Acid leakage prevention sealing protection structure for acidification anti-reflection drill hole in coal seam mining

Abstract

The utility model relates to the technical field of sealing protection structures, in particular to an acid leakage prevention sealing protection structure of an acidification anti-reflection drill hole in coal mining. In order to solve the problems that an acid solution injected into a coal seam flows out along a drill hole in the acidification anti-reflection operation of coal seam mining, the solution is wasted, and the acidification anti-reflection effect is reduced, the following technical scheme is provided: the acidification anti-reflection device comprises a blocking plate; the positioning assembly is arranged on the side, close to the coal seam, of the blocking plate and inserted into the drill hole; the sealing mechanism is arranged on the blocking plate and is used for sealing the drilling position; the adjusting assembly is located on the side, away from the positioning assembly, of the blocking plate and used for driving the positioning assembly to be fixed in the drill hole. The acid solution can be effectively prevented from flowing out along the drill hole, solution waste is reduced, the acidification anti-reflection effect is guaranteed, and corrosion damage to the surroundings is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing protection structures, in particular to an acid leakage prevention sealing protection structure for acidizing and permeability enhancing boreholes in coal seam mining. Background Technique

[0002] In coal seam mining operations, in order to improve the gas permeability of coal seams for more efficient gas extraction, the acidizing and permeability enhancing technology is often used. The core principle of this technology is to inject acidic solutions into the coal seam through pre-constructed boreholes. These acidic solutions can react chemically with the minerals contained in the coal seam and the substances that block the pores and fissures of the coal body, and then dissolve them. As the above dissolution process progresses, the originally blocked pores in the coal body are unclogged, and the fracture network is further expanded, which greatly enhances the flow capacity of gas in the coal body and creates favorable conditions for subsequent gas extraction work.

[0003] However, in the actual operation process, some acidic solutions will flow out along the borehole. This outflow of the solution will cause waste of the acidic solution, reduce the effect of acidizing and permeability enhancement, and cannot fully play its due role. In view of this, the utility model proposes an acid leakage prevention sealing protection structure for acidizing and permeability enhancing boreholes in coal seam mining. Content of the Utility Model

[0004] The purpose of the utility model is to propose an acid leakage prevention sealing protection structure for acidizing and permeability enhancing boreholes in coal seam mining in view of the problem in the background technique that in the acidizing and permeability enhancing operation of coal seam mining, the acidic solution injected into the coal seam will flow out along the borehole, causing waste of the solution and reducing the effect of acidizing and permeability enhancement.

[0005] The technical solution of the utility model: An acid leakage prevention sealing protection structure for acidizing and permeability enhancing boreholes in coal seam mining, including a plug plate; a positioning component arranged on the side of the plug plate close to the coal seam, the positioning component being inserted into the borehole; a sealing mechanism installed on the plug plate, the sealing mechanism being used to seal the borehole position; an adjusting component located on the side of the plug plate away from the positioning component, the adjusting component being used to drive the positioning component to be fixed in the borehole.

[0006] Optionally, the positioning component includes a moving rod slidably connected to the plug plate, a positioning ring is fixedly connected to one end of the moving rod away from the plug plate, an installation ring is rotatably connected to the outer ring of the positioning ring, and multiple connecting seats are fixedly connected to the outside of the installation ring, and the multiple connecting seats are distributed in a circular array.

[0007] Optionally, the connecting seat is arranged in a "U" shape, a rotating shaft is fixedly connected in the connecting seat, a support plate is rotatably connected to the rotating shaft, a sliding groove is formed in the support plate, a sliding rod is slidably connected in the sliding groove, and fixing rods are fixedly connected to both ends of the sliding rod, and the multiple fixing rods are all fixedly connected to the plug plate.

[0008] Optionally, multiple sets of support rods are fixedly connected between the multiple sets of fixed rods.

[0009] Optionally, a fixed cylinder is fixedly connected to the side of the blocking plate near the positioning component. The fixed cylinder is sleeved on the outer ring of the moving rod. A rubber sleeve is provided between the moving rod and the fixed cylinder, and the rubber sleeve is fixedly connected to the inner side of the fixed cylinder.

[0010] Optionally, the sealing mechanism includes a fixing ring fixedly connected to the side of the plug plate near the coal seam, an airbag installed on the side of the fixing ring away from the plug plate, a first one-way valve connected to the airbag, the first one-way valve installed in the plug plate, a connecting pipe connected to the end of the first one-way valve away from the airbag, an inflatable ball connected to the end of the connecting pipe away from the first one-way valve, and a second one-way valve installed on the end of the inflatable ball away from the connecting pipe.

[0011] Optionally, the airbag is connected to an exhaust pipe, the end of the exhaust pipe away from the airbag passes through a blocking plate and is threaded with a sealing cap, a support ring is fixedly connected to the outer ring of the exhaust pipe, a rubber pad is installed on the side of the sealing cap near the support ring, and an exhaust hole is opened on the side of the support ring away from the blocking plate, through which the exhaust pipe passes.

[0012] Optionally, the adjustment assembly includes a threaded rod fixedly connected to the end of the moving rod away from the coal seam, a threaded sleeve threadedly connected to the threaded rod, a fixing frame installed on the side of the threaded sleeve, the fixing frame being fixedly connected to the blocking plate, and a knob fixedly connected to the end of the threaded rod away from the moving rod.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] This invention uses the synchronous compression of multiple sets of support plates in the positioning assembly to firmly fix the plug plate on the outside of the borehole, providing a solid foundation for sealing. At the same time, the airbag in the sealing mechanism, after being inflated, fits tightly against the inner wall of the borehole, which, together with the initial sealing of the fixing cylinder and the rubber sleeve, forms multiple sealing defenses. This effectively prevents acidic solutions from flowing out along the borehole, reduces solution waste, ensures the full utilization of the acidification and permeation enhancement effect, and avoids corrosion and damage to surrounding equipment, structures, and the environment caused by acidic solutions.

[0015] Furthermore, through the cooperation of knobs, threaded rods, and threaded sleeves, the deflection degree of the support plate in the positioning component can be precisely controlled to adapt to the drilling and fixing requirements of different hole diameters; the setting of the inflatable ball in the sealing mechanism facilitates the inflation operation of the airbag, and the cooperation of the exhaust pipe and sealing cap facilitates the rapid deflation when needed. The overall structure is easy to operate and can flexibly meet the sealing and protection requirements under different working conditions in coal seam mining, reducing the difficulty of use and maintenance costs.

[0016] In summary, this invention can effectively prevent acidic solutions from flowing out along the borehole, reduce solution waste, ensure the acidification and permeation enhancement effect, and avoid causing corrosion damage to the surrounding area. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the anti-leaking acid sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining.

[0018] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0020] Figure label:

[0021] 1. Blocking plate; 2. Positioning assembly; 21. Moving rod; 22. Positioning ring; 23. Mounting ring; 24. Connecting seat; 25. Rotating shaft; 26. Support plate; 27. Slide groove; 28. Slide rod; 29. ​​Fixing rod; 210. Support rod; 211. Fixing cylinder; 212. Rubber sleeve;

[0022] 3. Sealing mechanism; 31. Fixing ring; 32. Airbag; 33. First one-way valve; 34. Connecting pipe; 35. Inflatable ball; 36. Second one-way valve; 37. Exhaust pipe; 38. Sealing cap; 39. Support ring; 310. Rubber pad; 311. Exhaust port;

[0023] 4. Adjustment component; 41. Threaded rod; 42. Threaded sleeve; 43. Fixing bracket; 44. Knob. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] The components of the present invention embodiments 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 present 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 this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 of this utility model. 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] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0029] Example

[0030] like Figure 1 As shown, the acid leakage prevention and sealing protection structure for acidizing and permeability enhancement boreholes in coal seam mining proposed in this utility model includes a plug plate 1, which is attached to the side of the coal seam at the borehole location.

[0031] For further details, please refer to Figure 1 and Figure 2The aforementioned sealing and protective structure includes a positioning component 2 disposed on the side of the plug plate 1 near the coal seam, which is inserted into the borehole. The positioning component 2 includes a movable rod 21 slidably connected to the plug plate 1. A positioning ring 22 is fixedly connected to the end of the movable rod 21 away from the plug plate 1. When the movable rod 21 moves, it drives the positioning ring 22 to move synchronously. An installation ring 23 is rotatably connected to the outer ring of the positioning ring 22. When the movable rod 21 moves, it drives the installation ring 23 to move synchronously; when the movable rod 21 rotates, it does not drive the installation ring 23 to rotate. Multiple sets of connecting seats 24 are fixedly connected to the outer side of the installation ring 23, arranged in a circular array. When the movable rod 21 moves, it drives the connecting seats 24 to move synchronously. The connecting seats 24 are U-shaped, and a rotating shaft 25 is fixedly connected to the connecting seat 24. A support plate 26 is rotatably connected to the rotating shaft 25, and the support plate 26 is rotatably connected to the connecting seat 24 via the rotating shaft 25. A groove 27 is provided in the support plate 26, and a slide rod 28 is slidably connected in the groove 27. Both ends of the slide rod 28 are fixedly connected to fixing rods 29. Multiple sets of fixing rods 29 are fixedly connected to the blocking plate 1, and the positions of the fixing rods 29 are fixed. Therefore, when the connecting seat 24 moves, the slide rod 28 slides in the groove 27, and the support plate 26 deflects, causing the end of the support plate 26 away from the connecting seat 24 to press against the inside of the drill hole, thereby fixing the blocking plate 1 to the outside of the drill hole. Multiple sets of support rods 210 are fixedly connected between the multiple sets of fixing rods 29, increasing the structural strength and making the positions of the slide rod 28 and the fixing rods 29 more stable. A fixed cylinder 211 is fixedly connected to the side of the blocking plate 1 near the positioning component 2. The fixed cylinder 211 is sleeved on the outer ring of the moving rod 21. A rubber sleeve 212 is provided between the moving rod 21 and the fixed cylinder 211. The rubber sleeve 212 is fixedly connected to the inner side of the fixed cylinder 211 and is used to seal the joint between the moving rod 21 and the blocking plate 1.

[0032] Furthermore, such as Figure 1 and Figure 3As shown, the aforementioned sealing protection structure also includes a sealing mechanism 3 installed on the plug plate 1. The sealing mechanism 3 is used to seal the borehole location. The sealing mechanism 3 includes a fixing ring 31 fixedly connected to the side of the plug plate 1 near the coal seam. An airbag 32 is installed on the side of the fixing ring 31 away from the plug plate 1. After the position of the plug plate 1 is fixed, when the airbag 32 is inflated, it effectively seals the outer area of ​​the borehole to prevent acidic solution leakage. A first one-way valve 33 is connected to the airbag 32. The first one-way valve 33 is installed in the plug plate 1, which facilitates gas entering the airbag 32 through the first one-way valve 33, while preventing gas from escaping from the position of the first one-way valve 33. A connecting pipe 34 is connected to the end of the first one-way valve 33 away from the airbag 32. An inflation ball 35 is connected to the end of the connecting pipe 34 away from the first one-way valve 33. When the inflation ball 35 is squeezed, the gas in the inflation ball 35 enters the airbag 32 through the connecting pipe 34 and the first one-way valve 33. A second one-way valve 36 is installed at the end of the inflatable ball 35 away from the connecting pipe 34. This second one-way valve 36 prevents gas from escaping through its position when the inflatable ball 35 is pressed. When the inflatable ball 35 is deflating, the first one-way valve 33 prevents gas from entering the inflatable ball 35, while outside air enters through the second one-way valve 36. An exhaust pipe 37 is connected to the airbag 32. The end of the exhaust pipe 37 away from the airbag 32 passes through the plug plate 1 and is threadedly connected to a sealing cap 38. A support ring 39 is fixedly connected to the outer ring of the exhaust pipe 37. A rubber gasket 310 is installed on the side of the sealing cap 38 near the support ring 39. When the sealing cap 38 is tightened, it compresses the rubber gasket 310, preventing gas from escaping from the airbag 32. The support ring 39 has an exhaust hole 311 on the side away from the block plate 1, which passes through the exhaust pipe 37. When the sealing cover 38 is rotated away from the block plate 1, the gas in the airbag 32 can be quickly discharged after leaking out at the exhaust hole 311.

[0033] Specifically, the aforementioned sealing and protection structure also includes an adjustment component 4 located on the side of the plug plate 1 away from the positioning component 2. The adjustment component 4 is used to fix the positioning component 2 in the borehole. The adjustment component 4 includes a moving rod 21 with a threaded rod 41 fixedly connected to the end away from the coal seam. When the threaded rod 41 moves, it drives the moving rod 21 to move synchronously. A threaded sleeve 42 is threadedly connected to the threaded rod 41. A fixing frame 43 is installed on the side of the threaded sleeve 42. The fixing frame 43 is fixedly connected to the plug plate 1, and the position of the threaded sleeve 42 is fixed, so that the threaded rod 41 moves along its own length direction when it rotates. A knob 44 is fixedly connected to the end of the threaded rod 41 away from the moving rod 21. The knob 44 facilitates the rotation of the threaded rod 41.

[0034] In this embodiment, when the knob 44 is rotated, the threaded rod 41 rotates accordingly. Since the threaded sleeve 42 is fixedly connected to the fixing bracket 43 and its position remains unchanged, the threaded rod 41 moves along its own length under the action of the thread, causing the threaded rod 41 to move away from the plug plate 1, thereby driving the moving rod 21 to move synchronously. When the moving rod 21 moves, it drives the mounting ring 23 and the connecting seat 24 to move together through the positioning ring 22. At this time, the support plate 26 on the connecting seat 24 deflects around the rotating shaft 25 because the sliding rod 28 slides in the sliding groove 27. The end of the support plate 26 away from the connecting seat 24 is gradually pressed towards the inside of the borehole. Multiple sets of support plates 26 arranged in a ring array work together to firmly fix the plug plate 1 on the outside of the borehole. At the same time, the support rod 210 enhances the structural stability of the fixing rod 29 and the sliding rod 28, and the cooperation between the fixing cylinder 211 and the rubber sleeve 212 initially prevents acidic solution from leaking from the joint between the moving rod 21 and the plug plate 1.

[0035] Then, by squeezing the inflation ball 35, the gas inside enters the airbag 32 through the connecting pipe 34 and the first one-way valve 33. The second one-way valve 36 prevents gas leakage during compression. When the inflation ball 35 returns to its original position, outside air is replenished through the second one-way valve 36. As gas is continuously injected, the airbag 32 expands and tightly adheres to the inner wall of the borehole, achieving a seal on the outer area of ​​the borehole and effectively preventing leakage of acidic solution. When it is necessary to release the seal, the sealing cap 38 is loosened, and the gas inside the airbag 32 is discharged through the vent hole 311 and the vent pipe 37. The cooperation between the support ring 39 and the rubber gasket 310 ensures the sealing performance when the sealing cap 38 is tightened.

[0036] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining, characterized in that, Including: Blocking plate (1); A positioning component (2) arranged on the side of the blocking plate (1) close to the coal seam, and the positioning component (2) is inserted into the drill hole; A sealing mechanism (3) installed on the blocking plate (1), and the sealing mechanism (3) is used to seal the drill hole position; An adjusting component (4) located on the side of the blocking plate (1) away from the positioning component (2), and the adjusting component (4) is used to drive the positioning component (2) to be fixed in the drill hole.

2. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 1, characterized in that, The positioning component (2) includes a moving rod (21) slidably connected to the blocking plate (1), a positioning ring (22) is fixedly connected to one end of the moving rod (21) away from the blocking plate (1), an installation ring (23) is rotatably connected to the outer circle of the positioning ring (22), a plurality of connecting seats (24) are fixedly connected to the outside of the installation ring (23), and the plurality of connecting seats (24) are distributed in a circular array.

3. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 2, characterized in that, The connecting seat (24) is arranged in a "U" shape, a rotating shaft (25) is fixedly connected in the connecting seat (24), a support plate (26) is rotatably connected to the rotating shaft (25), a sliding groove (27) is formed in the support plate (26), a sliding rod (28) is slidably connected in the sliding groove (27), fixing rods (29) are fixedly connected to both ends of the sliding rod (28), and the plurality of fixing rods (29) are all fixedly connected to the blocking plate (1).

4. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 3, characterized in that, A plurality of support rods (210) are fixedly connected between the plurality of fixing rods (29).

5. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 4, characterized in that, A fixing cylinder (211) is fixedly connected to the side of the blocking plate (1) close to the positioning component (2), the fixing cylinder (211) is sleeved on the outer circle of the moving rod (21), a rubber sleeve (212) is arranged between the moving rod (21) and the fixing cylinder (211), and the rubber sleeve (212) is fixedly connected to the inner side of the fixing cylinder (211).

6. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 5, characterized in that, The sealing mechanism (3) includes a fixing ring (31) fixedly connected to the side of the blocking plate (1) close to the coal seam, an airbag (32) is installed on the side of the fixing ring (31) away from the blocking plate (1), a first one-way valve (33) is connected to the airbag (32), the first one-way valve (33) is installed in the blocking plate (1), a connecting pipe (34) is connected to one end of the first one-way valve (33) away from the airbag (32), a balloon filling ball (35) is connected to one end of the connecting pipe (34) away from the first one-way valve (33), and a second one-way valve (36) is installed at one end of the balloon filling ball (35) away from the connecting pipe (34).

7. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 6, characterized in that, An exhaust pipe (37) is connected to the airbag (32), one end of the exhaust pipe (37) away from the airbag (32) penetrates through the blocking plate (1) and is threadedly connected with a sealing cover (38), a support ring (39) is fixedly connected to the outer circle of the exhaust pipe (37), a rubber pad (310) is installed on the side of the sealing cover (38) close to the support ring (39), and an exhaust hole (311) penetrating through the exhaust pipe (37) is formed on the side of the support ring (39) away from the blocking plate (1).

8. The leak-proof sealing and protection structure for acidizing and permeability-enhancing boreholes in coal seam mining according to claim 7, characterized in that, The adjustment assembly (4) includes a moving rod (21) with a threaded rod (41) fixedly connected to the end away from the coal seam. A threaded sleeve (42) is threadedly connected to the threaded rod (41). A fixing frame (43) is installed on the side of the threaded sleeve (42). The fixing frame (43) is fixedly connected to the blocking plate (1). A knob (44) is fixedly connected to the end of the threaded rod (41) away from the moving rod (21).

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