coal mines. Background Technology

[0002] Despite years of development, the coal mining industry still produces a massive amount of coal. Shallow coal seams can no longer meet domestic demand, making deep coal seam mining the primary objective. Underground tunnel directional drilling rigs are mainly used for water exploration and drainage, gas extraction, roof caving, water injection, and deep geological exploration, making them an indispensable piece of equipment for safe production in coal mines.

[0003] When lowering a drilling rig into the well, a narrow tunnel cage is required for transport. However, the current transport dimensions of narrow tunnel cages are no more than 1.4 meters wide and no more than 1.8 meters high. This makes it impossible to lower a large-torque drilling rig with dimensions of 200×1600×2000 as a whole into the well. The drilling rig needs to be disassembled into parts, lowered into the well, and then reassembled, which increases the labor intensity for workers and avoids problems such as incorrect hydraulic pipeline connections and recalibration of factory parameters. If a small-torque drilling rig is used, the drilling speed will be slow, the feed stroke will be short, and the drilling depth will be shallow.

[0004] Therefore, it is necessary to provide a high-torque, small-size directional drilling rig for underground coal mines to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a high-torque, small-size directional drilling rig for underground coal mines, which solves the problems of needing to disassemble and transport the entire machine and then reinstall it to increase the pulling strength when using a high-torque drilling rig, and the slow drilling speed, short feed stroke, and shallow drilling depth when using a low-torque drilling rig.

[0006] To solve the above-mentioned technical problems, this utility model provides a high-torque, small-size directional drilling rig for underground coal mines, comprising:

[0007] Tracked chassis;

[0008] A feed assembly is disposed on top of the tracked chassis;

[0009] A hydraulic oil tank is disposed on top of the tracked chassis;

[0010] An electric motor pump assembly is disposed on top of the tracked chassis;

[0011] A control panel assembly is disposed on top of the tracked chassis;

[0012] Anchoring support cylinders are respectively installed on both sides of both ends of the tracked chassis;

[0013] A power head assembly is disposed on top of the feed assembly.

[0014] Preferably, the power head assembly includes a hydraulic motor, a gearbox, an axle brake, and a chuck. The input end of the gearbox is fixedly mounted to the output end of the hydraulic motor, one side of the chuck is fixedly mounted to the output end of the gearbox, and the axle brake is disposed on one side of the chuck.

[0015] Preferably, the motor-pump assembly includes an explosion-proof motor, a main hydraulic pump, and an auxiliary hydraulic pump. The explosion-proof motor and the main hydraulic pump are fixedly connected, and the main hydraulic pump and the auxiliary hydraulic pump are connected in series.

[0016] Preferably, the bottom of the gearbox is fixedly mounted on the moving end of the feed assembly, and the bottom of the explosion-proof motor is fixedly mounted on the top of the tracked chassis.

[0017] Preferably, a pad is fixedly installed at the moving end of the anchoring support cylinder, and both ends of the pad are provided with sliding grooves.

[0018] Preferably, an extension plate is slidably connected to the inner side of the groove, and an extension support plate is fixedly installed at one end of the extension plate.

[0019] Preferably, the bottom of the extension support plate is flush with the bottom of the pad.

[0020] Compared with related technologies, the high-torque, small-size directional drilling rig for underground coal mines provided by this utility model has the following advantages:

[0021] This utility model provides a high-torque, small-size directional drilling rig for underground coal mines. Through the coordinated operation of a feed assembly, power head assembly, anchoring support cylinder, and motor pump assembly, the hydraulic motor drives the chuck to rotate via a gearbox. This reduces the overall size while providing suitable drilling torque. Furthermore, since the power head assembly is mounted on top of the feed assembly, the size of the feed assembly can be reduced accordingly. Simultaneously, by connecting the main hydraulic pump and auxiliary hydraulic pump in series and driving them simultaneously with an explosion-proof motor, the size of the entire motor pump assembly is reduced. This allows the drilling rig to smoothly enter the mine through narrow tunnels and cages despite its reduced size, thereby reducing the labor intensity of workers while still providing significant torque, increasing drilling speed, feed stroke, and drilling depth. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a first embodiment of a high-torque, small-size directional drilling rig for underground coal mines provided by this utility model;

[0023] Figure 2 for Figure 1 The diagram shows the front structure.

[0024] Figure 3 for Figure 1 The diagram shows a top view of the structure.

[0025] Figure 4 for Figure 1 The diagram shows the structure of the motor pump assembly.

[0026] Figure 5 for Figure 1 The diagram shows the structure of the power head assembly;

[0027] Figure 6 A schematic diagram of the structure of a second embodiment of a high-torque, small-size directional drilling rig for underground coal mines provided by this utility model;

[0028] Figure 7 for Figure 6 The diagram shows the side structure of the pad.

[0029] Numbered in the diagram: 1. Tracked chassis, 2. Feed assembly, 3. Power head assembly, 31. Hydraulic motor, 32. Gearbox, 33. Axle brake, 34. Chuck, 4. Anchor support cylinder, 5. Hydraulic tank, 6. Motor pump assembly, 61. Explosion-proof motor, 62. Main hydraulic pump, 63. Auxiliary hydraulic pump, 7. Control panel assembly, 8. Pad, 81. Slide groove, 82. Extension plate, 83. Extension support plate. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] First Embodiment

[0032] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a high-torque, small-size directional drilling rig for underground coal mines provided by this utility model; Figure 2 for Figure 1 The diagram shows the front structure. Figure 3 for Figure 1 The diagram shows a top view of the structure. Figure 4 for Figure 1 The diagram shows the structure of the motor pump assembly. Figure 5 for Figure 1 The diagram shows the structure of the power head assembly. A high-torque, small-size directional drilling rig for underground coal mines includes: a tracked chassis 1;

[0033] Feeding assembly 2, which is disposed on the top of the tracked chassis 1;

[0034] Hydraulic oil tank 5, which is located on top of the tracked chassis 1;

[0035] The motor pump assembly 6 is disposed on the top of the tracked chassis 1;

[0036] The control panel assembly 7 is disposed on the top of the tracked chassis 1;

[0037] Anchoring support cylinder 4, the anchoring support cylinder 4 is respectively disposed on both sides of both ends of the track chassis 1;

[0038] The power head assembly 3 is disposed on top of the feed assembly 2.

[0039] The power head assembly 3 includes a hydraulic motor 31, a gearbox 32, an axle brake 33, and a chuck 34. The input end of the gearbox 32 is fixedly installed on the output end of the hydraulic motor 31, one side of the chuck 34 is fixedly installed on the output end of the gearbox 32, and the axle brake 33 is disposed on one side of the chuck 34.

[0040] The motor-pump assembly 6 includes an explosion-proof motor 61, a main hydraulic pump 62, and an auxiliary hydraulic pump 63. The explosion-proof motor 61 and the main hydraulic pump 62 are fixedly connected, and the main hydraulic pump 62 and the auxiliary hydraulic pump 63 are connected in series.

[0041] The bottom of the gearbox 32 is fixedly installed on the moving end of the feed assembly 2, and the bottom of the explosion-proof motor 61 is fixedly installed on the top of the tracked chassis 1.

[0042] The gearbox 32 is a two-stage reduction mechanism, including planetary reduction and helical gear reduction;

[0043] The power head assembly 3 is connected to the feed mechanism 2 via a guide rod. The feed mechanism 2, hydraulic oil tank 5, motor pump assembly 6, and control panel assembly 7 are mounted on the platform of the tracked chassis 1. The anchoring support cylinder 4 is fixed to both sides of the platform of the tracked chassis 1 with high-strength bolts. When the transport length is limited, it can be disassembled to shorten the overall length. The explosion-proof motor 61 is directly connected to the main hydraulic pump 62 via a spline sleeve and is directly driven. It is fixedly connected to the external bell housing and hydraulic main pump of a conventional motor. The internal motor is connected to the hydraulic main pump via a coupling, saving 600mm of space. The main hydraulic pump 62 and the auxiliary hydraulic pump 63 are connected in series and are simultaneously driven by the explosion-proof motor 61. The chuck 34 is rotated via the gearbox 32. The output torque of the power head assembly 3 is 15000 Nm. The magnitude of the output torque is related to the displacement of the hydraulic motor 31 and the reduction ratio of the gearbox 32. Using one large-displacement hydraulic motor 31 and matching it with a gearbox 32 with a suitable reduction ratio achieves the required output torque. Using two low-displacement hydraulic motors 31 and matching them with gearboxes 32 with suitable reduction ratios achieves the required output torque. The overall size of the power head assembly is 200 mm smaller, saving space. The power head assembly 3 is installed on the feed mechanism 2. The reduced size of the power head assembly 3 corresponds to a reduced size of the feed mechanism 2, saving space for the entire machine.

[0044] The working principle of the high-torque, small-size directional drilling rig for underground coal mines provided by this utility model is as follows:

[0045] During operation, the drilling rig is moved to a suitable position via the tracked chassis 1. Then, the anchor support cylinder 4 is moved downwards via the control panel assembly 7 to limit the drilling rig. Next, the power head assembly 3 is moved, and the hydraulic oil inside the hydraulic tank 5 is extracted and delivered to the feed assembly 2 via the motor pump assembly 6. This causes the feed assembly 2 to push the power head assembly 3 to move, thus completing the drilling process.

[0046] Compared with related technologies, the high-torque, small-size directional drilling rig for underground coal mines provided by this utility model has the following advantages:

[0047] Through the coordinated operation of the feed assembly 2, power head assembly 3, anchor support cylinder 4, and electric pump assembly 6, the hydraulic motor 31 can drive the chuck 34 to rotate via the gearbox 32. In this way, while reducing the size, it can still provide suitable drilling torque. Moreover, since the power head assembly 3 is mounted on the feed assembly 2, the size of the feed assembly 2 can be reduced accordingly. At the same time, the main hydraulic pump 62 and the auxiliary hydraulic pump 63 are connected in series and driven by the explosion-proof motor 61, thereby reducing the size of the entire electric pump assembly 6. In this way, the drilling rig can smoothly enter the mine through narrow tunnel cages with a reduced size, thereby reducing the labor intensity of the workers, while still providing greater torque, increasing drilling speed, feed stroke, and drilling depth.

[0048] Second Embodiment

[0049] Please refer to the following: Figure 6 and Figure 7 Based on the first embodiment of this application which provides a high-torque, small-size directional drilling rig for underground coal mines, the second embodiment of this application proposes another high-torque, small-size directional drilling rig for underground coal mines. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0050] Specifically, the second embodiment of this application provides a high-torque, small-size directional drilling rig for underground coal mines, in which a pad 8 is fixedly installed on the moving end of the anchoring support cylinder 4, and both ends of the pad 8 are provided with sliding grooves 81.

[0051] An extension plate 82 is slidably connected to the inner side of the slide groove 81, and an extension support plate 83 is fixedly installed at one end of the extension plate 82.

[0052] The bottom of the extension support plate 83 is flush with the bottom of the pad plate 8.

[0053] When in use, the extension plate 82 can slide on the inner side of the slide groove 81, and a limiting structure is provided on the inner side of the slide groove 81 to limit the extension plate 82 and prevent the extension plate 82 from moving completely out of the inner side of the slide groove 81.

[0054] The working principle of the high-torque, small-size directional drilling rig for underground coal mines provided by this utility model is as follows:

[0055] When it is necessary to limit the directional drilling rig, the user first pulls the extension support plate 83, which causes the extension support plate 82 to slide on the inner side of the slide groove 81, thereby moving the extension support plate 83 away from the pad plate 8. Then, the user activates the anchoring support cylinder 4, which causes the anchoring support cylinder 4 to move the pad plate 8 downward, so that the extension support plate 83 and the pad plate 8 come into contact with the ground, thereby limiting the directional drilling rig.

[0056] Compared with related technologies, the high-torque, small-size directional drilling rig for underground coal mines provided by this utility model has the following advantages:

[0057] The structure, consisting of pad 8, slide 81, extension plate 82, and extension support plate 83, works together. When in use, the user pulls the extension support plate 83, causing the extension plate 82 to slide on the inner side of the slide 81, thereby moving the extension support plate 83 away from the pad 8, thus increasing the support range and improving the stability of the support.

[0058] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-torque, small-size directional drilling rig for underground coal mines, characterized in that, include: Tracked chassis; A feed assembly is disposed on top of the tracked chassis; A hydraulic oil tank is disposed on top of the tracked chassis; An electric motor pump assembly is disposed on top of the tracked chassis; A control panel assembly is disposed on top of the tracked chassis; Anchoring support cylinders are respectively installed on both sides of both ends of the tracked chassis; A power head assembly, wherein the power head assembly is disposed on top of the feed assembly; The moving end of the anchoring support cylinder is fixedly installed with a pad, and both ends of the pad are provided with sliding grooves. An extension plate is slidably connected to the inner side of the groove, and an extension support plate is fixedly installed at one end of the extension plate. The bottom of the extended support plate is flush with the bottom of the pad.

2. The high-torque, small-size directional drilling rig for underground coal mines according to claim 1, characterized in that, The power head assembly includes a hydraulic motor, a gearbox, an axle brake, and a chuck. The input end of the gearbox is fixedly installed at the output end of the hydraulic motor, one side of the chuck is fixedly installed at the output end of the gearbox, and the axle brake is disposed on one side of the chuck.

3. The high-torque, small-size directional drilling rig for underground coal mines according to claim 2, characterized in that, The motor-pump assembly includes an explosion-proof motor, a main hydraulic pump, and an auxiliary hydraulic pump. The explosion-proof motor and the main hydraulic pump are fixedly connected, and the main hydraulic pump and the auxiliary hydraulic pump are connected in series.

4. A high-torque, small-size directional drilling rig for underground coal mines according to claim 3, characterized in that, The bottom of the gearbox is fixedly installed on the moving end of the feed assembly, and the bottom of the explosion-proof motor is fixedly installed on the top of the tracked chassis.

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