A coal mine gas extraction device

Abstract

This application provides a coal mine gas extraction device, relating to the field of gas extraction technology. It includes a mounting frame, a mounting plate, a drill rod, an extension rod, a lifting assembly, and a rotating assembly. The lifting assembly is mounted on the mounting frame and is used to move the mounting plate up and down. The extension rod is rotatably mounted on the mounting plate via bearings. The rotating assembly is mounted on the mounting plate and is used to rotate the extension rod. The drill rod is slidably sleeved on the extension rod. A first locking assembly is provided between the top of the extension rod and the drill rod, and a second locking assembly is provided between the bottom of the extension rod and the drill rod. The interiors of both the drill rod and the extension rod are hollow, and a through hole is provided at the bottom of the drill rod. By using hollow extension rods and drill rods, and inserting extraction pipes into the extension rods and drill rods, friction between the extraction pipes and the borehole wall is prevented.

Description

Technical Field

[0001] This application relates to the field of gas extraction technology, and more specifically, to a coal mine gas extraction device. Background Technology

[0002] Coal mine gas extraction involves drilling into the coal seam and gas accumulation areas, connecting the borehole to a dedicated pipeline, and using extraction equipment to pump the gas from the coal seam and goaf to the surface for utilization or discharge into the main return airflow. Gas extraction is not only an important measure to reduce gas emissions during mining, prevent gas exceedances and accumulation, and prevent gas explosions and coal and gas outbursts, but it can also turn a hazard into a benefit by developing and utilizing it as a resource associated with coal.

[0003] Existing coal mine gas drainage devices have the following problems in actual use: First, due to the uneven distribution of gas accumulation locations in the mine, drilling operations at different depths are required during drainage. However, when the existing drainage pipes are directly inserted into the borehole, they are prone to friction with the borehole wall, leading to wear on the surface of the drainage pipes and affecting their service life. Second, when deeper gas drainage is required, the existing devices lack a convenient drill rod extension function, making it impossible to flexibly adjust the drill rod length, which limits the drainage depth and affects the gas drainage efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a coal mine gas extraction device that can solve the technical problems of existing coal mine gas extraction devices, such as the easy friction between the extraction pipe and the borehole wall when the extraction pipe is directly inserted into the borehole, resulting in wear and affecting the service life; and the lack of convenient drill rod extension function, which makes it impossible to flexibly adjust the length, limits the extraction depth, and affects efficiency.

[0005] This application provides a coal mine gas extraction device, including a mounting frame, a mounting plate, a drill rod, an extension rod, a lifting assembly, and a rotating assembly. The lifting assembly is mounted on the mounting frame and is used to move the mounting plate up and down. The extension rod is rotatably mounted on the mounting plate via a bearing. The rotating assembly is mounted on the mounting plate and is used to rotate the extension rod. The drill rod is slidably sleeved on the extension rod. A first locking assembly is provided between the top of the extension rod and the drill rod, and a second locking assembly is provided between the bottom of the extension rod and the drill rod. The interiors of the drill rod and the extension rod are both hollow, and a through hole is provided at the bottom of the drill rod.

[0006] The first locking assembly includes a locking bolt, a locking hole is provided at the top of the drill rod, and a threaded hole is provided at the top of the extension rod. The locking bolt can pass through the locking hole and be threaded into the threaded hole.

[0007] The second locking assembly includes a locking block, a connecting plate, and an elastic element. A limiting hole is provided at the bottom of the extension rod. The locking block is slidably disposed in the limiting hole and can be inserted into the locking hole and engaged with it. The connecting plate is fixedly disposed at the end of the locking block away from the locking hole. The elastic element is pre-pressed between the connecting plate and the inner wall of the extension rod.

[0008] The drill rod has a limiting groove on its inner wall, and the locking block is slidably positioned within the limiting groove.

[0009] The first locking component and the second locking component are provided in multiple quantities, and the multiple first locking components and the multiple second locking components are evenly distributed around the extension rod.

[0010] The lifting assembly includes a first motor, a screw, and a slide rod. The screw is rotatably mounted on the mounting frame via a bearing. The first motor drives the screw to rotate. The slide rod is fixedly mounted on the mounting frame. The mounting plate is threaded onto the screw and slidably mounted on the slide rod.

[0011] The rotating assembly includes a second motor, a first gear, and a second gear. The first gear is rotatably mounted on the mounting plate via a bearing. The second motor drives the first gear to rotate via an output shaft. The second gear is fixedly sleeved on the extension rod and meshes with the first gear.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides a coal mine gas extraction device. The device incorporates a hollow extension rod and a drill rod, with the extraction pipe inserted into both. This prevents friction between the extraction pipe and the borehole wall, extending its service life. A through hole at the bottom of the drill rod facilitates gas extraction operations. The extension rod allows for extending the drill rod length and increasing the borehole depth to meet extraction needs at different depths, improving the device's applicability. Furthermore, the first and second locking components facilitate quick assembly, disassembly, and locking of the extension rod, enhancing ease of use. Before extending the drill rod, the extension rod retracts inside, reducing space occupation and making it easy to carry and use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the extension rod in its retracted state in some embodiments of this application;

[0016] Figure 2 This is a schematic diagram of the overall structure of the extension rod in the extended state in some embodiments of this application;

[0017] Figure 3 This is a cross-sectional view of the extension rod and drill rod structure in the retracted state of some embodiments of this application;

[0018] Figure 4 This is a cross-sectional view of the extension rod and drill rod structure in the extended rod extended state in some embodiments of this application;

[0019] Figure 5 for Figure 3 Enlarged structural diagram at point A;

[0020] Figure 6 for Figure 3 Enlarged structural diagram at point B;

[0021] Figure 7 for Figure 4 Enlarged structural diagram at point C.

[0022] The reference numerals in the attached figures are as follows:

[0023] 1. Mounting bracket;

[0024] 2. Mounting plate;

[0025] 3. Drill rod; 31. Through hole; 32. Locking hole; 33. Limiting groove;

[0026] 4. Extension rod; 41. Threaded hole; 42. Limiting hole;

[0027] 5. Lifting assembly; 51. First motor; 52. Screw; 53. Slide rod;

[0028] 6. Rotating assembly; 61. Second motor; 62. First gear; 63. Second gear;

[0029] 7. First locking assembly; 71. Locking bolt;

[0030] 8. Second locking assembly; 81. Locking block; 82. Connecting plate; 83. Elastic element. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] like Figures 1 to 7 As shown in the figure, this application provides a coal mine gas extraction device, including a mounting frame 1, a mounting plate 2, a drill rod 3, an extension rod 4, a lifting assembly 5, and a rotating assembly 6. The lifting assembly 5 is mounted on the mounting frame 1 and is used to drive the mounting plate 2 to move up and down. The extension rod 4 is rotatably mounted on the mounting plate 2 through a bearing. The rotating assembly 6 is mounted on the mounting plate 2 and is used to drive the extension rod 4 to rotate. The drill rod 3 is slidably sleeved on the extension rod 4. A first locking assembly 7 is provided between the top of the extension rod 4 and the drill rod 3, and a second locking assembly 8 is provided between the bottom of the extension rod 4 and the drill rod 3. The interior of the drill rod 3 and the interior of the extension rod 4 are both hollow, and a through hole 31 is provided at the bottom of the drill rod 3.

[0038] In use, the extension rod 4 retracts into the drill rod 3, and the extension rod 4 and the drill rod 3 are locked and fixedly connected by the first locking assembly 7. The extension rod 4 is rotated by the rotating assembly 6, which in turn rotates the drill rod 3. At the same time, the mounting plate 2 is moved down by the lifting assembly 5, which in turn moves the drill rod 3 down. Drilling is performed during the rotation and downward movement of the drill rod 3. Then, the external extraction pipe is inserted into the extension rod 4 and the drill rod 3. The external air pump is then turned on, and gas extraction can be performed through the extraction pipe. When it is necessary to deepen the drilling depth, the locking and fixing connection between the extension rod 4 and the drill rod 3 by the first locking assembly 7 is released. Then, the mounting plate 2 is moved up by the lifting assembly 5, which moves the extension rod 4 out of the drill rod 3 and up to the appropriate position. Then, the extension rod 4 and the drill rod 3 are locked and fixedly connected by the second locking assembly 8, and then drilling can be performed at a deeper depth.

[0039] This device features a hollow extension rod 4 and a drill rod 3, with the extraction pipe inserted into both. This prevents friction between the extraction pipe and the borehole wall, extending its service life. The through hole 31 at the bottom of the drill rod 3 facilitates gas extraction operations. The extension rod 4 allows for extending the length of the drill rod 3 and increasing the borehole depth to meet extraction needs at different depths, improving the device's applicability. Furthermore, the first locking assembly 7 and the second locking assembly 8 facilitate quick assembly, disassembly, and locking of the extension rod 4, enhancing ease of use. Before extending the length of the drill rod 3, the extension rod 4 retracts inside the drill rod 3, reducing space occupation and making it easy to carry and use.

[0040] like Figures 1 to 7 As shown, in this embodiment, the first locking assembly 7 includes a locking bolt 71, a locking hole 32 is provided at the top of the drill rod 3, and a threaded hole 41 is provided at the top of the extension rod 4. The locking bolt 71 can pass through the locking hole 32 and be threadedly engaged with the threaded hole 41.

[0041] When in use, the locking bolt 71 is passed through the locking hole 32 and threaded into the threaded hole 41 to lock and fix the extension rod 4 and the drill rod 3. The locking bolt 71 is unscrewed from the threaded hole 41 and removed from the locking hole 32 to release the locking and fixing connection between the extension rod 4 and the drill rod 3. The locking bolt 71 is easy to install or remove quickly, improving the convenience of use.

[0042] like Figures 1 to 7 As shown, in this embodiment, the second locking assembly 8 includes a locking block 81, a connecting plate 82, and an elastic element 83. A limiting hole 42 is provided at the bottom of the extension rod 4. The locking block 81 is slidably disposed in the limiting hole 42, and the locking block 81 can be inserted into the locking hole 32 and cooperate with the locking hole in a limiting manner. The connecting plate 82 is fixedly disposed at the end of the locking block 81 away from the locking hole 32. The elastic element 83 is pre-pressed between the connecting plate 82 and the inner wall of the extension rod 4.

[0043] During use, the locking block 81 slides within the limiting hole 42, and under the elastic force of the elastic element 83, the locking block 81 abuts against the inner wall of the drill rod 3. At this time, the elastic element 83 is stretched, and when the extension rod 4 moves upward, it drives the locking block 81 to move upward. When the locking block 81 moves to the position of the locking hole 32, under the elastic force of the elastic element 83, the connecting plate 82 drives the locking block 81 to insert into the locking hole 32, thus locking and fixing the extension rod 4 and the drill rod 3. The elastic element 83 is a spring. The second locking assembly 8 can quickly and accurately position the connection position between the locking block 81 and the locking hole 32, improving the ease of use.

[0044] like Figures 1 to 7 As shown, in this embodiment, a limiting groove 33 is provided on the inner wall of the drill rod 3, and the locking block 81 is slidably disposed in the limiting groove 33; the cooperation between the locking block 81 and the limiting groove 33 plays a guiding and limiting role for the locking block 81.

[0045] like Figures 1 to 7 As shown, in this embodiment, there are multiple first locking components 7 and multiple second locking components 8, and the multiple first locking components 7 and multiple second locking components 8 are evenly distributed around the extension rod 4.

[0046] Multiple evenly distributed first locking components 7 and second locking components 8 can effectively improve the locking and fixing effect on the extension rod 4 and the drill rod 3.

[0047] like Figure 1 and 2 As shown, in this embodiment, the lifting assembly 5 includes a first motor 51, a screw 52 and a slide rod 53. The screw 52 is rotatably mounted on the mounting frame 1 via a bearing. The first motor 51 drives the screw 52 to rotate. The slide rod 53 is fixedly mounted on the mounting frame 1. The mounting plate 2 is threaded onto the screw 52 and slidably mounted onto the slide rod 53.

[0048] When in use, the first motor 51 is turned on to drive the screw 52 to rotate, and the screw 52 drives the mounting plate 2 to move; the mounting plate 2 and the slide bar 53 work together to guide and limit the mounting plate 2.

[0049] like Figure 1 and 2 As shown, in this embodiment, the rotating assembly 6 includes a second motor 61, a first gear 62, and a second gear 63. The first gear 62 is rotatably mounted on the mounting plate 2 via a bearing. The second motor 61 drives the first gear 62 to rotate via an output shaft. The second gear 63 is fixedly sleeved on the extension rod 4, and the second gear 63 meshes with the first gear 62.

[0050] When in use, the second motor 61 is turned on to drive the first gear 62 to rotate, the first gear 62 drives the second gear 63 to rotate, and the second gear 63 drives the extension rod 4 to rotate.

[0051] Working principle: When the coal mine gas extraction device provided in this application is in use, the extension rod 4 is retracted into the drill rod 3, and the locking bolt 71 is passed through the locking hole 32 and threaded into the threaded hole 41 to lock and fix the extension rod 4 to the drill rod 3. The second motor 61 is turned on to drive the first gear 62 to rotate, the first gear 62 drives the second gear 63 to rotate, the second gear 63 drives the extension rod 4 to rotate, thereby driving the drill rod 3 to rotate. At the same time, the first motor 51 is turned on to drive the screw 52 to rotate, the screw 52 drives the mounting plate 2 to move down, thereby driving the drill rod 3 to move down. During the rotation and downward movement of the drill rod 3, drilling is performed. Then, the external extraction pipe is inserted into the extension rod 4 and the drill rod 3. Then, the external air pump is turned on to carry out gas extraction operation through the extraction pipe.

[0052] When a deeper drilling depth is required, the locking bolt 71 is unscrewed from the threaded hole 41 and moved out of the locking hole 32, thus releasing the locking connection between the extension rod 4 and the drill rod 3. Then, the lifting assembly 5 moves the mounting plate 2 upward, thereby causing the extension rod 4 to extend out of the drill rod 3 and move upward to a suitable position. When the extension rod 4 moves upward, it causes the locking block 81 to move upward. When the locking block 81 moves to the position of the locking hole 32, under the elastic force of the elastic element 83, the connecting plate 82 moves the locking block 81 into the locking hole 32, thus locking the extension rod 4 and the drill rod 3, and then drilling to a deeper depth can be performed.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coal mine gas extraction device, characterized in that: The assembly includes a mounting frame (1), a mounting plate (2), a drill rod (3), an extension rod (4), a lifting assembly (5), and a rotating assembly (6). The lifting assembly (5) is mounted on the mounting frame (1) and is used to drive the mounting plate (2) to move up and down. The extension rod (4) is rotatably mounted on the mounting plate (2) via a bearing. The rotating assembly (6) is mounted on the mounting plate (2) and is used to drive the extension rod (4) to rotate. The drill rod (3) is slidably sleeved on the extension rod (4). A first locking assembly (7) is provided between the top of the extension rod (4) and the drill rod (3), and a second locking assembly (8) is provided between the bottom of the extension rod (4) and the drill rod (3). The interior of the drill rod (3) and the interior of the extension rod (4) are both hollow, and a through hole (31) is provided at the bottom of the drill rod (3). The first locking assembly (7) includes a locking bolt (71), a locking hole (32) is provided at the top of the drill rod (3), and a threaded hole (41) is provided at the top of the extension rod (4). The locking bolt (71) can pass through the locking hole (32) and be threadedly engaged with the threaded hole (41). The second locking assembly (8) includes a locking block (81), a connecting plate (82), and an elastic element (83). The bottom of the extension rod (4) has a limiting hole (42). The locking block (81) is slidably disposed in the limiting hole (42), and the locking block (81) can be inserted into the locking hole (32) and cooperate with the locking hole (32). The connecting plate (82) is fixedly disposed at the end of the locking block (81) away from the locking hole (32). The elastic element (83) is pre-pressed between the connecting plate (82) and the inner wall of the extension rod (4).

2. The coal mine gas extraction device according to claim 1, characterized in that: The inner wall of the drill rod (3) is provided with a limiting groove (33), and the locking block (81) is slidably disposed in the limiting groove (33).

3. The coal mine gas extraction device according to claim 1, characterized in that: Multiple first locking components (7) and multiple second locking components (8) are provided, and multiple first locking components (7) and multiple second locking components (8) are evenly distributed around the extension rod (4).

4. The coal mine gas extraction device according to claim 1, characterized in that: The lifting assembly (5) includes a first motor (51), a screw (52) and a slide rod (53). The screw (52) is rotatably mounted on the mounting frame (1) via a bearing. The first motor (51) drives the screw (52) to rotate. The slide rod (53) is fixedly mounted on the mounting frame (1). The mounting plate (2) is threaded onto the screw (52) and slidably mounted on the slide rod (53).

5. The coal mine gas extraction device according to claim 1, characterized in that: The rotating assembly (6) includes a second motor (61), a first gear (62) and a second gear (63). The first gear (62) is rotatably mounted on the mounting plate (2) via a bearing. The second motor (61) drives the first gear (62) to rotate via an output shaft. The second gear (63) is fixedly sleeved on the extension rod (4) and meshes with the first gear (62).

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