Crawler drill capable of automatically installing gas drainage pipe

Abstract

The present application belongs to the field of coal mine drilling, and particularly relates to a crawler drill capable of automatically installing a gas drilling drainage pipe, comprising a walking mechanism, a working mechanism and a control console, a sliding rail is fixed on a support sliding frame below a centralizer of the working mechanism, an automatic pipe feeding device is slidably connected to the sliding rail, a shell of the automatic pipe feeding device is provided with a pipe inlet and a pipe outlet, a hydraulic motor and a speed reducer are installed on the shell; a small belt conveyor A and a small belt conveyor B are arranged inside the shell, the speed reducer is connected to an output shaft of the small belt conveyor A, and a gap between annular conveyors on sides of the small belt conveyor A and the small belt conveyor B is slid with respect to the small belt conveyor B. The crawler drill of the present application can automatically deliver the drainage pipe through the automatic pipe feeding device, without manual delivery, thereby significantly reducing the labor intensity of pipe lifting during the delivery process of workers, and improving the work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of coal mine drilling, and in particular relates to a crawler drilling rig that can automatically install gas borehole drainage pipes. Background Technology

[0002] Methane gas is one of the main harmful gases in underground coal mines. Its accumulation can easily lead to explosions. Actively extracting methane gas from dangerous areas such as coal seams and goafs through methane drainage pipes directly reduces the methane concentration in the working face and roadways. This is the most fundamental and effective measure to prevent methane explosions and asphyxiation accidents. Therefore, to prevent methane accidents, the "extraction before mining" method is currently adopted. Methane drainage pipes are key equipment used for methane drainage in underground mining projects such as coal mines. Their main function is to safely and efficiently export methane gas from the coal seam to the surface or designated treatment area by laying methane drainage pipes in boreholes, thereby reducing the methane concentration in the mine and preventing methane explosions and other safety accidents.

[0003] Each gas drainage pipe is typically 4-10 meters long. These pipes are connected at the borehole opening and delivered into the borehole, connecting to the surface or underground gas drainage network of the coal mine, and finally to the drainage pump station for negative pressure drainage. Although coal mines are becoming increasingly mechanized, the delivery of gas drainage pipes is still primarily manual. This is mainly due to the unique working environment underground. Because of the narrow tunnels and height limitations, large machinery cannot be easily deployed. Therefore, most pipe delivery still relies on manual labor. Some boreholes are 400-500 meters deep, requiring the manual delivery of hundreds of pipes. This results in high labor intensity and low efficiency for workers, a major pain point in current coal mine drainage operations. Summary of the Invention

[0004] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a tracked drilling rig that can automatically install gas borehole extraction pipes.

[0005] This invention is achieved through the following technical solution:

[0006] A crawler drilling rig capable of automatically installing gas borehole drainage pipes includes a traveling mechanism, a working mechanism, and a control panel. The working mechanism includes a rotary reducer mounted on a connecting plate. Guide sleeves are provided at both ends of the connecting plate, and the guide sleeves are slidably connected to a lifting column. The connecting plate is connected to a first hydraulic cylinder mounted on the chassis of the crawler drilling rig. A support slide is mounted on the rotary reducer, and a power head is slidably mounted on the lower part of the support slide. A stabilizer, a clamp, and a blowout preventer are sequentially arranged from bottom to top on the upper part of the support slide. A slide rail is fixed on the support slide below the stabilizer, and the slide rail is perpendicular to the support slide. An automatic pipe feeding device is slidably connected to the slide rail. The outer surface of the housing of the automatic pipe feeding device is fixed to the piston rod end of a second hydraulic cylinder. The second hydraulic cylinder is fixed to the support... On the support frame, the support frame is fixed on the support slide; the lower surface of the housing of the automatic pipe feeding device is provided with a pipe inlet, and the upper surface of the housing is provided with a pipe outlet corresponding to the pipe inlet. A hydraulic motor is installed on the outer side of the housing, and the hydraulic motor is connected to a reducer; inside the housing of the automatic pipe feeding device, there are small belt conveyors A and B. The reducer is connected to the output shaft of small belt conveyor A. The gap between the annular conveyor belts on the sides of small belt conveyors A and B corresponds to the pipe inlet; small belt conveyor A is installed on the inner wall of the housing. A guide rail and a third hydraulic cylinder are fixed on the inner wall of the housing. A slider seat is provided on the guide rail. The slider seat is fixedly connected to small belt conveyor B. The piston rod end of the third hydraulic cylinder is fixed together with the slide block.

[0007] Preferably, guide plates are symmetrically provided on the inner wall of the housing opposite the inlet, and the distance between the guide plates is greater than the diameter of the extraction pipe.

[0008] Preferably, the guide plate is funnel-shaped.

[0009] Preferably, the hydraulic circuit of the third hydraulic cylinder is equipped with a sensing block, which is connected to a load sensing system. The load sensing system transmits the clamping force on the extraction and release tube to the control system of the control panel, and the clamping force can be adjusted through the control panel.

[0010] The crawler drilling rig of the present invention integrates the automatic pipe feeding device with the working mechanism. After the crawler drilling rig completes drilling, the automatic pipe feeding device can automatically deliver the extraction pipe without manual delivery, which significantly reduces the labor intensity of workers lifting pipes during the delivery process and improves work efficiency. The automatic pipe feeding device of the present invention is integrated on the support slide of the working mechanism, which has a compact structure, occupies little space, and can cooperate with the stabilizer and clamp of the working mechanism. The pipe feeding angle can always be kept consistent with the drilling angle without manual adjustment of the pipe feeding angle, making the delivery of extraction pipes more accurate. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the crawler drilling rig in this embodiment;

[0012] Figure 2 This is a schematic diagram of the side structure of the crawler drilling rig in this embodiment;

[0013] Figure 3 This is a schematic diagram of the structure of the crawler drilling rig during inclined drilling in this embodiment;

[0014] Figure 4 for Figure 3 Rear structure diagram;

[0015] Figure 5 This is a schematic diagram of the supporting carriage structure in this embodiment;

[0016] Figure 6 This is a side view of the supporting carriage structure in this embodiment;

[0017] Figure 7 This is a schematic diagram of the structure supporting the tilted carriage in this embodiment;

[0018] Figure 8 This is a schematic diagram of the automatic pipe feeding device in this embodiment;

[0019] Figure 9 This is a schematic diagram of the internal structure of the automatic pipe feeding device in this embodiment;

[0020] Figure 10 This is a schematic diagram of the internal structure of the automatic pipe feeding device in this embodiment from another angle;

[0021] Figure 11 This is a schematic diagram of the internal guide rail structure of the automatic pipe feeding device in this embodiment.

[0022] In the diagram, 1 is the rotary reducer, 2 is the connecting plate, 3 is the guide sleeve, 4 is the lifting column, 5 is the first hydraulic cylinder, 6 is the support slide, 7 is the power head, 8 is the centralizer, 9 is the clamp, 10 is the blowout preventer, 11 is the slide rail, 12 is the housing, 13 is the second hydraulic cylinder, 14 is the support frame, 15 is the inlet pipe, 16 is the outlet pipe, 17 is the hydraulic motor, 18 is the reducer, 19 is the small belt conveyor A, 20 is the small belt conveyor B, 21 is the output shaft, 22 is the ring conveyor belt, 23 is the guide rail, 24 is the third hydraulic cylinder, 25 is the slider seat, and 26 is the guide plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0024] This embodiment includes a tracked drilling rig. A conventional tracked drilling rig mainly consists of three parts: a traveling mechanism, a working mechanism, and a control panel. The traveling mechanism is primarily responsible for the movement, steering, and positioning of the entire tracked drilling rig at the construction site. The traveling mechanism includes a tracked chassis, which uses hydraulic drive to achieve stepless speed regulation, smooth start-stop, and on-the-spot steering. It also has outrigger cylinders that extend and compact the ground during drilling operations, lifting the rig off the ground to form a highly stable working platform, eliminating sway and ensuring drilling accuracy. The working mechanism is the core operating part of the tracked drilling rig, used to directly perform drilling, impact, and other construction operations. The working mechanism includes a rotary reducer 1, which adjusts the drilling angle and drives all components of the working mechanism to rotate together, ensuring that all components rotate at the same angle. A rotary reducer 1 is mounted on a connecting plate 2. Guide sleeves 3 are provided at both ends of the connecting plate 2, and the guide sleeves 3 are slidably connected to the lifting column 4. The connecting plate 2 is connected to a first hydraulic cylinder 5 mounted on the crawler drilling rig chassis. The first hydraulic cylinder 5 controls the connecting plate 2 to move up and down along the lifting column 4, thereby allowing the rotary reducer 1 to move up and down, adjusting the height of the working mechanism. A support slide 6 is mounted on the rotary reducer 1. A power head 7 is slidably mounted on the lower part of the support slide 6. The power head 7 is slidably connected to the support slide 6 via a mounting seat. The mounting seat is driven by a hydraulic cylinder to slide along the support slide 6. The power head 7 is one of the core components of the working mechanism, providing the torque and speed required for drilling, and is hydraulically driven. The upper part of the support carriage 6, from bottom to top, is equipped with components such as a centralizer 8, a clamp 9, and a blowout preventer 10. The centralizer 8 provides additional support for the drill rod, forcing it to be centered in the borehole, ensuring borehole verticality and making the drilling process smoother. The clamp 9 firmly holds the drill rod to prevent it from slipping, playing a crucial safety role. The blowout preventer 10 is used to prevent and control uncontrolled ejection of fluid from the borehole, ensuring the safety of personnel and equipment. The rotation of the rotary reducer 1 drives the support carriage 6 to rotate, simultaneously driving the power head 7, centralizer 8, clamp 9, blowout preventer 10, and other components to rotate together, as shown in the attached diagram. Figure 1 and 2 The image shows the working mechanism drilling vertically upwards; see attached image. Figure 3 and 4 As shown, the working mechanism is drilling upwards at a certain angle. The control panel is the human-machine interface, and all power systems, hydraulic systems, and control systems are connected to and controlled through the control panel. The above is the conventional structure of existing crawler drilling rigs, and its structure and principle will not be described in detail here. This invention integrates an automatic pipe delivery and extraction device into the existing crawler drilling rig, which will be described in detail below.

[0025] A slide rail 11 is fixed on the support slide 6, perpendicular to the support slide 6, and located below the centralizer 8 and above the power head 7. An automatic pipe feeding device is slidably connected to the slide rail 11. The automatic pipe feeding device includes a housing 12, with an inlet 15 on the lower surface of the housing 12 and an outlet 16 corresponding to the inlet 15 on the upper surface of the housing 12. The inlet 15 and outlet 16 are used to allow the extraction and discharge pipes to enter and exit the automatic pipe feeding device. The housing 12 is fixed to a slide block, which is slidably connected to the slide rail 11. The outer surface of the housing 12 is fixed to the piston rod end of the second hydraulic cylinder 13, which is fixed to a support frame 14, which is fixed to the support slide 6. The automatic pipe feeding device is controlled by the second hydraulic cylinder 13 to slide along the slide rail 11, so that the outlet 16 is directly opposite the inlet of the centralizer 8. A hydraulic motor 17 is installed on the outer surface of the housing 12, and the hydraulic motor 17 is connected to a reducer 18.

[0026] Inside the housing 12 of the automatic pipe feeding device, there are parallel small belt conveyors A19 and B20. Small belt conveyors A19 and B20 can be conventional annular belt conveyors. A conventional annular belt conveyor structure includes an annular conveyor belt 22, an output shaft 21, rollers, a tensioning structure, etc. In this invention, the annular conveyor belt 22 of small belt conveyors A19 and B20 is located on the side, meaning the annular conveyor belt 22 wraps around the side once, and the annular conveyor belts 22 of both are parallel. The difference between small belt conveyors A19 and B20 is that the output shaft 21 of small belt conveyor A19 is connected to a power source, while the output shaft 21 of small belt conveyor B20 is not connected to a power source. Specifically, the output shaft 21 of small belt conveyor A19 is connected to a reducer 18. The gap between the annular conveyor belts 22 on the side of small belt conveyors A19 and B20 corresponds to the inlet 15 and outlet 16. The extraction pipe enters through the inlet 15, then flows into the gap between the side annular conveyor belts 22 of the small belt conveyors A19 and B20, and finally exits through the outlet 16. To facilitate smoother entry of the extraction pipe into the gap between the annular conveyor belts 22, two guide plates 26 are preferably symmetrically arranged on the inner wall of the housing 12 opposite the inlet 15. The distance between the two guide plates 26 is slightly larger than the diameter of the extraction pipe. Preferably, the two guide plates 26 are funnel-shaped, with a larger opening at the end facing the inlet 15 and a smaller opening at the end facing the outlet 16. This allows the extraction pipe to be fed into the gap between the annular conveyor belts 22 more smoothly.

[0027] To adjust the clamping force of the two annular conveyor belts 22 on the extraction pipes, the small belt conveyor B20 is designed with a sliding structure. The small belt conveyor A19 is fixedly installed on the inner wall of the housing 12 and cannot move. The small belt conveyor B20 can move relative to the small belt conveyor A19, but always remains parallel. Moving the small belt conveyor B20 changes the gap between the small belt conveyor A19 and the annular conveyor belts 22 on its sides, thereby changing the clamping force on the extraction pipes. It can also be used to transport extraction pipes of different diameters; adjusting the position of the small belt conveyor B20 allows for the transport of extraction pipes of different diameters. The sliding structure of the small belt conveyor B20 is as follows: a guide rail 23 and a third hydraulic cylinder 24 are fixed on the inner wall of the housing 12. The guide rail 23 is perpendicular to the small belt conveyor B20 and parallel to the slide rail 11. A slider seat 25 is provided on the guide rail 23, and the slider seat 25 can slide along the guide rail 23. The slider seat 25 is fixedly connected to the small belt conveyor B20. The piston rod end of the third hydraulic cylinder 24 is fixed together with the slider seat 25. The small belt conveyor B20 is driven to slide along the guide rail 23 by the third hydraulic cylinder 24, thereby adjusting the distance between the small belt conveyor B20 and the small belt conveyor A19.

[0028] To more precisely control the clamping force on the extraction and release pipe, preferably, a sensing block is installed in the hydraulic circuit of the third hydraulic cylinder 24. The sensing block is connected to a load-sensing system, which transmits the clamping force of the annular conveyor belt 22 on the extraction and release pipe to the control system of the control panel. The clamping force can be adjusted via the control panel. The aforementioned first hydraulic cylinder 5, second hydraulic cylinder 13, power head 7, centralizer 8, clamp 9, hydraulic motor 17, reducer 18, and third hydraulic cylinder 24 are all connected to the control system of the control panel, allowing for the control and operation of the crawler drilling rig.

[0029] To illustrate the working process of this invention, assuming the drilling is vertical upward drilling, after the working mechanism of the crawler drilling rig finishes drilling, the control power head 7 slides down along the support slide 6 to the bottom. Then, the control second hydraulic cylinder 13 operates to align the outlet 16 of the automatic pipe feeding device with the inlet of the stabilizer 8. The first extraction pipe is manually fed into the automatic pipe feeding device through the lower inlet 15. The extraction pipe enters the housing 12 of the automatic pipe feeding device, passes through the guide plate 26, and enters the gap between the annular conveyor belt 22 of the small belt conveyor A19 and the small belt conveyor B20. The hydraulic motor 17 and the reducer 18 are turned on, and the annular conveyor belt 22 on the side of the small belt conveyor A19 rotates accordingly. The side of the annular conveyor belt 22 on the side of the small belt conveyor A19 closest to the extraction pipe moves towards... During the upward movement, the gap between the annular conveyor belts 22 of small belt conveyors A19 and B20 is adjusted according to the diameter of the extraction pipe. During adjustment, the third hydraulic cylinder 24 is activated to drive small belt conveyor B20 to slide along guide rail 23. The sensing block tests the clamping force of the annular conveyor belt 22 on the extraction pipe. Then, the load-sensitive system transmits this clamping force to the control system of the control panel, and adjusts this clamping force to a suitable value so that the extraction pipe is in contact with the annular conveyor belts 22 on both sides. The clamping force of the annular conveyor belts 22 on both sides on the extraction pipe should not be too large. The extraction pipe should just be able to move upward together with the annular conveyor belt 22 of small belt conveyor A19. Set a suitable clamping force value according to the actual situation, and control the control panel to reach the set clamping force value. In this way, the extraction pipe is automatically conveyed upwards within the automatic pipe feeding device. The upper end of the extraction pipe exits from the outlet 16 of the automatic pipe feeding device and enters the stabilizer 8, then passes sequentially through the clamp 9 and the blowout preventer 10 into the borehole. When the lower end of the first extraction pipe is about to enter the automatic pipe feeding device, the hydraulic motor 17 and the reducer 18 stop working. A second extraction pipe is then manually attached to the lower end of the first extraction pipe. The hydraulic motor 17 and reducer 18 are then activated again to continue feeding the second extraction pipe, and this process is repeated continuously. Throughout the process, workers no longer need to lift and feed the extraction pipes one by one as before, greatly reducing labor intensity and improving pipe feeding efficiency. The above example illustrates a vertically upward borehole. When the borehole has an inclination angle, the pipe feeding can be performed in the same way. Because the rotary reducer 1 rotates, it drives all components on the support slide 6 to rotate at the same angle, including the automatic pipe feeding device. Therefore, the automatic pipe feeding device always maintains the same angle as the borehole, and there is no need to adjust the pipe feeding angle during feeding.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tracked drilling rig capable of automatically installing gas borehole extraction pipes, comprising a traveling mechanism, a working mechanism, and a control panel, wherein the working mechanism includes a rotary reducer mounted on a connecting plate, guide sleeves at both ends of the connecting plate being slidably connected to a lifting column, the connecting plate being connected to a first hydraulic cylinder mounted on the chassis of the tracked drilling rig, a support slide mounted on the rotary reducer, a power head slidably mounted on the lower part of the support slide, and a stabilizer, a clamp, and a blowout preventer sequentially arranged from bottom to top on the upper part of the support slide, characterized in that: A slide rail is fixed on the support slide below the stabilizer. The slide rail is perpendicular to the support slide. An automatic pipe feeding device is slidably connected to the slide rail. The outer surface of the housing of the automatic pipe feeding device is fixed to the piston rod end of the second hydraulic cylinder. The second hydraulic cylinder is fixed to the support frame, and the support frame is fixed to the support slide. The lower surface of the housing of the automatic pipe feeding device has a pipe inlet, and the upper surface of the housing has a pipe outlet corresponding to the pipe inlet. A hydraulic motor is installed on the outer surface of the housing and connected to a reducer. Inside the housing of the automatic pipe feeding device, there are small belt conveyors A and B. The reducer is connected to the output shaft of small belt conveyor A. The gap between the annular conveyor belts on the sides of small belt conveyors A and B corresponds to the pipe inlet. Small belt conveyor A is installed on the inner wall of the housing. A guide rail and a third hydraulic cylinder are fixed on the inner wall of the housing. A slider seat is provided on the guide rail and is fixedly connected to small belt conveyor B. The piston rod end of the third hydraulic cylinder is fixed to the slider block.

2. The crawler drilling rig capable of automatically installing gas borehole drainage pipes according to claim 1, characterized in that: The inlet is symmetrically provided with guide plates on the inner wall of the shell, and the distance between the guide plates is greater than the diameter of the extraction pipe.

3. The crawler drilling rig capable of automatically installing gas borehole extraction pipes according to claim 2, characterized in that: The guide plate is funnel-shaped.

4. The crawler drilling rig capable of automatically installing gas borehole drainage pipes according to claim 1, characterized in that: The third hydraulic cylinder has a sensing block on its hydraulic oil circuit. The sensing block is connected to the load sensing system. The load sensing system transmits the clamping force on the extraction and release tube to the control system of the control panel. The clamping force can be adjusted through the control panel.

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