Orifice sealing device for quickly utilizing drill rod for grouting without pulling out of hole in underground coal mine

Abstract

The utility model belongs to the technical field of underground coal mine grouting sealing devices, and discloses an underground coal mine grouting orifice sealing device capable of quickly utilizing a drill rod without pulling out of a hole, which comprises a taper sealer, and a conical cavity is arranged in the taper sealer. By arranging a conical cavity, a short connecting rod, a rubber sealing plug, an upper tray and a lower tray, when grouting needs to be conducted, the drill bit position of the short connecting rod is located in a broken zone firstly, the short connecting rod is made to move towards an orifice through rotation of the short connecting rod, and the short connecting rod drives the lower tray to move leftwards (the orifice); the rubber sealing plug can be attached to the inner surface of the conical cavity, the rubber sealing plug is attached to the inner surface of the conical cavity more tightly along with gradual leftward movement of the short connecting rod, at the moment, clear water is injected through the short connecting rod, and therefore the interior and the exterior of the short connecting rod are filled with water; and then the grout is directly injected into the fissure zone through the grouting opening by the short connecting rod, so that accurate grouting operation can be carried out.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill pipe grouting sealing devices in coal mines, and specifically relates to a quick drill pipe grouting orifice sealing device without lifting the drill in coal mines. Background Technique

[0002] A coal mine shaft is an engineering structure for underground coal resource extraction, which is a crucial production site in the coal industry. It usually consists of a series of complex roadway systems, including main shafts, auxiliary shafts, air shafts, transportation roadways, return air roadways, and mining faces. Through excavation and support technologies, a stable working space is formed underground for miners to carry out coal mining operations.

[0003] In the complex geological environment of coal mines, when drilling operations encounter a formation fracture zone, the traditional approach is often to lift all the drilling tools to the ground or the wellhead, and then carry out grouting operations at the orifice. This treatment method is particularly cumbersome and lacks pertinence and timeliness. This process not only takes time and effort, increasing the operation cycle, but more importantly, since grouting is not directly carried out in the fracture zone area, its pertinence and accuracy are greatly reduced, resulting in the grouting effect being difficult to meet expectations, and at the same time causing unnecessary waste of grouting materials and increasing cost expenditures. Therefore, it needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to address the above problems. The utility model provides a quick drill pipe grouting orifice sealing device without lifting the drill in coal mines, which has the advantages of accurate grouting and no need to remove the drilling tools.

[0005] To achieve the above object, the utility model provides the following technical solution: A quick drill pipe grouting orifice sealing device without lifting the drill in coal mines, including a taper seal. A tapered cavity is provided inside the taper seal. A short joint rod is movably sleeved inside the taper seal. A thread groove is provided on the outer surface of the left side of the short joint rod. A lower tray is fixedly welded to the outer surface of the short joint rod. A rubber seal plug is movably connected to the left side of the lower tray. The inner surface of the rubber seal plug is movably sleeved with the outer surface of the short joint rod. An upper tray is movably connected to the left side of the rubber seal plug. The inner surface of the upper tray is sleeved with the outer surface of the short joint rod outside the thread groove.

[0006] Preferably, a first flange is fixedly welded to the outer surface of the left side of the taper seal. A second flange is movably connected to the right side of the first flange. An orifice casing is fixedly welded to the right side of the second flange.

[0007] Preferably, bolts are movably sleeved inside both the second flange and the first flange, and nuts are threadedly sleeved on the outer surfaces of the bolts on the left side of the first flange.

[0008] Preferably, a connecting pipe is fixedly connected to the left side of the top of the orifice casing, and a pressure gauge is fixedly connected to the top of the connecting pipe.

[0009] Preferably, the conical cavity is conical, and the internal space of the conical cavity gradually becomes larger from left to right.

[0010] Preferably, the diameter of the lower tray is smaller than the diameter value of the rubber seal plug, the diameter of the rubber seal plug is larger than the diameter value of the upper tray, and the diameter of the lower tray is larger than the diameter value of the upper tray.

[0011] Preferably, drill pipes are fixedly connected to both ends of the short joint rod.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By providing a conical cavity, a short joint rod, a rubber seal plug, an upper tray and a lower tray, when grouting is required, first make the drill bit position of the short joint rod located in the broken zone. By rotating the short joint rod, the short joint rod moves towards the orifice, causing the short joint rod to drive the lower tray to move leftward (towards the orifice), so that the rubber seal plug can fit on the inner surface of the conical cavity. As the short joint rod gradually moves leftward, the rubber seal plug fits more tightly on the inner surface of the conical cavity. At this time, inject clear water through the short joint rod to fill both the inside and outside of the short joint rod with water, and then inject the slurry through the short joint rod directly into the fissure zone through the grouting port, enabling precise grouting operations, avoiding lifting the entire drilling tool, and ensuring the sealing performance to prevent the slurry from returning out of the orifice. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a front sectional structural diagram of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the taper seal of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the rubber seal plug of the present utility model;

[0018] Figure 5 is an installation schematic diagram of the construction process of the present utility model.

[0019] In the figure: 1, taper seal; 2, conical cavity; 3, short connecting rod; 4, thread groove; 5, lower tray; 6, rubber seal plug; 7, upper tray; 8, first flange; 9, second flange; 10, bolt; 11, nut; 12, orifice casing; 13, connecting pipe; 14, pressure gauge; 15, hole wall; 16, rock and soil layer; 17, fracture zone; 18, drill pipe. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figures 1 to 5 shown, the present invention provides a quick non-drilling-out hole sealing device for grouting using a drill pipe in a coal mine underground, including a taper seal 1. A conical cavity 2 is provided inside the taper seal 1. A short connecting rod 3 is movably sleeved inside the taper seal 1. A thread groove 4 is provided on the left side of the outer surface of the short connecting rod 3. A lower tray 5 is fixedly welded to the outer surface of the short connecting rod 3. A rubber seal plug 6 is movably connected to the left side of the lower tray 5. The inner surface of the rubber seal plug 6 is movably sleeved with the outer surface of the short connecting rod 3. The left side of the rubber seal plug 6 is movably connected to an upper tray 7. The inner surface of the upper tray 7 is sleeved outside the thread groove 4 on the outer surface of the short connecting rod 3.

[0022] When grouting is required, by pulling the short connecting rod 3 to the left, the short connecting rod 3 drives the lower tray 5, the rubber seal plug 6 and the upper tray 7 to move to the left. As a result, the rubber seal plug 6 contacts the inner surface of the conical cavity 2. As the short connecting rod 3 moves, the rubber seal plug 6 will fit more tightly with the conical cavity 2, thereby completing the sealing and ensuring that the grout will not return out of the hole during grouting.

[0023] Among them, a first flange 8 is fixedly welded to the left side of the outer surface of the taper seal 1. A second flange 9 is movably connected to the right side of the first flange 8. An orifice casing 12 is fixedly welded to the right side of the second flange 9.

[0024] As a technical optimization solution of the present invention, by providing the first flange 8, the overall installation of the taper seal 1 is carried out.

[0025] Among them, bolts 10 are movably sleeved inside both the second flange 9 and the first flange 8. Nuts 11 are threadedly sleeved on the outer surface of the bolts 10 on the left side of the first flange 8.

[0026] As a technical optimization solution of the present utility model, the taper sealant 1 is installed integrally by setting bolts 10 and nuts 11.

[0027] Among them, a connecting pipe 13 is fixedly connected to the left side of the top of the orifice casing 12, and a pressure gauge 14 is fixedly connected to the top of the connecting pipe 13.

[0028] As a technical optimization solution of the present utility model, the outer surface of the orifice casing 12 fits the inner surface of the hole wall 15, and the whole device is installed inside the rock and soil layer 16. The right side of the rock and soil layer 16 is a fracture zone 17. The operator can determine whether the gaps inside the fracture zone 17 are completely filled with slurry by observing the reading of the pressure gauge 14.

[0029] Among them, the conical cavity 2 is conical, and the internal space of the conical cavity 2 gradually becomes larger from left to right.

[0030] As a technical optimization solution of the present utility model, since the internal space of the conical cavity 2 gradually becomes larger from left to right, the rubber seal plug 6 will fit more and more tightly with the inner surface of the conical cavity 2 when moving to the left.

[0031] Among them, the diameter of the lower tray 5 is smaller than the diameter of the rubber seal plug 6, the diameter of the rubber seal plug 6 is larger than the diameter of the upper tray 7, and the diameter of the lower tray 5 is larger than the diameter of the upper tray 7.

[0032] As a technical optimization solution of the present utility model, since the diameter of the upper tray 7 is smaller than the diameter of the rubber seal plug 6, the rubber seal plug 6 can contact the inner surface of the conical cavity 2 prior to the upper tray 7.

[0033] Among them, drill pipes 18 are fixedly connected to both ends of the short joint rod 3.

[0034] As a technical optimization solution of the present utility model, the short joint rod 3 is a connecting rod with a threaded groove 4 on its outer surface, which is self - processed. Its whole is located inside the taper sealant 1, and both of its sides are connected to the drill pipes 18. The end of the drill pipe 18 on the left side of the short joint rod 3 is connected to the power device of the drill pipe 18. Furthermore, the rotation of the short joint rod 3 makes the rubber seal plug 6 fit with the inner wall of the conical cavity 2 to achieve sealing.

[0035] The working principle and usage process of the present utility model:

[0036] The operator installs the orifice casing 12 inside the hole wall 15, and then installs the taper seal 1 inside the orifice casing 12 through bolts 10 and nuts 11. When grouting operation needs to be carried out on the broken zone 17, first, the right end of the short connecting rod 3 is located inside the broken zone 17, and then the rotation of the drill pipe on the left drives the short connecting rod 3 to rotate, so that the short connecting rod 3 moves leftward (towards the orifice), causing the lower tray 5 to drive the rubber seal 6 to move leftward, and then the rubber seal 6 contacts the inner surface of the conical cavity 2. As the short connecting rod 3 moves, the rubber seal 6 will fit more tightly with the conical cavity 2, thus completing the sealing to ensure that the grout will not return to the orifice during grouting. Then, clear water is injected through the short connecting rod 3 to fill both the inside and outside of the short connecting rod with water. At this time, the inside of the drill hole is filled with water. Then, the grout is injected through the short connecting rod 3, and the grout is discharged through the grouting holes, so that grouting operation can be carried out (at this time, because the part of the drill hole between the broken zone 17 and the taper seal 1 is filled with water, and one side of the taper seal 1 has been sealed, the grout cannot flow towards the drill hole and can only flow towards the broken zone, thus ensuring the effect of fissure grouting), avoiding lifting the entire drill tool, ensuring the sealing performance at the same time, and preventing the grout from flowing out of the orifice. The operator can observe the pressure gauge 14 to judge whether the gaps inside the broken zone 17 are filled with grout. After grouting is completed, wait for a period of time. After the grout begins to set, the entire taper seal 1 and the short connecting rod 3 are pulled out of the drill hole to avoid the drill being buried due to the curing of the cement grout.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick drilling-free orifice sealing device for grouting using drill pipes underground in coal mines, comprising a taper seal (1), characterized in that: The inside of the taper seal (1) is provided with a tapered cavity (2). A short joint rod (3) is movably sleeved inside the taper seal (1). A threaded groove (4) is formed on the left side of the outer surface of the short joint rod (3). A lower tray (5) is fixedly welded to the outer surface of the short joint rod (3). A rubber seal plug (6) is movably connected to the left side of the lower tray (5). The inner surface of the rubber seal plug (6) is movably sleeved with the outer surface of the short joint rod (3). An upper tray (7) is movably connected to the left side of the rubber seal plug (6). The inner surface of the upper tray (7) is sleeved outside the threaded groove (4) on the outer surface of the short joint rod (3).

2. A quick downhole coal mine drilling rod non - lifting grouting orifice sealing device according to claim 1, characterized in that: A first flange (8) is fixedly welded to the left side of the outer surface of the taper seal (1). A second flange (9) is movably connected to the right side of the first flange (8). An orifice sleeve (12) is fixedly welded to the right side of the second flange (9).

3. A quick orifice sealing device for grouting using drill pipes without pulling out the drill in underground coal mines according to claim 2, characterized in that: Bolts (10) are movably sleeved inside both the second flange (9) and the first flange (8). Nuts (11) are threadedly sleeved on the outer surfaces of the bolts (10) on the left side of the first flange (8).

4. A quick orifice sealing device for grouting using drill pipes without pulling out the drill in underground coal mines according to claim 2, characterized in that: A connecting pipe (13) is fixedly connected to the left side of the top of the orifice sleeve (12). A pressure gauge (14) is fixedly connected to the top of the connecting pipe (13).

5. A quick orifice sealing device for grouting using drill pipes without pulling out the drill in underground coal mines according to claim 1, characterized in that: The tapered cavity (2) is conical, and the internal space of the tapered cavity (2) gradually becomes larger from left to right.

6. The orifice sealing device for quickly grouting by using drill pipes without pulling out the drill in the coal mine as claimed in claim 1, wherein: The diameter of the lower tray (5) is smaller than the diameter value of the rubber seal plug (6). The diameter of the rubber seal plug (6) is larger than the diameter value of the upper tray (7). The diameter of the lower tray (5) is larger than the diameter value of the upper tray (7).

7. A quick sealing device for the orifice of grouting using drill pipes without pulling out the drill in underground coal mines according to claim 1, characterized in that: Drill pipes (18) are fixedly connected to both ends of the short joint rod (3).

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