Fixed-point hole sealing device for coal mine drilling

Abstract

The invention discloses a fixed-point hole sealing device for coal mine drilling, and relates to the technical field of coal mine drilling plugging. The positioning and locking device is fixed on the fixed shaft; the adjusting assembly is rotationally arranged in the middle of the fixing shaft; the driving assembly is rotationally arranged at one end of the positioning and locking device and connected with the adjusting assembly; the hole sealing device is fixed to the positioning and locking device and rotationally connected with the adjusting assembly; and the pushing shaft is controllably connected with the fixed shaft. The fixed-point hole sealing device can adapt to hole diameter changes in a self-adaptive mode, has the active built-in sealing capacity and is convenient and fast to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine drilling plugging, and more particularly to a fixed-point plugging device for coal mine drilling. Background Art

[0002] In the field of coal mine borehole sealing, traditional sealing devices generally have problems such as poor adaptability, low sealing reliability and complex operation. Due to the large differences in coal mine borehole diameters and the development of coal seam fissures, conventional sealing devices are difficult to dynamically match aperture changes, and are prone to medium leakage (such as gas leakage or seepage) due to loose sealing surfaces. At the same time, existing technologies mostly rely on rigid support structures, lack the ability to actively embed cracks in the inner wall of the borehole, and the sealing structure needs to be destroyed when the device is recovered, resulting in material waste and low operating efficiency. In addition, the traditional sealing process requires multi-step coordinated operation and high construction precision requirements, which further limits the stability of the sealing effect. There is an urgent need for a fixed-point sealing device that can adapt to aperture changes, has active embedding sealing capabilities and is easy to operate, so as to solve the technical problems of poor dynamic adaptability, insufficient sealing reliability and high operating costs in coal mine borehole sealing. Therefore, it is necessary to provide a fixed-point sealing device for coal mine drilling to solve the problems raised in the above-mentioned background technology. Summary of the Invention

[0003] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fixed-point sealing device for coal mine drilling, comprising:

[0004] Fixed axis;

[0005] A positioning locking device, fixed on the fixed shaft;

[0006] An adjusting assembly is rotatably arranged in the middle of the fixed shaft;

[0007] A driving assembly is rotatably disposed at one end of the positioning locking device and is connected to the adjusting assembly;

[0008] The sealing device is fixed on the positioning locking device and is rotatably connected to the adjustment component;

[0009] The pushing shaft is controllably connected to the fixed shaft.

[0010] Furthermore, preferably, the positioning locking device consists of a first positioning locking component and a second positioning locking component symmetrically distributed about the middle of the fixed shaft, and the first positioning locking component and the second positioning locking component are respectively fixed at both ends of the fixed shaft and have the same structure.

[0011] Furthermore, preferably, the first positioning locking assembly includes:

[0012] A limiting sleeve is sleeved on the end of the fixed shaft, and a plurality of annularly distributed sliding grooves are provided in the limiting sleeve;

[0013] A connecting piece, connecting the fixed shaft and the limiting sleeve, wherein the connecting piece and the sliding groove are staggered;

[0014] The movable locking mechanism is provided with a plurality of ring-shaped distributions and is slidably connected with the sliding groove in the limiting shaft sleeve.

[0015] Furthermore, preferably, the movable locking mechanism includes:

[0016] The adjusting member is slidably arranged in the limiting sleeve and is composed of an outer semi-cylinder and an inner rack;

[0017] The positioning wedge is fixed on the adjusting member, and a vertical surface on one side is slidably connected to the end of the sealing device.

[0018] Furthermore, preferably, the adjustment component includes:

[0019] A rotating sleeve shaft is rotatably arranged in the middle of the fixed shaft;

[0020] Two threaded shafts are symmetrically distributed about the rotating sleeve shaft and fixed at both ends of the rotating sleeve shaft. The threads of the threaded shafts at both ends are opposite and are respectively connected to the corresponding movable locking mechanisms;

[0021] The rotating gear is fixedly connected to the threaded shaft near the drive assembly.

[0022] Furthermore, preferably, the driving assembly includes:

[0023] A drive shaft is rotatably disposed within the second positioning and locking assembly, with one outer end connected to the external control shaft;

[0024] The driving gear is fixedly connected to the driving shaft and meshes with the rotating gear.

[0025] Furthermore, preferably, the sealing device includes:

[0026] The limiting annular surface is symmetrically distributed with two, is rotatably connected to the rotating sleeve shaft, and is slidably arranged on the rotating sleeve shaft, and the outer side is slidably connected to the corresponding movable locking mechanism;

[0027] There are multiple regulating springs distributed in an annular pattern, with both ends respectively clamped on the inner side of the limiting ring surface;

[0028] The rubber ring surface is sleeved on the outside of the adjusting spring, with both ends fixedly connected to the limiting ring surface, and a protrusion array is provided on the outer surface of the rubber ring surface.

[0029] Furthermore, preferably, the fixed shaft and the driving shaft are both provided with a connecting groove at one end close to the outside of the borehole, the fixed shaft is controllably connected to the pushing shaft through the connecting groove, and the driving shaft is controllably connected to the external control shaft through the connecting groove.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] In the present invention, the symmetrical dual-component design of the positioning and locking device realizes bidirectional active clamping of the inner wall of the drill hole, ensuring accurate positioning of the sealing device;

[0032] Through the gear-thread linkage mechanism of the adjustment component and the drive component, the mobile locking mechanism is synchronized with the centripetal movement, which drives the sealing device to expand radially and adapt to different apertures;

[0033] The combined structure of the rubber ring and honeycomb-shaped micro-protrusions in the sealing device utilizes the extrusion stress concentration effect to allow the rubber to penetrate into the micro-cracks of the coal seam, forming an embedded seal, significantly improving the sealing contact area and anti-leakage capability.

[0034] The forward and reverse rotation control of the drive assembly enables the rapid deployment and recovery of the sealing device, simplifying the operation process and reducing the workload.

[0035] The wedge-shaped engagement design between the positioning wedge and the inner wall of the drill hole effectively resists the internal medium pressure and enhances the sealing stability;

[0036] The modular connection groove design enables quick assembly and disassembly of the push shaft and the drive shaft, thereby improving the turnover efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of a fixed-point sealing device for coal mine drilling;

[0038] Figure 2 It is a schematic diagram of the structure of the positioning locking device and the adjusting device;

[0039] Figure 3 This is a schematic diagram of the positioning and locking component structure;

[0040] Figure 4 It is a structural diagram of the mobile locking mechanism;

[0041] Figure 5 This is a schematic diagram of the drive component structure;

[0042] Figure 6 Schematic diagram of the sealing device structure;

[0043] Figure 7 It is a schematic diagram of the connection between the limiting annular surface and the movable locking mechanism;

[0044] Figure 8 Schematic diagram of the connection slot;

[0045] In the figure: 1. Fixed shaft; 2. Positioning locking device; 3. Adjusting assembly; 4. Driving assembly; 5. Sealing device; 6. Pushing shaft; 7. Connecting groove; 21. First positioning locking assembly; 22. Second positioning locking assembly; 31. Rotating sleeve; 32. Threaded shaft; 33. Rotating gear; 41. Driving shaft; 42. Driving gear; 51. Limiting annular surface; 52. Adjusting spring; 53. Rubber ring surface; 54. Protrusion array; 211. Limiting sleeve; 212. Connecting piece; 213. Moving locking mechanism; 2131. Adjusting piece; 2132. Positioning wedge. DETAILED DESCRIPTION

[0046] See also Figures 1 to 8 In an embodiment of the present invention, a fixed-point sealing device for coal mine drilling includes:

[0047] Fixed axis 1;

[0048] A positioning locking device 2 is fixed on the fixed shaft 1;

[0049] An adjusting assembly 3 is rotatably arranged in the middle of the fixed shaft 1;

[0050] The driving assembly 4 is rotatably arranged at one end of the positioning locking device 2 and connected to the adjusting assembly 3;

[0051] The sealing device 5 is fixed on the positioning locking device 2 and is rotatably connected to the adjustment component 3;

[0052] The pushing shaft 6 is controllably connected to the fixed shaft 1 .

[0053] In this embodiment, the positioning locking device 2 is composed of a first positioning locking component 21 and a second positioning locking component 22 symmetrically distributed about the middle of the fixed shaft 1. The first positioning locking component 21 and the second positioning locking component 22 are respectively fixed at both ends of the fixed shaft 1 and have the same structure.

[0054] That is to say, under the action of the first positioning locking component 21 and the second positioning locking component 22, the blocking position in the borehole is determined, and the fixed-point sealing device is placed as a whole at the blocking position through the pushing shaft 6, so that the blocking position is between the positioning locking components, and then the driving component 4 controls the adjustment component 3 to operate, and controls the first positioning locking component 21 and the second positioning locking component 22 to move toward the middle, so as to squeeze and prop up the sealing device 5. Under the squeezing action and the reverse force of the inner wall of the borehole, the sealing device 5 is completely fitted with the borehole to block the borehole, and the sealing device 5 is dynamically adjustable to adapt to boreholes of different diameters.

[0055] In this embodiment, the first positioning and locking component 21 includes:

[0056] A limiting sleeve 211 is sleeved on the end of the fixed shaft 1, and a plurality of annularly distributed sliding grooves are provided in the limiting sleeve 211;

[0057] A connecting member 212 connects the fixed shaft 1 and the limiting sleeve 211, and the connecting member 212 is staggered with the sliding groove;

[0058] The movable locking mechanisms 213 are provided in a plurality in an annular distribution and are slidably connected to the sliding groove in the limiting shaft sleeve 211 .

[0059] That is to say, driven by the driving component 4, the adjusting component 3 rotates. At this time, the limiting sleeve 211 is restricted by the connecting piece 212 and is fixedly connected to the fixed shaft 1 to maintain a fixed state, thereby driving the movable locking mechanism 213 in the first positioning locking component 21 and the second positioning locking component 22 to move toward the center on the slide groove in the limiting sleeve 211, thereby squeezing and supporting the sealing device 5, so that the sealing device 5 fits against the inner wall of the drill hole, and seals and fixes the target point of the drill hole.

[0060] In this embodiment, the movable locking mechanism 213 includes:

[0061] The adjusting member 2131 is slidably disposed in the limiting sleeve 211 and is composed of an outer semi-cylinder and an inner rack;

[0062] The positioning wedge 2132 is fixed on the adjusting member 2131 , and one vertical surface thereof is slidably connected to the end of the sealing device 5 .

[0063] That is to say, under the rotation of the adjusting component 3, the inner rack of the adjusting member 2131 is driven by the adjusting component 3 and moves along the slide groove in the limiting shaft sleeve 211 toward the sealing device 5, pushing the sealing device 5 to move on the adjusting component 3 to seal the drilled hole. It should be noted that the movable locking mechanism 213 is arranged at an angle, with the opening side facing the sealing device 5. When the movable locking mechanism 213 moves toward the sealing device 5 and squeezes the sealing device 5, the adjusting member 2131 drives the positioning wedge 2132 to move. While pushing the sealing device 5, the positioning wedge 2132 slides on the sealing device 5 until the top angle of the positioning wedge 2132 is in contact with the inner wall of the drilled hole. The sealing device 5 is fixed in position by multiple positioning wedges 2132 to prevent the internal pressure of the drilled hole from causing deviation in the position of the sealing device 5 and affecting the sealing stability.

[0064] In this embodiment, the adjustment component 3 includes:

[0065] The rotating sleeve shaft 31 is rotatably arranged in the middle of the fixed shaft 1;

[0066] Two threaded shafts 32 are symmetrically distributed about the rotating sleeve 31 and fixed at both ends of the rotating sleeve 31. The threads of the threaded shafts 32 at both ends are opposite and are respectively connected to the corresponding movable locking mechanisms 213.

[0067] The rotating gear 33 is fixedly connected to the threaded shaft 32 close to the driving assembly 4 .

[0068] That is to say, the driving component 4 drives the rotating sleeve 31 to rotate forward by rotating the gear 33, and then drives the adjusting piece 2131 in the first positioning locking component 21 and the second positioning locking component 22 to move toward the center under the action of the threaded shaft 32, and squeezes and supports the sealing device 5 through the positioning wedge 2132 to seal the drill hole. Similarly, the driving component 4 can drive the rotating sleeve 31 to rotate in the opposite direction by rotating the gear 33, and drives the adjusting piece 2131 in the first positioning locking component 21 and the second positioning locking component 22 to move toward both ends through the threaded shaft 32, so that the sealing device 5 is separated from the inner wall of the drill hole, so that the fixed-point sealing device can be removed as a whole.

[0069] In this embodiment, the driving component 4 includes:

[0070] A drive shaft 41 is rotatably disposed within the second positioning and locking assembly 22, with one outer end connected to the external control shaft;

[0071] The driving gear 42 is fixedly connected to the driving shaft 41 and meshes with the rotating gear 33 .

[0072] That is to say, under the action of the external control shaft, the driving gear 42 is driven to rotate through the driving shaft 41, and then the driving gear 42 drives the rotating sleeve shaft 31 and the threaded shafts 32 at both ends to rotate through the rotating gear 33, thereby adjusting the movable locking mechanism 213 in the positioning locking device 2, and then squeezing the sealing device 5 to seal the drilled hole.

[0073] In this embodiment, the sealing device 5 includes:

[0074] The limiting annular surfaces 51 are symmetrically provided with two, are rotatably connected to the rotating sleeve shaft 31, and are slidably arranged on the rotating sleeve shaft 31, and the outer sides are slidably connected to the corresponding movable locking mechanism 213;

[0075] There are multiple adjusting springs 52 distributed in an annular pattern, with both ends respectively clamped on the inner side of the limiting annular surface 51;

[0076] The rubber ring surface 53 is sleeved on the outside of the adjustment spring 52 , with both ends fixedly connected to the limiting ring surface 51 , and a protrusion array 54 is provided on the outer surface of the rubber ring surface 53 .

[0077] That is to say, when the rotating sleeve 31 drives the threaded shafts 32 at both ends to rotate forward, the movable locking mechanism 213 in the positioning locking assembly at both ends moves toward the middle, pushing the limiting ring surface 51 to move toward the middle on the rotating sleeve 31, squeezing the adjusting spring 52, supporting the rubber ring surface 53, and the positioning wedge 2132 slides on the limiting ring surface 51. After the rubber ring surface 53 fits the inner wall of the drill hole, the movable locking mechanism 213 continues to push the limiting ring surface 51 until the movable locking mechanism The positioning wedge 2132 on 213 fits against the inner wall of the borehole to fix the entire device. At this time, under the reverse force continuously applied by the inner wall of the borehole, the rubber ring surface 53 fits tightly against the inner wall of the borehole, and the protrusion array 54 on the rubber ring surface 53 generates local stress concentration during the extrusion process, causing the rubber layer to penetrate into the micro-cracks of the coal seam to form an embedded seal, effectively increasing the sealing contact area and improving the sealing reliability. The protrusion array 54 is a honeycomb-shaped micro-protrusion (diameter 2mm, height 1mm).

[0078] In this embodiment, the fixed shaft 1 and the driving shaft 41 are both provided with a connecting groove 7 at one end close to the outside of the drill hole. The fixed shaft 1 is controllably connected to the pushing shaft 6 through the connecting groove 7, and the driving shaft 41 is controllably connected to the external control shaft through the connecting groove 7.

[0079] That is to say, under the action of the connecting groove 7, the pushing shaft 6 is fixedly connected to the fixed shaft 1, and the fixed-point sealing device is placed at the specified position in the drill hole through the pushing shaft 6, and the position of the positioning locking device 2 is fixed. Similarly, under the action of the connecting groove 7, the external control shaft is fixedly connected to the driving shaft 41, and the driving component 4 is driven by the control shaft to rotate, thereby controlling the adjusting component 3. Under the action of the positioning locking device 2, the sealing device 5 is used to complete the sealing of the drill hole. After the drill hole is sealed, the control shaft and the pushing shaft 6 can be disengaged and withdrawn, and the connecting groove 7 and the control shaft and the pushing shaft 6 can be connected by electromagnetic connection or bayonet block.

[0080] During the specific implementation, first, the pushing shaft 6 is fixedly connected to the fixed shaft 1 through the connecting groove 7, and the external control shaft is fixedly connected to the driving shaft 41. The fixed-point sealing device is placed as a whole at the target position inside the drill hole through the pushing shaft 6, so that the pushing shaft 6, the fixed shaft 1 and the positioning locking device 2 are kept in a fixed position. Then the control shaft rotates, the driving shaft 41 and the driving gear 42 rotate synchronously, and then the adjusting component 3 is driven to rotate forward as a whole through the rotating gear 33, that is, the rotating sleeve shaft 31 rotates in the limiting annular surface 51, and the threaded shafts 32 at both ends rotate at the same time, and then the threaded shafts 32 pass through the adjusting member. The rack on the inside of 2131 drives the movable locking mechanism 213 in the positioning locking assembly at both ends to move toward the middle, and the positioning wedge 2132 pushes the limiting ring surface 51 to move toward the middle on the rotating sleeve shaft 31, squeezing the adjusting spring 52, supporting the rubber ring surface 53, and the positioning wedge 2132 slides on the limiting ring surface 51. After the rubber ring surface 53 fits the inner wall of the drill hole, the movable locking mechanism 213 continues to push the limiting ring surface 51 until the positioning wedge 2132 on the movable locking mechanism 213 fits the inner wall of the drill hole, thereby fixing the entire device. At this time, under the reverse force continuously applied by the inner wall of the borehole, the rubber ring surface 53 is tightly fitted with the inner wall of the borehole, and the convex array 54 on the rubber ring surface 53 generates local stress concentration during the extrusion process, so that the rubber layer penetrates into the micro cracks of the coal seam to form an embedded seal, effectively increasing the sealing contact area and improving the sealing reliability. After completing the sealing of the borehole, the control shaft and the pushing shaft 6 can be disengaged and withdrawn. When it is necessary to recycle the fixed-point sealing device, the control shaft can be rotated, and the drive shaft 41 and the drive gear 42 can be rotated synchronously, and then the adjusting component 3 can be driven by the rotating gear 33. The body is reversed, that is, the rotating sleeve shaft 31 rotates in the limiting ring surface 51, and the threaded shafts 32 at both ends rotate at the same time. Then the threaded shaft 32 drives the movable locking mechanism 213 in the positioning locking assembly at both ends to move toward both ends on the slide groove in the limiting shaft sleeve 211 through the rack inside the adjusting member 2131, and the positioning wedge block 2132 gradually separates from the inner wall of the drill hole. Under the action of the adjusting spring 52, the limiting ring surfaces 51 at both ends are pushed to follow the positioning wedge block 2132 to reset, so that the rubber ring surface 53 is separated from the inner wall of the drill hole, and then the fixed-point sealing device can be taken out of the drill hole as a whole through the pushing shaft 6.

[0081] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A fixed-point sealing device for coal mine drilling, characterized by: include: Fixed axis (1); A positioning locking device (2) fixed on the fixed shaft (1); An adjusting component (3) is rotatably arranged in the middle of the fixed shaft (1); A driving assembly (4) is rotatably mounted on one end of the positioning locking device (2) and is connected to the adjusting assembly (3); A sealing device (5) is fixed to the positioning locking device (2) and is rotationally connected to the adjustment component (3); The pushing shaft (6) is controllably connected to the fixed shaft (1).

2. A fixed-point sealing device for coal mine drilling according to claim 1, characterized in that: The positioning locking device (2) is composed of a first positioning locking component (21) and a second positioning locking component (22) symmetrically distributed about the middle of the fixed shaft (1); the first positioning locking component (21) and the second positioning locking component (22) are respectively fixed to the two ends of the fixed shaft (1) and have the same structure.

3. A fixed-point sealing device for coal mine drilling according to claim 2, characterized in that: The first positioning locking component (21) comprises: A limiting shaft sleeve (211) is sleeved on the end of the fixed shaft (1), and a plurality of annularly distributed sliding grooves are provided in the limiting shaft sleeve (211); A connecting member (212) connects the fixed shaft (1) and the limiting shaft sleeve (211), and the connecting member (212) is staggered with the sliding groove; A plurality of movable locking mechanisms (213) are provided in an annular distribution and are slidably connected to the sliding groove in the limiting shaft sleeve (211).

4. A fixed-point sealing device for coal mine drilling according to claim 3, characterized in that: The mobile locking mechanism (213) comprises: An adjusting member (2131) is slidably disposed in the limiting sleeve (211) and is composed of an outer semi-cylinder and an inner rack; The positioning wedge (2132) is fixed on the adjusting member (2131), and a vertical surface on one side is slidably connected to the end of the sealing device (5).

5. A fixed-point sealing device for coal mine drilling according to claim 3, characterized in that: The regulating component (3) comprises: A rotating sleeve shaft (31) is rotatably arranged in the middle of the fixed shaft (1); Two threaded shafts (32) are symmetrically distributed about the rotating sleeve shaft (31) and fixed at both ends of the rotating sleeve shaft (31). The threads of the threaded shafts (32) at both ends are opposite and are respectively connected to corresponding movable locking mechanisms (213); The rotating gear (33) is fixedly connected to the threaded shaft (32) near the driving assembly (4).

6. A fixed-point sealing device for coal mine drilling according to claim 5, characterized in that: The driving assembly (4) comprises: A drive shaft (41) is rotatably disposed within the second positioning locking assembly (22), with one outer end connected to an external control shaft; The driving gear (42) is fixedly connected to the driving shaft (41) and meshes with the rotating gear (33).

7. A fixed-point sealing device for coal mine drilling according to claim 5, characterized in that: The sealing device (5) comprises: Two limiting annular surfaces (51) are symmetrically distributed and are rotatably connected to the rotating sleeve shaft (31), and are slidably arranged on the rotating sleeve shaft (31), and the outer sides are slidably connected to the corresponding movable locking mechanism (213); A plurality of regulating springs (52) are provided in an annular distribution, with both ends respectively clamped on the inner side of the limiting annular surface (51); The rubber ring surface (53) is sleeved on the outside of the regulating spring (52), and its two ends are fixedly connected to the limiting ring surface (51). A protrusion array (54) is provided on the outer surface of the rubber ring surface (53).

8. The fixed-point sealing device for coal mine drilling according to claim 6, characterized in that: The fixed shaft (1) and the driving shaft (41) are both provided with a connecting groove (7) at one end close to the outside of the drill hole. The fixed shaft (1) is controllably connected to the pushing shaft (6) via the connecting groove (7), and the driving shaft (41) is controllably connected to the external control shaft via the connecting groove (7).

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