Coal mine underground drilling fixed-point hole sealing device

Abstract

The invention relates to the technical field of coal mine drill hole plugging equipment, in particular to a coal mine underground drill hole fixed-point hole sealing device. According to the technical scheme, the grouting hole packer comprises a grouting hole packer inserted into a drill hole, a threaded rod is arranged at one end of the grouting hole packer, a spiral sleeve is spirally connected to the threaded rod, and the grouting hole packer further comprises a pair of handle sleeves fixedly connected to the outer wall of the spiral sleeve. Through the structural design of the locking mechanism, the reset mechanism, the labor-saving mechanism and the like, when the grouting hole packer is used, the grouting hole packer is firstly inserted into a drill hole, a handle is rotated to drive a connecting rod to enable a rotating sleeve to rotate, an abutting head is clamped into an arc-shaped groove to push a tight supporting plate to abut against the hole wall, the grouting hole packer is fixed into the drill hole, manual supporting is not needed, and physical output is reduced. And after the capsule expands, the handle telescopic rod is screwed out of the thread groove through the thread by rotating the rotary button, the first spring pushes the handle telescopic rod to extend, the power arm is enlarged, the spiral sleeve is rotated in a labor-saving manner, and then the hole sealing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mine borehole sealing equipment technology, and in particular to a fixed-point sealing device for underground coal mine boreholes. Background Technology

[0002] In underground coal mines, gas extraction is one of the core functions of boreholes. By drilling extraction boreholes in the coal seam, negative pressure is used to extract gas and transport it to the surface or a designated area, effectively reducing the gas content and pressure in the coal seam and preventing gas outbursts and explosions. In underground borehole sealing devices, the grouting sealer is an indispensable key component. The manual grouting sealer mainly operates based on the principle of mechanical transmission: by turning the handle, the spiral sleeve is driven, and through the threaded transmission, the spiral rod moves axially, pushing the capsule to deform and expand outwards, tightly fitting against the borehole wall to achieve an initial seal; subsequently, grout is injected through the grouting channel to fill the borehole gaps, further improving the sealing effect and preventing gas leakage and water seepage.

[0003] However, existing manual grouting sealing devices, when inserted into the borehole, do not have an inflated end capsule, resulting in a lack of fixed connection between the sealing device and the borehole wall. This makes them prone to wobbling, tilting, or falling due to their own weight, requiring manual support to ensure accurate positioning. However, during prolonged deep-hole operations, manual support significantly increases the operator's physical exertion, leading to fatigue. Furthermore, the fixed-length handle, after the capsule expands and friction with the borehole wall increases, struggles to provide sufficient leverage, making manual rotation increasingly difficult and impacting sealing efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a fixed-point sealing device for underground drilling in coal mines.

[0005] The technical solution of the present invention: a fixed-point sealing device for underground coal mine boreholes, comprising a grouting sealing device inserted into the borehole, one end of the grouting sealing device being provided with a threaded rod, and a spiral sleeve being spirally connected to the threaded rod; further comprising: a pair of gloves fixedly connected to the outer wall of the spiral sleeve, the inner end of the gloves away from the spiral sleeve being provided with an elongation and shortening force-saving mechanism; a pair of locking mechanisms installed on the outer wall of the grouting sealing device near the spiral sleeve end, which abuts against the inner wall of the borehole after rotation; and a reset mechanism disposed within the locking mechanisms to restore it to its original position.

[0006] Optionally, the locking mechanism includes a tensioning plate, a U-shaped seat, and a rotating sleeve. The rotating sleeve is rotatably connected to a rotating shaft that engages with the U-shaped seat. The U-shaped seat has a pair of elliptical grooves inside. The two ends of the rotating shaft are fixedly connected to rotating blocks that engage with the elliptical grooves. The top of the tensioning plate is fixedly connected to a protrusion that engages with the rotating shaft. The U-shaped seat also has an arc-shaped groove inside. The outer wall of the rotating sleeve has a butt that engages with the arc-shaped groove and drives the tensioning plate to move away from the grouting sealing device.

[0007] Optionally, a connecting rod is also fixedly connected to the outer wall of the rotating sleeve, and a handle is fixedly connected to the end of the connecting rod away from the rotating sleeve.

[0008] Optionally, the end of the tensioning plate near the rotating sleeve is provided with a groove for the abutment to be engaged.

[0009] Optionally, the outer wall of the support plate is fixedly connected with multiple anti-slip strips, and the end of the support plate away from the protrusion is also provided with an inclined surface.

[0010] Optionally, the reset mechanism includes a second spring fixedly connected inside the elliptical groove, and a stop plate is fixedly connected to the end of the second spring away from the inner wall of the elliptical groove. The stop plate has a slot that tightly holds the rotating block.

[0011] Optionally, the labor-saving mechanism includes a handle telescopic rod slidably connected to the end of the glove away from the grouting sealing device. The end of the handle telescopic rod inserted into the glove is provided with a connecting sleeve. A first spring is fixedly connected inside the glove. The end of the first spring away from the inner wall of the glove is fixedly connected to the connecting sleeve. The end of the grouting sealing device away from the threaded rod is provided with a capsule.

[0012] Optionally, the end of the glove away from the spiral sleeve has a threaded groove, and the end of the handle extension rod away from the glove has a thread that is spirally connected to the threaded groove.

[0013] Optionally, a knob is fixedly connected to one end of the handle telescopic rod near the thread, and the knob has multiple anti-slip grooves arranged in a circumferential array.

[0014] Optionally, a rotating rod is fixedly connected to one end of the handle telescopic rod near the connecting sleeve, and a locking head is movably connected inside the connecting sleeve. The end of the rotating rod away from the handle telescopic rod moves through the connecting sleeve and is fixedly connected to the locking head.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This invention employs a locking mechanism, a reset mechanism, and a labor-saving mechanism. In use, the grouting sealer is first inserted into the drill hole. Turning the handle rotates the connecting rod, causing the rotating sleeve to rotate. The butt engages with the arc-shaped groove, pushing the support plate against the hole wall and fixing the grouting sealer inside the drill hole. No manual support is required, reducing physical exertion. Once the capsule expands, simply turning the knob causes the handle extension rod to unscrew through the threaded groove. The first spring extends the extension rod, increasing the power arm and allowing for easier rotation of the spiral sleeve, thereby improving sealing efficiency. Attached Figure Description

[0017] Figure 1 A schematic diagram of a fixed-point sealing device for underground drilling in coal mines according to the present invention is provided.

[0018] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0019] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0020] Figure 4 for Figure 3 A schematic diagram of the split structure;

[0021] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure connecting the glove and the handle extension rod;

[0022] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of the connecting sleeve, clamp, and rotating rod.

[0023] Reference numerals: 1. Grouting sealing device; 11. Capsule; 12. Threaded rod; 13. Spiral sleeve; 14. Handle glove; 15. Handle telescopic rod; 151. Connecting sleeve; 152. Clamp; 153. Rotating rod; 16. First spring; 17. Threaded groove; 18. Knob; 19. Thread; 2. Tensioning plate; 21. Protrusion; 22. Rotating groove; 23. Anti-slip strip; 24. Inclined surface; 3. U-shaped seat; 31. Elliptical groove; 32. Second spring; 33. Abutment plate; 34. Arc groove; 4. Rotating sleeve; 41. Rotating shaft; 42. Rotating block; 43. Connecting rod; 44. Handle; 45. Abutment. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0026] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, 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. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0030] Example

[0031] like Figures 1 to 6As shown, the present invention proposes a fixed-point sealing device for underground coal mine boreholes, comprising a grouting sealing device 1 inserted into the borehole. One end of the grouting sealing device 1 is provided with a threaded rod 12, which is screwed onto a spiral sleeve 13 to transmit rotational motion. The spiral sleeve 13 is screwed onto the threaded rod 12 and moves axially along the threaded rod 12 during rotation, driving other components. A pair of handle sleeves 14 are fixedly connected to the outer wall of the spiral sleeve 13. The handle sleeves 14 are used to install a handle telescopic rod 15, providing a force application point.

[0032] Among them, Figures 2 to 4 As shown, a pair of locking mechanisms are installed on the outer wall of the grouting sealing device 1 near the spiral sleeve 13. The locking mechanism includes a tensioning plate 2, a U-shaped seat 3, and a rotating sleeve 4. The tensioning plate 2 is installed on the outer wall of the grouting sealing device 1 near the spiral sleeve 13. After rotation, it abuts against the inner wall of the borehole to fix the device. The U-shaped seat 3 and the rotating sleeve 4 are also shown. The tensioning plate 2 near the rotating sleeve 4 has a groove 22 for the abutment 45 to be inserted into. The groove 22 provides a mounting base for the components of the rotating sleeve 4. The middle of the rotating sleeve 4 is rotatably connected to a rotating shaft 41 that is inserted into the U-shaped seat 3. The U-shaped seat 3 has a pair of elliptical grooves 31 inside. The elliptical grooves 31 are opened inside the U-shaped seat 3 for the rotating block 42 to be inserted into, restricting the movement trajectory of the rotating shaft 41. Both ends of the rotating shaft 41 are fixedly connected to rotating blocks 42 that fit into elliptical grooves 31. The top of the support plate 2 is fixedly connected to a protrusion 21 that movably engages with the rotating shaft 41. An arc-shaped groove 34 is also provided inside the U-shaped seat 3 for the abutment 45 to engage and guide the movement direction of the support plate 2. The outer wall of the rotating sleeve 4 is provided with an abutment 45 that, after engaging the arc-shaped groove 34, drives the support plate 2 to move away from the grouting sealing device 1. The abutment 45 is located on the outer wall of the rotating sleeve 4 and, after engaging the arc-shaped groove 34, drives the support plate 2 to move away from the grouting sealing device 1.

[0033] Secondly, such as Figures 2 to 4As shown, a connecting rod 43 is fixedly connected to the outer wall of the rotating sleeve 4. The connecting rod 43 is fixed to the outer wall of the rotating sleeve 4, and the end away from the rotating sleeve 4 is connected to a handle 44 to transmit rotational power. The handle 44 is fixedly connected to the end of the connecting rod 43 away from the rotating sleeve 4, making it convenient for the operator to rotate the rotating sleeve 4. The main function of the handle 44 is to provide the operator with a force point. By rotating, the locking mechanism is activated, thus fixing the grouting sealing device 1 in the borehole. When the handle 44 is rotated, the rotating sleeve 4 is rotated around the rotating shaft 41 through the connecting rod 43, causing the abutment 45 to engage with the arc groove 34 of the U-shaped seat 3, pushing the tensioning plate 2 towards the inner wall of the borehole and abutting it, thus achieving the initial fixation of the device and preventing it from shaking or falling off during insertion. The handle 44 is ergonomically designed, making it easy for the operator to apply rotational torque, especially in deep hole operations, which can reduce physical exertion and improve operating efficiency.

[0034] In addition, such as Figures 2 to 4 As shown, several anti-slip strips 23 are fixedly connected to the outer wall of the tensioning plate 2. The anti-slip strips 23 are made of rubber, which has good elasticity and anti-slip properties, and can improve the fixing stability by increasing the friction with the hole wall. The anti-slip strips 23 are fixed to the outer wall of the tensioning plate 2, increasing the friction with the inner wall of the drill hole and improving the fixing stability. An inclined surface 24 is also provided at the end of the tensioning plate 2 away from the protrusion 21. The inclined surface 24 is provided at the end of the tensioning plate 2 away from the protrusion 21, so that the tensioning plate 2 can abut against the inner wall of the drill hole. Under normal conditions, when the handle 44 is not turned, the pair of tensioning plates 2 are in a retracted state. Specifically, the tensioning plate 2 is close to the outer wall of the grouting sealing device 1, and its end away from the protrusion 21 (with the inclined surface 24) does not contact the inner wall of the drill hole. The whole is arranged along the axial direction of the grouting sealing device 1, which facilitates the insertion of the device into the drill hole.

[0035] It is worth noting that, such as Figures 3 to 4 As shown, a pair of locking mechanisms, after rotation, press against the inner wall of the drill hole. The locking mechanisms include a reset mechanism to restore them to their original positions. The reset mechanism includes a second spring 32 fixedly connected inside the elliptical groove 31. The second spring 32, fixed inside the elliptical groove 31, provides a reset force, causing the locking mechanisms to return to their original positions. A stop plate 33 is also fixedly connected to the end of the second spring 32 away from the inner wall of the elliptical groove 31. The stop plate 33, fixed to the end of the second spring 32 away from the inner wall of the elliptical groove 31, locks the rotating block 42, achieving reset. The stop plate 33 has a groove that closely fits and locks the rotating block 42, ensuring greater stability when the stop plate 33 locks the rotating block.

[0036] Furthermore, such as Figure 1 , Figure 5 and Figure 6As shown, the end of the glove 14 furthest from the spiral sleeve 13 has an extension and retraction mechanism inside. This mechanism includes a handle telescopic rod 15 slidably connected to the end of the glove 14 furthest from the grouting sealing device 1. The handle telescopic rod 15 is slidably connected inside the glove 14 and can extend and retract, achieving effortless rotation by increasing the power arm. A connecting sleeve 151 is provided at the end of the handle telescopic rod 15 inserted into the glove 14. The connecting sleeve 151 is located at the end of the handle telescopic rod 15 inserted into the glove 14 and is connected to a first spring 16. The first spring 16 is fixedly connected inside the glove 14. At its maximum elasticity, the first spring 16 prevents the end of the handle telescopic rod 15 from detaching from the glove 14, thus ensuring a stable connection between the handle telescopic rod 15 and the glove 14. The first spring 16, fixed inside the glove 14, pushes the connecting sleeve 151, causing the handle telescopic rod 15 to extend. The first spring 16 is fixedly connected to the connecting sleeve 151 at the end away from the inner wall of the glove 14. The grouting and sealing device 1 is provided with a capsule 11 at the end away from the threaded rod 12. The capsule 11 is located at the end of the grouting and sealing device 1 away from the threaded rod 12. After expansion, it fits against the borehole wall to achieve a seal.

[0037] Furthermore, such as Figure 1 and Figure 5 As shown, the end of the glove 14 furthest from the spiral sleeve 13 has a threaded groove 17 inside. The end of the handle extension rod 15 furthest from the glove 14 has a thread 19 that is spirally connected to the threaded groove 17. A knob 18 is fixedly connected to the end of the handle extension rod 15 near the thread 19. The knob 18 is fixed to the end of the handle extension rod 15 near the thread 19, making it convenient for the operator to rotate the handle extension rod 15. The knob 18 has multiple anti-slip grooves arranged in a circumferential array. The anti-slip grooves are used to increase the friction between the hand and the knob 18, thus achieving an anti-slip effect.

[0038] Furthermore, such as Figures 5 to 6 As shown, a rotating rod 153 is fixedly connected to one end of the handle telescopic rod 15 near the connecting sleeve 151. The rotating rod 153 is fixedly connected to the end of the handle telescopic rod 15 near the connecting sleeve 151, driving the locking head 152 to rotate. The locking head 152 is movably connected inside the connecting sleeve 151, cooperating with the rotating rod 153 to transmit rotational power. The end of the rotating rod 153 away from the handle telescopic rod 15 moves through the connecting sleeve 151 and is fixedly connected to the locking head 152.

[0039] In this embodiment, when using the underground drilling and sealing device in a coal mine, the grouting sealing device 1 is first inserted into the borehole, and then the U-shaped seat 3 is pressed against the borehole. At this time, the tensioning plate 2 will be inserted into the borehole, but the capsule 11 has not yet expanded. Next, the handle 44 is rotated to drive the connecting rod 43 to rotate. The connecting rod 43 will drive the rotating sleeve 4 to rotate around the rotating shaft 41 in the U-shaped seat 3. The rotating sleeve 4 will then drive the abutment 45 to engage with the arc groove 34 in the U-shaped seat 3 for locking. However, due to the structural design of the abutment 45, the rotating sleeve 4 can sequentially drive the rotating shaft 41, the protrusion 21 and the tensioning plate 2 to press tightly against the inner wall of the borehole, thereby achieving initial fixation of the grouting sealing device 1 in the borehole.

[0040] When it is necessary to fix the grouting sealing device 1 inside the borehole by expanding the capsule 11, simply turn the knob 18 to rotate the handle extension rod 15 inside the handle sleeve 14. Since the thread 19 and the thread groove 17 are helically connected, the extension rod 15 will continue to rotate until the thread 19 is disengaged from the thread groove 17. At this time, the handle extension rod 15 can be extended by the elastic thrust of the first spring 16 inside the handle sleeve 14. The operator's point of force application is further away from the rotation center of the spiral sleeve 13. By increasing the power arm, less force is needed to overcome the friction between the capsule and the borehole wall after expansion, achieving easy rotation and saving more physical effort.

[0041] The preferred embodiments of the present invention described above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fixed-point sealing device for underground coal mine boreholes, comprising a grouting sealing device (1) inserted into the borehole, wherein one end of the grouting sealing device (1) is provided with a threaded rod (12), and a spiral sleeve (13) is spirally connected to the threaded rod (12), characterized in that, Also includes: A pair of hand gloves (14) are fixedly connected to the outer wall of the spiral sleeve (13), and the end of the hand gloves (14) away from the spiral sleeve (13) is provided with an extension and retraction mechanism. A pair of locking mechanisms are installed on the outer wall of one end of the grouting sealing device (1) near the spiral sleeve (13) and abut against the inner wall of the borehole after rotation; A reset mechanism is provided within the locking mechanism to restore it to its original position.

2. The fixed-point sealing device for underground drilling in coal mines according to claim 1, characterized in that, The locking mechanism includes a support plate (2), a U-shaped seat (3), and a rotating sleeve (4). The middle part of the rotating sleeve (4) is rotatably connected to a rotating shaft (41) that is inserted into the U-shaped seat (3). The U-shaped seat (3) has a pair of elliptical grooves (31) inside. The two ends of the rotating shaft (41) are fixedly connected to rotating blocks (42) that are inserted into the elliptical grooves (31). The top of the support plate (2) is fixedly connected to a protrusion (21) that is movably sleeved with the rotating shaft (41). The U-shaped seat (3) also has an arc groove (34) inside. The outer wall of the rotating sleeve (4) is provided with a butt (45) that, after being inserted into the arc groove (34), drives the support plate (2) to move away from the grouting sealing device (1).

3. A fixed-point sealing device for underground drilling in coal mines according to claim 2, characterized in that, A connecting rod (43) is also fixedly connected to the outer wall of the rotating sleeve (4), and a handle (44) is fixedly connected to the end of the connecting rod (43) away from the rotating sleeve (4).

4. A coal mine underground borehole sealing device according to claim 2, characterized in that, The end of the tensioning plate (2) near the rotating sleeve (4) is provided with a rotating groove (22) for the abutment (45) to be inserted.

5. A coal mine underground borehole sealing device according to claim 2, characterized in that, The outer wall of the support plate (2) is fixedly connected with a plurality of anti-slip strips (23), and the end of the support plate (2) away from the protrusion (21) is also provided with an inclined surface (24).

6. A coal mine underground borehole sealing device according to claim 2, characterized in that, The reset mechanism includes a second spring (32) fixedly connected inside the elliptical groove (31). The end of the second spring (32) away from the inner wall of the elliptical groove (31) is also fixedly connected to a stop plate (33). The stop plate (33) has a slot that tightly holds the rotating block (42).

7. A fixed-point sealing device for underground drilling in coal mines according to claim 1, characterized in that, The labor-saving mechanism includes a handle telescopic rod (15) slidably connected to the end of the handle glove (14) away from the grouting sealing device (1). The end of the handle telescopic rod (15) inserted into the handle glove (14) is provided with a connecting sleeve (151). A first spring (16) is fixedly connected inside the handle glove (14). The end of the first spring (16) away from the inner wall of the handle glove (14) is fixedly connected to the connecting sleeve (151). The end of the grouting sealing device (1) away from the threaded rod (12) is provided with a capsule (11).

8. A coal mine underground borehole sealing device according to claim 7, characterized in that, The end of the handle glove (14) away from the spiral sleeve (13) has a threaded groove (17) inside, and the end of the handle telescopic rod (15) away from the handle glove (14) has a thread (19) that is spirally connected to the threaded groove (17).

9. A coal mine underground borehole sealing device according to claim 7, characterized in that, The handle telescopic rod (15) is fixedly connected to a knob (18) at one end near the thread (19), and the knob (18) has multiple anti-slip grooves arranged in a circumferential array.

10. A coal mine underground borehole sealing device according to claim 7, characterized in that, The handle telescopic rod (15) is fixedly connected to a rotating rod (153) at one end near the connecting sleeve (151). A locking head (152) is movably connected inside the connecting sleeve (151). The rotating rod (153) moves through the connecting sleeve (151) away from the handle telescopic rod (15) and is fixedly connected to the locking head (152).

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